Y-shaped pier column construction device and method based on combination of in-situ jacking and cast-in-place

Abstract

The invention provides a Y-shaped pier column construction device and method based on combination of in-situ jacking and cast-in-place. The Y-shaped pier column construction device comprises a functional vehicle and a transport vehicle. At least two first lifting stand columns are arranged on the functional vehicle, the ends of the first lifting stand columns are rotationally connected with one end of a jacking cross beam, and a moving module is arranged on the jacking cross beam. At least two sets of second lifting stand columns are arranged on the transport vehicle, a rotary table is arranged between the two sets of second lifting stand columns, and the two sets of jacking cross beams are connected with the first lifting stand columns and the second lifting stand columns correspondingly to form a portal frame hoisting structure. The front and rear portal frame hoisting structures are used for jacking the carrying pole beam, and the pier column is arranged on the carrying pole beam. By adopting the Y-shaped pier column construction method based on combination of in-situ jacking and cast-in-situ, integrated construction of a prefabricated pier cap and a cast-in-situ pier column is achieved, the working efficiency is improved, the construction safety is guaranteed, the construction cost is reduced, and the problem of limitation of existing engineering equipment is solved.

Description

Technical Field

[0001] This invention relates to the field of bridge construction, and in particular to a Y-shaped pier construction device and method based on a combination of in-situ jacking and cast-in-place casting. Background Technology

[0002] With economic development, the capacity of highways built in previous years (especially in economically developed areas) has become severely insufficient, leading to frequent congestion and necessitating reconstruction and expansion. To make intensive use of existing space, highway construction is trending towards a three-dimensional approach: a common practice is to erect Y-shaped piers at the road's midline and lay box girders on top of the piers. This design efficiently integrates spatial resources and avoids the need for additional land use, thus gaining widespread application.

[0003] The cap beams of Y-shaped piers are large and complex in structure. Using conventional cast-in-place construction methods would result in low construction efficiency, difficulty in quality control, and prolonged disruption to existing traffic. Therefore, Y-shaped piers are best constructed using a prefabrication method in the factory and assembly on-site. However, using prefabricated construction throughout would significantly increase the cost of the reconstruction and expansion project, making a balance between cost and efficiency a major challenge. Furthermore, since Y-shaped piers are often constructed on existing highway surfaces, which have complex conditions such as height restrictions, existing mobile cranes and conventional gantry cranes are unsuitable: mobile cranes have insufficient lifting capacity and poor safety in confined spaces; traditional gantry cranes cannot pass through height-restricted areas, and high-level lifting poses a high safety risk. The limitations of existing construction equipment further restrict the construction of Y-shaped piers.

[0004] Therefore, balancing construction efficiency, cost, and safety while overcoming the limitations of existing equipment has become a major challenge in current renovation and expansion projects. This invention proposes a Y-shaped pier construction method combining in-situ jacking and cast-in-place construction. The pier cap utilizes a prefabricated construction method, addressing quality control difficulties and improving construction efficiency. The lower straight pier section employs in-situ cast-in-place construction, resolving cost issues. Furthermore, a split-type jacking device is proposed, addressing the problems of poor maneuverability, high safety risks, and low lifting capacity of existing equipment. This effectively balances construction efficiency, cost, and safety while also resolving equipment adaptability issues. Summary of the Invention

[0005] The main objective of this invention is to provide a Y-shaped pier construction device and method based on a combination of in-situ jacking and cast-in-place construction, which solves the problems of low construction efficiency, difficulty in cost control, difficulty in construction safety control, and poor adaptability of existing engineering equipment in the construction of Y-shaped piers in the above-mentioned highway reconstruction and expansion projects.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a Y-shaped pier construction device based on the combination of in-situ jacking and cast-in-place, including a functional vehicle and a transport vehicle; The functional vehicle is equipped with at least two first lifting columns, the ends of which are rotatably connected to one end of the lifting beam, and the lifting beam is equipped with a movable module. The transport vehicle is equipped with at least two sets of second lifting columns, and a turntable is provided between the two sets of second lifting columns. The two sets of lifting beams are respectively connected to the first lifting column and the second lifting column to form a gantry hoisting structure. The front and rear gantry hoisting structures are used to lift the spreader beam, and the piers are set on the spreader beam.

[0007] In the preferred embodiment, the first lifting column is slidably connected to the first frame of the functional vehicle, and the bottom of the first lifting column slides laterally on the first frame of the functional vehicle via a motor drive.

[0008] In the preferred embodiment, the top of the first lifting column is connected to the lifting beam via a rotary drive. The rotary drive adopts a worm gear transmission structure. The rotary drive housing is fixedly connected to the top of the first lifting column. The worm gear inside the rotary drive is connected to the rotating shaft of the lifting beam, and the worm is connected to the conveying end of the hydraulic motor.

[0009] In the preferred embodiment, the mobile module moves on the first lifting column via a motor drive.

[0010] In the preferred embodiment, the second lifting column is slidably connected to the second frame of the transport vehicle, and the second lifting column slides on the second frame via a motor drive.

[0011] In the preferred embodiment, the top of the second lifting column is provided with a docking device, which is connected to the end of the lifting beam; The docking device is a docking flange, which is bolted to the end of the lifting beam.

[0012] In the preferred embodiment, the first lifting column and the second lifting column have the same structure. The first lifting column includes a telescopic structure composed of multiple columns that are connected in stages, and hydraulic lifting devices are provided on both sides of the telescopic structure.

[0013] In the preferred embodiment, the turntable is driven to rotate by a turntable hydraulic motor. The turntable is fixedly connected to the rotating disk, and the rotating disk is rotatably connected to the second frame. The outer ring of the rotating disk is equipped with gears, and the gears at the output end of the turntable hydraulic motor mesh with the gears on the outer ring of the rotating disk.

[0014] In the preferred embodiment, both the functional vehicle and the transport vehicle are equipped with multiple wheel sets at the bottom. The wheel sets are hydraulically lifting wheel sets, and a steering mechanism is provided between the wheel sets and the vehicle chassis.

[0015] The method includes: S1. The functional vehicle is positioned at the construction site, and the wheel set moves to level the functional vehicle; the transport vehicle returns to the prefabrication plant to transport the pier cap to the construction site, aligns with the functional vehicle, and the wheel set moves to level the transport vehicle. S2, the rotary drive action rotates the end of the lifting beam to the side of the transport vehicle, the second lifting column moves along the second frame to the designated position, the docking device is activated, and the end of the lifting beam is connected. S3. Rotate the turntable to rotate the pier cap 90° and install the spreader beam under the pier cap; S4. The first and second lifting columns move synchronously, moving the lifting beam below the spreader beam; the moving module moves below the spreader beam; the first and second lifting columns lift synchronously until the moving module contacts the spreader beam and lifts the pier cap. S5. The first and second lifting columns are lifted synchronously to raise the pier cap to the designated height; the moving modules on both sides move synchronously to move the pier cap to the center position; the vertical height of the pier cap is adjusted by the synchronous lifting of the first and second lifting columns, and the front-to-back direction is adjusted by the movement of the first and second lifting columns or by the movement of the functional vehicle or transport vehicle; the left-to-right direction is adjusted by the moving modules, and finally the pier cap is adjusted to the designated position. S6. Tie the reinforcing bars of the straight pier column under the pier cap in advance and install the formwork. When the pier cap is adjusted to the designated position, connect the reinforcing bars of the pier cap and the straight pier column to the connection nodes, and then pour the concrete. After the concrete has reached the required strength, remove the formwork to complete the construction of a complete Y-shaped pier column.

[0016] This invention provides a Y-shaped pier construction device and method based on a combination of in-situ jacking and cast-in-place casting. This invention aims to solve the problems of low construction efficiency, difficulty in cost control, difficulty in construction safety control, and poor adaptability of existing engineering equipment in the construction of Y-shaped piers during highway reconstruction and expansion. By adopting a Y-shaped pier construction method based on in-situ jacking and cast-in-place construction, it achieves integrated construction of precast pier caps and cast-in-place piers, improving work efficiency, ensuring construction safety, reducing construction costs, and overcoming the limitations of existing engineering equipment. Specific beneficial effects are as follows: (1) The pier cap adopts the method of prefabrication in the factory and installation on site, which can effectively control the forming quality and solve the problems of long construction cycle and difficult safety control of the pier cap. It solves the quality problem, some construction efficiency problem and construction safety problem; (2) The straight pier column section adopts the in-situ casting method, which has little impact on the construction period and has little impact on the existing traffic. However, it reduces the construction cost much compared with the prefabricated assembly construction, thus reducing the construction cost. (3) A split-type jacking equipment was proposed, which solved the problems of poor passability, high safety risk and low lifting capacity of existing equipment. It effectively balanced construction efficiency, cost and safety, and solved the problem of equipment adaptability.

[0017] Furthermore, this technical solution employs a construction method that involves first lifting the upper precast pier cap and then recasting the lower straight pier column. This novel method combines the advantages mentioned above, achieving unexpected results: on the one hand, it avoids the interference of precasting the straight pier column with the equipment lifting and transportation process; on the other hand, it enables the lifting and installation of the pier, reducing the height of the equipment body and ensuring construction safety. Simultaneously, it avoids the connection problems associated with precasting followed by installation, thus guaranteeing construction quality. In addition, if linear piers also require prefabricated construction, the equipment proposed in this plan can also be used for the construction of linear piers, and the equipment has wide adaptability. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is an axonometric structural diagram of the functional vehicle in the split-type lifting equipment of this invention; Figure 2 This is an axonometric structural diagram of the transport vehicle in the split-type lifting equipment of this invention; Figure 3 This is a schematic diagram of the Y-shaped pier constructed according to the present invention; Figure 4 This is a site view of the first construction step of the Y-shaped pier column of the present invention; Figure 5 This is a schematic diagram of the second step in the construction of the Y-shaped pier column of the present invention; Figure 6 This is a schematic diagram of the third step in the construction of the Y-shaped pier column of the present invention; Figure 7 This is a jacking preparation diagram for step four of the Y-shaped pier construction process of the present invention; Figure 8 This is the pier cap adjustment diagram for step five of the Y-shaped pier construction process of this invention; Figure 9 This is a construction completion diagram of step six of the Y-shaped pier construction process of the present invention.

[0019] In the diagram: Functional vehicle 1; First frame 101; Wheel set 102; First lifting column 103; Rotary drive 104; Worm gear 1042; Worm 1043; Lifting beam 105; Moving module 106; Transport vehicle 2; Second frame 201; Second lifting column 203; Docking device 204; Turntable 205; Rotary disk 2051; Turntable hydraulic motor 2052 3. Pier cap; 4. Spread beam; 5. Straight pier column. Detailed Implementation

[0020] Example 1 like Figure 1-9As shown, a Y-shaped pier construction device based on a combination of in-situ jacking and cast-in-place concrete includes a functional vehicle 1 and a transport vehicle 2. The functional vehicle 1 is provided with at least two first lifting columns 103, the ends of the first lifting columns 103 are rotatably connected to one end of the lifting beam 105, and the lifting beam 105 is provided with a movable module 106. The transport vehicle 2 is equipped with at least two sets of second lifting columns 203, and a turntable 205 is provided between the two sets of second lifting columns 203. The two sets of lifting beams 105 are respectively connected to the first lifting column 103 and the second lifting column 203 to form a gantry hoisting structure. The front and rear gantry hoisting structures are used to lift the spreader beam 4, and the piers are set on the spreader beam 4.

[0021] The construction device is based on a functional vehicle 1 and a transport vehicle 2. The functional vehicle 1 is equipped with at least two first lifting columns 103, the ends of which are rotatably connected to one end of a lifting beam 105. The lifting beam 105 is equipped with a movable module 106. The transport vehicle 2 is equipped with at least two sets of second lifting columns 203. A turntable 205 is installed between the two sets of second lifting columns 203. The two sets of lifting beams 105 are connected to the first lifting columns 103 and the second lifting columns 203 respectively, forming a gantry hoisting structure. The gantry hoisting structure set at the front and rear is used to lift the spreader beam 4, while the pier cap 3 of the Y-shaped pier is placed on the spreader beam 4. In subsequent construction, it will form a complete Y-shaped pier together with the cast-in-place straight pier 5.

[0022] The device is operated according to the following steps: First, drive the functional vehicle 1 to the construction position and position it. Adjust the equipment level using the wheels of the functional vehicle 1. At the same time, transport vehicle 2 goes to the prefabrication plant to transport the prefabricated pier cap 3. After placing the pier cap 3 on the turntable 205, drive transport vehicle 2 to the construction site and align it with functional vehicle 1. Level the equipment using the wheels of transport vehicle 2. Next, operate the rotating connection structure between the end of the first lifting column 103 and the lifting beam 105 to rotate the lifting beam 105 to the corresponding position with the second lifting column 203 on transport vehicle 2. This connects the two sets of lifting beams 105 to the first lifting column 103 and the second lifting column 203 respectively to form a gantry hoisting structure. Then, control the turntable 205 to rotate, driving the pier cap 3 to rotate to a suitable angle. Install the spreader beam 4 on the pier cap 3. Subsequently, the first lifting column 103 and the second lifting column 203 are moved synchronously, causing the corresponding lifting beam 105 and the moving module 106 of the gantry hoisting structure to move below the spreader beam 4. Then, the first lifting column 103 and the second lifting column 203 are simultaneously activated to lift the spreader beam 4 until the moving module 106 contacts and lifts the spreader beam 4, thereby driving the pier cap 3 to rise. After the pier cap 3 is lifted to the initial height, the vertical position of the pier cap 3 is controlled by adjusting the lifting height of the first lifting column 103 and the second lifting column 203. The left and right positions of the pier cap 3 are adjusted by moving the moving module 106, and the front and rear positions of the pier cap 3 are adjusted by moving the functional vehicle 1 or the transport vehicle 2. Finally, the pier cap 3 is precisely adjusted to the designated installation position. Finally, the reinforcing bars of the straight pier column 5 are tied below the pier cap 3, the formwork is installed, concrete is poured and cured until the strength meets the standard, and the formwork is removed to complete the construction of the Y-shaped pier column.

[0023] The system adopts a split structure consisting of a functional vehicle 1 and a transport vehicle 2, and is equipped with a rotatable lifting beam 105 and a movable lifting column. It can flexibly adapt to narrow construction environments with height restrictions, such as existing highways. It solves the problems of insufficient lifting capacity of traditional mobile cranes and the inability of traditional gantry cranes to pass through height-restricted areas, thereby improving the adaptability of the equipment and construction safety.

[0024] The pier cap 3 is prefabricated and installed with precise lifting by a device. Compared with the traditional cast-in-place pier cap, it can effectively control the forming quality of the pier cap, shorten the on-site construction cycle, and reduce the interference with existing traffic. The lower straight pier column 5 is cast in place, which significantly reduces the construction cost compared with the fully prefabricated construction, and achieves a balance between quality, efficiency and cost.

[0025] Through the coordinated action of the gantry hoisting structure and the mobile module 106, the pier cap 3 can be precisely adjusted in multiple directions to ensure the accurate installation position of the pier cap. At the same time, the process of first lifting the pier cap and then re-casting the straight pier column avoids the interference of pre-casting the pier column on the equipment lifting and transportation, and also solves the connection treatment problems that may occur when casting first and then installing, further ensuring the construction quality and efficiency.

[0026] In the preferred embodiment, the first lifting column 103 is slidably connected to the first frame 101 of the functional vehicle 1, and the bottom of the first lifting column 103 slides laterally on the first frame 101 of the functional vehicle 1 via a motor drive.

[0027] The top of the first lifting column 103 is connected to the lifting beam 105 via a rotary drive 104. The rotary drive 104 adopts a worm gear transmission structure. The outer shell of the rotary drive 104 is fixedly connected to the top of the first lifting column 103. The worm gear 1042 inside the rotary drive 104 is connected to the rotating shaft of the lifting beam 105, and the worm 1043 is connected to the conveying end of the hydraulic motor.

[0028] The connection structure and driving method of the first lifting column 103 on the functional vehicle 1, as well as the connection details with the lifting beam 105, are clearly defined: the first lifting column 103 is slidably connected to the first frame 101 of the functional vehicle 1, and its bottom is driven by a motor, allowing it to slide laterally on the first frame 101 to adjust the lateral position of the first lifting column 103; at the same time, the top of the first lifting column 103 is connected to the lifting beam 105 through a rotary drive 104. The rotary drive 104 adopts a worm gear transmission structure, specifically, the outer shell of the rotary drive 104 is fixed to the top of the first lifting column 103, the internal worm gear 1042 is connected to the rotating shaft of the lifting beam 105, and the worm 1043 is connected to the conveying end of the hydraulic motor. The hydraulic motor drives the worm 1043 to rotate, thereby driving the worm gear 1042 and the lifting beam 105 to rotate, providing a structural basis for the subsequent lifting and position adjustment of the pier cap 3.

[0029] The first lifting column 103 is driven by a motor to slide laterally on the first frame 101. The lateral spacing can be flexibly adjusted according to the size of the pier cap 3 and the construction position requirements, adapting to the construction of Y-shaped piers of different specifications. At the same time, the rotary drive 104 allows the lifting beam 105 to rotate at multiple angles, facilitating quick docking with the transport vehicle 2 and improving the equipment's adaptability to construction scenarios. In terms of transmission stability and safety, the rotary drive 104 adopts a worm gear transmission structure, which features a large transmission ratio, smooth operation, and good self-locking. This effectively prevents the lifting beam 105 from rotating unexpectedly when bearing the weight of the pier cap 3, ensuring the stability of the lifting process and reducing construction safety risks. From the perspective of construction efficiency, the lateral sliding adjustment driven by the motor and the rotary action driven by the hydraulic motor are convenient to operate and respond quickly. This reduces the adjustment time of the first lifting column 103 and the lifting beam 105, speeds up the docking and lifting progress of the pier cap 3, and thus improves the overall construction efficiency, better meeting the needs of scenarios with strict requirements for construction cycles, such as highway reconstruction and expansion.

[0030] In the preferred embodiment, the mobile module 106 moves on the first lifting column 103 via a motor drive.

[0031] After the functional vehicle 1 and the transport vehicle 2 work together to complete the connection of the lifting beam 105 and the installation of the spreader beam 4, the moving module 106 needs to be driven by the motor to adjust it to the lower position corresponding to the spreader beam 4 on the first lifting column 103. Then, the first lifting column 103 and the second lifting column 203 of the transport vehicle 2 are lifted synchronously until the moving module 106 contacts and lifts the spreader beam 4 and the pier cap 3. After the height of the pier cap 3 is raised to the initial range, if it is necessary to adjust the left and right position of the pier cap 3 to align with the installation benchmark, the moving module 106 can be driven by the motor to slide on the first lifting column 103 again, so as to drive the spreader beam 4 and the pier cap 3 to achieve lateral fine adjustment. Finally, the pier cap 3 is accurately positioned to the designated installation position, laying the foundation for the subsequent cast-in-place construction of the straight pier column 5.

[0032] The motor drive provides stable and controllable power to the mobile module 106, ensuring that its movement speed and displacement on the first lifting column 103 can be precisely adjusted. This avoids deviations that may occur with manual adjustment or other drive methods, ensuring the accuracy of the pier cap 3's position adjustment and thus improving the overall construction quality of the Y-shaped pier. Secondly, the mobile module 106 can flexibly change its position on the first lifting column 103 via motor drive, adapting to the support requirements of different sized spreader beams 4 and pier caps 3, enhancing the adaptability of the functional vehicle 1 to the construction of Y-shaped piers of different specifications. Thirdly, the automated operation of the motor drive reduces manual intervention, not only reducing the labor intensity of construction personnel but also quickly responding to position adjustment needs, shortening the time required for pier cap 3 positioning, and improving overall construction efficiency. This is especially suitable for scenarios with strict requirements for construction cycle and traffic interference control, such as highway reconstruction and expansion.

[0033] In the preferred embodiment, the second lifting column 203 is slidably connected to the second frame 201 of the transport vehicle 2, and the second lifting column 203 slides on the second frame 201 driven by a motor.

[0034] The top of the second lifting column 203 is provided with a docking device 204, which is connected to the end of the lifting beam 105. The docking device 204 is a docking flange, which is connected to the end of the lifting beam 105 by bolts.

[0035] The first lifting column 103 and the second lifting column 203 have the same structure. The first lifting column 103 includes a telescopic structure composed of multiple columns that are connected in stages. Hydraulic lifting devices are provided on both sides of the telescopic structure.

[0036] The second lifting column 203 is slidably connected to the second frame 201 of the transport vehicle 2, and its sliding on the second frame 201 is achieved by motor drive, so that the position of the second lifting column 203 can be flexibly adjusted; the top of the second lifting column 203 is provided with a docking device 204, which is a docking flange. When in use, it is connected to the end of the lifting beam 105 by bolts to achieve a stable assembly of the second lifting column 203 and the lifting beam 105.

[0037] Meanwhile, the first lifting column 103 and the second lifting column 203 have the same structure. Both are composed of multiple columns that are connected in stages to form a telescopic structure. The telescopic structure is equipped with hydraulic lifting devices on both sides, which realize the lifting action of the column through hydraulic drive, and provide power support for the subsequent lifting of the pier cap 3.

[0038] The second lifting column 203 is driven by a motor to slide on the second frame 201. Combined with the same type of sliding design of the first lifting column 103, the column spacing can be flexibly adjusted to meet the hoisting requirements of different sized pier caps 3. In addition, the docking device 204 adopts a bolt-connected docking flange, which not only makes installation and disassembly convenient, but also ensures the stability of the connection between the lifting beam 105 and the column, avoids loosening during hoisting, and improves construction safety.

[0039] The first lifting column 103 and the second lifting column 203 adopt a multi-section telescopic structure that is connected in stages. With the help of hydraulic lifting devices on both sides, compared with the traditional column structure, the lifting stroke is longer and the load-bearing capacity is stronger. Moreover, the hydraulic drive mode runs smoothly and can accurately control the lifting height of the pier cap 3, reduce position deviation, and ensure the installation accuracy of the pier cap 3.

[0040] The first lifting column 103 and the second lifting column 203 with the same structure can reduce the production and maintenance costs of the equipment. The coordinated operation of motor-driven sliding and hydraulic lifting reduces the amount of manual adjustment and speeds up the construction progress of gantry assembly and pier cap 3 lifting. At the same time, it is suitable for the narrow and height-restricted construction environment of existing highways, avoiding the problem of poor adaptability of traditional equipment, and further improving construction efficiency and scene adaptability.

[0041] In the preferred embodiment, the turntable 205 is driven to rotate by the turntable hydraulic motor 2052. The turntable 205 is fixedly connected to the rotating disk 2051, and the rotating disk 2051 is rotatably connected to the second frame 201. The outer ring of the rotating disk 2051 is provided with gears, and the gear at the output end of the turntable hydraulic motor 2052 meshes with the gear on the outer ring of the rotating disk 2051.

[0042] The turntable 205 is powered by the turntable hydraulic motor 2052 to rotate. The turntable 205 is fixedly connected to the rotating disk 2051, which is rotatably connected to the second frame 201 of the transport vehicle 2. At the same time, the outer ring of the rotating disk 2051 is equipped with gears. The gears at the output end of the turntable hydraulic motor 2052 mesh with the gears on the outer ring of the rotating disk 2051 to form a gear transmission structure, thereby driving the turntable 205 to rotate synchronously with the rotating disk 2051, providing support for the angle adjustment of the precast pier cap 3.

[0043] The angle adjustment of the turntable 205 can be achieved simply by controlling the turntable hydraulic motor 2052. The operation is convenient and responsive, and no manual adjustment is required. This greatly reduces the workload and time of adjusting the angle of the pier cap 3, speeds up the construction progress, and is suitable for scenarios with high requirements for construction efficiency, such as highway reconstruction and expansion, further improving the smoothness of the overall construction process.

[0044] In the preferred embodiment, both the functional vehicle 1 and the transport vehicle 2 are equipped with multiple wheel sets 102 at their bottoms. The wheel sets 102 are hydraulically lifting wheel sets, and a steering mechanism is provided between the wheel sets 102 and the vehicle chassis.

[0045] The operation of the wheelset 102 and related structures needs to be integrated with the entire construction process: In the initial stage of construction, when the functional vehicle 1 needs to travel to the designated construction position, the steering mechanism between the chassis and the wheelset 102 is controlled to adjust the steering of the wheelset 102, enabling the functional vehicle 1 to travel in all directions, facilitating precise movement within the narrow construction area of ​​the existing highway. After the functional vehicle 1 is initially in place, the hydraulic lifting function of the wheelset 102 is activated. The lifting height of different wheelsets 102 is adjusted by hydraulic drive, and combined with the level detection equipment, the functional vehicle 1 is adjusted to a level state to ensure the stability of subsequent jacking operations. At the same time, when the transport vehicle 2 travels to the prefabrication plant to transport the pier cap 3, the steering mechanism of the wheelset 102 is also adjusted to achieve flexible travel and avoid site restrictions during transportation. After the pier cap 3 is placed on the turntable 205, the transport vehicle 2 travels to the construction site and aligns with the functional vehicle 1. The hydraulic lifting adjustment of the wheelset 102 is then used to ensure that the transport vehicle 2 and the functional vehicle 1 are level, laying the foundation for the subsequent jacking of the crossbeam 105 and the transfer of the pier cap 3. During construction, if the position of the functional vehicle 1 or the transport vehicle 2 needs to be finely adjusted, the direction of the wheel set 102 can be adjusted again through the steering mechanism, and the hydraulic lifting can be used to ensure that the equipment is level until the pier cap 3 is lifted and positioned and the straight pier column 5 is cast in place.

[0046] The hydraulic lifting wheel set allows the functional vehicle 1 and the transport vehicle 2 to achieve precise leveling by independently adjusting the height of each wheel set, adapting to the uneven ground that may exist on the construction site, and avoiding the impact of equipment tilt on the lifting accuracy of the pier cap 3 or the occurrence of safety risks.

[0047] The combination of the steering mechanism and the wheelset 102 enables the two vehicles to travel in all directions. Compared with traditional fixed-direction wheelsets, it is more suitable for the narrow and complex site environment in the reconstruction and expansion of existing highways, reduces the space restrictions when moving equipment, and facilitates quick positioning. Example 2 Further explanation in conjunction with Example 1, such as Figure 1-9 As shown in the structure, S1 and functional vehicle 1 are positioned at the construction location, and wheel set 102 moves to level functional vehicle 1; transport vehicle 2 returns to the prefabrication plant to transport pier cap 3 to the construction site, aligns with functional vehicle 1, and wheel set 102 moves to level transport vehicle 2, as shown in Figure 4. S2, the rotary drive 104 is activated, rotating the end of the lifting beam 105 to one side of the transport vehicle 2, the second lifting column 203 moves along the second frame 201 to the designated position, and the docking device 204 is activated to connect the end of the lifting beam 105, as shown in Figure 5. S3. Rotate the turntable 205 to rotate the pier cap 3 by 90° and install the spreader beam 4 under the pier cap 3, as shown in Figure 6. S4. The first lifting column 103 and the second lifting column 203 move synchronously, moving the lifting beam 105 below the spreader beam 4; the moving module 106 moves below the spreader beam 4; the first lifting column 103 and the second lifting column 203 lift synchronously until the moving module 106 contacts the spreader beam 4 and lifts the pier cap 3, as shown in Figure 7. S5. The first lifting column 103 and the second lifting column 203 are simultaneously lifted to raise the pier cap 3 to the designated height; the moving modules 106 on both sides move simultaneously to move the pier cap 3 to the center position; the vertical height of the pier cap 3 is adjusted by the simultaneous lifting of the first lifting column 103 and the second lifting column 203, and the front-to-back direction is adjusted by the movement of the first lifting column 103 and the second lifting column 203 or by the movement of the functional vehicle 1 and the transport vehicle 2; the left-to-right direction is adjusted by the moving module 106, and finally the pier cap 3 is adjusted to the designated position, as shown in Figure 8. S6. Tie the reinforcing bars of the straight pier column 5 below the pier cap 3 in advance and install the formwork. When the pier cap 3 is adjusted to the designated position, connect the reinforcing bars of the pier cap 3 and the straight pier column 5, and then pour the concrete. After the concrete has reached its full strength, remove the formwork to complete the construction of a complete Y-shaped pier column, as shown in Figure 9.

[0048] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A Y-shaped pier construction device based on a combination of in-situ jacking and cast-in-place concrete, characterized in that: Includes functional vehicles (1) and transport vehicles (2); The functional vehicle (1) is provided with at least two first lifting columns (103), the ends of the first lifting columns (103) are rotatably connected to one end of the lifting beam (105), and the lifting beam (105) is provided with a moving module (106). The transport vehicle (2) is equipped with at least two sets of second lifting columns (203), and a turntable (205) is provided between the two sets of second lifting columns (203). The two sets of lifting beams (105) are respectively connected to the first lifting column (103) and the second lifting column (203) to form a gantry hoisting structure. The front and rear gantry hoisting structures are used to lift the spreader beam (4), and the piers are set on the spreader beam (4).

2. The Y-shaped pier construction device based on in-situ jacking and cast-in-place construction as described in claim 1, characterized in that: The first lifting column (103) is slidably connected to the first frame (101) of the functional vehicle (1), and the bottom of the first lifting column (103) slides laterally on the first frame (101) of the functional vehicle (1) by a motor drive.

3. The Y-shaped pier construction device based on in-situ jacking and cast-in-place construction as described in claim 1, characterized in that: The top of the first lifting column (103) is connected to the lifting beam (105) via a rotary drive (104). The rotary drive (104) adopts a worm gear transmission structure. The outer shell of the rotary drive (104) is fixedly connected to the top of the first lifting column (103). The worm gear (1042) inside the rotary drive (104) is connected to the rotating shaft of the lifting beam (105), and the worm (1043) is connected to the conveying end of the hydraulic motor.

4. The Y-shaped pier construction device based on in-situ jacking and cast-in-place construction as described in claim 1, characterized in that: The mobile module (106) moves on the first lifting column (103) driven by a motor.

5. The Y-shaped pier construction device based on in-situ jacking and cast-in-place construction as described in claim 1, characterized in that: The second lifting column (203) is slidably connected to the second frame (201) of the transport vehicle (2), and the second lifting column (203) slides on the second frame (201) driven by a motor.

6. The Y-shaped pier construction device based on in-situ jacking and cast-in-place construction as described in claim 5, characterized in that: The second lifting column (203) is equipped with a docking device (204) at the top, and the docking device (204) is connected to the end of the lifting beam (105); The docking device (204) is a docking flange, which is connected to the end of the lifting beam (105) by bolts.

7. The Y-shaped pier construction device based on in-situ jacking and cast-in-place construction as described in claim 5, characterized in that: The first lifting column (103) and the second lifting column (203) have the same structure. The first lifting column (103) includes a telescopic structure composed of multiple columns that are connected in stages. The telescopic structure is equipped with hydraulic lifting devices on both sides.

8. The Y-shaped pier construction device based on in-situ jacking and cast-in-place construction as described in claim 1, characterized in that: The turntable (205) is driven to rotate by the turntable hydraulic motor (2052). The turntable (205) is fixedly connected to the rotating disk (2051). The rotating disk (2051) is rotatably connected to the second frame (201). The outer ring of the rotating disk (2051) is provided with gears. The gear at the output end of the turntable hydraulic motor (2052) meshes with the gear on the outer ring of the rotating disk (2051).

9. The Y-shaped pier construction device based on in-situ jacking and cast-in-place construction according to claim 1, characterized in that: Both the functional vehicle (1) and the transport vehicle (2) are equipped with multiple wheel sets (102) at the bottom. The wheel sets (102) are hydraulic lifting wheel sets, and a steering mechanism is provided between the wheel sets (102) and the vehicle chassis.

10. A construction method for a Y-shaped pier construction device based on a combination of in-situ jacking and cast-in-place concrete, as described in any one of claims 1-9, characterized in that: The method includes: S1. The functional vehicle (1) is positioned at the construction site, and the wheel set (102) moves to level the functional vehicle (1); the transport vehicle (2) returns to the prefabrication plant to transport the pier cap (3) to the construction site, aligns with the functional vehicle (1), and the wheel set (102) moves to level the transport vehicle (2); S2, the rotary drive (104) is activated, rotating the end of the lifting beam (105) to the side of the transport vehicle (2), the second lifting column (203) moves along the second frame (201) to the designated position, and the docking device (204) is activated to connect the end of the lifting beam (105); S3. Rotate the turntable (205) to rotate the pier cap (3) by 90° and install the spreader beam (4) under the pier cap (3). S4. The first lifting column (103) and the second lifting column (203) move synchronously to move the lifting beam (105) below the spreader beam (4); the moving module (106) moves below the spreader beam (4); the first lifting column (103) and the second lifting column (203) lift synchronously until the moving module (106) contacts the spreader beam (4) and lifts the pier cap (3); S5. The first lifting column (103) and the second lifting column (203) are lifted synchronously to raise the pier cap (3) to the specified height; the moving modules (106) on both sides move synchronously to move the pier cap (3) to the center seam position; the vertical height of the pier cap (3) is adjusted by the synchronous lifting of the first lifting column (103) and the second lifting column (203), and the front and back directions are adjusted by the movement of the first lifting column (103) and the second lifting column (203) or by the movement of the functional vehicle (1) and the transport vehicle (2); the left and right directions are adjusted by the moving module (106), and finally the pier cap (3) is adjusted to the specified position. S6. Tie the steel bars of the straight pier column (5) under the pier cap (3) in advance and install the formwork. When the pier cap (3) is adjusted to the designated position, connect the steel bars of the pier cap (3) and the straight pier column (5) and other connection nodes, and then pour concrete. After the concrete has reached the required strength, remove the formwork to complete the construction of a complete Y-shaped pier column.

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