Grouting reinforcement structure for composite pavement of expressway tunnel

Abstract

The utility model discloses a highway tunnel composite pavement grouting reinforcement structure which comprises a steel pipe pile driven into a stratum from a highway tunnel composite pavement, the steel pipe pile is composed of a detachable pipe section and a deeply-buried reinforcement section which are movably connected, and the lower end of the deeply-buried reinforcement section is closed. Grouting holes are distributed in the side wall of the deep-buried reinforcing section, concrete grout is poured into the deep-buried reinforcing section and the stratum on the periphery of the deep-buried reinforcing section, a lifting ring is arranged on the detachable pipe section, and a backfill layer of the road tunnel composite pavement is arranged on the upper side of the deep-buried reinforcing section with the detachable pipe section removed. Under the condition that the pavement structure is not damaged on a large scale, the pavement disease can be quickly treated.

Description

Technical Field

[0001] The utility model relates to a grouting reinforcement structure for a composite pavement of a highway tunnel, and belongs to the technical field of the repair of the composite pavement of the highway tunnel. Background Art

[0002] Tunnel engineering occupies an important position in modern transportation infrastructure, and its safety and stability are directly related to the lives and property safety of the people and the smooth operation of traffic.

[0003] However, with the passage of time and the influence of the natural environment, tunnel structures often show varying degrees of damage and diseases, such as cracks, water seepage, deformation, etc. These problems not only threaten the safety of the tunnel itself, but also pose potential risks to passing vehicles and personnel.

[0004] The pavement diseases of tunnel engineering refer to a series of adverse phenomena that occur during the operation of the tunnel, resulting in the decline of the structural performance of the tunnel pavement and the impairment of its service function due to natural factors (such as groundwater erosion, temperature change), design defects, construction quality problems, or the long-term action of heavy traffic loads.

[0005] The pavement diseases of tunnel engineering have a profound impact on tunnel operation. First of all, it directly reduces the traffic capacity and service level of the tunnel, affecting traffic fluency and safety. Secondly, the aggravation of diseases will accelerate the overall damage of the tunnel structure, shorten the service life of the tunnel, and increase the maintenance cost and difficulty. In addition, the water seepage disease may also cause electrical equipment failures, affecting the normal operation of systems such as lighting and ventilation, and threatening the safety of personnel in the tunnel. The specific manifestations of tunnel pavement diseases are diverse. Crack diseases are the most common form. Transverse cracks are mostly caused by temperature stress or uneven settlement of the foundation, while longitudinal cracks are mostly related to improper treatment of construction joints or changes in geological conditions. Deformation diseases such as ruts and settlements will seriously affect the driving smoothness and safety. Pothole diseases not only reduce the pavement flatness, but also easily cause vehicle bumps and safety hazards. Water seepage diseases may accelerate the deterioration of structural materials and affect the internal environment of the tunnel. For crack diseases, deformation diseases and pothole diseases of tunnel pavement, the usual treatment plan is to remove the original composite pavement structure (including the surface layer, road slab and base structure), and then carry out treatment by replacing the tunnel invert, grouting reinforcement with steel pipe piles or adding an invert, etc. For the plan of using steel pipe pile grouting, its biggest disadvantage is that it is necessary to remove the pavement surface layer structure and then carry out steel pipe pile grouting reinforcement.

[0006] That is, how to carry out steel pipe pile grouting reinforcement without removing the pavement structure has become a problem to be solved. Summary of the Utility Model

[0007] In view of this, the purpose of the present utility model is to provide a grouting reinforcement structure for a composite pavement in a highway tunnel, which can quickly treat pavement diseases without large-scale damage to the pavement structure and can overcome the deficiencies of the prior art.

[0008] The purpose of the present utility model is achieved through the following technical solutions:

[0009] The present utility model discloses a grouting reinforcement structure for a composite pavement in a highway tunnel, which includes steel pipe piles driven into the ground layer from the composite pavement of the highway tunnel. The steel pipe piles are composed of detachable pipe sections and deep-buried reinforcement sections connected movably. The lower end of the deep-buried reinforcement section is closed, and grouting holes are distributed on the side wall of the deep-buried reinforcement section. Concrete slurry is poured in the deep-buried reinforcement section and the ground layer around the deep-buried reinforcement section. A lifting ring is provided on the detachable pipe section, and a backfill layer of the composite pavement of the highway tunnel is provided on the upper side of the deep-buried reinforcement section after removing the detachable pipe section.

[0010] As described above, screw threads are provided on both the detachable pipe section 4 and the deep-buried reinforcement section 5, and the detachable pipe section and the deep-buried reinforcement section are connected by screw threads.

[0011] As mentioned above, the composite pavement of the highway tunnel is composed of an upper asphalt layer, a middle C road panel, and a lower C base layer.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. The present utility model drives the steel pipe piles into the ground, and then grouts. The injected concrete slurry enters the cracks or cavities in the ground layer through the grouting holes to achieve solidification and compaction. After the grouting is completed, the detachable pipe section is disassembled, and then the holes after disassembly are repaired and reinforced with asphalt to realize the rapid opening to traffic of the tunnel. At the same time, the deep-buried reinforcement section can act as a support framework and can further improve the reinforcement effect. Through such a reinforcement method, pavement diseases can be quickly treated without large-scale damage to the pavement structure.

[0014] 2. Screw threads are provided on both the detachable pipe section and the deep-buried reinforcement section, and the detachable pipe section and the deep-buried reinforcement section are connected by screw threads, so that the connection between the detachable pipe section and the deep-buried reinforcement section is facilitated through the screw threads.

[0015] Other advantages, objectives, and features of the present utility model will be described to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the following description. Description of the Drawings

[0016] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings, where:

[0017] Figure 1 It is a schematic diagram of the connection structure of the present utility model.

[0018] Figure 2 It is a schematic diagram of the connection structure of the steel pipe pile of the present utility model.

[0019] Figure 3 It is a schematic diagram of the connection structure of the detachable pipe section of the steel pipe pile of the present utility model.

[0020] Figure 4 It is a schematic diagram of the connection structure of the deep-buried reinforcement section of the steel pipe pile of the present utility model.

[0021] Among them, the composite pavement of the highway tunnel 1; the stratum 2; the steel pipe pile 3; the detachable pipe section 4; the deep-buried reinforcement section 5; the grouting hole 6; the lifting ring 7; the screw thread 8; the asphalt layer 9; the C40 road surface slab 10; the C20 base layer 11. Specific embodiments

[0022] The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments are only for illustrating the present utility model and not for limiting the protection scope of the present utility model.

[0023] As Figure 1 -shown in the figure, a grouting reinforcement structure for a composite pavement of a highway tunnel disclosed by the present utility model includes a steel pipe pile 3 driven into the stratum 2 by the composite pavement 1 of the highway tunnel. The composite pavement 1 of the highway tunnel is composed of an upper asphalt layer 9, a middle C40 road surface slab 10 and a lower C20 base layer 11; the steel pipe pile 3 is composed of a detachable pipe section 4 and a deep-buried reinforcement section 5 which are movably connected. The lower end of the deep-buried reinforcement section 5 is closed, and grouting holes 6 are distributed on the side wall of the deep-buried reinforcement section 5. Concrete slurry is poured in the deep-buried reinforcement section 5 and the stratum 2 around the deep-buried reinforcement section 5. A lifting ring 7 is provided on the detachable pipe section 4, and a backfill layer of the composite pavement 1 of the highway tunnel is provided on the upper side of the deep-buried reinforcement section 5 from which the detachable pipe section 4 is removed. With such a structure, in use, the steel pipe pile 3 is driven into the ground 1, and then grouting is carried out. The injected concrete slurry enters the cracks or cavities in the stratum 2 through the grouting holes 6 to achieve solidification and compaction; when the grouting is completed, the detachable pipe section 4 is disassembled, and then the holes after disassembly are repaired and reinforced with asphalt to realize the rapid opening of the tunnel to traffic. At the same time, the deep-buried reinforcement section 5 can act as a support framework and can further improve the reinforcement effect. Through such a reinforcement method, the pavement diseases can be quickly treated under the condition of not damaging the pavement structure on a large scale.

[0024] Furthermore, screw threads 8 are provided on both the detachable pipe section 4 and the deep-buried reinforcement section 5, and the detachable pipe section 4 and the deep-buried reinforcement section 5 are connected through the screw threads 8, so that the connection between the detachable pipe section 4 and the deep-buried reinforcement section 5 can be facilitated through the screw threads 8.

[0025] During use, the detachable pipe section 4 of the new steel pipe pile 3 is completely driven into the C40 road surface slab 10. Then grouting reinforcement is carried out, and the grout flows into the formation to be reinforced through the grouting holes 6 of the deep-buried reinforcement section 5. After the steel pipe pile grouting construction is completed, a small machine or manual labor is used to remove the detachable pipe section 4 by using the lifting ring 7 at the upper part of the steel pipe pile. After the removal of the detachable pipe section 4 is completed, the asphalt layer 9 at the punching position is quickly repaired and reinforced to achieve the rapid opening of the tunnel to traffic.

[0026] The above are only the preferred embodiments of the present invention, and do not impose any form of confidentiality restrictions on the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical content of the present invention and according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A grouting reinforcement structure for a composite pavement of a highway tunnel, which comprises steel pipe piles (3) driven into a formation (2) by a composite pavement (1) of a highway tunnel, and is characterized in that: The steel pipe pile (3) is composed of a detachable pipe section (4) and a deep-buried reinforcement section (5) that are movably connected. The lower end of the deep-buried reinforcement section (5) is closed, and grouting holes (6) are distributed on the side wall of the deep-buried reinforcement section (5). Concrete slurry is poured in the deep-buried reinforcement section (5) and the formation (2) around the deep-buried reinforcement section (5). A lifting ring (7) is provided on the detachable pipe section (4), and a backfill layer of the composite pavement (1) of the highway tunnel is provided on the upper side of the deep-buried reinforcement section (5) after removing the detachable pipe section (4).

2. The grouting reinforcement structure for the composite pavement of the highway tunnel according to claim 1, characterized in that Threaded fasteners (8) are provided on both the detachable pipe section (4) and the deep-buried reinforcement section (5), and the detachable pipe section (4) and the deep-buried reinforcement section (5) are connected by the threaded fasteners (8).

3. The grouting reinforcement structure for the composite pavement of the highway tunnel according to claim 1, characterized in that, The composite pavement (1) of the highway tunnel is composed of an upper asphalt layer (9), a middle C40 road slab (10), and a lower C20 base layer (11).

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