A sand layer anti-collapse method for perforated cast-in-place piles

Abstract

The invention discloses an anti-sloughing method of a sand layer of an impact-cone concrete pile. Cement is added into slurry of a slurry pool and mixed thoroughly, so that slurry liquid is prepared; in the process of punching construction, the prepared slurry liquid is poured into a hole; after the slurry liquid at the bottom of the hole is bonded with sand particles, the slurry liquid is pumped into a sediment pool for sand filtering, and is sent to the slurry pool to be manufactured again; and the steps are carried out continuously and circularly; The anti-sloughing method of the sand layer of the impact-cone concrete pile fully utilizes the adhesive bonding performance of the cement. On one hand, through the slurry liquid seeped into a hole wall, the adhesive bonding force among particles of the sand layer of the hole wall is increased, the satiability of the hole wall is strengthened largely, and the hole wall is effectively prevented from collapsing in the process of punching construction. On the other hand, the bonding effect between the slurry liquid and sand stones at the bottom of the hole is good, the sand stones at the bottom of the hole can be taken out completely, and the construction quality is guaranteed. In addition, the cement is used for improving the performance of ordinary slurry liquid, and has the advantages that material is convenient to draw, and the cost is low. The prepared slurry liquid has the advantages that the preparation is convenient, the stability is good, and the viscosity is easy to control.

Description

technical field [0001] The invention relates to the technical field of construction, in particular to a sand layer anti-collapse method for perforated cast-in-place piles. Background technique [0002] With the continuous development of the national economy, urban construction is advancing by leaps and bounds, high-rise buildings are developing rapidly, and many ultra-deep perforated pile constructions have emerged as the times require. According to its construction characteristics, there is a problem that there is a lack of cementing ability between the particles of the sand layer, and the hole wall is easy to collapse during punching construction. At present, the anti-collapse method of pouring ordinary mud is used in construction, and the effect is extremely unsatisfactory. It is easy to cause hole wall collapse, neck shrinkage, and neck expansion, which directly affects the construction quality of the pile foundation and will inevitably have a huge impact on the structur...

AI Technical Summary

Problems solved by technology

According to its construction characteristics, there is a problem that the sand layer lacks cementation ability between particles, and the hole wall is easy to collapse during punching construction.

At present, the anti-collapse method of pouring ordinary mud is used in construction, the effect is extremely unsatisfactory, and it is easy to cause the hole wall to collapse, shrink the neck, expand the neck, directly affect the construction quality of the pile foundation, and will inevitably have a huge impact on the structural stability of the entire building

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