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A platform for research: civil engineering, architecture and urbanism
Method for controlling underground water level of aquitard of large-area deep foundation pit
The invention relates to a method for controlling the underground water level of an aquitard of a large-area deep foundation pit. The method comprises the following steps of: S1, constructing a drainage open trench before earth excavation; S2, transforming the open trench into a blind trench before bottom plate construction; S3, transforming a circular trench and a water collecting well before outer wall backfilling; and S4, continuously connecting a PVC pipe well upwards along with an external wall backfilling progress during a basement structure construction period, wherein when underground water outside the foundation pit bypasses a waterproof curtain and permeates into the foundation pit, the underground water can be guided to the water absorption pit by a blind ditch network, after the water level rises, automatic pumping drainage is conducted by an automatic sensing ball valve submersible pump immediately, and the underground water level is continuously controlled. According to the method, the rainfall speed is not pursued, the earth surface is cut through the dense shallow ditches, so that the hydraulic penetration area is increased, the automatic penetration capacity of underground water is fully utilized, and the water level can be stably maintained.
本发明涉及一种大面积深基坑弱透水层地下水位控制方法，步骤一：土方开挖前，疏排水明沟施工：步骤二：底板施工前，将明沟改造成盲沟，步骤三：外墙回填前，改造环沟与集水井，步骤四：地下室结构施工期间，随着外墙回填进度，向上续接PVC管井，基坑外地下水绕过止水帷幕往基坑内渗透时，会被盲沟网络导向吸水坑，再利用自动感应的球阀潜水泵，水位上升后马上自动抽排，持续控制地下水位。本发明不追求降水速度，通过密集的浅沟，将地表进行了切割，增大了水力渗透面积，充分利用了地下水的自行渗透能力，能够稳定的维持水位。
Method for controlling underground water level of aquitard of large-area deep foundation pit
The invention relates to a method for controlling the underground water level of an aquitard of a large-area deep foundation pit. The method comprises the following steps of: S1, constructing a drainage open trench before earth excavation; S2, transforming the open trench into a blind trench before bottom plate construction; S3, transforming a circular trench and a water collecting well before outer wall backfilling; and S4, continuously connecting a PVC pipe well upwards along with an external wall backfilling progress during a basement structure construction period, wherein when underground water outside the foundation pit bypasses a waterproof curtain and permeates into the foundation pit, the underground water can be guided to the water absorption pit by a blind ditch network, after the water level rises, automatic pumping drainage is conducted by an automatic sensing ball valve submersible pump immediately, and the underground water level is continuously controlled. According to the method, the rainfall speed is not pursued, the earth surface is cut through the dense shallow ditches, so that the hydraulic penetration area is increased, the automatic penetration capacity of underground water is fully utilized, and the water level can be stably maintained.
本发明涉及一种大面积深基坑弱透水层地下水位控制方法，步骤一：土方开挖前，疏排水明沟施工：步骤二：底板施工前，将明沟改造成盲沟，步骤三：外墙回填前，改造环沟与集水井，步骤四：地下室结构施工期间，随着外墙回填进度，向上续接PVC管井，基坑外地下水绕过止水帷幕往基坑内渗透时，会被盲沟网络导向吸水坑，再利用自动感应的球阀潜水泵，水位上升后马上自动抽排，持续控制地下水位。本发明不追求降水速度，通过密集的浅沟，将地表进行了切割，增大了水力渗透面积，充分利用了地下水的自行渗透能力，能够稳定的维持水位。
Method for controlling underground water level of aquitard of large-area deep foundation pit
一种大面积深基坑弱透水层地下水位控制方法
WANG YITING (author) / XU HAIQIN (author) / HUANG XUEWEN (author) / LUO GUANGZAO (author)
2022-01-14
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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