某工程坑中坑塌滑原因分析及加固设计

基坑支护结构设计中,坑中坑的设计直接影响到基坑支护结构的安全和经济,况且不少基坑支护结构的工程事故与坑中坑的不合理设计密切有关。结合某土钉墙基坑支护结构失稳的工程实例,分析了基坑支护结构失事的根本原因,提出了基坑支护结构的加固设计方法,同时也提出了基坑支护结构设计中坑中坑的设计方法,研究了基坑支护结构与坑中坑之间的相互制约和相互影响。研究表明,坑中坑对地下室基坑支护结构的整体稳定性影响较大,而基坑支护结构对坑中坑中的支护桩的内力影响相对较小。

Landslide analysis and reinforcement design of the pit-in-pit

In the design of pit support structure, the design of the pit-in-pit had a direct impact on security and economy of the support structure. Furthermore, a few of the excavation support structure accidents were closely related to unreasonable design of the pit-in-pit. Taking a soil nailing wall instability for example, the fundamental reason for the crash of the excavation support structure was analyzed. The method of reinforcement design was developed; but also the design method of the pit-in-pit was put forward. Mutual control and mutual influence between the foundation pit and the pit-in-pit were studied. Research shows that: the pit-in-pit of the basement foundation pit has a greater impact on the whole stability of the support structure; while the foundation pit support has a relatively smaller impact on the internal forces of the supporting piles in the pit-in-pit.