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CN-121976851-A - Karst area tunnel water-gushing treatment construction method

CN121976851ACN 121976851 ACN121976851 ACN 121976851ACN-121976851-A

Abstract

The invention relates to the technical field of tunnel engineering, and discloses a karst area tunnel water-gushing treatment construction method, wherein drainage pipes are respectively arranged on two inner side walls of a tunnel in advance and are positioned at the lower part of the tunnel; when water burst occurs on the inner side wall of the tunnel, a fixing base is arranged on the inner side wall of the tunnel, a sealing cover sleeved on the drainage tube and the fixing base are sealed and closed, so that the fixing base and the sealing cover form a sealing cavity, a grouting pipeline is connected between the sealing cavity and the grouting pump in a sealing mode, grouting materials are injected into the sealing cavity through the cooperation of the grouting pump and the grouting pipeline, along with continuous increase of the grouting materials in the sealing cavity, the grouting materials in the sealing cavity penetrate through one or more groups of grouting rings to perform grouting in all grouting holes, the situation that the grouting materials overflow during grouting can be effectively avoided, the water burst area can be fully grouted, and the occurrence of gaps or uneven grouting is reduced.

Inventors

  • YUAN JINBO
  • ZHANG LILI
  • WANG QINGSHAN
  • BI YE
  • WANG ZHENXING
  • LI HANG
  • LI XIANGDA
  • SHU PENGFEI
  • Sun Liukui
  • WANG JUAN

Assignees

  • 中建七局交通建设有限公司
  • 中国建筑第七工程局有限公司
  • 中建七局建设发展有限公司

Dates

Publication Date
20260505
Application Date
20260116

Claims (8)

  1. 1. A karst area tunnel water burst treatment construction method is characterized by comprising the following steps: S1, respectively installing drain pipes (2) on two inner side walls of a tunnel (1) in advance, wherein the drain pipes (2) are positioned at the lower part of the tunnel (1); S2, when water gushing (7) occurs on the inner side wall of the tunnel (1), a fixed base (4) is arranged on the inner side wall of the tunnel (1), and a water flowing port (401) in the center of the fixed base (4) is opposite to the water gushing point; S3, drilling a water flowing hole (5) through the water flowing hole (401) on the inner side wall of the tunnel (1), and sealing and connecting a drainage tube (6) between the water flowing hole (401) and the drainage tube (2) so that water inflow (7) is discharged into the drainage tube (2) through the water flowing hole (5), the water flowing hole (401) and the drainage tube (6) in sequence, and discharging the water inflow (7) to a designated position through the drainage tube (2) and carrying out centralized treatment; S4, drilling grouting holes (8) on the inner side wall of the tunnel (1) in one or more groups of grouting rings (402) according to the water inflow, and injecting grouting materials (11) with different amounts according to the number of the grouting holes (8); S5, sealing and closing a sealing cover (9) sleeved on the drainage tube (6) and the fixed base (4) to enable the fixed base (4) and the sealing cover (9) to enclose a sealing cavity (10), sealing and connecting a grouting pipeline between the sealing cavity (10) and the grouting pump, injecting grouting materials (11) into the sealing cavity (10) through the cooperation of the grouting pump and the grouting pipeline, and extruding the grouting materials (11) in the sealing cavity (10) through one or more groups of grouting rings (402) along with continuous increase of the grouting materials (11) in the sealing cavity (10) to perform grouting in all grouting holes (8), so that part of grouting materials (11) are prevented from overflowing from the rest grouting holes (8) in the grouting process; s6, after grouting is completed, opening a sealing cover (13) at the bottom of the sealing cover (9), and discharging the residual grouting material (11) in the sealing cavity (10) from a bottom discharge port (14) of the sealing cover (9).
  2. 2. The karst area tunnel water inflow treatment construction method according to claim 1, wherein in the step S1, a plurality of clips (15) are installed on two inner side walls of the tunnel (1) before the drain pipe (2) is installed, and the drain pipe (12) is installed on the clips (15) located on the same side so as to fix the drain pipe (12).
  3. 3. The karst area tunnel water inflow treatment construction method according to claim 1 or 2 is characterized in that in the step S1, a plurality of connectors (3) are equidistantly arranged on a drain pipe (2), and the connecting ends of the connectors (3) are upwards arranged and are used for sealing and connecting drainage pipes (6).
  4. 4. The karst area tunnel water-gushing treatment construction method according to claim 1, wherein in the step S2, when the fixing base (4) is installed, a plurality of pins penetrate through the installation supports (403) on the circumferential surface of the fixing base (4) respectively and are inlaid on the inner side wall of the tunnel (1), so that the fixing base (4) is fixed.
  5. 5. The karst area tunnel water-gushing treatment construction method according to claim 1, wherein the plurality of groups of grouting rings (402) are distributed on the fixed base (4) with water-flowing ports (401) as the center, each group of grouting rings (402) is provided with grouting holes on the fixed base (4) with water-flowing ports (401) as the center at equal intervals, and the gap between every two grouting holes is at least 0.8m.
  6. 6. The karst area tunnel water-gushing treatment construction method according to claim 1, wherein when the sealing cover (9) and the fixed base (4) in the step S5 are in sealing connection, the sealing cover (9) and the fixed base (4) are mutually attached, the sealing cover (9) is rotated along the circumferential direction, and the sealing cover (9) and the fixed base (4) are in sealing connection through the matching of the internal threads of the inner side wall of the sealing cover (9) and the external threads of the circumferential surface of the base (4).
  7. 7. The karst area tunnel water burst treatment construction method is characterized by comprising the steps of after grouting materials (11) in the step S6 are completely solidified, disassembling a sealing cover (9), a drainage tube (6) and a fixing base (4) in sequence, and refilling the grouting materials (11) in a water flowing hole (5) for plugging the water flowing hole (5).
  8. 8. The karst area tunnel water inflow treatment construction method of claim 1, wherein the grouting material (11) is formed by mixing cement and water glass.

Description

Karst area tunnel water-gushing treatment construction method Technical Field The invention relates to the technical field of tunnel engineering, in particular to a tunnel water-gushing treatment construction method in karst areas. Background The tunnels are divided into five types of surrounding rocks according to different factors such as the lithology, the weathering degree and the rock quality of the surrounding rocks, the joints and the cracks of the fifth type of rock mass are extremely developed, the groundwater is rich in activity, and the surrounding rocks are unstable. When the tunnel is constructed, the situation that the tunnel passes through the surrounding rock breaking section and most of the tunnel is positioned below the ground water level is usually encountered, the surrounding rock stability around the tunnel is poor, the karst water gushing problem is serious, and the safety risk is high. When water burst occurs in the existing tunnel, a plurality of grouting holes are usually drilled in the water burst part of the tunnel, grouting materials are filled into the grouting holes one by one, if the grouting materials are solidified, the water burst point plugging work is completed, but when the grouting materials are grouted into the grouting holes by adopting the method, the fluidity of the grouting materials is relatively large, when the grouting materials are grouted into one grouting hole, part of the grouting materials are easy to overflow from other grouting holes, on one hand, the water burst area is difficult to fully grouting, the gap is easy to occur in part of the water burst area, the problem of secondary water burst is likely to occur in the follow-up, and on the other hand, part of the grouting materials directly fall onto the bottom surface of the tunnel when flowing out from the grouting holes, so that waste is caused to the grouting materials. So we propose the construction method of tunnel water treatment in karst areas, so as to solve the problems presented in the above. Disclosure of Invention The present invention aims to solve the above-mentioned technical problems. In order to achieve the purpose, the invention adopts the following technical scheme that the construction method for tunnel water burst treatment in karst areas comprises the following steps: S1, respectively installing drain pipes on two inner side walls of a tunnel in advance, wherein the drain pipes are positioned at the lower part of the tunnel; s2, when water gushes occur on the inner side wall of the tunnel, a fixed base is arranged on the inner side wall of the tunnel, and a water flowing port in the center of the fixed base is opposite to the water gushing point; S3, penetrating through the water flowing port and drilling a water flowing hole on the inner side wall of the tunnel, and sealing and connecting a drainage tube between the water flowing port and the drainage tube so that water burst sequentially passes through the water flowing port, the water flowing port and the drainage tube to be discharged into the drainage tube, and discharging the water burst to a designated position through the drainage tube and carrying out centralized treatment; S4, drilling grouting holes on the inner side wall of the tunnel in one or more groups of grouting rings according to the water inflow amount, and injecting grouting materials with different amounts according to the number of the grouting holes; S5, sealing and closing a sealing cover sleeved on the drainage tube and the fixing base to enable the fixing base and the sealing cover to form a sealing cavity, sealing and connecting a grouting pipeline between the sealing cavity and the grouting pump, and injecting grouting materials into the sealing cavity through the cooperation of the grouting pump and the grouting pipeline; And S6, after grouting is finished, opening a sealing cover at the bottom of the sealing cover, and discharging residual grouting material in the sealing cavity from a bottom discharge port of the sealing cover. Further, in the step S1, a plurality of hoops are installed on two inner side walls of the tunnel before the drain pipe is installed, and the drain pipe is installed on a plurality of hoops positioned on the same side, so that the drain pipe is fixed. In the step S1, a plurality of connectors are equidistantly arranged on the drain pipe, and the connecting ends of the connectors are upwards arranged and are used for carrying out sealing connection on the drain pipe. In the step S2, when the fixed base is installed, a plurality of pins penetrate through the installation supports on the circumferential surface of the fixed base respectively and are embedded on the inner side wall of the tunnel, so that the fixed base is fixed. Further, a plurality of groups of grouting rings are distributed on the fixed base by taking the water flowing port as the center; each group of grouting rings are grouting holes which are equidistantly arr