Box culvert foundation dike structure and construction method

Abstract

This invention discloses a box culvert foundation embankment structure and construction method that also serves as drainage. First, a first retaining wall and a second retaining wall are constructed on the water-facing slope side and the backwater side near the houses, respectively, on both sides of the supporting piles. The box culvert construction trench is excavated, exposing the tops of the supporting piles. Hollow box culverts are poured in sections, connecting each section to the top of the corresponding supporting pile. After the hollow box culvert has solidified and the formwork is removed, clay is backfilled between the hollow box culvert and the first retaining wall, and between the hollow box culvert and the second retaining wall. The advantages are that the first retaining wall provides seepage prevention and support, while the second retaining wall supports existing village houses to prevent collapse. This allows for quick trench excavation, and the integrated connection between the hollow box culvert and the tops of the supporting piles ensures good stability, making the hollow box culvert less prone to movement and resulting in good project quality stability.

Description

Technical Field

[0001] This invention relates to the field of dike technology, and in particular to a box culvert foundation dike structure that also serves as a drainage system and its construction method. Background Technology

[0002] Existing dikes are mostly constructed with backfilled earth and rock, often with pile foundations at the bottom. Various slope protection methods are used on the water-facing side, requiring high levels of seepage prevention and stability. Therefore, drainage ditches are often needed on the back side for drainage. When there are buildings near the back side and land acquisition is difficult, construction space is limited, making it impossible to construct drainage ditches, and the drainage problem is more difficult to solve.

[0003] A box culvert is a culvert constructed using reinforced concrete box-shaped pipe sections. It consists of one or more square or rectangular sections, typically made of reinforced concrete or cast-in-place concrete, though reinforced concrete is more commonly used. Box culverts are used for drainage, pedestrian and vehicular passage.

[0004] To address this issue, relevant personnel developed a box culvert foundation embankment structure, which includes retaining walls on both sides and a hollow box culvert in the middle. The space between the hollow box culvert and the retaining walls on both sides is filled with clay. Although this effectively solved the aforementioned problems, the hollow box culvert is not stable enough. During periods of heavy rainfall, it can move when the clay becomes too soft from soaking, leading to drainage leakage inside the box culvert and affecting the safety of the embankment. Improvement is urgently needed. Summary of the Invention

[0005] The problem to be solved by the present invention is to provide a box culvert foundation embankment structure and construction method that is stable, does not easily move, and also serves as drainage.

[0006] One technical solution adopted by this dike structure to solve the above problems is: a box culvert foundation dike structure that also serves as drainage, including a flood control dike, on which a hollow box culvert for drainage is provided, a first retaining wall is provided on the water-facing slope side of the hollow box culvert, and a second retaining wall is provided on the water-repellent side of the hollow box culvert facing the houses; the bottom of the hollow box culvert is provided with two or three rows of support piles, and the hollow box culvert is made of cast-in-place concrete and is connected to the top of the support piles as one unit.

[0007] The technical solution adopted by this construction method to solve the above problems is as follows: a construction method for the above-mentioned box culvert foundation embankment structure that also serves as drainage, the specific steps of which are as follows: firstly, construct the first retaining wall and the second retaining wall on the water-facing slope side and the backwater-facing building side on both sides of the support piles respectively; excavate the box culvert construction trench to expose the top of the support piles; pour hollow box culverts in sections and connect the hollow box culvert section with the top of the corresponding support pile to form a whole; after the hollow box culvert has solidified and the formwork is removed, backfill clay between the hollow box culvert and the first retaining wall and between the hollow box culvert and the second retaining wall.

[0008] Compared with existing technologies, the advantages of this box culvert foundation embankment structure and its construction method, which also serves as a drainage system, are as follows: while the first retaining wall plays a role in preventing seepage and providing support, and the second retaining wall provides support and prevents collapse of existing village houses, the top of the support piles is excavated in the construction trench, so that the hollow box culvert after pouring is connected to the top of the support piles as a whole. The hollow box culvert has good stability and is not easy to move, the project quality is stable, there is no leakage in the internal drainage, and the embankment structure is safe.

[0009] As an improvement, in the drainage-integrated box culvert foundation embankment structure, the hollow box culvert is located on the top of the flood control embankment. The water-facing slope side of the hollow box culvert is equipped with a convex glass flood control wall or a reinforced concrete flood control wall. The glass mounting wall of the reinforced concrete flood control wall or the glass flood control wall is integrally cast with the hollow box culvert. This effectively increases the flood control height and requires less material.

[0010] As an improvement, in the drainage-integrated box culvert foundation embankment structure, the vertical waterstop within the reinforced concrete flood wall or the glass-mounted wall connects with the plastic-steel sheet piles under the hollow box culvert to form a waterproof seal. The top of the plastic-steel sheet piles is integrally connected to the bottom slab of the hollow box culvert. This can further extend the bearing time of the reinforced concrete flood wall or glass flood wall. The effective waterproof structure formed by the plastic-steel sheet piles and the vertical waterstop can delay the penetration time of the clay at the bottom and rear of the hollow box culvert, and prevent the flood wall behind the waterproof structure from being penetrated.

[0011] As an improvement, in the drainage-integrated culvert foundation embankment structure, the bottom of the water-facing slope of the hollow culvert is provided with an outwardly protruding anti-tilting foot. The anti-tilting foot is designed to provide a downward pressure on the water-facing side of the hollow culvert, enabling the reinforced concrete or glass flood wall to withstand greater water pressure. This reduces the risk of the backfill clay becoming too soft due to flood soaking when the water pressure on the reinforced concrete or glass flood wall is transferred to the hollow culvert, potentially causing it to tilt towards the leeward side.

[0012] As a preferred option, in the embankment structure of the box culvert foundation that also serves as drainage, a flood control road is poured on the top slab of the hollow box culvert. This road is used for the rapid passage of flood control vehicles and can also be used as a road for residents inside the village houses on the inner side during normal times.

[0013] As a preferred option, in the embankment structure of the box culvert foundation that also serves as drainage, a reinforced concrete drainage ditch is poured on top of the backfill clay on the backwater side of the hollow box culvert adjacent to the building. A precast concrete cover plate is laid on top of the reinforced concrete drainage ditch, and the top surface of the precast concrete cover plate is lower than the flood control road surface. This delays the softening time of the backfill clay on the backwater side of the hollow box culvert adjacent to the building, maintaining a good bearing capacity of the hollow box culvert.

[0014] As an improvement, in the drainage-integrated box culvert foundation embankment structure, the bottom of the hollow box culvert is provided with a toothed wall. This is to reduce the possibility of movement of the hollow box culvert.

[0015] As an improvement, in the construction method, before the segmented casting of the hollow box culvert, plastic steel sheet piles with exposed tops are first driven into the back of the first retaining wall on the water-facing slope side. A vertical waterstop is then erected inside the reinforced concrete flood control wall or the glass installation wall, and the bottom of the vertical waterstop is effectively connected to the top of the plastic steel sheet pile to form a waterproof seal. Then, the hollow box culvert is cast integrally with the reinforced concrete flood control wall or the glass installation wall.

[0016] As an improvement, in the construction method, a reinforced concrete drainage ditch is poured on top of the backfilled clay on the side facing the water and a precast concrete cover is laid. The top surface of the precast concrete cover is lower than the road surface of the flood control road. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the dike structure of the present invention. Detailed Implementation

[0018] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of the present invention, including various details to aid understanding. These details should be considered merely exemplary; for clarity, communication cables and wiring within the enclosure are not shown. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0019] This preferred embodiment is, for example Figure 1 The diagram illustrates a culvert foundation embankment structure that also serves as a drainage system. It includes a flood control embankment upon which a hollow culvert for drainage is installed. A first retaining wall is located on the water-facing slope of the hollow culvert, and a second retaining wall is located on the water-repellent, building-facing side. Two or three rows of support piles are installed at the bottom of the hollow culvert. The hollow culvert is constructed of cast-in-place concrete and is integrally connected to the top of the support piles. Both the first and second retaining walls are constructed using Larssen sheet piles, resulting in a small footprint, minimal construction space requirements, quick operation, and water seepage prevention, allowing for rapid excavation of the culvert construction trench.

[0020] In this embodiment, the hollow box culvert is installed on the top of the flood control dike, and the water-facing slope side of the hollow box culvert is provided with an upward-protruding glass flood control wall or a reinforced concrete flood control wall. The glass installation wall of the reinforced concrete flood control wall or the glass flood control wall is integrally cast with the hollow box culvert.

[0021] Furthermore, the vertical waterstops within the reinforced concrete flood wall or the glass-installed wall are connected to the plastic-steel sheet piles beneath the hollow box culvert to form a waterproof seal. The tops of the plastic-steel sheet piles are integrally connected to the bottom slab of the hollow box culvert. This forms an effective waterproof structure, which can delay the penetration time of the clay at the bottom and rear of the hollow box culvert and prevent the flood wall behind the waterproof structure from being penetrated, thereby extending the bearing time of the reinforced concrete or glass flood wall and reducing the risk of levee collapse.

[0022] Furthermore, the bottom of the water-facing slope of the hollow box culvert is provided with an outwardly protruding anti-tilting foot. The anti-tilting foot is designed to provide the hollow box culvert with downward pressure, enabling the reinforced concrete or glass flood wall to withstand greater water pressure. This reduces the risk of tilting that may occur when the water pressure on the reinforced concrete or glass flood wall is transferred to the hollow box culvert due to the backfill clay becoming too soft after being soaked by floodwater.

[0023] Preferably, a flood control road is poured on the top slab of the hollow box culvert to support the rapid passage of flood control vehicles. A reinforced concrete drainage ditch is poured on the top of the backfill clay on the backwater side of the hollow box culvert adjacent to the building. A precast concrete cover plate is laid on the top of the reinforced concrete drainage ditch, and the top surface of the precast concrete cover plate is lower than the road surface of the flood control road.

[0024] Preferably, the bottom of the hollow box culvert can be provided with multiple toothed walls. In this embodiment, a downwardly convex toothed wall is formed only at the head of the plastic steel sheet pile.

[0025] The construction method for the above-mentioned box culvert foundation embankment structure that also serves as drainage involves the following steps: First, construct the first and second retaining walls on the water-facing slope side and the backwater-facing building side, respectively, on both sides of the support piles; excavate the box culvert construction trench to expose the top of the support piles; pour the hollow box culvert in sections and connect each section of the hollow box culvert with the top of the corresponding support pile; after the hollow box culvert has solidified and the formwork has been removed, backfill clay between the hollow box culvert and the first retaining wall, and between the hollow box culvert and the second retaining wall.

[0026] Before the segmented pouring of the hollow box culvert, plastic steel sheet piles with exposed tops are driven into the back of the first retaining wall on the water-facing slope side. Vertical waterstops are erected inside the reinforced concrete flood control wall or glass installation wall, and the bottom of the vertical waterstops is effectively connected to the top of the plastic steel sheet piles to form a waterproof seal. After the formwork is assembled, the hollow box culvert is poured integrally with the reinforced concrete flood control wall or glass installation wall. After the hollow box culvert solidifies and the formwork is removed, a downward-protruding toothed wall is formed on the top of the plastic steel sheet piles, and an outward-protruding anti-tilting foot is formed at the bottom of the water-facing slope side of the hollow box culvert.

[0027] Finally, a reinforced concrete drainage ditch was poured on top of the backfilled clay on the side facing the water, and a precast concrete cover was laid. The top surface of the precast concrete cover was lower than the road surface of the flood control road.

[0028] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A box culvert foundation embankment structure that also serves as drainage, comprising a flood control embankment, wherein a hollow box culvert for drainage is provided on the flood control embankment, a first retaining wall is provided on the water-facing slope side of the hollow box culvert, and a second retaining wall is provided on the water-repellent side of the hollow box culvert facing the building, characterized in that, The first and second retaining walls are both connected by Larssen sheet piles to prevent water seepage. The bottom of the hollow box culvert is provided with two or three rows of support piles. The hollow box culvert is made of cast-in-place concrete and is connected to the top of the support piles as one piece. The hollow box culvert is located on the top of the flood control dike, and the water-facing slope of the hollow box culvert is provided with an upward-protruding glass flood control wall or reinforced concrete flood control wall; the glass installation wall of the reinforced concrete flood control wall or the glass flood control wall is integrally cast with the hollow box culvert. The vertical waterstop inside the reinforced concrete flood control wall or the glass-installed wall is connected to the plastic steel sheet piles under the hollow box culvert to form a waterproof seal, and the top of the plastic steel sheet piles is integrally connected to the bottom plate of the hollow box culvert. The hollow box culvert has a reinforced concrete drainage ditch poured on top of the backfill clay on the backwater side facing the building.

2. The box culvert foundation embankment structure that also serves as drainage according to claim 1, characterized in that, The hollow box culvert has outward-protruding anti-tipping feet at the bottom of the water-facing slope.

3. The box culvert foundation embankment structure that also serves as drainage according to claim 1, characterized in that, A flood control road is poured on the top slab of the hollow box culvert.

4. A box culvert foundation embankment structure that also serves as drainage, as described in claim 3, is characterized in that... A precast concrete cover plate is laid on top of the reinforced concrete drainage ditch, and the top surface of the precast concrete cover plate is lower than the road surface of the flood control road.

5. A box culvert foundation embankment structure that also serves as drainage, as described in claim 1, is characterized in that... The hollow box culvert has a toothed wall at the bottom.

6. A construction method for a box culvert foundation embankment structure that also serves as drainage, as described in claim 1, characterized in that, The specific steps are as follows: First, construct the first and second retaining walls, which are both made of Larssen steel sheet piles and connected to prevent water seepage, on the water-facing slope side and the backwater-facing building side on both sides of the support piles; excavate the box culvert construction trench to expose the top of the support piles; pour the hollow box culvert in sections and connect the hollow box culvert section with the top of the corresponding support pile to form a whole; after the hollow box culvert has solidified and the formwork has been removed, backfill clay between the hollow box culvert and the first retaining wall and between the hollow box culvert and the second retaining wall, and pour reinforced concrete drainage ditch on the backwater-facing building side after backfilling the clay. Before the sectional casting of the hollow box culvert, first drive the exposed plastic steel sheet piles behind the first retaining wall on the water-facing slope side. Then, construct a vertical waterstop inside the reinforced concrete flood control wall or glass installation wall, and ensure that the bottom of the vertical waterstop is effectively connected to the top of the plastic steel sheet pile to form a waterproof seal. Finally, cast the hollow box culvert and the reinforced concrete flood control wall or glass installation wall together.

7. The construction method of the box culvert foundation embankment structure that also serves as drainage according to claim 6, characterized in that, Precast concrete slabs are laid on the reinforced concrete drainage ditch, with the top surface of the precast concrete slabs lower than the road surface of the flood control road.

Images