低强度混凝土咬合灌注桩在富水砂卵石地层管涌处置中的应用  

Application of Low Strength Concrete Occlusive Cast in Place Pile in Piping Treatment of Water Rich Sandy Cobble Stratum

作　　者：杨明德 YANG Mingde(Shanghai Construction Group Co.,Ltd.Shanghai 200080,China)

机构地区：[1]上海建工集团股份有限公司,上海200080

出　　处：《广东土木与建筑》2021年第10期54-57,共4页Guangdong Architecture Civil Engineering

摘　　要：目前地下空间开发主要集中于浅表地层,受限于地质的复杂多样性和经济的发展,未来相当一段时间内,深基坑止水支护技术仍将广泛用于地下空间开发。毗邻河流的富水砂卵地层,其含水丰富、渗透性强、流动性突出,限制了传统注浆止水帷幕成墙质量,从而影响止水效果。低强度混凝土咬合灌注桩是基于咬合桩支护技术发展而来,通过方案比选和严格的工艺控制,其在富水砂卵地层管涌处置的适应性和经济性,均优于传统注浆止水帷幕工艺。At present,the development of underground space is mainly concentrated in the shallow strata,which is limited by the com‐plex geological diversity and economic development.For quite some time in the future,the water stop support technology of deep foundation pit will still be widely used in the development of underground space.The water rich sand gravel stratum adjacent to the river has rich wa‐ter content,strong permeability and outstanding fluidity,which limits the quality of traditional grouting waterproof curtain wall and affects the water stop effect.Low strength concrete occlusive cast-in-place pile is developed based on occlusive pile support technology.Through scheme comparison and strict process control,its adaptability and economy in piping treatment of water rich sand gravel stratum are better than traditional grouting waterproof curtain technology.

关 键 词：低强度混凝土 止水帷幕 咬合桩 管涌 富水地层 

分 类 号：TU992[建筑科学—市政工程] TU745