基坑回弹再压缩对于减小主裙差异沉降的有利效应

王涛; 刘金砺

基坑回弹再压缩对于减小主裙差异沉降的有利效应 English Version

王涛,
刘金砺

中国建筑科学研究院,北京 100013

基金项目: 建设部科技项目( 97-07-02)；“十一”五国家科技支撑计

详细信息

作者简介:
王涛 (1978 – ) ,男,辽宁鞍山人,工学博士,副研究员,主要从事桩基工程研究。

中图分类号: TU473
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出版历程
- 收稿日期: 2011-08-02
- 发布日期: 2011-12-06

Beneficial factor of pit resilience recompression in view of reducing differential settlement of main building and podium

China Academy of Building Research, Beijing 100013, China

摘要

摘要: 带裙房高层建筑建成后地下室和裙房一般仍处在补偿或超补偿状态,此时通过地基 ( 桩土 )- 基础 - 上部结构共同作用分析,往往得出主楼和裙房的差异沉降过大,必然导致设缝或通过沉降后浇带来弥补差异沉降。沉降观测资料得出主楼和裙房的差异沉降并非计算值那样大。通过对主裙不同基础形式的高层建筑差异沉降的实测分析指出：在正常使用状态下其地基回弹变形均因受载再压缩而产生沉降,且再压缩变形在不大的竖向荷载下便出现,并接近于回弹量,从而使得主裙差异沉降大幅度减小。主裙连体高层建筑基坑底的回弹再压缩是减小主裙差异沉没降的有利因素,埋深越大,回弹再压缩减小差异沉降的效应越明显。
- 桩基础 /
- 基坑回弹 /
- 再压缩 /
- 主裙差异沉降 /
- 桩身压缩
Abstract: The basement of high-rise building with podium is under the state of compensated foundation or super-compensated foundation. The large different settlement of the main building and podium often results from the interaction calculation of subsoil (pile & soil)-foundation-superstructure. It causes to interposing settlement joint and settlem ent post pouring concrete belt in order to repair the differential settlement. But the observed settlement results in a small difference of the main building and podium. Under the serviceability state the subsoil settlement is pointed out due to recompression of pit resilience through the measured differential settlement analysis of different foundation types of the main building and podium. The recompression settlement can be produced under the less vertical load and approach the pit resilience value which substantially reduces the differential settlement of the main building and podium. The pit resilience recompression is a beneficial factor in view of reducing the differential settlement of the main building and podium. The larger depth of embedment, the more obvious this effect.
- pile foundation /
- pit resilience /
- recompression /
- differential settlement of main building and podium /
- pile shaft compression

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参考文献(6)

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