Rapid pre-reinforcement grouting method for excavation of tunnel face of deeply-buried high-pressure water-rich tunnel

A technology for water-rich tunnels and face surfaces, which is used in tunnels, tunnel linings, and earth-moving drilling and mining, etc., can solve the problems of a large number of drilling holes for curtain grouting, poor grouting reinforcement effect, and high grouting construction strength. The effect of reducing the number of disasters, shortening the time-consuming work, and ensuring safe and smooth connection

CN113137250APending Publication Date: 2021-07-20ZHONGJIAN SUIDAO CONSTR CO LTD +1
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-07-20

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a rapid pre-reinforcement grouting method for excavation of the tunnel face of a deeply-buried high-pressure water-rich tunnel. The rapid pre-reinforcement grouting method for excavation of the tunnel face of the deeply-buried high-pressure water-rich tunnel comprises the following steps that tunnel surrounding rock parameters are determined, and a hole distance is calculated according to the surrounding rock parameters; a drilling scheme is determined according to the section area of the tunnel; drilling is conducted in different areas and steps according to the drilling scheme, and drilling is stopped when the drilling depth is reached; a high-pressure water jet device is started, rock mass within the drilling length range is cut through drilling arm hole high-pressure water, and a pre-fracture is generated to form a slurry diffusion channel; a grouting device is started, rapid initial setting grout is pressed into the rock mass, and rapid diffusion of the grout to the excavation face is achieved through the pressure difference between the rock mass and the excavation face of the tunnel; and the grouting effect is checked, and whether the grout is reinjected or not is judged according to the tunnel face surrounding rock water seepage condition. According to the rapid pre-reinforcement grouting method for excavation of the tunnel face of the deeply-buried high-pressure water-rich tunnel, on-site dynamic regulation and control can be achieved, the pressure difference between fracture water and the excavation face is fully utilized, the number of drilled holes is reasonably optimized, the time consumption is shortened, grouting materials are saved, the disaster occurrence frequency is effectively reduced, and it is ensured that the high-pressure water-rich tunnel safely communicate.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of tunnel engineering construction, in particular to a rapid pre-reinforcement grouting method for tunnel face excavation of deep-buried high-pressure water-rich tunnels. Background technique

[0002] With the continuous advancement of the western development, the infrastructure construction in the southwest region has developed rapidly, and tunnels have been built in various places. In some parts of Southwest China, the rock mass properties and hydrological conditions contributed to the formation of karst landforms; under the geological conditions of karst landforms, when tunnels are built through karst-developed areas, water and mud inrush often occur. Engineering disasters: A large amount of groundwater pouring into the tunnel will cause mechanical equipment damage and casualties, increase the project cost, and delay the construction period; once water and mud inrush occur, it will consume a lot of financ...

Examples

Embodiment

[0040] Such as figure 1 As shown, the rapid pre-reinforcement grouting plugging method for excavating the face of a deep-buried high-pressure water-rich tunnel includes the following steps:

[0041] S1. Determine the surrounding rock parameters of the tunnel, and calculate the hole distance according to the surrounding rock parameters.

[0042] TSP advanced geophysical prospecting technology is used to determine the parameters of the surrounding rock of the tunnel, combined with grouting materials to obtain multiple physical and mechanical parameters, including: rock mass permeability coefficient, rock mass Poisson's ratio, rock mass elastic modulus, viscosity ratio, and porosity. The hole distance is calculated according to the surrounding rock and grouting material parameters, as follows:

[0043] (1) Calculation of hole distance

[0044] S11. According to the scope of grouting reinforcement, the calculation formula of the hole distance is as follows:

[0045]

[0046]...