Permanent and temporary combined layered sand blocking and water discharging structure and method

Abstract

The invention discloses a permanent and temporary combined layered sand blocking and water discharging structure which comprises a dam body, a slope type layered water inlet is formed in an upstream side slope face of the dam body, a three-way lock chamber is arranged at the bottom of the slope type layered water inlet, a downstream control gate is arranged at the bottom of the upstream side slope face of the dam body, and a buried pipe under the dam is arranged between the three-way lock chamber and the downstream control gate. The invention further discloses a permanent and temporary combined layered sand blocking and water discharging method. The method comprises the following steps that a construction area is selected; building a temporary diversion building structure; sequentially building a dam body and a slope type layered water inlet; after the dam body and the slope type layered water inlet are built, sand blocking and water discharging are achieved. According to the permanent and temporary combined layered sand blocking and water discharging structure and method, normal flow guiding can be achieved in the construction period, and the efficiency of depositing sand in water and discharging clear water after sand deposition of a sand blocking and water discharging facility is effectively improved by adopting the mode that water discharging is conducted through a buried pipe under a dam and segmented sand deposition of a slope type layered water inlet.

Description

Technical Field

[0001] The invention belongs to the technical field of sand blocking and water release, relates to a permanent and temporary combined layered sand blocking and water release structure, and also relates to a permanent and temporary combined layered sand blocking and water release method. Background Art

[0002] The purpose of the sand-blocking dam is to intercept the river sediment and discharge clean water during the flood season, reduce the sedimentation of the downstream river, improve the downstream ecological environment, and at the same time, silt can be used to create land in the upstream. At present, the construction of the sand-blocking dam mainly uses tunnels or buried pipes under the dam to discharge flood water, and later on, water is discharged by setting up a water discharge tower through the dragon raising its head. Due to the large load of the water discharge tower and the large amount of foundation treatment work, the project takes a long time and has a high investment.

[0003] In summary, the existing technology has the problem of long construction time and low efficiency of using water discharge towers to drain sand and water. Summary of the invention

[0004] The purpose of the present invention is to provide a permanent and temporary combined layered sand-blocking and water-draining structure, which solves the problems of long construction time and low efficiency of water-draining towers used in the prior art for sand-blocking and water-draining.

[0005] Another object of the present invention is to provide a permanent and temporary combined layered sand-blocking and water-releasing method.

[0006] The technical solution adopted by the present invention is to combine the stratified sand-blocking and water-release structure, including a dam body, a plurality of sloped stratified water inlets are arranged on the slope surface on the upstream side of the dam body, a second gate is arranged on the top of the sloped stratified water inlet, a three-way gate chamber is arranged at the bottom of the sloped stratified water inlet, the sloped stratified water inlet is connected with the eight-shaped wall water inlet through the three-way gate chamber, a downstream control gate is arranged at the bottom of the slope surface on the upstream side of the dam body, and an under-dam buried pipe is arranged between the three-way gate chamber and the downstream control gate.

[0007] The present invention is also characterized in that: The sloped stratified water inlet is arranged parallel to the slope surface on the upstream side of the dam body, and several sloped stratified water inlets are arranged parallel to each other.

[0008] The sloped stratified water inlet includes an inlet trough body, the cross-section of which is "U"-shaped, the bottom of which is fitted with the slope surface on the upstream side of the dam body, and a number of gates are arranged in the inlet trough body.

[0009] A plurality of gates are respectively connected to the second gate hoist, and both sides of the gates are movably connected to the water inlet tank body through L-shaped plates, and the L-shaped plates are relatively arranged on the inner wall of the top of the water inlet tank body.

[0010] A plurality of trash racks are arranged on the top of the inner side of the water inlet tank, and both sides of the trash racks are connected to the L-shaped plates respectively, and the plurality of trash racks are arranged in parallel; The bottoms of both sides of the water inlet trough are respectively in contact with the backfill earth, and the top end surface of the backfill earth and the upstream slope surface of the dam body are located in the same plane.

[0011] The three-way gate chamber includes a bottom plate, and the two ends of the upper side of the bottom plate are respectively fitted with the bottom of the water inlet of the eight-shaped wall and the bottom of the buried pipe under the dam. A breast wall is arranged on the upper side of the bottom plate close to one end of the water inlet of the eight-shaped wall, one side of the breast wall is fitted with the top of the water inlet of the eight-shaped wall, and the other side is fitted with an arc-shaped partition. The two ends of the breast wall and the arc-shaped partition are respectively fixed to the side walls, and the side walls are relatively arranged at the two ends of the upper side of the bottom plate; a blocking gate is movably arranged in the breast wall, and the blocking gate is respectively connected to the first gate hoist and the second gate hoist.

[0012] The bottom plate, side wall, breast wall and arc-shaped partition cooperate to form a closed cavity, and the opening of the closed cavity is respectively connected with the slope-type stratified water inlet, the eight-shaped wall water inlet and the buried pipe under the dam.

[0013] Another technical solution adopted by the present invention is a permanent combined layered sand blocking and water release method, comprising the following steps: Step 1: Select the construction area of ​​the Yonglin combined with layered sand-blocking and water-draining structure, and clean the topsoil in the construction area; Step 2: Build a temporary diversion building structure; Step 3: construct the dam body, the sloped stratified water inlet, and install the downstream control gate and the second hoist; Step 4: After the construction of the dam body and the sloped stratified water inlet is completed, the sand is intercepted and water is released through the coordinated use of the S-shaped wall water inlet, the three-way gate chamber, the sloped stratified water inlet, the buried pipe under the dam, the downstream control gate and the second hoist.

[0014] Another technical solution of the present invention is also characterized in that: The temporary diversion building structure includes a three-way lock chamber, an eight-shaped wall water inlet, and buried pipes under the dam; Step 2 includes the following steps: first build a three-way lock chamber, and after the three-way lock chamber is built, build an eight-shaped wall water inlet and buried pipes under the dam, and after the eight-shaped wall water inlet and buried pipes under the dam are built, the construction of the temporary diversion building structure is completed.

[0015] Step 4 includes the following steps: after the dam body and the sloped stratified water inlet are constructed, the downstream control gate is closed, the dam body intercepts the water flow, all the gates in the sloped stratified water inlet are opened, the uppermost gate is closed, the mud and sand in the water flow are precipitated in the sloped stratified water inlet, and when the mud and sand accumulation in front of the closed gate in the sloped stratified water inlet reaches a set value, another gate below the gate is opened, and so on, until all the gates are opened; when the water quality index of the water flow intercepted by the dam body reaches a set value, the downstream control gate is opened to discharge clean water to reduce the water level of the water flow intercepted upstream of the dam body; Water quality indicators include sediment content, turbidity, and suspended matter concentration.

[0016] The beneficial effects of the present invention are as follows: the present invention first constructs a temporary diversion building structure, so that normal diversion can be achieved during the construction of the permanent and temporary combined layered sand-blocking and water-release structure, thereby reducing the amount of engineering construction; after the permanent and temporary combined layered sand-blocking and water-release structure is constructed, mud and sand in the water are precipitated at a number of sloped layered water inlets, and a number of gates are arranged at intervals in the sloped layered water inlets to divide them into several sections, and the gates are closed in sequence from top to bottom during the mud and sand deposition process, so that the amount of mud and sand deposited in the dam body is maximized, and after the water quality index of the intercepted and stored water reaches the set value, the downstream control gate is opened to slowly discharge clean water; the present invention adopts a combination of water discharge through buried pipes under the dam and segmented mud and sand deposition at the sloped layered water inlet, which effectively improves the efficiency of sand-blocking and water-release facilities in depositing mud and sand in the water and discharging clean water after the mud and sand deposition. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a top view of the permanent and temporary combined layered sand-blocking and water-releasing structure of the present invention; Figure 2 It is a cross-sectional view of the permanent and temporary combined layered sand-blocking and water-releasing structure of the present invention; Figure 3 It is a structural schematic diagram of a slope-type layered water inlet in a permanent and temporary combined layered sand-blocking and water-releasing structure of the present invention; Figure 4 It is a structural schematic diagram of a three-way gate chamber in a permanent and temporary combined layered sand-blocking and water-releasing structure of the present invention; Figure 5 It is a cross-sectional view of a three-way gate chamber in a permanent and temporary combined layered sand-blocking and water-releasing structure of the present invention.

[0018] In the figure, 1. Sloped stratified water inlet; 1-1. Water inlet trough; 1-2. L-shaped plate; 1-3. Gate; 1-4. Trash rack; 1-5. Backfill; 2. Three-way gate chamber; 2-1. Bottom plate; 2-2. Side wall; 2-3. Breast wall; 2-4. Arc partition; 2-5. Blocking gate; 2-6. First hoist; 3. S-shaped wall water inlet; 4. Under-dam buried pipe; 5. Downstream control gate; 6. Second hoist; 7. Dam body. DETAILED DESCRIPTION

[0019] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Yonglin combined with a layered sand-blocking and water-release structure, comprises a dam body 7, a plurality of sloped layered water inlets 1 are arranged on the upstream slope surface of the dam body 7, a second gate 6 is arranged on the top of the sloped layered water inlet 1, a three-way gate chamber 2 is arranged at the bottom of the sloped layered water inlet 1, the sloped layered water inlet 1 is connected with the eight-shaped wall water inlet 3 through the three-way gate chamber 2, a downstream control gate 5 is arranged at the bottom of the upstream slope surface of the dam body 7, and an under-dam buried pipe 4 is arranged between the three-way gate chamber 2 and the downstream control gate 5.

[0021] The sloped stratified water inlet 1 is arranged parallel to the upstream slope surface of the dam body 7 , and a plurality of sloped stratified water inlets 1 are arranged parallel to each other.

[0022] The sloped stratified water inlet 1 comprises a water inlet trough 1-1, the cross section of which is "U"-shaped, the bottom of which is fitted with the slope surface on the upstream side of the dam body 7, and a plurality of gates 1-3 are arranged in the water inlet trough 1-1. The plurality of gates 1-3 are respectively connected to the second gate hoist 6, and both sides of the gates 1-3 are movably connected to the water inlet trough 1-1 through L-shaped plates 1-2, and the L-shaped plates 1-2 are relatively arranged on the inner wall of the top of the water inlet trough 1-1; a plurality of trash racks 1-4 are arranged on the top of the inner side of the water inlet trough 1-1, and both sides of the trash racks 1-4 are respectively connected to the L-shaped plates 1-2, and the plurality of trash racks 1-4 are arranged in parallel; the bottoms of both sides of the water inlet trough 1-1 are respectively fitted with the backfill 1-5, and the top end faces of the backfill 1-5 are located in the same plane as the slope surface on the upstream side of the dam body 7.

[0023] The three-way lock chamber 2 includes a bottom plate 2-1, and the two ends of the upper side of the bottom plate 2-1 are respectively fitted with the bottom of the water inlet 3 of the eight-shaped wall and the bottom of the buried pipe 4 under the dam. A breast wall 2-3 is arranged on the upper side of the bottom plate 2-1 near one end of the water inlet 3 of the eight-shaped wall. One side of the breast wall 2-3 is fitted with the top of the water inlet 3 of the eight-shaped wall, and the other side is fitted with an arc-shaped partition 2-4. The breast wall 2-3 and the arc-shaped partition 2-4 are respectively fixedly connected to the side walls 2-2 at both ends, and the side walls 2-2 are relatively arranged at the two ends of the upper side of the bottom plate 2-1; a blocking gate 2-5 is movably arranged in the breast wall 2-3, and the blocking gate is respectively connected to the first hoist 2-6 and the second hoist 6.

[0024] The bottom plate 2-1, the side wall 2-2, the breast wall 2-3 and the arc-shaped partition plate 2-4 cooperate to form a closed cavity, and the opening of the closed cavity is respectively connected with the slope-type layered water inlet 1, the eight-shaped wall water inlet 3 and the buried pipe 4 under the dam.

[0025] Yonglin combined the layered sand blocking and water release method, including the following steps: Step 1: Select the construction area of ​​the Yonglin combined with layered sand-blocking and water-draining structure, and clean the topsoil in the construction area; Step 2: Build a temporary diversion building structure; The temporary diversion building structure includes a three-way lock chamber 2, an eight-shaped wall water inlet 3, and a buried pipe under the dam 4; First, the three-way lock chamber 2 is constructed. After the three-way lock chamber 2 is constructed, the eight-shaped wall water inlet 3 and the buried pipe 4 under the dam are constructed. After the eight-shaped wall water inlet 3 and the buried pipe 4 under the dam are constructed, the construction of the temporary diversion building structure is completed.

[0026] Step 3: construct the dam body 7, the sloped stratified water inlet 1, and install the downstream control gate 5 and the second hoist 6 in sequence; Step 4: After the dam body 7 and the sloped stratified water inlet 1 are constructed, sand blocking and water release are achieved through the coordinated use of the splayed wall water inlet 3, the three-way gate chamber 2, the sloped stratified water inlet 1, the buried pipe under the dam 4, the downstream control gate 5 and the second hoist 6; After the dam body 7 and the sloped stratified water inlet 1 are constructed, the downstream control gate 5 is closed, the dam body 7 intercepts the water flow, the gates 1-3 in the sloped stratified water inlet 1 are all opened, the uppermost gate 1-3 is closed, the mud and sand in the water flow are precipitated in the sloped stratified water inlet 1, and when the mud and sand accumulation in front of the closed gate 1-3 in the sloped stratified water inlet 1 reaches a set value, another gate 1-3 below the gate 1-3 is opened, and so on, until all the gates 1-3 are opened; when the water quality index of the water flow intercepted by the dam body 7 reaches a set value, the downstream control gate 5 is opened to discharge clean water to reduce the water level of the water flow intercepted and stored upstream of the dam body 7; Water quality indicators include sediment content, turbidity, and suspended matter concentration.

[0027] Example 1 This embodiment proposes a permanent and temporary combined layered sand-blocking and water-releasing structure, such as Figure 1 and Figure 2 As shown, it includes a dam body 7, a plurality of sloped stratified water inlets 1 are arranged on the upstream slope surface of the dam body 7, a second gate 6 is arranged on the top of the sloped stratified water inlet 1, a three-way gate chamber 2 is arranged at the bottom of the sloped stratified water inlet 1, the sloped stratified water inlet 1 is connected with the eight-shaped wall water inlet 3 through the three-way gate chamber 2, a downstream control gate 5 is arranged at the bottom of the upstream slope surface of the dam body 7, and an under-dam buried pipe 4 is arranged between the three-way gate chamber 2 and the downstream control gate 5.

[0028] Example 2 This embodiment proposes a permanent and temporary combined layered sand-blocking and water-releasing structure, such as Figure 1 and Figure 2 As shown, it includes a dam body 7, a plurality of sloped stratified water inlets 1 are arranged on the upstream slope surface of the dam body 7, a second gate 6 is arranged on the top of the sloped stratified water inlet 1, a three-way gate chamber 2 is arranged at the bottom of the sloped stratified water inlet 1, the sloped stratified water inlet 1 is connected with the eight-shaped wall water inlet 3 through the three-way gate chamber 2, a downstream control gate 5 is arranged at the bottom of the upstream slope surface of the dam body 7, and an under-dam buried pipe 4 is arranged between the three-way gate chamber 2 and the downstream control gate 5.

[0029] The sloped stratified water inlet 1 is arranged parallel to the upstream slope surface of the dam body 7, and several sloped stratified water inlets 1 are arranged parallel to each other. Figure 3 As shown, the sloped stratified water inlet 1 includes an inlet trough body 1-1, the cross section of which is "U"-shaped, the bottom of which is fitted with the slope surface on the upstream side of the dam body 7, and a plurality of gates 1-3 are arranged in the inlet trough body 1-1.

[0030] Example 3 This embodiment proposes a permanent and temporary combined layered sand-blocking and water-releasing structure, such as Figure 1 and Figure 2 As shown, it includes a dam body 7, a plurality of sloped stratified water inlets 1 are arranged on the upstream slope surface of the dam body 7, a second gate 6 is arranged on the top of the sloped stratified water inlet 1, a three-way gate chamber 2 is arranged at the bottom of the sloped stratified water inlet 1, the sloped stratified water inlet 1 is connected with the eight-shaped wall water inlet 3 through the three-way gate chamber 2, a downstream control gate 5 is arranged at the bottom of the upstream slope surface of the dam body 7, and an under-dam buried pipe 4 is arranged between the three-way gate chamber 2 and the downstream control gate 5.

[0031] The sloped stratified water inlet 1 is arranged parallel to the upstream slope surface of the dam body 7, and several sloped stratified water inlets 1 are arranged parallel to each other. Figure 3 As shown, the sloped stratified water inlet 1 includes a water inlet trough 1-1, the cross section of the water inlet trough 1-1 is "U"-shaped, the bottom of the water inlet trough 1-1 is arranged to fit with the slope surface on the upstream side of the dam body 7, and a plurality of gates 1-3 are arranged in the water inlet trough 1-1. The plurality of gates 1-3 are respectively connected to the second hoist 6, and the two sides of the gates 1-3 are movably connected to the water inlet trough 1-1 through L-shaped plates 1-2, and the L-shaped plates 1-2 are relatively arranged on the inner wall of the top of the water inlet trough 1-1; a plurality of trash racks 1-4 are arranged on the top of the inner side of the water inlet trough 1-1, and the two sides of the trash racks 1-4 are respectively connected to the L-shaped plates 1-2, and the plurality of trash racks 1-4 are arranged in parallel; the bottoms of the two sides of the water inlet trough 1-1 are respectively fitted with the backfill earthwork 1-5, and the top end surface of the backfill earthwork 1-5 and the slope surface on the upstream side of the dam body 7 are located in the same plane.

[0032] Example 4 This embodiment proposes a permanent and temporary combined layered sand-blocking and water-releasing structure, such as Figure 1 and Figure 2 As shown, it includes a dam body 7, a plurality of sloped stratified water inlets 1 are arranged on the upstream slope surface of the dam body 7, a second gate 6 is arranged on the top of the sloped stratified water inlet 1, a three-way gate chamber 2 is arranged at the bottom of the sloped stratified water inlet 1, the sloped stratified water inlet 1 is connected with the eight-shaped wall water inlet 3 through the three-way gate chamber 2, a downstream control gate 5 is arranged at the bottom of the upstream slope surface of the dam body 7, and an under-dam buried pipe 4 is arranged between the three-way gate chamber 2 and the downstream control gate 5.

[0033] The sloped stratified water inlet 1 is arranged parallel to the upstream slope surface of the dam body 7, and several sloped stratified water inlets 1 are arranged parallel to each other. Figure 3As shown, the sloped stratified water inlet 1 includes a water inlet trough 1-1, the cross section of the water inlet trough 1-1 is "U"-shaped, the bottom of the water inlet trough 1-1 is arranged to fit with the slope surface on the upstream side of the dam body 7, and a plurality of gates 1-3 are arranged in the water inlet trough 1-1. The plurality of gates 1-3 are respectively connected to the second hoist 6, and the two sides of the gates 1-3 are movably connected to the water inlet trough 1-1 through L-shaped plates 1-2, and the L-shaped plates 1-2 are relatively arranged on the inner wall of the top of the water inlet trough 1-1; a plurality of trash racks 1-4 are arranged on the top of the inner side of the water inlet trough 1-1, and the two sides of the trash racks 1-4 are respectively connected to the L-shaped plates 1-2, and the plurality of trash racks 1-4 are arranged in parallel; the bottoms of the two sides of the water inlet trough 1-1 are respectively fitted with the backfill earthwork 1-5, and the top end surface of the backfill earthwork 1-5 and the slope surface on the upstream side of the dam body 7 are located in the same plane.

[0034] Combination Figure 4 and Figure 5 As shown, the three-way lock chamber 2 includes a bottom plate 2-1, the two ends of the upper side of the bottom plate 2-1 are respectively fitted with the bottom of the splayed wall water inlet 3 and the bottom of the buried pipe 4 under the dam, a breast wall 2-3 is arranged on the upper side of the bottom plate 2-1 near one end of the splayed wall water inlet 3, one side of the breast wall 2-3 is fitted with the top of the splayed wall water inlet 3, and the other side is fitted with an arc-shaped partition 2-4, the breast wall 2-3 and the arc-shaped partition 2-4 are respectively fixed to the side wall 2-2, and the side wall 2-2 is relatively arranged at the two ends of the upper side of the bottom plate 2-1; a blocking gate 2-5 is movably arranged in the breast wall 2-3, and the blocking gate is respectively connected to the first hoist 2-6 and the second hoist 6. The bottom plate 2-1, the side wall 2-2, the breast wall 2-3, and the arc-shaped partition 2-4 form a closed cavity, and the opening of the closed cavity is respectively connected to the slope-type stratified water inlet 1, the splayed wall water inlet 3, and the buried pipe 4 under the dam.

[0035] Example 5 This embodiment proposes a permanent and temporary combined layered sand interception and water release method, including the following steps: Step 1: Select the construction area of ​​the Yonglin combined with layered sand-blocking and water-draining structure, and clean the topsoil in the construction area; Step 2: Build a temporary diversion building structure; Step 3: construct the dam body 7, the sloped stratified water inlet 1, and install the downstream control gate 5 and the second hoist 6 in sequence; Step 4: After the dam body 7 and the sloped stratified water inlet 1 are constructed, sand is intercepted and water is released through the coordinated use of the splayed wall water inlet 3, the three-way gate chamber 2, the sloped stratified water inlet 1, the buried pipe under the dam 4, the downstream control gate 5 and the second hoist 6.

[0036] Example 6 This embodiment proposes a permanent and temporary combined layered sand interception and water release method, including the following steps: Step 1: Select the construction area of ​​the Yonglin combined with layered sand-blocking and water-draining structure, and clean the topsoil in the construction area; Step 2: Build a temporary diversion building structure; The temporary diversion building structure includes a three-way lock chamber 2, an eight-shaped wall water inlet 3, and a buried pipe under the dam 4; First, construct the three-way lock chamber 2. After the three-way lock chamber 2 is constructed, construct the eight-shaped wall water inlet 3 and the buried pipe 4 under the dam. After the eight-shaped wall water inlet 3 and the buried pipe 4 under the dam are constructed, the construction of the temporary diversion building structure is completed; Step 3: construct the dam body 7, the sloped stratified water inlet 1, and install the downstream control gate 5 and the second hoist 6 in sequence; Step 4: After the dam body 7 and the sloped stratified water inlet 1 are constructed, sand blocking and water release are achieved through the coordinated use of the splayed wall water inlet 3, the three-way gate chamber 2, the sloped stratified water inlet 1, the buried pipe under the dam 4, the downstream control gate 5 and the second hoist 6; After the dam body 7 and the sloped stratified water inlet 1 are constructed, the downstream control gate 5 is closed, the dam body 7 intercepts the water flow, the gates 1-3 in the sloped stratified water inlet 1 are all opened, the uppermost gate 1-3 is closed, the mud and sand in the water flow are precipitated in the sloped stratified water inlet 1, and when the mud and sand accumulation in front of the closed gate 1-3 in the sloped stratified water inlet 1 reaches a set value, another gate 1-3 below the gate 1-3 is opened, and so on, until all the gates 1-3 are opened; when the water quality index of the water flow intercepted by the dam body 7 reaches a set value, the downstream control gate 5 is opened to discharge clean water to reduce the water level of the water flow intercepted and stored upstream of the dam body 7; Water quality indicators include sediment content, turbidity, and suspended matter concentration.

[0037] The sloped stratified water inlet 1 in the embodiment of the present invention is located on the upstream slope of the dam body 7, and is arranged perpendicular to the axis of the dam, and mainly provides sand blocking during operation; the water inlet tank body 1-1 is the main load-bearing and water-passing structure, and an anti-skid platform is arranged every 5m to 10m on the bottom plate of the water inlet tank body 1-1, and a notch is arranged on the top of the side wall of the water inlet tank body 1-1, which adopts a reinforced concrete structure, and the concrete strength grade is not less than C30; the L-shaped plate 1-2 is arranged in the notch of the side wall of the water inlet tank body 1-1, and is connected to the tank body by welding with embedded steel bars, and its main function is to prevent stress concentration from damaging the tank body, and at the same time reduce the friction when the gate 1-3 is opened and closed; the gate 1-3 is arranged on the upper part of the L-shaped plate 1-2, and as the reservoir As the amount of siltation increases, gates 1-3 are lowered one by one to block sand. The thickness of the gates is not less than 30 cm, and the width is not greater than the net width of the water inlet trough 1-1 and not less than 30 cm. A reinforced concrete structure is adopted, and the concrete strength grade is not less than C30; trash racks 1-4 are arranged on the top of the side wall of the water inlet trough 1-1, and at the same time, a gap of not less than 5 cm is maintained between each other on the upper part of the gates 1-3, mainly to prevent dead branches and leaves in the reservoir area from entering the water inlet and blocking the operation of the structure. It is mainly composed of round stainless steel pipes, which are connected to the water inlet trough 1-1 by welding with pre-buried steel bars; backfill earthwork 1-5 is to backfill the excavated troughs formed on both sides when building the water inlet trough 1-1 with original soil, in order to keep the dam body smooth.

[0038] The three-way lock chamber 2 is set at the foot of the slope of the water-facing surface of the dam body 7, and the structure is in the form of a three-way pipe; the bottom plate 2-1 is set at the bottom of the overall structure of the three-way lock chamber 2, which is a rectangular plate structure and is built with reinforced concrete. The concrete strength grade is not less than C30. The elevation of the bottom plate 2-1 is 30cm to 50cm lower than the bottom plate of the eight-shaped wall water inlet 3 and the buried pipe 4 under the dam, forming a water cushion, which plays a certain energy dissipation role in the early stage of operation and protects the bottom plate 2-1; the side walls 2-2 are symmetrically arranged on both sides above the bottom plate 2-1, and are integrally cast-in-place connected with the bottom plate 2-1. They are of reinforced concrete structure, and the concrete strength grade is not less than C30; the breast wall 2-3 is set on the side wall 2-2 is located above the upstream side, and its main function is to block water and provide support for the blocking gate 2-5. It adopts a reinforced concrete structure with a concrete strength grade of not less than C30; the arc-shaped partition 2-4 is arranged above the downstream side of the side wall 2-2 to divert the water flow at the water inlet. It adopts a reinforced concrete structure with a concrete strength grade of not less than C30; the blocking gate 2-5 is arranged upstream of the three-way gate chamber 2, and can be closed and blocked after the main construction is completed. It adopts a reinforced concrete structure with a concrete strength grade of not less than C30; the first hoist 2-6 provides power for the blocking gate 2-5, so that the gate closes slowly to prevent the structure from being damaged.

[0039] The eight-shaped wall water inlet 3 is arranged upstream of the three-way gate chamber 2. Its main function is to guide the water flow into the buried pipe 4 under the dam. It adopts a reinforced concrete structure with a concrete strength grade of not less than C25; the buried pipe 4 under the dam is arranged downstream of the three-way gate chamber 2. Its main function is to divert water during the construction period and release water during the operation period. The outer part is trapezoidal. The trapezoidal shape is mainly convenient for backfilling and compacting the dam body. It adopts a reinforced concrete structure with a concrete strength grade of not less than C30; the downstream control gate 5 is arranged at the end of the buried pipe 4 under the dam. It is mainly used to control the flow and water pressure, so that the entire structure has water pressure, controls the downstream flow, and provides conditions for the sedimentation of muddy water in the reservoir area; the second hoist 6 is arranged at the top of the sloped stratified water inlet 1 and fixed on the top platform to facilitate the control of the gates 1-3 to slide down smoothly.

[0040] During the construction of the permanent combined with layered sand retaining and water release structure in the embodiment of the present invention, the temporary diversion building structure diverts normally, and after the construction period is completed, the blocking gates 2-5 can be lowered; during the operation period after the permanent combined with layered sand retaining and water release structure is completed, before the flood comes, the downstream control gate 5 is closed, and the permanent combined with layered sand retaining and water release structure retains floods and sand, and sedimentation occurs for two to three days, and the siltation in front of the dam increases. Subsequently, the downstream control gate 5 is slowly opened to discharge clear water, and the reservoir water level is lowered; when the siltation elevation in front of the dam reaches a distance of less than 1m from the top of another gate 1-3 below, the adjacent gate 1-3 below is closed, and so on, until all gates 1-3 are lowered and the sand retaining dam reaches the design capacity, and then it is processed according to relevant specifications in the later stage.

[0041] The present invention adopts a permanent and temporary combined layered sand-blocking and water-draining structure, eliminates the construction of a water-draining tower, solves the problem of sharing a water-draining pipe during diversion in the construction period and water-draining in the operation period, shortens the construction period, and reduces the project investment.

Claims

1. Permanent and temporary combined layered sand-blocking and water-releasing structure, characterized in that: The invention comprises a dam body (7), wherein a plurality of slope-type stratified water inlets (1) are arranged on the upstream slope surface of the dam body (7), a second gate hoist (6) is arranged on the top of the slope-type stratified water inlet (1), a three-way gate chamber (2) is arranged at the bottom of the slope-type stratified water inlet (1), the slope-type stratified water inlet (1) is connected with the eight-shaped wall water inlet (3) through the three-way gate chamber (2), a downstream control gate (5) is arranged at the bottom of the upstream slope surface of the dam body (7), and an under-dam buried pipe (4) is arranged between the three-way gate chamber (2) and the downstream control gate (5).

2. The permanent and temporary combined layered sand-blocking and water-draining structure according to claim 1 is characterized in that: The sloped stratified water inlet (1) is arranged parallel to the upstream slope surface of the dam body (7), and a plurality of the sloped stratified water inlets (1) are arranged parallel to each other.

3. The permanent and temporary combined layered sand-blocking and water-draining structure according to claim 2 is characterized in that: The sloped stratified water inlet (1) comprises a water inlet trough body (1-1), the cross section of the water inlet trough body (1-1) is U-shaped, the bottom of the water inlet trough body (1-1) is arranged to fit the slope surface on the upstream side of the dam body (7), and a plurality of gates (1-3) are arranged in the water inlet trough body (1-1).

4. The permanent and temporary combined layered sand-blocking and water-draining structure according to claim 3 is characterized in that: The plurality of gates (1-3) are respectively connected to the second hoist (6); both sides of the gates (1-3) are movably connected to the water inlet tank body (1-1) via L-shaped plates (1-2); and the L-shaped plates (1-2) are relatively arranged on the inner wall of the top of the water inlet tank body (1-1).

5. The permanent and temporary combined layered sand-blocking and water-draining structure according to claim 4 is characterized in that: A plurality of trash racks (1-4) are arranged on the top of the inner side of the water inlet tank body (1-1), the two sides of the trash rack (1-4) are respectively connected to the L-shaped plate (1-2), and the plurality of trash racks (1-4) are arranged in parallel; The bottoms of both sides of the water inlet trough body (1-1) are respectively in contact with the backfill earth (1-5), and the top end surface of the backfill earth (1-5) and the upstream slope surface of the dam body (7) are located in the same plane.

6. The permanent and temporary combined layered sand-blocking and water-draining structure according to claim 5 is characterized in that: The three-way lock chamber (2) comprises a bottom plate (2-1), the two ends of the upper side of the bottom plate (2-1) are respectively fitted with the bottom of the eight-shaped wall water inlet (3) and the bottom of the buried pipe (4) under the dam, a breast wall (2-3) is arranged on the upper side of the bottom plate (2-1) near one end of the eight-shaped wall water inlet (3), one side of the breast wall (2-3) is fitted with the top of the eight-shaped wall water inlet (3), and the other side is fitted with an arc-shaped partition (2-4), the breast wall (2-3) and the arc-shaped partition (2-4) are respectively fixedly connected to the side wall (2-2), and the side wall (2-2) is relatively arranged at the two ends of the upper side of the bottom plate (2-1); a blocking gate (2-5) is movably arranged in the breast wall (2-3), and the blocking gate is respectively connected to the first hoist (2-6) and the second hoist (6).

7. The permanent and temporary combined layered sand-blocking and water-draining structure according to claim 6 is characterized in that: The bottom plate (2-1), the side wall (2-2), the breast wall (2-3), and the arc-shaped partition plate (2-4) cooperate to form a closed cavity, and the opening of the closed cavity is respectively connected to the slope-type layered water inlet (1), the eight-shaped wall water inlet (3), and the buried pipe (4) under the dam.

8. A method for combining permanent and temporary stratified sand interception and water release, characterized in that: The permanent and temporary combined layered sand-blocking and water-releasing structure according to claim 4 comprises the following steps: Step 1: Select the construction area of ​​the Yonglin combined with layered sand-blocking and water-draining structure, and clean the topsoil in the construction area; Step 2: Build a temporary diversion building structure; Step 3: sequentially construct the dam body (7), the sloped stratified water inlet (1), and install the downstream control gate (5) and the second hoist (6); Step 4: After the dam body (7) and the sloped stratified water inlet (1) are constructed, sand interception and water release are achieved through the coordinated use of the splayed wall water inlet (3), the three-way gate chamber (2), the sloped stratified water inlet (1), the buried pipe under the dam (4), the downstream control gate (5) and the second hoist (6).

9. The permanent and temporary combined layered sand blocking and water release method according to claim 8 is characterized in that: The temporary diversion building structure comprises a three-way gate chamber (2), an eight-shaped wall water inlet (3), and a buried pipe under the dam (4); The step 2 comprises the following steps: firstly constructing a three-way lock chamber (2); after the three-way lock chamber (2) is constructed, constructing an eight-shaped wall water inlet (3) and a buried pipe under the dam (4); after the eight-shaped wall water inlet (3) and the buried pipe under the dam (4) are constructed, the construction of the temporary diversion building structure is completed.

10. The permanent and temporary combined layered sand blocking and water release method according to claim 8 is characterized in that: The step 4 comprises the following steps: after the dam body (7) and the sloped stratified water inlet (1) are constructed, the downstream control gate (5) is closed, the dam body (7) intercepts the water flow, the gates (1-3) in the sloped stratified water inlet (1) are all opened, the gate (1-3) at the top is closed, the mud and sand in the water flow in the sloped stratified water inlet (1) are precipitated, and when the amount of mud and sand deposited in front of the closed gate (1-3) in the sloped stratified water inlet (1) reaches a set value, another gate (1-3) below the gate (1-3) is opened, and so on, until all the gates (1-3) are opened; when the water quality index of the water flow intercepted by the dam body (7) reaches a set value, the downstream control gate (5) is opened to discharge clean water, thereby lowering the water level of the water flow intercepted upstream of the dam body (7); The water quality indicators include sand content, turbidity, and suspended matter concentration.

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