Flow guide structure penetrating through newly-built revetment in limited site

Abstract

The utility model relates to a diversion structure passing through a newly-built revetment in a limited site, the limited site refers to that an existing building exists on at least one of the two banks of a river, the newly-built revetment is arranged on the two banks of a river channel, the diversion structure comprises a diversion pipe, an inner cofferdam and an outer cofferdam are arranged on the river channel, and the inner cofferdam and the outer cofferdam are arranged in the diversion pipe. A flow guide pipe for communicating the inside and the outside is arranged between the inner cofferdam and the outer cofferdam, the flow guide pipe is arranged in a double-line parallel mode, and a flow guide pipe body of the flow guide pipe penetrating through the newly-built revetment is located below the ground of a construction implementation area. A concrete plate and a cast-in-place pile are arranged at the joint of the flow guide pipes and the newly-built revetment, the cast-in-place pile is arranged at the bottom of the concrete plate, and the concrete plate supports the two flow guide pipes to penetrate through the newly-built revetment so that the inside and the outside of the flow guide pipes can be located on the same horizontal plane. The flow guide structure can be effectively arranged in a limited construction site without affecting the flow guide function and the construction requirement, and the whole body is kept horizontal without damaging a newly-built revetment.

Description

A diversion structure for crossing a newly constructed revetment within a limited site Technical Field

[0001] This utility model relates to the field of water conservancy facility construction, and in particular to a flow guiding structure that crosses a newly built revetment within a limited construction site. Background Technology

[0002] In water conservancy project construction, limited construction sites are sometimes involved, especially when renovating old water conservancy projects. The presence of existing buildings often greatly restricts the construction space. Therefore, how to ensure the efficient and high-quality completion of water conservancy projects within limited construction sites, while taking care not to damage existing buildings, places high standards and requirements on the structural design and construction technology during the construction process.

[0003] When constructing new pumping stations in tributary channels, the proximity to the main channel and the wider confluence make designing and constructing the pumping stations difficult. Construction must be carried out near the narrower confluence, necessitating the demolition of existing revetments and the construction of new ones. Furthermore, the construction of two cofferdams (one before and one after) is required to cut off the water flow within the construction area, allowing for the pouring of the main concrete structure and the installation of large equipment. Simultaneously, the two ends of the cut-off channel must be connected using diversion channels or devices to ensure the tributary remains connected to the main channel, thus meeting flood control and tide prevention requirements.

[0004] In the prior art, patent 201010130333.8 discloses a method for intercepting and encroaching on a levee using a diversion channel with an upstream cofferdam in a river channel. This patent indicates that the diversion channel is used to connect the river channel outside the cofferdam to maintain a continuous water flow. However, while this type of diversion channel is feasible for conventional water conservancy facilities, it becomes difficult to construct the channel when there are existing structures on both sides of the riverbank that cannot be moved, which will affect the overall construction progress and efficiency. Based on the construction requirements of a narrow construction area, a new diversion structure must be designed to meet the requirements of crossing newly built revetments, newly built cofferdams, and limited construction space. Summary of the Invention

[0005] The purpose of this invention is to overcome the difficulties in the existing technology of diversion pipes crossing newly built revetments and the inability to effectively arrange them within limited space, and to provide a diversion structure that can cross newly built revetments within limited space. The diversion structure of this invention must be able to be effectively arranged within a limited construction site without affecting its diversion function and construction requirements, and must also ensure that it remains horizontal and does not damage the newly built revetment.

[0006] To achieve the above-mentioned objectives, the technical solution provided by this utility model is as follows:

[0007] A diversion structure for crossing a newly constructed revetment within a limited site, wherein the limited site refers to an existing, immovable building on at least one bank of a river, with the existing building on one side of the riverbank being adjacent to the river channel, and the existing building on the other side of the riverbank having a riverside road at a distance from the riverbank. A new revetment is constructed on both banks of the river channel. The diversion structure includes a diversion pipe and a cofferdam. An inner cofferdam and an outer cofferdam are provided on the river channel. A pumping station construction area is located between the inner and outer cofferdams. A construction implementation area is set up on the riverside road on one side of the pumping station construction area. A diversion pipe connecting the inner and outer sides is provided between the inner and outer cofferdams. The diversion pipe is arranged in two parallel lines. After passing through the new revetment, the main body of the diversion pipe is below the ground level of the construction implementation area. A concrete slab and cast-in-place piles are provided at the junction of the diversion pipe and the new revetment. The cast-in-place piles are located at the bottom of the concrete slab. The concrete slab supports the two diversion pipes passing through the new revetment, so that the inner and outer sides of the diversion pipes are on the same horizontal plane.

[0008] In the present invention, a flow guiding structure for crossing a newly constructed revetment within a limited space, the junction point between the flow guiding pipe and the newly constructed revetment is divided into an inner river revetment wall-penetrating node and an outer river revetment wall-penetrating node. The inner river revetment wall-penetrating node is close to the inner cofferdam, and the outer river revetment wall-penetrating node is close to the outer cofferdam.

[0009] In the present invention, a diversion structure for crossing a newly constructed revetment within a limited space, the concrete base plate at the wall-penetrating node of the inland river revetment is a C30 reinforced concrete base plate, and a sunken base plate is adopted at the crossing point of the diversion pipe. The width of the sunken point is greater than the outer distance between the two diversion pipes, and the height of the sunken point is greater than the height of the diversion pipe.

[0010] In the present invention, a diversion structure for crossing a newly constructed revetment within a limited space, the concrete base plate at the wall-penetrating node of the outer river revetment is a C30 reinforced concrete base plate, and a sunken base plate is adopted at the crossing point of the diversion pipe. The width of the sunken point is greater than the outer distance between the two diversion pipes, and the height of the sunken point is greater than the height of the diversion pipe.

[0011] In the present invention, a diversion structure for crossing a newly built revetment within a limited space is provided, wherein a concrete retaining wall is provided between the elevation changes of the concrete base plate, and the concrete retaining wall is made of C30 reinforced concrete.

[0012] In the present invention, a diversion structure for crossing a newly built revetment within a limited space is provided at the bottom of the concrete base slab, with a double row of pile foundations at the bottom. The arrangement density of the front row of pile foundations is greater than that of the rear row of pile foundations, and the front row of pile foundations is closer to the center of the river channel.

[0013] In the present invention, a diversion structure for crossing a newly constructed revetment within a limited space is further provided, wherein the arrangement density of the front row of pile foundations is twice that of the arrangement density of the rear row of pile foundations.

[0014] In the present invention, a diversion structure for crossing a newly built revetment within a limited space is provided, and a pile foundation is also provided at the sinking position of the concrete base plate. The top of the pile foundation abuts against the concrete base plate to provide support. The bottom of the concrete is filled with backfill soil, and a high-pressure jet grouting pile for reinforcement is provided on the backfill soil.

[0015] Based on the above technical solution, the diversion structure of this utility model that crosses a newly built revetment within a limited space has achieved the following technical effects through practical application in engineering projects:

[0016] 1. The diversion structure of this utility model adopts a double diversion pipe parallel design. By arranging it below the construction site on one side of the revetment, it saves layout space according to the characteristics of the project. It can achieve water system connection on both sides of the river cofferdam without affecting construction. During the flood season, the diversion pipe can achieve height adjustment to meet the needs of flood control and flood prevention, and also fully meet the construction requirements of new pump gates in narrow spaces.

[0017] 2. The main body of the diversion structure of this utility model is arranged below the construction site on the outside of the revetment. It needs to cross the newly built revetment twice and needs to meet the overall horizontal requirements so that the two diversion pipes are on the same horizontal plane. Moreover, the part in contact with the revetment should not affect the construction of the revetment. A concrete base plate structure is set at the contact point between the newly built revetment and the diversion pipes. The base plate should be set with corresponding elevation changes to meet the requirement that the diversion pipes are on the same horizontal plane. In addition, a recessed part with constant thickness is set for the side-by-side arrangement of the diversion pipes to meet the installation elevation of the diversion pipes.

[0018] 3. During the installation and construction of the diversion pipe of this utility model, a special concrete base plate is set at the wall-penetrating node section of the inner river revetment and the outer river revetment. Cast-in-place piles are arranged at the bottom of the concrete base plate. The cast-in-place piles sink at the diversion crossing point to realize the arrangement of the diversion pipe. The pile foundation adopts a double-row design with front and rear rows, and the spacing of the pile foundations in the front row is smaller than that in the rear row. The dense driving of the front row ensures the support strength and water pressure resistance. Attached Figure Description

[0019] Figure 1 is a schematic plan view of the arrangement of a flow guiding structure that crosses a newly built revetment within a limited space according to this utility model.

[0020] Figure 2 is a schematic diagram of the inland river revetment wall penetration node in a flow guiding structure that crosses a newly built revetment within a limited space according to this utility model.

[0021] Figure 3 is a schematic diagram of the wall-penetrating node of the outer river revetment in a flow guiding structure that crosses a newly built revetment within a limited space according to this utility model.

[0022] Figure 4 is a schematic diagram of the concrete base plate cross section in a diversion structure that crosses a newly built revetment within a limited space according to this utility model.

[0023] Figure 5 is a schematic diagram of the arrangement of high-pressure jet grouting piles in a diversion structure that crosses a newly built revetment within a limited space according to this utility model. Detailed Implementation

[0024] The following detailed description of a flow-guiding structure for crossing a newly constructed revetment within a limited space, in conjunction with the accompanying drawings and specific embodiments, aims to provide a clearer understanding of its structural composition and working method. However, this description should not be construed as limiting the scope of protection of this utility model.

[0025] This utility model relates to a flow guiding structure that crosses a newly built revetment within a limited space. The limited space refers to a situation where there are existing buildings that cannot be moved on at least one bank of a river, and the existing buildings on one side of the river are close to the river channel, while the existing buildings on the other side of the river have a road along the river at a distance from the riverbank. A new revetment is set up on both banks of the river channel.

[0026] As shown in Figures 1 to 5, the diversion structure includes a diversion pipe and a cofferdam. An inner cofferdam 3 and an outer cofferdam 2 are provided on the river channel 1. A pumping station construction area 4 is located between the inner cofferdam 3 and the outer cofferdam 2. A construction implementation area 5 is set up on a riverside road on one side of the pumping station construction area 4. A diversion pipe 6 connecting the inner and outer sides is provided between the inner cofferdam 3 and the outer cofferdam 2. The diversion pipe 6 is arranged in two parallel lines. After passing through the newly constructed revetment, the main body of the diversion pipe 6 is below the ground level in the construction implementation area 5. A concrete slab 10 and cast-in-place piles 11 are provided at the junction of the diversion pipe 6 and the newly constructed revetment. The cast-in-place piles 11 are located at the bottom of the concrete slab 10. The concrete slab 10 supports the two diversion pipes 6 as they pass through the newly constructed revetment, ensuring that the inner and outer sides of the diversion pipes 6 are on the same horizontal plane.

[0027] During construction, the junction between the diversion pipe 6 and the newly built revetment is divided into an inner river revetment wall penetration node 7 and an outer river revetment wall penetration node 8. The inner river revetment wall penetration node 7 is close to the inner cofferdam 3, and the outer river revetment wall penetration node 8 is close to the outer cofferdam 2.

[0028] The concrete base slab 10 at the wall penetration node 7 of the inland river revetment is a C30 reinforced concrete slab. A sunken base slab is adopted at the crossing point of the diversion pipe 6. The width of the sunken area is greater than the outer distance between the two diversion pipes 6, and the height of the sunken area is greater than the height of the diversion pipe. Similarly, the concrete base slab 10 at the wall penetration node 8 of the outer river revetment is a C30 reinforced concrete slab. A sunken base slab is adopted at the crossing point of the diversion pipe 6. The width of the sunken area is greater than the outer distance between the two diversion pipes, and the height of the sunken area is greater than the height of the diversion pipe.

[0029] A concrete retaining wall is installed between the elevation changes of the concrete base slab 10. The retaining wall is made of C30 reinforced concrete and has a thickness of 0.5 meters.

[0030] The bottom of the concrete base slab 10 is provided with double rows of pile foundations. The pile foundations are cast-in-place piles with a diameter of 1000 mm and a length of 18 meters. The arrangement density of the front row of pile foundations 11a is greater than that of the rear row of pile foundations 11b, with the front row of pile foundations 11a being closer to the center of the river channel. Furthermore, the arrangement density of the front row of pile foundations 11a is twice that of the rear row of pile foundations 11b. Pile foundations are also provided at the sinking position of the concrete base slab 10. The top of these pile foundations abuts against the concrete base slab for support. The bottom of the concrete is filled with backfill soil, and high-pressure jet grouting piles 12 are installed on the backfill soil for reinforcement. To prevent soil collapse during construction excavation, high-pressure jet grouting piles are used to reinforce the soil at locations where the elevation of the base slab changes.

[0031] The main body of the diversion structure of this utility model is arranged below the construction site on the outer side of the revetment. It needs to cross the newly built revetment twice and must meet the overall horizontal requirements so that the two diversion pipes are on the same horizontal plane. Furthermore, the contact points with the revetment should not affect the revetment construction. This is achieved by setting a concrete base slab structure at the contact points between the new revetment and the diversion pipes. The base slab has corresponding elevation changes to ensure the diversion pipes are on the same horizontal plane. A recessed section with a constant thickness is also provided for the parallel arrangement of the diversion pipes to meet the installation elevation requirements. Special concrete base slabs are set at the wall-crossing nodes of the inner and outer river revetments. Cast-in-place piles are arranged at the bottom of the concrete base slabs. The piles sink at the diversion crossing points to achieve the diversion pipe arrangement. The piles adopt a double-row design with front and rear rows, and the spacing between the front row piles is smaller than that between the rear rows. The dense driving of the front row piles ensures the support strength and water pressure resistance.

Claims

1. A diversion structure for crossing a newly constructed revetment within a limited site, wherein the limited site refers to an existing, immovable building on at least one bank of a river, with the existing building on one side of the riverbank being adjacent to the river channel, and the existing building on the other side of the riverbank having a riverside road at a distance from the riverbank, characterized in that, New revetments are constructed on both banks of the river. The diversion structure includes diversion pipes and cofferdams. An inner cofferdam and an outer cofferdam are provided on the river. Between the inner and outer cofferdams is a pumping station construction area. A construction implementation area is set up on the riverside road on one side of the pumping station construction area. A diversion pipe connecting the inner and outer sides is provided between the inner and outer cofferdams. The diversion pipe is arranged in two parallel lines. After passing through the new revetment, the main body of the diversion pipe is below the ground level of the construction implementation area. A concrete slab and cast-in-place piles are provided at the junction of the diversion pipe and the new revetment. The cast-in-place piles are set at the bottom of the concrete slab. The concrete slab supports the two diversion pipes passing through the new revetment so that the inner and outer sides of the diversion pipes are on the same horizontal plane.

2. The diversion structure for crossing a newly constructed revetment within a limited space, as described in claim 1, is characterized in that, The junction between the diversion pipe and the newly built revetment is divided into an inland river revetment wall penetration node and an outer river revetment wall penetration node. The inland river revetment wall penetration node is close to the inner cofferdam, and the outer river revetment wall penetration node is close to the outer cofferdam.

3. A diversion structure for crossing a newly constructed revetment within a limited space, as described in claim 2, is characterized in that... The concrete base slab at the wall penetration node of the inland river revetment is a C30 reinforced concrete base slab. A sunken base slab is adopted at the crossing point of the diversion pipe. The width of the sunken area is greater than the distance between the outer sides of the two diversion pipes, and the height of the sunken area is greater than the height of the diversion pipe.

4. A flow-guiding structure for crossing a newly constructed revetment within a limited space, as described in claim 2, is characterized in that, The concrete base slab at the wall penetration node of the outer river revetment is a C30 reinforced concrete base slab. A sunken base slab is adopted at the point where the diversion pipe passes through. The width of the sunken area is greater than the distance between the outer sides of the two diversion pipes, and the height of the sunken area is greater than the height of the diversion pipe.

5. A flow guiding structure for crossing a newly constructed revetment within a limited space, as described in claim 3 or 4, characterized in that, A concrete retaining wall is provided between the elevation changes of the concrete base slab. The concrete retaining wall is made of C30 reinforced concrete.

6. A diversion structure for crossing a newly constructed revetment within a limited space, as described in claim 1, is characterized in that, The bottom of the concrete base slab is provided with double rows of pile foundations. The arrangement density of the front row of pile foundations is greater than that of the rear row of pile foundations. The front row of pile foundations is closer to the center of the river channel.

7. A diversion structure for crossing a newly constructed revetment within a limited space, as described in claim 6, is characterized in that, The arrangement density of the front row of pile foundations is twice that of the arrangement density of the rear row of pile foundations.

8. A flow-guiding structure for crossing a newly constructed revetment within a limited space, as described in claim 6, is characterized in that, A pile foundation is also provided at the sinking position of the concrete base slab. The top of the pile foundation abuts against the concrete base slab to provide support. The bottom of the concrete is filled with backfill soil, and a high-pressure jet grouting pile for reinforcement is provided on the backfill soil.

Images