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A platform for research: civil engineering, architecture and urbanism
Treatment method for large-flow confined water inrush of foundation pit
The invention provides a treatment method for large-flow confined water inrush of a foundation pit, and belongs to the technical field of building construction. The problem that an existing foundation pit piping sudden accident cannot be treated in time is solved. The method comprises the following steps that 1, a pressure reduction and precipitation standby well and a water level observation well in a foundation pit and a water level observation well combined use well outside the foundation pit are started for water pumping; 2, back pressure is conducted on the leakage area, drainage is conducted on leakage points through a drainage pipe, and sand filtering and water seepage are achieved; 3, gushing water is drained into a drainage pipe, when the top end of the drainage pipe is higher than the water level, a still water condition is formed in the drainage pipe, and when no water gushing condition occurs in other areas of the water gushing point, double-liquid grouting is conducted on the outer side of the water gushing point, a water seepage channel is blocked, and then quick-drying concrete is poured to block a gushing opening; and 4, on the outer side of the inrush area and avoiding the settlement center area, a dewatering well is dug in a supplementary mode, and the water pumping capacity of lowering the water level to be 1 m below the maximum excavation face is achieved. The method has the advantage that the foundation pit piping sudden accidents can be timely dealt with.
本发明提供一种基坑大流量承压水突涌的处理方法，属于建筑施工技术领域。解决了现有基坑管涌突发事故处理不及时的问题。本发明包括以下步骤：步骤1：启用基坑内的减压降水备用井及水位观测井及基坑外的水位观测井兼备用井进行抽水；步骤2：对渗漏区域进行反压，用引流管对渗漏点进行引流，实现滤砂渗水；步骤3：将涌水引流至引流管内，当引流管顶端高于水位面时，在引流管内形成静水条件，当冒水点其他区域没有涌水情况发生时，在冒水点外侧用双液注浆，将渗水通道堵住,再浇灌快干砼封堵涌口；步骤4：在突涌区域外侧并避开沉降中心区，补打降水井达到将水位降至最大开挖面以下1米的抽水能力。本发明具有及时应对基坑管涌突发事故的优点。
Treatment method for large-flow confined water inrush of foundation pit
The invention provides a treatment method for large-flow confined water inrush of a foundation pit, and belongs to the technical field of building construction. The problem that an existing foundation pit piping sudden accident cannot be treated in time is solved. The method comprises the following steps that 1, a pressure reduction and precipitation standby well and a water level observation well in a foundation pit and a water level observation well combined use well outside the foundation pit are started for water pumping; 2, back pressure is conducted on the leakage area, drainage is conducted on leakage points through a drainage pipe, and sand filtering and water seepage are achieved; 3, gushing water is drained into a drainage pipe, when the top end of the drainage pipe is higher than the water level, a still water condition is formed in the drainage pipe, and when no water gushing condition occurs in other areas of the water gushing point, double-liquid grouting is conducted on the outer side of the water gushing point, a water seepage channel is blocked, and then quick-drying concrete is poured to block a gushing opening; and 4, on the outer side of the inrush area and avoiding the settlement center area, a dewatering well is dug in a supplementary mode, and the water pumping capacity of lowering the water level to be 1 m below the maximum excavation face is achieved. The method has the advantage that the foundation pit piping sudden accidents can be timely dealt with.
本发明提供一种基坑大流量承压水突涌的处理方法，属于建筑施工技术领域。解决了现有基坑管涌突发事故处理不及时的问题。本发明包括以下步骤：步骤1：启用基坑内的减压降水备用井及水位观测井及基坑外的水位观测井兼备用井进行抽水；步骤2：对渗漏区域进行反压，用引流管对渗漏点进行引流，实现滤砂渗水；步骤3：将涌水引流至引流管内，当引流管顶端高于水位面时，在引流管内形成静水条件，当冒水点其他区域没有涌水情况发生时，在冒水点外侧用双液注浆，将渗水通道堵住,再浇灌快干砼封堵涌口；步骤4：在突涌区域外侧并避开沉降中心区，补打降水井达到将水位降至最大开挖面以下1米的抽水能力。本发明具有及时应对基坑管涌突发事故的优点。
Treatment method for large-flow confined water inrush of foundation pit
一种基坑大流量承压水突涌的处理方法
YAN SHU (author) / YIN LIFENG (author) / ZHANG QINYU (author) / CHEN WEI (author) / SU YE (author) / WANG YUXI (author) / CAI SHUYONG (author) / WANG PENGYU (author) / MAO XIYUN (author) / YANG YANZONG (author)
2024-03-15
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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