Karst treatment and track grouting construction method

Abstract

The invention relates to the technical field of karst treatment, and aims to provide a karst treatment and track grouting construction method. The karst treatment and track grouting construction method provided by the invention is characterized by comprising the following steps of 1) despooling for positioning: measuring two coordinate points with the closest distance between a cuboid-shaped housepile foundation bearing platform and a continuous wall, setting drill hole positions between the two coordinate points, enabling the hole positions to be arranged in the circumferential direction ofthe house pile foundation bearing platform at intervals, and marking the hole positions; 2) using a drilling machine for drilling holes; 3) replacing sleeve shell materials; 4) pre-embedding a sleevevalve tube; 5) sealing the drill holes; 6) feeding core tubes; 7) tracking: closely monitoring continuous wall deformation, a subway station circuit, house pile foundation bearing platform settling and the like, and guiding grouting according to a monitoring result; and 8) grouting, wherein through pre-embedding the sleeve valve tube and tracking grouting, the treatment time for guiding holes andpre-embedding the sleeve valve tube is saved at a later period, and the occurrence of a phenomenon that a karst cave is further enlarged due to insufficient competency of a construction team is reduced. The karst treatment and track grouting construction method provided by the invention is applicable to the protection of the subway station circuit and the house pile foundation bearing platform.

Description

technical field [0001] The invention relates to the technical field of karst cave treatment, more specifically, it relates to a karst cave treatment and tracking grouting construction method. Background technique [0002] Karst cave is a relatively common geological phenomenon. When it develops seriously, it can cause geological disasters such as large-scale ground subsidence, and bring serious safety hazards to engineering construction and underground space development. It is one of the restrictive factors for urban development. [0003] Geological structure, landform, soil layer, hydrogeology, and karst development are the decisive factors for the formation of karst caves, among which the main controlling factors are soil composition, genetic type, mineral composition, lithology, structure and its physical, mechanical and hydraulic properties, state, thickness etc. [0004] The foundation pit is an earth pit excavated at the foundation design position according to the bas...

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Problems solved by technology

[0007] However, after grouting after the karst cave is formed, the requirements for the operating level of the operators are relatively high, and the quality requirements of the construction team are too high. The mechanical vibration during work is easy to aggravate the further expansion of the cave and cause dangerous accidents. At the same time, the processing time of the lead hole and the pre-embedded sleeve valve pipe in the later stage takes a long time

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