Bilateral I-shaped steel mixed superposed beam cable-stayed bridge tower area support system

Abstract

The utility model provides a bilateral I-shaped steel mixed superposed beam cable-stayed bridge tower area support system, a tower area support comprises a crane support and a plurality of side main beam brackets, the crane support is arranged in the middle of a lower cross beam, the side main beam brackets are symmetrically arranged on two sides of the crane support, and a deck crane is used for supporting and assembling a steel cross beam. The splicing and anchoring platform deck crane and the side main beam bracket are used for supporting and positioning the side main beam, and the problem that a temporary floor stand needs to be erected in the construction of the bilateral I-shaped steel mixed superposed beam cable-stayed bridge is solved.

Description

Technical Field

[0001] The utility model relates to the field of cable-stayed bridge support construction, in particular to a double-sided I-beam hybrid composite beam cable-stayed bridge tower area support system. Background Art

[0002] In the construction of double-sided I-beam composite composite cable-stayed bridges, the design and implementation of the tower support system is a key step, which directly affects the construction efficiency and structural stability of the bridge. Traditional construction methods often involve the use of temporary floor supports when installing the tower beam sections. This type of support is not only difficult and costly to construct, but also time-consuming. Due to the space limitations in the tower area, the arrangement of the bridge cranes becomes a challenge. It is usually necessary to wait for the assembly of the 1# beam section to be completed before sufficient standing space can be provided for the two bridge cranes, which undoubtedly increases the cost of additional supports and time.

[0003] During the main beam suspension process, the construction operation risk of high-strength bolts is relatively high, and the lack of a dedicated platform makes the operation more difficult. The existing tower support system is obviously unable to meet the needs of fast, safe and efficient construction. Therefore, in response to these problems and deficiencies in the existing technology, a new double-sided I-beam hybrid composite beam cable-stayed bridge tower support system is designed, which can significantly improve construction efficiency, reduce costs, and enhance the safety and convenience of the construction process, becoming an urgent need for the development of the industry. Utility Model Content

[0004] The main purpose of the utility model is to provide a double-sided I-beam composite composite beam cable-stayed bridge tower area support system, which solves the problem of needing to set up temporary ground supports in the construction of double-sided I-beam composite composite beam cable-stayed bridges.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a double-sided I-beam hybrid composite beam cable-stayed bridge tower area support system, the tower area support includes a crane support and a plurality of side main beam brackets, the crane support is arranged in the middle position of the lower cross beam, and the side main beam brackets are symmetrically arranged on both sides of the crane support.

[0006] The function of the bridge deck crane is to support and assemble steel beams, assemble and anchor the bridge deck crane, and the function of the side main beam bracket is to support and position the side main beam.

[0007] In the preferred embodiment, embedded parts A, B, C and D are provided on the lower cross beam;

[0008] A damper pad stone and a support pad stone are arranged above the lower cross beam.

[0009] In the preferred embodiment, the crane support includes a crane bracket, and a plurality of crane diagonal braces are provided between the crane bracket and the lower crossbeam, and the crane diagonal braces are connected to the embedded parts A on the lower crossbeam;

[0010] A column B is arranged between the crane bracket and the lower cross beam, and the anchor rod passes through the crane bracket and the column B from top to bottom in sequence and is connected to the lower cross beam below.

[0011] In the preferred embodiment, an embedded part is provided between the column B and the lower cross beam, a distribution beam B is provided above the crane bracket, and a distribution beam A is provided at the top of the column A above the distribution beam B.

[0012] In the preferred embodiment, the side main beam bracket includes a main beam bracket, a main beam bracket, and a plurality of main beam diagonal braces are provided between the main beam bracket and the lower cross beam;

[0013] The main beam diagonal brace is connected to the embedded part D on the lower cross beam, and one end of the main beam bracket is connected to the embedded part C in the damper pad stone.

[0014] In the preferred solution, a threaded steel bar penetrating the damper pad is provided at one end of the main beam support close to the damper pad, and the threaded steel bar is used to tighten the main beam supports on both sides of the damper pad.

[0015] The utility model provides a double-sided I-beam composite beam cable-stayed bridge tower area support system, which has the following beneficial effects: the design of the double-sided I-beam composite beam cable-stayed bridge tower area support system effectively improves construction efficiency, reduces costs, and enhances the safety and convenience of the construction process. The new system reduces the use of temporary floor supports, simplifies construction steps, shortens the construction period, optimizes the layout of bridge deck cranes, and improves the stability and safety of lifting operations. The new system also reduces the operational risks during the main beam suspension process and improves the safety and reliability of the overall construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic elevation diagram of the bridge deck crane support of the utility model;

[0018] Figure 2 It is a top view of the tower area support of the utility model;

[0019] Figure 3 It is a schematic diagram of assembling the steel crossbeam of the utility model;

[0020] Figure 4 It is a schematic diagram of the connection of the steel crossbeam of the utility model;

[0021] Figure 5 It is a partial top view of the lower cross beam of the utility model;

[0022] Figure 6 It is a schematic diagram of the installation of the bridge deck crane of the utility model;

[0023] Figure 7It is a schematic diagram of the bridge deck crane of the utility model at the edge;

[0024] Figure 8 It is a schematic diagram with the bridge deck crane of the utility model in the middle;

[0025] Fig. 9 It is a schematic diagram of assembling the side main beam of the utility model;

[0026] Fig.10 It is a schematic diagram of the utility model after the side main beam is assembled;

[0027] Fig.11 It is a layout diagram of the steel strand of the utility model;

[0028] Fig.12 It is a layout diagram of the embedded part E of the utility model;

[0029] Fig.13 It is a schematic diagram of the layout of the rigid connecting rod of the utility model;

[0030] Fig.14 It is a schematic diagram of the layout of the rigid connecting rod with the jack added in the utility model;

[0031] Fig.15 It is an axonometric view of the special lifting device of the utility model;

[0032] Fig.16 It is a cross-sectional view of the special lifting device of the utility model;

[0033] Fig.17 It is an axonometric view of the hook assembly of the utility model;

[0034] Fig.18 It is a front view of the hook assembly of the utility model;

[0035] Fig.19 It is a front view of the lifting station of the utility model;

[0036] Fig. 20 This is a construction diagram of the 12# beam section of the utility model;

[0037] Fig.21 It is a schematic diagram of the construction position of the auxiliary pier of the utility model;

[0038] Fig. 22 It is a schematic diagram of equal strength of the 12# beam section of the utility model;

[0039] Fig.23 This is a schematic diagram of the closing of the last section of the utility model;

[0040] Fig.24 This is a structural diagram of the auxiliary pier of the utility model.

[0041] In the figure: vertical pad 203; side main beam bracket 3; main beam support 301; main beam diagonal support 302; pad beam 303; column C304; embedded part C305; embedded part D306; threaded steel 307; middle side main beam 308; side end side main beam 309; steel cross beam 4; middle segment 401; end segment 402; steel strand 403; transverse block 404; transverse corbel 405; damping connector 406; rigid connecting rod 407; embedded part E408; top fastener 409; first jack 410; fixed support 411; crane assembly 5; crane base 501; bridge crane 502; first push rod 503; slider 504; guide rail 505; second push rod 506; low anchor seat 507; forward cylinder 508; shoulder beam 6; first adjustment hole 6 01; sliding seat 7; sliding sleeve 701; side wing plate 702; top connecting plate 703; first pin 704; bottom connecting plate 705; connecting piece 706; hook assembly 8; hook beam 801; hook connecting part 802; second adjustment hole 803; anti-slip groove 804; hook 805; jaw 806; anti-slip plate 807; anti-slip pin 808; lifting station 9; lifting truss 901; rear support leg 902; front support leg 903; front adjustment pad 904; support leg distribution beam 905; rear adjustment pad 906; 9# beam section 10; variable cross-section beam section 11; 10# beam section 12; 11# beam section 13; 12# beam section 14; auxiliary pier 15; fixed seat 1501; jack 1502; temporary support 1503; pier body 1504; special lifting device 16. DETAILED DESCRIPTION

[0042] Example 1

[0043] like Figure 1-2 As shown, a double-sided I-beam composite beam cable-stayed bridge tower area support system, the tower area support 1 includes a crane support 110 and a plurality of side main beam brackets 3, the crane support 110 is arranged in the middle position of the lower cross beam 2, and the side main beam brackets 3 are symmetrically arranged on both sides of the crane support 110.

[0044] The function of the bridge crane is to support and assemble the steel beams, assemble and anchor the bridge crane 502, and the function of the side main beam bracket 3 is to support and position the side main beam.

[0045] In the preferred embodiment, the lower cross beam 2 is provided with embedded parts A, embedded parts B, embedded parts C and embedded parts D;

[0046] A damper pad stone 201 and a support pad stone 202 are provided above the lower cross beam 2 .

[0047] In the preferred embodiment, the crane support 110 includes a crane bracket 109, and a plurality of crane diagonal braces 101 are provided between the crane bracket 109 and the lower cross beam 2, and the crane diagonal braces 101 are connected to the embedded parts A on the lower cross beam 2;

[0048] A column B111 is provided between the crane bracket 109 and the lower cross beam 2, and the anchor rod 104 passes through the crane bracket 109 and the column B111 from top to bottom and is connected to the lower cross beam 2 below.

[0049] In the preferred embodiment, an embedded part 103 is provided between the column B111 and the lower cross beam 2, a distribution beam B108 is provided above the crane bracket 109, and a distribution beam A107 is provided at the top of the column A106 above the distribution beam B108.

[0050] In the preferred embodiment, the side main beam bracket 3 includes a main beam bracket 301, and a plurality of main beam diagonal braces 302 are provided between the main beam bracket 301 and the lower cross beam 2;

[0051] The main beam diagonal brace 302 is connected to the embedded part D on the lower cross beam 2, and one end of the main beam bracket 301 is connected to the embedded part C in the damper pad stone 201.

[0052] In the preferred embodiment, one end of the main beam support 301 close to the damper pad stone 201 is provided with a threaded steel bar 307 penetrating the damper pad stone 201 , and the threaded steel bar 307 is used to tighten the main beam support 301 on both sides of the damper pad stone 201 .

[0053] Example 2

[0054] Further illustrate with reference to Example 1, Figure 1-24 The structure shown is a method for constructing an asymmetric double-sided I-beam composite composite beam cable-stayed bridge superstructure, the method comprising:

[0055] S1. During the construction of the upper tower column of the cable tower, a tower crane is used to erect the tower area support 1;

[0056] S2. Use the tower crane and special lifting device 16 to assemble the 0# beam section cross beam and small longitudinal beam of the tower area;

[0057] S3. Use a tower crane to install the first bridge crane 502, conduct a load test, and conduct acceptance inspection of the bridge crane 502;

[0058] S4. Use the first bridge crane 502 and special hoist 16 to install the side main beam of the 0# beam section and adjust the position accurately;

[0059] After the S5 and 0# beam sections are precisely adjusted, they are connected to the cross beams, the supports are installed, the supports are grouted, and the 0# beam sections are temporarily consolidated with the cable towers;

[0060] S6. Use the first bridge crane 502 to install the 1# beam segment. After the 1# beam segment is installed, remove the tower area bracket 1 and detach it from the bracket system;

[0061] S7, using the first bridge crane 502 to install the second bridge crane 502;

[0062] S8, two bridge cranes 502 symmetrically cantilever the 2# beam section and move to the 2# beam section;

[0063] S9, using the bridge crane 502 to install the lifting station 9, install the beam transport trolley track and beam transport trolley, and install the mobile steel beam construction anti-falling platform;

[0064] S10. Two bridge cranes 502 symmetrically suspended the remaining beam sections according to the standard cycle construction and completed the installation of the middle span closure section.

[0065] like Figure 1-2 As shown, in the preferred solution, in step S1, during the construction of the lower cross beam 2 of the cable tower, relevant embedded parts A, embedded parts B, embedded parts C and embedded parts D are pre-embedded according to the bracket design drawings, and a damper pad stone 201 and a support pad stone 202 are provided on the lower cross beam 2;

[0066] The tower support 1 includes a crane support 110 and a plurality of side main beam brackets 3 . The crane support 110 is arranged in the middle of the lower cross beam 2 , and the side main beam brackets 3 are symmetrically arranged on both sides of the crane support 110 .

[0067] The function of the bridge crane is to support and assemble the steel beams, assemble and anchor the bridge crane 502, and the function of the side main beam bracket 3 is to support and position the side main beam;

[0068] Improve temporary passages, guardrails, warning signs and other safety protection facilities, and inspect the scaffolding.

[0069] like Figure 1-2 As shown, in the preferred embodiment, the crane support 110 includes a crane bracket 109, a plurality of crane diagonal braces 101 are provided between the crane bracket 109 and the lower beam 2, the crane diagonal braces 101 are connected to the embedded part A on the lower beam 2, a column B111 is provided between the crane bracket 109 and the lower beam 2, and the anchor rod 104 passes through the crane bracket 109 and the column B111 from top to bottom in sequence and is connected to the lower beam 2 below;

[0070] An embedded part 103 is also provided between the column B111 and the lower cross beam 2, a distribution beam B108 is also provided above the crane bracket 109, and a distribution beam A107 is provided at the top of the column A106 above the distribution beam B108;

[0071] The side main beam bracket 3 includes a main beam bracket 301, a plurality of main beam diagonal braces 302 are arranged between the main beam bracket 301 and the lower cross beam 2, the main beam diagonal braces 302 are connected to the embedded parts D on the lower cross beam 2, and one end of the main beam bracket 301 is connected to the embedded parts C in the damper pad stone 201;

[0072] One end of the main beam support 301 close to the damper pad stone 201 is provided with a threaded steel bar 307 penetrating the damper pad stone 201 , and the threaded steel bar 307 is used to tighten the main beam support 301 on both sides of the damper pad stone 201 .

[0073] like Figure 2-4 As shown, in the preferred solution, in step S2, the center line of the steel beam 4 to be installed is released on the tower area bracket 1, and according to the designed elevation and cross slope of the steel beam 4, a pad is set on the top distribution beam A107 of the tower area bracket 1 and the height is adjusted;

[0074] When installing the steel beam 4, first install the middle segment 401, and then hoist the end segment 402 to align and connect with the steel beam 4. After the installation is completed, the installation position of the steel beam 4 is reviewed and fine-tuned if necessary. After the inspection is qualified, the steel beam 4 is temporarily limited;

[0075] Install the small longitudinal beams in order to complete the connection between the small longitudinal beams and the steel cross beam 4;

[0076] The steel beam 4 is asymmetrical, with the middle being high and the two sides being low. The highest point of the steel beam 4 is taken as the midpoint, and the hypotenuse on one side is greater than the hypotenuse on the other side. The slopes of the hypotenuse on both sides are both 2%, but the highest point is not in the center, resulting in an asymmetrical structure on both sides.

[0077] A transverse corbel 405 is also provided below the steel beam 4 and on one side of the support pad stone 202 .

[0078] In the preferred embodiment, in step S2, the special lifting device 16 includes a shoulder pole beam 6, the shoulder pole beam 6 is provided with a plurality of slidable sliding seats 7, a hook assembly 8 is provided below the sliding seat 7, and a connecting member 706 is provided between the hook assembly 8 and the sliding seat 7;

[0079] The shoulder pole beam 6 is made of cast steel and is provided with a plurality of first adjustment holes 601;

[0080] The sliding seat 7 includes a sliding sleeve 701, and side wing plates 702 are symmetrically arranged on both sides of the sliding sleeve 701. A top connecting plate 705 is arranged above the side wing plates 702, and an upper connecting hole is arranged on the top connecting plate 705, and the connecting hole is used to connect the upper crane;

[0081] A bottom connecting plate 703 is provided below the side wing plates 702, and a lower connecting hole is provided on the bottom connecting plate 703. A through latch hole is also provided on one side of the side wing plate 702, and a first latch 704 is provided in the latch hole. The first latch 704 is used to penetrate the sliding seat 7 and the shoulder pole beam 6 to limit the movement of the sliding seat 7.

[0082] The hook assembly 8 includes a hook crossbeam 801, a hook connection portion 802 is provided above the hook crossbeam 801, the hook connection portion 802 is used to connect with the bottom connection plate 703, a connection member 706 is arranged between the hook connection portion 802 and the bottom connection plate 703, the material of the connection member 706 is a steel wire rope, and a plurality of second adjustment holes 803 are provided on the side of the hook crossbeam 801;

[0083] Both ends of the hook beam 801 are provided with detachable hooks 805, which are Y-shaped and clamped on the hook beam 801. A plurality of latches are provided between the hook 805 and the hook beam 801. A long hole is provided at the upper end of the hook 805. Anti-slip grooves 804 are provided on the upper sides of the two ends of the hook beam 801, and anti-slip pins 808 are provided between the long hole and the anti-slip groove 804.

[0084] A plurality of through pin holes are provided on one side of the hook 805, and the pin holes are arranged coaxially with the second adjustment hole 803. A jaw 806 is provided below the hook 805, and an anti-slip plate 807 is provided above the lower end of the jaw 806. The anti-slip plate 807 is a steel plate with grooves.

[0085] In the preferred solution, in step S3, the position edge line of the main components of the bridge crane 502 is marked above the tower support 1, the guide rail 505 and the slider 504 are installed on one side of the tower support 1, the crane base 501 is first hoisted onto the slider 504 for installation, and then the bridge crane 502 is installed on the crane base 501;

[0086] A first push rod 503 is provided below the crane base 501, a second push rod 506 is provided on one side of the first push rod 503, and an anchor seat 507 is symmetrically provided in the middle of the crane base 501;

[0087] Then, a propulsion cylinder 508 is installed on one side of the slider 504 near the center of the upper beam 2, and the difference in the formation of the propulsion cylinders 508 on the two guide rails 505 does not exceed 50 mm;

[0088] When the bridge crane 502 moves to the designated position edge, the bridge crane 502 is effectively anchored to the bracket through the anchor seat 507 .

[0089] In the preferred solution, in step S4, the installed bridge crane 502 is used to hoist the middle side main beam 308 using the special hoist 16. After the middle side main beam 308 is hoisted to the middle position, the middle side main beam 308 is adjusted to the correct position using a hand winch;

[0090] Then install the side main beams 309 on both sides in turn, tighten the high-strength bolts on the side main beams, connect the side main beams 309 on both sides with the middle side main beam 308 into a whole, and a steel strand 403 is also provided between the middle side main beam 308 and the lower cross beam 2, and the steel strand 403 runs through the support pad stone 202 and the lower cross beam 2;

[0091] A rigid link 407 is also provided between the side main beam 309 and the damper pad 201, and damping connectors 406 are provided at both ends of the rigid link 407. The rigid link 407 is used to limit the longitudinal movement of the side main beam;

[0092] Transverse stoppers (404) are also provided between the two sides of the side main beam (309) and the cable tower to limit the lateral movement of the side main beam;

[0093] In step S5, high-strength bolts are tightened between the side main beam and the steel cross beam (4) to connect the side main beam and the steel cross beam (4), and the construction of the 0# beam section steel beam of the tower area is completed. Then, the support is installed and the support is grouted;

[0094] During the construction, temporary three-way constraints were applied to the steel beam and cable tower of the 0# beam section, completing vertical constraints, longitudinal constraints and transverse constraints respectively, so as to achieve temporary consolidation between the steel beam and the cable tower.

[0095] In step S10, when the middle span is closed, after the closing is completed by the temperature closing method, the three-way constraint is released, that is, the anchoring of the steel strand (403) and the middle side main beam (308) is loosened, the rigid connecting rod (407) is replaced by a longitudinal damper, and the transverse block (404) is removed.

[0096] In the preferred solution, in step S4, the installed bridge crane 502 is used to hoist the middle side main beam 308 using the special hoist 16. After the middle side main beam 308 is hoisted to the middle position, the middle side main beam 308 is adjusted to the correct position using a hand winch;

[0097] Then install the side main beams 309 on both sides in turn, tighten the high-strength bolts on the side main beams, connect the side main beams 309 on both sides with the middle side main beam 308 into a whole, and provide an embedded part E408 between the middle side main beam 308 and the lower cross beam 2, and provide a top fastener 409 between the embedded part E408 and the middle side main beam 308;

[0098] A rigid connecting rod 407 is also provided between the side main beam 309 and the damper pad 201. One end of the rigid connecting rod 407 is connected to the embedded part E408, and a damping connecting part 406 is provided between the other end and the side main beam 309. The rigid connecting rod 407 is used to limit the longitudinal movement of the side main beam.

[0099] In step S10, when the middle span is closed, the top-pushing joint method is adopted. First, the high-strength bolts of the top fixing (409) of the top-pushing side cable tower and the middle side main beam (308) are loosened, and a jack is inserted into the top-pushing member. After the top-pushing side is butted and joined with the other side, the three-way constraint of the other side is released.

[0100] In the preferred embodiment, in step S9, a front adjusting pad 904 is provided between the bottom of the lifting station 9 and the side main beam, and a rear adjusting pad 906 is provided between the bottom of the lifting station 9 and the steel beam. The front adjusting pad 904 and the rear adjusting pad 906 are used to cope with the construction impact caused by the asymmetric steel beam 4 and the longitudinal slope of the bridge deck.

[0101] In the preferred solution, in step S10, according to the monitoring instruction, the 10# beam section 12 and the 11# beam section 13 are constructed, and the corresponding inclined cables are tensioned. In order to pre-elevate the 12# beam section 14 on the auxiliary pier 15 by 15 cm, the cable force is adjusted in advance from the 101# beam section 12 and the 11# beam section 13, and the cable force is over-tensioned;

[0102] Install a construction platform on the top of auxiliary pier 15 in advance, place the fixed seat 1501 on the pad stone, place the temporary support 1503 on the top of the pier, the bridge crane 502 stands on the 11# beam section 13, install the 12# beam section 14 steel beam, and a cable stay;

[0103] Install the 12# beam section 14 bridge deck, wet-cast the joints, and when the strength is equal, tension the 10# beam section 12 and 11# beam section 13 inclined cables, tension the 12# beam section 14 inclined cables twice, and continue to construct the remaining beam sections according to the monitoring instructions until the middle span is closed.

[0104] After the concrete wet joint pouring of the middle span joint section is completed, the top of the auxiliary pier 15 is forced to move, the top of the support is connected to the main beam, the jack 1502 lifts the main beam, the temporary support 1503 is withdrawn, the jack 1502 returns oil to unload the force, and after the main beam falls back to the theoretical elevation, the temporary support 1503 is used for support, the support is grouted, the fixed seat 1501 is stressed, and the weighted concrete is poured. A construction platform and a lift are also provided on one side of the pier body 1504.

[0105] Example 2

[0106] Further described in conjunction with Example 1, in step S6, the first bridge crane 502 symmetrically and staggeredly installs the side span 1# beam section and the side main beam of the middle span 1# beam section;

[0107] Use the bridge crane 502 to install the cross beams from far to near in sequence, and then install the small longitudinal beams section by section. After all the steel beams of the 1# beam section are installed, install the inclined cables and perform the first tensioning symmetrically;

[0108] The first bridge crane 502 moved 9.25m to the side span, moved to the 1# beam section on the side span and anchored it, and installed 12 bridge decks of the 0# and 1# beam sections on the middle span. The first bridge crane 502 moved 28m to the middle span, moved to the 1# beam section on the middle span and anchored it, and installed 12 bridge decks of the 0# and 1# beam sections on the side span. The wet joints of the bridge decks of the 0# and 1# beam sections were cast, and after their strength met the requirements, the secondary tensioning of the cable was carried out;

[0109] The tower section support 1 is removed, and the steel beam is completely separated from the tower section support 1.

[0110] In step S8-S9, the bridge crane is used to symmetrically install the steel beam of the 2# beam section. After the steel beam is installed, one inclined cable is installed, the bridge deck of the 2# beam section is installed, and the wet joint casting of the 2# beam section is completed. After the strength is equal, two 2# inclined cables are installed, and the bridge deck

[0111] The crane 502 moves forward to the 2# beam section and anchors it. The crane moves forward to the 2# beam section and anchors it.

[0112] Use the bridge crane 502 to install the lifting station 9 in the order of component installation. The lifting station 9 is a special equipment for lifting beams and slabs to the bridge deck. Use the bridge crane 502 to install the bridge deck beam transport track and rail trolley in the order of component installation. They are used to transport beams and slabs on the bridge deck. Use the bridge crane 502 to install a mobile steel beam construction anti-fall platform, which is used for high-strength bolt construction platform and anti-fall platform.

[0113] In step S10, two bridge cranes 502 symmetrically suspend the remaining beam segments. The bridge crane 502 stands at the N segment and hoists the N+1 segment steel beam. After the steel beam is installed, one N+1 segment inclined cable is installed, the N+1 segment bridge deck is hoisted, and the N+1 segment bridge deck wet joint is cast. After the strength is equal, two N+1 segment inclined cables are installed. The bridge crane 502 moves to the N+1 segment and anchors it, and hoists the N+2 segment. This cycle continues until the construction reaches the middle span joint.

[0114] Control the temporary load on the bridge face to ensure symmetrical arrangement and prevent large changes in the temporary load on the bridge face. Accurately adjust the beam sections on both sides of the joint mouth at the same time to make the elevation difference of the symmetrical control points of the beam sections on both sides meet the requirements. Then, hang hand winches on the side main beams near the cross beams to cross and diagonally pull the main beams on both sides to make them relatively fixed in the horizontal position. Continuously observe for 36 hours to measure the centerline deviation of the upstream and downstream steel main beams, the relative height difference of the joint mouth and the segment distance, determine the joint operation time period, determine the length of the joint section beam at the joint temperature, and determine the matching cutting amount;

[0115] When the temperature is low and the length of the joint mouth is greater than the length of the joint section, the side main beam of the joint section is hoisted in. During the hoisting, the bridge cranes on both sides of the joint mouth are operated synchronously. One end of the side main beam is first connected with the high-strength bolts of the main beam on one side. The axis deviation of the joint mouth is adjusted by diagonal pulling and other measures to meet the joint requirements. When the joint temperature reaches, the joint section is accurately adjusted, and the main beam at the other end of the side main beam is quickly matched. Punches are driven in and high-strength bolts are connected. After the side main beam is closed, the cross beam and small longitudinal beam are installed in turn to complete the steel beam closure. The bridge deck is installed, the wet joint is poured, and the final closure is completed.

[0116] Embodiment 3, combined Figure 13-14As shown, it is further explained that in step S10, the length of the steel beam of the joint section is selected according to the design theoretical value. When the joint is closed, the main beam of the joint section is fed in by applying a jacking force at both ends of the main beam and adjusting the width of the joint opening. This method does not need to change the size of the steel beam of the joint section, and reduces the impact of the inconsistency between the joint temperature and the design reference temperature on the structural system after the bridge is completed. However, the on-site construction organization is more difficult, and the jacking force increases with the increase of the span, and the local bearing capacity of the structure needs to be verified;

[0117] The jack position is reserved in advance for jacking at the 13# pier in combination with the tower beam constraint. The structures of the 12# pier and the 13# pier are different. After the side span construction is completed and before the middle span is closed, the first jack 410 is inserted into the corresponding position of the 13# pier. The first jack 410 applies force according to the monitoring instruction. After the first jack 410 is stressed, the connection between the top fastener 409 and the damping connector 406 is cut off, as well as the upper connecting bolts, such as the steel strand 403 and the top fastener 409 used for the connection of the side main beam, to complete the force conversion;

[0118] At this time, the first jack 410 is used to maintain the balance state. When closing the joint, the joint section is first hoisted up and connected with the 12# pier. The length of the joint mouth should be greater than the designed beam length. According to the continuous observation of the changes in the joint mouth, the closing time is mastered, and the first jack 410 is operated to keep the length of the joint mouth greater than the designed beam length. After connecting with the 12# pier first, the jack is operated to push the 13# pier beam to connect with the middle span joint section.

[0119] Embodiment 4, as Figure 16-19 As shown, it is further explained that when the special lifting device 16 lifts the side main beam and the steel beam 4, first pull out the hook 805 on one side of the hook beam 801 and the two pins in the second adjustment hole in the hook beam 801. At this time, only the anti-slip pin 808 is subjected to force and can slide freely in the anti-slip groove 804 for adjustment. The jaw 806 under the hook assembly is adjusted to the required position, and the pin is reinserted into the hook 805 and the hook beam 801 for fixation. The gap adjustment between the hooks on both sides can be completed, which is convenient for lifting I-beams of different widths.

[0120] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A double-sided I-beam composite beam cable-stayed bridge tower support system, characterized by: The tower section support (1) comprises a crane support (110) and a plurality of side main beam brackets (3), the crane support (110) being arranged in the middle of the lower cross beam (2), and the side main beam brackets (3) being symmetrically arranged on both sides of the crane support (110); The function of the bridge deck crane is to support and assemble the steel cross beams, assemble and anchor the bridge deck crane (502), and the function of the side main beam bracket (3) is to support and position the side main beam.

2. According to claim 1, a double-sided I-beam composite cable-stayed bridge tower support system is characterized by: The lower cross beam (2) is provided with embedded parts A, embedded parts B, embedded parts C and embedded parts D; A damper pad stone (201) and a support pad stone (202) are provided above the lower cross beam (2).

3. According to claim 1, a double-sided I-beam composite cable-stayed bridge tower support system is characterized by: The crane support (110) comprises a crane bracket (109), a plurality of crane diagonal braces (101) are provided between the crane bracket (109) and the lower crossbeam (2), and the crane diagonal braces (101) are connected to embedded parts A on the lower crossbeam (2); A column B (111) is provided between the crane bracket (109) and the lower cross beam (2), and the anchor rod (104) passes through the crane bracket (109) and the column B (111) in sequence from top to bottom and is connected to the lower cross beam (2) below.

4. According to claim 3, a double-sided I-beam composite cable-stayed bridge tower support system is characterized by: An embedded part (103) is also provided between the column B (111) and the lower cross beam (2), a distribution beam B (108) is also provided above the crane bracket (109), and a distribution beam A (107) is provided at the top of the column A (106) above the distribution beam B (108).

5. According to claim 1, a double-sided I-beam composite cable-stayed bridge tower support system is characterized by: The side main beam bracket (3) comprises a main beam support (301), wherein a plurality of main beam diagonal braces (302) are provided between the main beam support (301) and the lower cross beam (2); The main beam diagonal brace (302) is connected to the embedded part D on the lower cross beam (2), and one end of the main beam bracket (301) is connected to the embedded part C in the damper pad stone (201).

6. According to claim 5, a double-sided I-beam composite cable-stayed bridge tower support system is characterized by: One end of the main beam support (301) close to the damper pad stone (201) is provided with a threaded steel bar (307) penetrating the damper pad stone (201), and the threaded steel bar (307) is used to tighten the main beam support (301) on both sides of the damper pad stone (201).

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