Foundation pit dewatering construction method based on super pressure-suction combined water pumping system
A construction method and technology of drainage system, applied in infrastructure engineering, construction, etc., can solve the problems of low precipitation effect, low applicability, low precipitation efficiency, etc., and achieve improved precipitation effect, large applicability, and high precipitation efficiency. Effect
Inactive Publication Date: 2021-08-03
CHINA RAILWAY SIXTH GROUP +1
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Problems solved by technology
[0003] However, the above-mentioned precipitation method for the foundation pit has little applicability due to the inability to take into account the influence of geology, water, soil or water sediment content or other factors, and its operation is complicated and the precipitation efficiency is low. The precipitation effect of the pit precipitation method is low
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[0045] The specific implementation manners of the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0046] refer to figure 1 ,figure 1 It is a schematic flow chart of an embodiment of the foundation pit dewatering construction method based on the super pressure-suction combined pumping system of the present invention, the method includes the following steps:
[0047] 101. Well completion construction: determine the drilling well position and the pre-calculated well spacing for excavating the foundation pit, and vertically bury the pre-prepared hole protection pipe into the undisturbed soil of the drilling well position according to the depth of 10cm-20cm, and pass the approaching The drilling rig, according to the mud specifi...
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Abstract
The invention relates to the technical field of building construction, and discloses a foundation pit dewatering construction method based on a super pressure-suction combined water pumping system. The method is used for improving the dewatering effect of an existing foundation pit dewatering method. The method comprises the following steps of 1, well completion construction; 2, construction of a pumping system and a drainage system, wherein a vacuum pump is put into a dewatering well, an air supply pipeline connected with an air supply system is laid, a drainage pipeline connected with the vacuum pumping system is laid, a cable is laid, and a wellhead is sealed, so that a vacuum dewatering deep well and the super pressure-suction combined pumping system are obtained; 3, well washing and pumping test or multi-well construction; and 4, foundation pit dewatering, wherein the change condition of the pit outside water level of an excavated foundation pit is monitored through a pit outside water level observation well to obtain monitoring data, accumulated water in the excavated foundation pit is pumped into the drainage system in the foundation pit in a vacuum mode according to the vacuum degree larger than -0.06 MPa through the monitoring data and the super pressure-suction combined water pumping system, and surface drainage outside the foundation pit is conducted on the excavated foundation pit through the drainage system outside the foundation pit.
Description
technical field [0001] The invention relates to the technical field of building construction, in particular to a foundation pit dewatering construction method based on a super pressure-suction combined pumping system. Background technique [0002] In foundation construction, after the excavation of the foundation pit is completed, there may be groundwater at the bottom of the foundation pit or surface water flowing into the foundation pit, and the existence of groundwater at the bottom of the foundation pit or surface water flowing into the foundation pit will affect the safety and progress of the construction. Therefore, the precipitation of foundation pit has also become an important process in foundation construction. At present, the dewatering method of the foundation pit is generally to remove the accumulated water in the foundation pit by means of water collection and drainage, or to discharge the surface water in the foundation pit through the drainage ditch. [0003...
Claims
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Login to View More IPC IPC(8): E02D19/10E02D19/08
CPCE02D19/10E02D19/08
Inventor 谢阿梅何运涛夏文宇陈昌平孔琪袁志鹏
Owner CHINA RAILWAY SIXTH GROUP