Long-distance pipe jacking local repairing device and repairing construction method

Abstract

The invention provides a long-distance pipe-jacking local repairing device and a repairing construction method, and relates to the technical field of pipe jacking. The long-distance pipe-jacking local repairing device comprises a base, a supporting plate and an abutting strip; the cross section of the base is in an arc shape tightly attached to the inner wall of a jacking pipe, a hinge seat is fixedly arranged in the middle of the base, a cross rod is horizontally and fixedly arranged at the top of the hinge seat in a penetrating mode, hydraulic cylinders are arranged at the two ends of the cross rod, and a control structure for controlling the hydraulic cylinders to coaxially rotate along the cross rod is arranged on the cross rod. The free end of a hydraulic rod of the hydraulic cylinder is fixedly connected with the supporting plate, connecting rods are fixed to the two sides of the top face of the supporting plate, the connecting rods on the two sides are fixedly connected with abutting strips respectively, and the abutting strips are in an arc shape matched with the inner wall of the jacking pipe. The problem that the sealing performance of a pipeline is lost when special conditions such as local leakage occur in the pipeline is solved.

Description

Technical Field

[0001] The invention relates to the technical field of pipe jacking, and in particular to a local repair device for a long-distance pipe jacking and a repair construction method. Background Art

[0002] In recent years, with the rapid development of infrastructure construction in my country, pipe jacking construction, as an important underground excavation method, has reduced the disturbance to above-ground buildings and the direct impact on traffic. Pipe jacking construction relies on the jacking force generated by the jacking equipment to overcome the friction between the pipeline and the surrounding soil, push the pipeline into the soil according to the designed slope, and transport the soil away. It is particularly suitable for underground construction in places such as cities where demolition costs are high.

[0003] During the construction of pipe jacking projects, the sealing requirements between pipe joints are relatively high, and rubber water stop rings can generally meet the requirements. However, once the pipeline has local leakage or other special circumstances during the jacking process, the pipeline will lose its sealing, causing problems such as leakage during the jacking process and increased jacking force, which will affect the entire pipe jacking construction and pipeline functionality. The existing technology mostly uses a cyclic jacking method to push out the problematic pipeline again and replace it with a new one, which has a relatively high construction period and cost, or directly uses grouting treatment at the joints of the problematic pipeline, which has a poor water-stopping effect and a short water-stopping validity period, greatly shortening the service life of the pipeline. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a long-distance pipe jacking local repair device and a construction method, which solves the problem that the pipeline loses its sealing when special circumstances such as local leakage occur in the pipeline.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A local repair device for long-distance jacking pipes, comprising: a base, a support plate and a pressure strip;

[0007] The cross-section of the base is an arc that is close to the inner wall of the top pipe. A hinged seat is fixedly provided in the middle of the base. A cross bar is fixedly provided horizontally on the top of the hinged seat. Hydraulic cylinders are provided at both ends of the cross bar. A control structure for controlling the coaxial rotation of the hydraulic cylinder along the cross bar is provided on the cross bar. The free end of the hydraulic rod of the hydraulic cylinder is fixedly connected to the support plate. Connecting rods are fixed on both sides of the top surface of the support plate. The connecting rods on both sides are fixedly connected with pressure strips respectively, and the pressure strips are arc-shaped that match the inner wall of the top pipe.

[0008] Preferably, the control structure includes a retaining ring and a fixing ring, the end of the cross bar is divided into a limiting portion and a threaded portion, the diameter of the threaded portion is smaller than the diameter of the threaded portion, the retaining ring is slidably arranged on the limiting portion along the length direction of the cross bar, the limiting portion includes a plurality of limiting strips arranged at intervals along the circumference of the cross bar, a plurality of external threads are arranged on the surface of the threaded portion, the threaded portion is arranged on the side of the limiting portion away from the articulated seat, the inner wall of the retaining ring is provided with a recessed portion cooperating with the limiting portion, the hydraulic cylinder is fixed on the retaining ring, and the inner wall of the fixing ring is provided with an internal thread cooperating with the external thread.

[0009] Preferably, a reinforcing plate is fixedly connected between the two sides of the hinge seat and the base.

[0010] Preferably, the angle of the arc corresponding to the base is 60° to 120°.

[0011] Preferably, two connecting rods are arranged on the same side of the top surface of the support plate, and the two connecting rods are commonly and fixedly connected with a pressure strip.

[0012] A repair construction method, comprising the above-mentioned long-distance pipe jacking local repair device, is characterized in that it comprises the following steps:

[0013] S1: Pre-treat the leakage of the jacking pipe;

[0014] S2: Fill with water-expandable waterstop strip;

[0015] S3: Fill the leaking area with epoxy mortar;

[0016] S4: Polysulfide sealant construction: pour the polysulfide sealant into the leaking area and flatten it;

[0017] S5: The rubber sealing tape is laid on the inner wall of the top pipe and covers the leaking part, and is fixed to the inner wall of the top pipe by bolts.

[0018] Preferably, in S1, the pretreatment includes: flushing the mud in the pipeline, roughening and expanding the leaking parts, cleaning the expanded joints, and applying an interface agent on both sides of the expanded joints.

[0019] Preferably, in S5, two pressure strips are respectively located at two sides of the leakage, and the rubber sealing strip is pressed by the pressure strips of the repair device, and then bolt construction is performed.

[0020] The present invention has the following beneficial effects:

[0021] The leaking parts are treated with water-swelling waterstop strips, epoxy mortar, polysulfide sealant and rubber sealing tapes, which can achieve better plugging effect, extend the service life of the pipeline and reduce the treatment cost. The rubber sealing tape is tightened by the pressure strips of the repair device to facilitate construction and improve efficiency.

[0022] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the repair device of the present invention;

[0024] Figure 2 It is a schematic diagram of the side structure of the repair device of the present invention;

[0025] Figure 3 It is a partial structural schematic diagram of the repair device of the present invention;

[0026] Figure 4 It is a schematic diagram of the pipeline local repair structure of the present invention.

[0027] In the above drawings: 1, base; 11, hinged seat; 12, cross bar; 13, reinforcement plate; 2, support plate; 21, connecting rod; 3, pressure strip; 4, hydraulic cylinder; 51, clamping ring; 52, fixing ring; 53, limit strip. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the technical solutions in the present invention are further described below in conjunction with the accompanying drawings and embodiments.

[0029] See also Figures 1 to 3 As shown, a long-distance jacking pipe local repair device comprises: a base 1, a support plate 2 and a pressure strip 3; the cross section of the base 1 is an arc-shaped that fits closely against the inner wall of the jacking pipe, a hinge seat 11 is fixedly provided in the middle of the base 1, a cross bar 12 is horizontally fixedly passed through the top of the hinge seat 11, hydraulic cylinders 4 are provided at both ends of the cross bar 12, a control structure for controlling the coaxial rotation of the hydraulic cylinder 4 along the cross bar 12 is provided on the cross bar 12, the free end of the hydraulic rod of the hydraulic cylinder 4 is fixedly connected to the support plate 2, connecting rods 21 are fixed on both sides of the top surface of the support plate 2, and the connecting rods 21 on both sides are fixedly connected with the pressure strips 3 respectively, and the pressure strips 3 are an arc-shaped that matches the inner wall of the jacking pipe.

[0030] The base 1 can be adapted to the inner wall of the top pipe, and the two pressure bars 3 are arc-shaped to match the inner wall of the top pipe. When the hydraulic rod of the hydraulic cylinder 4 is extended, the two pressure bars 3 can be pressed tightly against the inner wall of the top pipe. The base 1 and the two pressure bars 3 are in contact with the inner wall of the top pipe to form a triangular support, which is stable.

[0031] Furthermore, if Figures 1 to 3 As shown, the control structure includes a retaining ring 51 and a fixing ring 52, the end of the cross bar 12 is divided into a limiting portion and a threaded portion, the diameter of the threaded portion is smaller than the diameter of the threaded portion, the retaining ring 51 is slidably arranged on the limiting portion along the length direction of the cross bar 12, the limiting portion includes a plurality of limiting strips 53 arranged at intervals along the circumference of the cross bar 12, a plurality of external threads are arranged on the surface of the threaded portion, the threaded portion is arranged on the side of the limiting portion away from the articulated seat 11, the inner wall of the retaining ring 51 is provided with a recess matched with the limiting portion, the hydraulic cylinder 4 is fixed on the retaining ring 51, and the inner wall of the fixing ring 52 is provided with an internal thread matched with the external thread. The diameter of the threaded portion is smaller than that of the threaded portion, so that the retaining ring 51 can pass through the threaded portion from the outside and be sleeved on the limiting portion. A limiting strip 53 is provided on the limiting portion, so that the retaining ring 51 cannot rotate on the limiting portion. When the fixing ring 52 is threadedly connected to the threaded portion, the retaining ring 51 can be fixed on the limiting portion, thereby fixing the position of the hydraulic cylinder 4.

[0032] Furthermore, if Figure 1 and Figure 2 As shown, in order to improve the overall stability of the device, reinforcing plates 13 are fixedly connected between the two sides of the hinge seat 11 and the base 1.

[0033] Furthermore, the angle of the arc corresponding to the base 1 is 60° to 120°, so that there is a sufficient contact area between the base 1 and the inner wall of the top pipe.

[0034] Furthermore, if Figure 1 As shown, in order to improve stability, two connecting rods 21 are provided on the same side of the top surface of the support plate 2, and the two connecting rods 21 are fixedly connected to a pressing strip 3.

[0035] A repair construction method, comprising the above-mentioned long-distance pipe jacking local repair device, is characterized in that it comprises the following steps:

[0036] S1: Pre-treat the leakage of the jacking pipe;

[0037] S2: Fill with water-expandable waterstop strip;

[0038] S3: Fill the leaking area with epoxy mortar;

[0039] S4: Polysulfide sealant construction: pour the polysulfide sealant into the leaking area and flatten it;

[0040] S5: The rubber sealing tape is laid on the inner wall of the top pipe and covers the leaking part, and is fixed to the inner wall of the top pipe by bolts.

[0041] Furthermore, in S1, the mud in the pipeline is flushed clean, the leaking parts are roughened and expanded, and the debris and dirt in the seams are removed with a high-pressure water gun. Then, the accumulated water in the seams is removed with absorbent materials such as geotextiles or sponges to keep the seams dry. Then, the interface agent is applied to both sides of the expanded seams for subsequent construction.

[0042] Furthermore, in S2, a water-swellable waterstop strip is inserted into the expanded joint to temporarily block water seepage from the leakage point. The length of the water-swellable waterstop strip in the expanded joint is less than half of the length of the expanded joint.

[0043] Furthermore, in S3, the joints are filled with epoxy mortar and compacted, leaving a depth of 30 mm for filling with polysulfide sealant.

[0044] Furthermore, in S4, when applying the polysulfide sealant, bubbles should be prevented from mixing in, and the seal should be compacted and filled.

[0045] Further, in S5, the rubber sealing tape is first used to cover the gap, so that the two pressing strips 3 are respectively located on both sides of the leakage, and the rubber sealing tape is pressed by the pressing strips 3 of the repair device; then the bolt construction is performed, including screws and nuts, specifically: drilling is performed first. Then the drilled hole is cleaned with compressed air from a cylinder and a brush until it is flat, then the static mixer is installed on the glue bottle, and a small amount of glue that is not completely mixed at the front end is first discharged with a glue gun, and then glue is injected from the bottom of the hole to the hole mouth. The glue is generally filled to at least half of the hole depth, and finally the screw is passed through the rubber sealing tape and slowly rotated into the hole. After the colloid solidifies, the nut is installed and tightened.

[0046] The construction process is as follows: pre-treat the leaking part of the top pipe; fill the water-swelling waterstop strip; fill the leaking part with epoxy mortar; construct the polysulfide sealant, pour the polysulfide sealant into the leaking part and flatten it; lay the rubber sealing tape on the inner wall of the top pipe and cover the leaking part, press the rubber sealing tape with the pressing strip 3 of the repair device, and fix the rubber sealing tape to the inner wall of the top pipe with bolts. The leaking part is treated with the water-swelling waterstop strip, epoxy mortar, polysulfide sealant and rubber sealing tape, which has a better plugging effect, extends the service life of the pipeline, and reduces the processing cost; and the rubber sealing tape is pressed tightly by the pressing strip 3 of the repair device, which is convenient for construction and improves efficiency.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A long distance pipe jacking local repair device, characterized in that: include: A base (1), a support plate (2) and a pressure strip (3); The cross section of the base (1) is an arc shape that is close to the inner wall of the top tube. A hinge seat (11) is fixedly arranged in the middle of the base (1). A cross bar (12) is fixedly passed through the top of the hinge seat (11) horizontally. Hydraulic cylinders (4) are arranged at both ends of the cross bar (12). A control structure for controlling the coaxial rotation of the hydraulic cylinder (4) along the cross bar (12) is arranged on the cross bar (12). The free end of the hydraulic rod of the hydraulic cylinder (4) is fixedly connected to the support plate (2). Connecting rods (21) are fixedly arranged on both sides of the top surface of the support plate (2). The connecting rods (21) on both sides are fixedly connected to pressure strips (3) respectively. The pressure strips (3) are arc-shaped and matched with the inner wall of the top tube.

2. A long distance pipe jacking local repair device as claimed in claim 1, characterized in that: The control structure comprises a clamping ring (51) and a fixing ring (52), the end of the cross bar (12) is divided into a limiting portion and a threaded portion, the diameter of the threaded portion is smaller than the diameter of the threaded portion, the clamping ring (51) is slidably arranged on the limiting portion along the length direction of the cross bar (12), the limiting portion comprises a plurality of limiting strips (53) arranged at intervals along the circumference of the cross bar (12), a plurality of external threads are arranged on the surface of the threaded portion, the threaded portion is arranged on a side of the limiting portion away from the articulated seat (11), the inner wall of the clamping ring (51) is provided with a recessed portion cooperating with the limiting portion, the hydraulic cylinder (4) is fixed on the clamping ring (51), and the inner wall of the fixing ring (52) is provided with an internal thread cooperating with the external thread.

3. A long distance pipe jacking local repair device as claimed in claim 1, characterized in that: A reinforcing plate (13) is fixedly connected between the two sides of the hinge seat (11) and the base (1).

4. A long distance pipe jacking local repair device as claimed in claim 1, characterized in that: The angle of the arc corresponding to the base (1) is 60° to 120°.

5. A long distance pipe jacking local repair device as claimed in claim 1, characterized in that: Two connecting rods (21) are arranged on the same side of the top surface of the support plate (2), and the two connecting rods (21) are fixedly connected to a pressing strip (3) together.

6. A repair construction method, comprising a long-distance pipe jacking local repair device as claimed in any one of claims 1 to 5, characterized in that: The following steps are involved: S1: Pre-treat the leakage of the jacking pipe; S2: Fill with water-expandable waterstop strip; S3: Fill the leaking area with epoxy mortar; S4: Polysulfide sealant construction: pour the polysulfide sealant into the leaking area and flatten it; S5: The rubber sealing tape is laid on the inner wall of the top pipe and covers the leaking part, and is fixed to the inner wall of the top pipe by bolts.

7. A repair construction method as claimed in claim 6, characterized in that: In S1, the pretreatment includes: flushing the mud in the pipeline, roughening the leaking part and expanding the seam, cleaning the expanded seam, and applying an interface agent on both sides of the expanded seam.

8. A repair construction method as claimed in claim 6, characterized in that: In the above-mentioned S5, the two pressing strips (3) are respectively located at the two sides of the leakage point, and the rubber sealing strip is pressed by the pressing strips (3) of the repair device, and then the bolt construction is carried out.

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