A method for installing a bridge hinge bearing

Abstract

The present invention discloses a method for installing a bridge hinge bearing, which includes the following steps: S1: Before installing the steel box girder, the lower steel plate of the hinge bearing is butt-jointed with the embedded steel plate bolts on the top surface of the abutment and temporarily fixed with bolts; S2: When installing the steel box girder, first position the steel box girder and measure and adjust it in place, and then spot-weld and fix the steel box girder to the upper steel plate of the hinge bearing; S3: Remove the temporary fixing bolts of the lower steel plate, lift the steel box girder together with the hinge bearing to the top surface of the abutment back wall, so as to form a construction space for the connection weld between the bottom plate of the steel box girder and the upper steel plate of the hinge bearing; S4: Full-weld the upper steel plate of the hinge bearing of the steel box girder and the hinge bearing to complete the welding construction; S5: Finally, the steel box girder and the hinge bearing are integrally lowered and positioned, and the connection bolts of the lower steel plate are tightened to complete the installation. It expands the welding construction space, improves the working conditions, has high construction efficiency, and improves the construction safety; it solves the problem that it is impossible to construct efficiently and safely due to the limited space between the steel box girder and the hinge bearing.

Description

Technical Field

[0001] The invention relates to the technical field of municipal bridge construction, and in particular to a method for installing a bridge hinge support. Background Art

[0002] Traditional installation processes mainly include the overall installation method after welding the box beam and the support, and the method of installing the support and box beam on site first and then welding. The overall installation method has the problem of bolt hole docking error and may not be installed due to component processing error and on-site construction error.

[0003] The method of installing first and then welding generally involves installing the hinge support in place first, and then welding the connecting welds after the steel box girder is installed in place. Due to the limitation of welding space, the welding quality cannot be guaranteed, and the welding construction conditions are extremely poor, which is not convenient for construction and cannot guarantee the safety of welding personnel. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a method for installing a bridge hinge support, which expands the welding construction space, improves the working conditions, increases the construction efficiency, and improves the construction safety.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The bridge hinge support installation method comprises the following steps:

[0007] S1: Before installing the steel box girder, the steel plate under the hinged support was connected to the pre-buried steel plate bolts on the top of the abutment and temporarily fixed with bolts;

[0008] S2: When installing the steel box girder, first put the steel box girder in place and measure and adjust it to the right position, then spot weld the steel box girder and the steel plate on the hinge support to fix it;

[0009] S3: Remove the temporary fixing bolts of the lower steel plate, lift the steel box girder connecting hinge support to the top surface of the abutment back wall, so as to form a construction space for the connection weld between the bottom plate of the steel box girder and the upper steel plate of the hinge support;

[0010] S4: Fully weld the steel plate on the hinge support of the steel box girder and the hinge support to complete the welding construction;

[0011] S5: Finally, the steel box girder and the hinged support are lowered into place as a whole, and the lower steel plate connecting bolts are tightened to complete the installation.

[0012] Further:

[0013] Before the step S1, embedded steel plates and bolts are installed: during the construction of the abutment cap, embedded steel plates and bolts are installed, and the upper structure bridge is installed after the abutment cap concrete is poured and cured to reach the designed strength.

[0014] In the S1 step, pre-installation of the hinge support: After the cap concrete curing reaches the design strength, clean the top surface of the cap and re-measure the embedded steel plates, re-measure and set out the installation line of the support, and then install the plate rubber support; then install the lower half of the hinge support composed of the lower steel plate of the hinge support and the bearing lower vertical plate on the plate rubber support, accurately adjust to make the embedded bolts located in the middle of the long hole bolt holes of the lower steel plate of the hinge support, and tighten the nuts for fixation; manually lift the upper half of the hinge support composed of the upper steel plate of the hinge support and the bearing upper vertical plate, accurately adjust its position to be accurate and align the pin holes of the bearing upper and lower vertical plates, and then insert the pin shaft.

[0015] In the S2 step, pre-assembly of the steel box girder: Use a crane to hoist the steel box girder into position, measure and locate the plane position and elevation of the steel box girder deck, and after accurately adjusting to the position, spot-weld the upper steel plate of the hinge support and the bottom plate of the steel box girder.

[0016] In the S3 step, lifting of the steel box girder and the hinge support: Remove the nuts on the lower steel plate of the hinge support, use a crane to lift the steel box girder and the hinge support to the top surface of the abutment back wall, and move the whole steel box girder in the direction away from the back wall to leave a standing space for the welding operator.

[0017] In the S4 step, welding of the steel box girder and the hinge support: The welding operator stands on the cap and performs full welding on the four-sided fillet welds between the upper steel plate of the hinge support and the bottom plate of the steel box girder, and welds the two supports at the same time.

[0018] In the S5 step, overall lowering and positioning: After welding is completed and the welds are inspected and qualified, slowly lower the connection body of the steel box girder and the hinge support. When it is above the top surface of the plate rubber support, accurately align the bolt holes of the lower steel plate of the hinge support with the embedded bolts. After ensuring that all bolts are aligned, slowly lower it in place and tighten the nuts to complete the installation.

[0019] Move the whole steel box girder 40 - 60 cm in the direction away from the back wall.

[0020] A set of steel pipes for temporarily supporting the steel box girder are provided on the top surface of the cap.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The installation method of the bridge hinge support is reasonably designed. First, the hinge support and the steel box girder are spot-welded and fixed at the positioning points, then lifted and fully welded, and then the beam is lowered and installed in place. It expands the welding construction space, improves the working conditions, is highly efficient in construction, and improves the construction safety; it solves the problem that it is impossible to construct efficiently and safely due to the limited space between the steel box girder and the hinge support. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following briefly describes the content expressed in each drawing of this specification and the marks in the drawings:

[0024] Figure 1 This is a schematic cross-sectional view of the bridge hinge bearing of the present invention.

[0025] Figure 2 This is a schematic longitudinal-sectional view of the bridge hinge bearing of the present invention.

[0026] Figure 3 and Figure 4 This is a schematic view of the installation of the embedded steel plate and bolts of the present invention.

[0027] Figure 5 and Figure 6 This is a schematic view of the pre-assembly of the steel box girder of the present invention.

[0028] Figure 7 and Figure 8 This is a schematic view of the pre-installation of the bearing of the present invention.

[0029] Figure 9 and Figure 10 This is a schematic view of the lifting of the steel box girder and the bearing of the present invention.

[0030] Figure 11 and Figure 12 This is a schematic view of the welding of the steel box girder and the bearing of the present invention.

[0031] Figure 13 and Figure 14 This is a schematic view of the in-place under the whole of the present invention.

[0032] In the figure:

[0033] 1 - abutment cap, 2 - abutment block, 3 - abutment back wall, 4 - embedded steel plate of abutment, 5 - connecting bolt, 6 - rubber bearing, 7 - lower steel plate of hinge bearing, 8 - bearing vertical plate of hinge bearing, 9 - hinge pin of hinge bearing, 10 - upper steel plate of hinge bearing, 11 - steel box girder. Specific embodiments

[0034] The following is a further detailed description of the specific embodiments of the present invention with reference to the accompanying drawings and through the description of the embodiments.

[0035] As Figures 1 to 2 shown, the installation structure of the bridge hinge bearing includes an abutment cap 1, an abutment block 2, an abutment back wall, 3 an embedded steel plate 4 of the abutment, a connecting bolt 5, a rubber bearing 6, a lower steel plate 7 of the hinge bearing, a bearing vertical plate 8 of the hinge bearing, a hinge pin 9 of the hinge bearing, an upper steel plate 10 of the hinge bearing, and a steel box girder 11.

[0036] Among them, the hinge support consists of a pre-embedded steel plate of the abutment, connecting bolts, a rubber bearing, a lower steel plate of the hinge support, a load-bearing vertical plate of the hinge support, a hinge support pin shaft, and an upper steel plate of the hinge support. The pre-embedded steel plate of the abutment is a Q355C steel plate with dimensions of 600×600×30mm, and HRB400φ25 anchor bars are arranged at the bottom of the steel plate. The connecting bolts are 45# steel M20×105 bolts, and 6 bolts are set for each bearing.

[0037] The rubber bearing is a 250×250×43mm sliding type rubber bearing. The lower steel plate of the hinge support is a Q355C steel plate with dimensions of 500×500×30mm. The bolt perforation uses long-hole bolt holes to ensure a displacement of ±40mm in the longitudinal direction of the bridge. The lower steel plate of the hinge support is connected to the pre-embedded steel plate of the abutment cap by bolts.

[0038] The load-bearing vertical plate of the hinge support is made of Q355C steel plate with t = 20mm. Two upper vertical plates and two lower vertical plates are set for each hinge support. The hinge support pin shaft is 45# steel φ60×320mm, and a 304# stainless steel stop shaft plate with dimensions of 60×30×20mm is set at the penetrated end of the pin shaft.

[0039] The upper steel plate of the hinge support is a Q355C steel plate with dimensions of 400×400×30mm, and the upper steel plate is connected to the bottom plate of the steel box girder by welding. The support structure of the bearing is the abutment, which consists of an abutment cap, an abutment block, and an abutment back wall. The abutment is a reinforced concrete structure. The steel box girder is a box-type bridge span structure made of Q355C steel.

[0040] The installation method of the bridge hinge support of the present invention includes the following steps:

[0041] S1: Before installing the steel box girder, butt-connect the lower steel plate of the hinge support and the pre-embedded steel plate on the top surface of the abutment with bolts and temporarily fix them with bolts;

[0042] S2: When installing the steel box girder, first position the steel box girder and measure and adjust it in place, and then perform spot welding connection and fixation between the steel box girder and the upper steel plate of the hinge support;

[0043] S3: Remove the temporary fixing bolts of the lower steel plate, lift the steel box girder together with the hinge support to the top surface of the abutment back wall, so as to form a construction space for the connection weld between the bottom plate of the steel box girder and the upper steel plate of the hinge support;

[0044] S4: Full-weld the upper steel plate of the steel box girder and the hinge support to complete the welding construction;

[0045] S5: Finally, the steel box girder and the hinge support fall in place as a whole, and tighten the connection bolts of the lower steel plate to complete the installation.

[0046] The installation method of the bridge hinge bearing of the present invention is reasonably designed. First, the hinge bearing is spot-welded and fixed at the positioning point of the steel box girder, then lifted for full welding, and then the beam is lowered for positioning and installation. It expands the welding construction space, improves the working conditions, is highly efficient in construction, and improves the construction safety; it solves the problem that it is impossible to construct efficiently and safely due to the limited space between the steel box girder and the hinge bearing.

[0047] As Figures 3 to 14 shown, the preferred specific example of the present invention is:

[0048] The installation construction process of the bridge hinge bearing includes the following steps:

[0049] Step 1: Installation of embedded steel plates and bolts: During the construction of the abutment cap, the embedded steel plates and bolts are embedded and installed. After the cap concrete is poured and cured to reach the design strength, the upper structure bridge is installed.

[0050] Step 2: Pre-installation of the hinge bearing: After the cap concrete is cured to reach the design strength, the top surface of the cap is cleaned and the embedded steel plates are re-measured. The bearing installation line is re-measured and lofted, and then the plate rubber bearing is installed; then the lower half of the hinge bearing composed of the lower steel plate of the hinge bearing and the bearing lower vertical plate is installed on the plate rubber bearing, and it is accurately adjusted so that the embedded bolts are located in the long hole bolt holes of the lower steel plate of the hinge bearing, and the four corner nuts are tightened for fixation; the upper half of the hinge bearing composed of the upper steel plate of the hinge bearing and the bearing upper vertical plate is manually lifted, and it is accurately adjusted to make its position accurate and the pin holes of the upper and lower bearing vertical plates aligned, and then the pin shaft is inserted.

[0051] Step 3: Pre-assembly of the steel box girder: The steel box girder is hoisted and positioned by a crane. The plane position and elevation of the steel box girder bridge deck are measured and positioned. After accurate adjustment, the upper steel plate of the hinge bearing and the bottom plate of the steel box girder are spot-welded and fixed at the four corners.

[0052] Step 4: Lifting of the steel box girder and the hinge bearing: The four corner nuts on the lower steel plate of the hinge bearing are removed, and the steel box girder and the hinge bearing are lifted by a crane to the top surface of the abutment back wall, and the steel box girder is moved 50 cm in the direction away from the back wall as a whole to leave a standing space for the welding operator.

[0053] Step 5: Welding of the steel box girder and the hinge bearing: The welding operator stands on the cap to perform full welding on the four-sided fillet weld between the upper steel plate of the hinge bearing and the bottom plate of the steel box girder. Two operators weld two bearings simultaneously as soon as possible to complete the welding; to ensure the safety of the welding operator, two steel pipes are set on the top surface of the cap to temporarily support the steel box girder.

[0054] Step 6: Overall lowering and positioning: After the welding is completed and the weld is inspected and qualified, the steel box girder and the hinge bearing connection body are slowly lowered. When it is above the top surface of the plate rubber bearing, the bolt holes of the lower steel plate of the hinge bearing are accurately aligned with the embedded bolts. After ensuring that all bolts are accurately aligned, it is slowly lowered in place.

[0055] The present invention also has the following specific features: 1. Effective guarantee of construction space: By adopting the process of pre-assembling, positioning and fixing first, then separating and implementing welding, and finally installing and positioning, the welding construction space is effectively guaranteed; 2. Visible and controllable construction quality: The entire construction process can be carried out under the supervision of operators and on-site technical quality management personnel, which is more conducive to the control of welding construction quality, thus improving the construction quality; 3. More secure construction safety: The entire construction process can be carried out under the supervision of operators and on-site safety management personnel, which is more conducive to the management of welding construction safety, thus effectively ensuring construction safety; 4. Short construction period and low construction cost: Since the welding construction space is expanded, the welding operation conditions are greatly improved, the welding construction period can be shortened, and the construction cost can be reduced.

[0056] The above is only a description of the preferred embodiments of the present invention. The above technical features can be arbitrarily combined to form multiple embodiment schemes of the present invention.

[0057] The present invention has been described exemplarily above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A method for installing a bridge hinge bearing, characterized in that: The bridge hinge support installation method comprises the following steps: S1: Before installing the steel box girder, the steel plate under the hinged support was connected to the pre-buried steel plate bolts on the top of the abutment and temporarily fixed with bolts; S2: When installing the steel box girder, first put the steel box girder in place and measure and adjust it to the right position, then spot weld the steel box girder and the steel plate on the hinge support to fix it; S3: Remove the temporary fixing bolts of the lower steel plate, lift the steel box girder connecting hinge support to the top surface of the abutment back wall, so as to form a construction space for the connection weld between the bottom plate of the steel box girder and the upper steel plate of the hinge support; S4: Fully weld the steel plate on the hinge support of the steel box girder and the hinge support to complete the welding construction; S5: Finally, the steel box girder and the hinged support are lowered into place as a whole, and the lower steel plate connecting bolts are tightened to complete the installation.

2. The bridge hinge bearing installation method according to claim 1, characterized in that: Before the step S1, embedded steel plates and bolts are installed: during the construction of the abutment cap, embedded steel plates and bolts are installed, and the upper structure bridge is installed after the abutment cap concrete is poured and cured to reach the designed strength.

3. The bridge hinge bearing installation method according to claim 2, characterized in that: In the step S1, the hinged support is pre-installed: after the concrete of the platform cap has been cured to the design strength, the top surface of the platform cap is cleaned and the embedded steel plate is re-measured, the support installation line is re-measured and laid out, and then the plate rubber support is installed; then the lower half of the hinged support consisting of the lower steel plate of the hinged support and the bearing lower vertical plate is installed on the plate rubber support, and the embedded bolts are accurately adjusted so that they are located in the middle of the long hole bolt holes of the lower steel plate of the hinged support, and the nuts are tightened to fix them; the upper half of the hinged support consisting of the upper steel plate of the hinged support and the bearing upper vertical plate is manually lifted, and accurately adjusted so that its position is accurate and the pin shaft holes of the bearing upper and lower vertical plates are aligned, and then the pin shaft is inserted.

4. The bridge hinge support installation method according to claim 3, characterized in that: In the step S2, the steel box girder is pre-assembled: the steel box girder is hoisted into place by a crane, the plane position and elevation of the steel box girder bridge deck are measured and positioned, and after precise adjustment, the steel plate on the hinge support and the bottom plate of the steel box girder are spot welded and fixed.

5. The bridge hinge support installation method according to claim 4, characterized in that: In the step S3, the steel box girder and the hinge support are lifted: the nuts on the steel plate under the hinge support are removed, and the steel box girder and the hinge support are lifted by a crane to the top surface of the abutment back wall, and the steel box girder is moved as a whole away from the back wall to leave space for the welding operator to stand.

6. The bridge hinge support installation method according to claim 5, characterized in that: In the step S4, the steel box girder is welded to the hinge support: the welding operator stands on the table cap to fully weld the four-sided fillet welds between the steel plate on the hinge support and the bottom plate of the steel box girder, and welds the two supports at the same time.

7. The bridge hinge bearing installation method according to claim 6, characterized in that: In the S5 step, the whole is lowered into place: after welding is completed and the weld is inspected and qualified, the steel box girder and the hinge support connector are slowly lowered. When lowered to above the top surface of the plate rubber support, the bolt holes of the steel plate under the hinge support are accurately aligned with the embedded bolts. After ensuring that all bolts are aligned, slowly lower it into place and tighten the nuts to complete the installation.

8. The installation method of the bridge hinge bearing according to claim 5, characterized in that: Move the entire steel box girder 40-60cm away from the back wall.

9. The bridge hinge support installation method according to claim 6, characterized in that: A group of steel pipes for temporarily supporting the steel box girder are arranged on the top surface of the platform cap.

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