Bridge main pier construction method

Abstract

The invention relates to a bridge main pier construction method, and belongs to the field of bridge construction.The bridge main pier construction method comprises the steps that S100, a main supporting frame is installed; a main supporting frame is installed on the offshore bearing platform; s200, a side pier bottom formwork is installed; s300, a side pier is poured, specifically, the side pier is poured and formed on the side pier bottom formwork; s400, an upper box girder support structure and a box girder bottom plate are installed; s500, top plate concrete is constructed, and prestress tensioning is completed; s600, a hanging basket structure is installed; and S700, connection of the bridge body and the side piers is completed. Wherein S100 comprises the steps of S110, inserting a vertical steel frame and S120, connecting a transverse steel frame; wherein S100 comprises the following steps: S111, mounting a third row of steel frames; s112, a second row of steel frames and a fourth row of steel frames are installed; and S113, the first row of steel frames and the fifth row of steel frames are constructed. The step S200 comprises the steps that S210, a side pier bottom formwork is connected with a bearing platform; s220, the steel cable penetrates through the main supporting frame; and the two ends of the steel cable are connected to the two side pier bottom formworks correspondingly.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge construction, and in particular relates to a method for constructing a main pier of a bridge. Background Art

[0002] A bridge is a special man-made structure with load-bearing capacity used for railways, roads, channels, pipelines, etc. to cross rivers, valleys or other transportation lines.

[0003] In a bridge, the main pier is the supporting structure of the bridge. Some of the main piers are in a "Y" shape. The design of the Y-shaped main pier cleverly utilizes the stability principle of the triangle. It is closely connected to the foundation pier body through two inclined support arms to form an indestructible triangular frame. This design enables the bridge to more effectively resist natural forces such as wind pressure, water flow impact and earthquakes from all directions, ensuring the long-term safety and stability of the bridge. In addition, the main pier of this shape has a novel and beautiful appearance.

[0004] However, in the prior art, when constructing the Y-shaped main pier, it is difficult to eliminate the errors in the construction process, the adjustment is complicated, and the construction cost is high, so a method for constructing the main pier of a bridge is urgently needed. Summary of the invention

[0005] In view of the shortcomings existing in the related art, the present invention provides a method for constructing the main pier of a bridge, in which both ends of the steel cable are connected to the two side pier bottom templates. The weight of the side pier bottom template is transmitted from top to bottom to the main support frame through the steel cable. The advantage of the main support frame being able to withstand stronger forces in the vertical direction is utilized, and the main support frame is not easily damaged. In addition, when the angle of the side pier bottom template is incorrect, the angle of the side pier bottom template can be adjusted by adjusting the position of each steel cable. This solves the technical problems of complex adjustment and high construction cost existing in the prior art.

[0006] The present invention provides a method for constructing a main bridge pier, comprising:

[0007] S100, install the main support frame: install the main support frame on the offshore platform;

[0008] S110, insert vertical steel frame;

[0009] S111, install the third row of steel frames;

[0010] S112, install the second and fourth row steel frames;

[0011] S113, construction of the first and fifth rows of steel frames;

[0012] S120, connecting the transverse steel frame;

[0013] S200, install the side pier bottom formwork:

[0014] S210, connecting the side pier bottom formwork to the cap;

[0015] S220, pass the steel cable through the main support frame; connect the two ends of the steel cable to the bottom formworks of the two side piers respectively;

[0016] S300, casting side piers: casting and forming side piers on the side pier bottom formwork;

[0017] S400, install the upper box beam support structure and the box beam bottom plate;

[0018] S500, construct top slab concrete and complete prestressing;

[0019] S600, install the hanging basket structure;

[0020] S700. Complete the connection between the bridge body and the side piers.

[0021] In some of the embodiments, the step before step S220 also includes estimating the distance the steel cable is extended after being pulled, and selecting a steel cable of appropriate length according to construction requirements.

[0022] In some of the embodiments, the specific step of S220 includes step S221. The specific content of step S221 is to select two long, two medium and two short steel cables according to the construction requirements; a total of six steel cables.

[0023] In some of the embodiments, step S221 is followed by step S222, and the specific content of step S222 is to manually connect the ends of the two long steel cables with the top ends on both sides of the width direction of the pier bottom formwork on one side, and then pass the two long steel cables through all the top transverse steel frames in the main support frame, and then connect the ends of the long steel cables with the top ends on both sides of the width direction of the corresponding side pier bottom formwork; ensure that the two ends of the long steel cables are the same height.

[0024] In some of the embodiments, step S222 is followed by step S223, and the specific content of step S223 is to manually connect the ends of the two middle steel cables with the middle parts on both sides of the width direction of the pier bottom formwork on one side, and then pass the two middle steel cables through all the transverse steel frames in the middle of the main support frame, and then connect the ends of the middle steel cables with the middle ends on both sides of the width direction of the corresponding side pier bottom formwork; ensure that the two ends of the middle steel cables are the same height.

[0025] In some of the embodiments, step S223 is followed by step S224, and the specific content of step S224 is to manually connect the ends of the two short steel cables with the lower halves on both sides of the width direction of the pier bottom formwork on one side, and then pass the two middle steel cables through all the transverse steel frames at the bottom of the main support frame, and then connect the ends of the short steel cables with the lower halves on both sides of the width direction of the corresponding side pier bottom formwork; ensure that the two ends of the short steel cables are the same height.

[0026] In some of the embodiments, step S200 includes step S230; step S230 is to fine-tune the position of the side pier bottom formwork.

[0027] In some of the embodiments, the specific steps of step S300 are: lifting the mold by a lifting device on a construction ship and transporting it to the bottom formwork of the side pier; manually fixing the mold on the bottom formwork of the side pier, lifting the side formwork steel cage by the lifting device, and placing the side formwork steel cage in the mold; pouring concrete in the mold by a pouring device, and waiting for the concrete to solidify to form a side pier.

[0028] In some embodiments, step S400 includes step S410, S420 and step S430;

[0029] Step S410 is to lay a beam frame on the top of the main support frame;

[0030] Step S420 is to install the cup-hook type scaffolding and the box beam mold on the beam frame;

[0031] Step S430 is to cast the box girder.

[0032] In some of the embodiments, the specific steps of S700 are: manually constructing the bridge body on the top plate through a hanging basket, and gradually constructing horizontally in the direction of the side piers until the side piers are connected to the bridge body.

[0033] Based on the above technical solution, in the embodiment of the present invention, both ends of the steel cable are connected to the two side pier bottom templates. The weight of the side pier bottom template is transmitted from top to bottom to the main support frame through the steel cable. The advantage of the main support frame being able to withstand a stronger force in the vertical direction is utilized, and the main support frame is not easily damaged. In addition, when the angle of the side pier bottom template is incorrect, the angle of the side pier bottom template can be adjusted by adjusting the position of each steel cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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:

[0035] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the bridge main pier construction method of the present invention;

[0036] Figure 2 A front view of an embodiment of a method for constructing a main bridge pier according to the present invention;

[0037] Figure 3 A schematic structural diagram of an adjusting device in one embodiment of a method for constructing a main bridge pier according to the present invention;

[0038] Figure 4It is a schematic structural diagram of a method for constructing a main bridge pier according to an embodiment of the present invention after pouring a box girder;

[0039] Figure 5 This is a schematic structural diagram of an embodiment of a bridge main pier construction method according to the present invention after step S700;

[0040] Figure 6 This is a front view after step S700 of an embodiment of the bridge main pier construction method of the present invention;

[0041] Figure 7 This is one of the work flow charts of an embodiment of the bridge main pier construction method of the present invention;

[0042] Figure 8 This is the second working flow chart of an embodiment of the bridge main pier construction method of the present invention;

[0043] Fig. 9 This is the third workflow diagram of an embodiment of the bridge main pier construction method of the present invention.

[0044] In the figure:

[0045] 100, pedestal; 200, main support frame; 202, vertical steel frame; 203, horizontal steel frame; 300, side pier bottom formwork; 400, steel cable; 500, nut; 600, screw; 700, cup-hook scaffolding; 800, steel top plate; 900, hanging basket structure. DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] Block 0 is the first unit to be cast when a large-span integral continuous beam bridge is constructed in sections. The effect of the construction of block 0 in this application is particularly excellent. That is, the solution of this application is best for the first main pier to be built. The method of this application also has a better effect when other subsequent main piers are constructed.

[0051] Please refer to all the accompanying drawings, in an illustrative embodiment of the bridge main pier construction method of the present invention,

[0052] In the present application, the main pier of the bridge is constructed on the offshore cap 100. The present application does not involve the construction process of the offshore cap 100, so it will not be described here.

[0053] The base 100 may be prefabricated with steel legs or other structures such as sockets to facilitate the construction and connection of subsequent structures.

[0054] In some embodiments, the bridge main pier construction method includes S000 preparation work.

[0055] In some embodiments, the specific steps of step S000 are to place the vertical steel frame 202, the horizontal steel frame 203, the steel cable 400, concrete, the formwork and other structures on the construction ship, and drive the construction ship to the foundation 100.

[0056] In some embodiments, the main pier construction method of the bridge includes S100. S100 is to install the main support frame 200. Specifically, the main support frame 200 is installed on the offshore platform 100.

[0057] In some embodiments, step S100 includes step S110; step S110 is inserting the vertical steel frame 202. Five rows of vertical steel frames 202 are installed on the base 100, and the five rows of steel frames are arranged in a fan shape, and the middle row of vertical steel frames 202 is perpendicular to the horizontal plane.

[0058] Further, step S110 includes step S111, which is to install the third row of steel frames, that is, to construct vertical steel frames 202 perpendicular to the horizontal plane. One of the vertical steel frames 202 is lifted by the lifting equipment on the construction ship, and the vertical steel frame 202 is vertically moved to the top of the cap 100. The construction personnel go from the construction ship to the cap 100, and the construction personnel assist in moving the vertical steel frame 202 to the preset construction position. The construction personnel weld the bottom end of the vertical steel frame 202 to the steel foot on the cap 100.

[0059] Repeat the above step S111 until the vertical steel frames 202 of the row are installed.

[0060] It is worth noting that in step S111, when installing the next vertical steel frame 202, a gap that meets the construction conditions is maintained between the next vertical steel frame 202 and the previous vertical steel frame 202.

[0061] Furthermore, during or after step S111, the angles of the row of vertical steel frames 202 are checked by a total station to see if they are in compliance. If not, the corresponding vertical steel frames 202 are straightened by a lifting device.

[0062] In some embodiments, step S110 includes step S112. Step S112 is after step S111.

[0063] In some embodiments, the specific steps of step S112 are to install the second row and the fourth row of steel frames.

[0064] The vertical steel frame 202 is lifted by the lifting equipment on the construction ship, and the vertical steel frame 202 is vertically moved to the top of the cap 100. The construction personnel go from the construction ship to the cap 100, and the construction personnel assist in moving the vertical steel frame 202 to the preset construction position. The construction personnel weld the bottom end of the vertical steel frame 202 to the steel foot on the cap 100.

[0065] Furthermore, during or after step S112, the angles of the row of vertical steel frames 202 are checked by a total station to see if they are in compliance. If not, the corresponding vertical steel frames 202 are straightened by a lifting device.

[0066] In some embodiments, step S110 includes step S113. Step S113 is performed after step S112. Step S113 is to construct the first row and the fifth row of steel frames.

[0067] The vertical steel frame 202 is lifted by the lifting equipment on the construction ship, and the vertical steel frame 202 is vertically moved to the top of the cap 100. The construction personnel go from the construction ship to the cap 100, and the construction personnel assist in moving the vertical steel frame 202 to the preset construction position. The construction personnel weld the bottom end of the vertical steel frame 202 to the steel foot on the cap 100.

[0068] Furthermore, during or after step S113, the angles of the row of vertical steel frames 202 are checked by a total station to see if they are in compliance. If not, the corresponding vertical steel frames 202 are straightened by a lifting device.

[0069] In another embodiment, in the whole process of step S110, i.e., including steps S111, S112 and S113, the connection mode between the vertical steel frame 202 and the cap 100 can be plug-in. That is, the cap 100 has a socket, and after the construction personnel assist in moving the vertical steel frame 202 to the preset construction position, the lifting equipment lowers the vertical steel frame 202, and the construction personnel assist in aligning the vertical steel frame 202 with the corresponding socket and inserting it into the socket.

[0070] In some embodiments, step S100 includes step S120 ; step S120 is connecting the transverse steel frame 203 .

[0071] In some embodiments, the specific steps of step S120 are: the lifting device lifts the horizontal steel frame 203, and the construction personnel assist in moving the horizontal steel frame 203 to the preset construction position. The construction personnel weld the horizontal steel frame 203 to the corresponding vertical steel frames 202 to achieve the connection between the horizontal steel frame 203 and the vertical steel frame 202.

[0072] The above step S120 is repeated until at least one horizontal steel frame 203 is connected between any adjacent vertical steel frames 202 .

[0073] All vertical steel frames 202 and transverse steel frames 203 on the support platform 100 are connected to form a main support frame 200.

[0074] In some embodiments, step S100 is followed by step S200. Step S200 is to install the side pier bottom formwork 300. The side pier bottom formworks 300 on both sides are respectively installed on both sides of the main support frame 200; the bottom of the side pier bottom formworks 300 is connected to the offshore platform 100; and the tops of the two side pier bottom formworks 300 are connected by steel cables 400.

[0075] In some embodiments, step S200 includes step S210 . Step S210 connects the side pier bottom formwork 300 with the cap 100 .

[0076] Furthermore, the specific steps of step S210 are: lifting the side pier bottom template 300 by the lifting equipment on the construction ship. The construction personnel assist in moving the side pier bottom template 300 to the preset construction position. The construction personnel weld the bottom end of the side pier bottom template 300 to the steel foot on the cap 100.

[0077] In some embodiments, step S200 includes step S220. Step S220 is to fix the top end of the side pier bottom formwork 300.

[0078] In some embodiments, the specific step of S220 is to pass the steel cable 400 through the main support frame 200. Connect both ends of the steel cable 400 to the two side pier bottom templates 300 respectively.

[0079] It is worth noting that step S210 may be performed twice continuously or simultaneously, and step S220 may be performed after the bottom ends of the side pier bottom templates 300 are connected to the cap 100. Step S210 and step S220 may also be performed simultaneously.

[0080] In some embodiments, the step before step S220 also includes estimating the distance that the steel cable 400 is extended after being pulled, and selecting a steel cable 400 of a suitable length according to construction requirements.

[0081] In some embodiments, the specific steps of step S220 include step S221, and the specific content of step S221 is to select two long, two medium and two short steel cables 400 according to the construction requirements, for a total of six steel cables 400.

[0082] In some embodiments, the specific steps of step S220 include step S222, which is located after step S221. The specific content of step S222 is to manually connect the ends of the two long steel cables 400 to the tops of the two sides of the width direction of the pier bottom formwork 300 on one side, and then connect the ends of the long steel cables 400 to the tops of the two sides of the width direction of the corresponding side pier bottom formwork 300 after passing the two long steel cables 400 through all the top transverse steel frames 203 in the main support frame 200. Ensure that the two ends of the long steel cables 400 are at the same height.

[0083] In some embodiments, the specific steps of step S220 include step S223, which is located after step S222. The specific content of step S223 is to manually connect the ends of the two middle steel cables 400 with the middle parts of the two sides of the width direction of the pier bottom template 300 on one side, and then connect the ends of the middle steel cables 400 with the middle ends of the two sides of the width direction of the corresponding side pier bottom template 300 after passing the two middle steel cables 400 through all the transverse steel frames 203 in the middle of the main support frame 200. Ensure that the two ends of the middle steel cables 400 are at the same height.

[0084] In some embodiments, the specific steps of step S220 include step S224, which is located after step S223. The specific content of step S224 is to manually connect the ends of the two short steel cables 400 with the lower halves of the two sides of the pier bottom template 300 in the width direction, and then connect the ends of the short steel cables 400 with the lower halves of the two sides of the width direction of the corresponding side pier bottom template 300 after passing the two middle steel cables 400 through all the transverse steel frames 203 at the bottom of the main support frame 200. Ensure that the two ends of the short steel cables 400 are at the same height.

[0085] In some embodiments, step S200 includes step S230. Step S230 is to fine-tune the position of the side pier bottom formwork 300.

[0086] In some embodiments, the specific steps of step S230 are: observe the position and angle of the side pier bottom template 300 through a total station. When the angle of the side pier bottom template 300 is incorrect, the construction personnel are informed through the communication equipment, and the construction personnel adjust the relative position of the steel cable 400 and the main support frame 200 to achieve the angle adjustment of the side pier bottom template 300. When the adjustment of the side pier bottom template 300 reaches the construction requirements. The construction personnel bundle the steel cable 400 and the main support frame 200 to fix the relative position of the steel cable 400 and the main support frame 200.

[0087] In some embodiments, an adjustment device is prefabricated on each steel cable 400. The length of the corresponding steel cable 400 can be adjusted by the adjustment device.

[0088] In some embodiments, in step S230, the length of the corresponding steel cable 400 can also be manually adjusted through an adjustment device until the angle of the side pier bottom formwork 300 reaches the requirement.

[0089] In some embodiments, the adjusting device includes a screw rod 600 and a nut 500, and the nut 500 is threadedly engaged with the screw rod 600. The steel cable 400 is divided into a first section and a second section, one end of the first section is connected to the side pier bottom formwork 300, and the other end is connected to the screw rod 600. One end of the second section is connected to the side pier bottom formwork 300 on the other side, and the other end is connected to the nut 500.

[0090] Furthermore, in step S230, the length of the steel cable 400 is adjusted by rotating the nut 500 to adjust the relative position of the nut 500 on the screw rod 600.

[0091] Furthermore, the first section and the second section of the steel cable 400, which are respectively connected to the screw rod 600 and the nut 500, are connected by a steel wire rope. When the screw rod and the nut are separated, the connection between the first section and the second section can be ensured by the steel wire rope, so that the steel wire rope will not break directly and cause the side pier bottom formwork 300 to collapse or other dangerous situations.

[0092] In some embodiments, a steel strand may be prefabricated on the steel cable 400. In step S230, when the adjustment of the side pier bottom formwork 300 reaches the construction requirement, the relative position of the steel cable 400 and the main support frame 200 is fixed by bundling the prefabricated steel strand with the main support frame 200.

[0093] Through step S220 to step S230, both ends of the steel cable 400 are connected to the two side pier bottom templates 300. The weight of the side pier bottom template 300 is transmitted from top to bottom to the main support frame 200 through the steel cable 400. If the side pier bottom template 300 is directly connected to the main support frame 200, the main support frame 200 will receive a force that separates the two ends, which may cause the main support frame 200 to be damaged or deformed. In the present application, the advantage of the main support frame 200 being able to withstand a stronger force in the vertical direction is utilized, and the main support frame 200 is not easily damaged. In addition, when the angle of the side pier bottom template 300 is incorrect, the angle adjustment of the side pier bottom template 300 can be achieved by adjusting the position of each steel cable 400.

[0094] In some embodiments, step S200 is followed by step S300. Step S300 is to cast the side pier, that is, to cast and form the side pier on the side pier bottom formwork 300;

[0095] Furthermore, the specific steps of step S300 are: lift the mold by the lifting equipment on the construction ship and transport it to the side pier bottom template 300. Manually fix the mold on the side pier bottom template 300, lift the side mold steel cage by the lifting equipment, and place the side mold steel cage in the mold. Pour concrete in the mold by the pouring equipment, and wait for the concrete to solidify to form the side pier. During the pouring process, ensure that the concrete is combined with the prefabricated horns on the cap 100.

[0096] In some embodiments, the step after step S300 is S400: Install the upper box beam support structure and the box beam bottom plate.

[0097] In some embodiments, step S400 includes S410 , and step S410 is laying a beam frame on the top of the main support frame 200 .

[0098] Furthermore, the specific steps of step S410 are: hoisting the I50 type transverse steel distribution main beam by a hoisting device. Manually assisting the transverse steel distribution main beam to be set on the main support frame 200, ensuring that the spacing between each transverse steel distribution main beam is 90 cm. Hoisting the I20 type steel distribution beam frame, manually laying the steel distribution beam frame on the transverse steel distribution main beam.

[0099] In some embodiments, step S400 includes step S420, which is performed after step S410. Step S420 is to install the cup-hook type scaffold 700 and the box beam mold on the beam frame.

[0100] Further, the specific steps of step S420 are: hoisting the cup-hook type scaffold 700 and the box beam mold to the top of the beam frame by a hoisting device, manually splicing the cup-hook type scaffold 700, and splicing the box beam mold at the corresponding position according to the drawing.

[0101] In some embodiments, step S400 includes step S430, and step S430 is performed after step S420. Step S430 is to cast the box beam.

[0102] Furthermore, the specific steps of step S430 are: pouring concrete in the box beam mold by pouring equipment, and waiting for the concrete to solidify after the pouring is completed.

[0103] Furthermore, the specific steps of step S430 are: placing the box girder reinforcement cage in the box girder mold by a lifting device, manually adjusting the position of the box girder reinforcement cage, pouring concrete in the box girder mold by a pouring device, and waiting for the concrete to solidify after the pouring is completed.

[0104] In some embodiments, step S400 is followed by step S500. Step S500 is to construct top slab concrete and complete prestressing.

[0105] Further, the specific steps of S500 are: lifting the steel top plate 800 by the lifting equipment and transporting it to the top of the box beam and the top of the cup-hook scaffold 700. The steel top plate 800 is manually laid, and concrete is poured on the steel top plate 800 by the pouring equipment, and the concrete is waited for solidification.

[0106] Furthermore, in step S500, after laying the steel roof 800, the process further includes lifting the roof mold by a lifting device and placing it on the steel roof 800. After manually adjusting the position of the roof mold, concrete is poured on the steel roof 800 by a pouring device.

[0107] In some embodiments, step S500 also includes tensioning the top plate by using a tensioning device.

[0108] In some embodiments, step S500 is followed by step S600 . Step S600 is to install the hanging basket structure 900 .

[0109] Furthermore, the specific steps of step S600 are: moving the hanging basket structure 900 to the top plate by means of a lifting device, and manually installing the hanging basket structure 900 to the construction position according to the drawings.

[0110] In the present application, the hanging basket structure 900 is a conventional structure and will not be described in detail again.

[0111] In some embodiments, step S600 is followed by step S700. Step S700 is to complete the connection between the bridge body and the side piers.

[0112] Furthermore, the specific steps of S700 are: manually constructing the bridge body on the top plate through the hanging basket 900, and gradually constructing horizontally in the direction of the side piers until the side piers are connected to the bridge body.

[0113] During the construction of the hanging basket structure 900, concrete is gradually poured to form a bridge body. During the construction process, the bridge body gradually extends outward. Because the top of the side pier is on the necessary path of the bridge body, the hanging basket 900 will inevitably connect the side pier with the bridge body during the construction process.

[0114] In this application, since the working process of the hanging basket 900 to construct the bridge body is a prior art, it will not be elaborated in detail.

[0115] Through the description of multiple embodiments of the bridge main pier construction method of the present invention, it can be seen that the bridge main pier construction method embodiment of the present invention has at least one or more of the following advantages:

[0116] 1. Through step S220 to step S230, both ends of the steel cable 400 are connected to the two side pier bottom templates 300. The weight of the side pier bottom template 300 is transmitted from top to bottom to the main support frame 200 through the steel cable 400. If the side pier bottom template 300 is directly connected to the main support frame 200, the main support frame 200 will receive a force that separates the two ends, which may cause the main support frame 200 to be damaged or deformed. In the present application, the advantage of the main support frame 200 being able to withstand a stronger force in the vertical direction is utilized, and the main support frame 200 is not easily damaged. In addition, when the angle of the side pier bottom template 300 is incorrect, the angle of the side pier bottom template 300 can be adjusted by adjusting the position of each steel cable 400.

[0117] 2. The adjusting device includes a screw rod 600 and a nut 500, and the nut 500 is threadedly engaged with the screw rod 600. The steel cable 400 is divided into a first section and a second section, one end of the first section is connected to the side pier bottom template 300, and the other end is connected to the screw rod 600. One end of the second section is connected to the side pier bottom template 300 on the other side, and the other end is connected to the nut 500. Further, in step S230, by rotating the nut 500, the relative position of the nut 500 on the screw rod 600 is adjusted to achieve the length adjustment of the steel cable 400.

[0118] 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.

[0119] 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 bridge main pier, characterized in that: include: S100, install the main support frame: install the main support frame on the offshore platform; S110, insert vertical steel frame; S111, install the third row of steel frames; S112, install the second and fourth row steel frames; S113, construction of the first and fifth rows of steel frames; S120, connecting the transverse steel frame; S200, install the side pier bottom formwork: S210, connecting the side pier bottom formwork to the cap; S220, pass the steel cable through the main support frame; connect the two ends of the steel cable to the bottom formworks of the two side piers respectively; S300, casting side piers: casting and forming side piers on the side pier bottom formwork; S400, install the upper box beam support structure and the box beam bottom plate; S500, construct top slab concrete and complete prestressing; S600, install the hanging basket structure; S700. Complete the connection between the bridge body and the side piers.

2. The method for constructing a main bridge pier according to claim 1, characterized in that: The steps before step S220 also include estimating the distance the steel cable is extended after being pulled, and selecting a steel cable of appropriate length according to construction requirements.

3. The method for constructing a main bridge pier according to claim 2, characterized in that: The specific steps of S220 include step S221. The specific content of step S221 is to select two long, two medium and two short steel cables according to the construction requirements; a total of six steel cables.

4. The method for constructing a main bridge pier according to claim 3, characterized in that: Step S221 is followed by step S222. The specific content of step S222 is to manually connect the ends of the two long steel cables with the top ends on both sides of the width direction of the pier bottom formwork on one side, and then pass the two long steel cables through all the top transverse steel frames in the main support frame, and then connect the ends of the long steel cables with the top ends on both sides of the width direction of the corresponding side pier bottom formwork; ensure that the two ends of the long steel cables are the same height.

5. The method for constructing a main bridge pier according to claim 4, characterized in that: Step S222 is followed by step S223. The specific content of step S223 is to manually connect the ends of the two middle steel cables with the middle parts of the pier bottom formwork on one side in the width direction, and then pass the two middle steel cables through all the horizontal steel frames in the middle of the main support frame, and then connect the ends of the middle steel cables with the middle ends on both sides of the corresponding side pier bottom formwork in the width direction; ensure that the two ends of the middle steel cables are the same height.

6. The method for constructing a main bridge pier according to claim 5, characterized in that: Step S223 is followed by step S224. The specific content of step S224 is to manually connect the ends of the two short steel cables with the lower halves on both sides of the width direction of the pier bottom formwork on one side, and then pass the two middle steel cables through all the transverse steel frames at the bottom of the main support frame, and then connect the ends of the short steel cables with the lower halves on both sides of the width direction of the corresponding side pier bottom formwork; ensure that the two ends of the short steel cables are the same height.

7. The method for constructing a main bridge pier according to claim 6, characterized in that: Step S200 includes step S230; step S230 is to fine-tune the position of the side pier bottom formwork.

8. The method for constructing a main bridge pier according to claim 1, characterized in that: The specific steps of step S300 are: lifting the mold by the lifting equipment on the construction ship and transporting it to the bottom formwork of the side pier; manually fixing the mold on the bottom formwork of the side pier, lifting the side form steel cage by the lifting equipment, and placing the side form steel cage in the mold; pouring concrete in the mold by the pouring equipment, and waiting for the concrete to solidify to form the side pier.

9. The method for constructing a main bridge pier according to claim 1, characterized in that: Step S400 includes step S410, S420 and step S430; Step S410 is to lay a beam frame on the top of the main support frame; Step S420 is to install the cup-hook type scaffolding and the box beam mold on the beam frame; Step S430 is to cast the box girder.

10. The method for constructing a main bridge pier according to claim 1, characterized in that: The specific steps of S700 are to manually construct the bridge body on the top plate through a hanging basket, and gradually construct horizontally in the direction of the side piers until the side piers are connected to the bridge body.

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