Flow guiding channel for internal overflowing of bank protection retaining wall structure and construction method
By using the design of overflowing diversion channel for the internal overflow of the bank retaining wall structure in the rivers in towns and surrounding areas, the diversion cavity of the early structure and the permanent retaining wall of the later structure are used to solve the construction problems of traditional diversion channel, and the effect of saving land, reducing investment and shortening construction period is achieved.
Patent Information
- Application Number
- CN202510356400.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2025-05-02
AI Technical Summary
In rivers in towns and surrounding areas, traditional open diversion channels are difficult to implement, mainly due to narrow riverbeds, dense shore houses and difficulty in land acquisition and demolition.
The design of open channel with overflow inside the bank guard wall structure is adopted, including the early structure and the late structure. The early structure forms a diversion cavity through the rear piles, front piles, crown beams, front and rear pile connecting beams and bottom plate concrete, which is used for temporary diversion; the later structure forms a permanent structure through backfill soil and concrete retaining walls.
This plan saves land use, reduces investment costs, and shortens construction period, effectively solving the problem of construction of open channel diversion channels in urban and surrounding areas.
Smart Images
Figure CN119913863A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of water conservancy construction and is applied to river management projects in towns and surrounding areas, and specifically to an open diversion channel for flow inside a bank retaining wall structure and a construction method. Background Art
[0002] Open channel diversion is an important construction diversion method in water conservancy projects. Its basic principle is to change the water flow path and guide the water flow from the upstream to the downstream of the construction area, thereby creating dry land construction conditions for the construction area. Traditional diversion open channels usually adopt two construction methods: one is to dig an open channel on the river beach or river bank, and the other is to use a longitudinal cofferdam to form a diversion channel when the riverbed is wide. However, both methods have obvious limitations: the shore excavation method requires the requisition of a large area of temporary land, while the method of using a longitudinal cofferdam is limited by the riverbed width requirements. Especially in rivers in towns and surrounding areas, the riverbed is narrow, the houses on the shore are dense, and land acquisition and demolition are difficult. Traditional diversion open channel solutions are often difficult to implement. Summary of the invention
[0003] The present invention aims to overcome at least one defect of the above-mentioned prior art, provide a diversion open channel for flow inside a bank retaining wall structure and a construction method, and solve the problem of construction of diversion open channels in rivers in towns and surrounding areas.
[0004] On the one hand, the present invention provides a diversion open channel for internal flow of a bank retaining wall structure, wherein the diversion open channel comprises an early structure and a late structure:
[0005] The preliminary structure includes rear row piles, front row piles, crown beams, front and rear pile connecting beams, and bottom plate concrete;
[0006] The rear row piles and the front row piles are located on the river beach beside the construction pit, and adopt a steel-interlocked concrete pile structure. They are arranged in parallel along the original water flow direction, and the front row piles are close to one side of the construction pit.
[0007] The crown beams are cast on the tops of the rear row piles and the front row piles respectively;
[0008] A front and rear pile connecting beam is cast between the rear row piles and the front row piles;
[0009] A diversion cavity is formed by hollowing out between the rear row of piles and the front row of piles, and a bottom plate concrete is formed after the bottom of the diversion cavity is poured;
[0010] The aforementioned preliminary structure is used to guide the flow of water in the guiding cavity;
[0011] The later structure, based on the earlier structure, also includes diversion cavity backfill soil, river beach backfill soil, and concrete retaining wall;
[0012] The backfill soil of the diversion cavity is the soil between the piles excavated during diversion, and the soil is backfilled after the open channel diversion is completed;
[0013] The river beach backfill soil is the upper end of the diversion cavity backfill soil, and a concrete retaining wall is cast vertically at the upper end of the front row of piles, and the concrete retaining wall is higher than the river beach;
[0014] After the later structure is backfilled with soil, a permanent structure is formed.
[0015] On the other hand, the present application proposes a method for constructing an open diversion channel for internal flow of a bank retaining wall structure, the method comprising:
[0016] A pile driving machine is used to drive steel-interlocking concrete piles downward on the river beach. The cross section of the steel-interlocking concrete piles is circular. The steel-interlocking concrete piles include rear-row piles and front-row piles. The rear-row piles and the front-row piles are arranged in parallel along the original water flow direction, and the front-row piles are close to one side of the construction foundation pit.
[0017] After the construction of the rear and front rows of piles is completed, the pile heads are broken and the concrete cap beams of the rear and front rows of piles and the concrete front and rear pile connecting beams are poured;
[0018] Excavating the soil surrounded by the rear row of piles, the front row of piles and the front and rear pile connecting beams to form a diversion cavity;
[0019] Casting bottom plate concrete on the bottom surface of the diversion cavity, the diversion cavity is a temporary diversion channel for diverting the river water in the construction foundation pit;
[0020] After the construction foundation pit is completed, the diversion cavity is backfilled with soil by cutting off the upstream water flow;
[0021] Cast a concrete retaining wall at the upper end of the vertical front row of piles, and lay a mortar-laid stone retaining wall on the other side of the concrete retaining wall;
[0022] Backfill the riverbed soil.
[0023] The efficiency of the technical solution of the present invention includes:
[0024] First, it saves land. No additional land acquisition is required, which effectively solves the problem of land shortage.
[0025] Second, it saves investment. The temporary diversion channel is organically combined with the permanent structure, which significantly reduces the project investment cost.
[0026] The third is to shorten the construction period. Compared with the traditional phased diversion method, this solution greatly shortens the construction period and improves project efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 The present invention is a cross-sectional view of an open diversion channel for internal flow in a bank retaining wall structure.
[0028] Figure 2 The present invention is a plan view of an open diversion channel for internal flow in a bank protection retaining wall structure.
[0029] Figure 3 The present invention is a flow chart of a method for constructing an open diversion channel for internal flow through a bank retaining wall structure. DETAILED DESCRIPTION
[0030] The drawings of the present invention are only for illustrative purposes and should not be construed as limiting the present invention. In order to better illustrate the following embodiments, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.
[0031] This embodiment provides an open diversion channel for flow inside a bank retaining wall structure, such as Figure 1 and Figure 2 The diversion open channel includes an early structure and a late structure. The early structure is used for diversion. The late structure is backfilled on the basis of the early structure. The backfill soil is mainly excavated from the diversion project, so that the diversion function is organically combined with the permanent structure.
[0032] The preliminary structure includes rear row piles, front row piles, crown beams, front and rear pile connecting beams, and bottom plate concrete;
[0033] The rear row piles and the front row piles are located on the river beach beside the construction pit, and adopt a steel-interlocked concrete pile structure. They are arranged in parallel along the original water flow direction, and the front row piles are close to one side of the construction pit.
[0034] The distance between the back row piles of the traditional double-row pile structure is usually large. In order to achieve the diversion function and ensure that the open channel water does not leak out during the diversion period, the steel-interlocking cast-in-place pile structure is specially adopted in this embodiment. Among them, the plain pile plays a key role in preventing seepage, effectively preventing the water flow from hollowing out the soil between the piles, and ensuring the integrity and stability of the diversion channel.
[0035] The crown beams are cast on the tops of the rear row piles and the front row piles respectively;
[0036] A front and rear pile connecting beam is cast between the rear row piles and the front row piles;
[0037] A diversion cavity is formed by hollowing out between the rear row of piles and the front row of piles, and a bottom plate concrete is formed after the bottom of the diversion cavity is poured;
[0038] In order to prevent the soil at the bottom of the diversion channel from being washed away by water flow, a concrete face is used at the bottom of the diversion channel in this embodiment. This measure not only enhances the durability of the diversion channel, but also further improves the safety and reliability of the project.
[0039] The aforementioned preliminary structure is used to guide the flow of water in the guiding cavity;
[0040] The later structure, based on the earlier structure, also includes diversion cavity backfill soil, river beach backfill soil, and concrete retaining wall;
[0041] The backfill soil of the diversion cavity is the soil between the piles excavated during diversion, and the soil is backfilled after the open channel diversion is completed;
[0042] The river beach backfill soil is the upper end of the diversion cavity backfill soil, and a concrete retaining wall is cast vertically at the upper end of the front row of piles, and the concrete retaining wall is higher than the river beach;
[0043] Because the front row of piles are close to the river, during or after diversion, it is necessary to prevent seepage on both sides of the front row of piles. In addition to the above-mentioned concrete facing at the bottom, anti-seepage work must also be done on the top of the front row of piles. This implementation mentioned that the poured concrete retaining wall is connected to the front row of piles and anti-seepage is done. Because the concrete retaining wall is located on the river beach, it also has a safety protection function, that is, railings can be set on the concrete retaining wall.
[0044] After the later structure is backfilled with soil, a permanent structure is formed.
[0045] The double-row cast-in-place pile structure of the rear row piles and the front row piles usually bears the soil pressure on the rear side, and the front side is in a suspended state. Its stability mechanism mainly relies on the deadweight of the rear row piles and the soil between the piles to balance the soil pressure on the front row piles, thereby ensuring that the front row piles do not overturn and maintaining the stability of the overall structure. In this embodiment, water flows through the diversion cavity during diversion, and the soil between the traditional double-row piles is replaced by water. Under the premise of ensuring structural stability and safety, the diversion function during construction is achieved. This design not only significantly saves engineering land, reduces investment costs, and shortens construction period, but also provides a new solution for similar projects.
[0046] In some embodiments, the diversion open channel further includes a mortar-stone retaining wall, which is located on the river beach on the side of the rear row of piles. The mortar-stone retaining wall adopts a right-angle triangle structure, and the height of the mortar-stone retaining wall is higher than the ground height of the river beach. At the end of the embankment facing away from the river, the mortar-stone retaining wall can strengthen the embankment. At the same time, in order to dredge rainwater on the river beach, a ditch is also included at the top of the diversion open channel. The ditch is located on the river beach and uses a groove to drain water.
[0047] In some embodiments, a method for constructing an open diversion channel for internal flow of a bank retaining wall structure is also provided. Figure 3 , the method comprising:
[0048] S100, using a pile driving machine to drive steel-interlocked concrete piles downward on the river beach ground, wherein the cross-section of the steel-interlocked concrete piles is circular, and the steel-interlocked concrete piles include a rear row of piles and a front row of piles, wherein the rear row of piles and the front row of piles are arranged in parallel along the original water flow direction, and the front row of piles are close to one side of the construction foundation pit;
[0049] S102, after the construction of the rear row piles and the front row piles is completed, the pile heads are broken and the concrete cap beams of the rear row piles and the front row piles and the concrete front and rear pile connecting beams are poured;
[0050] S104, excavating the soil surrounded by the rear row of piles, the front row of piles and the front and rear pile connecting beams to form a diversion cavity;
[0051] S106, pouring a bottom plate concrete on the bottom surface of the diversion cavity, wherein the diversion cavity is a temporary diversion channel for diverting the river water in the construction foundation pit;
[0052] S108, after the construction of the foundation pit is completed, the diversion cavity is backfilled with soil by cutting off the upstream water flow;
[0053] S110, pouring a concrete retaining wall vertically at the upper end of the front row of piles, and laying a mortar-laid stone retaining wall on the other side of the concrete retaining wall;
[0054] S112, backfill riverbed soil.
[0055] In some embodiments, at the beginning of the project, a pile driving machine is first used to drive the rear row piles and the front row piles downward at the original ground at an elevation of 5.0m. The structure is a steel-interlocked concrete pile. The cross-section of the steel-interlocked concrete pile is circular, and the pile diameter is 0.8-1.0m. The distance between the front and rear row piles is calculated and determined according to the actual diversion requirements and permanent structure requirements, usually 3-8m.
[0056] After the construction of the rear and front rows of piles is completed, the pile heads are removed and the front and rear rows of concrete crown beams and concrete front and rear pile connecting beams are poured. The cross-sectional dimensions of the connecting beams are 0.8m×0.8m. The distance between the two connecting beams is determined according to structural calculations, generally 3-5m.
[0057] After the above structure is completed and formed into an integral whole, the soil surrounded by the rear row of piles, the front row of piles and the front and rear pile connecting beams is excavated to form a diversion cavity between the rear row of piles and the front row of piles.
[0058] Pour the bottom slab concrete, and dig out the cavity formed by the soil surrounded by the rear row of piles, the front row of piles and the front and rear pile connecting beams to serve as a temporary diversion channel. At this time, an open diversion channel is formed, which can effectively divert water from upstream to downstream and ensure dry land working conditions in the construction area.
[0059] After the open channel diversion task is completed, the diversion cavity is backfilled with soil by cutting off the upstream water flow.
[0060] The retaining wall was cast and the soil was backfilled, finally forming a complete permanent structural retaining wall and pavement system. At this time, the original river channel resumed its flow function, marking the successful completion of the project.
[0061] In some embodiments, a cofferdam is constructed upstream of the construction pit and downstream of the diversion channel entrance, and the cofferdam is connected to the front row of piles.
[0062] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the technical solution of the present invention, and are not intended to limit the specific implementation methods of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the claims of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. A diversion open channel for flow inside a bank retaining wall structure, characterized in that: The diversion open channel includes an early structure and a late structure: The preliminary structure includes rear row piles, front row piles, crown beams, front and rear pile connecting beams, and bottom plate concrete; The rear row piles and the front row piles are located on the river beach beside the construction pit, and adopt a steel-interlocked concrete pile structure. They are arranged in parallel along the original water flow direction, and the front row piles are close to one side of the construction pit. The crown beams are cast on the tops of the rear row piles and the front row piles respectively; A front and rear pile connecting beam is cast between the rear row piles and the front row piles; A diversion cavity is formed by hollowing out between the rear row of piles and the front row of piles, and a bottom plate concrete is formed after the bottom of the diversion cavity is poured; The aforementioned preliminary structure is used to guide the flow of water in the guiding cavity; The later structure, based on the earlier structure, also includes diversion cavity backfill soil, river beach backfill soil, and concrete retaining wall; The backfill soil of the diversion cavity is the soil between the piles excavated during diversion, and the soil is backfilled after the open channel diversion is completed; The river beach backfill soil is the upper end of the diversion cavity backfill soil, and a concrete retaining wall is cast vertically at the upper end of the front row of piles, and the concrete retaining wall is higher than the river beach; After the later structure is backfilled with soil, a permanent structure is formed.
2. The diversion open channel according to claim 1, characterized in that: The diversion open channel also includes a mortar-made stone retaining wall, which is located on the river beach on one side of the rear row of piles. The mortar-made stone retaining wall adopts a right-angled triangle structure, and the height of the mortar-made stone retaining wall is higher than the ground height of the river beach.
3. The diversion open channel according to claim 1, characterized in that: The diversion open channel also includes a ditch, which is located on the ground of the river beach and is in the form of a groove.
4. A method for constructing an open diversion channel for internal flow of a bank retaining wall structure, characterized in that: The method comprises: A pile driving machine is used to drive steel-interlocking concrete piles downward on the river beach. The cross section of the steel-interlocking concrete piles is circular. The steel-interlocking concrete piles include rear-row piles and front-row piles. The rear-row piles and the front-row piles are arranged in parallel along the original water flow direction, and the front-row piles are close to one side of the construction foundation pit. After the construction of the rear and front rows of piles is completed, the pile heads are broken and the concrete cap beams of the rear and front rows of piles and the concrete front and rear pile connecting beams are poured; Excavating the soil surrounded by the rear row of piles, the front row of piles and the front and rear pile connecting beams to form a diversion cavity; Casting bottom plate concrete on the bottom surface of the diversion cavity, the diversion cavity is a temporary diversion channel for diverting the river water in the construction foundation pit; After the construction foundation pit is completed, the diversion cavity is backfilled with soil by cutting off the upstream water flow; Cast a concrete retaining wall at the upper end of the vertical front row of piles, and lay a mortar-laid stone retaining wall on the other side of the concrete retaining wall; Backfill the riverbed soil.
5. The method according to claim 4, characterized in that The diameter of the steel interlocking concrete piles is 0.8-1.0m, and the distance between the rear row piles and the front row piles is 3-8m.
6. The method according to claim 4, characterized in that The cross-sectional dimensions of the front and rear pile connecting beams are 0.8m×0.8m, and the spacing between adjacent connecting beams is 3-5m.
7. The method according to claim 4, characterized in that The method further comprises: A cofferdam is constructed upstream of the construction pit and downstream of the diversion open channel entrance, and the cofferdam is connected to the front row of piles.