A method of excavating a foundation pit
A technology of foundation pit and extension direction, which is applied in excavation, foundation structure engineering, construction and other directions, which can solve problems such as settlement and achieve the effect of reducing costs
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Embodiment 1
[0042] During construction, first determine the seepage direction of groundwater inside the foundation pit area to be excavated (such as figure 1 (indicated by the middle arrow), and then construct the foundation pit enclosure structure 1, and excavate the soil layer above the groundwater level, wherein, the area surrounded by the foundation pit enclosure structure 1 is the area to be excavated. It should be noted that the foundation pit enclosure structure is a conventional structure for foundation pit construction.
[0043] Such as figure 1 As shown in , the area of the foundation pit to be excavated is divided into n excavation sections with roughly equal areas. Section I starts from the downstream of the groundwater seepage direction, and at the junction of sections I and II a 1 Precipitation zone 2 is set at the position, and precipitation zone 2 intersects with the groundwater seepage direction inside the foundation pit area to be excavated.
[0044] Such as Figure...
Embodiment 2
[0053] The difference from Example 1 is that the precipitation zone is composed of a plurality of precipitation wells, each precipitation well is arranged at intervals along the direction perpendicular to the groundwater seepage, the precipitation wells are filled with filter material, and a filter pipe is arranged in the filter material, and the filter pipe is connected with a drainage The drain pipe is connected with a water pump, and the water pump is used to pump out the groundwater in the dewatering well.
Embodiment 3
[0055] The difference from Example 1 is that after Section I is completed, the junction a of Sections I and II is removed first 1 The water pump, drainage pipe, water filter pipe and filter material at the place, and then at the junction of Sections II and III a 2 Dig the catchment ditch at the place, and make the junction a 1 The drainage pipes, filter pipes and filter materials at the place are put into the gutter to form a precipitation belt, and then the second section is excavated.
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