基于工程实例的基坑内支撑快速拆除施工工艺研究

Research on Construction Technology of Rapid Demolition of Foundation Pit Internal Support Based on Engineering Examples

为解决内支撑换撑方式对工期的影响的难题,通过采用一种间隔设置的传力换撑梁技术,根据基坑受力特点对传力换撑梁进行了相应的配筋设计,在保证安全和质量的前提下缩短了内支撑梁拆除周期,对内支撑拆除施工提供了一种经济,可靠的施工工艺,减少了混凝土的使用量,既符合环保要求,又可以使换撑与楼板同步施工,从而缩短工期,实现快速拆撑,通过对具体工程进行施工,验证该方案可行,为今后类似工程提供参考。

In order to solve the problem of the influence of the internal support replacement mode on the construction period, by using a force transfer and support beam technology with interval settings, the corresponding reinforcement design of force-transmitting and bracing-changing beams is carried out according to the stress characteristics of foundation pit. On the premise of ensuring safety and quality, the dismantling period of the internal support beam is shortened, and an economical and reliable construction method is provided for the internal support dismantling construction, which reduces the amount of concrete used, meets the requirements of environmental protection, and enables the support replacement and the floor slab to be constructed synchronously, thus shortening the construction period and realizing rapid removal bracing. Through the construction of specific projects, the feasibility of the scheme is verified, which provides a reference for similar projects in the future.