Upward moving formwork suitable for simply supported concrete box girder and capable of achieving two-way construction

Abstract

The invention relates to the technical field of bridge construction equipment, in particular to an ascending type movable formwork suitable for simply supported concrete box girders and capable of achieving two-way construction, which comprises a main frame, a front main supporting leg, a rear main supporting leg and a rear auxiliary supporting leg, the outer rib transverse locking mechanism and the outer rib are hung on a cantilever beam of the main frame, the outer mold system is arranged on the outer rib, the inner mold system is arranged in a cavity of the outer mold system, the end mold systems are arranged at the ends of the inner mold system and the outer mold system, and the hanging walkway and the electric hoist are arranged below a connecting beam of the main frame. The counterweight system is arranged at the tail end of the main frame, the anchoring device is arranged at the rear part of the main frame, and the suspender is arranged between the main beam and the outer rib. Reverse construction can be achieved without dismantling the main frame and reassembling, the construction efficiency is high, the construction cost is low, and the bridge protection effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction equipment, and in particular to an upward movable formwork suitable for bidirectional construction of a simply supported concrete box girder. Background Art

[0002] As far as my country is concerned, with the development of economy, bridges account for a large proportion of the total lines and show an increasing trend, which shows the importance of bridge construction; combined with the actual situation of bridge construction in my country, with the completion of large-scale and long trunk line construction plans, small-scale bridge construction in western mountainous areas and eastern coastal areas will gradually occupy an important position in the future, especially in the western mountainous areas with complex terrain, and small and medium-sized bridges and bridge-tunnel connections are particularly common; because the bridges are scattered and the scale of a single bridge is limited, the whole-hole prefabrication method has lost its economic advantage. Under such a background, the mobile formwork method is more economical and adaptable than the whole-hole prefabrication method. Therefore, the mobile formwork is an indispensable and important equipment in future bridge construction.

[0003] Chinese Patent Publication No.: CN113981835A discloses a mobile formwork and a through-hole method thereof, wherein the mobile formwork comprises: a formwork body; a front support assembly, wherein the front support assembly comprises a lower frame and an upper frame, wherein the lower frame comprises a first connecting member, wherein the upper frame is suspended on the formwork body, and wherein a second connecting member is fixed on the upper frame; a middle support assembly, wherein the middle support assembly comprises a first liftable supporting member, a third connecting member and a fourth connecting member, wherein the third connecting member is fixed on the first liftable supporting member, and the fourth connecting member is fixed on the formwork body; and a rear support mechanism, wherein the rear support mechanism comprises a rear support assembly and a displacement assembly, wherein the rear support assembly comprises a second liftable supporting member, a fifth connecting member and a sixth connecting member, wherein the fifth connecting member is fixed on the second liftable supporting member, and the sixth connecting member is fixed on the formwork body; and the displacement assembly comprises a displacement member, a seventh connecting member and an eighth connecting member, wherein the seventh connecting member is fixed on the displacement member, and the eighth connecting member is fixed on the formwork body; thus, the mobile formwork and the through-hole method thereof have the following problems: the mobile formwork needs to be dismantled and reinstalled on a large scale during reverse construction.

[0004] In the engineering practice of mobile formwork cast-in-place construction method, safety issues are increasingly valued. In order to increase and ensure the safety of mobile formwork during construction, anchoring is a common safety measure in engineering practice. The considerations for anchoring safety measures for mobile formwork are mainly: 1. Improving anti-overturning safety; 2. Improving sliding safety. In order to achieve anchoring of mobile formwork in engineering practice, the method of setting embedded parts at specific locations when casting concrete beams or bridge piers is often adopted. The embedded parts set when casting concrete beams or bridge piers are temporary components. When the mobile formwork is constructed span by span, all covered bridges or bridge piers must be embedded. Therefore, the overall cost investment is very large, and temporary components often need to be removed after the main construction is completed, which will generate new labor costs. Therefore, comprehensive considerations are a huge investment. Summary of the invention

[0005] To this end, the present invention provides an upward movable formwork suitable for bidirectional construction of simply supported concrete box girders, so as to overcome the problems in the prior art that the movable formwork needs to be dismantled and reinstalled on a large scale during reverse construction, and the cost investment of embedded parts during the construction of the movable formwork is high.

[0006] To achieve the above object, the present invention provides an upward movable formwork suitable for bidirectional construction of a simply supported concrete box girder, comprising:

[0007] The main frame is composed of two parallel longitudinal beams, the two ends of the longitudinal beams are guide beams of the truss structure, the middle area is the main beam of the box beam structure, and the middle part of the main frame is provided with a connecting beam and a cantilever beam;

[0008] Legs are arranged below the main frame, including front main legs, rear main legs and rear auxiliary legs, and are used to support the overall movable formwork. The front main legs and rear main legs are movable legs, and the rear auxiliary legs are fixed legs. The front main legs are supported on the piers, and the rear main legs and rear auxiliary legs are supported on the erected beam surface.

[0009] The outer rib is suspended on the cantilever beam to support the outer mold system, and includes an outer rib transverse movement mechanism and a transverse locking structure. One end of the outer rib transverse movement mechanism is connected to the top of the outer rib, and the other end is connected to the main beam or the cantilever beam, and is used for the outer rib to be opened and closed along the cantilever beam;

[0010] An outer formwork system is arranged on the outer ribs, the outer formwork system is laterally symmetrical and is used to support and fix the outer side of the concrete structure;

[0011] An inner formwork system, which is arranged in the cavity of the outer formwork system and is used to support and fix the inner side of the concrete structure;

[0012] An end mold, which is arranged at the ends of the inner mold system and the outer mold system and is used to support and fix the ends of the concrete structure;

[0013] A hanging walkway and an electric hoist are arranged below the connecting beam and can move longitudinally along the track to assist the crane in lifting the beam surface steel bars and tools;

[0014] The electrical system is used to accurately control the movement of the mobile formwork, monitor the actual distance between the outer rib and the concrete beam when the mobile formwork passes through the hole, and detect the lateral deviation of the mobile formwork; determine the degree of shaking of the mobile formwork according to the changing trend of the actual distance, and automatically adjust the operation according to the preset program; and provide power to the mobile formwork to drive the movement and operation of its various components.

[0015] Furthermore, the movable mold frame adopts an upward structure, and the main frame is a symmetrical structure in the horizontal and vertical directions.

[0016] Furthermore, a hanger is provided between the main frame and the outer ribs. The hanger is installed in the casting state and removed in the demoulding and through-hole states. The hanger passes through the flange plate of the concrete beam from the outer side of the concrete beam web.

[0017] Furthermore, the upper structures of the front main supporting leg and the rear main supporting leg are the same, and the front main supporting leg and the rear main supporting leg have a transverse movement mechanism and a longitudinal movement mechanism.

[0018] Furthermore, a cushion stone device is provided at the lower end of the front main support leg column, and the cushion stone device can realize the horizontal anchoring function of the front main support leg without embedded parts; the front main support leg is provided with an adjustable diagonal brace rod, one end of the adjustable diagonal brace rod is provided on the front support leg cross beam, and the other end is provided on the cast beam end or pier top, so as to prevent the front main support leg from overturning.

[0019] Furthermore, the mobile mold frame also includes a front mold opening hydraulic system and a rear mold opening and rear auxiliary leg hydraulic system. The front mold opening hydraulic system is composed of a four-valve pump station, a mold opening cylinder and pipelines, etc., which are used to realize the lateral movement of the longitudinal ribs;

[0020] The rear end mold opening and rear auxiliary outrigger hydraulic system is composed of a four-valve pump station, a third outrigger lifting cylinder, a mold opening cylinder and pipelines, etc., and is used to realize the rear auxiliary outrigger lifting and the rear end mold opening longitudinal rib lateral movement.

[0021] Furthermore, the pump station of the front mold opening hydraulic system has the same structure as the pump station of the rear mold opening and rear auxiliary support leg hydraulic system, and reversing the hoses of the pump station can realize the reverse construction of the bridge by the mobile formwork.

[0022] Furthermore, the mobile formwork also includes an anchoring system arranged at the rear of the main frame, which is used to fix the formwork on the completed bridge structure to prevent the formwork from being displaced or tilted due to its own weight, pressure during concrete pouring or other external forces during construction. By utilizing the beam seams of simply supported concrete beams, the anchoring device can achieve the vertical anchoring function of the main frame without embedded parts.

[0023] Furthermore, a modular assembled counterweight system is provided at the rear end of the main frame, and the modular assembled counterweight system can be quickly disassembled into unit modules with smaller weight.

[0024] Furthermore, the mobile mold frame also includes an electrical system for accurately controlling various movements of the mobile mold frame, monitoring parameters such as the position, speed, and load of the mobile mold frame, automatically adjusting operations according to a preset program, and providing power to the mobile mold frame to drive the movement and operation of its various components.

[0025] Furthermore, laser sensors are arranged on both sides of the outer rib. When the movable formwork passes through the hole, the laser sensors on both sides of the outer rib detect the first actual distance and the second actual distance between the outer rib and the concrete beam in real time, and transmit the data to the electrical system.

[0026] The electrical system draws a distance change curve according to the first actual distance and calculates a derivative function of the curve. If the derivative function corresponding to any moment in the unit time is greater than zero, less than zero or equal to zero, it is judged that the first actual distance continues to increase, continues to decrease or remains unchanged.

[0027] If there are three items that meet the judgment condition in a unit time, it is judged that the movable mold frame shakes during the hole-passing process, and the longitudinal movement cylinders of the front main legs and the rear main legs are used to reduce the longitudinal movement speed of the movable mold frame;

[0028] When the movable mold frame shakes during the hole-passing process, the actual wind speed is checked in real time according to the wind speed sensor arranged on the movable mold frame, and the electrical system compares the actual wind speed with the preset standard wind speed.

[0029] If the actual wind speed is greater than the standard wind speed, the electrical system controls the movable mold frame to stop longitudinal movement;

[0030] If the actual wind speed is less than or equal to the standard wind speed, the electrical system reduces the longitudinal speed of the mobile mold frame, and the reduced longitudinal speed is negatively correlated with the ratio of the actual wind speed to the standard wind speed.

[0031] If the number of items that meet the judgment conditions per unit time is equal to two, or the number of items that meet the judgment conditions per unit time is equal to one and the corresponding derivative function is not equal to zero, it is determined that the actual distance between the outer rib and the concrete beam of the movable formwork changes during the through-hole process.

[0032] Furthermore, when the actual distance between the outer rib and the concrete beam of the movable formwork changes during the hole-passing process,

[0033] The electrical system calculates an absolute value of a distance difference between a first actual distance and a second actual distance,

[0034] If the distance difference is less than or equal to the difference evaluation value, it is determined that the movable mold frame has no lateral offset during the through-hole process; if the distance difference is greater than the difference evaluation value, it is determined that the movable mold frame has lateral offset during the through-hole process;

[0035] If the first actual distance is greater than the second actual distance, it is determined that the outer rib side corresponding to the second actual distance is closer to the concrete beam, and the formwork is moved toward the outer rib side corresponding to the second actual distance by using the transverse oil cylinders of the front main legs and the rear main legs to adjust the transverse position of the movable formwork;

[0036] If the first actual distance is smaller than the second actual distance, it is determined that the outer rib side corresponding to the first actual distance is closer to the concrete beam, and the formwork is moved toward the outer rib side corresponding to the first actual distance by using the transverse oil cylinders of the front main legs and the rear main legs to adjust the transverse position of the movable formwork;

[0037] When adjusting the lateral position of the mobile mold frame, the electrical system calculates the rate of change of the difference between the first actual distance and the standard distance, calculates the critical time according to the standard distance and the rate of change of the difference, and calculates the safe longitudinal movement length of the mobile mold frame at the current longitudinal movement speed;

[0038] The electrical system adjusts the lateral movement speed of the movable mold frame by using the lateral movement cylinders of the front main legs and the rear main legs according to the safe longitudinal movement length of the movable mold frame, and the lateral movement speed is negatively correlated with the safe longitudinal movement length;

[0039] Among them, the difference evaluation value is a preset value set according to the dangerous collision distance between the mobile formwork and the concrete beam.

[0040] Compared with the prior art, the beneficial effect of the present invention is that it can effectively avoid and solve the deficiency of the existing upward mobile formwork that needs to be dismantled and reinstalled on a large scale during reverse construction, thereby expanding its adaptability to reverse construction; at the same time, it can solve the deficiency of using a large number of embedded parts for anchoring safety measures during the cast-in-place construction of the mobile formwork, thereby effectively reducing construction costs.

[0041] Furthermore, the mobile formwork adopts an upward structure, and the main frame is a symmetrical structure in the horizontal and vertical directions, which greatly facilitates the mobile formwork to adapt to two-way construction.

[0042] Furthermore, a modular assembled counterweight system is provided at the rear end of the main frame of the mobile formwork, which can not only effectively increase the anti-overturning safety of the mobile formwork when passing through holes, but also can be quickly disassembled into unit modules with smaller weight. During reverse construction, the counterweight can be replaced, removed and installed without the cooperation of a crane.

[0043] Furthermore, anchoring devices are provided at the rear parts of the two longitudinal beams of the main frame. By utilizing the beam seams of the simply supported concrete beams, the anchoring devices can realize the vertical anchoring function of the main frame without embedded parts. A cushion stone device is provided at the lower end of the front main support leg column. The cushion stone device can realize the horizontal anchoring function of the front main support leg without embedded parts. The above-mentioned anchoring does not require embedded parts to achieve the anchoring function requirements of the mobile formwork, which greatly reduces the construction investment and has good economy.

[0044] Furthermore, affected by weather, wind and movement errors, the mobile formwork may produce lateral displacement or shaking during the through-hole process. By detecting the lateral position of the mobile formwork in real time, it can be ensured that the formwork always maintains the correct position during the through-hole process to avoid collision between the formwork and the hole or concrete beam, thereby ensuring the accuracy and quality of the construction, and promptly discovering and correcting deviations to avoid rework due to inaccurate positioning, thereby improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of an upward movable formwork applicable to bidirectional construction of a simply supported concrete box girder in an embodiment of the present invention;

[0046] Figure 2 It is a cross-sectional schematic diagram of the movable mold frame at the AA section in an embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the structure of the main frame in an embodiment of the present invention;

[0048] Figure 4 This is a schematic diagram of the front main support leg structure in an embodiment of the present invention;

[0049] Figure 5 It is a schematic diagram of the side structure of the front main supporting leg in an embodiment of the present invention;

[0050] Figure 6 It is a schematic diagram of the top view of the front main supporting leg in an embodiment of the present invention;

[0051] Figure 7 This is a schematic diagram of the front structural view of the rear main support leg in an embodiment of the present invention;

[0052] Figure 8 It is a schematic diagram of the side structure of the rear main support leg in an embodiment of the present invention;

[0053] Fig. 9 It is a schematic diagram of the top view of the rear main support leg in an embodiment of the present invention;

[0054] Fig.10 It is a schematic diagram of the front view structure of the rear auxiliary supporting leg in an embodiment of the present invention;

[0055] Fig.11It is a schematic diagram of the side structure of the rear auxiliary supporting leg in an embodiment of the present invention;

[0056] Fig.12 It is a schematic diagram of the top view of the structure of the rear auxiliary supporting leg in an embodiment of the present invention;

[0057] Fig.13 This is a schematic diagram of the main structure of the hanging walkway and the electric hoist in the embodiment of the present invention;

[0058] Fig.14 It is a schematic diagram of the top view of the hanging walkway and the electric hoist in the embodiment of the present invention;

[0059] Fig.15 It is a cross-sectional schematic diagram of the hanging walkway and the electric hoist at the AA section in the embodiment of the present invention;

[0060] Fig.16 It is a cross-sectional schematic diagram of the hanging walkway and the electric hoist at the BB section in the embodiment of the present invention;

[0061] Fig.17 This is a schematic diagram of the main structure of the hanging outer rib in an embodiment of the present invention;

[0062] Fig.18 It is a schematic diagram of the side structure of the hanging outer rib in an embodiment of the present invention;

[0063] Fig.19 It is a cross-sectional schematic diagram of the hanging outer rib at the AA section in an embodiment of the present invention;

[0064] Fig. 20 It is a schematic diagram of the top view of the outer mold system in an embodiment of the present invention;

[0065] Fig.21 It is a cross-sectional schematic diagram of the outer mold system at section AA in an embodiment of the present invention;

[0066] Fig. 22 It is a cross-sectional schematic diagram of the outer mold system at the BB section in an embodiment of the present invention;

[0067] Fig.23 This is a schematic diagram of the main structure of the end mold system in an embodiment of the present invention;

[0068] Fig.24 It is a schematic diagram of the side structure of the end mold system in an embodiment of the present invention;

[0069] Fig.25 This is a schematic structural diagram of a transverse locking structure in an embodiment of the present invention;

[0070] Fig.26 This is a schematic diagram of the main structure of the anchoring device in an embodiment of the present invention;

[0071] Fig. 27It is a schematic diagram of the side structure of the anchoring device in an embodiment of the present invention;

[0072] Fig.28 It is a front view schematic diagram of a counterweight system in an embodiment of the present invention;

[0073] Fig.29 A side view schematic diagram of a counterweight system in an embodiment of the present invention;

[0074] In the figure, main frame 1, front main outrigger 2, rear main outrigger 3, rear auxiliary outrigger 4, hanging walkway and electric hoist 5, outer rib 6, outer mold system 7, inner mold system 8, end mold system 9, transverse locking structure 10, suspension rod 11, anchor system 12, counterweight system 13, main beam 111, guide beam 112, main beam connecting beam 113, guide beam connecting beam 114, cantilever beam 115, upper cross beam 21, cushion block 22, column 23, fixed diagonal brace 24, fixed flat brace 25, adjustable diagonal brace 26, shifting trolley 27, cushion stone holding device 28, longitudinal shifting trolley 29, longitudinal shifting trolley 30, longitudinal shifting trolley 31, longitudinal shifting trolley 32, longitudinal shifting trolley 33, longitudinal shifting trolley 34, longitudinal shifting trolley 35, longitudinal shifting trolley 36, longitudinal shifting trolley 37, longitudinal shifting trolley 38, longitudinal shifting trolley 39, longitudinal shifting trolley 40, longitudinal shifting trolley 41, longitudinal shifting trolley 42, longitudinal shifting trolley 43, longitudinal shifting trolley 44, longitudinal shifting trolley 45, longitudinal shifting trolley 46, longitudinal shifting trolley 47, longitudinal shifting trolley 48, longitudinal shifting trolley 49, longitudinal shifting trolley 50, longitudinal shifting trolley 51, longitudinal shifting trolley 52, longitudinal shifting trolley 53, longitudinal shifting trolley 54, longitudinal shifting trolley 55, longitudinal shifting trolley 56, longitudinal shifting Mechanism 271, transverse mechanism 272, sliding hinge assembly 273, vertical support cylinder 274, hook device 275, tensioning device 276, upper crossbeam 31, cushion block 32, shift trolley 33, sliding hinge assembly 331, transverse mechanism 332, longitudinal mechanism 333, vertical support cylinder 334, hook device 335, tensioning device 336, running track 41, lower trolley 42, running wheel box 421, lower crossbeam 422, primary pin 423, column 43, secondary pin 44, lifting mechanism 45, flat crossbeam 451, lifting cylinder 452, fourth-level pin 453, third-level pin 46, upper crossbeam 47, diagonal support assembly 48, diagonal support rod 481, cross hinge seat 482, fixed hinge seat 483, fifth-level pin 484, I-beam track 51, triangular support 53, wire support frame 54, wire rope pull line 55, movable electric hoist 56, upper rib 61, lower rib 62, limit device 63, bottom mold assembly 71, side mold assembly 72, wing mold assembly 73, side mold assembly 74, walkway railing assembly 75, bottom mold support rod 76, support rod pin 77, The first strut of the side form 78, the second strut of the side form 79, the wing form strut 710, the first strut of the pier top 711, the second strut of the pier top 712, the third strut of the pier top 713, the pier top strut hinge seat 714, the top plate end form 91, the wing plate end form 92, the web end form 93, the bottom plate end form 94, the anchor box formwork 95, the ear seat 101, the ear seat pin 102, the cylinder 103, the cylinder pin 104, the upper crossbeam 121, the lower crossbeam 122, the anchor rod 123, the pad 124, the anchor nut 125, the counterweight platform 131, and the counterweight block 132. DETAILED DESCRIPTION

[0075] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0076] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0077] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0078] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] See also Figure 1-Figure 2 As shown, Figure 1 Schematic diagram of the structure of an upward movable formwork applicable to bidirectional construction of a simply supported concrete box girder in an embodiment of the present invention. Figure 2 It is a cross-sectional schematic diagram of the movable mold frame at the AA section in an embodiment of the present invention;

[0080] The present invention provides an upward movable formwork suitable for bidirectional construction of a simply supported concrete box girder, comprising:

[0081] The main frame 1 is composed of two longitudinal beams arranged in parallel, the two ends of the longitudinal beams are guide beams 112 of a truss structure, the middle area is a main beam 111 of a box beam structure, and the middle part of the main frame is provided with a connecting beam and a cantilever beam 131;

[0082] Legs, which are arranged below the main frame, include front main legs 2, rear main legs 3 and rear auxiliary legs 4, and are used to support the overall mobile formwork. The front main legs 2 and rear main legs 3 are movable legs, and the rear auxiliary legs 4 are fixed legs. The front main legs 2 are supported on the piers, and the rear main legs 3 and rear auxiliary legs 4 are supported on the erected beam surface.

[0083] The outer rib 6 is suspended on the cantilever beam to support the outer mold system 7, including an outer rib transverse movement mechanism and a transverse locking structure 10, wherein one end of the outer rib transverse movement mechanism is connected to the top of the outer rib and the other end is connected to the main beam or the cantilever beam, and is used for the outer rib to be opened and closed along the cantilever beam;

[0084] An outer formwork system 7, which is arranged on the outer ribs, and the outer formwork system is laterally symmetrical and used to support and fix the outer side of the concrete structure;

[0085] An inner formwork system 8, which is arranged in the cavity of the outer formwork system 7 and is used to support and fix the inner side of the concrete structure;

[0086] An end form system 9, which is arranged at the ends of the inner form system and the outer form system, and is used to support and fix the ends of the concrete structure;

[0087] A hanging walkway and electric hoist 5, which is arranged below the connecting beam and can move longitudinally along the track, is used to assist the crane in lifting the beam surface steel bars and tools;

[0088] The electrical system is used to accurately control the movement of the mobile formwork, monitor the actual distance between the outer rib and the concrete beam when the mobile formwork passes through the hole, and detect the lateral deviation of the mobile formwork; determine the degree of shaking of the mobile formwork according to the changing trend of the actual distance, and automatically adjust the operation according to the preset program; and provide power to the mobile formwork to drive the movement and operation of its various components.

[0089] The movable formwork adopts an upward structure, and the main frame 1 is symmetrical in the transverse and longitudinal directions. A hanger 11 is arranged between the main frame 1 and the outer rib 6. The hanger 11 is installed in the casting state and removed in the demoulding and through-hole states. The hanger 11 passes through the concrete beam flange plate from the outside of the concrete beam web; the hanger device 11 is composed of a precision-drawn threaded hanger, a pad, a conical washer, a spherical washer and a precision-drawn nut.

[0090] like Figure 3 As shown, Figure 3 This is a schematic diagram of the structure of the main frame in an embodiment of the present invention;

[0091] The main frame 1 described in the present invention is a box-girder combination structure, which is composed of two parallel left and right longitudinal beams, each of which has guide beams 112 of a truss structure at both ends, and a main beam 111 of a box girder structure in the middle area; a main beam connecting beam 113 is arranged between the two main beams 111, and a cantilever beam 115 is arranged outside the main beam 111 and at a position corresponding to the main beam connecting beam 113; a guide beam connecting beam 114 is arranged between the two guide beams 112.

[0092] like Figure 4-Figure 6 As shown, Figure 4 This is a schematic diagram of the front main support leg structure in an embodiment of the present invention. Figure 5 : is a schematic diagram of the side structure of the front main support leg in an embodiment of the present invention, Figure 6 It is a schematic diagram of the top view of the front main supporting leg in an embodiment of the present invention;

[0093] The front main support leg 2 of the present invention includes an upper cross beam 21, a pad 22 located below the upper cross beam 21, a column 23 located below the pad 22, a fixed diagonal brace 24 located between the upper cross beam 21 and the column 23, a fixed flat brace 25 located between the two columns 23, an adjustable diagonal brace 26 located between the side surface of the upper cross beam 21 and the top surface of the pier, a shifting trolley 27 located above the upper cross beam 21 and a cushion stone holding device 28 at the lower end of the front main support leg column; the shifting trolley 27 includes a longitudinal movement mechanism 271, a transverse movement mechanism 272, a sliding hinge assembly 273, a vertical support cylinder 274, a hook device 275, and a tensioning device 276; the hook device 275 is rooted in the side surface of the sliding hinge assembly 273.

[0094] like Figure 7-Figure 9 As shown, Figure 7 This is a schematic diagram of the front view of the rear main support leg in an embodiment of the present invention. Figure 8 is a schematic diagram of the side structure of the rear main support leg in an embodiment of the present invention, Fig. 9 It is a schematic diagram of the top view of the rear main support leg in an embodiment of the present invention;

[0095] The rear main support leg 3 of the present invention includes an upper cross beam 31, a pad 32 located below the upper cross beam 31, and a shift trolley 33 located above the upper cross beam 31; the shift trolley 33 includes a longitudinal movement mechanism 333, a transverse movement mechanism 332, a sliding hinge assembly 331, a vertical support cylinder 334, a hook device 335, and a tensioning device 336; the hook device 335 is rooted in the side of the sliding hinge assembly 333.

[0096] The upper structures of the front main support leg and the rear main support leg are the same, and the front main support leg and the rear main support leg have a transverse movement mechanism and a longitudinal movement mechanism. A cushion stone device is provided at the lower end of the front main support leg column, and the cushion stone device can realize the horizontal anchoring function of the front main support leg without embedded parts; the front main support leg is provided with an adjustable diagonal brace rod, one end of the adjustable diagonal brace rod is provided on the front support leg cross beam, and the other end is provided on the cast beam end or pier top, so as to prevent the front main support leg from overturning.

[0097] like Figure 10-12 As shown, Fig.10 This is a schematic diagram of the front view of the rear auxiliary support leg in an embodiment of the present invention. Fig.11 It is a schematic diagram of the side structure of the rear auxiliary supporting leg in an embodiment of the present invention. Fig.12 It is a schematic diagram of the top view of the structure of the rear auxiliary supporting leg in an embodiment of the present invention;

[0098] The rear auxiliary support leg 4 includes a running track 41, a lower trolley 42 arranged on the running track 41, the lower trolley 42 is composed of a running wheel box 421 and a lower cross beam 422, the running wheel box 421 and the lower cross beam 422 are hinged by a primary pin shaft 423; a column 43 is arranged in the middle of the lower cross beam 422, the column 43 and the lower cross beam 422 are hinged by a secondary pin shaft 44, a jacking mechanism 45 is arranged between the column 43 and the lower cross beam 422, the jacking mechanism 45 includes a flat cross beam 451, a jacking cylinder 452 and a fourth pin shaft 453, and the column 43 and the flat cross beam 451 are hinged by a third pin shaft 44. The first-stage pin 46 is hinged, and the lifting cylinder 452 and the horizontal beam 451 and the lower beam 422 are hinged through the fourth-stage pin 453; the upper beam 47 is arranged above the column 43, and the diagonal support assembly 48 is arranged between the side of the lower beam 422 and the guide beam 112; the diagonal support assembly 48 is composed of a diagonal support rod 481, a cross hinge seat 482, a fixed hinge seat 483, and a five-stage pin 484, the fixed hinge seat 483 and the guide beam 112 are fixedly connected, and the diagonal support rod 481 and the lower beam 422 and the cross hinge seat 482, and the cross hinge seat 482 and the fixed hinge seat 483 are all connected through the five-stage pin 484.

[0099] The mobile mold frame also includes a front mold opening hydraulic system and a rear mold opening and rear auxiliary leg hydraulic system. The front mold opening hydraulic system is composed of a four-valve pump station, a mold opening oil cylinder and pipelines, etc., and is used to realize the transverse movement of the longitudinal ribs; the rear mold opening and rear auxiliary leg hydraulic system is composed of a four-valve pump station, a third leg lifting oil cylinder, a mold opening oil cylinder and pipelines, etc., and is used to realize the lifting of the rear auxiliary leg and the transverse movement of the rear mold opening longitudinal ribs. The pump station of the front mold opening hydraulic system has the same structure as the pump station of the rear mold opening and rear auxiliary leg hydraulic system. Reversing the hoses of the pump station can realize the reverse construction of the bridge by the mobile mold frame.

[0100] like Figure 13-Figure 16 As shown, Fig.13 This is a schematic diagram of the main structure of the hanging walkway and the electric hoist in the embodiment of the present invention. Fig.14 This is a schematic diagram of the top view of the hanging walkway and the electric hoist in the embodiment of the present invention. Fig.15 This is a cross-sectional schematic diagram of the hanging walkway and the electric hoist at the AA section in the embodiment of the present invention. Fig.16 It is a cross-sectional schematic diagram of the hanging walkway and the electric hoist at the BB section in the embodiment of the present invention;

[0101] The hanging walkway and electric hoist 5 described in the present invention include an I-beam rail 51, a U-shaped bolt, a triangular support 53, a wire support frame 54, a wire rope pull line 55, and a movable electric hoist 56; the I-beam rail 51 is suspended below the main beam connecting beam 12 by the U-shaped bolt; the movable electric hoist 56 is suspended on the I-beam rail 51 and can move longitudinally along the I-beam rail 51; the wire support frame 54 is arranged on the inner side of both ends of the I-beam rail 51 to provide a fulcrum for the wire rope pull line 55; the triangular support 53 is arranged on the inner web of the main beam 11 to provide a support point for the I-beam rail 51 to increase the coverage range of the I-beam rail 51.

[0102] like Figure 17-Figure 19 As shown, Fig.17 This is a schematic diagram of the main structure of the hanging outer rib in an embodiment of the present invention. Fig. 20 This is a schematic diagram of the side view structure of the hanging outer rib in an embodiment of the present invention. Fig.19 It is a cross-sectional schematic diagram of the hanging outer rib at the AA section in an embodiment of the present invention;

[0103] The hanging outer rib 6 includes an upper rib 61, a lower rib 62, and a limit device 63; the limit device 63 is arranged on the inner side of the top of the upper rib 61, and the lower rib 62 is provided with a hole for anchoring the hanger 11; in the pouring condition, the left upper rib 61, the left lower rib 62 and the right upper rib 61, the right lower rib 62 are connected to form a whole through flange bolts; in the through-hole condition, the left upper rib 61, the left lower rib 62 and the right upper rib 61, the right lower rib 62 are separated to form two symmetrical parts;

[0104] The hanging outer ribs 6 are hung on the cantilever beams 115 of the main frame 1 . In this embodiment, there are 8 sets of hanging outer ribs 6 in total.

[0105] like Figure 20-22 As shown, Fig. 20 It is a schematic diagram of the top view of the outer mold system in an embodiment of the present invention. Fig.23 is a cross-sectional schematic diagram of the outer mold system at section AA in an embodiment of the present invention, Fig. 22 It is a cross-sectional schematic diagram of the outer mold system at the BB section in an embodiment of the present invention;

[0106] The outer mold system 7 includes a bottom mold assembly 71, a side mold assembly 72, a wing mold assembly 73, a side mold assembly 74, a walkway railing assembly 75, a bottom mold support rod 76, a support rod pin 77, a first side mold support rod 78, a second side mold support rod 79, a wing mold support rod 710, a first pier top support rod 711, a second pier top support rod 712, a third pier top support rod 713, and a pier top support rod hinge seat 714; the outer mold system 7 is laterally symmetrical, and the casting working condition is connected by flange bolts to form a whole; the through-hole working condition is separated to form two symmetrical parts.

[0107] like Figure 23-Figure 24 As shown, Fig.23 This is a schematic diagram of the main structure of the end mold system in an embodiment of the present invention. Fig.24 It is a schematic diagram of the side structure of the end mold system in an embodiment of the present invention;

[0108] The end mold system 9 is composed of a top plate end mold 91, a wing plate end mold 92, a web plate end mold 93, a bottom plate end mold 94, and an anchor box mold 95. The end mold is divided into 17 sections, and the weight of a single piece is less than 0.21t. The sections are connected by bolts, and the end mold and the side mold, and the end mold and the inner mold are connected by bolts. A lifting device is required when installing and disassembling the end mold.

[0109] like Fig.25 As shown, Fig.25 This is a schematic structural diagram of a transverse locking structure in an embodiment of the present invention;

[0110] After the outer rib 6 is closed horizontally, a horizontal locking mechanism 10 is installed on the cantilever beam outside the outer rib, and the length of the screw on the locking mechanism is manually adjusted to make it press against the outer rib 6 to fix the horizontal position of the outer rib 6. There are 16 sets of horizontal locking mechanisms. The horizontal locking structure 10 is composed of an ear seat 101, an ear seat pin shaft 102, a cylinder 103, and a cylinder pin shaft 104.

[0111] like Figure 26-Figure 27 As shown, Fig.26 is a schematic diagram of the front view of the anchoring device in an embodiment of the present invention, Fig. 27 It is a schematic diagram of the side structure of the anchoring device in an embodiment of the present invention;

[0112] The mobile formwork also includes an anchoring system 12 arranged at the rear of the main frame, which is used to fix the formwork on the completed bridge structure to prevent the formwork from being displaced or tilted due to its own weight, pressure during concrete pouring or other external forces during construction. By utilizing the beam seams of simply supported concrete beams, the anchoring device can achieve the vertical anchoring function of the main frame without embedded parts; the anchoring device 12 is composed of an upper crossbeam 121, a lower crossbeam 122, an anchor rod 123, a pad 124, and an anchor nut 125.

[0113] like Figure 28-Figure 29 As shown, Fig.28 is a schematic front view of a counterweight system in an embodiment of the present invention, Fig.29 A side view schematic diagram of a counterweight system in an embodiment of the present invention;

[0114] A modular assembled counterweight system 13 is provided at the rear end of the main frame. The modular assembled counterweight system 13 can be quickly disassembled into unit modules with smaller weight to increase the overall stability of the formwork system, prevent the formwork from tilting or moving due to its own weight and concrete pressure when pouring concrete, maintain the balance of the formwork when moving the formwork, and ensure that the formwork will not tilt or overturn during the movement; the counterweight system 13 includes a counterweight platform 131 and a counterweight block 132.

[0115] Laser sensors are arranged on both sides of the outer rib. When the movable formwork passes through the hole, the laser sensors on both sides of the outer rib detect the first actual distance and the second actual distance between the outer rib and the concrete beam in real time, and transmit the data to the electrical system;

[0116] The electrical system draws a distance variation curve according to the first actual distance and calculates a derivative function of the curve.

[0117] If the derivative function corresponding to any moment in the unit time is greater than zero, less than zero, or equal to zero, then it is judged that the first actual distance continues to increase, continues to decrease, or remains unchanged.

[0118] If there are three items that meet the judgment condition in a unit time, it is judged that the movable mold frame shakes during the hole-passing process, and the longitudinal movement cylinders of the front main legs and the rear main legs are used to reduce the longitudinal movement speed of the movable mold frame;

[0119] When the movable mold frame shakes during the hole-passing process, the movable mold frame detects the actual wind speed in real time according to the set wind speed sensor, and the electrical system compares the actual wind speed with the preset standard wind speed.

[0120] If the actual wind speed is greater than the standard wind speed, it is judged that the current weather environment is bad, and the electrical system controls the movable mold frame to stop longitudinal movement;

[0121] If the actual wind speed is less than or equal to the standard wind speed, it is judged that the weather environment has little effect on the longitudinal movement of the mobile mold frame, and the electrical system reduces the longitudinal movement speed of the mobile mold frame. The reduced longitudinal movement speed is negatively correlated with the ratio of the actual wind speed to the standard wind speed.

[0122] If the number of items that meet the judgment condition per unit time is equal to two, or the number of items that meet the judgment condition per unit time is equal to one and the corresponding derivative function is not equal to zero, it is determined that the actual distance between the outer rib and the concrete beam of the movable formwork changes during the through-hole process.

[0123] When the actual distance between the outer rib and the concrete beam of the movable formwork changes during the hole-passing process,

[0124] The electrical system detects the lateral deviation of the movable formwork according to the actual distance between the outer rib and the concrete beam when the movable formwork passes through the hole;

[0125] The electrical system calculates an absolute value of a distance difference between a first actual distance and a second actual distance,

[0126] If the distance difference is less than or equal to the difference evaluation value, it is determined that the movable mold frame does not generate lateral deviation during the through-hole process;

[0127] If the distance difference is greater than the difference evaluation value, it is determined that the movable mold frame has a lateral offset during the through-hole process;

[0128] Among them, the difference evaluation value is a preset value set according to the dangerous collision distance between the mobile formwork and the concrete beam.

[0129] The electrical system determines the specific situation of the lateral offset according to the magnitude of the first actual distance and the second actual distance,

[0130] If the first actual distance is greater than the second actual distance, it is determined that the outer rib side corresponding to the second actual distance is closer to the concrete beam, and the formwork is moved toward the outer rib side corresponding to the second actual distance by using the transverse oil cylinders of the front main legs and the rear main legs to adjust the transverse position of the movable formwork;

[0131] If the first actual distance is smaller than the second actual distance, it is judged that the distance between the outer rib side corresponding to the first actual distance and the concrete beam is closer, and the formwork is moved toward the outer rib side corresponding to the first actual distance by using the transverse cylinders of the front main support legs and the rear main support legs to adjust the lateral position of the movable formwork.

[0132] When adjusting the lateral position of the mobile mold frame, the electrical system calculates the rate of change of the difference between the first actual distance and the standard distance, calculates the critical time according to the standard distance and the rate of change of the difference, and calculates the safe longitudinal movement length of the mobile mold frame at the current longitudinal movement speed;

[0133] The electrical system adjusts the lateral movement speed of the movable mold frame by using the lateral movement cylinders of the front main legs and the rear main legs according to the safe longitudinal movement length of the movable mold frame, and the lateral movement speed is negatively correlated with the safe longitudinal movement length.

[0134] It can be understood that the standard distance is the distance between the outer rib and the concrete beam when the movable formwork is in the through-hole state and is stationary.

[0135] Specifically, affected by weather, wind and movement errors, the mobile formwork will produce lateral displacement or shaking during the through-hole process. By detecting the lateral position of the mobile formwork in real time, it can be ensured that the formwork always maintains the correct position during the through-hole process to avoid collision between the formwork and the hole or concrete beam, thereby ensuring the accuracy and quality of the construction, and promptly discovering and correcting deviations to avoid rework due to inaccurate positioning, thereby improving construction efficiency.

[0136] In this embodiment, the standard longitudinal movement speed of the mobile mold frame is 2.5m / min, the standard wind speed during the longitudinal movement of the mobile mold frame is 12m / s, which is equivalent to a wind force of level 6. When the actual wind speed is 22m / s, which is equivalent to a wind force of level 9, the mobile mold frame stops longitudinal movement; when the actual wind speed is 9.6m / s, the throttle valve of the longitudinal movement cylinder is used to reduce the longitudinal movement speed of the mobile mold frame, and the reduced longitudinal movement speed is 2.0m / min. By stopping the shaking of the mobile mold frame itself during the longitudinal movement process, the shaking degree of the mobile mold frame is reduced.

[0137] For the construction of 32m simply supported beams, the mobile formwork has a mold opening width of 24m in the through-hole state, the standard distance between the outer rib and the concrete beam is 6m, and the transverse cylinders of the front main legs and the rear main legs can move the mobile formwork laterally by 0.8m. The transverse speed is adjusted according to the throttle valve of the transverse cylinder; when the first transverse distance is 4.5m and the second transverse distance is 7.5m, the absolute value of the distance difference is 3.0m, and the difference evaluation value is 0.5m. The first transverse distance of 4.5m is less than the second transverse distance of 7.5m, and the formwork is moved toward the outer rib side corresponding to the first actual distance; the transverse speed of the mobile formwork is 1.0m / min, the difference change rate is 0.5m / min, the critical time is 12min, and the safe longitudinal length of the mobile formwork is 24m at the current longitudinal speed of 2.0m / min.

[0138] The principle of in-situ casting of the mobile formwork of the present invention is as follows:

[0139] The mobile formwork of the present invention adopts a two-span main frame and three-leg structure. In the in-situ casting state, the front main legs and the rear main legs support the main frame, the front main legs are supported on the bridge piers, the rear main legs are supported on the top surface of the poured beam ends, and the rear auxiliary legs are left empty; a cantilever beam is arranged in the middle of the main frame, and the outer ribs and the outer formwork are hung on the cantilever beam of the main frame to form a bridge manufacturing platform that can be moved longitudinally. A suspension rod is arranged between the outer ribs and the main beam of the main frame, so that the load of the concrete beam is directly transmitted to the main beam through the suspension rod, and then transmitted to the legs and the bridge piers by the main beam. The in-situ casting of the concrete beam and the preliminary work before the casting, such as tying steel bars and installing the inner formwork, are all completed on this platform.

[0140] The principle of the mobile die frame through-hole operation of the present invention is as follows:

[0141] The movable formwork of the present invention has three legs, all located below the main beam, namely the front main leg, the rear main leg and the rear auxiliary leg from front to back; the front main leg and the rear main leg are movable legs, the rear auxiliary leg is a fixed leg, the front main leg is supported on the pier, and the rear main leg and the rear auxiliary leg are supported on the poured beam surface. The outer rib and the outer formwork are hung on the cantilever beam in the middle of the main beam, and the outer rib and the outer formwork can be split into two parts in the middle, so that the outer rib and the outer formwork can be opened and closed horizontally on the cantilever beam;

[0142] The front main legs and rear main legs are equipped with sliding longitudinal movement mechanisms. The main frame can move longitudinally on the front main legs and rear main legs. The front main legs and rear main legs can also be suspended on the main beam and moved longitudinally. The rear auxiliary legs are equipped with wheel boxes. At a specific stage of the equipment passing through the hole, the wheel boxes of the rear auxiliary legs act on the rails of the cast beam surface, which can effectively prevent the main beam from tilting backward.

[0143] After the concrete beam is poured, tensioned and cured, the formwork is moved down to remove the formwork, and the front and rear main legs are converted to through-hole mode (the supporting cylinder is emptied and the slide plate is in contact with the track); the hanger and the outer ribs and the center seam bolts of the outer formwork are removed, and the transverse movement mechanism is started to open the outer ribs and the outer formwork horizontally so that it can pass through the pier; the longitudinal movement mechanism of the front and rear main legs is started, and the switching of each leg is used to move the entire machine longitudinally forward through the hole to the next construction position, and then it is closed horizontally to form a construction platform again to complete the construction of the next hole.

[0144] The above description of the in-situ pouring and through-hole operation is a textual description based on standard operations; in addition to standard operations, there are also variable span operations and reverse construction operations in construction practice. Therefore, the above description is only based on one embodiment of the present invention, not all embodiments.

[0145] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0146] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An upward movable formwork suitable for bidirectional construction of simply supported concrete box girders, characterized in that: include: The main frame is composed of two parallel longitudinal beams, the two ends of the longitudinal beams are guide beams of the truss structure, the middle area is the main beam of the box beam structure, and the middle part of the main frame is provided with a connecting beam and a cantilever beam; Legs are arranged below the main frame, including front main legs, rear main legs and rear auxiliary legs, and are used to support the overall movable formwork. The front main legs and rear main legs are movable legs, and the rear auxiliary legs are fixed legs. The front main legs are supported on the piers, and the rear main legs and rear auxiliary legs are supported on the erected beam surface. The outer rib is suspended on the cantilever beam to support the outer mold system, and includes an outer rib transverse movement mechanism and a transverse locking structure. One end of the outer rib transverse movement mechanism is connected to the top of the outer rib, and the other end is connected to the main beam or the cantilever beam, and is used for the outer rib to open and close along the cantilever beam; the transverse locking structure is used to fix the transverse position of the outer rib; An outer formwork system is arranged on the outer ribs, the outer formwork system is laterally symmetrical and is used to support and fix the outer side of the concrete structure; An inner formwork system, which is arranged in the cavity of the outer formwork system and is used to support and fix the inner side of the concrete structure; End molds, which are arranged at the ends of the inner mold system and the outer mold system, and are used to support and fix the ends of the concrete structure, including top plate end molds, wing plate end molds, web plate end molds, bottom plate end molds and anchor box molds; A hanging walkway and an electric hoist are arranged below the connecting beam and can move longitudinally along the track to assist the crane in lifting the beam surface steel bars and tools; Hydraulic system, including front mold opening hydraulic system and rear mold opening and rear auxiliary outrigger hydraulic system; The electrical system is used to accurately control the movement of the mobile formwork, monitor the actual distance between the outer rib and the concrete beam when the mobile formwork passes through the hole, and detect the lateral deviation of the mobile formwork; determine the shaking degree of the mobile formwork according to the change trend of the actual distance, and automatically adjust the operation according to the preset program; And provide power to the mobile mold frame to drive the movement and operation of its various components.

2. The upward movable formwork applicable to bidirectional construction of simply supported concrete box girders according to claim 1 is characterized in that: The movable formwork adopts an upward structure, and the main frame is symmetrical in the horizontal and vertical directions; a hanger is arranged between the main frame and the outer ribs, and the hanger is installed in the casting state and removed in the demoulding and through-hole states, and the hanger passes through the concrete beam flange plate from the outside of the concrete beam web.

3. The upward movable formwork applicable to bidirectional construction of simply supported concrete box beams according to claim 1 is characterized in that: The front main support leg includes an upper crossbeam, a pad located below the upper crossbeam, a column located below the pad, a fixed diagonal brace located between the upper crossbeam and the column, a fixed flat brace located between the two columns, an adjustable diagonal brace located between the side surface of the upper crossbeam and the top surface of the pier, and a shifting trolley located above the upper crossbeam; The upper structures of the front main supporting leg and the rear main supporting leg are the same, and the front main supporting leg and the rear main supporting leg are provided with a transverse movement mechanism and a longitudinal movement mechanism.

4. The upward movable formwork applicable to bidirectional construction of simply supported concrete box beams according to claim 3 is characterized in that: A cushion stone device is provided at the lower end of the front main support leg column, and the cushion stone device can realize the horizontal anchoring function of the front main support leg without embedded parts; the front main support leg is provided with an adjustable diagonal brace rod, one end of the adjustable diagonal brace rod is provided on the front support leg cross beam, and the other end is provided on the cast beam end or pier top, which is used to prevent the front main support leg from overturning.

5. The upward movable formwork applicable to bidirectional construction of simply supported concrete box beams according to claim 1 is characterized in that: The mobile mold frame also includes a front mold opening hydraulic system and a rear mold opening and rear auxiliary leg hydraulic system. The front-end mold opening hydraulic system is composed of a four-valve pump station, a mold opening oil cylinder and pipelines, etc., and is used to realize the lateral movement of the longitudinal ribs; The rear mold opening and rear auxiliary outrigger hydraulic system is composed of a four-valve pump station, a third outrigger lifting cylinder, a mold opening cylinder and pipelines, etc., which are used to realize the lifting of the rear auxiliary outrigger and the horizontal movement of the rear mold opening longitudinal ribs; The pump station of the front mold opening hydraulic system has the same structure as the pump station of the rear mold opening and rear auxiliary support leg hydraulic system. Reversing the hoses of the pump station can realize the reverse construction of the bridge by the mobile formwork.

6. The upward movable formwork applicable to bidirectional construction of simply supported concrete box girders according to claim 1 is characterized in that: The mobile mold frame also includes: The anchoring system arranged at the rear of the main frame is used to fix the formwork on the completed bridge structure to prevent the formwork from being displaced or tilted due to its own weight, pressure during concrete pouring or other external forces during construction. By utilizing the beam seams of simply supported concrete beams, the anchoring device can realize the vertical anchoring function of the main frame without embedded parts.

7. The upward movable formwork applicable to bidirectional construction of simply supported concrete box beams according to claim 1 is characterized in that: The mobile mold frame also includes: A modular assembled counterweight system is provided at the rear end of the main frame, and the modular assembled counterweight system can be quickly disassembled into unit modules with smaller weight.

8. The upward movable formwork applicable to bidirectional construction of simply supported concrete box girders according to claim 1 is characterized in that: Laser sensors are arranged on both sides of the outer rib. When the movable formwork passes through the hole, the laser sensors on both sides of the outer rib detect the first actual distance and the second actual distance between the outer rib and the concrete beam in real time, and transmit the data to the electrical system; The electrical system draws a distance change curve according to the first actual distance and calculates a derivative function of the curve. If the derivative function corresponding to any moment in the unit time is greater than zero, less than zero or equal to zero, it is judged that the first actual distance continues to increase, continues to decrease or remains unchanged. If there are three items that meet the judgment condition in a unit time, it is judged that the movable mold frame shakes during the hole-passing process, and the longitudinal movement cylinders of the front main legs and the rear main legs are used to reduce the longitudinal movement speed of the movable mold frame; If the number of items that meet the judgment conditions per unit time is equal to two, or the number of items that meet the judgment conditions per unit time is equal to one and the corresponding derivative function is not equal to zero, it is determined that the actual distance between the outer rib and the concrete beam of the movable formwork changes during the through-hole process.

9. The upward movable formwork applicable to bidirectional construction of simply supported concrete box beams according to claim 8 is characterized in that: When the movable mold frame shakes during the hole-passing process, the actual wind speed is checked in real time according to the wind speed sensor arranged on the movable mold frame, and the electrical system compares the actual wind speed with the preset standard wind speed. If the actual wind speed is greater than the standard wind speed, the electrical system controls the movable mold frame to stop longitudinal movement; If the actual wind speed is less than or equal to the standard wind speed, the electrical system reduces the longitudinal speed of the mobile mold frame, and the reduced longitudinal speed is negatively correlated with the ratio of the actual wind speed to the standard wind speed; When the actual distance between the outer rib and the concrete beam of the movable formwork changes during the hole-passing process, The electrical system calculates an absolute value of a distance difference between a first actual distance and a second actual distance, If the distance difference is less than or equal to the difference evaluation value, it is determined that the movable mold frame does not generate lateral deviation during the through-hole process; If the distance difference is greater than the difference evaluation value, it is determined that the movable mold frame has a lateral offset during the through-hole process; Among them, the difference evaluation value is a preset value set according to the dangerous collision distance between the mobile formwork and the concrete beam.

10. The upward movable formwork applicable to bidirectional construction of simply supported concrete box beams according to claim 9, characterized in that: When the movable mold frame is laterally offset during the through-hole process, If the first actual distance is greater than the second actual distance, it is determined that the outer rib side corresponding to the second actual distance is closer to the concrete beam, and the lateral position of the movable formwork is adjusted by using the lateral oil cylinders of the front main legs and the rear main legs to lateral move the movable formwork toward the outer rib side corresponding to the second actual distance; If the first actual distance is smaller than the second actual distance, it is determined that the outer rib side corresponding to the first actual distance is closer to the concrete beam, and the lateral position of the movable formwork is adjusted by using the lateral oil cylinders of the front main legs and the rear main legs to lateral move the movable formwork toward the outer rib side corresponding to the first actual distance; When adjusting the lateral position of the mobile mold frame, the electrical system calculates the rate of change of the difference between the first actual distance and the standard distance, calculates the critical time according to the standard distance and the rate of change of the difference, and calculates the safe longitudinal movement length of the mobile mold frame at the current longitudinal movement speed; The electrical system adjusts the lateral movement speed of the movable mold frame by using the lateral movement cylinders of the front main legs and the rear main legs according to the safe longitudinal movement length of the movable mold frame, and the lateral movement speed is negatively correlated with the safe longitudinal movement length.

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