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廖文来, 张君禄, 陈晓文, 段峰虎, 黎兴. 湛江湾厚砂层深挖竖井结构施工监测分析[J]. 岩土工程学报, 2014, 36(zk2): 460-464. DOI: 10.11779/CJGE2014S2080
引用本文: 廖文来, 张君禄, 陈晓文, 段峰虎, 黎兴. 湛江湾厚砂层深挖竖井结构施工监测分析[J]. 岩土工程学报, 2014, 36(zk2): 460-464. DOI: 10.11779/CJGE2014S2080
LIAO Wen-lai, ZHANG Jun-lu, CHEN Xiao-wen, DUAN Feng-hu, LI Xing. Monitoring analysis of structural construction of deep thick sand shaft in Zhanjiang Bay[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(zk2): 460-464. DOI: 10.11779/CJGE2014S2080
Citation: LIAO Wen-lai, ZHANG Jun-lu, CHEN Xiao-wen, DUAN Feng-hu, LI Xing. Monitoring analysis of structural construction of deep thick sand shaft in Zhanjiang Bay[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(zk2): 460-464. DOI: 10.11779/CJGE2014S2080

湛江湾厚砂层深挖竖井结构施工监测分析

Monitoring analysis of structural construction of deep thick sand shaft in Zhanjiang Bay

  • 摘要: 为掌握施工期竖井支护结构的内力发展及分布情况,指导竖井土方开挖及衬护施工。在竖井支护结构不同高程和不同方向的受力主筋上安装钢筋计量测钢筋应力,从而监控施工期支护结构内力的变化。监测成果表明,施工期竖井支护结构主要表现为受压状态,同高程水平环向结构应力大于竖向,地下连续墙中部结构应力大于下部,内衬墙下部水平环向结构应力大于中部;逆作法按6 m一段土方开挖和支护衬砌,施工至第五、六层时结构受力最大,计算分析结构受力安全系数在允许范围内。监测成果为竖井的开挖衬护施工提供指导,亦可为其它类似竖井工程的监测、设计和施工提供参考。

     

    Abstract: To master the development and distribution of internal forces in the shaft structure to guide earth excavation and lining construction, dynamometers are installed on the reinforcement at different elevations in different directions in the shaft structure to measure the force so as to monitor changes of the internal forces in the shaft structure during the construction period. The monitoring results show that the shaft structure is mainly in a compressed state during the construction period. The circumferential pressure of the shaft structure is greater than the vertical one at the same elevation. The structural stress in the center of diaphragm wall structure is greater than that in the substructure, and the circumferential pressure in the substrucure of the lining wall is greater than that in the center. The earth excavation and lining construction is performed according to the section of six meters in length. The structurale force is the maximum when constructed to the fifth and sixth floor. The calculated results show that the safety factor of structure is within the allowable range. The monitoring results provide guidance for the earth excavation and lining construction, and they also provide a reference for the monitoring, design and construction of other similar shafts.

     

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