Method for treating quicksand in digging hole of manual digging pile by light well point dewatering

Abstract

The invention relates to a method for treating quicksand in a digging hole of a manual digging pile by light well point dewatering. The method comprises the steps that a punching and a dewatering device which are used for treating the quicksand are adopted, specifically, the method is characterized in that a concrete protective wall at the upper part of a quicksand layer is well prepared; a hole is punched obliquely outwards along the water surface part of the quicksand layer at the bottom of the protective wall; a flexible water collecting pipe is assembled and connected, connecting pipes areconnected with well point pipes and the flexible water collecting pipe, a small hoist crane equipped for digging is used for hoisting a drainage pump into the bottom of a pile hole, the flexible water collecting pipe is connected through a water suction port of the drainage pump, pumping and drainage are carried out, and the drainage pump enters the quicksand layer of the digging pile for dewatering, digging and concrete supporting; and after the quicksand treatment is finished and the hole is dug to the designed depth of the pile hole, the dewatering should be continuously maintained until the acceptance of the pile hole is qualified, the pump can be stopped before a reinforcement cage is ready to be lowered, the drainage pump and a drainage pipe in the pile hole are withdrawn, and the flexible water collecting pipe and the connecting pipes are disassembled. According to the method, the dewatering efficiency and speed are high; meanwhile, the method is more suitable for simultaneously treating the quicksand by a plurality of pile holes; and a group well dewatering effect can be generated, the quicksand treatment speed is accelerated, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to a pile foundation construction method in the field of construction, in particular to a method for light well point dewatering to treat quicksand in holes dug by manual hole-digging piles. Background technique [0002] In the construction of infrastructure, such as bridges, high-rise buildings, etc., cast-in-place piles are the most widely used pile foundation form. The reason is that the drilling rig is difficult to construct, and it is not suitable to use the drilling rig for construction due to the disparity in economic benefits, etc.) has an irreplaceable role. At present, the types of cast-in-situ piles suitable for manual excavation pile construction are as follows: [0003] Single-pile large-diameter cast-in-situ piles, such as the foundation of telecommunication signal towers, generally use cast-in-situ piles with a diameter of about 1.5m and a pile length of about 10m as the tower foundation. Various cast-in-situ pile...

AI Technical Summary

Problems solved by technology

[0021] The purpose of the present invention is to solve the deficiencies of the technical measures for dealing with the quicksand layer when the existing manual digging pile encounters the quicksand layer, and to provide a kind of digging pile with compact equipment, more economical use, and safer construction. Precipitation device and method for treating quicksand

Images