Continuous rigid frame bridge type beam end transverse limiting device and installation method

Abstract

The invention discloses a continuous rigid frame bridge type beam end transverse limiting device and an installation method, the device comprises a fixed end, a movable end and a steel box connecting the fixed end and the movable end, the movable end and the steel box are adjusted and fixed through the limiting devices, the limiting devices are oppositely arranged on two opposite side walls of the steel box, one sides of the limiting devices are fixed with the movable end, and the other sides of the limiting devices are fixed with the movable end. A heightening steel plate of the limiting device and the side wall surface of the steel box are limited; the method comprises the following steps that one end of the steel box is fixed to the fixed end; a limiting device of a height-adjustment-free steel plate is pre-buried at the movable end; measuring and designing a reserved gap, and selecting the thickness of the heightened steel plate; connecting the heightening steel plates; dismantling the temporary connecting device; the limiting device is adjusted to enable the height-adjusting steel plate to abut against the steel box. Height adjustment is carried out through the wedge-shaped block and the bolt structure, in the pre-embedding treatment stage, initial adjustment of the installation gap and batch production of plates are carried out, and the manufacturing cost is reduced; in the tightening stage, the lower support and the upper support are fixed through tightening bolts, and the performance of the support is guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of bridge beam end construction, and in particular relates to a continuous rigid frame bridge beam end transverse limiting device and an installation method. Background Art

[0002] Among continuous beam bridges, the bridges that integrate the pier and the main beam are called continuous rigid frame bridges. They are divided into multi-span rigid frame bridges with the main span as a continuous beam and multi-span continuous-rigid frame bridges. Both use prestressed concrete structures. The main features of the continuous rigid frame without bearings are as follows: (1) No bearings are required to avoid bearing diseases, save costs, and reduce maintenance costs in the later stage, avoiding line shutdowns caused by bearing replacement; (2) Good seismic performance. During an earthquake, the horizontal force can be evenly distributed to each pier, while continuous beam bridges require brake piers or special seismic bearings; (3) The piers and beams are directly connected, the lines are continuous and clear, the overall coordination is good, and the landscape effect is good.

[0003] Continuous steel structure bridges use flexible thin-walled piers, and adjacent beams have relative rotation angle requirements. At the same time, when the bridge is subjected to lateral horizontal forces, the displacement of adjacent beams may be asynchronous, resulting in relative displacement, causing track displacement and affecting vehicle stability. The manhole at the end of the beam is mainly used as a maintenance channel in the later stage. At present, in order to prevent the adjacent beams from relative displacement in the lateral direction, bending steel trusses are placed inside the manhole to resist the lateral displacement of the beam end and maintain the synchronization of the lateral displacement of adjacent beams. This structure is placed in the concrete of the manhole and can resist lateral displacement, but the bridge will produce rotation angles and longitudinal displacements during use, which cannot be met by this structure. Summary of the invention

[0004] The present invention is proposed to solve the problems existing in the prior art, and its purpose is to provide a continuous rigid frame bridge beam end transverse limit device and an installation method.

[0005] The technical solution of the present invention is: a transverse limiting device for the end of a continuous rigid frame bridge beam, comprising a fixed end, a movable end and a steel box connecting the two, the movable end and the steel box are adjusted and fixed by a limiting device, the limiting device is relatively arranged at two opposite side walls of the steel box, one side of the limiting device is fixed to the movable end, and the height adjustment steel plate of the limiting device is limited to the side wall of the steel box.

[0006] Furthermore, the fixed end is directly anchored to the steel box via an anchor.

[0007] Furthermore, the limiting device includes a height-adjusting reaction force seat, and the height-adjusting reaction force seat is anchored and fixed to the movable end.

[0008] Furthermore, the height-adjusting reaction force seat is provided with an intermediate seat plate, and the height-adjusting reaction force seat is also provided with a linear adjustment mechanism for adjusting the intermediate seat plate perpendicular to the direction of the height-adjusting reaction force seat.

[0009] Furthermore, the linear adjustment mechanism includes a height-adjusting wedge block, and the bottom of the intermediate seat plate forms a driven inclined surface with the same inclination as the height-adjusting wedge block.

[0010] Furthermore, the height-adjusting wedge blocks are arranged correspondingly on the left and right sides, and the bottom of the middle seat plate is V-shaped.

[0011] Furthermore, a spherical crown is arranged on the upper end of the middle seat plate, and a height-adjusting steel plate is arranged on the upper end of the spherical crown.

[0012] Furthermore, a second friction pair is formed between the middle seat plate and the ball crown.

[0013] Furthermore, a first friction pair is formed between the spherical crown and the height-adjusting steel plate.

[0014] A method for installing a lateral limit device at the end of a continuous rigid frame bridge beam comprises the following steps: A. Fix one end of the steel box to the fixed end; B. Pre-embed the limit device without height-adjustable steel plate at the movable end; C. Measure the reserved gap and choose to increase the thickness of the steel plate; D. Connect the height adjustment steel plate; E. Remove temporary connection devices; F. Adjust the limit device to raise the steel plate to press the steel box.

[0015] The beneficial effects of the present invention are as follows: The height of the present invention can be adjusted through the structure of the wedge block and the bolt. In the pre-embedded processing stage, the installation gap is initially adjusted through the structure, a plate of a certain thickness is selected, the plate model is reduced, the mass production of the plate is improved, and the cost is reduced; in the tightening stage, the lower support and the upper support are fixed by tightening the bolts to ensure the performance of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall position of the beam end transverse limit device on the continuous steel bridge; Figure 2 It is a top view schematic diagram of the beam end transverse limit device on the continuous steel bridge; Figure 3 It is a structural schematic diagram of the transverse limiting device at the beam end; Figure 4 It is a schematic diagram of the beam end transverse limit device with a temporary connection device; Among them: 1. Heightening steel plate; 2. First friction pair; 3. Ball crown; 4. Second friction pair; 5. Intermediate seat plate; 6. Heightening wedge block; 7. Heightening reaction seat; 8. Heightening bolt; 9. Steel box; 10. Fixed end; 11. Anchor; 12. Movable end; 13. Temporary connection device; 14. Limiting device. DETAILED DESCRIPTION

[0017] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments: like Figures 1 to 4 As shown, a transverse limiting device for the end of a continuous rigid frame bridge beam includes a fixed end 10, a movable end 11 and a steel box 9 connecting the two. The movable end 11 and the steel box 9 are adjusted and fixed by a limiting device 14. The limiting device 14 is relatively arranged at two opposite side walls of the steel box 9. One side of the limiting device 14 is fixed to the movable end 11, and the height adjustment steel plate 1 of the limiting device 14 is limited to the side wall of the steel box 9.

[0018] The fixed end 10 is directly anchored and fixed to the steel box 9 via an anchor 11 .

[0019] The limiting device 14 includes a height-adjusting reaction force seat 7 , and the height-adjusting reaction force seat 7 is anchored and fixed to the movable end 11 .

[0020] The height-adjusting reaction force seat 7 is provided with an intermediate seat plate 5 , and the height-adjusting reaction force seat 7 is also provided with a linear adjustment mechanism for adjusting the intermediate seat plate 5 perpendicular to the direction of the height-adjusting reaction force seat 7 .

[0021] The linear adjustment mechanism includes a height-adjusting wedge block 6 , and the bottom of the intermediate seat plate 5 forms a driven inclined surface with the same inclination as the height-adjusting wedge block 6 .

[0022] The height-adjusting wedge blocks 6 are arranged correspondingly on the left and right sides, and the bottom of the middle seat plate 5 is V-shaped.

[0023] A spherical crown 3 is disposed at the upper end of the middle seat plate 5 , and a height-adjusting steel plate 1 is disposed at the upper end of the spherical crown 3 .

[0024] A second friction pair 4 is formed between the intermediate seat plate 5 and the ball crown 3 .

[0025] A first friction pair 2 is formed between the spherical crown 3 and the height-adjusting steel plate 1 .

[0026] Specifically, a temporary connection device 13 is also provided at the limiting device 14, and the temporary connection device 13 is connected to the middle seat plate 5 and the ball crown 3, so as to constrain the second friction pair 4 and the first friction pair 2, so that the second friction pair 4 and the first friction pair 2 are in a constrained state.

[0027] Specifically, a screw hole is formed on the side wall of the height-adjusting reaction force seat 7, and a height-adjusting bolt 8 is arranged in the screw hole. The height-adjusting bolt 8 is rotated to laterally support the back of the height-adjusting wedge block 6, thereby causing sliding between the height-adjusting wedge block 6 and the middle seat plate 5, thereby adjusting the distance between the middle seat plate 5 and the height-adjusting reaction force seat 7.

[0028] More specifically, each height-adjusting wedge block 6 is adjusted by at least two height-adjusting bolts 8 .

[0029] Specifically, Figure 1 As shown, the structure of the present invention is located inside the manhole of a continuous steel bridge.

[0030] Specifically, Figure 2 As shown, the fixed end 10 and the movable end 12 are connected by a steel box 9. The fixed end 10 is composed of a part of the steel box 9 and an anchor 11. The movable end 12 includes a limit device 14 and another part of the steel box 9. Its structure can resist its horizontal force while limiting its lateral relative displacement to no more than 0.7 mm.

[0031] Specifically, Figure 3 As shown, the limiting device includes a height-adjusting steel plate 1, a first friction pair 2, a spherical crown 3, a second friction pair 4, an intermediate seat plate 5 and a height-adjusting reaction force seat 7, and a height-adjusting wedge block 6 is provided between the intermediate seat plate 5 and the height-adjusting reaction force seat 7; the height-adjusting bolt 8 is located on the outer side of the height-adjusting reaction force seat 7, penetrates the height-adjusting reaction force seat 7 and acts on the wedge block 6, and is pushed by the height-adjusting bolt to realize stepless height adjustment.

[0032] More specifically, the thickness of the height-adjustable steel plate 1 is 18 mm, 20 mm, and 22 mm, and the appropriate thickness of the steel plate can be selected based on the measurement of the reserved gap.

[0033] Specifically, the spherical cap 3 adopts a spherical structure after cutting two sides, and the designed turning angle is 0.01 rad. Compared with the spherical structure, this structure reduces the size of the spherical cap, thereby reducing the size of the limiting device.

[0034] Specifically, the height-adjusting wedge block 6 is in a hollow shape in the middle area, and the maximum height adjustment amount is 5 mm. This structure allows its stress to diffuse to the bottom plate to cover the hollow area.

[0035] A method for installing a lateral limit device at the end of a continuous rigid frame bridge beam comprises the following steps: A. Fix one end of the steel box 9 to the fixed end 10; B. A limit device 14 of the non-height-adjustable steel plate 1 is embedded in the movable end 12; C. Measure the reserved gap and choose to increase the thickness of steel plate 1; D. Connect the height adjustment steel plate 1; E. Remove the temporary connection device 13; F. Adjust the limit device 14 to raise the steel plate 1 to press the steel box 9.

[0036] Specifically, in step A, one end of the steel box 9 is fixed to the fixed end 10, and the specific process is as follows: First, one end of the steel box 9 is placed in the manhole of the box beam and concrete is poured; Then, the steel box 9 is fixedly connected to the fixed end 10 .

[0037] Specifically, in step B, the limiting device 14 of the non-height-adjustable steel plate 1 is embedded in the movable end 12, and the specific process is as follows: First, the transfer limiting device 14, at this time, the limiting device 14 does not include the height-adjusting steel plate 1; Then, temporary connection devices 13 are provided on both sides of the limiting device 14, and the first friction pair 2 and the second friction pair 4 are in a restrained state; Finally, the limiting device 14 is embedded and fixed on the movable end 12 .

[0038] Specifically, step C measures and designs the reserved gap, and selects to increase the thickness of the steel plate 1. The specific process is as follows: First, measure the distance between the limit device 14 and the steel box 9; Then, according to the above distance, the thickness of the steel plate 1 is adjusted to a higher value.

[0039] Specifically, step D connects the height-adjusting steel plate 1, and the specific process is as follows: First, the height-adjusting steel plate 1 is placed into the beam body through the beam seam; Then, place the height-adjusting steel plate 1 in the reserved gap; Finally, the height-adjusting steel plate 1 is connected to the steel box 9 by using bolt sleeves.

[0040] Specifically, step E is to remove the temporary connection device 13, and the specific process is as follows: The bolts of the temporary connection devices 13 on both sides of the limiting device 14 are removed to release the constraints of the first friction pair 2 and the second friction pair 4.

[0041] Specifically, in step F, the limit device 14 is adjusted to raise the steel plate 1 to press the steel box 9. The specific process is as follows: First, use the height adjustment bolt 8 to push the height adjustment wedge block 6; Then, under the movement of the height-adjusting wedge block 6, the limiting device 14 and the steel box 9 are pressed tightly to eliminate the gap between the two.

[0042] The present invention improves the compressive strength of the continuous rigid frame bridge, resists the horizontal force thereof, and ensures that the lateral relative displacement is no greater than 0.7 mm under the designed horizontal force condition.

[0043] The present invention provides longitudinal and vertical displacements to ensure that the bridge rotates during vibration, and the bridge beam end limit device can provide angular rotation.

[0044] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A continuous rigid frame bridge beam end transverse limit device, comprising a fixed end (10), a movable end (11) and a steel box (9) connecting the two, characterized in that: The movable end (11) and the steel box (9) are adjusted and fixed by a limiting device (14). The limiting device (14) is arranged opposite to two opposite side walls of the steel box (9). One side of the limiting device (14) is fixed to the movable end (11). The height adjustment steel plate (1) of the limiting device (14) is limited by the side wall of the steel box (9).

2. A continuous rigid frame bridge beam end transverse limiter according to claim 1, characterized in that: The fixed end (10) is directly anchored and fixed to the steel box (9) via an anchor piece (11).

3. A continuous rigid frame bridge beam end transverse limiter according to claim 1, characterized in that: The limiting device (14) comprises a height-adjusting reaction force seat (7), and the height-adjusting reaction force seat (7) is anchored and fixed to the movable end (11).

4. A continuous rigid frame bridge beam end transverse limiter according to claim 3, characterized in that: The height-adjusting reaction force seat (7) is provided with an intermediate seat plate (5), and the height-adjusting reaction force seat (7) is also provided with a linear adjustment mechanism for adjusting the intermediate seat plate (5) in a direction perpendicular to the height-adjusting reaction force seat (7).

5. A continuous rigid frame bridge beam end transverse limiter according to claim 4, characterized in that: The linear adjustment mechanism comprises a height-adjusting wedge block (6), and the bottom of the intermediate seat plate (5) forms a driven inclined surface having the same inclination as the height-adjusting wedge block (6).

6. A continuous rigid frame bridge beam end transverse limiter according to claim 5, characterized in that: The height-adjusting wedge blocks (6) are arranged correspondingly on the left and right sides, and the bottom of the middle seat plate (5) is V-shaped.

7. A continuous rigid frame bridge beam end transverse limiter according to claim 3, characterized in that: A spherical crown (3) is arranged at the upper end of the intermediate seat plate (5), and a height-adjusting steel plate (1) is arranged at the upper end of the spherical crown (3).

8. A continuous rigid frame bridge beam end transverse limiter according to claim 7, characterized in that: A second friction pair (4) is formed between the intermediate seat plate (5) and the ball crown (3).

9. A continuous rigid frame bridge beam end transverse limiter according to claim 7, characterized in that: A first friction pair (2) is formed between the spherical crown (3) and the height-adjusting steel plate (1).

10. A method for installing a lateral limit device at the end of a continuous rigid frame bridge beam, characterized in that: The following steps are involved: A. Fix one end of the steel box (9) to the fixed end (10); B. A limit device (14) of the non-height-adjustable steel plate (1) is embedded in the movable end (12); C. Measure the reserved gap and choose to increase the thickness of the steel plate (1); D. Connect the height adjustment steel plate (1); E. Remove the temporary connection device (13); F. Adjust the limit device (14) to make the height-adjusting steel plate (1) press against the steel box (9).

Images