Positioning grouting reinforcement method for groundwater seepage damage control in foundation pit engineering

Abstract

The invention discloses a positional grouting reinforcement method for controlling groundwater seepage damage in foundation pit engineering. The method is divided into two different degrees: in the case of a small seepage damage range, drilling obliquely through drainage grouting conduits Hole insertion or oblique jacking into the seepage damage area for treatment; in the case of a large seepage damage range, the vertical drilling and insertion or jacking of the seepage damage area through the drainage drainage positioning grouting conduit is carried out for rapid treatment, and then the drainage is injected into the damage area. The slurry pipe is drilled obliquely or inserted obliquely into the seepage damage area for consolidation and treatment. The invention treats the seepage damage of groundwater in the foundation pit project according to the situation, realizes high-efficiency treatment, and saves construction cost and construction period.

Description

technical field [0001] The invention relates to the field of treatment of groundwater seepage damage, in particular to a positional grouting reinforcement method for treatment of groundwater seepage damage in foundation pit engineering. Background technique [0002] Complex groundwater seepage in riverside and coastal areas poses a great threat to the safety of foundation pit engineering. Existing research statistics show that more than 60% of foundation pit accidents are directly or indirectly related to groundwater, and groundwater seepage is the cause of foundation pit engineering accidents. One of the main reasons is that foundation pit engineering accidents caused by groundwater seepage damage mainly include damage to the enclosure structure caused by foundation pit seepage damage, water accumulation in the pit, and cracks in structures outside the pit and roads. When the seepage damage area of ​​the foundation pit is small, it may cause construction inconvenience and l...

AI Technical Summary

Problems solved by technology

The above-mentioned traditional methods for prevention and control of groundwater seepage damage in foundation pit engineering have the following deficiencies: 1. Adopting backfill and weight control method, it is necessary to clear the seepage damage area first, and then use heavy machinery to transport sand (or concrete) to the site. The treatment period is long, and even the best treatment period is missed, resulting in poor treatment effects; 2. When using backfill soil treatment, the construction site must be able to carry heavy mechanical devices and meet the requirements of the working space for the normal operation of the machinery, that is, for the project site There are certain requirements for the bearing capacity of the foundation and the working space. This treatment method has a small scope of application and has limitations; 3. The project cost of this treatment method is high, and the treatment time is long. The removal of overburden soil in the later stage will also increase construction costs and prolong duration

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