Rain and sewage diversion pipeline transformation structure and construction method thereof

Abstract

The invention relates to the technical field of constructional engineering, in particular to a rainwater and sewage diversion pipeline transformation structure and a construction method thereof.The ground structure comprises a soil base layer and a first concrete structure layer arranged on the soil base layer, and a groove is formed in the ground structure; the rainwater and sewage diversion pipeline transformation structure is arranged in the groove and sequentially comprises a cushion layer, a rainwater pipeline, a backfill body, a second concrete structure layer and a waterproof assembly from bottom to top. The second concrete structure layer is flush with the first concrete structure layer; the waterproof assembly is embedded in the first concrete structure layer and the second concrete structure layer and covers a splicing seam between the first concrete structure layer and the second concrete structure layer. In the application, the waterproof assembly prevents surface water from permeating into the backfill body and the soil base layer, the risk of differential settlement of the backfill body and the second concrete structure layer is reduced, and the flatness of the ground is maintained, so that people can go out conveniently.

Description

Technical Field

[0001] The present application relates to the field of construction engineering technology, and in particular to a rainwater and sewage diversion pipeline reconstruction structure and a construction method thereof. Background Art

[0002] As the old urban areas of the city were built a long time ago, most of the residential areas, industrial and commercial areas, and urban villages use combined sewer pipes, that is, sewage and rainwater are transported in the same pipe and connected to the municipal sewage pipe system or municipal rainwater pipe system. When rainwater and sewage are mixed and discharged, if the drainage pipe is connected to the municipal rainwater pipe system, the urban water body will be polluted by sewage and form black and smelly water bodies; and connecting the drainage pipe to the municipal sewage pipe system will greatly increase the burden on the sewage treatment plant.

[0003] Rainwater and sewage separation is a drainage system that separates rainwater and sewage, and transports them through separate pipes for discharge or subsequent treatment. Rainwater is connected to the municipal rainwater pipe system through the rainwater pipe network and discharged into urban water bodies such as rivers and lakes; while sewage is connected to the municipal sewage pipe system through the sewage pipe network and transported to the sewage treatment plant for treatment.

[0004] Therefore, transforming the old city's "combined sewer system" into a "separate sewer system" has great economic and social benefits. It can improve the water quality of urban water bodies, reduce the burden on sewage treatment plants, improve residents' living standards and improve the urban environment.

[0005] In the process of rainwater and sewage separation pipeline reconstruction, the existing combined sewer pipe can be used as a sewage pipe and connected to the municipal sewage pipe system; and a new rainwater pipe can be built and connected to the municipal rainwater pipe system. This reconstruction plan makes full use of the existing combined sewer pipe and uses it as a subsequent sewage pipe, which shortens the construction period and reduces the project investment.

[0006] When laying new rainwater pipes, workers need to chisel away the old concrete on the ground surface and dig a trench in the soil layer; then, the workers install the pipes in the trench and fill the trench with backfill (such as sand, soil, etc.); finally, the workers pour new concrete on top of the backfill and make the new and old concrete surfaces on the same level.

[0007] However, after the rainwater and sewage diversion pipeline is put into use, the newly poured concrete above the rainwater pipe will sink due to the settlement of the backfill body itself and other reasons, making the ground uneven and affecting people's travel. Summary of the invention

[0008] After the rainwater diversion pipeline is reconstructed, in order to reduce the uneven settlement of the ground above the rainwater pipe and improve the flatness of the ground, the present application provides a rainwater and sewage diversion pipeline reconstruction structure and a construction method thereof.

[0009] The present application provides a rainwater-sewage separation pipeline reconstruction structure and a construction method thereof, which adopts the following technical solutions: A rainwater-sewage diversion pipeline reconstruction structure, the ground structure includes a soil base, a first concrete structure layer arranged on the soil base, and the ground structure is provided with a groove; the rainwater-sewage diversion pipeline reconstruction structure is arranged in the groove, the rainwater-sewage diversion pipeline reconstruction structure includes a cushion layer, a rainwater pipe, a backfill body, a second concrete structure layer and a waterproof component; the cushion layer is laid on the bottom wall of the groove, the rainwater pipe is laid on the cushion layer, the backfill body is laid on the side of the rainwater pipe away from the cushion layer, the second concrete structure layer is laid on the backfill body, and the second concrete structure layer is arranged flush with the first concrete structure layer; the waterproof component is buried in the first concrete structure layer and the second concrete structure layer, and the waterproof component is arranged in a through groove in the groove, the first concrete structure layer is provided with a first installation groove for accommodating the waterproof component, the second concrete structure layer is provided with a second installation groove for accommodating the waterproof component, and the waterproof component covers the joint between the first concrete structure layer and the second concrete structure layer.

[0010] By adopting the above technical solution, by burying the waterproof component between the first concrete structure layer and the second concrete structure layer, the waterproof component blocks the surface water (such as rainwater) from penetrating into the backfill body and the soil base through the joint between the first concrete structure layer and the second concrete structure. That is, by setting the waterproof component, the erosion of the backfill body by the surface water is weakened, the risk of uneven settlement of the backfill body and the second concrete structure layer is reduced, and the flatness of the ground is maintained, so that people can travel easily.

[0011] Optionally, the waterproof component includes a water-stopping steel plate and a water-swelling rubber plate, the water-stopping steel plate is horizontally arranged, and two water-swelling rubber plates are provided, and the two water-swelling rubber plates are bonded to both sides of the water-stopping steel plate. After expansion, the water-swelling rubber plates abut against the side walls of the first mounting groove and the second mounting groove.

[0012] By adopting the above technical scheme, the waterstop steel plate has good water-blocking performance, thereby effectively preventing surface water from penetrating along the gap between the first concrete structure layer and the second concrete structure layer; and the water-swellable rubber plate will swell when it comes into contact with water, thereby reducing the generation of gaps between the waterproof component and the first concrete structure layer and the second concrete structure layer, so as to further improve the waterproof performance of the structure.

[0013] Optionally, the waterstop steel plate includes a straight portion and a wavy portion, the straight portion is arranged in the first mounting groove, and the wavy portion is arranged in the second mounting groove.

[0014] By adopting the above technical solution, the straight portion facilitates the insertion of the waterproof component into the first installation groove, and the wavy portion can further block the ground surface from penetrating into the backfill body, so as to reduce the settlement of the backfill body.

[0015] Optionally, a first guide surface is provided on the side of the first concrete structure layer close to the second concrete structure layer, and the first guide surface is set at an acute angle to the horizontal plane; a second guide surface is provided on the side of the second concrete structure layer close to the first concrete structure layer, and the second guide surface is in contact with the first guide surface.

[0016] By adopting the above technical solution, the second guide surface cooperates with the first guide surface, and the second concrete structure layer transmits the external force to the first concrete body and the soil base layer in turn; so as to reduce the force on the backfill body at the bottom of the second concrete structure layer, reduce the compression deformation of the backfill body, reduce the risk of cracking and uneven settlement of the second concrete structure layer, and improve the flatness of the ground.

[0017] Optionally, it also includes a plurality of support piles, which are arranged on both sides of the groove along the width direction of the groove, and the soil base layers on both sides of the groove are provided with fixed grooves, and the fixed grooves are used to accommodate the support piles. The angle between the support piles and the second concrete structure layer is an obtuse angle, and the support piles and the second concrete structure layer are cast as one piece, and the plurality of support piles are arranged at intervals along the length direction of the groove.

[0018] By adopting the above technical solution, when the second concrete structure layer is subjected to a large external force such as vehicle load, the second concrete structure layer transmits the external force to the support piles and the soil base layer in turn; thereby, the soil base layer bears most of the external force to reduce the stress on the backfill body.

[0019] Optionally, the supporting piles and the second concrete structure layer are both reinforced concrete structures, a steel cage is buried in the supporting piles, a steel mesh is buried in the second concrete structure layer, and the longitudinal bars of the steel cage are bent and fastened to the steel mesh.

[0020] By adopting the above technical solution, the longitudinal bars of the steel cage are bent and then tied and fixed to the steel mesh, so as to improve the integrity of the second concrete structure layer and the supporting piles.

[0021] Optionally, along the direction away from the second concrete structure layer, the supporting pile includes a first pile segment and a second pile segment, and the diameter of the second pile segment is larger than the diameter of the first pile segment; correspondingly, the fixing groove is divided into a first fixing groove and a second fixing groove, the first fixing groove is used to accommodate the first pile segment, and the second fixing groove is used to accommodate the second pile segment.

[0022] By adopting the above technical solution, the second pile segment has an expanded bottom portion relative to the first pile segment, thereby improving the bearing capacity of a single supporting pile, reducing the number of supporting piles to be constructed, and improving construction efficiency.

[0023] Optionally, the supporting piles further include spiral hoops and steel strands, the spiral hoops are sleeved around the outer periphery of the steel cage, the spiral hoops are buried in the second pile section, and the outer diameter of the spiral hoops is greater than the diameter of the first fixing groove; one section of the steel strand is fixedly connected to the spiral hoops, and the other section of the steel strand is fixedly connected to the steel cage.

[0024] By adopting the above technical solution, spiral stirrups are used to tighten the concrete of the expanded bottom part of the second pile segment to improve the integrity of the concrete in the second pile segment; to give full play to the role of the expanded bottom part of the second pile segment, to reduce the risk of cracking of the concrete in the second pile segment due to large force, and to improve the bearing capacity of the single supporting pile.

[0025] A construction method for a rainwater-sewage diversion pipeline reconstruction structure comprises the following steps: Trench excavation: According to the design drawings, use concrete cutting equipment to cut the first concrete structure layer, and use excavation equipment to excavate the soil base to form a trench; Pad construction: pour plain concrete at the bottom of the trench to form a pad; Installation of rainwater pipes: Connect several rainwater pipes according to the design drawings, and conduct water flow tests and sealing tests to ensure the normal operation of the rainwater pipes; Backfill construction: backfill coarse sand and solidified soil on the cushion layer in sequence to form the first backfill and the second backfill; Waterproof component construction: Use concrete cutting equipment to cut a first installation groove on the first concrete structure layer, insert one end of the waterproof component into the first installation groove, and bond and fix the waterproof component to the first concrete structure layer; Construction of the second concrete structure layer: The first guide surface of the first concrete structure layer is roughened, and then a steel mesh is placed in the groove and concrete is poured to form the second concrete structure layer.

[0026] A construction method for a rainwater-sewage diversion pipeline reconstruction structure also includes support pile construction, including the following steps: Construction of fixed grooves: cutting fixed grooves in the soil base on both sides of the trench, and the fixed grooves include a first fixed groove and a second fixed groove; Construction of spiral stirrups: Sleeve the spiral stirrups on the outer circumference of the steel cage, and fix the bottom end of the spiral stirrups to the bottom of the steel cage; stretch the spiral stirrups to make them fit the outer circumference of the steel cage, and use ropes to flexibly connect the spiral stirrups to the steel cage, one end of the steel strand is fixedly connected to the spiral stirrups, and the other end of the steel strand is fixedly connected to the steel cage; place the steel cage and the spiral stirrups in the fixed grooves, and release the movable connection between the spiral fixation and the steel cage. The spiral stirrups fall due to gravity, so that the spiral stirrups are set at the expanded bottom part of the second fixed groove.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: 1. By burying waterproof components between the first concrete structure layer and the second concrete structure layer, the waterproof components prevent surface water from penetrating into the backfill body and the soil base through the joint between the first concrete structure layer and the second concrete structure; that is, by setting up the waterproof components, the erosion of the backfill body by surface water is weakened, the risk of uneven settlement of the backfill body and the second concrete structure layer is reduced, and the flatness of the ground is maintained, so as to facilitate people's travel; 2. The water-stop steel plate has good water-blocking performance, thereby effectively preventing surface water from penetrating along the gap between the first concrete structure layer and the second concrete structure layer; and the water-swelling rubber plate will swell when it comes into contact with water, thereby reducing the gap between the waterproof component and the first concrete structure layer and the second concrete structure layer, so as to further improve the waterproof performance of the structure; 3. When the second concrete structure layer is subjected to a large external force such as vehicle load, the second concrete structure layer transfers the external force to the support piles and the soil base layer in turn; thereby making the soil base layer bear most of the external force to reduce the stress on the backfill body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the rainwater and sewage diversion pipeline reconstruction structure in Example 1.

[0029] Figure 2 It is a cross-sectional view of the rainwater and sewage diversion pipeline reconstruction structure in Example 1.

[0030] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0031] Figure 4 yes Figure 2 Enlarged view of point B in the middle.

[0032] Figure 5 yes Figure 4 Enlarged view of point C in the middle.

[0033] Figure 6 It is a schematic diagram of the connection method of the waterproof component in Example 1.

[0034] Figure 7 It is a cross-sectional view of the rainwater and sewage diversion pipeline reconstruction structure in Example 3.

[0035] Figure 8 yes Figure 7 Enlarged view of point D in the middle.

[0036] Fig. 9 It is a schematic diagram of the first connection state of the spiral steel bar and the steel cage in Example 3.

[0037] Fig.10 It is a schematic diagram of the second connection state of the spiral steel bar and the steel cage in Example 3.

[0038] Explanation of the reference numerals in the accompanying drawings: 1. soil base layer; 11. groove; 12. fixing groove; 121. first fixing groove; 122. second fixing groove; 2. first concrete structural layer; 21. first installation groove; 22. first guide surface; 3. cushion layer; 4. rainwater pipe; 5. backfill body; 51. first backfill body; 52. second backfill body; 6. second concrete structural layer; 61. second installation groove; 62. second guide surface; 63. steel mesh; 7. waterproof component; 71. water-stop steel plate; 711. straight portion; 712. arc-shaped portion; 72. water-swelling rubber sheet; 73. waterproof coating layer; 8. supporting piles; 81. first pile section; 82. second pile section; 83. steel cage; 84. spiral stirrups; 85. steel strand; 86. reinforcing steel bars. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1 -10 Provide further details of this application.

[0040] Example 1 In some residential areas, industrial and commercial areas, and urban villages, combined sewer pipes are mostly used, that is, sewage and rainwater are discharged from the same pipe. Separate drainage is a drainage system that separates rainwater and sewage, and transports them separately through a pipe. Rainwater is connected to the municipal rainwater pipe system through the rainwater pipe network and discharged into urban water bodies such as rivers and lakes; while sewage is connected to the municipal sewage pipe system through the sewage pipe network and transported to the sewage treatment plant for treatment.

[0041] In the process of rainwater and sewage separation pipeline reconstruction, the existing combined sewer pipe can be used as a sewage pipe and connected to the municipal sewage pipe system; and a new rainwater pipe can be built and connected to the municipal rainwater pipe system. This reconstruction plan makes full use of the existing combined sewer pipe and uses it as a subsequent sewage pipe, which shortens the construction period and reduces the project investment.

[0042] When workers were laying new rainwater pipes, there was a gap between the newly poured concrete above the rainwater pipes and the original concrete due to the infiltration of the water supply, causing the backfill soil at the bottom of the new concrete to settle. As a result, under the long-term action of external loads (such as vehicle loads, etc.), the newly poured concrete would experience local settlement, making the ground uneven and affecting people's travel.

[0043] The embodiment of the present application discloses a rainwater and sewage diversion pipeline reconstruction structure to reduce uneven settlement of the ground above the rainwater pipe and improve the flatness of the ground.

[0044] Reference Figure 1 and Figure 2 The ground structure includes a soil base layer 1 and a first concrete structure layer 2 arranged on the soil base layer 1. The ground structure is provided with a groove 11, and the groove 11 is used to install a rainwater diversion pipeline reconstruction structure.

[0045] Reference Figure 1 and Figure 2 Specifically, the rainwater and sewage diversion pipeline reconstruction structure includes a cushion layer 3, a rainwater pipe 4, a backfill body 5, a second concrete structure layer 6 and a waterproof component 7.

[0046] Reference Figure 1 and Figure 2 , the cushion layer 3 is laid on the bottom wall of the groove 11, the rainwater pipe 4 is laid on the cushion layer 3, the backfill body 5 is laid on the side of the rainwater pipe 4 away from the cushion layer 3, and the second concrete structure layer 6 is laid on the backfill body 5, and the second concrete structure layer 6 is arranged flush with the first concrete structure layer. In this embodiment, the cushion layer 3 is cast by plain concrete to reduce the uneven settlement of the rainwater pipe 4. Along the direction away from the bottom layer, the backfill body 5 includes a first backfill body 51 and a second backfill body 52 in sequence. In this embodiment, the first backfill body 51 is coarse sand, so as to fix the position of the rainwater pipe 4 and improve the water permeability and air permeability of the structure; the material of the second backfill body 52 is solidified soil, that is, the engineering waste soil and the curing agent are fully mixed according to the designed ratio, and the second backfill body 52 is backfilled in layers, and tamping equipment is used while backfilling, for example, a frog-type tamping machine can be used to tamp the second backfill body 52. ​​In other embodiments, the second backfill soil can also be directly backfilled with plain soil.

[0047] Reference Figure 3 and Figure 4 The waterproof component 7 is buried in the first concrete structure layer and the second concrete structure layer 6, and the waterproof component 7 is set in the groove 11. The first concrete structure layer is provided with a first installation groove 21 for accommodating the waterproof component 7, and the second concrete structure layer 6 is provided with a second installation groove 61 for accommodating the waterproof component 7. The waterproof component 7 covers the joint between the first concrete structure layer and the second concrete structure layer 6.

[0048] Reference Figure 3 and Figure 4 The staff uses concrete cutting equipment to cut a first installation groove 21 on the first concrete structure layer, and inserts one end of the waterproof component 7 into the first installation groove 21.

[0049] Reference Figure 5 In this embodiment, the waterproof component 7 includes a water-stopping steel plate 71 and a water-swelling rubber plate 72. The water-stopping steel plate 71 is horizontally arranged, and two water-swelling rubber plates 72 are provided. The two water-swelling rubber plates 72 are bonded to both sides of the water-stopping steel plate 71. After the water-swelling rubber plates 72 expand, they abut against the side walls of the first mounting groove 21 and the second mounting groove 61.

[0050] The water-stop steel plate 71 has good water-blocking performance, thereby effectively preventing surface water from penetrating along the gap between the first concrete structure layer and the second concrete structure layer 6; and the water-swellable rubber plate 72 will swell when it encounters water, thereby reducing the generation of gaps between the waterproof component 7 and the first concrete structure layer and the second concrete structure layer 6, so as to further improve the waterproof performance of the structure. At the same time, the water-stop steel plate 71 includes a straight portion 711 and a wave portion, the straight portion 711 is arranged in the first installation groove 21, and the wave portion is arranged in the second installation groove 61. The straight portion 711 facilitates the insertion of the waterproof component 7 into the first installation groove 21, and the wave portion can further prevent the surface from penetrating into the backfill body 5, so as to reduce the settlement of the backfill body 5.

[0051] Reference Figure 6 Along the length direction of the groove 11, several waterproof components 7 need to be connected to form a continuous water stop strip structure. In this embodiment, adjacent water stop steel plates 71 are overlapped, and a waterproof coating layer 73 is brushed on the side of the water stop steel plate 71 away from the backfill body 5 to further improve the waterproof performance of the waterproof component 7 and reduce the penetration of water into the backfill body 5.

[0052] Reference Figure 3 and Figure 4 , a first guide surface 22 is provided on the side of the first concrete structure layer close to the second concrete structure layer 6, and the first guide surface 22 is set at an acute angle with the horizontal plane; a second guide surface 62 is provided on the side of the second concrete structure layer 6 close to the first concrete structure layer, and the second guide surface 62 is in contact with the first guide surface 22. Therefore, when the second concrete structure layer 6 is subjected to external forces such as vehicle loads, the second concrete structure layer 6 can transmit the external forces to the first concrete body and the soil base layer 1 in sequence through the second guide surface 62 and the first guide surface 22, so as to reduce the force on the backfill body 5 at the bottom of the second concrete structure layer 6, reduce the compression deformation of the backfill body 5, reduce the risk of cracking and uneven settlement of the second concrete structure layer 6, and improve the flatness of the ground.

[0053] Reference Figure 3and Figure 4 The second concrete structure layer 6 is a reinforced concrete structure, and a steel mesh 63 is buried in the second concrete structure layer 6. Specifically, the staff roughens the first guide surface 22 of the first concrete structure layer, then places the steel mesh 63 into the groove 11 and pours concrete to form the second concrete structure layer 6.

[0054] The implementation principle of a rainwater-sewage separation pipeline reconstruction structure and its construction method in the embodiment of the present application is: Reference Figure 1 and Figure 2 By burying the waterproof component 7 between the first concrete structure layer and the second concrete structure layer 6, the waterproof component 7 blocks the joint between the first concrete structure layer and the second concrete structure layer 6, thereby preventing surface water (such as rainwater) from penetrating into the backfill body 5 and the soil base layer 1 through the joint between the first concrete structure layer and the second concrete structure. That is, by setting the waterproof component 7, the erosion of the backfill body 5 by surface water is weakened, the risk of uneven settlement of the backfill body 5 and the second concrete structure layer 6 is reduced, and the flatness of the ground is maintained, so that people can travel easily.

[0055] Example 2 This embodiment 2 discloses the construction method of the rainwater and sewage diversion pipeline reconstruction structure in embodiment 1, referring to Figures 1 to 6 , the construction method comprises the following steps: Excavation of trench 11: According to the design drawings, the first concrete structure layer is cut using concrete cutting equipment, and the soil base layer 1 is excavated using excavation equipment to form trench 11.

[0056] Construction of cushion layer 3: Pour plain concrete into the bottom of trench 11 to form cushion layer 3.

[0057] Installation of rainwater pipes 4: According to the design drawings, several rainwater pipes 4 are connected, and water flow tests and sealing tests are performed to ensure that the rainwater pipes 4 work normally.

[0058] Construction of the backfill body 5: backfilling coarse sand and solidified soil in sequence on the cushion layer 3 to form a first backfill body 51 and a second backfill body 52.

[0059] Construction of waterproof component 7: Use concrete cutting equipment to cut a first installation groove 21 on the first concrete structure layer, insert one end of the waterproof component 7 into the first installation groove 21, and bond the waterproof component 7 to the first concrete structure layer.

[0060] Construction of the second concrete structure layer 6: The first guide surface 22 of the first concrete structure layer is roughened, and then a steel mesh 63 is placed in the groove 11 and concrete is poured to form the second concrete structure layer 6.

[0061] Example 3 The difference between this embodiment 3 and embodiment 1 is that: Reference Figures 7 and 8 The rainwater and sewage diversion pipeline reconstruction structure also includes a number of support piles 8. The support piles 8 are arranged on both sides of the groove 11 along the width direction of the groove 11. The soil base layer 1 on both sides of the groove 11 is provided with fixed grooves 12. The fixed grooves 12 are used to accommodate the support piles 8. The angle between the support piles 8 and the second concrete structure layer 6 is an obtuse angle. The support piles 8 and the second concrete structure layer 6 are cast integrally. When the second concrete structure layer 6 is subjected to a large external force such as a vehicle load, the second concrete structure layer 6 transfers the external force to the support piles 8 and the soil base layer 1 in turn; thereby, the soil base layer 1 bears most of the external force to reduce the force on the backfill body 5. It is worth noting that in order to improve the conciseness of the drawings in the specification, the drawings in the specification are attached. Figure 7-8 The support piles 8 and the second concrete structure layer 6 are not cross-hatched.

[0062] Reference Figures 7 and 8 , a plurality of support piles 8 are arranged at intervals along the length direction of the groove 11, and along the length direction of the groove 11, the support piles 8 on both sides of the groove 11 can be staggered or symmetrically arranged with respect to the groove 11; in the present embodiment, the support piles 8 on both sides of the groove 11 are symmetrically arranged with respect to the groove 11.

[0063] Reference Figures 7 and 8 , along the direction away from the second concrete structure layer 6, the support pile 8 includes a first pile segment 81 and a second pile segment 82, the diameter of the second pile segment 82 is greater than the diameter of the first pile segment 81; that is, the second pile segment 82 has an expanded bottom portion relative to the first pile segment 81, thereby improving the bearing capacity of a single support pile 8, reducing the number of support piles 8 to be constructed, and improving construction efficiency. Correspondingly, the fixing groove 12 is divided into a first fixing groove 121 and a second fixing groove 122, the first fixing groove 121 is used to accommodate the first pile segment 81, and the second fixing groove 122 is used to accommodate the second pile segment 82.

[0064] Reference Figures 7 and 8 In this embodiment, the support pile 8 is also a reinforced concrete structure, and a steel cage 83, spiral stirrups 84, steel strands 85 and reinforcing steel bars 86 are embedded in the support pile 8. The steel cage 83 is arranged in the first fixing groove 121 and the second fixing groove 122, and the longitudinal bars of the steel cage 83 extend into the second concrete structure layer 6, and the longitudinal bars of the steel cage 83 are bent and tied and fixed with the steel mesh 63 to improve the integrity of the second concrete structure layer 6 and the support pile 8, thereby reducing the risk of cracks between the support pile 8 and the second concrete structure layer 6, so that the second concrete structure layer 6 can transfer external force to the support pile 8 in time.

[0065] Reference Figures 7 and 8The spiral stirrup 84 is sleeved on the outer periphery of the steel cage 83, and the spiral stirrup 84 is buried in the second pile segment 82, and the outer diameter of the spiral stirrup 84 is greater than the diameter of the first fixing groove 121; the bottom end of the steel strand 85 is fixedly connected to the spiral stirrup 84, and the top end of the steel strand 85 is fixedly connected to the steel cage 83 through the steel strand 85, so that a gap for concrete to pass through is provided between adjacent coils of the spiral stirrup 84, so as to improve the density of the second pile segment 82.

[0066] Reference Figures 7 and 8 By setting bolt stirrups in the second fixing groove 122, the spiral stirrups 84 are used to tighten the concrete of the expanded bottom part of the second pile segment 82 to improve the integrity of the concrete in the second pile segment 82; to give full play to the role of the expanded bottom part of the second pile segment 82, reduce the risk of cracking of the concrete in the second pile segment 82 due to large force, and improve the bearing capacity of the single supporting pile 8.

[0067] Subsequently, the staff inserts the reinforcing steel bar 86 into the fixing groove 12 so that the reinforcing steel bar 86 is arranged across the second fixing groove 122 to further improve the bearing capacity of the supporting pile 8 .

[0068] The construction process in the support pile 8 is as follows: Reference Fig. 9 and Fig.10 After the steel cage 83 is processed, the staff will put the spiral stirrup 84 on the outer circumference of the steel cage 83, and the bottom end of the spiral stirrup 84 is fixedly connected to the bottom of the steel cage 83 (welded or bonded). In this embodiment, the bottom of the spiral stirrup 84 is welded and fixed to the bottom of the steel cage 83.

[0069] Subsequently, the staff stretches the spiral stirrup 84 so that the diameter of the coil in the spiral stirrup 84 is continuously reduced until the spiral stirrup 84 fits the outer periphery of the steel cage 83, and uses ropes to flexibly connect the spiral stirrup 84 to the steel cage 83 (for example, by making a flex buckle). One end of the steel strand 85 is fixedly connected to the top of the spiral stirrup 84, and the other end of the steel strand 85 is fixedly connected to the steel cage 83. At this time, the steel strand 85 is in a relaxed state.

[0070] Next, the staff places the steel cage 83 and the spiral stirrup 84 in the fixing groove 12, and releases the movable connection between the spiral fixing and the steel cage 83. The spiral stirrup 84 falls down due to gravity, and the outer diameter of the spiral stirrup 84 gradually increases, so that the outer diameter of the spiral stirrup 84 is larger than the diameter of the first fixing groove 121, so that the spiral stirrup 84 is arranged at the expanded bottom part of the second fixing groove 122.

[0071] The staff bends the longitudinal bars of the steel cage 83 and ties and fixes the longitudinal bars of the steel cage 83 to the steel mesh 63 .

[0072] Finally, the workers pour concrete into the trench 11 , the concrete fills the fixing groove 12 to form the support pile 8 , and the concrete fills the trench 11 to form the second concrete structure layer 6 .

[0073] Example 4 This embodiment 4 discloses the construction method of the rainwater and sewage diversion pipeline reconstruction structure in embodiment 3. The differences between the construction methods in this embodiment 4 and embodiment 3 are as follows: Figures 7 to 10 Between the construction of the backfill body 5 and the construction of the waterproof assembly 7, the construction of the support pile 8 is also included, including the following steps: Construction of the fixing groove 12: cutting the fixing groove 12 in the soil base 1 on both sides of the groove 11, and the fixing groove 12 includes a first fixing groove 121 and a second fixing groove 122; Construction of spiral stirrups 84: The spiral stirrups 84 are sleeved on the outer circumference of the steel cage 83, and the bottom end of the spiral stirrups 84 is fixedly connected to the bottom of the steel cage 83; the spiral stirrups 84 are stretched to fit the outer circumference of the steel cage 83, and the spiral stirrups 84 and the steel cage 83 are movably connected using ropes, one end of the steel strand 85 is fixedly connected to the spiral stirrups 84, and the other end of the steel strand 85 is fixedly connected to the steel cage 83; the steel cage 83 and the spiral stirrups 84 are placed in the fixing groove 12, and the movable connection between the spiral fixation and the steel cage 83 is released, and the spiral stirrups 84 fall down due to the action of gravity, so that the spiral stirrups 84 are set in the expanded bottom part of the second fixing groove 122.

[0074] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rainwater-sewage diversion pipeline reconstruction structure, the ground structure comprising a soil base (1), a first concrete structure layer (2) arranged on the soil base (1), the ground structure being provided with a groove (11); characterized in that: The rainwater-sewage diversion pipeline reconstruction structure is arranged in the groove (11), and comprises a cushion layer (3), a rainwater pipe (4), a backfill body (5), a second concrete structure layer (6), and a waterproof component (7); the cushion layer (3) is laid on the bottom wall of the groove (11), the rainwater pipe (4) is laid on the cushion layer (3), the backfill body (5) is laid on the side of the rainwater pipe (4) away from the cushion layer (3), the second concrete structure layer (6) is laid on the backfill body (5), and the second concrete structure layer (6) The waterproof component (7) is arranged flush with the first concrete structure layer; the waterproof component (7) is buried in the first concrete structure layer and the second concrete structure layer (6), and the waterproof component (7) is arranged in the groove (11); the first concrete structure layer is provided with a first installation groove (21) for accommodating the waterproof component (7); the second concrete structure layer (6) is provided with a second installation groove (61) for accommodating the waterproof component (7); and the waterproof component (7) covers the joint between the first concrete structure layer and the second concrete structure layer (6).

2. The rainwater and sewage diversion pipeline reconstruction structure according to claim 1 is characterized by: The waterproof assembly (7) comprises a water-stopping steel plate (71) and a water-swelling rubber plate (72); the water-stopping steel plate (71) is arranged horizontally; two water-swelling rubber plates (72) are provided; the two water-swelling rubber plates (72) are bonded to two sides of the water-stopping steel plate (71); after the water-swelling rubber plates (72) expand, they abut against the side walls of the first mounting groove (21) and the second mounting groove (61).

3. The rainwater and sewage diversion pipeline reconstruction structure according to claim 2 is characterized in that: The water-stopping steel plate (71) comprises a straight portion (711) and a wavy portion, the straight portion (711) being arranged in the first mounting groove (21), and the wavy portion being arranged in the second mounting groove (61).

4. The rainwater and sewage diversion pipeline reconstruction structure according to claim 1 is characterized in that: A first guide surface (22) is provided on a side of the first concrete structure layer close to the second concrete structure layer (6), and the first guide surface (22) is arranged at an acute angle with a horizontal plane; a second guide surface (62) is provided on a side of the second concrete structure layer (6) close to the first concrete structure layer, and the second guide surface (62) is in contact with the first guide surface (22).

5. The rainwater and sewage diversion pipeline reconstruction structure according to claim 1 is characterized in that: It also comprises a plurality of support piles (8), which are arranged on both sides of the groove (11) along the width direction of the groove (11), and the soil base layers (1) on both sides of the groove (11) are provided with fixing grooves (12), and the fixing grooves (12) are used to accommodate the support piles (8), and the angle between the support piles (8) and the second concrete structure layer (6) is an obtuse angle, and the support piles (8) and the second concrete structure layer (6) are integrally cast and formed, and the plurality of support piles (8) are arranged at intervals along the length direction of the groove (11).

6. The rainwater and sewage diversion pipeline reconstruction structure according to claim 5 is characterized in that: The support pile (8) and the second concrete structure layer (6) are both reinforced concrete structures; a steel cage (83) is embedded in the support pile (8); a steel mesh (63) is embedded in the second concrete structure layer (6); the longitudinal bars of the steel cage (83) are bent and tied to the steel mesh (63) for fixation.

7. The rainwater and sewage diversion pipeline reconstruction structure according to claim 6 is characterized in that: Along a direction away from the second concrete structure layer (6), the support pile (8) comprises a first pile segment (81) and a second pile segment (82), the diameter of the second pile segment (82) being greater than the diameter of the first pile segment (81); correspondingly, the fixing groove (12) is divided into a first fixing groove (121) and a second fixing groove (122), the first fixing groove (121) being used to accommodate the first pile segment (81), and the second fixing groove (122) being used to accommodate the second pile segment (82).

8. The rainwater and sewage diversion pipeline reconstruction structure according to claim 7 is characterized by: The support pile (8) further comprises a spiral stirrup (84), the spiral stirrup (84) being sleeved on the outer circumference of the steel cage (83), the spiral stirrup (84) being embedded in the second pile section (82), and the outer diameter of the spiral stirrup (84) being greater than the diameter of the first fixing groove (121).

9. A construction method for a rainwater-sewage diversion pipeline reconstruction structure according to any one of claims 1 to 8, characterized in that: The following steps are involved: Trench (11) excavation: according to the design drawings, the first concrete structure layer is cut using concrete cutting equipment, and the soil base layer (1) is excavated using excavation equipment to form the trench (11); Construction of cushion layer (3): pouring plain concrete into the bottom of the trench (11) to form cushion layer (3); Installation of rainwater pipes (4): according to the design drawings, several rainwater pipes (4) are connected, and water flow tests and sealing tests are performed to ensure that the rainwater pipes (4) are working properly; Construction of the backfill body (5): backfilling the cushion layer (3) with coarse sand and solidified soil in sequence to form a first backfill body (51) and a second backfill body (52); Construction of the waterproof component (7): using concrete cutting equipment to cut a first installation groove (21) on the first concrete structure layer, inserting one end of the waterproof component (7) into the first installation groove (21), and bonding and fixing the waterproof component (7) to the first concrete structure layer; Construction of the second concrete structure layer (6): The first guide surface (22) of the first concrete structure layer is roughened, and then a steel mesh (63) is placed in the groove (11), and concrete is poured to form the second concrete structure layer (6).

10. The construction method of the rainwater and sewage diversion pipeline reconstruction structure according to claim 9 is characterized in that: The construction of the supporting piles (8) includes the following steps: Construction of the fixing groove (12): cutting the fixing groove (12) in the soil base layer (1) on both sides of the groove (11), wherein the fixing groove (12) comprises a first fixing groove (121) and a second fixing groove (122); Construction of the spiral stirrup (84): the spiral stirrup (84) is sleeved on the outer circumference of the steel cage (83), and the bottom end of the spiral stirrup (84) is fixedly connected to the bottom of the steel cage (83); the spiral stirrup (84) is stretched so that the spiral stirrup (84) fits the outer circumference of the steel cage (83), and the spiral stirrup (84) and the steel cage (83) are movably connected by a rope, one end of the steel strand (85) is fixedly connected to the spiral stirrup (84), and the other end of the steel strand (85) is fixedly connected to the steel cage (83); the steel cage (83) and the spiral stirrup (84) are placed in the fixing groove (12), and the movably connected spiral fixing and the steel cage (83) are released, and the spiral stirrup (84) falls down due to gravity, so that the spiral stirrup (84) is set at the expanded bottom part of the second fixing groove (122).

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