Stratum reinforcement psc construction method

Abstract

The invention discloses a stratum reinforcement PSC construction method which comprises the following construction steps: lofting hole sites; performing first hole construction; determining slurry proportion; performing stratum drainage construction; performing stratum reinforcement grouting; repeating the previous steps, thereby finishing all the stratum reinforcement PSC construction steps. The stratum reinforcement PSC construction method has the beneficial effects that equipment used in the stratum reinforcement method is relatively small in size and flexible in movement among hole sites; the slurry consolidation time can be regulated according to practical situations; the slurry penetrability is favorable; the slurry can be consolidated under the condition of circulating water, is difficult to dissolve and good in water stop effect; the reinforcement method is applicable to various strata, wide in application range, good in environment-friendly functional effect, less in environment pollution, good in safe operation function and high in construction speed; by virtue of adopting the technology for construction, the construction process includes advancing-type construction and backing-type construction, additional hole guiding is not needed, the additional hole guiding time is saved, and hole collapse is avoided; the preparation of construction is simple, around-the-clock construction can be performed and the engineering cost is low.

Description

technical field [0001] The invention relates to the field of stratum reinforcement construction, in particular to a stratum reinforcement PSC construction method. Background technique [0002] Domestic tunnel shield construction ends and building ground reinforcement methods are mainly improved, replaced, extruded and other main reinforcement methods. In the prior art, the purpose of stratum reinforcement is achieved through grouting with rotary grouting piles and sleeve valve pipes. For the water-rich gravel stratum, there is no safe, economical, efficient and mature stratum treatment construction method in the existing reinforcement methods. [0003] There is currently one prior art related to the invention in China. The applicants are China Railway Second Bureau Co., Ltd. and China Railway Second Bureau First Engineering Co., Ltd., and the patent application number is 201110064110.0. The invention patent "construction method for foundation reinforcement in soft soil area...

AI Technical Summary

Problems solved by technology

At present, this construction method is only grouting after opening holes on the ground, without improving the soil layer, and the overall strength after construction has not been substantially improved. This construction method cannot meet the increasingly higher construction requirements.