大型滑坡施工期监测系统设计及测试成果分析

八尺门滑坡是福建省内迄今所发生的最大公路滑坡，监测是滑坡动态设计和信息化施工的重要内容。在该滑坡施工治理过程中建立了一个大型的滑坡监测系统，为此详细介绍了监测系统设计、现场监测布设及测试方法，开展了包括地表位移、滑体和抗滑桩深部水平位移、抗滑桩土压力、锚索受力、裂缝及地下水位变化等多项目的监测，基于对典型监测成果的综合分析，给出了滑坡的滑动方向、滑面位置、滑坡位移变化、锚索受力及地下水位变化情况等，为滑坡动态设计提供了直接依据，并确保了现场施工和滑坡上的居民安全，有效节约了工程成本。研究成果为相关的滑坡监测工程提供了重要的借鉴意义。

Monitoring system design and test results analysis of a large scale landslide during remedial construction

Bachimen landslide, located in Fujian Province, China, is the current largest landslide occurred during the highway construction; monitoring is the important content among landslide dynamic design and information construction. A large scale monitoring system is built in this landslide, this paper discusses the monitoring system design, in situ layout of monitoring facilities and testing methods in detail. Monitoring items consist of surface displacement, horizontal displacement of landslide body and anti-sliding piles, soil pressure behind anti-sliding piles, tensile force of anchor cables, cracks and underground water level. Based on the synthetic analysis of typical monitoring results, sliding direction, slip surface, displacement of landslide body, the variation of anchor cables’ force and underground water level are all obtained, which provides direct proofs not only for dynamic remedial design, but also for the safety construction. Furthermore, the monitoring system makes it possible for the landslide deformation and residents’ on the landslide are all far away from abnormal serious condition. In the result, the remedial construction keeps safe and engineering cost is greatly saved, which will provide significant reference for those relevant landslide monitoring projects.