Tunnel arch foot circumferential high pressure jet strengthening method and construction equipment

A technology of high-pressure jetting and construction equipment, applied in tunnels, mining equipment, earthwork drilling and mining, etc., can solve problems such as water blocking, soil retention and sand consolidation, and achieve the effect of reducing reinforcement costs, ensuring integrity, and a good water-proof and sand-fixing curtain

Inactive Publication Date: 2013-04-24
BEIJING SHOUER ENG TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method and construction equipment for strengthening the arch foot of a tunnel by high-pressure spraying in the circumferential direction. The stability of the rock at the junction of the arch foot can also form a closed curtain, which can block water, retain soil and consolidate sand.

Method used

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  • Tunnel arch foot circumferential high pressure jet strengthening method and construction equipment
  • Tunnel arch foot circumferential high pressure jet strengthening method and construction equipment
  • Tunnel arch foot circumferential high pressure jet strengthening method and construction equipment

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Embodiment Construction

[0037] Examples see figure 2 with image 3 As shown, among them, figure 2 The dotted line in represents the trajectory of the curved drill pipe in the construction equipment. A high-pressure injection reinforcement method for tunnel arch foot ring, the steps are as follows:

[0038]Step 1: Take the excavated upper step or middle step as the construction step surface 16, use a hole opener to symmetrically tunnel axis on both sides of the construction step surface 16, and drill two rows of arc-shaped drill pipes 10 into the ground according to the design requirements 14;

[0039] Step 2, fix the rack guide rail 5 on the left side of the construction step surface 16 according to the installation size, fix the rack 4 with the fixed carriage 6 and the movable carriage 7 on the rack guide rail 5, and complete the first The arc-shaped drill pipe 10, the nozzle 20, the high-pressure water pipe 11, and the high-pressure cement slurry pipe 21 are connected, and then the clamper 9 ...

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Abstract

The invention relates to a tunnel arch foot circumferential high pressure jet strengthening method and a construction equipment. The construction equipment comprises a rack guide rail, a rack, an arc slideway, a movable sliding frame, a fixed sliding frame, a hydraulic oil cylinder, an arc drill rod, a high pressure pump station and a hydraulic pump station, wherein the feeding and retracement of the arc drill rod are controlled by the hydraulic oil cylinder; when the arc drill rod is fed, the hydraulic pump station jets high pressure water; when the arc drill rod is retraced, high pressure cement paste is jet through high pressure; and a left overlapping region, a left side circumferential strengthening bottom plate, a middle overlapping region, a right side circumferential strengthening bottom plate and a right overlapping region form a closed strengthening circle at the bottom part of a tunnel, thus effectively solving the strengthening problems of a tunnel arch foot and an inverted arch part under the condition of weak surrounding rocks and particularly saturated silt-fine stones.

Description

technical field [0001] The invention relates to an advance reinforcement method and equipment in tunnel construction, in particular to an advance reinforcement method and equipment for ensuring the safety of arch foot parts. Background technique [0002] At present, tunnel construction in weak surrounding rock is still a difficult problem, especially in strata like saturated siltstone, due to its low permeability and weak cementation, it is difficult to use the usual grouting method to be effective, and the stratum is disturbed during excavation. Water gushes and sand gushes and loses stability. An effective advanced reinforcement method for this kind of stratum is to adopt the horizontal jet grouting process, that is, to construct one or more rings of horizontal jet grouting piles outside the excavation contour line before excavation of the tunnel to form an arch support and play a waterproof and waterproof role. seepage effect. However, due to the limitation of mechanic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/10E21D9/00
Inventor 杨积凯聂政熊
Owner BEIJING SHOUER ENG TECH
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