Bridge special-shaped ring construction method

Abstract

The invention relates to a bridge special-shaped ring construction method, and belongs to the field of bridge construction.The bridge special-shaped ring construction method comprises the steps that S100, a tower base foundation is constructed; s200, tower base construction is carried out; s300, a hoisting platform is installed; s400, a main tower is installed; s500, a dismantling stage; wherein the step S400 comprises the steps that S420, a tower body P1 is hoisted through a hoisting platform, and the tower body P1 is connected with concrete in the cofferdam; s430, tower bodies P2 to P5 are sequentially hoisted and installed through the hoisting platform; s440, after construction of the main bridge body is completed, the tower body is connected with the main bridge body; s450, the tower bodies P6 to P11 are hoisted and installed through the hoisting system in sequence; s460, longitudinal prestress temporary cables are arranged on the tower body P10, the tower body P11 and the tower body P12, and the longitudinal prestress temporary cables are tensioned to adjust the line shape; and S470, the tower body P13 is installed.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and in particular relates to a construction method for a special-shaped bridge ring. Background Art

[0002] A bridge is a structure that spans a river, strait, lake, canyon or other obstacle to allow vehicles and pedestrians to pass. It is not only an important part of transportation infrastructure, but also the crystallization of human wisdom and engineering technology. The construction of bridges has a long history, from simple wooden bridges and stone bridges in ancient times to modern steel bridges, concrete bridges, suspension bridges, cable-stayed bridges and other complex structures.

[0003] In the prior art, some bridges include a main tower, which is also called a cable tower. It is a tower-shaped structure that supports the main cable in a suspension bridge or a cable-stayed bridge. As an important load-bearing component of the bridge, it plays a vital role in the overall structure and performance of the bridge. At present, in order to make the overall appearance of the bridge more beautiful and unique, the shape of the main tower of some bridges is designed to be a special-shaped ring.

[0004] In the prior art, there is no unified construction method or rule for the construction method of the special-shaped ring. Therefore, a construction method for the special-shaped ring of a bridge is urgently needed to fill the vacancy in this area. Summary of the invention

[0005] In view of the shortcomings existing in the related art, the present invention provides a bridge special-shaped ring construction method, which ensures the systematicness and orderliness of the construction process through detailed step division, such as tower base foundation construction, tower base construction, hoisting platform installation, main tower installation and dismantling stages, etc. In particular, in the process of tower body prefabrication and hoisting, the factory prefabrication and on-site assembly are adopted, which not only improves the construction efficiency, but also ensures the precise alignment and installation quality of the tower body through pre-inspection and acceptance. In the construction of the tower base, the stability and bearing capacity of the tower base foundation are enhanced through the steps of impact drilling construction, steel pipe pile pouring, underwater bottom sealing concrete and large-volume concrete pouring of the cap. At the same time, in the process of tower body hoisting, the stability and safety of the hoisting process are ensured by reasonably setting the hoisting point and controlling the center of gravity position of the tower body. In addition, the longitudinal prestressed temporary cable is set and tensioned and adjusted, which further enhances the longitudinal stability and overall safety of the tower body. In addition, in the process of tower body installation, the method adopts a staged hoisting method, which is convenient for construction operation and can flexibly adjust the construction plan according to actual conditions. Especially during the construction of the main bridge body, effective connection and support between the tower body and the main bridge body are achieved by reserving connection joints and setting internal support brackets, which improves the flexibility and adaptability of construction. In the construction of the tower base foundation, environmental protection measures such as underwater blasting and leveling the rock surface are adopted to reduce the impact of construction on the surrounding environment. At the same time, through factory prefabrication and on-site assembly, the waste and noise pollution generated by on-site construction are reduced, which meets the requirements of environmental protection and sustainable development. This method reduces construction costs and time costs through refined construction management and efficient construction processes. At the same time, the use of factory prefabrication and on-site assembly improves construction efficiency and quality, reduces the cost of later maintenance and repair, and thus achieves good economic benefits. To solve the technical problem of the lack of construction methods in the prior art.

[0006] The present invention provides a method for constructing a special-shaped bridge ring, comprising:

[0007] S100, tower foundation construction; S200, tower base construction; S300, installation of hoisting platform; S400, main tower installation; S500, demolition stage;

[0008] Wherein, step S100 includes: S120, building a drilling platform on the water surface; building a floating bridge, and connecting the floating bridge to the drilling platform;

[0009] The step S200 includes: S210, using an impact drill to construct the bottom of the water; S220, inserting a steel pipe pile into the borehole and pouring concrete into the steel pipe pile; S230, cutting off the upper surface of the drilling platform to reserve a position for lowering the cofferdam; S240, setting an assembly platform; S250, assembling the steel cofferdam on the assembly platform, and dropping the assembled steel cofferdam into the water; S270, pouring underwater bottom sealing concrete in the cofferdam; S290, pouring large-volume concrete for the cap;

[0010] The step S300 includes: S310, installing a hoisting base around the tower base; S320, installing a high-position steel trestle platform; S330, setting a hoisting system on the high-position steel trestle platform;

[0011] Among them, step S400 includes: S420, lifting the tower body P1 through the lifting platform, and connecting the tower body P1 with the concrete in the cofferdam; S430, lifting and installing the tower bodies P2 to P5 in sequence through the lifting platform; S440, waiting for the main bridge body construction to be completed, and connecting the tower body to the main bridge body; S450, lifting and installing the tower bodies P6 to P11 in sequence through the lifting system; S460, setting longitudinal prestressed temporary cables on the tower bodies P10, P11, and P12, and tensioning the longitudinal prestressed temporary cables to adjust the linear shape; S470, installing the tower body P13.

[0012] In the technical solution, through the above content, the construction of the bridge main tower with a special ring shape is realized quickly and efficiently. The construction process ensures overall stability and safety. The construction process is orderly, which is convenient for quality control and safety management. By setting up longitudinal prestressed temporary cables and performing tensioning adjustments, the longitudinal stability and overall safety of the tower body are effectively enhanced. Through precise construction planning and efficient construction management, resource waste and energy consumption are reduced, and the economic and social benefits of construction are improved. The special-shaped ring construction method of the bridge has multiple technical effects such as improved foundation stability, optimized construction efficiency and quality control, enhanced structural safety, improved construction flexibility, and environmental protection and sustainability, providing an efficient, safe and reliable construction solution for bridge construction.

[0013] In some of the embodiments, in step S450, tower bodies P6 to P11 are lifted and installed in sequence by a lifting system; at the same time, an inner support bracket is set up on the main bridge body; when tower bodies P7, P9, P11, and P12 are installed, they are connected to the inner support bracket respectively.

[0014] In some of the embodiments, step S400 includes step S410, prefabricating each tower body in a factory; after prefabrication of each tower body is completed, assembling each tower body inside the factory to check the alignment posture in space during hoisting; after the verification is passed, the tower body is transported to the construction site.

[0015] In some of the embodiments, in step S410, when the tower body is prefabricated, the tower body includes a shell with two ends penetrated, and there are horizontal partitions and vertical plates inside the tower body; wherein, there are two horizontal plates and they are parallel to each other; the two ends of the horizontal plates are connected to the two opposite side walls of the shell; the vertical plates are arranged between the horizontal plates and the corresponding shells, the vertical plates are perpendicular to the horizontal plates, and multiple vertical plates are arranged at intervals along the length direction of the horizontal plates; the horizontal plates and the vertical plates are parallel to the penetration direction of the shell.

[0016] In some embodiments, in step S400, when the tower body is hoisted, four hoisting points are arranged on each tower body; two hoisting points are A and two hoisting points are B;

[0017] The hanging point A is arranged on one side of the shell in the width direction, and the distances between the two hanging points A and one end of the shell in the length direction close to them are the same;

[0018] The hanging point B is arranged at one side in the height direction of the shell; the distance between the hanging point B and the end of the shell in the length direction close to the hanging point B is the same.

[0019] In some of the embodiments, during the process of hoisting the tower body in step S400, it is ensured that the center of gravity of the tower body is located between the four hoisting points; and it is ensured that at least two hoisting points are located above the center of gravity.

[0020] In some embodiments, step S310 includes step S311; step S311 is to insert deep-water steel pipes into the water bottom around the tower base, and when inserting the deep-water steel pipes, select four deep-water steel pipes as a group for arrangement; the four deep-water steel pipes in each group are arranged at the four corners of a rectangle.

[0021] In some of the embodiments, in step S410, when the tower body is prefabricated in a factory, connection joints are reserved on the tower body sections P7, P9, P11, and P12.

[0022] In some of the embodiments, the specific steps of step S470 are: hoisting the tower body P13 through the hoisting system, moving the tower body P13 between the two tower bodies P12, aligning the two ends of the tower body P13 with the top of the corresponding tower body P12, and connecting the tower body P13 and the tower body P12.

[0023] In some embodiments, step S100 includes step S110; step S110 is to level the rock surface by underwater blasting.

[0024] Based on the above technical scheme, in the embodiment of the present invention, the method is divided into detailed steps, such as tower foundation construction, tower construction, hoisting platform installation, main tower installation and dismantling stages, etc., to ensure the systematicness and orderliness of the construction process. In particular, in the process of tower body prefabrication and hoisting, the factory prefabrication and on-site assembly are adopted, which not only improves the construction efficiency, but also ensures the precise alignment and installation quality of the tower body through pre-inspection and acceptance. In the construction of the tower base, the stability and bearing capacity of the tower base foundation are enhanced through the steps of impact drilling construction, steel pipe pile pouring, underwater bottom sealing concrete and large-volume concrete pouring of the pedestal. At the same time, in the process of tower body hoisting, the stability and safety of the hoisting process are ensured by reasonably setting the hoisting points and controlling the center of gravity position of the tower body. In addition, the longitudinal prestressed temporary cable is set and tensioned and adjusted, which further enhances the longitudinal stability and overall safety of the tower body. In addition, in the process of tower body installation, the method adopts a staged hoisting method, which is convenient for construction operation and can flexibly adjust the construction plan according to actual conditions. Especially during the construction of the main bridge body, effective connection and support between the tower body and the main bridge body were achieved by reserving connection joints and setting up internal support brackets, which improved the flexibility and adaptability of the construction. In the construction of the tower base foundation, environmental protection measures such as underwater blasting and leveling the rock surface were adopted to reduce the impact of the construction on the surrounding environment. At the same time, through factory prefabrication and on-site assembly, the waste and noise pollution generated by on-site construction were reduced, which met the requirements of environmental protection and sustainable development. This method reduces construction costs and time costs through refined construction management and efficient construction processes. At the same time, the use of factory prefabrication and on-site assembly improves construction efficiency and quality, reduces the cost of later maintenance and repair, and thus achieves good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 It is a schematic diagram of the overall structure of the special-shaped bridge ring of the present invention;

[0027] Figure 2 It is a schematic diagram of the overall structure of the special-shaped bridge ring of the present invention;

[0028] Figure 3 It is a schematic diagram of the overall structure of the special-shaped bridge ring of the present invention;

[0029] Figure 4 It is a schematic diagram of the overall structure of the special-shaped bridge ring of the present invention;

[0030] Figure 5 It is a schematic structural diagram of the tower body in the special-shaped ring of the bridge of the present invention;

[0031] Figure 6 It is a flow chart of the construction method of the special-shaped bridge ring of the present invention;

[0032] Figure 7 It is a flow chart of the construction method of the special-shaped bridge ring of the present invention;

[0033] Figure 8 It is a flow chart of the construction method of the special-shaped bridge ring of the present invention;

[0034] Fig. 9 It is a flow chart of the construction method of the special-shaped bridge ring of the present invention;

[0035] Fig.10 The present invention is a flow chart of the bridge special-shaped ring construction method.

[0036] In the figure:

[0037] 100, main tower; 200, main bridge body; 300, inner support bracket; 400, tower body. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0040] The terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Please refer to all the accompanying drawings. In an illustrative embodiment of the bridge special-shaped ring construction method of the present invention, the bridge special-shaped ring construction method includes: S100, tower base foundation construction; facilitating the subsequent construction of the tower base.

[0043] In some embodiments, step S100 includes step S110; in step S110, the rock surface is leveled by underwater blasting. The underwater blasting is used to level the bottom of the water, which is convenient for subsequent construction.

[0044] It is worth noting that step S110 is not necessary, and if the water bottom is flat and meets the construction conditions, step S110 can be skipped.

[0045] In some embodiments, step S100 includes step S120; in step S120, a drilling platform is built on the water surface; a floating bridge is built, and the floating bridge is connected to the drilling platform. The drilling platform facilitates the subsequent construction of the tower base, and the floating bridge facilitates manual travel between the shore and the drilling platform, and facilitates the supply of materials to the drilling platform.

[0046] In some embodiments, step S120 further includes locating the positions of two towers to be installed, and installing drilling platforms at the positions of the two towers, that is, installing two drilling platforms, and the position of each drilling platform corresponds to the position of the tower to be constructed later.

[0047] In some embodiments, in step S120, a drilling platform is formed by arranging steel pipe piles and steel sections.

[0048] In some embodiments, step S200 is performed after step S100, wherein S200 is tower base construction; that is, two tower bases are installed in water to facilitate subsequent construction of the main tower 100.

[0049] In some embodiments, step S200 includes step S210; in step S210, an impact drill is used to perform construction on the bottom of the water.

[0050] Furthermore, step S210 is to use a floating crane to hoist a drilling rig to perform drilling operations, and to use an impact drill to construct the bottom of the water to drill a borehole.

[0051] In some embodiments, step S200 includes step S220; in step S220, a steel pipe pile is inserted into the drilled hole, and concrete is poured into the steel pipe pile.

[0052] Furthermore, step S220 specifically includes inserting a steel pipe pile into the borehole to make the steel pipe pile vertical, draining the water in the steel pipe pile, and pouring underwater concrete into the steel pipe pile using a large diameter conduit.

[0053] In some embodiments, step S200 includes step S230; in step S230, the upper surface of the drilling platform is cut off to reserve a position for lowering the cofferdam. This step facilitates the subsequent installation of the cofferdam.

[0054] Further, step S230 specifically includes, after the pouring of step S220 is completed, cutting off the platform steel plate and steel sections within the cofferdam range of the upper surface of the drilling platform, and leaving a 1.5-meter-wide edge of the upper surface of the drilling platform as a walkway for workers to move around.

[0055] In some embodiments, the cofferdam adopts a double-wall steel cofferdam construction process. The dimensions of the pile wall steel cofferdam are 29.5 meters long, 14.1 meters wide, 18.5 meters high, and 1 meter thick.

[0056] In some embodiments, step S200 includes step S240; in step S240, an assembly platform is provided. The assembly platform is used to assemble a temporary steel cofferdam.

[0057] Furthermore, step S240 specifically includes installing an assembly platform on the cut area on the drilling platform, wherein the assembly platform is lower than the upper surface of the drilling platform.

[0058] In some embodiments, step S200 includes step S250; in step S250, the steel cofferdam is assembled on the assembly platform and the assembled steel cofferdam is dropped into the water. Ensure that the steel pipe piles in step S220 are located inside the steel cofferdam.

[0059] Furthermore, in step S250, a large-weight overall lifting and segmented self-floating entry into the water is adopted.

[0060] Furthermore, in step S250, the construction method of filling the steel cofferdam with water is to inject water between two layers of the cofferdam walls.

[0061] Repeat step S250 until all steel cofferdams are set.

[0062] It is worth noting that step S250 may also include connecting the steel cofferdam that falls into the water with the adjacent steel cofferdams, and the connection methods include but are not limited to welding, bundling, etc.

[0063] In some embodiments, step S200 includes step S260; in step S260, after the steel cofferdam is in place, the steel cofferdam is connected to the steel pipe piles to increase the flood resistance.

[0064] Furthermore, in step S260, the connection method between the steel cofferdam and the steel pipe pile includes but is not limited to welding, bundling or connection through other structures. It is worth noting that if in calm waters, step S260 can be omitted.

[0065] In some embodiments, step S200 includes step S270, in which underwater bottom seal concrete is poured in the cofferdam, the water in the cofferdam is drained after the underwater bottom seal concrete solidifies, and the inner supports are installed layer by layer.

[0066] Further, in step S270, the thickness of the underwater bottom seal concrete is 3 meters. In addition, the step of installing the inner support may be to install the inner support on the inner wall of the cofferdam.

[0067] In some embodiments, step S200 includes step S280; in step S280, the steel pipe piles are removed. It is worth noting that step S280 is not necessary. Whether to remove the steel pipe piles can be selected according to actual conditions.

[0068] In some embodiments, step S200 includes step S290; in step S290, pouring mass concrete of the foundation.

[0069] Furthermore, step S290 specifically includes pouring concrete in the cofferdam, and stopping pouring concrete when the poured concrete reaches a preset volume or height.

[0070] In some embodiments, step S300 is performed after step S200; step S300 is to install a hoisting platform. The hoisting platform is installed above the tower base to facilitate the subsequent hoisting of the main tower 100.

[0071] In some embodiments, step S300 includes step S310; step S310 is to install a hoisting base around the tower base.

[0072] In some embodiments, step S310 includes step S311; step S311 is inserting a deep-water steel pipe into the water bottom around the tower base.

[0073] Further, step S311 specifically includes selecting 24 steel pipes with a diameter of 1520 mm and a wall thickness of 10 mm to anchor into the rock. Anchoring into the rock can be understood as inserting into the bottom of the water.

[0074] Furthermore, in step S311, when inserting the deepwater steel pipes, four deepwater steel pipes can be selected as a group for arrangement. The four deepwater steel pipes in each group are arranged at the four corners of a rectangle.

[0075] In some embodiments, step S310 includes step S312; step S312 is to fill the deep-water steel pipe with concrete to form a deep-water steel pipe concrete pile.

[0076] Furthermore, in step S312, the concrete injected into the deep-water steel pipe may be C30 concrete.

[0077] In some embodiments, step S300 includes step S320; step S320 is to install a high-level steel trestle platform. The high-level steel trestle platform is a part of the hoisting platform.

[0078] In some embodiments, step S320 includes step S321, wherein step S321 is to connect columns to the deep-water steel tube concrete piles. Specifically, the number of columns is the same as the number of deep-water steel tube concrete piles and corresponds one to one.

[0079] Furthermore, step S320 may be to lift the column by a tower crane and move it to the deep-water steel tube concrete pile, and connect it manually.

[0080] In some embodiments, step S320 includes step S322; step S322 is connecting the columns through a steel pipe cross frame to improve the strength of the structure.

[0081] In some embodiments, the columns are made of steel pipes with a diameter of 1520 mm and a wall thickness of 10 mm.

[0082] In the above content, it can be considered that after the installation of each column, a high-level steel trestle platform is formed.

[0083] In some embodiments, after the integrally installed high-position steel trestle platform is installed, its height above the water surface is 102.5 meters, its length is 89 meters, and its width is 51 meters.

[0084] In some embodiments, step S300 includes step S330; step S330 is to set up a hoisting system on the high-position steel trestle platform.

[0085] In some embodiments, step S330 includes step S331; step S331 is to install a first weight distribution beam on the top of the high-level steel trestle platform. Both ends of the first weight distribution beam are respectively placed above the corresponding columns. The first weight distribution beams are parallel to each other.

[0086] The first weight distribution beam is used to provide a support for a structure that needs to be installed subsequently, and the first weight distribution beam is used to distribute the weight of the structure that is installed subsequently.

[0087] Further, in step S331, the first weight distribution beam uses 4I56A I-beam.

[0088] Furthermore, in step S331, the first weight distribution beam is hoisted by a tower crane and is disposed above a corresponding column.

[0089] In some embodiments, step S330 includes step S332; step S332 is to install a longitudinal beam on the first weight distribution beam.

[0090] Further, in step S332, a steel truss is hoisted by a tower crane and arranged above the first weight distribution beam, with the length direction of the steel truss being arranged horizontally and the width direction being arranged vertically. The next steel truss is hoisted and arranged adjacent to the previous steel truss. This is done until all the steel trusses are installed. It is ensured that the steel trusses are parallel to each other.

[0091] Furthermore, in step S332, the longitudinal beam adopts a steel truss.

[0092] In some embodiments, step S330 includes step S333; step S333 is to arrange a plurality of second weight distribution beams parallel to each other at intervals along the length direction of the longitudinal beam, and distribute the weight of the structure to be installed later through the second weight distribution beams to avoid structural damage caused by weight concentration.

[0093] Furthermore, in step S333, the second weight distribution beam is hoisted onto the longitudinal beam by a tower crane, and the second weight distribution beam is moved to a corresponding position manually or by a tower crane.

[0094] In some embodiments, step S330 includes step S334, wherein step S334 is to install a first slideway on the second weight distribution beam. The length direction of the first slideway is the same as the spacing direction of each second weight distribution beam.

[0095] Furthermore, the specific steps of step S334 are: lifting the first slideway by a tower crane, setting the first slideway at a designated position, and then manually fixing the first slideway.

[0096] In some embodiments, step S330 includes step S335; step S335 is to install a crossbeam on the first slide, and the length direction of the crossbeam is horizontally arranged and perpendicular to the longitudinal beam.

[0097] Furthermore, the specific steps of step S335 are: lifting the cross beam, placing the two ends of the cross beam on the first slideways of the two longitudinal beams respectively, and slidingly connecting the cross beam to the first slideway by manual alignment.

[0098] In some embodiments, step S330 includes step S336; step S336 is to set a second slide above the beam, and the second slide has the same length direction as the beam.

[0099] Furthermore, the specific steps of step S336 are: lifting the second slideway by a tower crane, setting the second slideway at a designated position, and then manually fixing the second slideway.

[0100] In some embodiments, step S330 includes step S337; step S337 is installing a lifting system on the second slide.

[0101] Furthermore, the specific steps of step S337 are: lifting the lifting system onto the second slideway by using a tower crane, and slidingly connecting the lifting system to the second slideway by manual alignment.

[0102] In some embodiments, the lifting system includes a steel strand pulling system and steel strands.

[0103] In some embodiments, step S400 is performed after step S300; step S400 is for installing the main tower 100.

[0104] In some embodiments, the main tower 100 is formed by splicing multiple tower bodies 400. The tower bodies 400 are numbered P1 to P12 from bottom to top. It is worth noting that because the main tower 100 has two footholds, there are two tower bodies 400 from P1 to P12. The main tower 100 also includes a tower body 400P13, which is the topmost tower body 400 of the main tower 100. There is only one tower body 400P13, which is used to connect the two tower bodies 400P12.

[0105] In some embodiments, step S400 includes step S410; in step S410, each tower body 400 is prefabricated in a factory; after the prefabrication of each tower body 400 is completed, each tower body 400 is assembled inside the factory to check the alignment posture in space during the hoisting. After the verification is passed, the tower body 400 is transported to the construction site.

[0106] In some embodiments, in step S410, when the tower body 400 is prefabricated in a factory, connection joints are reserved on the tower body 400 sections P7, P9, P11, and P12.

[0107] In some embodiments, in step S410, when the tower body 400 is prefabricated, the tower body 400 includes a shell with two ends connected, and a horizontal partition and a vertical plate are arranged inside the tower body 400. Among them, there are two horizontal plates and they are parallel to each other. The two ends of the horizontal plate are connected to the two opposite side walls of the shell. The vertical plate is arranged between the horizontal plate and the corresponding shell, the vertical plate is perpendicular to the horizontal plate, and a plurality of vertical plates are arranged at intervals along the length direction of the horizontal plate. The horizontal plate and the vertical plate are parallel to the through direction of the shell.

[0108] Furthermore, in the tower body 400, the shell is arranged in a rectangular shape, and the height direction of the shell is the through direction of the shell. The horizontal plate is parallel to the length direction of the shell, and the vertical plate is parallel to the width direction of the shell. It is worth noting that because the main tower 100 in the present application is a special-shaped ring, the rectangular shape of the shell in the tower body 400 will produce a certain degree of twisting.

[0109] In some embodiments, in step S410, the tower body 400 is transported to the construction site by a transport ship.

[0110] In some embodiments, step S400 includes step S420; in step S420, the tower body 400P1 is hoisted by a hoisting platform, and the tower body 400P1 is connected to the concrete in the cofferdam.

[0111] It is worth noting that the tower body 400P1 is connected to the concrete poured in step S290.

[0112] Furthermore, in step S420, the tower body 400P1 is connected to the concrete by welding and pouring the concrete, specifically, the tower body 400P1 is welded to the structure in the concrete.

[0113] In some embodiments, step S400 includes step S430; in step S430, after waiting for the concrete in step S420 to solidify to meet the design requirements, the tower bodies 400P2 to P5 are hoisted and installed in sequence through the hoisting platform.

[0114] In some embodiments, step S430 includes step S431; in step S431, the tower body 400P2 is hoisted by the hoisting system, the tower body 400P2 is moved above the corresponding tower body 400P1, the tower body 400P2 is aligned with the tower body 400P1, and the tower body 400P2 is connected with the tower body 400P1.

[0115] Further, in step S431, the tower body 400P2 is connected to the tower body 400P1 by welding, plug connection, or anchoring connection.

[0116] In some embodiments, step S430 includes step S432; in step S432, the tower body 400P3 is hoisted by the hoisting system, the tower body 400P3 is moved above the corresponding tower body 400P2, the tower body 400P3 is aligned with the tower body 400P2, and the tower body 400P3 is connected with the tower body 400P2.

[0117] Further, in step S432, the tower body 400P3 and the tower body 400P2 are connected by welding, plug connection, or anchoring connection.

[0118] In some embodiments, step S430 includes step S433; in step S433, the tower body 400P4 is hoisted by the hoisting system, the tower body 400P4 is moved above the corresponding tower body 400P3, the tower body 400P4 is aligned with the tower body 400P3, and the tower body 400P4 is connected with the tower body 400P3.

[0119] Further, in step S433, the tower body 400P4 and the tower body 400P3 are connected by welding, plug connection, or anchoring connection.

[0120] In some embodiments, step S430 includes step S434; in step S434, the hoisting tower body 400P5 is hoisted by the hoisting system, the tower body 400P5 is moved above the corresponding tower body 400P4, the tower body 400P5 is aligned with the tower body 400P4, and the tower body 400P5 is connected with the tower body 400P4.

[0121] Further, in step S434, the tower body 400P5 and the tower body 400P4 are connected by welding, plug connection, or anchoring connection.

[0122] In some embodiments, step S400 includes step S440 ; in step S440 , the construction of the main bridge body 200 is waited to be completed, and the tower body 400 is connected to the main bridge body 200 .

[0123] In the above steps, the tower bodies 400P1 to 400P5 can remain stable by virtue of their own structural strength. In step S440, the tower body 400 is connected to the steel box girder of the main bridge body 200, thereby improving the stability of the installed tower body 400 and providing support for the subsequent installation of the tower body 400.

[0124] In some embodiments, the main bridge body 200 is composed of a plurality of steel box girders. In step S440, the tower body 400P5 is connected to the steel box girders of the main bridge body 200.

[0125] In some embodiments, step S400 includes step S450; in step S450, the tower bodies 400P6 to P11 are hoisted and installed in sequence by the hoisting system. At the same time, the inner support bracket 300 is set up on the main bridge body 200; when the tower bodies 400P7, P9, P11, and P12 are installed, they are connected to the inner support bracket 300.

[0126] Through data simulation and three-dimensional simulation calculation, it is concluded that the internal support reinforcement on the four sections of the tower body 400, P7, P9, P11, and P12, has the highest overall stability. The connection strength and stability of the main tower 100 during the construction process are improved.

[0127] In some embodiments, the inner support bracket 300 includes vertical steel pipe columns and horizontal crossbeams.

[0128] In some embodiments, step S450 includes step S451; in step S451, the hoisting tower body 400P6 is hoisted by the hoisting system, the tower body 400P6 is moved above the corresponding tower body 400P5, the tower body 400P6 is aligned with the tower body 400P5, and the tower body 400P6 is connected with the tower body 400P5.

[0129] Further, in step S450, the tower body 400P6 and the tower body 400P5 are connected by welding, plug connection, or anchoring connection.

[0130] In some embodiments, step S450 includes step S452; in step S452, the tower body 400P7 is hoisted by the hoisting system, the tower body 400P7 is moved above the corresponding tower body 400P6, the tower body 400P7 is aligned with the tower body 400P6, and the tower body 400P7 is connected with the tower body 400P6.

[0131] Further, in step S452, the tower body 400P7 and the tower body 400P6 are connected by welding, plug-in connection, or connection by a connection joint reserved for anchor connection.

[0132] In some embodiments, step S452 further includes connecting the corresponding horizontal cross frame on the inner support bracket 300 to the connection joint reserved on the tower body 400P7. This step can be performed before the tower body 400P7 is connected to the tower body 400P6, or after the tower body 400P7 is connected to the tower body 400P6.

[0133] In some embodiments, step S450 includes step S453; in step S453, the tower body 400P8 is hoisted by the hoisting system, the tower body 400P8 is moved above the corresponding tower body 400P7, the tower body 400P8 is aligned with the tower body 400P7, and the tower body 400P8 is connected with the tower body 400P7.

[0134] Further, in step S453, the tower body 400P8 and the tower body 400P7 are connected by welding, plug connection, or anchoring connection.

[0135] In some embodiments, step S450 includes step S454; in step S454, the tower body 400P9 is hoisted by the hoisting system, the tower body 400P9 is moved above the corresponding tower body 400P8, the tower body 400P9 is aligned with the tower body 400P8, and the tower body 400P9 is connected with the tower body 400P8.

[0136] Further, in step S454, the tower body 400P9 and the tower body 400P8 are connected by welding, plug-in connection, or connection joints reserved for anchor connection.

[0137] In some embodiments, step S454 further includes connecting the corresponding horizontal cross frame on the inner support bracket 300 to the connection joint reserved on the tower body 400P9. This step can be performed before the tower body 400P9 is connected to the tower body 400P8, or after the tower body 400P9 is connected to the tower body 400P8.

[0138] In some embodiments, step S450 includes step S455; in step S455, the hoisting tower body 400P10 is hoisted by the hoisting system, the tower body 400P10 is moved above the corresponding tower body 400P9, the tower body 400P10 is aligned with the tower body 400P9, and the tower body 400P10 is connected with the tower body 400P9.

[0139] Further, in step S455, the tower body 400P10 and the tower body 400P9 are connected by welding, plug connection, or anchoring connection.

[0140] In some embodiments, step S450 includes step S456; in step S456, the hoisting tower body 400P11 is hoisted by the hoisting system, the tower body 400P11 is moved above the corresponding tower body 400P10, the tower body 400P11 is aligned with the tower body 400P10, and the tower body 400P11 is connected with the tower body 400P10.

[0141] Further, in step S456, the tower body 400P11 and the tower body 400P10 are connected by welding, plug-in connection, or connection joints reserved for anchor connection.

[0142] In some embodiments, step S456 further includes connecting the corresponding horizontal cross frame on the inner support bracket 300 to the connection joint reserved on the tower body 400P11. This step can be performed before the tower body 400P11 is connected to the tower body 400P10, or after the tower body 400P11 is connected to the tower body 400P10.

[0143] In some embodiments, step S450 includes step S457; in step S457, the hoisting tower body 400P12 is hoisted by the hoisting system, the tower body 400P12 is moved above the corresponding tower body 400P11, the tower body 400P12 is aligned with the tower body 400P11, and the tower body 400P12 and the tower body 400P11 are connected.

[0144] Further, in step S457, the tower body 400P12 and the tower body 400P11 are connected by welding, plug-in connection, or connection joints reserved for anchor connection.

[0145] In some embodiments, step S457 further includes connecting the corresponding horizontal cross frame on the inner support bracket 300 to the connection joint reserved on the tower body 400P12. This step can be performed before the tower body 400P12 is connected to the tower body 400P11, or after the tower body 400P12 is connected to the tower body 400P11.

[0146] In some embodiments, step S400 includes step S460; in step S460, longitudinal prestressed temporary cables are arranged on the tower bodies 400P10, P11, and P12, and the longitudinal prestressed temporary cables are tensioned and adjusted in line shape by using jacks.

[0147] In some embodiments, one end of the longitudinal prestressed temporary cable connected to the main bridge body 200 is a fixed end, and one end connected to the tower body 400 is a tensioning end.

[0148] In some embodiments, step S400 includes step S470; step S470 is to install the tower body 400P13. Specifically, the tower body 400P13 is hoisted by the hoisting system, the tower body 400P13 is moved between the two tower bodies 400P12, the two ends of the tower body 400P13 are respectively aligned with the top of the corresponding tower body 400P12, and the tower body 400P13 is connected with the tower body 400P12.

[0149] Further, in step S470, the tower body 400P13 and the tower body 400P12 are connected by welding, plug-in connection, or connection joints reserved for anchor connection.

[0150] In step S400, when the tower body 400 is hoisted, four hoisting points are set on each tower body 400. Two hoisting points are A and two hoisting points are B.

[0151] The hanging point A is arranged at one side in the width direction of the shell, and the distances between the two hanging points A and one end of the shell in the length direction close thereto are the same.

[0152] The suspension point B is arranged at one side of the shell in the height direction and is at the same distance from the suspension point B as the end of the shell in the length direction close to it.

[0153] Furthermore, the hanging point B is arranged at the junction of the horizontal plate and the vertical plate in the tower body 400 .

[0154] In another embodiment, the hanging point B is disposed at the junction of the vertical plate and the shell in the tower body 400 .

[0155] In some embodiments, during the hoisting process of the tower body 400 in step S400, it is ensured that the center of gravity of the tower body 400 is located between the four hoisting points.

[0156] In some embodiments, during the process of hoisting the tower body 400 in step S400, it is ensured that at least two hoisting points are located above the center of gravity. The posture of the tower body 400 is adjusted by tensioning the steel strands on each hoisting point.

[0157] A cross lug is provided at the lifting point. The cross lug is aligned by rotating two mutually perpendicular pins to ensure the stability of the tower body 400 during lifting. The cross lug can be understood as a universal shaft.

[0158] In some embodiments, step S500 is performed after step S400; step S500 is a dismantling stage.

[0159] In some embodiments, step S500 specifically includes dismantling the lifting platform from top to bottom.

[0160] Furthermore, in step S500, the demolition is performed by a tower crane, and the weight of each demolition does not exceed the maximum weight that the tower crane can bear.

[0161] Through the description of multiple embodiments of the bridge special-shaped ring construction method of the present invention, it can be seen that the bridge special-shaped ring construction method of the present invention has at least one or more of the following advantages:

[0162] The method ensures the systematicness and orderliness of the construction process through detailed steps, such as tower foundation construction, tower construction, hoisting platform installation, main tower 100 installation and dismantling stages. In particular, in the process of prefabrication and hoisting of the tower body 400, the factory prefabrication and on-site assembly are adopted, which not only improves the construction efficiency, but also ensures the precise alignment and installation quality of the tower body 400 through pre-inspection and acceptance. In the construction of the tower base, the stability and bearing capacity of the tower base foundation are enhanced through the steps of impact drilling construction, steel pipe pile pouring, underwater bottom sealing concrete and large-volume concrete pouring of the cap. At the same time, in the process of hoisting the tower body 400, the stability and safety of the hoisting process are ensured by reasonably setting the hoisting points and controlling the center of gravity position of the tower body 400. In addition, the longitudinal prestressed temporary cable is set and tensioned and adjusted, which further enhances the longitudinal stability and overall safety of the tower body 400. In addition, in the process of installing the tower body 400, the method adopts a staged hoisting method, which is convenient for construction operations and can flexibly adjust the construction plan according to actual conditions. Especially during the construction of the main bridge body 200, by reserving connection joints and setting up internal support brackets 300 and other measures, the tower body 400 and the main bridge body 200 are effectively connected and supported, which improves the flexibility and adaptability of the construction. In the construction of the tower base foundation, environmental protection measures such as underwater blasting and leveling the rock surface are adopted to reduce the impact of the construction on the surrounding environment. At the same time, through the method of factory prefabrication and on-site assembly, the waste and noise pollution generated by on-site construction are reduced, which meets the requirements of environmental protection and sustainable development. This method reduces construction costs and time costs through refined construction management and efficient construction processes. At the same time, the method of factory prefabrication and on-site assembly improves construction efficiency and quality, reduces the cost of later maintenance and repair, and thus achieves good economic benefits.

[0163] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0164] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the present invention, which should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A method for constructing a special-shaped bridge ring, characterized in that: include: S100, tower foundation construction; S200, tower base construction; S300, installation of hoisting platform; S400, main tower installation; S500, dismantling stage; Wherein, step S100 includes: S120, building a drilling platform on the water surface; building a floating bridge, and connecting the floating bridge to the drilling platform; The step S200 includes: S210, using an impact drill to construct the bottom of the water; S220, inserting a steel pipe pile into the borehole and pouring concrete into the steel pipe pile; S230, cutting off the upper surface of the drilling platform to reserve a position for lowering the cofferdam; S240, setting an assembly platform; S250, assembling the steel cofferdam on the assembly platform, and dropping the assembled steel cofferdam into the water; S270, pouring underwater bottom sealing concrete in the cofferdam; S290, pouring large-volume concrete for the cap; The step S300 includes: S310, installing a hoisting base around the tower base; S320, installing a high-position steel trestle platform; S330, setting a hoisting system on the high-position steel trestle platform; Among them, step S400 includes: S420, lifting the tower body P1 through the lifting platform, and connecting the tower body P1 with the concrete in the cofferdam; S430, lifting and installing the tower bodies P2 to P5 in sequence through the lifting platform; S440, waiting for the main bridge body construction to be completed, and connecting the tower body to the main bridge body; S450, lifting and installing the tower bodies P6 to P11 in sequence through the lifting system; S460, setting longitudinal prestressed temporary cables on the tower bodies P10, P11, and P12, and tensioning the longitudinal prestressed temporary cables to adjust the linear shape; S470, installing the tower body P13.

2. The method for constructing a special-shaped bridge ring according to claim 1, characterized in that: In step S450, the tower bodies P6 to P11 are lifted and installed in sequence by the lifting system; at the same time, inner support brackets are set up on the main bridge body; when installing the tower bodies P7, P9, P11, and P12, they are connected to the inner support brackets.

3. The method for constructing a special-shaped bridge ring according to claim 1, characterized in that: Step S400 includes step S410, prefabricating each tower body in a factory; after prefabrication of each tower body, assembling each tower body inside the factory to check the alignment posture in space during hoisting; after the check is passed, transporting the tower body to the construction site.

4. The method for constructing a special-shaped bridge ring according to claim 3, characterized in that: In step S410, when the tower body is prefabricated, the tower body includes a shell with two ends through, and there are horizontal partitions and vertical plates inside the tower body; wherein, there are two horizontal plates and they are parallel to each other; the two ends of the horizontal plates are connected to the two opposite side walls of the shell; the vertical plates are arranged between the horizontal plates and the corresponding shell, the vertical plates are perpendicular to the horizontal plates, and multiple vertical plates are arranged at intervals along the length direction of the horizontal plates; the horizontal plates and the vertical plates are parallel to the through direction of the shell.

5. The method for constructing a special-shaped bridge ring according to claim 4, characterized in that: In step S400, when the tower body is hoisted, four hoisting points are set on each tower body; two hoisting points are A and two hoisting points are B; The hanging point A is arranged on one side of the shell in the width direction, and the distances between the two hanging points A and one end of the shell in the length direction close to them are the same; The hanging point B is arranged at one side in the height direction of the shell; the distance between the hanging point B and the end of the shell in the length direction close to the hanging point B is the same.

6. The method for constructing a special-shaped bridge ring according to claim 5, characterized in that: During the process of hoisting the tower body in step S400, ensure that the center of gravity of the tower body is located between the four hoisting points; and ensure that at least two hoisting points are located above the center of gravity.

7. The method for constructing a special-shaped bridge ring according to claim 1, characterized in that: Step S310 includes step S311; step S311 is to insert deep-water steel pipes into the water bottom around the tower base, and when inserting the deep-water steel pipes, select four deep-water steel pipes as a group for arrangement; the four deep-water steel pipes in each group are arranged at the four corners of a rectangle.

8. The method for constructing a special-shaped bridge ring according to claim 1, characterized in that: In step S410, when the tower body is prefabricated in the factory, connection joints are reserved on the tower body sections P7, P9, P11, and P12.

9. The method for constructing a special-shaped bridge ring according to claim 1, characterized in that: The specific steps of step S470 are: hoisting the tower body P13 through the hoisting system, moving the tower body P13 between the two tower bodies P12, aligning the two ends of the tower body P13 with the top of the corresponding tower body P12, and connecting the tower body P13 and the tower body P12.

10. The method for constructing a special-shaped bridge ring according to claim 1, characterized in that: Step S100 includes step S110; step S110 is to level the rock surface by underwater blasting.

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