Double-line construction method for lock shaft
By employing a dual-line construction method for the gate well, utilizing H-beams and suspended platforms for high-altitude operations, simultaneous work was achieved both inside and outside the gate well. This solved the problems of long construction periods and low assembly accuracy, thereby improving construction efficiency and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GEZHOUBA GRP NO 2 ENG
- Filing Date
- 2023-11-10
- Publication Date
- 2026-08-04
AI Technical Summary
Existing gate well construction methods suffer from problems such as long construction periods, low assembly accuracy, and insufficient inspection methods for downhole gate leaves, leading to tight schedules for subsequent construction.
The gate well was constructed using a dual-line construction method. H-beams were used to erect the gate well opening and a high-altitude work basket was installed. Construction was carried out simultaneously inside and outside the gate well. First, the gate was assembled and the hoist building outside the well was constructed. Inside the well, the gate slot was roughened and the gate rail was installed. The second phase of concrete was poured in sections.
It shortened the construction period, improved the gate assembly accuracy, reduced the transportation difficulties of large-tonnage metal structural components, and ensured construction safety and quality.
Smart Images
Figure CN117431912B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of deep gate well construction, and in particular to construction methods for gate well projects with high requirements for progress and quality. Background Technology
[0002] In water conveyance structures such as hydropower stations, gate wells are often designed. These are gate wells with gate rails and secondary concrete installations, such as inlet / outlet gate wells and flood discharge / emptying tunnel gate wells. The main construction method for gate wells is a step-by-step linear construction method. During construction, the gate needs to be lowered to the bottom of the well for assembly. Due to limitations in the construction of the gate slots at the bottom of the well, and the relatively limited means of dimensional inspection for the assembled gate leaves, the assembly accuracy is relatively low. Furthermore, gate wells occupy a significant portion of the linear construction period, making subsequent construction schedules tighter. Summary of the Invention
[0003] The purpose of this invention is to provide a dual-line construction method for gate wells that has a short construction period, relatively low investment, and high gate assembly accuracy. The objective of this invention is achieved as follows: The double-line construction method for the gate well involves the following steps: After the first-stage concrete 1 construction of the gate well is completed, H-beams 2 are erected on the two gate slots 6 of the first-stage concrete at the gate well opening. After erection, the gate 3 is hoisted using the H-beams as supports. After the gate is hoisted, the suspended platform 4 is installed for high-altitude operations. After the suspended platform is installed and passes inspection, the gate well opening seal 5 is installed. The seal 5 has a reserved hole for the suspended platform, wire rope, gate rail, and chute. After the sealing work is completed, the hoist tower 10 is constructed outside the well, and the suspended platform is used as a construction platform inside the well to roughen the gate slots 6. After roughening is completed, the suspended platform is used as a construction platform to install the gate rail 7. The gate rail is hoisted vertically from the reserved opening at the well opening by a crane to the installation position. The gate rail is fixedly connected to the first-stage concrete through anchor bars. After the gate rail is installed, formwork is erected, and the second-stage concrete 9 is poured using chutes and chutes 8. Gate 3 and gate rail 7 are each composed of several sections. H-beams are used to assemble the gate on the wellhead, and a double-layer suspended basket is used as a construction platform to install the gate rail. The construction inside the well uses a suspended platform as a working platform, while the construction of the gate hoist building frame outside the well is carried out simultaneously with the construction inside the well. Includes the following steps: (1) H-beam frame erection at wellhead H-beams 2 are erected on the two gate slots 6 of the first-stage concrete at the gate wellhead. These H-beams serve as support beams, and the gate assembly is completed above them. The location of the H-beams should be carefully selected, taking into full account the concrete's load-bearing capacity to avoid crushing. After the H-beams are installed, the elevation difference of their upper surfaces is adjusted to ensure they are level. (2) Gate hoisting Gate 3 consists of three rectangular gate leaves. These three rectangular gate leaves are sequentially hoisted onto the H-beams, and assembled vertically upwards. A flatbed truck transports the bottom gate leaf section to the construction site. A truck crane first lifts the bottom gate leaf section above the H-beams at the gate well platform opening, and then slowly lowers it onto the H-beams. After confirming that the position is correct, the second gate leaf section is hoisted onto the bottom gate leaf section. Once it reaches above the bottom gate leaf section, the geometric position of the second gate leaf section is adjusted using the pre-reserved center line of the gate structure as a reference. All data are re-measured to ensure compliance with specifications. Spot welding and welding of supports are then performed for reinforcement. After acceptance, welding work is carried out. The third gate leaf section is assembled using the same method. (3) Installation of suspended platform for high-altitude operations The ZLP800 double-layer suspended platform is selected, and the layer height is selected according to the length of each door track section. (4) Wellhead sealing The wellhead is constructed using double-layered plywood with scaffolding steel pipes in between, and the outer surface is covered with burlap sacks to prevent falling objects from posing a safety hazard to workers inside the well during the construction of the hoist building. (5) Construction of the gate hoist building outside the well First, assemble the gate using an H-beam steel frame above the gate opening. Once assembly is complete and the suspended platform is erected, and safety protection measures are implemented at the opening, construction of the hoist tower frame can begin. It is important to note that during construction, the gate must be covered with waterproof tarpaulin, and double-layered plywood should be used for protection above the suspended platform's suspension supports to prevent falling objects from affecting its operation. Furthermore, the hoist tower scaffolding should be erected to avoid the locations of the gate and the suspended platform. (6) Roughen the concrete gate slot in the gate well. Using a suspended platform for high-altitude operations, the surface of the first-phase concrete door groove 6 was manually roughened to remove surface laitance. To avoid damaging the concrete edges, a 2-3cm wide area was left at the corners for roughening with a hammer or wire brush. After the door rail 7 was installed and tested successfully, the rough concrete surface was washed with a high-pressure water gun to ensure that the concrete surface was free of grease, rust, and loose debris. (7) Installation of embedded parts for the door rail inside the well Each gate slot position has a gate rail 7 consisting of 14 sections. The gate rail on the water-facing side of the gate is the reverse rail, with a right-angled trapezoidal cross-section. The gate rail on the back-water side of the gate is the main rail, with a rectangular cross-section. The gate rails are installed using a suspended platform, installed sequentially from bottom to top. On the right-angled surface of the shorter side of the right-angled trapezoid of the gate slot 6 relative to the reverse rail 7, there is a row of vertical reinforcing bars welded to a pre-reserved steel plate. On the right-angled surface of the longer side of the trapezoid of the gate slot 6 relative to the reverse rail 7, there are two rows of vertical reinforcing bars welded to a pre-reserved steel plate. On the right-angled surface of the shorter rectangular side of the main rail of the gate slot 6 relative to the gate rail 7, there is a row of vertical... The reinforcing bars are welded to the reserved steel plates. Two rows of vertical reinforcing bars are welded to the reserved steel plates on the right-angled surface of the rectangular main rail of the gate slot 6 relative to the gate rail 7. Each gate rail section is fixedly connected to the pre-embedded steel plate in the first-phase concrete by welding reinforcing bars. Measurement control points are laid out on the first-phase concrete gate slot. After each gate rail section is hoisted into place, the verticality, flatness, horizontality, elevation, and mileage data of the embedded parts are initially adjusted using turnbuckles and hand-operated hoists. When the installation accuracy of each control point meets the requirements of the drawings and specifications and is re-measured and qualified, the gate rail is welded to the vertical reinforcing bars on the pre-embedded steel plate in the first-phase concrete. (8) Second-stage concrete construction inside the well During the second phase of concrete construction inside the well, the method of installing the gate rail 7 in 14 sections and the formwork in 35 sections was adopted. Each section of gate rail 7 is 5m long and each section of formwork is 2m high. The second phase of concrete was poured in 35 sections. After each 2m high formwork was installed, 2m high concrete was poured. The concrete was mixed by the mixing plant and transported to the construction site by the mixer truck. It was then transported into the silo through the chute and the chute 8.
[0004] The advantages of this invention are as follows: H-beams were used to assemble the gate frame at the wellhead. At the same time, a suspended platform for high-altitude operations was installed at the wellhead. After the wellhead was covered, construction inside and outside the gate well was carried out simultaneously. This alleviated the problem of construction inside the gate well occupying the straight-line construction period, made construction quick, facilitated gate assembly and inspection, and improved the quality of gate assembly. Attached Figure Description Figure 1 Synchronous construction structure diagram of gate well Figure 2 H-beam support diagram Figure 3 Gate structure diagram Figure 4 Gate hoisting diagram Figure 5 Wellhead sealing diagram Figure 6 Diagram of the reverse rail structure Figure 7 Main rail structure diagram Figure 8 Chisel surface construction detail drawing Figure 9Door track installation detail drawing Figure 10 Detailed drawings of the second phase of concrete construction Figure 11 Schematic diagram of chute and sluice Detailed Implementation The double-line construction method for the gate well involves the following steps: After the first-stage concrete 1 construction of the gate well is completed, H-beams 2 are erected on the two gate slots 6 of the first-stage concrete at the gate well opening. After erection, the gate 3 is hoisted using the H-beams as supports. After the gate is hoisted, the suspended platform 4 is installed for high-altitude operations. After the suspended platform is installed and passes inspection, the gate well opening seal 5 is set up. The seal 5 has a reserved hole for the suspended platform, wire rope, gate rail, and chute. After the sealing work is completed, the hoist tower 10 is constructed outside the well, and the suspended platform is used as a construction platform inside the well to start the roughening work of the gate slots 6. After the roughening work is completed, the gate rail 7 is installed using the suspended platform as a construction platform. The gate rail is hoisted vertically from the reserved gap at the well opening by a crane to the installation position. The gate rail is fixedly connected to the first-stage concrete through anchor bars. After the gate rail is installed, formwork is erected, and the second-stage concrete 9 is poured using the chute 8. Using H-beams to assemble the gate at the wellhead ensures that the gate is assembled outside the well, significantly improving the assembly accuracy and testing methods compared to assembling inside the well. It also avoids the problem of transporting large-tonnage metal structural components after the gate is assembled at other locations. The height of the double-layer suspended platform matches the length of each section of the gantry rail, saving time for personnel to go up and down and for equipment to move compared to traditional construction scaffolding, and making gantry rail installation faster. First, the gate is assembled, and construction is carried out simultaneously inside and outside the well. The construction outside the well can skip the time for roughening the gate slot, installing the gate rail, and the second phase of concrete, and directly proceed to the construction of the hoist building. The construction method for a double-line gate well includes the following steps: (1) H-beam frame erection at wellhead H-beams 2 are erected on the two gate slots 6 of the first-stage concrete at the gate wellhead. These H-beams serve as support beams, and the gate assembly is completed above them. The location of the H-beams should be carefully selected, taking into full account the concrete's load-bearing capacity to avoid crushing. After the H-beams are installed, the elevation difference of their upper surfaces is adjusted to ensure they are level. (2) Gate hoisting Gate 3 consists of three rectangular gate leaves. These three rectangular gate leaves are sequentially hoisted onto the H-beams, and assembled vertically upwards. A flatbed truck transports the bottom gate leaf section to the construction site. A truck crane first lifts the bottom gate leaf section above the H-beams at the gate well platform opening, and then slowly lowers it onto the H-beams. After confirming that the position is correct, the second gate leaf section is hoisted onto the bottom gate leaf section. Once it reaches above the bottom gate leaf section, the geometric position of the second gate leaf section is adjusted using the pre-reserved center line of the gate structure as a reference. All data are re-measured to ensure compliance with specifications. Spot welding and welding of supports are then performed for reinforcement. After acceptance, welding work is carried out. The third gate leaf section is assembled using the same method. (3) Installation of suspended platform for high-altitude operations The ZLP800 double-layer suspended platform is selected, and the layer height is selected according to the length of each door track section. (4) Wellhead sealing The wellhead is constructed using double-layered plywood with scaffolding steel pipes in between, and the outer surface is covered with burlap sacks to prevent falling objects from posing a safety hazard to workers inside the well during the construction of the hoist building. (5) Construction of the gate hoist building outside the well First, assemble the gate using an H-beam steel frame above the gate opening. Once assembly is complete and the suspended platform is erected, and safety protection measures are implemented at the opening, construction of the hoist tower frame can begin. It is important to note that during construction, the gate must be covered with waterproof tarpaulin, and double-layered plywood should be used for protection above the suspended platform's suspension supports to prevent falling objects from affecting its operation. Furthermore, the hoist tower scaffolding should be erected to avoid the locations of the gate and the suspended platform. (6) Roughen the concrete gate slot in the gate well. Using a suspended platform for high-altitude operations, the surface of the first-phase concrete door groove 6 was manually roughened to remove surface laitance. To avoid damaging the concrete edges, a 2-3cm wide area was left at the corners for roughening with a hammer or wire brush. After the door rail 7 was installed and tested successfully, the rough concrete surface was washed with a high-pressure water gun to ensure that the concrete surface was free of grease, rust, and loose debris. (7) Installation of embedded parts for the door rail inside the well Each gate slot position has a gate rail 7 consisting of 14 sections. The gate rail on the water-facing side of the gate is the reverse rail, with a right-angled trapezoidal cross-section. The gate rail on the back-water side of the gate is the main rail, with a rectangular cross-section. The gate rails are installed using a suspended platform, installed sequentially from bottom to top. On the right-angled surface of the shorter side of the right-angled trapezoid of the gate slot 6 relative to the reverse rail 7, there is a row of vertical reinforcing bars welded to a pre-reserved steel plate. On the right-angled surface of the longer side of the trapezoid of the gate slot 6 relative to the reverse rail 7, there are two rows of vertical reinforcing bars welded to a pre-reserved steel plate. On the right-angled surface of the shorter rectangular side of the main rail of the gate slot 6 relative to the gate rail 7, there is a row of vertical... The reinforcing bars are welded to the reserved steel plates. Two rows of vertical reinforcing bars are welded to the reserved steel plates on the right-angled surface of the rectangular main rail of the gate slot 6 relative to the gate rail 7. Each gate rail section is fixedly connected to the pre-embedded steel plate in the first-phase concrete by welding reinforcing bars. Measurement control points are laid out on the first-phase concrete gate slot. After each gate rail section is hoisted into place, the verticality, flatness, horizontality, elevation, and mileage data of the embedded parts are initially adjusted using turnbuckles and hand-operated hoists. When the installation accuracy of each control point meets the requirements of the drawings and specifications and is re-measured and qualified, the gate rail is welded to the vertical reinforcing bars on the pre-embedded steel plate in the first-phase concrete. (8) Second-stage concrete construction inside the well During the second phase of concrete construction inside the well, the method of installing the gate rail 7 in 14 sections and the formwork in 35 sections was adopted. Each section of gate rail 7 is 5m long and each section of formwork is 2m high. The second phase of concrete was poured in 35 sections. After each 2m high formwork was installed, 2m high concrete was poured. The concrete was mixed by the mixing plant and transported to the construction site by the mixer truck. It was then transported into the silo through the chute and the chute 8.
Claims
1. A method for double-line construction of a shaft, characterized in that, After the first phase of concrete (1) construction of the gate well is completed, H-beams (2) are erected on the two gate slots (6) of the first phase concrete at the gate well opening. After the erection, the gate (3) is hoisted with the H-beams as support. After the gate is hoisted, the high-altitude operation basket (4) is installed. After the basket is installed and accepted, the gate well opening is sealed (5). The sealing basket has a basket, wire rope, gate rail, and reserved holes for the chute. After the sealing work is completed, the gate hoist building (10) is constructed outside the well. Inside the well, the basket is used as a construction platform to roughen the gate slots. After the roughening work is completed, the basket is used as a construction platform to install the gate rail (7). The gate rail is hoisted vertically from the reserved gap at the well opening by a crane to the installation position. The gate rail is fixedly connected to the first phase concrete through anchor bars. After the gate rail is installed, the formwork is erected and the second phase concrete (9) is poured using the chute (8).
2. The dual lane shaft construction method of claim 1, wherein, The gate (3) and the gate rail (7) are composed of several sections. The gate is assembled on the wellhead using H-beams, and the gate rail is installed using a double-layer suspended basket as a construction platform.
3. The dual lane construction method of a shaft gate according to claim 1, wherein The construction inside the well uses a suspended platform as a working platform, while the construction of the gate hoist building frame outside the well is carried out simultaneously with the construction inside the well.
4. The dual lane construction method of a manhole according to claim 1, wherein, Includes the following steps: (1) H-beam frame erection at wellhead H-beams (2) are erected on the two gate slots (6) of the first-stage concrete at the gate wellhead. The H-beams are used as support beams to complete the gate assembly above them. The location of the H-beams should be carefully selected to fully consider the bearing capacity of the concrete to avoid crushing. After the H-beams are installed, the elevation difference of the upper surface is adjusted to ensure that the levelness is qualified. (2) Gate hoisting The gate (3) consists of three rectangular gate leaves. The three rectangular gate leaves are hoisted onto the H-beams in sequence. The gate is assembled using an upright assembly method. A flatbed truck transports the bottom gate leaf to the construction site. A truck crane is used to hoist the bottom gate leaf to the top of the H-beams at the gate well platform opening. The bottom gate leaf is then slowly lowered onto the H-beams. After confirming that the position is correct, the second gate leaf is hoisted onto the bottom gate leaf. Once it reaches the bottom gate leaf, the geometric position of the second gate leaf is adjusted based on the gate structure centerline reserved by the manufacturer. All data are re-measured to ensure they meet the specifications. Spot welding is performed for reinforcement, and welding supports are also performed for reinforcement. After acceptance, welding operations are carried out. The third gate leaf is then assembled using the same method. (3) Installation of suspended platform for high-altitude operations The ZLP800 double-layer suspended platform is selected, and the layer height is selected according to the length of each door track section. (4) Wellhead sealing The wellhead is constructed using double-layered plywood with scaffolding steel pipes in between, and the outer surface is covered with burlap sacks to prevent falling objects from posing a safety hazard to workers inside the well during the construction of the hoist building. (5) Construction of the gate hoist building outside the well First, assemble the gate using an H-beam steel frame above the gate opening. Once assembly is complete and the suspended platform is erected, and safety protection measures are implemented at the opening, construction of the hoist tower frame can begin. It is important to note that during construction, the gate must be covered with waterproof tarpaulin, and double-layered plywood should be used for protection above the suspended platform's suspension supports to prevent falling objects from affecting its operation. Furthermore, the hoist tower scaffolding should be erected to avoid the locations of the gate and the suspended platform. (6) Roughen the concrete gate slot in the gate well. Using a suspended platform for high-altitude operations as the construction platform, the surface of the concrete door groove in the first phase was roughened manually to remove surface laitance. To avoid damaging the concrete edges, a 2-3cm wide area was left at the corners for roughening with a hand hammer or wire brush. After the door rail 7 was installed and debugged successfully, the rough concrete surface was washed with a high-pressure water gun to ensure that the concrete surface was free of grease, rust, and loose debris. (7) Installation of embedded parts for the door rail inside the well Each gate slot position has a gate rail consisting of 14 sections. The gate rail on the water-facing side of the gate is the reverse rail, with a right-angled trapezoidal cross-section. The gate rail on the back side of the gate is the main rail, with a rectangular cross-section. The gate rails are installed using a high-altitude work platform, installed sequentially from bottom to top. On the right-angled surface of the short side of the right-angled trapezoid of the gate slot (6) relative to the gate rail (7), there is a row of vertical steel bars welded to the reserved steel plate. On the right-angled surface of the long side of the right-angled trapezoid of the gate slot (6) relative to the gate rail (7), there are two rows of vertical steel bars welded to the reserved steel plate. On the right-angled surface of the rectangular short side of the main rail of the gate slot (6) relative to the gate rail (7), there are two rows of vertical steel bars welded to the reserved steel plate. A row of vertical reinforcing bars is welded to the reserved steel plate. On the right-angled surface of the rectangular long side of the main rail of the gate slot (6) relative to the gate rail (7), there are two rows of vertical reinforcing bars welded to the reserved steel plate. Each section of the gate rail is fixedly connected to the pre-embedded steel plate of the first-phase concrete by welding reinforcing bars. The installation measurement control points are laid out on the gate slot of the first-phase concrete. After each section of the gate rail is hoisted into place, the verticality, flatness, horizontality, elevation, and mileage data of the embedded parts are initially adjusted using turnbuckles and hand-operated hoists. When the installation accuracy of each control point meets the requirements of the drawings and specifications and is qualified after re-measurement, the gate rail is welded to the vertical reinforcing bars on the pre-embedded steel plate of the first-phase concrete. (8) Second-stage concrete construction inside the well During the second phase of concrete construction inside the well, the method of installing the gate rail in 14 sections and the formwork in 35 sections is adopted. Each section of gate rail (7) is 5m long and each section of formwork is 2m high. The second phase of concrete is poured in 35 sections. After each 2m high formwork is installed, 2m high concrete is poured. The concrete is mixed by the mixing plant and transported to the construction site by the mixer truck. It is then transported into the silo through the chute (8).