Municipal road pipeline protection structure and construction method thereof

Abstract

The invention discloses a municipal road pipeline protection structure and a construction method thereof, and relates to the technical field of municipal engineering. Comprising a deep pit excavated in the municipal road pipeline laying position, a reinforced concrete cushion layer is laid at the bottom in the deep pit, a containing groove allowing pipelines to be placed in is formed in the upper surface of the reinforced concrete cushion layer, and lateral concrete walls are poured in the positions, located on the two sides of the reinforced concrete cushion layer, in the deep pit. First concrete supporting bottom beams are fixedly arranged on the upper surface of the reinforced concrete cushion layer and located on the two sides of the containing groove, and the first concrete supporting bottom beams extend in the pipeline laying direction; the arch-shaped encapsulating concrete layer is arranged above the pipeline in the placing groove in a crossing mode, and supporting legs at the two ends of the arch-shaped encapsulating concrete layer are fixed to the first concrete supporting bottom beams on the two sides of the placing groove correspondingly; and the buffering type arched concrete protection layer is arranged on the reinforced concrete cushion layer and located above the arched encapsulated concrete layer.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal engineering, and in particular to a municipal road pipeline protection structure and a construction method thereof. Background Art

[0002] Municipal road pipelines refer to the comprehensive pipe network system of various pipelines in the city, including water, gas, electricity, communications and other infrastructure. The municipal pipeline system is an important part of the city's public infrastructure and plays a vital role in the provision of basic services such as water supply, power supply, and gas supply. At the same time, municipal pipelines also include environmental sanitation systems such as garbage disposal and sewage treatment, which also play an important role. Generally speaking, they include tap water pipes, drainage pipes, gas pipes, power pipes, etc. The protection of these pipelines is crucial, not only related to the lives and work of residents, but also to the smooth progress of the entire road reconstruction project.

[0003] At present, the protection structure of municipal road pipelines is generally cast in the excavated deep pit, supported by the reinforced concrete cushion layer at the bottom, cast concrete walls on both sides, and encapsulated by the concrete layer on the top. After encapsulation, the soil is sealed and the urban road is built. Therefore, once a local fracture occurs in the urban road, the concrete layer encapsulating the pipeline will be directly stressed, deformed, or even collapsed, causing damage to the pipeline. In addition, the pipeline protection structure in the prior art is single and the rated stress level is not strong. It is impossible to preserve the safety of the pipeline after a local fracture occurs in the road, especially for pipelines laid under the road, including rainwater pipes, sewage pipes, and reclaimed water pipes. If a local collapse of the road occurs, the concrete layer and pipelines below will be continuously stressed during driving, and in severe cases, the road will collapse. In order to improve the above problems and enhance the protection strength of the pipelines under the road, it is urgent to design a municipal road pipeline protection structure and its construction method. Summary of the invention

[0004] The purpose of the present invention is to provide a municipal road pipeline protection structure and a construction method thereof in order to solve the above problems.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A municipal road pipeline protection structure of the present invention comprises a deep pit excavated at the location where the municipal road pipeline is laid, a reinforced concrete cushion layer is laid at the bottom of the deep pit, a placement groove for placing the pipeline is arranged on the upper surface of the reinforced concrete cushion layer, and side concrete walls are cast on both sides of the reinforced concrete cushion layer in the deep pit, and also comprises:

[0007] A first concrete support bottom beam, the first concrete support bottom beam is fixedly arranged on the upper surface of the reinforced concrete cushion layer and on both sides of the placement groove, and the first concrete support bottom beam is extended along the pipeline laying direction;

[0008] An arched encapsulating concrete layer is arranged across the pipeline in the placement groove, and the legs at both ends of the arched encapsulating concrete layer are respectively fixed to the first concrete supporting bottom beams on both sides of the placement groove;

[0009] A buffered arched concrete protective layer is arranged on the reinforced concrete cushion layer and is located above the arched encapsulated concrete layer. The buffered arched concrete protective layer includes two groups of symmetrically arranged semi-arched concrete protective layers. The two groups of symmetrically arranged semi-arched concrete protective layers are butt-jointed to form an arched structure. The lower ends of the two groups of semi-arched concrete protective layers are both provided with a second concrete support bottom beam, and the second concrete support bottom beam is located on the side of the first concrete support bottom beam opposite to the placement groove;

[0010] A rib plate, which is an arc-shaped plate structure arranged along the arched surface outside the semi-arched concrete protective layer, wherein two rib plates arranged in parallel with each other form a group to form a slideway, and multiple groups of rib plates are arranged on the arched surface of the semi-arched concrete protective layer;

[0011] A slider slides on the arched surface outside the semi-arched concrete protective layer, and one slider is arranged in the slideway formed by each group of ribs so that the slider moves along the slideway;

[0012] The bearing layer concrete is arranged in a herringbone shape above the buffer arched concrete protective layer, and two legs of the lower end of the bearing layer concrete are respectively fixed to the side concrete walls on both sides;

[0013] A concrete capping layer, wherein the concrete capping layer is arranged above the side concrete walls and the bearing layer concrete, the two sides of the concrete capping layer are supported by the tops of the side concrete walls, and the middle part of the concrete capping layer is supported by the top of the bearing layer concrete;

[0014] A top support structure is arranged between the middle position of the lower surface of the stress-bearing layer concrete and the two groups of symmetrical sliding blocks on the two groups of semi-arched concrete protective layers below; and

[0015] An arc-shaped elastic support plate is connected between each of the sliding blocks and the side concrete wall on the corresponding side, and the outer arc surface of the arc-shaped elastic support plate is arranged toward the side where the semi-arched concrete protective layer is located.

[0016] Furthermore, the cross-section of the first concrete support bottom beam is triangular, and the slope surface of the triangle is arranged on the side where the placement groove is located.

[0017] Furthermore, the thickness of the legs at both ends of the arched encapsulated concrete layer is greater than the thickness at the middle position, and the arched encapsulated concrete layer is an upper arched structure.

[0018] Furthermore, the butt joint end faces of the two symmetrically arranged groups of semi-arched concrete protective layers are both faces extending in an arc shape longitudinally so that the butt joint end faces of the two groups of semi-arched concrete protective layers can perform relative rolling motion.

[0019] Furthermore, the second concrete support bottom beam is placed on the upper surface of the reinforced concrete cushion layer and a buffer distance is left between the second concrete support bottom beam and the first concrete support bottom beam. Strip concrete limit blocks are arranged between the upper surface of the reinforced concrete cushion layer and the side concrete walls on both sides, and a buffer distance is left between the second concrete support bottom beam and the strip concrete limit blocks.

[0020] Furthermore, backfill soil is filled between the first concrete supporting bottom beam and the arch encapsulating concrete layer and the buffer type arch concrete protective layer, between the buffer type arch concrete protective layer and the stress-bearing layer concrete, and between the stress-bearing layer concrete and the concrete capping layer.

[0021] Furthermore, the lower surface of the concrete sealing layer is in a herringbone structure so that the thickness of the midline position of the concrete sealing layer is smaller than the thickness at both sides.

[0022] Furthermore, the top support structure includes a top upright and a support rod, the upper end of the top upright is connected to the midline position of the lower surface of the load-bearing layer concrete, and the lower end is symmetrically provided with two groups of support rods, the two groups of support rods are arranged one-to-one with the two groups of symmetrical sliding blocks on the two groups of semi-arch concrete protective layers, one end of the support rod is hingedly connected to the lower end of the top upright, and the other end is hingedly connected to the sliding block.

[0023] Furthermore, a road surface is paved above the concrete sealing layer.

[0024] A construction method of a municipal road pipeline protection structure, based on a municipal road pipeline protection structure, comprises the following steps:

[0025] Step 1: excavate the deep pit and lay the reinforced concrete cushion layer at the bottom thereof, cast the side concrete walls on both sides of the reinforced concrete cushion layer in the deep pit, and lay the pipeline in the placement groove;

[0026] Step 2: pouring the first concrete support bottom beam on both sides of the placement groove on the upper surface of the reinforced concrete cushion layer, and pouring the arched encapsulating concrete layer between the first concrete support bottom beams on both sides to encapsulate the pipeline;

[0027] Step 3: After completing step 2, backfill the soil on top of the arch encapsulating concrete layer and compact it, so as to place the prefabricated buffer arch concrete protective layer on top of the backfill soil, so that the upper ends of the two groups of semi-arch concrete protective layers in the buffer arch concrete protective layer are butted to form an arch structure;

[0028] Step 4: the buffer type arched concrete protective layer prefabricated in step 3 includes the rib plate and the slider, and the top support structure and the arc-shaped elastic support plate are respectively installed at both ends of the slider, and the soil is backfilled and compacted above the buffer type arched concrete protective layer, so as to pour concrete above the backfill soil to form the stress layer concrete;

[0029] Step 5: After step 4, backfill the soil on the stress-bearing layer concrete and compact it, so as to pour concrete on the backfill soil to form the concrete sealing layer;

[0030] Step 6: backfill the soil above the concrete capping layer, compact it, and lay the road surface above it.

[0031] In the above technical solution, the municipal road pipeline protection structure and the construction method thereof provided by the present invention have the following beneficial effects:

[0032] In the municipal road pipeline protection structure constructed by this construction method, the buffer arch concrete protective layer is used as the main protection structure above the pipeline, and the arch encapsulating concrete layer is used for auxiliary protection. The stress conditions above the buffer arch concrete protective layer are reasonably dispersed through structures such as the stress layer concrete, the concrete sealing top layer, the slider, and the top support structure. The buffer arch concrete protective layer has two deformation forms under two stress positions, so as to play a buffering role after the stress through deformation. However, the buffer arch concrete protective layer can maintain its arch protection structure after deformation, and still play a protective role for the pipeline. Moreover, its deformed arch protection structure still plays a supporting role for the road structure layer above, thereby avoiding serious road collapse and effectively protecting the municipal road pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0034] Figure 1 A schematic diagram of a municipal road pipeline protection structure provided by an embodiment of the present invention;

[0035] Figure 2A schematic diagram of the stress deformation of the middle part of the buffer-type arched concrete protective layer of a municipal road pipeline protection structure provided by an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of the stress deformation of the two sides of the buffer-type arched concrete protective layer of a municipal road pipeline protection structure provided by an embodiment of the present invention;

[0037] Figure 4 A top view of a semi-arched concrete protective layer of a municipal road pipeline protection structure provided by an embodiment of the present invention;

[0038] Figure 5 A construction flow chart of a construction method for a municipal road pipeline protection structure provided in an embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 1. Deep pit; 2. Reinforced concrete cushion layer; 3. Placement groove; 4. Lateral concrete wall; 5. First concrete support bottom beam; 6. Arched encapsulated concrete layer; 7. Semi-arched concrete protective layer; 8. Second concrete support bottom beam; 9. Ribs; 10. Slide block; 11. Load-bearing layer concrete; 12. Concrete sealing top layer; 13. Arc elastic support plate; 14. Strip concrete limit block; 15. Top vertical pole; 16. Support pole. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0042] See also Figure 1-5 A municipal road pipeline protection structure includes a deep pit 1 excavated at the municipal road pipeline laying position, a reinforced concrete cushion layer 2 is laid at the bottom of the deep pit 1, and a placement groove 3 for placing the pipeline is arranged on the upper surface of the reinforced concrete cushion layer 2. Side concrete walls 4 are cast on both sides of the reinforced concrete cushion layer 2 in the deep pit 1. The above is a conventional practice for laying municipal road pipelines, and only the bottom cushion layer structure and the protective main structure on both sides. The reinforced concrete cushion layer 2 and the side concrete wall 4 can be cast into an integrated structure to ensure its overall strength. The external part is supported by backfill soil, and also includes:

[0043] A first concrete support bottom beam 5 is fixedly arranged on the upper surface of the reinforced concrete cushion layer 2 and on both sides of the placement groove 3. The first concrete support bottom beam 5 is extended along the pipeline laying direction;

[0044] The arched encapsulated concrete layer 6 is arranged across the pipeline in the placement groove 3, and the legs at both ends of the arched encapsulated concrete layer 6 are respectively fixed on the first concrete support bottom beams 5 on both sides of the placement groove 3, that is, the first concrete support bottom beams 5 on both sides are the support structure below the arched encapsulated concrete layer 6 to support the arched encapsulated concrete layer 6 above the pipeline for protection. The arched structure has strong compressive resistance and can effectively protect the pipeline. The first concrete support bottom beam 5 can be integrally cast with the reinforced concrete cushion layer 2 to ensure the stability of the first concrete support bottom beam 5;

[0045] The buffer type arched concrete protective layer is arranged on the reinforced concrete cushion layer 2 and above the arched encapsulating concrete layer 6, which is equivalent to the upper protective structure of the arched encapsulating concrete layer 6 to form a double-layer protection for the pipeline. The buffer type arched concrete protective layer includes two groups of symmetrically arranged semi-arched concrete protective layers 7. The two groups of symmetrically arranged semi-arched concrete protective layers 7 are butt-jointed to form an arched structure. The lower ends of the two groups of semi-arched concrete protective layers 7 are both provided with a second concrete support bottom beam 8. The second concrete support bottom beam 8 is located on the side of the first concrete support bottom beam 5 opposite to the placement groove 3, that is, the outer side of the two groups of first concrete support bottom beams 5. The second concrete support bottom beam 8 can be integrally cast between the semi-arched concrete protective layer 7 and can be a prefabricated component prefabricated in the early stage. It can be directly laid and used during the construction process to improve the on-site construction efficiency. The upper ends of the two symmetrical groups of semi-arched concrete protective layers 7 are butt-jointed. The position is contact docking, and the lower end of a single semi-arched concrete protective layer 7 is movable on the upper surface of the reinforced concrete cushion layer 2. Because of the thickness setting of the docking position, when the middle position of the buffer arched concrete protective layer, that is, the docking position, is subjected to force, the lower ends of the two groups of semi-arched concrete protective layers 7 move to both sides, but the upper end docking position still remains in contact with each other, and the arched structure is still used to form support and protection. If the buffer arched concrete protective layer is subjected to force on both sides and moves inward, at this time, the two groups of first concrete support bottom beams 5 are limit structures for limiting the moving distance of the second concrete support bottom beam 8 to avoid excessive movement and loss of the arched structure. The upper end docking positions of the two groups of semi-arched concrete protective layers 7 also remain in contact with each other, and the arched structure is still used to form support and protection. At the same time, during the deformation process of the buffer arched concrete protective layer, it also plays a buffering role against the force, thereby preventing the pipeline below from being damaged or the road above from collapsing seriously.

[0046] The rib plate 9 is an arc plate structure arranged along the arched surface of the outer side of the semi-arched concrete protective layer 7. Two rib plates 9 arranged in parallel with each other form a group to form a slideway, and multiple groups of rib plates 9 are arranged on the arched surface of the semi-arched concrete protective layer 7. The rib plates 9 not only have the function of forming the slideway, but also can strengthen the arched structure of the semi-arched concrete protective layer 7 to prevent the semi-arched concrete protective layer 7 from being broken under pressure;

[0047] The slider 10 slides on the arched surface outside the semi-arched concrete protective layer 7. A slider 10 is arranged in the slideway formed by each set of ribs 9 so that the slider 10 moves along the slideway, thereby guiding the movement of the slider 10.

[0048] The stress-bearing layer concrete 11 is arranged in a herringbone shape above the buffer-type arched concrete protective layer. The two legs of the lower end of the stress-bearing layer concrete 11 are respectively fixed on the side concrete walls 4 on both sides. First, the herringbone structure of the stress-bearing layer concrete 11 is equivalent to a triangular support structure, which has strong support stability. At the same time, when the stress is too large to cause deformation, fracture, or collapse, it will also cause stress on the two sides, or the middle part, or the entire structure of the buffer-type arched concrete protective layer below, and then the buffer-type arched concrete protective layer can respond to various stress forms in different deformation forms;

[0049] Concrete capping layer 12, the concrete capping layer 12 is arranged above the side concrete wall 4 and the bearing layer concrete 11, the two sides of the concrete capping layer 12 are supported by the top of the side concrete wall 4, and the middle part of the concrete capping layer 12 is supported by the top of the bearing layer concrete 11, and the whole can withstand strong pressure. After breaking, the bearing layer concrete 11 will bear the pressure first, and the top of the concrete capping layer 12 is the sealing soil layer and the paved road;

[0050] A top support structure is arranged between the middle position of the lower surface of the stress-bearing layer concrete 11 and two symmetrical groups of sliding blocks 10 on the two groups of semi-arched concrete protective layers 7 below; and

[0051] An arc-shaped elastic support plate 13 is connected between each slider 10 and the side concrete wall 4 on the corresponding side, and the outer arc surface of the arc-shaped elastic support plate 13 is arranged toward the side where the semi-arched concrete protective layer 7 is located.

[0052] Specifically, the top support structure and the arc-shaped elastic support plate 13 are structures respectively supported at both ends of the slider 10 to stably support the slider 10 in one position. After the stress-bearing layer concrete 11 is deformed, the force is transmitted to the slider 10 through the top support structure and moves downward. At this time, the arc-shaped elastic support plate 13 is pressed to deform the arc-shaped elastic support plate 13, and the deformation direction is toward the lower end of the semi-arched concrete protective layer 7, so that the lower end of the semi-arched concrete protective layer 7 is subjected to extrusion pressure. If the stress-bearing layer concrete 11 is deformed, the force is applied to the middle position of the buffer-type arched concrete protective layer. At this time, the pressure of the arc-shaped elastic support plate 13 is balanced to balance the force, so that the buffer-type arched concrete protective layer structure remains stable.

[0053] Furthermore, the cross-section of the first concrete supporting bottom beam 5 is triangular and the triangular slope surface is arranged on the side where the placement groove 3 is located. With the triangular structure, its slope surface can better cooperate with the arched encapsulated concrete layer 6 for support, so that the structure of the arched encapsulated concrete layer 6 is more stable and can more stably withstand the pressure transmitted by the second concrete supporting bottom beam 8 on the outside.

[0054] Furthermore, the thickness of the legs at both ends of the arched encapsulated concrete layer 6 is greater than the thickness in the middle, so that the arched strength of the arched encapsulated concrete layer 6 is better, and the arched encapsulated concrete layer 6 is an upper arched structure.

[0055] Furthermore, the butt joint end faces of the two symmetrically arranged groups of semi-arched concrete protective layers 7 are both longitudinally arc-shaped extending faces so that the butt joint end faces of the two groups of semi-arched concrete protective layers 7 can perform relative rolling motion. Specifically, when the second concrete support bottom beam 8 moves laterally on the reinforced concrete cushion layer 2 to tilt the semi-arched concrete protective layers 7, the positions where the semi-arched concrete protective layers 7 abut against each other are equivalent to rolling fit because they are arc-shaped structures, so as to always maintain a good abutting state, thereby more stably maintaining the arched structure for protection.

[0056] Furthermore, the second concrete support bottom beam 8 is placed on the upper surface of the reinforced concrete cushion layer 2 and a buffer distance is left between it and the first concrete support bottom beam 5. Strip concrete limit blocks 14 are arranged between the upper surface of the reinforced concrete cushion layer 2 and the side concrete walls 4 on both sides. A buffer distance is left between the second concrete support bottom beam 8 and the strip concrete limit blocks 14, which is equivalent to the first concrete support bottom beam 5 and the strip concrete limit blocks 14 on both sides of the second concrete support bottom beam 8, respectively, so as to limit the moving distance of the second concrete support bottom beam 8, so as to avoid the second concrete support bottom beam 8 moving too long, resulting in the overall collapse of the buffer-type arched concrete protective layer and the loss of the arched structure. Moreover, because of the thickness of the top end and the curved surface structure of the semi-arched concrete protective layer 7, combined with the limitation of the moving distance of the second concrete support bottom beam 8, even if a group of semi-arched concrete protective layers 7 on one side is displaced or deflected, the butt joint between the two groups of semi-arched concrete protective layers 7 cannot lose the abutment support.

[0057] Furthermore, backfill soil is filled between the first concrete supporting bottom beam 5 and the arch encapsulating concrete layer 6 and the buffering arch concrete protective layer, between the buffering arch concrete protective layer and the load-bearing layer concrete 11, and between the load-bearing layer concrete 11 and the concrete capping layer 12 to ensure the stability of the position of the semi-arch concrete protective layer 7 when it is not under stress, and also has a buffering effect, so that the pipeline protection structure remains stable as a whole.

[0058] Furthermore, the lower surface of the concrete capping layer 12 is in a herringbone structure so that the thickness of the midline position of the concrete capping layer 12 is smaller than the thickness at the two sides. Under this structure, the overall stress strength of the concrete capping layer 12 is stronger, avoiding fracture.

[0059] Furthermore, the top support structure includes a top upright 15 and a support rod 16. The upper end of the top upright 15 is connected to the midline position of the lower surface of the load-bearing layer concrete 11, and two groups of support rods 16 are symmetrically arranged at the lower end. The two groups of support rods 16 are arranged one-to-one with the two groups of symmetrical sliders 10 on the two groups of semi-arch concrete protective layers 7. One end of the support rod 16 is hinged to the lower end of the top upright 15, and the other end is hinged to the slider 10. After the load-bearing layer concrete 11 is deformed under force, the force is transmitted to the support rod 16 through the top upright 15 and then to the respective sliders 10 to move the sliders 10.

[0060] Furthermore, a road surface is laid above the concrete capping layer 12 .

[0061] A construction method of a municipal road pipeline protection structure, based on a municipal road pipeline protection structure, comprises the following steps:

[0062] Step 1: excavate a deep pit 1 and lay a reinforced concrete cushion layer 2 at the bottom thereof, cast side concrete walls 4 on both sides of the reinforced concrete cushion layer 2 in the deep pit 1, lay the pipeline in the placement groove 3, and the placement groove 3 supports the pipeline so that the pipeline laying position is stable and the force is evenly distributed;

[0063] Step 2: Cast the first concrete support bottom beam 5 on both sides of the placement groove 3 on the upper surface of the reinforced concrete cushion layer 2, and cast the arched encapsulation concrete layer 6 between the first concrete support bottom beams 5 on both sides to encapsulate the pipeline. This structure is the first layer of protection structure for the pipeline;

[0064] Step 3: After completing step 2, backfill the soil on the arch encapsulated concrete layer 6 and compact it, so as to place a prefabricated buffer arch concrete protective layer on the backfill soil, so that the upper ends of the two groups of semi-arch concrete protective layers 7 in the buffer arch concrete protective layer are butted to form an arch structure. The semi-arch concrete protective layer 7 can be a prefabricated component prefabricated in the early stage, which can be directly laid and used during the construction process to improve the on-site construction efficiency;

[0065] Step 4: The buffered arched concrete protective layer prefabricated in step 3 includes ribs 9 and sliders 10. The ribs 9 can be prefabricated by integrally casting with the semi-arched concrete protective layer 7 to save on-site construction efficiency. A top support structure and an arc-shaped elastic support plate 13 are respectively installed at both ends of the slider 10. The earth is backfilled and compacted above the buffered arched concrete protective layer, and concrete is poured above the backfilled soil to form a stress-bearing layer concrete 11.

[0066] Step 5: After step 4, backfill the soil on the stress-bearing layer concrete 11 and compact it, so as to pour concrete on the backfill soil to form a concrete capping layer 12;

[0067] Step 6: Backfill the earth above the concrete capping layer 12 and compact it, and then lay the road surface thereon.

[0068] To sum up, in the municipal road pipeline protection structure constructed by this construction method, the buffer arch concrete protective layer is used as the main protection structure above the pipeline, and the arch encapsulated concrete layer is used for auxiliary protection. The stress conditions above the buffer arch concrete protective layer are reasonably dispersed through structures such as the stress layer concrete, the concrete capping layer, the slider, and the top support structure. The buffer arch concrete protective layer has two deformation forms under two stress positions, so as to play a buffering role after the stress through deformation. However, the buffer arch concrete protective layer can maintain its arch protection structure after deformation, and still play a protective role for the pipeline. Moreover, its deformed arch protection structure still plays a supporting role for the road structure layer above, thereby avoiding serious road collapse and effectively protecting the municipal road pipeline.

[0069] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A municipal road pipeline protection structure, comprising a deep pit (1) excavated at the location where the municipal road pipeline is laid, a reinforced concrete cushion layer (2) is laid at the bottom of the deep pit (1), a placement groove (3) for placing the pipeline is arranged on the upper surface of the reinforced concrete cushion layer (2), and side concrete walls (4) are cast on both sides of the reinforced concrete cushion layer (2) in the deep pit (1), characterized in that: Also includes: A first concrete support bottom beam (5), the first concrete support bottom beam (5) being fixedly arranged on the upper surface of the reinforced concrete cushion layer (2) and on both sides of the placement groove (3), and the first concrete support bottom beam (5) extending along the pipeline laying direction; An arched encapsulating concrete layer (6) is arranged across the pipeline in the placement groove (3), and the legs at both ends of the arched encapsulating concrete layer (6) are respectively fixed to the first concrete supporting bottom beam (5) on both sides of the placement groove (3); A buffered arched concrete protective layer, which is arranged on the reinforced concrete cushion layer (2) and is located above the arched encapsulating concrete layer (6), the buffered arched concrete protective layer comprising two groups of symmetrically arranged semi-arched concrete protective layers (7), the two groups of symmetrically arranged semi-arched concrete protective layers (7) being butt-jointed to form an arched structure, the lower ends of the two groups of semi-arched concrete protective layers (7) are both provided with a second concrete support bottom beam (8), the second concrete support bottom beam (8) being located on a side of the first concrete support bottom beam (5) opposite to the placement groove (3); A rib plate (9) is an arc-shaped plate structure arranged along the arched surface outside the semi-arched concrete protective layer (7), two rib plates (9) arranged parallel to each other are used as a group to form a slideway, and a plurality of groups of rib plates (9) are arranged on the arched surface of the semi-arched concrete protective layer (7); A slider (10) slides on the arched surface outside the semi-arched concrete protective layer (7), and one slider (10) is arranged in the slideway formed by each group of ribs (9) so that the slider (10) moves along the slideway; The stress-bearing layer concrete (11) is arranged in a herringbone shape above the buffer-type arched concrete protective layer, and two legs at the lower end of the stress-bearing layer concrete (11) are respectively fixed to the side concrete walls (4) on both sides; A concrete capping layer (12), wherein the concrete capping layer (12) is arranged above the side concrete walls (4) and the stress-bearing layer concrete (11), the two sides of the concrete capping layer (12) are supported by the tops of the side concrete walls (4), and the middle part of the concrete capping layer (12) is supported by the top of the stress-bearing layer concrete (11); A supporting structure, which is arranged between the middle position of the lower surface of the stress-bearing layer concrete (11) and the two groups of symmetrical sliding blocks (10) on the two groups of semi-arched concrete protective layers (7) below; and An arc-shaped elastic support plate (13), wherein the arc-shaped elastic support plate (13) is connected between each of the sliding blocks (10) and the side concrete wall (4) on the corresponding side, and the outer arc surface of the arc-shaped elastic support plate (13) is arranged toward the side where the semi-arched concrete protective layer (7) is located.

2. A municipal road pipeline protection structure according to claim 1, characterized in that: The first concrete support bottom beam (5) has a triangular cross-section, and the triangular slope surface is arranged on the side where the placement groove (3) is located.

3. A municipal road pipeline protection structure according to claim 1, characterized in that: The thickness of the legs at both ends of the arched encapsulating concrete layer (6) is greater than the thickness at the middle position, and the arched encapsulating concrete layer (6) is an upper arched structure.

4. A municipal road pipeline protection structure according to claim 1, characterized in that: The butt joint end faces of the two groups of symmetrically arranged semi-arched concrete protective layers (7) are both faces extending in an arc shape in the longitudinal direction so that the butt joint end faces of the two groups of semi-arched concrete protective layers (7) can perform relative rolling motion.

5. A municipal road pipeline protection structure according to claim 1, characterized in that: The second concrete support bottom beam (8) is placed on the upper surface of the reinforced concrete cushion layer (2) and a buffer distance is left between the second concrete support bottom beam (8) and the first concrete support bottom beam (5); strip concrete limit blocks (14) are provided between the upper surface of the reinforced concrete cushion layer (2) and the side concrete walls (4) on both sides; a buffer distance is left between the second concrete support bottom beam (8) and the strip concrete limit blocks (14).

6. A municipal road pipeline protection structure according to claim 1, characterized in that: Backfill soil is filled between the first concrete support bottom beam (5), the arch encapsulating concrete layer (6) and the buffer arch concrete protective layer, between the buffer arch concrete protective layer and the load-bearing layer concrete (11), and between the load-bearing layer concrete (11) and the concrete sealing top layer (12).

7. A municipal road pipeline protection structure according to claim 1, characterized in that: The lower surface of the concrete sealing layer (12) is in a herringbone structure so that the thickness of the midline position of the concrete sealing layer (12) is smaller than the thickness of the two side positions.

8. A municipal road pipeline protection structure according to claim 1, characterized in that: The top support structure comprises a top vertical rod (15) and a support rod (16); the upper end of the top vertical rod (15) is connected to the midline position of the lower surface of the load-bearing layer concrete (11); and the lower end is symmetrically provided with two groups of the support rods (16); the two groups of the support rods (16) are arranged in a one-to-one correspondence with the two groups of the symmetrical sliding blocks (10) on the two groups of the semi-arched concrete protective layers (7); one end of the support rod (16) is hingedly connected to the lower end of the top vertical rod (15), and the other end is hingedly connected to the sliding block (10).

9. A municipal road pipeline protection structure according to claim 1, characterized in that: A road surface is paved above the concrete sealing layer (12).

10. A construction method of a municipal road pipeline protection structure, based on a municipal road pipeline protection structure according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: excavate the deep pit (1) and lay the reinforced concrete cushion layer (2) on the bottom thereof, cast the side concrete walls (4) on both sides of the reinforced concrete cushion layer (2) in the deep pit (1), and lay the pipeline in the placement groove (3); Step 2: Casting the first concrete support bottom beam (5) on both sides of the placement groove (3) on the upper surface of the reinforced concrete cushion layer (2), and casting the arched encapsulating concrete layer (6) between the first concrete support bottom beams (5) on both sides to encapsulate the pipeline; Step 3: after completing step 2, backfill the soil on top of the arch encapsulating concrete layer (6) and compact it, so as to place the prefabricated buffer arch concrete protective layer on top of the backfill soil, so that the upper ends of the two groups of semi-arch concrete protective layers (7) in the buffer arch concrete protective layer are butted together to form an arch structure; Step 4: the buffer type arched concrete protective layer prefabricated in step 3 includes the rib plate (9) and the slider (10), and the top support structure and the arc-shaped elastic support plate (13) are respectively installed at both ends of the slider (10), and the soil is backfilled and compacted above the buffer type arched concrete protective layer, so as to pour concrete above the backfilled soil to form the stress-bearing layer concrete (11); Step 5: after step 4, backfill the soil on top of the stress-bearing layer concrete (11) and compact it, so as to pour concrete on the backfill soil to form the concrete sealing top layer (12); Step six: backfill the soil on top of the concrete sealing layer (12), compact it, and lay the road surface on top of it.

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