堆山造景工程软基失稳原因及处理方案研究

针对苏州某堆山造景工程，在堆载施工过程中，软基发生失稳破坏，需要进行事故分析及地基加固方案选择。运用有限元方法，分析软基失稳原因，并对抗滑水泥土搅拌桩墙方案、堆载下布置水泥土搅拌桩复合地基方案分别进行了分析。分析结果表明:抗滑水泥土搅拌桩墙方案对地基整体稳定性提高作用不大；水泥搅拌桩复合地基方案能确保工程安全。为了安全采用了水泥搅拌桩复合地基方案。

Study on Failure Causes and Treatment of Soft Soil Foundation in Piling up Hill for Making Scenery Project

In relation to a pilling up hill for making scenery project in Suzhou, the soft soil foundation was instable during piling construction, thus the accident analysis and the foundation reinforcement selection were required. With FEM, the failure causes was analyzed, and the schemes of anti-sliding cement-soil mixing pile wall, and composite foundation with cement-soil mixing piles arranged beneath the piling were studied respectively. The results show that the anti-sliding cement-soil mixing pile wall plays a minor role in increasing overall stability of the foundation; while the cement mixing pile composite foundation may ensure the project safety. Therefore, for the sake of the safety, cement mixing pile composite foundation shall be used.