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A platform for research: civil engineering, architecture and urbanism
Excavation method for four-layer subway station foundation pit
The invention discloses an excavation method for a four-layer subway station foundation pit. The technical problem that stability cannot be guaranteed in a complex geographical environment of a multi-layer foundation pit excavation face in the prior art is solved. The method comprises the steps that S1, crown beams and first concrete supports are manufactured; S2, a water-reducing well is manufactured, and the water-reducing well comprises a recharge well in a pit and an observation well outside the pit; S3, earthwork is excavated, negative first and negative second floors are constructed by open-cut and continuous construction, and negative third and negative fourth floors are constructed by cover-cut and reverse construction; S4, a foundation pit support is arranged at the gap of earthwork excavation, and the foundation pit support is composed of 1, 5, 6 concrete supports and 2, 3 and 4 steel supports; and S5, a main body structure is constructed, finally the roof is backfilled, andthe foundation pit excavation is completed. The method has the beneficial technical effects that the safety coefficient is high, and the method can adapt to complex landform features.
本发明公开了一种四层地铁站基坑开挖方法，以解决现有技术中多层基坑开挖面的复杂地理环境时无法保证稳定性的技术问题。本发明包括：步骤1：制作冠梁和第一道砼支撑；步骤2：制作降水井，包括坑内回灌井和坑外观测井；步骤3：土方开挖，负一层、负二层采用明挖顺作法施工，负三层、负四层采用盖挖逆作法；步骤4：在土方开挖的间隙设置基坑支护，包括第1、5、6道砼支撑和第2、3、4道钢支撑；步骤5：主体结构施工，最后进行顶板回填，完成基坑开挖。本发明的有益技术效果是：安全系数高，能够适应复杂的地貌特征。
Excavation method for four-layer subway station foundation pit
The invention discloses an excavation method for a four-layer subway station foundation pit. The technical problem that stability cannot be guaranteed in a complex geographical environment of a multi-layer foundation pit excavation face in the prior art is solved. The method comprises the steps that S1, crown beams and first concrete supports are manufactured; S2, a water-reducing well is manufactured, and the water-reducing well comprises a recharge well in a pit and an observation well outside the pit; S3, earthwork is excavated, negative first and negative second floors are constructed by open-cut and continuous construction, and negative third and negative fourth floors are constructed by cover-cut and reverse construction; S4, a foundation pit support is arranged at the gap of earthwork excavation, and the foundation pit support is composed of 1, 5, 6 concrete supports and 2, 3 and 4 steel supports; and S5, a main body structure is constructed, finally the roof is backfilled, andthe foundation pit excavation is completed. The method has the beneficial technical effects that the safety coefficient is high, and the method can adapt to complex landform features.
本发明公开了一种四层地铁站基坑开挖方法，以解决现有技术中多层基坑开挖面的复杂地理环境时无法保证稳定性的技术问题。本发明包括：步骤1：制作冠梁和第一道砼支撑；步骤2：制作降水井，包括坑内回灌井和坑外观测井；步骤3：土方开挖，负一层、负二层采用明挖顺作法施工，负三层、负四层采用盖挖逆作法；步骤4：在土方开挖的间隙设置基坑支护，包括第1、5、6道砼支撑和第2、3、4道钢支撑；步骤5：主体结构施工，最后进行顶板回填，完成基坑开挖。本发明的有益技术效果是：安全系数高，能够适应复杂的地貌特征。
Excavation method for four-layer subway station foundation pit
四层地铁站基坑开挖方法
YANG QIONGPENG (author) / HU XINPENG (author) / MA BIN (author) / LI WEI (author) / ZHAO CHANGQING (author) / ZHANG CUNBO (author) / WU WENJUAN (author) / TANG HE (author)
2020-08-25
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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