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A platform for research: civil engineering, architecture and urbanism
Chemical improvement curtain and well point dewatering foundation pit water stop structure and construction method
The invention discloses a chemical improvement curtain and a well point dewatering foundation pit water stop structure and a construction method. The method comprises the following steps that (1) a site is leveled to the designed elevation; (2) a foundation pit supporting and retaining structure is constructed, and a crown beam is installed at the upper end of the foundation pit supporting and retaining structure; (3) a chemically-improved grouting curtain is constructed; (4) a plurality of dewatering wells are excavated on the inner side of the chemically-improved grouting curtain, and a water suction pump is installed; and (5) the foundation pit is excavated, and graded sloping treatment is conducted till the depth of the foundation pit meets the design requirement; and the water suction pump continuously operates in the excavation process, so that the underground water level is 2.8-3.0 m below the working face. The chemically-improved grouting curtain water stop and well point dewatering foundation pit water stop combined structure is more suitable for foundation pit water stop in a water-rich silt area, and instability caused by the characteristics of large water content, low strength, large compressibility, large water permeability and the like of silt engineering can be effectively dealt with.
本发明公开了一种化学改良帷幕和井点降水的基坑止水结构及施工方法，该方法包括以下步骤：1)场地整平至设计标高；2)对基坑支挡结构进行施工，在基坑支挡结构的上端安装冠梁；3)对化学改良注浆帷幕进行施工；4)在化学改良注浆帷幕内侧开挖若干降水井，并安装抽水泵；5)开挖基坑并进行分级放坡处理，直到基坑的深度达到设计要求；其中，抽水泵在开挖过程中持续运行，使地下水位在作业面以下2.8～3.0m。化学改良注浆帷幕止水和井点降水联合的基坑止水结构更适用于富水粉土地区的基坑止水，能有效应对粉土工程含水量大、强度低、压缩性大、透水性大等特点带来的不稳定性。
Chemical improvement curtain and well point dewatering foundation pit water stop structure and construction method
The invention discloses a chemical improvement curtain and a well point dewatering foundation pit water stop structure and a construction method. The method comprises the following steps that (1) a site is leveled to the designed elevation; (2) a foundation pit supporting and retaining structure is constructed, and a crown beam is installed at the upper end of the foundation pit supporting and retaining structure; (3) a chemically-improved grouting curtain is constructed; (4) a plurality of dewatering wells are excavated on the inner side of the chemically-improved grouting curtain, and a water suction pump is installed; and (5) the foundation pit is excavated, and graded sloping treatment is conducted till the depth of the foundation pit meets the design requirement; and the water suction pump continuously operates in the excavation process, so that the underground water level is 2.8-3.0 m below the working face. The chemically-improved grouting curtain water stop and well point dewatering foundation pit water stop combined structure is more suitable for foundation pit water stop in a water-rich silt area, and instability caused by the characteristics of large water content, low strength, large compressibility, large water permeability and the like of silt engineering can be effectively dealt with.
本发明公开了一种化学改良帷幕和井点降水的基坑止水结构及施工方法，该方法包括以下步骤：1)场地整平至设计标高；2)对基坑支挡结构进行施工，在基坑支挡结构的上端安装冠梁；3)对化学改良注浆帷幕进行施工；4)在化学改良注浆帷幕内侧开挖若干降水井，并安装抽水泵；5)开挖基坑并进行分级放坡处理，直到基坑的深度达到设计要求；其中，抽水泵在开挖过程中持续运行，使地下水位在作业面以下2.8～3.0m。化学改良注浆帷幕止水和井点降水联合的基坑止水结构更适用于富水粉土地区的基坑止水，能有效应对粉土工程含水量大、强度低、压缩性大、透水性大等特点带来的不稳定性。
Chemical improvement curtain and well point dewatering foundation pit water stop structure and construction method
一种化学改良帷幕和井点降水的基坑止水结构及施工方法
SONG YEQING (author) / PAN GUOHUA (author) / ZHAO DIANPENG (author) / LIU MINGWEI (author) / GU HAIJUN (author) / MAO WEIXIN (author) / ZHANG CHONGYANG (author) / KONG ZENGZENG (author) / ZHAO JIN (author) / GE PENGFEI (author)
2021-09-10
Patent
Electronic Resource
Chinese
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