软基河道中水建筑物基坑支护方案比选分析

Comparison and Analysis of Foundation Pit Support Scheme for Water-based Buildings in Soft Foundation Riversides

在软基的河道中建设水工建筑物时,经常会遇到基坑的开挖,这些基坑有地质条件差、深度深、工期紧、发生事故后影响大的特点,是建设单位在项目管理过程中重点考虑的问题。以杭州市余杭区TX河道中橡胶坝基坑支护工程为实例,根据工程特点,提出抛石镇压方案、搅拌桩地基加固方案和灌注桩支护方案,通过经济技术综合对比,采用灌注桩支护方案。同时,结合工程实际情况,提出双排灌注桩基坑支护与橡胶坝岸墙结合,既减少了对两岸堤脚的开挖,提高了安全性,又使临时工程与永久工程结合,降低了投资。

In the construction of hydraulic structures in the soft river, the foundation pit is often excavated. Management issues focused on the issue. Based on the engineering characteristics, the scheme of the riprap suppression scheme, the reinforcement foundation of the mixing pile and the support scheme of the pile are put forward. Through the comprehensive comparison of the economic technology, the casting pile Support program. At the same time, combined with the actual situation of the project, it is proposed that the combination of double-row piles and the foundation of the rubber dam can reduce the excavation of the embankment on both sides, improve the safety and make the temporary engineering combined with the permanent project investment.