CN113818618B - Unbalance force resistant crossing type multi-node steel cable node structure and construction method - Google Patents
Unbalance force resistant crossing type multi-node steel cable node structure and construction method Download PDFInfo
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- CN113818618B CN113818618B CN202111389628.1A CN202111389628A CN113818618B CN 113818618 B CN113818618 B CN 113818618B CN 202111389628 A CN202111389628 A CN 202111389628A CN 113818618 B CN113818618 B CN 113818618B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/14—Suspended roofs
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5825—Connections for building structures in general of bar-shaped building elements with a closed cross-section
- E04B1/5837—Connections for building structures in general of bar-shaped building elements with a closed cross-section of substantially circular form
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- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2406—Connection nodes
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- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B2001/2466—Details of the elongated load-supporting parts
- E04B2001/2472—Elongated load-supporting part formed from a number of parallel profiles
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B2001/5875—Connections for building structures in general of bar-shaped building elements using exterior clamping plates or shells
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Abstract
The invention discloses an unbalanced force resistant crossing multi-node steel cable node structure and a construction method, and the structure comprises a boundary cable, a stabilizing cable, a bearing cable, an anti-sliding cable and a steel cable clamp, wherein the steel cable clamp is arranged on the boundary cables which are arranged in parallel at intervals, the stabilizing cable is connected to the steel cable clamp which is positioned at the outermost side and is arranged in parallel with the boundary cable, the bearing cable is connected to the steel cable clamp and is vertically arranged with the boundary cable, the anti-sliding cable is connected with the steel cable clamp and connects the steel cable clamps which are arranged at intervals in the middle together, and the anti-sliding cable is arranged in parallel with the boundary cable; the ends of the anti-slip cables are connected to the outermost wire rope clamps. The anti-slip cable is arranged locally to resist the unbalanced force of the area with the excessive unbalanced force in the cable net structure, so that the adverse effect of the unbalanced force between the cable nets on the whole structure is effectively reduced, the safety range of the whole cable net is increased, the cable net processing and manufacturing cost is reduced, the construction difficulty is reduced, and the construction cost is reduced.
Description
Technical Field
The invention relates to the technical field of cable net structures, in particular to an unbalanced force resistant crossing type multi-node steel cable node structure and a construction method.
Background
The cable structure is one of large-span prestressed steel structure systems, and is a full-tension system with extremely high structural efficiency. The rigidity of the cable structure is provided by the prestress of the tension units, the system has almost no rigidity before the prestress is applied, and the magnitude of the prestress applied to the stay cable plays a determining role in the appearance and the structural rigidity of the whole cable structure system.
The cable structure has different and unique shapes, but a plurality of creative structural designs bring a plurality of problems to the node design of the steel cable. The steel cable nodes are the connecting hubs of the cable net, and the reasonability and the safety of the structure directly influence the service performance of the whole cable net.
During the design of the cable structure, unbalanced forces are inevitably generated between the individual cable segments due to the construction of the structure itself. The unbalanced force is further amplified by the influence of various factors such as the machining precision error of the steel cable, the position error of a mark point on the steel cable, the installation position error of a cable clamp, the combined action of a plurality of steel cables, the machining and installation errors of the steel structure anchoring point and the like in the construction process, and the adverse effect is generated on the whole cable net system.
Currently, unbalanced forces between cable segments are resisted mainly by three ways: first, the cable clamp is used to clamp the cable, and the unbalanced force is resisted by the anti-sliding force generated by the cable clamp clamping the cable. And secondly, the unbalanced force is resisted by the tensile force of the steel cable and the tensile property of the cable connecting node in a mode of breaking the steel cable and arranging the cable connecting node. And thirdly, adopting a mode of adding anti-sliding cables between each cable section, and resisting the unbalanced force through the anti-sliding cables of each section.
The first mode is mainly applied to connection between the cable sections with small unbalanced force, the danger coefficient of the first mode is increased along with the increase of the unbalanced force, and the structural size of the cable clamp needs to be increased to achieve the effect, so that the manufacturing cost of the cable clamp is increased, the construction difficulty is increased, and the construction cost is increased.
Although the second mode can resist larger unbalanced force than the first mode, the production and manufacturing cost of the cable structure is greatly increased by the main steel cable breaking and the cable connecting node arrangement, the construction difficulty is increased, the construction cost is also increased, and the construction precision and the attractiveness are influenced to a certain extent.
The third mode and the second mode can resist larger unbalanced force, but the anti-sliding cable is added between each section of cable section, so that the production and manufacturing cost of the cable structure is increased, the construction cost is also increased, and the construction precision and the attractiveness are correspondingly influenced.
For some special structures, the steel cable node can not resist the unbalanced force of the cable net structure by itself, so that the potential safety hazard of the whole cable structure can be caused, and the design difficulty of the node can be greatly increased.
The invention provides a span-type multi-node steel cable node structure capable of resisting unbalanced force and a construction method thereof, which are used for solving the problems.
Disclosure of Invention
The invention provides an unbalanced force resistant crossing type multi-node steel cable node structure and a construction method, which are used for ensuring that a steel cable node is always in a safe state during the service period of a cable net.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a span-type multi-node steel cable node structure resisting unbalanced force is a cable net structure bearing a large unbalanced force section and comprises a boundary cable, a stabilizing cable, a bearing cable, an anti-sliding cable and steel cable clamps, wherein the steel cable clamps are arranged on the boundary cable at intervals, the steel cable clamps on the unbalanced force section comprise the steel cable clamps arranged at two ends and the steel cable clamps arranged in the middle, the steel cable clamps arranged in the middle are arranged at intervals, the stabilizing cable is connected to the steel cable clamps at the two ends, the bearing cable is connected to the steel cable clamps, and the anti-sliding cable is connected with the steel cable clamps;
the anti-slip cable comprises a cable body, anchors and connectors, wherein the cable body is arranged between the two anchors, and the connectors are arranged at the outer ends of the anchors;
the two ends of the anti-sliding cable are fixedly connected to the steel cable clamps at the two ends, and the cable body of the anti-sliding cable is movably connected to the steel cable clamp in the middle.
Further, the anchorage device comprises an adjusting anchorage device and a fixing anchorage device; the adjusting anchor comprises an anchor structure I and an adjusting screw rod, the adjusting screw rod is movably connected to the anchor structure I, and the connector is movably connected to the adjusting screw rod; the fixing anchorage device comprises an anchorage device structure II and a fixing connector, wherein the fixing connector is fixedly connected to the anchorage device structure II, and the fixing anchorage device is of an integrated structure.
Further, the steel cable clip comprises a clip body, a cableway and connecting lug plates, the cableway is arranged on the clip body at intervals, the connecting lug plates are arranged at the inner end of the clip body, the cable body of the boundary cable and the cable body of the anti-sliding cable are arranged in the cableway, and the bearing cable is connected to the connecting lug plates.
Furthermore, the clamp body is provided with a connecting hole and a connecting lug plate, the connecting hole and the connecting lug plate are respectively arranged on the inner side surface and the outer side surface of the clamp body, the adjusting screw is connected in the connecting hole, and the stabilizing cable is connected on the connecting lug plate.
Furthermore, be equipped with the connection otic placode on the clamp, the connection otic placode is established respectively on the inside and outside both sides face of clamp, the connector of anti cable that slides is connected on the connection otic placode of clamp inboard, the connection otic placode outside the clamp is connected to the stabilizing cable.
Furthermore, the cableway is arranged on the clamp body at intervals and is arranged in an up-down layered mode, and the boundary cables are arranged in an up-down layered mode and are arranged in the cableway.
Further, the anti-slip cable body is arranged on a cableway of the steel cable clamp positioned in the middle.
A construction method of an unbalanced force resistant crossing type multi-node steel cable node structure comprises the following steps:
s1, stress analysis: according to the integral structure and the connection form of the cable net, carrying out stress analysis on the cable net structure, finding out an area with overlarge unbalanced force at the cable net boundary, and carrying out structural analysis on the area;
s2, establishing a model: modeling a cable net structure in an area with excessive unbalanced force, carrying out simulation analysis according to the model and construction steps to obtain the deformation and stress of a boundary cable and an anti-sliding cable of the cable net structure in the construction process, and marking the installation position of a steel cable clamp;
s3, cable net assembly: assembling the cable net, and pre-assembling and reinforcing the cable net structure in the area with the excessive unbalanced force;
s4, cable net construction: lifting installation and stretch-draw forming of the cable net are carried out according to simulation analysis of the model;
s5, status detection: and after the cable net is tensioned and installed, detecting the working states of the anti-sliding cables and the steel cable clamps on the cable net structure in the area with the excessive unbalanced force after the cable net is stable, and finishing construction when the anti-sliding cables and the steel cable clamps are always in a safe state.
Further, in step S3, the assembling step of the cable net structure in the area with excessive unbalanced force is as follows:
s31, laying boundary cables in sequence, and installing steel cable clamps on the boundary cables;
s32, laying an anti-slip cable, installing a cable body of the anti-slip cable on a steel cable clamp positioned in the middle, and keeping the cable body in a free sliding state;
s33, connecting the end of the anti-slip cable to the steel cable clamp positioned on the outermost side, accurately adjusting the length and the installation position of the anti-slip cable, ensuring that the stress of the anti-slip cable after installation meets the design requirement, and limiting the cable body of the anti-slip cable;
and S34, assembling the stabilizing cable and the bearing cable, and connecting the stabilizing cable and the bearing cable with the steel cable clamp.
Preferably, the operation method for adjusting the anti-slip cable is as follows:
the length of the anti-slip cable is measured by using the graduated scale, and the length of the anti-slip cable is accurately controlled by adjusting the anchorage device.
The invention has the following beneficial effects:
the unbalanced force of the overlarge area of the unbalanced force in the cable net structure is resisted by the anti-sliding cables arranged locally, the design problem of the node is solved, the adverse effect of the unbalanced force between the cable nets on the whole structure is effectively reduced, the safety margin of the whole cable net is increased, the cable net processing and manufacturing cost is reduced, the construction difficulty is reduced, and the construction cost is reduced. After the cable net is formed, the anti-sliding cable is always in a working state, so that the internal force distribution of the whole cable net is more balanced, the stress rationality of the steel cable nodes at two ends of the anti-sliding cable is ensured, and the safety of the whole cable net in a service period is improved.
Drawings
FIG. 1 is a schematic view of the unbalanced force overload area structure of the cable net structure of the present invention;
FIG. 2 is a schematic view of a wire rope joint structure connection according to the present invention;
FIG. 3 is a schematic diagram of a connection structure according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a connecting structure according to an embodiment of the present invention;
FIG. 5 is a schematic illustration of the wire rope clamp connection of the present invention in an intermediate position;
FIG. 6 is a schematic structural diagram of an embodiment of the anti-slip cable of the present invention;
FIG. 7 is a schematic structural diagram of a second embodiment of the anti-slip cable of the present invention;
FIG. 8 is a schematic view of the cable clamp of the present invention in an intermediate position;
FIG. 9 is a schematic structural view of an embodiment of the cable clamp of the present invention;
FIG. 10 is a schematic structural view of a second embodiment of the cable clamp of the present invention.
Reference numerals: 1-boundary rope, 2-stabilizing rope, 3-bearing rope, 4-anti-sliding rope, 41-rope body, 42-anchor, 421-anchor structure I, 422-adjusting screw, 423-anchor structure II, 424-fixed connector, 43-connector, 5-steel rope clamp, 51-clamp body, 511-connecting hole, 52-cableway and 53-connecting lug plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the specification, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
As shown in fig. 1, 2, 3, 4, 5, an unbalanced force resistant crossing multi-node cable node structure, located in a cable net structure, suitable for a boundary segment in the cable net structure which is subjected to an unbalanced force too large to resist the unbalanced force at the node, includes a boundary cable 1, a stabilizing cable 2, a bearing cable 3, an anti-slip cable 4 and a cable clamp 5, where the cable clamps 5 are disposed at intervals on the boundary cable 1 to form nodes, the cable clamp 5 located on the unbalanced force segment includes cable clamps 5 disposed at both ends and a cable clamp 5 disposed in the middle, the cable clamp 5 disposed in the middle is disposed at intervals, the stabilizing cable 2 is connected to the cable clamps 5 at both ends, the bearing cable 3 is connected to the cable clamp 5, and the anti-slip cable 4 is connected to the cable clamp 5;
the two ends of the anti-slip cable 4 are fixedly connected to the steel cable clamps 5 at the two ends, and because the length of the cable body of the anti-slip cable 4 is unchanged, in the process of stressing the cable net, the unbalanced force at the node with larger unbalanced force is resisted by the unchanged overall length of the anti-slip cable 4; the cable body 41 of the anti-sliding cable 4 is movably connected to the middle steel cable clamp 5, the cable body 41 of the anti-sliding cable 4 is located in the steel cable clamp 5, only the movement of the cable body 41 along the direction vertical to the axis is limited, the sliding of the cable body 41 along the axis is not limited, the cable body 41 can freely slide on the middle steel cable clamp 5, and the node with small unbalanced force in the middle is not influenced.
As shown in fig. 1 and 2, in the length section of the cable net structure, which is subjected to an excessive unbalanced force, the unbalanced force is mainly generated at the nodes at the two end portions, the unbalanced force at the two end portions is large and symmetrical, the two ends of the anti-slip cable 4 are fixedly connected to the cable clips 5 at the two ends, so that the position of the anti-slip cable 4, which is vertical to the axis direction, is limited, the anti-slip cable also slides along the axis direction, the large unbalanced force at the nodes at the two ends in the section is mainly resisted, and the reasonable stress and the structural stability of the cable net structure are ensured; and the unbalanced force at the joint of the cable clamp between the two end parts is smaller, so that the cable body 41 of the anti-sliding cable 4 is movably connected to the cableway 52 of the cable clamp 5 positioned in the middle, the cable body 41 can freely slide in the cableway 52, only the position of the anti-sliding cable 4 vertical to the axial direction is limited, the free sliding of the anti-sliding cable 4 along the axial direction is not limited, and the auxiliary action is realized to resist the smaller unbalanced force in the middle position of the area.
The anti-slip cable 4 is arranged in the area with the excessive unbalanced force in the cable net structure to resist the unbalanced force, and the anti-slip cable 4 is ensured to play a role in the whole installation and use process of the cable net by means of model establishment, stress analysis and real-time monitoring, so that the balance of the force distribution in the cable net is effectively ensured, and the safety and stability of the whole cable net during use are improved.
As shown in fig. 6 and 7, the anti-slip cable 4 comprises a cable body 41, an anchorage 42 and a connector 43, wherein the cable body 41 is arranged between the two anchorages 42, and the connector 43 is arranged on the outer end of the anchorage 42.
As shown in fig. 6 and 7, further, the anchors 42 include adjustment anchors and fixation anchors; the adjusting anchor comprises an anchor structure I421 and an adjusting screw rod 422, the adjusting screw rod 422 is movably connected to the anchor structure I421, and the connector 43 is movably connected to the adjusting screw rod 422; fixed ground tackle includes anchor structure two 423 and fixed connector 424, fixed connector 424 fixed connection is on anchor structure two 423, fixed ground tackle formula structure as an organic whole.
As shown in fig. 8, 9 and 10, the cable clamp 5 further includes a clamp body 51, a cable way 52 and a connecting ear plate 53, the cable way 52 is disposed at intervals on the clamp body 51, the connecting ear plate 53 is disposed at an inner end of the clamp body 51, the cable body of the border cable 1 and the cable body 41 of the anti-sliding cable 4 are disposed in the cable way 52, and the bearing cable 3 is connected to the connecting ear plate 53.
As shown in fig. 3, 4, 5, 8, 9 and 10, the cable clamps 5 of the present invention are provided with two types, one type is provided at both ends of the area of the cable net structure which is subjected to an unbalanced force to act as cable nodes for resisting a large unbalanced force, the other type is provided at the middle at intervals to act as reinforcing and stabilizing, the structure of the cable clamps 5 provided at both ends is different from that of the cable clamp 5 provided at the middle, the cable clamps 5 provided at both ends need to be connected with the boundary cable 1, the stabilizing cable 2, the bearing cable 3 and the anti-slipping cable 4, four connection points are provided, the cable clamp 5 provided at the middle is connected with the boundary cable 1, the bearing cable 3 and the anti-slipping cable 4, and three connection points are provided.
The composition structure of the anti-sliding cable 4 is flexibly changed according to the actual situation, at least one adjusting anchorage device is connected to two ends of the cable body 41 to realize the accurate adjustment of the length of the anti-sliding cable 4, and the outer end of the adjusting anchorage device can select whether a connector 43 is arranged or not according to the actual situation.
As shown in fig. 3, 6 and 9, in the first embodiment of the present invention, the anti-slip cable 4 is composed of a cable body 41, an adjusting anchor, a fixing anchor and a connector 43, wherein two ends of the cable body 41 are respectively connected with the adjusting anchor and the fixing anchor, and the connector 43 is connected to an adjusting screw 422 of the adjusting anchor; the steel cable clamp 5 matched with the anti-sliding cable 4 consists of a clamp body 51, a cableway 52 and connecting lug plates 53, wherein the inner end part of the clamp body 51 of the steel cable clamp 5 arranged at the two ends is provided with three connecting lug plates 53, the three connecting lug plates 53 are respectively arranged on the inner side surface, the outer side surface and the outer end surface of the clamp body 51, and the three connecting lug plates 53 are respectively connected with the stabilizing cable 2, the bearing cable 3 and the anti-sliding cable 4; the centrally arranged cable clamp 5 is provided with a connecting lug 53 which is connected to the support cable 3, and the cable body 41 of the anti-sliding cable 4 is movably connected to the cable track 52 of the centrally arranged cable clamp 5.
As shown in fig. 4, 5, 7, 8 and 10, in the second embodiment of the present invention, the anti-slip cable 4 is composed of a cable body 41 and an adjusting anchorage, wherein the cable body 41 is arranged between the two adjusting anchorages; the steel cable clamp 5 matched with the anti-sliding cable 4 is composed of a clamp body 51, a cableway 52 and connecting lug plates 53, wherein the inner end parts of the clamp body 51 of the steel cable clamp 5 arranged at two ends are provided with two connecting lug plates 53, the inner side surface of the clamp body 51 is provided with a connecting hole 511, the two connecting lug plates 53 are respectively arranged on the outer side surface and the outer end surface of the clamp body 51, the two connecting lug plates 53 are respectively connected with the stabilizing cable 2 and the bearing cable 3, and an adjusting screw 422 on the anti-sliding cable 4 is connected in the connecting hole 511 on the inner side surface of the clamp body 51.
As shown in fig. 10, the clip body 51 is further provided with a connection hole 511 and a connection ear plate 53, the connection hole 511 and the connection ear plate 53 are respectively provided on the inner side and the outer side of the clip body 51, the adjustment screw 422 is connected in the connection hole 511, and the stabilization cord 2 is connected to the connection ear plate 53.
As shown in fig. 8 and 9, the clip body 51 is further provided with connecting ear plates 53, the connecting ear plates 53 are respectively arranged on the inner side surface and the outer side surface of the clip body 51, the connecting head 43 of the anti-slip cable 4 is connected to the connecting ear plate 53 on the inner side of the clip body 51, and the stabilizing cable 2 is connected to the connecting ear plate 53 on the outer side of the clip body 51.
Furthermore, the cable body 41 of the anti-slip cable 4 is movably connected to the cableway 52 of the middle steel cable clamp 5 and can freely slide along the axial direction of the cable body 41; the inner diameter of the cable path 52 of the central cable clamp 5 is greater than the diameter of the cable body 41 of the anti-slip cable 4.
Preferably, the stabilizing cable 2 and the load bearing cable 3 each comprise a cable body 41 and a connector 43, and are connected to the connection lug plate 53 of the cable clamp 5 through the connector 43.
Preferably, the cableway 52 is fixed to the clip body 51 by a cover plate and a high-strength bolt, and further, the body of the border wire 1 is fixed to the wire rope clip 5.
Furthermore, the position of the steel cable clamp 5 is set as a boundary subsection in the cable net structure which is subjected to overlarge unbalanced force, the border cable or other regional cables are used in practical application according to practical situations, and the number of the steel cables is single or multiple according to the cable net structure; when a plurality of ropes are arranged, the rope bodies are divided into an upper layer and a lower layer and are arranged on the cableway 52 of the steel rope clamp 5.
Preferably, the wire rope clips 5 are arranged on the boundary ropes 1, eight boundary ropes 1 are arranged, and the boundary ropes are divided into an upper layer and a lower layer, and four layers are respectively connected to the cableways 52 of the wire rope clips 5.
Furthermore, the cableways 52 are arranged on the clamp body 51 at intervals and are arranged in a vertical layer, and the boundary cables 1 are arranged in a vertical layer and are arranged in the cableways 52.
A construction method of an unbalanced force resistant crossing type multi-node steel cable node structure comprises the following steps:
s1, stress analysis: according to the integral structure and the connection form of the cable net, carrying out stress analysis on the cable net structure, finding out an area with overlarge unbalanced force at the cable net boundary, and carrying out structural analysis on the area;
s2, establishing a model: modeling a cable net structure in an area with excessive unbalanced force, carrying out simulation analysis according to the model and construction steps to obtain the deformation and stress of a boundary cable 1 and an anti-slipping cable 4 of the cable net structure in the construction process, determining the length and specification of the anti-slipping cable 4, and marking the installation position of a steel cable clamp 5 on the anti-slipping cable 4;
s3, cable net assembly: assembling the cable net, and pre-assembling and reinforcing the cable net structure in the area with the excessive unbalanced force;
s4, cable net construction: lifting installation and stretch-draw forming of the cable net are carried out according to simulation analysis of the model; in the installation process, the stress state of the anti-slip cable 4 is monitored in real time, and the anti-slip cable 4 is ensured to be always in a tensioning state; the anti-slip cable 4 resists unbalanced force generated by the stabilizing cable 2 on the steel cable nodes at the two ends of the anti-slip cable 4 through tensioning;
s5, status detection: and after the cable net is tensioned and installed, detecting the working states of the anti-sliding cable 4 and the steel cable clamp 5 on the cable net structure in the area with the excessive unbalanced force after the cable net is stable, and ensuring that the anti-sliding cable 4 and the steel cable clamp 5 are always in a safe state to complete construction.
Further, in step S3, the assembling step of the cable net structure in the area with excessive unbalanced force is as follows:
s31, laying the boundary ropes 1 in sequence, and installing the steel cable clips 5 on the boundary ropes 1;
s32, laying the anti-slip cables 4, installing the cable bodies 41 of the anti-slip cables 4 on the steel cable clamps 5 positioned in the middle, keeping the cable bodies 41 in a free sliding state, and enabling no acting force to exist between the cable bodies 41 and the cableway 52;
s33, connecting the end part of the anti-slip cable 4 to the steel cable clamp 5 positioned at the outermost side, accurately adjusting the length and the installation position of the anti-slip cable 4, ensuring that the stress of the anti-slip cable 4 after installation meets the design requirement, and limiting the cable body 41 of the anti-slip cable 4;
and S34, assembling the stabilizing rope 2 and the bearing rope 3, and connecting the stabilizing rope and the bearing rope with the steel cable clamp 5.
Preferably, the operation method for adjusting the anti-slip cable 4 is as follows:
the length of the anti-slip cable 4 is measured using a graduated scale, and the length of the anti-slip cable 4 is precisely controlled by adjustment of the anchorage 42.
Preferably, after the cable net is formed, the deviation of the actual cable force value borne by the anti-slip cable 4 and the cable force design value in the stress analysis in the S2 is within 10%.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (10)
1. A span-type multi-node steel cable node structure capable of resisting unbalanced force is a cable net structure and bears a large unbalanced force section and is characterized by comprising a boundary cable (1), a stabilizing cable (2), a bearing cable (3), an anti-sliding cable (4) and steel cable clamps (5), wherein the steel cable clamps (5) are arranged on the boundary cable (1) at intervals, the steel cable clamps (5) on the unbalanced force section comprise the steel cable clamps (5) arranged at two ends and the steel cable clamps (5) arranged in the middle, the steel cable clamps (5) arranged in the middle are arranged at intervals, the stabilizing cable (2) is connected to the steel cable clamps (5) at the two ends, the bearing cable (3) is connected to the steel cable clamps (5), and the anti-sliding cable (4) is connected with the steel cable clamps (5);
the anti-slip cable (4) comprises a cable body (41), anchors (42) and connectors (43), wherein the cable body (41) is arranged between the two anchors (42), and the connectors (43) are arranged at the outer ends of the anchors (42);
the anti-slip cable is characterized in that two ends of the anti-slip cable (4) are fixedly connected to the steel cable clamps (5) at two ends, the whole length of the anti-slip cable (4) is unchanged, the anti-slip cable resists unbalanced force, a cable body (41) of the anti-slip cable (4) is movably connected to the steel cable clamp (5) in the middle, and the cable body (41) slides along the axis direction of the cable body.
2. The unbalanced force resistant cross-over multi-node wire rope node structure of claim 1, wherein: the anchorage device (42) comprises an adjusting anchorage device and a fixing anchorage device; the adjusting anchor comprises an anchor structure I (421) and an adjusting screw rod (422), the adjusting screw rod (422) is movably connected to the anchor structure I (421), and the connector (43) is movably connected to the adjusting screw rod (422); the fixed anchorage device comprises an anchorage device structure II (423) and a fixed connector (424), the fixed connector (424) is fixedly connected to the anchorage device structure II (423), and the fixed anchorage device is of an integrated structure.
3. The unbalanced force resistant cross-over multi-node wire rope node structure of claim 2, wherein: the steel cable clamp (5) comprises a clamp body (51), a cableway (52) and a connecting lug plate (53), the cableway (52) is arranged on the clamp body (51) at intervals, the connecting lug plate (53) is arranged at the inner end part of the clamp body (51), the cable body of the boundary cable (1) and the cable body (41) of the anti-sliding cable (4) are arranged in the cableway (52), and the bearing cable (3) is connected to the connecting lug plate (53).
4. The unbalanced force resistant cross-over multi-node wire rope node structure of claim 3, wherein: be equipped with connecting hole (511) and connection otic placode (53) on clamp (51), establish respectively on the inside and outside both sides face of clamp (51) connecting hole (511) and connection otic placode (53), adjusting screw (422) are connected in connecting hole (511), it connects on connection otic placode (53) to stabilize cable (2).
5. The unbalanced force resistant cross-over multi-node wire rope node structure of claim 3, wherein: be equipped with on clamp (51) and connect otic placode (53), connect otic placode (53) and establish respectively on the inside and outside both sides face of clamp (51), connector (43) of anti cable (4) that slides are connected on connecting otic placode (53) of clamp (51) inboard, stabilize cable (2) and connect on connecting otic placode (53) in the clamp (51) outside.
6. The unbalanced force resistant cross-over multi-node wire rope node structure of claim 3, wherein: the cableway (52) is arranged on the clamp body (51) at intervals and is arranged in an up-down layered mode, and the boundary cables (1) are arranged in an up-down layered mode and are arranged in the cableway (52).
7. The unbalanced force resistant cross-over multi-node wire rope node structure of claim 3, wherein: the cable body (41) of the anti-slip cable (4) is arranged on a cableway (52) of the middle steel cable clamp (5).
8. The method for constructing an unbalanced force resistant crossing type multi-node steel cable joint structure according to any one of claims 1 to 7, comprising the steps of:
s1, stress analysis: according to the integral structure and the connection form of the cable net, carrying out stress analysis on the cable net structure, finding out an area with overlarge unbalanced force at the cable net boundary, and carrying out structural analysis on the area;
s2, establishing a model: modeling a cable net structure in an area with excessive unbalanced force, carrying out simulation analysis according to the model and construction steps to obtain the deformation and stress of a boundary cable (1) and an anti-sliding cable (4) of the cable net structure in the construction process, and marking the installation position of a steel cable clamp (5);
s3, cable net assembly: assembling the cable net, and pre-assembling and reinforcing the cable net structure in the area with the excessive unbalanced force;
s4, cable net construction: lifting installation and stretch-draw forming of the cable net are carried out according to simulation analysis of the model;
s5, status detection: and after the cable net is tensioned and installed, after the cable net is stable, the working states of the anti-sliding cable (4) and the steel cable clamp (5) on the cable net structure in the area with the excessive unbalanced force are detected, and the anti-sliding cable (4) and the steel cable clamp (5) are always in a safe state, so that the construction is completed.
9. The method as claimed in claim 8, wherein the step of constructing the span-type multi-node steel cable node structure is further characterized by comprising the following steps: in step S3, the assembling steps of the cable net structure in the area with excessive unbalanced force are as follows:
s31, laying the boundary ropes (1) in sequence, and installing the steel cable clips (5) on the boundary ropes (1);
s32, laying the anti-slip cable (4), installing the cable body (41) of the anti-slip cable (4) on the steel cable clamp (5) in the middle, and keeping the cable body (41) in a free sliding state;
s33, connecting the end part of the anti-slip cable (4) to the steel cable clamp (5) positioned at the outermost side, accurately adjusting the length and the installation position of the anti-slip cable (4), ensuring that the stress of the anti-slip cable (4) meets the design requirement after installation, and limiting the cable body (41) of the anti-slip cable (4);
s34, assembling the stabilizing rope (2) and the bearing rope (3) and connecting the stabilizing rope and the bearing rope with the steel cable clamp (5).
10. The method as claimed in claim 9, wherein the step of constructing the span-type multi-node steel cable node structure is further characterized by comprising the following steps: the operation method for adjusting the anti-slip cable (4) is as follows:
the length of the anti-slip cable (4) is measured by using a graduated scale, and the length of the anti-slip cable (4) is accurately controlled by adjusting the anchorage device (42).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114562027B (en) * | 2022-03-09 | 2023-11-28 | 北京市建筑工程研究院有限责任公司 | Anti-slip cable clamp node structure and construction method |
| CN114541775B (en) * | 2022-04-28 | 2022-07-19 | 北京市建筑工程研究院有限责任公司 | Multipoint control boundary cable lifting installation structure and method |
| CN116145817B (en) * | 2023-04-17 | 2023-08-15 | 北京市建筑工程研究院有限责任公司 | Cable net structure with multiple flexible cable edges and forming method thereof |
| CN116791762B (en) * | 2023-08-23 | 2023-10-20 | 山西清露金华节能科技有限公司 | Cable net connecting device for air film building construction |
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