论文部分内容阅读
随着一大批深大基坑的不断涌现,常规的顺作法与传统的逆作法已经不能同时满足深大基坑在安全、环境保护、工期等各方面的要求。本文借助某一深大基坑的工程实践,引进主体结构与支护结构相结合的新形式“大开口顺逆复合工法”这一全新的设计施工理念,以解决该基坑工程中采用顺作法需要大量的临时支撑和栈桥、支撑刚度相对较小、施工和拆除支撑消耗时间长等缺点,以及逆作法存在施工速度慢、作业环境差、技术要求高、适用性限制等问题。工程实践表明,对于深大基坑,顺逆复合工法可以解决业主对工期方面的要求,能使整个或局部地下室尽快出标高±0.000m;在复合工法基础上,引进了大开口的理念,完全改变了常规的地下施工流程,大大地改善了地下作业的条件,提高了地下施工速度;同时,也满足了周边环境的保护要求。
With the continuous emergence of a large number of deep foundation pits, the conventional method of compliance and the traditional method of inversion can not meet the requirements of deep foundation pit in safety, environmental protection and construction period at the same time. In this paper, with a deep foundation pit engineering practice, the introduction of the main structure and the support structure of the new form of combination of “large openings along the inverse complex method” of this new design and construction concept to solve the pit project Shun approach requires a lot of temporary support and trestle, the support stiffness is relatively small, the construction and removal of support for a long time and other shortcomings, as well as the reverse operation of the existence of slow construction, poor operating environment, high technical requirements, applicability restrictions and other issues. Engineering practice shows that for the deep pit, the combination of Shun and You method can solve the owner’s requirements on the construction period, make the whole or partial basement as soon as possible standard ± 0.000m; on the basis of the composite method, the introduction of a large opening concept, complete Changed the conventional underground construction process, greatly improving the conditions of underground work, improve the speed of underground construction; the same time, also meet the protection requirements of the surrounding environment.