Lifting device for bridge water surface pile tie beam and its construction method

Abstract

The objective is to provide a lifting device for bridge water surface pile tie beams and a construction method thereof. [Solution] A lifting device for bridge water surface pile tie beams and its construction method, the device comprises a lifting point support, a load-bearing mechanism, and a wooden formwork for the pile tie beam, a lifting member is provided between the lifting point support and the load-bearing mechanism, the load-bearing mechanism comprises a plurality of lower longitudinal beams (4) and bearing beams (5) provided on the plurality of lower longitudinal beams (4), the wooden formwork for the pile tie beam comprises square timber (6) and bamboo plywood (7), and the lifting member comprises a lifting tool (8), an upper adjustment nut (10) fitted on the outside of the lifting tool (8), and a lower lock nut (12) fitted on the outside of the lifting tool (8). The method includes Step 1: preparation before construction, Step 2: installation of the lifting device, Step 3: primary lifting of the bearing beam, Step 4: installation of the wooden formwork for the pile tie beam, Step 5: tying the reinforcing bar cages for the pier pile foundation and the pile tie beam, Step 6: secondary lifting of the wooden formwork for the bearing beam and the pile tie beam, and Step 7: installation of the steel formwork for the pier pile foundation and the side steel formwork for the pile tie beam and pouring concrete. The lifting device and construction method are used to lift the formwork for pile tie beam construction, completing the concrete pouring work for the pile tie beam.

Description

[Technical field]

[0001] The present invention relates to the technical field of bridge underwater pile tie beams, and in particular to a lifting device for bridge underwater pile tie beams and a construction method thereof. [Background technology]

[0002] The pile tie beam is a horizontal tie beam located at the top of the pile foundation (the base of the pier), which mainly increases the rigidity of the entire pile foundation, connects two pile foundations together, and bears the force together to withstand the upper load. The construction of underwater bridges, underwater pile foundations, tie beams, and bearing bases is a difficult part of the construction process, and in the past, construction methods such as cofferdams and steel casings were adopted based on the difference in the elevation and position of the pile tie beam. The construction procedure of the water surface tie beam has been further influenced by the construction process on land, and has changed the construction environment through cofferdams, steel casings, etc., and construction methods such as hoops and brackets continue to be selected. Due to the large amount of underwater work near the water surface, the construction process is complicated, the input cost of reusable formwork is high, the construction efficiency is low, it is not helpful to the protection of water resources, and there are also high construction safety risks.

[0003] Therefore, there is currently a lack of a lifting device and construction method for bridge water surface pile tie beams that has a reasonable design, can complete the concrete pouring work of pile tie beams by realizing the lifting of the construction formwork of pile tie beams, has convenient construction operations with few construction steps, has a short usage cycle of the construction reusable formwork, has low mechanical configuration requirements and low input costs, and can avoid problems such as river pollution caused by pouring of underwater bottom slab concrete, and can be effectively adapted to the construction of bridge water surface pile tie beams. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention has been made in consideration of such conventional problems, and has as its technical object to provide a lifting device for bridge water surface pile tie beams and a construction method thereof which has a rational design, enables the lifting of the construction formwork for the pile tie beam to be realized, completes the concrete pouring work for the pile tie beam, allows convenient construction operations with few construction steps, has a short usage cycle for the construction formwork, has low mechanical configuration requirements and low input costs, and avoids problems such as river pollution caused by pouring of underwater bottom slab concrete, and can be effectively adapted to the construction of bridge water surface pile tie beams. [Means for solving the problem]

[0005] In order to solve the above technical problems, the technical means adopted by the present invention is a lifting device for bridge water surface pile tie beams, which includes a suspension point support provided on a work platform, a load-bearing mechanism connected to the suspension point support, and a wooden formwork for pile tie beams provided on the load-bearing mechanism, and a lifting member is provided between the suspension point support and the load-bearing mechanism, The load-bearing mechanism includes a plurality of lower vertical beams provided under the suspension point support and a plurality of bearing beams provided on the lower vertical beams, and the wooden formwork for the pile tie beam includes a square timber provided on the bearing beam and a bamboo plywood laid on the square timber; The lifting member comprises a lifting device inserted between the suspension point support and the lower vertical beam, an upper adjusting nut into which the lifting device is fitted and located on the suspension point support, and a lower locking nut into which the lifting device is fitted and located at the bottom of the lower vertical beam, and is characterized in that the load-bearing mechanism is raised and lowered by tightening the upper adjusting nut.

[0006] In the above-mentioned bridge water surface pile tie beam lifting device, the work platform comprises steel pipe piles arranged in multiple rows, a connecting beam erected on the multiple rows of the steel pipe piles, and a Bailey beam erected on the connecting beam, the multiple rows of the steel pipe piles are arranged along the horizontal direction of the bridge, and each row of the steel pipe piles comprises a plurality of steel pipe piles arranged extending along the vertical direction of the bridge, and the interval between the steel pipe piles located on both sides of the pier pile foundation is larger than the interval between the other two adjacent steel pipe piles, The connecting beam is connected to the tops of the plurality of steel pipe piles, the number of the Bailey beams is a plurality of sets, the plurality of sets of the Bailey beams are arranged along the longitudinal direction of the connecting beam, the Bailey beams of each set include a Bailey beam located on both sides of the steel pipe pile, and the Bailey beams are arranged along the lateral direction of the bridge; The top of the Bailey beam is provided with a plurality of support beams arranged along the longitudinal direction of the Bailey beam, and I-shaped steel is provided on the tops of the plurality of support beams, the number of the I-shaped steels is plurality, the plurality of I-shaped steels are arranged along the longitudinal direction of the support beam, the longitudinal direction of the I-shaped steel coincides with the longitudinal direction of the Bailey beam, a running board is provided on the I-shaped steel, and a protective enclosure is provided on one side of the running board.

[0007] In the above-mentioned bridge water surface pile tie beam lifting device, the suspension point support includes a first suspension point support and a second suspension point support provided on both sides of the pier pile foundation, and the distance between the first suspension point support and the second suspension point support is greater than the outer diameter of the pier pile foundation; The number of the first suspension point supports and the second suspension point supports are both multiple and correspond one-to-one, the multiple first suspension point supports are arranged on a first set of Bailey beams, the multiple second suspension point supports are arranged on a second set of Bailey beams, and the first set of Bailey beams and the second set of Bailey beams are located on both sides of the pier pile foundation.

[0008] In the above-mentioned bridge water surface pile tie beam lifting device, the lower longitudinal beam comprises an intermediate lower longitudinal beam arranged between two pier pile foundations and an external lower longitudinal beam arranged outside the pier pile foundation, the number of the intermediate lower longitudinal beams is plural, the interval between two adjacent intermediate lower longitudinal beams is 0.5m to 1m, and the interval between two adjacent external lower longitudinal beams is 0.2m to 0.5m, The bearing beam comprises a first bearing beam, a second bearing beam and a third bearing beam, the lengths of the first bearing beam, the second bearing beam and the third bearing beam are all arranged along the lateral direction of the bridge, the first bearing beam and the third bearing beam are arranged symmetrically with respect to the pier pile foundation, and the distance between the first bearing beam and the third bearing beam is greater than the outer diameter of the pier pile foundation; The second bearing beam is provided between two pier pile foundations and comprises a second intermediate bearing beam located on a plurality of intermediate lower longitudinal beams, and a second external bearing beam located outside the pier pile foundation and located on an external lower longitudinal beam, wherein a gap is provided between the end of the second external bearing beam close to the pier pile foundation and the outer surface of the pier pile foundation, and both ends of the second intermediate bearing beam extend close to the outer surface of the pier pile foundation.

[0009] In the above-mentioned bridge water surface pile tie beam lifting device, an upper steel base plate is provided on the suspension point support, a lower steel base plate is provided at the bottom of the lower vertical beam, and the lifting device is inserted sequentially through the upper adjustment nut, the upper steel base plate, the suspension point support, the lower vertical beam, the lower steel base plate and the lower lock nut.

[0010] The above-mentioned lifting device for bridge water surface pile tie beams is characterized in that protective fences are provided at both ends of the lower vertical beam, a protective connecting rod is inserted between two adjacent protective fences, and the longitudinal direction of the protective connecting rod coincides with the lateral direction of the two pier pile foundations.

[0011] In addition, the present invention discloses a construction method for bridge water surface pile tie beam, which has simple steps, reasonable design and convenient construction, and the method includes the following steps: Step 1: Pre-construction preparation Step 101: According to the positions of the two pier pile foundations, remove the I-beams, the walkways and the Bailey beams on the two pier pile foundations, where the steel pipe pile intervals on both sides of the pier pile foundation are greater than the intervals of the other two adjacent steel pipe piles; Step 102: The Bailey beams located on both sides of the pier pile foundation are a first set of Bailey beams and a second set of Bailey beams, where the first set of Bailey beams and the second set of Bailey beams both include Bailey beams located on both sides of the steel pipe pile, and the Bailey beams are arranged along the lateral direction of the two pier pile foundations; Step 2: Install the lifting device Step 201: attaching a plurality of first suspension point supports to a first set of Bailey beams, and attaching a plurality of second suspension point supports to a second set of Bailey beams, where the distance between the first suspension point supports and the second suspension point supports is greater than the outer diameter of the pier pile foundation, and the first suspension point supports and the second suspension point supports are arranged symmetrically with respect to the pier pile foundation; Step 202: Install a hanging tool through each of the first and second hanging point supports, and attach an upper adjustment nut to the upper part where the hanging tool passes through the first and second hanging point supports; Step 203: Install a lower vertical beam under each of the first suspension point supports and the second suspension point supports, insert the lower part of the suspension tool through the lower vertical beam, and attach a lower lock nut; Step 204: Attaching the bearing beam to the lower longitudinal beam Step 3: Primary lifting of the bearing beam The upper adjustment nut is tightened and the lower part of the lifting device rises, moving the lower longitudinal beam and the bearing beam upward until the top of the bearing beam is moved to the altitude required for the installation of the pile tie beam. In the process of tightening the upper adjustment nut, the first suspension point support and the second suspension point support are attached to each other. Step 4: Installing the wooden formwork for the pile tie beam Step 401: attaching a plurality of beams to a bearing beam between two pier pile foundations, where the plurality of beams are arranged along the longitudinal direction of the bearing beam, and the length of the beams is greater than the outer diameter of the pier pile foundation; Step 402: attaching a bamboo plywood to a plurality of square timbers, where the longitudinal direction of the bamboo plywood is aligned with the longitudinal direction of the bearing beam, and the width of the bamboo plywood is the same as the length of the square timbers; Step 5: Binding of bridge pier pile foundation rebar cages and pile tie beam rebar cages Step 501: Tie a pile tie beam reinforcing bar cage between the tops of the pier pile foundations formed by pouring; Step 502: Continue to tie the pier pile foundation rebar cage at the top of the pier pile foundation formed by pouring until the top of the pier pile foundation is at the design elevation, and then tie the pile tie beam rebar cage and the pier pile foundation rebar cage together; Step 6: Secondary lifting of wooden formwork for bearing beams and pile tie beams The upper adjustment nut is tightened, and the lower part of the lifting device rises, so that the lower vertical beam, the bearing beam and the wooden formwork for the pile tie beam are moved upward until the height of the bearing beam, which continues to move upward, meets the set value of the downward deflection. At this point, the first and second suspension point supports are glued together during the process of tightening the upper adjustment nut. Step 7: Installation of the steel formwork for the pier pile foundation and the side steel formwork for the pile tie beam and pouring of concrete Step 701: symmetrically attach two pile tie beam side steel formworks to the bamboo plywood, and attach a pile tie beam top steel formwork to the top of the two pile tie beam side steel formworks to complete the installation of the pile tie beam formwork, where the interval between the two pile tie beam side steel formworks meets the design requirement of the pile tie beam width, the pile tie beam side steel formworks are arranged along the length of the bamboo plywood, the pile tie beam side steel formworks and the bamboo plywood are arranged vertically, and a gap is provided between the pile tie beam top steel formwork, the pile tie beam side steel formworks and the pile tie beam rebar cage; Step 702: The top of the pier pile foundation formed by pouring is fitted with a pier pile foundation steel formwork, where an opening is provided at a position close to the pile tie beam reinforcing bar cage on the pier pile foundation steel formwork, and both ends of the pile tie beam side steel formwork and the pile tie beam top steel formwork extend to the outer wall of the pier pile foundation steel formwork; Step 703: Pour concrete into the pile tie beam formwork and the pier pile foundation steel formwork until the concrete reaches 100% of the design strength, complete the construction of the bridge water surface pile tie beam, and remove the pile tie beam formwork, the pier pile foundation steel formwork and the lifting device.

[0012] In the above-mentioned bridge water surface pile tie beam construction method, an upper steel base plate is provided on the first suspension point support and the second suspension point support described in step 202, the upper end of the suspension tool is inserted through the upper steel base plate, the upper adjustment nut is bonded to the upper steel base plate, and the top of the suspension tool is higher than the top of the upper adjustment nut; A lower steel base plate is provided at the bottom of the lower vertical beam described in step 203, the lower part of the hoisting tool is inserted through the lower steel base plate, the lower lock nut is attached to the lower steel base plate, and the bottom of the hoisting tool is lower than the bottom of the lower lock nut; The pile tie beam construction required elevation in step 301 is the difference between the pile tie beam construction design elevation and , total thickness of lumber and bamboo plywood means that the 、 The range of the downward deflection setting value described in step 6 is characterized by being 1.5 cm to 2.5 cm.

[0013] In the above bridge water surface pile tie beam construction method, a lower longitudinal beam is provided under each of the first suspension point supports and the second suspension point supports in step 203. The specific steps are as follows: Step 2031: A plurality of intermediate lower longitudinal beams are arranged directly below each of the first suspension point supports and the second suspension point supports located between the two pier pile foundations, where the interval between two adjacent intermediate lower longitudinal beams is 0.5 m to 1 m; Step 2033: A plurality of external lower longitudinal beams are arranged directly below each of the first hanging point supports and second hanging point supports located outside the pier pile foundation, wherein the distance between two adjacent external lower longitudinal beams is 0.2m to 0.5m, and one end of the external lower longitudinal beam and the intermediate lower longitudinal beam is flush with the end of the first hanging point support away from the pier pile foundation, and the other end of the external lower longitudinal beam and the intermediate lower longitudinal beam is flush with the end of the second hanging point support away from the pier pile foundation.

[0014] In the above bridge water surface pile tie beam construction method, the specific process of installing the bearing beam on the lower longitudinal beam in step 204 is as follows: Step 2041: attaching a first bearing beam and a third bearing beam to a plurality of intermediate lower longitudinal beams and a plurality of outer lower longitudinal beams, wherein the first bearing beam and the third bearing beam are arranged symmetrically with respect to the pier pile foundation, and the distance between the first bearing beam and the third bearing beam is greater than the outer diameter of the pier pile foundation; Step 2042: A second intermediate bearing beam is attached to the multiple intermediate lower longitudinal beams, and a second external bearing beam is attached to the multiple external lower longitudinal beams, wherein a gap is provided between the end of the second external bearing beam close to the pier pile foundation and the outer surface of the pier pile foundation, both ends of the second intermediate bearing beam extend close to the outer surface of the pier pile foundation, the second intermediate bearing beam and the second external bearing beam constitute a second bearing beam, the lengths of the first bearing beam, the second bearing beam and the third bearing beam are evenly arranged along the lateral direction of the bridge, and the second bearing beam is located at the center of the line connecting the first bearing beam and the third bearing beam. Effect of the Invention

[0015] Compared with the prior art, the present invention has the following advantages: 1. The structure is simple, the design is reasonable, the construction is convenient, and the input cost is low.

[0016] 2. The adopted suspension point support is located on the work platform, which facilitates the installation of the suspension device, provides support for the upper end of the suspension device, and facilitates the restriction of the upper adjustable nut, thereby realizing the tightening of the upper adjustable nut and preventing the upper adjustable nut from moving up and down.

[0017] 3. The lifting member used comprises a lifting tool, an upper adjustable nut, and a lower locking nut. The lower part of the lifting tool is raised and lowered by tightening the upper adjustable nut via the lower locking nut, and the load-bearing mechanism is attached to the lifting tool via the lower locking nut, so that the load-bearing mechanism is raised and lowered by raising and lowering the lower part of the lifting tool.

[0018] 4. The load-bearing mechanism adopted comprises a lower longitudinal beam and a bearing beam. The lower longitudinal beam is provided and located directly below the suspension point support, which facilitates the connection between the lower longitudinal beam and the suspension point support through the suspension device. Bearing beams are provided and located on multiple lower longitudinal beams, and the longitudinal direction of the bearing beam is aligned with the transverse direction of the two pier pile foundations, which is convenient for the installation of the wooden formwork for the pile tie beam.

[0019] 5. The upper adjustable nut used is fitted with the hanging tool and located on the hanging point support, and converts the rotational movement of the upper adjustable nut into the lifting and lowering movement of the hanging tool. The lifting and lowering of the hanging tool lifts and lowers the wooden formwork for pile tie beams on the bearing beam, so that the height of the wooden formwork for pile tie beams can be accurately adjusted. The adjustment parts are simple, the mechanical configuration requirements are low, and the input costs are low.

[0020] 6. The steps of the adopted bridge water surface pile tie beam construction method are simple, easy to implement and easy to operate, and ensure the construction accuracy of the bridge water surface pile tie beam.

[0021] 7. The adopted construction method for the bridge water surface pile tie beam is simple in operation and has good usability. First, preparation is carried out before construction. Then, the lifting device is installed. Then, the bearing beam is primarily lifted up through the lifting device. Then, the wooden formwork for the pile tie beam is installed. Then, the pier pile foundation steel bar cage and the pile tie beam steel bar cage are bound together. Then, the bearing beam and the wooden formwork for the pile tie beam are secondarily lifted up through the lifting device. Finally, the pier pile foundation steel formwork and the side steel formwork of the pile tie beam are installed and concrete is poured. The construction of the bridge water surface pile tie beam is completed until the concrete reaches 100% of its designed strength.

[0022] In summary, the present invention has a reasonable design, realizes the lifting of the construction formwork of the pile tie beam, and completes the concrete pouring work of the pile tie beam, with convenient construction operations and few construction steps, a short service life of the construction reuse formwork, low mechanical configuration requirements, low input costs, and avoids problems such as river pollution caused by underwater pouring of the bottom slab concrete, and can be effectively applied to the construction of bridge water surface pile tie beams.

[0023] The technical means of the present invention will be described in more detail below with reference to the drawings and examples. [Brief description of the drawings]

[0024] [Figure 1] 1 is a schematic diagram of a bridge water surface pile tie beam lifting device of the present invention. [Diagram 2] FIG. 2 is a schematic location diagram of the load-bearing mechanism and suspension point supports of the present invention. [Diagram 3] 1 is a flow chart of the construction method for the bridge water surface pile tie beam of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] The bridge water surface pile tie beam lifting device shown in Figures 1 and 2 is a bridge water surface pile tie beam lifting device, and includes a lifting point support provided on a work platform 1, a load-bearing mechanism connected to the lifting point support, and a wooden formwork for pile tie beams provided on the load-bearing mechanism, and a lifting member is provided between the lifting point support and the load-bearing mechanism. The load-bearing mechanism includes a plurality of lower longitudinal beams 4 provided under the suspension point support and a plurality of bearing beams 5 provided on the plurality of lower longitudinal beams 4, and the wooden formwork for the pile tie beam includes a square timber 6 provided on the bearing beam 5 and a bamboo plywood 7 laid on the square timber 6; The lifting member comprises a lifting device 8 inserted between the suspension point support and the lower vertical beam 4, an upper adjusting nut 10 into which the lifting device 8 is fitted and which is positioned on the suspension point support, and a lower lock nut 12 into which the lifting device 8 is fitted and which is positioned at the bottom of the lower vertical beam 4, and the load-bearing mechanism is raised and lowered by tightening the upper adjusting nut 10.

[0026] In this embodiment, the work platform 1 includes steel pipe piles arranged in multiple rows, a connecting beam 1-2 erected on the multiple rows of the steel pipe piles, and a Bailey beam erected on the connecting beam 1-2, the multiple rows of the steel pipe piles 1-1 are arranged along the horizontal direction of the bridge, and each row of the steel pipe piles includes a plurality of steel pipe piles 1-1 arranged extending along the vertical direction of the bridge, and the interval between the steel pipe piles 1-1 located on both sides of the pier pile foundation 3 is larger than the interval between the other two adjacent steel pipe piles 1-1, The connecting beam 1-2 is connected to the tops of the plurality of steel pipe piles 1-1, the number of the Bailey beams is a plurality of sets, the plurality of sets of the Bailey beams are arranged along the longitudinal direction of the connecting beam 1-2, each set of the Bailey beams includes a Bailey beam 1-3 located on both sides of the steel pipe pile 1-1, and the Bailey beam 1-3 is arranged along the lateral direction of the bridge; A plurality of support beams 1-4 are provided on the top of the Bailey beam 1-3, arranged along the longitudinal direction of the Bailey beam 1-3, and I-shaped steel 1-6 is provided on the tops of the plurality of support beams 1-4, the number of the I-shaped steel 1-6 is plurality, the plurality of I-shaped steel 1-6 are arranged along the longitudinal direction of the support beam 1-4, the longitudinal direction of the I-shaped steel 1-6 coincides with the longitudinal direction of the Bailey beam 1-3, a walkway 1-5 is provided on the I-shaped steel 1-6, and a protective enclosure 1-7 is provided on one side of the walkway 1-5.

[0027] In this embodiment, the suspension point support includes a first suspension point support 2-1 and a second suspension point support 2-2 provided on both sides of the pier pile foundation 3, and the distance between the first suspension point support 2-1 and the second suspension point support 2-2 is greater than the outer diameter of the pier pile foundation 3; The number of the first hanging point supports 2-1 and the second hanging point supports 2-2 are both multiple and correspond one to one, the multiple first hanging point supports 2-1 are arranged in a first set of Bailey beams, the multiple second hanging point supports 2-2 are arranged in a second set of Bailey beams, and the first set of Bailey beams 1-3 and the second set of Bailey beams are located on both sides of the pier pile foundation 3.

[0028] In this embodiment, the lower longitudinal beam 4 includes an intermediate lower longitudinal beam 4-1 arranged between two pier pile foundations 3 and an external lower longitudinal beam 4-2 arranged outside the pier pile foundation 3, the number of the intermediate lower longitudinal beams 4-1 is plural, the interval between two adjacent intermediate lower longitudinal beams 4-1 is 0.5m to 1m, and the interval between two adjacent external lower longitudinal beams 4-2 is 0.2m to 0.5m, The bearing beam 5 includes a first bearing beam 5-1, a second bearing beam 5-2, and a third bearing beam 5-3, the lengths of the first bearing beam 5-1, the second bearing beam 5-2, and the third bearing beam 5-3 are all arranged along the lateral direction of the bridge, the first bearing beam 5-1 and the third bearing beam 5-3 are arranged symmetrically with respect to the pier pile foundation 3, and the distance between the first bearing beam 5-1 and the third bearing beam 5-3 is greater than the outer diameter of the pier pile foundation 3; The second bearing beam 5-2 is arranged between two pier pile foundations 3 and comprises a second intermediate bearing beam located on a plurality of intermediate lower longitudinal beams 4-1, and a second external bearing beam 5 arranged outside the pier pile foundation 3 and located on the external lower longitudinal beam 4-2, with a gap provided between the end of the second external bearing beam close to the pier pile foundation 3 and the outer surface of the pier pile foundation 3, and both ends of the second intermediate bearing beam extending close to the outer surface of the pier pile foundation 3.

[0029] In this embodiment, an upper steel base plate 9 is provided on the suspension point support, and a lower steel base plate 11 is provided at the bottom of the lower vertical beam 4, and the suspension device 8 is inserted through the upper adjustment nut 10, the upper steel base plate 9, the suspension point support, the lower vertical beam 4, the lower steel base plate 11 and the lower lock nut 12 in sequence.

[0030] In this embodiment, protective fences 13 are provided at both ends of the lower vertical beam 4, and a protective connecting rod 14 is installed between two adjacent protective fences 13, with the longitudinal direction of the protective connecting rod 14 coinciding with the lateral direction of the two pier pile foundations 3.

[0031] In this embodiment, the hoisting device 8 is a finish rolled rebar having a diameter of φ25.

[0032] In this embodiment, the suspension point support is located on the work platform 1, which facilitates the installation of the suspension device 8, provides support for the upper end of the suspension device 8, and facilitates the restriction of the upper adjustable nut 10, thereby realizing the tightening of the upper adjustable nut 10 and preventing the upper adjustable nut 10 from moving up and down.

[0033] In this embodiment, the lifting member comprises a lifting tool 8, an upper adjustable nut 10, and a lower locking nut 12, and the load-bearing mechanism is raised and lowered by tightening the upper adjustable nut 10 via the lower locking nut 12, and the load-bearing mechanism is attached to the lifting tool 8 via the lower locking nut 12, so that the load-bearing mechanism is raised and lowered by raising and lowering the lifting tool 8.

[0034] In this embodiment, the load-bearing mechanism includes a lower longitudinal beam 4 and a bearing beam 5. The lower longitudinal beam 4 is provided and located below the suspension point support, which facilitates the connection between the lower longitudinal beam 4 and the suspension point support through the suspension device 8. The bearing beam 5 is provided and located on multiple lower longitudinal beams 4, and the longitudinal direction of the bearing beam 5 is aligned with the lateral direction of the two pier pile foundations 3, which is convenient for installing the wooden formwork for the pile tie beam.

[0035] In this embodiment, the upper adjustable nut 10 is fitted with the hanging device 8 and located on the hanging point support, and the rotational movement of the upper adjustable nut 10 is converted into the rising and lowering movement of the hanging device 8. The rising and lowering of the hanging device 8 raises and lowers the wooden formwork for the pile tie beam on the bearing beam 5, so that the height of the wooden formwork for the pile tie beam can be accurately adjusted, and the adjustment parts are simple, the mechanical configuration requirements are low, and the input costs are low.

[0036] In this embodiment, the suspension point supports provided include a first suspension point support 2-1 and a second suspension point support 2-2 provided on both sides of the pier pile foundation 3. Firstly, the purpose is to form a gap between the first suspension point support 2-1 and the second suspension point support 2-2, and the distance between the first suspension point support 2-1 and the second suspension point support 2-2 is greater than the outer diameter of the pier pile foundation 3, which is convenient for opening the upper space during construction and provides working conditions for vertically lifting the lower longitudinal beam 4 and the formwork. Secondly, the purpose is to accommodate both ends of the lower longitudinal beam 4, and the stability of the installation of the lower longitudinal beam 4 is improved through the connection of both ends of the lower longitudinal beam 4.

[0037] In this embodiment, the provided bearing beam 5 comprises a first bearing beam 5-1, a second bearing beam 5-2, and a third bearing beam 5-3, and the cross-sectional dimensions of the bearing beams are small, thereby saving on material costs and improving operability. The small cross section reduces the weight of the lower vertical beam 4, making manual adjustment easier and reducing the number of personnel and cranes required.

[0038] In this embodiment, the distance between the steel pipe piles 1-1 located on both sides of the pier pile foundation 3 is greater than the distance between the other two adjacent steel pipe piles 1-1, and the Bailey beam 1-3, I-beam 1-6 and running board 1-5 can be removed from the top of the pier pile foundation 3, leaving space above the pile tie beam, providing conditions for the installation of a lifting device and the simultaneous lifting of the load-bearing mechanism and the entire wooden formwork for the pile tie beam, changing work on water to work on a platform, improving the efficiency and shortening the construction period.

[0039] The construction method of the bridge water surface pile tie beam shown in Figure 3 includes the following steps: Step 1: Pre-construction preparation Step 101: Based on the positions of the two pier pile foundations 3, remove the I-shaped steel 1-6, the walkway 1-5 and the Bailey beam 1-3 on the two pier pile foundations 3, and the intervals of the steel pipe piles 1-1 located on both sides of the pier pile foundation 3 are larger than the intervals of the other two adjacent steel pipe piles 1-1; Step 102: The Bailey beams 1-3 located on both sides of the pier pile foundation 3 are a first set of Bailey beams and a second set of Bailey beams, where the first set of Bailey beams and the second set of Bailey beams both include Bailey beams 1-3 located on both sides of the steel pipe pile 1-1, and the Bailey beams 1-3 are arranged along the lateral direction of the two pier pile foundations 3; Step 2: Install the lifting device Step 201: attaching a plurality of first suspension point supports 2-1 to a first set of Bailey beams, and attaching a plurality of second suspension point supports 2-2 to a second set of Bailey beams, where the distance between the first suspension point supports 2-1 and the second suspension point supports 2-2 is greater than the outer diameter of the pier pile foundation 3, and the first suspension point supports 2-1 and the second suspension point supports 2-2 are arranged symmetrically with respect to the pier pile foundation 3; Step 202: Install the suspending device 8 through each of the first suspension point support 2-1 and the second suspension point support 2-2, and attach the upper adjustment nut 10 to the upper part where the suspending device 8 passes through the first suspension point support 2-1 and the second suspension point support 2-2; Step 203: Install the lower vertical beam 4 under each of the first suspension point supports 2-1 and the second suspension point supports 2-2, insert the lower part of the suspension device 8 through the lower vertical beam 4, and attach the lower lock nut 12. Step 204: Attaching the bearing beam 5 to the lower longitudinal beam 4; Step 3: Primary lifting of bearing beam 5 The upper adjustment nut 10 is tightened, and the lower part of the hanging device 8 rises, so that the lower vertical beam 4 and the bearing beam 5 are moved upward until the top of the bearing beam 5 is moved to the altitude required for the construction of the pile tie beam. During the process of tightening the upper adjustment nut 10, the first hanging point support 2-1 and the second hanging point support 2-2 are attached together. Step 4: Installing the wooden formwork for the pile tie beam Step 401: attaching a plurality of square members 6 to the bearing beam 5 between two pier pile foundations 3, wherein the plurality of square members 6 are arranged along the longitudinal direction of the bearing beam 5, and the length of the square members 6 is greater than the outer diameter of the pier pile foundations 3; Step 402: Attach the bamboo plywood 7 to the multiple square timbers 6, where the longitudinal direction of the bamboo plywood 7 is aligned with the longitudinal direction of the bearing beam 5, and the width of the bamboo plywood 7 is the same as the length of the square timbers 6; Step 5: Binding of bridge pier pile foundation rebar cages and pile tie beam rebar cages Step 501: Tie a pile tie beam reinforcing bar cage between the tops of the pier pile foundations 3 formed by pouring. Step 502: Continue to tie the pier pile foundation reinforcing bar cage at the top of the pier pile foundation 3 formed by pouring until the top of the pier pile foundation 3 is at the design elevation, and then tie the pile tie beam reinforcing bar cage and the pier pile foundation reinforcing bar cage together. Step 6: Secondary lifting of wooden formwork for bearing beam 5 and pile tie beam The upper adjustment nut 10 is tightened, and the lower part of the hanging device 8 rises, so that the lower vertical beam 4, the bearing beam 5 and the wooden formwork for the pile tie beam are moved upward until the height of the bearing beam 5, which continues to move upward, meets the set value of the downward deflection. Here, the first hanging point support 2-1 and the second hanging point support 2-2 are glued together in the process of tightening the upper adjustment nut 10. Step 7: Installation of the steel formwork for the pier pile foundation and the side steel formwork for the pile tie beam and pouring of concrete Step 701: symmetrically install two pile tie beam side steel formworks on the bamboo plywood 7, and install a pile tie beam top steel formwork on the top of the two pile tie beam side steel formworks to complete the installation of the pile tie beam formwork, where the interval between the two pile tie beam side steel formworks meets the design requirements of the pile tie beam width, the pile tie beam side steel formworks are arranged along the length of the bamboo plywood 7, the pile tie beam side steel formworks and the bamboo plywood 7 are arranged vertically, and a gap is provided between the pile tie beam top steel formwork, the pile tie beam side steel formworks and the pile tie beam rebar cage; Step 702: The top of the pier pile foundation 3 formed by pouring is fitted with a pier pile foundation steel formwork, where an opening is provided at a position close to the pile tie beam reinforcing bar cage on the pier pile foundation steel formwork, and both ends of the pile tie beam side steel formwork and the pile tie beam top steel formwork extend to the outer wall of the pier pile foundation steel formwork, Step 703: Pour concrete into the pile tie beam formwork and the pier pile foundation steel formwork until the concrete reaches 100% of the design strength, complete the construction of the bridge water surface pile tie beam, and remove the pile tie beam formwork, the pier pile foundation steel formwork and the lifting device.

[0040] In this embodiment, the first suspension point support 2-1 and the second suspension point support 2-2 described in step 202 are provided with an upper steel base plate 9, the upper end of the suspension tool 8 is inserted through the upper steel base plate 9, the upper adjustment nut 10 is attached to the upper steel base plate 9, and the top of the suspension tool 8 is higher than the top of the upper adjustment nut 10; A lower steel base plate 11 is provided at the bottom of the lower vertical beam 4 described in step 203, the lower part of the hoisting device 8 is inserted through the lower steel base plate 11, the lower lock nut 12 is attached to the lower steel base plate 11, and the bottom of the hoisting device 8 is lower than the bottom of the lower lock nut 12; The pile tie beam construction required elevation in step 301 is the difference between the pile tie beam construction design elevation and , total thickness of lumber and bamboo plywood means that the 、 The range of downward deflection settings described in step 6 is 1.5 cm to 2.5 cm.

[0041] In this embodiment, the lower vertical beam 4 is provided under each of the first suspension point supports 2-1 and the second suspension point supports 2-2 in step 203. The specific steps are as follows: Step 2031: A plurality of intermediate lower longitudinal beams 4-1 are arranged directly below each of the first suspension point supports 2-1 and the second suspension point supports 2-2 located between the two pier pile foundations 3, and the interval between the two adjacent intermediate lower longitudinal beams 4-1 is 0.5 m to 1 m; Step 2033: A plurality of external lower vertical beams 4-2 are arranged directly below each of the first hanging point support members 2-1 and the second hanging point support members 2-2 located outside the pier pile foundation 3, where the distance between two adjacent external lower vertical beams 4-2 is 0.2m to 0.5m, one end of the external lower vertical beam 4-2 and the intermediate lower vertical beam 4-1 is flush with the end of the first hanging point support member 2-1 away from the pier pile foundation 3, and the other end of the external lower vertical beam 4-2 and the intermediate lower vertical beam 4-1 is flush with the end of the second hanging point support member 2-2 away from the pier pile foundation 3.

[0042] In this embodiment, the specific process of attaching the bearing beam 5 to the lower vertical beam 4 in step 204 is as follows: Step 2041: A first bearing beam 5-1 and a third bearing beam 5-3 are attached to the plurality of intermediate lower longitudinal beams 4-1 and the plurality of outer lower longitudinal beams 4-2, wherein the first bearing beam 5-1 and the third bearing beam 5-3 are arranged symmetrically with respect to the pier pile foundation 3, and the distance between the first bearing beam 5-1 and the third bearing beam 5-3 is greater than the outer diameter of the pier pile foundation 3; Step 2042: A second intermediate bearing beam 5 is attached to the multiple intermediate lower longitudinal beams 4-1, and a second external bearing beam 5 is attached to the multiple external lower longitudinal beams 4-2, in which a gap is provided between the end of the second external bearing beam 5 close to the pier pile foundation 3 and the outer surface of the pier pile foundation 3, both ends of the second intermediate bearing beam 5 extend close to the outer surface of the pier pile foundation 3, the second intermediate bearing beam 5 and the second external bearing beam 5 constitute a second bearing beam 5-2, the lengths of the first bearing beam 5-1, the second bearing beam 5-2 and the third bearing beam 5-3 are evenly arranged along the lateral direction of the bridge, and the second bearing beam 5-2 is located at the center of the line connecting the first bearing beam 5-1 and the third bearing beam 5-3.

[0043] In this embodiment, the design strength in step 703 is C15, C20, C30 or C40, which can be adjusted according to the specific construction design requirements in practical use.

[0044] Furthermore, in this embodiment, when the concrete strength reaches 10 MPa, the side steel formwork of the pile tie beam and the top steel formwork of the pile tie beam can be removed, and when the concrete reaches 100% of its design strength, the steel formwork for the pier pile foundation is removed and the upper adjustment nut 10 is rotated in the reverse direction, causing the lower part of the lifting device 8 to descend, lowering the lower longitudinal beam 4, bearing beam 5 and wooden formwork for the pile tie beam, and then the lifting device is removed.

[0045] In this embodiment, it is worth noting that in actual use, the bottom of the bridge water surface pile tie beam is higher than the water surface.

[0046] In this embodiment, it is worth noting that, during actual use, the square timber 6 and the bamboo plywood 7 are positioned between the two pier pile foundations 3, and the two pier pile foundations 3 are arranged along the lateral direction of the bridge.

[0047] In summary, the present invention has a reasonable design, realizes the lifting of the construction formwork of the pile tie beam, and completes the concrete pouring work of the pile tie beam, with convenient construction operations and few construction steps, a short service life of the construction reuse formwork, low mechanical configuration requirements, low input costs, and avoids problems such as river pollution caused by underwater pouring of the bottom slab concrete, and can be effectively applied to the construction of bridge water surface pile tie beams.

[0048] What has been described above is only a preferred embodiment of the present invention, and the present invention is not limited to this embodiment. Simple modifications, changes and equivalent structural changes made to the above embodiment based on the technical essence of the present invention fall within the scope of protection of the technical means of the present invention. [Explanation of symbols]

[0049] 10 Upper adjustment nut 1 Work platform 1-1 Steel pipe pile 1-2 Connecting beam 1-3 Bailey Beam 1-4 Support beam 1-5 Walking Board 1-6 I-shaped steel 1-7 Protective enclosure 11 Lower Steel Base Plate 12 Lower lock nut 13 Protective fence 14 Protective connecting rod 2-1 First suspension point support 2-2 Second suspension point support 3. Pier pile foundation 4 Lower longitudinal beam 4-1 Middle lower vertical beam 4-2 External lower vertical beam 5 Bearing beam 5-1 First bearing beam 5-2 Second bearing beam 5-3 3rd bearing beam 6. Timber 7 Bamboo plywood 8 Lifting equipment 9 Upper Steel Base Plate

Claims

1. A lifting device for bridge water surface pile tie beams, comprising a suspension point support provided on a work platform (1), a load-bearing mechanism connected to the suspension point support, and a wooden formwork for pile tie beams provided on the load-bearing mechanism, and a lifting member provided between the suspension point support and the load-bearing mechanism; The load-bearing mechanism includes a plurality of lower longitudinal beams (4) provided under the suspension point support and a plurality of bearing beams (5) provided on the plurality of lower longitudinal beams (4). The wooden formwork for the pile tie beam includes a square timber (6) provided on the bearing beam (5) and a bamboo plywood (7) laid on the square timber (6). The lifting member includes a lifting tool (8) that is inserted between the suspension point support and the lower vertical beam (4), an upper adjustment nut (10) that is positioned on the suspension point support and into which the lifting tool (8) is fitted, and a lower lock nut (12) that is positioned at the bottom of the lower vertical beam (4) and into which the lifting tool (8) is fitted. The load-bearing mechanism is raised and lowered by tightening the upper adjustment nut (10). The lower longitudinal beam (4) comprises an intermediate lower longitudinal beam (4-1) arranged between two pier pile foundations (3) and an external lower longitudinal beam (4-2) arranged outside the pier pile foundation (3), the number of the intermediate lower longitudinal beams (4-1) is plural, the interval between two adjacent intermediate lower longitudinal beams (4-1) is 0.5 m to 1 m, and the interval between two adjacent external lower longitudinal beams (4-2) is 0.2 m to 0.5 m, The bearing beam (5) comprises a first bearing beam (5-1), a second bearing beam (5-2) and a third bearing beam (5-3), the first bearing beam (5-1), the second bearing beam (5-2) and the third bearing beam (5-3) are all arranged along the lateral direction of the bridge, the first bearing beam (5-1) and the third bearing beam (5-3) are arranged symmetrically with respect to the pier pile foundation (3), and the distance between the first bearing beam (5-1) and the third bearing beam (5-3) is greater than the outer diameter of the pier pile foundation (3); The second bearing beam (5-2) is provided between two of the pier pile foundations (3) and includes a second intermediate bearing beam (5) located on a plurality of intermediate lower longitudinal beams (4-1), and a second external bearing beam (5) arranged outside the pier pile foundation (3) and located on the external lower longitudinal beam (4-2). A gap is provided between the end of the second external bearing beam (5) close to the pier pile foundation (3) and the outer surface of the pier pile foundation (3), and both ends of the second intermediate bearing beam (5) extend close to the outer surface of the pier pile foundation (3). A lifting device for bridge water surface pile tie beams, characterized by the above.

2. The work platform (1) comprises steel pipe piles arranged in multiple rows, a connecting beam (1-2) erected on the multiple rows of the steel pipe piles, and a Bailey beam erected on the connecting beam (1-2), the multiple rows of the steel pipe piles (1-1) are arranged along the horizontal direction of the bridge, and the steel pipe piles in each row are arranged to extend along the vertical direction of the bridge, and the interval between the steel pipe piles (1-1) located on both sides of the pier pile foundation (3) is larger than the interval between the other two adjacent steel pipe piles (1-1), The connecting beam (1-2) is connected to the tops of the plurality of steel pipe piles (1-1), the number of the Bailey beams is a plurality of sets, the plurality of sets of the Bailey beams are arranged along the longitudinal direction of the connecting beam (1-2), each set of the Bailey beams includes a Bailey beam (1-3) located on both sides of the steel pipe pile (1-1), and the Bailey beam (1-3) is arranged along the lateral direction of the bridge, A plurality of support beams (1-4) are arranged on the top of the Bailey beam (1-3) so that the longitudinal direction of the support beams (1-4) is perpendicular to the longitudinal direction of the Bailey beam (1-3). I-shaped steel (1-6) is provided on the top of the plurality of support beams (1-4). The number of the I-shaped steel (1-6) is plural, the plurality of I-shaped steel (1-6) is arranged along the longitudinal direction of the support beam (1-4), the longitudinal direction of the I-shaped steel (1-6) coincides with the longitudinal direction of the Bailey beam (1-3), a walkway (1-5) is provided on the I-shaped steel (1-6), and a protective enclosure (1-7) is provided on one side of the walkway (1-5). The lifting device for bridge water surface pile tie beams according to claim 1 .

3. The work platform (1) comprises a plurality of rows of steel pipe piles, a connecting beam (1-2) erected on the plurality of rows of the steel pipe piles, and a Bailey beam erected on the connecting beam (1-2), The suspension point support includes a first suspension point support (2-1) and a second suspension point support (2-2) provided on both sides of the pier pile foundation (3), and the distance between the first suspension point support (2-1) and the second suspension point support (2-2) is greater than the outer diameter of the pier pile foundation (3); The number of the first suspension point supports (2-1) and the second suspension point supports (2-2) are both multiple and correspond one to one, the multiple first suspension point supports (2-1) are arranged on the first set of Bailey beams, the multiple second suspension point supports (2-2) are arranged on the second set of Bailey beams, and the first set of Bailey beams and the second set of Bailey beams are located on both sides of the pier pile foundation (3). The lifting device for bridge water surface pile tie beams according to claim 1 .

4. An upper steel base plate (9) is provided on the suspension point support, a lower steel base plate (11) is provided at the bottom of the lower vertical beam (4), and the suspension device (8) is inserted through the upper adjustment nut (10), the upper steel base plate (9), the suspension point support, the lower vertical beam (4), the lower steel base plate (11), and the lower lock nut (12) in this order. The lifting device for bridge water surface pile tie beams according to claim 1 .

5. The lifting device for bridge water surface pile tie beams as described in claim 1, characterized in that protective fences (13) are provided at both ends of the lower vertical beam (4), a protective connecting rod (14) is installed between two adjacent protective fences (13), and the longitudinal direction of the protective connecting rod (14) coincides with the direction from one of the two adjacent bridge pier pile foundations (3) to the other.

6. A construction method for bridge water surface pile tie beams, comprising the steps of: Step 1: Pre-construction preparation Step 101: Based on the positions of the two pier pile foundations (3), remove the I-shaped steel (1-6), the walkway (1-5) and the Bailey beam (1-3) on the two pier pile foundations (3), where the interval between the steel pipe piles (1-1) on both sides of the pier pile foundation (3) is greater than the interval between the other two adjacent steel pipe piles (1-1); Step 102: The Bailey beams (1-3) located on both sides of the pier pile foundation (3) are a first set of Bailey beams and a second set of Bailey beams, where the first set of Bailey beams and the second set of Bailey beams both include the Bailey beams (1-3) located on both sides of the steel pipe pile (1-1), and the Bailey beams (1-3) are arranged along the lateral direction of the two pier pile foundations (3); Step 2: Install the lifting device Step 201: attaching a plurality of first suspension point supports (2-1) to the first set of Bailey beams, and attaching a plurality of second suspension point supports (2-2) to the second set of Bailey beams, wherein the distance between the first suspension point supports (2-1) and the second suspension point supports (2-2) is greater than the outer diameter of the pier pile foundation (3), and the first suspension point supports (2-1) and the second suspension point supports (2-2) are symmetrically arranged with respect to the pier pile foundation (3); Step 202: Install a suspending device through each of the first suspension point supports (2-1) and the second suspension point supports (2-2), and attach an upper adjustment nut (10) to the upper part where the suspending device (8) passes through the first suspension point support (2-1) and the second suspension point support (2-2); Step 203: Provide a lower vertical beam (4) under each of the first suspension point supports (2-1) and the second suspension point supports (2-2), insert the lower part of the suspension device (8) through the lower vertical beam (4), and attach a lower lock nut (12); Step 204: Attach the bearing beam (5) to the lower longitudinal beam (4); Step 3: Primary lifting of the bearing beam (5) The upper adjusting nut (10) is tightened, and the lower part of the hanging device (8) rises, thereby moving the lower vertical beam (4) and the bearing beam (5) upward until the top of the bearing beam (5) is moved to the altitude required for the construction of the pile tie beam. In the process of tightening the upper adjusting nut (10), the upper adjusting nut (10) is attached to the first hanging point support (2-1) and the second hanging point support (2-2). Step 4: Installing the wooden formwork for the pile tie beam Step 401: attaching a plurality of beams (6) to the bearing beam (5) between the two pier pile foundations (3), wherein the longitudinal direction of the plurality of beams (6) is arranged perpendicular to the longitudinal direction of the bearing beam (5), and the length of the beams (6) is greater than the outer diameter of the pier pile foundations (3); Step 402: Attach a bamboo plywood (7) to a plurality of the square timbers (6), where the longitudinal direction of the bamboo plywood (7) is aligned with the longitudinal direction of the bearing beam (5), and the width of the bamboo plywood (7) is the same as the length of the square timbers (6); Step 5: Binding of the pier pile foundation rebar cage and the pile tie beam rebar cage Step 501: Tie a pile tie beam reinforcing bar cage between the tops of the pier pile foundation (3) formed by pouring; Step 502: Continue to tie the pier pile foundation reinforcing bar cage at the top of the pier pile foundation (3) formed by pouring until the top of the pier pile foundation (3) is designed elevation, and then the pile tie beam reinforcing bar cage and the pier pile foundation reinforcing bar cage are fastened together; Step 6: Secondary lifting of the wooden formwork for the bearing beam (5) and the pile tie beam The upper adjusting nut (10) is tightened, and the lower part of the hanging device (8) rises, so that the lower vertical beam (4), the bearing beam (5) and the wooden formwork for the pile tie beam are moved upward until the height of the bearing beam (5), which continues to move upward, meets the set value of the downward deflection of the bearing beam (5). In this state, during the process of tightening the upper adjusting nut (10), the upper adjusting nut (10) is attached to the first hanging point support (2-1) and the second hanging point support (2-2). Step 7: Installation of the steel formwork for the pier pile foundation and the steel formwork for the pile tie beam sides and pouring of concrete Step 701: symmetrically attach the two pile tie beam side steel formworks to the bamboo plywood (7), and attach a pile tie beam top steel formwork to the top of the two pile tie beam side steel formworks, thereby completing the installation of the pile tie beam formwork, in which the interval between the two pile tie beam side steel formworks meets the design requirement of the pile tie beam width, the pile tie beam side steel formworks are arranged along the length of the bamboo plywood (7), the pile tie beam side steel formwork and the bamboo plywood (7) are arranged vertically, and a gap is provided between the pile tie beam top steel formwork, the pile tie beam side steel formwork and the pile tie beam rebar cage; Step 702: The top of the pier pile foundation (3) formed by pouring is fitted with a pier pile foundation steel formwork, where an opening is provided at a position close to the pile tie beam reinforcing bar cage on the pier pile foundation steel formwork, and both ends of the pile tie beam side steel formwork and the pile tie beam top steel formwork extend to the outer wall of the pier pile foundation steel formwork, Step 703: Pour concrete into the pile tie beam formwork and the pier pile foundation steel formwork until the concrete reaches 100% of the design strength, complete the construction of the bridge water surface pile tie beam, and remove the pile tie beam formwork, the pier pile foundation (3) steel formwork and the lifting device. A construction method for bridge water surface pile tie beams, characterized by:

7. An upper steel base plate (9) is provided on the first suspension point support (2-1) and the second suspension point support (2-2) described in step 202, the upper end of the suspension tool (8) is inserted through the upper steel base plate (9), the upper adjustment nut (10) is attached to the upper steel base plate (9), and the top of the suspension tool (8) is higher than the top of the upper adjustment nut (10); A lower steel base plate (11) is provided at the bottom of the lower vertical beam (4) described in step 203, the lower part of the hoisting tool (8) is inserted through the lower steel base plate (11), the lower lock nut (12) is attached to the lower steel base plate (11), and the bottom of the hoisting tool (8) is lower than the bottom of the lower lock nut (12); The pile tie beam installation required altitude in step 301 means the pile tie beam installation design altitude minus the total thickness of the square timber (6) and the bamboo plywood (7); The range of downward deflection settings described in step 6 is 1.5 cm to 2.5 cm. The construction method for a bridge water surface pile tie beam according to claim 6 .

8. In step 203, the lower vertical beam (4) is provided under each of the first suspension point supports (2-1) and the second suspension point supports (2-2). The specific steps are as follows: Step 2031: A plurality of intermediate lower longitudinal beams (4-1) are arranged directly below each of the first suspension point supports (2-1) and the second suspension point supports (2-2) located between the two pier pile foundations (3), where the interval between two adjacent intermediate lower longitudinal beams (4-1) is 0.5 m to 1 m; Step 2033: A plurality of external lower longitudinal beams (4-2) are arranged directly below each of the first suspension point supports (2-1) and the second suspension point supports (2-2) located outside the pier pile foundation (3), where the interval between two adjacent external lower longitudinal beams (4-2) is 0.2 m to 0.5 m, one end of the external lower longitudinal beam (4-2) and the intermediate lower longitudinal beam (4-1) are flush with the end of the first suspension point support (2-1) away from the pier pile foundation (3), and the other end of the external lower longitudinal beam (4-2) and the intermediate lower longitudinal beam (4-1) are flush with the end of the second suspension point support (2-2) away from the pier pile foundation (3). The construction method for a bridge water surface pile tie beam according to claim 6 .

9. The specific process of attaching the bearing beam (5) to the lower vertical beam (4) in step 204 is as follows: Step 2041: attaching a first bearing beam (5-1) and a third bearing beam (5-3) to the plurality of intermediate lower longitudinal beams (4-1) and the plurality of outer lower longitudinal beams (4-2), wherein the first bearing beam (5-1) and the third bearing beam (5-3) are arranged symmetrically with respect to the pier pile foundation (3), and the distance between the first bearing beam (5-1) and the third bearing beam (5-3) is greater than the outer diameter of the pier pile foundation (3); Step 2042: attach a second intermediate bearing beam to the plurality of intermediate lower longitudinal beams (4-1), and attach a second external bearing beam (5) to the plurality of external lower longitudinal beams (4-2), wherein a gap is provided between the end of the second external bearing beam (5) close to the pier pile foundation (3) and the outer surface of the pier pile foundation (3), both ends of the second intermediate bearing beam extend close to the outer surface of the pier pile foundation (3), the second intermediate bearing beam and the second external bearing beam constitute a second bearing beam (5-2), the lengths of the first bearing beam (5-1), the second bearing beam (5-2) and the third bearing beam (5-3) are uniformly arranged along the lateral direction of the bridge, and the second bearing beam (5-2) is located at the center of the line connecting the first bearing beam (5-1) and the third bearing beam (5-3). The construction method for a bridge water surface pile tie beam according to claim 8.

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