A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Foundation pit excavation and supporting system for up-crossing subway tunnel and construction method
The invention provides a foundation pit excavation and supporting system for an up-crossing subway tunnel and a construction method. A foundation pit to be excavated is divided into two or four or sixexcavation area blocks by division piles and circumferential piles, each excavation area block is vertically divided into four layers for excavation, each layer is divided into three blocks, and soilexcavation is carried out in accordance with the principle of first two sides and then the middle. The driving direction of supporting piles is defined by a guide baffle plate, and an integral connecting plate is firmly connected with the supporting piles through grouting anchor pipes and anchoring and grouting bodies. The vertical position of a top die of a pressing bottom plate is defined by atop die position control bolt. Pit bottom pressing bottom plates comprise cast-in-place pressing bottom plates and prefabricated pressing bottom plates, and prefabricated slab connecting bars and inter-slab reinforcement bodies are arranged between the connected prefabricated pressing bottom plates. The pit bottom pressing bottom plates are pressed inversely by backpressure blocks and pressurizingbags together. Pile side backpressure bodies are arranged between vertical supporting beams and the circumferential piles. The foundation pit excavation and supporting system can reduce the disturbance of foundation pit excavation to the surrounding soil, improve the quality and efficiency of site construction, and improve the structure stress.
本发明提供一种上穿地铁隧道基坑开挖支护体系及施工方法，通过分隔桩和环向桩将待开挖基坑分隔成2个或4个或6个开挖区块，每个开挖区块竖向分4层开挖，每层分为3块，按照“先两侧，后中间”的原则进行土体开挖；通过导向隔板限定支护桩的打设方向；通过压浆锚管及锚固压浆体将整体式连板与支护桩连接牢固；通过顶模控位栓限定压底板顶模的竖向位置；坑底压底板包括现浇压底板和预制压底板，并在相接的预制压底板之间设置了预制板连筋和板间增强体；采用反压块体和加压囊袋共同对坑底压底板进行反压；在竖向撑梁与环向桩之间设置了桩侧反压体。本发明可降低基坑开挖对周边土体的扰动、提高现场施工质量和效率、改善结构受力。
Foundation pit excavation and supporting system for up-crossing subway tunnel and construction method
The invention provides a foundation pit excavation and supporting system for an up-crossing subway tunnel and a construction method. A foundation pit to be excavated is divided into two or four or sixexcavation area blocks by division piles and circumferential piles, each excavation area block is vertically divided into four layers for excavation, each layer is divided into three blocks, and soilexcavation is carried out in accordance with the principle of first two sides and then the middle. The driving direction of supporting piles is defined by a guide baffle plate, and an integral connecting plate is firmly connected with the supporting piles through grouting anchor pipes and anchoring and grouting bodies. The vertical position of a top die of a pressing bottom plate is defined by atop die position control bolt. Pit bottom pressing bottom plates comprise cast-in-place pressing bottom plates and prefabricated pressing bottom plates, and prefabricated slab connecting bars and inter-slab reinforcement bodies are arranged between the connected prefabricated pressing bottom plates. The pit bottom pressing bottom plates are pressed inversely by backpressure blocks and pressurizingbags together. Pile side backpressure bodies are arranged between vertical supporting beams and the circumferential piles. The foundation pit excavation and supporting system can reduce the disturbance of foundation pit excavation to the surrounding soil, improve the quality and efficiency of site construction, and improve the structure stress.
本发明提供一种上穿地铁隧道基坑开挖支护体系及施工方法，通过分隔桩和环向桩将待开挖基坑分隔成2个或4个或6个开挖区块，每个开挖区块竖向分4层开挖，每层分为3块，按照“先两侧，后中间”的原则进行土体开挖；通过导向隔板限定支护桩的打设方向；通过压浆锚管及锚固压浆体将整体式连板与支护桩连接牢固；通过顶模控位栓限定压底板顶模的竖向位置；坑底压底板包括现浇压底板和预制压底板，并在相接的预制压底板之间设置了预制板连筋和板间增强体；采用反压块体和加压囊袋共同对坑底压底板进行反压；在竖向撑梁与环向桩之间设置了桩侧反压体。本发明可降低基坑开挖对周边土体的扰动、提高现场施工质量和效率、改善结构受力。
Foundation pit excavation and supporting system for up-crossing subway tunnel and construction method
上穿地铁隧道基坑开挖支护体系及施工方法
CHU GENFA (author) / WEI SHIJUN (author) / HE WEI (author) / ZHU CHENGZHENG (author) / LIANG HUI (author) / JI LEI (author) / ZHENG JIE (author) / WANG MENG (author) / GAO MING (author)
2020-10-20
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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