Reservoir water intake control well construction method

Abstract

The invention relates to a construction method of a reservoir water intake control well. The construction method comprises the following steps: step 1, early-stage construction preparation and upper slope support construction; secondly, the vertical shaft is excavated and supported to the bottom of the vertical shaft, and concrete is used for sealing the bottom; 3, low-water-level water taking pipe construction; 4, water is introduced into a low-water-level water taking pipe; 5, high-water-level water taking pipe construction; sixthly, a high platform (a steel platform) is constructed; seventhly, the steel platform is utilized, and the control well continues to be constructed to the top; and 8, subsequent construction is ended, the formwork and the steel platform are dismantled, and control well construction is completed. According to the method, the construction period is shortened, the cost is reduced, the engineering quality is guaranteed, beneficial practical experience and theoretical guidance are provided for development of the construction technology of the water intake control well of the reservoir, and beneficial reference can be provided for implementation of subsequent similar engineering.

Description

Technical Field

[0001] The invention relates to the field of water conservancy projects, in particular to a construction method for a reservoir water intake control well. Background Art

[0002] With the acceleration of urbanization and the continuous growth of population, the demand for urban water supply systems is becoming increasingly urgent. An effective water supply system is not only related to the daily life of residents, but also directly related to the development and stability of cities. At present, urban water supply systems in many areas have problems such as insufficient water supply capacity and aging water supply pipe networks, so it is necessary to carry out urban water supply project construction or renewal. In the construction of urban water supply projects, reservoir water intake control wells belong to deep shaft construction. Deep shaft construction often faces many challenges such as complex geological conditions, large-scale equipment use and construction safety. There may be accident risks such as collapse and blasting during the construction process, and at the same time, it will cause noise, dust, vibration and other impacts on the surrounding environment. Safety production and environmental protection need to be paid attention to. Therefore, optimizing the construction process of reservoir water intake control wells, improving construction efficiency and quality, and ensuring the safety of construction personnel are of great significance to improving the overall operation of urban water supply systems. Summary of the invention

[0003] The present invention aims to overcome the defects of the prior art, provide a method for constructing a reservoir water intake control well, and solve the problems of insufficient water supply capacity and aging of water supply pipe network in urban water supply systems.

[0004] In order to solve the above-mentioned technical problems, the present invention is achieved as follows: A reservoir water intake control well construction method, characterized in that it comprises the following steps: Step 1: Preliminary construction preparation and upper slope support construction; Step 2: Excavate and support the shaft to the bottom of the shaft, and seal the bottom with concrete; Step 3: Construction of low water level water intake pipe; Step 4: Let water flow through the low water level water intake pipe; Step 5: Construction of high water level water intake pipe; Step 6: Construction of high platform (steel platform); Step 7: Use the steel platform to continue constructing the control well to the top; Step 8: Finish the subsequent construction, dismantle the formwork and steel platform, and complete the control well construction.

[0005] The method for constructing a reservoir water intake control well is characterized in that step one specifically comprises the following steps: conventional reservoirs all have slopes, and the design and construction are carried out in combination with geological conditions, using gravity-type plain concrete retaining walls and frame lattice beams + anchor rod support; the slopes are crushed and excavated by an excavator, and the lattice beams are grooved manually; then, steel pipe piles are constructed at the foot of the slope for slope protection, and the steel pipe piles are drilled with geological core drilling to ensure that there are no risks of collapse, landslides, etc. in the surrounding area during the construction of the control well.

[0006] The construction method of a reservoir water intake control well is characterized in that step 2 specifically comprises: combining geological conditions, the control well shaft adopts multiple ring beams + mortar anchor rods + mesh spraying concrete support, and the excavation method can be combined with the hardness of the geological rock formation, using mechanical crushing, static blasting, and water grinding drilling; The method for constructing a reservoir water intake regulating well is characterized in that step three specifically comprises: a low-water-level water intake pipe is constructed using a rock pipe jacking machine, and the main steps are: pre-constructing a reaction wall and installing a double-layer water-stop rubber plate at the outlet of the pipe jacking hole; using a special rock pipe jacking machine for the pipe jacking head, and hoisting using a heavy-duty truck; hoisting a section of the water intake pipe to the base using a corresponding truck crane; and hoisting the pipe jacking head using a floating boat on the water.

[0007] The method for constructing a reservoir water intake regulating well is characterized in that step four specifically comprises: synchronously constructing the main structure of the regulating well upwards, utilizing the additional partition wall in the regulating well during construction, combining reinforced concrete slabs to seal half of the low-water-level water-passing space, opening the low-water-level water intake pipe blind plate, and making the water level in the regulating well flush with the reservoir. At this time, the strategic goal of supplying water to the downstream has been achieved, and at the same time, it can effectively avoid affecting the later high-water-level water intake pipe construction.

[0008] The method for constructing a reservoir water intake control well is characterized in that step six is ​​specifically as follows: when the upper control well concrete wall and platform beam are constructed, the control well has been kept in a water-flowing state. In order to ensure the subsequent wall and platform construction, a steel platform is planned to be set up to facilitate subsequent construction. The platform beam adopts HM500×300 steel section. This platform serves as a supporting platform for the subsequent construction of the inner and outer walls of the control well.

[0009] The method for constructing a reservoir water intake control well is characterized in that step seven specifically comprises: the upper structure is an ordinary reinforced concrete structure, and is constructed by conventional means of erecting a formwork support frame; all steel pipe support frame uprights are fixed on welded steel bars or adjustable screw rods on steel beams, and the full-chamber fastener-type steel pipe support frame also serves as an inner and outer wall construction work platform and is gradually erected upward; wall connecting parts are reserved in a circular manner every 3m on the inner and outer walls of the control well, and are synchronously connected with the full-chamber support frame; the circular structure support frame in the control well adopts Φ48×3.0mm fastener steel pipe, 15mm thick wooden formwork and 80×40mm square wood.

[0010] The beneficial effects of the present invention are: It can be seen from the above technical scheme that the present application provides a method for constructing a reservoir water intake regulating well, studies the construction process of the reservoir water intake regulating well, and proposes a set of effective construction sequence optimization schemes, which achieves the goals of shortening the construction period, reducing costs and ensuring project quality. The research results will be of great significance for improving the efficiency and quality of the construction process of the reservoir water intake regulating well, ensuring the safety of construction personnel, as well as environmental protection and safe production, and can provide useful reference for subsequent similar projects.

[0011] Compared with the traditional construction technology, this method optimizes the construction process and construction methods, takes the connection between the low-water-level water intake pipe and the reservoir as the key line, and promptly carries out water supply after the construction of the water diversion tunnel and the low-water-level water intake pipe is completed. The strategic goal of water supply is achieved early, ensuring timely water supply in the area. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of the slope support on the control well; Figure 2 This is a schematic diagram of the vertical shaft excavation for the control shaft; Figure 3 This is a schematic diagram of the construction of low-water intake pipes; Figure 4 This is a schematic diagram of the water supply to the control well; Figure 5 This is a schematic diagram of the construction of the high water level intake pipe; Figure 6 This is a schematic diagram of the construction of the control well steel platform; Figure 7 This is a schematic diagram of the superstructure construction; Figure 8 Complete the schematic for the control well. DETAILED DESCRIPTION

[0013] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments in the embodiments of the present application are within the scope of protection requested by the present application. like Figure 1-8 As shown: A method for constructing a reservoir water intake control well. Process 1: Preliminary construction preparation and upper slope support construction. Conventional reservoirs all have slopes, which can be designed and constructed in combination with geological conditions, such as using gravity-type plain concrete retaining walls and frame lattice beams + anchor support. The slope is excavated by excavators, and the lattice beams are grooved manually; then steel pipe piles are constructed at the foot of the slope for slope protection, and the steel pipe piles are drilled with geological cores. Ensure that there are no risks such as collapse and landslides in the surrounding area during the construction of the control well.

[0014] Process 2: The shaft is excavated and supported to the bottom of the shaft, and the bottom is sealed with concrete. In combination with the geological conditions, the control shaft adopts multiple ring beams + mortar anchors + mesh spraying concrete support. The excavation method can be combined with the hardness of the geological rock formation, using mechanical crushing, static blasting, water grinding drilling and other methods. The concrete project adopts conventional construction methods.

[0015] The mechanical crushing process is low cost and high efficiency, and is very suitable for low-hardness rock formations; the water-grinding drilling construction process has the advantage of having little impact on the surrounding environment; the static blasting process is highly efficient, but has a great impact on the surrounding area, and requires precise control of the drilling depth, explosive beam, etc.

[0016] Process 3: Construction of low-water intake pipe. The low-water intake pipe is constructed by rock jacking machine. The main steps are: pre-construction of reaction wall, installation of double-layer water-stop rubber plate at the outlet of the jacking pipe; use of special rock jacking machine for the jacking machine head, and heavy-duty truck hoisting; use of corresponding truck crane to hoist one section of the water intake pipe (steel pipe) to the base; use of floating boat to hoist the jacking machine head.

[0017] Process 4: Low-water-level water intake pipe water supply. Simultaneously construct the main structure of the control well upwards, and use the additional control well partition wall combined with reinforced concrete slabs to close half of the low-water-level water supply space. Open the low-water-level water intake pipe blind plate, and the water level in the control well is flush with the reservoir. At this time, the strategic goal of water supply to the downstream has been achieved. At the same time, it can effectively avoid affecting the later high-water-level water intake pipe construction.

[0018] Process 5: Construction of high water level water intake pipe. The construction method is basically the same as the construction process of low water level water intake pipe.

[0019] Process 6: Construction of high platform (steel platform). During the construction of the upper control well concrete wall and platform beams, the control well has been kept in a water-flowing state. In order to ensure the subsequent wall and platform construction, a steel platform is planned to be set up to facilitate subsequent construction. The platform beam adopts HM500×300 steel section. This platform serves as a support platform for the subsequent construction of the inner and outer walls of the control well.

[0020] Process 7: Use the steel platform to continue constructing the control shaft to the top. The upper structure is an ordinary reinforced concrete structure, which can be constructed by conventional formwork support frame erection. All steel pipe support frame uprights are fixed on the welded steel bars or adjustable screws on the steel beams. The full-chamber fastener-type steel pipe support frame also serves as the internal and external wall construction platform and is gradually erected upward. Wall connecting parts are reserved in a circular manner every 3m on the inner and external walls of the control shaft in advance, and are connected to the full-chamber support frame synchronously; the circular structure support frame in the control shaft uses Φ48×3.0mm fastener steel pipes, 15mm thick wooden formwork and 80×40mm square wood.

[0021] Process 8: Finish the subsequent construction, dismantle the formwork and steel platform, and complete the control well construction.

[0022] The present invention studies the construction process of reservoir water intake regulating wells and proposes a set of effective construction sequence optimization schemes, which achieves the goals of shortening the construction period, reducing costs and ensuring project quality. The research results will be of great significance in improving the efficiency and quality of the construction process of reservoir water intake regulating wells, ensuring the safety of construction personnel, as well as environmental protection and safe production, and can provide a useful reference for subsequent similar projects.

[0023] The above are only embodiments provided for the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for constructing a reservoir water intake control well, characterized in that It includes the following steps: Step 1: Preliminary construction preparation and upper slope support construction; Step 2: Excavate and support the shaft to the bottom of the shaft, and seal the bottom with concrete; Step 3: Construction of low water level water intake pipe; Step 4: Let water flow through the low water level water intake pipe; Step 5: Construction of high water level water intake pipe; Step 6: Construction of high platform (steel platform); Step 7: Use the steel platform to continue constructing the control well to the top; Step 8: Finish the subsequent construction, dismantle the formwork and steel platform, and complete the control well construction.

2. A reservoir water intake control well construction method according to claim 1, characterized in that Step one is as follows: Conventional reservoirs all have slopes, and the design and construction are carried out in combination with geological conditions, using gravity-type plain concrete retaining walls and frame lattice beams + anchor support; the slopes are crushed and excavated by excavators, and the lattice beams are grooved manually; then steel pipe piles are constructed at the foot of the slope for slope protection, and the steel pipe piles are drilled with geological core drilling to ensure that there are no risks of collapse, landslides, etc. in the surrounding area during the construction of the control well.

3. A reservoir water intake control well construction method according to claim 1, characterized in that The specific steps of step two are as follows: Based on the geological conditions, the control shaft adopts multiple ring beams + mortar anchors + mesh sprayed concrete support. The excavation method can be combined with the hardness of the geological rock formation, and mechanical crushing, static blasting, and water drilling can be used.

4. A reservoir water intake control well construction method according to claim 1, characterized in that Step three is as follows: low-water-level water intake pipes are constructed using a rock pipe jacking machine, and the main steps are: pre-construction of a reaction wall, installation of a double-layer water-stop rubber plate at the outlet of the pipe; a special rock pipe jacking machine is used for the pipe jacking head, and heavy-duty truck lifting is used for lifting; a section of the water intake pipe is lifted to the base using a corresponding truck crane; and the pipe jacking head is lifted using a floating boat.

5. A reservoir water intake control well construction method according to claim 1, characterized in that Step four is as follows: synchronously construct the main structure of the control well upwards, use the newly added control well partition wall, combined with reinforced concrete slabs to close half of the low-water-level water-passing space, open the low-water-level water intake pipe blind plate, and make the water level in the control well flush with the reservoir. At this time, the strategic goal of water supply to the downstream has been achieved, and it can effectively avoid affecting the later high-water-level water intake pipe construction.

6. A reservoir water intake control well construction method according to claim 1, characterized in that Step six is ​​as follows: During the construction of the upper control well concrete wall and platform beams, the control well has been kept in a water-flowing state. In order to ensure the subsequent wall and platform construction, a steel platform is planned to be set up to facilitate subsequent construction. The platform beam adopts HM500×300 steel section. This platform serves as a supporting platform for the subsequent construction of the inner and outer walls of the control well.

7. A reservoir water intake control well construction method according to claim 1, characterized in that Step seven is as follows: the upper structure is an ordinary reinforced concrete structure, and is constructed by conventional means of erecting formwork support frames; all steel pipe support frame uprights are fixed on welded steel bars or adjustable screws on steel beams, and the full-height fastener-type steel pipe support frames also serve as internal and external wall construction platforms and are gradually erected upwards; wall connections are reserved in a circular pattern at intervals of 3m on the internal and external walls of the control shaft, and are synchronously connected to the full-height support frames; the circular structure support frames in the control shaft are made of Φ48×3.0mm fastener steel pipes, 15mm thick wooden formwork and 80×40mm square timber.

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