A large box culvert water-stop plugging device and a repair method using the device

Abstract

A large box culvert water-stop plugging device, including a wall-shaped plugging device body capable of plugging a large box culvert, is characterized in that: the plugging device body is formed by horizontally splicing a plurality of cylindrical plugging units (1), the plugging units are connected to each other with a splicing surface (1-1), and the plugging surfaces are combined to form a plugging wall of the plugging device body. A water passing port (1-3) penetrating through the plugging unit is formed in the middle of the plugging surface. A flange (1-4) is arranged on one side of the water passing port, and the flange can be connected to a flange cover plate (2) and a water passing hose (3). According to a large box culvert water-stop plugging device of the present invention and a repair method using the device, the split-module type plugging is adopted, which can be adapted to large-diameter pipelines of various pipe types, can repair large-diameter pipe culverts without stopping water, does not require an additional temporary drain pipe, reduces the inconvenience caused by the repair project to residents' lives, reduces the repair working hours and costs, has a simple structure and is convenient to operate.

Description

Technical Field

[0001] The present invention relates to the field of pipeline repair, and more specifically, to a water-stop plugging device for large culverts without interrupting water supply and a repair method using the device. Background Art

[0002] Large single-hole culverts buried under urban roads in the 1980s and 1990s for rain and sewage discharge have suffered from problems such as top spalling, sanding, exposed steel bars, and even corrosion perforation due to corrosion and other reasons, and urgent repair is needed. Because the culvert size is large, the diameter of the circular pipeline is more than 3 meters, and the burial depth is relatively deep, generally below 4 meters. The excavation method requires large-scale excavation of the road surface, which is time-consuming and laborious and affects traffic. Especially with the development of the city, many structures have been built above these culverts, making this construction method increasingly difficult and bringing great pressure to urban traffic, safety, environment, etc. Moreover, most of these large sewage mains are single-row culverts. During construction, there is no alternative drainage facility, and water cannot be cut off for a long time. The cost of temporary drainage facilities is high and they are not operable. With the improvement of technology, in recent years, integral repair technologies such as CIPP lining method have also been used to repair circular pipelines with a diameter of Φ1800 and below or small culverts with a comparable diameter. This method has fast construction speed and obvious repair effect, but large culverts are restricted by the construction difficulty brought by the large diameter and the need for a large construction site. And it cannot solve the problem of long-term water cut-off required for future pipeline maintenance and repair. Summary of the Invention

[0003] To solve the above problems, the present invention provides a water-stop plugging device for large culverts without interrupting water supply and a repair method using the device, which can perform repair construction on large culverts without interrupting water supply and without building temporary drainage facilities. The technical solutions are as follows.

[0004] A water-stop plugging device for large culverts without interrupting water supply includes a wall-shaped plugging device body that can plug large culverts. It is characterized in that: the plugging device body is horizontally spliced by a plurality of cylindrical plugging units 1, the plugging units are connected to each other by splicing surfaces 1-1, and the plugging surfaces are combined to form the plugging wall of the plugging device body. A water passing port 1-3 penetrating the plugging unit is formed in the middle of the plugging surface, and a flange 1-4 is arranged on one side of the water passing port. The flange can be connected to a flange cover plate 2 and a water passing hose 3.

[0005] Thus, the plugging units can be separately transported into the well for assembly, the two ends of the pipeline to be repaired are plugged, and temporary water passing is carried out by connecting the water passing ports at both ends through the water passing hose. The remaining water passing ports are closed with flange cover plates to form a dry construction space.

[0006] According to the water-stop plugging device for large culverts without interrupting water supply of the present invention, it is characterized in that: the plugging unit 1 is hollow inside, an injection hole 1-5 is arranged on the upper part of the outer wall, and a drainage hole 1-6 is arranged on the lower part of the outer wall.

[0007] Thus, the hollow plug unit can be conveniently transported and installed. After installation, water can be injected through the water injection hole to increase the weight, which is beneficial for plugging. After draining water through the drain hole, the weight is reduced, making it easy to disassemble.

[0008] A continuous water-blocking device for large culverts according to the present invention is characterized in that: a watertight material is provided on the assembling surface of the plug unit 1.

[0009] Thus, watertightness can be ensured.

[0010] A continuous water-blocking device for large culverts according to the present invention is characterized in that: the plugging surface of the plug unit 1 is rectangular.

[0011] Thus, it can be installed in the middle of the plugging device body and is convenient for assembly.

[0012] A continuous water-blocking device for large culverts according to the present invention is characterized in that: one side of the plugging surface of the plug unit 1 is arc-shaped.

[0013] Thus, it can be installed at the edge of the plugging device body to adapt to circular culverts.

[0014] A continuous water-blocking device for large culverts according to the present invention is characterized in that: one corner of the plugging surface of the plug unit 1 is arc-shaped.

[0015] Thus, it can be installed at the corner of the plugging device body to adapt to rectangular culverts.

[0016] A continuous water-blocking device for large culverts according to the present invention is characterized in that: fixing screw holes 1-7 are formed at the edge of the plugging surface of the plug unit 1, fixing screws are arranged in the fixing screw holes, and connecting rods are arranged between adjacent screw holes of every two adjacent plug units.

[0017] Thus, it can be fixed with screws and connecting rods.

[0018] A continuous water-blocking device for large culverts according to the present invention is characterized in that: welding heads are formed at the edge of the plugging surface of the plug unit 1, and fixing channel steels are welded between adjacent welding heads of every two adjacent plug units.

[0019] Thus, welding fixation can be carried out.

[0020] A repair method using a continuous water-blocking device for large culverts, applicable to a continuous water-blocking device for large culverts according to the present invention, includes the following steps:

[0021] Step 1: assembling. After the water supply to the pipeline to be repaired is cut off and the well is drained, a suitable plugging unit 1 is selected according to the size of the culvert and transported into the well through the inspection well, and assembled upstream and downstream of the two inspection wells of the pipeline to be repaired;

[0022] Step 2: reinforcement: the assembled plugging unit is welded and reinforced with connecting rods, fixing screw holes and fixing screws or with channel steel and welding joints, and water is injected into the plugging unit to increase its weight;

[0023] Step 3: Install the water pipe, select the number of water ports 1-3 to be connected according to the water flow of the pipe, connect the water ports at the bottom of the two-end plugging device with the water hose 3, and close the remaining water ports with the flange cover 2;

[0024] Step 4: Test run: let water through the pipeline to be repaired, check the structural strength and water tightness of the plugging device, plug the leaking parts, and start the construction after ensuring safety.

[0025] Step 5: Repair the top of the pipeline. Set up a support frame 4 in the pipeline to be repaired, repair the top of the pipeline, knock and peel off the corroded pipes of the original culvert, repair the defects with materials that are not less than the strength of the raw materials, repair the corroded perforations, and reinforce the perforations by grouting;

[0026] Step 6: Repair the bottom of the pipeline. Set up a pipeline support frame 4 in the pipeline to be repaired. After a short water stop, connect the upper water outlet with a water hose 3. The other water outlets are closed with a flange cover plate 2. The water hose 3 is set on the support frame to pass water to repair the bottom of the pipeline.

[0027] Step seven, dismantle and repair, stop the water supply, dismantle the construction facilities in the pipeline, drain and remove the welding of the plugging unit, empty the pipeline and then resume water flow.

[0028] According to the repair method of the large box culvert non-stop water blocking device described in the present invention, it is characterized in that: in the steps five and six, the repair method is spraying or formwork grouting repair, and the surface is sprayed with polyurethane anti-corrosion.

[0029] According to the large box culvert water-stopping sealing device and the repair method using the same of the present invention, a split module test sealing is adopted, which can be adapted to large-diameter pipes of various pipe types, and can carry out non-stop water repair on large-diameter pipe culverts without setting up temporary drainage pipes, thereby reducing the inconvenience caused by the repair project to residents' lives, reducing the repair time and cost, and having a simple structure and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a structural diagram of a large box culvert non-stop water sealing device.

[0031] Figure 2Schematic structural diagram of a water-blocking device for a large culvert without water interruption adapted to a square culvert

[0032] Figure 3 Front view of the plug unit

[0033] Figure 4 Top view of the plug unit

[0034] Figure 5 Schematic structural diagram of a plug unit with another shape

[0035] Figure 6 Assembly diagram of two adjacent plug units

[0036] Figure 7 Schematic diagram of a repair method using a water-blocking device for a large culvert without water interruption

[0037] Figure 8 Schematic diagram of a repair method using a water-blocking device for a large culvert without water interruption

[0038] Where 1 is the plug unit, 1-1 is the assembly surface, 1-4 is the flange, 1-3 is the water passage opening, 1-5 is the water injection hole, 1-6 is the drainage hole, 1-7 is the fixing screw hole, 2 is the flange cover plate, 3 is the water passage hose, 4 is the bearing frame, and 5 is the inspection well. Detailed implementation method

[0039] Example 1

[0040] A water-blocking device for a large culvert without water interruption, the main body of the blocking device is composed of a plurality of cylindrical plug units 1 spliced horizontally. The plug units are connected to each other with the assembly surface 1-1, and the blocking surfaces are combined to form the blocking wall of the main body of the blocking device. A water passage opening 1-3 penetrating the plug unit is formed in the middle of the blocking surface. A flange 1-4 is arranged on one side of the water passage opening, and the flange can be connected to the flange cover plate 2 and the water passage hose 3.

[0041] The plug unit 1 is hollow inside, and a water injection hole 1-5 is arranged on the upper part of the outer wall, and a drainage hole 1-6 is arranged on the lower part of the outer wall.

[0042] A watertight material is arranged on the assembly surface of the plug unit 1.

[0043] The blocking surface of the plug unit 1 arranged in the middle is square.

[0044] The outer edge of the blocking surface of the plug unit 1 arranged at the edge is arc-shaped.

[0045] Fixing screw holes 1-7 are formed at the edge of the blocking surface of the plug unit 1, and every two adjacent plug units are fixed with connecting rods and screws.

[0046] A repair method using a water-blocking device for a large culvert without water interruption is as follows

[0047] Step 1: Assembly. Cut off the water supply to the pipeline to be repaired. After the well is drained, select a suitable plugging unit 1 according to the culvert size and transport it into the well through the inspection well. Assemble it at the upstream and downstream of the two inspection wells of the pipeline to be repaired.

[0048] Step 2: Reinforcement. Reinforce the assembled plugging unit with connecting rods in cooperation with fixing screw holes and fixing screws, or weld and reinforce it with channel steel in cooperation with welding joints. Inject water into the inside of the plugging unit to increase the weight.

[0049] Step 3: Install the water pipe. Select the number of water inlets 1-3 to be connected according to the water flow of the pipeline. Connect the lower water inlets of the two end plugging devices with a water hose 3, and close the remaining water inlets with flange covers 2.

[0050] Step 4: Trial operation. Let water flow through the pipeline to be repaired, check the structural strength and water tightness of the plugging device, plug the leaking parts, and start formal water supply after ensuring safety to start the construction.

[0051] Step 5: Repair the top of the pipeline. Erect a bearing frame 4 inside the pipeline to be repaired, repair the top of the pipeline, knock and peel off the corroded pipe materials of the original culvert, repair the defective parts with materials not less than the strength of the original materials, repair the corroded and perforated parts, and grout and reinforce the surrounding of the perforation.

[0052] Step 6: Repair the bottom of the pipeline. Erect a pipeline bearing frame 4 inside the pipeline to be repaired. After briefly cutting off the water supply, connect the upper water inlets with a water hose 3, close the remaining water inlets with flange covers 2, let the water hose 3 flow water on the bearing frame, and repair the bottom of the pipeline.

[0053] Step 7: Dismantle. Cut off the water supply after the repair is completed, remove the construction facilities inside the pipeline, drain the water from the plugging unit, remove the welding, empty the pipeline and then resume the water supply.

[0054] The repair method adopts shotcrete or formwork grouting repair, and polyurethane anti-corrosion spraying is carried out on the surface.

[0055] According to a large culvert non-stop water plugging device and a repair method using the device of the present invention, the split module type plugging is adopted, which can adapt to large-diameter pipelines of various pipe types, can repair large-diameter culverts without stopping water, does not require an additional temporary drainage pipe, reduces the inconvenience caused by the repair project to the residents' lives, reduces the repair working hours and costs, has a simple structure and is convenient to operate.

Claims

1. A method for repairing a large culvert without stopping water, which is used for repairing a large culvert between the upstream and downstream of two inspection wells of an underground pipeline to be repaired without stopping water and without building temporary drainage facilities. The diameter of the underground pipeline is more than 3 meters and the buried depth is less than 4 meters. It is characterized in that, It includes the following steps: Step 1, assembly. Stop the water supply of the pipeline to be repaired. After draining the water in the well, select a suitable plug unit (1) according to the size of the pipe culvert and transport it into the well through the inspection well (5). Assemble it at the upstream and downstream of the two inspection wells of the pipeline to be repaired; Step 2, reinforcement. Reinforce the assembled plug unit with a connecting rod and a fixing screw hole (1-7) and fixing screws or with a channel steel and a welding joint for welding. The plug units are connected to each other with an assembly surface (1-1) and form a sealing wall of the sealing device with the sealing surfaces combined. Inject water into the inside of the plug unit to increase the weight; Step 3, install a water pipe. Select the number of water inlets (1-3) to be connected according to the water flow of the pipeline. Connect the water inlets (1-3) at the lower part of the two end sealing devices with a water hose (3). The water inlets (1-3) penetrate through the middle of the sealing surface of the plug unit; The remaining water inlets are closed with flange covers (2); Step 4, trial operation. Let water flow through the pipeline to be repaired, check the structural strength and water tightness of the sealing device, seal the leaking parts, and start construction after ensuring safety; Step 5, repair the top of the pipeline. Erect a bearing frame (4) in the pipeline to be repaired, repair the top of the pipeline, knock and peel off the corroded pipe materials of the original pipe culvert, repair the damaged parts with materials not less than the strength of the original materials, repair the corroded and perforated parts, and grout and reinforce the surrounding of the perforation; Step 6, repair the bottom of the pipeline. Erect a bearing frame (4) in the pipeline to be repaired. After a short-term water cut-off, connect the upper water inlets with a water hose (3), and close the remaining water inlets with flange covers (2). Let water flow through the water hose (3) erected on the bearing frame to repair the bottom of the pipeline; Step 7, demolition. After the repair is completed, stop the water supply, remove the construction facilities in the pipeline, drain the water from the plug unit, remove the welding, empty the pipeline and then resume the water supply.

2. The method for repairing a large culvert without stopping water according to claim 1, characterized in that: In the above Step 5 and Step 6, the repair method adopts shotcreting or formwork grouting repair, and polyurethane anti-corrosion spraying is carried out on the surface.

3. A large culvert water-stopping and sealing device used for the large culvert water-stopping repair method described in Claim 1 or 2, including a wall-shaped sealing device body that can seal a large culvert. It is characterized in that: The sealing device body is composed of a plurality of cylindrical plug units (1) spliced horizontally. The plug units are connected to each other with an assembly surface (1-1), form a sealing wall of the sealing device body with the sealing surfaces combined, and a water inlet (1-3) penetrating through the plug unit is formed in the middle of the sealing surface. A flange (1-4) is arranged on one side of the water inlet, and the flange can be connected to a flange cover (2) and a water hose (3).

4. The large culvert water-stop plugging device according to claim 3, characterized in that: The inside of the plug unit (1) is hollow, a water injection hole (1-5) is arranged on the upper part of the outer wall, and a drain hole (1-6) is arranged on the lower part of the outer wall.

5. The large culvert water-stop plugging device according to claim 3, characterized in that: A watertight material is arranged on the assembly surface of the plug unit (1).

6. The large culvert water-stop plugging device according to claim 3, characterized in that: The sealing surface of the plug unit (1) is rectangular.

7. The large culvert water-stop plugging device according to claim 3, characterized in that: One side of the sealing surface of the plug unit (1) is arc-shaped.

8. The large culvert water-stop plugging device according to claim 3, characterized in that: One corner of the sealing surface of the plug unit (1) is arc-shaped.

9. The large culvert water-stop plugging device according to claim 3, characterized in that: Fixing screw holes (1-7) are formed on the edge of the sealing surface of the plug unit (1), fixing screws are arranged in the fixing screw holes, and connecting rods are arranged between the adjacent screw holes of every two adjacent plug units.

10. The large culvert water-stop plugging device according to claim 3, characterized in that: Welding heads are formed on the edge of the sealing surface of the plug unit (1), and fixing channel steels are welded between the adjacent welding heads of every two adjacent plug units.

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