Processing method for foundation pit piping

Abstract

The invention relates to a processing method for foundation pit piping. The object of the processing method is to block water gushing channels and close big water gushing points through chemical grouts so as to prevent the under water below a foundation pit pouring into the foundation pit, and accordingly create conditions for a dry construction. The technical scheme of the processing method includes the steps of: a) distributing holes within a water gushing area; b) sequentially aligning and drilling the holes through a drill and timely pressing steel sleeves into the holes in the drilling process, wherein a water outlet valve is mounted at a water outlet of an elbow which is positioned at the upper end of the steel sleeve inside which grouting pipeline equipment is installed; c) after finishing the pressing of the steel sleeves, firstly blanketing the openings of the holes with clay, then covering the clay with concrete or mortar and sealing gaps with cotton and quick-drying cement; d) after the concrete strength is reached, closing the water outlet valves and using a grout pump to grout the water soluble polyurethane slurry into a hole enclosed by the steel sleeves through a grouting pipe and a shot grout porous pipe. The processing method for foundation pit piping is applicable to the pit construction process of high buildings.

Description

technical field [0001] The invention relates to a treatment method for foundation pit piping. It is suitable for all kinds of projects, especially the foundation pit construction process of high buildings. Background technique [0002] During the construction of the foundation pit of the project, sudden water gushes often occur. There are two common types of water gushing, one is clear water, and the other is mixed water with sediment. At present, the commonly used treatment method is to use the bottom of the well dewatering method, that is, to lead the gushing water into the accumulation pit, set the corresponding flow rate of the water pump and the depth of the bottom of the well according to the unit water gushing volume, and discharge the gushing water out of the pit through the water pump to create dry construction conditions. However, the disadvantages of this method are 1) the possibility of landslides. For the situation where the gushing water contains sediment,...

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Problems solved by technology

However, the disadvantages of this method are 1) the possibility of landslides. For the situation where the gushing water contains sediment, if the gushing water brings out the particles in the foundation pit, the compactness of the foundation pit will be reduced, and this phenomenon will occur for a long time. 2) The pumping period is long, because the water gushing in the foundation pit is often for a long time, and continuous pumping is required to ensure the conditions for dry land construction. After the foundation pit construction is completed, the well still needs to be repaired Carry out plugging treatment; 3) The cost of pumping water is high, and the pump needs to be equipped with special equipment and maintenance management personnel, and the long-term maintenance cost is relatively high

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