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A platform for research: civil engineering, architecture and urbanism
Foundation pit supporting structure adjacent to high-speed rail operation line and construction method of foundation pit supporting structure
The invention provides a foundation pit supporting structure adjacent to a high-speed rail operation line. The foundation pit supporting structure comprises a waterproof curtain and a high-pressure jet grouting pile which are arranged along the outer side of the edge of a foundation pit, and a plurality of drilling piles arranged along the inner side of the edge of the foundation pit. The waterproof curtain is arranged on the side close to the high-speed rail operation line, the high-pressure jet grouting piles are arranged on the side away from the high-speed rail operation line, the drilling piles are arranged close to the inner sides of the waterproof curtain and the high-pressure jet grouting piles, a foundation reinforcing layer is arranged on the inner sides of the drilling piles, and a plurality of dewatering wells are arranged along the edge of the inner side of the foundation reinforcing layer. According to the construction method, the early construction micro-disturbance waterproof curtain is adopted as a temporary isolation measure, so that the influence on the high-speed rail during the construction period of the foundation pit waterproof curtain and the enclosure structure of the foundation pit close to the operation high-speed rail foundation pit is effectively reduced, and the influence on the high-speed rail caused by lateral displacement and vertical settlement of a soil body due to deformation of the enclosure structure during excavation of the foundation pit and precipitation can be solved; and meanwhile, a sectioned enclosure structure form is adopted in combination with different protection distances, so that the project investment can be effectively controlled.
本发明提供了一种紧邻高铁运营线的基坑支护结构，包括沿基坑边沿外侧设置的止水帷幕和高压旋喷桩，以及沿基坑边沿内侧设置的若干个钻孔桩；止水帷幕于临近高铁运营线侧布置，高压旋喷桩于远离高铁运营线侧布置，钻孔桩紧邻所述止水帷幕和高压旋喷桩内侧设置，钻孔桩内侧设置有地基加固层，沿地基加固层内侧边沿设有若干降水井。该发明通过采用先期施工微扰动的止水帷幕作为临时隔离措施，有效减小临近运营高铁基坑在基坑止水帷幕、围护结构施工期间对高铁的影响，并能解决基坑开挖及降水期间围护结构变形引起的土体侧向位移、竖向沉降对高铁的影响，同时结合不同保护距离采用分区段的围护结构形式，可有效控制工程投资。
Foundation pit supporting structure adjacent to high-speed rail operation line and construction method of foundation pit supporting structure
The invention provides a foundation pit supporting structure adjacent to a high-speed rail operation line. The foundation pit supporting structure comprises a waterproof curtain and a high-pressure jet grouting pile which are arranged along the outer side of the edge of a foundation pit, and a plurality of drilling piles arranged along the inner side of the edge of the foundation pit. The waterproof curtain is arranged on the side close to the high-speed rail operation line, the high-pressure jet grouting piles are arranged on the side away from the high-speed rail operation line, the drilling piles are arranged close to the inner sides of the waterproof curtain and the high-pressure jet grouting piles, a foundation reinforcing layer is arranged on the inner sides of the drilling piles, and a plurality of dewatering wells are arranged along the edge of the inner side of the foundation reinforcing layer. According to the construction method, the early construction micro-disturbance waterproof curtain is adopted as a temporary isolation measure, so that the influence on the high-speed rail during the construction period of the foundation pit waterproof curtain and the enclosure structure of the foundation pit close to the operation high-speed rail foundation pit is effectively reduced, and the influence on the high-speed rail caused by lateral displacement and vertical settlement of a soil body due to deformation of the enclosure structure during excavation of the foundation pit and precipitation can be solved; and meanwhile, a sectioned enclosure structure form is adopted in combination with different protection distances, so that the project investment can be effectively controlled.
本发明提供了一种紧邻高铁运营线的基坑支护结构，包括沿基坑边沿外侧设置的止水帷幕和高压旋喷桩，以及沿基坑边沿内侧设置的若干个钻孔桩；止水帷幕于临近高铁运营线侧布置，高压旋喷桩于远离高铁运营线侧布置，钻孔桩紧邻所述止水帷幕和高压旋喷桩内侧设置，钻孔桩内侧设置有地基加固层，沿地基加固层内侧边沿设有若干降水井。该发明通过采用先期施工微扰动的止水帷幕作为临时隔离措施，有效减小临近运营高铁基坑在基坑止水帷幕、围护结构施工期间对高铁的影响，并能解决基坑开挖及降水期间围护结构变形引起的土体侧向位移、竖向沉降对高铁的影响，同时结合不同保护距离采用分区段的围护结构形式，可有效控制工程投资。
Foundation pit supporting structure adjacent to high-speed rail operation line and construction method of foundation pit supporting structure
一种紧邻高铁运营线的基坑支护结构及其施工方法
HE YAFEI (author) / XU JUNLIN (author) / CI LIKUN (author) / HUANG ZHENKE (author) / LIU MINJUN (author) / ZHOU BING (author) / WANG HUABING (author) / XIANG XIANHUA (author) / WANG PENG (author) / YU XING (author)
2021-11-02
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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