排水沟设计说明

排水沟设计说明
Design n
I。

Project Overview
This project is a drainage ditch and road project located in XXX。

The route runs from north to south。

and the length of the drainage ditch is XXX.
II。

Design Basis and Standards
1.Design Basis
1) Electronic maps provided by the owner;
2) XXX.
2.Design Standards
1) "XXX" (JTG B01-2003);
2) "XXX" (JTG D20-2006);
3) "XXX" (JTGT D33-2012);
4) "XXX" (GB -2002);
5) "XXX" (JTGD61-2005);
6) "XXX" (JTG/TD65-04-2007);
7) "General Design XXX" (JTGD60-2004).
III。

Main Technical Standards
1.The road for this project is a n access road.
XXX
The length of XXX Village-level road project is approximately 616.71m.
1.Plan Line Design
The road is arranged on the right side of the existing retaining wall。

and some of the ditches need to be XXX is built on the right side of the road。

XXX.
2.Plan n Design
The main n of the entire route is a T-shaped n.
3.n Design
According to the requirements of the n unit。

the roadbed width of this project is 3.5m.
V。

XXX
1.XXX
The roadbed is designed with a 1.5% one-way slope for natural drainage.
1) XXX: 25 years.
2) n of dry and wet types of roadbed: according to the wet standard in zone IV-2.
3) Natural geographical ns
The area XXX of Central Asia。

with a warm and humid climate。

abundant rainfall。

distinct seasons。

sufficient sunlight。

and a XXX is from March to May。

with an average temperature
of 16.9℃ and a n of 438mm。

The d from June to September is the high season of light and humidity。

with XXX and floods。

an average temperature of 26.9℃。

and a n of 820mm。

The d from October to November is less rainy but sunny。

with an average temperature of 17℃ and a n of 131mm。

The d from December to February of the next year is the low-value d of light and humidity。

and some years are affected by cold waves。

The lowest temperature is -4.5℃。

the highest temperature is 37.5℃。

and there are 271 frost-free days per year。

The end of the frost d is generally in mid-February。

and the number of snowfall days
throughout the year is about 10 days。

The climate in this area is classified as zone 1-4-2 based on the average high and low XXX 30 years.
4) General Roadbed Design
As the supporting layer of the pavement structure and vehicle load。

the roadbed must be compact。

uniform。

and stable。

The main measures and XXX:
① During the n of general road ns。

loose fill soil。

cultivated soil。

or domestic garbage soil on the surface should be cleared。

and then compacted with a roller to make the XXX and high density and the XXX.
本工程采用宕渣填筑路基，低填路段和挖方路段路基宕渣厚度≥50cm，分层填筑并按照压实度要求进行压实。

路基填筑前需要确定填料的最佳含水率，以确保路基的压实效果和压实度。

排水沟工程采用浆砌块石挡墙。

石料应选用质地均匀、抗压强度不低于30Mpa且具有耐冻和抗侵蚀性能的硬质石料。

块石应大致方正、上下面大致平整，厚度不小于20cm，宽度和长度约为厚度的1～1.5倍和1.5～3倍。

砌筑时应敲去尖锐
突出部分，放置平稳，用小石子填塞孔隙，分层错缝搭叠砌筑，砂浆填塞应饱满。

墙体砌筑时应分皮卧砌，保证砌体密实，外坡面平整顺直美观。

挡土墙地基承载力要求达到100pa以上，当地基承载力不满足要求时，应对基础换填50cm厚天然砂砾
处理。

挡土墙采用7.5号砂浆砌筑，勾缝用砂浆比砌筑用砂浆
标号提高一级。

圆管涵采用平口接头填缝，节间缝隙采用沥青浸过的麻絮填塞，外面圈裹两道满涂热沥青的油毛毡或四层沥青浸制麻布，粗铅丝绑扎固定。

基础采用C25混凝土，基础底面铺设20cm
厚的换填垫层。

基底换填材料的选用要求：当基底应力
≤200Kpa时，换填材料可采用中粗砂；当基底应力>200Kpa时，换填材料要求采用级配碎石。

当地基容许承载力不满足要求时，应根据实际情况采用适当的方法对涵洞底地基进行加固处理，以达到设计要求的容许承载力。

本图适用于圆管涵纵坡≤3%的
情况，当纵坡>3%时，应另行设计，充分利用地形和地质条件，做到经济合理，并注意结构的稳定性。