Pipe gallery trolley construction method

Abstract

The present application relates to the field of pipe gallery construction method, especially to a pipe gallery trolley construction method for realizing the construction efficiency of the underground comprehensive pipe gallery hydraulic formwork trolley in the occasion of the sinking section or the larger construction longitudinal slope, comprising the following steps: a, pipe gallery concrete bottom plate and U-shaped guide wall construction; b, side wall formwork and steel bar installation; c, trolley positioning; d, trolley adjustment; e, steel bar and pre-embedded part installation; f, concrete pouring; g, demolding; h, trolley moving mode comprises the following two modes: when the top concrete strength reaches the design strength, the trolley and the top form move integrally; after the top concrete strength reaches 80%, temporary vertical supports are arranged in the pipe gallery, the trolley is separated from the top form, the trolley walks forward first, and after reaching the next section position, the above steps a to g are repeated to carry out the next section construction.

Description

Technical Field

[0001] This invention relates to the field of pipe gallery construction methods, and in particular to a pipe gallery trolley construction method. Background Technology

[0002] The construction of integrated utility tunnels is an inevitable trend in my country's urbanization process and an important guarantee for the sustainable development of cities. To adapt to the rising labor costs, increasing energy conservation and environmental protection requirements, and the industrialization of the construction industry, the technology of using trolleys for the construction of urban integrated utility tunnels has emerged. Currently, hydraulic formwork trolleys for urban underground integrated utility tunnels are highly efficient in straight sections, but they face limitations in areas such as the overall tunnel subsidence, material feeding ports, and monitoring rooms. They are unsuitable for complex environments with many subsidence sections and large longitudinal slopes, and also suffer from low mechanization, limited applicability, and low overall utilization efficiency.

[0003] The suspended platform is an existing structure whose core components are a suspended steel structure and a base steel structure. However, the suspended steel structure and the base steel structure are not directly connected; instead, they are supported and restrained by load-bearing cables and limiting cables on both sides, thus achieving stability between the suspended steel structure and the base steel structure. However, existing suspended platforms cannot achieve height adjustment, therefore they cannot be directly applied to the height-adjustable scenario described in this solution. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a construction method for underground utility tunnel hydraulic formwork trolleys that improves construction efficiency in situations with large longitudinal slopes or sinking sections by using a height-adjustable suspension plate.

[0005] The technical solution adopted by this invention to solve its technical problem is: a pipe gallery trolley construction method, comprising the following steps:

[0006] a. Construction of the concrete base slab and U-shaped guide wall of the pipe gallery: First, the foundation pit is excavated, and then the construction of the foundation layer, the binding of the reinforcing bars, the installation of the formwork for the U-shaped guide wall, and the pouring and curing of concrete are carried out in sequence according to the design.

[0007] b. Installation of side wall formwork and reinforcement: Before the formwork trolley enters, the side wall reinforcement binding and side wall formwork installation of this construction section shall be completed. The formwork used for side wall construction shall be an integral formwork.

[0008] c. Trolley positioning: After the template trolley is transported to the construction site, at least two pipe gallery trolleys with height adjustment structures are set up adjacently and assembled and placed in the designated position. The trolley's planar position is fixed by the locking device of the pipe gallery trolley with height adjustment structure.

[0009] d. Trolley Adjustment: According to design and construction requirements, the height adjustment structures of adjacent utility tunnel trolleys are connected to each other through connecting locks and assembled into a whole structure. After installing the top template longitudinal and transverse support rods on the top of the height adjustment structure, the top template is then installed. Subsequently, the motors and sub-operation controls of each section are connected to the motor and operation control system. Then, the length of the limit cable and load-bearing cable of the height adjustment structure is adjusted through the motor and operation control system, thereby adjusting the height of the top of the height adjustment structure and ensuring that the top template elevation is consistent with the design elevation. Finally, the top template and the side wall template are fixed together through a fixing connection device.

[0010] e. Reinforcing steel and embedded parts installation: After the formwork trolley is positioned and adjusted, the top slab reinforcing steel is tied and the embedded parts are installed.

[0011] f. Concrete pouring: After the reinforcement, formwork, waterstop and embedded parts are installed and accepted, the concrete pouring operation shall be carried out.

[0012] g. Demolding: After the concrete is poured, the top slab should be watered and covered with a membrane for curing. The side formwork should be removed after the concrete is poured.

[0013] h. The trolley movement methods include the following two methods:

[0014] Once the top concrete reaches its design strength, the trolley and top formwork move as a whole.

[0015] Once the top concrete reaches 80% strength, temporary vertical supports are installed inside the pipe gallery. The trolley is then detached from the top formwork, and the trolley moves forward first. After reaching the next segment position, steps a to g above are repeated to construct the next segment.

[0016] Furthermore, in step g, 4 hours after the concrete pouring is completed, the top slab should be watered and covered with a membrane for curing.

[0017] Furthermore, in step g, the side formwork can be removed 24 hours after the concrete pouring is completed.

[0018] Furthermore, in step g, after removing the integral formwork of the side wall, once the top formwork meets the removal requirements, the height of the pipe gallery trolley construction height adjustment structure is lowered using a motor and operation control system. After the trolley descends, the top formwork and fixing connection device are removed.

[0019] Furthermore, in step g, the height adjustment structure for the pipe gallery trolley construction includes a T-shaped suspended steel structure and a U-shaped base steel structure. The bottom of the suspended steel structure and the top of the base steel structure are connected by load-bearing cables. The two sides of the suspended steel structure are connected to the two sides of the base steel structure by limiting cables, including at least three sets of pulleys. The top of the load-bearing cables is wound around the pulleys of the first set, and the bottom of the limiting cables on both sides of the suspended steel structure is wound around the pulleys of the second and third sets, respectively. All pulleys are connected to a motor. When the suspended steel structure needs to move upward, the pulleys of the first set rotate and shorten the length of the load-bearing cables, while the pulleys of the second and third sets rotate and extend the length of the limiting cables on both sides of the suspended steel structure. When the suspended steel structure needs to move downward, the pulleys of the first set rotate and extend the length of the load-bearing cables, while the pulleys of the second and third sets rotate and shorten the length of the limiting cables on both sides of the suspended steel structure.

[0020] Furthermore, the bottom of the base steel structure is equipped with casters, and the two ends of the casters' axles are located at the bottom of the base steel structure.

[0021] Furthermore, it includes a locking device for locking the casters, the locking device being fixedly mounted on the base steel structure.

[0022] The beneficial effects of this invention are: compared with traditional cast-in-place construction, this method effectively reduces the cycle time, accelerates the progress while ensuring safety, ensures a smooth process, prevents the formwork from being subjected to impact loads, significantly reduces the manpower required for formwork erection and dismantling during construction, reduces labor intensity, shortens the construction cycle, and saves labor and machinery costs, thereby saving costs. This invention is particularly suitable for various scenarios such as variable cross-sections and longitudinal slope changes, improving the overall utilization efficiency of the formwork trolley. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an embodiment of the present invention.

[0024] Figure 2 yes Figure 1 The embodiment is a structural diagram for trolley construction.

[0025] The components are marked as follows: 1. Suspended steel structure, 11. Locking buckle, 2. Base steel structure, 3. Limiting cable, 4. Pulley block, 41. Load-bearing cable, 5. Caster wheel, 6. Locking device, 7. Motor and operation control system, 8. Top template longitudinal and transverse support rods, 8. Slope 81. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] like Figure 1The diagram shows a height-adjustable structure for pipe gallery trolley construction, primarily consisting of a T-shaped suspended steel structure 1 and a U-shaped base steel structure 2. It is called "suspended" because the suspended steel structure 1 and the base steel structure 2 are connected by flexible steel wire cables, ensuring the stability of their connection. This suspended structure is an existing structure; however, once manufactured, its height cannot be adjusted, thus failing to meet the height variations required during trolley construction.

[0028] First, the bottom of the suspended steel structure 1 is connected to the top of the base steel structure 2 by a load-bearing cable 41. All the weight of the suspended steel structure 1 is transferred to the top of the base steel structure 2 through the load-bearing cable 41, which also bears the entire weight of the suspended steel structure 1. The two sides of the suspended steel structure 1 are connected to the two sides of the base steel structure 2 by limiting cables 3. These limiting cables 3 do not bear the weight of the suspended steel structure 1; they only limit excessive rotation of the suspended steel structure 1 around the load-bearing cable 41. That is, while the limiting cables 3 cannot completely prevent the rotation and swaying of the suspended steel structure 1, they can effectively prevent excessive deflection. This structure has a certain ability to absorb vibration and impact. Thus, the load-bearing cable 41 and the limiting cables 3 work together to connect the T-shaped suspended steel structure 1 and the U-shaped base steel structure 2, achieving a certain degree of structural stability.

[0029] As the core design for adjusting the height of the suspended steel structure 1, three sets of pulley blocks 4 are designed. The top of the load-bearing cable 41 is wound around the first set of pulley blocks 4, and the bottoms of the limiting cables 3 on both sides of the suspended steel structure 1 are wound around the second and third sets of pulley blocks 4, respectively. All pulley blocks 4 are connected to a motor. During rotation, the pulley blocks 4 can wind the cables around them, thereby shortening or lengthening the length of the cables, thus achieving adjustment. The first set of pulley blocks 4 has the opposite function to the second and third sets of pulley blocks 4. That is, when the first set of pulley blocks 4 rotates and shortens the length of the load-bearing cable 41, the second and third sets of pulley blocks 4 rotate and lengthen the length of the limiting cables 3 on both sides of the suspended steel structure 1. At this time, the suspended steel structure 1 moves upward, thereby raising the height of the trolley. When the first set of pulley blocks 4 rotates and extends the length of the load-bearing cable 41, the second and third sets of pulley blocks 4 rotate and shorten the length of the limiting cables 3 on both sides of the suspended steel structure 1. At this time, the suspended steel structure 1 moves downward, thereby reducing the height of the trolley. If multiple height adjustment structures for the construction of the pipe gallery trolley are arranged linearly along the direction of trolley movement, the height adjustment can be adjusted to create a height difference in the linear arrangement direction between the height adjustment structures at the bottom of the longitudinal and transverse support rods 8 of the top template, thus allowing the longitudinal and transverse support rods 8 of the top template to have the required slope 81 to meet the construction needs of the trolley.

[0030] In practical design, it is preferable to add an operation control system, which is connected to the motor, thereby allowing the motor to accurately control the rotation of each pulley group 4. Figure 2 As shown, the motor and operation control system 7 can be integrated and configured.

[0031] In a preferred embodiment where one end of the limiting cable 3 is located on both sides of the suspended steel structure 1, a locking buckle 11 can be provided on each side of the suspended steel structure 1. One end of the limiting cable 3 is connected to the suspended steel structure 1 via the locking buckle 11, and the locking buckle 11 and the suspended steel structure 1 are detachably connected. Preferably, the locking buckle 11 is provided on both sides of the suspended steel structure 1 by fastening screws. In actual use, in order to enable the movement of the bottom of the base steel structure 2, a caster wheel 5 can be provided at the bottom of the base steel structure 2, with both ends of the axle of the caster wheel 5 located at the bottom of the base steel structure 2. Of course, in order to lock the caster wheel 5, a locking device 6 can be added. The locking device 6 is fixedly provided on the base steel structure 2, and generally, the locking device 6 is set close to the caster wheel 5.

[0032] In actual construction, the following steps can be followed: 1. Construction of the concrete base slab and U-shaped guide wall of the pipe gallery: First, excavate the foundation pit, and then proceed with the construction of the foundation layer, the binding of the reinforcing bars, the installation of the formwork for the U-shaped guide wall, and the pouring and curing of concrete according to the design. The formwork used for the guide wall construction is an integral formwork, consisting of an inner form, an outer form, connecting bolts between the inner and outer form, and intermediate support rods. 2. Installation of side wall formwork and reinforcing bars: Before the formwork trolley enters, complete the binding of the side wall reinforcing bars and the installation of the side wall formwork for this construction section. The formwork used for the side wall construction is an integral formwork, consisting of an inner form, an outer form, connecting bolts between the inner and outer form, and outer support rods. 3. Trolley positioning: After assembling the suspended steel structure 1, the base steel structure 2, the load-bearing cable 41, the limiting cable 3, the casters 5, and the locking device 6, place them in the designated position. After reaching the designated position, fix the trolley's planar position using the locking device 6 of the casters 5. Install the top formwork longitudinal and transverse support rods 8 on the top of the suspended steel structure 1, and finally install the top formwork. 4. Trolley Adjustment: Based on design and construction requirements, the lengths of the load-bearing cables 41 and limiting cables 3 are adjusted via the motor and operation control system 7 to ensure that the elevation of the top formwork longitudinal and transverse support rods 8 above the suspended steel structure 1 matches the design elevation. Finally, the top formwork longitudinal and transverse support rods 8 are fixed to the side wall formwork using a fixing connection device. 5. Reinforcing Steel and Embedded Part Installation: After the formwork trolley is positioned and adjusted, the top slab reinforcing steel is tied and the embedded parts are installed. 6. Concrete Pouring: After the reinforcing steel, formwork, waterstops, and other embedded parts are installed and inspected, concrete pouring is carried out. 7. Demolding: Four hours after concrete pouring, the top slab is watered and covered with a membrane for curing. Twenty-four hours after concrete pouring, the side formwork can be removed. The integral side wall formwork is removed, while the fixing connection device remains on the top formwork. Once the top formwork meets the removal requirements, the cable length is lowered via the operation control system, the trolley descends, and the top formwork and fixing connection device are removed. 8. Trolley Movement: There are two methods for trolley movement: ① After the top concrete reaches its design strength, the trolley and top formwork are moved as a whole; ② After the top concrete reaches 80% strength, temporary vertical supports are installed inside the pipe gallery, the trolley is detached from the top formwork, and the trolley moves forward first. After reaching the next segment, steps 1-7 above are repeated until all construction is completed. The two trolley movement methods can be flexibly selected according to actual construction needs, thus making construction more flexible and able to cope with complex construction scenarios. It also fully utilizes the height-adjustable advantage of the height-adjustable structure used for pipe gallery trolley construction, organically combining the height-adjustable structure with the trolley construction to form a complete construction process.

[0033] Compared with traditional cast-in-place construction, this construction method reduces the cycle time, speeds up the progress while ensuring safety, and ensures a smooth process. The formwork is not subjected to impact loads, which greatly reduces the manpower required for formwork erection and dismantling during construction, reduces labor intensity, shortens the construction cycle, and saves labor and machinery costs, thereby saving costs.

Claims

1. A method for constructing utility tunnels using a trolley, characterized in that, Includes the following steps: a. Construction of the concrete base slab and U-shaped guide wall of the pipe gallery: First, the foundation pit is excavated, and then the construction of the foundation layer, the binding of the reinforcing bars, the installation of the formwork for the U-shaped guide wall, and the pouring and curing of concrete are carried out in sequence according to the design. b. Installation of side wall formwork and reinforcement: Before the formwork trolley enters, the side wall reinforcement binding and side wall formwork installation of this construction section shall be completed. The formwork used for side wall construction shall be an integral formwork. c. Trolley positioning: After the template trolley is transported to the construction site, at least two pipe gallery trolleys with height adjustment structures are set up adjacently and assembled and placed in the designated position. The trolley plane position is fixed by the locking device (6) of the pipe gallery trolley with height adjustment structure. d. Trolley adjustment: According to the design and construction requirements, the adjacent trolley construction height adjustment structures are connected to each other through connecting locks and assembled into a whole structure. After installing the top template longitudinal and transverse support rods (8) on the top of the trolley construction height adjustment structure, the top template is installed. Then, the motors and sub-operation controls of each section are connected to the motor and operation control system (7). Then, the length of the limit cable (3) and the load-bearing cable (41) of the trolley construction height adjustment structure is adjusted through the motor and operation control system (7), thereby adjusting the height of the top of the trolley construction height adjustment structure and realizing that the top template elevation is consistent with the design elevation. Finally, the top template and the side wall template are fixed through the fixed connection device. e. Reinforcing steel and embedded parts installation: After the formwork trolley is positioned and adjusted, the top slab reinforcing steel is tied and the embedded parts are installed. f. Concrete pouring: After the reinforcement, formwork, waterstop and embedded parts are installed and accepted, the concrete pouring operation shall be carried out. g. Demolding: After the concrete is poured, the top slab should be watered and covered with a membrane for curing. The side formwork should be removed after the concrete is poured. The height adjustment structure for the construction of the pipe gallery trolley includes a T-shaped suspended steel structure (1) and a U-shaped base steel structure (2). The bottom of the suspended steel structure (1) and the top of the base steel structure (2) are connected by a load-bearing cable (41). The two sides of the suspended steel structure (1) are connected to the two sides of the base steel structure (2) by limiting cables (3). It includes at least three sets of pulleys (4). The top of the load-bearing cable (41) is wound around the pulleys (4) of the first set. The bottom of the limiting cables (3) on both sides of the suspended steel structure (1) is... The pulleys (4) of the second group and the pulleys (4) of the third group are respectively wound around the motor. When the suspended steel structure (1) needs to move upward, the pulleys (4) of the first group rotate and shorten the length of the load-bearing cable (41), and the pulleys (4) of the second group and the pulleys (4) of the third group rotate and lengthen the length of the limiting cables (3) on both sides of the suspended steel structure (1). When the suspended steel structure (1) needs to move downward, the pulleys (4) of the first group rotate and lengthen the length of the load-bearing cable (41), and the pulleys (4) of the second group and the pulleys (4) of the third group rotate and shorten the length of the limiting cables (3) on both sides of the suspended steel structure (1). h. The trolley movement methods include the following two methods: Once the top concrete reaches its design strength, the trolley and top formwork move as a whole. Once the top concrete reaches 80% strength, temporary vertical supports are installed inside the pipe gallery. The trolley is then detached from the top formwork, and the trolley moves forward first. After reaching the next segment position, steps a to g above are repeated to construct the next segment.

2. The pipe gallery trolley construction method as described in claim 1, characterized in that: In step g, 4 hours after the concrete pouring is completed, the top slab should be watered and covered with a membrane for curing.

3. The pipe gallery trolley construction method as described in claim 1, characterized in that: In step g, the side formwork can be removed 24 hours after the concrete pouring is completed.

4. The pipe gallery trolley construction method as described in claim 1, characterized in that: In step g, after removing the integral formwork of the side wall, once the top formwork meets the removal requirements, the height of the height adjustment structure for the construction of the pipe gallery trolley is lowered by the motor and operation control system (7). After the trolley is lowered, the top formwork and the fixed connection device are removed.

5. The pipe gallery trolley construction method as described in claim 1, characterized in that: The bottom of the base steel structure (2) is provided with casters (5), and the two ends of the rotating shaft of the casters (5) are located at the bottom of the base steel structure (2).

6. The pipe gallery trolley construction method as described in claim 5, characterized in that: It includes a locking device (6) for locking the caster wheel (5), which is fixedly mounted on the base steel structure (2).

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