Highway reconstruction and expansion synchronous overall jacking replacement of bridge bearing system

Abstract

The utility model relates to a system for synchronous overall lifting and replacement of bridge bearings during highway reconstruction and expansion, including: a main beam multi-stage standardized clamp lifting system, a suspended work platform, a support cushion stone casting formwork system and a limit steel. The beneficial effects of the utility model are: relying on the main beam to set up a suspended work platform, the box-type main beam and the T-type main beam are respectively proposed to be fixed by different methods according to the main beam structure, thereby improving the applicability of the project; in addition, the suspended work platform provides a safe and reliable working space for the operators, while avoiding the problem of being unable to set up a support-type working platform under the bridge or affecting the traffic under the bridge; in view of the limited working space under the box-type main beam and the difficulty of planting reinforcement for the support cushion stone, the problem of planting reinforcement for the cap beam of the box-type main beam is solved by drilling holes on the bottom plate of the box-type main beam and installing the reinforcement on the cap beam through the holes.

Description

Technical Field

[0001] The utility model relates to the field of bridge jacking construction for highway reconstruction and expansion, and in particular comprises a synchronous integral jacking replacement bridge support system for highway reconstruction and expansion. Background Art

[0002] As a bridge structure that connects the upper and lower parts, the bearing not only transfers the main beam and the vertical load on it to the cap beam or pier, but also needs to bear the additional stress of the main beam caused by vehicle load, temperature, etc., and plays an important role in ensuring the stability of the upper and lower structures. However, with the increase in operating time and under the cyclic load of overweight and overfrequency vehicles, bridge bearings generally have serious deformation problems and are difficult to meet normal working requirements. Therefore, when renovating and expanding existing bridges, it is necessary to replace the existing bearings.

[0003] The existing bridge bearing replacement generally uses hydraulic jacks to lift the main beam. After the main beam is lifted to a suitable height, the original bearing and bearing pad stone are removed, and a new bearing pad stone is cast and replaced. The jack is retracted to unload the main beam onto the new bearing. Due to the narrow space, it is difficult to cast the bearing pad stone, and it is difficult to ensure the molding quality and bearing capacity of the bearing pad stone. The jack is usually set on the top of the cap beam or pier. When the space between the cap beam and the pier is small and it is difficult to meet the operation requirements, it is necessary to install steel brackets on the side walls of the pier or set up supporting steel frames. The installation of steel brackets requires the implantation of anchor bolts on the side walls of the pier, which is easy to cause the pier to crack and affect the bearing capacity of the pier; although the supporting steel frame does not need to be implanted with anchor bolts on the pier, it needs to be placed on a solid and reliable ground. For bridges with poor foundation bearing capacity, crossing rivers, and existing roads, it is impossible to directly set up the supporting steel frame. It is necessary to harden the ground or set up a temporary platform. The on-site work volume is large, and the construction activities affect the traffic under the bridge.

[0004] In addition, it is necessary to set up multiple jacks under the main beam for synchronous jacking operations. However, due to the difficulty of on-site control, there are likely to be pressure differences and height differences between different jacks, which can easily cause cracks in the main beam or bridge deck pavement and increase maintenance costs. Utility Model Content

[0005] The utility model aims to overcome the deficiencies in the prior art and provide a system for synchronous integral jacking and replacement of bridge bearings for highway reconstruction and expansion.

[0006] This type of highway reconstruction and expansion synchronous overall jacking and replacement bridge bearing system includes a main beam multi-level standardized hoop jacking system, a suspended working platform, a bearing pad stone casting formwork system and a limit steel;

[0007] The main beam multi-level standardized clamp lifting system includes standardized clamps, several layers of standardized clamps are clamped on the pier, hydraulic balance supports are arranged between the standardized clamps, and the uppermost standardized clamp is supported under the main beam by a lifting jack;

[0008] The suspended work platform is suspended under the main beam;

[0009] The formwork base of the support stone casting support system is set on the cap beam, the cap beam is embedded with embedded steel bars, and the formwork base is injected with micro-expansion mortar; the formwork base is provided with a supporting jack or a new support;

[0010] The upper end of the limiting steel is attached to the side of the main beam, and the lower end is anchored at the end of the cap beam.

[0011] Preferably, when the main beam is a box-type main beam, the lifting jack is directly supported on the lower surface of the box-type main beam; the suspension work platform is suspended under the box-type main beam, the bottom plate of the box-type main beam is provided with a suspension steel plate, the suspension steel plate is fixed to the bottom plate of the box-type main beam by anchor bolts, and the suspension work platform is fixed to the suspension steel plate by steel wire ropes.

[0012] Preferably, when the main beam is a T-shaped main beam, a steel cross beam is arranged below the T-shaped main beam, the lifting jack is directly supported on the lower surface of the steel cross beam, and a hydraulic balance support is arranged between the steel cross beam and the T-shaped main beam; the suspended work platform is suspended below the T-shaped main beam, a suspension clamp is provided at the lower part of the T-shaped main beam, the suspension clamp is clamped at the lower part of the T-shaped main beam, and the suspended work platform is suspended on the suspension clamp by a steel wire rope.

[0013] Preferably, a friction-enhancing rubber cushion layer is provided on the inner side of the shaped clamp.

[0014] Preferably, an upper bearing plate is provided at the upper end of the shaped clamp, a lower bearing plate is provided at the lower end, a vertical bearing plate is provided in the middle, a limiting ring is provided on the bottom surface of the lower bearing plate, and the hydraulic balance support is arranged between the upper bearing plate and the lower bearing plate of the two shaped clamps and inserted in the limiting ring.

[0015] Preferably, a rubber gasket is sleeved on the top of the hydraulic balance support.

[0016] Preferably, a stiffening steel plate and fastening bolts are provided on the bottom plate of the box-type main beam. The stiffening steel plates are arranged on the upper and lower sides of the bottom plate of the box-type main beam and are connected by fastening bolts. The support pedestal stone casting formwork system supports the stiffening steel plate on the lower side of the bottom plate of the box-type main beam through a supporting jack or a new support.

[0017] Preferably, the support cushion stone casting formwork system is arranged on the cap beam, including embedded steel bars, annular top cover and annular base. The annular base is arranged on the surface of the cap beam, the embedded steel bars are implanted in the cap beam, the top of the embedded steel bars extends into the annular base, the annular top cover is sleeved on the annular base, and micro-expansion mortar is injected into the annular top cover and the annular base; an annular steel cylinder is provided on the annular top cover, a grouting hole is provided on the annular base, an overflow hole is provided on the annular top cover outside the annular steel cylinder, and a supporting jack or a new support is provided on the annular top cover inside the annular steel cylinder.

[0018] The beneficial effects of the utility model are:

[0019] 1) The utility model arranges a suspended working platform based on the main beam, and proposes different methods to fix the suspended working platform for the box-type main beam and the T-type main beam according to the main beam structure, thereby improving the applicability of the project; in addition, the suspended working platform provides a safe and reliable working space for the operating personnel, while avoiding the problem of being unable to set up a scaffold-type working platform under the bridge or affecting the traffic under the bridge.

[0020] 2) The utility model injects micro-expansion mortar into the annular base to ensure the molding quality and strength of the cushion stone, and a supporting jack is arranged on the annular top cover to effectively ensure the elevation of the top surface of the cushion stone.

[0021] 3) The utility model aims to solve the problem of limited working space under the box-type main beam and great difficulty in anchoring the support stone. By drilling holes on the bottom plate of the box-type main beam and installing anchoring bars on the cap beam through the drilled holes, the utility model solves the anchoring problem of the cap beam of the box-type main beam.

[0022] 4) In view of the large number of T-shaped main beams, the utility model arranges a steel cross beam under the T-shaped main beam, and arranges a hydraulic balance support between the T-shaped main beam and the steel cross beam. The jacking jack acts on the steel cross beam, which solves the problem of cracking of the main beam or the bridge deck pavement layer caused by the pressure difference and height difference between the jacks during the jacking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the construction of synchronous overall lifting and replacement of the support of the box-type main beam;

[0024] Figure 2 This is a schematic diagram of the structure of the suspended work platform installed on the box-type main beam;

[0025] Figure 3 This is the side view of the suspended work platform installed on the box-type main beam;

[0026] Figure 4 This is a schematic diagram of the setting of the multi-stage standardized hoop jacking system for box-type main beam jacking;

[0027] Figure 5 This is a schematic diagram of the lifting of the box-type main beam and the replacement of the support;

[0028] Figure 6 yes Figure 5 Schematic diagram of the construction of the new support pad stone for the box-type main beam in the middle B area;

[0029] Figure 7 yes Figure 5 Schematic diagram of the new support of the box-type main beam in the middle C area being replaced and put into place;

[0030] Figure 8 yes Figure 1 The structural drawing of the hydraulic balance support in the middle A area;

[0031] Fig. 9 It is a schematic diagram of the three-dimensional structure of the stereotyped clamp;

[0032] Fig.10 It is a half-section view of the three-dimensional structure of the new support pad stone formwork system;

[0033] Fig.11 This is a schematic diagram of the construction of synchronous overall lifting and replacement of the bearings of the T-shaped main beam;

[0034] Fig.12 This is a schematic diagram of the structure of the suspended work platform installed on the T-shaped main beam;

[0035] Fig.13 This is the side view of the suspended work platform installed on the T-beam;

[0036] Fig.14 This is a schematic diagram of the setting of the multi-stage standardized hoop jacking system for T-shaped main beam jacking;

[0037] Fig.15 This is a schematic diagram of the T-beam lifting and support replacement;

[0038] Fig.16 This is a schematic diagram of the construction of the new support pad stone for the T-shaped main beam to be lifted into place;

[0039] Fig.17 This is a schematic diagram of the T-beam main beam being replaced with a new support and then put into place.

[0040] Markings in the figure: 11-box main beam, 12-T-type main beam, 13-original support, 14-original cushion stone, 15-pier column, 16-cap beam, 17-limited steel, 21-suspension work platform, 22-wire rope, 23-suspension steel plate, 24-anchor bolt, 25-suspension clamp, 31-strengthening steel plate, 32-fastening bolt, 33-embedded steel bar, 34-annular steel cylinder, 35-annular top cover, 36-annular base, 3 7- grouting hole, 38- overflow hole, 39- new bearing, 310- micro-expansion mortar, 311- support jack, 41- shaped clamp, 42- friction-increasing rubber cushion, 43- upper bearing plate, 44- vertical bearing plate, 45- lower bearing plate, 46- limiting ring, 47- hydraulic balance bearing, 48- rubber gasket, 49- hydraulic oil pipe, 410- hydraulic cylinder, 411- lifting jack, 412- steel beam. DETAILED DESCRIPTION

[0041] The utility model is further described below in conjunction with the embodiments. The description of the following embodiments is only used to help understand the utility model. It should be pointed out that for ordinary people in this technical field, the utility model can also be modified in some ways without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0042] Embodiment 1

[0043] As an example, Figures 1 to 17 As shown, this highway reconstruction and expansion synchronous overall jacking and replacement of bridge bearings system includes a main beam multi-stage standardized clamp jacking system, a suspended working platform 21, a bearing cushion stone casting formwork system and a limiting steel 17.

[0044] The main beam multi-stage standardized clamp lifting system is set on the pier column, including a standardized clamp 41, a hydraulic balance support 47, a hydraulic cylinder 410, and a lifting jack 411. The standardized clamp 41 is clamped on the pier column 15, and the hydraulic balance support 47 is set between the standardized clamps 41. The hydraulic balance support 47 is connected to the hydraulic cylinder 410 through a hydraulic oil pipe 49, and a rubber gasket 48 is sleeved on the top of the hydraulic balance support 47. The top-level standardized clamp 41 is supported under the main beam by the lifting jack 411; the inner side of the standardized clamp 41 is provided with a friction-increasing rubber cushion 42 to increase the friction between the standardized clamp 41 and the pier column 15.

[0045] An upper bearing plate 43 is provided at the upper end of the shaped clamp 41, a lower bearing plate 45 is provided at the lower end, a vertical bearing plate 44 is provided in the middle, a limiting ring 46 is provided on the bottom surface of the lower bearing plate 45, and a hydraulic balance support 47 is arranged between the upper bearing plate 43 and the lower bearing plate 45 of the two shaped clamps 41 and inserted into the limiting ring 46.

[0046] The suspended work platform 21 is suspended below the main beam;

[0047] The support stone casting formwork system is arranged on the cap beam 16, including the embedded steel bar 33, the annular top cover 35, and the annular base 36. The embedded steel bar 33 is implanted in the cap beam 16, the annular top cover 35 is sleeved on the annular base 36, and the micro-expansion mortar 310 is injected into the annular top cover 35 and the annular base 36; the annular top cover 35 is provided with an annular steel cylinder 34, the new support 39 is placed in the annular steel cylinder 34, the annular base 36 is provided with a grouting hole 37 and an overflow hole 38, and the annular top cover 35 is provided with a supporting jack 311. The annular top cover 35 outside the annular steel cylinder 34 is provided with an overflow hole 38, and the annular top cover 35 inside the annular steel cylinder 34 is provided with a supporting jack 311 or a new support 39

[0048] The upper end of the limiting steel 17 is close to the side of the main beam, and the lower end of the limiting steel 17 is anchored to the end of the cap beam 16.

[0049] Embodiment 2

[0050] As another embodiment, this embodiment 2 is proposed on the basis of embodiment 1, and the main beam is a box-type main beam 11 or a T-type main beam 12.

[0051] When the main beam is a box-type main beam 11, the lifting jack 411 is directly supported on the lower surface of the box-type main beam 11; the suspension work platform 21 is suspended below the box-type main beam 11, and the bottom plate of the box-type main beam 11 is provided with a suspension steel plate 23, which is fixed to the bottom plate of the box-type main beam 11 by anchor bolts 24, and the suspension work platform 21 is fixed to the suspension steel plate 23 by steel wire ropes 22. The bottom plate of the box-type main beam 11 is provided with a stiffening steel plate 31 and a fastening bolt 32. The stiffening steel plate 31 is provided on the upper and lower sides of the bottom plate of the box-type main beam 11, and is pulled and connected by the fastening bolts 32. The support pad stone casting formwork system supports the stiffening steel plate 31 on the lower side of the bottom plate of the box-type main beam 11 through the support jack 311 or the new support 39.

[0052] When the main beam is a T-shaped main beam 12, a steel cross beam 412 is arranged below the T-shaped main beam 12, and the lifting jack 411 is directly supported on the lower surface of the steel cross beam 412, and a hydraulic balance support 47 is arranged between the steel cross beam 412 and the T-shaped main beam 12; the suspended work platform 21 is suspended below the T-shaped main beam 12, and a suspension clamp 25 is provided at the lower part of the T-shaped main beam 12, and the suspension clamp 25 is clamped at the lower part of the T-shaped main beam 12, and the suspended work platform 21 is suspended on the suspension clamp 25 through a steel wire rope 22.

[0053] It should be noted that the parts in this embodiment that are the same or similar to those in Embodiment 3 can be referenced to each other and will not be described in detail in this application.

[0054] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

Claims

1. A system for synchronous integral lifting and replacement of bridge bearings for highway reconstruction and expansion, characterized in that: It includes the main beam multi-stage standardized hoop jacking system, suspended working platform, support pad stone casting formwork system and limit steel; The main beam multi-level standardized clamp lifting system includes standardized clamps, several layers of standardized clamps are clamped on the pier, hydraulic balance supports are arranged between the standardized clamps, and the uppermost standardized clamp is supported under the main beam by a lifting jack; The suspended work platform is suspended under the main beam; The formwork base of the support stone casting support system is set on the cap beam, the cap beam is embedded with embedded steel bars, and the formwork base is injected with micro-expansion mortar; the formwork base is provided with a supporting jack or a new support; The upper end of the limiting steel is attached to the side of the main beam, and the lower end is anchored to the end of the cap beam.

2. The system for synchronous integral jacking and replacement of bridge bearings for highway reconstruction and expansion according to claim 1 is characterized in that: When the main beam is a box-type main beam, the lifting jack is directly supported on the lower surface of the box-type main beam; the suspension work platform is suspended under the box-type main beam, and the bottom plate of the box-type main beam is provided with a suspension steel plate, which is fixed to the bottom plate of the box-type main beam by anchor bolts, and the suspension work platform is fixed to the suspension steel plate by steel wire ropes.

3. The system for synchronous integral jacking and replacement of bridge bearings for highway reconstruction and expansion according to claim 1 is characterized in that: When the main beam is a T-shaped main beam, a steel cross beam is arranged below the T-shaped main beam, the lifting jack is directly supported on the lower surface of the steel cross beam, and a hydraulic balance support is arranged between the steel cross beam and the T-shaped main beam; the suspended work platform is suspended below the T-shaped main beam, a suspension clamp is provided at the lower part of the T-shaped main beam, the suspension clamp is clamped at the lower part of the T-shaped main beam, and the suspended work platform is suspended on the suspension clamp by a steel wire rope.

4. The system for synchronous integral jacking and replacement of bridge bearings for highway reconstruction and expansion according to claim 1 is characterized in that: A friction-enhancing rubber pad is provided on the inner side of the molded clamp.

5. The system for synchronous integral lifting and replacement of bridge bearings for highway reconstruction and expansion according to claim 1 is characterized in that: An upper bearing plate is provided at the upper end of the standardized clamp, a lower bearing plate is provided at the lower end, a vertical bearing plate is provided in the middle, a limiting ring is provided on the bottom surface of the lower bearing plate, and a hydraulic balance support is arranged between the upper bearing plate and the lower bearing plate of the two standardized clamps and inserted in the limiting ring.

6. The system for synchronous integral jacking and replacement of bridge bearings for highway reconstruction and expansion according to claim 1 is characterized in that: A rubber gasket is provided on the top of the hydraulic balance support.

7. The system for synchronous integral lifting and replacement of bridge bearings for highway reconstruction and expansion according to claim 2 is characterized in that: The bottom plate of the box-type main beam is provided with stiffening steel plates and fastening bolts. The stiffening steel plates are arranged on the upper and lower sides of the bottom plate of the box-type main beam and are connected by fastening bolts. The support pad stone casting formwork system supports the stiffening steel plates on the lower side of the bottom plate of the box-type main beam through supporting jacks or new supports.

8. The system for synchronous integral jacking and replacement of bridge bearings for highway reconstruction and expansion according to claim 1 is characterized in that: The support cushion stone casting formwork system is arranged on the cap beam, including embedded steel bars, annular top cover and annular base. The annular base is arranged on the surface of the cap beam, the embedded steel bars are implanted in the cap beam, the top of the embedded steel bars extends into the annular base, the annular top cover is sleeved on the annular base, and micro-expansion mortar is injected into the annular top cover and the annular base; an annular steel cylinder is arranged on the annular top cover, grouting holes are arranged on the annular base, overflow holes are arranged on the annular top cover outside the annular steel cylinder, and a supporting jack or a new support is arranged on the annular top cover inside the annular steel cylinder.

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