Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Foundation pit excavation and support method of shield starting shaft adjacent to subway
The invention provides a foundation pit excavation and support method of a shield starting shaft adjacent to a subway. The foundation pit excavation and support method of the shield starting shaft adjacent to the subway comprises the following steps: 1) using composite anchor piles to reinforce and protect elevated sections and subgrade sections of the adjacent subway to reduce the disturbance tothe ground caused by isolation pile construction; 2) performing enclosure structure construction, wherein the enclosure structure adopts a combination of underground continuous walls and jet groutingpiles, and the joint of two adjacent underground continuous walls are reinforced with a jet grouting pile to stop water; and 3) adopting a horizontal segmentation and vertical layered excavation method for excavation, setting the current excavation layer as the base layer, performing support construction on the base layer after the base layer excavation is completed, and excavating the next layerof the base layer after the support construction of the base layer is completed until the excavation of the foundation pit is completed. Through the technical scheme provided by the application, the problem that the foundation pit of the shield starting shaft adjacent to the subway in the prior art cannot meet the construction requirements can be solved.
本发明提供了一种邻近地铁的盾构始发井基坑开挖及支护方法，该邻近地铁的盾构始发井基坑开挖及支护方法包括：1)利用复合锚杆桩对相邻地铁的高架段和路基段进行加固防护，以降低隔离桩施工对地层的扰动；2)进行围护结构施工，该围护结构采用地下连续墙和旋喷桩相结合的方式，相邻两个地下连续墙的接缝处采用旋喷桩加固止水；3)采用水平分段、竖向分层的开挖方式进行开挖，将当前开挖层设定为基准层，基准层开挖完成后对其进行支撑施工，完成基准层的支撑施工后再进行基准层的下一层的开挖，直至完成基坑开挖。通过本申请提供的技术方案，能够解决现有技术中的邻近地铁的盾构始发井基坑无法满足施工要求的问题。
Foundation pit excavation and support method of shield starting shaft adjacent to subway
The invention provides a foundation pit excavation and support method of a shield starting shaft adjacent to a subway. The foundation pit excavation and support method of the shield starting shaft adjacent to the subway comprises the following steps: 1) using composite anchor piles to reinforce and protect elevated sections and subgrade sections of the adjacent subway to reduce the disturbance tothe ground caused by isolation pile construction; 2) performing enclosure structure construction, wherein the enclosure structure adopts a combination of underground continuous walls and jet groutingpiles, and the joint of two adjacent underground continuous walls are reinforced with a jet grouting pile to stop water; and 3) adopting a horizontal segmentation and vertical layered excavation method for excavation, setting the current excavation layer as the base layer, performing support construction on the base layer after the base layer excavation is completed, and excavating the next layerof the base layer after the support construction of the base layer is completed until the excavation of the foundation pit is completed. Through the technical scheme provided by the application, the problem that the foundation pit of the shield starting shaft adjacent to the subway in the prior art cannot meet the construction requirements can be solved.
本发明提供了一种邻近地铁的盾构始发井基坑开挖及支护方法，该邻近地铁的盾构始发井基坑开挖及支护方法包括：1)利用复合锚杆桩对相邻地铁的高架段和路基段进行加固防护，以降低隔离桩施工对地层的扰动；2)进行围护结构施工，该围护结构采用地下连续墙和旋喷桩相结合的方式，相邻两个地下连续墙的接缝处采用旋喷桩加固止水；3)采用水平分段、竖向分层的开挖方式进行开挖，将当前开挖层设定为基准层，基准层开挖完成后对其进行支撑施工，完成基准层的支撑施工后再进行基准层的下一层的开挖，直至完成基坑开挖。通过本申请提供的技术方案，能够解决现有技术中的邻近地铁的盾构始发井基坑无法满足施工要求的问题。
Foundation pit excavation and support method of shield starting shaft adjacent to subway
邻近地铁的盾构始发井基坑开挖及支护方法
CHEN SHUANG (Autor:in) / DU GUIXIN (Autor:in) / LIU LEI (Autor:in) / GAO SHIJUN (Autor:in) / ZHAO BIN (Autor:in) / LIU SHANFU (Autor:in) / FANG XINSHENG (Autor:in) / LI RUIGUANG (Autor:in) / WU QIONG (Autor:in)
21.08.2020
Patent
Elektronische Ressource
Chinesisch
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