CN209760055U - Bridge jacking transverse limiting device - Google Patents

Abstract

In order to solve the problems of large space occupation and large reconstruction engineering amount of the existing bridge transverse limiting device, the utility model provides a bridge jacking transverse limiting device, which mainly comprises underground anchor rods, a foundation beam and a ground frame which are arranged below a man-hole at the bottom of a bridge from bottom to top, wherein the underground anchor rods are vertically inserted into a foundation, the upper parts of the underground anchor rods are vertically inserted into the foundation to a certain height, and the parts of the underground anchor rods which are leaked out of the foundation are fixedly connected into the foundation beam for fixing the foundation beam and the foundation, the ground frame mainly comprises a plurality of stand columns which are uniformly distributed along the width direction of the bridge, the lower parts of the stand columns are fixedly connected with the foundation beam, the upper parts of the stand columns are inserted into the man-hole at the bottom of the bridge, a certain gap is arranged between the stand columns and the man-hole, in addition, a plurality of cross beams are connected between the adjacent two stand columns, and, the pull rods are obliquely arranged between the outer sides of the upright columns at the left end and the right end of the ground frame and the foundation beam.

Description

bridge jacking transverse limiting device

Technical Field

the utility model relates to a bridge building technical field, in particular to horizontal stop device of bridge jacking.

Background

In bridge reconstruction and maintenance engineering, bridge jacking is an important process. The bridge jacking is to use a hydraulic device to jack up the bridge superstructure by a certain height, and then replace or maintain the support according to the needs, and then drop the superstructure.

When the bridge is jacked, the extending part of the jack is gradually lengthened along with the increase of the jacking height, and the bridge body is easy to generate longitudinal deviation (deviation along the length direction of the bridge) and transverse deviation (deviation along the width direction of the bridge). The longitudinal offset can be compensated by adjusting the width of the bridge expansion joint, and the transverse offset can influence the stress of the beam body and needs to be paid attention to.

Chinese patent CN203256623U discloses a bridge jacking lateral limiting device. The limiting device is of a frame structure and comprises a vertical support and a horizontal support, wherein the horizontal support is arranged on the vertical support. The vertical support is fixed on the existing abutment bearing platform. The angle steel on the two sides of the main supporting rod of the horizontal bracket is fixed with the bridge deck. This patent stop device vertical stand needs to be fixed at existing cushion cap bar planting, and horizontal stand also needs to be fixed with the bridge floor, all needs to carry out transformation such as bar planting to existing structure. In addition, the transverse limiting device occupies the construction space on the abutment, and the method is difficult to implement in some projects for reconstructing the abutment pier.

chinese patent CN 204959607U discloses another transverse deviation correcting device for jacking a bridge, which comprises a plurality of transverse deviation correcting mechanisms arranged between a beam bottom and a distribution beam for jacking, wherein the left side and the right side of the transverse deviation correcting mechanisms are respectively arranged in a row, each deviation correcting mechanism comprises a stressed cushion block fixed at the beam bottom and a low damping plate below the cushion block, the low damping plate can slide on the distribution beam for jacking below the low damping plate, a jacking bracket is fixed on the distribution beam and is positioned on one side of the stressed cushion block, a deviation correcting jack is positioned between the jacking bracket and the stressed cushion block, and when the bridge transversely displaces towards the right, the deviation correcting jack on the left side is controlled to push the stressed cushion block to drive a; otherwise, the jack on the right side is controlled to push the beam body to move left, so that the beam body is reset. The upper structure of the patent is not fixedly connected with the distribution beam and can slide on the distribution beam, and the upper structure is easy to move transversely in the jacking process; secondly, the deviation rectifying jack and the pushing bracket of the patent are both arranged on the distribution beam, and deviation rectification is carried out on the distribution beam, so that the requirement on a lower supporting structure is higher; thirdly, the atress cushion is connected with the roof beam body in this patent, need be at the internal bar planting of roof beam, still exists the problem of reforming transform existing structure.

Disclosure of Invention

In order to solve the problem, the utility model provides a horizontal stop device of bridge jacking, the technical scheme of adoption as follows:

A bridge jacking transverse limiting device is characterized by mainly comprising underground anchor rods, a foundation beam and a ground frame, wherein the underground anchor rods, the foundation beam and the ground frame are distributed below a manhole at the bottom of a bridge from bottom to top, the underground anchor rods are vertically inserted into a foundation, the upper part of the underground anchor rods leaks out of the foundation by a certain height, and the part of the underground anchor rod leaking out of the foundation is fixedly connected in the foundation beam and used for fixing the foundation beam and the foundation, the ground frame mainly comprises a plurality of upright posts which are uniformly distributed along the width direction of the bridge, the lower parts of the upright posts are fixedly connected with the foundation beam, the upper parts of the upright posts are inserted into the manhole at the bottom of the bridge beam, and a certain gap is arranged between the upright posts and the manhole hole, in addition, a plurality of cross beams are connected between two adjacent upright posts, and a pull rod is also connected between the ground frame and the foundation beam, and the pull rod is obliquely arranged between the outer sides of the upright columns at the left end and the right end of the ground frame and the foundation beam.

Preferably, the transverse clearance between the upright post and the manhole is smaller than the transverse offset of the beam body allowed by engineering.

Preferably, a pressure sensor and a hydraulic jack used for pushing the upright to move left and right are arranged in a gap between the upper portion of the upright and the human hole in the bottom of the bridge beam, the pressure sensor is fixedly connected to the left side and the right side of the upright in the width direction, the hydraulic jack is fixedly connected to the inner wall of the human hole in the outer side of the pressure sensor, the pressure sensor is connected with a signal output end of a control system, and the hydraulic jack is connected with a signal output end of the control system.

Preferably, the supporting rods which are distributed obliquely are arranged in each frame formed by the cross beams and the upright posts.

Preferably, the underground anchor rod is formed by welding a plurality of sections of steel pipes, cement mortar is poured into an inner hole, and an annular water stop steel plate is arranged above the underground anchor rod.

Preferably, the upright is formed by connecting or welding a plurality of sections of steel bolts.

The beneficial effects of the utility model reside in that:

1. The transverse clearance at the joint of the upright post and the manhole is smaller than the transverse displacement allowed by engineering, so that the transverse limiting effect is achieved;

2. the foundation beam plays a role in fixing a ground framework on one hand, and increases the pressure area of the foundation on the other hand, so that the situation that the local pressure is too large to exceed the limit of the bearing capacity of the foundation is prevented;

3. The upper end of the underground anchor rod is provided with an annular water stop steel plate to prevent water from being poured into the foundation;

4. The arrangement of the cross beam, the pull rod and the support rod enhances the stability and the bearing capacity of the ground frame;

5. The utility model makes full use of the existing bridge bottom manholes of the original bridge, reduces the stress height, and can be built at a certain distance from the abutment of the original bridge without occupying the construction space around the existing abutment and the pier;

6. This device only need repair the people hole in actual installation can, need not at present internal bar planting installation component of roof beam or support to reduce the damage to the roof beam body, this device is installed in the bridge below in addition, can not occupy bridge both sides space, still can normally pass during the construction.

Drawings

FIG. 1 is a schematic view of a bridge jacking lateral limiting device

FIG. 2 is an enlarged view of a portion of the connection between the pillar and the manhole in the second embodiment

The method comprises the following steps of 1-foundation beam, 2-underground anchor rod, 3-ground frame, 31-upright post, 32-pull rod, 33-cross beam, 34-support rod, 4-manhole hole, 5-hydraulic jack and 6-annular water stop steel plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings 1-2 and the embodiments.

First embodiment

As shown in figure 1, the bridge jacking transverse limiting device is fixedly connected below a manhole at the bottom of a bridge beam, the manhole at the bottom of the bridge beam is rectangular, a manhole hole is formed in the lower surface of the manhole, the bridge jacking transverse limiting device mainly comprises a foundation beam 1, a plurality of underground anchor rods 2 and a ground frame 3, the foundation beam 1 is fixedly connected on a foundation below the bottom of the bridge beam through the plurality of underground anchor rods 2, the ground frame 3 is connected between the foundation beam 1 and the manhole at the bottom of the bridge beam, wherein the underground anchor rods 2 are formed by welding a plurality of steel pipes, cement mortar is poured into the underground anchor rods, the underground anchor rods 2 are vertically inserted into the foundation below the bottom of the bridge beam, the underground anchor rods 2 leak out of the foundation to a certain height, the upper parts of the underground anchor rods 2 are inserted into the foundation beam 1, the foundation beam 1 is fixedly connected on the foundation through the underground, for preventing water from pouring into the foundation, the ground frame 3 mainly comprises a plurality of upright posts 31 which are distributed at equal intervals along the width direction of the bridge, the upper parts of the upright posts 31 are inserted into the man-made holes 4 at the bottom of the bridge beam, the lower parts of the upright posts 31 are inserted into the foundation beam 1 and fixedly connected with the foundation beam 1, the outer sides of the upright posts 31 at the left and right ends of the ground frame 3 and the foundation beam 1 are respectively provided with a pull rod 32 which is distributed obliquely, the two pull rods 32 are obliquely and symmetrically arranged at the outer sides of the upright posts 31 at the left and right ends, used for reinforcing the connection between the upright columns 31 and the foundation beam 1, and in addition, a plurality of cross beams 33 with different heights are fixedly connected between two adjacent upright columns 31, the cross beams 33 are horizontally distributed, the cross beams 33 are not contacted with the lower surface of the manhole, and in the frame formed between the upright column 31 and the cross beam 33, two support rods 34 are symmetrically and obliquely arranged for enhancing the stability of the ground frame 3 and enabling the ground frame to bear larger transverse force.

In this embodiment, the stand 31, the pull rod 32, crossbeam 33 all adopts shaped steel, bracing piece 34 adopts the channel-section steel, when stand 31 is high, can adopt multistage shaped steel bolted connection or welding to form, in addition, be provided with certain space at the junction of stand 31 and bridge beam bottom manholes, and the horizontal clearance between the two is less than the roof beam body lateral deviation that the engineering allows, when the roof beam body transversely takes place lateral deviation, stand 31 plays horizontal limiting displacement to the roof beam body, of course, before the installation, can select the diameter size of stand 31 according to the construction requirement, the roof beam body lateral deviation that the engineering allows and the aperture size of this department manholes 4 promptly.

The concrete construction process is as follows:

The integral device is built below a manhole at the bottom of a bridge beam, firstly, the manhole is repaired to be in a rectangular structure, the position of a foundation beam 1 is selected on the ground below the manhole, the position and the number of underground anchor rods 2 pre-embedded below the foundation beam 1 are determined according to the position, then, cement mortar is poured into the underground anchor rods 2 formed by welding steel pipes, annular water stop steel plates 6 are arranged at the upper ends of the underground anchor rods 2 and then vertically inserted into a foundation according to the set position, the annular water stop steel plates leak out of the foundation by a certain height, then, the foundation beam 1 is repaired by concrete above the underground anchor rods, the parts of the underground anchor rods 2 leaking out of the ground are wrapped in the foundation beam 1, the design of the structure ensures that the foundation beam 1 is prevented from being separated from the foundation when a transverse limiting device is stressed in the jacking process of the bridge, upright columns 31 are arranged at equal intervals along the width direction of the bridge, the bottoms of the upright columns are integrally poured into the, a certain transverse clearance is ensured between the upright column 31 and the inner wall of the manhole 4.

The concrete foundation beam 1 plays a role in fixing the ground frame 3 on one hand, and increases the pressed area of the foundation on the other hand, so that the local pressure is prevented from exceeding the limit of the bearing capacity of the foundation.

Second embodiment:

As shown in fig. 1 and fig. 2, the present embodiment is different from the first embodiment in that a gap between the upright column 31 and the manhole 4 is increased, two pressure sensors and two hydraulic jacks 5 are arranged in the gap, the two pressure sensors are respectively and fixedly connected to the left and right sides of the upright column, the two hydraulic jacks are electric hydraulic jacks respectively and fixedly connected to the inner walls of the left and right sides of the manhole, the electric hydraulic jacks are transversely arranged, that is, a base is fixedly connected to the inner wall of the manhole, jacking cylinders are distributed towards the upright column 31 and can extend towards the upright column 31 for pushing the upper part of the upright column 31 to rotate leftwards or rightwards, the pressure sensors are connected with a signal input end of a control system, a motor of the electric hydraulic jacks is connected with a signal output end of the control system, and in a normal state, the jacking cylinders of the electric hydraulic jacks are at a certain distance from the, when the beam body displaces to the right, the pressure sensor on the right side of the upright post 31 is extruded, and the control system controls the electric hydraulic jack on the right side of the upright post 31 to eject leftwards after receiving a signal of the pressure sensor; when the beam body displaces leftwards, the pressure sensor on the left side of the upright post 31 receives extrusion, and the control system controls the corresponding electric hydraulic jack on the left side of the upright post 31 to eject out after receiving corresponding signals, so that the maximum deflection distance of the beam body is limited, and the functions of transverse limiting and deviation correction are achieved.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements can be made, and these improvements should also be regarded as the protection scope of the present invention.

Claims (6)

1. The bridge jacking transverse limiting device is characterized by mainly comprising underground anchor rods (2) arranged below a man-hole at the bottom of a bridge from bottom to top, a foundation beam (1) and a ground frame (3), wherein the underground anchor rods (2) are vertically inserted into a foundation, the upper part of the foundation is leaked to a certain height, the part of the foundation, which is leaked by the underground anchor rods (2), is fixedly connected into the foundation beam (1) and is used for fixing the foundation beam (1) and the foundation, the ground frame (3) mainly comprises a plurality of stand columns (31), the stand columns (31) are uniformly distributed along the width direction of the bridge, the lower parts of the stand columns (31) are fixedly connected with the foundation beam (1), the upper parts of the stand columns (31) are inserted into the man-hole (4) at the bottom of the bridge beam, a certain gap is arranged between each stand column and the man-hole (4), and a plurality of cross beams (33) are connected between two adjacent stand columns (31), still be connected with pull rod (32) between ground frame (3) and foundation beam (1), pull rod (32) slope sets up between the outside of both ends stand (31) and foundation beam (1) about the ground frame.

2. The bridge jacking lateral limiting device of claim 1, wherein the lateral clearance between the upright column (31) and the manhole hole (4) is smaller than the engineering-allowed beam body lateral offset.

3. The bridge jacking transverse limiting device according to claim 1, wherein a pressure sensor and a hydraulic jack (5) used for pushing the upright to move left and right are arranged in a gap between the upper part of the upright (31) and the manhole (4) at the bottom of the bridge, the pressure sensor is fixedly connected to the left side and the right side of the upright (31) in the width direction, the hydraulic jack (5) is fixedly connected to the inner wall of the manhole (4) outside the pressure sensor, the pressure sensor is connected with a signal output end of a control system, and the hydraulic jack (5) is connected with a signal output end of the control system.

4. The bridge jacking lateral limiting device according to any one of claims 1, 2 and 3, wherein support rods (34) are obliquely distributed in each frame formed by the cross beam (33) and the upright column (31).

5. The bridge jacking transverse limiting device according to claim 4, wherein the underground anchor rod (2) is formed by welding a plurality of sections of steel pipes, cement mortar is poured into an inner hole, and an annular water stop steel plate (6) is arranged above the underground anchor rod (2).

6. The bridge jacking lateral limiting device of claim 5, wherein the upright column (31) is formed by bolting or welding multi-section steel bars.