地下管道施工方案正式版

目录Catalogue

一、概述General description (2)

二、管沟开挖及管基础处理Trench excavation and foundation treatment ·3

三、钢管安装Steel pipe installation (11)

四、水压试验Hydraulic test (17)

五、管道防腐Pipe anticorrosion (21)

六、检查井、水封井和雨水口Inspection well, water closing well and inlet24

七、质量控制Quality control (26)

八、交工验收Take over (27)

九、劳动力需用计划Manpower schedule (28)

十、施工机具及手段用料需用计划Construction tools and material schedule29 十一、施工总体进度计划General construction schedule (31)

一、概述

一、Introduction

1.1、乙烯装置地下管道主要包括循环冷却给水管道SW、循环冷却回水管道RW、中间冷却给水管道IW、污染雨水及生产污水管道SD、高压消防水管道FW、清净雨水管道ND。管道材质有碳钢管、玻璃钢管。地下管道安装工程量见表1。

The underground piping of ethylene complex mainly refers to the installation of piping for recycling cooling water, industry water, firefighting water, sewage and rain water pipelines. The piping material includes steel pipe, cast iron pipe, and sand inclusion spiral glass fiber reinforced plastic pipe etc. The workload of installation of underground piping can refer to the Table 1.

地下管道安装工程量一览表表1

Table 1 List of quantity of underground piping installation

1.2、Reference:

1.2.1、设计图纸SEI DWG.NO 。（3102-7900-S-1～35）Design drawings

1.2.2、《给水排水管道工程施工及验收规范》。（GB 50268-97）<>

1.2.3、《埋地给水排水玻璃纤维增强热固性树脂夹砂管管道工程施工及验收规程》。

（CECS 129：2001）<

supply and sewerage engineering with underground glass fiber reinforced

thermosetting resin mortar pipes>>

1.2.4、《钢质管道聚乙烯胶粘带防腐层技术标准》。（SY/T0414-98）<

of polyethylene tape coating for steel pipeline>>

1.2.5、《给水排水管标准图集合定本S1》（上、下册2002版）<

sewerage pipelines standard collection of drawings >>

二、管沟开挖及管基础处理

二、Excavation of piping trenches and treatment of piping foundation

2.1、定位放线

Positioning setting-out

2.1.1、开工前业主主管部门应提供装置的坐标方格网和永久水准位置及高程数值，并把高程引至装置预先选择好的位置。

Before starting, construction personnel should ask for the coordinate grid net, permanent

benchmark and elevation of the equipment from the Owner’s authority department. The elevation should be led to the pre-selected location.

2.1.2、平面位置应以地下管道中心线及坐标进行放线，控制桩应设在管道敷设中心线两侧，距中心线不少于3m且便于观察的地方。沿管道铺设方向应设置临时水准点，且每隔200m不宜少于一个。

Plane locations should be set-out according to the center line and coordinate of the underground piping. Control piles should be set up at both sides of the center line of the piping, and at the location more than 3m away from the center line and easy for observation. At least one reference point should be setup each 200m according to the pipelines.

2.1.3、测量人员按施工要求,根据控制桩定出管线中心位置，沿管线沟槽开挖宽度在地面上撒灰线标明开挖边线。

Survey personnel determine the location of piping center according to control pipes based on construction requirements. Lime line is drawn on the ground along the excavation width to indicate the edge line of the excavation.

2.2、沟槽开挖Trench excavation

2.2.1、沟槽开挖时应根据所放白灰线进行，施工中采用反铲挖掘机，开挖时应在设计槽底高程以上保留200mm余量，防止超挖,余量用人工清挖。对于不宜采用机械开挖的部位采用人工开挖。

Trenches should be excavated as per the lime line set out. Reverse shoveling excavator is used in construction. 200mm margin should be reserved above the design bottom elevation. Over-excavation should be avoided and the margin should be excavated by man power. The location improper for machine excavation should be excavated by man power.

2.2.2、沟槽出现超挖或扰动情况时，应及时处理，用碎石回填压实，压实密度不低于天然地基。当沟槽底部为淤泥时，应比设计高程深挖300mm，然后用碎石回填到设计高程。槽底高程的允许偏差为±20mm。

The over excavation and disturbance of trenches should be treated in time. If the over excavation of dry trenches is within 150mm, it can be backfilled and compacted with original earth, and the compacting density should not be lower than that of the natural ground.

2.2.3、沟槽开挖时其两侧沟壁放坡坡度及底宽要求，应严格执行规范规定。当边坡无支撑且坡顶无负荷时，沟槽开挖坡度不低于1：1.0。如开挖放坡受限和土方转运有困难时，

应采用适当的方式支撑边坡，保证施工安全。管道沟槽底部的开挖宽度为：B=D1+2（B1+B2+B3）。其中D1为管道外缘宽度。B1为管道一侧的工作面宽度,具体见表2。B2为管道每一侧的支撑厚度（150—200㎜）。B3为现场浇灌混凝土管渠一侧防护板的厚度。The width of the trench bottom and the sloping of the trench walls should strictly accord with code regulations. The slope of trench excavation is no less than 1:1.0 when no slope bracing and no loading on the top of slope. Proper slope bracing should be used if there is difficulty in excavation and earth delivery to ensure construction safety. The bottom width of pipe groove is B=D1+2（B1+B2+B3）. The D1 is the outside width and the B1 is the working width of one side, the detail in table 2. The B2 is the support thick of each side (150~200mm). The B3 is the thick of protection plate which is located one side of the pouring concrete pipe duct.

管道一侧的工作面宽度（mm）表2 Working face width of the piping (mm)……………Table 2

2.2.4、管沟开挖出的泥土等，堆在管沟的一侧，堆放高度不宜超过1.5m，且距沟边缘不宜小于0.8m。对于2#路和4#路等，如果现场泥土无法堆放，需将泥土及时运出现场，堆放到甲方指定位置,待管道安装试压完毕后，再运进现场进行回填。当原土不满足回填条件时，应采用满足设计要求的新土进行回填。

The earth excavated should be stacked on one side of the trench and the stacking height should not exceed 1.5m and the distance to the edge of the trench should not be less than 0.8m。The earth should be stacked according to the requirement of the contract, which is excavated form 2# or 4# road. After the piping pressured test, the earth should be backfilled into the site. If the original earth is not according to the requirement, the qualified earth should be backfilled.

2.2.5、当沟槽挖深较大时，应合理确定分层开挖的深度。采用机械挖槽时，沟槽分层的深度应按机械性能确定。The depth of laying-excavated should be ensured according to the

mechanical character.

2.2.6、施工时，应合理安排施工顺序。考虑到装置路面的修复和管廊混凝土柱子浇注进度，需将3#、7#路下的埋地管道进行先期施工。对于6#路下的埋地管道，考虑到将来要走重型机械，可能对已施工完毕的消防管线造成破坏，需进行特殊保护。应采取在道路上铺设钢板的预防措施，钢板的厚度应不应低于30mm，所铺设的范围应为路面下有地下管道的部分，共计两段。然后可以施工裂解炉周围和2#、4#和9#路附近的埋地管道。最后施工受其他工程影响而暂时无法施工的部分。For the road repair and schedule of the concrete column pouring, the underground piping in 3# and 7# road should be constructed in advance during the construction. Special protect should be used for the underground piping in 6# road because the pressed caused by heavy machines. The steel plate (thick more than 30mm) should be paved on the road.

2.3、施工排水drainage

2.3.1、沟槽开挖中，对于沟槽内地表积水的排除，尤其是2#路、4#路两边管沟受路基下地表水影响较大，可采用盲沟或积水坑排水法，使用潜水泵抽水。针对本装置内地下水位较高，故需采用井点降水法，当采用井点降水时应使地下水位降至沟槽地面以下不小于0.5m。井点孔的直径应为井点孔外径加2倍过滤层厚度（一般为10-15cm）。

Drainage scheme should be determined according to the underground water level. If piping foundation is above the underground water level, blind trench or catch pit can be used for draining pond in trench with submerged pump. Well point method should be used for the drainage.

2.3.2、井点管的安装应居中，并保持垂直。填滤料时，应对井点管口临时封堵。滤料应沿井点管外四周均匀灌入；灌填高度应高于地下水静水位。The well point pipe would be placed in the middle and kept uprightness. During the feeding, temporary capping are used for the mouth of the well point pipe. Filling the material following the side of well point pipe and the height would higher than the level of underground stationary water.

2.3.3、轻型井点的集水总管底面及水泵基座的高程宜尽量降低。滤管的顶部高程，宜为井管处设计动水位以下不小于0.5m。The collector pipes bottom of the light-duty well point and the basement of water pump would be reduced in most cases. The difference in height for the filter pipe top and water level of well pipe would be more than 0.5m .

2.3.4、井壁管长度的允许偏差应为±100mm；井点管安装高程的允许偏差应为±

100mm。The scope of allowable deviation for the well end pipe length is ±100mm and the scope of allowable deviation for the well point pipe height is ±100mm.

2.3.5、施工排水终止抽水后，排水井及拔除井点管所留孔洞，应立即用砂、石等材料填实；地下水静水位以上部分，可采用粘土填实。After drainage, the holes and drain well would be filling with sand, rock and etc. The clay soil would be used for the part on the level of underground stationary water.

2.3.6、井点管的制作，可以采取下面的制作方法。集水管的规格宜为φ89×4.5，长度不宜超过100m。在集水管上每隔1.0m焊接一条φ60×4的支管，支管长度宜为200mm～300mm。井点管规格宜为φ60×4，长度为5～6m，具体长度视沟槽深度而定。井点管底部800mm范围内均匀钻φ8的孔，孔与孔的纵向间距宜为100mm，沿管子四周均匀分布三列，列与列的孔应彼此错开。井点管底部用木楔堵死。滤管钻孔范围四周用滤网缠绕，滤网可选择50～80目，搭接量为20 mm～30 mm。井点管与集水管用塑料管连接，集水管的支管应朝上。最后集水管与真空泵相连，由真空泵将水排出。The fabrication method for well point pipe as follow: the specification of collector pipe isφ89×4.5 and the length is less than 100m. One branch pipe (φ60×4) would be welded on the collector pipe every 1.0m and the length scope of branch pipe is 200mm~300mm. The specification of well point pie isφ60×4 and the length scope is 5~6m and the detail length are ensured according to the depth of groove. The holes (φ8) are evenly distributed at the bottom of the well point pipe. The space between the holes is 100mm in longitudinal. Wood key would be used to block up the bottom of the well point pipe. Filter screen would be used to wrap the hole of filter pipe and the lap is 20mm ~ 30mm. The plastic pipe is used to connect the well point and the collector. At last, connect the collector pipe and vacuum pump and drain by the pump.

2.3.7、井点排水施工具体步骤如下：井点管应安装在沟槽一侧不影响挖沟的部位。首先选好井点位置，接着用高压水枪进行钻孔，然后将井点管安放进去，固定好位置。紧接着沿井点管四周均匀填入滤料，滤料的装填按2.3.2条的要求进行，最后将集水管和井点管，真空泵相连，即可开泵排水。排水渠道应由监理现场指定。The construction step of well point drainage as follow: the well point pipe would be installation on the side which are non-effect for groove. Select the well point position at first and drill hole by high-press monitor, put the well point pipe in the hole and fixed the position, then feeding equality following the well point pipe side, the detail requirement see 2.3.2. drainage after connecting the collector pipe,

well point pipe and vacuum pump and the drainage channel are designated by supervision.

2.4、沟槽支撑Support for groove

2.4.1、当沟槽深度超过1.5米或边坡靠近路边，放坡会导致土方挖掘量过大时，可采取增设支撑的形式对边坡进行加固。当撑板采用木材时，其构件规格宜符合下列规定：If the depth of groove is more than 1.5m or the side slope near the road, the side slope need reinforced and adding supports are adopted. If the support plate is wood, the specification of component according to the following item.

撑板厚度不宜小于50mm，长度不宜大于4m；横梁或纵梁宜为方木，其断面不宜小于150mm×150mm；横撑宜为圆木，其稍径不宜小于100mm；同时每根横梁或纵梁不得少于2根横撑，横撑的水平间距宜为1.5m～2.0m，横撑的垂直间距不宜大于1.5m。The thick of support plate is more than 50mm and the length is more than 4m. The beam or longitudinal beam is rectangular timber and the section is more than 150mm×150mm. The waling would be round wood and the diameter is more than 100mm. Tow walings are needed for each beam or longitudinal beam and the level interval is 1.5m~ 2.0m and the vertical interval is less than 1.5m.

2.4.2、撑板支撑应随挖土的加深及时安装。在软土或其他不稳定土层中采用撑板支撑时，开始支撑的开挖沟槽深度不得超过1.0m；以后开挖与支撑交替进行，每次交替的深度宜为0.4～0.8m.The bracing would be installed along with the excavation. The depth of excavation is no more than 1.0m when the bracings are used in the soft soil. Then the excavation and bracing executed by turns, the suitable depth is 0.4~0.8m.

2.4.3、撑板的安装应与沟槽槽壁紧贴，当有空隙时，应填实。横梁应水平，纵梁应垂直，且必须与撑板密贴，连接牢固；横撑应水平并与横梁或纵梁垂直，且应支紧。The bracing installation would cling with the wall of groove. The beam would be level, and the longitudinal beam would be vertical and cling with the bracing and connected firmed.

2.4.4、上下沟槽应设安全梯，不得攀登支撑。The safety ladders would be placed at the grooves and climbing the support are forbidding.

2.4.5、支撑的拆除应与回填土的填筑高度配合进行，且在回填后应及时回填。多层支撑的沟槽，应待下层回填完毕后再拆除其上层槽的支撑。Remove the bracing and backfill soil would be executed by turns. Remove the top bracing after backfill the bottom layer.

2.5、管基处理Treatment of piping foundation

2.5.1当沟槽挖到设计高程后，按设计要求底层应铺设300mm厚的碎石层，并夯实，

密实度=94%。When the height of groove is the design height, pave broken stones layer (Thick is 300mm) and compaction, the compaction rate is 94%.

2.5.2、然后铺设一层中砂粗砂，厚度要求为距管底不小于100mm，顶部高程为管中心。对于玻璃钢管线，需浇注1800带型混凝土基础，混凝土标号为C30。最小厚度为距管底不小于100mm。混凝土顶部高程为管中心。在浇注混凝土时，应先浇注管道底部基础，同时在承插口部位预留出工作坑。当底部基础浇注完毕，满足设计高程且强度达到使用要求后，再进行玻璃钢管安装。管道固定好位置后，进行管道两边基础浇注。在浇注时，应确保管道与基础之间充分进行填充，不得有间隙。当混凝土强度达到设计要求时，然后再进行后续回填工程。Then paving the thick sand, the thick requirement is no less than 100mm, the top height is the center of pipe. For glass steel pipeline, the 1800 concrete would be pouring as foundation, the concrete class is C30. the min thick is no less than 100mm. The top height of concrete is the center of pipe. Pouring the foundation of pipe first and obligate working pit at the same time. When the pouring are finished and the height and the strength is qualified, install the glass steel pipe. Pouring the foundation of pipe when the pipe is location. When the strength of concrete is qualified, executed the backfill soil.

2.5.3、混凝土带型基础两边空隙用中砂粗砂回填，回填高度为管中心，并夯实。Backfill and compaction middle sands into the interval of concrete foundation. The backfill height is the center of the pipe.

2.6、工作坑开挖Excavation of operating pit

2.6.1、在沟内施焊的钢管管口部位及玻璃钢管承插口处，应在沟底挖工作坑，为防坑内存水，可在焊接作业及焊缝检验结束后用虚土回填。

At the location of steel piping joints that will be welded in the trench, welding operating pit should be excavated at the trench bottom. To avoid ponding in the pit, it can be backfilled with loose earth after welding works and welded joint inspection is finished.

2.6.2、现场各焊接管口处的试压检查坑应能满足管道试压检查和防腐补口需要，一般选择尺寸为800×800×300mm，在试压作业前挖妥。

To satisfy the requirements of piping pressure test and anti-corrosion opening, the pressure test inspection pit at welded piping nozzles should be excavated before pressure test. The general size is 800×800×300mm.

2.6.3、玻璃钢管工作坑尺寸见表3

The dimension of fiber glass pipe working pit see the following table 3.

接口工作坑开挖尺寸Dimension（mm）表3 table 3

D1为管外径（mm）D1 is the external diameter of the pipe.

2.7、沟槽回填Trench backfill

2.7.1、对于压力管道，当水压试验及严密性试验合格且焊口外防腐补漏、补口合格后，对于玻璃钢管道，当每道接口严密性试验合格及带型基础强度满足要求，以及其它隐蔽项目经共检合格后，应及时回填沟槽。For pressure pipe, after the hydraulic pressure test and leakage test, outside of crater anticorrosion, repaired mouth is qualification. For glass steel pipe, backfill trench in time after the leakage test, strength and the hidden item are qualification.

2.7.2、沟槽回填应按照设计图纸要求进行，最底下一层采用中砂粗砂回填，回填高程为管中心。第二层用原土回填，回填土最大颗粒不大于40mm，回填高程为高于管顶200mm。第三层用原土回填，回填土夯实的压实系数大于96%，回填高程应为地面高度。Trench backfill according to the requirement of design drawing. The bottom backfilled by medium sand or thick sand, the height of backfill is the center of pipe. The second layer backfilled by original soil, the max particle of backfill earth is less than 40mm and the height is 200mm higher than the top of pipe. The third layer is backfilled by original soil and the compaction factor is more than 96%, the height of backfill is the ground level.

2.7.3、管腔两侧沟腔填土应对称运入和夯实，且需分层夯实，不得使管道发生位移和损伤。Symmetry compaction in layers and backfill soil to the both side of pipe. Avoid the pipe moved and damaged.

2.7.4、对于过路管道或套管，回填时，应用中砂或粗砂回填到高于管道或套管顶部300mm处。For the pass by pipe and sleeving, backfill the medium sands or thick sands until the

height is 300mm higher than the top of pipe and sleeving.

三、钢管安装Installation of steel piping

3.1、钢管、钢管件、阀门检验Inspection of steel piping, fitting and valve

3.1.1、钢管、钢管件、阀门的材质、规格、压力等级应符合设计文件要求，必须有出厂合格证书。

The material, specification and pressure of steel piping, fittings and valves should accord with requirements of the design documents. They must be attached with quality certificates and the contents and data in the quality certificates should accord with requirements of current national standards.

3.1.2、阀门规格、型号、压力等级应符合设计规定，且外观检验合格。阀门到货后，需对阀门逐一进行试压，阀门以公称压力的1.5倍进行强度试验。以公称压力进行严密性试验，以无泄漏、无渗漏为合格。

The material, specification and pressure grade of valves should accord with the design regulations and the appearance should be examined. Pressure test should be done one by one after the valves delivered. Strength test with 1.5 times of nominal pressure should be done on valves. Tightness test with nominal pressure should be done and the valves are qualified if no leakage and seepage is found.

3.1.3、由于部分管沟离道路较远，且地基土质松软，如2#路和950管廊等处，吊车和运输车无法将管材，石料等运到沟边，因此需要进行二次倒运管材。使用50吨履带式吊车，下面铺设钢板进行倒运。石料及沙土采取铺钢板，然后用挖掘机进行倒运。Secondary convey are needed because some grooves are far away from the loose road, such as 2# road and 950 pipe rack. Steel plate are paved for the 50t crawler crane convey the stones and the excavator convey the sands.

3.2、钢管安装Installation of steel piping

3.2.1、钢管安装前应逐根测量，要选用管径相差最小的管子进行组对连接。并应先检查管子的防腐层，合格后方可安装。防腐层若有外伤，补伤完毕并检查合格后方可安装。

Steel piping should be measured one by one before installation. The pipes whose diameter difference is smallest should be joined. The anti-corrosion layer of the piping should be examined first and only qualified piping can be installed. If anti-corrosion layer is damaged, it

should be repaired and examined before installation.

3.2.2、钢管进行单根下管，吊装时必须事先对吊车能力及地面承载能力进行计算核实。

Single steel piping can be laid. If longer piping assembled by groups of pipes needs to be laid down, the crane capacity, stiffness of steel piping and ground carrying capacity must be calculated and verified in advance.

3.2.3、钢管单根下管时可用尼龙兜带吊装下管，长管段下管时可使用外套橡胶管的钢丝绳兜捆，为防止变形应采用多吊点抬吊。

Single steel piping can be laid down using nylon kicking strap. The longer piping can be wrapped and bound with steel wire rope shielded by rubber pipes.

3.2.4、钢管运到现场时,宜沿沟边摆放布置，不宜过于集中，若因条件限制时应尽量缩短二次倒运距离。运输过程中应严格保护好管道防腐层，运到现场的钢管应下垫上隔保护好。

Steel piping should be laid along the side of the trench when it is transported into the site. It should not be laid too centralized. If necessary, the distance for secondary delivery should be shortened as much as possible. Mat should be set up under the steel piping and separation material should be set up on it for good protection.

3.2.5、钢管对口时应保持内壁平齐。用300mm直尺在接口周围贴靠，错口的允许偏差为0.2倍壁厚，且不得大于2mm。

Before assembling two steel pipes, the perimeters of the two ends and the verticality of the end faces should be verified first. The two inner walls should be in same level when the two pipes are assembled. The allowable deviation measured with ruler at the joint should not be larger than 2mm.

3.2.6、焊接钢管组对时环向焊缝距支架净距不应小于100mm；直管段两相邻环向焊缝的间距应不小于200mm；管道任何位置不得有十字形焊缝。

The net distance between the circumferential welding joints and the support should not be less than 100mm。The spacing between two neighbor ring-direction welding joints in the straight piping section should not be less than 200mm.。Cross welding joint is not allowed at any location.

3.2.7、对于有开管口要求的管段,组装前应核准管口开口位置，其开口部位不得有焊缝，否则应旋转或更换钢管，任何管口均不得开在焊缝和管件上。

For piping sections in which nozzle will be provided, the locations of the nozzles should be

verified before they are joined. Welding joint is not allowed in the opening, or the steel piping should be rotated or replaced. Any nozzle should not be on the welding joints and fittings.

3.2.8、钢管组对完毕，检查合格后方可进行定位点焊，点焊应采用同正式焊接相同的焊接材料和焊接工艺规范。点焊施焊应对称进行，其焊接厚度应与第一层焊接厚度相同。点焊长度为50～60mm，数量为5点，且沿管道周围均匀分布，不得在纵焊缝处点焊。

After the steel piping is assembled and examined, tack welding for positioning can be carried out. The welding material and welding process for tack welding should be the same as that of the formal welding. Tack welding should be performed symmetrically, and the welding thickness should be the same as that of the first layer of welding.

3.2.9、钢管安装完毕后应将两端管口进行封闭，防止杂物及非作业人员随便进入管内，造成管内污染。做好槽边雨水径流疏导路线的设计及槽内排水措施，防止雨季沟槽积水发生漂管现象。一般采取在沟槽底部挖排水沟，同时在沟槽下游设积水坑，然后用潜水泵排水的方法。

After steel piping is installed and tack welding is finished, the piping should be backfilled in time. Backfilling should be carried out from both sides at the same time to 0.5m above the piping top. The nozzles at two ends of the steel piping should be sealed after installation to prevent rubbish or non working personnel from entering that may cause pollution inside of the piping.

3.3、焊接及检验Welding and inspection

3.3.1、管口焊接前应先修口，管端端面的坡口角度、钝边、间隙应符合焊接工艺规程要求。具体要求见附表1

Groove should be prepared before welding the pipe nozzle. The groove angle, root face and spacing at the end face should accord with requirements of welding technology procedures. See the detail in table 1:

3.3.2、管口内外侧钢管表面应将油垢、泥土、杂物全部清理干净，并应用砂轮将管口边缘及坡口两侧各不小于10mm的范围内的钢管表面打磨出金属光泽。

The oil, earth, and rubbish on the outer and inner surface of the piping nozzle should be removed and cleaned. The nozzle edge and the steel piping surface within not less than 10mm scope at the both sides of the groove should be polished to have metal luster with the grinding wheel.

3.3.3、施焊人员必须持有由劳动部门颁发的焊工合格证，其材质类别及项目代号应与

施焊位置相同，且在有效期内。

The welding personnel must hold permits issued by the labor department. The material and job code should be the same as that needed. The permit should be valid.

3.3.4、钢管材质为Q235-B，选用J422（E4303）酸性碳素结构钢焊条，采用手工电弧焊焊接，焊条规格为Φ3.2mm、Φ

4.0mm

Steel piping material to be used is Q235-B. J422(E4303) acidic carbon structural steel welding rod is used. Manual arc welding is used. The specification of the welding rod is Φ3.2mm，Φ4.0mm.

3.3.5、焊接材料必须有出厂合格证书，使用前应按要求进行烘干并恒温保存。焊条要用专用焊条筒携带到施工现场，并应一次使用完毕。使用时随用随拿，剩余焊条应送回烘干室，重新烘干后方可使用。表面锈蚀、焊药脱落的焊条不得使用。

The welding material must be attached with quality certificates and is dried as required and stored at constant temperature before being used. The welding rods should be carried to the construction site with special welding rod carrier and should be used up in one time. The welding rod should be taken out from the carrier for use, and left ones should be sent back to drying and can be used only being dried. The welding rods whose surface is rust and flux is flaked cannot be used.

3.3.6、管口焊接时，焊接工作宜一次完成，若因故不能一次焊接完毕，下次焊接前应按坡口处理要求重新处理合格后方可继续焊接。

The welding of piping nozzle should be finished in one time. If cannot, the groove should be re-treated according to the requirements before continuing the welding.

3.3.7、厚壁管道采用多层焊接，每层焊接接头处应认真打磨，且各层的焊接接头处应相互错开，盖面焊肉要波纹整齐、表面光滑、结合良好。

Multiplayer welding is used for thick wall piping. The welding joints at each layer should be polished carefully and the welding joints at different layer should be staggered. The cover welding should be of orderly ripple, smooth surface and good combination.

3.3.8、当风力大于5级、下雨天气及相对湿度大于90% 时，无有效保护措施不得施焊。

When wind force is greater than Grade 5, and in rainy days or the relative humidity is heavier than 90%, welding is not allowed without protective measures.

3.3.9、由于受材料到货计划影响，部分支线、阀门和三通无法在施工阶段到货，必将影响安装。采取的措施是先安装主线，然后进行试压回填。待其他材料到货后，再用人工开挖管沟，最后进行支线、阀门和三通安装。Because the delay of material supply, some branches, valves and tees would not supplied in construction period, install the main pipeline first and then backfill for pressure test. When the other materials are supplied, excavate groove by manpower and install the branches, the valves and the tees at last.

3.4、焊缝检验Inspection of welding joints

3.4.1、管口焊接完毕，应及时清除表面的渣皮及两侧的飞溅物。焊缝的外观检查应在水压试验之前进行，焊缝的外观质量应符合如下规定：

After the piping nozzle is welded, the slag crust on the surface and the splashed dregs on both sides should be removed in time. The appearance inspection should be done before the hydrostatic test. The appearance quality of the welding joint should accord with the following regulations:

①、焊缝和热影响区表面不得有裂纹、气孔、弧坑和夹碴等缺陷；表面光滑、均匀，焊缝和母材应平缓过渡；

Cracks, gas porosity, arc pit and slag are not allowed in the welding joints or on the surface of heat affected zones. The surface should be smooth and even. The welding joints should gradually join with the base metal.

②、焊缝宽度应焊出坡口边缘2～3mm;

The welding joint should be extended 2~3mm out of the edge of the groove;

③、焊缝高出母材高度应小于2.5mm；

The height of the welding joint above the base metal should be less than 2.5mm;

④、焊缝咬边深度应小于或等于0.5mm，焊缝两侧咬边总长不得超过焊缝长度的10%，且连续长度应不大于100mm；

The depth of the weld undercut should be less than or equal to 0.5mm. The total length of both sides of welding undercuts should not exceed 10% of the length of the welding joint, and the continuous length should not be larger than 100mm;

⑤、错边量应不大于2mm；

The displacement should not be larger than 2mm;

⑥、焊缝不得低于母材。

The welding joint should not be lower than the base metal.

3.4.2、不方便进行二次试压的管线，可以对焊缝进行100%超声波无损检测（UT），角焊缝进行100%表面着色（PT）处理（执行JB4730-94,Ⅱ合格）。探伤不合格的焊缝应返修，返修次数不得超过三次。

The butt welding joints (circular joints) on the pipe should be done with NDT as per the design requirements. Unqualified welding joints should be repaired, and the times of repairing should not exceed 3 times.

3.5、夹砂缠绕玻璃钢管安装Installation of sand inclusion spiral glass fiber reinforced plastic piping

3. 5.1、夹砂缠绕玻璃钢管安装前，应按设计要求进行检查，管道不得有任何损坏痕迹。The pipe would be inspected according to the requirement of design before the sand inclusion spiral glass fiber reinforced plastic piping is installed to ensure no any damage.

3.5.2、夹砂缠绕玻璃钢管安装前，应检查管道的承口、插口与密封圈接触的表面，表面应平整、光滑、无滑痕、无气孔。The surface of pipe socket and seal ring would be inspected before the sand inclusion spiral glass fiber reinforced plastic piping is installed to ensure the surface is level off, smooth, no slip mark and no air vent.

3.5.3、安装时，管道水压试验用的进水口及锁键槽摆在管道顶端。插口端与承口变径处在轴向应有一定间隙、DN300～1500mm管的间隙应控制在5～15mm。“O”型圈应紧密贴合在承口和插口的内外壁之间，且“O”型圈不能发生扭转。安装时应先将橡胶圈套入插口上的凹槽内，然后沿橡胶圈四周依次向外拉并慢慢放回凹槽，以保证橡胶圈受力均匀没有扭曲。During the installation, the inlet and lock key socket for the piping hydraulic test are placed on the top of the pipe. The clearance located between the end of socket and the socket reducer in axial. The clearance is 5~15mm between the DN300~1500mm pipes. The O type ring would be installed in the inside wall and outside wall and could not be torsion. First, trap the rubber ring into the channel of socket and to ensure no torsion.

3.5.4、在检查确认无损的情况下，依据厂家画出的插进深度限位线，将卡具卡紧在两管上，保证两管在同一条直线上，将装入“O”型圈的插口压入承口，压入深度符合限位线要求即可。然后用钢板条插入承口和插口之间的环状空隙，沿圆周检查一圈，确定橡胶圈槽内深度是否一致，否则应重新连接。Install the clip on the two pipes and the plus of O type ring into the socket, the depth according to the limited line. Plus the steel rod in to the clearance

of the sockets and check the round to ensure the depth according to the depth of the channel of rubber ring.

3.5.5、再次检查锁键槽是否对正，然后将尼龙棒慢慢插入管道的锁键槽内，至尼龙棒沿锁键槽环绕管道一周，在安装完毕前，最好保留尼龙棒的剩余长度。Recheck the lock key channel and plug the nylon stick into the lock key channel slowly and surround the piping. Keep the spare length before the installation is completed.

3.5.6、由于玻璃钢管道尺寸和位号已由玻璃钢管生产厂家定好，因此安装时，必须严格按照厂家给定的位号进行安装。The glass steel pipe would be installed according to dimension and item made by manufacture to avoid mistake.

3.6、阀门安装Installation of valves.

3.6.1、阀门安装前应按设计要求核对型号、规格，并应按介质流向确定阀门的安装方向，填料压盖的压紧螺栓要留有余量。阀门安装时，应处于关闭状态，阀杆及传动装置位置符合设计要求，且动作灵活。

The model and specification of valves should be verified before installation, and the installation direction should be determined according to the flowing direction of the medium. Allowance should be reserved for the pressure bolts in the cover of the filling material. The valves should be shut down when they are installed. The location of valve rod and transmission apparatus should accord with the design requirement and be agile.

3.6.2、阀门伸缩器应同阀门一块安装，安装时伸缩器的定位装置按厂家要求进行调整。

The valve compensator should be installed together with the valve. The positioning apparatus of the compensator should be adjusted as required by the manufacturer.

四、水压试验Hydrostatic test

4.1试压前的准备Preparation

4.1.1、钢管水压试验的管段长度不得超过1000m，试压前应对管段内部进行清理，将泥土及杂物彻底清理干净。

The length of the steel pipe for hydrostatic test cannot exceed 1000m. Yhe inside of the pipe should be cleaned and the earth and rubbish should be completely removed.

4.1.2、试压管段的两端应焊接盲板。试压管段不得采用闸阀做堵板，不得带消火栓、消防水炮和其它易损件进行试压。

Both ends of the test pipe should be welded with pipe sections with blind plate. The pressure test is forbidden with the wearing parts, such as gate valve, hydrant, etc.

4.1.3、试压管段的排水应设在管段的低点，在管段的高点应设排气阀。

The drainage for test pipe section should be set up at the lowest point of the section and air release valve should be set up at the highest point of the section.

4.1.4、试压用压力表采用弹簧管式压力表，压力表的量程为试验压力的1.5倍，精度等级为1.5级，表盘公称直径为150mm，压力表应经检测合格，并在有效期内。且压力表不少于2块。一块放在试压泵处，一块放在远离试压泵处。

The pressure meter used in test adopts corrugate pipe pressure meter whose range is 1.5 times of the test pressure and precision is Grade 1.5. The nominal diameter of the meter panel is 150mm. The pressure meter should be qualified through inspection and valid. At least two pressure meters are needed and one for the hydraulic test pump and the other far away the pump.

4.1.5、试压管段应在低点注水，以利气体排出。

Water should be poured in from the lower points for air releasing. The piping should be dipped in water for 24 hours after being fully filled and then hydrostatic test can be carried out.

4.1.6、水压试验前，除接口外管道两侧及管顶以上不小于500mm，应及时进行回填土，水压试验合格后，应及时剩余部分回填土。Backfill soil in time before the hydraulic test and backfill the other soil after hydraulic test is qualification.

4.2、压力管道水压试验Hydrostatic test for pressure piping

4.2.1对于生活给水管道，在进行水压试验时，应用洁净水进行。对于其它管道，可就近采用从装置临时给水网引水进行水压试验。由于2#路、3#路和4#路管道距离临时给水点较远，因此需要接橡胶临时管进行管道注水，距离超过200米。

Clean water should be used for the hydrostatic tests for all piping sections. If this condition cannot be met, water should be obtained from the water resource designated by the Party A and imported into the test piping section through temporary piping. The rubber temporary pipe are used for the poured water because the 2# road, 3# road and 4# road are far away from the water supply station.

4.2.2、管道水压试验压力为P+0.5且不小于0.9 MPa，其中P为工作压力（MPa）。根据设计图纸所给消防管线工作压力范围为0.8～1.2Mpa,故取最高值试验压力为1.7Mpa。The pressure of pipe hydraulic test is P+0.5 and more than 0.9Mpa, the P is working pressure (MPa).

According to the design drawing, the pressure scope of waterproof pipeline is 0.8~1.2Mpa, the max value test pressure is 1.7Mpa.

4.2.3、试压时采用电动试压泵分级升压，首先升压到0.3MPa进行管道焊口及支墩的检查；无异常现象时再升压到工作压力,对管道系统进行检查；无异常现象时，再升压到试验压力。The motor-operated test pump is used to increase the pressure in stages. First increase the pressure to 0.3MPa and examine the welding joints and pier of the piping; if no abnormal phenomenon is found, increase the pressure to the working pressure and examine the piping system and piers, if still no abnormal phenomenon is found, increase the pressure to the test pressure.

4.2.4、水压升到试验压力后，保持恒压10min，检查焊口及管道系统无异常变形及漏水现象，则管道强度试验合格。水压试验合格后，应立即卸压，将管道里的水排出，然后进行沟槽回填。

When the hydraulic pressure is increased to the test pressure, it should be kept for 10min, and examine whether there is abnormal deformation or leakage in the welding joints and piping system, if no, the piping strength is qualified. Relief pressure after the hydraulic test is qualified, drainage the water from the pipe and backfill the trench.

4.2.5、管道严密性试验采用注水法。在进行严密性试验时，不得有漏水现象。且实际渗水量应小于允许渗水量。压力管道严密性试验允许渗水量见表5the hydraulic pressure test are used for the pipe leakage test. The actual quantity of water seepage would less than the allowed quantity of water seepage. The allowed quantity of water seepage see the following table:

压力管道严密性试验允许渗水量表4 The allowed quantity of water seepage of pressure pipe leakage test table 4

4.2.6、水压试验时，严禁对管道及接口进行敲打或补修，缺陷处应做出标记，卸压后方可修补，修补后的部位经检验合格后，应重新进行管段水压试验。

Knocking or reparation of the piping and joints is strictly forbidden during the hydrostatic test. Mark should be made in the defect location. Reparation can be done only after the pressure is relieved. After the reparation is examined, hydrostatic test should be done again for that piping section.

4.2.7、管道试验升压前管道内的气体应排尽，若升压过程中，发现弹簧管压力表表针摆动、不稳，且升压较慢时，应重新排气后升压。

The air in the piping should be completely discharged before increasing the pressure. If it is found that the point of the corrugate pipe pressure meter swings and is unstable and the pressure increase is implemented too slowly, air should be released again and then pressure is increased.

4.2.8、由于消防管线系统大，加上受工期、到货时间和其它作业影响，故无法进行整体试压，必须分段进行试压。对于部分支线受材料到货计划影响，可能暂时无法安装，因此无法带支线进行试压，根据实际情况，可以考虑二次试压。对于可以进行二次试压的管线，可以先进行主线试压，待主线试压完毕后，进行管沟回填。当支线材料到货后，进行支线安装，然后通水进行整体试压。Subsection pressure test would be executed because the waterproof pipelines system is large and working period and material supplied. Secondary pressure test would be executed because the part of branch material supplied. The pressure test of main pipeline could be executed first and then backfill the trench. Execute the integer pressure test after the branch pipes are installed completely.

4.2.9、分段试压的划分如下：400-FW-1184202、400-FW-1184203、400-FW-1184205、400-FW-1184207、400-FW-1184208、DR7和DR8、DR9和DR10单独进行试压。