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【摘 要】本文主要介绍,每一种基坑支护方案都有其优缺点,对于深基坑在特有的环境下往往难取其中的一种,一般的情况下深基坑的支护都是联合支护的组合。本文是一个深基坑边坡支护的实例,介绍的是联合支护方案在宁夏回族自治区银川市新材富汇项目中的应用情况。从设计、施工、监测方面进行分析和总结,对深基坑边坡联合支护在银川地区积累一些有益的经验,对类似工程的支护有着较好的借鉴意义。
【关键词】深基坑;边坡支护;灌注桩;高压旋喷装;锚管、土钉墙、监测
Deep foundation combined support in the practical application of engineering practice
Hou Zhan-xiu
(Ningxia new materials Real Estate Development Co., Ltd Yinchuan Ningxia 750001)
【Abstract】This article introduces each foundation pit support program has its advantages and disadvantages for the deep foundation in the unique environment is often difficult to take one of them, the deep excavation support in the general case are combined supportcombination. This article is a deep pit slope supporting the instance described in the application of the combined support program in the project of new material rich exchange of Yinchuan City, Ningxia Hui Autonomous Region. From the design, construction, monitoring, analysis and summary, the combined support of deep foundation pit slope accumulated some useful experience in Yinchuan, the support of similar projects have a better reference.
【Key words】Deep excavation;Slope support;Pile;High pressure jet grouting installed;Anchor pipe;Soil nail wall;Monitoring
1. 引言
20世纪八十年代中期特别是进入九十年代以后,高层和超高层建筑项目大增。在城市建设不断发展的同时,各种地下建筑物也迅速兴建,如地铁、地下商场及高层建筑的地下人防、停车场。地下工程往大深度方向发展给高层建筑基坑支护施工带来许多困难。土钉墙支护在1979年国际会议中对其经济性和安全性均予以肯定。我国80年代将其引入国内,主要在治理滑坡、隧道支护等大型土木工程中应用。该项技术用于高层建筑基坑开挖是进入90年代才用于工程实际的。近十多年,我省高层建筑发展很快,地下空间的充分利用,促进了深基础的发展。在城市深基坑边坡支护中,其周围环境和地质条件普遍较为复杂,基坑周围建筑物密集,有的紧靠重要市政公路和市政设施,如各种电力、通信、煤气、上下水管线等,基坑周围建筑物密集,基础种类多,地质条件变化较大,故深基础工程已是设计及施工的热点和难点。银川市新材富汇项目工程基坑支护,由于基坑周围建筑物较密集,市政设施复杂,施工作业面狭小等,故在银川市区颇具代表性。本文对该工程支护加固方法及设计指导思想作一介绍,希望对于类似工程的边坡支护具有较好的借鉴意义。
【关键词】深基坑;边坡支护;灌注桩;高压旋喷装;锚管、土钉墙、监测
Deep foundation combined support in the practical application of engineering practice
Hou Zhan-xiu
(Ningxia new materials Real Estate Development Co., Ltd Yinchuan Ningxia 750001)
【Abstract】This article introduces each foundation pit support program has its advantages and disadvantages for the deep foundation in the unique environment is often difficult to take one of them, the deep excavation support in the general case are combined supportcombination. This article is a deep pit slope supporting the instance described in the application of the combined support program in the project of new material rich exchange of Yinchuan City, Ningxia Hui Autonomous Region. From the design, construction, monitoring, analysis and summary, the combined support of deep foundation pit slope accumulated some useful experience in Yinchuan, the support of similar projects have a better reference.
【Key words】Deep excavation;Slope support;Pile;High pressure jet grouting installed;Anchor pipe;Soil nail wall;Monitoring
1. 引言
20世纪八十年代中期特别是进入九十年代以后,高层和超高层建筑项目大增。在城市建设不断发展的同时,各种地下建筑物也迅速兴建,如地铁、地下商场及高层建筑的地下人防、停车场。地下工程往大深度方向发展给高层建筑基坑支护施工带来许多困难。土钉墙支护在1979年国际会议中对其经济性和安全性均予以肯定。我国80年代将其引入国内,主要在治理滑坡、隧道支护等大型土木工程中应用。该项技术用于高层建筑基坑开挖是进入90年代才用于工程实际的。近十多年,我省高层建筑发展很快,地下空间的充分利用,促进了深基础的发展。在城市深基坑边坡支护中,其周围环境和地质条件普遍较为复杂,基坑周围建筑物密集,有的紧靠重要市政公路和市政设施,如各种电力、通信、煤气、上下水管线等,基坑周围建筑物密集,基础种类多,地质条件变化较大,故深基础工程已是设计及施工的热点和难点。银川市新材富汇项目工程基坑支护,由于基坑周围建筑物较密集,市政设施复杂,施工作业面狭小等,故在银川市区颇具代表性。本文对该工程支护加固方法及设计指导思想作一介绍,希望对于类似工程的边坡支护具有较好的借鉴意义。