Box culvert eight-character wall and construction method thereof

Abstract

The application relates to a box culvert splayed wall and a construction method thereof, the box culvert splayed wall comprising a body, a first supporting assembly and a second supporting assembly; a first splayed wall is arranged at the first end of the body, a second splayed wall is arranged at the second end of the body, the first splayed wall is internally provided with the first supporting assembly, the top end of the first supporting assembly is connected with the inner wall of the first splayed wall, the bottom end of the first supporting assembly is connected with the ground, the second splayed wall is internally provided with the second supporting assembly, the top end of the second supporting assembly is connected with the inner wall of the second splayed wall, and the bottom end of the second supporting assembly is connected with the ground; the construction steps are as follows: calculating the backfill pressure, designing the structure of the supporting assembly, constructing the foundation, constructing the supporting column or supporting stand, constructing the splayed wall and the supporting beam, laying the gravel layer and the geotextile, and constructing the backfill of the culvert; the first supporting assembly and the second supporting assembly are arranged, the supporting assembly supports the splayed wall, and the backfill of the culvert is prevented from damaging the splayed wall.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and in particular to a box culvert slant wall and its construction method. Background Technology

[0002] Currently, culverts are an important component of roadbed engineering, serving functions such as drainage and flood control, laying public pipelines, and providing passage. Culvert structures vary depending on their function, with box culverts being a common structural form in culvert design.

[0003] The retaining walls on both sides of a box culvert are generally designed as straight walls or sloping walls. Straight walls have higher construction costs because their height is the same as the height of the box culvert structure. Straight walls are generally used mainly in areas where land acquisition is restricted. At the junction of the straight wall and the roadbed, additional cone slopes must be constructed for roadbed slope protection. This type of structure has high construction costs and a long construction period. Sloping walls are a type of retaining wall designed based on the height of the box culvert and the slope ratio of the roadbed, and their construction is simple.

[0004] However, if the height of the splayed wall exceeds a certain level, and the active earth pressure of the backfill soil behind the wall exceeds the shear strength of the wall, the splayed wall will be at risk of instability and collapse. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a box culvert sloping wall and its construction method. Its advantage is that it can solve the technical problem that the sloping wall of the box culvert becomes unstable and collapses when the backfilling of the culvert exceeds a certain height.

[0006] The above-mentioned objective of this invention is achieved through the following technical solution: In one aspect, this invention provides a box culvert slant wall, including a body, a first support component, and a second support component; a first slant wall is provided at a first end of the body, a second slant wall is provided at a second end of the body, the first support component is provided inside the first slant wall, the top end of the first support component is connected to the inner wall of the first slant wall, and the bottom end of the first support component is connected to the ground; the second support component is provided inside the second slant wall, the top end of the second support component is connected to the inner wall of the second slant wall, and the bottom end of the second support component is connected to the ground.

[0007] Preferably, the box culvert slant wall provided by the present invention includes a first support component comprising an annular support beam and a support unit. The annular support beam is adapted to the structure of the first slant wall and is disposed within the first slant wall. The opposite ends of the annular support beam are respectively connected to the two inner sidewalls of the first slant wall. The top end of the support unit is connected to the bottom surface of the annular support beam, and the bottom end of the support unit is connected to the ground.

[0008] Preferably, the box culvert slant wall provided by the present invention includes a supporting unit comprising a connecting beam and two opposing supporting columns. The top ends of the two supporting columns are connected to the bottom surface of the connecting beam, and the bottom ends of the two supporting columns are connected to the ground. The side of the connecting beam away from the supporting columns is connected to the bottom surface of the annular supporting beam.

[0009] Preferably, in the box culvert slant wall provided by the present invention, the annular support beam is trapezoidal.

[0010] Preferably, in the box culvert slant wall provided by the present invention, the second support component includes a straight support beam and a support column. The straight support beam is disposed inside the second slant wall, and the two ends of the straight support beam are respectively connected to the two opposite inner sidewalls of the second slant wall through connecting plates. The top end of the support column is connected to the bottom surface of the straight support beam, and the bottom end of the support column is connected to the bottom surface.

[0011] Preferably, the height of the first wing wall of the box culvert provided by the present invention is greater than or equal to 10m.

[0012] Preferably, in the box culvert wing wall provided by the present invention, the height of the second wing wall is less than 10m.

[0013] On the other hand, the present invention provides a construction method for the box culvert sloping wall as described above, comprising the following steps:

[0014] Calculate the backfill soil pressure behind the culvert;

[0015] Structural design of the first and second support components;

[0016] A foundation bearing capacity test is conducted on the locations of the first wing wall, the second wing wall, the first support component, and the second support component. If the foundation bearing capacity does not meet the design requirements, replacement or pile foundation treatment is adopted to make the foundation bearing capacity meet the requirements. If the foundation bearing capacity meets the design requirements, the foundation construction of the first wing wall, the second wing wall, the first support component, and the second support component is carried out on the foundation.

[0017] The concrete for the support columns and / or support pillars is poured to a predetermined distance below the top of the column, and the remaining part is poured together with the annular support beam and / or the straight support beam.

[0018] The wing wall is constructed according to the design drawings. The wing wall is poured in two stages. The first pouring stops at a preset value under the support beam. The second pouring is done together with the support beam to form an integral structure between the wing wall and the support beam. Multiple drainage holes are provided on the wing wall, with a preset distance between two adjacent drainage holes.

[0019] A layer of crushed stone is filled in, and a geotextile is laid on top of the crushed stone layer. The geotextile extends upward along the height of the fill and is closely attached to the wall body of the slanted wall.

[0020] Backfilling is carried out on the geotextile.

[0021] Preferably, the construction method of the box culvert sloping wall provided by the present invention includes calculating the backfill soil pressure behind the culvert, which includes: calculating the Coulomb soil pressure based on the backfill soil height behind the culvert; and when the Coulomb soil pressure is greater than or equal to the shear resistance of the sloping wall, setting up a support component inside the sloping wall to resist the backfill soil pressure behind the culvert.

[0022] Preferably, the construction method for the box culvert sloping wall provided by the present invention includes the structural design of the first support component and the second support component, comprising: determining the structure of the first support component according to the height of the first sloping wall; when the highest point of the first sloping wall exceeds 10m, designing two support beams, the two support beams being connected to form a ring support beam; when the span between the two support beams exceeds 8m, setting support columns under the support beams; when the highest point of the second sloping wall is less than 10m, the support beam is a straight support beam, the two ends of the straight support beam being connected to the two opposite inner sidewalls of the second sloping wall respectively through connecting plates.

[0023] In summary, the beneficial technical effects of this invention are as follows: The box culvert sloping wall and its construction method provided in this application include a box culvert sloping wall comprising a body, a first support component, and a second support component; a first sloping wall is provided at the first end of the body, and a second sloping wall is provided at the second end of the body; a first support component is provided inside the first sloping wall, with its top end connected to the inner wall of the first sloping wall and its bottom end connected to the ground; a second support component is provided inside the second sloping wall, with its top end connected to the inner wall of the second sloping wall and its bottom end connected to the ground; the construction steps are: calculating backfill soil pressure - designing the structure of the support component - foundation construction - construction of support columns or support pillars - construction of the sloping wall and support beam - laying a layer of crushed stone and geotextile - backfilling construction of the culvert back; by setting the first support component and the second support component, the support component supports the sloping wall, preventing damage to the sloping wall caused by backfilling of the culvert back. Attached Figure Description

[0024] Figure 1 This is a plan view of the box culvert's herringbone wall provided in an embodiment of the present invention.

[0025] Figure 2 This is a perspective view of the box culvert's herringbone wall provided in an embodiment of the present invention.

[0026] Figure 3 This is a flowchart of a construction method for a box culvert herringbone wall provided in another embodiment of the present invention.

[0027] In the diagram, 1. Box culvert slant wall; 10. Main body; 11. First slant wall; 12. Second slant wall; 20. First support component; 21. Circular support beam; 211. First support beam; 212. Second support beam; 213. First connecting beam; 214. Second connecting beam; 22. Support unit; 221. Connecting beam; 222. Support column; 30. Second support component; 31. Straight support beam; 32. Support column; 33. Connecting plate. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Reference Figure 1 and Figure 2 The present invention discloses a box culvert herringbone wall 1, comprising a body 10, a first support component 20, and a second support component 30. A first herringbone wall 11 is provided at the first end of the body 10, and a second herringbone wall 12 is provided at the second end of the body 10. The first support component 20 is provided inside the first herringbone wall 11, with its top end connected to the inner wall of the first herringbone wall 11 and its bottom end connected to the ground. The second support component 30 is provided inside the second herringbone wall 12, with its top end connected to the inner wall of the second herringbone wall 12 and its bottom end connected to the ground. By providing the first support component 20 and the second support component 30, the support components support the herringbone wall and prevent damage to the herringbone wall caused by backfilling of the culvert backfill.

[0030] Specifically, the first end and the second end of the main body 10 are positioned opposite each other.

[0031] Furthermore, in this embodiment, the first support component 20 includes an annular support beam 21 and a support unit 22. The annular support beam 21 is adapted to the structure of the first wing wall 11. The annular support beam 21 is disposed inside the first wing wall 11, and the two opposite ends of the annular support beam 21 are respectively connected to the two inner sidewalls of the first wing wall 11. The top end of the support unit 22 is connected to the bottom surface of the annular support beam 21, and the bottom end of the support unit 22 is connected to the ground. By setting the annular support beam 21, the stability of the support beam is improved, and the firmness of the first wing wall 11 is further improved.

[0032] For example, the annular support beam 21 is trapezoidal; of course, the annular support beam 21 can also be in the shape of an "II". In a trapezoidal configuration of the annular support beam 21, the annular support beam 21 includes a first support beam 211, a second support beam 212, a first connecting beam 213, and a second connecting beam 214. The first support beam 211 and the second support beam 212 are spaced apart along the length of the body 10 and are parallel to each other. The first connecting beam 213 and the second connecting beam 214 are opposite to each other. One end of the first connecting beam 213 is connected to the first end of the first support beam 211, and the other end is connected to the first end of the second support beam 212. One end of the second connecting beam 214 is connected to the second end of the first support beam 211, and the other end is connected to the second end of the second support beam 212. The first support beam 211, the first connecting beam 213, the second support beam 212, and the second connecting beam 214 are connected end-to-end to form the annular support beam 21. Figure 1 Taking the orientation shown as an example, the outer wall of the first connecting beam 213 is connected to the left inner wall of the first wing wall 11, and the outer wall of the second connecting beam 214 is connected to the right inner wall of the first wing wall 11.

[0033] It should be noted that when the height of the first V-shaped wall 11 is greater than or equal to 10m, the support beam in the first support component 20 adopts a ring support beam 21.

[0034] Furthermore, in this embodiment, the support unit 22 includes a connecting beam 221 and two opposing support columns 222. The top ends of the two support columns 222 are connected to the bottom surface of the connecting beam 221, and the bottom ends of the two support columns 222 are connected to the ground. The side of the connecting beam 221 facing away from the support columns 222 is connected to the bottom surface of the annular support beam 21. By setting the connecting beam 221, the stability of the support unit 22 is enhanced.

[0035] Specifically, the two support columns 222 are arranged in parallel, and the extension direction of the support columns 222 is perpendicular to the extension direction of the support beam. The extension direction of the connecting beam 221 is perpendicular to the support columns 222.

[0036] The support columns 222 and the support beams are arranged in a one-to-one correspondence. The two support columns 222 are the first support column 222 and the second support column 222. The top of the first support column 222 is connected to the bottom surface of the first support beam 211 through the connecting beam 221, and the top of the second support column 222 is connected to the bottom surface of the second support beam 212 through the connecting beam 221.

[0037] It should be noted that when the first support beam 211 and the second support beam 212 are spaced a certain distance L apart, the support unit 22 includes two support columns 222.

[0038] Where L is greater than 8m.

[0039] Furthermore, in this embodiment, the second support component 30 includes a straight support beam 31 and a support column 32. The straight support beam 31 is disposed inside the second V-shaped wall 12, and the two ends of the straight support beam 31 are respectively connected to the two opposite inner sidewalls of the second V-shaped wall 12 through connecting plates 33. The top end of the support column 32 is connected to the bottom surface of the straight support beam 31, and the bottom end of the support column 32 is connected to the bottom surface.

[0040] Specifically, the extension direction of the straight support beam 31 is perpendicular to the extension direction of the support column 32.

[0041] The structure of the connecting plate 33 can be 3000*800*600mm. Of course, the connecting plate 33 can also adopt other structures, as long as it can meet the requirement that the end of the straight support beam 31 is connected to the second V-shaped wall 12 through the connecting plate 33.

[0042] For example, the support column 32 can be located at the middle of the straight support beam 31 along its extension direction. Of course, the support column 32 can also be located at the end of the straight support beam 31.

[0043] It should be noted that when the height of the second V-shaped wall 12 is less than 10m, the support beam in the second support component 30 adopts a straight support beam 31.

[0044] Continue to refer to Figure 3 Another embodiment provides a construction method for the herringbone wall 1 of a box culvert, including the following steps:

[0045] S101. Calculate the backfill soil pressure behind the culvert.

[0046] S101, Calculating the backfill soil pressure of the culvert includes: calculating the Coulomb soil pressure based on the backfill soil height of the culvert, wherein the force on the back of the wing wall is the hypothetical back of the wall force along the line connecting the bottom of the wall heel and the top of the back side of the wall, and when the Coulomb soil pressure is greater than or equal to the shear resistance of the wing wall, a support component is installed in the wing wall to resist the backfill soil pressure of the culvert.

[0047] It should be noted that the support component is either the first support component 20 or the second support component 30.

[0048] S102, Structural design of the first support component 20 and the second support component 30.

[0049] The structural design of S102, the first support component 20, and the second support component 30 includes: determining the structure of the first support component 20 according to the height of the first wing wall 11; when the highest point of the first wing wall 11 exceeds 10m, it is designed as two support beams, which are connected to form a ring support beam 21; when the span between the two support beams exceeds 8m, a support column 222 is set under the support beam; when the highest point of the second wing wall 12 is less than 10m, the support beam is a straight support beam 31, and the two ends of the straight support beam 31 are respectively connected to the two opposite inner side walls of the second wing wall 12 through connecting plates 33.

[0050] Specifically, both the supporting beam and the straight supporting beam 31 can adopt a structure with a height and width of 700*700mm.

[0051] It should be noted that the number of supporting beams is determined based on the height of the wing-shaped wall, and the number of supporting columns 222 is determined based on the span between the two supporting beams.

[0052] When the support assembly includes two or more support columns 222, the upper part of the support columns 222 is connected by a connecting beam 221 to enhance the stability of the support assembly.

[0053] When the highest point of the first V-shaped wall 11 exceeds 10m and is designed as two supporting beams, the two supporting beams include a first supporting beam 211 and a second supporting beam 212. The first end of the first supporting beam 211 is connected to the first end of the second supporting beam 212 through a first connecting beam 213, and the second end of the first supporting beam 211 is connected to the second end of the second supporting beam 212 through a second connecting beam 214, so that the first supporting beam 211 and the second supporting beam 212 form a ring supporting beam 21.

[0054] In the feasible method of using a straight support beam 31 as the support beam, the structure of the connecting plate 33 can be 3000*800*600mm. Of course, the connecting plate 33 can also adopt other structures, as long as it can meet the requirement that the end of the straight support beam 31 is connected to the second V-shaped wall 12 through the connecting plate 33.

[0055] Specifically, the supporting beams are connected to the supporting columns 222 or the first wing wall 11 by steel bar binding; the straight supporting beams 31 are connected to the supporting columns 32 by steel bar binding.

[0056] S103. Conduct foundation bearing capacity tests on the locations of the first wing wall 11, the second wing wall 12, the first support component 20, and the second support component 30. If the foundation bearing capacity does not meet the design requirements, use replacement or pile foundation treatment to make the foundation bearing capacity meet the requirements. If the foundation bearing capacity meets the design requirements, carry out foundation construction on the foundation of the first wing wall 11, the second wing wall 12, the first support component 20, and the second support component 30.

[0057] S104, the concrete of the support column 222 and / or support column 32 is poured to a predetermined distance below the top of the column, and the remaining part is poured together with the annular support beam 21 and / or the straight support beam 31.

[0058] It should be noted that the preset distance ranges from 20cm to 50cm. In this embodiment, the preset distance is 30cm, which means that the concrete of the support column 222 and / or the support column 32 is poured to 30cm below the top of the column, and the remaining part is poured together with the annular support beam 21 and / or the straight support beam 31.

[0059] For example, the support column 222 or the support column 32 can adopt an 800*800mm structure. Of course, the support column 222 or the support column 32 can also adopt other structures.

[0060] S105. Construct the wing wall according to the design drawings. The wing wall is poured in two stages. The first pouring stops at the preset value under the support beam. The second pouring is done together with the support beam to form an integral structure between the wing wall and the support beam. Multiple drainage holes are set on the wing wall, with a preset distance between two adjacent drainage holes. By setting drainage holes, the drainage holes are used to drain water behind the culvert and reduce soil pressure.

[0061] It should be noted that the supporting beam is either a ring-shaped supporting beam 21 or a straight supporting beam 31, and the herringbone wall is either the first herringbone wall 11 or the second herringbone wall 12.

[0062] The preset value ranges from 20cm to 40cm. In this embodiment, the preset value is 30cm. That is to say, the wing wall is poured in two stages. The first stage is poured to 30cm below the support beam, and the second stage is poured together with the support beam so that the wing wall and the support beam form an integral structure.

[0063] For example, the diameter of the drain hole can be 5cm, but of course, the diameter of the drain hole can also be 6cm or 7cm.

[0064] S106. Fill with a layer of crushed stone, and lay geotextile on top of the crushed stone layer. The geotextile extends upward along the height of the fill and is closely attached to the wall body of the wing wall. The geotextile serves as an isolation layer to prevent the backfill soil from blocking the drainage holes of the wing wall.

[0065] Specifically, after the strength of the sloping wall and the supporting beam meets the requirements, the backfilling of the culvert is carried out. Before the backfilling of the culvert, a 500mm thick layer of crushed stone is first laid. The crushed stone layer is used for water filtration and can also be called a water filtration layer.

[0066] S107. Backfill the culvert back onto the geotextile.

[0067] Specifically, the backfill thickness shall be in accordance with the specifications, with each layer not exceeding 300mm. When it connects with the already filled roadbed, a 30*100cm (height*width) step shall be excavated at the junction with the roadbed. When compacting the wall, small compaction tools shall be used to prevent the compaction equipment from damaging the herringbone wall.

[0068] The construction method of the box culvert herringbone wall 1 provided in this application includes a box culvert herringbone wall 1 comprising a body 10, a first support component 20, and a second support component 30; a first herringbone wall 11 is provided at the first end of the body 10, and a second herringbone wall 12 is provided at the second end of the body 10; the first support component 20 is provided inside the first herringbone wall 11, the top end of the first support component 20 is connected to the inner wall of the first herringbone wall 11, and the bottom end of the first support component 20 is connected to the ground; a second support component 30 is provided inside the second herringbone wall 12. The top of the second support component 30 is connected to the inner wall of the second wing wall 12, and the bottom of the second support component 30 is connected to the ground. The construction steps are as follows: calculate the backfill soil pressure - design the structure of the support component - foundation construction - construction of support column 222 or support column 32 - construction of wing wall and support beam - laying of crushed stone layer and geotextile - backfilling construction of culvert back. By setting the first support component 20 and the second support component 30, the support components support the wing wall and prevent the wing wall from being damaged due to the backfilling of the culvert back.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0070] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A construction method for a box culvert's herringbone wall, characterized in that: The box culvert's scissor wall includes the main body, a first support component, and a second support component; A first V-shaped wall is provided at the first end of the main body, and a second V-shaped wall is provided at the second end of the main body. A first support component is provided inside the first V-shaped wall. The top end of the first support component is connected to the inner wall of the first V-shaped wall, and the bottom end of the first support component is connected to the ground. A second support component is provided inside the second V-shaped wall. The top end of the second support component is connected to the inner wall of the second V-shaped wall, and the bottom end of the second support component is connected to the ground. When the height of the first wing wall is greater than or equal to 10m, the support beam in the first support assembly adopts a ring support beam; When the height of the second V-shaped wall is less than 10m, the support beam in the second support assembly adopts a straight support beam; The first support component includes a ring support beam and a support unit. The ring support beam is adapted to the structure of the first wing wall. The ring support beam is disposed inside the first wing wall, and the opposite ends of the ring support beam are respectively connected to the two inner side walls of the first wing wall. The top of the support unit is connected to the bottom surface of the annular support beam, and the bottom of the support unit is connected to the ground. The support unit includes a connecting beam and two opposing support columns. The tops of the two support columns are connected to the bottom surface of the connecting beam, and the bottoms of the two support columns are connected to the ground. The side of the connecting beam away from the support columns is connected to the bottom surface of the annular support beam. The second support component includes a straight support beam and a support column. The straight support beam is disposed inside the second V-shaped wall, and the two ends of the straight support beam are respectively connected to the two opposite inner side walls of the second V-shaped wall through connecting plates. The top of the supporting column is connected to the bottom surface of the straight supporting beam, and the bottom end of the supporting column is connected to the bottom surface. The construction method includes the following steps: Calculate the backfill soil pressure behind the culvert; Structural design of the first and second support components; A foundation bearing capacity test is conducted on the locations of the first wing wall, the second wing wall, the first support component, and the second support component. If the foundation bearing capacity does not meet the design requirements, replacement or pile foundation treatment is adopted to make the foundation bearing capacity meet the requirements. If the foundation bearing capacity meets the design requirements, the foundation construction of the first wing wall, the second wing wall, the first support component, and the second support component is carried out on the foundation. The concrete for the support columns and / or support pillars is poured to a predetermined distance below the top of the column, and the remaining part is poured together with the annular support beam and / or the straight support beam. The wing wall is constructed according to the design drawings. The wing wall is poured in two stages. The first pouring stops at a preset value under the support beam. The second pouring is done together with the support beam to form an integral structure between the wing wall and the support beam. Multiple drainage holes are provided on the wing wall, with a preset distance between two adjacent drainage holes. A layer of crushed stone is filled in, and a geotextile is laid on top of the crushed stone layer. The geotextile extends upward along the height of the fill and is closely attached to the wall body of the slanted wall. Backfilling is carried out on the geotextile.

2. The construction method of the box culvert sloping wall according to claim 1, characterized in that: The calculation of backfill soil pressure behind the culvert includes: calculating the Coulomb soil pressure based on the backfill soil height; when the Coulomb soil pressure is greater than or equal to the shear resistance of the wing wall, setting up a support component inside the wing wall to resist the backfill soil pressure behind the culvert.

3. The construction method of the box culvert sloping wall according to claim 1, characterized in that: The structural design of the first support component and the second support component includes: determining the structure of the first support component according to the height of the first wing wall; when the highest point of the first wing wall exceeds 10m, it is designed as two support beams, and the two support beams are connected to form a ring support beam; when the span between the two support beams exceeds 8m, a support column is set under the support beam; when the highest point of the second wing wall is less than 10m, the support beam is a straight support beam, and the two ends of the straight support beam are respectively connected to the two opposite inner side walls of the second wing wall through connecting plates.

4. The construction method of the box culvert sloping wall according to claim 1, characterized in that: The ring-shaped support beam is trapezoidal.

5. The construction method of the box culvert sloping wall according to claim 1, characterized in that: The height of the first octagonal wall is greater than or equal to 10m.

6. The construction method of the box culvert sloping wall according to claim 1, characterized in that: The height of the second V-shaped wall is less than 10m.

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