CN111058379A - Walking type sliding and pushing construction method for bridge construction - Google Patents
Walking type sliding and pushing construction method for bridge construction Download PDFInfo
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- CN111058379A CN111058379A CN201811200260.8A CN201811200260A CN111058379A CN 111058379 A CN111058379 A CN 111058379A CN 201811200260 A CN201811200260 A CN 201811200260A CN 111058379 A CN111058379 A CN 111058379A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a walking type sliding pushing construction method for bridge construction, which comprises the following steps: assembling the steel trussed beams on site, arranging pushing power, jacking the steel trussed beams, replacing steel trussed beam sliding blocks, pushing and transversely moving the steel trussed beams on the slideway beams, sliding truss beam nodes out of the sliding rails, jacking the steel trussed beams again, and circularly pushing until the steel trussed beams reach a designed position; compared with the traditional pushing mode, the walking type sliding pushing construction method for bridge construction can effectively reduce the horizontal thrust borne by the buttress, improve the stress of the bridge structure, greatly ensure the overall stability and local stability requirements during the bridge pushing construction, and enable the outside to see innovation and development in the field of bridge pushing.
Description
Technical Field
The invention relates to a construction method, in particular to a walking type sliding and pushing construction method for bridge construction, and relates to the technical field of bridge construction.
Background
In recent years, with the rapid development of scientific technology, various novel bridge construction technologies greatly promote the development of China in the bridge field in the bridge construction aspect. The multi-point walking type pushing and sliding construction technology is a more perfect and safer bridge pushing technology formed by continuously exploring and improving an original pushing construction technology aiming at a truss bridge. However, in most of bridge pushing schemes, the lower chord of the steel truss girder is easy to deform in the pushing process, the pushing reaction force on the point-type pushing support is too large, overturning is likely to occur in the pushing process, the pushing construction is generally carried out on the river, the wind load borne by the point-type pushing support is large, and the steel truss girder can overturn to one side in the pushing, jacking or girder falling process. Therefore, the beam body deflects when being pushed, jacked or dropped, which easily causes unnecessary situations such as construction period delay, equipment damage and personnel casualties.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the existing bridge construction pushing scheme and provides a walking type sliding pushing construction method for bridge construction, so that the problems are solved.
In order to achieve the purpose, the invention provides the following technical scheme: a walking type sliding and pushing construction method for bridge construction comprises the following steps:
the method comprises the following steps: assembling the steel truss girder on site;
step two: arranging pushing power;
step three: jacking the steel truss girder;
step four: replacing the steel truss girder slide block;
step five: pushing and transversely moving the slideway beam;
step six: the truss beam node slides out of the slide rail;
step seven: jacking the steel truss girder again;
step eight: taking down the slide block;
step nine: observing the construction progress;
step ten: assembling the subsequent steel truss girder according to the ninth step;
step eleven: continuing jacking the steel truss girder according to the ninth step;
the method comprises the following steps: and according to the eleventh step, circularly pushing until the designed position is reached.
As a preferred technical scheme of the invention, the first step comprises the arrangement and the type selection of the assembly support, the erection of the assembly support, the arrangement and the type selection of the sliding chute support at the pier, the arrangement of the jacking jack and the sliding device, the arrangement of the walking type jacking equipment of the walking machine and the selection of the hoisting equipment at the assembly support.
As a preferred technical scheme of the invention, the assembling support comprises a steel truss girder assembling support, a pier pushing support and an underwater temporary pier pushing support.
In the fifth step and the sixth step, a sliding steel plate, a rubber support and an adjusting steel plate are arranged on the slideway longitudinal beam as a sliding device.
As a preferred technical scheme of the invention, in the second step, an SLBLJ-500 type walking machine is used as a jacking power source.
As a preferred technical scheme of the invention, the rigid truss girder assembling support, the pier pushing support and the underwater temporary pier pushing support are respectively provided with an assembling platform.
Compared with the prior art, the invention has the beneficial effects that: compared with the traditional pushing mode, the walking type sliding pushing construction method for bridge construction can effectively reduce the horizontal thrust borne by the buttress, improve the stress of the bridge structure, greatly ensure the overall stability and local stability requirements during the bridge pushing construction, and enable the outside to see innovation and development in the field of bridge pushing.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a diagram illustrating the steps of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1
As shown in FIG. 1, the invention provides a walking type sliding pushing construction method for bridge construction, which comprises the following steps:
the method comprises the following steps: assembling the steel truss girder on site;
step two: arranging pushing power;
step three: jacking the steel truss girder;
step four: replacing the steel truss girder slide block;
step five: pushing and transversely moving the slideway beam;
step six: the truss beam node slides out of the slide rail;
step seven: jacking the steel truss girder again;
step eight: taking down the slide block;
step nine: observing the construction progress;
step ten: assembling the subsequent steel truss girder according to the ninth step;
step eleven: continuing jacking the steel truss girder according to the ninth step;
the method comprises the following steps: and according to the eleventh step, circularly pushing until the designed position is reached.
The method comprises the steps of firstly, arranging and selecting a splicing support, erecting the splicing support, arranging and selecting a sliding chute support at a pier, arranging a jacking jack and a sliding device, arranging walking type jacking equipment of a walking machine, and selecting hoisting equipment at the splicing support; the assembling support comprises a steel truss girder assembling support, a pier pushing support and an underwater temporary pier pushing support; specifically, the steel truss girder splicing support is arranged between a pier and a temporary pier support, the length is about 33.5m, the width is 10.8m, and considering that a crawler needs to provide horizontal friction force during initial pushing, the splicing support is arranged to the initial position of a temporary pier, the initial splicing steel truss girder starts at the position of the temporary pier, phi 325 x 8 steel pipe columns are adopted on platform support columns (two sides), phi 630 x 8 steel pipe columns are adopted in the middle of the pushing support columns, the transverse spacing between the steel pipe columns is 3.0m, the longitudinal spacing is 5m, phi 150 x 6 steel pipe welding is adopted for inter-column support and diagonal bracing, I32b I-shaped steel is adopted for steel pipe pile upper cross beams, I14I-shaped steel is adopted for longitudinally densely paving, the spacing is 60cm, and 8mm herringbone anti-skid steel plates are fully paved on the I14I-shaped steel to serve as an operation platform; the height of the assembly support is about 11.5 meters, the steel pipe column adopts reinforced concrete to expand the foundation, the middle upright post expands the foundation by 200cm multiplied by 60cm, the bottom is distributed with a single layer of reinforcing mesh, the diameter of the reinforcing steel bar is 16mm, and the distance is 10 cm; the size of the expanded foundation of the upright columns at two sides is 120cm multiplied by 120cm, a single-pass reinforcing mesh is paved at the bottom, the diameter of the reinforcing mesh is 16mm, and the distance between the reinforcing meshes is 22 cm; in order to ensure the operation safety, safety guardrails are arranged around the assembling rack, and the guardrails are formed by welding angle bars of <50 degrees and have the height of 1.0 meter; the pushing supports at the bridge piers are arranged at the pier positions of the bridge piers and are divided into three groups, each group of support structure is a double-row 4 phi 800 x 12 steel pipe upright post which is directly supported on a bridge pier bearing platform, a phi 215 x 6 steel pipe is used for longitudinal horizontal support to be welded with an embedded part at the pier positions, the embedded part needs to be embedded when the bridge piers are manufactured, and the bridge pier can be implemented after the design strength of the pier posts needs to be 100% when the bridge is pushed; the underwater temporary pier pushing support is positioned in the middle of each pier and comprises 6 groups, each group of temporary pier supports adopts phi 1000X 12 steel pipe columns, the support foundation adopts a steel pipe pile foundation, the bearing capacity of the steel pipe pile needs to meet the upper load requirement, the longitudinal and transverse horizontal tie bars and the inclined struts adopt phi 215X 6 steel pipes, steel pipe columns are provided with steel cross beams with the cross sections of 1000X 1200mm and the lengths of 7m, the cross beams are provided with Z-shaped longitudinal sliding groove beams, and all connections are fully welded by fillet welds. The steel tube upright posts are provided with flange plates with the sections phi of 1000 x 20mm, steel cross beams with the lengths of 7m are arranged at the upper ends of the upright posts, Z-shaped longitudinal sliding groove beams are arranged on the cross beams, height differences exist between the two sides of a pier on the longitudinal sliding groove beams, the elevation of the top end is controlled during construction of the upright posts, the width of each sliding groove beam is 780mm, and the total length is 6.85 m. And a vertical jack and a walking machine are arranged on the lower side slideway beam, and all connections on the upright post and the cross beam adopt fillet weld full welding.
In the fifth step and the sixth step, a sliding steel plate, a rubber support and an adjusting steel plate are arranged on the slideway longitudinal beam as a sliding device; specifically, the steel plate sliding block is subjected to rounding treatment by adopting the top end of a 12mm steel plate, 2 blocks are arranged at each node, the size is 300mm multiplied by 900mm multiplied by 12mm, the weight of each block is 25.4kg, the rubber support is a 300 multiplied by 74 plate type rubber support, 6 blocks in 2 rows and 3 rows are distributed at each node of the rubber plate, the upper part of each block is in contact with the bottom surface of the arc-shaped steel plate, the lower part of each block is in contact with the slideway steel plate, after lubricating oil or water is coated on the contact surface of the sliding steel plate and the chute beam, the friction coefficient is 0.1, the friction coefficient of each block is 600 multiplied by 300 multiplied by 20mm, each block is 3 blocks, the weight of each block is 28.2kg, the. The pushing and sliding of the whole steel truss girder mainly depends on the pushing support sliding groove and the splicing support sliding groove, and because the positions are different, the section forms of the two sliding grooves are different.
In the second step, an SLBLJ-500 type walking machine is used as a jacking power source; specifically, the vertical adjusting system of the SLBLJ-500 type walking machine can accurately control the vertical height and the stress. The vertical adjustment of the single pier can be carried out synchronously and separately. The vertical rotation requirement of equipment and a beam body can be met, the supporting point settlement caused by construction load is adjusted, the stress of the support of the walking machine is controlled, and the vertical jacking jack needs to frequently carry load to ascend and descend in the jacking process, so that a balance valve is arranged on the vertical jacking jack to realize stability and no impact. The control system has two functions of manual inching control and computer linkage automatic control. Linkage or inching work can be selected according to factors such as environment and the like, and linkage control is generally used under the working conditions of good construction environment and small vertical load; the inching control is generally used under the complex working condition of large field variability and large vertical load. An electro-hydraulic control unit, an oil station, a displacement sensor, an inclination sensor, a color code sensor, a pump station, a hydraulic pipeline and other control execution elements are arranged beside each walking machine pushing device. Each control slave unit has the capability of detecting pressure, displacement, a color code sensor, an inclination signal and controlling the action of each oil cylinder. And the executing valve actions in the slave station system of the group walking machines can be controlled according to the instruction of the central controller. The whole walking machine jacking construction is carried out under the control of a Central Processing Unit (CPU), the controller can carry out bus control on a walking machine body slave station system, and dynamically displays the pressure of each walking machine jack device, jacking displacement height adjustment control, jacking displacement synchronous distance control, the gradient of a jacking sliding box, axis deviation and other information, and the working performance of the walking machine mechanism device is as follows:
(1) the jacking devices are synchronously controlled, a displacement sensor and a pressure sensor are mounted on each vertical jacking device of the walking machine, each jacking device is provided with a synchronous control oil station for better controlling the synchronous jacking work of the walking machine group, and the oil supply error of each jacking synchronous oil station is about 5%. Based on the jacking synchronous oil station, the control system can obtain the displacement height according to the displacement sensor arranged on the jacking device of each walking machine, and according to the actual situation, an operator can set the corresponding displacement leveling height (the parameter is set according to the elevation parameters of each walking machine and the box girder) and leveling pressure (the minimum stress parameter of the box girder jacked by the walking machine) on the touch screen. All the current walkers participating in the work are in the minimum stress state, at the moment, an operator can set the synchronous jacking displacement height of the group of walkers and the current pressure parameter value of each group of walkers on the touch screen according to the propelling requirement, and jacking are started after the jacking reaches the set value and is separated from the safety distance. The top lifting also sets the descending distance parameter on the touch screen, and the walking machine which participates in the work descends and stops working after reaching the set value.
(2) The thrusters are synchronously controlled, each thrustor is synchronously controlled by one oil station, and the oil supply error of each thrusting synchronous oil station is about 5 percent. A high-precision displacement sensor is arranged on each walking machine pushing sliding box, the moving distance of the sliding boxes is monitored in real time, a control system collects and calculates the displacement data of the group of walking machines participating in pushing construction, a regulating valve on a corresponding walking machine oil station is set through calculation control, an operator sets a correction value on a touch screen, comparison calculation is carried out according to the set correction value, and pushing synchronous circulating propulsion of the walking machines is controlled, so that synchronous and accurate pushing of the group of walking machines participating in construction can be controlled within 1 mm.
(3) Slide box device and support: in order to ensure the safety of the support and the walking machine in the pushing process, an inclination sensor is arranged at the upper end of each walking machine slide box, the balance and the support condition of the slide boxes in the pushing process can be fed back to a main controller through the inclination sensor, and judgment and control are performed through the operation of the main controller. And setting parameters in the system touch screen according to the actual condition of the inclination angle. And when the balance degree is greater than 2.5%, the control system stops working.
(4) Deviation correcting device: a color mark sensor is arranged at the upper end of each walking machine, and whether the central axis is consistent with the designed central axis or not is detected (the method is only suitable for linear pushing, and the function can be shielded in touch screen options in the curve pushing process). The method comprises the steps of marking three colors of yellow, green and red on the central axis position of the bottom of the box girder, wherein the green is the central axis position, the yellow is the left deviation of the axis, the red is the right deviation of the central axis, judging whether the box girder is in the central axis position or not through the detection of chromatic aberration, and if the box girder is not in the central axis position, detecting whether the box girder is in the left deviation or the right deviation. At this time, a specific offset azimuth indication is displayed on the touch screen. And realizing transverse deviation correction according to the deviation direction.
Splicing platforms are arranged beside the rigid truss girder splicing support, the pier pushing support and the underwater temporary pier pushing support; specifically, a working platform is arranged at each support, and is used for taking out and placing a sliding block and a steel plate in the pushing process of the truss girder except for placing an oil station, the sliding block and the steel plate are laid in time to adjust the height every time each node passes through the front of a vertical jack, and similarly, when the next node reaches the position of the vertical jack, the jack is used for jacking the truss girder in time, the sliding block which is about to slide out of the chute girder is taken out until the pushing is finished; the working platform is welded with a cross beam by I14I-shaped steel, 8mm pattern steel plates are paved on the working platform, and the periphery is welded with a guardrail with the height of 1.0m by using angle iron (50).
In conclusion, compared with the traditional pushing method, the walking type sliding pushing construction method for bridge construction can effectively reduce the horizontal thrust borne by the buttress, improve the stress of the bridge structure, greatly ensure the requirements on the overall stability and the local stability during the bridge pushing construction, and enable the outside to see the innovation and the development of the bridge pushing field.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. A walking type sliding and pushing construction method for bridge construction is characterized in that: the construction method comprises the following steps:
the method comprises the following steps: assembling the steel truss girder on site;
step two: arranging pushing power;
step three: jacking the steel truss girder;
step four: replacing the steel truss girder slide block;
step five: pushing and transversely moving the slideway beam;
step six: the truss beam node slides out of the slide rail;
step seven: jacking the steel truss girder again;
step eight: taking down the slide block;
step nine: observing the construction progress;
step ten: assembling the subsequent steel truss girder according to the ninth step;
step eleven: continuing jacking the steel truss girder according to the ninth step;
the method comprises the following steps: and according to the eleventh step, circularly pushing until the designed position is reached.
2. The construction method of walking type sliding pushing for bridge construction according to claim 1, characterized in that: the first step comprises the steps of arranging and selecting the splicing supports, erecting the splicing supports, arranging and selecting the sliding groove supports at the bridge piers, arranging the jacking jacks and the sliding devices, arranging the walking type jacking equipment of the walking machine, and selecting the hoisting equipment at the splicing supports.
3. The construction method of walking type sliding pushing for bridge construction according to claim 2, characterized in that: the assembling support comprises a steel truss girder assembling support, a pier pushing support and an underwater temporary pier pushing support.
4. The construction method of walking type sliding pushing for bridge construction according to claim 1, characterized in that: and in the fifth step and the sixth step, a sliding steel plate, a rubber support and an adjusting steel plate are arranged on the slideway longitudinal beam as a sliding device.
5. The construction method of walking type sliding pushing for bridge construction according to claim 1, characterized in that: and in the second step, an SLBLJ-500 type walking machine is used as a jacking power source.
6. The construction method of walking type sliding pushing for bridge construction according to claim 3, characterized in that: and the rigid truss girder assembling support, the pier pushing support and the underwater temporary pier pushing support are all provided with assembling platforms.
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| CN201811200260.8A CN111058379A (en) | 2018-10-16 | 2018-10-16 | Walking type sliding and pushing construction method for bridge construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811200260.8A CN111058379A (en) | 2018-10-16 | 2018-10-16 | Walking type sliding and pushing construction method for bridge construction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115233569A (en) * | 2022-08-16 | 2022-10-25 | 中铁二十五局集团第一工程有限公司 | Pushing device for assembling fully-prefabricated bridge of subway span line |
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| KR100699413B1 (en) * | 2006-05-02 | 2007-03-23 | 삼표이앤씨 주식회사 | Channel bridge construction method available to control channel bridge segment sag |
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| CN107988921A (en) * | 2017-10-30 | 2018-05-04 | 四川公路桥梁建设集团有限公司 | A kind of cross-line bridge single-point successively incremeantal launching method construction method of overcrossing railway, highway |
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2018
- 2018-10-16 CN CN201811200260.8A patent/CN111058379A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0443214A2 (en) * | 1990-02-20 | 1991-08-28 | Harumoto Iron Works Co., Ltd. | Laying method of members |
| KR100699413B1 (en) * | 2006-05-02 | 2007-03-23 | 삼표이앤씨 주식회사 | Channel bridge construction method available to control channel bridge segment sag |
| CN102373671A (en) * | 2011-11-18 | 2012-03-14 | 中铁四局集团有限公司 | Steel trussed beam and flexible arch bridge construction method with vault pushing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115233569A (en) * | 2022-08-16 | 2022-10-25 | 中铁二十五局集团第一工程有限公司 | Pushing device for assembling fully-prefabricated bridge of subway span line |
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Application publication date: 20200424 |