Reinforcing structure and reinforcing device for electric power trenchless dragging pipe back-to-reaming hole

Abstract

The utility model provides an electric power trenchless dragging pipe back-to-reaming inner reinforcing structure and a reinforcing device. The electric power trenchless dragging pipe back-to-reaming inner reinforcing structure comprises the reinforcing device used for bundling a plurality of electric power conduits. The reinforcing device comprises a plurality of reinforcing pipes extending in the same direction as the power conduit and a plurality of elastic binding belts sleeving the reinforcing pipes at intervals in the extending direction, and the inner side of each elastic binding belt is fixed to the outer wall of the corresponding reinforcing pipe. The elastic binding belt elastically contracts to bind the electric power conduit in the inner side space and provides acting force enabling the reinforcing pipes to be close to each other, and the reinforcing pipes are provided with a plurality of through holes enabling the inside and the outside of the pipe bodies to be communicated. And filling materials are poured into the reinforcing pipe, and the filling materials are overflowed through the through holes to fill the space between the back-reaming hole and the electric power conduit.

Description

Technical Field

[0001] This utility model relates to a reinforcement structure and reinforcement device for the internal expansion hole of trenchless power pipe laying. Background Technology

[0002] Trenchless directional pipe laying for power lines is an underground pipeline laying technology that requires little or no surface excavation. It involves drilling a pilot hole along a pre-set trajectory using a directional drilling rig, enlarging the hole in stages, and then pulling the finished pipe back into place in one go. (See attached document.) Figure 1 It is particularly suitable for crossing sensitive areas such as roads, railways, rivers, and building complexes, and is the mainstream trenchless construction method for urban pipeline network renovation and new construction. However, this method often neglects the reinforcement of the borehole after expansion, and in soft soil / sandy soil, local collapse can easily occur due to borehole expansion, leading to ground subsidence.

[0003] Existing technologies are mostly passive defenses, such as reducing the diameter of the expander and increasing the drag depth, but there is no technology to reinforce the expander hole. This results in problems such as poor economy, low operability, and limited applicable scenarios. Utility Model Content

[0004] To address the issue of ground settlement after trenchless pipe laying, this utility model proposes a reinforcement structure and device for the backfill hole of trenchless pipe laying in power systems, which is achieved through the following technical means.

[0005] A trenchless power pipe backfill reinforcement structure includes a reinforcement device for bundling several power conduits. The reinforcement device includes several reinforcement pipes extending in the same direction as the power conduits, and several elastic binding straps spaced apart on the reinforcement pipes along the extension direction. The inner side of each elastic binding strap is fixed to the outer wall of each reinforcement pipe. The number of reinforcement pipes is three or more, and the reinforcement pipes are arranged at equal circumferential distances inside the elastic binding straps. The elastic binding straps elastically contract to bind the power conduits in the inner space and provide a force to bring the reinforcement pipes closer together. The reinforcement pipes are provided with multiple through holes that connect the inside and outside of the pipes. The reinforcement pipes are filled with a filler, which overflows through the through holes and fills the space between the backfill and the power conduits.

[0006] Preferably, the inner side of the elastic restraint band is bonded to the outer wall of the reinforcing tube by an adhesive.

[0007] Preferably, the elastic restraint band is provided with at least one movable connecting device, which is used to allow the elastic restraint band to be disconnected or connected.

[0008] Preferably, the filler is cement mortar.

[0009] A reinforcement device includes a plurality of reinforcing tubes extending in the same direction, and a plurality of elastic binding straps spaced apart on the reinforcing tubes along the extension direction. The inner side of each elastic binding strap is fixed to the outer wall of each reinforcing tube. The number of reinforcing tubes is three or more, and the reinforcing tubes are arranged at equal circumferential distances on the inner side of the elastic binding straps. When stretched, the elastic binding straps provide a force that brings the reinforcing tubes together. The reinforcing tubes are provided with a plurality of through holes that connect the inner and outer parts of the tubes.

[0010] Preferably, the elastic restraint band is provided with at least one movable connecting device, which is used to allow the elastic restraint band to be disconnected or connected.

[0011] Preferably, the outer wall of the reinforcing tube is covered with adhesive tape to cover the through hole.

[0012] Preferably, in its natural state, the elastic restraint band contracts to bring the reinforcing tube closer together until the outer walls abut against each other.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] 1) The reinforcement device has a simple structure and is very easy to assemble and fix with the power conduit. It not only serves to bind the power conduit, but also allows for the injection of filler into the back-expanding hole after the pipeline is laid, making construction convenient.

[0015] 2) This reinforcement structure directly addresses the root cause of the problem. It bundles the power conduits to facilitate cable laying and effectively solves the issue of full filling material. Once the filling material (cement mortar) hardens, it provides excellent reinforcement to the reaming hole, significantly reducing ground settlement after trenchless pipe laying. Compared to existing passive defense methods, such as reducing the diameter of the reamer and increasing the dragging depth, this method offers better economy, operability, and applicability to various scenarios. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cross-section of a trenchless directional duct for power transmission.

[0017] Figure 2 This is a cross-sectional view of the reinforcement structure inside the back-expanding hole for trenchless power pipe laying.

[0018] Figure 3 This is a cross-sectional view of the reinforcement device.

[0019] Figure 4 This is a schematic diagram of the assembly structure of the reinforcement device and the power conduit.

[0020] Figure 5 This is a partial structural diagram of the reinforced pipe. Detailed Implementation

[0021] The following description, in conjunction with the accompanying drawings, further illustrates the proposed solution.

[0022] See appendix Figures 2 to 5 A reinforcement structure for trenchless power pipe backfilling hole includes a power conduit 1 and a reinforcement device 2 for bundling several power conduits 1.

[0023] The reinforcement device 2 includes several reinforcement tubes 21 extending in the same direction as the power conduit 1, and several elastic restraint straps 22 spaced apart on the reinforcement tubes 21 along the extension direction. The inner side of each elastic restraint strap 22 is fixed to the outer wall of each reinforcement tube 21. For example, the inner side of the elastic restraint strap 22 is fixed to the outer wall of the reinforcement tube 21 by hot melting or adhesive bonding. The reinforcement tubes 21 are set 2 meters apart on the inner side of the elastic restraint straps 22, which can effectively fix the reinforcement device around the power conduit 1.

[0024] The elastic restraint band 22 elastically contracts to bind the power conduit 1 within the inner space. When stretched, the elastic restraint band 22 provides a force that brings the reinforcing pipes 21 together. The reinforcing pipes 21 have multiple through holes 210 connecting the inside and outside of the pipe. The reinforcing pipes 21 are filled with a filler material 3, which overflows through the through holes 210 to fill the space between the reaming hole 4 and the power conduit 1. During construction, the filler material 3 is poured into the reinforcing pipes 21 and overflows through the through holes 210 to fill the space between the reaming hole 4 and the power conduit 1. The filler material 3 is cement mortar. The reinforcing pipes 21 effectively solve the problem of filling the filler material 3. After the cement mortar hardens, it provides good reinforcement to the reaming hole 4, significantly reducing ground settlement after trenchless pipe laying.

[0025] In order to better constrain the power conduit 1 in the middle position and to more evenly inject the filler 3, the reinforcement device 2 includes three or more reinforcement tubes 21, and the reinforcement tubes 21 are arranged at equal circumferential distances inside the elastic restraint band 22.

[0026] Meanwhile, considering that during pipeline pullback, soil in the reaming hole may enter the pipe through the through hole 210 of the reinforcement pipe 21, causing blockage and potentially affecting subsequent grouting operations; see appendix. Figure 5 The outer wall of the reinforcing tube 21 is covered with adhesive tape 211 ( Figure 5 The dotted texture in the diagram indicates the coverage of the adhesive tape to cover the through hole 210 and prevent soil from entering. When the filler 3 is injected using a pressure pump, the filler 3 will break through the adhesive tape 211 under the pressure inside the reinforcing pipe 21, and the injection will be completed smoothly.

[0027] Furthermore, to facilitate the assembly of the reinforcement device and the power conduit, the elastic restraint strap 22 is provided with a movable connecting device 221 (e.g., a belt buckle). The movable connecting device 221 is used to allow the elastic restraint strap 22 to be disconnected or connected. During assembly, the movable connecting device 221 is first opened to disconnect the elastic restraint strap 22 and lay it flat. At this time, each reinforcement tube 21 is also laid flat on the ground. Then, the power conduit is placed in the middle of the elastic restraint strap 22, and then each elastic restraint strap 22 is stretched one by one until the movable connecting device 221 is fastened, easily completing the binding of the power conduit 1 by the reinforcement device 2.

[0028] Furthermore, to ensure that the elastic restraint strap 22 can adapt to various specifications or quantities of electrical conduits, it must be selected such that the elastic restraint strap 22, when contracted, can bring the reinforcing tube 21 together until the outer walls abut. In other words, in the non-working state, the reinforcing tube 21 will be tightly restrained. (See attached diagram.) Figure 3 In the working state, the reinforcing tube 21 becomes a frame supporting the outward extension of the elastic restraint band 22, see Appendix. Figure 4 .

[0029] The above preferred embodiments should be regarded as illustrative examples of the embodiments of the present application. Any technical deductions, substitutions, improvements, etc. that are similar to or based on the present application should be considered within the scope of protection of this patent.

Claims

1. A reinforcement structure for trenchless power pipe backfilling borehole, characterized in that, The device includes a reinforcement apparatus for bundling several electrical conduits; the reinforcement apparatus includes several reinforcement tubes extending in the same direction as the electrical conduits, and several elastic binding straps spaced apart on the reinforcement tubes along the extension direction, the inner side of each elastic binding strap being fixed to the outer wall of each reinforcement tube; the number of reinforcement tubes is three or more, and the reinforcement tubes are arranged at equal circumferential distances on the inner side of the elastic binding straps; the elastic binding straps elastically contract to bundle the electrical conduits in the inner space and provide a force to bring the reinforcement tubes together; the reinforcement tubes are provided with multiple through holes that connect the inner and outer parts of the tubes; the reinforcement tubes are filled with a filler, and the filler overflows through the through holes to fill the space between the expansion hole and the electrical conduit.

2. The reinforcement structure inside the back-reaming hole for trenchless power pipe laying according to claim 1, characterized in that, The inner side of the elastic restraint band is bonded to the outer wall of the reinforcing tube with adhesive.

3. The reinforcement structure inside the back-reaming hole for trenchless power pipe laying according to claim 1, characterized in that, The elastic restraint band is provided with at least one movable connecting device, which is used to allow the elastic restraint band to be disconnected or connected.

4. The reinforcement structure inside the back-reaming hole for trenchless power pipe laying according to claim 1, characterized in that, The filler is cement mortar.

5. A reinforcement device, characterized in that, It includes several reinforcing tubes extending in the same direction, and several elastic binding straps spaced apart on the reinforcing tubes along the extension direction. The inner side of each elastic binding strap is fixed to the outer wall of each reinforcing tube. The number of reinforcing tubes is three or more, and the reinforcing tubes are arranged at equal circumferential distances on the inner side of the elastic binding straps. When stretched, the elastic binding straps provide a force that brings the reinforcing tubes together. The reinforcing tubes are provided with multiple through holes that connect the inside and outside of the tubes.

6. The reinforcement device according to claim 5, characterized in that, The elastic restraint band is provided with at least one movable connecting device, which is used to allow the elastic restraint band to be disconnected or connected.

7. The reinforcement device according to claim 5, characterized in that, The outer wall of the reinforcing tube is covered with adhesive tape to cover the through hole.

8. The reinforcement device according to claim 5, characterized in that, In its natural state, the elastic restraint band contracts to bring the reinforcing tube closer together until the outer walls abut.

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