CN108223911B - Trenchless repairing method for small-diameter pipeline collapse - Google Patents
Trenchless repairing method for small-diameter pipeline collapse Download PDFInfo
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- CN108223911B CN108223911B CN201711361646.2A CN201711361646A CN108223911B CN 108223911 B CN108223911 B CN 108223911B CN 201711361646 A CN201711361646 A CN 201711361646A CN 108223911 B CN108223911 B CN 108223911B
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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
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
Abstract
The invention discloses a trenchless repairing method for small-diameter pipeline collapse, which relates to the technical field of underground pipeline repairing and comprises the following steps: washing the inner wall of the collapse pipeline at high pressure to wash out sludge and sand sundries in the collapse pipeline; pushing the wedge-shaped steel ejector from one end of the collapsed pipeline until the wedge-shaped steel ejector reaches the other end of the collapsed pipeline through pushing equipment, wherein in the pushing process of the wedge-shaped steel ejector, a pushing surface of the wedge-shaped steel ejector extrudes the collapsed part, and the collapsed part is lifted to a pre-collapse position and supported by a support body; and pulling the lining hose soaked with the resin into the pipeline, expanding the lining hose to be tightly attached to the unfolded inner wall of the folding hinged pipe through pressurized air, and curing. The method can realize trenchless repair of the small-diameter pipeline collapse.
Description
Technical Field
The invention relates to the technical field of underground pipeline repair, in particular to a trenchless repair method for small-diameter pipeline collapse.
Background
The city pipe network system extends along with the development of the city, underground pipelines are laid fast continuously, and pipeline maintenance is a necessary means for ensuring the functions of the underground pipelines. At present, the pipeline repair mainly comprises two modes of excavation repair and trenchless repair. Excavation repair refers to repairing a pipeline after directly excavating earthwork above the pipeline, but the repairing mode seriously affects ground traffic, has low efficiency and environmental problems, and is easy to damage other pipelines to cause secondary damage.
The existing trenchless pipeline repairing technology is mainly used for pipelines with larger pipe diameters, operators have enough space to enter the pipeline for operation, and when small-diameter pipelines collapse, excavation repairing is needed.
Disclosure of Invention
The invention aims to provide a trenchless repairing method for small-diameter pipeline collapse, which solves the problem that the existing trenchless repairing method cannot be adopted for small-diameter pipeline collapse.
The technical scheme adopted for solving the technical problems is as follows: a trenchless repairing method for small-diameter pipeline collapse comprises the following steps:
s1, washing the inner wall of the collapse pipeline at high pressure to flush out silt and sandy soil impurities in the collapse pipeline;
s2, pushing the wedge-shaped steel top from one end of the collapsed pipeline to the other end of the collapsed pipeline through pushing equipment, wherein in the pushing process of the wedge-shaped steel top, a pushing surface of the wedge-shaped steel top extrudes the collapsed part, and the collapsed part is lifted to a pre-collapse position and supported by a support body;
s3, the lining hose impregnated with the resin is pulled into the collapse pipe, and the lining hose is expanded and adhered to the inner wall of the support body by the pressurized air and cured.
As a further improvement of the above technical solution, in step S1, the inner wall of the collapse pipe is washed by high-pressure water flow at the inspection well at one end of the collapse pipe, and the washed sludge and sand impurities are sucked at the inspection well at the other end of the collapse pipe.
As a further improvement of the above technical solution, in step S2, the supporting body is formed by connecting a plurality of sections of foldable articulated tubes, a wedge-shaped steel head is pushed in a segmented manner, the foldable articulated tubes are conveyed into the pushed collapsed pipe in a folded state every time the wedge-shaped steel head is pushed in one section, and then the foldable articulated tubes are unfolded to support the lifted collapsed part.
As a further improvement of the above technical solution, in step S3, the resin-impregnated lining hose is irradiated with ultraviolet light and cured, and the cured lining hose is attached to the inner wall of the folding hinge tube.
As a further improvement of the above technical solution, the method further comprises a preprocessing step before step S1: the pipeline connecting the second inspection well and the first inspection well is plugged by an inflatable air bag; a pipeline connecting the third inspection well and the fourth inspection well is plugged by an inflatable air bag; and paving a temporary pipeline to communicate the first inspection well with the fourth inspection well. Before repairing the collapsed pipeline, a water regulating measure is carried out, so that the original pipeline can normally run in the repairing process; and meanwhile, the pipeline to be repaired is pretreated, namely the pipeline connecting inspection wells at two ends of the pipeline is plugged, so that the operation requirement of repairing the collapsed pipeline is met.
As a further improvement of the above technical solution, after step S1, grouting is performed on the outer wall of the collapsed pipeline to stabilize the soil.
As a further improvement of the above technical solution, before step S2, cement slurry is injected into the inner wall of the second inspection well, which is opposite to the collapse pipe, and the inner wall forms the rear seat. The second inspection well represents the inspection well of which the wedge-shaped steel ejector head starts to push the port in the collapse pipeline, and when the wedge-shaped steel ejector head is pushed, a stable rear seat is required to bear the acting force of the pushing equipment.
As a further improvement of the above technical solution, in step S2, the wedge-shaped steel plug includes a wedge-shaped pushing head at a front end and a base at a rear end, the wedge-shaped pushing head is formed with the pushing surface, and the pushing surface is dustpan-shaped.
As a further improvement of the above technical scheme, the folding articulated pipe includes a first circular arc plate on the upper portion, a second circular arc plate on the lower portion and two connecting assemblies, each connecting assembly includes a first folding plate hinged with the first circular arc plate and a second folding plate hinged with the second circular arc plate, the first folding plate is hinged with the second folding plate, and the unfolding state of the folding articulated pipe is in a circular pipe shape.
The invention has the beneficial effects that: the wedge-shaped steel ejector head is pushed to lift the collapsed part from one end of the collapsed pipeline in a segmented mode, the folding hinged pipes are designed to be inserted into the pipeline and then unfolded, the folding hinged pipes which are unfolded in the segmented mode are connected to form a supporting body of the pipeline, and the trenchless repair of the small-diameter pipeline can be achieved through the repair mode.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.
FIG. 1 is a flow chart of the construction of an embodiment of the present invention;
FIG. 2 is a schematic illustration of the construction of an embodiment of the present invention;
FIG. 3 is a perspective view of a wedge steel plug in an embodiment of the present invention;
FIG. 4 is a schematic view of the embodiment of the present invention as the folding hinged tube is advanced;
FIG. 5 is a schematic view of the embodiment of the present invention showing the folded hinge tube deployed;
figure 6 is a schematic view of the unfolded configuration of the folding hinge tube of the present invention.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
Referring to fig. 1 to 6, a method for repairing the collapsed small-diameter pipeline without excavation includes a pretreatment step before the pipeline is repaired. The pipeline links to each other first inspection shaft, second inspection shaft, third inspection shaft and fourth inspection shaft in proper order, and the pipeline that collapses is located between second inspection shaft and the third inspection shaft. Firstly, at the second inspection well of one end of the collapse pipeline, the pipeline communicated with the first inspection well is plugged by the inflatable air bag 7, at the third inspection well of the other end of the collapse pipeline, the pipeline communicated with the third inspection well and the fourth inspection well is plugged by the inflatable air bag 7, a temporary pipeline is laid to communicate the first inspection well with the fourth inspection well, and a water pump can be installed in the temporary pipeline. Before repairing the collapsed pipeline, the collapsed pipeline to be repaired is pretreated, the pipeline communicated with inspection wells at two ends of the pipeline is plugged, the operation requirement of repairing the collapsed pipeline is met, meanwhile, water transfer measures are carried out, and the original pipeline can normally run in the repairing process.
The trenchless repairing method for the small-diameter pipeline collapse comprises the following steps of:
and S1, washing the inner wall of the collapse pipeline at high pressure by high-pressure water flow at the second inspection well at one end of the collapse pipeline, and absorbing and removing the washed sludge and sandy soil impurities at the third inspection well at the other end of the collapse pipeline.
S2, pushing the wedge-shaped steel ejector head 1 from one end of the collapse pipeline to the other end of the collapse pipeline in a segmented mode through pushing equipment, wherein in the pushing process of the wedge-shaped steel ejector head 1, a pushing surface of the wedge-shaped steel ejector head extrudes the collapse part, the collapse part is lifted to the position before collapse and is supported by a support body, and the support body is formed by connecting a plurality of segments of folding hinged pipes;
when the wedge-shaped steel ejector head 1 is pushed for one section, the folding hinged pipe 2 is firstly conveyed into the pushed collapse pipeline in a folding state, and then the folding hinged pipe 2 is unfolded to support the lifted collapse part.
S3, pulling the lining hose soaked with resin into the collapse pipeline, and expanding the lining hose to be tightly attached to the unfolded inner wall of the folding hinged pipe 2 through pressurized air; the resin-impregnated lining hose is cured by ultraviolet rays and attached to the inner wall of the folding hinge tube 2.
And S1, grouting the outer wall of the collapse pipeline to stabilize the soil, and when the underground depth of the collapse pipeline is shallow, grouting the outer wall of the pipeline from the ground can be selected, and when the underground depth of the collapse pipeline is deep, grouting can be performed by selecting proper injection ports at two ends of the collapse pipeline at the second inspection well or the third inspection well, so that the stability of the soil near the collapse pipeline is ensured, and the soft soil layer and the quicksand stratum around the collapse part are solidified. Specifically, a pipeline collapse position is grouted by adopting a specec PUR grouting technology, H100 is adopted for water plugging, and then H40 is adopted for stabilizing a soil body.
In step S2, referring to fig. 2, the hydraulic ram 3 is first pushed into the wedge-shaped steel plug 1 by the first electric oil pump 5, and the wedge-shaped steel plug 1 includes a wedge-shaped pusher at the front end and a base at the rear end, and the wedge-shaped pusher is formed with a dustpan-shaped pushing surface. Wherein, the base of wedge steel top 1 rear end is connected to hydraulic push rod 3's one end, and vertical jack 41 movable sleeve is equipped with foldable articulated pipe 2, and the telescopic link is connected to vertical jack 41's the other end, and the telescopic link is not marked in the drawing. Before operation S2, cement slurry is injected into the inner portion of the rear wall of the second inspection well facing away from the collapse pipe, the inner wall forms a rear seat, and the other end of the telescopic rod abuts against the rear seat. In addition, under the action of the hydraulic push rod 3, the pushing surface at the front end of the wedge-shaped steel ejector head 1 continuously extrudes the collapse part and lifts the collapse part to the position before collapse. The length of the folding articulated pipe 2 is preferably 40mm, therefore the propelling distance of each section of the wedge-shaped steel top head 1 is also preferably 40mm, after each section of the wedge-shaped steel top head 1 is propelled, a constructor can directly propel the folding articulated pipe 2 at a second inspection well, wherein the folding articulated pipe 2 comprises a first arc plate 21 at the upper part, a second arc plate 22 at the lower part and two connecting assemblies, each connecting assembly comprises a first folding plate 23 hinged with the first arc plate 21 and a second folding plate 24 hinged with the second arc plate 22, the first folding plate 23 is hinged with the second folding plate 24, and the unfolding state of the folding articulated pipe 2 is in a circular tube shape. After the foldable hinged pipe 2 is pushed to the collapsed position just extruded and lifted by the wedge-shaped steel top 1, referring to fig. 5, the second electric oil pump 6 moves the push rod of the horizontal jack 42 towards both ends, and pushes the hinged opening of the first folding plate 23 and the second folding plate 24 outwards, so as to form the state shown in fig. 6. Thereafter, the pushing construction of the wedge-shaped steel ejector 1 and the installation construction of the folding articulated pipe 2 are repeated until the work of installing the collapse pipe support body is completed. Through advancing wedge steel top 1 from the pipeline one end segmentation that collapses to expand behind the folding articulated pipe 2 embedding pipeline of design, the folding articulated pipe 2 that the multistage was expanded links to each other the back and forms the supporter of pipeline, solves the small diameter pipeline and can't adopt to draw the excavation mode to carry out non-excavation restoration, also need not dig the earthwork of pipeline top and excavate the restoration. The method is particularly suitable for trenchless repair of the collapse of the small-diameter flexible pipeline, the resistance borne by the wedge-shaped steel top head 1 in the pushing process is small when the small-diameter flexible pipeline is repaired, the flexible pipeline is increasingly used for the small-diameter pipeline at present, and the proportion of the collapse of the small-diameter pipeline to the total collapse of the pipeline is high. It is of course also possible to apply the method of the invention to other trenchless rehabilitation of pipe collapse.
In addition, in the step S3, the main materials of the lining hose are ECR (E-Glass of chemical resistance) Glass fiber, thermosetting resin, and photo-curing initiator. It should be noted that before the lining hose is pulled in, a cushion film should be laid in the original pipeline, the cushion film should be placed at the bottom of the original pipeline and should cover the circumference of the pipeline which is larger than 1/3, and the purpose of laying the cushion film is to reduce the friction force during the pulling-in process of the hose and avoid scratching the hose. When the hose is pulled in, the lining hose impregnated with the resin is smoothly, flatly and slowly pulled into the original pipeline along the pad film at the bottom of the hose, the pulling speed is not more than 5m/min, and the pulling force is not more than 122 KN. Meanwhile, after compressed air is introduced, the lining hose is expanded to be attached to the inner wall of the unfolded folding hinged pipe 2, and pressure is maintained for a period of time, so that the lining hose is attached to the inner wall of the folding hinged pipe 2.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (8)
1. A trenchless repairing method for small-diameter pipeline collapse is characterized by comprising the following steps:
s1, washing the inner wall of the collapse pipeline at high pressure to flush out silt and sandy soil impurities in the collapse pipeline;
s2, pushing a wedge-shaped steel top head from one end of a collapsed pipeline until the wedge-shaped steel top head reaches the other end of the collapsed pipeline through pushing equipment, wherein in the pushing process of the wedge-shaped steel top head, a pushing surface of the wedge-shaped steel top head extrudes the collapsed part, the collapsed part is lifted to the position before collapse and is supported by a support body, the wedge-shaped steel top head comprises a wedge-shaped pushing head at the front end and a base at the rear end, the wedge-shaped pushing head is formed with the pushing surface, the support body is formed by connecting a plurality of sections of folding hinged pipes, the wedge-shaped steel top head is pushed in a segmented mode, each section of the wedge-shaped steel top head is pushed, the folding hinged pipes are conveyed into the pushed collapsed pipeline in a folded state, and then the folding hinged pipes are unfolded;
s3, the lining hose impregnated with the resin is pulled into the collapse pipe, and the lining hose is expanded and adhered to the inner wall of the support body by the pressurized air and cured.
2. The trenchless rehabilitation method for small diameter pipeline collapse according to claim 1, characterized in that: in step S1, the inner wall of the collapse pipe is washed by high-pressure water flow at the inspection well at one end of the collapse pipe, and the washed sludge and sand impurities are removed at the inspection well at the other end of the collapse pipe.
3. The trenchless rehabilitation method for small diameter pipeline collapse according to claim 1, characterized in that: in step S3, the resin-impregnated lining hose is cured by irradiating it with ultraviolet light, and the cured lining hose is attached to the inner wall of the folded hinge tube.
4. The trenchless rehabilitation method for small diameter pipeline collapse according to claim 1, further comprising a pretreatment step before step S1:
the pipeline connecting the second inspection well and the first inspection well is plugged by an inflatable air bag;
a pipeline connecting the third inspection well and the fourth inspection well is plugged by an inflatable air bag;
and paving a temporary pipeline to communicate the first inspection well with the fourth inspection well.
5. The trenchless rehabilitation method for small diameter pipeline collapse according to claim 1, characterized in that: after step S1, grouting the outer wall of the collapsed pipeline to stabilize the soil.
6. The trenchless rehabilitation method for small diameter pipeline collapse according to claim 1, characterized in that: before step S2, cement slurry is injected into the rear wall of the second inspection well facing away from the collapse tunnel, the rear wall forming a rear seat.
7. A method of trenchless rehabilitation of small diameter pipe collapses as claimed in any of claims 1 to 6, wherein: the propelling surface is dustpan-shaped.
8. A trenchless rehabilitation method for small diameter pipe collapse as claimed in claim 1 or 3 wherein: folding articulated pipe includes first circular arc board on upper portion, second circular arc board and two coupling assembling of lower part, each coupling assembling include with first circular arc board articulated first folded sheet and with second circular arc board articulated second folded sheet, first folded sheet is articulated with the second folded sheet, the expansion state of folding articulated pipe is the pipe form.
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| CN201711361646.2A CN108223911B (en) | 2017-12-18 | 2017-12-18 | Trenchless repairing method for small-diameter pipeline collapse |
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| CN201711361646.2A CN108223911B (en) | 2017-12-18 | 2017-12-18 | Trenchless repairing method for small-diameter pipeline collapse |
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| CN110726033B (en) * | 2019-10-30 | 2021-08-27 | 南京华享环境科技有限公司 | Underground traction type trenchless pipeline repairing method |
| CN111075994A (en) * | 2019-12-03 | 2020-04-28 | 上海市基础工程集团有限公司 | Flexible pipeline repairing construction method |
| CN110906103A (en) * | 2019-12-17 | 2020-03-24 | 上海水务建设工程有限公司 | Spraying method for repairing water supply pipeline from inside |
| CN111677972B (en) * | 2020-05-31 | 2021-11-05 | 中国电建集团华东勘测设计研究院有限公司 | Prefabricated steel ring construction method applied to rapid repair of pressure pipeline |
| CN111853419A (en) * | 2020-06-30 | 2020-10-30 | 厦门安越非开挖工程技术股份有限公司 | Repairing device and repairing method for deformed or collapsed plastic pipeline |
| CN112066151A (en) * | 2020-09-28 | 2020-12-11 | 新疆鼎立非开挖工程有限公司 | Trenchless repair device and repair method for partial incomplete collapse of double-wall corrugated pipe |
| CN114233976B (en) * | 2021-12-24 | 2022-08-26 | 中国地质大学（武汉） | Automatic integrated non-excavation pipeline grouting system and grouting method |
| CN115750995B (en) * | 2022-11-08 | 2023-07-07 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队(山东省地矿工程勘察院) | Device and method for in-situ trenchless treatment of karst collapse risk points |
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| KR100835869B1 (en) * | 2007-01-16 | 2008-06-09 | 주식회사 새미래환경이엔씨 | Repairing method for sewing or drain pipe using mechanical winch |
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| CN103603998A (en) * | 2013-11-27 | 2014-02-26 | 太仓市晨洲塑业有限公司 | Jacking pipe used for trenchless construction |
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