高速铁路重点地段基础变形沉降监测技术应用及数据分析

受地面沉降和铁路构筑物自身沉降变形如工后沉降、不均匀沉降和过渡段差异沉降等诸多因素影响,高速铁路部分线路地段在运营后发生区域性沉降或抬升变化。对于发生区域性沉降或抬升变化的地段要进行重点地段基础变形沉降监测。本文采用二等附合水准路线中视法对某高速铁路有区域抬升变化的地段进行多期重点地段基础变形沉降监测,并利用CPⅢ高程测量方法对监测出的变化进行验证,根据监测结果及验证结果分析该监测方法能够准确反映重点地段的变形情况,为设备管理单位掌握线路变形情况和维修、养护提供重要的数据依据。

Settlement monitoring system of pile-group foundation

In order to realize information construction on settlement of pile-group foundation of Sutong Bridge, the monitoring instruments of high-precision micro-pressure sensor and hydrostatic leveling and settlement profiler were integrated synthetically. A set of practical multi-scale monitoring system on settlement of super-large pile-group foundation in deep water was put forward. The reliable settlement results are obtained by means of multi-sensor data fusion. Finite element model of pile-group foundation is established. By analysis of finite element simulated calculation of pile-group foundation, rules of settlement and uneven settlement obtained by monitoring and calculation results are coincident and the absolute error of settlement between them is 4.7 mm. The research shows that it is reasonable and feasible to monitor settlement of pile-group foundation with the system, and it can provide a method for the same type pile-group foundation in deep water.

成都来福士广场施工过程监测及分析

成都来福士广场为超高层多塔复杂结构,施工周期长,受到的影响因素如施工荷载、气象环境、风荷载和基础不均匀沉降等复杂多变。为了尽力避免各种不利因素引起的质量问题,对该项目进行了多项施工过程监测,包括基础沉降监测、上部特殊结构变形监测、关键构件应力监测和特殊楼层的舒适度监测。通过施工过程监测和有限元模拟分析,有效地反映了施工过程中各阶段结构响应和状况,为进一步施工作业提供了可靠和有效的数据支撑。