CN112050021A - On-site repairing method of JPCCP (joint sealing gasket pipe) - Google Patents
On-site repairing method of JPCCP (joint sealing gasket pipe) Download PDFInfo
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- CN112050021A CN112050021A CN202011000039.5A CN202011000039A CN112050021A CN 112050021 A CN112050021 A CN 112050021A CN 202011000039 A CN202011000039 A CN 202011000039A CN 112050021 A CN112050021 A CN 112050021A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
- F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
- F16L55/164—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a sealing fluid being introduced in the pipe
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides a field repairing method of a JPCCP (joint sealing gasket) pipe, which comprises the following steps: removing all inner-layer core concrete of the damaged whole section of pipe body; cutting the protruding part of the damaged steel cylinder of the pipe body, and draining water; cutting off the deformed steel cylinder section, and checking the integrity and the tightness of the pipe body; finding out a water seepage channel and plugging; after plugging is finished, a steel lining cylinder is installed on the inner lining of the pipe body, and two ends of the steel lining cylinder are welded with the bell and spigot; after welding, firstly, filling waterproof materials between the steel lining cylinder and the outer layer pipe body through the grease injection hole in the steel lining cylinder until waterproof materials flow out of the grease injection hole, then sealing the exhaust hole in the steel lining cylinder by using a plug, removing grease injection equipment after pressure stabilization, and sealing the grease injection hole; and paving a reinforcing mesh on the inner wall of the steel lining cylinder, lining a fine stone concrete layer, and curing after initial setting. The method can be used for rapidly completing the repair, reducing the repair difficulty, greatly shortening the construction period, greatly reducing the repair/construction cost and improving the safety in the construction process.
Description
Technical Field
The invention belongs to the technical field of pipeline maintenance, and particularly relates to a field repairing method of a JPCCP (joint sealing joint).
Background
The prestressed steel cylinder concrete jacking pipe (JPCCP pipe for short) is a composite pipe produced by comprehensively utilizing tensile property, impermeability and concrete compressive property of steel and adopting a prestress process, is a novel large-caliber pipe developed on the basis of the prestressed steel cylinder concrete pipe (PCCP), and is usually applied to non-excavation large-caliber pressure water delivery and pressurized sewage discharge engineering. The prestressed concrete pipe jacking pipe is formed by adopting a steel cylinder with a bell and spigot made of steel and pouring concrete with a certain thickness inside and outside the cylinder body after water pressure inspection as a pipe core, winding prestressed steel wires with a certain density outside the pipe core according to working conditions, matching a steel reinforcement cage outside the prestressed steel wires, and pouring concrete with a certain thickness, so that a JPCCP finished product is formed, the maximum caliber can reach 4 meters, and the JPCCP pipe jacking pipe has strong internal pressure and external load resistance and ensures the safe operation of an underground water delivery pipeline.
Document CN202302366U discloses a prestressed concrete cylinder jacking pipe, which comprises a concrete pipe core and outer ring reinforced concrete positioned outside the concrete pipe core, wherein one end of the concrete pipe core and one end of the outer ring reinforced concrete are both spigot ends, and the other end of the concrete pipe core and the outer ring reinforced concrete are both spigot ends, the concrete pipe core is a concrete pipe core formed by pouring concrete in a cavity formed by cylindrical inner and outer steel templates, a bottom die and a top die, a cylindrical steel cylinder is fixed in the cavity before pouring, so that the spigot end of the concrete pipe core is provided with a spigot steel ring, and the spigot end is provided with a spigot steel ring; one end of the cylindrical steel cylinder corresponding to the female end is connected with the female steel ring, and the other end of the cylindrical steel cylinder corresponding to the male end is connected with the socket steel ring; the outer ring of the reinforced concrete means that: placing a steel reinforcement framework outside the concrete pipe core, placing a cylindrical steel template outside the steel reinforcement framework, then pouring outer ring reinforced concrete, wherein the socket end part of the outer ring reinforced concrete is higher than the socket end part of the concrete pipe core during pouring, and the poured concrete covers the concrete top surface of the outer part of the cylindrical steel cylinder of the concrete pipe core to form a complete pressure-bearing plane; the female end of the outer ring reinforced concrete and the female end of the concrete pipe core are located on the same bottom die during pouring, and the concrete pipe core and the female end of the outer ring reinforced concrete are located on the same plane after pouring; the outer side walls of the female end and the female end of the outer ring of the reinforced concrete are both fixed with reinforced steel rings, and the socket end surface of the outer ring of the reinforced concrete is provided with a grouting channel. The outer surface of the concrete pipe core is wound with prestressed steel wires. The grouting channel is arranged along the semicircular radial direction of the upper end surface of the outer ring of the reinforced concrete. The socket steel ring is provided with a grouting hole, the inner wall of the socket steel ring at the position of the grouting hole is welded with a grouting pipe, the inner wall of the grouting pipe is provided with internal threads which can be connected with the pipe plug, and the grouting hole is communicated with a grouting channel.
At present, in the construction process of the small-diameter long-distance hydraulic tunnel, due to the considerations of safety, environmental protection, economy and the like, the prestressed steel cylinder concrete pipe for the top pipe in the tunnel is more and more. Since the steel cylinder of the JPCCP pipe is only about 1.5mm thick and the liner structure is thin, the ability to withstand external water pressure is weak. In the pipe jacking construction process, under the influence of geology, the direction of the jacking process and the change of jacking force, the stress of the joint part of the JPCCP pipe is in a relative change process, and under the condition that the joint part is repeatedly disturbed, the steel cylinder of the pipe joint is locally separated at the joint part. Before no water flows into the pipe, external water can penetrate into a gap between the steel cylinder and the concrete, and the steel cylinder can further bulge and burst inwards along with the increase of external water pressure (the situation after the bulge and burst inwards of the steel cylinder is shown in figure 1), so that the quality and the service life of the tunnel are influenced. Once the steel cylinder is internally convex, the steel cylinder needs to be maintained in time, the conventional maintenance mode is usually to replace the whole JPCCP, and obviously, the defects of long maintenance period, high maintenance cost, poor safety and the like exist.
Disclosure of Invention
The invention aims to provide a field repair method of a JPCCP pipe, and aims to solve the problems that in the prior art, the field repair construction period of the JPCCP pipe is long, the maintenance cost is high, and the safety is poor.
In order to achieve the purpose, the invention adopts the following technical scheme.
A field repair method of a JPCCP pipe is characterized by comprising the following steps:
step 1, removing all inner-layer tube core concrete of a damaged whole section of tube body;
step 4, after the water seepage channel is plugged, installing a steel lining cylinder on the inner lining of the pipe body, and welding two ends of the steel lining cylinder with bell sockets (the bell sockets refer to bell socket steel rings and spigot steel rings);
step 5, after welding, filling waterproof materials between the steel lining cylinder and the outer layer pipe body through the grease filling hole in the steel lining cylinder until waterproof materials flow out of the grease filling hole, then sealing an exhaust hole in the steel lining cylinder by using a plug, maintaining the filling pressure at 0.5-0.7bar, stabilizing the pressure for 5-15min, then removing grease filling equipment and plugging the grease filling hole;
and 6, paving a reinforcing mesh on the inner wall of the steel lining cylinder, lining the inner wall of the paved pipe body with a fine stone concrete layer, and curing after initial setting.
Preferably, the grease injection hole is formed in the bottom of the steel lining cylinder in advance, and the exhaust hole is formed in the top of the steel lining cylinder in advance.
In order to further reduce the operation difficulty and improve the stability of the repaired JPCCP, the steel lining cylinder before installation is an axial opening cylinder which is processed in advance, the steel lining cylinder is pulled into a state that the outer diameter is smaller than the inner diameter of the outer-layer pipe body, and after the binding force of the axial opening cylinder is removed, the outer wall of the axial opening cylinder is tightly propped against the inner wall of the outer-layer pipe body.
Preferably, the specification of the reinforcing mesh laid in the step 6 is that the reinforcing steel bar is phi 4mm, and the mesh size is 50 multiplied by 100 mm.
Preferably, the thickness of the fine aggregate concrete layer lined in the step 6 is not less than 40mm, and the specification is C40 grade.
Preferably, the waterproof material is epoxy resin.
Compared with the existing mode/process, the method for repairing the damaged (inward bulge and burst of the steel cylinder) JPCCP pipe can be used for rapidly repairing and completing the damaged JPCCP pipe, reducing the repairing difficulty, greatly shortening the construction period (repairing time), greatly reducing the repairing/construction cost and improving the safety in the construction process.
Drawings
FIG. 1 is a schematic diagram of a damaged state of a JPCCP pipe in the embodiment;
FIG. 2 is a first schematic diagram of a JPCCP pipe repairing process in the embodiment;
FIG. 3 is a schematic diagram of a JPCCP pipe repairing process in the embodiment II;
FIG. 4 is a third schematic diagram of a JPCCP pipe repairing process in the embodiment.
In the figure: 1-surrounding rock/soil layer; 2-inner layer core concrete; 3-inner layer reinforcing mesh; 4-external water seepage passage; 5-confined water reserved between the steel cylinder and the outer-layer pipe body; 6, lining a steel cylinder; 7-grease injection holes; 8-exhaust hole; 9-bellmouth steel ring; 10-a socket steel ring; 11-epoxy resin; 12-fine stone concrete lining; 13-burst/damaged area; 14-overbreak clearance; 15-outer layer pipe body.
Detailed Description
The present invention is further described with reference to the following specific embodiments, which should not be construed as limiting the scope of the present invention, and those skilled in the art can make some simple or principle equivalent substitutions or modifications according to the content of the present invention.
Examples
A field repairing method of a JPCCP pipe comprises the following steps:
step 1, removing all inner-layer tube core concrete 2 and inner-layer reinforcing mesh 3 of cracked JPCCP tube sections (damaged whole tube bodies);
and 4, after the lining steel cylinder 6 is in place, respectively welding the lining steel cylinder 6 with the bell mouth steel ring 9 and the spigot steel ring 10 in an annular mode (namely, welding two ends of the steel lining cylinder 6 with the bell and spigot), and detecting that a welding seam is qualified.
Step 5, injecting epoxy resin 11 between the lining steel cylinder 6 and the outer layer pipe body 15 through the grease injection hole 7, wherein in the grease injection process, the injection and exhaust conditions are observed, the injection of the epoxy resin 11 must be continuously carried out until the epoxy resin flows out of the exhaust hole 8, then the exhaust hole 8 on the steel lining cylinder 6 is sealed by a plug, the injection pressure is maintained at 0.5-0.7bar, the grease injection equipment is removed after the pressure is stabilized for 5-15min, and the grease injection hole 7 is sealed, and the state is shown in figure 3 at the moment; after the grease injection is completed, the plugs of the grease injection hole 7 and the exhaust hole 8 are opened, whether water seepage exists or not is observed, and if water seepage exists, the filling is continued;
The field construction proves that the method in the embodiment is adopted to repair one section of JPCCP pipe of DN2000mm in the tunnel, two skilled workers can finish the repair in 3 days (the lining steel cylinder 6 is a finished product structure prefabricated in a factory), and the two skilled workers can finish the repair in 7-8 days by adopting the existing whole section replacement scheme; more importantly, the method in the embodiment only needs to consider the cost of the lining steel cylinder 6, the cost of the inner-layer tube core concrete, the cost of grease injection and the labor cost, and the existing whole-section replacement scheme needs to consider not only all the costs related to the method of the invention, but also the cost of the outer-layer tube body and the cost of surrounding rock/soil layer safety measures on the periphery of the JPCCP tube.
Claims (6)
1. A field repair method of a JPCCP pipe is characterized by comprising the following steps:
step 1, removing all inner-layer tube core concrete of a damaged whole section of tube body;
step 2, cutting the protruding part of the damaged steel cylinder of the pipe body, and discharging water remained in the steel cylinder;
step 3, cutting off the whole section of the deformed steel cylinder, and checking the integrity and the tightness of the pipe body; finding out a water seepage channel and plugging by adopting a waterproof material;
step 4, after the water seepage channel is plugged, installing a steel lining cylinder on the inner lining of the pipe body, and welding two ends of the steel lining cylinder with bell and spigot ports;
step 5, after welding, filling waterproof materials between the steel lining cylinder and the outer layer pipe body through the grease filling hole in the steel lining cylinder until waterproof materials flow out of the grease filling hole, then sealing an exhaust hole in the steel lining cylinder by using a plug, maintaining the filling pressure at 0.5-0.7bar, stabilizing the pressure for 5-15min, then removing grease filling equipment and plugging the grease filling hole;
and 6, paving a reinforcing mesh on the inner wall of the steel lining cylinder, lining the inner wall of the paved pipe body with a fine stone concrete layer, and curing after initial setting.
2. The repair method according to claim 1, characterized in that: the grease injection hole is arranged at the bottom of the steel lining cylinder in advance, and the exhaust hole is arranged at the top of the steel lining cylinder in advance.
3. Repair method according to claim 1 or 2, characterized in that: the steel lining cylinder before installation is an axial opening cylinder processed in advance, the steel lining cylinder is pulled into a state that the outer diameter is smaller than the inner diameter of the outer-layer pipe body, and after the binding force of the axial opening cylinder is cancelled, the outer wall of the axial opening cylinder is tightly propped against the inner wall of the outer-layer pipe body.
4. The repair method according to claim 3, characterized in that: the specification of the reinforcing mesh laid in the step 6 is that the reinforcing steel bar is phi 4mm, and the grid size is 50 multiplied by 100 mm.
5. The repair method according to claim 4, characterized in that: and 6, the thickness of the fine aggregate concrete layer of the lining in the step 6 is not less than 40mm, and the specification is C40 grade.
6. The repair method according to claim 5, characterized in that: the waterproof material adopts epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011000039.5A CN112050021B (en) | 2020-09-22 | 2020-09-22 | On-site repairing method of JPCCP (joint sealing gasket pipe) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011000039.5A CN112050021B (en) | 2020-09-22 | 2020-09-22 | On-site repairing method of JPCCP (joint sealing gasket pipe) |
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| CN112050021A true CN112050021A (en) | 2020-12-08 |
| CN112050021B CN112050021B (en) | 2022-04-26 |
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| CN202011000039.5A Active CN112050021B (en) | 2020-09-22 | 2020-09-22 | On-site repairing method of JPCCP (joint sealing gasket pipe) |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05223195A (en) * | 1992-02-12 | 1993-08-31 | Osaka Gas Co Ltd | Repairing method for pipe fitting part |
| CN102900002A (en) * | 2012-09-17 | 2013-01-30 | 山东省交通科学研究所 | Repair method of structural water damage of asphalt pavement with cement-cured base layer |
| CN103542226A (en) * | 2012-07-17 | 2014-01-29 | 中国长江三峡集团公司 | Method for repairing large-diameter concrete water supply pipeline |
| CN106801768A (en) * | 2017-02-06 | 2017-06-06 | 中国水利水电第十三工程局有限公司 | PCCP pipeline socket rings and steel cylinder weld seam Micro blazed-grating handling process have been installed |
| CN107191733A (en) * | 2017-04-26 | 2017-09-22 | 温州市富诚建设工程有限公司 | A kind of CIPP inverted liners pipeline rehabilitation |
| WO2018069847A1 (en) * | 2016-10-12 | 2018-04-19 | Lembit Maimets | Arch conduit liner and installation method |
| CN110701425A (en) * | 2019-09-12 | 2020-01-17 | 上海井园市政工程有限公司 | Non-excavation type pipeline repairing method |
-
2020
- 2020-09-22 CN CN202011000039.5A patent/CN112050021B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05223195A (en) * | 1992-02-12 | 1993-08-31 | Osaka Gas Co Ltd | Repairing method for pipe fitting part |
| CN103542226A (en) * | 2012-07-17 | 2014-01-29 | 中国长江三峡集团公司 | Method for repairing large-diameter concrete water supply pipeline |
| CN102900002A (en) * | 2012-09-17 | 2013-01-30 | 山东省交通科学研究所 | Repair method of structural water damage of asphalt pavement with cement-cured base layer |
| WO2018069847A1 (en) * | 2016-10-12 | 2018-04-19 | Lembit Maimets | Arch conduit liner and installation method |
| CN106801768A (en) * | 2017-02-06 | 2017-06-06 | 中国水利水电第十三工程局有限公司 | PCCP pipeline socket rings and steel cylinder weld seam Micro blazed-grating handling process have been installed |
| CN107191733A (en) * | 2017-04-26 | 2017-09-22 | 温州市富诚建设工程有限公司 | A kind of CIPP inverted liners pipeline rehabilitation |
| CN110701425A (en) * | 2019-09-12 | 2020-01-17 | 上海井园市政工程有限公司 | Non-excavation type pipeline repairing method |
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| CN112050021B (en) | 2022-04-26 |
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