Steel box girder hoisting and pushing construction system and method for constructing temporary supporting slide way

Abstract

The invention discloses a steel box girder hoisting pushing construction system for constructing a temporary support slideway, which comprises a pushing assembly and a temporary pushing support assembly, the pushing assembly comprises a force transmission steel strand and a pushing device, the force transmission steel strand is connected with a steel box girder, one end of the steel box girder is detachably provided with a guide beam, the pushing device drags the force transmission steel strand to push the steel box girder to move, and the temporary pushing support assembly is connected with the force transmission steel strand. The temporary pushing support assembly comprises a starting pushing support, a plurality of middle pushing supports, a counter-force pushing support, a crossing pushing support and an end point pushing support, and the upper side of the starting pushing support, the upper sides of the middle pushing supports, the upper side of the counter-force pushing support, the upper side of the crossing pushing support and the upper side of the end point pushing support are each fixedly provided with at least one sliding way assembly. The pushing device is detachably arranged on the counter-force pushing support. According to the incremental launching construction system, repeated jacking, descending and resetting are not needed, and the construction efficiency is improved. The other purpose of the invention is to provide a construction method which is few in construction steps, high in construction efficiency and low in safety risk.

Description

Technical Field

[0001] The invention relates to the technical field of highway bridge box girders, and in particular to a steel box girder hoisting and jacking construction system and a construction method for constructing a temporary supporting slideway. Background Art

[0002] The construction of highway bridge box girders is difficult and has high safety risks, especially when it is necessary to cross existing roads, which requires a long time to close the road. At present, the construction of highway bridge box girders is carried out by hoisting or jacking. The construction advantage of the jacking method is that it does not require a long time to close the construction section traffic, and has little impact on the traffic in the crossing area. Therefore, many highway bridge box girders are constructed by jacking. The existing jacking method is to use a walking jacking device for jacking. The walking jacking device pushes the box girder upward, and then the walking jacking device drives the box girder forward a certain distance, and then the walking jacking device descends, and then the above actions are repeated, thereby driving the box girder to move.

[0003] Although the above method can drive the box girder to move, the displacement is short each time, and there are many repeated actions. It is necessary to repeatedly lift, move horizontally, lower and reset, which has low construction efficiency. In addition, the structure of the walking jack is complicated. If it is damaged, the box girder needs to be lifted for repair, which is difficult to repair. In addition, due to the reliance on the support force of the walking jack, the existing support system is relatively simple, the construction stability is poor, and the safety risk is high. Therefore, a new technical solution is urgently needed to solve at least one of the above technical problems. Summary of the invention

[0004] In view of the above shortcomings, one object of the present invention is to provide a steel box girder lifting and pushing construction system for constructing a temporary support slideway, wherein the slideway is constructed by the slideway assembly on the upper side of the temporary pushing bracket assembly, and the pusher drags the force-transmitting steel strand to push the steel box girder along the slideway, without the need for repeated lifting, lowering and resetting, thereby improving the construction efficiency, and the temporary pushing bracket assembly has a good supporting effect on the steel box girder. Another object of the present invention is to provide a construction method with fewer construction steps, high construction efficiency and low safety risks.

[0005] In order to achieve the above technical objectives and meet the above technical requirements, the technical solution adopted by the present invention is: A steel box girder hoisting and jacking construction system for constructing a temporary support slideway, characterized by comprising: A pushing assembly for pushing a steel box girder comprises a force transmission steel strand and a pusher for pulling the force transmission steel strand, wherein the force transmission steel strand is connected to the steel box girder, the pusher pulls the force transmission steel strand to push the steel box girder to move, and a guide beam is detachably provided at one end of the steel box girder; A temporary jacking support assembly for supporting a steel beam box comprises a starting jacking support, a plurality of intermediate jacking supports, a reaction jacking support, a cross jacking support and a terminal jacking support which are arranged in sequence, at least one slideway assembly is fixedly arranged on the upper side of the starting jacking support, the upper side of the plurality of intermediate jacking supports, the upper side of the reaction jacking support, the upper side of the cross jacking support and the upper side of the terminal jacking support respectively, and the jacking device is detachably arranged on the reaction jacking support.

[0006] As a preferred technical solution, the slide assembly includes a slide beam and a slide plate fixedly arranged on the upper side of the slide beam, and the slide plate is arranged in the longitudinal direction.

[0007] As a preferred technical solution, the starting pushing bracket includes a first supporting beam, two first supporting trusses symmetrically arranged at intervals on the lower side of the first supporting beam, the first supporting trusses include four first supporting columns vertically arranged on the lower side of the first supporting beam, and a plurality of first reinforcing support rods fixedly arranged on the first supporting columns, the four first supporting columns are symmetrically arranged in pairs, the first supporting beam extends laterally, and at least one of the first supporting trusses is fixedly provided with a first inclined support column close to the first support column of the intermediate pushing bracket.

[0008] As a preferred technical solution, the intermediate pushing bracket includes a second supporting beam, two second supporting trusses symmetrically arranged at intervals on the lower side of the second supporting beam, the second supporting trusses include four second supporting columns vertically arranged on the lower side of the second supporting beam, and a plurality of second reinforcing support rods fixedly arranged on the second supporting columns. The four second supporting columns are symmetrically arranged in pairs, and an intermediate supporting column is arranged between the two second supporting trusses. The upper end of the intermediate supporting column is fixedly connected to the second supporting beam, and the second supporting beam extends laterally. At least one second supporting column of the second supporting trusses that is away from the second supporting column of the starting pushing bracket is fixedly provided with a second inclined support column.

[0009] As a preferred technical solution, the reaction-force pushing bracket includes a third supporting beam, two rows of third supporting columns vertically arranged on the lower side of the third supporting beam, and a plurality of third reinforcing support rods arranged on the third supporting columns. The two rows of the third supporting columns are arranged side by side, and the third supporting columns in each row are arranged equidistantly. Permanent piers are arranged on the periphery of the third supporting columns in a row close to the middle pushing bracket, and a third inclined support column is fixedly arranged between the third supporting columns in a row close to the middle pushing bracket and the permanent pier.

[0010] As a preferred technical solution, the cross-pushing bracket includes a fourth supporting beam, four fourth supporting columns vertically arranged on the lower side of the fourth supporting beam, and a plurality of fourth reinforcing support rods arranged on the fourth supporting columns. The four fourth supporting columns are symmetrically arranged in pairs, and the two fourth supporting columns facing away from the reaction-force pushing bracket are respectively provided with a fourth oblique support column.

[0011] As a preferred technical solution, the terminal pushing bracket includes a fifth supporting beam, two rows of fifth supporting columns vertically arranged on the lower side of the fifth supporting beam, and a plurality of fifth reinforcing support rods arranged on the fifth supporting columns. A fifth oblique support column is respectively arranged away from the fifth supporting columns in a row across the pushing bracket.

[0012] As a preferred technical solution, a distribution beam is provided at the lower end of the third support column, and a plurality of bottom supporting steel pipes are provided at the lower side of the distribution beam.

[0013] As a preferred technical solution, at least one anchor is provided on the lower side of the steel box girder, and the force-transmitting steel strand is connected to the anchor.

[0014] The present invention also provides a construction method, characterized in that the jacking construction system is used to carry out jacking construction on the steel box girder, the number of the intermediate jacking supports is 4, namely, a first intermediate jacking support, a second intermediate jacking support, a third intermediate jacking support, and a fourth intermediate jacking support, and the construction method comprises the following steps: S10, installing the starting jacking support, the first intermediate jacking support, the second intermediate jacking support, the third intermediate jacking support, the fourth intermediate jacking support, the reaction jacking support, the cross jacking support, and the terminal jacking support along the jacking direction of the steel box girder; S20, placing the assembled steel box girder on the starting jacking support, the first to fourth intermediate jacking supports, the reaction jacking support, the cross jacking support, and the terminal jacking support; S30, debugging the thruster; S40, start the jacking device to gradually drag the steel box girder, and the steel box girder gradually separates from the starting jacking support, the first intermediate jacking support, the second intermediate jacking support, the third intermediate jacking support, and the fourth intermediate jacking support, and the jacking is completed.

[0015] Compared with the traditional technical solution, the beneficial effects of the present invention are: 1) The slideway is constructed by the slideway assembly on the upper side of the temporary jacking support assembly. The jacking device drags the force-transmitting steel strand to push the steel box girder along the slideway. There is no need to repeatedly lift, lower and reset, which improves the construction efficiency. The temporary jacking support assembly has a good supporting effect on the steel box girder. 2) The slideway beam supports the slide plate; 3) The support truss supports the support beam, strengthens the support rod to improve the overall strength, and the inclined support column prevents the top push bracket from collapsing and improves the load capacity; 4) The third inclined support column is connected to the permanent pier to reduce the impact of the jacking force of the jacking device on the reaction jacking support; 5) The distribution beam and the bottom support steel pipe further enhance the stability of the lower part of the reaction force jacking bracket. When the jacking device is working, the stability of the reaction force jacking bracket is better; 6) The construction method has fewer construction steps, high construction efficiency and low safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A working diagram of a jacking construction system provided for one embodiment of the present invention; Figure 2-Figure 10 A working diagram of S41-S48 in a construction method provided by one embodiment of the present invention; Fig.11 for Figure 1 A top view of Fig.12 A structural diagram of a starting push support provided by an embodiment of the present invention; Fig.13 A three-dimensional diagram of a starting push support provided for one embodiment of the present invention; Fig.14 A structural diagram of an intermediate push support provided in accordance with an embodiment of the present invention; Fig.15 A three-dimensional diagram of an intermediate push support provided for one embodiment of the present invention; Fig.16 A structural diagram of a reaction force jacking support provided in one embodiment of the present invention; Fig.17 A three-dimensional diagram of a reaction force jacking support provided by one embodiment of the present invention; Fig.18 A structural diagram of a cross-over push support provided in accordance with an embodiment of the present invention; Fig.19 A three-dimensional diagram of a cross-over push support provided for one embodiment of the present invention; Fig. 20 A structural diagram of a terminal jacking support provided in one embodiment of the present invention; Fig.21 A three-dimensional diagram of a terminal push support provided by one embodiment of the present invention; Fig. 22 A structural diagram of a push assembly provided for one embodiment of the present invention; Fig.23 An installation diagram of an anchor puller provided for one embodiment of the present invention; Fig.24A structural diagram of an anchor puller provided for one embodiment of the present invention.

[0017] exist Figure 1-Figure 24 1. Starting jacking bracket; 101. First supporting beam; 102. First supporting column; 103. First reinforcing supporting rod; 104. First oblique supporting column; 2. First intermediate jacking bracket; 201. Second supporting beam; 202. Second supporting column; 203. Second reinforcing supporting rod; 204. Second oblique supporting column; 205. Intermediate supporting column; 3. Second intermediate jacking bracket; 4. Third intermediate jacking bracket; 5. Fourth intermediate jacking bracket; 6. Counter-force jacking bracket; 601. Third supporting beam; 602. Third supporting column; 603. Third reinforcing supporting rod; 604. Third oblique supporting column; 605. Distribution beam; 606. Bottom supporting steel pipe; 7. Cross-over jacking bracket ;701, fourth supporting beam;702, fourth supporting column;703, fourth reinforcing supporting rod;704, fourth oblique supporting column;8, terminal jacking bracket;801, fifth supporting beam;802, fifth supporting column;803, fifth reinforcing supporting rod;804, fifth oblique supporting column;9, slideway assembly;901, slideway beam;902, slide plate;10, force-transmitting steel strand;11, jacking device;1101, reaction seat;12, steel box beam;13, guide beam;14, anchor puller;1401, anchor plate;14011, anchor hole;1402, stiffening plate;15, permanent pier;16, first supporting pier;17, second supporting pier;18, third supporting pier;19, existing road. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings.

[0019] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "top", "bottom", "left", "right", "front", "back", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0020] Please refer to Figure 1-Figure 24An embodiment of the present invention provides a steel box girder 12 lifting and pushing construction system for constructing a temporary support slideway, comprising a pushing assembly for pushing the steel box girder 12, a temporary pushing support assembly for supporting the steel girder box, the pushing assembly comprising a force-transmitting steel strand 10, and a pushing device 11 for pulling the force-transmitting steel strand 10, the force-transmitting steel strand 10 is connected to the steel box girder 12, the pushing device 11 is arranged longitudinally, one end of the steel box girder 12 is detachably provided with a guide beam 13, the pushing device 11 pulls the The force-transmitting steel strand 10 pushes the steel box girder 12 to move, and the temporary pushing support assembly includes a starting pushing support 1, multiple intermediate pushing supports, a reaction pushing support 6, a cross pushing support 7, and a terminal pushing support 8 arranged in sequence. At least one slideway assembly 9 is fixedly arranged on the upper side of the starting pushing support 1, the upper side of the multiple intermediate pushing supports, the upper side of the reaction pushing support 6, the upper side of the cross pushing support 7, and the upper side of the terminal pushing support 8, respectively. The pusher 11 is detachably arranged on the reaction pushing support 6.

[0021] Specifically, the jacking device 11 adopts a hydraulic continuous jack, and two slideway assemblies 9 are symmetrically arranged on the upper side of the starting jacking support 1, the upper side of multiple intermediate jacking supports, the upper side of the reaction jacking support 6, the upper side of the cross jacking support 7, and the upper side of the terminal jacking support 8. The slideway is constructed along the jacking direction of the steel box girder 12. The jacking device 11 drags the force transmission steel strand 10 to drive the steel box girder 12 to move along the slideway. There is no need to repeatedly lift, lower and reset, which improves construction efficiency and makes the jacking device 11 more convenient to maintain.

[0022] The starting jacking support 1 supports the tail of the steel box girder 12, the middle jacking support supports the middle of the steel box girder 12, the reaction jacking support 6 supports the guide beam 13, and the steel box girder 12 gradually moves toward the terminal jacking support 8. The cross-jacking assembly supports the steel box girder 12 in this process, and it can be well supported during the entire movement process, with good construction stability.

[0023] like Figure 1-Figure 24 As shown, the slide assembly 9 includes a slide beam 901 and a slide plate 902 fixedly arranged on the upper side of the slide beam 901. The slide plate 902 is arranged longitudinally, and the slide beam 901 supports the slide plate 902. The slide plate 902 is made of MGB engineering plastic alloy, which reduces friction, has high strength, and has good load-bearing capacity.

[0024] like Figure 1-Figure 24As shown, the starting pushing bracket 1 includes a first supporting beam 101, two first supporting trusses symmetrically arranged at intervals on the lower side of the first supporting beam 101, the first supporting trusses include four first supporting columns 102 vertically arranged on the lower side of the first supporting beam 101, and multiple first reinforcing support rods 103 fixedly arranged on the first supporting columns 102, the four first supporting columns 102 are symmetrically arranged in pairs, the first supporting beam 101 extends laterally, at least one of the first supporting trusses is close to the first supporting column 102 of the intermediate pushing bracket and is fixedly provided with a first oblique support column 104, specifically, two of the first supporting trusses are close to the first supporting columns 102 of the intermediate pushing bracket and are fixedly provided with a first oblique support column 104, the first supporting beam 101 adopts double H-shaped steel, the first reinforcing support rod 103 adopts channel steel, and multiple first reinforcing support rods 103 form oblique supports or scissors struts to strengthen the overall stiffness of the starting pushing bracket 1 and improve the load-bearing capacity, and the first oblique support columns 104 prevent the first supporting truss from collapsing.

[0025] like Figure 1-Figure 24 As shown, the number of the intermediate pushing brackets is 4, namely the first intermediate pushing bracket 2, the second intermediate pushing bracket 3, the third intermediate pushing bracket 4, and the fourth intermediate pushing bracket 5, which have the same structure. The first intermediate pushing bracket 2 includes a second supporting beam 201, and two second supporting trusses symmetrically arranged at intervals on the lower side of the second supporting beam 201. The second supporting trusses include four second supporting columns 202 vertically arranged on the lower side of the second supporting beam 201, and a plurality of second reinforcing support rods 203 fixedly arranged on the second supporting columns 202. The four second supporting columns 202 are symmetrically arranged in pairs, and the two second reinforcing support rods 203 are fixedly arranged on the second supporting columns 202. An intermediate support column 205 is arranged between the second support trusses, and the upper end of the intermediate support column 205 is fixedly connected to the second support beam 201, and the second support beam 201 extends in the transverse direction. At least one second support column 202 in the second support truss that is away from the starting pushing bracket 1 is fixedly provided with a second oblique support column 204. The second support beam 201 adopts double H-shaped steel, and the second reinforcing support rod 203 adopts channel steel. Multiple second reinforcing support rods 203 form oblique supports or scissors struts to improve the overall stiffness of the intermediate pushing bracket and the load-bearing capacity. The second oblique support column 204 prevents the second support truss from collapsing.

[0026] like Figure 1-Figure 24As shown, the reaction force pushing bracket 6 includes a third supporting beam 601, two rows of third supporting columns 602 vertically arranged on the lower side of the third supporting beam 601, and a plurality of third reinforcing support rods 603 arranged on the third supporting columns 602. The two rows of the third supporting columns 602 are arranged side by side, and the third supporting columns 602 in each row are arranged equidistantly. The third supporting columns 602 in a row close to the middle pushing bracket are provided with a first supporting pier 15 on the periphery, and a third inclined supporting column 604 is fixedly provided between the third supporting columns 602 in a row close to the middle pushing bracket and the first supporting pier 15. A reaction seat 1101 is installed on the third supporting beam 601, and the pushing device 11 is installed In the reaction seat 1101, the third supporting beam 601 adopts double H-shaped steel, and the third reinforcing support rod 603 adopts channel steel. Multiple third reinforcing support rods 603 form an oblique support or a scissors support. When the steel box girder 12 is pushed into place, the first supporting pier 15 can support the tail of the steel box girder 12. The reaction pushing bracket 6 is arranged near the first supporting pier 15. When the thruster 11 drags the force transmission steel strand 10, the third oblique support column 604 will transmit the force to the first supporting pier 15, reducing the impact of the thrust of the thruster 11 on the reaction pushing bracket 6. By separately arranging the reaction pushing bracket 6, it is ensured that the reverse thrust of the thruster 11 can be withstood during the pushing process, and the stability during the pushing process is good.

[0027] like Figure 1-Figure 24 As shown, the cross-over pushing bracket 7 includes a fourth supporting beam 701, four fourth supporting columns 702 vertically arranged on the lower side of the fourth supporting beam 701, and a plurality of fourth reinforcing support rods 703 arranged on the fourth supporting columns 702. The four fourth supporting columns 702 are symmetrically arranged in pairs, and the two fourth supporting columns 702 facing away from the reaction pushing bracket 6 are respectively provided with a fourth oblique support column 704. The fourth supporting beam 701 adopts double H-shaped steel, and the fourth reinforcing support rod 703 adopts channel steel. Multiple fourth reinforcing support rods 703 form scissors struts or oblique struts. The cross-over pushing bracket 7 is generally arranged in the center of the existing road 19, and the reaction pushing bracket 6 and the terminal pushing bracket 8 are respectively located on both sides of the existing road 19, so that the steel box girder 12 is supported during the movement process to improve the movement stability.

[0028] like Figure 1-Figure 24As shown, the terminal pushing bracket 8 includes a fifth supporting beam 801, two rows of fifth supporting columns 802 vertically arranged on the lower side of the fifth supporting beam 801, and a plurality of fifth reinforcing support rods 803 arranged on the fifth supporting columns 802. Each of the fifth supporting columns 802 away from the row of the cross-pushing bracket 7 is provided with a fifth oblique support column 804. The fifth supporting beam 801 adopts double H-shaped steel, and the fifth reinforcing support rod 803 adopts channel steel. Multiple fifth reinforcing support rods 803 form scissors struts or oblique struts to improve the overall stiffness of the terminal pushing bracket 8 and the load-bearing capacity. The fifth oblique support column 804 prevents the fifth support column 802 from collapsing.

[0029] like Figure 1-Figure 24 As shown, a distribution beam 605 is provided at the lower end of the third support column 602, and a plurality of bottom support steel pipes 606 are provided at the lower side of the distribution beam 605. The distribution beam 605 and the bottom support steel pipes 606 further enhance the stability of the lower part of the reaction force pushing bracket 6 and improve the load bearing capacity.

[0030] like Figure 1-Figure 24 As shown, at least one anchor 14 is arranged at the lower side of the steel box girder 12, and the force transmission steel strand 10 is connected to the anchor 14. The anchor 14 includes an anchor plate 1401, an anchor hole 14011 is arranged in the middle of the anchor plate 1401, and a stiffening plate 1402 is arranged on one side of the anchor plate 1401. The number of the force transmission steel strands 10 is 14, and the 14 force transmission steel strands 10 pass through the anchor holes 14011 and are fixedly connected to the anchor 14. During on-site construction, the number of anchors 14 is set according to the length of the steel box girder 12.

[0031] See also Figure 1-Figure 24 The present invention also provides a construction method, using the jacking construction system to perform jacking construction on the steel box girder 12, the number of the intermediate jacking brackets is 4, namely the first intermediate jacking bracket 2, the second intermediate jacking bracket 3, the third intermediate jacking bracket 4, and the fourth intermediate jacking bracket 5, the number of the jacking devices 11 is 2, and the construction method comprises the following steps: S10, installing the starting jacking support 1, the first intermediate jacking support 2, the second intermediate jacking support 3, the third intermediate jacking support 4, the fourth intermediate jacking support 5, the reaction jacking support 6, the cross jacking support 7, and the terminal jacking support 8 along the jacking direction of the steel box girder 12; S20, placing the assembled steel box girder 12 on the starting jacking support 1, the first to fourth intermediate jacking supports, the reaction jacking support 6, the cross jacking support 7, and the terminal jacking support 8; S30, debugging the thruster 11; S40, start the jacking device 11 to gradually drag the steel box girder 12, and the steel box girder 12 gradually separates from the starting jacking support 1, the first intermediate jacking support 2, the second intermediate jacking support 3, the third intermediate jacking support 4, and the fourth intermediate jacking support 5, and the jacking is completed. The specific steps are: S41, the steel box girder 12 is pushed up by 17.5m, and the tail of the steel box girder 12 is separated from the starting pushing support 1; S42, the steel box girder 12 is pushed up by a total of 41.75 m, that is, the steel box girder 12 is pushed up by another 24.25 m on the basis of S41, and the guide beam 13 enters the cross-pushing support 7; S43, the steel box girder 12 is pushed for a total of 48 m, that is, the steel box girder 12 is pushed for another 6.25 m on the basis of S42, and the tail of the steel box girder 12 is separated from the first intermediate pushing support 2; S44, the steel box girder 12 is pushed for a total of 77 m, that is, the steel box girder 12 is pushed for another 29 m on the basis of S43, and the tail of the steel box girder 12 is separated from the second intermediate pushing support 3; S45, the steel box girder 12 is pushed up for a total of 104.5 m, that is, the steel box girder is pushed up for another 27.5 m on the basis of S44, and the guide beam 13 enters the terminal pushing support 8; S46, the steel box girder 12 is pushed up for a total of 107 m, that is, the steel box girder is pushed up for another 2.5 m on the basis of S45, and the tail of the steel box girder 12 is separated from the third intermediate pushing support 4; S47, the steel box girder 12 is pushed up for a total of 135.5 m, that is, the steel box girder is pushed up for another 28.5 m on the basis of S46, and the tail of the steel box girder 12 is separated from the fourth intermediate pushing support 5; S48, push the steel box girder 12 for a total of 151.85m, that is, push the steel box girder 12 for another 16.35m on the basis of S46, push the steel box girder 12 to the designated position, and the pushing is completed; S50, after the jacking is completed, the jacking bracket and the guide beam 13 are removed, and the steel box beam 12 falls on the second supporting pier 16, the third supporting pier 17 and the fourth supporting pier 18 after jacking. The second supporting pier 16, the third supporting pier 17 and the fourth supporting pier 18 are generally dropped by vertical jacks.

[0032] Specifically, the configuration calculation of the force-transmitting steel strand 10 is as follows: The total traction weight is 1450t (weight of steel box beam 12) + 40t (weight of guide beam 13) = 1490t, the sliding force is 1490t×sin(0.29°)=7.5t, the dry friction coefficient of the friction pair during traction is 0.15 (steel has lubricated friction against steel): 1490t×0.15=223.5t, and the force required for traction is 223.5+7.5=231t.

[0033] The force transmission steel strand 10 is a steel strand with a diameter of Φ15.24 and a strength grade of 1860Mpa. The breaking force of a single strand is not less than 260kN. There are 14 strands. The safety factor of the force transmission steel strand 10 is 2×14×260÷2235=3.25.

[0034] The hydraulic pump source system controls the jacking device 11 to tow and provides hydraulic power for the jacking device 11, and completes corresponding actions under the control of various hydraulic valves. The design of the hydraulic pump source system adopts a modular structure. According to the arrangement of the jacking points of the jacking weights, the number of jacking devices 11 and the hydraulic pump source flow rate, a combination of multiple modules can be performed. Each set of modules is based on a set of hydraulic pump source systems as the core, and can independently control a group of jacking devices 11. At the same time, a proportional valve block box can be used for multi-hanging point expansion to meet the actual needs of various types of jacking projects.

[0035] The operator can observe the hydraulic jacking process and related data and (or) issue control instructions through the human-machine interface of the hydraulic synchronous computer control system in the central control room. The hydraulic synchronous jacking system equipment adopts bus control and three-level control from the main controller to the jacking device 11, realizing independent real-time monitoring and adjustment of each jacking device 11 in the system. It adopts stroke and displacement sensor monitoring and computer control, and can automatically realize multiple functions such as synchronous action, load balancing, posture correction, stress control, operation interlock, process display and fault alarm through data feedback and control instruction transmission.

[0036] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. In the description of this specification, the description of the reference term "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this specification. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0037] The above description is only an example of one or more embodiments of the present specification and is not intended to limit one or more embodiments of the present specification. For those skilled in the art, one or more embodiments of the present specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present specification shall be included in the scope of the claims.

Claims

1. A steel box girder hoisting and jacking construction system for constructing a temporary support slideway, characterized in that: include: A pushing assembly for pushing a steel box girder comprises a force transmission steel strand and a pusher for pulling the force transmission steel strand, wherein the force transmission steel strand is connected to the steel box girder, the pusher pulls the force transmission steel strand to push the steel box girder to move, and a guide beam is detachably provided at one end of the steel box girder; A temporary jacking support assembly for supporting a steel beam box comprises a starting jacking support, a plurality of intermediate jacking supports, a reaction jacking support, a cross jacking support and a terminal jacking support which are arranged in sequence, at least one slideway assembly is fixedly arranged on the upper side of the starting jacking support, the upper side of the plurality of intermediate jacking supports, the upper side of the reaction jacking support, the upper side of the cross jacking support and the upper side of the terminal jacking support respectively, and the jacking device is detachably arranged on the reaction jacking support.

2. The steel box girder hoisting and jacking construction system for constructing a temporary support slideway according to claim 1 is characterized in that: The slideway assembly comprises a slideway beam and a slide plate fixedly arranged on the upper side of the slideway beam, and the slide plate is arranged in the longitudinal direction.

3. The steel box girder hoisting and jacking construction system for constructing a temporary support slideway according to claim 1 is characterized in that: The starting pushing bracket includes a first supporting beam, two first supporting trusses symmetrically arranged at intervals on the lower side of the first supporting beam, the first supporting trusses include four first supporting columns vertically arranged on the lower side of the first supporting beam, and a plurality of first reinforcing support rods fixedly arranged on the first supporting columns, the four first supporting columns are symmetrically arranged in pairs, the first supporting beam extends laterally, and at least one of the first supporting trusses is fixedly provided with a first inclined support column close to the first support column of the intermediate pushing bracket.

4. The steel box girder hoisting and jacking construction system for constructing a temporary support slideway according to claim 1 is characterized in that: The intermediate pushing bracket includes a second supporting beam, two second supporting trusses symmetrically arranged at intervals on the lower side of the second supporting beam, the second supporting trusses include four second supporting columns vertically arranged on the lower side of the second supporting beam, and a plurality of second reinforcing support rods fixedly arranged on the second supporting columns. The four second supporting columns are symmetrically arranged in pairs, and an intermediate supporting column is arranged between the two second supporting trusses. The upper end of the intermediate supporting column is fixedly connected to the second supporting beam, and the second supporting beam extends laterally. At least one second supporting column of the second supporting trusses that is away from the second supporting column of the starting pushing bracket is fixedly provided with a second inclined support column.

5. The steel box girder hoisting and jacking construction system for constructing a temporary support slideway according to claim 1 is characterized in that: The reaction-force pushing bracket includes a third supporting beam, two rows of third supporting columns vertically arranged on the lower side of the third supporting beam, and a plurality of third reinforcing support rods arranged on the third supporting columns. The two rows of the third supporting columns are arranged side by side, and the third supporting columns in each row are arranged equidistantly. Permanent piers are arranged on the periphery of the third supporting columns in a row close to the middle pushing bracket, and a third inclined support column is fixedly arranged between the third supporting columns in a row close to the middle pushing bracket and the permanent pier.

6. The steel box girder hoisting and jacking construction system for constructing a temporary support slideway according to claim 1 is characterized in that: The cross-pushing bracket includes a fourth supporting beam, four fourth supporting columns vertically arranged on the lower side of the fourth supporting beam, and a plurality of fourth reinforcing support rods arranged on the fourth supporting columns. The four fourth supporting columns are symmetrically arranged in pairs, and two of the fourth supporting columns facing away from the reaction-force pushing bracket are respectively provided with a fourth oblique support column.

7. The steel box girder hoisting and jacking construction system for constructing a temporary support slideway according to claim 1 is characterized in that: The terminal pushing bracket includes a fifth supporting beam, two rows of fifth supporting columns vertically arranged on the lower side of the fifth supporting beam, and a plurality of fifth reinforcing support rods arranged on the fifth supporting columns. Each of the fifth supporting columns away from a row of the cross-pushing brackets is provided with a fifth oblique support column.

8. The steel box girder hoisting and jacking construction system for constructing a temporary support slideway according to claim 5, characterized in that: A distribution beam is arranged at the lower end of the third support column, and a plurality of bottom support steel pipes are arranged at the lower side of the distribution beam.

9. The monitoring method according to claim 1, characterized in that: At least one anchor is arranged on the lower side of the steel box girder, and the force-transmitting steel strand is connected to the anchor.

10. A construction method, characterized in that: The jacking construction system according to any one of claims 1 to 9 is used to carry out jacking construction on the steel box girder, the number of the intermediate jacking supports is 4, namely, the first intermediate jacking support, the second intermediate jacking support, the third intermediate jacking support, and the fourth intermediate jacking support, and the construction method comprises the following steps: S10, installing the starting jacking support, the first intermediate jacking support, the second intermediate jacking support, the third intermediate jacking support, the fourth intermediate jacking support, the reaction jacking support, the cross jacking support, and the terminal jacking support along the jacking direction of the steel box girder; S20, placing the assembled steel box girder on the starting jacking support, the first to fourth intermediate jacking supports, the reaction jacking support, the cross jacking support, and the terminal jacking support; S30, debugging the thruster; S40, start the jacking device to gradually drag the steel box girder, and the steel box girder gradually separates from the starting jacking support, the first intermediate jacking support, the second intermediate jacking support, the third intermediate jacking support, and the fourth intermediate jacking support, and the jacking is completed.

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