PVC hole-pipe gravel pile and soft foundation processing method thereof

Abstract

The invention discloses a PVC hole-pipe gravel pile and a soft foundation processing method of the PVC hole-pipe gravel pile, and relates to the technical field of soft foundation processing. According to the structure of the PVC hole-pipe gravel pile, a concrete pile tip (60) and a novel pipe rock pile are connected with each other. The novel pipe rock pile comprises a PVC hole pipe (20) and a gravel pile body (10) arranged in the PVC hole pipe (20), wherein a novel cushion layer is arranged on the top of the novel pipe rock pile in a connected mode, and is connected with a first steel-plastic geogrid (31), a first gravel layer (41), a second steel-plastic geogrid (32), a second gravel layer (42) and a surface soil layer (50) in sequence, and a drainage system (70) is communicated with the novel cushion layer. According to the PVC hole-pipe gravel pile and the soft foundation processing method of the PVC hole-pipe gravel pile, construction is easy and convenient, cost is low, the controllable degree of quality is high, and the PVC hole-pipe gravel pile and the soft foundation processing method of the PVC hole-pipe gravel pile are applicable to a soft foundation processing project which is large in area, and has high requirements for the bearing capacity and differential settlement control.

Description

technical field [0001] The invention relates to the technical field of weak ground treatment, in particular to a PVC perforated pipe gravel pile and a method for treating weak ground. Background technique [0002] In infrastructure construction, weak ground has low genetic bearing capacity and large post-construction settlement, so foundation treatment must be carried out to improve its bearing capacity, reduce deformation and enhance liquefaction resistance. In the current weak ground treatment, gravel piles are one of the widely used methods. Crushed stone piles use vibration, impact or water flushing to form holes in weak foundations, and then squeeze sand and gravel into the holes to form a compact pile body composed of crushed stones with a certain diameter. It has multiple functions such as compaction, drainage and reinforcement, and has the characteristics of economical, easy construction and fast speed. However, since the gravel pile is composed of granular materia...

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Problems solved by technology

[0003] 1. A concrete core gravel pile (ZL: 200610037621.2) invented by Zhao Weibing, which uses prefabricated concrete piles as the core of the gravel pile to bear the vertical load and transmit it to the underlying hard soil layer, but this method Still can't solve the problem of gravel bulging

[0004] 2. A double radial cage gravel pile (ZL: 201020603436.7) invented by Wang Zhongwei. A lateral restraint cage is set on the pile side of the gravel pile to increase the bearing capacity of the gravel pile and reduce settlement, but the problem is that The reinforced mesh cage is easy to corrode, and its construction technology is also complicated, so it is difficult to control the quality of the project

[0005] 3. A vertical tubular grid reinforced gravel pile (ZL: 200620074257.2) invented by Gao Mingjun. A tubular geogrid is wrapped around the upper part of the ordinary gravel pile to limit lateral bulge deformation and improve load bearing However, the strength of the tubular geogrid is small, and it can only effectively improve the bearing capacity of the surface layer, and has a limited effect on improving the overall bearing capacity.

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