高密度岩溶强烈发育地区全套管灌注桩施工技术

Construction Technology of Tube Perfusion Pile in High Density Karst Area

随着城市现代化步伐的前进,建设用地日益狭小,对项目周边地基沉降及土体变形控制较严格,而我国南方建设项目多位于石灰岩洼地水文地质区,场地内基岩为石灰岩,岩面起伏变化较大,且岩溶发育强烈,如何既保证周边项目地基稳定又保证桩基施工质量和工期,为该类型施工建设的难题。以广州市某广场基础施工为例,详细描述了高密度岩溶强烈发育地区全套管灌注桩施工技术,安全可靠,具有广泛的推广意义。

With the advancement of urban modernization,the construction land is becoming increasingly narrow,and the foundation settlement and soil deformation control around the project are stricter.However,the southern construction projects in China are mostly located in the limestone depression hydrogeological area.The bedrock in the site is limestone,and the rock face changes.Larger,and the karst development is strong,how to ensure the stability of the surrounding project foundation and ensure the construction quality and construction period of the pile foundation,which is a difficult problem for this type of construction.Taking the foundation construction of Guangzhou Infinitus Square as an example,the construction technology of full casing cast-in-place pile in high-density karst strong development area is described in detail,which is safe and reliable and has wide promotion significance.