导管引流排水在基坑局部降水中的应用

Application of drainage pipe in local dewatering of foundation pit

随着现代科技的进步以及城市建设的不断发展,在有限的土地资源开发利用中,不得不将视角转入高层和地下空间,这直接导致建筑物基础的埋置深度越来越深,工程建设在含水层中容易发生土层塌陷,基坑失稳,临近建筑物构筑物管线不均匀沉降,造成极大安全隐患和经济损失,同时鉴于不同地质条件下地下水的性质差异较大,对于不同的场地地质情况,需采取相应适宜的降排水方法,结合工程实例,针对局部灰岩分布区的岩溶裂隙水,采取了一种导管引流排水方法,将地下水引出地下室外墙范围外再进行集中抽排,该方法既能提高施工效率,又保证了底板混凝土的连续浇筑。

With the progress of modern science and technology and the continuous development of urban construction,in the development and utilization of limited land resources,the perspective has to be shifted to the high-rise and underground space,which directly leads to the deeper and deeper burial depth of building foundation.The engineering construction is prone to soil layer collapse in the aquifer,foundation pit instability,uneven settlement of pipelines adjacent to buildings and structures,causing great security risks and economic losses,at the same time,in view of the large differences in the nature of groundwater under different geological conditions,appropriate dewatering and drainage methods should be adopted for different site geological conditions.In this paper,combined with engineering examples,a conduit drainage method is adopted for karst fissure water in local limestone distribution area to lead the groundwater out of the outer wall of the basement for centralized pumping and drainage,this method can not only improve the construction efficiency,but also ensure the continuous pouring of bottom slab concrete.