A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Overpass existing large karst subsidence area station foundation pit water inrush risk disposal method
The invention discloses an overpass existing large karst subsidence area station foundation pit water inrush risk disposal method which comprises the following steps: S1, according to a ground water outlet point in a foundation pit, determining an underground water seepage point, and determining an underground water seepage path; s2, holes are drilled in the peripheries of all the underground water leakage points, grouting is conducted to form a water stop wall, and water power supply in the foundation pit is cut off; s3, if the underground water leakage point determined in the step S1 is close to the underground diaphragm wall, a waterproof curtain is constructed at the position, corresponding to the leakage point, outside the foundation pit, and water power supply outside the foundation pit is reduced; and S4, holes are drilled in the peripheries of all the underground water leakage points, and waterborne polyurethane grouting materials are injected into the holes. According to the method, the problem of pit bottom sudden water gushing occurring during excavation of the underground diaphragm wall foundation pit without bottom detection under the condition of the strong karst development stratum can be solved, the risk of foundation pit construction within the karst cave range is reduced, and the safety of ground surface buildings within the karst cave influence range is guaranteed.
本发明公开了一种上跨既有大型岩溶塌陷区车站基坑突涌水风险处置方法，包括以下步骤：S1、根据基坑内的地面出水点，确定地下水渗漏点，明确地下水渗流路径；S2、通过在各地下水渗漏点外周钻孔，并注浆形成止水墙，隔断基坑内的水力供给；S3、若步骤S1确定的地下水渗漏点靠近地连墙，在基坑外对应渗漏点的位置施作止水帷幕，降低基坑外的水力供给；S4、在各地下水渗漏点的外周钻孔并注入水性聚氨酯灌浆材料。本发明能够解决岩溶强发育地层条件下未探底地连墙基坑开挖时出现的坑底突涌水问题，降低溶洞范围内基坑施工的风险，保障溶洞影响范围内的地表建构筑物安全。
Overpass existing large karst subsidence area station foundation pit water inrush risk disposal method
The invention discloses an overpass existing large karst subsidence area station foundation pit water inrush risk disposal method which comprises the following steps: S1, according to a ground water outlet point in a foundation pit, determining an underground water seepage point, and determining an underground water seepage path; s2, holes are drilled in the peripheries of all the underground water leakage points, grouting is conducted to form a water stop wall, and water power supply in the foundation pit is cut off; s3, if the underground water leakage point determined in the step S1 is close to the underground diaphragm wall, a waterproof curtain is constructed at the position, corresponding to the leakage point, outside the foundation pit, and water power supply outside the foundation pit is reduced; and S4, holes are drilled in the peripheries of all the underground water leakage points, and waterborne polyurethane grouting materials are injected into the holes. According to the method, the problem of pit bottom sudden water gushing occurring during excavation of the underground diaphragm wall foundation pit without bottom detection under the condition of the strong karst development stratum can be solved, the risk of foundation pit construction within the karst cave range is reduced, and the safety of ground surface buildings within the karst cave influence range is guaranteed.
本发明公开了一种上跨既有大型岩溶塌陷区车站基坑突涌水风险处置方法，包括以下步骤：S1、根据基坑内的地面出水点，确定地下水渗漏点，明确地下水渗流路径；S2、通过在各地下水渗漏点外周钻孔，并注浆形成止水墙，隔断基坑内的水力供给；S3、若步骤S1确定的地下水渗漏点靠近地连墙，在基坑外对应渗漏点的位置施作止水帷幕，降低基坑外的水力供给；S4、在各地下水渗漏点的外周钻孔并注入水性聚氨酯灌浆材料。本发明能够解决岩溶强发育地层条件下未探底地连墙基坑开挖时出现的坑底突涌水问题，降低溶洞范围内基坑施工的风险，保障溶洞影响范围内的地表建构筑物安全。
Overpass existing large karst subsidence area station foundation pit water inrush risk disposal method
上跨既有大型岩溶塌陷区车站基坑突涌水风险处置方法
YANG ZHAO (author) / SONG XIANGSHUAI (author) / CHEN PEISHUAI (author) / ZHANG WENJUN (author) / JI FUQUAN (author) / YU QINGRU (author) / XU CHAO (author) / ZHU TAO (author) / LI JIEHUA (author) / ZHANG FEILEI (author)
2024-11-29
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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