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Foundation pit local dewatering construction method

A construction method and foundation pit technology, which is applied in basic structure engineering, excavation, construction, etc., can solve problems such as well wall mud collapse, blockage of drainage pumps, and small construction volume, so as to prevent blockage, prevent overflow, and prevent precipitation The effect of well collapse

Inactive Publication Date: 2020-02-21
陕西神州实业有限公司
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Problems solved by technology

[0005] The deep foundation pit dewatering construction method provided by the above invention has a small construction amount, enhances the safety of construction, and improves the construction efficiency. However, the dewatering well is formed by directly drilling on the foundation, and in the later construction process, it is impacted by groundwater. Borehole collapse is prone to occur, and even the mud on the well wall may collapse and block the drainage pump

Method used

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  • Foundation pit local dewatering construction method
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  • Foundation pit local dewatering construction method

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0043] refer to figure 1 , which is a local dewatering construction method for a foundation pit disclosed by the present invention, comprising the following steps:

[0044] S1: Determine the size, number and location of the dewatering wells, determine the depth and diameter of the dewatering wells according to the depth of the foundation pit and the height of the groundwater table, and calculate the number and location of the dewatering wells according to the area and orientation of the foundation pit.

[0045] S2: Make the downfall pipe 4, and make the downwater pipe 4 according to the depth of the downwater well and the aperture of the downwater well set in the first step.

[0046] refer to image 3, the height of the downcomer 4 is higher than the preset height to prevent the water surface from overflowing, and the inner diameter of the downcomer 4 is eq...

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Abstract

The invention relates to a foundation pit local dewatering construction method, relates to the technical field of foundation pit dewatering, and aims at solving the problems that an existing dewatering well easily receives impact of underground water, and easily generates the hole collapse condition, or even well wall slurry collapsing can occur, and a water discharging pump is blocked. The methodcomprises the following steps of Step 1, determining the dimension, quantity and positions of dewatering wells; Step 2, manufacturing dewatering pipes; Step 3, digging water collecting pits; Step 4,fixing the dewatering pipes; Step 5, filling and installing filtering layers; and Step 6, constructing waterproof layers. The foundation pit local dewatering construction method has the beneficial effect that a hole collapsing phenomenon of the dewatering wells can be reduced.

Description

technical field [0001] The invention relates to the technical field of foundation dewatering, in particular to a construction method for local dewatering of foundation pits. Background technique [0002] Foundation pit dewatering means that during the construction of high-rise buildings, when the excavation of the foundation pit is deep and the groundwater level is high, the groundwater will continuously infiltrate into the pit because the groundwater level is higher than the bottom surface of the excavation of the foundation pit. Precipitation work is done to prevent problems such as slope instability, foundation quicksand, pit bottom uplift, pit bottom piping, and foundation bearing capacity decline. [0003] The methods of foundation pit dewatering mainly include: open ditch plus water collection well dewatering, light well point dewatering, jet well point dewatering, electroosmotic well point dewatering, deep well well point dewatering, etc. When the bottom of the found...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D19/10E02D19/22E02D17/06
CPCE02D17/06E02D19/10E02D19/22
Inventor 任文艺杨亚军井文奇
Owner 陕西神州实业有限公司
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