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Application of Water-proof Curtain with High-pressure Injection Concrete Piles in Foundation Pit

机译：防水窗帘在基坑高压注射混凝土桩的应用

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摘要

This paper introduces a design program for supporting of deep foundation pit through the actual example for Beijing Moisten the world Center project to solve the difficulties of high water content in foundation soil, sensitiveness to surroundings, and difficult control of quick sand and flowing mud in the process of supporting of foundation pit. This program adopts a supporting system with upper soil nailing wall and lower pre-stressed anchor pile and a comprehensive water-proof curtain (Retaining piles + Long spiral high pressure jet grouting & mixing piles) to effectively solve the above difficulties. It is indicated through actual monitoring that displacement and settlement of foundation pit meet the specification and design requirements with excellent water-proof effect. The successful application of this program provides a reference for foundation pit engineering with rich underground water, especially for engineering at hard soil layer and stratum with sand and gravel that are apt to the formation of cement-soil grouting and mixing piles, as well as engineering with limitation on dewatering of foundation pit.
机译：本文介绍了设计方案，通过对北京润世界中心项目实际例子深基坑支护，解决了高水分含量在地基土的困难，敏感到环境和快速砂很难控制和流动的泥浆的基坑支护处理。该程序采用与上土钉壁和下预应力锚桩和全面的防水幕（护桩+长螺旋高压旋喷＆搅拌桩）有效地解决了上述困难的支撑系统。它是通过实际监测表明，位移和基坑满足具有优异的防水效果的规范和设计要求的解决。这一方案的成功应用提供了丰富的地下水基坑工程的参考，尤其是在硬土层和地层，砂石是容易的水泥土灌浆和搅拌桩形成工程，以及工程对基坑降水的限制。

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