A composite structure of drainage pipe foundation and construction method thereof

Abstract

The present invention provides a composite structure of a drainage pipe foundation and a construction method thereof, wherein the composite structure comprises a groove arranged along the laying direction of the drainage pipe, a cushion layer net is laid in the groove, the drainage pipe is arranged on the upper side of the cushion layer net, the cushion layer net is covered with a matrix body, the matrix body covers the drainage pipe, and the upper side of the matrix body is covered with a road surface layer. The composite structure and the construction method thereof can improve the strength of the drainage pipe foundation and improve the stability of the drainage pipe in long-term operation.

Description

Technical Field

[0001] The invention relates to the technical field of drainage pipe construction, and in particular to a composite framework of a drainage pipe foundation and a construction method thereof. Background Art

[0002] As an important infrastructure for transporting rainwater and sewage, drainage pipes are generally buried in the soil layer below the road. The soil layer, sand cushion layer, and covering layer around the drainage pipe constitute the foundation of the drainage pipe, and the stability of the foundation structure is crucial to the long-term effective operation of the drainage pipe. The quality of the soil layer has a great influence on the stability of the foundation. Soft soil layers with low strength, such as beach fill and silt soil, are not conducive to the stability of the foundation. Engineering construction generally replaces a part of the soil or sand and gravel with better strength to increase the structural strength of the soil layer. However, under the action of the load above the road surface, in long-term operation, the soft soil layer outside the foundation will penetrate the foundation formed by the replacement, gradually destroy the stability of the foundation, and then produce uneven settlement, resulting in diseases such as misalignment or fracture of the drainage pipe, affecting the normal operation of the drainage network. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a composite structure of a drainage pipe foundation and a construction method thereof, which can improve the strength of the drainage pipe foundation and improve the stability of the drainage pipe in long-term operation.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a composite structure of a drainage pipe foundation, including a groove arranged along the laying direction of the drainage pipe, a cushion net is laid in the groove, the drainage pipe is arranged on the upper side of the cushion net, the cushion net is covered with a matrix body, the matrix body covers the drainage pipe, and the upper side of the matrix body is covered with a pavement layer.

[0005] In a preferred embodiment, a plurality of support members are provided in the groove along its length direction, and the support members include a silt extrusion cavity, which is driven into the bottom of the groove, and a cavity filler is provided in the silt extrusion cavity. A pedestal is provided at the upper end of the silt extrusion cavity, and the upper side of the pedestal is flush with the bottom of the groove, and the lower side is provided with a splicing groove that engages with the silt extrusion cavity.

[0006] In a preferred solution, a foundation hook is embedded in the foundation, the upper end of the foundation hook extends out of the outside of the foundation, and the foundation hook and the cushion net are tied together by a steel wire rope.

[0007] In a preferred embodiment, the silt squeezing cavity is an inverted cone structure.

[0008] In a preferred solution, the pavement layer includes a structural skeleton and concrete wrapping the structural skeleton, the structural skeleton is arranged on the upper side of the matrix, and the end of the structural skeleton is inserted into the original structure of the pavement.

[0009] In a preferred embodiment, the structural skeleton includes transverse steel bars and longitudinal steel bars.

[0010] In a preferred solution, a connecting frame is provided between the pavement layer and the cushion layer net, and multiple groups of connecting frames are arranged along the length direction of the drainage pipe. Each group of connecting frames includes two connecting rods, and the two connecting rods are arranged on both sides of the drainage pipe. An upper curved hook and a lower curved hook are respectively provided at the upper and lower ends of the connecting rods. The upper curved hook is connected to the structural frame, and the lower curved hook is connected to the cushion layer net.

[0011] In a preferred embodiment, the matrix body includes a sand matrix arranged in a lower layer and a soil matrix covering an upper layer of the sand matrix.

[0012] The present invention also provides a construction method of a composite structure of a drainage pipe foundation, comprising the following steps:

[0013] S1. Delineate the scope of drainage pipe construction on the surface of the original road surface structure, divide the original road surface structure into a demolition area and a retention area, and after demolishing the original road surface structure in the demolition area, dig to the depth required for burying the drainage pipe to form a trench;

[0014] S2, driving the silt squeezing cavity into the bottom of the trench, and then filling the cavity filling material into the silt squeezing cavity, buckling the cap on the top of the driven silt squeezing cavity, and tamping the cap downwards so that the upper side of the cap is flush with the bottom of the trench;

[0015] S3. Cut the cushion layer mesh longitudinally. The transverse width of the cushion layer mesh after cutting is basically equivalent to the cross-sectional width of the bottom of the trench. Lay the cushion layer mesh along the bottom of the trench. Each cushion layer mesh is tied and anchored by steel wire to form a whole. The cap hook passes through from below and hooks the cushion layer mesh, and is tied and anchored by steel wire.

[0016] S4. The drainage pipes are placed on the cushion net and connected one section at a time along the grooves;

[0017] S5. The lower hook at the lower end of the connecting rod passes through and hooks the cushion net or the platform hook, and then is tied and anchored by steel wire;

[0018] S6. First fill in the sand matrix, the highest position of which is higher than the top of the drainage pipe, and then fill in the soil matrix until the elevation of the new road structure to be poured, and compact it to form a matrix body;

[0019] S7. The structural skeleton is suspended above the matrix body, the ends of the transverse steel bars in the matrix body are inserted into the original structure of the pavement, and concrete is poured to cover the structural skeleton and the matrix body to form a new pavement structure.

[0020] The present invention provides a composite structure of a drainage pipe foundation and a construction method thereof. The composite structure and the construction method thereof utilize support members to stabilize the soil layer at the bottom of the trench, connect the structural skeleton, cushioning net, and support members of the pavement structure through a connecting frame to form a stable three-dimensional structure, fill in a covering matrix and compact it, thereby reducing damage to the drainage pipe caused by uneven settlement of the foundation. The construction is simple and fast, the foundation structure is good, the strength of the drainage pipe foundation can be improved, and the stability of the drainage pipe in long-term operation can be improved, and the composite structure and the construction method thereof have a high industrial utilization value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 It is a schematic cross-sectional view along the groove of the present invention;

[0023] Figure 2 It is a schematic cross-sectional view of the present invention;

[0024] Figure 3 is a schematic diagram of the groove structure;

[0025] Figure 4 is a structural schematic diagram of a connecting frame;

[0026] Figure 5 is a schematic diagram of the structure of the support member;

[0027] In the figure: drainage pipe 1, connecting frame 2, road surface layer 3, cushion net 4, support member 5, matrix body 6, groove 7, original road surface structure 8, connecting rod 201, upper hook 202, lower hook 203, structural skeleton 301, concrete 302, silt squeezing cavity 501, cavity filler 502, cap 503, splicing groove 504, cap hook 505, sand matrix 601, soil matrix 602. DETAILED DESCRIPTION

[0028] like Figures 1 to 3 As shown, a composite structure of a drainage pipe foundation includes a groove 7 arranged along the laying direction of the drainage pipe 1. The cross section of the groove 7 is generally a trapezoid with a large mouth and a small bottom, or a rectangle with a mouth and a bottom of the same size. Both sides of the mouth of the groove 7 are reserved areas of the original road surface structure; the side walls of the groove 7 and the bottom of the groove 7 are generally the original soil layer.

[0029] The cushion net 4 is laid in the groove 7, and the cushion net 4 is generally in the shape of a rectangular sheet. During on-site construction, the cushion net is cut longitudinally, and the transverse width of the cushion net after cutting is basically equivalent to the cross-sectional width of the groove bottom. The cushion net is laid along the bottom of the groove, and each cushion net is tied and anchored by steel wire to form a whole.

[0030] The drainage pipe 1 is arranged on the upper side of the cushion net 4 , and the drainage pipe 1 is connected in sequence along the groove 7 section by section.

[0031] The cushion layer net 4 is covered with a matrix body 6 , the matrix body 6 covers the drainage pipe 1 , and the upper side of the matrix body 6 covers the pavement layer 3 .

[0032] Preferably, the matrix body 6 includes a sand matrix 601 disposed at the bottom layer and a soil matrix 602 covering the upper layer of the sand matrix 601. The sand matrix can generally be medium-coarse sand, and the soil matrix can generally be cultivated soil.

[0033] After the drainage pipe 1 is installed on the cushion net 4, the sand matrix 601 is first filled in. Generally, after it exceeds the top of the drainage pipe 1 by 30 cm, the soil matrix 602 is then filled in until the elevation of the new road surface structure to be poured. After the sand matrix and soil matrix are filled in, they are compacted to a compaction degree of not less than 0.85 to form a covering matrix body.

[0034] Preferably, a plurality of support members 5 are provided in the groove 7 along its length direction, and the support member 5 includes a silt-extrusion cavity 501. The silt-extrusion cavity 501 is generally in the shape of an inverted cone with a hollow interior. The height, bottom diameter and thickness thereof can be determined according to the requirements of silt-extrusion reinforcement of the groove foundation. The height is generally greater than 1.0 m, the upper end diameter is generally greater than 0.2 m, and the thickness is generally about 5 mm. It can be prefabricated using plastic material.

[0035] The silt-squeezing cavity 501 is driven into the bottom of the groove 7. A cavity filler 502 is provided in the silt-squeezing cavity 501. The cavity filler 502 is generally concrete, which is prefabricated in a factory or poured into the silt-squeezing cavity 501 on site. The shape is generally conical. If it is a prefabricated part, the height and diameter specifications need to be slightly smaller than the height and diameter of the silt-squeezing cavity 501 so as to fit closely with the silt-squeezing cavity 501.

[0036] A cap 503 is provided at the upper end of the silt squeezing cavity 501. The cap 503 is generally prefabricated with concrete and presents a brick shape. A joint groove 504 is provided on the lower bottom surface thereof, and a cap hook 505 is provided on the top. The diameter of the joint groove 504 is slightly larger than the diameter of the top of the silt squeezing cavity 501. The depth of the joint groove 504 is at least greater than 10 cm, so that the silt squeezing cavity 501 and the joint groove 504 are easy to engage.

[0037] When the pedestal 503 is prefabricated, at least two steel bars with a diameter greater than 10 mm are inserted vertically, and the steel bar heads are exposed at the upper end. The steel bar heads are bent to form pedestal hooks 505, and the pedestal hooks 505 are tied to the cushion net 4 by steel wire ropes.

[0038] Generally, the silt-squeezing cavity 501 is driven into the bottom of the groove 7, and then concrete is poured into the silt-squeezing cavity 501 to form the cavity filling material 502; or the prefabricated cavity filling material 502 is directly driven into the silt-squeezing cavity 501; the amount of driving is generally such that the bottom of the groove 7 does not deform after the load is applied. The cap 503 is buckled on the top of the driven silt-squeezing cavity 501; the cap 503 is tamped down so that the top of the cap 503 is flush with the bottom of the groove 7.

[0039] The pavement layer 3 includes a structural skeleton 301 and concrete 302 wrapping the structural skeleton 301, the thickness of which is generally greater than 5 cm, the structural skeleton 301 is arranged on the upper side of the matrix body 6, the structural skeleton 301 includes transverse steel bars and longitudinal steel bars, which are generally formed by steel bars with a diameter greater than 10 mm tied in a field shape in the vertical and horizontal directions, and the spacing between two connected steel bars can generally be set at about 20 cm, forming a rectangular hole with a side length of 20 cm. The end of the structural skeleton 301 is inserted into the original structure 8 of the pavement.

[0040] Preferably, a connecting frame 2 is provided between the pavement layer 3 and the cushion net 4, and multiple groups of connecting frames 2 are arranged along the length direction of the drainage pipe 1. Each group of connecting frames 2 includes two connecting rods 201. The two connecting rods 201 are arranged on both sides of the drainage pipe 1. The upper and lower ends of the connecting rods 201 are respectively provided with upper curved hooks 202 and lower curved hooks 203. The upper curved hooks 202 are connected to the structural frame 301, and the lower curved hooks 203 are connected to the cushion net 4.

[0041] The connecting frame 2 is generally made of steel bars, the diameter of which is generally greater than 10 mm, and the surface is coated with an anti-corrosion coating. An upper hook 202 and a lower hook 203 are provided at the upper and lower ends of a single connecting rod 201, and the length of the connecting rod 201 is generally determined according to the depth of the groove 7. The connecting frame 2 is generally installed in groups, each group is two connecting rods 201, and the distance between the two connecting rods is slightly greater than the diameter of the drain pipe 1, and is placed on both sides of the drain pipe 1; generally, one group of connecting frames 2 is installed at the connection of two sections of the drain pipe 1 and in the middle of the drain pipe 1.

[0042] A construction method for a composite structure of a drainage pipe foundation comprises the following steps:

[0043] S1. Delineate the scope of drainage pipe construction on the surface of the original road surface structure 8, divide the original road surface structure 8 into a demolition area and a retention area, and after demolishing the original road surface structure 8 in the demolition area, dig to the depth required for burying the drainage pipe 1 to form a groove 7. The cross section of the groove 7 is generally a trapezoid with a large mouth and a small bottom, or a rectangle with the mouth and the bottom being of the same size. Both sides of the mouth of the groove 7 are the retention areas of the original road surface structure; the groove wall and the groove bottom are generally the original soil layer.

[0044] S2. Drive the silt-extruding cavity 501 into the bottom of the groove 7, then fill the cavity filler 502 into the silt-extruding cavity 501, buckle the base 503 on the top of the driven silt-extruding cavity 501, and tamp the base 503 downwards so that the upper side of the base 503 is flush with the bottom of the groove 7.

[0045] S3, longitudinally cut the cushion net 4, the transverse width of the cushion net 4 after cutting is basically equivalent to the cross-sectional width of the bottom of the groove 7, lay the cushion net 4 along the bottom of the groove 7, each cushion net 4 is tied and anchored by steel wire to form a whole, the base hook 505 passes through from below and hooks the cushion net 4, and is tied and anchored by steel wire.

[0046] S4. The drainage pipe 1 is placed on the cushion net 4 and connected in sequence along the groove 7 section by section.

[0047] S5. The lower hook 203 at the lower end of the connecting rod 201 passes through and hooks the cushion net 4 or the platform hook 505, and then is tied and anchored by steel wire.

[0048] S6. First fill in the sand matrix 601, the highest position of the sand matrix 601 is higher than the top of the drainage pipe 1, and then fill in the soil matrix 602 until the elevation of the new road surface structure to be poured, and tamp to form a matrix body 6.

[0049] S7, the structural skeleton 301 is suspended above the matrix 6, the ends of the transverse steel bars in the structural skeleton 301 are inserted into the original pavement structure 8, and concrete 302 is poured to cover the structural skeleton 301 and the matrix 6 to form a new pavement structure.

[0050] This composite structure uses supports to stabilize the soil layer at the bottom of the trench, and connects the structural skeleton, cushion net and supports of the pavement structure through a connecting frame to form a stable three-dimensional structure. The covering matrix is ​​filled in and compacted, which can reduce the damage to the drainage pipe caused by uneven settlement of the foundation. The construction is simple and fast, and the basic structure is good. It can enhance the strength of the drainage pipe foundation and improve the stability of the drainage pipe in long-term operation, and has a high industrial utilization value.

Claims

1. A composite structure of a drainage pipe foundation, characterized in that: The invention comprises a groove (7) arranged along the laying direction of a drainage pipe (1), a cushion net (4) is laid in the groove (7), the drainage pipe (1) is arranged on the upper side of the cushion net (4), a matrix body (6) is covered on the cushion net (4), the matrix body (6) covers the drainage pipe (1), and a pavement layer (3) is covered on the upper side of the matrix body (6), the pavement layer (3) comprises a structural frame (301) and concrete (302) wrapping the structural frame (301), the structural frame (301) is arranged on the upper side of the matrix body (6), and the end of the structural frame (301) is inserted into the original pavement structure (8), and a connecting frame (2) is arranged between the pavement layer (3) and the cushion net (4), and a plurality of connecting frames (2) are arranged along the length direction of the drainage pipe (1), and each group of connecting frames (2) comprises two connecting rods (201), and the two connecting rods (201) are arranged on both sides of the drainage pipe (1), and the connecting rods (201) are arranged on both sides of the drainage pipe (1). 1) An upper hook (202) and a lower hook (203) are respectively provided at the upper and lower ends, the upper hook (202) is connected to the structural frame (301), and the lower hook (203) is connected to the cushion layer net (4); a plurality of support members (5) are provided in the groove (7) along its length direction, the support member (5) comprises a silt squeezing cavity (501), the silt squeezing cavity (501) is driven into the bottom of the groove (7), and a cavity filling material is provided in the silt squeezing cavity (501). The silt squeezing cavity (501) is provided with a support (503) at the upper end thereof, the upper side of the support (503) being flush with the bottom of the groove (7), and the lower side thereof being provided with a joint groove (504) engaged with the silt squeezing cavity (501), a support hook (505) being embedded in the support (503), the upper end of the support hook (505) extending out of the outside of the support (503), and the support hook (505) being tied to the cushion layer net (4) by means of a steel wire rope.

2. A composite structure of a drainage pipe foundation according to claim 1, characterized in that: The silt squeezing cavity (501) is an inverted cone-shaped structure.

3. A composite structure of a drainage pipe foundation according to claim 1, characterized in that: The structural frame (301) comprises transverse steel bars and longitudinal steel bars.

4. A composite structure of a drainage pipe foundation according to claim 3, characterized in that: The matrix body (6) comprises a sand matrix (601) arranged at a lower layer and a soil matrix (602) covering the upper layer of the sand matrix (601).

5. The construction method of a composite structure of a drainage pipe foundation according to claim 4, characterized in that: The steps include: S1. Delineating the scope of drainage pipe construction on the surface of the original road surface structure (8), dividing the original road surface structure (8) into a demolition area and a retention area, and after demolishing the original road surface structure (8) in the demolition area, digging to the depth required for burying the drainage pipe (1) to form a trench (7); S2, driving the silt squeezing cavity (501) into the bottom of the groove (7), then filling the silt squeezing cavity (501) with a cavity filler (502), buckling a support (503) on the top of the driven silt squeezing cavity (501), and tamping the support (503) downwards so that the upper side of the support (503) is flush with the bottom of the groove (7); S3, longitudinally cutting the cushion layer net (4), wherein the transverse width of the cushion layer net (4) after cutting is substantially equal to the cross-sectional width of the bottom of the groove (7), laying the cushion layer net (4) along the bottom of the groove (7), and tying and anchoring each piece of cushion layer net (4) with steel wires to form a whole, and the platform hook (505) passes through from below and hooks the cushion layer net (4), and ties and anchors it with steel wires; S4, the drainage pipe (1) is placed on the cushion net (4), and is connected in sequence along the groove (7) section by section; S5, the lower hook (203) at the lower end of the connecting rod (201) passes through and hooks the cushion layer net (4) or the platform hook (505) from above, and then is tied and anchored by steel wire; S6, first fill in the sand matrix (601), the highest position of the sand matrix (601) is higher than the top of the drainage pipe (1), and then fill in the soil matrix (602) until the elevation of the new road surface structure to be poured, and tamp to form a matrix body (6); S7, the structural skeleton (301) is suspended above the matrix (6), the ends of the transverse steel bars in the structural skeleton (301) are inserted into the original pavement structure (8), and concrete (302) is poured to cover the structural skeleton (301) and the matrix (6), thereby forming a new pavement structure.

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