Inhaul cable restraining device in curve pipe jacking rollback construction process

Abstract

The utility model provides an inhaul cable restraining device in the curve pipe jacking retreating construction process, and relates to the technical field of underground pipe jacking construction, the inhaul cable restraining device comprises an inhaul cable restraining device body, the inhaul cable restraining device body is in an axial symmetry distribution shape, and an inner circular ring and an outer circular ring are arranged in the middle of the inhaul cable restraining device body; the inner circular ring and the outer circular ring are fixedly connected with a plurality of inclined struts which are symmetrically distributed; the end part of the inclined strut is connected with the longitudinal plate; the adjacent longitudinal plates are fixedly connected with the annular plate; and a plurality of center rods are arranged in the inner circular ring and are fixedly connected. The main body of the inhaul cable restraining device is simple in structure and convenient to manufacture, the inhaul cable restraining device is distributed in an axial symmetry mode, internal fixation and installation of a pipe joint are facilitated, the trend of an inhaul cable adjusted and restrained by the main body of the inhaul cable restraining device basically coincides with the center line of a curve pipeline, basic guarantee is provided for rollback construction of the curve pipeline, and the construction efficiency is improved. The diameter of the outer contour of the inhaul cable restraining device body is smaller than the inner diameter of a pipe joint, and universality is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to underground jacking pipe construction technical field especially relates to a cable constraint device in the construction process of curved jacking pipe backoff. BACKGROUND

[0002] If underground boulder is encountered in the jacking pipe construction process, it is difficult to continue jacking, at this time, the pipeline backoff scheme can be adopted, and in special circumstances, a plurality of jacking pipe projects have adopted backoff construction steps in the domestic, generally, when it is determined that the jacking pipe project needs to perform backoff operation, the pipe pulling cable is installed in the jacking pipe machine inside, the counterforce frame and the counter jacking jack are installed in the working well, after the pipe is segmented and loosened, the backoff construction is gradually carried out, when the pipe section backoff, the cavity is formed at the front end of the jacking pipe machine, and the backfill material needs to be synchronously injected into the cavity;

[0003] If the jacking pipe backoff construction is a straight line segment, one end of the pipe pulling cable is fixed in the jacking pipe machine inside the pipe section end, and the other end is fixed at the end of the working well jack diffusion plate, when the jacking pipe backoff construction is a straight line segment, the position of the cable is basically coincided with the center line of the pipeline, and the jacking force of the jack is gradually pulled back to realize the backoff movement of the pipe section.

[0004] However, when the jacking pipe backoff construction is a curved segment (superposition of horizontal curve and vertical curve), after the two ends of the pipe pulling cable are connected with the jacking pipe machine inside and the end of the jack diffusion plate, the position of the cable cannot be coincided with the center line of the curved segment pipeline (the cable even scratches the side wall of the pipe section), so that the stress direction of the pipe section is inconsistent with the hole diameter direction during the backoff tensioning, the curved segment pipe section and the surrounding soil body are subjected to excessive bias, the pipe section cannot be effectively backoff, and even the surrounding soil body is excessively deformed, the pipe section is broken, and the backoff construction fails.

[0005] Therefore, a cable constraint device capable of solving the above problems is needed. UTILITY MODEL CONTENTS

[0006] The utility model aims at solving the defects in the prior art, and solves the problems that the cable tension direction is inconsistent with the center line of the curved pipeline during the pipe section backoff construction process of most existing curved pipeline segments.

[0007] In order to realize the above object, the utility model adopts the following technical scheme: a cable constraint device in the construction process of curved jacking pipe backoff, including cable constraint device main part, the cable constraint device main part is axially symmetrical distribution shape, and the middle part is provided with inner ring and outer ring;The inner ring, the outer ring and a plurality of symmetrical distribution inclined braces are fixedly connected;The end of the inclined brace is connected with the longitudinal plate;The adjacent longitudinal plates are fixedly connected with the annular plate;A plurality of central rods are fixedly connected in the inner ring.

[0008] Preferably, the longitudinal plate and the outer contour of the ring plate are on the same circumference.

[0009] Preferably, the outer contour diameter of the cable constraint device body is smaller than the inner diameter of the pipe joint, the lower pad and the upper pad fix the cable constraint device body inside the pipe joint, and the center point of the cable constraint device body coincides with the center point of the pipe joint.

[0010] Preferably, when the curved pipeline is constructed in a back-off manner, the cable is uniformly and symmetrically inserted into the holes separated by the inner ring, the outer ring and the inclined support, and solid lubricating oil is applied to the part in contact with the cable.

[0011] Preferably, when the curved pipeline is constructed in a back-off manner, a plurality of cable constraint device bodies are reasonably arranged in the pipe joint according to the curvature of the pipeline, so that the cable after adjustment by the cable constraint device body is basically coincided with the center line of the curved pipeline.

[0012] Compared with the prior art, the cable constraint device body has the advantages of simple structure, convenient manufacturing, axial symmetry, convenient internal fixation and installation in the pipe joint, and the cable after adjustment and constraint by the cable constraint device body is basically coincided with the center line of the curved pipeline, which provides basic guarantee for the back-off construction of the curved pipeline. The outer contour diameter of the cable constraint device body is smaller than the inner diameter of the pipe joint, so the cable constraint device body can be used in pipe joints of different diameters, and only the thickness of the pad needs to be adjusted, which has universality and versatility. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the front view of the cable constraint device body;

[0014] Figure 2 is the three-dimensional schematic view of the cable constraint device body Figure One ;

[0015] Figure 3 is the three-dimensional schematic view of the cable constraint device body Figure Two ;

[0016] Figure 4 is the front view of the cable constraint device body arranged inside the pipe joint;

[0017] Figure 5 is the three-dimensional schematic view of the cable constraint device body arranged inside the pipe joint;

[0018] Figure 6 is the schematic view of the cable constraint device body adjusting the direction of the cable Figure One ;

[0019] Figure 7 is the schematic view of the cable constraint device body adjusting the direction of the cable Figure Two ;

[0020] Figure 8 Longitudinal cross-section of the cable restraint device used in the retreat construction of curved pipelines;

[0021] Figure 9 A transverse cross-section of the cable restraint device used in the retreat construction of a curved pipeline.

[0022] Legend:

[0023] 1. Main body of cable restraint device; 1a. Inner ring; 1b. Outer ring; 1c. Diagonal brace; 1d. Longitudinal plate; 1e. Circumferential plate; 1f. Central rod; 2. Pipe section; 3. Lower pad block; 4. Upper pad block; 5. Cable; 6. Pipe jacking machine; 7. Working shaft; 8. Reaction frame. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0026] like Figures 1-9 As shown in the embodiment of this utility model: a cable restraint device in the process of curved pipe jacking retreat construction, including cable restraint device body 1.

[0027] In specific operation, the main body 1 of the cable restraint device is axially symmetrically distributed, with an inner ring 1a and an outer ring 1b in the middle. The inner ring 1a and the outer ring 1b are fixedly connected to multiple symmetrically distributed diagonal braces 1c. The ends of the diagonal braces 1c are connected to the longitudinal plates 1d. The adjacent longitudinal plates 1d are fixedly connected to the circumferential plates 1e. Multiple central rods 1f are fixedly connected inside the inner ring 1a.

[0028] The cable constraint device body 1 is welded by steel components, and has an axisymmetric distribution shape, which is convenient for fixing and installing inside the pipe joint. The inner ring 1a and the outer ring 1b are arranged in the middle of the cable constraint device body 1. The inner ring 1a and the outer ring 1b are fixed and connected with the plurality of symmetrically distributed inclined struts 1c. The plurality of inclined struts 1c uniformly separate the inner ring 1a and the outer ring 1b into symmetrically distributed cavities, thereby providing mutually isolated channels for the subsequent cable 5 to pass through. The adjacent longitudinal plates 1d are fixed and connected with the annular plates 1e. The longitudinal plates 1d should have sufficient length to ensure that the cable constraint device body 1 fixed inside the pipe joint 2 has sufficient stability. The plurality of central rods 1f are arranged in the inner ring 1a and are fixed and connected, thereby ensuring that the overall structure has strong strength and rigidity.

[0029] The outer contours of the longitudinal plates 1d and the annular plates 1e are on the same circumference.

[0030] According to the above technical solution, the outer contour of the cable constraint device body 1 is circular, which is convenient for installation and use inside the circular pipe joint.

[0031] The outer contour diameter of the cable constraint device body 1 is smaller than the inner diameter of the pipe joint 2. The lower pad 3 and the upper pad 4 fix the cable constraint device body 1 inside the pipe joint. The center point of the cable constraint device body 1 coincides with the center point of the pipe joint 2.

[0032] According to the above technical solution, in order to ensure that the cable constraint device body 1 does not overturn and move during the back-off construction process, the width and length of the lower pad 3 are greater than the width and length of the upper pad 4. If necessary, the side part can be further filled and reinforced.

[0033] During the back-off construction of the curved pipeline, the pipe-retracting cable 5 is uniformly and symmetrically passed into the holes separated by the inner ring 1a, the outer ring 1b and the inclined struts 1c. Solid lubricating oil is applied to the part in contact with the cable 5.

[0034] During the back-off construction of the curved pipeline, a plurality of cable constraint device bodies 1 are reasonably arranged in the pipe joint 2 according to the curvature trend of the pipeline, so that the trend of the cable 5 adjusted by the cable constraint device body 1 is basically coincided with the center line of the curved pipeline.

[0035] In summary, the working principle of the utility model is as follows: when the curved pipe segment that has been constructed and positioned needs to be retracted, the number and position of the cable constraint device main body 1 are designed and arranged according to the trend of the pipeline curvature, so that the trend of the cable 5 adjusted by the cable constraint device main body 1 is basically coincident with the center line of the curved pipeline, and the corresponding size and number of the cushion block are manufactured, the cable constraint device main body 1 is fixed in the corresponding position inside the pipe segment according to the design scheme. The cable constraint device main body 1 is fixed inside the pipe segment 2 based on the lower cushion block 3 and the upper cushion block 4, and the center point of the cable constraint device main body 1 is coincident with the center point of the pipe segment 2, the pipe retraction cable is installed, the cables 5 are sequentially passed through the same cavity position of each cable constraint device main body 1, one end of the cable 5 is fixed inside the pipe jacking machine 6 at the end of the pipe segment, and the other end is fixed at the end of the working well 7 jack diffusion plate. The cables 5 are not entangled with each other and are independent of each other, the pipe is formally retracted, the retraction speed is controlled, and the backfill material is pumped to the cavity in front of the pipe jacking machine 6 at the same time. After the first pipe segment is jacked to the working well 7, the retraction operation is paused, and the pipe segment is lifted out of the working well. Continue to retract and construct, when the second pipe segment is jacked to the working well 7, the retraction operation is paused, and the pipe segment is lifted out of the working well 7, and the same is true for the subsequent pipe segments. During the retraction construction process, the cable constraint device main body 1 fixed inside the pipe segment 2 moves synchronously with the pipe segment 2, and the trend of the cable 5 gradually deviates from the center line of the curved pipeline after the pipe segment is retracted and moved. At this time, the retraction construction should be paused, the position of the cable constraint device main body 1 should be adjusted again, the trend of the cable 5 should be basically coincident with the center line of the curved pipeline, and then the retraction construction should be started. The correction and adjustment are repeated until all the pipe segments are retracted and lifted out.

[0036] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms. Any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification of the above embodiments based on the technical essence of the utility model still belongs to the protection scope of the technical scheme of the utility model.

Claims

1. A cable restraint device in a curved pipe jacking back construction process, comprising a main body of the cable restraint device, characterized in that: The cable constraint device body is in an axisymmetric distribution shape, a middle part is provided with an inner ring and an outer ring, the inner ring and the outer ring are fixedly connected with a plurality of symmetrically distributed inclined struts, end portions of the inclined struts are connected with longitudinal plates, the adjacent longitudinal plates are fixedly connected with annular plates, and the inner ring is internally provided with a plurality of central rods fixedly connected.

2. The cable constraint device in a curved pipe back-off construction process according to claim 1, characterized in that: The outer contours of the longitudinal plates and the annular plates are on the same circle.

3. The cable constraint device of claim 1, wherein: An outer contour diameter of the cable constraint device body is smaller than an inner diameter of a pipe joint, the lower pad and the upper pad fix the cable constraint device body in the pipe joint, and a center point of the cable constraint device body coincides with a center point of the pipe joint.

4. The cable restraint device of claim 1, wherein: When the curved pipeline is constructed in a back-off mode, the cable is uniformly and symmetrically pulled into the holes separated by the inner ring, the outer ring and the inclined struts, and solid lubricating oil is applied to the part in contact with the cable.

5. The cable restraint device of claim 1, wherein: When the curved pipeline is constructed in a back-off mode, a plurality of cable constraint device bodies are reasonably arranged in the pipe joint according to a curvature trend of the pipeline, so that the cable after being adjusted by the cable constraint device body is basically coincident with a center line of the curved pipeline.

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