Anti-overturning device for small box girder installation with anti-collision wall and construction method

Abstract

The present application relates to a kind of anti-overturning devices for small box girder installation with crash wall, it includes steel frame hoop, pull rod and locking nut, the steel frame hoop is connected on bent cap by bolt corresponding to the side of small box girder away from crash wall, the pull rod is set on the steel frame hoop, the steel frame hoop is provided with the stabilizing component of stabilizing the pull rod, the pull rod passes through the small box girder, the pull rod is provided with pad, the locking nut is threadedly cooperated on the pull rod, and the pad is located between the locking nut and the small box girder.The present application has the effect of improving small box girder construction efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of small box girder installation, in particular to a small box girder installation anti-overturning device with crash wall and a construction method. BACKGROUND

[0002] In recent years, with the vigorous development of prefabricated structures in the field of construction, the prefabricated concrete small box girder structure has been widely used in viaduct engineering projects. The crash wall and the side beam of the small box girder are integrally prefabricated and installed on the concrete bent cap, which can improve the construction efficiency of the bridge superstructure and reduce the safety risks of high-altitude construction of the crash wall on site.

[0003] The small box girder is installed in the length direction of the bent cap. The small box girder near the end of the bent cap needs to be installed with a crash wall. Due to the self-weight of the crash wall, there is an overturning force on the small box girder towards the crash wall, which makes the center of gravity of the small box girder unstable on the bent cap, causing safety hazards in the later construction of the small box girder. Therefore, a device is needed to stabilize the small box girder.

[0004] A prefabricated box girder side beam crash wall construction integrated anti-overturning support structure is disclosed in Chinese Patent No. CN205369035U. For the small box girder hoisted on the concrete support, a steel support is arranged between the small box girder flange plate on the side of the crash wall and the concrete support, so that the small box girder flange plate on the side of the steel support obtains upward support force at the bottom. A pull rod is arranged between the small box girder flange plate on the other side and the concrete support, so that the small box girder flange plate on the side of the pull rod obtains downward pressure at the top. The present utility model ensures the stability of the box girder during the integrated construction of the crash wall in the form of one pull and one support, avoids the overturning of the box girder during the construction of the crash wall, eliminates the unsafe factors in the construction of the crash wall, thereby ensuring the progress of the project and improving the quality of the project.

[0005] For the related technology in the above, in the prior art, the workers use the cooperation of the sleepers and the steel supports to support one side of the small box girder during the installation of the crash wall, and then use the cooperation of the pull rod and the nut to pull the other side of the small box girder, so as to maintain the balance of the small box girder on the bent cap. However, in the actual construction process, the workers need to pre-place the sleepers and the steel supports using the lifting appliance, and then fasten the sleepers and the steel supports using fastening means, so as to support the small box girder. However, such a setting increases the construction steps and the construction time of the small box girder, and reduces the construction efficiency of the small box girder. SUMMARY

[0006] In order to improve the construction efficiency of the small box girder, the present application provides a small box girder installation anti-overturning device with crash wall and a construction method.

[0007] The application provides an anti-overturning device for small box girder installation with a crash barrier and a construction method.

[0008] The application provides an anti-overturning device for small box girder installation with a crash barrier, which comprises a steel frame hoop, a pull rod and a locking nut.

[0009] Through the above technical scheme, when the small box girder is consolidated, the work personnel first install the steel frame hoop on the bent cap, then use the stabilizing assembly to stabilize the pull rod on the steel frame hoop, make the pull rod pass through the small box girder, set the pad on the pull rod, and rotate the locking nut to make the locking nut abut against the pad, so that the effect of consolidating the small box girder is achieved.

[0010] Optionally, the stabilizing assembly comprises a mounting cylinder, a rotating ring and a limiting block, the mounting cylinder is connected to the steel frame hoop, the top end of the mounting cylinder is provided with an opening, the rotating ring is rotationally connected to the opening of the mounting cylinder, the limiting block is connected to the opening of the mounting cylinder, the side wall of the pull rod is provided with a limiting groove, the limiting block is slidingly fitted in the limiting groove, and the rotating ring is threadedly connected to the pull rod.

[0011] Through the above technical scheme, when the pull rod is stabilized, the work personnel put the bottom end of the pull rod into the mounting cylinder, rotate the rotating ring, make the limiting block slidingly fit in the sliding groove, and then lower the pull rod until the pull rod abuts against the inner bottom wall of the mounting cylinder, so that the effect of stabilizing the pull rod is achieved.

[0012] Optionally, the pull rod comprises a fixing cylinder and a lifting rod, the lifting rod is slidingly fitted in the top end of the fixing cylinder, the limiting groove is arranged on the fixing cylinder, the locking nut is threadedly connected to the lifting rod, and the fixing cylinder is provided with a locking assembly for locking the lifting rod.

[0013] By adopting the technical scheme, the top of the small box girder and the bent cap have a high distance, a common pull rod is an integral steel rod, and the length of the pull rod needs to be considered during installation, which increases the construction difficulty of the pull rod, and the long steel rod is inconvenient to carry. The staff locks the lifting rod in the fixed cylinder by using the locking assembly, so that the lifting rod and a part of the length of the fixed cylinder overlap, thereby saving the length space of the whole pull rod, making the pull rod itself easier to carry and install, and reducing the installation difficulty of the pull rod.

[0014] Optionally, the bottom end of the pull rod is connected with a sliding block, the inner wall of the fixed cylinder is provided with a sliding groove at a position corresponding to the sliding block, the sliding block is slidingly fitted in the sliding groove, and a sealing block is connected to the top end of the fixed cylinder in the sliding groove. When the lifting rod passes through the small box girder, the sliding block abuts against the sealing block.

[0015] By adopting the technical scheme, the staff limits the moving direction of the lifting rod by using the cooperation of the sliding block and the sliding groove, reduces the possibility of rotation of the lifting rod, facilitates the subsequent operation of the locking nut, and improves the stability of the lifting rod.

[0016] Optionally, the locking assembly comprises a abutting ring, a locking block, an ejection spring, a lifting spring and a locking head. The locking block is provided on the fixed cylinder. The side wall near the bottom end of the fixed cylinder is provided with an abutting inclined surface. The locking block is connected with an abutting plate. The ejection spring is arranged in the fixed cylinder and located between the abutting plate and the fixed cylinder. The locking head is connected to the bottom end of the lifting rod. The lifting spring is arranged on the inner bottom wall of the fixed cylinder. The locking head is located above the lifting spring. When the lifting rod is locked, the abutting ring abuts against the abutting inclined surface, the locking block abuts against the locking head, and the ejection spring and the lifting spring are compressed.

[0017] By adopting the technical scheme, when the lifting rod is received, the staff presses down the lifting rod, so that the lifting spring is compressed, until the locking head is located between the locking blocks. Then the abutting ring is rotated, so that the abutting ring rises and abuts against the abutting inclined surface, the locking block moves towards the fixed cylinder, the ejection spring is compressed, until the locking block abuts against the locking head, so as to receive the lifting rod. When the lifting rod is released, the staff reversely rotates the abutting ring, the locking block reversely moves under the action of the ejection spring, until the locking block is out of the range of the locking head, the lifting rod rises under the action of the lifting spring, until the sliding block abuts against the sealing block, at this time, the lifting rod passes through the small box girder, so as to release the lifting rod.

[0018] Optionally, a chemical screw is pre-set on the bent cap, the chemical screw passes through the steel frame hoop, and a fastening nut is threadedly connected to the chemical screw and abuts against the steel frame hoop.

[0019] By adopting the technical scheme, the staff further improves the tensile strength of the steel frame hoop by cooperation of the chemical screw and the fastening nut, and reduces the possibility of deviation and damage of the steel frame hoop when the pull rod is stressed.

[0020] The construction method of the anti-overturning device for installing the small box girder with the anti-collision wall comprises the following steps: S1, installing the steel frame hoop: wrapping two parts of the steel frame hoop around the cover beam corresponding to the side of the small box girder away from the anti-collision wall, and then locking the steel frame hoop by cooperation of the bolt and the nut; S2, fastening the pull rod: putting the fixing cylinder into the installation cylinder, slidingly fitting the limiting block in the limiting groove, rotating the rotating ring to make the fixing cylinder descend until the fixing cylinder abuts against the inner bottom wall of the installation cylinder; S3, opening the counter-pulling hole on the small box girder: opening the counter-pulling hole on the small box girder at the position corresponding to the lifting rod by using a drilling tool, so that the lifting rod can pass through the counter-pulling hole; S4, loosening the lifting rod: reversely rotating the abutting ring to make the abutting ring descend, and the locking block moves under the action of the ejection spring until the locking block moves out of the range of the locking head, the locking head rises under the action of the lifting spring to make the lifting rod rise until the sliding block abuts against the sealing block, at this time, the top end of the lifting rod passes through the counter-pulling hole; S5, locking the pull rod: sleeving the pad plate on the lifting rod, and then rotating the locking nut to make the locking nut abut against the pad plate; S6, fine-tuning the angle of the small box girder: measuring the elevation and line shape of the small box girder by using an optical level gauge, and rotating the locking nut by using a tool to adjust the angle of the small box girder until the elevation and the line shape meet the requirements of construction.

[0021] By adopting the technical scheme, the staff only needs to adjust the angle of the small box girder by cooperation of the steel frame hoop, the pull rod and the locking nut, and then detects the elevation and line shape of the small box girder by using the optical level gauge, so that the elevation and line shape of the small box girder meet the requirements of construction, the operation process is simple and fast, the construction steps and construction time of the small box girder are reduced as much as possible, and the construction efficiency of the small box girder is improved; after a section of the small box girder is constructed, the staff can remove the locking nut, re-store the lifting rod by using the locking assembly, loosen the stabilizing assembly to disassemble the fixing cylinder, loosen the fastening nut, and finally disassemble the steel frame hoop, so that the anti-overturning device is used for adjusting the next section of the small box girder, and the effect of repeated use of the anti-overturning device is realized, and the consumption cost of the small box girder construction is reduced.

[0022] Optionally, before the step S2, the anti-pulling hole is opened in the cap beam by using the drilling tool, the impurities in the anti-pulling hole are cleaned, the chemical hose is placed in the anti-pulling hole, the chemical screw is placed in the anti-pulling hole and passes through the steel frame hoop, the chemical agent in the chemical hose fills the anti-pulling hole and wraps the chemical screw, the chemical screw is solidified to stabilize the chemical screw, the fastening nut is rotated on the chemical screw to abut against the steel frame hoop to improve the anti-pulling force of the steel frame hoop.

[0023] By adopting the above technical scheme, the anti-pulling hole is opened to stabilize the chemical screw, the chemical screw has strong anchoring force, no expansion stress, good anti-seismic performance, and will not damage the cap beam body, and the chemical screw can be left on the cap beam after the steel frame hoop is removed for later maintenance.

[0024] In summary, the present application has at least one of the following beneficial technical effects:

[0025] 1. When consolidating the small box girder, the worker first installs the steel frame hoop on the cap beam, then uses the stabilizing assembly to stabilize the pull rod on the steel frame hoop, makes the pull rod pass through the small box girder, sets the pad plate on the pull rod, and rotates the locking nut to abut against the pad plate, thereby achieving the effect of consolidating the small box girder. The worker only needs to use the cooperation of the steel frame hoop, the pull rod and the locking nut to stabilize the small box girder, and adjusts the angle of the small box girder by rotating the locking nut. No other technical means is needed to support the small box girder, the operation is simple and fast, the construction steps and construction time of the small box girder are reduced as much as possible, and the construction efficiency of the small box girder is improved.

[0026] 2. When stabilizing the pull rod, the worker puts the bottom end of the pull rod into the installation cylinder, rotates the rotating ring, and makes the limiting block slide and cooperate in the sliding groove. The pull rod descends until it abuts against the inner bottom wall of the installation cylinder, thereby achieving the effect of stabilizing the pull rod.

[0027] 3. When storing the lifting rod, the worker presses down the lifting rod to compress the lifting spring until the locking head is located between the locking blocks. Then the worker rotates the abutting ring to make the abutting ring rise and abut against the abutting inclined surface, so that the locking blocks move towards the fixed cylinder, the compressed spring is ejected, and the locking blocks abut against the locking head to store the lifting rod. When releasing the lifting rod, the worker reverses the abutting ring, the locking blocks are reversely moved by the ejection force of the spring, until the locking blocks are out of the range of the locking head, the lifting rod is lifted by the lifting spring until the sliding block abuts against the blocking block, at this time the lifting rod passes through the small box girder to release the lifting rod.

[0028] 4. Workers only need to use the steel frame clamps, tie rods, and locking nuts to adjust the angle of the small box girder. Then, an optical level is used to check the elevation and alignment of the small box girder to ensure that the elevation and alignment meet the construction requirements. The operation process is simple and quick, minimizing the construction steps and time of the small box girder and improving the construction efficiency. After a section of the small box girder is completed, workers can remove the locking nuts, use the locking assembly to reassemble the lifting rod, loosen the stabilizing assembly to disassemble the fixing cylinder, loosen the fastening nuts, and finally remove the steel frame clamps. The anti-tipping device can then be used for adjusting the next section of the small box girder, achieving the effect of reusing the anti-tipping device and reducing the consumption cost of small box girder construction. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the anti-overturning device for installing a small box girder with a crash barrier in this embodiment of the application.

[0030] Figure 2 This is a structural schematic diagram of the steel frame clamp, tie rod, and stabilizing components in the embodiments of this application.

[0031] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0032] Figure 4 This is a cross-sectional view used in the embodiments of this application to illustrate the structure of the stabilizing component and the locking component.

[0033] Figure 5 yes Figure 4 Enlarged view of section B in the middle.

[0034] Figure 6 This is a state diagram used in the embodiments of this application to illustrate the state when the lifting rod is stored.

[0035] Explanation of reference numerals in the attached drawings: 01, cap beam; 02, small box girder; 03, crash barrier; 1, steel frame clamp; 2, tie rod; 21, fixing cylinder; 211, sealing block; 212, limiting groove; 213, observation groove; 22, lifting rod; 221, sliding block; 3, locking nut; 31, pad; 4, chemical screw; 41, fastening nut; 5, locking assembly; 51, abutting ring; 52, locking block; 521, abutting plate; 522, abutting ramp; 53, ejection spring; 54, lifting spring; 55, locking head; 551, abutting surface; 6, stabilizing assembly; 61, mounting cylinder; 62, rotating ring; 63, limiting block. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0037] The embodiment of the application discloses a small box girder installation anti-overturning device with anti-collision walls and a construction method. Figure 1 、 Figure 2 and Figure 3 The small box girder installation anti-overturning device with anti-collision walls comprises a steel frame hoop 1, a pull rod 2 and a locking nut 3. The steel frame hoop 1 is locked on the bent cap 01 by two hoop halves through bolts, the bent cap 01 is provided with a pull-out resistant hole at a position corresponding to the small box girder 02, a chemical screw 4 is arranged in the pull-out resistant hole, the chemical screw 4 penetrates through the steel frame hoop 1, a fastening nut 41 is threadedly connected to the chemical screw 4, and the fastening nut 41 abuts against the steel frame hoop 1.

[0038] Referring to Figure 2 and Figure 4 The pull rod 2 comprises a fixed cylinder 21 and a lifting rod 22, the bottom end of the lifting rod 22 is fixedly connected with a plurality of sliding blocks 221, two sliding blocks 221 are taken as an example in the embodiment, the inner wall of the fixed cylinder 21 is provided with sliding grooves corresponding to the positions of the sliding blocks 221, the sliding blocks 221 are slidingly fitted in the sliding grooves, and the groove openings of the sliding grooves are fixedly connected with sealing blocks 211.

[0039] Referring to Figure 2 、 Figure 4 and Figure 5 A locking assembly 5 is arranged in the fixed cylinder 21, the locking assembly 5 comprises an abutting ring 51, a locking block 52, an ejection spring 53, a lifting spring 54 and a locking head 55. A plurality of locking grooves are formed in the side wall of the fixed cylinder 21, two locking grooves are taken as an example in the embodiment, the locking grooves are communicated with abutting grooves, the groove openings of the abutting grooves are fixedly connected with fixed plates, the locking block 52 is slidingly fitted in the locking grooves, the locking block 52 is fixedly connected with an abutting plate 521, the ejection spring 53 is arranged in the abutting groove and located between the side wall of the abutting groove and the abutting plate 521, and an abutting inclined surface 522 is formed in the side wall of the locking block 52 close to the bottom end of the fixed cylinder 21. The abutting ring 51 is arranged on the outer side wall of the fixed cylinder 21 and threadedly connected with the fixed cylinder 21, and the abutting ring 51 abuts against the abutting inclined surface 522. The locking head 55 is fixedly connected to the bottom end of the lifting rod 22, the locking head 55 is provided with an abutting surface 551, and the locking block 52 abuts against the abutting surface 551. The lifting spring 54 is arranged on the inner bottom wall of the fixed cylinder 21, and the locking head 55 is located above the lifting spring 54. The side wall of the fixed cylinder 21 is provided with an observation groove 213 for observing the position of the locking head 55.

[0040] Referring to Figure 4 and Figure 6When the lifting rod 22 is stored, the staff member presses the lifting rod 22 downward, so that the lifting spring 54 is compressed until the locking head 55 is located between the locking blocks 52, and then the staff member rotates the abutting ring 51 to make the abutting ring 51 rise and abut against the abutting inclined surface 522, so that the locking blocks 52 move toward the inside of the fixed cylinder 21, the ejecting spring 53 is compressed until the locking blocks 52 abut against the abutting surface 551, so as to store the lifting rod 22.

[0041] With reference to Figure 2 , Figure 4 and Figure 6 , the steel frame hoop 1 is provided with a stabilizing assembly 6, which comprises a mounting cylinder 61, a rotating ring 62 and a limiting block 63. The mounting cylinder 61 is vertically fixedly connected to the steel frame hoop 1, the top end of the mounting cylinder 61 is open, the rotating ring 62 is rotationally connected to the top end of the mounting cylinder 61, and the limiting block 63 is fixedly connected to the inner wall of the mounting cylinder 61 at a position close to the top end of the mounting cylinder 61. The outer side wall of the fixed cylinder 21 is provided with a limiting groove 212, the limiting block 63 is slidingly fitted in the limiting groove 212, and the rotating ring 62 is threadedly fitted with the fixed cylinder 21.

[0042] When the fixed cylinder 21 is stabilized, the staff member puts the bottom end of the fixed cylinder 21 into the mounting cylinder 61 and rotates the rotating ring 62, so that the limiting block 63 is slidingly fitted in the sliding groove, the fixed cylinder 21 is lowered until the fixed cylinder 21 abuts against the inner bottom wall of the mounting cylinder 61, and the effect of stabilizing the pull rod 2 is achieved.

[0043] With reference to Figure 1 and Figure 3 , the small box girder 02 is provided with a counter-pulling hole corresponding to the position of the lifting rod 22, the lifting rod 22 passes through the counter-pulling hole, the lifting rod 22 is sleeved with a pad plate 31, the pad plate 31 abuts against the top wall of the small box girder 02, a locking nut 3 is threadedly fitted at the top end of the lifting rod 22, and the locking nut 3 abuts against the pad plate 31. The staff member uses the cooperation of the locking nut 3 and the pull rod 2 to stabilize the small box girder 02.

[0044] The implementation principle of the anti-overturning device for small box girder installation with crash barrier is as follows: when the small box girder 02 is stabilized, the workers connect the two-leaf steel frame hoop 1 on the bent cap 01 through bolts, and stabilize the steel frame hoop 1 by cooperating the chemical screw 4 and the tightening nut 41, then put the bottom end of the fixing cylinder 21 into the installation cylinder 61, rotate the rotating ring 62, make the limiting block 63 slide and cooperate in the sliding groove, and lower the fixing cylinder 21 until the fixing cylinder 21 abuts against the inner bottom wall of the installation cylinder 61, so as to stabilize the pull rod 2, then reversely rotate the abutting ring 51, the locking block 52 reversely moves under the action force of the ejecting spring 53 until the locking block 52 is separated from the abutting surface 551, the lifting rod 22 is lifted under the action force of the lifting spring 54 until the sliding block 221 abuts against the sealing block 211, at this time, the lifting rod 22 passes through the small box girder 02, finally, the workers put the pad plate 31 on the lifting rod 22, and rotate the locking nut 3 until the locking nut 3 abuts against the pad plate 31, so as to stabilize the small box girder 02; when the device is removed, the workers loosen the locking nut 3, and press down the lifting rod 22, so that the lifting spring 54 is compressed until the locking head 55 is located between the two locking blocks 52, then rotate the abutting ring 51 until the abutting ring 51 is lifted and abuts against the abutting inclined surface 522, so that the locking block 52 moves towards the inside of the fixing cylinder 21, the ejecting spring 53 is compressed until the locking block 52 abuts against the abutting surface 551, so as to store the lifting rod 22, then reversely rotate the rotating ring 62 until the fixing cylinder 21 is lifted and separated from the installation cylinder 61, loosen the tightening nut 41 and the bolts on the steel frame hoop 1 in turn, and the anti-overturning device can be removed, and the next small box girder 02 is prepared for installation.

[0045] The workers only need to stabilize the small box girder 02 by cooperating the steel frame hoop 1, the pull rod 2 and the locking nut 3, and fine-tune the angle of the small box girder 02 by rotating the locking nut 3, without other technical means for supporting the small box girder 02, so that the operation is simple and fast, the construction steps and construction time of the small box girder 02 are reduced as much as possible, and the construction efficiency of the small box girder 02 is improved.

[0046] The construction method of the anti-overturning device for small box girder installation with crash barrier includes the following steps.

[0047] S1, install the steel frame hoop 1: connect the two-leaf steel frame hoop 1 on the bent cap 01 through the cooperation of bolts and nuts corresponding to the side of the small box girder 02 away from the crash barrier 03, and distribute the two-leaf steel frame hoop 1 upward and downward;

[0048] S2, install chemical screw 4: use drilling tool to open anti-pulling hole on cap beam 01, empty the impurities in the anti-pulling hole, place the chemical hose in the anti-pulling hole, pass the steel frame hoop 1 through the chemical screw 4, extend into the anti-pulling hole, and crush the chemical hose, so that the chemical agent in the chemical hose fills the anti-pulling hole and wraps the chemical screw 4, wait for the chemical agent to solidify, to stabilize the chemical screw 4, rotate the fastening nut 41 on the chemical screw 4, make the fastening nut 41 tightly abut against the steel frame hoop 1, and improve the anti-pulling force of the steel frame hoop 1;

[0049] S3, fasten the pull rod 2: put the fixing cylinder 21 into the installation cylinder 61, limit the fixing cylinder 21, rotate the rotating ring 62, the fixing cylinder 21 descends, the limiting block 63 enters the limiting groove 212 until the bottom end of the fixing cylinder 21 reaches the inner bottom wall of the installation cylinder 61;

[0050] S4, open the counter-pulling hole: open the counter-pulling hole on the top wall of the small box beam 02 corresponding to the position of the lifting rod 22, allowing the lifting rod 22 to pass through the counter-pulling hole;

[0051] S5, loosen the lifting rod 22: reverse rotate the abutting ring 51, the abutting ring 51 descends, the locking block 52 is driven by the ejection spring 53 to move the abutting plate 521 until the abutting plate 521 abuts against the fixed plate, the locking block 52 is separated from the abutting surface 551, the lifting rod 22 is lifted by the lifting spring 54 until the sliding block 221 abuts against the sealing block 211, at this time the lifting rod 22 passes through the counter-pulling hole;

[0052] S6, lock the pull rod 2: sleeve the pad 31 on the lifting rod 22, and rotate the locking nut 3 to abut against the pad 31;

[0053] S7, adjust the angle of the small box beam 02: rotate the locking nut 3 with a tool to fine-tune the angle of the small box beam 02, and use an optical level instrument to detect the elevation and alignment of the small box beam 02 until the elevation and alignment of the small box beam 02 meet the standards;

[0054] S8, consolidate the small box beam 02: after the workers weld enough connecting steel bars at the wet joint and the intermediate width small box beam 02, pour concrete, wait for the concrete to cool down, use an ultrasonic detector to detect the strength of the concrete until the strength of the concrete reaches 75%;

[0055] S9, dismounting the anti-overturning device: after the concrete strength reaches the standard, loosen the locking nut 3, and press down the lifting rod 22, so that the lifting spring 54 is compressed, until the locking head 55 is located between the two locking blocks 52, then rotate the abutting ring 51, so that the abutting ring 51 rises and abuts against the abutting inclined surface 522, so that the locking block 52 moves towards the inside of the fixed cylinder 21, the compression of the ejector spring 53 is released, until the locking block 52 abuts against the abutting surface 551, so as to store the lifting rod 22, then reverse rotate the rotating ring 62, so that the fixed cylinder 21 rises, until it is separated from the mounting cylinder 61, loosen the fastening nut 41 and the nut on the steel frame hoop 1 in turn, then the anti-overturning device can be dismounted, and the next small box girder 02 is prepared for installation.

[0056] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An anti-tipping device for installing a small box girder with a crash barrier, characterized in that: The system includes a steel frame clamp (1), a tie rod (2), and a locking nut (3). The steel frame clamp (1) is bolted to the cap beam (01) on the side of the small box girder (02) away from the crash barrier (03). The tie rod (2) is mounted on the steel frame clamp (1). A stabilizing component (6) for securing the tie rod (2) is provided on the steel frame clamp (1). The tie rod (2) passes through the small box girder (02). A pad (31) is fitted on the tie rod (2). The locking nut (3) is threaded into the tie rod. On the rod (2), the pad (31) is located between the locking nut (3) and the small box girder (02); the stabilizing component (6) includes a mounting cylinder (61), a rotating ring (62), and a limiting block (63). The mounting cylinder (61) is connected to the steel frame clamp (1), and the top end of the mounting cylinder (61) is open. The rotating ring (62) is rotatably connected to the opening of the mounting cylinder (61), and the limiting block (63) is connected to the opening of the mounting cylinder (61). The side of the pull rod (2) A limiting groove (212) is provided on the wall, and the limiting block (63) is slidably fitted in the limiting groove (212), and the rotating ring (62) is threadedly fitted with the pull rod (2); the pull rod (2) includes a fixed cylinder (21) and a lifting rod (22), the lifting rod (22) is slidably fitted at the top of the fixed cylinder (21), the limiting groove (212) is provided on the fixed cylinder (21), the locking nut (3) is threadedly fitted on the lifting rod (22), and the fixed cylinder (21) is provided with There is a locking assembly (5) for locking the lifting rod (22); the bottom end of the pull rod (2) is connected to a sliding block (221), and a sliding groove is opened on the inner wall of the fixed cylinder (21) at the position corresponding to the sliding block (221). The sliding block (221) slides in the sliding groove. A sealing block (211) is connected to the top end of the sliding groove near the fixed cylinder (21). When the lifting rod (22) passes through the small box beam (02), the sliding block (221) abuts against the sealing block (211).The locking assembly (5) includes a retaining ring (51), a locking block (52), an ejector spring (53), a lifting spring (54), and a locking head (55). Several locking blocks (52) are inserted through the fixed cylinder (21). A retaining ramp (522) is formed on the side wall of the locking block (52) near the bottom of the fixed cylinder (21). A retaining plate (521) is connected to the locking block (52). The ejector spring (53) is located inside the fixed cylinder (21) and positioned within the retaining plate (521). Between the lifting rod (22) and the fixed cylinder (21), the locking head (55) is connected to the bottom end of the lifting rod (22), the lifting spring (54) is disposed on the inner bottom wall of the fixed cylinder (21), and the locking head (55) is located above the lifting spring (54). When the lifting rod (22) is locked, the abutting ring (51) abuts against the abutting inclined surface (522), the locking block (52) abuts against the locking head (55), and both the ejecting spring (53) and the lifting spring (54) are compressed.

2. The anti-overturning device for installing a small box girder with a crash barrier according to claim 1, characterized in that: A chemical screw (4) is pre-installed on the cap beam (01). The chemical screw (4) passes through the steel frame clamp (1). A fastening nut (41) is threaded onto the chemical screw (4). The fastening nut (41) abuts against the steel frame clamp (1).

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