A highway abutment backfilling reserved grouting device

Abstract

The utility model relates to the technical field of highway engineering construction, concretely is a kind of highway platform backfilling reserved grouting device.The device includes annular connecting pipe, a plurality of fixedly connected in annular connecting pipe's grouting pipe, with the grouting pipe corresponding arrangement's slurry pipeline, the slurry pipeline with the upper end of grouting pipe intercommunication, switch valve is set on the slurry pipeline.This device is advanced by grouting pipeline in the stage of deck plate construction, completely saves the core step of " later drilling " in traditional scheme.No need to close the road in operation, both avoid the traffic efficiency decline, traffic jam problem caused by the closed construction of traffic artery such as highway, also eliminate the security risk that construction personnel enters the traffic road operation, simultaneously save drilling equipment lease, road closure management etc. cost, greatly reduce construction cost.

Description

Technical Field

[0001] This utility model relates to the field of highway engineering construction technology, specifically to a grouting device for highway abutment backfilling. Background Technology

[0002] Bridge approach slab settlement occurs when differential settlement at the bridge approach and expansion joints (bridge approach ramps) or damage to the expansion joints causes steps to appear on the longitudinal slope of the road surface, resulting in vehicles jumping over them. The hazards of bridge approach slab settlement mainly manifest as impacting driving safety, reducing driving speed, and accelerating bridge and road surface deterioration, significantly affecting the operation of roads and bridges. Causes of bridge approach slab settlement include uneven settlement, sudden changes in stiffness, and vehicle speed and vibration resistance. Uneven settlement of the abutment backing during highway operation, causing the approach slab to detach, is the primary cause of bridge approach slab settlement. Traditionally, uneven settlement of the abutment backing during highway operation is addressed primarily through post-construction drilling and grouting. While this method can largely achieve the goal of reinforcing the abutment backing and reducing uneven settlement, it also has many drawbacks. Post-construction drilling and grouting requires the closure of the road currently in use, which is particularly time-consuming, labor-intensive, and costly, especially for highways, with unsatisfactory results and significant safety hazards. Utility Model Content

[0003] To address the aforementioned problems in the prior art, this utility model provides a pre-embedded grouting device for highway abutment backfill. During the construction of the abutment slab 8, the grouting pipeline is pre-embedded in advance so that grouting operations can be carried out in a timely and convenient manner when uneven settlement occurs in the abutment backfill layer. This effectively solves the problem of uneven settlement in the abutment backfill layer and avoids the impact of subsequent drilling and grouting on normal road traffic.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a grouting device for highway abutment backfilling, comprising a circumferential connecting pipe, a plurality of grouting pipes fixedly connected to the circumferential connecting pipe, and a grout delivery pipe corresponding to the grouting pipes, wherein the grout delivery pipe is connected to the upper end of the grouting pipe, and a switch valve is provided on the grout delivery pipe.

[0005] With the above structural design, the circumferential connecting pipes form a unified network of multiple grouting pipes, allowing the grout to flow between each pipe and avoiding local grouting failure caused by blockage of a single pipe. The grout delivery pipes are equipped with corresponding on / off valves to control the grouting status of each pipe individually, enabling grouting in different areas and stages and improving grouting uniformity. The overall structural design allows the grouting device to be pre-embedded during backfilling construction, avoiding later drilling and grouting and reducing the impact on road operation.

[0006] Preferably, the circumferential connecting pipe includes multiple four-way connectors and a connecting pipe for connecting adjacent four-way connectors. The end of the connecting pipe is detachably connected to the interface of the four-way connector. The end of the grouting pipe is detachably connected to the four-way connector, and the end of the grout delivery pipe is detachably connected to the four-way connector.

[0007] The above structural design, with its four-way connector and detachable connection method, facilitates the transportation, installation, and maintenance of each component, reducing construction difficulty. The detachable structure allows for adjustment of the length of the connecting pipes and the number of grouting pipes according to actual engineering needs, improving the versatility and adaptability of the device. When a component is damaged, the damaged component can be replaced individually without replacing the entire device, reducing maintenance costs.

[0008] Preferably, the lower end of the grouting pipe is tapered, and multiple grout outlet holes are formed on the circumferential wall of the grouting pipe.

[0009] With the above structural design, the conical lower end facilitates the insertion of the grouting pipe into the crushed stone filling layer and the backfill soil of the abutment, reducing installation resistance; multiple grout outlets are distributed on the circumferential wall, allowing the grout to diffuse evenly from multiple directions, avoiding unidirectional concentrated flow of grout, and improving the grouting range and uniformity; the grout outlet design can reduce grout flow resistance, reduce grouting pressure requirements, and avoid damage to the abutment structure caused by excessive pressure.

[0010] Preferably, the grouting pipe is made of a rigid material.

[0011] The above structural design ensures that the rigid material will not deform or break under the pressure of the backfill soil, thus ensuring unobstructed grouting channels; it avoids the bending and blockage problems that may occur with flexible pipes, ensuring the stability of the grouting process; the rigid structure facilitates precise positioning and installation, ensuring that the grouting pipe is in the designed position and guaranteeing the grouting effect.

[0012] Preferably, the inlet of the grout delivery pipe is provided with a matching pipe plug.

[0013] With the above structural design, in the non-grouting state, the plug can effectively prevent debris from entering the grout delivery pipe and grouting pipe, avoiding pipe blockage; protect the inside of the pipe from external environmental corrosion, extending the service life of the device; and facilitate pipe sealing inspection before grouting, ensuring stable grouting pressure.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This device completely eliminates the core step of "post-drilling" in traditional solutions by pre-embedding grouting pipes during the slab construction phase. It avoids the need to close operational roads, preventing reduced traffic efficiency and congestion caused by closing major roads like highways for construction. It also eliminates safety hazards for construction workers entering accessible roads, saving on drilling equipment rental and road closure management costs, significantly reducing construction costs. The circumferential connecting pipes prevent localized failures caused by single-pipe blockages, and the on / off valves enable zoned grouting. Combined with multi-directional grout outlets, this ensures uniform grout diffusion and resolves the issue of slab voids and residue. Attached Figure Description

[0015] Figure 1 This is a top view of the structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model; Figure 3 This is a partially enlarged structural schematic diagram of the present invention; Figure 4 This is a side view of the structure of this utility model. Detailed Implementation

[0016] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 This utility model provides a technical solution: a grouting device for backfilling highway abutments, including a circumferential connecting pipe 1, a plurality of grouting pipes 2 fixedly connected to the circumferential connecting pipe 1, and a grout delivery pipe 3 corresponding to the grouting pipes 2. The grouting pipes 2 are arranged vertically downward, and the grout delivery pipe 3 is connected to the upper end of the grouting pipes 2. A switch valve 4 is provided on the grout delivery pipe 3.

[0017] The circumferential connecting pipe 1 includes multiple four-way connectors 11 and connecting pipes 12 for connecting adjacent four-way connectors 11. The end of the connecting pipe 12 is detachably connected to the interface of the four-way connector 11. The end of the grouting pipe 2 is detachably connected to the four-way connector 11. Multiple sets of connecting pipes 12 are provided. When the length of one connecting pipe 12 cannot meet the distance between the four-way connectors 11, the connecting pipes 12 can be connected to each other to lengthen them, thereby adapting to the distance between the four-way connectors 11.

[0018] The pipe connections between the four-way connector 11 and the connecting pipe 12, the four-way connector 11 and the grouting pipe 2, and the four-way connector 11 and the grout delivery pipe 3 are achieved through flange connections, clamp connections, or welding. For example, one end of the connecting pipe 12 is directly welded to one interface of the first four-way connector 11, and the other end of the connecting pipe 12 is directly welded to one interface of the second four-way connector 11, and so on, connecting end to end, until multiple four-way connectors 11 and connecting pipes 12 are finally welded into a single annular connecting pipe 1. Finally, the grouting pipe 2 and the grout delivery pipe 3 are correspondingly welded to the four-way connector 11. In this embodiment, the four-way connector 11 and the connecting pipe 12, the four-way connector 1... The pipes 1 and 2, 11 and 3 are connected by flanges. Flange rings are fixedly connected to the interface of the four-way connector 11, the end of the connecting pipe 12, the upper end of the grouting pipe 2, and the end of the grouting pipe 3. One end of the connecting pipe 12 is directly flanged to one interface of the first four-way connector 11, and the other end of the connecting pipe 12 is directly flanged to one interface of the second four-way connector 11, and so on, connecting the ends to form a whole ring-shaped connecting pipe 1. Finally, the corresponding flanges of the grouting pipe 2 and the grouting pipe 3 are connected to the other interfaces of the four-way connector 11.

[0019] In this embodiment, four sets of grouting pipes 2 are provided, and correspondingly, four sets of grout delivery pipes 3 and four-way connectors 11 are provided.

[0020] The lower end of the grouting pipe 2 is conical, and multiple grout outlet holes 21 are opened on the circumferential wall of the grouting pipe 2. The lower end of the grouting pipe 2 has a conical opening, which is the main grouting output port and can quickly fill deep voids. The grout outlet holes 21 expand the lateral diffusion range. The combination of the two ensures grouting efficiency and improves the uniformity of grout distribution, avoiding the problem of insufficient local grouting caused by a single grout outlet method.

[0021] The grouting pipe 2 is made of rigid material.

[0022] The grout delivery pipe 3 is equipped with a matching pipe plug 5. The pipe plug 5 is frustoconical in shape and made of rubber. A pull ring is fixedly connected to the pipe plug 5 so that the pipe plug 5 can be pulled out.

[0023] Implementation steps: Pre-embedded device: After the backfilling of cement soil on the back of the abutment reaches the design elevation, excavate 4 pre-sized pits 9. The number of pits 9 is the same as the number of grouting pipes 2 (4). Fill each pit 9 with clean crushed stone to form a crushed stone filling layer. Arrange the 4 rigid grouting pipes 2 in the pre-set positions (2 grouting pipes on the inner side and 2 on the outer side, and the grouting pipes 2 are arranged horizontally close to the center line of the abutment 8 and staggered between the inner and outer sides), so that the lower end of each grouting pipe 2 extends to the lower part of the crushed stone filling layer in the corresponding pit 9. Circumferential connecting pipe splicing: The four-way connector 11 is fixedly connected to the upper end of the grouting pipe 2. The four-way connector 11 and the connecting pipe 12 are assembled into a circumferential connecting pipe 1. If the length of a single connecting pipe 12 is insufficient, multiple connecting pipes 12 can be spliced ​​together to ensure that the circumferential connecting pipe 1 is compatible with the back of the platform. Then, the grouting pipe 3 is connected to the four-way connector 11. The grouting pipe 3 is led out of the platform 8 in the horizontal direction. The pipe opening of the grouting pipe 3 is sealed with a pipe plug 5. A double-layer waterproof geotextile 7 with a size larger than the opening of the pit 9 is cut and covered on the top of the pit 9. The edges of the geotextile are compacted with surrounding gravel to prevent the geotextile from shifting or debris from entering the pit 9. Grouting Treatment: When uneven settlement occurs on the back of the abutment and grouting is required, remove all pipe plugs 5, open the valve 4 of one grout delivery pipe 3, and close the valves 4 of the remaining three grout delivery pipes 3; start the grouting equipment and inject grout into the grout delivery pipe 3 with the valve 4 open. The initial grouting pressure is controlled within the preset low pressure range. If the grout does not sink, adjust the grouting pressure to the preset high pressure range; monitor the grout intake of the current grouting pipe 2 in real time. When the grout intake is less than the preset threshold, close the valve of the current grouting pipe and stop grouting in that pipe; repeat the above steps, opening the valves 4 of the remaining three grout delivery pipes 3 in sequence, and completing the grouting of each grouting pipe 2 one by one; when the grouting of the last grouting pipe 2 is about to end, open the valves 4 of the three grout delivery pipes 3 that have been grouted, and continue grouting into the last grouting pipe 2 until grout emerges from any grout delivery pipe 3 with the valve 4 open, then close the valve 4 of the last grouting pipe 3 to complete the grouting.

[0024] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the scope of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this utility model, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this utility model's implementation.

[0025] The present invention has been described above with reference to preferred embodiments, but the scope of protection of the present invention is not limited thereto. All technical solutions falling within the scope of the claims are within the scope of protection of the present invention. Various modifications can be made to the present invention, and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A grouting device for backfilling highway abutments, characterized in that: It includes a circumferential connecting pipe (1), multiple grouting pipes (2) fixedly connected to the circumferential connecting pipe (1), and a grout delivery pipe (3) corresponding to the grouting pipe (2). The grout delivery pipe (3) is connected to the upper end of the grouting pipe (2), and a switch valve (4) is provided on the grout delivery pipe (3).

2. The grouting device for highway abutment backfilling according to claim 1, characterized in that: The circumferential connecting pipe (1) includes multiple four-way connectors (11) and a connecting pipe (12) for connecting adjacent four-way connectors (11). The end of the connecting pipe (12) is detachably connected to the interface of the four-way connector (11). The end of the grouting pipe (2) is detachably connected to the four-way connector (11), and the end of the grouting pipe (3) is detachably connected to the four-way connector (11).

3. The grouting device for highway abutment backfilling according to claim 1, characterized in that: The lower end of the grouting pipe (2) is conical, and multiple grout outlet holes (21) are opened on the circumferential wall of the grouting pipe (2).

4. A grouting device for backfilling highway abutments according to any one of claims 1 to 3, characterized in that: The grouting pipe (2) is made of rigid material.

5. A grouting device for backfilling highway abutments according to any one of claims 1 to 3, characterized in that: The inlet of the grout delivery pipe (3) is fitted with a matching pipe plug (5).

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