A back sealing method for rock foundation pressure-bearing fissure water

Abstract

The invention discloses a back sealing method for pressure-bearing fissure water of a rock foundation, comprising the following steps: S1, laying permeable concrete on the rock foundation to form a permeable concrete layer; the permeable concrete includes the following raw materials: cement, recycled aggregate, Water-reducing agent and reinforcing agent; Described reinforcing agent is to comprise carboxymethyl cellulose, silicon powder and mortar glue; S2, on the permeable concrete layer that step S1 obtains, lay anti-seepage geomembrane; S3, the anti-seepage geomembrane that obtains in step S2 Concrete cushion is laid on the geomembrane. The material used in the back sealing method of the present invention is common in construction, no additional customization is required, the construction process is simple and convenient, the construction period is short, the cost is low, and the drainage effect is remarkable, which can effectively solve the impact of the uplift pressure on the concrete structure caused by the pressure-bearing crack water of the rock foundation At the same time, by setting a permeable concrete layer, the problem of seepage damage in the sand and pebble layer in the traditional method is avoided, and the quality and effect are good.

Description

technical field [0001] The invention belongs to the technical field of foundation treatment, and in particular relates to a bottom sealing method for rock foundation pressure-bearing fissure water. Background technique [0002] Confined fissure water is located below the surface and filled between two stable water-resisting layers. The groundwater in bedrock fissures has a certain pressure because it is confined between the two water-resisting layers. And because of the discontinuous distribution of the fissures, each has its own independent system, supply and discharge conditions. Therefore, this kind of water movement is complex and the water volume changes greatly, which brings great difficulties to the construction of deep foundations. [0003] Crack water in the rock foundation will cause seepage damage to the concrete structure, especially the improper handling of the back cover during the construction process will cause quality accidents in the construction of the co...

AI Technical Summary

Problems solved by technology

[0004] At present, there are two common sealing methods for rock foundations with pressure-bearing fissure water: one of which is to use consolidation and curtain grouting to treat rock foundations, and then seal the bottom of low-grade concrete cushions. The commonly used measures of water can completely deal with foundation leakage, but the back sealing method takes a long time and has high cost; another back sealing method is to flatly lay a graded sand and gravel permeable cushion, and then cover the bottom with a low-grade concrete cushion. The construction time of the back-sealing method is short, but the sand and gravel permeable cushion layer of this back-sealing method is prone to seepage damage, resulting in voids in the cushion layer, and the quality cannot be guaranteed

[0005] After searching, it is found that there are few studies on the back sealing method of the rock foundation's pressurized fissure water in the prior art. Therefore, it is urgent to provide a kind of back sealing method of the rock foundation's pressure fissure water, so as to exclude this kind of groundwater and create conditions for foundation construction.

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