A treatment method for water seepage at the bottom of a side ditch wall of a high-speed railway tunnel

Abstract

A method for treating water seepage at the bottom of the side ditch wall in high-speed railway tunnels is disclosed. This method primarily addresses the problem of localized water leakage at the bottom of the side ditch walls. The procedure involves identifying the water outlet at the bottom of the side ditch wall, drilling a hole in the outer wall of the ditch, and embedding a second horizontal water guide pipe within the hole. The inner end of the second horizontal water guide pipe connects to the side ditch. A first groove is created in the side ditch wall, and a vertical water guide pipe is embedded within this groove. The upper end of the vertical water guide pipe connects to the second horizontal water guide pipe, and the lower end connects to the first horizontal water guide pipe via an elbow and tee, or via a third water guide pipe embedded in the second groove. A water-retaining platform is installed within the side ditch. A staggered perforation is drilled at the top of the third water guide pipe. When water seeps from the bottom of the side ditch wall, a third groove is created downwards within the semi-circular drainage channel at the seepage location. A water guide pipe with staggered perforations at the top is embedded within this third groove and connects to the downstream first horizontal water guide pipe. The advantage is that it effectively solves the problem of water seepage at the bottom of the side ditch wall.

Description

Technical fields:

[0002] This invention relates to a method for treating water seepage at the bottom of the side ditch wall in a high-speed railway tunnel. Background technology:

[0004] In recent years, with the rapid development of high-speed railway tunnel construction in my country, after the completion of some tunnels, the water system inside the mountain has been redistributed. Due to the failure of the waterproofing system of the tunnel side ditch and the blockage of the drainage system, local water leakage has occurred at the bottom of the side ditch wall, posing a safety hazard. Summary of the Invention:

[0006] This invention proposes a method for treating water seepage at the bottom of the side ditch wall in high-speed railway tunnels, in order to solve the problem of water seepage at the bottom of the side ditch wall in high-speed railway tunnels and eliminate safety hazards.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] The main reason for water leakage at the bottom of the side ditch wall is that the bedrock fissure water behind each lining plate flows into the side ditch through the circumferential and longitudinal drainage pipes. The transverse water guide pipe that leads to the central water ditch in the side ditch is blocked, causing the water to flow downstream of the tunnel along the side ditch. It passes through the construction joint. Because the waterproof strip at the construction joint of the side ditch is ineffective, it seeps into the bottom of the side ditch wall along the construction joint between the side ditch and the secondary lining.

[0009] The specific method is as follows:

[0010] (1) First, confirm the location of the water outlet at the bottom of the side ditch on site.

[0011] (2) Locate the water pipe pre-buried in the side ditch to connect to the central ditch and clear it to guide the water flow to the central ditch.

[0012] (3) If the water pipe is blocked and cannot be cleared, find the first horizontal water pipe (i.e. the pre-embedded horizontal water pipe leading to the inspection well) in the invert filling of the downstream of the water outlet. Use a water drill to drill a hole in the outer wall of the side ditch at the height of the bottom of the side ditch above the first horizontal water pipe. The upper edge of the hole is higher than the height of the bottom of the side ditch. Then, bury a second horizontal water pipe of φ100mm PVC in the hole. The inner end of the second horizontal water pipe is connected to the side ditch. Open the first groove on the side ditch wall at the outer end of the second horizontal water pipe. The bottom of the first groove is 20cm lower than the bottom of the existing semi-circular drainage ditch. The outer side of the first groove (the side facing the central water ditch) has an opening. The length of the inner side of the first groove is greater than the length of the opening on the outer side. That is, the first groove is a trapezoidal groove with a wider inner side and a narrower outer side.

[0013] A φ100mm PVC vertical water guide pipe is buried in the first groove. The upper end of the vertical water guide pipe is connected to the second horizontal water guide pipe through an elbow. The elbow of the first horizontal water guide pipe leading to the inspection well buried in the existing semi-circular drainage ditch is changed to a tee. One horizontal port of the tee is connected to the first horizontal water guide pipe, and the other horizontal port of the tee is connected to the bottom of the vertical water guide pipe through an elbow. The vertical port of the tee is located in the existing semi-circular drainage ditch. The water is led to the central ditch through the first horizontal water guide pipe. The drainage slope of both horizontal drainage pipes is not less than 3%.

[0014] Four φ8mm steel bars were horizontally inserted and two vertically inserted into the outer side of the vertical water guide pipe in the first groove (insertion depth 10cm, anchored using Class A anchoring adhesive). The groove was filled and repaired with high-strength repair mortar containing epoxy resin adhesive, restoring the surface color difference after repair. At the same time, a first water-retaining platform of 5×3cm (height×width) was added in the side ditch. The two ends of the first water-retaining platform contacted the side wall of the side ditch. The first water-retaining platform was located downstream of the connection between the second horizontal water guide pipe and the side ditch to ensure that the outflowing water was discharged into the central ditch.

[0015] (4) After the above solution is completed, check whether there is water leakage at the upstream construction joint. If there is water leakage, the treatment method of the side ditch at the construction joint is roughly the same as that in (3).

[0016] That is, a water drill is used to drill a hole inward into the outer wall of the side ditch above the leak location at the height of the bottom of the side ditch. The upper edge of the drill hole is higher than the height of the bottom of the side ditch. A second horizontal water guide pipe is buried. The inner end of the second horizontal water guide pipe is connected to the water guide pipe pre-buried in the side ditch to connect the central water ditch. A first groove is opened on the side ditch wall at the outer end of the second horizontal PVC water guide pipe. The bottom of the first groove is 20cm lower than the bottom of the existing semi-circular drainage ditch. The outer side of the first groove has an opening. The length of the inner side of the first groove is greater than the length of the opening on the outer side. That is, the first groove is a trapezoidal groove that is wider inside and narrower outside.

[0017] A φ100mm PVC vertical water guide pipe is embedded in the first groove, and the upper end of the vertical water guide pipe is connected to the second horizontal water guide pipe through an elbow.

[0018] A second groove is cut downwards at the bottom of the longitudinal semi-circular drainage channel between the construction joint leakage location and the first transverse water guide pipe. The depth of the second groove is 20cm, and the width of the bottom of the second groove is greater than the opening width at the bottom of the semi-circular drainage channel. That is, the second groove is a trapezoidal groove that is wider at the bottom and narrower at the top. A longitudinal φ100mm PVC third water guide pipe is buried in the second groove. A quincunx hole is drilled at the top of the third water guide pipe and geotextile is wrapped around it. One end of the third water guide pipe is connected to the vertical water guide pipe through an elbow, and the other end of the third water guide pipe is connected to the first transverse water guide pipe pre-embedded at the bottom of the side ditch wall.

[0019] The staggered holes at the top of the third water pipe allow seepage water along the construction joint at the bottom of the side ditch to penetrate into the pipe. The geotextile wrapping prevents impurities in the seepage water from clogging the staggered holes of the water pipe, thus serving a filtering function.

[0020] The drainage slope of the third water pipe shall not be less than 3%.

[0021] Then, high-strength repair mortar containing epoxy resin adhesive was used to grout and repair the second groove, ensuring that the drainage slope of the semi-circular drainage channel at the bottom of the side ditch met the longitudinal drainage slope requirements of the tunnel. After repair, the surface color difference was restored. At the same time, a second water-retaining platform of 5×3cm (height×width) was added in the side ditch. The two ends of the second water-retaining platform contacted the side wall of the side ditch. The second water-retaining platform was located downstream of the connection between the second transverse water guide pipe and the side ditch to ensure that the water discharged through the borehole was discharged into the central water ditch.

[0022] (5) If water seeps into the bottom of the side ditch wall, a third groove 15cm wide is dug downwards in the existing semi-circular drainage channel at the seepage location. The depth of the third groove extends to the top of the inverted arch before the leveling layer is constructed. A 100mm PVC water pipe (wrapped with geotextile) with quincunx holes at the top is buried in the third groove and connected to the first transverse water pipe downstream. The drainage slope of the water pipe is not less than 3%. Then, high-strength repair mortar containing epoxy resin is used to repair the groove, and the drainage slope of the semi-circular drainage channel at the bottom of the side ditch is ensured to meet the longitudinal drainage slope requirements of the tunnel. After repair, the surface color difference is restored.

[0023] The advantages of this invention are:

[0024] The construction process is simple, convenient, safe and feasible. It can be used to treat water leakage in the side ditch before and after the construction of the ballastless track bed in the tunnel. It can effectively solve the problem of water seepage at the bottom of the side ditch wall caused by the blockage of the water pipe and the inability to effectively drain water. It can also eliminate the safety hazards such as water seepage erosion and frost heave of the ballastless track structure and ensure the safety of train operation. Attached image description:

[0026] Figure 1 This is a plan view of the side wall grooved pipe embedding in Embodiment 1 of the present invention;

[0027] Figure 2 This is a cross-sectional view of the side wall grooved pipe embedding in Embodiment 1 of the present invention;

[0028] Figure 3 This is a plan view of the side wall grooved pipe embedding in Embodiment 2 of the present invention;

[0029] Figure 4 This is a cross-sectional view of the side wall grooved pipe embedding in Embodiment 2 of the present invention;

[0030] Figure 5 This is a plan view of the seepage treatment state at the bottom of the side ditch wall in Embodiment 3 of the present invention. Detailed implementation method:

[0032] Example 1;

[0033] See Figure 1 and Figure 2 First, confirm the location of the water outlet at the bottom of the wall of side ditch 1 on site, find the water pipe pre-embedded in the side ditch connecting to the central ditch and clear it, so that the water can be directed to the central ditch. If the water pipe is blocked and cannot be cleared, find the first horizontal water pipe 2 pre-embedded in the bottom of the side ditch wall (i.e., the pre-embedded horizontal water pipe leading to the inspection well) at the location of the inspection well in the inverted arch filling downstream of the water outlet. Above the first horizontal water pipe, at the height of the bottom of the side ditch, use a water drill to drill a hole inward in the outer wall of the side ditch. The upper edge of the hole is higher than the height of the bottom of the side ditch. Then, bury the second horizontal water pipe 3 of φ100mm PVC in the hole. The inner end of the second horizontal water pipe is connected to the side ditch. Open the first groove 4 on the side ditch wall at the outer end of the second horizontal water pipe. The bottom of the first groove is 20cm lower than the bottom of the existing semi-circular drainage ditch 5. The outer side of the first groove (the side facing the central ditch) has an opening. The length of the inner side of the first groove is greater than the length of the opening on the outer side. That is, the first groove is a trapezoidal groove that is wider inside and narrower outside.

[0034] A φ100mm PVC vertical water guide pipe 6 is buried in the first groove. The upper end of the vertical water guide pipe is connected to the second horizontal water guide pipe through an elbow. The elbow of the first horizontal water guide pipe leading to the inspection well buried in the existing semi-circular drainage ditch is changed to a tee 7. One horizontal port of the tee is connected to the first horizontal water guide pipe, and the other horizontal port of the tee is connected to the bottom of the vertical water guide pipe through an elbow. The vertical port of the tee is located in the existing semi-circular drainage ditch, and the water is led to the central ditch through the first horizontal water guide pipe. The drainage slope of both horizontal drainage pipes is not less than 3%.

[0035] Four horizontal and two vertical φ8mm steel bars 8 are inserted into the outer side of the vertical water guide pipe in the first groove (insertion depth 10cm, anchored with Class A anchoring adhesive). The groove is filled and repaired with high-strength repair mortar containing epoxy resin adhesive, restoring the surface color difference after repair. At the same time, a first water-retaining platform 9 of 5×3cm (height×width) is added in the side ditch. The two ends of the first water-retaining platform contact the side wall of the side ditch. The first water-retaining platform is located downstream of the connection between the second horizontal water guide pipe and the side ditch to ensure that the water discharged is discharged into the central ditch.

[0036] Example 2;

[0037] See Figure 2 and Figure 3 After the solution in Example 1 is completed, check whether there is water leakage at the upstream construction joint. If there is water leakage, the treatment method for the side ditch at the construction joint is roughly the same as that in Example 1.

[0038] That is, a water drill is used to drill a hole inward into the outer wall of the side ditch at the height of the bottom of the side ditch above the leak location. The upper edge of the drill hole is higher than the height of the bottom of the side ditch. A second horizontal water guide pipe 3 is buried. The inner end of the second horizontal water guide pipe is connected to the side ditch. A first groove 4 is opened on the side ditch wall at the outer end of the second horizontal water guide pipe. The bottom of the first groove is 20cm lower than the bottom of the existing semi-circular drainage ditch 5. The outer side of the first groove has an opening. The length of the inner side of the first groove is greater than the length of the opening on the outer side. That is, the first groove is a trapezoidal groove that is wider inside and narrower outside.

[0039] A φ100mm PVC vertical water guide pipe 6 is embedded in the first groove, and the upper end of the vertical water guide pipe is connected to the second horizontal water guide pipe through an elbow.

[0040] At the point of water leakage at the construction joint and between the first transverse water guide pipe 2, a second groove 12 is opened downward from the bottom of the existing semi-circular drainage channel 5. The depth of the second groove is 20cm, and the width of the bottom of the second groove is greater than the opening width at the bottom of the semi-circular drainage channel. That is, the second groove is a trapezoidal groove that is wider at the bottom and narrower at the top. A third longitudinal φ100mm PVC water guide pipe 10 is embedded in the second groove. A quincunx hole is drilled at the top of the third water guide pipe and geotextile is wrapped around it. One end of the third water guide pipe is connected to the vertical water guide pipe through an elbow, and the other end of the third water guide pipe is connected to the first transverse water guide pipe 2 pre-embedded at the bottom of the side ditch wall.

[0041] The staggered holes at the top of the third water pipe allow seepage water along the construction joint at the bottom of the side ditch to penetrate into the pipe. The geotextile wrapping prevents impurities in the seepage water from clogging the staggered holes of the water pipe, thus serving a filtering function.

[0042] The drainage slope of the third water pipe shall not be less than 3%.

[0043] Then, high-strength repair mortar containing epoxy resin adhesive is used to grout and repair the second groove, ensuring that the drainage slope of the semi-circular drainage channel at the bottom of the side ditch meets the longitudinal drainage slope requirements of the tunnel. After repair, the surface color difference is restored. At the same time, a second water-retaining platform 11 of 5×3cm (height×width) is added in the side ditch. The two ends of the second water-retaining platform are in contact with the side wall of the side ditch. The second water-retaining platform is located downstream of the connection between the second transverse water guide pipe and the side ditch to ensure that the water discharged is discharged into the central water ditch through the borehole.

[0044] Example 3;

[0045] See Figure 5The treatment method for water seepage at the bottom of the side ditch wall involves creating a third groove 14, 15cm wide, downwards within the existing semi-circular drainage channel 5 at the seepage location. The depth of the third groove extends to the top of the inverted arch before the leveling layer is constructed. A 100mm PVC water pipe 13 (covered with geotextile) with perforated holes at the top is embedded within the third groove and connected to the downstream first transverse water pipe 2. The drainage slope of the water pipe is no less than 3%. Then, high-strength repair mortar containing epoxy resin is used to repair the groove, ensuring that the drainage slope of the semi-circular drainage channel at the bottom of the side ditch meets the longitudinal drainage slope requirements of the tunnel. After repair, the surface color difference is restored.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for treating water seepage at the bottom of the side ditch wall in a high-speed railway tunnel, characterized by: First, confirm the location of the water outlet at the bottom of the side ditch wall on-site. Locate and clear the pre-embedded water pipe connecting to the central ditch within the side ditch to direct the water flow to the central ditch. If the water pipe is blocked and cannot be cleared, locate the first horizontal water pipe pre-embedded at the bottom of the side ditch wall at the location of the inspection well within the invert filling downstream of the water outlet. Above the first horizontal water pipe, at the height corresponding to the bottom of the side ditch, use a water drill to drill a hole inward into the outer wall of the side ditch, with the upper edge of the hole higher than the bottom of the side ditch. Then, bury the second horizontal water pipe in the hole. The inner end of the second horizontal water pipe is connected to the side ditch. Create a first groove in the side ditch wall at the outer end of the second horizontal water pipe. The bottom of the first groove should be lower than the bottom of the existing semi-circular drainage ditch. The outer side of the first groove has an opening, and the length of the inner side of the first groove is greater than the length of the opening on the outer side, that is, the first groove is a trapezoidal groove that is wider inside and narrower outside; a vertical water guide pipe is buried in the first groove, and the upper end of the vertical water guide pipe is connected to the second horizontal water guide pipe through an elbow. The elbow of the first horizontal water guide pipe buried in the existing semi-circular drainage ditch leading to the inspection well is changed to a tee. One horizontal port of the tee is connected to the first horizontal water guide pipe, and the other horizontal port of the tee is connected to the bottom of the vertical water guide pipe through an elbow. The vertical port of the tee is located in the existing semi-circular drainage ditch, and the water is led to the central ditch through the first horizontal water guide pipe. The drainage slope of both horizontal drainage pipes is not less than 3%. Four horizontal and two vertical reinforcing bars are inserted into the outside of the vertical water guide pipe in the first groove. The groove is filled and repaired with epoxy resin adhesive mortar. At the same time, a first water-retaining platform is added in the side ditch. The two ends of the first water-retaining platform are in contact with the side wall of the side ditch. The first water-retaining platform is located downstream of the connection between the second horizontal water guide pipe and the side ditch to ensure water discharge. After the above work is completed, check whether there is any leakage at the upstream construction joint. If there is leakage, use a water drill to drill a hole inward on the outer wall of the side ditch at the height of the bottom of the side ditch above the leakage location. The upper edge of the drill hole is higher than the height of the bottom of the side ditch. Bury a second horizontal water guide pipe. The inner end of the second horizontal water guide pipe is connected to the side ditch. Open a first groove on the side ditch wall at the outer end of the second horizontal water guide pipe. The bottom of the first groove is lower than the bottom of the existing semi-circular drainage ditch. The outer side of the first groove has an opening. The length of the inner side of the first groove is greater than the length of the opening on the outer side. That is, the first groove is a trapezoidal groove that is wider inside and narrower outside. A vertical water guide pipe is embedded in the first groove, and the upper end of the vertical water guide pipe is connected to the second horizontal water guide pipe through an elbow. At the point of leakage in the construction joint, a second groove is cut downwards from the bottom of the existing semi-circular drainage channel between the construction joint and the first transverse drainage pipe. The width of the bottom of the second groove is greater than the width of the opening of the second groove at the bottom of the semi-circular drainage channel, i.e., the second groove is a trapezoidal groove that is wider at the bottom and narrower at the top. A third longitudinal drainage pipe is embedded in the second groove. A staggered pattern of holes is drilled at the top of the third drainage pipe and geotextile is wrapped around it. One end of the third drainage pipe is connected to the vertical drainage pipe through an elbow, and the other end of the third drainage pipe is connected to the first transverse drainage pipe pre-embedded at the bottom of the side ditch wall. The drainage slope of the third drainage pipe is not less than 3%. Then, epoxy resin adhesive mortar is used to grout and repair the second groove, and ensure that the drainage slope of the existing semi-circular drainage channel at the bottom of the side ditch meets the requirements of the longitudinal drainage slope of the tunnel; at the same time, a second water-retaining platform is added in the side ditch, with both ends of the second water-retaining platform in contact with the side wall of the side ditch. The second water-retaining platform is located downstream of the connection between the second transverse water guide pipe and the side ditch to ensure water discharge. For water seepage at the bottom of the side ditch wall, a third groove is dug downwards within the existing semi-circular drainage channel at the bottom of the side ditch at the seepage location. The depth of the third groove extends to the top of the inverted arch before the leveling layer is constructed. A water guide pipe with staggered holes at the top is embedded in the third groove, and the water guide pipe is wrapped with geotextile. The other end of the water guide pipe is connected to the downstream first transverse water guide pipe. The drainage slope of the water guide pipe is not less than 3%. Then, the third groove is repaired with epoxy resin adhesive mortar, ensuring that the drainage slope of the semi-circular drainage channel at the bottom of the side ditch meets the longitudinal drainage slope requirements of the tunnel.

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