Construction method of deep foundation pit dewatering wells
A construction method and technology for dewatering wells, which are applied in infrastructure engineering, construction, etc., can solve the problems of high production cost, slow water filtration of precast concrete pipes, and poor filtration effect.
Inactive Publication Date: 2020-07-28
CHINA METALLURGICAL CONSTR ENG GRP
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Problems solved by technology
The use of prefabricated concrete pipes as water filter pipes has the problems of poor filtering effect and high production cost
At the same time, the water filtration of prefabricated concrete pipes is slow, which affects the construction efficiency
Method used
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Embodiment
[0022] The deep foundation pit dewatering well construction method provided by the present embodiment comprises the following steps: S1, according to the soil quality of the construction site and the site area, determine the depth, position, and quantity of each dewatering well in the deep foundation pit to obtain the deep foundation pit The construction plan of the dewatering well; S2, according to the construction method of the dewatering well, measure and set out to mark the specific location of each dewatering well; S3, according to the requirements of the construction plan of the dewatering well of the deep foundation pit, make the water filter pipe 1 to be hoisted at the construction site (such as figure 1 , figure 2 As shown), the water filter pipe 1 includes a reinforcement cage 11 whose diameter is smaller than the aperture of the rotary-dug well, and a horizontally arranged reinforcement mesh 12 is fixed at the lower end of the reinforcement cage 11, and a first filt...
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The invention discloses a construction method of deep foundation pit dewatering wells. The construction method comprises the following steps that a deep foundation pit dewatering well construction scheme is formulated according to construction site soil texture and site area; setting out is performed to mark the position of each dewatering well; water filter pipes and inner filter cartridges are manufactured, the inner filter cartridges are placed in the water filter pipes, and the water filter pipes comprise reinforcement cages, first filter cartridges and second filter cartridges, the firstfilter cartridges and the second filter cartridges are sequentially installed on the reinforcement cages; well drilling is performed to excavate rotary excavating wells, and the water filter pipes andthe inner filter cartridges are sequentially hoisted into the rotary excavating wells; dewatering pumps are installed and water is pumped for well washing until the water and sand are clean; a foundation pit is excavated, and all the water filter pipes are pulled out after the foundation pit is excavated to a set position; and capping is performed. The construction method of the deep foundation pit dewatering wells has the advantages that the water filtering effect is good, the manufacturing cost is low, and construction is convenient.
Description
technical field [0001] The invention relates to a foundation pit dewatering construction technology, in particular to a deep foundation pit dewatering well construction method. Background technique [0002] Foundation pit dewatering mainly includes sump dewatering method and well point dewatering method. Among them, well point dewatering method has the characteristics of large displacement, precipitation depth (15-50m), and is not restricted by soil quality. It is suitable for rich groundwater and foundation pits. Deep (> 10m), foundation pit covers a large area of engineering underground drainage. The well point dewatering method is to construct a certain number of dewatering wells around the foundation pit before excavation of the foundation pit, weld the water filter (well) at the bottom of the dewatering well, and use pumping equipment to pump out the groundwater in the well so that the excavated soil is always The method of keeping the dry state, the main process ...
Claims
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IPC IPC(8): E02D19/10
CPCE02D19/10
Inventor 李林杨洋邱长林
Owner CHINA METALLURGICAL CONSTR ENG GRP