Temporary support and construction method for sea-crossing cable-stayed bridge

Abstract

The present invention discloses a temporary support and construction method for a cross-sea cable-stayed bridge. The cross-sea cable-stayed bridge comprises piers and steel-concrete composite beams, wherein the piers comprise main tower piers, auxiliary piers and side piers, wherein the main tower piers, the auxiliary piers and the side piers are distributed along the bridge direction, and the temporary support of the cross-sea cable-stayed bridge comprises: a pier-side support group, wherein the pier-side support group is arranged along the outer edge of the main tower pier; an auxiliary support, wherein the auxiliary support is arranged on the auxiliary pier; a temporary pier group, wherein the temporary pier group is arranged on the outer side of the pier-side support group; and a slideway assembly, wherein the slideway assembly is arranged on the pier-side support group, and the slideway assembly is used to drag the steel beam of the cable-free beam section of the tower area. The present invention utilizes the pier-side support group, the auxiliary support and the temporary pier group to ensure the stability of the steel beam during the installation process, thereby reducing the difficulty of the steel beam construction of the cross-sea cable-stayed bridge, and while ensuring the construction quality of the steel beam, the installation and construction efficiency of the steel beam is higher, thereby ensuring the construction period.

Description

Technical Field

[0001] The invention relates to the technical field of cross-sea cable-stayed bridge engineering, and in particular to a temporary support and a construction method for a cross-sea cable-stayed bridge. Background Art

[0002] A cross-sea cable-stayed bridge is a bridge that spans a bay, strait, deep sea, estuary or other marine waters, and generally has a longer span and line.

[0003] A cross-sea cable-stayed bridge is a bridge that spans a bay, strait, deep sea, estuary or other marine waters, and generally has a longer span and line.

[0004] In the related technology, a large lifting device is used to simultaneously build steel beams from both ends of the sea-crossing cable-stayed bridge towards each other, and then close the steel beams.

[0005] However, during the construction of the sea-crossing cable-stayed bridge, the construction environment is complex and it is difficult to establish a construction work surface on the sea surface, resulting in low construction efficiency of the steel beams and difficulty in ensuring the construction period. Summary of the invention

[0006] The main purpose of the present invention is to provide a temporary support and construction method for a cross-sea cable-stayed bridge, aiming to solve the technical problems in the prior art of low construction efficiency of steel beams and difficulty in ensuring the construction period.

[0007] To achieve the above-mentioned purpose, according to a first aspect of an embodiment of the present disclosure, the present invention provides a temporary support for a sea-crossing cable-stayed bridge, the sea-crossing cable-stayed bridge comprising piers and steel-concrete composite beams, the steel beams being arranged on the piers, the piers comprising main tower piers, auxiliary piers and side piers, the main tower piers and the auxiliary piers and side piers being distributed along the bridge direction, the temporary support for the sea-crossing cable-stayed bridge comprising:

[0008] A pier-side support group, wherein the pier-side support group is arranged along the outer edge of the main tower pier;

[0009] An auxiliary bracket, the auxiliary bracket is arranged on the auxiliary pier, and the auxiliary bracket extends in the transverse direction of the bridge;

[0010] A temporary pier group, which is arranged outside the pier-side support group and extends along the longitudinal direction of the bridge; and

[0011] A slideway assembly, the slideway assembly extending along the longitudinal direction of the bridge and arranged on the pier-side support assembly;

[0012] in,

[0013] The slideway assembly is used to drag the cable-free beam section steel beam of the tower area.

[0014] Optionally, the pier side support group includes:

[0015] A plurality of first steel pipe column supports, wherein the plurality of first steel pipe column supports are arranged around the outer edge of the main tower pier;

[0016] A plurality of longitudinal distribution beams, the plurality of longitudinal distribution beams extending along the longitudinal bridge direction, and the plurality of longitudinal distribution beams being arranged on the plurality of first steel pipe column supports through a plurality of first column caps; and

[0017] A plurality of first transverse distribution beams are provided, wherein the plurality of first transverse distribution beams extend along the transverse bridge direction, and the plurality of first transverse distribution beams are supported by a plurality of first steel pipe columns through a plurality of second column caps.

[0018] Optionally, the main tower pier includes a tower base and a main bridge tower near pier section (lower tower column and lower cross beam), the main bridge tower near pier section (lower tower column and lower cross beam) is arranged on the tower base, and the plurality of first steel pipe column supports include:

[0019] An inner steel pipe column support, wherein the inner steel pipe column support is vertically arranged at the outer edge of the main tower pier; and

[0020] An outer steel pipe column support, wherein the outer steel pipe column support is obliquely arranged at the outer edge of the inner steel pipe column support, and the outer steel pipe column support is arranged corresponding to the inner steel pipe column support; wherein,

[0021] In the longitudinal bridge direction, the distance between the inner steel pipe column support and the outer steel pipe column support is gradually expanded in the direction from the pedestal and the tower base to the near pier section.

[0022] Optionally, the slide assembly includes:

[0023] A slideway beam, wherein the slideway beam is arranged on the pier side support group along the longitudinal direction of the bridge; and

[0024] A slider is slidably arranged on the slideway beam.

[0025] Optionally, the auxiliary bracket includes:

[0026] A plurality of second steel pipe pile supports, wherein the plurality of second steel pipe pile supports are arranged at intervals on the same side of the auxiliary pier;

[0027] A plurality of auxiliary transverse distribution beams are provided between a plurality of the second steel pipe pile supports along the transverse direction of the bridge.

[0028] Optionally, the temporary pier group includes:

[0029] A first temporary pier, wherein the first temporary pier is arranged along the longitudinal direction of the bridge;

[0030] A pad board, which is arranged on the top of the first temporary pier;

[0031] A second temporary pier, the second temporary pier is arranged along the longitudinal direction of the bridge at the bottom of the steel-concrete composite beam in the middle of the main span;

[0032] A first height-adjusting pad block is arranged on the top of the second temporary pier.

[0033] Optionally, the first temporary pier includes:

[0034] A plurality of third steel pipe pile supports, wherein the plurality of third steel pipe pile supports are arranged along the longitudinal direction of the bridge on both sides of the main tower pier in the longitudinal direction of the bridge;

[0035] A plurality of double-layer distribution beams, wherein the plurality of double-layer distribution beams are arranged between the plurality of third steel pipe pile supports along the longitudinal direction of the bridge; wherein,

[0036] The pad is arranged on the top of the double-layer distribution beam.

[0037] Optionally, the second temporary pier includes:

[0038] A plurality of fourth steel pipe pile supports, wherein the plurality of fourth steel pipe pile supports are arranged along the longitudinal direction of the bridge at the bottom of the steel-concrete composite beam in the middle of the main span;

[0039] A plurality of second transverse distribution beams, wherein the plurality of second transverse distribution beams are arranged between the plurality of fourth steel pipe pile supports along the longitudinal direction of the bridge; wherein,

[0040] The first height-adjusting pad is arranged on the top of the second transverse distribution beam.

[0041] Optionally, the auxiliary bracket further includes:

[0042] A second height-adjusting pad block is disposed on the top of the auxiliary transverse distribution beam.

[0043] According to a second aspect of the disclosed embodiment, the present invention further provides a temporary support construction method for a cross-sea cable-stayed bridge, which is used for the temporary support of the cross-sea cable-stayed bridge. The temporary support construction method for the cross-sea cable-stayed bridge includes:

[0044] Constructing a pier-side support group along the outer edge of the main tower pier, constructing an auxiliary support along the transverse direction of the auxiliary pier, and constructing a temporary pier group outside the pier-side support group;

[0045] constructing a slideway assembly on the pier-side support assembly;

[0046] The cable-free beam section steel beam is dragged to a preset position using the slideway assembly, and the steel beam section is installed on the temporary support to form a steel main beam of the steel-concrete composite beam.

[0047] The technical solution of the present invention utilizes pier-side support groups, auxiliary supports and pier-side support groups to provide installation conditions for the installation process of steel beams, thereby ensuring the stability of the steel beams during the installation process, reducing the difficulty of steel beam construction for cross-sea cable-stayed bridges, and while ensuring the construction quality of the steel beams, making the installation and construction efficiency of the steel beams higher and ensuring the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0049] Figure 1 It is a schematic diagram of the overall installation structure of the temporary support of the present invention;

[0050] Figure 2 It is a schematic diagram of the installation structure of the pier side support of the present invention;

[0051] Figure 3 It is a schematic diagram of the top view of the structure of the pier side support of the present invention;

[0052] Figure 4 It is a schematic diagram of the installation structure of the auxiliary bracket of the present invention;

[0053] Figure 5 The present invention is a schematic diagram of the process of constructing a temporary support for a sea-crossing cable-stayed bridge.

[0054] Label name Label name 100 Steel beam 200 Main tower pier 300 Auxiliary pier 400 Pier side support group 500 Auxiliary bracket 600 Temporary pier group 410 Internal steel pipe pile support 420 External steel pipe pile support 510 Second steel pipe pile support 520 Auxiliary transverse distribution beam

[0055] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0056] 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 of the present invention. 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 creative work are within the scope of protection of the present invention.

[0057] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0060] The inventive concept of the present invention is further described below in conjunction with some specific implementation methods.

[0061] The invention provides a temporary support for a sea-crossing cable-stayed bridge.

[0062] Reference Figure 1 , Figure 1 It is a schematic diagram of the overall installation structure of the temporary support of the present invention.

[0063] In one embodiment of the present invention, Figure 1 As shown, the cross-sea cable-stayed bridge includes piers and steel-concrete composite beams 100, and the section steel-concrete composite beams 100 are arranged on the piers. The piers include a main tower pier 200, an auxiliary pier 300, and a side pier. The main tower pier 200, the auxiliary pier 300, and the side piers are distributed along the longitudinal direction of the bridge. The temporary supports of the cross-sea cable-stayed bridge include: a pier-side support group 400, which is arranged along the outer edge of the main tower pier 200; an auxiliary support 500, which is arranged on the auxiliary pier 300, and the auxiliary support 500 extends along the transverse direction of the bridge; a temporary pier group 600, which is arranged on the outer side of the pier-side support group 400, and the temporary pier group 600 extends along the longitudinal direction of the bridge; and a slideway assembly, which extends along the longitudinal direction of the bridge and is arranged on the pier-side support group 400; wherein the slideway assembly is used to drag the cable-free beam section steel beam 100 in the tower area.

[0064] For ease of understanding, a specific implementation is shown here:

[0065] The cross-sea cable-stayed bridge includes piers 18, 19, 20, 21, 22 and 23, which are distributed along the bridge direction;

[0066] The construction of 400 pier support groups was carried out beside Pier No. 20 and Pier No. 21, and steel pipe columns with dimensions of φ630×10mm were used for support. Column caps were made on the steel pipe columns, and transverse distribution beams or longitudinal distribution beams were placed on the column caps. There were height adjustment pads above the distribution beams. Slide beams and sliders were also set on the steel pipe piles at the main longitudinal beams to carry out the 100-degree dragging operation of the cable-free beam section of the tower area. The connection material between the middle steel pipe column and the main pier was industrial steel 25a, and the remaining connection system was φ325×8mm. The top of the oblique steel pipe column was reinforced by steel plate welding.

[0067] Auxiliary support 500 was constructed at Pier 19 and Pier 22 using φ630×10mm steel pipe piles. A horizontal first-level distribution beam was placed on the upper layer of the steel pipe piles. There were height adjustment pads above the distribution beams. A connection system was set between the steel pipe piles in the longitudinal and transverse directions of the bridge. The connection system was connected using double-piece 20a channel steel.

[0068] Between piers 18 and 23, and outside the bracket group 400 beside the piers, a temporary pier group 600 is symmetrically set along the bridge direction, and the steel beam 100 beam section is installed using its own strength and stiffness and an auxiliary full-revolving crane;

[0069] Temporary pier group 600 uses φ820×12mm steel pipes for piling, and two layers of horizontal and vertical distribution beams are placed on the upper layer. There are pads above the distribution beams, and connecting systems are set between the longitudinal and transverse steel pipe piles. The connecting systems are connected by double-piece 20a channel steel.

[0070] When dragging the cable-free beam section steel beam 100 of the tower area, use the slide assembly, i.e., the slide beam and the sliding block, to drag the cable-free beam section steel beam 100 of the tower area, and drag the cable-free beam section steel beam 100 of the tower area to the pier side bracket corresponding to the design requirements, so as to temporarily support the cable-free beam section steel beam 100 of the tower area, so as to facilitate the subsequent installation of the cable-free beam section steel beam 100 of the tower area.

[0071] The technical solution of the present invention utilizes the pier-side support group 400, the auxiliary support 500 and the pier-side support group 400 to provide construction conditions for the installation process of the steel beam 100, thereby ensuring the stability of the steel beam 100 during the installation process, reducing the difficulty of the construction of the steel beam 100 of the cross-sea cable-stayed bridge, and while ensuring the construction quality of the steel beam 100, making the installation and construction efficiency higher and ensuring the construction period.

[0072] In one embodiment, the pier-side support group 400 includes: a plurality of first steel pipe column supports, a plurality of first steel pipe column supports are arranged around the outer edge of the main tower pier 200; a plurality of longitudinal distribution beams, a plurality of longitudinal distribution beams extend along the longitudinal direction of the bridge, and a plurality of longitudinal distribution beams are arranged on the plurality of first steel pipe column supports through a plurality of first column caps; and a plurality of first transverse distribution beams, a plurality of first transverse distribution beams extend along the transverse direction of the bridge, and a plurality of first transverse distribution beams are arranged on the plurality of first steel pipe column supports through a plurality of second column caps.

[0073] In order to ensure that the strength of the pier-side support group 400 itself is sufficient to support the cable-free beam section steel beam 100 in the tower area, a plurality of first steel pipe column supports are evenly arranged on the outer edge of the main tower pier 200, and the plurality of first steel pipe column supports are connected by a plurality of longitudinal distribution beams, and the plurality of longitudinal distribution beams are connected to the plurality of first steel pipe column supports by a plurality of first column caps, and the number and position of the first column caps are determined according to actual construction requirements.

[0074] Reference Figure 2 and Figure 3 , Figure 2 It is a schematic diagram of the installation structure of the pier side support of the present invention; Figure 3 It is a schematic diagram of the top view of the structure of the pier side support of the present invention.

[0075] In this embodiment, Figure 2 and Figure 3 As shown, the main tower pier 200 includes a tower base and a main bridge tower near pier section (lower tower column and lower cross beam), the main bridge tower near pier section (lower tower column and lower cross beam) is arranged on the tower base, and multiple first steel pipe column supports include: an inner steel pipe column support 410, the inner steel pipe column support 410 is vertically arranged on the outer edge of the main tower pier 200; and, an outer steel pipe column support 420, the outer steel pipe column support 420 is obliquely arranged on the outer edge of the inner steel pipe column support 410, and the outer steel pipe column support 420 is arranged corresponding to the inner steel pipe column support 410; wherein, in the longitudinal bridge direction, the distance between the inner steel pipe column pile support 410 and the outer steel pipe column support 420 is gradually expanded in the direction from the pedestal and the tower base to the near pier section.

[0076] As an implementation method of this embodiment, multiple inner steel pipe column supports 410 are vertically arranged around the outer edge of the main tower pier 200, and multiple outer steel pipe column supports 420 are obliquely arranged around the outer edge of the multiple inner steel pipe column supports 410. In the longitudinal bridge direction, the distance between the inner steel pipe column supports 410 and the outer steel pipe column supports 420 is gradually expanded in the direction from the tower base to the near pier section.

[0077] As another implementation of this embodiment, in order to ensure the strength of the pier-side support while reducing the construction difficulty of the pier-side support, a plurality of inner steel pipe column supports 410 are vertically arranged around the outer edge of the main tower pier 200, a portion of the outer steel pipe column supports 420 are obliquely arranged around the outer edge of the plurality of inner steel pipe column supports 410, a portion of the outer steel pipe column supports 420 are evenly and spacedly distributed on opposite sides of the main tower pier 200, another portion of the outer steel pipe column supports 420 are vertically arranged around the outer edge of the plurality of inner steel pipe column supports 410, and are arranged together with the obliquely arranged outer steel pipe column supports 420 on the inner steel pipe column supports 410.

[0078] In one embodiment, the slideway assembly includes: a slideway beam, which is arranged on the pier-side support group 400 along the longitudinal direction of the bridge; and a slider, which is slidably arranged on the slideway beam.

[0079] The slideway beam is arranged at the top of the pier-side support group 400 along the longitudinal direction of the bridge, and is temporarily fixed to the pier-side support group 400 to provide a hauling platform for the construction of the cable-free beam section steel beam 100 in the hauling tower area.

[0080] Reference Figure 4 , Figure 4 It is a schematic diagram of the installation structure of the auxiliary bracket 500 of the present invention.

[0081] In one embodiment, if Figure 4 As shown, the auxiliary support 500 includes: a plurality of second steel pipe pile supports 510, which are arranged at intervals on the same side of the auxiliary pier 300; and a plurality of auxiliary transverse distribution beams 520, which are arranged between the plurality of second steel pipe pile supports 510 along the transverse direction of the bridge.

[0082] In order to ensure the strength and stability of the auxiliary support 500 itself, a plurality of second steel pipe pile supports 510 are provided on one side of the auxiliary pier 300 , and any second steel pipe pile support 510 among the plurality of second steel pipe pile supports 510 is connected to the auxiliary pier 300 .

[0083] In one embodiment, the temporary pier group 600 includes: a first temporary pier, which is arranged along the longitudinal direction of the bridge; a pad plate, which is arranged on the top of the first temporary pier; a second temporary pier, which is arranged at the bottom of the steel-concrete composite beam in the middle of the main span along the longitudinal direction of the bridge; and a first height adjustment pad block, which is arranged on the top of the second temporary pier.

[0084] It can be understood that in order to facilitate the adjustment of the elevation of the steel beam 100, a first height adjustment pad is provided on the top of the second temporary pier, and the steel beam 100 is raised by the first height adjustment pad so that the elevation of the steel beam 100 meets the design requirements, and the temporary pier group 600 provides temporary support conditions for the steel beam 100, which facilitates the subsequent construction of the steel beam 100.

[0085] In this embodiment, the first temporary pier includes: a plurality of third steel pipe pile supports, which are arranged on both sides of the main tower pier 200 in the longitudinal direction of the bridge; a plurality of double-layer distribution beams, which are arranged between the plurality of third steel pipe pile supports in the longitudinal direction of the bridge; wherein the pad is arranged on the top of the double-layer distribution beam.

[0086] It can be understood that in order to match the second temporary pier to facilitate the adjustment of the elevation of the steel beam 100, a pad is provided on the top of the first temporary pier, and the steel beam 100 is raised by the pad so that the elevation of the steel beam 100 meets the design requirements and at the same time matches the elevation of the steel beam 100 adjusted by the second temporary pier, so that the line shape of the steel beam 100 meets the construction design requirements, which is convenient for the subsequent construction of the steel beam 100.

[0087] In this embodiment, the second temporary pier includes: a plurality of fourth steel pipe pile supports, which are arranged at the bottom of the steel-concrete composite beam in the middle of the main span along the longitudinal direction of the bridge; a plurality of second transverse distribution beams, which are arranged between the plurality of fourth steel pipe pile supports along the longitudinal direction of the bridge; wherein the first height adjustment pad is arranged at the top of the second transverse distribution beam.

[0088] It can be understood that the first temporary pier and the second temporary pier are constructed separately to facilitate the subsequent construction of the steel beam 100 and provide a construction work surface for the construction of the steel beam 100 .

[0089] In one embodiment, the auxiliary bracket 500 further includes: a second height-adjusting pad block, which is disposed on the top of the auxiliary transverse distribution beam 520 .

[0090] It can be understood that in order to match the first temporary pier and the second temporary pier to adjust the linear shape of the steel beam 100 so that the elevation of the steel beam 100 meets the design requirements, a second height adjustment pad is provided on the top of the auxiliary transverse distribution beam 520 .

[0091] Reference Figure 5 , Figure 5 The present invention is a schematic diagram of the process of constructing a temporary support for a sea-crossing cable-stayed bridge.

[0092] In addition, if Figure 5 As shown, the present invention also proposes a temporary support construction method for a cross-sea cable-stayed bridge. The temporary support construction method for a cross-sea cable-stayed bridge is used for the temporary support of the cross-sea cable-stayed bridge mentioned above. The temporary support construction method for the cross-sea cable-stayed bridge includes:

[0093] S100: constructing a pier-side support group 400 along the outer edge of the main tower pier 200, constructing an auxiliary support 500 along the transverse direction of the auxiliary pier 300, and constructing a temporary pier group 600 outside the pier-side support group 400;

[0094] S200: constructing a slideway assembly on the pier-side support group 400 to form a temporary support;

[0095] S300: Use a slideway assembly to drag the cable-free beam section steel beam 100 of the tower area to a preset position, and install the steel beam 100 on a temporary support to form a steel main beam of the steel-concrete composite beam.

[0096] Among them, the preset position is the position required by the construction design.

[0097] A pier-side support group 400 is formed on the outer edge of the main tower pier 200, and an auxiliary support 500 is constructed along the transverse direction of the auxiliary pier 300. A first-height dragging construction working surface for the cable-free beam section steel beam 100 of the construction tower area is established through the pier-side support group 400, and a second-height construction working surface is provided through the temporary pier group 600. The elevation of the first working surface is not equal to the elevation of the second-height working surface. Multiple construction working surfaces are provided to facilitate the subsequent construction of the steel beam 100. The temporary support provides temporary support for the steel beam 100 while being used to establish multiple construction working surfaces.

[0098] It can be understood that the specific structure of the temporary support of the cross-sea cable-stayed bridge refers to the above-mentioned embodiment. Since the temporary support construction method of the cross-sea cable-stayed bridge adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0099] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A temporary support for a sea-crossing cable-stayed bridge, characterized in that: The cross-sea cable-stayed bridge comprises piers and steel-concrete composite beams, wherein the steel-concrete composite beams are arranged on the piers, wherein the piers comprise main tower piers, auxiliary piers and side piers, wherein the main tower piers, the auxiliary piers and the side piers are distributed along the bridge direction, and the temporary support of the cross-sea cable-stayed bridge comprises: A pier-side support group, wherein the pier-side support group is arranged along the outer edge of the main tower pier; An auxiliary bracket, the auxiliary bracket is arranged on the auxiliary pier, and the auxiliary bracket extends in the transverse direction of the bridge; A temporary pier group, which is arranged outside the pier-side support group and extends along the longitudinal direction of the bridge; and A slideway assembly, the slideway assembly extending along the longitudinal direction of the bridge and arranged on the bracket group beside the pier; the slideway assembly is used to drag the steel beam of the cable-free beam section in the tower area; Among them, the pier-side support group includes a plurality of first steel pipe column supports, and the plurality of first steel pipe column supports include a plurality of inner steel pipe column supports and a plurality of outer steel pipe column supports. The plurality of inner steel pipe column supports are vertically arranged around the outer edge of the main tower pier, a part of the plurality of outer steel pipe column supports are obliquely arranged around the outer edge of the plurality of inner steel pipe column supports, a part of the plurality of outer steel pipe column supports are evenly and spacedly distributed on opposite sides of the main tower pier, and another part of the plurality of outer steel pipe column supports are vertically arranged around the outer edge of the plurality of inner steel pipe column supports, and are jointly arranged around the inner steel pipe column supports together with the obliquely arranged outer steel pipe column supports.

2. The temporary support for a sea-crossing cable-stayed bridge according to claim 1, characterized in that: The pier side support group also includes: A plurality of longitudinal distribution beams, the plurality of longitudinal distribution beams extending along the longitudinal bridge direction, and the plurality of longitudinal distribution beams being arranged on the plurality of first steel pipe column supports through a plurality of first column caps; and A plurality of first transverse distribution beams are provided, wherein the plurality of first transverse distribution beams extend along the transverse bridge direction, and the plurality of first transverse distribution beams are supported by a plurality of first steel pipe columns through a plurality of second column caps.

3. The temporary support for a sea-crossing cable-stayed bridge according to claim 2, characterized in that: The slide assembly comprises: A slideway beam, wherein the slideway beam is arranged on the pier side support group along the longitudinal direction of the bridge; and A slider is slidably arranged on the slideway beam.

4. The temporary support for a sea-crossing cable-stayed bridge according to any one of claims 2 or 3, characterized in that: The auxiliary support comprises: A plurality of second steel pipe pile supports, wherein the plurality of second steel pipe pile supports are arranged at intervals on the same side of the auxiliary pier; A plurality of auxiliary transverse distribution beams are provided between a plurality of the second steel pipe pile supports along the transverse direction of the bridge.

5. The temporary support for a sea-crossing cable-stayed bridge according to claim 4, characterized in that: The temporary pier group comprises: A first temporary pier, wherein the first temporary pier is arranged along the longitudinal direction of the bridge; A pad board, which is arranged on the top of the first temporary pier; A second temporary pier is arranged along the longitudinal direction of the bridge at the bottom of the steel-concrete composite beam in the middle of the main span; and A first height-adjusting pad block is arranged on the top of the second temporary pier.

6. The temporary support for a sea-crossing cable-stayed bridge according to claim 5, characterized in that: The first temporary pier comprises: A plurality of third steel pipe pile supports, wherein the plurality of third steel pipe pile supports are arranged along the longitudinal direction of the bridge on both sides of the main tower pier in the longitudinal direction of the bridge; A plurality of double-layer distribution beams, wherein the plurality of double-layer distribution beams are arranged between the plurality of third steel pipe pile supports along the longitudinal direction of the bridge; wherein, The pad is arranged on the top of the double-layer distribution beam.

7. The temporary support for a sea-crossing cable-stayed bridge according to claim 6, characterized in that: The second temporary pier comprises: A plurality of fourth steel pipe pile supports, wherein the plurality of fourth steel pipe pile supports are arranged along the longitudinal direction of the bridge at the bottom of the steel-concrete composite beam in the middle of the main span; A plurality of second transverse distribution beams, wherein the plurality of second transverse distribution beams are arranged between the plurality of fourth steel pipe pile supports along the longitudinal direction of the bridge; wherein, The first height-adjusting pad is arranged on the top of the second transverse distribution beam.

8. The temporary support for a sea-crossing cable-stayed bridge according to claim 7, characterized in that: The auxiliary support further comprises: A second height-adjusting pad block is arranged on the top of the auxiliary transverse distribution beam.

9. A temporary support construction method for a sea-crossing cable-stayed bridge, characterized in that: A temporary support for a cross-sea cable-stayed bridge according to any one of claims 1 to 8, wherein the construction method of the temporary support for the cross-sea cable-stayed bridge comprises: Constructing a pier-side support group along the outer edge of the main tower pier, constructing an auxiliary support along the transverse direction of the auxiliary pier, and constructing a temporary pier group outside the pier-side support group; constructing a slideway assembly on the pier-side support assembly; The slideway assembly is used to drag the steel beam without cable beam section to a preset position, and the steel beam cable beam section and the closure section are installed on the temporary support to form the steel main beam of the steel-concrete composite beam.

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