Prefabricated box culvert and cast-in-place box culvert connecting structure

Abstract

The utility model discloses a connecting structure of a prefabricated box culvert and a cast-in-place box culvert, which belongs to the technical field of design and construction of water intake engineering and comprises the prefabricated box culvert, the cast-in-place box culvert, a U-shaped groove and a T-shaped prefabricated plate, and the U-shaped groove and the T-shaped prefabricated plate are used for connecting the prefabricated box culvert and the cast-in-place box culvert. An inverted trapezoidal bulge is arranged at the center line of the lower surface of the T-shaped precast slab; the prefabricated box culverts and the cast-in-place box culverts are erected in the U-shaped grooves correspondingly, the T-shaped prefabricated slabs are inserted into the joints, and rubber pads are arranged between the contact surfaces of the T-shaped prefabricated slabs and the box culverts; a full-length embedded part is vertically pre-embedded in a port of the side wall of the splicing end of the prefabricated box culvert and the cast-in-place box culvert; full-length steel plates are welded to full-length embedded parts, corresponding to the prefabricated box culvert and the cast-in-place box culvert, of the prefabricated box culvert and the cast-in-place box culvert, fine aggregate concrete is filled between the full-length steel plates and between the full-length steel plates and the side face of the U-shaped groove, and fine aggregate concrete layers are arranged on the outer sides of the T-shaped prefabricated plate and the U-shaped groove. The advantages of the prefabricated box culvert in water area construction and the advantages of the cast-in-place box culvert in land area construction can be exerted, the construction efficiency is improved, and the construction cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of water intake engineering design and construction, in particular to a connection structure of a prefabricated box culvert and a cast-in-place box culvert. Background Art

[0002] With the development of seawater utilization projects, new seawater desalination projects and seawater cooling projects have increased rapidly, and the supporting seawater water intake projects are increasing. Seawater water intake structures generally adopt open channels, steel pipes, box culverts and other forms. Box culverts are widely used in water intake projects because of their advantages such as convenient construction, low cost, stable structure, simple form, high strength, good durability, and strong adaptability to uneven foundation settlement. Due to the difficulty of supporting formwork, the difficulty of casting in place, and the high cost of cofferdams, box culverts located in water areas generally adopt prefabricated hoisting solutions; in land areas, box culverts generally adopt large excavation cast-in-place solutions. It is very necessary to ensure that the connection between the prefabricated box culvert and the cast-in-place box culvert is stable, leak-proof, and free of sediment. At present, there is no standardized connection structure between prefabricated box culverts and cast-in-place box culverts in water intake projects. In actual projects, the same project generally adopts a single cast-in-place or prefabricated solution. Therefore, a more reliable connection structure between prefabricated box culverts and cast-in-place box culverts is needed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a connection structure between a prefabricated box culvert and a cast-in-place box culvert, which can give full play to the respective advantages of the prefabricated box culvert in water construction and the cast-in-place box culvert in land construction, improve construction efficiency and save engineering costs.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A prefabricated box culvert and a cast-in-place box culvert connection structure, comprising a prefabricated box culvert arranged in a water area, a cast-in-place box culvert arranged in a land area, a U-shaped groove and a T-shaped prefabricated plate for connecting the prefabricated box culvert and the cast-in-place box culvert;

[0006] The U-shaped groove comprises a bottom surface and a side surface, and a rubber pad is arranged above the bottom surface;

[0007] An inverted trapezoidal protrusion is provided at the midline of the lower surface of the T-shaped prefabricated plate;

[0008] The prefabricated box culvert and the cast-in-place box culvert are respectively erected in the U-shaped groove, and T-shaped prefabricated plates are inserted at the joints, and rubber pads are arranged between the contact surfaces of the T-shaped prefabricated plates and the box culvert; full-length embedded parts are vertically pre-embedded at the side wall ports of the spliced ​​ends of the prefabricated box culvert and the cast-in-place box culvert; full-length steel plates are welded on the full-length embedded parts corresponding to the prefabricated box culvert and the cast-in-place box culvert, and fine stone concrete is filled between the full-length steel plates and between the full-length steel plates and the sides of the U-shaped groove, and a fine stone concrete layer is arranged between the T-shaped prefabricated plates and the outer sides of the U-shaped grooves.

[0009] A further improvement of the technical solution of the utility model is that the top of the side of the U-shaped groove exceeds the top of the box culvert plate, the bottom length is 1900-2500mm, and the bottom width is 200mm greater than the box culvert width.

[0010] A further improvement of the technical solution of the utility model is that the thickness of the rubber pad ranges from 20 to 30 mm.

[0011] A further improvement of the technical solution of the utility model is that the length of the contact position between the prefabricated box culvert cast-in-situ box culvert and the U-shaped groove 1 is 800-1000 mm, and the joint width is 300-400 mm.

[0012] A further improvement of the technical solution of the utility model is that the width of the through-length embedded part is 50-100 mm, and the length is the same as the height of the box culvert.

[0013] A further improvement of the technical solution of the utility model is that the thickness of the full-length steel plate is 10 mm.

[0014] A further improvement of the technical solution of the utility model is that: a plurality of lifting rings are evenly arranged on the T-shaped prefabricated plate, and the bottom of the lifting rings is pre-buried in the T-shaped prefabricated plate.

[0015] A further improvement of the technical solution of the utility model is that the upper base length of the inverted trapezoidal protrusion is 200 mm, and the lower base length is the same as the joint width.

[0016] Due to the adoption of the above technical solution, the technical progress achieved by the utility model is:

[0017] The utility model designs a connection structure between a prefabricated box culvert and a cast-in-place box culvert, which can ensure that the overall strength of the connection is high, water-tight, and sand-free, and the prefabricated section and the cast-in-place section are overlapped in a complete component, and there will be no uneven settlement at the connection. As a result, the water intake box culvert can adopt a combination of prefabrication and cast-in-place in the same project, giving full play to the respective advantages of prefabricated box culverts in water construction and cast-in-place box culverts in land construction, improving construction efficiency and saving engineering costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the U-shaped groove in the utility model;

[0019] Figure 2 It is a structural diagram of the connection between the prefabricated box culvert and the cast-in-place box culvert in the utility model;

[0020] Figure 3 It is a plane diagram of the connection between the prefabricated box culvert and the cast-in-place box culvert in the utility model;

[0021] Figure 4 It is a cross-sectional view of the connection between the prefabricated box culvert and the cast-in-place box culvert in the utility model;

[0022] Figure 5 It is a plan view of the T-shaped prefabricated board in the utility model;

[0023] Figure 6 It is a cross-sectional view of a T-shaped prefabricated board in the utility model;

[0024] Figure 7 It is a schematic diagram of the T-shaped prefabricated plate lifting ring in the utility model;

[0025] Among them, 1. U-shaped groove, 2. rubber pad, 3. box culvert, 4. plain concrete cushion, 5. full-length embedded parts, 6. full-length steel plate, 7. fine stone concrete, 8. T-shaped precast plate, 9. lifting ring. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below with reference to the accompanying drawings and embodiments:

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" ... etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] A prefabricated box culvert and a cast-in-place box culvert connection structure, comprising a prefabricated box culvert 3 arranged in a water area, a cast-in-place box culvert 3 arranged in a land area, a U-shaped trough 1 and a T-shaped prefabricated plate 8 for connecting the prefabricated box culvert 3 and the cast-in-place box culvert 3;

[0030] like Figure 1 As shown, the U-shaped trough 1 is a cast-in-place reinforced concrete structure, including a bottom surface and a side surface, a plain concrete cushion layer 4 is arranged below the bottom surface, a rubber pad 2 is arranged above the bottom surface, and the thickness of the rubber pad 2 ranges from 20 to 30 mm; the inner edge of the side surface exceeds the outer edge of the box culvert 3 by 100 mm, and the top of the side surface exceeds the top of the top plate of the box culvert 3, so as to meet the thickness of the T-shaped prefabricated plate 8 and the post-cast fine stone concrete 77, and the width is 1900 to 2500 mm;

[0031] like Figure 2 , 3 As shown in Figures 4 and 5, the prefabricated box culvert 3 and the cast-in-place box culvert 3 are respectively erected in the U-shaped groove 1, and the length of contact with the U-shaped groove 1 is 800-1000mm. The erection positions are all assembled ends, and the spacing between the spliced ​​ends is 300-400mm. A T-shaped prefabricated plate 8 is arranged at the joint of the two assembled ends, and a rubber pad 2 is arranged between the T-shaped prefabricated plate 8 and the contact surface of the box culvert 3; a full-length embedded part 5 is vertically pre-embedded at the side wall port of the spliced ​​end of the prefabricated box culvert 3 and the cast-in-place box culvert 3. The width of the full-length embedded part 5 is 50-100mm, and the length is the same as the height of the box culvert 3; a 10mm thick full-length steel plate 6 is welded on the full-length embedded parts 5 corresponding to the prefabricated box culvert 3 and the cast-in-place box culvert 3, and fine stone concrete 7 is poured between the full-length steel plates 6 and between the full-length steel plates 6 and the side of the U-shaped groove 1, and 7 layers of fine stone concrete are arranged between the T-shaped prefabricated plate 8 and the outer side of the U-shaped groove 1.

[0032] like Figure 5 , 6 As shown in 7, a plurality of lifting rings 9 are evenly arranged on the T-shaped prefabricated plate 8, the bottom of the lifting ring 9 is pre-buried in the T-shaped prefabricated plate 8, and an inverted trapezoidal protrusion is arranged at the midline of the lower surface of the T-shaped prefabricated plate 8, the upper bottom length is 200mm, and the lower bottom length is the same as the spacing between the splicing ends of the cast-in-place box culvert 3. A method for connecting a prefabricated box culvert with a cast-in-place box culvert comprises the following steps:

[0033] S1. The box culvert 3 in the water area adopts prefabricated hoisting underwater construction, and the box culvert 3 on land adopts large excavation cast-in-place construction;

[0034] The box culvert 3 in the S11 water area is constructed by prefabrication and hoisting underwater;

[0035] First, the box culvert is prefabricated in three sections in the prefabrication site. After the strength reaches the required level, it is floated to the installation site, hoisted above water, and installed underwater to the predetermined position.

[0036] The box culvert 3 in the S12 land area adopts large excavation and cast-in-place construction;

[0037] Excavate the foundation pit, level the bottom surface, pour the cushion layer, tie the steel bars, and pour the concrete; construct the box culvert 3 in the water area from the water intake to the land, and construct the box culvert 3 in the land area from the land to the water area. The construction of the last section of the prefabricated box culvert 3 and the cast-in-place box culvert 3 at the connection is suspended.

[0038] S2, make a U-shaped groove 1, and lay a rubber pad 2 on the top of the bottom plate of the U-shaped groove 1;

[0039] The U-shaped groove 1 is a joint support structure, one end of which overlaps the assembly joint of the prefabricated box culvert 3, and the other end overlaps the cast-in-place box culvert 3, wrapping the joint to ensure that the joint has sufficient strength and can effectively avoid uneven settlement of the box culvert 3 on both sides of the joint.

[0040] S3, making the splicing end of the prefabricated box culvert 3, the cast-in-place box culvert 3 and the U-shaped channel 1;

[0041] like Figure 2 , 3 As shown in , 4, a through-length embedded part 5 is embedded in the side wall position of the splicing end of the prefabricated box culvert 3 and the cast-in-place box culvert 3. The width of the through-length embedded part 5 is 50-100mm, and the length is the same as the length of the box culvert 3; the splicing ends of the prefabricated box culvert 3 and the cast-in-place box culvert 3 are respectively laid on the U-shaped groove 1, the contact length with the U-shaped groove 1 is 800-1000mm, and the spacing between the splicing ends is 300-400mm. After installation, a 10mm thick through-length steel plate 6 is welded to the through-length embedded parts 5 corresponding to the prefabricated box culvert 3 and the cast-in-place box culvert 3, and the through-length steel plate 6 is used for pouring fine stone concrete 7.

[0042] S4, install T-shaped prefabricated plate 8, pour fine stone concrete 7 to fix the joints between U-shaped trough 1 and prefabricated box culvert 3 and cast-in-place box culvert 3;

[0043] like Figure 5 , 6 As shown in , 7, after laying the rubber pad 2 at the contact position between the top of the box culvert 3 and the T-shaped precast plate 8, the T-shaped precast plate 8 is hoisted and installed at the joint of the box culvert 3, that is, between the two full-length steel plates 6. After the T-shaped precast plate 8 is installed in place, fine stone concrete 7 is poured to seal the joint as a whole.

[0044] In summary, the utility model can give full play to the respective advantages of prefabricated box culvert construction in water areas and cast-in-place box culvert construction in land areas, improve construction efficiency and save project costs.

Claims

1. A prefabricated box culvert and a cast-in-place box culvert connection structure, characterized in that: It comprises a prefabricated box culvert (3) arranged in a water area, a cast box culvert (3) arranged in a land area, a U-shaped trough (1) and a T-shaped prefabricated plate (8) for connecting the prefabricated box culvert (3) and the cast box culvert (3); The U-shaped groove (1) comprises a bottom surface and a side surface, and a rubber pad (2) is arranged above the bottom surface; An inverted trapezoidal protrusion is provided at the midline of the lower surface of the T-shaped prefabricated plate (8); The prefabricated box culvert (3) and the cast-in-place box culvert (3) are respectively erected in the U-shaped groove (1), and a T-shaped prefabricated plate (8) is inserted at the joint, and a rubber pad (2) is arranged between the contact surface of the T-shaped prefabricated plate (8) and the box culvert (3); a full-length embedded part (5) is vertically pre-embedded at the side wall port of the spliced ​​end of the prefabricated box culvert (3) and the cast-in-place box culvert (3); a full-length steel plate (6) is welded to the full-length embedded parts (5) corresponding to the prefabricated box culvert (3) and the cast-in-place box culvert (3), and fine stone concrete (7) is filled between the full-length steel plates (6) and between the full-length steel plates (6) and the side of the U-shaped groove (1), and a layer of fine stone concrete (7) is arranged outside the T-shaped prefabricated plate (8) and the U-shaped groove (1).

2. The prefabricated box culvert and cast-in-place box culvert connection structure according to claim 1 is characterized in that: The top of the side of the U-shaped groove (1) exceeds the top of the box culvert (3) plate, the bottom length is 1900-2500 mm, and the bottom width is 200 mm greater than the width of the box culvert (3).

3. The prefabricated box culvert and cast-in-place box culvert connection structure according to claim 1 is characterized in that: The thickness of the rubber pad (2) ranges from 20 to 30 mm.

4. The prefabricated box culvert and cast-in-place box culvert connection structure according to claim 1 is characterized in that: The length of the contact position between the prefabricated box culvert (3) and the cast-in-situ box culvert (3) and the U-shaped trough (1) is 800-1000 mm, and the width of the joint is 300-400 mm.

5. The prefabricated box culvert and cast-in-place box culvert connection structure according to claim 1 is characterized in that: The through-length embedded part (5) has a width of 50 to 100 mm and a length that is the same as the height of the box culvert (3).

6. The prefabricated box culvert and cast-in-place box culvert connection structure according to claim 1 is characterized in that: The thickness of the full-length steel plate (6) is 10 mm.

7. The prefabricated box culvert and cast-in-place box culvert connection structure according to claim 1 is characterized in that: A plurality of lifting rings (9) are evenly arranged on the T-shaped prefabricated plate (8), and the bottom of the lifting rings (9) is pre-buried in the T-shaped prefabricated plate (8).

8. The prefabricated box culvert and cast-in-place box culvert connection structure according to claim 1 is characterized in that: The upper base length of the inverted trapezoidal protrusion is 200 mm, and the lower base length is the same as the joint width.

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