Foundation pit water stop system adjacent to river permeable stratum and construction process thereof

Abstract

The invention provides a foundation pit water stop system adjacent to a river permeable stratum and a construction process thereof. A cofferdam, a protective wall, a waterproof wall, a second precipitation well, a clay bite pile group and a first bite pile group which are sequentially arranged are included; and the bottoms of all precipitation wells, clay bite piles, plain concrete piles and reinforced concrete piles enter an impervious layer. According to the scale of a foundation pit, engineering geology and hydrogeological conditions, the scope and scale of the cofferdam are determined; theprotective wall is constructed in a stacking manner, waterproof geotextile is laid, the cofferdam is piled up, the precipitation wells are drilled, water suction pumps are mounted in all the precipitation wells, and the water level of the precipitation wells on the side far from a river is made be higher than the water level in the precipitation wells near the river; the clay bite pile group is built; a bite pile group of the reinforced concrete piles and the plain concrete piles is built; and the adjacent reinforced concrete piles and plain concrete piles are wrapped with one-way grouting sleeve valve tubes, and the foundation pit water stop system adjacent to the river permeable stratum is built. By means of the water stop system, surrounding and intercepting of water is formed throughmultiple water-stopping lines, and the needs of project water stopping are effectively met.

Description

technical field [0001] The invention belongs to the technical field of building construction, and relates to an engineering measure for waterproofing and water-stopping of a foundation pit, in particular to a waterproofing and water-stopping measure for a foundation pit project close to a river and the ground is a high water-permeable stratum such as sand and pebbles, which can be widely used in The water stop in the foundation pit engineering can also be applied to the waterproof engineering of other foundation pits and buildings (structures) that have relatively high waterproof requirements. Background technique [0002] In engineering construction, waterproof engineering has always been the focus of project builders. From the start of construction to the later operation, the quality of waterproof engineering has a greater impact on all aspects of engineering construction. Especially in deep foundation pit engineering, the engineering effect of waterproof measures directly...

AI Technical Summary

Problems solved by technology

The underground diaphragm wall measures require slotting construction, and mud retaining walls are also required in the area adjacent to the river. However, in areas with abundant groundwater and pebble soil, there are difficulties in forming grooves and leakage of mud retaining walls, which is not conducive to the groove walls of underground diaphragm walls. Stable, the construction is difficult, and the construction quality cannot be guaranteed, and the water-stop effect is affected

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