A prefabricated water transmission and distribution connection device and its renovation construction method

Abstract

The present invention belongs to the technical field of water supply and water conservancy projects, and discloses a prefabricated connection device for water transmission and distribution and a reconstruction construction method thereof. The prefabricated connection device for water transmission and distribution includes a prefabricated connection device body communicated with water channels in multiple directions, a water distribution gate, and a circumferential water stop belt; the water distribution gate is used to cut off the water flow flowing into or out of the water channel, and the circumferential water stop belt is arranged at the connection between the prefabricated connection device body and the water channel. The present invention can connect water transmission lines in multiple directions at any angle, has a simple structure and quick installation; through the reconstruction construction method of the prefabricated connection device for water transmission and distribution of the present invention, the construction period can be greatly shortened.

Description

Technical Field

[0001] The present invention belongs to the technical field of water and water conservancy projects, and particularly relates to a prefabricated connection device for water transmission and distribution and a reconstruction construction method thereof. Background Art

[0002] In engineering industries such as water conservancy and hydropower, and municipal water services, water transmission and distribution are often carried out through water conveyance channels, such as the form of culverts or tunnels. According to water use requirements, it is often necessary to bifurcate and connect the water transmission and distribution lines to divert water from multiple directions or distribute water to multiple directions to meet the water use in different regions; or combine with the water source situation to introduce new water sources into the original water transmission line, and it is necessary to set up a reconstruction section at the intersection of the lines for connection. Due to the different connection directions, the structural shape is complex, and most water transmission and distribution projects are related to the production and domestic water use of agriculture or cities. It is not possible to cut off water supply for a long time due to the construction of the connection section, otherwise it will seriously affect the safety of industrial and agricultural and domestic water use.

[0003] Currently, the commonly used connection method in engineering is the cast-in-place concrete structure. However, for large-scale water conservancy projects with large water transmission flow, the cast-in-place concrete is bulky, and the complex structure brings great difficulty to the construction formwork erection. For the connection section of the reconstruction project, in order to ensure timely water supply, there is not enough time for pouring and curing. This method of on-site production is difficult and takes a long construction period, and it is difficult to apply in some projects. Therefore, the existing connection methods and construction methods are difficult to meet the requirements of most projects. Summary of the Invention

[0004] The purpose of the present invention is to provide a prefabricated connection device for water transmission and distribution, which can connect water conveyance channels in multiple directions at any angle, has a simple structural shape, is fast to install, and greatly shortens the construction period.

[0005] The technical solution adopted by the present invention is a prefabricated connection device for water transmission and distribution, including a prefabricated connection device body connected to water conveyance channels in multiple directions, a water diversion gate, and a circumferential water stop belt; the water diversion gate is used to cut off the water flow flowing into or out of the water conveyance channel, and the circumferential water stop belt is arranged at the connection between the prefabricated connection device body and the water conveyance channel.

[0006] Preferably, the prefabricated connection device body includes a bottom plate unit, side wall units, a gate chamber, a top beam, and a reinforcement structure. The side wall units are arranged on both sides of the bottom plate unit to form a U-shaped channel for water conveyance; the gate chamber is arranged at the outlet of the U-shaped channel, and the water diversion gate is detachably arranged in the gate chamber; the top beam is located at the connection between the U-shaped channel and the water conveyance channel and is arranged on the top of the U-shaped channel, and the reinforcement structure is used to reinforce the bottom plate unit and the side wall units.

[0007] Preferably, both the bottom plate unit and the side wall units are provided with several pieces.

[0008] Preferably, the reinforcement structure includes a top cross beam and a top longitudinal beam. The top cross beam is arranged between two opposite side wall units, and the top longitudinal beam is arranged at the bifurcation of the water diversion line.

[0009] Preferably, a support rail and a water stop seat plate are installed on the lock chamber, and a double-sided water stop seal is installed on the diversion gate. The cross-sectional shape of the double-sided water stop seal is a double-headed P shape.

[0010] Preferably, the structures and dimensions of the lock chambers at the outlet of the U-shaped channel are the same.

[0011] Preferably, the bottom plate unit and the side wall unit are precast steel plate-concrete structures with grouting holes drilled in all stiffeners and cavities inside.

[0012] Preferably, the circumferential water stop belt includes a stainless steel V-shaped expansion water stop belt, a circumferential rubber water stop belt, and a stainless steel water stop pressing plate arranged in sequence from the outer layer to the inner layer. A number of pressing bolts are installed on the stainless steel water stop pressing plate.

[0013] Preferably, the cross-sectional shape of the connection between the precast connection device body and the water conveyance channel matches the cross-sectional shape of the water conveyance channel.

[0014] Preferably, it further includes a cover plate covering the top of the connection device body.

[0015] The present invention also provides a reconstruction construction method based on the above water conveyance precast connection device, including the following steps:

[0016] Step 1: Excavate and install two tracks and track foundations at the bottom of the original water conveyance channel, and backfill with gravel under the foundation.

[0017] Step 2: Fix and assemble the precast connection device on the track foundation. After assembly, temporarily cut off the water flow and demolish the original water conveyance channel.

[0018] Step 3: Horizontally move the precast connection device along the two tracks to the installation position, install the circumferential water stop belt, and then resume water supply.

[0019] Step 4: Pour concrete into the grid of the precast connection device and hoist the cover plate.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. Through the precast connection device body and the diversion gate connected to tunnels in multiple directions, the present invention can control the on-off of the water flow, realize simple and rapid reconstruction construction of the water conveyance line, can supply water immediately after installation, effectively ensure water use safety, and can connect water conveyance lines in multiple directions at any angle.

[0022] 2. The present invention can be manufactured and transported in sections through several bottom plate units and side wall units, and assembled in blocks during construction, enabling easy control of the overall installation accuracy and rapid completion of the manufacturing, transportation, and on-site installation of the device.

[0023] 3. In the present invention, water supply is restored first, and then concrete is poured into the beam grid of the prefabricated connection device, reducing the manufacturing and erection of on-site formwork and significantly shortening the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the "three-way" prefabricated connection device of the present invention;

[0025] Figure 2 Schematic structural diagram of the body of the "three-way" prefabricated connection device of the present invention;

[0026] Figure 3 Schematic layout diagram of the "three-way" water transmission and distribution project;

[0027] Figure 4 Schematic diagram of the renovation construction of the "three-way" water transmission and distribution project;

[0028] Figure 5 Is Figure 4 Cross-sectional structure diagram at A-A in

[0029] Figure 6 Schematic diagram of the "four-way" prefabricated connection device of the present invention;

[0030] Figure 7 Schematic structural diagram of the body of the "four-way" prefabricated connection device of the present invention;

[0031] Figure 8 Schematic layout diagram of the water transmission and distribution project of the "four-way" prefabricated connection device of the present invention.

[0032] In the figure: 1, body of the prefabricated connection device; 2, water distribution gate; 3, circumferential water stop; 4, cover plate; 5, track; 6, track foundation; 7, gravel backfill layer; 101, bottom plate unit; 102, side wall unit; 103, first lock chamber; 104, second lock chamber; 105, third lock chamber; 106, top beam; 107, top cross beam; 108, top longitudinal beam. DETAILED DESCRIPTION OF THE INVENTION

[0033] The present invention will be described in detail below with reference to the accompanying drawings.

[0034] Embodiment 1

[0035] As Figure 1 shown, the water transmission and distribution prefabricated connection device of this embodiment includes a body 1 of the prefabricated connection device, a water distribution gate 2, a circumferential water stop 3, and a cover plate 4.

[0036] As Figure 2 shown, the prefabricated connection device body 1 includes a bottom plate unit 101, side wall units 102, a first lock chamber 103, a second lock chamber 104, a top beam 106, and a reinforcement structure.

[0037] The water conveyance and prefabricated connection device of this embodiment is divided into two water diversion line branches by the main water diversion line. As Figure 3 shown, the prefabricated connection device body 1 is connected to the water conveyance channel, in the shape of a special-shaped "tee", and can connect water conveyance channels in three directions; the connection ends of the prefabricated connection device body 1 can be designed in different cross-sectional forms to match the cross-sections of the water conveyance channels on the water conveyance and distribution lines in each direction.

[0038] The side wall units 102 are arranged on both sides of the bottom plate unit 101. The bottom plate unit 101 and the side wall units 102 form a U-shaped channel for water conveyance. The U-shaped channel of this embodiment connects the main water diversion line and the two water diversion line branches. Water flows from the main water diversion line to the two water diversion line branches. The bottom plate unit 101 and the side wall units 102 are each provided with several pieces, which can be manufactured and transported in sections, and adjacent two bottom plate units 101 and side wall units 102 are fixedly connected.

[0039] The lock chambers include a first lock chamber 103 and a second lock chamber 104, which are respectively arranged at the outlets of the two U-shaped channels formed by the bottom plate unit 101 and the side wall units 102. The branch direction is determined according to the project requirements. A water diversion gate 2 is arranged in the lock chamber. The water diversion gate 2 is a steel plate welded or cast iron gate, which is used to cut off the water flow and select the water conveyance or distribution direction. Vertical stainless steel support rails and stainless steel water stop seat plates are installed on the lock chambers. The structural dimensions of each lock chamber are the same, and one water diversion gate can be shared.

[0040] The top beam 106 is located at the connection between the U-shaped channel and the water conveyance channel and is arranged at the top of the U-shaped channel. The two ends of the top beam 106 are respectively connected to the inner wall tops of the two side wall units 102. Further, the top beam 106 is horizontally arranged and perpendicular to the two side wall units 102. The top beam 106 is used to install the annular water stop 3.

[0041] The reinforcement structure includes a top cross beam 107 and a top longitudinal beam 108. The top cross beam 107 is arranged between the two opposite side wall units 102 in the middle section of the water diversion line branch, and several top cross beams 107 are arranged at intervals; the top longitudinal beam 108 is arranged at the water diversion line bifurcation and is used to connect the side wall units 102 on both sides. The two ends of the top longitudinal beam 108 are fixedly connected to the top cross beam 107. Both the top cross beam 107 and the top longitudinal beam 108 are used to improve the strength and stiffness of the prefabricated bifurcation structure.

[0042] The prefabricated connection device body 1 is a prefabricated steel plate-concrete structure on the outside, which is welded and assembled by steel plates. All stiffeners are drilled with slurry leakage holes to form a "U"-shaped through cavity along the cross-section of the channel. Concrete is poured into the internal cavity, and the flow-through surface is anti-corrosive with environmentally friendly paint.

[0043] In this embodiment, the main water diversion line is divided into two water diversion line branches. On each water diversion line branch, a water diversion gate 2 that can be opened and closed is provided. The on-off of the water diversion line branch can be controlled separately by opening and closing the water diversion gate 2. A double-sided water stop seal is installed on the water diversion gate 2, and the cross-sectional form of the double-sided water stop seal is a double-headed P shape.

[0044] The circumferential water stop belt 3 is arranged at the outer end of the gate chamber and is installed at the connection between the prefabricated connection device body 1 and the water conveyance channel during operation. The circumferential water stop belt 3 includes a stainless steel V-shaped expansion water stop belt, a circumferential rubber water stop belt, and a stainless steel water stop pressing plate arranged in sequence from the outer layer to the inner layer. A number of pressing bolts are installed on the stainless steel water stop pressing plate. The circumferential water stop belt 3 is used for anti-leakage water stop at the connection surface between the end of the steel plate-concrete structure on the outside of the prefabricated connection device body 1 and the water conveyance channel.

[0045] The cover plate 4 covers the top surface of the prefabricated connection device body 1 to prevent foreign objects from entering. The cover plate 4 is a prefabricated reinforced concrete structure plate or a steel structure.

[0046] The prefabricated connection device body 1, the water diversion gate 2, the circumferential water stop belt 3, and the cover plate 4 can all be prefabricated in advance and assembled into a whole on site. After the prefabricated connection device body 1 is assembled, it is adjusted and positioned by means such as hoisting, and the circumferential water stop belts at the connections in all directions are installed. After passing the acceptance, water can be passed through.

[0047] This embodiment also provides a reconstruction construction method for a water transmission and distribution prefabricated connection device, including the following steps:

[0048] Step 1: If the original water conveyance channel is reconstructed from a single water diversion line to two or three water diversion lines, the tunnel is still in the water conveyance state. Before the reconstruction construction, two tracks 5 and track foundations are excavated and installed at the bottom of the original water transmission and distribution tunnel, and the foundation is backfilled with crushed stones below;

[0049] Step 2: The connection device is welded and assembled on site near the positioning location and on the track 5. After the assembly is completed, the water flow can be temporarily cut off, and the original water conveyance channel is demolished;

[0050] Step 3: As shown in Figure 4 , the connection device is horizontally moved along the two tracks 5 by using two groups of jacks. By continuously moving forward the installation position of the jacks, the connection device is pushed until it is completely pushed to the installation position, and the circumferential water stop belt is installed and then the water flow is restored;

[0051] Step 4: Finally, concrete is poured into the grid of the connection device, and the prefabricated cover plate is hoisted.

[0052] Among them, the original water conveyance channel in Step 1 is of reinforced concrete structure, and the bottom of the structure can be partially excavated and a concrete track foundation can be poured; as Figure 5 shown, the track 5 is located on the track foundation 6, and the track foundation 6 is located on the gravel backfill layer 7.

[0053] In Step 3, the installation sequence of the circumferential water stop belt is as follows: the outermost layer is installed with a stainless steel V-shaped expansion water stop belt in a circumferential manner as the main water stop structure, and its width should connect the communicating device body and the water conveyance channel; circumferential rubber water stop belts are installed at both ends of the inner layer of the stainless steel water stop belt, and its width can ensure the water sealing of the installation bolts. The inner layer of the circumferential rubber water stop belt is installed with a stainless steel water stop pressing plate, and finally the pressing plate bolts are tightened.

[0054] In Step 3, the specific steps for horizontally moving the communicating device along the two tracks 5 by using two groups of jacks are as follows: butter is applied to the top surface of the track 5 to reduce friction. A channel steel is laid on each of the top surfaces of the two tracks 5, and the channel steel is buckled on the top surface of the track 5. The prefabricated communicating device is assembled on the channel steel. When pushing along the top surface of the track 5, the channel steel slides relative to the top surface of the track 5, and the channel steel remains relatively stationary with the communicating device.

[0055] For the water diversion and connection project, when the water diversion line in the direction of the first chamber 103 or the end water stop of the prefabricated bifurcation structure on this side is under maintenance, the shared water diversion gate 2 is lowered into the first chamber 103, and the water flow is introduced from the direction of the second chamber 104, which can ensure normal water supply to the main line. On the contrary, when the water diversion line in the direction of the second chamber 104 is under maintenance, the water diversion gate 2 is lowered into the second chamber 104, and the water flow is introduced from the direction of the first chamber 103, which can also ensure normal water supply to the main line.

[0056] For the water distribution line project, when the water distribution line in the direction of the first chamber 103 or the end water stop of the prefabricated bifurcation structure on this side is under maintenance, the shared water diversion gate 2 is lowered into the first chamber, and the water flow distributes water volume from the direction of the second chamber, which can ensure the maintenance of one water distribution line or give priority to water conveyance to another water distribution line. On the contrary, when the water distribution line in the direction of the second chamber 104 is under maintenance, the water diversion gate 2 is lowered into the second chamber 104, and the water flow distributes water in the direction of the first chamber, which can also ensure the line maintenance and normal water distribution.

[0057] Embodiment 2:

[0058] As Figures 6 to 8 shown, the difference from Embodiment 1 is that the main water diversion line in this embodiment is divided into 3 water diversion line branches, which is of a special-shaped "four-way" type and can connect the water conveyance channels of the main water diversion line and the three water diversion line branches.

[0059] The lock chamber of this embodiment includes a first lock chamber 103, a second lock chamber 104, and a third lock chamber 105, which are respectively arranged at the outlets of two U-shaped channels formed by a bottom plate unit 101 and a side wall unit 102, and the branching direction is determined according to engineering requirements.

Claims

1. A reconstruction construction method based on a prefabricated connection device for water transmission and distribution, characterized in that, The prefabricated connecting device for water supply and distribution comprises: a prefabricated connecting device body connected with water channels in multiple directions, a water diversion gate, and an annular water stop; the water diversion gate is used to cut off the water flow flowing into or out of the water channel, and the annular water stop is arranged at the connection between the prefabricated connecting device body and the water channel; the prefabricated connecting device body comprises a bottom plate unit, a side wall unit, a gate chamber, a top beam, and a reinforcement structure, and the side wall units are arranged on both sides of the bottom plate unit to form a U-shaped channel for water supply; the gate chamber is arranged at the outlet of the U-shaped channel, and the water diversion gate is detachable It is arranged in the gate chamber; the top beam is located at the connection between the U-shaped channel and the water conveyance channel and is arranged at the top of the U-shaped channel, and the reinforcement structure is used to reinforce the bottom plate unit and the side wall unit; the gate chamber is equipped with a support track and a water stop seat plate, and the diversion gate is equipped with a two-way water stop water seal, and the cross-section of the two-way water stop water seal is a double-headed P-type; the annular water stop belt includes a stainless steel V-shaped telescopic water stop belt, an annular rubber water stop belt and a stainless steel water stop pressure plate arranged in sequence from the outer layer to the inner layer, and a plurality of pressure plate bolts are installed on the stainless steel water stop pressure plate; The renovation construction method includes the following steps: Step 1: Excavate and install two tracks and track foundations at the bottom of the original water channel, and backfill the bottom of the foundation with gravel; Step 2: Fix and assemble the prefabricated connecting device on the track foundation, temporarily cut off the water flow after the assembly is completed, and dismantle the original water channel; Step 3: Move the prefabricated connecting device horizontally along the two tracks to the installation position, install the annular water stop strip and restore water flow; Step 4: Pour concrete into the prefabricated connecting device beam grid and hoist the cover plate.

2. The renovation construction method according to claim 1, wherein, The bottom plate unit and the side wall unit are both provided with a plurality of blocks.

3. The renovation construction method according to claim 1, wherein The reinforcement structure comprises a top cross beam and a top longitudinal beam. The top cross beam is arranged between two opposite side wall units, and the top longitudinal beam is arranged at the bifurcation of the water diversion line.

4. The renovation construction method according to claim 1, characterized in that, The structures and sizes of the gate chambers at the outlet of the U-shaped channel are the same.

5. The renovation construction method according to claim 1, characterized in that The bottom plate unit and the side wall unit are prefabricated outer steel plate-concrete structures, all the rib plates have mortar holes and have cavities inside.

6. The renovation construction method according to claim 1, characterized in that, The cross-sectional shape of the connection between the prefabricated connecting device body and the water channel matches the cross-sectional shape of the water channel.

7. The renovation construction method according to claim 1, characterized in that, It also includes a cover plate, which covers the top of the connecting device body.

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