滨海岩溶地层深基坑桩锚支护结构施工技术  

Stability of a Metro Deep Excavation in Coastal Karst Stratum

作　　者：杨福刚 邵丕纯 徐怀中 刘景旭 任昆 白海峰 YANG Fugang;SHAO Pichun;XU Huaizhong;LIU Jingxu;REN Kun;BAI Haifeng(Dalian Branch of China Railway ninth Bureau Group Co.,Ltd.,Dalian 116699;School of Civil Engineering Dalian Jiaotong University,Dalian 116028)

机构地区：[1]中铁九局集团有限公司大连分公司,辽宁大连116699 [2]大连交通大学土木工程学院,辽宁大连116028

出　　处：《土工基础》2024年第4期582-586,共5页Soil Engineering and Foundation

摘　　要：滨海岩溶地层地下水位高、稳定性差,地铁车站基坑的建设难度较高。为提高地铁深基坑过程稳定性及安全性,以大连地铁5号线甘井子站基坑工程为例,针对滨海岩溶复杂地质条件及周边建筑、管线密集等特点,分析了桩锚支护结构的施工方法与施工工艺。根据现场监测数据,分析了围护桩侧向位移、基坑周边地表及建(构)筑物不均匀沉降发展趋势。在深基坑施工过程中,支护结构稳定安全,地表及周边建(构)筑物不均匀沉降处于可控范围,桩锚支护结构具有较强的适应能力与可靠度,可为岩溶地层地铁车站工程的建设提供参考。The high groundwater level and the poor stability in the coastal karst strata are frequently encountered.It is difficult to construct the foundation pit of the subway station.In order to improve the stability and safety of the deep foundation pit process of the subway,taking Ganjingzi Station foundation pit project of Dalian Metro Line 5 as an example,this paper analyzes the construction method and technology of pile-anchor support structure according to the complicated geological conditions of coastal karst and the characteristics of surrounding buildings and pipelines.Based on the field monitoring data,lateral displacement of retaining piles,the development of uneven settlement of ground and around building(structures)was analyzed.During the construction of deep foundation pit,the supporting structure is stable and safe,the uneven settlement of the surface and surrounding buildings(structures)is within the controllable range,and the pile anchor supporting structure has strong adaptability and reliability,which can provide a reference for the construction of subway stations in karst strata.

关 键 词：深基坑 岩溶 桩锚支护 施工技术 灰色理论 

分 类 号：TU473[建筑科学—结构工程]