深厚杂填土基坑位移控制设计与施工技术

孙剑平; 邵广彪; 江宗宝

深厚杂填土基坑位移控制设计与施工技术 English Version

(1.山东建筑大学土木学院，山东济南 250101；2. 山东建大工程鉴定加固研究所，山东济南 250014)

详细信息

作者简介:
孙剑平(1963– )，男，山东临沂人，教授，主要从事基坑工程、地基基础加固和建筑物纠倾设计与研究工作。

中图分类号: TU473
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出版历程
- 收稿日期: 2012-11-12
- 发布日期: 2012-11-12

Design and construction technology of displacement control in deep miscellaneous fill foundation pits

( 1. School of Civil Engineering, Shandong Jianzhu University, Ji'nan 250101, China; 2. Institute of Engineering Identification and Reinforcement of Shandong Ji'anda, Ji'nan 250014, China)

摘要

摘要: 杂填土场地具有无规划堆积、成分复杂、性质各异等特点，其黏聚力和内摩擦角数值较低，在基坑支护工程中极易产生变形和沉降。济南某工程场地为建筑及生活垃圾回填场地，回填年限约30 a，基坑开挖处杂填土厚度约为18～20 m，距坡顶边线3.0 m有毛石挡墙一道，毛石挡墙外侧地面高出基坑坡顶约3.0～3.5 m，由于该基坑需垂直开挖，开挖深度约11 m，基坑变形对毛石挡墙及外侧地面和道路的影响较明显，需对该深厚杂填土基坑进行位移控制设计。充分考虑该基坑工程地质及周边环境后，采用桩锚支护方案，同时结合主动区和被动区注浆加固，达到位移控制目标。通过基坑监测数据，该基坑位移控制取得理想效果，可为相似工程地质的基坑支护工程提供可靠的技术参考。
- 杂填土 /
- 基坑 /
- 位移控制 /
- 主动区加固 /
- 被动区加固
Abstract: Displacement and settlement are easily generated in foundation pits at miscellaneous fill site because of arbitrary fills, component complexity and heterogeneous characteristics and have lower cohesive force and internal friction angle. There is a foundation pit with deep miscellaneous fill in Jinan. The fills are construction wastes and domestic refuse for 30 years and the depth is up to 18~20 m. The pit needs to be excavated to more than 11 m in depth. There is a freestone retaining wall 3.0 m away from the slope top and the wall is 3.0~3.5 m higher than the slope crest. Design of displacement control is required in deep miscellaneous fill site due to damages of freestone retaining wall and road induced by large deformation of the pit. According to engineering geology and surrounding environment, the pile-anchor support is used and the reinforcement in active and passive zones are taken into accounted simultaneously. Through the monitoring data, the displacement control of the pit achieves better results, and it may provide reference for similar projects.
- miscellaneous fill /
- foundation pit /
- active zone reinforcement /
- passive zone reinforcement /
- undefined

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参考文献(4)

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