Hanging basket suspended pouring and steel beam hoisting integrated construction method and used hanging basket structure

Abstract

The invention discloses a hanging basket suspended casting and steel beam hoisting integrated construction method and a used hanging basket structure, the method comprises concrete box beam casting construction and steel box beam hoisting construction which are performed in sequence, and the concrete box beam casting construction comprises initial beam section cast-in-place construction and subsequent beam section cantilever construction which are performed in sequence; after cast-in-place construction of an initial beam section is completed, a cast-in-place support is dismantled, then follow-up beam section cantilever construction is carried out, after casting of the last section of beam section cantilever construction is completed, side span closure operation is carried out, and then hoisting construction of the steel box beam is carried out. The problem that the construction method is complex during existing hanging basket suspended pouring and steel beam hoisting construction is solved.

Description

Technical Field

[0001] The invention relates to the technical field of hanging basket suspended casting construction, in particular to a hanging basket suspended casting and steel beam hoisting integrated construction method and a hanging basket structure used therein. Background Art

[0002] Hanging basket construction is a construction technology commonly used in cantilever casting of bridges. It is widely used in bridge projects with large spans, complex structures and special terrains. The main advantages of hanging basket construction include small impact on the environment, high construction accuracy, strong applicability, etc., and it can be constructed without interfering with the surrounding environment and traffic.

[0003] The construction of the hanging basket usually consists of a load-bearing structure, a suspension system, a travel system and an anchoring system, which can be adjusted and moved according to the needs of the project. During the construction process, the hanging basket completes the construction of the bridge segment by pouring concrete and prestressing on the already poured beam segment.

[0004] When carrying out hanging basket construction, it is usually coordinated with steel beam hoisting construction. In the existing technology, this construction step is often cumbersome, and the hanging basket structure used is relatively complex and has low safety. Therefore, in order to solve the above problems, the existing hanging basket construction method is improved. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated construction method of hanging basket suspended casting and steel beam hoisting and a hanging basket structure used therein, so as to solve the problems of complex construction methods and low safety of the hanging basket structure used in existing hanging basket suspended casting and steel beam hoisting construction.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: A construction method for hanging basket hanging casting and steel beam hoisting integration, including the concrete box beam casting construction and steel box beam hoisting construction carried out in sequence, the concrete box beam casting construction includes the initial beam section cast-in-place construction and the subsequent beam section cantilever construction carried out in sequence, after the initial beam section cast-in-place construction is completed, the cast-in-place bracket is removed and then the subsequent beam section cantilever construction is carried out, the subsequent beam section cantilever construction includes the following steps: A, hanging basket assembly and anchoring; B, bottom formwork installation; C, steel bar and prestress installation; D, end formwork installation; E, inspection and verification F. Concrete curing; G. Prestressed tendons, formwork removal, roughening; H. Prestressed tensioning, grouting and anchoring; I. After the track is in place and anchored, it is removed and anchored, and the hanging basket moves; j. The hanging basket moves in place and is installed and anchored; K. The inclined cables are hung and tensioned two sections later; L. Steps A to K are repeated until the last section of the cantilever construction of the beam section is completed. After the casting of the last section of the cantilever construction of the beam section is completed, the side span is closed, and then the steel box girder is hoisted.

[0007] The existing construction method has been improved, and the hanging basket suspended casting construction and steel box girder hoisting construction can be completed quickly and orderly. The main beam in this scheme is a hybrid beam structure, which includes a concrete box girder part and a steel box girder part arranged in the main span. Therefore, a hanging basket suspended casting and steel beam hoisting integrated construction method is adopted. Specifically, the initial beam section is cast-in-place first. The initial beam section has two pieces, which are located on both sides of the center line of the river. Then, on this basis, the subsequent beam section cantilever construction is carried out. The cantilever construction of the subsequent beam section is carried out simultaneously at both ends of the initial beam section. After the cantilever construction of the subsequent beam section is completed, the side span closing operation is carried out first. This can ensure the stability of the completed beam section and is more conducive to the final hoisting construction of the middle span steel box girder.

[0008] As a further preference of the present invention, during the cantilever construction of the subsequent beam section, it is also necessary to lay out a prestressing system and monitoring points. After the bottom formwork is installed, the laid out prestressing system is used to carry out 120% graded prestressing of the hanging basket. After prestressing, grouting and anchor sealing, the monitoring units of the monitoring points are used to conduct settlement observations to monitor the main beam elevation.

[0009] During the suspended pouring construction process, the stress state of the beam is complex and is prone to problems such as inelastic deformation. If the preloading is not done carefully, it may cause web cracks in the beam structure and cross-sectional dimensions that do not meet the requirements of the specifications. Therefore, it is necessary to use a preloading system for sufficient preloading.

[0010] As a further preferred embodiment of the present invention, after the construction of the last section of the cantilever construction of the beam section is completed, the cable installation and tensioning are carried out simultaneously.

[0011] As a further preferred embodiment of the present invention, the side span closing operation includes the following steps: setting up a side span closing support, prestressing the cast-in-place section of the side span according to 110% of the load design value, and constructing the cast-in-place section of the side span; tensioning the longitudinal prestress of the cast-in-place section of the side span; moving the hanging basket forward to the last section of the cantilever construction of the beam section as a supporting structure for the side span closing section; setting 1 / 2 water tank counterweights at both ends of the side span closing section, installing a temporary lock for the side span closing section, constructing the side span closing section, and simultaneously draining water during concrete pouring. After the closing is completed, the temporary consolidation and the side span hanging basket are removed.

[0012] As a further preferred embodiment of the present invention, before the hoisting construction of the steel box girder, the mid-span side hanging basket is transformed into a hanging basket crane. The hoisting construction of the steel box girder includes the hoisting construction of the steel-concrete combined section, the hoisting construction of the standard section of the steel box girder and the closing construction of the mid-span closing section of the steel box girder. The hoisting construction of the steel-concrete combined section includes the following steps: the steel box girder used for the steel-concrete combined section is transported to the bridge position by ship; the first section of the steel-concrete combined section is hoisted and installed, and it is consolidated and connected with the concrete beam section, steel bars and prestress are installed, and concrete is poured; the second section of the steel-concrete combined section is hoisted and installed, and it is welded and connected with the first section, steel bars and prestress are installed, and concrete is poured; the longitudinal prestressing of the steel-concrete combined section is tensioned; after the hoisting construction of the steel-concrete combined section is completed, the hanging basket is moved forward to the steel-concrete combined section, and then the hoisting construction of the standard section of the steel box girder is carried out. The hoisting construction of the standard section of the steel box girder includes the following steps: the hanging basket is moved forward to the steel-concrete combined section, and the corresponding cables are installed and tensioned, Lift and install the beam section of the standard steel box girder segment and symmetrically tension the corresponding inclined cables. After each beam section construction of a standard steel box girder segment is completed, the hanging basket is moved forward to the beam section. When the inclined cables at the side spans are symmetrically tensioned, the iron sand counterweight concrete of the side spans is poured. After the tensioning here is completed, the cast-in-place bracket of the side span is removed to complete the lifting construction of the standard steel box girder segment. After the lifting construction of the standard steel box girder segment is completed, the closing construction of the middle span closure section of the steel box girder is carried out. The closing construction of the middle span closure section of the steel box girder includes the following steps: the hanging basket crane at the large mileage on one side retreats to the beam section of the penultimate steel box girder standard segment, and the hanging basket crane at the large mileage on the other side is further moved forward to the beam section of the last steel box girder standard segment. After jacks are set between the beam sections of the standard steel box girder segments on both sides, they are temporarily locked and construction observations are carried out; the middle span closure section of the steel box girder is matched according to the observation data, the middle span closure is carried out, and finally the temporarily locked construction span mid-bridge deck is removed.

[0013] As a further preferred embodiment of the present invention, after the closure construction of the middle span closure section of the steel box girder is completed, the cable tension of the entire bridge needs to be adjusted, and the settlement observation period is 180 days.

[0014] The hanging basket structure used in the integrated construction method of hanging basket suspended casting and steel beam hoisting described in any of the above-mentioned methods includes a main truss load-bearing mechanism, a suspension mechanism, an anchoring mechanism, a walking mechanism and a template mechanism, the walking mechanism is arranged on the top surface of the poured beam section, the bottom surface of the main truss load-bearing mechanism is connected to the sliding track of the walking mechanism, and a forward anti-overturning device is detachably provided in the middle part of the sliding track of the walking mechanism. After the forward anti-overturning device is installed, its bottom surface touches the top surface of the bottom rod of the main truss load-bearing mechanism, the top of the suspension mechanism is connected to the main truss load-bearing mechanism, and the bottom of the suspension mechanism is connected to the supporting structure of the template mechanism, the anchoring mechanism includes a main truss anchoring mechanism and a template anchoring mechanism, the main truss anchoring mechanism is arranged at the rear end of the main truss load-bearing mechanism and is connected to the reserved hole position of the box beam, the template anchoring mechanism is arranged at the front end of the poured beam section, the template anchoring mechanism passes downward through the poured beam section and is connected to the supporting structure of the template mechanism, and the template mechanism includes side templates, outer templates and inner template mechanisms.

[0015] A forward anti-overturning device is set in the middle of the sliding track, which can effectively share the pressure on the hook wheel of the rear hook wheel group. It can not only effectively extend the service life of the hook wheel in the rear hook wheel group, but also effectively prevent the overturning problem caused by moving the hanging basket too fast, thereby improving engineering efficiency.

[0016] As a further preferred embodiment of the present invention, the walking mechanism includes a sliding rail bolster, a sliding rail, a rear hook wheel group and a hydraulic pushing mechanism, the sliding rail bolster is laid at the bottom of the sliding rail, the sliding rails are arranged in parallel, each sliding rail is composed of at least two sections, the sliding rail joint misalignment is less than 3mm, the rear hook wheel group is arranged at the rear of the sliding rail, the top surface of the hook wheel of the rear hook wheel group touches the bottom surface of the upper flange of the sliding rail, the hydraulic pushing mechanism is arranged at the front of the sliding rail, and the front end of the output shaft of the hydraulic pushing mechanism is connected to the rail sliding connection structure arranged at the front end of the bottom of the main truss load-bearing mechanism; the density of the sliding rail bolsters arranged at the front of the sliding rail is greater than the density of the sliding rail bolsters arranged in the middle and rear of the sliding rail.

[0017] Each sliding track is composed of at least two sections, which makes it easier to assemble and disassemble, and the movement is convenient and rapid. When the main truss load-bearing mechanism needs to be moved, it only needs to use the output shaft of the hydraulic push mechanism to achieve its movement smoothly and simply.

[0018] As a further preferred embodiment of the present invention, the forward anti-overturning device includes an inverted "U"-shaped clamping structure, the clamping position width of the inverted "U"-shaped clamping structure is adapted to the width of the bottom rod of the main truss load-bearing mechanism and the width of the sliding track of the walking mechanism, the lower end of the inverted "U"-shaped clamping structure is detachably connected to the sliding track pad of the walking mechanism, and balls are provided on the top surface and both sides of the clamping position of the "U"-shaped clamping structure.

[0019] When it is necessary to move, first install the inverted "U"-shaped clamping structure, and then remove the main truss anchoring mechanism. In this way, the inverted "U"-shaped clamping structure can limit the bottom rod of the main truss load-bearing mechanism during the process, thereby preventing the main truss load-bearing mechanism from overturning. The ball bearings arranged on the top surface and both sides of the clamping position of the "U"-shaped clamping structure can make the main truss load-bearing mechanism smoother during the movement.

[0020] As a further preferred embodiment of the present invention, the suspension mechanism includes a side mold suspension mechanism, a bottom mold suspension mechanism and an inner mold suspension mechanism, the upper ends of the side mold suspension mechanism and the inner mold suspension mechanism are connected to the front upper crossbeam, and the lower ends of the side mold suspension mechanism and the inner mold suspension mechanism are respectively connected to the front end of the side mold sliding beam and the front end of the inner mold sliding beam, the bottom mold suspension mechanism includes a bottom basket rear lower crossbeam suspension mechanism and a bottom basket front lower crossbeam suspension mechanism, the top of the bottom basket rear lower crossbeam suspension mechanism and the top of the bottom basket front lower crossbeam suspension mechanism are respectively connected to the cross link and the front upper crossbeam, the bottom of the bottom basket rear lower crossbeam suspension mechanism and the bottom of the bottom basket front lower crossbeam suspension mechanism are respectively connected to the bottom basket rear lower crossbeam and the bottom of the bottom mold The template anchoring mechanism comprises a side template anchoring mechanism, an outer template anchoring mechanism and an inner template anchoring mechanism, the side template anchoring mechanism comprises a side template anchoring structure and a side template sliding beam load-bearing hanger, the side template anchoring structure passes downward through the cast beam section and is connected to the side template sliding beam load-bearing hanger below the cast beam section, the outer template anchoring mechanism is arranged in the middle of the front end of the cast beam section, the outer template anchoring mechanism passes downward through the cast beam section and is connected to the rear lower beam of the bottom basket at the bottom of the bottom template below the cast beam section, the inner template anchoring mechanism comprises an inner template anchoring structure and an inner template sliding beam load-bearing hanger, the inner template anchoring structure passes downward through the cast beam section and is connected to the inner template sliding beam load-bearing hanger below the cast beam section.

[0021] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects: 1. The existing construction method has been improved, and the hanging basket suspended casting construction and steel box girder hoisting construction can be completed quickly and orderly. The main beam in this scheme is a hybrid beam structure, which includes a concrete box girder part and a steel box girder part arranged in the main span. Therefore, a hanging basket suspended casting and steel beam hoisting integrated construction method is adopted. Specifically, the initial beam section is first cast-in-place. The initial beam section has two pieces, which are located on both sides of the center line of the river. Then, on this basis, the subsequent beam section cantilever construction is carried out. The cantilever construction of the subsequent beam section is carried out simultaneously at both ends of the initial beam section. After the cantilever construction of the subsequent beam section is completed, the side span closing operation is carried out first. This can ensure the stability of the completed beam section and is more conducive to the final hoisting construction of the middle span steel box girder.

[0022] 2. During the hanging basket suspended pouring construction process, the stress state of the beam is complex and it is prone to problems such as inelastic deformation. If the preloading is not careful, it may cause web cracks in the beam structure and the cross-sectional dimensions do not meet the requirements of the specifications. Therefore, it is necessary to use the preloading system for sufficient preloading.

[0023] 3. A forward anti-overturning device is set in the middle of the sliding track, which can effectively share the pressure on the hook wheel of the rear hook wheel group. It can not only effectively extend the service life of the hook wheel in the rear hook wheel group, but also effectively prevent the overturning problem caused by moving the hanging basket too fast, thereby improving engineering efficiency.

[0024] 4. Each sliding track is composed of at least two sections, which makes it easier to assemble and disassemble, and the movement is convenient and rapid. When the main truss load-bearing mechanism needs to be moved, it only needs to use the output shaft of the hydraulic push mechanism to achieve its movement smoothly and simply.

[0025] 5. When it is necessary to move, first install the inverted "U"-shaped clamping structure, and then remove the main truss anchoring mechanism. In this way, the inverted "U"-shaped clamping structure can limit the bottom rod of the main truss load-bearing mechanism during this process, thereby preventing the main truss load-bearing mechanism from overturning. The ball bearings arranged on the top surface and both sides of the clamping position of the "U"-shaped clamping structure can make the main truss load-bearing mechanism smoother during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention.

[0027] Figure 2 It is a structural schematic diagram of the walking mechanism of the present invention.

[0028] Figure 3 It is a structural schematic diagram of the main truss load-bearing mechanism of the present invention.

[0029] Figure 4 It is a schematic diagram of the layout of the suspension mechanism of the present invention.

[0030] Figure 5 It is a schematic diagram of the layout of the template anchoring mechanism of the present invention.

[0031] Figure 6 It is a structural schematic diagram of the inverted "U"-shaped clamping structure of the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Specific embodiments

[0038] A construction method for hanging basket hanging casting and steel beam hoisting integration, including the concrete box beam casting construction and steel box beam hoisting construction carried out in sequence, the concrete box beam casting construction includes the initial beam section cast-in-place construction and the subsequent beam section cantilever construction carried out in sequence, after the initial beam section cast-in-place construction is completed, the cast-in-place bracket is removed and then the subsequent beam section cantilever construction is carried out, the subsequent beam section cantilever construction includes the following steps: A, hanging basket assembly and anchoring; B, bottom formwork installation; C, steel bar and prestress installation; D, end formwork installation; E, inspection and verification F. Concrete curing; G. Prestressed tendons, formwork removal, roughening; H. Prestressed tensioning, grouting and anchoring; I. After the track is in place and anchored, it is removed and anchored, and the hanging basket moves; j. The hanging basket moves in place and is installed and anchored; K. The inclined cables are hung and tensioned two sections later; L. Steps A to K are repeated until the last section of the cantilever construction of the beam section is completed. After the casting of the last section of the cantilever construction of the beam section is completed, the side span is closed, and then the steel box girder is hoisted.

[0039] The existing construction method has been improved, and the hanging basket suspended casting construction and steel box girder hoisting construction can be completed quickly and orderly. The main beam in this scheme is a hybrid beam structure, which includes a concrete box girder part and a steel box girder part arranged in the main span. Therefore, a hanging basket suspended casting and steel beam hoisting integrated construction method is adopted. Specifically, the initial beam section is cast-in-place first. The initial beam section has two pieces, which are located on both sides of the center line of the river. Then, on this basis, the subsequent beam section cantilever construction is carried out. The cantilever construction of the subsequent beam section is carried out simultaneously at both ends of the initial beam section. After the cantilever construction of the subsequent beam section is completed, the side span closing operation is carried out first. This can ensure the stability of the completed beam section and is more conducive to the final hoisting construction of the middle span steel box girder. Specific embodiments

[0040] This embodiment further illustrates the cantilever construction of subsequent beam sections on the basis of specific embodiment 1. During the cantilever construction of subsequent beam sections, it is also necessary to lay out a prestressing system and monitoring points. After the bottom formwork is installed, the laid out prestressing system is used to carry out 120% graded prestressing of the hanging basket. After prestressing, grouting and anchoring, the monitoring units of the monitoring points are used to conduct settlement observations to monitor the elevation of the main beam. Specific embodiments

[0041] This embodiment further illustrates the cantilever construction of the beam section on the basis of the specific embodiment 1, and after the construction of the last segment of the cantilever construction of the beam section is completed, the cable installation and tensioning are carried out simultaneously. Specific embodiments

[0042] This embodiment further illustrates the side span closing operation on the basis of the specific embodiment 1, and the side span closing operation includes the following steps: setting up the side span closing support, prestressing the cast-in-place section of the side span according to 110% of the load design value, and constructing the cast-in-place section of the side span; tensioning the longitudinal prestress of the cast-in-place section of the side span; moving the hanging basket forward to the last section of the cantilever construction of the beam section as the supporting structure of the side span closing section; setting 1 / 2 water tank counterweights at both ends of the side span closing section, installing a temporary lock for the side span closing section, constructing the side span closing section, and simultaneously draining water during concrete pouring. After the closing is completed, the temporary consolidation and the side span hanging basket are removed.

[0043] During the suspended pouring construction process, the stress state of the beam is complex and is prone to problems such as inelastic deformation. If the preloading is not done carefully, it may cause web cracks in the beam structure and cross-sectional dimensions that do not meet the requirements of the specifications. Therefore, it is necessary to use a preloading system for sufficient preloading. Specific embodiments

[0044] This embodiment further illustrates the hoisting construction of the steel box girder on the basis of the specific embodiment 1. Before the hoisting construction of the steel box girder, the mid-span side hanging basket is transformed into a hanging basket crane. The hoisting construction of the steel box girder includes the hoisting construction of the steel-concrete combined section, the hoisting construction of the standard section of the steel box girder and the closing construction of the mid-span closing section of the steel box girder. The hoisting construction of the steel-concrete combined section includes the following steps: the steel box girder for the steel-concrete combined section is transported to the bridge location by ship; the first section of the steel-concrete combined section is hoisted and installed, and it is consolidated and connected with the concrete beam section, steel bars and prestress are installed, and concrete is poured; the second section of the steel-concrete combined section is hoisted and installed, and it is welded and connected with the first section, steel bars and prestress are installed, and concrete is poured; the longitudinal prestressing of the steel-concrete combined section is tensioned; after the hoisting construction of the steel-concrete combined section is completed, the hanging basket is moved forward to the steel-concrete combined section, and then the hoisting construction of the standard section of the steel box girder is carried out. The hoisting construction of the standard section of the steel box girder includes the following steps: the hanging basket is moved forward to the steel-concrete combined section The corresponding cables are installed and tensioned. The beam sections of the standard steel box girder sections are hoisted and installed, and the corresponding inclined cables are tensioned symmetrically. After each beam section of the standard steel box girder section is completed, the hanging basket is moved forward to the beam section. When the inclined cables at the side spans are tensioned symmetrically, the iron sand counterweight concrete of the side spans is poured. After the tensioning here is completed, the cast-in-place brackets of the side spans are removed to complete the hoisting construction of the standard steel box girder sections. After the hoisting construction of the standard steel box girder sections is completed, the closing construction of the closing section of the middle span of the steel box girder is carried out. The closing construction of the mid-span closing section of the beam includes the following steps: the basket crane at the large mileage on one side retreats to the beam section of the penultimate steel box girder standard section, and the basket crane at the large mileage on the other side moves further forward to the beam section of the last steel box girder standard section. After jacks are set between the beam sections of the steel box girder standard sections on both sides, they are temporarily locked and construction observations are carried out; the mid-span closing section of the steel box girder is cut according to the observation data, the mid-span closing is carried out, and finally the temporarily locked construction span mid-bridge deck is removed. Specific embodiments

[0045] This embodiment further illustrates the closing construction of the closing section of the middle span of the steel box girder on the basis of the specific embodiment 5. After the closing construction of the closing section of the middle span of the steel box girder is completed, the cable tension of the entire bridge needs to be adjusted, and the settlement observation period is 180 days. Specific embodiments

[0046] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 A hanging basket structure is shown, and the hanging basket structure used in any of the above-mentioned hanging basket hanging casting and steel beam hoisting integrated construction methods includes a main truss load-bearing mechanism 1, a suspension mechanism 2, an anchoring mechanism 3, a walking mechanism 4 and a template mechanism. The walking mechanism 4 is arranged on the top surface of the poured beam section, and the bottom surface of the main truss load-bearing mechanism 1 is connected to the sliding track 42 of the walking mechanism 4. The middle part of the sliding track 42 of the walking mechanism 4 is detachably provided with a forward anti-overturning device 5. After the forward anti-overturning device 5 is installed, its bottom surface is connected to the top of the bottom rod of the main truss load-bearing mechanism 1. The top of the suspension mechanism 2 is connected to the main truss load-bearing mechanism 1, and the bottom of the suspension mechanism 2 is connected to the supporting structure of the formwork mechanism. The anchoring mechanism 3 includes a main truss anchoring mechanism 31 and a formwork anchoring mechanism 32. The main truss anchoring mechanism 31 is arranged at the rear end of the main truss load-bearing mechanism 1 and is connected to the reserved hole position of the box beam. The formwork anchoring mechanism 32 is arranged at the front end of the cast beam section. The formwork anchoring mechanism 32 passes downward through the cast beam section and is connected to the supporting structure of the formwork mechanism. The formwork mechanism includes side formwork, outer formwork and inner formwork mechanism.

[0047] A forward anti-overturning device is set in the middle of the sliding track, which can effectively share the pressure on the hook wheel of the rear hook wheel group. It can not only effectively extend the service life of the hook wheel in the rear hook wheel group, but also effectively prevent the overturning problem caused by moving the hanging basket too fast, thereby improving engineering efficiency. Specific embodiments

[0048] This embodiment further illustrates the walking mechanism 4 on the basis of the specific embodiment 7, the walking mechanism 4 includes a sliding rail bolster 41, a sliding rail 42, a rear hook wheel group 43 and a hydraulic pushing mechanism 44, the sliding rail bolster 41 is laid on the bottom of the sliding rail 42, the sliding rails 42 are arranged in parallel, each sliding rail 42 is composed of at least two sections, the sliding rail 42 joint misalignment is less than 3mm, the rear hook wheel group 43 is arranged at the rear of the sliding rail 42, the top surface of the hook wheel of the rear hook wheel group 43 touches the bottom surface of the upper flange of the sliding rail 42, the hydraulic pushing mechanism 44 is arranged at the front of the sliding rail 42, the front end of the output shaft of the hydraulic pushing mechanism 44 is connected to the rail sliding connection structure 6 arranged at the front end of the bottom of the main truss load-bearing mechanism 1; the density of the sliding rail bolster 41 arranged at the front of the sliding rail 42 is greater than the density of the sliding rail bolster 41 arranged in the middle and rear of the sliding rail 42.

[0049] Each sliding track is composed of at least two sections, which makes it easier to assemble and disassemble, and the movement is convenient and rapid. When the main truss load-bearing mechanism needs to be moved, it only needs to use the output shaft of the hydraulic push mechanism to achieve its movement smoothly and simply. Specific embodiments

[0050] This embodiment further illustrates the forward anti-overturning device 5 on the basis of the specific embodiment 7, and the forward anti-overturning device 5 includes an inverted "U"-shaped clamping structure, and the clamping width of the inverted "U"-shaped clamping structure is adapted to the width of the bottom rod of the main truss load-bearing mechanism 1 and the width of the sliding track 42 of the walking mechanism, and the lower end of the inverted "U"-shaped clamping structure is detachably connected to the sliding track pad 41 of the walking mechanism 4, and balls 7 are provided on the top surface and both sides of the clamping position of the "U"-shaped clamping structure.

[0051] When it is necessary to move, first install the inverted "U"-shaped clamping structure, and then remove the main truss anchoring mechanism. In this way, the inverted "U"-shaped clamping structure can limit the bottom rod of the main truss load-bearing mechanism during the process, thereby preventing the main truss load-bearing mechanism from overturning. The ball bearings arranged on the top surface and both sides of the clamping position of the "U"-shaped clamping structure can make the main truss load-bearing mechanism smoother during the movement. Specific embodiment 10: This embodiment further illustrates the suspension mechanism 2 on the basis of the specific embodiment 7, the suspension mechanism 2 comprises a side mold suspension mechanism 21, a bottom mold suspension mechanism 22 and an inner mold suspension mechanism 23, the upper ends of the side mold suspension mechanism 21 and the inner mold suspension mechanism 23 are connected to the front upper cross beam 13, the lower ends of the side mold suspension mechanism 21 and the inner mold suspension mechanism 23 are respectively connected to the front end of the side mold sliding beam 8 and the front end of the inner mold sliding beam 9, the bottom mold suspension mechanism 22 comprises a bottom basket rear lower cross beam suspension mechanism 221 and a bottom basket front lower cross beam suspension mechanism 222, the top of the bottom basket rear lower cross beam suspension mechanism 221 and the top of the bottom basket front lower cross beam suspension mechanism 222 are respectively connected to the cross link 12 and the front upper cross beam 13, the bottom of the bottom basket rear lower cross beam suspension mechanism 221 and the bottom of the bottom basket front lower cross beam suspension mechanism 222 are They are respectively connected to the lower rear cross beam of the bottom basket at the bottom of the bottom mold and the lower front cross beam of the bottom basket at the bottom of the bottom mold; the template anchoring mechanism 32 includes a side template anchoring mechanism 321, an outer template anchoring mechanism 322 and an inner template anchoring mechanism 323, the side template anchoring mechanism 321 includes a side template anchoring structure and a side template sliding beam load-bearing hanger, the side template anchoring structure passes downward through the cast beam section and is connected to the side template sliding beam load-bearing hanger below the cast beam section, the outer template anchoring mechanism 322 is arranged in the middle of the front end of the cast beam section, the outer template anchoring mechanism 322 passes downward through the cast beam section and is connected to the lower rear cross beam of the bottom basket at the bottom of the bottom mold below the cast beam section, the inner template anchoring mechanism 323 includes an inner template anchoring structure and an inner template sliding beam load-bearing hanger, the inner template anchoring structure passes downward through the cast beam section and is connected to the inner template sliding beam load-bearing hanger below the cast beam section.

[0053] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction method integrating hanging basket pouring and steel beam hoisting, characterized in that: The method comprises the following steps: casting of concrete box beam and hoisting of steel box beam, wherein the casting of concrete box beam comprises the cast-in-place construction of initial beam section and cantilever construction of subsequent beam section, wherein the cantilever construction of subsequent beam section is carried out after the cast-in-place support is removed after the cast-in-place construction of initial beam section is completed, and the cantilever construction of subsequent beam section is carried out, wherein the cantilever construction of subsequent beam section comprises the following steps: A, assembling and anchoring of hanging basket; B, installing bottom formwork; C, installing steel bar and prestressing; D, installing end formwork; E, inspecting and accepting, symmetrical casting of concrete; F, curing of concrete; G, threading of prestressing bundle, removal of formwork and roughening; H, prestressing tensioning, grouting and anchor sealing; I, after the track is in place and anchored, it is removed and then anchored, and the hanging basket moves; j, the hanging basket moves in place and then anchored after installation; K, hanging and tensioning of inclined cables are carried out for two delayed sections; L, repeating steps A to K until the construction of the last section of the cantilever construction of the beam section is completed, and after the casting of the last section of the cantilever construction of the beam section is completed, the side span closing operation is carried out, and then the hoisting construction of the steel box beam is carried out.

2. The integrated construction method of hanging basket casting and steel beam hoisting according to claim 1 is characterized in that: During the cantilever construction of the subsequent beam section, it is also necessary to lay out the prestressing system and monitoring points. After the bottom formwork is installed, the prestressing system is used to carry out 120% graded prestressing of the hanging basket. After prestressing, grouting and anchor sealing, the monitoring units of the monitoring points are used to conduct settlement observations to monitor the main beam elevation.

3. The integrated construction method of hanging basket casting and steel beam hoisting according to claim 1 is characterized in that: After the construction of the last section of the cantilever construction of the beam section is completed, the cable installation and tensioning are carried out simultaneously.

4. The integrated construction method of hanging basket casting and steel beam hoisting according to claim 1 is characterized in that: The side span closing operation includes the following steps: erecting a side span closing support, prestressing the cast-in-place section of the side span according to 110% of the load design value, and constructing the cast-in-place section of the side span; tensioning the longitudinal prestress of the cast-in-place section of the side span; moving the hanging basket forward to the last section of the cantilever construction of the beam section as a supporting structure for the side span closing section; setting 1 / 2 water tank counterweights at both ends of the side span closing section, installing a temporary lock for the side span closing section, constructing the side span closing section, and simultaneously draining water during concrete pouring. After the closing is completed, the temporary consolidation and the side span hanging basket are removed.

5. The integrated construction method of hanging basket casting and steel beam hoisting according to claim 1 is characterized in that: Before the lifting construction of the steel box girder, the mid-span side hanging basket is transformed into a hanging basket crane. The lifting construction of the steel box girder includes the lifting construction of the steel-concrete combined section, the lifting construction of the standard section of the steel box girder and the closing construction of the mid-span closing section of the steel box girder. The lifting construction of the steel-concrete combined section includes the following steps: the steel box girder used for the steel-concrete combined section is transported to the bridge location by ship; the first section of the steel-concrete combined section is lifted and installed, and it is consolidated and connected with the concrete beam section, steel bars and prestressing are installed, and concrete is poured; the second section of the steel-concrete combined section is lifted and installed, and it is welded and connected with the first section, steel bars and prestressing are installed, and concrete is poured; the longitudinal prestressing of the steel-concrete combined section is tensioned; after the lifting construction of the steel-concrete combined section is completed, the hanging basket is moved forward to the steel-concrete combined section, and then the lifting construction of the standard section of the steel box girder is carried out. The lifting construction of the standard section of the steel box girder includes the following steps: the hanging basket is moved forward to the steel-concrete combined section, the corresponding cables are installed and tensioned, and the steel box is lifted and installed The corresponding inclined cables are symmetrically tensioned for the beam sections of the standard section of the beam. After each beam section construction of a standard section of the steel box beam is completed, the hanging basket is moved forward to the beam section. When the inclined cables at the side spans are symmetrically tensioned, the iron sand counterweight concrete of the side spans is poured. After the tensioning here is completed, the cast-in-place brackets of the side spans are removed to complete the hoisting construction of the standard section of the steel box beam. After the hoisting construction of the standard section of the steel box beam is completed, the closing construction of the middle span closure section of the steel box beam is carried out. The closing construction of the middle span closure section of the steel box beam includes the following steps: the hanging basket crane at the large mileage on one side retreats to the beam section of the penultimate section of the standard section of the steel box beam, and the hanging basket crane at the large mileage on the other side is further moved forward to the beam section of the last section of the standard section of the steel box beam. After jacks are set between the beam sections of the standard sections of the steel box beams on both sides, they are temporarily locked and construction observations are carried out; the middle span closure section of the steel box beam is matched according to the observation data, the middle span closure is carried out, and finally the bridge deck in the middle of the temporarily locked construction span is removed.

6. The integrated construction method of hanging basket casting and steel beam hoisting according to claim 5 is characterized in that: After the closure construction of the middle span closure section of the steel box girder is completed, the cable tension of the entire bridge needs to be adjusted, and the settlement observation period is 180 days.

7. The hanging basket structure used in the integrated construction method of hanging basket suspended casting and steel beam hoisting as described in any one of claims 1 to 6 is characterized by: The invention comprises a main truss load-bearing mechanism (1), a suspension mechanism (2), an anchor mechanism (3), a walking mechanism (4) and a formwork mechanism, wherein the walking mechanism (4) is arranged on the top surface of the poured beam section, the bottom surface of the main truss load-bearing mechanism (1) is connected to a sliding track (42) of the walking mechanism (4), a forward anti-overturning device (5) is detachably provided in the middle of the sliding track (42) of the walking mechanism (4), and after the forward anti-overturning device (5) is installed, its bottom surface contacts the top surface of the bottom rod of the main truss load-bearing mechanism (1), and the top of the suspension mechanism (2) contacts the main truss load-bearing mechanism (1). The main truss bearing mechanism (1) is connected to the main truss bearing mechanism (1), the bottom of the suspension mechanism (2) is connected to the supporting structure of the formwork mechanism, the anchoring mechanism (3) comprises a main truss anchoring mechanism (31) and a formwork anchoring mechanism (32), the main truss anchoring mechanism (31) is arranged at the rear end of the main truss bearing mechanism (1) and connected to the reserved hole position of the box beam, the formwork anchoring mechanism (32) is arranged at the front end of the poured beam section, the formwork anchoring mechanism (32) passes downward through the poured beam section and is connected to the supporting structure of the formwork mechanism, and the formwork mechanism comprises a side formwork, an outer formwork and an inner formwork mechanism.

8. The hanging basket structure according to claim 7, characterized in that: The walking mechanism (4) comprises a sliding track cushion (41), a sliding track (42), a rear hook wheel group (43) and a hydraulic pushing mechanism (44); the sliding track cushion (41) is laid on the bottom of the sliding track (42); the sliding tracks (42) are arranged in parallel; each sliding track (42) is composed of at least two sections; the joint misalignment of the sliding track (42) is less than 3 mm; the rear hook wheel group (43) is arranged at the rear of the sliding track (42); the top surface of the hook wheel of the rear hook wheel group (43) contacts the bottom surface of the upper flange of the sliding track (42); the hydraulic pushing mechanism (44) is arranged at the front of the sliding track (42); the front end of the output shaft of the hydraulic pushing mechanism (44) is connected to the track sliding connection structure (6) arranged at the front end of the bottom of the main truss load-bearing mechanism (1); the density of the sliding track cushion (41) arranged at the front of the sliding track (42) is greater than the density of the sliding track cushion (41) arranged at the middle and rear of the sliding track (42).

9. The hanging basket structure according to claim 7, characterized in that: The forward anti-overturning device (5) comprises an inverted "U"-shaped clamping structure, the clamping width of the inverted "U"-shaped clamping structure is adapted to the width of the bottom rod of the main truss load-bearing mechanism (1) and the width of the sliding track (42) of the walking mechanism, the lower end of the inverted "U"-shaped clamping structure is detachably connected to the sliding track cushion (41) of the walking mechanism (4), and the top surface and both sides of the clamping position of the "U"-shaped clamping structure are provided with balls (7).

10. The hanging basket structure according to claim 7, characterized in that: The suspension mechanism (2) comprises a side mold suspension mechanism (21), a bottom mold suspension mechanism (22) and an inner mold suspension mechanism (23); the upper ends of the side mold suspension mechanism (21) and the inner mold suspension mechanism (23) are connected to the front upper cross beam (13); the lower ends of the side mold suspension mechanism (21) and the inner mold suspension mechanism (23) are connected to the front end of the side mold sliding beam (8) and the front end of the inner mold sliding beam (9), respectively; The mechanism (22) comprises a bottom basket rear lower cross beam suspension mechanism (221) and a bottom basket front lower cross beam suspension mechanism (222), wherein the top of the bottom basket rear lower cross beam suspension mechanism (221) and the top of the bottom basket front lower cross beam suspension mechanism (222) are respectively connected to the cross link (12) and the front upper cross beam (13), and the bottom of the bottom basket rear lower cross beam suspension mechanism (221) and the bottom of the bottom basket front lower cross beam suspension mechanism (222) are respectively connected to the bottom cross link (12) and the front upper cross beam (13). The bottom basket rear lower cross beam at the bottom of the mold is connected to the bottom basket front lower cross beam at the bottom of the bottom mold; the template anchoring mechanism (32) comprises a side template anchoring mechanism (321), an outer template anchoring mechanism (322) and an inner template anchoring mechanism (323); the side template anchoring mechanism (321) comprises a side template anchoring structure and a side template sliding beam load-bearing hanger; the side template anchoring structure passes downward through the cast beam section and is connected to the side template sliding beam load-bearing hanger below the cast beam section; the outer template anchoring mechanism (322) is arranged at the middle of the front end of the cast beam section; the outer template anchoring mechanism (322) passes downward through the cast beam section and is connected to the bottom basket rear lower cross beam at the bottom of the bottom mold below the cast beam section; the inner template anchoring mechanism (323) comprises an inner template anchoring structure and an inner template sliding beam load-bearing hanger; the inner template anchoring structure passes downward through the cast beam section and is connected to the inner template sliding beam load-bearing hanger below the cast beam section.

Images