Highway box culvert structure

Abstract

This invention relates to the field of highway construction technology and discloses a box culvert structure for highways. The highway box culvert structure includes a box culvert, ribs, connecting beams, and a first precast pipe pile. Adjacent box culverts are connected by ribs, and adjacent ribs are connected by connecting beams. A concrete cushion layer and a cement-stabilized crushed stone layer are provided below the box culvert. The bottom of the first precast pipe pile passes through the concrete cushion layer and the cement-stabilized crushed stone layer and extends into the underground soil layer. The top of the first precast pipe pile extends into the connecting beam and connects with it. The use of ribs to connect adjacent box culverts, the construction of connecting beams beneath the ribs to connect all box culverts, the connection of the ribs to the precast box culverts, and the connection of the connecting beams to the first precast pipe piles to form a whole, with the concrete cushion layer providing load-bearing support for the superstructure and the cement-stabilized crushed stone layer bearing vertical loads, avoids uneven settlement and ensures the comfort of highway vehicle traffic.

Description

Technical Field

[0001] This invention relates to the field of highway construction technology, and in particular to a box culvert structure for expressways. Background Technology

[0002] When a highway intersects with a regular road, the highway is typically positioned above the regular road. This is achieved by constructing a culvert beneath the highway, allowing for cross-traffic. The conventional approach is for vehicles below to detour first, while construction of the culvert takes place in the intersection area. Once the culvert is completed, construction of the highway above begins. While feasible, this method is time-consuming, inefficient, and costly. Using a prefabricated structure for the culvert would significantly shorten the construction period, improve efficiency, and reduce costs. However, uneven settlement can easily occur between the assembled components of the culvert and between adjacent culverts. When the culvert is far from the highway, this settlement may not immediately affect the highway surface. But if they are close together, it can range from affecting the comfort of highway traffic to causing highway gridlock. Summary of the Invention

[0003] Based on the above problems, the purpose of this invention is to provide a highway box culvert structure that can avoid uneven settlement and ensure the comfort of highway vehicles.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The highway box culvert structure includes a box culvert, ribs, connecting beams, and a first precast pipe pile. Two adjacent box culverts are connected by the ribs, and two adjacent ribs are connected by the connecting beams. A concrete cushion layer and a cement-stabilized crushed stone layer are provided below the box culvert. The bottom of the first precast pipe pile passes through the concrete cushion layer and the cement-stabilized crushed stone layer and extends into the underground soil layer. The top of the first precast pipe pile extends into the connecting beam and is connected to the connecting beam.

[0006] As an optional embodiment of the highway box culvert structure of the present invention, the rib plate is provided with a connector, which is connected to the reinforcing steel of the connecting beam.

[0007] As an optional embodiment of the highway box culvert structure of the present invention, the box culvert is provided with a concrete road surface layer that is higher in the middle and lower on both sides.

[0008] As an optional solution for the highway box culvert structure of the present invention, cement-stabilized crushed stone is used for backfilling between two adjacent ribs.

[0009] As an optional embodiment of the highway box culvert structure of the present invention, a first drainage channel is provided inside the box culvert, a second drainage channel is provided inside the rib plate, and two adjacent second drainage channels are connected through a third drainage channel.

[0010] As an optional embodiment of the highway box culvert structure of the present invention, it also includes an opening wall, which includes a wall body, a wall foundation structure and a second precast pipe pile. The wall body is disposed on the wall foundation structure, and the second precast pipe pile is used to support the wall foundation structure. The wall body is provided with a drainage hole, which is connected to the second drainage channel.

[0011] As an optional embodiment of the highway box culvert structure of the present invention, a drainage structure is provided inside the opening wall. The drainage structure includes a drainage board and a drainage pipe. The drainage board is provided on the inner side wall of the opening wall. The drainage pipe is connected to the drainage hole. A threaded steel bar is provided at the bottom of the drainage pipe. The threaded steel bar extends into the wall body. A plastic sleeve is provided on the outer periphery of the threaded steel bar. The plastic sleeve extends into the wall body.

[0012] As an optional embodiment of the highway box culvert structure of the present invention, the drainage board is configured as a bend, and the bend end of the drainage board is stitched with nylon rope.

[0013] As an optional embodiment of the highway box culvert structure of the present invention, the box culvert includes a top block, a first bottom side block, and a second bottom side block. The first bottom side block is connected to the top block by a first bolt, and the second bottom side block is connected to the top block by a second bolt. The first bottom side block and the second bottom side block are connected by a third bolt. The first bolt and the second bolt are both straight bolts, and the third bolt is an arc bolt. The top block, the first bottom side block, and the second bottom side block are all provided with prestressed wire harness channels.

[0014] As an optional solution for the highway box culvert structure of the present invention, a water-blocking strip and an elastic sealing gasket are provided at the joint between two adjacent box culverts. The joint is provided with polyethylene foam strip, water-swellable waterproofing adhesive, neoprene latex cement mortar and interface treatment agent in sequence from the inside to the outside. The water-blocking strip and the polyethylene foam strip are connected.

[0015] The beneficial effects of this invention are as follows:

[0016] The highway box culvert structure provided by this invention uses ribs to connect two adjacent box culverts, and a connecting beam is constructed under the ribs to connect all the box culverts. The ribs are connected to the prefabricated box culverts, and the connecting beams are connected to the first precast pipe piles to form a whole. The concrete cushion layer plays a load-bearing role on the superstructure, and the cement-stabilized crushed stone layer bears the vertical load, avoiding uneven settlement and ensuring the comfort of highway vehicle passage. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0018] Figure 1 This is a first cross-sectional schematic diagram of a highway box culvert structure provided in a specific embodiment of the present invention;

[0019] Figure 2 This is a second sectional view of a highway box culvert structure provided in a specific embodiment of the present invention;

[0020] Figure 3 This is a third sectional view of a highway box culvert structure provided in a specific embodiment of the present invention;

[0021] Figure 4 This is a fourth sectional view of the highway box culvert structure provided in a specific embodiment of the present invention;

[0022] Figure 5 This is a cross-sectional schematic diagram of the opening wall provided in a specific embodiment of the present invention;

[0023] Figure 6 This is a partial structural schematic diagram of the opening wall provided in a specific embodiment of the present invention;

[0024] Figure 7 This is a schematic diagram of the box culvert using the first connection method provided in a specific embodiment of the present invention;

[0025] Figure 8 This is a schematic diagram of the box culvert using the second connection method provided in a specific embodiment of the present invention;

[0026] Figure 9 This is a structural schematic diagram of the box culvert joint waterproofing measures before construction, provided in a specific embodiment of the present invention.

[0027] Figure 10 This is a schematic diagram of the structure after the waterproofing measures at the joints of the box culvert provided in a specific embodiment of the present invention have been completed;

[0028] Figure 11 This is a structural schematic diagram of the waterproofing measures between the box culvert and the concrete cushion layer provided in a specific embodiment of the present invention;

[0029] Figure 12 This is a structural schematic diagram of the waterproofing measures between the box culvert and the fine aggregate concrete protective layer provided in a specific embodiment of the present invention.

[0030] In the picture:

[0031] 1. Box culvert; 2. Rib plate; 3. Connecting beam; 4. First precast pipe pile; 5. Concrete cushion layer; 6. Cement-stabilized crushed stone layer; 7. Concrete road surface layer; 8. First drainage channel; 9. Second drainage channel; 10. Third drainage channel; 11. Opening wall; 12. Wall body; 13. Wall foundation structure; 14. Second precast pipe pile; 15. Drainage hole; 16. Drainage board; 17. Drainage pipe; 18. Threaded steel bar;

[0032] 19. Plastic sleeve; 20. Nylon rope; 21. Tunnel top block; 22. First bottom side block; 23. Second bottom side block; 24. First bolt; 25. Second bolt; 26. Third bolt; 27. Prestressed wire harness channel; 28. Pad; 29. ​​Spiral reinforcement; 30. Washer; 31. Water-blocking strip; 32. Elastic sealing gasket;

[0033] 33. Polyethylene foam strip; 34. Water-swellable sealant; 35. Chloroprene latex cement mortar; 36. Interface treatment agent; 37. Roll waterproofing layer; 38. Roll waterproofing reinforcement layer; 39. Fine aggregate concrete protective layer; 40. Coating waterproofing layer; 41. Coating waterproofing reinforcement layer; 42. Isolation layer; 43. Circumvention hole;

[0034] 44. Asphalt concrete; 45. Crash guardrail; 46. Hard shoulder; 47. High-strength foamed concrete; 48. Road surface structure. Detailed Implementation

[0035] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0038] like Figures 1 to 12 As shown, this embodiment provides a highway box culvert structure, which includes a box culvert 1, ribs 2, connecting beams 3, and a first precast pipe pile 4. Two adjacent box culverts 1 are connected by ribs 2, and two adjacent ribs 2 are connected by connecting beams 3. A concrete cushion layer 5 and a cement-stabilized crushed stone layer 6 are provided below the box culvert 1. The bottom of the first precast pipe pile 4 passes through the concrete cushion layer 5 and the cement-stabilized crushed stone layer 6 and extends into the underground soil layer. The top of the first precast pipe pile 4 extends into the connecting beam 3 and is connected to the connecting beam 3.

[0039] The connecting beam 3, which connects all box culverts 1, is constructed below rib 2. Rib 2 connects to the prefabricated box culvert 1, and connecting beam 3 connects to the first precast pipe pile 4 to form a whole. The top of box culvert 1 adopts a structure similar to an arch bridge, which can effectively solve the problem of arch crown stress. However, like arch bridges, this method results in significant stress at the arch foot. To address this issue, firstly, unlike commonly used prefabricated components, the connection point of box culvert 1 cannot be placed on the side wall. Secondly, increasing the thickness of the side wall cannot solve this problem, because the stress at the arch foot is decomposed into a horizontal force and a vertical force. Simply increasing the thickness of the side wall would make the side wall bulky, increasing costs and hindering transportation and installation, thus violating the original intention of prefabricated components. Therefore, rib 2 is attached to the prefabricated box culvert 1 to solve the arch foot stress problem.

[0040] The crash barrier 45 prevents highway vehicles from entering the road area of ​​the box culvert 1, separating vehicles going up and down. The asphalt concrete 44 is a conventional highway pavement structure 48, which will not be described in detail here. The high-strength foamed concrete 47 should be reinforced internally, serving two purposes: first, as the base layer of the highway, enhancing its overall load-bearing capacity; second, as a settling-reducing slab for the prefabricated box culvert 1, ensuring the highway's load is distributed more evenly across the box culvert 1 and reducing uneven settlement. The hard shoulder 46 primarily protects the asphalt concrete 44, preventing it from loosening and breaking. Ribs 2 are installed at the joints of the box culvert 1; this doesn't mean they can only be installed at the joints, but can be denser when necessary. The connecting beam 3 connects all the ribs 2 into a whole, and connects to the box culvert 1 through itself and the ribs 2, thus forming a unified whole for the entire prefabricated box culvert 1. Precast pipe piles serve as the supporting structure for the connecting beam 3.

[0041] The concrete foundation layer 5 should be a single unit, with its length equal to the angle of the inclined slab and its ends bent into a "7" shape. Its primary function is to support the superstructure and prevent uneven settlement. The cement-stabilized crushed stone layer 6 is not limited to the opening wall 11 during construction; this is mainly to save costs, as the existing concrete foundation layer 5 makes adding another cement-stabilized crushed stone layer 6 under the inclined slab less meaningful. However, the vertical loads generated by the opening wall 11, box culvert 1, and the highway are far greater than those of the inclined slab, hence the addition of the cement-stabilized crushed stone layer 6. The joints of box culvert 1 are connected by ribs 2 to form a single unit.

[0042] The top of the first precast pipe pile 4 should extend into the connecting beam 3. For example, the concrete at the end of the first precast pipe pile 4 should be broken to connect the reinforcing steel at the end of the first precast pipe pile 4 with the reinforcing steel of the connecting beam 3. If the distance between the high-strength foamed concrete 47 and the top of the rib plate 2 (i.e., the arch of the box culvert 1) is large, it is not necessary to use foamed concrete throughout. A cement-stabilized crushed stone layer 6 can be constructed below the foamed concrete. When the distance is very far, the required earth and stone can be backfilled under the cement-stabilized crushed stone layer 6.

[0043] Optionally, the rib plate 2 is equipped with a connector, which connects to the reinforcing bars of the connecting beam 3. The rib plate 2 and connecting beam 3 correspond to the positions of the prefabricated box culvert 1. The connector should be embedded during prefabrication at the manufacturer, and the threads inside the embedded connector should be coated with grease to facilitate subsequent rebar connection. The top of the connector should be fitted with a protective cap, and the outside of the protective cap should be tightly sealed with adhesive tape to prevent the protective cap from falling off during transportation or hoisting, which could damage the threads inside the connector. The connector is then connected to the box culvert 1 via threaded reinforcing bars to achieve the purpose of load-bearing.

[0044] To ensure effective drainage within the box culvert 1, optionally, a concrete road surface layer 7 with a higher center and lower sides may be provided inside the box culvert 1. The concrete road surface layer 7 may have a cross slope of 2% to enhance drainage.

[0045] Optionally, cement-stabilized crushed stone can be used as backfill between two adjacent ribs 2. The area between two adjacent ribs 2 is the non-rib area, which is backfilled with cement-stabilized crushed stone. Although the strength, stiffness, and stability of cement-stabilized crushed stone are not as good as those of reinforced concrete ribs 2, its cost and construction speed are better. At the same time, cement-stabilized crushed stone has good mechanical properties, high strength, good water stability, and good slab integrity. It can also restrain the box culvert structure, making the box culvert 1 a whole, and can also support the highway above.

[0046] Optionally, a first drainage channel 8 is provided inside the box culvert 1, and a second drainage channel 9 is provided inside the rib plate 2. Two adjacent second drainage channels 9 are connected by a third drainage channel 10. The first drainage channel 8 is located at the bottom corner area of ​​the box culvert 1, and a waterproof coating is applied around it. The waterproof coating can be a single-component polyurethane coating, modified asphalt waterproof coating, etc. The second drainage channel 9 is located at the bottom corner area of ​​the rib plate 2, and is a perforated steel pipe with a semi-circular upper section, wrapped with filter cloth. Non-second drainage channels 9 are also provided in areas outside the rib plate 2. These non-second drainage channels 9 are also perforated steel pipes with a semi-circular upper section, wrapped with filter cloth, and are connected to the second drainage channels 9.

[0047] Optionally, the highway culvert structure also includes an opening wall 11, which comprises a wall body 12, a wall foundation structure 13, and a second precast pipe pile 14. The wall body 12 is mounted on the wall foundation structure 13, and the second precast pipe pile 14 supports the wall foundation structure 13. The wall body 12 is provided with drainage holes 15, which are connected to the second drainage channel 9. The opening wall 11 mainly prevents misalignment between the culverts 1 and 12 over time. The two opening walls 11 fix the middle culvert 1, and the opening walls 11 should extend to both sides to better fix the culvert 1. An inclined plate with a slope not steeper than 1:1.5 is provided in front of the opening wall 11 to fix it. The wall foundation structure 13 supports the wall body 12 and connects the second precast pipe pile 14, and its main function is to transfer force. Drainage holes 15 are provided inside the wall body 12 to drain rainwater and other accumulated water, preventing damage to the structure due to rainwater.

[0048] Optionally, a drainage structure is provided behind the opening wall 11. This structure includes a drainage board 16 and a drainage pipe 17. The drainage board 16 is located on the inner wall of the opening wall 11. The drainage pipe 17 communicates with the drain hole 15. A threaded steel bar 18 is installed at the bottom of the drainage pipe 17, extending into the wall body 12. A plastic sleeve 19 is installed on the outer periphery of the threaded steel bar 18, extending into the wall body 12 to prevent water from corroding the threaded steel bar 18. The drainage principle involves using a three-dimensional composite drainage board 16 to collect water behind the wall. The water then flows downwards to the drainage pipe 17 by its own weight. The drainage pipe 17 can be an HDPE pipe, which is a type of pipe made of high-density polyethylene (HDPE). The upper half of the drainage pipe 17 has round holes to allow water from the drainage board 16 to enter. The lower half of the drainage pipe 17 is a straight pipe for water transport. To facilitate the installation of the drainage board 16, the drainage board 16 may optionally be configured as an elbow, with the elbow end of the drainage board 16 sewn together with nylon rope 20.

[0049] Optionally, the box culvert 1 includes a top block 21, a first bottom side block 22, and a second bottom side block 23. The first bottom side block 22 is connected to the top block 21 by a first bolt 24, and the second bottom side block 23 is connected to the top block 21 by a second bolt 25. The first bottom side block 22 and the second bottom side block 23 are connected by a third bolt 26. The first bolt 24 and the second bolt 25 are both straight bolts, and the third bolt 26 is an arc bolt. The top block 21, the first bottom side block 22, and the second bottom side block 23 are all provided with prestressed wire harness channels 27. The box culvert 1 adopts a spliced ​​structure, which can reduce assembly and transportation difficulties. Different components of the box culvert 1 are fastened together by bolts of different shapes, making assembly easy and the structure stable. It should be noted that the longitudinal segments of the box culvert 1 are connected using post-tensioned prestressed steel strands, similar to the connection of the front and rear blocks during bridge cantilever construction.

[0050] To ensure sufficient tension in the first bolt 24, second bolt 25, and third bolt 26, optionally, each of the first bolt 24 and second bolt 25 is provided with two nuts, and the third bolt 26 is provided with two nuts at one end and two nuts at the other end. Optionally, each of the first bolt 24, second bolt 25, and third bolt 26 is provided with a washer 28. The washer 28, as a load-bearing component of the nuts, can reduce damage to the surrounding concrete.

[0051] Optionally, the first bolt 24, the second bolt 25, and the third bolt 26 are all provided with spiral ribs 29. The spiral ribs 29 are located below the pad 28 and can provide a certain elastic force to buffer the impact force of the first bolt 24, the second bolt 25, and the third bolt 26. To prevent damage to the nuts, optionally, the first bolt 24, the second bolt 25, and the third bolt 26 are all provided with washers 30.

[0052] Optionally, the first bottom side block 22 is provided with a first embedded channel, and the second bottom side block 23 is provided with a second embedded channel. The third bolt 26 passes through the first and second embedded channels. The first and second embedded channels do not need to be threaded, which reduces construction costs and speeds up construction progress.

[0053] Optionally, the first bottom side block 22 includes a first right-angled segment and a first arc-shaped segment, and the second bottom side block 23 includes a second right-angled segment and a second arc-shaped segment. The first right-angled segment is connected to the second right-angled segment. One end of the top block 21 is connected to the first arc-shaped segment, and the other end of the top block 21 is connected to the second arc-shaped segment. The first bottom side block 22 and the second bottom side block 23 can have the same structure, thereby reducing processing costs. Optionally, the top block 21 is arc-shaped. The top block 21 adopts an arc shape similar to an arch bridge structure, which can effectively solve the stress problem of the arch top.

[0054] To facilitate the installation of the first bolt 24 and the second bolt 25, optionally, the first bottom side block 22 is provided with a first clearance groove, the second bottom side block 23 is provided with a second clearance groove, and the top block 21 is provided with a first screw hole and a second screw hole. One end of the first bolt 24 is threaded into the first screw hole, and the other end is located in the first clearance groove. One end of the second bolt 25 is threaded into the second screw hole, and the other end is located in the second clearance groove. Optionally, the first bottom side block 22 is provided with a third screw hole, the second bottom side block 23 is provided with a fourth screw hole, and the top block 21 is provided with a third and a fourth clearance groove. One end of the first bolt 24 is threaded into the third screw hole, and the other end is located in the third clearance groove. One end of the second bolt 25 is threaded into the fourth screw hole, and the other end is located in the fourth clearance groove. The top block 21 and the bottom side block are connected using both of these methods, and the two connection methods are used alternately.

[0055] It should be noted that after all connections are completed, the construction holes should be filled with sulfoaluminate ultra-early strength (micro-expansion) cement. During construction, in order to prevent the cement from hardening too quickly, an appropriate amount of ordinary Portland cement can be mixed in to extend the solidification time. The recommended mix ratio is sulfoaluminate ultra-early strength (micro-expansion) cement: ordinary Portland cement = 1:1. At the same time, before filling, interface treatment agent 36 should be applied to the inner wall of the manhole to enhance the connection effect.

[0056] Optionally, a water-blocking strip 31 and an elastic sealing gasket 32 ​​are installed at the joint between two adjacent box culverts 1. From the inside out, the joint is sequentially fitted with a polyethylene foam strip 33, a water-swellable sealant 34, a neoprene latex cement mortar 35, and an interface treatment agent 36. The water-blocking strip 31 and the polyethylene foam strip 33 are connected. The polyethylene foam strip 33 is made primarily of polyethylene resin, with added foaming agents, crosslinking agents, and other additives. It has low density, low water absorption, stable chemical properties, is not easily corroded, has good mechanical properties, is tough and flexible, abrasion resistant, has good processing performance, is easy to mold, and is relatively inexpensive. The water-swellable sealant 34 expands upon contact with water, thus providing a more reliable water-stopping effect. The interface treatment agent 36 is used at the interface between the neoprene latex cement mortar 35 and the assembled box culvert 1 to increase the bonding strength. The neoprene latex cement mortar 35 has good weather resistance, durability, impermeability, density, extremely high adhesion, and strong waterproof and anti-corrosion effects. Interface Treatment Agent 36 is an environmentally friendly material with bidirectional affinity, formulated from various high-molecular polymers and special cements, which increases the adhesion between two materials. Interface Treatment Agent 36 exhibits high bonding strength, does not crack, and has high plasticity. It is suitable for various substrate surfaces, significantly improving mutual adhesion. Interface Treatment Agent 36 has excellent water retention and high early strength. Application is quick, reducing labor intensity and costs.

[0057] To prevent water seepage between the box culvert 1 and the concrete cushion layer 5, optionally, a waterproof membrane 37 may be provided between the bottom slab of the box culvert 1 and the concrete cushion layer 5. To further improve the waterproofing effect, optionally, a waterproof membrane reinforcement layer 38 may be provided between the bottom of the joint and the waterproof membrane 37.

[0058] To prevent water seepage between the box culvert 1 and the fine aggregate concrete protective layer 39, optionally, a waterproof coating layer 40 is provided between the top slab of the box culvert 1 and the fine aggregate concrete protective layer 39. To further improve the waterproofing effect, optionally, a waterproof coating reinforcement layer 41 is provided between the top of the joint and the waterproof coating layer 40. To protect the waterproof coating layer 40, optionally, an isolation layer 42 is provided between the waterproof coating layer 40 and the fine aggregate concrete protective layer 39.

[0059] Before the box culvert 1 is assembled, the water-retaining strip 31 and the elastic sealing gasket 32 ​​are installed. Optionally, the water-retaining strip 31 and the elastic sealing gasket 32 ​​are alternately installed. Optionally, the elastic sealing gasket 32 ​​is made of rubber, which is readily available and inexpensive. Optionally, the elastic sealing gasket 32 ​​is provided with clearance holes 43. The elastic sealing gasket 32 ​​is made to fit tightly by pressing the clearance holes 43.

[0060] Optionally, a waterproof sealant is provided between two adjacent elastic sealing gaskets 32. The waterproof sealant expands upon contact with water and is applied to the contact surface of the elastic sealing gaskets 32. It should be noted that waterproofing is required for the entire exterior of the box culvert 1, and in areas with ribs 2, waterproofing is carried out together with the ribs 2.

[0061] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A box culvert structure for highways, characterized in that, The system includes a box culvert (1), ribs (2), connecting beams (3), and a first precast pipe pile (4). Two adjacent box culverts (1) are connected by the ribs (2), and two adjacent ribs (2) are connected by the connecting beams (3). A concrete cushion layer (5) and a cement-stabilized crushed stone layer (6) are provided below the box culverts (1). The bottom of the first precast pipe pile (4) passes through the concrete cushion layer (5) and the cement-stabilized crushed stone layer (6) and extends into the underground soil layer. The top of the first precast pipe pile (4) extends into the connecting beams (3) and is connected to the connecting beams (3). The box culvert (1) is provided with a first drainage channel (8), and the rib plate (2) is provided with a second drainage channel (9). Two adjacent second drainage channels (9) are connected by a third drainage channel (10). It also includes an opening wall (11), which includes a wall body (12), a wall foundation structure (13), and a second precast pipe pile (14). The wall body (12) is set on the wall foundation structure (13), and the second precast pipe pile (14) is used to support the wall foundation structure (13). The wall body (12) is provided with a drainage hole (15), which is connected to the second drainage channel (9). The opening wall (11) is provided with a drainage structure behind the wall. The drainage structure behind the wall includes a drainage board (16) and a drainage pipe (17). The drainage board (16) is located on the inner side wall of the opening wall (11). The drainage pipe (17) is connected to the drain hole (15). The bottom of the drainage pipe (17) is provided with a threaded steel bar (18). The threaded steel bar (18) extends into the wall body (12). The outer periphery of the threaded steel bar (18) is provided with a plastic sleeve (19). The plastic sleeve (19) extends into the wall body (12).

2. The highway box culvert structure according to claim 1, characterized in that, The rib plate (2) is provided with a connector, which is connected to the reinforcing steel of the connecting beam (3).

3. The highway box culvert structure according to claim 1, characterized in that, The box culvert (1) is equipped with a concrete road surface layer (7) that is higher in the middle and lower on both sides.

4. The highway box culvert structure according to claim 1, characterized in that, Cement-stabilized crushed stone is used to backfill the space between two adjacent ribs (2).

5. The highway box culvert structure according to claim 1, characterized in that, The drainage board (16) is configured as an elbow, and the elbow end of the drainage board (16) is sewn with nylon rope (20).

6. The highway box culvert structure according to claim 1, characterized in that, The box culvert (1) includes a top block (21), a first bottom side block (22), and a second bottom side block (23). The first bottom side block (22) is connected to the top block (21) by a first bolt (24), and the second bottom side block (23) is connected to the top block (21) by a second bolt (25). The first bottom side block (22) and the second bottom side block (23) are connected by a third bolt (26). The first bolt (24) and the second bolt (25) are both straight bolts, and the third bolt (26) is an arc bolt. The top block (21), the first bottom side block (22), and the second bottom side block (23) are all provided with prestressed wire harness channels (27).

7. The highway box culvert structure according to claim 1, characterized in that, A water-blocking strip (31) and an elastic sealing gasket (32) are provided at the joint between two adjacent box culverts (1). The joint is provided with polyethylene foam strip (33), water-swellable sealing adhesive (34), chloroprene latex cement mortar (35) and interface treatment agent (36) from the inside to the outside. The water-blocking strip (31) and the polyethylene foam strip (33) are connected.

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