Multi-span cast-in-situ beam mobile support structure system and construction method thereof

Abstract

The application discloses a kind of multi-span cast-in-place beam mobile support structure system and its construction method, including several groups of mobile support, anchoring system, distribution beam and unloading block, several groups of mobile support are set along the transverse and longitudinal direction of bridge;The mobile support includes: bearing truss, column, longitudinal beam, crossbeam, walking mechanism and jacking mechanism;The bearing truss is fixed along the two sides of bridge longitudinal direction by column, the upper end of the column and the bearing truss is fixed with longitudinal beam, the lower end of the two side columns of the bearing truss is fixed by crossbeam respectively;Multiple groups of walking mechanism and multiple groups of jacking mechanism are fixed below the crossbeam, the walking mechanism is set as mobile support can be driven to walk;The anchoring system includes tensioning screw rod and connecting cross brace, the web of the crossbeam is provided with opening hole.The application improves the utilization rate of support structure, solves the problem that the number of common support erection and disassembly is large, the cost is too large and cannot be moved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bridge engineering, and more particularly to a multi-span cast-in-place beam mobile support structure system and a construction method thereof. BACKGROUND

[0002] With the rapid development of cities, the traffic capacity of the original road has not been able to meet the actual traffic demand, and the reconstruction and expansion of urban roads has become a trend of social development. The common method for the reconstruction and expansion of urban roads is to widen the original road or build an elevated bridge on the original road. The elevated bridge can meet the long-distance and high-efficiency traffic demand, promote the development of cities in different dimensions of space and time, and gradually become the lifeline of urban traffic.

[0003] The common construction methods for the cast-in-place construction of the main girder of urban elevated bridges include the hanging basket construction, the full-support construction, the beam support construction, and the mobile formwork construction. However, due to the particularity of the construction of the reconstructed and expanded elevated bridges, there are insufficient construction space, short construction period, and high requirements for green and civilized construction, and the selection of the cast-in-place main girder construction process is required to be higher.

[0004] The hanging basket construction method has a long construction period and is not suitable for bridges with varying cross-sectional widths. The full-support construction method and the beam support construction method have many times of support material erection and dismantling, resulting in a long construction period and difficulty in meeting the construction period requirements. The design of the mobile formwork method is difficult, the investment cost is high, and it is not suitable for the construction of bridges with varying cross-sectional heights and widths. Therefore, it is of great significance to optimize the form of the support to adapt to the construction of the cast-in-place beam of the reconstructed and expanded urban roads. SUMMARY

[0005] The purpose of the present application is to provide a multi-span cast-in-place beam mobile support structure system and a construction method thereof, which improves the utilization rate of the support structure and solves the problems of too many times of erection and dismantling of the common support, high cost, and immobility.

[0006] The technical solution adopted by the present application to solve the technical problem is: a multi-span cast-in-place beam mobile support structure system, which is composed of a plurality of groups of mobile supports, an anchoring system, a distribution beam, and unloading blocks, and the plurality of groups of mobile supports are arranged along the transverse and longitudinal directions of the bridge.

[0007] The mobile support comprises a bearing truss, a stand, a longitudinal beam, a cross beam, a walking mechanism, and a jacking mechanism. The bearing truss is fixed on both sides along the longitudinal direction of the bridge through the stand. The stand and the upper end of the bearing truss are fixed with the longitudinal beam. The lower ends of the stand on both sides of the bearing truss are fixed through the cross beam. A plurality of groups of walking mechanisms and a plurality of groups of jacking mechanisms are fixed below the cross beam. The walking mechanism is arranged to drive the mobile support to walk.

[0008] The anchoring system comprises a tension screw and a connecting cross brace, the web of the cross beam is provided with an opening, two cross beams of a single mobile support are connected and fixed by the tension screw, and the connecting cross brace connects two longitudinally and transversely adjacent mobile supports into a whole;

[0009] The distribution beam is placed on the longitudinal beam, and the distribution beam is composed of transverse bridge direction's bailey beam and longitudinal bridge direction's profile steel connection, and the transverse bridge direction's adjacent bailey beams are cross arranged;

[0010] The unloading block is removably supported under the cross beam.

[0011] Preferably, the load-bearing truss is welded into a truss structure by steel pipes, and the steel pipes of the load-bearing truss and the stand are connected and fixed by butt flanges and bolts.

[0012] Preferably, a set of jacking mechanisms is arranged at the corresponding cross beam directly below each stand.

[0013] Preferably, the jacking mechanism is a jack, and the jack is welded to the inner side of the cross beam through a reinforcing plate.

[0014] Preferably, the walking mechanism comprises an electric walking wheel and a seat body.

[0015] The seat body is connected with the electric walking wheel, and the seat body and the cross beam are fixed by bolts.

[0016] Preferably, each group of cast-in-place beams has multiple groups, and each group divides the mobile supports into three mobile support units along the transverse bridge direction, and the mobile supports in the mobile support unit are connected into a whole by the anchoring system.

[0017] Each mobile support unit is provided with the obstacle removing mechanism, which comprises a plurality of obstacle removing units arranged on a circle of seat bodies outside the mobile support unit, and corresponds to the electric walking wheels on the circle one by one.

[0018] The obstacle removing unit comprises:

[0019] A distance sensor is arranged on the seat body, the seat body extends along the moving direction of the electric walking wheel, the distance sensor is fixed symmetrically on both sides of the moving direction of the electric walking wheel, and the distance sensor is arranged to detect the distance from the ground vertically.

[0020] The first pushing mechanism comprises an electric track, an electric push rod, a connecting disc and a push plate; the electric track is fixed on the seat body perpendicularly to the moving direction of the electric walking wheel, and the connecting line of the electric track and the distance sensor is parallel to the shaft of the electric walking wheel; the electric push rod is movably arranged on the electric track through a sliding block; the telescopic end of the electric push rod is fixed with the connecting disc; the connecting disc is connected with the push plate; and the push plate is arranged perpendicularly to the ground.

[0021] The second pushing mechanism has the same structure as the first pushing mechanism, is arranged on the seat body and located between the first pushing mechanism and the electric walking wheel, the electric track of the second pushing mechanism is parallel to the electric track of the first pushing mechanism, the starting end of the electric track of the second pushing mechanism and the terminal end of the electric track of the first pushing mechanism are staggered, and the terminal end of the electric track of the second pushing mechanism extends away from the terminal end of the electric track of the first pushing mechanism; that is, the first pushing mechanism and the second pushing mechanism are both two groups.

[0022] The controller receives the information of the distance sensor and controls the electric walking wheel, the first pushing mechanism and the second pushing mechanism.

[0023] Preferably, the unloading block is combined by a sand box and an elevation adjusting block.

[0024] The application also provides a construction method of a mobile support structure system of a multi-span cast-in-place beam, comprising the following steps:

[0025] S1: determining the width and quantity of the mobile support according to the width of the cast-in-place beam;

[0026] S2: preparing materials according to the determined width and quantity of the mobile support, and welding and assembling the materials on the construction site;

[0027] S3: walking along the longitudinal bridge first by operating the walking mechanism, and then walking along the transverse bridge to the designated position by switching the direction of the walking mechanism;

[0028] S4: after walking to the position, lowering the jacking mechanism, lifting the support to the design elevation, installing the sand box and the elevation adjusting block, retracting the jacking mechanism after the conversion of the support system, finally connecting the transverse beams of the mobile supports into a whole along the longitudinal and transverse directions through the anchoring system, and fixing the distribution beam on the bolt holes of the Bailey beam through the pressing plate at the position where the transverse Bailey beams of the two support structure systems are staggered;

[0029] S5: after the cast-in-place beam construction is completed and meets the design requirements, lowering the jacking mechanism, retracting the jacking mechanism after removing the unloading block, reducing the height of the mobile support, and automatically demolding the concrete.

[0030] S6: After the mobile support system falls back, the walking mechanism is operated to move to the designed position for the construction of the next cast-in-place beam.

[0031] Preferably, the cast-in-place beam has multiple drops, each cast-in-place beam has multiple drops, and each cast-in-place beam divides the mobile support into three groups of mobile support units along the transverse direction of the bridge, and the mobile supports in the mobile support units are connected into a whole through the anchoring system;

[0032] The specific construction steps of the next cast-in-place beam after the completion of the construction of the cast-in-place beam include the following steps:

[0033] S61: After the first cast-in-place beam is demolded, the pressing plate above the Bailey beam is contacted to enable the three groups of mobile support units to move freely, the mobile support unit on the inner side is walked along the forward direction of the road to stop at the third cast-in-place beam;

[0034] S62: The mobile support unit in the middle needs to move laterally to the inner side of the bridge, the connecting cross brace between the mobile supports on the outer side of the pier and the mobile support unit in the middle is removed, the mobile support unit in the middle is moved laterally to the inner side by a certain distance, then the mobile support is supported to a certain height through the jacking mechanism, then the direction of the electric walking wheel is changed and installed, then the mobile support is lowered through the jacking mechanism, and the mobile support unit in the middle is moved to the middle pouring position of the second cast-in-place beam along the forward direction of the road;

[0035] S63: The mobile support unit in the middle is supported to a certain height through the jacking mechanism, then the direction of the electric walking wheel is changed and installed, then the mobile support is lowered through the jacking mechanism, and the mobile support unit in the middle is moved to the middle pouring position of the second cast-in-place beam from the inner side and the connecting cross brace removed from the mobile support unit in the middle is installed;

[0036] S64: The mobile support unit on the inner side is retracted to the inner side pouring position of the second cast-in-place beam;

[0037] S65: Similarly, the mobile support unit on the outer side is moved to the outer side pouring position of the second cast-in-place beam;

[0038] S66: After all the mobile support units reach the designated position of the second cast-in-place beam, all the mobile support units are supported and changed through the jacking mechanism, the mobile support units are adjusted to the designed pouring elevation of the beam section, then the height changing blocks, unloading blocks and anchoring systems are added, the three groups of mobile support units are connected into a whole, and finally the jacking mechanism is retracted to support and change.

[0039] Preferably, the controller is configured to:

[0040] During the walking of the mobile support unit, the distance sensor transmits a distance signal to the controller, and when the monitored distance is less than the set distance, the controller controls the walking mechanism of the mobile support unit to stop;

[0041] The electric push rod of the first pushing mechanism is controlled to push the push plate downward to a set distance, and then the electric push rod of the first pushing mechanism is controlled to move on the electric track for a set distance to push the obstacle for a distance, and then the controller controls each component of the first pushing mechanism to return to the initial position;

[0042] The moving support unit is controlled to walk for a set distance, which is the distance between the first pushing mechanism and the second pushing mechanism;

[0043] According to the pushing distance set by the first pushing mechanism and the set distance of the electric track of the second pushing mechanism, the obstacle is close to the push plate of the second pushing mechanism, the electric push rod of the second pushing mechanism is controlled to push the push plate downward to a set distance, and then the electric push rod of the second pushing mechanism is controlled to move on the electric track for a set distance to push the obstacle for a distance again, and then the controller controls each component of the second pushing mechanism to return to the initial position.

[0044] The present application at least includes the following beneficial effects:

[0045] 1. The moving support unit is provided with a walking mechanism which can walk along the bridge direction and the transverse bridge direction, so that the support structure has the function of bidirectional movement, and the obstruction of the pier column can be effectively avoided during the movement, the utilization rate of the support structure is improved, and the problem of frequent assembly and disassembly of the commonly used support structure, high cost and immobility is solved.

[0046] 2. The pouring construction of the irregular beam body is realized by the moving support unit, the problem that the hanging basket or other walking support cannot adapt to the variable cross-section box girder pouring construction is solved, and the difficulty of the box girder pouring construction is reduced.

[0047] 3. The materials for assembling the structure of the present application are easy to purchase and easy to assemble, and do not need to be separately customized to cause non-circulation use, thereby reducing the purchase cost.

[0048] 4. The support only needs to be assembled and disassembled once to complete the construction of the whole bridge of the project, reduces the safety risk of workers in high altitude assembling and disassembling the support, saves the assembly and disassembly time, and solves the problem of tight construction period of urban reconstruction and expansion projects.

[0049] Other advantages, objects and features of the present application will be partly embodied by the following description, and partly understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 is the elevation view of the moving support structure system of the present application;

[0051] Figure 2 is the sectional view of the moving support structure system of the present application;

[0052] Figure 3is a schematic diagram of the distribution beam structure of the present application;

[0053] Figure 4 is a bottom view of the obstacle removing unit of the present application;

[0054] Figure 5 is a schematic diagram of the step S4 construction of the present application;

[0055] Figure 6 is a schematic diagram of the S61 construction of the present application;

[0056] Figure 7 is a schematic diagram of the S61 construction of the present application;

[0057] Figure 8 is a schematic diagram of the lateral movement of the middle moving support unit of the present application in S62 to the inside of the bridge;

[0058] Figure 9 is a schematic diagram of the S63 construction of the present application;

[0059] Figure 10 is a schematic diagram of the S64 construction of the present application;

[0060] Figure 11 is a schematic diagram of the S66 construction of the present application.

[0061] BRIEF DESCRIPTION OF DRAWINGS 1 bearing truss, 2 cross beam, 3 anchoring system, 31 pair of tensioning screws, 32 connecting cross brace, 4 distribution beam, 5 unloading block, 6 walking mechanism, 7 jacking mechanism, 8 stand column, 9 longitudinal beam, 10 Bailey beam, 11 section steel, 12 inside moving support unit, 13 middle moving support unit, 14 outside moving support unit, 15 pier, 16 distance sensor, 17 first jacking mechanism, 18 second jacking mechanism, 19 electric walking wheel, 20 seat body, 21 electric track, 22 electric push rod, 23 connecting disc, 24 push plate. DETAILED DESCRIPTION

[0062] The present application will be described in detail below with reference to the drawings. Those skilled in the art will be able to implement the present application based on these descriptions. Before the present application is described in detail with reference to the drawings, it is particularly important to note that the technical solutions and technical features provided in each part of the present application, including the following descriptions, can be combined with each other without conflict.

[0063] In addition, the embodiments of the present application involved in the following description are generally only embodiments of a part of the present application, not all embodiments. Therefore, all other embodiments obtained by those skilled in the art based on the embodiments in the present application without creative labor should be within the scope of protection of the present application.

[0064] The application will be further described in detail below with reference to the accompanying drawings and embodiments, and the specific implementation process is as follows:

[0065] As shown in the drawings, Figures 1-3 The application provides a multi-span cast-in-place beam mobile support structure system, which is composed of a plurality of groups of mobile supports, an anchoring system 3, a distribution beam 4 and unloading blocks 5, and the plurality of groups of mobile supports are arranged along the transverse and longitudinal directions of the bridge;

[0066] The mobile support comprises a bearing truss 1, a stand column 8, a longitudinal beam 9, a cross beam 2, a walking mechanism 6 and a jacking mechanism 7; the bearing truss 1 is fixed along the two sides in the longitudinal direction of the bridge through the stand column 8, the upper end of the stand column 8 and the bearing truss 1 is fixed with the longitudinal beam 9, and the lower end of the two stand columns 8 on the two sides of the bearing truss 1 is fixed through the cross beam 2; a plurality of groups of walking mechanisms 6 and a plurality of groups of jacking mechanisms 7 are fixed below the cross beam 2, and the walking mechanism 6 is arranged to drive the mobile support to walk on the ground;

[0067] The anchoring system 3 comprises a tensioning screw 31 and a connecting cross brace 32, the web plate of the cross beam 2 is provided with an opening, two cross beams 2 of a single mobile support are connected and fixed through the tensioning screw 31, and the connecting cross brace 32 connects two adjacent mobile supports in the longitudinal and transverse directions into a whole;

[0068] The distribution beam 4 is placed on the longitudinal beam 9, and the distribution beam 4 is composed of a transverse bridge direction bailey beam 10 and a longitudinal bridge direction profile steel 11, and the adjacent bailey beams 10 in the transverse bridge direction are arranged in cross.

[0069] The unloading block 5 is removably supported below the cross beam 2.

[0070] The technical solution can further include the following technical details to better achieve the technical effect: the bearing truss 1 is welded into a truss structure through steel pipes, and the stand column 8 and the steel pipes of the bearing truss 1 are fixed through butt flanges and bolts.

[0071] The technical solution can further include the following technical details to better achieve the technical effect: a group of jacking mechanisms 7 is arranged at the corresponding cross beam 2 directly below each stand column 8.

[0072] The technical solution can further include the following technical details to better achieve the technical effect: the jacking mechanism 7 is a jack, and the jack is welded on the inner side of the cross beam 2 through a reinforcing plate, and the jack plays the role of system conversion and auxiliary walking mechanism 6 steering.

[0073] The technical solution can further include the following technical details to better achieve the technical effect: the walking mechanism 6 comprises an electric walking wheel 19 and a seat body 20;

[0074] The seat body 20 is connected with the electric walking wheel 19, the seat body 20 is fixed with the cross beam 2 through bolts,

[0075] The walking mechanism 6 is driven by the motor, when steering is needed, the whole system is lifted by the jacking mechanism 7, so that the walking mechanism 6 is separated from the bottom surface, the electric walking wheel 19 is installed for steering, and the walking mechanism 6 realizes walking along the bridge direction and the transverse bridge direction.

[0076] The technical scheme can further include the following technical details to better achieve the technical effect: each joint cast-in-place beam has multiple groups, each joint divides the moving support into three groups of moving support units along the transverse bridge direction, and the moving supports in the moving support unit are connected into a whole through the anchoring system 3;

[0077] As shown in Figure 4 Each moving support unit is provided with the obstacle removing mechanism, which includes a plurality of obstacle removing units, the obstacle removing units are arranged on a circle of seat bodies 20 outside the moving support unit, and correspond to the electric walking wheels 19 in the circle one by one;

[0078] The obstacle removing unit includes:

[0079] The distance sensor 16 is arranged on the seat body 20, the seat body 20 extends along the moving direction of the electric walking wheel 19, the distance sensor 16 is fixed symmetrically on both sides of the moving direction of the electric walking wheel 19, and the distance sensor 16 is arranged to detect the distance from the ground vertically;

[0080] The first pushing mechanism 17 includes an electric track 21, an electric push rod 22, a connecting disc 23 and a push plate 24; the electric track 21 is fixed on the seat body 20 perpendicular to the moving direction of the electric walking wheel 19, and the connecting line between the electric track 21 and the distance sensor 16 is parallel to the shaft of the wheel body of the electric walking wheel 19; the electric push rod 22 is movably arranged on the electric track 21 through a sliding block, the telescopic end of the electric push rod 22 is fixed with the connecting disc 23, the connecting disc 23 is connected with the push plate 24, and the push plate 24 is arranged perpendicular to the ground;

[0081] Second pushing mechanism 18, which is the same structure as the first pushing mechanism 17, the second pushing mechanism 18 is arranged on the seat body 20 and located between the first pushing mechanism 17 and the electric walking wheel 19, and the electric track 21 of the second pushing mechanism 18 is parallel to the electric track 21 of the first pushing mechanism 17, the starting end of the electric track 21 of the second pushing mechanism 18 and the end of the electric track 21 of the first pushing mechanism 17 are staggered, and the end of the electric track 21 of the second pushing mechanism 18 extends away from the end of the electric track 21 of the first pushing mechanism 17; That is, the first pushing mechanism 17 and the second pushing mechanism 18 are both two groups, which are symmetrically fixed on both sides of the walking direction of the electric walking wheel 19;

[0082] The controller receives the information of the distance sensor 16 and controls the electric walking wheel 19, the first pushing mechanism 17 and the second pushing mechanism 18. The controller is arranged as follows:

[0083] During walking, the distance sensor 16 transmits the monitoring distance signal to the controller, and when the monitoring distance is less than the set distance, the controller controls the walking mechanism 6 of the mobile support unit to stop;

[0084] The electric push rod 22 of the first pushing mechanism 17 is controlled to push the push plate 24 downward to a set distance, and then the electric push rod 22 of the first pushing mechanism 17 is controlled to move on the electric track 21 by a set distance, so as to push the obstacle by a distance, and then the controller controls each part of the first pushing mechanism 17 to return to the initial position;

[0085] The walking distance of the mobile support unit is set, which is the distance between the first pushing mechanism 17 and the second pushing mechanism 18;

[0086] According to the pushing distance set by the first pushing mechanism 17 and the set distance of the electric track 21 of the second pushing mechanism 18, the obstacle approaches the push plate 24 of the second pushing mechanism 18, the electric push rod 22 of the second pushing mechanism 18 is controlled to push the push plate 24 downward to a set distance, and then the electric push rod 22 of the second pushing mechanism 18 is controlled to move on the electric track 21 by a set distance, so as to push the obstacle by a distance, and then the controller controls each part of the second pushing mechanism 18 to return to the initial position, so as to ensure that the obstacle does not affect the normal walking of the mobile support unit.

[0087] The technical scheme can further include the following technical details to better achieve the technical effect: the unloading block 5 is composed of a sand box and an elevation adjusting block, and during construction, the unloading block 5 is supported below the cross beam 2 to transmit the upper load to the foundation, while considering the function of adjusting the elevation of the support system.

[0088] As Figures 5-11As shown, the present example is a cast-in-place mobile support structure transverse and longitudinal section view used in the first section of Xiamen National Highway 324 double-line (Tong'an section) second phase improvement project. The main line bridge box girder top surface width is 26m, one span length is 30m, beam height is 1.8m, one joint three spans, and a total of 9 joints. The pier column is a double-column vase pier with an average height of 9m.

[0089] As shown, Figures 1-2 According to the width of the box girder, three mobile support combinations are selected for construction. The stand column 8 of the support uses 630mm steel pipe, the transverse spacing is 4.5m, 6m and 4.5m; the longitudinal spacing of the stand column 8 is 27m. The bearing truss 1 uses 600mm steel pipe, the longitudinal beam 9 of the bearing truss 1 uses 800mm H-shaped steel, and two rows of bearing trusses are welded into a whole through flat link inclined bracing to form a mobile support structure.

[0090] As shown, Figures 1-2 The bearing truss is placed above the cross beam 2, and the cross beam 2 uses 500mm H-shaped steel; four sets of walking mechanisms 6 are symmetrically welded below one cross beam 2. Four sets of jacking mechanisms 7 are symmetrically welded inside the cross beam 2, and the controller uses a PLC system to control the walking mechanism 6 to walk at a uniform speed on the ground.

[0091] As shown, Figures 1-2 Four sets of jacking mechanisms 7 are symmetrically welded inside the cross beam 2, the bearing capacity of a single jack is 35t, and the stroke is selected according to the height difference of the terrain. Through on-site measurement, the stroke of 500mm is selected in the present example to adjust the height of different height difference terrains.

[0092] As shown, Figures 1-2 The longitudinal connection of the anchoring system 3 selects M32 screw rods and 45# I-beams, which pull the one-span mobile support structure through the web reserved holes of the cross beam 2, and connect the longitudinally adjacent two-span mobile supports into a whole through the 45# I-beams; the transverse connection selects two 40# channel steels to connect the transversely adjacent support structures into a whole through bolt holes.

[0093] As shown, Figures 1-2 The unloading block 5 is composed of a sand box and an elevation adjusting block. After the mobile support walks to the predetermined position, the support is lifted to the bridge design elevation through the jacking mechanism 7, and then the support is supported through the sand box and the elevation adjusting block, the transformation of the support system is completed, and the jacking mechanism 7 is retracted.

[0094] As shown, Figures 1-3As shown, the distribution beam 4 is placed above the bearing truss 1, the distribution beam 4 has transverse bridge direction's bailey beam, the bailey beam length can be adjusted according to the different width of the bridge, adapt to the variable width bridge construction, the bailey beam of the transverse two moving supports is staggered, in order to ensure that the support structure can be stressed as a whole, the intersection uses the pressing plate to fix the bailey beam on the bolt hole, and the bailey beam is connected into a whole. The length of the longitudinal beam 9 can fine tune the length of the bridge, and adapt to the installation of the bridge formwork.

[0095] The construction method of the multi-span cast-in-place movable support structure comprises the following steps:

[0096] S1: According to the width of the bridge, three groups of movable support combination are selected for single-span transverse bridge direction to construct the cast-in-place box girder, and nine groups of movable support structures are needed for three-span.

[0097] S2: According to the design width of the nine groups of movable supports, materials are prepared and assembled on the construction site.

[0098] S3: Since the project is a reconstruction and expansion project, the construction is carried out on the road that has been opened to traffic, the foundation condition is good, and the nine groups of movable supports selected by the walking mechanism 6 can directly walk on the existing road. If there are obstacles in the walking process, the obstacles can be removed through the obstacle removal mechanism, and the three groups of supports are moved to the designated position in sequence through the walking mechanism 6.

[0099] S4: After walking in place, the lifting mechanism 7 is lowered, the support is lifted to the design elevation, the unloading block 5 is installed, the lifting mechanism 7 is retracted, the upper load is transmitted to the foundation by the unloading block 5, and finally the movable support is connected into a whole through the anchoring system 3 to bear force together. The distribution beam is fixed on the bolt hole of the bailey beam through the pressing plate at the position where the bailey beam of the two support structure systems is staggered.

[0100] S5: After the cast-in-place beam construction is completed and meets the design requirements, the lifting mechanism 7 is lowered to lift the support, and after the unloading block 5 is removed, the support is lowered to the existing road, and the formwork and concrete are automatically demoulded.

[0101] S6: After the movable support system is lowered, the walking mechanism 6 is operated to move to the design position to construct the next cast-in-place beam. The specific construction steps include:

[0102] S61: After the first cast-in-place beam is demoulded, the pressing plate above the bailey beam 10 is contacted, so that the three groups of movable support units can move freely, the movable support unit 11 located on the inner side is walked along the road advancing direction, and stopped at the third link position;

[0103] S62: The middle mobile support unit 13 needs to move laterally to the inside of the bridge, the connecting cross brace 32 between the mobile supports outside the pier 15 affects the movement of the middle mobile support unit 13, so it needs to be removed, the middle mobile support unit 13 moves inwardly to the inside of the bridge by a certain distance, then the mobile support is supported by a certain height through the jacking mechanism 7, then the direction of the electric walking wheel 19 is changed (90°) and installed, then the mobile support is lowered through the jacking mechanism 7, and moved forward to the inside of the second joint along the direction of the road;

[0104] S63: The middle mobile support unit 13 is supported by a certain height through the jacking mechanism 7, then the direction of the electric walking wheel 19 is changed (90°) and installed, then the mobile support is lowered through the jacking mechanism 7, and the middle mobile support unit is moved from the inside to the middle of the second joint beam section pouring position, and the connecting cross brace 32 of the middle mobile support unit is installed;

[0105] S64: The inner mobile support unit 11 is retracted to the inside of the second joint beam section pouring position;

[0106] S65: Similarly, the outer mobile support unit 14 is moved to the outside of the second joint beam section pouring position;

[0107] S66: After all the mobile support units reach the designated position of the second joint pouring beam section, all of them are supported by the jacking mechanism 7 only for conversion, and the mobile support is adjusted to the design pouring elevation of the beam section, then the height changing block, the unloading block 5 and the anchoring system 3 are added, so that the three groups of mobile support units are connected into one whole, and finally the jacking mechanism 7 is retracted into the support conversion.

[0108] Although the embodiments of the present application have been disclosed as above, they are not limited to the application listed in the specification and the embodiments, and can be fully applied to various fields suitable for the present application, and additional modifications can be easily realized by those skilled in the art, therefore the present application is not limited to specific details and the embodiments shown and described herein, and the general concept defined by the claims and the equivalent scope.

Claims

1. A multi-span cast-in-place beam mobile support structure system, characterized by, The mobile support includes a load-bearing truss, a stand, a longitudinal beam, a cross beam, a walking mechanism and a jacking mechanism; the load-bearing truss is fixed on both sides along the longitudinal direction of the bridge through the stand, the stand and the upper end of the load-bearing truss are fixed with the longitudinal beam, and the lower end of the stand on both sides of the load-bearing truss is fixed through the cross beam respectively; a plurality of walking mechanisms and a plurality of jacking mechanisms are fixed below the cross beam, and the walking mechanism is arranged to drive the mobile support to walk; The anchoring system includes a tensioning screw rod and a connecting cross brace, the web of the cross beam is provided with an opening, and the two cross beams of a single mobile support are connected and fixed through the tensioning screw rod, and the connecting cross brace connects two adjacent mobile supports in the longitudinal and transverse directions into a whole; The distribution beam is placed on the longitudinal beam, and the distribution beam is composed of transverse bridge direction's bailey beam and longitudinal bridge direction's profile steel connection, and the adjacent bailey beams in the transverse bridge direction are cross arranged; The unloading block is removably supported below the cross beam; Each cast-in-place beam has multiple groups, and each group divides the mobile supports into three mobile support units along the transverse bridge direction, and the mobile supports in the mobile support unit are connected into a whole through the anchoring system; Each mobile support unit is provided with an obstacle removing mechanism, which includes a plurality of obstacle removing units arranged on a seat body around the outer periphery of the mobile support unit, and corresponds to the electric walking wheels around the outer periphery one by one; The obstacle removing unit includes: A distance sensor is arranged on the seat body, the seat body extends along the walking direction of the electric walking wheel, the distance sensor is fixed symmetrically on both sides of the walking direction of the electric walking wheel, and the distance sensor is arranged to detect the distance from the ground vertically; A first pushing mechanism includes an electric track, an electric push rod, a connecting disc and a push plate; the electric track is fixed on the seat body perpendicular to the walking direction of the electric walking wheel, and the connecting line of the electric track and the distance sensor is parallel to the shaft of the electric walking wheel; the electric push rod is movably arranged on the electric track through a sliding block, the telescopic end of the electric push rod is fixed with the connecting disc, the connecting disc is connected with the push plate, and the push plate is arranged vertically to the ground; A second pushing mechanism has the same structure as the first pushing mechanism, the second pushing mechanism is arranged on the seat body and located between the first pushing mechanism and the electric walking wheel, the electric track of the second pushing mechanism is parallel to the electric track of the first pushing mechanism, the starting end of the electric track of the second pushing mechanism and the terminal end of the electric track of the first pushing mechanism are staggered, and the terminal end of the electric track of the second pushing mechanism extends away from the terminal end of the electric track of the first pushing mechanism; that is, the first pushing mechanism and the second pushing mechanism are both two groups; A controller receives information from the distance sensor and controls the electric walking wheel, the first pushing mechanism and the second pushing mechanism; The unloading block is composed of a sand box and an elevation adjusting block; The unloading block is composed of a sand box and an elevation adjusting block; The jacking mechanism is a jack, and the jack is welded to the inner side of the cross beam through a reinforcing plate; the walking mechanism comprises an electric walking wheel and a seat body; the seat body is connected with the electric walking wheel, and the seat body and the cross beam are fixed through bolts.

2. The multi-span cast-in-place beam mobile support structure system in accordance with claim 1, wherein, The bearing truss is welded into a truss structure through steel pipes, and the column and the steel pipes of the bearing truss are fixed through butt flanges and bolts.

3. The multi-span cast-in-place beam mobile support structure system in accordance with claim 1, wherein, A set of jacking mechanisms are arranged at the corresponding cross beams directly below each column.

4. A construction method using a multi-span cast-in-place beam mobile support structure system, characterized by, The method comprises the following steps: S1: determining the width and quantity of the mobile support according to the width of the cast-in-place beam; S2: preparing materials according to the determined width and quantity of the mobile support, and welding and assembling the mobile support at the construction site; S3: first walking along the longitudinal bridge direction through the walking mechanism, and then walking along the transverse bridge direction through the walking mechanism to the designated position; S4: after walking to the designated position, lowering the jacking mechanism, jacking up the support to the designed elevation, installing the sand box and the elevation adjusting block, retracting the jacking mechanism after the conversion of the support system, and finally connecting the cross beams of the mobile support along the longitudinal and transverse directions into a whole through the anchoring system, and fixing the distribution beam on the bolt holes of the Bailey beam through the pressing plate at the positions where the two support structure systems are staggered; S5: after the cast-in-place beam construction is completed and meets the design requirements, lowering the jacking mechanism, retracting the jacking mechanism after removing the unloading block, and lowering the height of the mobile support, so that the concrete is automatically demoulded; S6: after the mobile support system falls back, moving the walking mechanism to the designed position to perform the construction of the next cast-in-place beam.

5. The construction method using the mobile support structure system for a multi-span cast-in-place beam according to claim 4, wherein Each cast-in-place beam has multiple drops, and each cast-in-place beam is divided into three groups of mobile support units along the transverse bridge direction, and the mobile supports in the mobile support units are connected into a whole through the anchoring system; The specific construction steps of the next cast-in-place beam after the construction of one cast-in-place beam is completed in step S6 comprise: S61: after the demoulding of the first cast-in-place beam is completed, contacting the pressing plate above the Bailey beam to enable the three groups of mobile support units to move freely, walking the mobile support unit on the inner side along the road advancing direction, and stopping at the third cast-in-place beam position; S62: the mobile support unit in the middle needs to move to the inner side of the bridge, the connecting cross brace between the mobile support units on the outer side of the bridge pier and the mobile support unit in the middle is removed, the mobile support unit in the middle is moved to the inner side by a set distance, then the mobile support is supported to a certain height through the jacking mechanism, then the electric walking wheel is installed by changing the direction, and then the mobile support is lowered through the jacking mechanism and moved forward to the inner side of the second cast-in-place beam position along the road advancing direction; S63: supporting the mobile support unit in the middle to a certain height through the jacking mechanism, then installing the electric walking wheel by changing the direction, then lowering the mobile support through the jacking mechanism, and moving the mobile support in the middle from the inner side to the pouring position in the middle of the second cast-in-place beam section and installing the connecting cross brace removed from the mobile support in the middle; S64: retracting the mobile support unit on the inner side to the pouring position on the inner side of the second cast-in-place beam section; S65: similarly, moving the mobile support unit on the outer side to the pouring position on the outer side of the second cast-in-place beam section; S66: After all the mobile support units reach the designated position of the second joint pouring beam segment, all the support conversion is completed by the jacking mechanism, while the mobile support is adjusted to the design pouring elevation of the beam segment, then the height change block, unloading block and anchoring system are installed, so that the three groups of mobile support units are connected into a whole, and finally the jacking mechanism is retracted to complete the support conversion.

6. The construction method using the mobile support structure system for a multi-span cast-in-place beam according to claim 5, wherein The controller is configured to: During the walking process of the mobile support unit, the distance sensor transmits a monitoring distance signal to the controller, and when the monitoring distance is less than the set distance, the controller controls the walking mechanism of the mobile support unit to stop; control the electric push rod of the first pushing mechanism to push the push plate downward to a set distance, then control the electric push rod of the first pushing mechanism to move on the electric track by a set distance, push the obstacle by a distance, then control the controller to control each part of the first pushing mechanism to return to the initial position; control the mobile support unit to walk a set distance, which is the distance between the first pushing mechanism and the second pushing mechanism; According to the pushing distance set by the first pushing mechanism and the set distance of the electric track of the second pushing mechanism, the obstacle approaches the push plate of the second pushing mechanism, the electric push rod of the second pushing mechanism is controlled to push the push plate downward to a set distance, then the electric push rod of the second pushing mechanism is controlled to move on the electric track by a set distance, the obstacle is pushed by a distance again, then the controller controls each part of the second pushing mechanism to return to the initial position.

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