Efficient replacement system for modular expansion device of multi-tower cable-stayed bridge

Abstract

The utility model relates to an efficient replacement system for a modular telescopic device of a multi-tower cable-stayed bridge. The efficient replacement system comprises a telescopic movable type hanging center joint cleaning device with overhung two ends, an expansion joint accurate falling and hoisting structure, a track movable type concrete symmetrical pouring system and a hoisting and maintaining support. The hoisting and maintaining bracket is erected on a bridge deck pavement; a maintenance support longitudinal beam in the hoisting and maintenance support stretches across the center joint and the anchoring areas on the two sides, and a pressing rod or a telescopic device hanging bracket is arranged below the maintenance support longitudinal beam through a movable telescopic hanging rod. The telescopic movable type suspended center joint cleaning device has the advantages that the telescopic movable type suspended center joint cleaning device with the two overhung ends is adopted, the overhanging supports are supported on anchoring areas on the two sides of a center joint, automatic vertical and transverse movement of the cleaning platform is achieved through the telescopic movable type suspender control device, and the center joint cleaning efficiency is effectively improved; and the safety of cleaning workers is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, and particularly includes an efficient replacement system for a modular expansion joint device of a multi-tower cable-stayed bridge. Background Art

[0002] With the development of China's economy, the highway mileage in China has reached millions of kilometers, and remarkable achievements have been made in highway construction. As an important structure in highway engineering, the expansion joint device of a bridge is one of the important components of the bridge structure. Ensuring the integrity of the expansion joint is of great significance for ensuring structural stability and driving safety. During the operation of the bridge, due to the influence of its own concrete shrinkage and creep, external load impact, natural climate and environmental factors, the expansion joint is damaged, affecting the comfort and safety of vehicle passage. At the same time, the impact of vehicles deteriorates the driving condition and affects the service life of the main bridge structure. If the expansion joint cannot be repaired or replaced in time, it will seriously affect traffic, causing varying degrees of economic losses and impacts. Also, due to the large number of vehicles passing through the road, the conventional replacement of the expansion joint takes about one month, which is a long time and affects the smoothness of the road, and cannot meet the current traffic needs. Therefore, it is very important and necessary to efficiently and quickly replace the bridge expansion joint device with the least impact on traffic. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide an efficient replacement system for a modular expansion joint device of a multi-tower cable-stayed bridge.

[0004] Such an efficient replacement system for a modular expansion joint device of a multi-tower cable-stayed bridge includes: a suspended middle joint cleaning device with two ends cantilevered and telescopic and movable, a precise positioning and hoisting structure for the expansion joint, a symmetric concrete pouring system with a movable track, and a hoisting and maintenance support.

[0005] There are anchorage areas on both sides of the middle joint, and a cast-in-place concrete continuous beam is poured in the anchorage areas; there is a deck pavement outside the anchorage areas; when cleaning the middle joint, the suspended middle joint cleaning device with two ends cantilevered and telescopic and movable is cantilevered on the middle joint through a cantilever support.

[0006] The hoisting and maintenance support is erected on the deck pavement; the longitudinal beam of the maintenance support in the hoisting and maintenance support straddles the middle joint and the anchorage areas on both sides, and a pressure bar or an expansion joint hanging bracket is provided below the longitudinal beam of the maintenance support through a movable and telescopic suspension rod.

[0007] Preferably, the two-end cantilever telescopic mobile hanging middle seam cleaning device comprises: a cantilever bracket. A cantilever bracket is erected on the middle seam at intervals. Two cross bars are symmetrically installed on the cantilever bracket. Both ends of the cantilever bracket are fixed to the anchorage area through fixing bolts. Four telescopic mobile hanging rods are symmetrically connected under the cross bars. A cleaning platform is installed at the lower ends of the four telescopic mobile hanging rods. A telescopic mobile hanging rod control device is arranged on the cantilever bracket for controlling the lateral movement of the telescopic mobile hanging rod on the cross bar and the vertical telescoping of the telescopic mobile hanging rod. A transverse bar and a reinforcing steel mesh are installed on the cleaned anchorage area.

[0008] Preferably, the precise positioning and hanging structure for the expansion joint comprises: side beam anchorage plates, anchoring steel bars, equidistant control link rods and displacement control boxes. Embedded steel bars are provided in the cast-in-place concrete continuous beam. The embedded steel bars, side beam anchorage plates and anchoring steel bars are welded and connected in the anchorage area. The displacement control boxes are arranged in the anchorage areas on both sides of the middle seam. Both ends of the equidistant control link rods are inserted into the displacement control boxes and fixed by rivets. The displacement control boxes are used to control the movement of the equidistant control link rods. Movable telescopic hanging rods are installed on the longitudinal beam of the maintenance bracket. A telescopic device hanger is installed at the lower end of the movable telescopic hanging rod. The telescopic device hanger is used to hoist the telescopic device, the telescopic rubber waterstop and the side beam section steel as a whole above the equidistant control link rods. The side beam section steel and the side beam anchorage plates are welded and connected.

[0009] Preferably, the hanging and maintenance bracket comprises: a hanging and maintenance bracket base, support vertical rods, a hanging and maintenance bracket longitudinal beam and a hanging and maintenance bracket control device; the hanging and maintenance bracket bases are placed above the bridge deck pavements on both sides of the anchorage area. Two rows of support vertical rods are installed on the hanging and maintenance bracket bases. Adjacent support vertical rods are connected by connecting cross bars. The lower sides of the support vertical rods are connected to the hanging and maintenance bracket bases through the first reinforced connecting diagonal rods. The hanging and maintenance bracket longitudinal beam spans across the anchorage area and is supported at both ends on the support vertical rods. The upper sides of the support vertical rods are connected to the hanging and maintenance bracket longitudinal beam through the second reinforced connecting diagonal rods.

[0010] Preferably, the track mobile concrete symmetrical pouring system comprises: a mobile track chassis, mobile tracks and a concrete hopper fixed mobile frame; the mobile track chassis are respectively placed above the bridge deck pavements on both sides of the anchorage area. Two rows of mobile tracks are respectively fixed on the mobile track chassis through mobile track fixing bolts. A concrete hopper fixed mobile frame is installed on the mobile tracks. A concrete hopper and a concrete hopper fixed mobile frame control device are installed on the concrete hopper fixed mobile frame. The concrete hopper fixed mobile frame control device is used to control the lateral movement of the concrete hopper. A concrete conveying conduit is arranged above the concrete hopper. The concrete hopper is arranged above the anchorage area for pouring the post-cast concrete. The upper surface of the post-cast concrete is flush with the upper surface of the side beam section steel. The upper surface of the side beam section steel is flush with the bridge deck pavement surface.

[0011] Preferably, two sets of movable telescopic suspension rods are respectively installed on the hoisting and maintenance support longitudinal beams. Pressure rods are respectively installed under the movable telescopic suspension rods. A thin film and geotextile are laid on the post-cast concrete, and the pressure rods are pressed on the thin film and geotextile. A hoisting and maintenance support control device is installed on the hoisting and maintenance support. The hoisting and maintenance support controls the up and down telescoping and longitudinal movement along the hoisting and maintenance support longitudinal beam of the movable telescopic suspension rod through the hoisting and maintenance support control device.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1) The present utility model adopts a two-end cantilever telescopic movable hanging middle seam cleaning device, which is supported on the anchorage areas on both sides of the middle seam through a cantilever support. Through the telescopic movable suspension rod control device, the automatic up and down and lateral movement of the cleaning platform is realized, effectively improving the middle seam cleaning efficiency and ensuring the safety of the cleaning workers.

[0014] 2) The present utility model forms a precise positioning hanging support for the expansion joint by arranging movable telescopic suspension rods under the hoisting and maintenance support longitudinal beam of the hoisting and maintenance support. Through the support control device, the up and down and lateral automatic control movement of the telescopic device is realized, effectively saving costs and improving construction efficiency.

[0015] 3) The present utility model forms an integrated maintenance and wind-resistant support for the precise positioning hanging support of the expansion joint by connecting a pressure rod to the bottom end of the movable telescopic suspension rod of the hoisting and maintenance support. By controlling the pressure rod under the movable telescopic suspension rod through the control device, the thin film and geotextile laid on the post-cast concrete are pressed, effectively preventing the thin film and geotextile from being blown away by the wind and affecting the maintenance of the post-cast concrete.

[0016] 4) The present utility model adopts a track movable concrete symmetric pouring system. By controlling the track movable concrete symmetric pouring systems on both sides of the telescopic device, the rapid construction of the post-cast concrete in the anchorage areas on both sides of the telescopic device is realized. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a two-end cantilever telescopic movable hanging middle seam cleaning device;

[0018] Figure 2 is a schematic structural diagram of the precise positioning hoisting structure for the expansion joint;

[0019] Figure 3 is a schematic diagram of a track movable concrete symmetric pouring system;

[0020] Figure 4 is a schematic diagram of the connection between the pressure rod and the movable telescopic suspension rod under the hoisting and maintenance support;

[0021] Figure 5It is a schematic diagram of the assembly of the expansion device and the layout of the embedded steel bars.

[0022] Explanation of the reference numerals: middle seam 1, cantilever support 2, cross bar 3, fixing bolt 4, telescopic and movable hanging rod 5, cleaning platform 6, cleaning worker 7, cleaning device 8, anchorage area 9, telescopic and movable hanging rod control device 10, cast-in-place concrete continuous beam 11, hoisting and curing support 12, base of hoisting and curing support 13, supporting vertical rod 14, connecting cross bar 15, first strengthened connecting diagonal rod 16, second strengthened connecting diagonal rod 17, longitudinal beam of hoisting and curing support 18, movable and telescopic hanging rod 19, expansion device hanging bracket 20, hoisting and curing support control device 21, expansion device 22, side beam section steel 23, anchorage plate 24, anchorage steel bar 25, equidistant control link rod 26, embedded steel bar 27, rivet 28, transverse steel bar 29, bridge deck paving 30, expansion rubber water stop 31, strengthened steel bar mesh 32, film 33, geotextile 34, pressure bar 35, movable track chassis 36, movable track 37, movable track fixing bolt 38, concrete hopper fixing and moving frame 39, concrete hopper 40, concrete hopper fixing and moving frame control device 41, post-cast concrete 42, concrete conveying conduit 43, displacement control box 44. Specific embodiments

[0023] The following further describes the present utility model in conjunction with embodiments. The description of the following embodiments is only for helping to understand the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

[0024] Embodiment 1

[0025] As an embodiment, as Figures 1 to 5 shown, this efficient replacement system for the modular expansion device of a multi-tower cable-stayed bridge includes: a middle seam cleaning device with two-end cantilever telescopic and movable hanging, a precise positioning and hoisting structure for the expansion joint, a symmetric concrete pouring system with movable tracks, and a hoisting and curing support 12.

[0026] Anchorage areas 9 are provided on both sides of the middle seam 1, and a cast-in-place concrete continuous beam 11 is poured in the anchorage areas 9; a bridge deck paving 30 is provided outside the anchorage areas 9; when cleaning the middle seam 1, the two-end cantilever telescopic and movable hanging middle seam cleaning device is cantilevered on the middle seam 1 through the cantilever support 2;

[0027] The hoisting and curing support 12 is erected on the bridge deck paving 30; the longitudinal beam 18 of the curing support in the hoisting and curing support 12 straddles the middle seam 1 and the two-side anchorage areas 9, and a pressure bar 35 or an expansion device hanging bracket 20 is provided below the longitudinal beam 18 of the curing support through a movable and telescopic hanging rod 19.

[0028] The described two - end cantilever telescopic mobile hanging middle - seam cleaning device, as Figure 1 shown, includes: a cantilever support 2 is erected at intervals on the middle - seam 1. Two cross - bars 3 are symmetrically installed on the cantilever support 2. Both sides of the cantilever support 2 are erected and fixed to the cast - in - place concrete continuous beam 11 in the anchorage area 9 through fixing bolts 4. Four telescopic mobile hanging rods 5 are symmetrically connected under the cross - bars 3. A cleaning platform 6 is installed under the four telescopic mobile hanging rods 5. The cleaning worker 7 cleans the middle - seam 1 on the cleaning platform 6 through the cleaning device 8. The telescopic mobile hanging rod control device 10 controls the lateral movement of the telescopic mobile hanging rod 5 on the cross - bar 3 and the vertical telescoping of the telescopic mobile hanging rod 5. A transverse reinforcement 29 and a reinforced steel mesh 32 are installed on the cleaned anchorage area 9.

[0029] As Figure 5 shown, the described precise positioning and hoisting structure for expansion joints includes: the side - beam anchorage plate 24, the anchoring reinforcement 25, and the displacement control box 44 are welded in the factory and then installed in the anchorage area 9. The embedded reinforcement 27 is welded to the side - beam anchorage plate 24 and the anchoring reinforcement 25 on - site in the anchorage area. The displacement control box 44 and the equidistant control link 26 are fixed by rivets 28 on both sides, and the equidistant control link 26 is controlled to the corresponding position through the displacement control box 44.

[0030] As Figure 3 shown, the described track - mobile concrete symmetric pouring system includes: movable track chassis 36 are respectively placed above the bridge deck pavement 30 on both sides of the anchorage area 9. Two rows of movable tracks 37 are respectively fixed on the movable track chassis 36 through movable track fixing bolts 38. A concrete hopper fixing and moving frame 39 is installed on the movable tracks 37. A concrete hopper 40 is installed on the concrete hopper fixing and moving frame 39. Concrete that meets the requirements is transported to the concrete hopper 40 through the concrete delivery conduit 43. The concrete is poured into the anchorage area through the concrete hopper 40 to form post - cast concrete 42. The lateral movement of the concrete hopper 40 is controlled by the concrete hopper fixing and moving frame control device 41. The insertion - type vibrator is used to insert quickly and pull out slowly and vibrate evenly strictly according to the requirements. After the post - cast concrete 42 is completely vibrated and compacted, the upper surface of the post - cast concrete 42 is leveled with the upper surface of the side - beam section steel 23 as the reference. Based on the two - side bridge deck pavement 30 surface, the upper surface of the side - beam section steel 23 is made level with the bridge deck pavement 30 surface.

[0031] Embodiment Two

[0032] As another embodiment, this second embodiment is proposed on the basis of the first embodiment. A more specific high-efficiency replacement system for the modular expansion device of a multi-tower cable-stayed bridge. The lifting and maintenance bracket 12 is connected to the compression bar 35 or the expansion device hanging bracket 20 through the movable telescopic suspender 19, forming an integrated maintenance and wind-resistant structure for the precise positioning and lifting bracket of the expansion joint. The so-called integrated maintenance and wind-resistant structure for the precise positioning and lifting bracket of the expansion joint.

[0033] As Figure 2 shown, the lifting and maintenance bracket 12 includes: a lifting and maintenance bracket base 13 is placed above the bridge deck paving 30 on both sides of the anchorage area 9. Two rows of support vertical rods 14 are installed on the lifting and maintenance bracket base 13. The adjacent support vertical rods 14 are strengthened and connected by two upper and lower connecting cross rods 15. The lower side of the support vertical rod 14 is strengthened and connected to the lifting and maintenance bracket base 13 through the first strengthening connecting diagonal rod 16. The upper side of the support vertical rod 14 is strengthened and connected to the longitudinal beam 18 of the lifting and maintenance bracket through the second strengthening connecting diagonal rod 17. The lifting and maintenance bracket 12 controls the up and down telescoping and the longitudinal movement along the longitudinal beam 18 of the lifting and maintenance bracket of the movable telescopic suspender 19 through the lifting and maintenance bracket control device 21.

[0034] A set of movable telescopic suspenders 19 are respectively installed on the longitudinal beams 18 of the lifting and maintenance brackets 12 of two groups. The expansion device hanging brackets 20 are respectively installed under the movable telescopic suspenders 19. The expansion device hanging brackets 20 integrally lift the expansion device 22, the expansion rubber waterstop 31 and the side beam section steel 23 above the equidistant control link rod 26. The side beam section steel 23 is welded to the side beam anchorage plate 24.

[0035] As Figure 4 shown, two sets of movable telescopic suspenders 19 are respectively installed on the longitudinal beams 18 of the lifting and maintenance brackets 12 of two groups. The compression bars 35 are respectively installed under the movable telescopic suspenders 19. The compression bars 35 are used to press the film 33 and the geotextile 34 laid on the post-cast concrete 42 to prevent the film 33 and the geotextile 34 from being blown away by the wind and affecting the maintenance of the post-cast concrete.

[0036] It should be noted that the same or similar parts in this embodiment and the first embodiment can be referred to each other and will not be elaborated in this application.

[0037] The various embodiments in this specification are described in a progressive manner. The key points of each embodiment are the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other.

Claims

1. An efficient replacement system for modular expansion devices of a multi-tower cable-stayed bridge, characterized in that: include: The two ends are cantilevered with retractable and movable hanging center seam cleaning devices, expansion joint precise positioning hanging structure, track movable concrete symmetrical pouring system and hanging and curing bracket; Anchorage areas are provided on both sides of the center seam, and cast-in-place concrete continuous beams are cast in the anchorage areas; bridge deck pavement is provided outside the anchorage areas; when cleaning the center seam, telescopic and movable hanging center seam cleaning devices are suspended on the center seam through cantilever brackets at both ends; The hoisting and maintenance support is erected on the bridge deck pavement; the maintenance support longitudinal beam in the hoisting and maintenance support spans the center seam and the anchoring areas on both sides, and a pressure rod or telescopic device hanger is arranged under the longitudinal beam of the maintenance support through a movable telescopic hanger.

2. The high-efficiency replacement system for modular expansion devices of multi-tower cable-stayed bridges according to claim 1 is characterized in that: The retractable and movable hanging center seam cleaning device with cantilevered ends comprises: a cantilever bracket, a cantilever bracket is erected at a certain distance on the center seam, two cross bars are symmetrically installed on the cantilever bracket, both ends of the cantilever bracket are fixed to the anchoring area by fixing bolts, four retractable and movable suspension rods are symmetrically connected under the cross bars, cleaning platforms are installed at the lower ends of the four retractable and movable suspension rods, and a retractable and movable suspension rod control device is provided on the cantilever bracket for controlling the lateral movement of the retractable and movable suspension rod on the cross bars and the vertical extension and retraction of the retractable and movable suspension rod, and transverse bars and reinforcing steel mesh are installed on the anchoring area after cleaning.

3. The high-efficiency replacement system for modular expansion devices of multi-tower cable-stayed bridges according to claim 1 is characterized in that: The precise positioning and hanging structure of the expansion joint includes: side beam anchor plates, anchor steel bars, equidistant control chain rods and displacement control box. Pre-embedded steel bars are arranged in the cast-in-place concrete continuous beam. The pre-embedded steel bars, side beam anchor plates and anchor steel bars are welded and connected in the anchor area. The displacement control box is arranged in the anchor area on both sides of the center joint. Both ends of the equidistant control chain rod are inserted into the displacement control box and fixed by rivets. The displacement control box is used to control the movement of the equidistant control chain rod. A movable telescopic hanger is installed on the longitudinal beam of the maintenance support. A telescopic device hanger is installed at the lower end of the movable telescopic hanger. The telescopic device hanger is used to hang the telescopic device, telescopic rubber waterstop and side beam steel as a whole to the top of the equidistant control chain rod. The side beam steel and the side beam anchor plate are welded and connected.

4. The high-efficiency replacement system for modular expansion devices of multi-tower cable-stayed bridges according to claim 3 is characterized in that: The lifting and maintenance support includes: a lifting and maintenance support base, a supporting vertical rod, a lifting and maintenance support longitudinal beam and a lifting and maintenance support control device; the lifting and maintenance support base is placed above the bridge deck pavement on both sides of the anchoring area, and two rows of supporting vertical rods are installed on the lifting and maintenance support base. Adjacent supporting vertical rods are connected by connecting cross rods, and the lower side of the supporting vertical rods is connected to the lifting and maintenance support base through the first reinforcing connecting diagonal rod. The lifting and maintenance support longitudinal beam spans the anchoring area, and both ends are supported on the supporting vertical rods. The upper side of the supporting vertical rods is connected to the lifting and maintenance support longitudinal beam through the second reinforcing connecting diagonal rod.

5. The high-efficiency replacement system for modular expansion devices of multi-tower cable-stayed bridges according to claim 1 is characterized in that: The track movable concrete symmetrical pouring system includes: a movable track chassis, a movable track and a concrete hopper fixed mobile frame; the movable track chassis are placed above the bridge deck pavement on both sides of the anchoring area, two rows of movable tracks are fixed on the movable track chassis by movable track fixing bolts, a concrete hopper fixed mobile frame is installed on the movable track, a concrete hopper and a concrete hopper fixed mobile frame control device are installed on the concrete hopper fixed mobile frame, the concrete hopper fixed mobile frame control device is used to control the lateral movement of the concrete hopper, a concrete conveying duct is provided above the concrete hopper, the concrete hopper is arranged above the anchoring area, and is used to pour post-cast concrete, the upper surface of the post-cast concrete is flush with the upper surface of the side beam steel, and the upper surface of the side beam steel is flush with the bridge deck pavement surface.

6. The high-efficiency replacement system for modular expansion devices of multi-tower cable-stayed bridges according to claim 1 is characterized in that: Two sets of movable telescopic hangers are respectively installed on the longitudinal beams of the lifting and maintenance support, and pressure rods are respectively installed under the movable telescopic hangers. Film and geotextile are laid on the post-cast concrete, and the pressure rods press on the film and geotextile; a lifting and maintenance support control device is installed on the lifting and maintenance support, and the lifting and maintenance support controls the upward and downward extension and extension of the movable telescopic hangers and the longitudinal movement along the longitudinal beams of the lifting and maintenance support through the lifting and maintenance support control device.

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