古城墙周围多个建筑物共同影响下复杂深基坑监测分析

Monitoring Analysis of Complex Deep Foundation Pit under the Influence of Multiple Buildings

本文对西安市南门外综合提升改造工程深基坑进行监测研究,基坑四周分别紧挨护城河、古城墙、地铁及市政道路等建筑物。监测项目包括:坑壁沉降、基坑周边建筑物沉降及倾斜、基坑边坡加固使用的钢管桩的桩顶位移、桩身位移、锚索拉力、地下水位及基坑壁侧向土压力。通过监测数据整理分析,及时掌握和了解支护结构和周边建筑物的安全状态,为工程施工人员创造安全的施工条件;同时证实该基坑的支护方案的可靠性,为其他工程提供借鉴。

In this paper, the monitoring research on deep foundation pit of comprehensive lifting and rebuilding project outside Nanmen in Xi′an city is carried out. The monitoring items include pit wall settlement, settlement and inclination of buildings around foundation pit. Pile top displacement and pile body displacement of steel pipe pile are used in slope reinforcement of foundation pit. Anchor cable tension, underground water level and lateral earth pressure of foundation pit wall are monitored. Through monitoring data collation, analysis and summary of the rules are done, timely grasp and understand the supporting structure and surrounding buildings, and eliminate the potential safety hidden danger in order to prevent the occurrence of danger. At the same time, the reliability of the supporting scheme of the foundation pit is proved, which can be used for reference for other projects.