CN112064519B - Long platform guy cable hanging basket and main beam segment construction method - Google Patents
Long platform guy cable hanging basket and main beam segment construction method Download PDFInfo
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- CN112064519B CN112064519B CN202010888770.XA CN202010888770A CN112064519B CN 112064519 B CN112064519 B CN 112064519B CN 202010888770 A CN202010888770 A CN 202010888770A CN 112064519 B CN112064519 B CN 112064519B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/04—Cable-stayed bridges
Abstract
The invention relates to the technical field of bridge construction equipment, in particular to a long platform guy cable hanging basket and a girder segment construction method. The method comprises the following steps: extending the bearing end of the bearing mechanism out of the poured concrete segment to a set position and anchoring; hoisting the prefabricated anchor block to a preset position above the bearing end, connecting the prefabricated anchor block with the bearing end by using an anchoring part, and arranging a shear-resistant mechanism between the poured concrete segment and the prefabricated anchor block; and installing the stay cable to the cable guide pipe, tensioning, and pouring concrete between the poured concrete segment and the prefabricated anchor block to finish the pouring of the girder segment. The problem of adopt the guy cable pole to link to each other the suspension cable with guy cable hanging basket arc head, after girder concrete placement and stretch-draw prestressing force, need demolish the guy cable pole, need convert the guy cable power to the concrete girder by the arc head, in the "system conversion" process, can appear very big instantaneous cable power, very easily to the structure damage is solved, can reduce the guy cable number of times, improve the construction efficiency.
Description
Technical Field
The invention relates to the technical field of bridge construction equipment, in particular to a long platform guy cable hanging basket and a girder segment construction method.
Background
When the prestressed concrete cable-stayed bridge girder cantilever is cast, if the beam body size and the concrete volume of a standard internode are large, the construction device of the guyed cradle is generally adopted. At present, a common guy rope hanging basket structure generally comprises a bearing platform, a guy rope anchoring system, a hanging lifting traveling system, a shearing resisting system and other basic systems.
A common guyed cradle adopts an arc-shaped head structure at the front end of a cradle bearing platform in order to adapt to the change of the longitudinal and transverse angles of a stay cable surface. The structural design solves the problem of angle universality of the stay cable, but the change range of the stay cable force is large, the minimum cable force value is different from the maximum cable force value by a plurality of times, so that the arc-shaped head structure must follow the principle of 'just big or not just small' in the design process, and the arc-shaped head structure is not economical. Meanwhile, the contact surface range of the anchoring point of the stay cable on the arc head is limited, so that the arc head has the problem of stress concentration, the situation of insufficient safety reserve of a local structure easily occurs, and the safety risk exists.
And the stay cable is connected with the arc-shaped head of the stay cable hanging basket by adopting a stay cable rod to form a front supporting point of the stay cable hanging basket, after the concrete pouring of the main beam is finished and the prestress is tensioned, the stay cable rod needs to be removed, and the cable force of the stay cable is converted to the concrete main beam from the arc-shaped head. The process is complicated, and in the system conversion process, instantaneous and extremely large cable force is inevitably generated, so that the structure is extremely easy to damage.
In order to ensure the elevation and the line shape uniformity of the main beam, the cable force of the stay cable needs to be adjusted once when concrete is poured to a half, and then the concrete is continuously poured.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a long platform stay cable hanging basket and a main beam segment construction method, and solves the problems that in the prior art, stay cables are connected with an arc-shaped head of the stay cable hanging basket by using a stay cable rod, the stay cable rod needs to be removed after main beam concrete pouring and tensioning prestress, the stay cable force needs to be converted from the arc-shaped head to a concrete main beam, and the structure is extremely damaged due to extremely large instantaneous cable force in the 'system conversion' process.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
in one aspect, the invention provides a long platform guyed pannier, comprising:
the bearing mechanism comprises a bearing end, the bearing mechanism is arranged below the poured concrete segment, and the bearing end can extend out of the poured concrete segment;
a padlock mechanism, comprising:
-at least one prefabricated anchor block arranged above the end of the load bearing end and provided with cable guides for mounting stay cables;
-an anchor connecting the pre-cast anchor block and a load bearing end;
and two ends of the shear-resistant mechanism matched with the prefabricated anchor block are propped against the poured concrete segment and the prefabricated anchor block.
On the basis of the technical scheme, the concrete pouring device further comprises a running mechanism, wherein the running mechanism is used for enabling the bearing end of the bearing mechanism to extend out of the lower portion of the poured concrete segment.
On the basis of the technical scheme, the walking mechanism comprises:
the two slideways are respectively arranged on two sides above the erected concrete segments;
each C-shaped hook comprises a sliding end and a connecting end, the connecting end is connected with the middle part of the bearing mechanism, and the sliding end is slidably arranged on the corresponding slide way;
and the pushing piece is used for pushing the C-shaped hook to slide on the slide way so that the bearing end extends out of the poured concrete section.
On the basis of the above technical scheme, the load bearing mechanism includes:
two spaced load-bearing trusses extending along the length of the poured concrete segment;
the connecting trusses are arranged between the two bearing trusses at intervals, and two ends of the connecting trusses are respectively connected with the two bearing trusses;
and the two pairs of truss brackets are respectively arranged on the outer sides of the bearing trusses, and the connecting end of the C-shaped hook is connected with the truss brackets.
On the basis of the technical scheme, the method further comprises the following steps: and the hanging mechanism is used for connecting one end of the hanging mechanism with the bearing mechanism, the other end of the hanging mechanism extends out of the poured concrete segment, and the height of the bearing mechanism can be adjusted.
On the basis of the technical scheme, the hanging mechanism comprises two groups of hanging units which are respectively arranged on two sides of the poured concrete segment, and each group of hanging units comprises:
one end of the anchoring hanger is connected with the bearing mechanism, and the other end of the anchoring hanger penetrates through the poured concrete segment;
the jacking piece is arranged at one end of the anchoring hanger penetrating through the plurality of anchoring hangers, and can jack or lower the anchoring hanger to adjust the height of the bearing mechanism.
On the basis of the above technical solution, the shear mechanism includes:
the suspension ejector rod is arranged between the poured concrete segment and the prefabricated anchor block;
and the two length-adjustable adjusting devices are respectively arranged at two ends of the suspension ejector rod and respectively abut against the poured concrete segment and the prefabricated anchor block.
On the basis of the technical scheme, when the number of the prefabricated anchor blocks is two, the prefabricated anchor blocks are arranged in the middle of the poured concrete segment in the transverse direction, and when the number of the prefabricated anchor blocks is two, the two prefabricated anchor blocks are respectively arranged below the flange plates on two sides of the poured concrete segment.
In another aspect, a method of constructing a main girder segment includes the steps of:
extending the bearing end of the bearing mechanism out of the poured concrete segment to a set position and anchoring;
hoisting a prefabricated anchor block to a preset position above a bearing end, connecting the prefabricated anchor block with the bearing end by using an anchoring part, and arranging a shear-resistant mechanism between the poured concrete segment and the prefabricated anchor block;
and installing the stay cable to the cable guide pipe, tensioning, and pouring concrete between the poured concrete segment and the prefabricated anchor block to finish the pouring of the girder segment.
On the basis of the technical scheme, the method for extending the bearing end of the bearing mechanism out of the poured concrete segment to a set position and anchoring comprises the following steps:
extending the bearing end of the bearing mechanism from the lower part of the poured concrete segment to a set position by utilizing a walking mechanism;
connecting the load bearing mechanism with the end of the poured concrete segment through a hanging mechanism;
and the walking mechanism is disassembled after the height of the bearing mechanism is adjusted by using the hanging mechanism.
Compared with the prior art, the invention has the advantages that: when the long platform guy cable hanging basket is used, firstly, the bearing end of the bearing mechanism extends out of the poured concrete segment to a set position and is anchored; then hoisting the prefabricated anchor block to a preset position above the bearing end, connecting the prefabricated anchor block with the bearing end by using an anchoring part, and arranging a shear-resistant mechanism between the poured concrete segment and the prefabricated anchor block; and installing the stay cable to the cable guide pipe, tensioning to form a front supporting point of the hanging basket, and pouring the next concrete segment between the poured concrete segment and the prefabricated anchor block. The prefabricated anchor block and the cable guide pipe are integrally processed in a factory, compared with the existing full cast-in-place construction concept of the guy cable hanging basket, a force transmission guy cable rod between an arc-shaped head of the traditional guy cable hanging basket and a stay cable is omitted, so that the prefabricated guy cable anchoring system has the characteristics of simple and clear structural stress, the problem of system conversion of the stay cable force is avoided after the construction is finished, the construction process is simplified, and meanwhile, because the prefabricated guy cable anchoring system of the invention installs the stay cable and adjusts the cable after the prefabricated guy cable anchoring system is installed, the cable force for the first tensioning of the stay cable is larger than the first tensioning force value of the stay cable of the existing guy cable hanging basket, the prefabricated guy cable anchoring system of the invention meets the requirements on the main beam elevation and the linear shape even if the first tensioning force of the stay cable is not adjusted in the concrete pouring process, and the construction control of the main beam is greatly reduced, the construction efficiency is improved, the 'zero' damage to the girder body is realized, the construction process is optimized, and the operation is simple.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a process state diagram of step S1 of a method of constructing a girder segment according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1 in an embodiment of the present invention;
FIG. 3 is a state diagram of step S2 of the method for constructing the main beam segments according to the embodiment of the present invention;
FIG. 4 is a cross-sectional view of the padlock mechanism of FIG. 3 in an embodiment of the present invention;
FIG. 5 is a front view of the connection of the load bearing mechanism and the hanger mechanism in an embodiment of the present invention;
FIG. 6 is a cross-sectional view of the connection of the load bearing mechanism and the hanger mechanism in an embodiment of the present invention;
FIG. 7 is a schematic view of the padlock mechanism according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a shear mechanism according to an embodiment of the present invention.
In the figure: 1. a load bearing mechanism; 11. a load-bearing truss; 12. connecting a truss; 13. truss corbels; 2. a concrete segment has been cast; 3. a padlock mechanism; 31. prefabricating an anchor block; 311. a cable guide tube; 32. an anchoring member; 4. a shear mechanism; 41. suspending a top rod; 42. an adjustment device; 5. a stay cable; 6. a running mechanism; 61. a slideway; 62. c-shaped hooks; 7. a hanging mechanism; 71. anchoring and hanging; 72. and (4) a jacking piece.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 3, 4 and 7, the present invention provides a long platform lanyard basket comprising: the bearing mechanism 1 comprises a bearing end, the bearing mechanism 1 is arranged below the poured concrete segment 2, and the bearing end can extend out of the poured concrete segment 2; also included is a padlock mechanism 3, which includes: at least one prefabricated anchor block 31 arranged above the end part of the bearing end, and a cable guide pipe 311 for installing a stay cable 5 is arranged in the prefabricated anchor block 31; the padlock mechanism 3 further comprises an anchoring member 32 connecting the prefabricated anchor block 31 and the bearing end; the guyed cradle further comprises a shear mechanism 4 matched with the prefabricated anchor block 31, wherein the shear mechanism 4 is abutted against the poured concrete segment 2 and the prefabricated anchor block 31 and is used for bearing horizontal component force of the prefabricated anchor block 31 after the stay cable 5 is installed.
When the long platform guy cable hanging basket is used, firstly, the bearing end of the bearing mechanism 1 extends out of the poured concrete segment 2 to a set position and is anchored; then hoisting the prefabricated anchor block 31 to a preset position above the bearing end, connecting the prefabricated anchor block 31 with the bearing end by using an anchoring part 32, and arranging a shear mechanism 4 between the poured concrete segment 2 and the prefabricated anchor block 31; and installing the stay cable 5 to the cable guide pipe 311, tensioning to form a front supporting point of the hanging basket, and pouring the next concrete segment between the poured concrete segment 2 and the prefabricated anchor block 31. The prefabricated anchor block 31 and the cable guide pipe 311 are integrally processed in a factory, compared with the existing full cast-in-place construction concept of the guy cable hanging basket, the prefabricated guy cable anchoring system adopts the factory prefabricated construction concept, provides a better operation environment, is more beneficial to construction quality control, can repeatedly use one set of external positioning support to fix the cable channel pipe in the factory, and compared with the existing guy cable hanging basket which needs to use an internal positioning support (the external positioning support cannot be repeatedly used when being poured in concrete), the prefabricated anchor block and the cable guide pipe 311 can repeatedly and circularly utilize the positioning support, thereby greatly saving the construction cost. Because the force transmission guy cable rod between the arc head of the traditional guy cable hanging basket and the stay cable is saved, the invention has the characteristics of simple and clear structure stress, and after the construction is finished, the problem of 'system conversion' of the stay cable force does not exist, the construction process is simplified, meanwhile, as the prefabricated guy cable anchoring system of the invention is provided with the inclined guy cable and the cable adjustment after the prefabricated guy cable anchoring system is arranged, therefore, the cable force value of the stay cable for the first time of tensioning the stay cable is larger than that of the stay cable for the first time of tensioning the stay cable of the existing stay cable hanging basket, therefore, the prefabricated guy cable anchoring system of the invention can meet the requirements of the main beam elevation and the line shape even if the first tension cable force of the stay cable is not adjusted in the concrete pouring process, from this, very big reduction prestressed concrete cable-stay bridge girder construction control degree of difficulty, improved the efficiency of construction, reduced constructor's work load. The method has the advantages of achieving zero damage to the girder body, optimizing the construction process, being simple in operation and wide in application range, being applicable to concrete main girder cable-stayed bridges and steel-concrete composite beam structure cable-stayed bridges, reducing a large number of field operation links, reducing a large number of high-altitude operations of constructors, saving manpower and material resources, saving cost and improving construction efficiency.
In this embodiment, the precast anchor block 31 has reserved the concrete girder steel bar connection interface in the precast production process, and the steel bar connection interface that precast anchor block 31 reserved, its quantity, specification all regard design drawing and specification requirement as the standard, and the connected mode of reinforcing bar is welding or muffjoint generally. The specification and size of the prefabricated anchor block 31 are determined by the lifting capacity of the bridge crane and the bearing capacity of the flat-string type bearing mechanism 1. The prefabricated anchor block 31 is also reserved with a vertical mounting hole of the anchoring part 32 in the prefabrication production process, the mounting hole does not interfere with common steel bars and prestressed steel bars, and after the full-bridge construction is completed, the sealing treatment is carried out. The cable guide tube 311 is positioned by using an external positioning bracket, the external positioning bracket has a contour size slightly larger than the prefabricated anchor block 31 and is not related to the prefabricated anchor block 31. Anchor 32 is typically a large diameter pre-stressed finish-rolled rebar.
In some alternative embodiments, as shown in figures 1 and 2, the long platform cable suspension basket further comprises running means 6 for extending the load bearing end of the load bearing means 1 from beneath the poured concrete section 2.
Preferably, the running gear 6 comprises: two slideways 61 which are respectively arranged on two sides above the erected cast concrete segment 2; the device also comprises two C-shaped hooks 62, wherein each C-shaped hook 62 comprises a sliding end and a connecting end, the connecting end is connected with the middle part of the bearing mechanism 1, and the sliding end is slidably arranged on the corresponding slide way 61; and a pushing piece for pushing the C-shaped hook 62 to slide on the slideway 61 so that the bearing end extends out of the poured concrete segment 2.
In this embodiment, the sliding ends and the connecting ends are at right angles, the sliding ends are arranged at two sides above the erected cast concrete segment 2, and the connecting ends are connected with the middle part of the bearing mechanism 1. In the initial position, the bearing end of the bearing mechanism 1 is also positioned below the poured concrete segment 2, and after the C-shaped hook 62 is connected with the bearing mechanism 1, the C-shaped hook 62 is pushed by the pushing piece to slide on the slideway 61, so that the bearing end extends out of the poured concrete segment 2. Of course, in other embodiments, other types of running gear 6 may be selected, and the same effect can be achieved by mounting the load-bearing mechanism 1 and extending the load-bearing part of the load-bearing mechanism 1 out of the cast concrete segment 2.
As shown in fig. 5 and 6, in some alternative embodiments, the load bearing mechanism 1 comprises: two spaced load-bearing girders 11 extending in the longitudinal direction of the cast concrete segment 2; the device also comprises a plurality of connecting trusses 12 arranged at intervals, wherein the connecting trusses are arranged between the two bearing trusses 11, and two ends of the connecting trusses are respectively connected with the two bearing trusses 11; the truss structure is characterized by further comprising two pairs of truss brackets 13 which are respectively arranged on the outer sides of the two bearing trusses 11, and the connecting end of the C-shaped hook 62 is connected with the truss brackets 13.
In this embodiment, a plurality of connecting trusses 12 are disposed between two spaced bearing trusses 11 and detachably connected to each other, so that the strength of the whole bearing mechanism 1 can be enhanced, and two pairs of truss brackets 13 are disposed outside the two bearing trusses 11 to facilitate the installation and the matching of the C-shaped hooks 62. The upper chord and the lower chord of the bearing truss 11 are reserved with the installation and connection interfaces of the hanging mechanism 7, and the interface structure is reinforced by adopting stiffening plates. Of course, other forms of the support element 1 can be selected in other embodiments, and the same effect can be achieved.
As shown in fig. 5 and 6, in some alternative embodiments, the long platform lanyard basket further comprises: and the hanging mechanism 7 is used for connecting one end of the hanging mechanism with the end part of the poured concrete segment 2 and the other end of the hanging mechanism with the bearing mechanism 1 of which the bearing end extends out of the poured concrete segment 2, and can adjust the height of the bearing mechanism 1.
Preferably, hang mechanism 7 includes that two sets of hanging units of locating 2 both sides of concreted concrete segment respectively, and every group hangs the unit and includes: an anchoring hanger 71, one end of which is connected with the bearing mechanism 1 and the other end of which passes through the poured concrete segment 2; the lifting piece 72 is arranged at one end of the anchoring hanger 71 penetrating through a plurality of anchoring hangers 71 and can lift or lower the anchoring hanger 71 to adjust the height of the bearing mechanism 1.
In this embodiment, the anchoring hanger 71 is located at the middle rear part of the load bearing mechanism 1, the jacking piece 72 is arranged on the top surface of the concrete main beam, in this embodiment, the jacking piece 72 is a through jack, and the truss corbels 13 are located at two sides of the load bearing mechanism 1. When the prestressed concrete cable-stayed bridge girder cantilever casting construction is carried out by using the invention, the bearing mechanism 1 is lifted by the jacking piece 72 until the bearing mechanism is tightly attached to the cast concrete segment 2, then the rear anchoring hanger 71 is locked, at the moment, the weight of the bearing mechanism 1 is transferred to the cast concrete segment 2 from the rear anchoring hanger 71, the construction of subsequent procedures is started to be prepared, and the stay cable is not directly connected with the bearing mechanism 1. Therefore, compared with the design that the bearing mechanism 1 of the existing guyed cradle is directly connected with the stay cable, the bearing mechanism 1 of the invention adopts the design without an arc-shaped head and is not directly connected with the stay cable, thereby avoiding the problem of concentrated stress of the arc-shaped head and improving the structural safety.
As shown in fig. 8, in some alternative embodiments, the shear mechanism 4 includes: the device also comprises a suspension ejector rod 41 which is arranged between the poured concrete segment 2 and the prefabricated anchor block 31; and the two length-adjustable adjusting devices 42 are respectively arranged at two ends of the suspension ejector rod 41 and respectively abut against the poured concrete segment 2 and the prefabricated anchor block 31.
In this embodiment, the suspension rods 41 are made of steel or concrete, and have high axial bearing capacity, and the specific specification thereof needs to be designed and selected according to the maximum axial force in the construction process. For the padlock mechanism 3 of the external concrete girder (the padlock mechanism 3 is positioned on the outer side of the concrete girder structure), the suspension ejector rods 41 are of a single through long structure, for the padlock mechanism 3 of the internal concrete girder (the padlock mechanism 3 is positioned inside the concrete girder structure), structures such as transverse partition walls exist among guy cable anchoring systems, and the number and the section length of the suspension ejector rods 41 are divided according to the positions and the number of the transverse partition walls.
One end of the adjusting device 42 is connected with the suspension mandril 41, the other end is supported on the prefabricated anchor block 31, and the contact surfaces are all transited by semi-rigid hard plastic. The adjustment device 42 has a three-way position adjustment function, and generally employs a three-way jack apparatus.
In some alternative embodiments, when the prefabricated anchor block 31 is one, it is disposed at the middle of the lateral direction of the poured concrete segment 2, and when the prefabricated anchor block 31 is two, the two prefabricated anchor blocks 31 are disposed below the flange plates at both sides of the poured concrete segment 2, respectively.
Referring again to fig. 1 and 7, the present invention also provides a method for constructing a main girder segment, including the steps of:
s1: and (3) extending the bearing end of the bearing mechanism 1 out of the poured concrete segment 2 to a set position and anchoring.
S11: extending the bearing end of the bearing mechanism 1 from the lower part of the poured concrete segment 2 to a set position by utilizing the traveling mechanism 6;
s12: the bearing mechanism 1 is connected with the end part of the poured concrete segment 2 through a hanging mechanism 7;
s13: the walking mechanism 6 is dismantled after the height of the bearing mechanism 1 is adjusted by the hanging mechanism 7.
S2: and hoisting the prefabricated anchor block 31 to a preset position above the bearing end, connecting the prefabricated anchor block 31 with the bearing end by using an anchoring part 32, and arranging a shear mechanism 4 between the poured concrete segment 2 and the prefabricated anchor block 31.
Specifically, the small hoisting tool is used for hoisting the anchoring part 32, the prefabricated padlock mechanism 3 is firmly connected with the bearing mechanism 1 through a mounting hole reserved on the prefabricated anchor block 31, a certain pre-tightening force is applied to the anchoring part 32, and the padlock mechanism 3 and the bearing mechanism 1 are firmly locked. After the suspension ejector rod 41 and the adjusting device 42 are installed, the adjusting device 42 is tightly embedded with a copy pad of a contact surface of the padlock mechanism 3, full-section contact is guaranteed, then the adjusting device 42 is started, the position of the suspension ejector rod 41 is guaranteed to meet design requirements, finally, pre-jacking force is applied to the suspension ejector rod 41 to serve as safety reserve, the pre-jacking force is determined through calculation analysis simulation, and construction displacement of the padlock mechanism 3 for reserving a concrete girder to be poured is considered.
S3: and starting the stay cable 5 to install traction equipment, installing the stay cable 5 to the cable guide pipe 311, tensioning to form a front supporting point of the long platform stay cable hanging basket without the arc head, and pouring concrete between the poured concrete segment 2 and the prefabricated anchor block 31 to finish the pouring of the main beam segment.
The stay cable hanging basket bearing system disclosed by the invention adopts a design without an arc-shaped head, and is not required to be directly connected with a stay cable, so that the problem of stress concentration of the arc-shaped head is avoided, and the structural safety is improved. The prefabricated guy cable anchoring system comprises a prefabricated anchor block, a cable guide pipe and a vertical anchoring device. The prefabricated anchor block and the cable guide pipe are integrally processed in a factory, compared with the existing full cast-in-place construction concept of the guy cable hanging basket, the prefabricated guy cable anchoring system adopts the factory prefabricated construction concept, provides a better operation environment, is more beneficial to construction quality control, can repeatedly use one set of external positioning bracket to fix the cable channel pipe in the factory, and compared with the existing guy cable hanging basket which needs to use an internal positioning bracket (the prefabricated anchor block and the cable guide pipe are poured in concrete and cannot be repeatedly used), the prefabricated anchor block and the cable guide pipe can repeatedly and cyclically utilize the positioning bracket, so that the construction cost is greatly saved.
Compared with the guy cable anchoring system of the existing guy cable hanging basket, the invention has the characteristics of simple and definite structural stress due to the fact that a force transmission guy cable rod between the arc-shaped head of the traditional guy cable hanging basket and a stay cable is omitted, the problem of system conversion of the stay cable force is avoided after construction is completed, the construction process is simplified, and meanwhile, the prefabricated guy cable anchoring system of the invention installs the stay cable and adjusts the cable after the prefabricated guy cable anchoring system is installed, so the cable force of the stay cable which is firstly stretched is larger than the cable force of the stay cable of the existing guy cable hanging basket, and the prefabricated guy cable anchoring system of the invention meets the requirements on the elevation and the line shape of the main beam even if the first stretching cable force of the stay cable is not adjusted in the concrete pouring process, thereby greatly reducing the construction control difficulty of the prestressed concrete stayed bridge and improving the construction efficiency, the workload of constructors is reduced.
The shear mechanism comprises a suspension ejector rod and an adjusting device. Compared with the prefabricated guy cable anchoring systems, the suspension ejector rod and the adjusting device are arranged between the prefabricated guy cable anchoring systems, and for the external main beam stay cable anchoring systems, structures such as transverse walls and the like are not arranged between the main beam stay cable anchoring systems generally. Therefore, under various main beam structural forms, the suspension type shear resisting system is not directly contacted with the beam body, and compared with the existing guy cable hanging basket that the shear resisting piece is arranged on the beam body through the opening to transmit ineffective horizontal force, the prefabricated guy cable anchoring system is used for transmitting force, the beam body structure cannot be damaged, the beam body section cannot be weakened, and the beam body structure safety is ensured.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A long platform guy cable hanging basket, comprising:
the bearing mechanism (1) comprises a bearing end, the bearing mechanism (1) is arranged below the poured concrete segment (2), and the bearing end can extend out of the poured concrete segment (2);
a padlock mechanism (3) comprising:
-at least one prefabricated anchor block (31) arranged above the end of the load bearing end, and in which prefabricated anchor block (31) cable ducts (311) for installing stay cables (5) are provided;
-an anchor (32) connecting the pre-cast anchor block (31) and a load bearing end;
and the two ends of the shear mechanism (4) matched with the prefabricated anchor block (31) are propped against the poured concrete segment (2) and the prefabricated anchor block (31).
2. The long platform lanyard basket of claim 1 wherein: the concrete pouring device also comprises a running mechanism (6) which is used for extending the bearing end of the bearing mechanism (1) out of the lower part of the poured concrete segment (2).
3. The long platform lanyard basket of claim 2 wherein: the running gear (6) comprises:
two slideways (61) which are respectively arranged on two sides above the erected cast concrete segment (2);
each C-shaped hook (62) comprises a sliding end and a connecting end, the connecting end is connected with the middle part of the bearing mechanism (1), and the sliding end is slidably arranged on the corresponding slide way (61);
-an ejector for ejecting the sliding of the C-shaped hook (62) on the slideway (61) to extend the load-bearing end out of the cast concrete section (2).
4. A long platform guy wire basket according to claim 3, characterized in that the load bearing mechanism (1) comprises:
two spaced apart load-bearing girders (11) extending in the longitudinal direction of the cast concrete section (2);
the connecting trusses (12) are arranged at intervals and arranged between the two bearing trusses (11), and two ends of the connecting trusses are respectively connected with the two bearing trusses (11);
two pairs of truss brackets (13) are respectively arranged on the outer sides of the bearing trusses (11), and the connecting ends of the C-shaped hooks (62) are connected with the truss brackets (13).
5. The long platform lanyard basket of claim 1 further comprising: and the hanging mechanism (7) is used for connecting one end of the hanging mechanism with the end part of the poured concrete segment (2) and the other end of the hanging mechanism with the bearing mechanism (1) of which the bearing end extends out of the poured concrete segment (2), and can adjust the height of the bearing mechanism (1).
6. A long platform guy rope hanging basket according to claim 5, characterized in that the hanging means (7) comprises two sets of hanging units respectively arranged on both sides of the poured concrete segment (2), each set of hanging units comprising:
an anchoring hanger (71) having one end connected to the load bearing means (1) and the other end passing through the cast concrete segment (2);
the jacking piece (72) is arranged at one end of the anchoring hanger (71) penetrating through a plurality of anchoring hangers (71), and can jack or lower the anchoring hanger (71) so as to adjust the height of the bearing mechanism (1).
7. A long platform guy wire basket according to claim 1, characterized in that the shear mechanism (4) comprises:
-a suspension ram (41) provided between the cast concrete segment (2) and the pre-cast anchor block (31);
and the two length-adjustable adjusting devices (42) are respectively arranged at two ends of the suspension ejector rod (41) and respectively abut against the poured concrete segment (2) and the prefabricated anchor block (31).
8. A long platform guy wire basket according to claim 1, characterized in that when the number of the prefabricated anchor blocks (31) is one, it is located at the middle of the lateral direction of the cast concrete segment (2), and when the number of the prefabricated anchor blocks (31) is two, two of the prefabricated anchor blocks (31) are respectively located below the flange plates at both sides of the cast concrete segment (2).
9. The construction method of the girder section of the long platform guy cable hanging basket is characterized by comprising the following steps of:
extending the bearing end of the bearing mechanism (1) out of the poured concrete segment (2) to a set position and anchoring;
hoisting a prefabricated anchor block (31) to a preset position above a bearing end, connecting the prefabricated anchor block (31) with the bearing end by using an anchoring part (32), and arranging a shear mechanism (4) between the poured concrete segment (2) and the prefabricated anchor block (31);
and installing the stay cable (5) to the cable guide pipe (311) and tensioning, and pouring concrete between the poured concrete segment (2) and the prefabricated anchor block (31) to finish the pouring of the main beam segment.
10. A method of constructing a main beam section according to claim 9, wherein said extending and anchoring the load bearing end of said load bearing means (1) out of said poured concrete section (2) to a set position comprises the steps of:
extending the bearing end of the bearing mechanism (1) from the lower part of the poured concrete segment (2) to a set position by utilizing a walking mechanism (6);
connecting the load-bearing means (1) to the ends of the cast concrete segments (2) by means of a suspension means (7);
and (3) adjusting the height of the bearing mechanism (1) by using a hanging mechanism (7) and then detaching the walking mechanism (6).
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010888770.XA CN112064519B (en) | 2020-08-28 | 2020-08-28 | Long platform guy cable hanging basket and main beam segment construction method |
| MA56738A MA56738B1 (en) | 2020-08-28 | 2020-10-27 | CONSTRUCTION METHOD FOR LONG PLATFORM GUYED SUSPENDED BASKET AND MAIN BEAM SECTION |
| PCT/CN2020/123973 WO2022041449A1 (en) | 2020-08-28 | 2020-10-27 | Construction method for long platform guy-wire hanging basket and main girder section |
| LU501962A LU501962B1 (en) | 2020-08-28 | 2020-10-27 | Long Platform Guy-Wire Hanging Basket and Construction Method For Main Girder Section |
| GB2214658.3A GB2608555A (en) | 2020-08-28 | 2020-10-27 | Long platform guy-wire hanging basket and construction method for main girder section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010888770.XA CN112064519B (en) | 2020-08-28 | 2020-08-28 | Long platform guy cable hanging basket and main beam segment construction method |
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| Publication Number | Publication Date |
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| CN112064519A CN112064519A (en) | 2020-12-11 |
| CN112064519B true CN112064519B (en) | 2021-09-14 |
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| CN202010888770.XA Active CN112064519B (en) | 2020-08-28 | 2020-08-28 | Long platform guy cable hanging basket and main beam segment construction method |
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|---|---|
| CN (1) | CN112064519B (en) |
| GB (1) | GB2608555A (en) |
| LU (1) | LU501962B1 (en) |
| MA (1) | MA56738B1 (en) |
| WO (1) | WO2022041449A1 (en) |
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| CN112709140B (en) * | 2020-12-23 | 2022-08-05 | 中铁广州工程局集团有限公司 | Construction method of concrete box girder of half-through type basket concrete filled steel tube arch bridge |
| CN114737489B (en) * | 2022-03-31 | 2023-04-28 | 中铁第五勘察设计院集团有限公司 | Construction method of self-propelled cantilever bridge fabrication machine |
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- 2020-10-27 LU LU501962A patent/LU501962B1/en active IP Right Grant
- 2020-10-27 MA MA56738A patent/MA56738B1/en unknown
- 2020-10-27 GB GB2214658.3A patent/GB2608555A/en active Pending
- 2020-10-27 WO PCT/CN2020/123973 patent/WO2022041449A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| LU501962B1 (en) | 2022-05-10 |
| WO2022041449A8 (en) | 2022-05-27 |
| GB202214658D0 (en) | 2022-11-23 |
| WO2022041449A1 (en) | 2022-03-03 |
| MA56738A1 (en) | 2023-07-31 |
| GB2608555A (en) | 2023-01-04 |
| CN112064519A (en) | 2020-12-11 |
| MA56738B1 (en) | 2023-12-29 |
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