CN202214680U - Device is changed to tied in a bow member bridge jib - Google Patents

Abstract

The tied arch bridge suspender replacing device comprises a supporting device and a computer data acquisition control system, wherein the supporting device comprises threaded rods, Bailey truss beams, carrying pole beams, distribution beams, through hydraulic jacks, through sensors and 4 threaded rods, the threaded rods are uniformly arranged around a cross beam where suspenders to be replaced are located, one end of each threaded rod is fixed at the lower end of the cross beam through the carrying pole beam, the other end of each threaded rod sequentially penetrates through a plate surface hollow plate beam, the Bailey truss beams, the distribution beams, the through hydraulic jacks, the through sensors and nuts, the Bailey truss beams are placed on the upper sides of the cross beams where the adjacent suspenders are located, and the through sensors are connected with the computer data acquisition control system. The utility model discloses the device has following advantage: the method can adapt to cable replacement operation of various tied arch bridges with different suspender intervals. Secondly, the safety is good and the control is controllable at any time. Thirdly, the equipment cost is low.

Description

Tied Arch Bridge Suspender Replacement Device

technical field

The utility model relates to a replacement device for suspension rods of a tie-rod arch bridge, which belongs to the field of civil engineering maintenance.

Background technique

Tied arch bridge is a typical type of arch bridge. It is statically determinate on the outside, super-statically indeterminate on the inside, under the action of lateral force, the arch foot has no horizontal thrust, the height of the approach bridge at both ends is low, and it does not require high geological conditions. used widely. The suspender is one of the main stress-bearing components of the tied arch bridge. The lower end is connected to the beam, and the upper end is connected to the arch rib, which plays an important role in transferring the bridge deck load to the arch rib.

During long-term use, various diseases will appear on the boom, mainly including: In the long-term use process, various diseases will appear on the boom, mainly including: First: the upper and lower anchor heads The protective concrete cracks and falls off; second: the anchor is loose, fails, and the wire slips; the third: water accumulates in the conduit and the grouting is not dense; the fourth: the protective sleeve is damaged, aged, cracked, and damaged; fifth: the cable axis is misaligned, short The boom is sheared; sixth: the steel strand or wire of the boom is unevenly stressed; seventh: the cable body is fatigued and broken. the

The existence of these diseases of the tied arch bridge has caused serious hidden dangers to the safety of the bridge. In the early morning of November 7, 2002, the suspenders of the Xiaonanmen Bridge in Yibin suddenly broke, causing the deck at both ends of the bridge to collapse. Visible, if the suspender of tie-bar arch bridge is not replaced in time, bridge disaster will certainly be caused, but still lack to the replacement device of tie-bar arch bridge suspender at present.

Utility model content

The purpose of the utility model is to design a quick replacement device for the suspender of a tie-rod arch bridge to solve the problem that the suspender needs to be replaced when it is damaged.

In order to achieve the above object, the utility model provides a tie-bar arch bridge suspender replacement device, which includes a roof support device and a computer data acquisition control system. Type hydraulic jack, through-core sensor, and four threaded rods, which are evenly arranged around the crossbeam where the suspender to be replaced is located. One end of each threaded rod is fixed on the lower end of the crossbeam through the shoulder beam. The other end of the rod passes through the hollow plate beam, the Bailey truss beam, the distribution beam, the through-hole hydraulic jack, the through-hole sensor, and the nut in sequence. On the side, the through-hole sensor is connected with the computer data acquisition control system.

A pad beam is also provided between the Bailey truss beam and the left and right beams of the suspender to be replaced, and the pad beam is placed on the upper side of the center line of the adjacent beam.

The distribution beam is perpendicular to the longitudinal direction of the Bailey truss beam, the shoulder pole beam is perpendicular to the beam directly below the suspender, the Bailey truss beam is arranged along the longitudinal direction of the bridge, and the threaded rod is arranged parallel to the suspender to be replaced.

The axes of the distribution beam, the through-type jack and the through-type load sensor coincide with the axes of the threaded rod.

The utility model device has the following advantages:

1. It can adapt to the cable changing operation of various tie-bar arch bridges with different suspender spacing.

2. Use load sensor and computer data acquisition and control system to monitor the cable replacement construction, which can be controlled at any time and has good safety.

3. The standard Bailey truss beam is used as the bearing capacity underpinning beam, which has a high degree of standardization, no special manufacturing, and low equipment cost.

4. The construction work is carried out on the bridge deck, and the operation surface is large, which is convenient for mechanized operation and improves the efficiency of cable replacement.

Description of drawings :

Fig. 1 is the structural representation of the utility model tied arch bridge suspender replacement device;

Fig. 2 is the replacement device assembly of the present utility model;

Fig. 3 is A-A sectional view of Fig. 1;

Among them: 1. Boom; 2. Bailey truss beam; 3. Shoulder beam; 4. Distribution beam; 5. Through-hole jack; 6. Through-hole load sensor; 7. Nut; Computer data acquisition system; 12. Beam; 13. Pad beam.

Specific implementation methods :

Below in conjunction with accompanying drawing, technical scheme of the present utility model is described in detail:

As shown in Figure 1 and Figure 2, the boom replacement device consists of a Bailey truss beam 2, a shoulder beam 3, a distribution beam 4, a through-type jack 5, a through-type load sensor 6, a nut 7, a threaded rod 8, The computer data acquisition system 9 and the pad beam 13 are composed.

The specific layout method, the utility model is erected between the adjacent suspenders by the Bailey truss beam 2, and rests on the pad beam 13, the pad beam 13 is placed on the upper side of the center line of the adjacent beam, and the Bailey truss beam 2 Above is the distribution beam 4, the through-type hydraulic jack 5 is placed between the distribution beam 4 and the through-type load sensor 6, and a shoulder beam 3 is arranged under the beam 12 under the suspender 1 to be replaced, and the threaded rod 8 runs through the hollow Type sensor 6, heart-through type hydraulic jack 5, distribution beam 4, Bailey truss beam 2, hollow plate beam 11, pole beam 3, the upper and lower ends of threaded rod 8 are fixed by nut 7 respectively. the

The through-core load sensor 6 is connected with a computer data acquisition control system 9 . The distribution beam 4 is perpendicular to the longitudinal direction of the Bailey truss beam 2, the shoulder pole beam 3 is parallel to the beam 12 directly below the suspender 1, and the direction of the Bailey truss beam 2 is parallel to the longitudinal direction of the bridge. The threaded rod 8 is parallel to the boom 1 so as to be stressed.

During the utility model work, comprise the steps:

The first step is to install the roof support device——set up a Bailey truss beam 2 between the suspension rods on the left and right sides of the suspension rod 1 to be replaced, and the roof support device is installed next to the suspension rod 1 to be replaced. The system 9 observes the internal force collected by the through-hole load sensor 6 in real time. When the internal force is not less than the internal force of the suspender 1 to be replaced, the internal force of the suspender 1 to be replaced is unloaded to zero, and the through-hole hydraulic jack 5 applies an upward force. The load transfer path is: through-hole hydraulic jack 5 → through-type load sensor 6 → nut 7 → threaded rod 8 → shoulder beam 3 → beam 12; the downward force transmission path of the force is: through-type hydraulic jack 5→ Distribution beam 4→ Bailey truss beam 2→ Pad beam 13→ Left and right beams;

The second step is to remove the suspender 1 to be replaced and install a new suspender——after the internal force of the suspender 1 to be replaced is unloaded to zero, remove the anchoring devices at both ends of the suspender 1 to be replaced, and take out the suspender 1 to be replaced with traction equipment , and unfold the new suspender, install it in place, and tighten the new anchor;

The third step, loading—Bayley truss girder 2 internal force transfer: Bailey truss girder 2→new suspender; gradually remove the force of the through-hole hydraulic jack, and the load is still transmitted according to the force transmission path described in the first step. Force the newly replaced suspender to complete the replacement.

The above-mentioned through-hole hydraulic jack 5 works upwards for lifting and downward unloading, and the computer data acquisition and control system 9 monitors the stress of the threaded rod 8, and simultaneously measures the cable force of the boom 1 to be replaced and the cable force of the replaced boom.

Claims (4)

1. tied arch bridge hanger rod changing device more; It is characterized in that: comprise support device and computer data acquiring control system (9); Said support device comprises threaded rod (8), Bailey truss beam (2), shoulder pole girder (3), distribution beam (4), feed-through hydraulic jack (5), vertically-displacable sensor (6); Said threaded rod (8) is 4; Be evenly arranged in suspension rod to be replaced (1) place crossbeam (12) around; One end of said every threaded rod (8) is fixed on said crossbeam (12) lower end through said shoulder pole girder (3); Threaded rod (8) other end passes plate face hollow slab beam (11), Bailey truss beam (2), distribution beam (4), feed-through hydraulic jack (5), vertically-displacable sensor (6), nut (7) successively, and said Bailey truss beam (2) is placed on the upside of adjacent suspension rod place crossbeam (12), and said vertically-displacable sensor (6) is connected with said computer data acquiring control system (9).

2. tied arch bridge hanger rod according to claim 1 is changing device more; It is characterized in that: also be provided with bearing beam (13) between said Bailey truss beam (2) and said suspension rod to be replaced (1) left and right sides crossbeam, said bearing beam (13) is placed on the upside at the adjacent beams center line.

3. tied arch bridge hanger rod according to claim 1 is changing device more; It is characterized in that: shoulder pole girder (3) is placed perpendicular to crossbeam (12); Bailey truss beam (2) is along vertical layout of bridge; Distribution beam (4) is perpendicular to vertical placement of said Bailey truss beam (2), and said threaded rod (8) is arranged in parallel with suspension rod to be replaced (1).

4. tied arch bridge hanger rod according to claim 1 is changed device and method, it is characterized in that: the axis of said distribution beam (4), vertically-displacable jack (5), vertically-displacable load sensor (6) and the dead in line of said threaded rod (8).

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