Drilling design method for grouting reinforcement of tunnel vault surrounding rocks under urban road

Abstract

The invention discloses a drilling design method for grouting reinforcement of tunnel vault surrounding rocks under an urban road, and relates to the technical field of grouting reinforcement of the urban tunnel surrounding rocks. The technical solution of the drilling design method is characterized by comprising the following steps that S1, detecting underground pipelines of an urban road surface; S2, making a spatial distribution map of the stratum pipelines; S3, determining a grouting mode and a grouting reinforcement area range; S4, calculating and determining a drilling termination line;S5, dividing a grouting reinforcement area into different layers; S6, designing drilling point locations, drilling paths and drilling depths of different layers of the grouting reinforcement area; andS7, designing a drilling structure. According to the design method, pipeline gaps can be accurately utilized to design construction drill holes, the influence and even damage of drilling grouting construction on various pipelines are eliminated, the drilling point locations and the drilling depths of the drilled holes in different layers of the grouting reinforcement area are designed, grouting reinforcement can be conveniently carried out in sequence, leakage and loss of grout towards the earth surface and the interior of a tunnel are prevented, grouting safety can be guaranteed, and a grouting reinforcement stratum good in integrity can be further formed.

Description

technical field [0001] The invention relates to the technical field of urban tunnel surrounding rock grouting reinforcement, more specifically, it relates to a drilling design method for grouting reinforcement of tunnel vault surrounding rock under urban roads. Background technique [0002] The design and layout of urban tunnels are generally designed under urban roads and extend along urban roads due to the influence of surface buildings. When the tunnel is designed in a loose and broken stratum or a water-rich stratum, adverse geological disasters such as tunnel surrounding rock deformation, encroachment or even collapse or road surface subsidence often occur during construction. One of the effective measures to deal with unfavorable geological disasters is to strengthen the surrounding rock of the tunnel by grouting. Because urban tunnels are affected by many aspects such as municipal administration, environmental protection, and transportation, tunnel excavation is ofte...

AI Technical Summary

Problems solved by technology

Because the underground pipelines under the road surface are highly concealed, intricately distributed and locally irregular, the construction of grouting and drilling on the road surface will easily damage the pipeline, which not only affects the normal use of the pipeline, but also causes major economic losses and adverse social impact

For example, the leakage of sewage and rainwater pipelines will cause serious subsidence of the ground at the top of the tunnel, and even cause major accidents such as tunnel collapse and road surface subsidence; if power supply, heating, communication and other pipelines are damaged, it will directly affect people's livelihood, the safety of enterprises and institutions. cause other serious consequences

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