Prefabricated slab pile box culvert with rapid construction

Abstract

The utility model discloses a prefabricated slab pile box culvert of quick construction, including main stress stake, connecting board stake, tie beam, crown beam, box culvert bottom plate and box culvert top board, the main stress stake is divided into two rows according to box culvert design width, and two rows of main stress stake are respectively at the position of box culvert two side walls and are vertically inserted on the foundation with equal interval distribution, the length of main stress stake is greater than the height of box culvert, and its top elevation is controlled according to box culvert design top elevation, the both sides of main stress stake are provided with vertical recess, and connecting board stake is vertically inserted between two adjacent main stress stakes of the same row along the longitudinal direction of box culvert.

Description

Technical Field

[0001] This utility model belongs to the field of box culvert construction technology, and in particular relates to a precast sheet pile box culvert that can be constructed quickly. Background Technology

[0002] River embankment projects often require drainage culverts along the riverbanks due to the need for drainage downstream. Currently, most drainage culverts are cast-in-place rectangular concrete culverts. However, for embankments with high groundwater levels, the foundations are prone to soft soil due to long-term soaking. Existing solutions mainly involve treating the foundation with replacement or pile foundations before pouring the superstructure culvert, which is not only time-consuming but also expensive. Current culvert construction generally employs open-cut excavation techniques. For culverts on soft soil foundations, due to the high water content of the foundation soil, the slope needs to be increased to at least 1:2, and the opening width of the culvert construction area can reach 15m-20m or more, resulting in a large amount of excavation work. In some areas where the excavation range is limited by surrounding buildings, steel sheet pile support is required for construction. Utility Model Content

[0003] In view of the problems existing in the prior art, the purpose of this utility model is to provide a precast sheet pile box culvert that can be constructed quickly.

[0004] To solve the above problems, the present invention adopts the following technical solution: A precast sheet pile box culvert for rapid construction includes main load-bearing piles, connecting sheet piles, tie beams, cap beams, a bottom slab, and a top slab. The main load-bearing piles are arranged in two rows according to the designed width of the box culvert. The two rows of main load-bearing piles are vertically inserted into the foundation at equal intervals on both sides of the box culvert. The length of each main load-bearing pile is greater than the height of the box culvert, and its top elevation is controlled according to the designed top elevation of the box culvert. Vertical grooves are provided on both sides of each main load-bearing pile. The connecting sheet piles are vertically inserted along the longitudinal direction of the box culvert between two adjacent main load-bearing piles in the same row, with their ends inserted into… Within the grooves of the two main load-bearing piles, the height of the connecting sheet piles is greater than the height of the box culvert, and its top is flush with the top of the main load-bearing piles. The tie beams are laterally abutted between two adjacent main load-bearing piles in different rows below the designed bottom elevation of the box culvert. The capping beams are longitudinally connected along the box culvert to the tops of the main load-bearing piles and the connecting sheet piles in the same row, connecting the main load-bearing piles and the connecting sheet piles into a whole to form the side walls of the box culvert. The area between the tie beams is filled with foundation backfill material. The bottom plate of the box culvert is laid on the surface of the tie beams and the foundation backfill material. The top plate of the box culvert covers the top of the capping beams of the two rows of box culvert side walls.

[0005] Preferably, the length of the main load-bearing pile is not less than 3 to 4 times the height of the box culvert, and the length of the main load-bearing pile located below the design bottom elevation of the box culvert is 2 to 3 times the height of the box culvert.

[0006] Preferably, the length of the connecting sheet pile is 2 to 3 times the height of the box culvert.

[0007] Preferably, the spacing between the main load-bearing piles in the same row is 1m.

[0008] Preferably, a water-stopping device is provided between the groove of the main load-bearing pile and the connecting sheet pile.

[0009] Preferably, a water-stopping device is provided between the bottom plate of the box culvert and the side wall of the box culvert.

[0010] Preferably, the main load-bearing piles and connecting sheet piles are precast reinforced concrete components.

[0011] The beneficial effects of this utility model are: Compared with existing technologies, the advantages of this utility model are: This utility model uses main load-bearing piles and connecting sheet piles as the sidewalls of the box culvert, which can complete the construction of the sidewalls of the box culvert without excavation. At the same time, the main load-bearing piles and connecting sheet piles can also serve as slope protection, which facilitates the construction of the bottom slab of the box culvert. Compared with the traditional solution, it speeds up the construction progress of the box culvert, reduces the amount of earthwork excavation, and also saves investment in foundation treatment. Attached Figure Description

[0012] Figure 1 This is a cross-sectional schematic diagram of the present invention; Figure 2 This is a bottom plan view of the present invention; Figure 3 This is a longitudinal sectional view of the present invention.

[0013] In the diagram: 1. Main load-bearing pile; 11. Groove; 2. Connecting sheet pile; 3. Tie beam; 4. Cap beam; 5. Box culvert bottom slab; 6. Box culvert top slab; 7. Foundation backfill. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] like Figures 1-3As shown, this utility model provides a technical solution: a precast sheet pile box culvert for rapid construction, including main load-bearing piles 1, connecting sheet piles 2, tie beams 3, cap beams 4, box culvert bottom slab 5, and box culvert top slab 6. The main load-bearing piles 1 and connecting sheet piles 2 are precast reinforced concrete components. The main load-bearing piles 1 are divided into two rows according to the design width of the box culvert. The two rows of main load-bearing piles 1 are vertically inserted into the foundation at equal intervals on both sides of the box culvert. The spacing between the main load-bearing piles 1 in the same row is 1m. The length of the main load-bearing piles 1 is not less than 3 to 4 times the height of the box culvert, and its top elevation is controlled according to the design top elevation of the box culvert. The length of the main load-bearing piles 1 located below the design bottom elevation of the box culvert is 2 to 3 times the height of the box culvert. Vertical grooves 11 are provided on both sides of the main load-bearing piles 1. The connecting sheet piles 2 are vertically inserted along the longitudinal direction of the box culvert into adjacent main load-bearing piles in the same row. Between piles 1, the two ends of the connecting sheet pile 2 are respectively inserted into the grooves 11 of the two main load-bearing piles 1. A water-stopping device is provided between the grooves 11 of the main load-bearing piles 1 and the connecting sheet pile 2. The length of the connecting sheet pile 2 is 2 to 3 times the height of the box culvert, and its top is flush with the top of the main load-bearing pile 1. The tie beam 3 is horizontally abutted between two adjacent main load-bearing piles 1 in different rows below the design bottom elevation of the box culvert. The cap beam 4 is longitudinally connected to the top of the main load-bearing piles 1 and the connecting sheet pile 2 in the same row, connecting the main load-bearing piles 1 and the connecting sheet pile 2 into a whole to form the side wall of the box culvert. The area between the tie beams 3 is filled with foundation backfill material 7. The bottom plate 5 of the box culvert is laid on the surface of the tie beam 3 and the foundation backfill material 7. A water-stopping device is provided between the bottom plate 5 of the box culvert and the side wall of the box culvert. The top plate 6 of the box culvert covers the top of the cap beam 4 of the two rows of side walls of the box culvert.

[0016] During construction of this precast sheet pile box culvert, two rows of precast reinforced concrete main load-bearing piles 1 are first driven into the sidewalls of the box culvert at the proposed culvert location, according to the designed width of the box culvert. The length of the main load-bearing piles 1 is generally not less than 3 to 4 times the height of the box culvert. The top elevation of the main load-bearing piles 1 is controlled according to the designed top elevation of the box culvert. The length of the main load-bearing piles 1 below the designed bottom elevation of the box culvert is generally 2 to 3 times the height of the box culvert, depending on the geological conditions. To save investment, the main load-bearing piles 1 are spaced 1m apart, and two main load-bearing piles 1 are connected by precast reinforced concrete connecting sheet piles 2. The connecting sheet piles 2 are connected to the main load-bearing piles 1 using grooves 11. Waterstops, waterstop strips, waterstop steel plates, and other water-stopping facilities are installed between the grooves 11 of the main load-bearing piles 1 and the connecting sheet piles 2 to prevent leakage later. The top of the connecting sheet piles 2 is flush with the top of the main load-bearing piles 1, and its length is 2 to 3 times the height of the box culvert.

[0017] After the main load-bearing pile 1 and the connecting sheet pile 2 are constructed, a reinforced concrete cap beam 4 is installed on top of the main load-bearing pile 1 and the connecting sheet pile 2 to connect the main load-bearing pile 1 and the connecting sheet pile 2 into a whole to form the side wall of the box culvert.

[0018] After the construction of the box culvert sidewalls is completed, the earthwork between the sidewalls is excavated to 0.5m below the design bottom elevation of the box culvert. To avoid the influence of soil pressure during excavation, the piles are tilted inward. A reinforced concrete tie beam 3 is installed transversely between the main load-bearing piles 1 below the design bottom elevation of the box culvert, providing support for the main load-bearing piles 1 and ensuring the stability of the box culvert sidewalls. The area between the tie beams 3 is backfilled with cement-soil, riprap, and other foundation backfill materials 7 to the design bottom elevation. After the backfilling is completed, a reinforced concrete box culvert bottom slab 5 is constructed. Waterstops, waterstop strips, and waterstop steel plates are installed between the box culvert bottom slab 5 and the box culvert sidewalls to prevent leakage later. The bottom elevations of the main load-bearing piles 1 and the connecting sheet piles 2 that constitute the box culvert sidewalls are much lower than the bottom elevation of the box culvert bottom slab 5, so even if the box culvert bottom slab 5 settles later, no leakage will occur.

[0019] After the bottom slab 5 of the box culvert is completed, the reinforced concrete top slab 6 of the box culvert is constructed on the capping beam 4 at the top of the sidewall of the box culvert. After the concrete strength of the top slab 6 reaches the required level, the upper part of the box culvert is covered with soil.

[0020] This utility model uses main load-bearing piles 1 and connecting sheet piles 2 as the sidewalls of the box culvert, which can complete the construction of the sidewalls of the box culvert without excavation. At the same time, the main load-bearing piles 1 and connecting sheet piles 2 can also serve as slope protection, which facilitates the construction of the bottom slab 5 of the box culvert. Compared with the traditional solution, it speeds up the construction progress of the box culvert, reduces the amount of earthwork excavation, and also saves investment in foundation treatment.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precast sheet pile box culvert for rapid construction, characterized in that, The culvert includes main load-bearing piles (1), connecting sheet piles (2), tie beams (3), cap beams (4), box culvert bottom slab (5), and box culvert top slab (6). The main load-bearing piles (1) are divided into two rows according to the design width of the box culvert. The two rows of main load-bearing piles (1) are vertically inserted into the foundation at equal intervals on both sides of the box culvert. The length of the main load-bearing piles (1) is greater than the height of the box culvert, and its top elevation is controlled according to the design top elevation of the box culvert. Vertical grooves (11) are provided on both sides of the main load-bearing piles (11). The connecting sheet piles (2) are vertically inserted between two adjacent main load-bearing piles (1) in the same row along the longitudinal direction of the box culvert. The two ends of the connecting sheet piles (2) are respectively inserted into the grooves of the two main load-bearing piles (1). 11) The height of the connecting sheet pile (2) is greater than the height of the box culvert, and its top is flush with the top of the main load-bearing pile (1). The tie beam (3) is horizontally abutted between two adjacent main load-bearing piles (1) in different rows below the design bottom elevation of the box culvert. The cap beam (4) is connected longitudinally along the box culvert to the top of the main load-bearing pile (1) and the connecting sheet pile (2) in the same row, connecting the main load-bearing pile (1) and the connecting sheet pile (2) into a whole to form the side wall of the box culvert. The area between the tie beams (3) is filled with foundation backfill material (7). The bottom plate (5) of the box culvert is laid on the surface of the tie beam (3) and the foundation backfill material (7). The top plate (6) of the box culvert covers the top of the cap beam (4) of the two rows of box culvert side walls.

2. The precast sheet pile box culvert for rapid construction according to claim 1, characterized in that, The length of the main load-bearing pile (1) is not less than 3 to 4 times the height of the box culvert, and the length of the main load-bearing pile (1) located below the design bottom elevation of the box culvert is 2 to 3 times the height of the box culvert.

3. A precast sheet pile box culvert for rapid construction according to claim 1, characterized in that, The length of the connecting sheet pile (2) is 2 to 3 times the height of the box culvert.

4. A precast sheet pile box culvert for rapid construction according to claim 1, characterized in that, The main load-bearing piles (1) located in the same row are spaced 1m apart.

5. A precast sheet pile box culvert for rapid construction according to claim 1, characterized in that, A water-stopping device is provided between the groove (11) of the main load-bearing pile (1) and the connecting sheet pile (2).

6. A precast sheet pile box culvert for rapid construction according to claim 1, characterized in that, A water-stopping device is provided between the bottom plate (5) of the box culvert and the side wall of the box culvert.

7. A precast sheet pile box culvert for rapid construction according to claim 1, characterized in that, The main load-bearing pile (1) and the connecting sheet pile (2) are precast reinforced concrete components.

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