预制拱圈式抗滑明洞在滑坡治理中的应用

Abstract: Due to landslide has the characteristics of sudden and destruction, it has a great impact on the normal operation of highway. At present, the main treatment measures are cutting down slope + protection and retaining reinforcement. This paper puts forward two treatment schemes for the landslide at K1530 + 300 of Tianchan highway in Gansu province: precast antislide tunnel + cutting down slope and anti-slide pile + cutting down slope. In terms of treatment effect, anti-slide tunnel can govern the landslide completely, while the governance effect of anti-slide pile is not so well. In terms of construction technique, anti-slide tunnel requires the precast land and high requirements about hoisting technology, while the manual hole digging in the anti-slide pile has more risks than anti-slide tunnel scheme. In terms of the environment impact, the anti-slide tunnel can achieve earthwork balance, while the anti-slide pile scheme has to discard 32 000 m3 , that is not friendly to the environment. In terms of traffic influence, anti-slide tunnel needs traffic control during the arch ring hoisting, which will has certain influence on the highway operation, while the anti-slide pile has less influence as it is constructed outside the highway. The cost of anti-slide tunnel scheme is less than anti-slide pile scheme. Therefore, the anti-slide tunnel + cutting slope scheme is finally selected as the treatment scheme of this landslide. The treatment of this landslide can provide some references for the similar projects. Key words: landslide control; anti-slide pile; anti-slide tunnel; schemes comparis
The Application of Precast Arch Ring Tunnel in the Treatment of Landslide
CAO Xiaoliang1,2 , CAO Liangliang3 (1． CCCC First Highway Consultants Co． , Ltd． , Xi’an 710075, China; 2． CCCC RUITONG Road and Bridge Maintenance Technology Co． , Ltd． , Xi’an 710075, China; 3． NO． 9 Metallurgical Construction Group Co． , Ltd． , Hanzhong Branch in Hanzhong, Hanzhong 724200, China)
1滑坡参数通过室内试验获取滑坡各地层物理力学参数结果如表1所示滑动面抗剪强度对边坡稳定性和剩余下滑力发挥决定性影响本工程通过工程类比反算室内重复剪切试验综合确定滑动面的抗剪强度结果如表2所示
第 17 卷 第 1 期 2020 年 2 月
现代交通技术 Modern Transportation Technology
Vol． 17 No． 1 Feb． 203
(1． 中交第一公路勘察设计研究院有限公司,西安 710075;2． 中交瑞通路桥养护科技有限公司,西安 710075; 3． 九冶建设有限公司汉中分公司,汉中 724200)
摘 要: 滑坡突发性和破坏性强,对公路的正常运营影响较大,目前主要的治理措施为放缓边坡 + 坡面防护和支挡 加固。 本文针对甘肃天巉公路 K1530 + 300 处隧道口滑坡,提出抗滑明洞 + 放缓边坡和抗滑桩 + 放缓边坡两种方案。 在治理效果方面,抗滑明洞方案可以彻底治理滑坡,而抗滑桩方案治理效果稍差;施工工艺方面,抗滑明洞施工方案 需要预制场,对吊装技术要求较高,抗滑桩方案人工挖孔安全风险较高;环境方面,抗滑明洞方案能够做到土方平衡, 抗滑桩方案需要弃方 3． 2 万 m3 ,对环境影响较大;保通需求方面,抗滑明洞方案需要在拱圈吊装时管制交通,对公路 运营有一定的影响,抗滑桩方案施工位于公路边坡上,对交通影响小;工程造价方面,抗滑明洞方案造价较抗滑柱方 案低。 因此,选取抗滑明洞 + 放缓边坡方案作为本滑坡的治理方案。 关键词: 滑坡治理;抗滑桩;抗滑明洞;方案对比 中图分类号: U418． 5 文献标识码: A 文章编号: 1672 9889(2020)01 0001 05