Tunnel drainage system construction method

Abstract

The present invention belongs to the technical field of tunnel drainage construction and discloses a method for constructing a tunnel drainage system. Its main technical features include the following steps: positioning longitudinal drainage pipelines, positioning transverse drainage pipelines, positioning circumferential drainage pipelines, constructing PVC extended shaping pipes, constructing S-shaped PVC shaping pipes, and constructing a leveling layer water guide trough. The components used include a drainage pipe positioning frame, a corrugated pipe clamp, and a pipe clamp plug. The tunnel drainage system construction method provided by the present invention uses various components that complement each other to position and connect the longitudinal drainage pipelines, transverse drainage pipelines, and circumferential drainage pipelines. Installation is convenient, the pipelines are neatly and firmly arranged, and the pipeline ports are tightly sealed to prevent concrete from intruding.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel drainage construction, and in particular relates to a tunnel drainage system construction method. Background Art

[0002] During tunnel construction, the continued effectiveness of drainage systems, ease of installation, and subsequent maintainability have always been challenges. Due to the limitations of the surrounding rock geology, new tunnel excavation is mostly carried out using the mining method. This involves a step-by-step approach, including excavation, support, initial concrete spraying, construction of longitudinal / circular / transverse drainage pipelines, reinforcement binding, invert arch pouring, and invert arch filling. For the concrete poured multiple times during tunnel construction, the drainage pipelines also need to be sealed with geotextiles and extended and connected again in stages. This multiple sealing process can lead to grout seepage and concrete intrusion. This can cause deformation of the drainage pipeline ports, concrete intrusion, and failure of the connecting rod heads, impacting subsequent connections. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a tunnel drainage system construction method which is convenient to install, has neat and firm pipelines, tightly sealed pipeline ports, and cannot be invaded by concrete.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention includes the following steps:

[0005] The first step is to locate the longitudinal drainage pipeline

[0006] After the initial support and re-spraying of the inverted arch is completed, the geotextile is laid and the construction of the longitudinal drainage pipeline of the low side wall is carried out;

[0007] The first step is to position multiple drainage pipe positioning frames consisting of pipe clamps, connecting rods and fixed bases on the sprayed concrete base surface with a gas nail gun. According to the depth changes of the concave and convex positions of the sprayed concrete base surface, the multiple drainage pipe positioning frames are respectively selected to use matching connecting rods, so that the center height of the pipe clamps of the multiple drainage pipe positioning frames meets the design requirements, and the upper and lower ends of the connecting rods are fixed with fastening screws;

[0008] The first point, step two, is to install the HDPE double-wall perforated corrugated pipe into the pipe clamps of multiple drainage pipe positioning frames, and adjust the positions of the two ends of the HDPE double-wall perforated corrugated pipe to make the HDPE double-wall perforated corrugated pipe meet the design requirements;

[0009] The first point is the third step. Install a tee or an elbow at the port of the HDPE double-wall perforated corrugated pipe. The tee or elbow can be of variable diameter or constant diameter as needed. The elbow is used for the port after the HDPE double-wall perforated corrugated pipe is positioned. The tee is used to connect the port when the HDPE double-wall perforated corrugated pipe is extended. The tee includes a front interface, a rear interface, and a water outlet. The front interface of the tee is connected to the HDPE double-wall perforated corrugated pipe. A pipe clamp is installed at the rear interface of the tee. The elbow includes an inlet and an outlet. The inlet is connected to the HDPE double-wall perforated corrugated pipe. Adjust the angle of the water outlet of the tee or / and the outlet of the elbow to meet the design requirements.

[0010] Step 1.4: Install circumferential short-circuit drainage blind pipes on the outside or inside of the HDPE double-wall perforated corrugated pipe at intervals. Install corrugated pipe clamps on the circumferential short-circuit drainage blind pipes at intervals. Use a gas nail gun to fix the corrugated pipe clamps to the initial sprayed concrete base surface.

[0011] Step 1.5: Install a reducer at the outlet of the annular short-circuit shaped drainage blind pipe, and install a pipe clamp plug at the inlet of the annular short-circuit shaped drainage blind pipe;

[0012] Step 1.6: Install the PVC shaped pipe into the water outlet of the tee joint and / or the outlet of the elbow and the port of the reducer, matching the position of the water outlet of the tee joint and / or the outlet of the elbow and the port of the reducer, use a gas nail gun to fix multiple drain pipe positioning frames, assemble the PVC shaped pipe into the pipe clamp of the drain pipe positioning frame, adjust the port bevel position of the PVC shaped pipe to be consistent with the tangent position of the inverted arch, and fix the upper and lower ends of the connecting rod with fastening screws;

[0013] Step 1.7: Install pipe clamps on the ends of the PVC shaped pipes;

[0014] Step 1 and 8: After laying the waterproof board and back-attaching the water stop, position the steel bars and tie the skeleton steel mesh at the inverted arch and the low side wall, install the formwork and pour the low side wall and inverted arch concrete;

[0015] Step 2: Positioning of horizontal drainage pipelines

[0016] After the invert is poured, the horizontal drainage pipeline is positioned;

[0017] The second step is to use a gas nail gun to fix multiple drain pipe positioning brackets. Use matching connecting rods for each of the multiple drain pipe positioning brackets so that the center height of the pipe clamps of the multiple drain pipe positioning brackets meets the design requirements. Use fastening screws to fix the upper and lower ends of the connecting rods.

[0018] Step 2: Install the PVC drain pipe into the pipe clamps of the multiple drain pipe positioning racks;

[0019] Step 2: Install straight-through connecting sleeves at both ends of the PVC drain pipe.

[0020] Step 2.4: Install a pipe clamp plug at the port of the straight-through connecting sleeve;

[0021] Step 2.5: Install the formwork and pour the inverted arch filling layer concrete;

[0022] Step 3: Locating the Circumferential Drainage Pipeline

[0023] After the invert arch filling and pouring is completed, reinforced concrete is used for the secondary lining of the tunnel. After the deformation of the surrounding rock is stable, geotextile is laid and the tunnel circumferential drainage system is constructed.

[0024] The third step is to remove the pipe clamp plug of the water inlet port of the annular short-circuit fixed drainage blind pipe, and align the port of the entire HDPE drainage blind pipe with the water inlet port of the annular short-circuit fixed drainage blind pipe;

[0025] Step 2 of the third point: Install a corrugated pipe clamp at the point where the end of the entire HDPE drainage blind pipe is aligned with the water inlet port of the annular short-circuit fixed drainage blind pipe, and fix the corrugated pipe clamp to the sprayed concrete base surface with a gas nail gun;

[0026] Step 3 of the third point: The entire HDPE drainage blind pipe is installed along the circumference of the sprayed concrete. Corrugated pipe clamps are installed at intervals on the entire HDPE drainage blind pipe. The corrugated pipe clamps are fixed to the concrete base surface with a gas nail gun.

[0027] Then, the waterproof sheet is laid and welded, the steel frame is tied, and the backing and embedded water stop are installed. After the lining trolley is in place, the secondary lining concrete is poured.

[0028] Step 4: Construction of PVC extension molding pipe and S-shaped PVC molding pipe

[0029] The construction of PVC extended molding pipe and S-shaped PVC molding pipe shall be carried out after the secondary lining and invert arch filling are completed;

[0030] The fourth step is to remove the pipe clamp plugs of the PVC shaped pipe and the pipe clamp plugs of the straight connecting sleeve respectively;

[0031] Step 2 of the fourth point is to use a gas nail gun to position multiple drainage pipe positioning frames on the lining concrete base surface at the place where they match the PVC shaped pipes. You can choose to use matching connecting rods according to the height changes of the base surface, so that the center height of the pipe clamps of the multiple drainage pipe positioning frames meets the design requirements, and fix the upper and lower ends of the connecting rods with fastening screws;

[0032] In the third step of the fourth point, insert the PVC extension molding pipe into the port of the PVC molding pipe and fix it in the pipe clamp of the drainage pipe positioning frame;

[0033] Step 4.4: Install a pipe clamp plug on the outlet port of the PVC extended shaped pipe;

[0034] Step 4.5: Use a gas nail gun to position multiple drainage pipe positioning brackets on the lining concrete base surface at the ports that match the straight-through connection sleeves, adjust the support angle to meet the design requirements, and fix the upper and lower ends of the connecting rods with fastening screws;

[0035] Step 4.6: Install the S-shaped PVC fitting into the straight-through connecting sleeve and secure it to the pipe clamp of the drainage pipe positioning frame;

[0036] Step 4.7: Install the pipe clamp plug at the end of the S-shaped PVC pipe;

[0037] After installation is completed, concrete is poured using a formwork trolley.

[0038] Its additional features are:

[0039] The steps include:

[0040] Step 5: Construction of water channel in leveling layer

[0041] The fifth point is to simultaneously construct the horizontal water pipes during the construction of the horizontal drainage pipelines. Use a gas nail gun to fix multiple drainage pipe positioning frames. Use matching connecting rods for each of the multiple drainage pipe positioning frames. Make sure the center height of the pipe clamps of the multiple drainage pipe positioning frames meets the design requirements. Use fastening screws to fix the upper and lower ends of the connecting rods.

[0042] Step 2 of the fifth point is to install the PVC water pipe into the pipe clamps of multiple drainage pipe positioning racks;

[0043] Step 3 of the fifth point is to use a gas nail gun to longitudinally fix multiple drainage pipe positioning frames on the surface of the inverted arch filling layer at the position matching the water inlet port of the PVC water pipe. The multiple drainage pipe positioning frames are respectively selected to use matching connecting rods, so that the center height of the pipe clamps of the multiple drainage pipe positioning frames meets the design requirements, and the upper and lower ends of the connecting rods are fixed with fastening screws;

[0044] In the fourth step of the fifth point, the PVC pre-buried pipe is fixed in the pipe clamp. The PVC pre-buried pipe blocks the water inlet port of the PVC water pipe. Concrete is poured. After the concrete is initially set, the PVC pre-buried pipe is removed. The cement scum at the water inlet port of the PVC water pipe is cleaned. The position after the PVC pre-buried pipe is removed constitutes a water channel.

[0045] The drainage pipe positioning frame includes a pipe clamp, which is connected to the fixed base through a connecting rod. The pipe clamp is an arc-shaped plate with an open upper end. The bottom end of the pipe clamp is provided with an upper insert matching the connecting rod. The fixed base is a flat plate with more than three blades. The top of the fixed base is provided with a lower insert matching the connecting rod. The upper and lower inserts are provided with fastening screws matching the connecting rod. The lower insert is vertically arranged, and the lower insert is perpendicular to the flat plate, or the lower insert is inclined, and the lower insert forms an acute angle with the flat plate.

[0046] The outer wall of the pipe clamp is provided with reinforcing ribs, and the bottom end of the pipe clamp is provided with a through hole connected to the upper insert pipe;

[0047] The corrugated pipe clamp comprises an arched pipe clamp body, with integrally bent connecting plates symmetrically arranged at both ends of the pipe clamp body, a smooth outer wall of the pipe clamp body, and a corrugated rib or two corrugated ribs arranged on the inner wall of the pipe clamp body;

[0048] The pipe clamp plug includes a pelvic cavity, an annular baffle is provided at the upper end of the pelvic cavity, and at least one corrugated rib is provided at the lower end of the pelvic cavity, the corrugated rib is composed of two or more ribs arranged intermittently, the annular baffle is arranged horizontally and parallel to the bottom surface of the pelvic cavity, or the annular baffle is arranged obliquely and forms an acute angle with the bottom surface of the pelvic cavity;

[0049] A slider is provided on the inner bottom surface of the pelvic cavity.

[0050] The tunnel drainage system construction method provided by the present invention adopts components such as drainage pipe positioning frames, corrugated pipe clamps, and pipe clamp plugs. Each component adopts a mutually complementary manner to position and connect the longitudinal drainage pipeline, the transverse drainage pipeline, and the circumferential drainage pipeline. A flat drainage pipe positioning frame, an inclined drainage pipe positioning frame, a corrugated pipe clamp for fixing, a corrugated pipe clamp for connecting, a flat pipe clamp plug, and an inclined pipe clamp plug are used as needed. It is easy to install, each pipeline is neat and firm, the pipeline ports are tightly sealed, and concrete cannot invade. A single HDPE double-wall perforated corrugated pipe is set or multiple HDPE double-wall perforated corrugated pipe is set. When a single HDPE double-wall perforated corrugated pipe is set, elbows are respectively installed at the two ends of the HDPE double-wall perforated corrugated pipe, and the tunnel drainage system is constructed in a modular manner. When multiple HDPE double-wall perforated corrugated pipes are set, adjacent HDPE double-wall perforated corrugated pipes are connected by a tee joint, and the tunnel drainage system is constructed in an integrated manner. As needed, the tee joint or elbow is of variable diameter or non-variable diameter. A water channel is set up on the leveling layer to guide the surface water generated during tunnel and track cleaning back to the central ditch.

[0051] To use the drain pipe locator, cut the connecting rod to the appropriate size and select the appropriate pipe clamp as needed. Assemble the pipe clamp, connecting rod, and fixed base together. Hold the drain pipe with the pipe clamp, secure the fixed base with a gas nail gun, and then secure the upper and lower ends of the connecting rod to the upper and lower pipes with set screws. The lower pipe is set vertically, perpendicular to the plate, and is suitable for locations with flat floors. The lower pipe is set at an angle, forming an acute angle with the plate, and is suitable for locations with inclined floors. The outer wall of the pipe clamp of the drain pipe locator is equipped with reinforcing ribs to increase the strength of the pipe clamp. The bottom end of the pipe clamp is provided with a through hole that connects to the upper pipe, facilitating the installation of the connecting rod.

[0052] A bellows clamp with a single corrugated rib on the inner wall of the clamp body serves as a fixed clamp, while a bellows clamp with two corrugated ribs on the inner wall of the clamp body serves as a connecting clamp. During use, the connecting ends of two bellows are connected using a bellows clamp with two corrugated ribs on the inner wall of the clamp body. The two corrugated ribs snap into the corrugated grooves of the two bellows, preventing the connection between the two bellows from separating or disconnecting. A single bellows is fixed at a certain distance using a bellows clamp with a single corrugated rib on the inner wall of the clamp body. The corrugated rib snaps into the corrugated groove of the single bellows, preventing the single bellows from deviating.

[0053] When the pipe clamp plug is used, the lower end of the pelvic cavity is screwed into the bellows, and the corrugated ribs at the lower end of the pelvic cavity match the corrugated grooves of the bellows. The corrugated ribs are screwed into the corrugated grooves, so that the pelvic cavity and the bellows are tightly connected. After the pelvic cavity is screwed until the annular baffle contacts the mouth of the bellows, the pelvic cavity stops screwing in, and the annular baffle seals the mouth of the bellows tightly. The corrugated ribs make the connection between the pipe clamp plug and the bellows stable, and the annular baffle seals the mouth of the bellows tightly. In addition, the pipe clamp plug can be disassembled and reused. The corrugated ribs are composed of two or more sections of ribs that are intermittently set, which can accommodate more specifications of bellows. A pull head is provided on the inner bottom surface of the pelvic cavity. Holding the pull head makes the installation and disassembly of the pipe clamp plug more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a structural diagram of the tunnel drainage system;

[0055] Figure 2 This is a schematic diagram of the end structure of the tunnel drainage system;

[0056] Figure 3 It is a structural diagram of the longitudinal drainage pipeline;

[0057] Figure 4 It is a schematic diagram of the first structure of the end of the longitudinal drainage pipeline;

[0058] Figure 5It is a schematic diagram of the second structure of the end of the longitudinal drainage pipeline;

[0059] Figure 6 It is a structural diagram of the horizontal drainage pipeline;

[0060] Figure 7 This is a schematic diagram of the first structure of the drainage pipe positioning frame;

[0061] Figure 8 This is a schematic diagram of the second structure of the drainage pipe positioning frame;

[0062] Figure 9 This is a schematic diagram of the first structure of a bellows pipe clamp;

[0063] Figure 10 Schematic diagram of the second structure of the bellows clamp;

[0064] Figure 11 This is a schematic diagram of the first structure of the pipe clamp plug;

[0065] Figure 12 Schematic diagram of the second structure of the pipe clamp plug. DETAILED DESCRIPTION

[0066] The tunnel drainage system construction method of the present invention is further described in detail below with reference to the accompanying drawings.

[0067] like Figure 1 、 Figure 2 As shown, the tunnel drainage system of the tunnel drainage system construction method of the present invention includes a longitudinal drainage pipeline 1, a transverse drainage pipeline 2, a circular drainage pipeline 3, a PVC water pipe 4, and a PVC embedded pipe 5. The circular drainage pipeline 3 includes a whole HDPE drainage pipeline 301.

[0068] like Figure 3 、 Figure 4As shown, the longitudinal drainage pipeline 1 includes a HDPE double-wall corrugated pipe 101, which is arranged on a drainage pipe positioning frame 6. A tee joint 7 is installed at the end of the HDPE double-wall perforated corrugated pipe 101. The tee joint 7 includes a front interface 701, a rear interface 702, and a water outlet 703. The front interface 701 of the tee joint 7 is connected to the HDPE double-wall perforated corrugated pipe 101, and a pipe clamp plug 8 is installed at the rear interface 702 of the tee joint 7. The water outlet 703 of the tee joint 7 is installed with a PVC shaped pipe 9. The PVC shaped pipe 9 is assembled on the drainage pipe. On the positioning frame 6, the port of the PVC shaped pipe 9 is installed with a pipe clamp plug 8, the outer side of the HDPE double-wall perforated corrugated pipe 101 is arranged at intervals with annular short-circuited shaped drainage blind pipes 10, and corrugated pipe clamps 11 are arranged at intervals on the annular short-circuited shaped drainage blind pipes 10. A reducing joint 12 is installed at the water outlet port of the annular short-circuited shaped drainage blind pipe 10, and the port of the reducing joint 12 is installed with a PVC shaped pipe 9. The PVC shaped pipe 9 is assembled on the drainage pipe positioning frame 6, and the port of the PVC shaped pipe 9 is installed with a pipe clamp plug 8.

[0069] like Figure 5 As shown, the port of the HDPE double-wall perforated corrugated pipe 101 is installed with an elbow 77, and the elbow 77 includes an inlet 7701 and an outlet 7702. The inlet 7701 is connected to the HDPE double-wall perforated corrugated pipe 101, and the outlet 7702 is installed with a PVC molding pipe 9. The PVC molding pipe 9 is assembled on the drainage pipe positioning frame 6, and the port of the PVC molding pipe 9 is installed with a pipe clamp plug 8.

[0070] like Figure 6 As shown, the horizontal drainage pipeline 2 includes a PVC drainage pipe 201, which is set on the drainage pipe positioning frame 6. The two ends of the PVC drainage pipe 201 are respectively installed with straight-through connecting sleeves 202, and the ends of the straight-through connecting sleeves 202 are installed with pipe clamp plugs 8.

[0071] like Figure 7 As shown, the drain pipe positioning frame 6 includes a pipe clamp 13, which is connected to the fixed base 15 through a connecting rod 14. The pipe clamp 13 is an arc-shaped plate with an open upper end. The bottom end of the pipe clamp 13 is provided with an upper insert 16 matching the connecting rod 14 and a through hole 17 connected to the upper insert 16. The outer wall of the pipe clamp 13 is provided with reinforcing ribs 18. The fixed base 15 is a flat plate with four blades 19. The top of the fixed base 15 is provided with a lower insert 20 matching the connecting rod 14. The upper insert 16 and the lower insert 20 are provided with fastening screws 21 matching the connecting rod 14. The lower insert 20 is vertically arranged, and the lower insert 21 is perpendicular to the flat plate.

[0072] like Figure 8As shown, the drain pipe positioning frame 6 includes a pipe clamp 13, which is connected to the fixed base 15 through a connecting rod 14. The pipe clamp 13 is an arc-shaped plate with an open upper end. The bottom end of the pipe clamp 13 is provided with an upper insert 16 that matches the connecting rod 14 and a through hole 17 connected to the upper insert 16. The outer wall of the pipe clamp 13 is provided with reinforcing ribs 18. The fixed base 15 is a flat plate with four blades 19. The top of the fixed base 15 is provided with a lower insert 20 that matches the connecting rod 17. The upper insert 16 and the lower insert 20 are provided with fastening screws 21 that match the connecting rod 14. The lower insert 20 is arranged at an angle, and the lower insert 20 forms an acute angle with the flat plate.

[0073] like Figure 9 As shown, the corrugated pipe clamp 11 includes an arched clamp body 1101 , with integrally bent connecting plates 1102 symmetrically provided at both ends of the clamp body 1101 . The outer wall of the clamp body 1101 is smooth, and the inner wall of the clamp body 1101 is provided with a corrugated rib 1103 .

[0074] like Figure 10 As shown, integrally bent connecting plates 1102 are symmetrically provided at both ends of the pipe clamp body 1101 . The outer wall of the pipe clamp body 1101 is smooth, and two corrugated ribs 1103 are provided on the inner wall of the pipe clamp body 1101 .

[0075] like Figure 11 As shown, the pipe clamp plug 8 includes a basin cavity 22, an annular baffle 23 is provided at the upper end of the basin cavity 22, two corrugated ribs 24 are provided at the lower end of the basin cavity 22, each corrugated rib 24 is composed of three sections of intermittently arranged ribs 25, the annular baffle 23 is horizontally arranged, the annular baffle 23 is parallel to the bottom surface of the basin cavity 22, and a pull head 26 is provided on the inner bottom surface of the basin cavity 23.

[0076] like Figure 12 As shown, the pipe clamp plug 8 includes a basin cavity 22, an annular baffle 23 is provided at the upper end of the basin cavity 22, and two corrugated ribs 24 are provided at the lower end of the basin cavity 22. Each corrugated rib 24 is composed of three sections of intermittently arranged ribs 25. The annular baffle 23 is arranged at an angle, and the annular baffle 23 forms an acute angle with the bottom surface of the basin cavity 22.

[0077] The technical solution adopted by the tunnel drainage system construction method of the present invention includes the following steps:

[0078] The first step is to locate the longitudinal drainage pipeline

[0079] After the initial support and re-spraying of the inverted arch is completed, the geotextile is laid and the construction of the longitudinal drainage pipeline of the low side wall is carried out;

[0080] First, multiple drain pipe positioning frames 6 consisting of pipe clamps 13, connecting rods 14, and fixed bases 15 are positioned on the sprayed concrete base surface using a gas nail gun. According to the depth variation of the concave and convex positions of the sprayed concrete base surface, the multiple drain pipe positioning frames 6 are respectively selected to use matching connecting rods 14, so that the center height of the pipe clamps 13 of the multiple drain pipe positioning frames 6 meets the design requirements, and the upper and lower ends of the connecting rods 14 are fixed with fastening screws 21;

[0081] The first point is to install the HDPE double-wall perforated corrugated pipe 101 into the pipe clamp 13 of the plurality of drainage pipe positioning frames 6, and adjust the positions of the two ends of the HDPE double-wall perforated corrugated pipe 101 so that the HDPE double-wall perforated corrugated pipe 101 meets the design requirements;

[0082] The first point is the third step. A tee joint 7 or an elbow 77 is installed at the port of the HDPE double-wall perforated corrugated pipe 101. The tee joint 7 or the elbow 77 can be of a variable diameter or a constant diameter as needed. The elbow 77 is used for the port after the HDPE double-wall perforated corrugated pipe 101 is positioned. The tee joint 7 is used to extend the connection port of the HDPE double-wall perforated corrugated pipe 101. The tee joint 7 includes a front interface 701, a rear interface 702, and a water outlet 703. The front interface 701 of the tee joint 7 is connected to the HDPE double-wall perforated corrugated pipe 101. The rear interface 702 of the tee joint 7 is installed with a pipe clamp plug 8. The elbow 77 includes an inlet 7701 and an outlet 7702. The inlet 7701 is connected to the HDPE double-wall perforated corrugated pipe 101. The angles of the water outlet 703 of the tee joint 7 and / or the outlet 7702 of the elbow 77 are adjusted to meet the design requirements.

[0083] Step 1.4: Annular short-circuit shaped drainage blind pipes 10 are installed at intervals on the outside or inside of the HDPE double-wall perforated corrugated pipe 101. Corrugated pipe clamps 11 are installed at intervals on the annular short-circuit shaped drainage blind pipes 10. The corrugated pipe clamps 11 are fixed to the initial sprayed concrete base surface using a gas nail gun.

[0084] In the first and a half steps, a reducer 12 is installed at the outlet port of the annular short-circuited shaped drainage blind pipe 10, and a pipe clamp plug 8 is installed at the water inlet port of the annular short-circuited shaped drainage blind pipe 10;

[0085] Step 1.6: Install the PVC shaped pipe 9 into the water outlet 703 of the tee joint 7 and / or the outlet 7702 of the elbow 77 and the port of the reducer 12, matching the water outlet 703 of the tee joint 7 and / or the outlet 7702 of the elbow 77 and the port position of the reducer 12, fix multiple drain pipe positioning frames 6 with a gas nail gun, assemble the PVC shaped pipe 9 into the pipe clamp 13 of the drain pipe positioning frame 6, adjust the port bevel position of the PVC shaped pipe 9 to be consistent with the tangent position of the inverted arch, and fix the upper and lower ends of the connecting rod 14 with fastening screws 21;

[0086] Step 1.7: Install the pipe clamp plug 8 at the end of the PVC shaped pipe 9;

[0087] Step 1 and 8: After laying the waterproof board and back-attaching the water stop, position the steel bars and tie the skeleton steel mesh at the inverted arch and the low side wall, install the formwork and pour the low side wall and inverted arch concrete;

[0088] Step 2: Positioning of horizontal drainage pipelines

[0089] After the invert is poured, the horizontal drainage pipeline is positioned;

[0090] The second step is to use a gas nail gun to fix multiple drain pipe positioning frames 6. The multiple drain pipe positioning frames 6 are respectively selected to use matching connecting rods 14, so that the center height of the pipe clamps 13 of the multiple drain pipe positioning frames 6 meets the design requirements, and the upper and lower ends of the connecting rods 14 are fixed with fastening screws 21;

[0091] The second step is to install the PVC drainage pipe 201 into the pipe clamps 13 of the plurality of drainage pipe positioning frames 6;

[0092] In the second point, step 3, straight-through connecting sleeves 202 are installed at the two ends of the PVC drainage pipe 201;

[0093] In the second point four step, a pipe clamp plug 8 is installed at the end of the straight connection sleeve 202;

[0094] Step 2.5: Install the formwork and pour the inverted arch filling layer concrete;

[0095] Step 3: Locating the Circumferential Drainage Pipeline

[0096] After the invert arch filling and pouring is completed, reinforced concrete is used for the secondary lining of the tunnel. After the deformation of the surrounding rock is stable, geotextile is laid and the tunnel circumferential drainage system is constructed.

[0097] The third step is to remove the pipe clamp plug 8 of the water inlet port of the annular short-circuited fixed drainage blind pipe 10, and align the port of the entire HDPE drainage blind pipe 301 with the water inlet port of the annular short-circuited fixed drainage blind pipe 10;

[0098] In the second step of the third point, a corrugated pipe clamp 11 is installed at the position where the end of the entire HDPE drainage blind pipe 301 is aligned with the water inlet port of the annular short-circuited fixed drainage blind pipe 10, and the corrugated pipe clamp 11 is fixed to the sprayed concrete base surface with a gas nail gun;

[0099] In the third point, the entire HDPE drainage blind pipe 301 is circumferentially arranged along the sprayed concrete, and corrugated pipe clamps 11 are spaced apart on the entire HDPE drainage blind pipe 301. The corrugated pipe clamps 11 are fixed to the concrete base surface with a gas nail gun.

[0100] Then, the waterproof sheet is laid and welded, the steel frame is tied, and the backing and embedded water stop are installed. After the lining trolley is in place, the secondary lining concrete is poured.

[0101] Step 4: Construction of PVC extension molding pipe and S-shaped PVC molding pipe

[0102] The construction of PVC extended molding pipe and S-shaped PVC molding pipe shall be carried out after the secondary lining and invert arch filling are completed;

[0103] In the fourth step, the pipe clamp plug 8 of the port of the PVC shaped pipe 9 and the pipe clamp plug 8 of the straight connecting sleeve 202 are removed respectively;

[0104] In the fourth point, in the second step, multiple drainage pipe positioning frames 6 are positioned on the lining concrete base surface with a gas nail gun at the place where the PVC shaped pipe 9 is matched. The matching connecting rods 14 can be selected according to the height change of the base surface so that the center height of the pipe clamps 13 of the multiple drainage pipe positioning frames 6 meets the design requirements. The upper and lower ends of the connecting rods 14 are fixed with fastening screws 21;

[0105] In the fourth point three steps, the PVC extension molding pipe is inserted into the port of the PVC molding pipe 9 and fixed in the pipe clamp 13 of the drainage pipe positioning frame 6;

[0106] Step 4.4: Install the pipe clamp plug 8 on the outlet port of the PVC extended shaped pipe;

[0107] Step 4.5: Use a gas nail gun to position the multiple drainage pipe positioning brackets 6 on the lining concrete base surface at the ports matching the straight-through connecting sleeve 202, adjust the support angle to meet the design requirements, and fix the upper and lower ends of the connecting rod 14 with the fastening screws 21;

[0108] In step 4.6, the S-shaped PVC pipe fitting is installed into the straight-through connecting sleeve 202 and fixed in the pipe clamp 13 of the drainage pipe positioning frame 6;

[0109] Step 4.7: Install the pipe clamp plug 8 at the port of the S-shaped PVC molding pipe;

[0110] After installation, concrete is poured using a formwork trolley;

[0111] Step 5: Construction of water channel in leveling layer

[0112] Fifth point, during the construction of the horizontal drainage pipeline, the horizontal water conduit pipeline is constructed simultaneously. A gas nail gun is used to fix multiple drainage pipe positioning frames 6. The multiple drainage pipe positioning frames 6 are respectively selected to use matching connecting rods 14. The center height of the pipe clamps 13 of the multiple drainage pipe positioning frames 6 meets the design requirements. The upper and lower ends of the connecting rods 14 are fixed with fastening screws 21.

[0113] In the second step of the fifth point, the PVC water pipe 4 is installed into the pipe clamps 13 of the plurality of drainage pipe positioning frames 6;

[0114] In the third step of the fifth point, a plurality of drain pipe positioning frames 6 are longitudinally fixed on the surface of the inverted arch filling layer at the position matching the water inlet port of the PVC water conduit 4 using a gas nail gun. The plurality of drain pipe positioning frames 6 are respectively selected to use matching connecting rods 14 so that the center height of the pipe clamps 13 of the plurality of drain pipe positioning frames 6 meets the design requirements, and the upper and lower ends of the connecting rods 14 are fixed with fastening screws 21;

[0115] In the fourth step of the fifth point, the PVC embedded pipe 5 is fixed in the pipe clamp 13. The PVC embedded pipe 5 blocks the water inlet port of the PVC water pipe 4. Concrete is poured. After the concrete is initially set, the PVC embedded pipe 5 is removed. The cement scum at the water inlet port of the PVC water pipe 4 is cleaned. The position after the PVC embedded pipe 5 is removed constitutes a water guide trough.

[0116] The tunnel drainage system construction method provided by the present invention adopts components such as a drainage pipe positioning frame 6, a corrugated pipe clamp 11, and a pipe clamp plug 8. Each component adopts a mutually complementary manner to position and connect the longitudinal drainage pipeline, the transverse drainage pipeline, and the annular drainage pipeline. A flat drainage pipe positioning frame 6, an inclined drainage pipe positioning frame 6, a fixed corrugated pipe clamp 11, a connecting corrugated pipe clamp 11, a flat pipe clamp plug 8, and an inclined pipe clamp plug 8 are used as needed. It is easy to install, each pipeline is neat and firm, the pipeline ports are tightly sealed, and concrete cannot invade. The HDPE double-wall perforated corrugated pipe 101 is set up individually or in multiples. When the HDPE double-wall perforated corrugated pipe 101 is set up individually, elbows 77 are respectively installed at the two ends of the HDPE double-wall perforated corrugated pipe 101, and the tunnel drainage system is constructed in a modular manner. When multiple HDPE double-wall perforated corrugated pipes 101 are installed, adjacent HDPE double-wall perforated corrugated pipes 101 are connected via tees 7, allowing for integrated tunnel drainage system construction. Tees 7 or elbows 77 can be variable or constant diameter, depending on the needs. A water channel is installed in the leveling layer to direct surface water from tunnel and track cleaning back to the central ditch.

[0117] When using the drain pipe positioning frame 6, cut the connecting rod 14 to the appropriate size as needed, select the appropriate pipe clamp 13 as needed, assemble the pipe clamp 13, connecting rod 14 and fixed base 15 from top to bottom, hold the drain pipe with the pipe clamp 13, fix the fixed base 15 with a gas nail gun, and then use the fastening screws 21 to fix the upper and lower ends of the connecting rod 14 to the upper insert 16 and lower insert 20. The lower insert 20 is set vertically and perpendicular to the plate, which is suitable for places with a flat ground. The lower insert 20 is set at an angle and forms an acute angle with the plate, which is suitable for places with a sloped ground. The outer wall of the pipe clamp 13 of the drain pipe positioning frame 6 is provided with reinforcing ribs 18 to increase the strength of the pipe clamp 13. The bottom end of the pipe clamp 13 is provided with a through hole 17 connected to the upper insert 16 to facilitate the installation of the connecting rod 14.

[0118] The bellows clamp 11 has a corrugated rib 1103 on the inner wall of the clamp body 1101, which serves as a fixed clamp. The bellows clamp 11 has two corrugated ribs 1103 on the inner wall of the clamp body 1101, which serves as a connecting clamp. During use, the connecting ends of two bellows are connected using the bellows clamp 11 with two corrugated ribs 1103 on the inner wall of the clamp body 1101. The two corrugated ribs 1103 respectively snap into the corrugated grooves of the two bellows, preventing the connection between the two bellows from separating or disconnecting. A single bellows is fixed at a certain distance using a bellows clamp with a corrugated rib 1103 on the inner wall of the clamp body 1101. The corrugated rib snaps into the corrugated grooves of the single bellows, preventing the single bellows from deviating.

[0119] When the pipe clamp plug 8 is in use, the lower end of the pelvic cavity 22 is screwed into the corrugated pipe, and the corrugated ribs 24 at the lower end of the pelvic cavity 22 match the corrugated grooves of the corrugated pipe. The corrugated ribs 24 are screwed into the corrugated grooves, so that the pelvic cavity 22 is tightly connected to the corrugated pipe. After the pelvic cavity 22 is screwed until the annular baffle 23 contacts the pipe opening of the corrugated pipe, the pelvic cavity 22 stops screwing in, and the annular baffle 23 tightly seals the pipe opening of the corrugated pipe. The corrugated ribs 24 ensure strong stability in the connection between the pipe clamp plug 8 and the corrugated pipe, and the annular baffle 23 tightly seals the pipe opening of the corrugated pipe. In addition, the pipe clamp plug 8 can be disassembled and reused. The corrugated ribs 24 are composed of two or more sections of ribs 25 arranged intermittently, which can accommodate corrugated pipes of more specifications. A pull head 26 is provided on the inner bottom surface of the pelvic cavity 22. Holding the pull head 26 makes the installation and disassembly of the pipe clamp plug 8 more convenient.

[0120] The tunnel drainage system construction method provided by the present invention is not limited to the above-mentioned embodiments. Any modifications, equivalent replacements and improvements made on the basis of the present invention should be included in the protection scope of the present invention.

Claims

1. Tunnel drainage system construction method, characterized by , including the following steps: The first step is to locate the longitudinal drainage pipeline After the initial support and re-spraying of the inverted arch is completed, the geotextile is laid and the construction of the longitudinal drainage pipeline of the low side wall is carried out; The first step is to position multiple drainage pipe positioning frames consisting of pipe clamps, connecting rods and fixed bases on the sprayed concrete base surface with a gas nail gun. According to the depth changes of the concave and convex positions of the sprayed concrete base surface, the multiple drainage pipe positioning frames are respectively selected to use matching connecting rods, so that the center height of the pipe clamps of the multiple drainage pipe positioning frames meets the design requirements, and the upper and lower ends of the connecting rods are fixed with fastening screws; The first point, step two, is to install the HDPE double-wall perforated corrugated pipe into the pipe clamps of multiple drainage pipe positioning frames, and adjust the positions of the two ends of the HDPE double-wall perforated corrugated pipe to make the HDPE double-wall perforated corrugated pipe meet the design requirements; The first point is the third step. Install a tee or an elbow at the port of the HDPE double-wall perforated corrugated pipe. The tee or elbow can be of variable diameter or constant diameter as needed. The elbow is used for the port after the HDPE double-wall perforated corrugated pipe is positioned. The tee is used to connect the port when the HDPE double-wall perforated corrugated pipe is extended. The tee includes a front interface, a rear interface, and a water outlet. The front interface of the tee is connected to the HDPE double-wall perforated corrugated pipe. A pipe clamp is installed at the rear interface of the tee. The elbow includes an inlet and an outlet. The inlet is connected to the HDPE double-wall perforated corrugated pipe. Adjust the angle of the water outlet of the tee or / and the outlet of the elbow to meet the design requirements. Step 1.4: Install circumferential short-circuit drainage blind pipes on the outside or inside of the HDPE double-wall perforated corrugated pipe at intervals. Install corrugated pipe clamps on the circumferential short-circuit drainage blind pipes at intervals. Use a gas nail gun to fix the corrugated pipe clamps to the initial sprayed concrete base surface. Step 1.5: Install a reducer at the outlet of the annular short-circuit shaped drainage blind pipe, and install a pipe clamp plug at the inlet of the annular short-circuit shaped drainage blind pipe; Step 1.6: Install the PVC shaped pipe into the water outlet of the tee joint and / or the outlet of the elbow and the port of the reducer, matching the position of the water outlet of the tee joint and / or the outlet of the elbow and the port of the reducer, use a gas nail gun to fix multiple drain pipe positioning frames, assemble the PVC shaped pipe into the pipe clamp of the drain pipe positioning frame, adjust the port bevel position of the PVC shaped pipe to be consistent with the tangent position of the inverted arch, and fix the upper and lower ends of the connecting rod with fastening screws; Step 1.7: Install pipe clamps on the ends of the PVC shaped pipes; Step 1 and 8: After laying the waterproof board and back-attaching the waterstop, position the steel bars and tie the skeleton steel mesh of the inverted arch and the low side wall, install the formwork and pour the concrete of the low side wall and the inverted arch; Step 2: Positioning of horizontal drainage pipelines After the invert is poured, the horizontal drainage pipeline is positioned; The second step is to use a gas nail gun to fix multiple drain pipe positioning brackets. Use matching connecting rods for each of the multiple drain pipe positioning brackets so that the center height of the pipe clamps of the multiple drain pipe positioning brackets meets the design requirements. Use fastening screws to fix the upper and lower ends of the connecting rods. Step 2: Install the PVC drain pipe into the pipe clamps of the multiple drain pipe positioning racks; Step 2: Install straight-through connecting sleeves at both ends of the PVC drain pipe. Step 2.4: Install a pipe clamp plug at the port of the straight-through connecting sleeve; Step 2.5: Install the formwork and pour the inverted arch filling layer concrete; Step 3: Locating the Circumferential Drainage Pipeline After the invert arch filling and pouring is completed, reinforced concrete is used for the secondary lining of the tunnel. After the deformation of the surrounding rock is stable, geotextile is laid and the tunnel circumferential drainage system is constructed. The third step is to remove the pipe clamp plug of the water inlet port of the annular short-circuit fixed drainage blind pipe, and align the port of the entire HDPE drainage blind pipe with the water inlet port of the annular short-circuit fixed drainage blind pipe; Step 2 of the third point: Install a corrugated pipe clamp at the point where the end of the entire HDPE drainage blind pipe is aligned with the water inlet port of the annular short-circuit fixed drainage blind pipe, and fix the corrugated pipe clamp to the sprayed concrete base surface with a gas nail gun; Step 3 of the third point: The entire HDPE drainage blind pipe is installed along the circumference of the sprayed concrete. Corrugated pipe clamps are installed at intervals on the entire HDPE drainage blind pipe. The corrugated pipe clamps are fixed to the concrete base surface with a gas nail gun. Then, the waterproof sheet is laid and welded, the steel frame is tied, and the backing and embedded water stop are installed. After the lining trolley is in place, the secondary lining concrete is poured. Step 4: Construction of PVC extension molding pipe and S-shaped PVC molding pipe The construction of PVC extended molding pipe and S-shaped PVC molding pipe shall be carried out after the secondary lining and invert arch filling are completed; The fourth step is to remove the pipe clamp plugs of the PVC shaped pipe and the pipe clamp plugs of the straight connecting sleeve respectively; Step 2 of the fourth point is to use a gas nail gun to position multiple drainage pipe positioning frames on the lining concrete base surface at the place where they match the PVC shaped pipes. You can choose to use matching connecting rods according to the height changes of the base surface, so that the center height of the pipe clamps of the multiple drainage pipe positioning frames meets the design requirements, and fix the upper and lower ends of the connecting rods with fastening screws; In the third step of the fourth point, insert the PVC extension molding pipe into the port of the PVC molding pipe and fix it in the pipe clamp of the drainage pipe positioning frame; Step 4.4: Install a pipe clamp plug on the outlet port of the PVC extended shaped pipe; Step 4.5: Use a gas nail gun to position multiple drainage pipe positioning brackets on the lining concrete base surface at the ports that match the straight-through connection sleeves, adjust the support angle to meet the design requirements, and fix the upper and lower ends of the connecting rods with fastening screws; Step 4.6: Install the S-shaped PVC fitting into the straight-through connecting sleeve and secure it to the pipe clamp of the drainage pipe positioning frame; Step 4.7: Install the pipe clamp plug at the end of the S-shaped PVC molding pipe; After installation is completed, concrete is poured using a formwork trolley.

2. The tunnel drainage system construction method according to claim 1, characterized in that The steps include: Step 5: Construction of water channel in leveling layer The fifth point is to simultaneously construct the horizontal water pipes during the construction of the horizontal drainage pipelines. Use a gas nail gun to fix multiple drainage pipe positioning frames. Use matching connecting rods for each of the multiple drainage pipe positioning frames. Make sure the center height of the pipe clamps of the multiple drainage pipe positioning frames meets the design requirements. Use fastening screws to fix the upper and lower ends of the connecting rods. Step 2 of the fifth point is to install the PVC water pipe into the pipe clamps of multiple drainage pipe positioning racks; Step 3 of the fifth point is to use a gas nail gun to longitudinally fix multiple drainage pipe positioning frames on the surface of the inverted arch filling layer at the position matching the water inlet port of the PVC water pipe. The multiple drainage pipe positioning frames are respectively selected to use matching connecting rods, so that the center height of the pipe clamps of the multiple drainage pipe positioning frames meets the design requirements, and the upper and lower ends of the connecting rods are fixed with fastening screws; The fourth step of the fifth point is to fix the PVC embedded pipe in the pipe clamp. The PVC embedded pipe will block the water inlet port of the PVC water pipe. Pour concrete. After the concrete has initially set, remove the PVC embedded pipe. Clean the cement scum at the water inlet port of the PVC water pipe. The position after the PVC embedded pipe is removed constitutes a water guide trough.

3. The tunnel drainage system construction method according to claim 1, characterized in that: The drainage pipe positioning frame includes a pipe clamp, which is connected to the fixed base through a connecting rod. The pipe clamp is an arc-shaped plate with an open upper end. The bottom end of the pipe clamp is provided with an upper plug that matches the connecting rod. The fixed base is a flat plate with more than three blades. The top of the fixed base is provided with a lower plug that matches the connecting rod. The upper and lower plugs are provided with fastening screws that match the connecting rod. The lower plug is vertically arranged, and the lower plug is perpendicular to the flat plate, or the lower plug is inclined, and the lower plug forms an acute angle with the flat plate.

4. The tunnel drainage system construction method according to claim 3, characterized in that: The outer wall of the pipe clamp is provided with reinforcing ribs, and the bottom end of the pipe clamp is provided with a through hole connected with the upper inserting pipe.

5. The tunnel drainage system construction method according to claim 1, characterized in that: The corrugated pipe clamp comprises an arched pipe clamp body, with integrally bent connecting plates symmetrically arranged at both ends of the pipe clamp body. The outer wall of the pipe clamp body is smooth, and the inner wall of the pipe clamp body is provided with one or two corrugated ribs.

6. The tunnel drainage system construction method according to claim 1, characterized in that: The pipe clamp plug includes a pelvic cavity, an annular baffle is provided at the upper end of the pelvic cavity, and at least one corrugated rib is provided at the lower end of the pelvic cavity. The corrugated rib is composed of two or more ribs arranged intermittently. The annular baffle is arranged horizontally and parallel to the bottom surface of the pelvic cavity, or the annular baffle is arranged obliquely and forms an acute angle with the bottom surface of the pelvic cavity.

7. The tunnel drainage system construction method according to claim 6, characterized in that: A slider is provided on the inner bottom surface of the pelvic cavity.

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