Salinized-soil-strong tamping and water-discharging pile foundation processing method

Abstract

The invention is a saline soil region strongly ramming and drainage pile foundation processing method, called PDP strongly ramming method for short, comprising the steps of: firstly making pile machine in position, then starting the pile machine to make pile pipe vertically sink from the set position to the designed depth, casting gravels, screes, rough sand and other rough particular pile materials into the sunk pipe; after completing casting materials and drawing the pipe to form drainage pile; constructing other drainage piles; laying a layer of rough particular materials in the covering position of each drainage pile on the surface of the processed region to form a drainage surface layer; making click strong ramming on the drainage surface layer to form rammed pits; when the ground water in the foundation seeps into each drainage piles and converges through the drainage surface layer into the rammed pits, pumping out the ground water from the rammed pits to the outside of the construction site; and finally backfilling the rammed pits and leveling. And it can save foundation processing expenses, improve construction quality and raise working efficiency.

Description

(1) Technical field [0001] The invention relates to a foundation treatment method, in particular to a foundation treatment method in saline soil areas. (2) Background technology [0002] Qaidam Salt Lake is a natural resource in Qinghai Province and an important mineral resource in the western development strategy. However, the soil in the salt lake area is saline soil, and its natural foundation strength is low, and the superstructure can only be carried out after treatment. Due to the high groundwater level in the salt lake area, about 1m below the surface, and almost all brine with saturated salt content and a large amount of minerals, there are serious corrosion problems. The pile foundation and cement-based foundation treatment methods commonly used in engineering None of them can be used. For many years, the local area can only use gravel pile composite foundation for foundation treatment. The main reinforcement mechanism of general gravel piles is compaction and rei...

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Problems solved by technology

[0004] The purpose of this invention is to provide a kind of saline soil area dynamic compaction plus drainage pile foundation treatment method, referred to as DPD (dynamic compaction Dynamic consolidation, pile Pile, drainage Drainage) dynamic compaction method, to solve the low strength of saline soil foundation, water level High, groundwater is not easy to discharge, and solve the problem of improving the bearing capacity of saline soil foundation and reducing the settlement of buildings (structures). The problem of high foundation treatment costs

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