CN110747997A - Construction method of large-curvature cable membrane structure with cable membrane synergistic effect - Google Patents
Construction method of large-curvature cable membrane structure with cable membrane synergistic effect Download PDFInfo
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- CN110747997A CN110747997A CN201911028904.4A CN201911028904A CN110747997A CN 110747997 A CN110747997 A CN 110747997A CN 201911028904 A CN201911028904 A CN 201911028904A CN 110747997 A CN110747997 A CN 110747997A
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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
- E04B1/34—Extraordinary structures, e.g. with suspended or cantilever parts supported by masts or tower-like structures enclosing elevators or stairs; Features relating to the elastic stability
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- 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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- 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
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Abstract
The invention discloses a construction method of a large-curvature cable membrane structure with cable membrane synergistic effect, wherein the large-curvature cable membrane structure with cable membrane synergistic effect comprises a peripheral rigid edge member, a radial cable, a transverse cable, a membrane, a cable clamp and a membrane clamping plate; the construction steps comprise the main steps of prefabricating the cable membrane and related nodes in a prefabricating factory, penetrating radial cables into a membrane surface cable sleeve of the membrane, integrally hoisting the membrane surface and a cable net, tensioning the membrane surface of the membrane and the like; the construction method of the large-curvature cable membrane structure with the cable membrane synergistic effect provided by the invention has the advantages of low construction difficulty and high construction efficiency, a stable structure is formed by jointly tensioning the cable net and the single-layer membrane, the single-layer cable net is a main stressed structure in the structure, the structure has the advantages of high rigidity and good stability, the cable is tensioned, and the cable membrane structure with various shapes can be manufactured by controlling the cable forces of the radial cables and the transverse cables to form the target curved surface.
Description
Technical Field
The invention relates to the technical field of building membrane structures, in particular to a construction method of a large-curvature cable membrane structure with cable membrane synergistic effect.
Background
With the continuous development of society, people increasingly desire public activity spaces such as large-scale exhibition halls, sports stadiums, airports, railway stations and the like; meanwhile, as the aesthetic level of people is continuously improved, the requirements on the beauty, lightness and the like of buildings are also continuously increased; the cable membrane structure is more and more popular with the public due to the rich color, the light structural form and the beautiful shape. These phenomena greatly promote the continuous innovation of the cable membrane structure. Not only is the innovation in the aspects of safety and economy, but also the innovation in the aspect of modeling, and the aesthetic requirements of people on continuous updating are met.
In recent years, the cable membrane structure is widely applied to the construction of stadiums, exhibition halls and high-speed railway stations at home and abroad. The cable membrane structure atress is reasonable, and structural efficiency is higher, and it is clear to pass the power route, has utilized the atress performance of high strength cable fully, has guaranteed structural rigidity, has utilized the membrane material to have characteristics such as the light transmissivity is good, the color is abundant to make the structure become slim and graceful, rich in expressive force when reducing the steel volume.
At present, the construction of the cable membrane has the problems of high construction difficulty and low efficiency; in addition, a single-layer tension type membrane structure is mainly used in the tension membrane structure, the structure is characterized in that supporting points are provided for members such as rods, anchoring points are arranged around the supporting points, and a stable system is formed by tensioning single-layer membrane materials; and the commonly used film material is a coating fabric film material, and the light transmission performance is poor.
Disclosure of Invention
The invention aims to provide a construction method of a large-curvature cable membrane structure with cable membrane synergistic effect, which aims to solve the problems in the prior art and has the advantages of low construction difficulty and high construction efficiency.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a construction method of a large-curvature cable membrane structure with cable membrane synergistic effect, wherein the large-curvature cable membrane structure with cable membrane synergistic effect comprises a peripheral rigid edge member, a radial cable, a transverse cable, a membrane, a cable clamp and a membrane clamping plate; the radial cables and the transverse cables are respectively provided with a plurality of cables, the plurality of radial cables are radially distributed in a cable membrane distribution area surrounded by the peripheral rigid edge member, the plurality of transverse cables are transversely distributed in a cable membrane distribution area surrounded by the peripheral rigid edge member, the crossing positions of the radial cables and the transverse cables are limited and fixed through the cable clips, and the two ends of the radial cables and the two ends of the transverse cables are connected with the peripheral rigid edge member through adjustable anchors; the film is stretched in a cable-film distribution area defined by the peripheral rigid edge member, a plurality of cable sleeves on the film, which are matched with the radial cables, are distributed on the inner side of the film, cable bodies of the radial cables penetrate through the cable sleeves on the film, a film clamping plate is arranged at the edge of the film along the edge contour of the film, and the film clamping plate is connected with the peripheral rigid edge member through a plurality of adjusting bolts;
the concrete construction steps of the large-curvature cable membrane structure with cable membrane synergistic effect are as follows:
the method comprises the following steps: prefabricating the membrane and the cable sleeve on the membrane at a factory and transporting to a site; paving batten cloth below the construction and installation structure, and spreading the membrane according to membrane surface subareas;
step two: prefabricating the radial cables, the transverse cables, the cable clamps, the film clamping plates and the adjusting bolts at a factory and transporting to a site; marking the crossing positions of the radial cables and the transverse cables according to design requirements;
step three: sequentially penetrating the radial cables into cable sleeves on the membrane, and then paving the transverse cables to the specified positions at the bottoms of the radial cables; connecting the radial cables and the transverse cables at the crossing positions of the radial cables and the transverse cables marked in the step two by using the cable clamps;
step four: connecting each of the radial cables and the transverse cable ends to one end of the adjustable anchor; the film clamping plate is arranged on the edge of the film;
step five: hoisting the film surface of the film and a cable net formed by the radial cables and the transverse cables to a specified position integrally, fixing the other ends of the adjustable anchors on the radial cables and the transverse cables on the peripheral rigid edge member, and connecting the film clamping plate with the peripheral rigid edge member by using the adjusting bolts;
step six: prestressing the radial cables and the transverse cables in multiple stages;
step seven: connecting the film clamping plate with the peripheral rigid edge member with the adjusting bolt and prestressing the film.
Preferably, the specific steps of the fifth step are as follows: after the film surface of the film and the cable net formed by the radial cables and the transverse cables are determined to be integrally installed, the film material is slowly lifted to a specified position by an electric hoist or a winch and a crank arm vehicle, and the film surface is pulled by flexible hauling ropes at two sides while the film material is slowly lifted; after the membrane material is hoisted to the designated position, a climbing vehicle is used for conveying constructors to the designated position, and the cable net end part formed by each radial cable and each transverse cable is connected with the peripheral rigid edge member through the adjustable anchorage device
Preferably, the membrane is a single layer ETFE membrane.
Preferably, the peripheral rigid edge member is a concrete support member or a steel support member or an aluminium alloy support member.
Preferably, the cable bodies of the radial cables and the transverse cables are Galfan plating cables or stainless steel cables or FRP cables.
Preferably, the adjustable anchor is a fork ear sleeve adjustable anchor, and comprises a cable end part cable head, a sleeve, a double-lug cable head, a first screw and a second screw, wherein a rivet is arranged at one end of an inner cavity of the cable end part cable head, the cable end part of the radial cable or the transverse cable extends into the inner cavity of the cable end part cable head and is connected with the cable end part cable head through the rivet, the other end of the inner cavity of the cable end part cable head is in threaded connection with the first screw, one end of the double-lug cable head is connected with the peripheral rigid edge component through a rivet, the other end of the double-lug cable head is in threaded connection with the second screw, and one end of the first screw, which protrudes out of the cable end part cable head, is connected with one end of the second screw, which protrudes out of the double-lug cable head, through the sleeve.
Preferably, the cable clamp includes vertical first clamping piece, second clamping piece and the third clamping piece that sets gradually, the bottom of first clamping piece is provided with first centre gripping groove, the top of second clamping piece be provided with the second centre gripping groove that first centre gripping groove cooperation set up, the cable body centre gripping of horizontal cable is in first centre gripping groove with in the second centre gripping inslot, the bottom of second clamping piece is provided with the third centre gripping groove, the top of third clamping piece be provided with third centre gripping groove complex fourth centre gripping groove, radial cable centre gripping is in third centre gripping groove with in the fourth centre gripping inslot, first clamping piece the second clamping piece with through high strength bolt connection between the third clamping piece, the bolt is screwed and is made first clamping piece the second clamping piece with the third clamping piece presss from both sides tightly radial cable with horizontal cable.
Preferably, the cable sleeve on the membrane is arranged on the inner side of the membrane, and the cable sleeve on the membrane is a membrane with two sides hot-pressed on the membrane.
Preferably, the double-layered diaphragm plate is the aluminum alloy material, the both ends of double-layered diaphragm plate all are provided with the joint groove, the edge parcel of membrane has the adhesive tape, the adhesive tape joint is in the joint inslot of double-layered diaphragm plate one end, adjusting bolt's nut joint is in the joint inslot of the double-layered diaphragm plate other end, adjusting bolt's screw rod end then through the nut with peripheral rigidity edge component limit connection.
Compared with the prior art, the invention has the following beneficial technical effects:
the construction method of the large-curvature cable membrane structure with the cable membrane synergistic effect provided by the invention has the advantages that the construction difficulty is low, the construction efficiency is high, the single-layer tension membrane is stiffened through the cable net, the structural rigidity is increased, the stability is enhanced, the large-curvature cable membrane structure can be manufactured, and the shape can be more diversified. The used material is an ETFE film material, and compared with a coating fabric film material, the ETFE film material has the advantages of good light transmittance, attractive appearance and light weight. The cable-net reinforced umbrella-shaped single-layer ETFE membrane structure has the advantages of novel structure form, reasonable structural stress, attractive building appearance and the like, is convenient to manufacture and install, and has strong practical significance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is an isometric view of a large curvature cord membrane structure in which the cord membrane of the present invention acts synergistically;
FIG. 2 is a schematic structural diagram of one of the large-curvature cord membranes of the synergistic cord membrane of the present invention;
FIG. 3 is a schematic diagram of the construction of a grommet on a membrane according to the present invention;
FIG. 4 is a schematic view of an adjustable anchor according to the present invention;
FIG. 5 is a top down assembly view of the cable clamp of the present invention with radial and transverse cables;
FIG. 6 is a perspective assembly view of the cable clamp of the present invention with radial and transverse cables;
FIG. 7 is a schematic view of a first clip of the present invention;
FIG. 8 is a schematic view of a second clip of the present invention;
FIG. 9 is a schematic view of a third clip of the present invention;
FIG. 10 is a schematic view of the assembly of the membrane, the membrane clamping plate, the adjustment bolt and the peripheral rigid edge member of the present invention;
FIG. 11 is a schematic partial perspective view of the assembly of the membrane and the membrane sandwiching plate of the present invention;
in the figure: 1-a peripheral rigid edge member; 2-a radial cable; 3-transverse cables; 3-1-transverse cord a; 3-2-transverse cord b; 3-3-transverse cord c; 3-4-transverse cable d; 3-5-transverse cord e; 4-film formation; 5-cable sleeving on the membrane; 6-a cable clamp; 7-a film clamping plate; 8-adjusting the bolt; 9-an adjustable anchor; 10-cable head at the end of the cable body; 11-a sleeve; 12-a binaural cable head; 13-a first screw; 14-a second screw; 15-riveting sheets; 16-a rivet; 17-a first clip; 18-a second clip; 19-a third jaw; 20-a first clamping groove; 21-a second clamping groove; 22-a third clamping groove; 23-a fourth clamping groove; 24-a high-strength bolt; 25-adhesive tape.
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 embodiments of the present invention, 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.
The invention aims to provide a construction method of a large-curvature cable membrane structure with cable membrane synergistic effect, and aims to solve the problems in the prior art.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The embodiment provides a construction method of a large-curvature cable membrane structure with cable membrane synergistic effect, wherein the large-curvature cable membrane structure with cable membrane synergistic effect is specifically an umbrella-shaped single-layer membrane structure with bidirectional negative gauss large curvature, as shown in fig. 1 and fig. 2, and comprises a peripheral rigid edge member 1, radial cables 2, transverse cables 3, a membrane 4, a cable clamp 6 and a membrane clamping plate 7; the radial cables 2 and the transverse cables 3 are respectively provided with a plurality of radial cables 2, the radial cables 2 are radially distributed in a cable membrane distribution area surrounded by the peripheral rigid edge member 1, and the transverse cables 3 are transversely distributed in a cable membrane distribution area surrounded by the peripheral rigid edge member 1; the crossing position of the radial cable 2 and the transverse cable 3 is limited and fixed through a cable clamp 6; the two ends of the radial cable 2 and the two ends of the transverse cable 3 are connected with the peripheral rigid edge member 1 through adjustable anchors 9, and the cable force can be changed by adjusting the adjustable anchors 9 after the connection, so that the cable force control function is realized; the membrane 4 is stretched in a cable membrane distribution area surrounded by the peripheral rigid edge member 1, a plurality of cable sleeves 5 on the membrane, which are matched with the radial cables 2, are distributed on the inner side of the membrane 4, and cable bodies of the radial cables 2 are arranged in the cable sleeves 5 on the membrane in a penetrating way, so that the cable bodies play a role of common stress in the stretching process; the edge of the membrane 4 is provided with a membrane clamping plate 7 along the edge contour of the membrane 4, the membrane clamping plate 7 is connected with the peripheral rigid edge member 1 through a plurality of adjusting bolts 8, and the membrane 4 is prestressed through adjusting the length of the adjusting bolts 8.
The concrete construction steps of the large-curvature cable membrane structure with cable membrane synergistic effect are as follows:
the method comprises the following steps: prefabricating the membrane 4 and the cable sleeve 5 on the membrane in a factory and transporting to the site; laying a piece of cloth strip below the construction and installation structure, and spreading the membrane 4 according to membrane surface subareas;
step two: prefabricating the radial cables 2, the transverse cables 3, the cable clamps 6, the film clamping plates 7 and the adjusting bolts 8 in a factory and conveying the cables to the site; marking the crossing positions of the radial cables 2 and the transverse cables 3 according to the design requirements;
step three: firstly, sequentially penetrating the radial cables 2 into cable sleeves 5 on the membrane, and then paving the transverse cables 3 to the specified positions at the bottoms of the radial cables 2; connecting the radial cables 2 and the transverse cables at the crossing positions of the radial cables 2 and the transverse cables 3 marked in the step two by using cable clamps 6;
step four: connecting the end parts of the radial cables 2 and the transverse cables 3 with one end of an adjustable anchorage device 9; and a film clamping plate 7 is arranged at the edge of the film 4;
step five: after the film surface of the film 4 and the cable net formed by the radial cables 2 and the transverse cables 3 are determined to be integrally installed, the film material (the film surface of the film 4 and the cable net formed by the radial cables 2 and the transverse cables 3) is slowly lifted to a specified position by an electric hoist or a winch and a crank arm vehicle, and the film surface is pulled by flexible hauling ropes at two sides while the film material is slowly lifted; after the membrane material is hoisted to the designated position, a worker is sent to the designated position by a climbing vehicle, the other ends of the adjustable anchors 9 on the radial cables 2 and the transverse cables 3 are fixed on the peripheral rigid edge member 1, and the membrane clamping plate 7 is connected with the peripheral rigid edge member 1 by the adjusting bolts 8;
step six: prestress is applied to the radial cables 2 and the transverse cables 3 in a multi-time grading manner; the specific implementation method of the step is detailed by combining the structure of the large-curvature cable membrane with the synergistic effect of the single cable membrane provided by the attached figure 2: tensioning the cable force of all the radial cables 2 to a design value of 10% for the first time; then, adjusting the transverse cable 3, applying the prestress of the transverse cable a3-1 to 10% of a design value, redistributing the stress of the radial cable 2, increasing the cable force of the radial cable 2 to about 25% of the design value, continuously stretching the transverse cable b3-2 to about 30% of the design value, reducing the prestress of the transverse cable a3-1 to about 7% of the design value, continuously increasing the prestress of the radial cable 2, and increasing the design value to about 55%; then the transverse cable a3-1 is adjusted back, and the prestress of the cable is adjusted to 30% of the design value; and respectively tensioning the transverse cable d3-4 and the transverse cable e3-5 to 80% of the designed cable force value. At the moment, the prestress of the cable net is greatly redistributed, the stress of the radial cable 2 basically exceeds the design value by 10 percent, and the cable force of the radial cable 2 is controlled to be about 50 percent of the design value by controlling the adjustable anchorage 9 through displacement. Respectively adjusting a transverse cable a3-1 and a transverse cable b3-2 to ensure that the cable force reaches 80% of the design; and tensioning the transverse cable c3-3 to 80% of the design value of the cable force, wherein the prestress of the radial cable 2 slightly exceeds the design value, repeatedly loosening the adjustable anchorage device 9, redistributing the stress, reducing the prestress of the transverse cable, finely adjusting each transverse cable, respectively tensioning to 80% of the design value, and continuously adjusting the displacement of the radial cable 2 to keep the cable force at about 80% of the design value. Finally, integral fine adjustment is carried out for many times, so that the cable force of the cable net reaches 90% of the design value.
Step seven: after the cable net (the cable net formed by the radial cables 2 and the transverse cables 3) is formed, the film clamping plate 7 is connected with the peripheral rigid edge member 1 by using an adjusting bolt 8, and prestress is applied to the film 4; firstly, the whole membrane 4 is tensioned for the first time, the prestress of the membrane material is tensioned to 70% of the design value, and the prestress of the cable net is kept to be about 80% of the design value. And then gradually adjusting the high-strength bolts and the adjustable anchorage devices 9 around the membrane material, and finally controlling the membrane surface prestress and the cable net prestress to be 100% of the design values.
In this embodiment, the film 4 is preferably a single-layer ETFE film, the light transmittance of the ETFE film can reach 95% at most, and the mass of the ETFE film is only 1% of that of glass in the same area, so that the film plays a good decorative role in the structure, forms a certain initial stiffness in the tensioning process, and plays a certain role in resisting external loads. The upper membrane grommet 5 is disposed inside the membrane 4, and as shown in fig. 3, the upper membrane grommet 5 is a membrane sheet whose both sides are hot-pressed on the membrane 4, the material of the membrane sheet for making the upper membrane grommet 5 is the same as that of the membrane 4, and when the membrane 4 is a single-layer ETFE membrane, the upper membrane grommet 5 is also an ETFE membrane.
In this embodiment, the peripheral rigid edge member 1 is a concrete support member or a steel support member or an aluminium alloy support member; the peripheral rigid edge member 1 is prefabricated according to the cable membrane structure with the required shape, and the transverse cables 3, the radial cables 2, the single-layer ETFE membrane and other related accessories are arranged in the cable membrane distribution area surrounded by the peripheral rigid edge member in the assembling process.
In this embodiment, the cable bodies of the radial cables 2 and the transverse cables 3 are Galfan plating cables or stainless steel cables or FRP cables.
As shown in fig. 4, the adjustable anchor 9 is a fork ear sleeve adjustable anchor, and includes a cable head 10 at an end of a cable body, a sleeve 11, a double-lug cable head 12, a first screw 13 and a second screw 14, wherein one end of an inner cavity of the cable head 10 at the end of the cable body is provided with a rivet 15, the end of the cable body of a radial cable 2 or a transverse cable 3 extends into the inner cavity of the cable head 10 at the end of the cable body and is connected with the cable head 10 at the end of the cable body through the rivet 15 (fig. 3 shows that the adjustable anchor 9 is connected with the radial cable 2), the other end of the inner cavity of the cable head 10 at the end of the cable body is in threaded connection with the first screw 13, one end of the double-lug cable head 12 is connected with the peripheral rigid edge member 1 through a rivet 16, the other end of the double-lug cable head 12 is in threaded connection with the second screw 14, and one end of the first screw 13; when the radial cables 2 and the transverse cables 3 are installed, the length of the first screw 13 and the second screw 14 on the anchorage device is adjusted through threaded connection, so that the length of the radial cables 2 or the transverse cables 3 is controlled to endow and change the prestress of the radial cables 2 or the transverse cables 3.
As shown in fig. 5-9, the cable clamp 6 includes a first clamping piece 17, a second clamping piece 18 and a third clamping piece 19 which are vertically arranged in sequence, a first clamping groove 20 is arranged at the bottom of the first clamping piece 17, a second clamping groove 21 which is matched with the first clamping groove 20 is arranged at the top of the second clamping piece 18, the cable body of the transverse cable 3 is clamped in the first clamping groove 20 and the second clamping groove 21, a third clamping groove 22 is arranged at the bottom of the second clamping piece 18, a fourth clamping groove 23 which is matched with the third clamping groove 22 is arranged at the top of the third clamping piece 19, the radial cable 2 is clamped in the third clamping groove 22 and the fourth clamping groove 23, the first clamping piece 17, the second clamping piece 18 and the third clamping piece 19 are connected through a high-strength bolt 24, and the high-strength bolt 24 is screwed to enable the first clamping piece 17, the second clamping piece 18, the third clamping piece 19 to clamp the radial cable 2 and the transverse cable 3; the membrane 4 opposite to the crossing position of the radial cable 2 and the transverse cable 3 is not provided with a membrane cable sleeve 5, after the radial cable 2 is arranged in the membrane cable sleeve 5 in a penetrating way and connected with the membrane 4, the transverse cable 3 is arranged at the bottom of the membrane cable sleeve, and then the radial cable 2 and the transverse cable 3 are clamped and fixed through a cable clamp 6; the arrangement of the cable clamp 6 can prevent the crossed radial cables 2 and the crossed transverse cables 3 from sliding, and the stability of the structure is ensured.
As shown in fig. 10-11, the film-clamping plate 7 is made of an aluminum alloy material, clamping grooves are formed in both ends of the film-clamping plate 7, an adhesive tape 25 wraps the edge of the film 4, the adhesive tape 25 is circumferentially distributed along the edge profile of the film 4, the adhesive tape 25 is clamped in the clamping groove (the clamping groove is a circular clamping groove) at one end of the film-clamping plate 7, a nut of the adjusting bolt 8 is clamped in the clamping groove (the clamping groove is a rectangular clamping groove) at the other end of the film-clamping plate 7, and a screw end of the adjusting bolt 8 is in limit connection with the peripheral rigid edge member 1 through the nut; the number of the adjusting bolts 8 is flexibly selected according to the size and specification of the cable membrane structure.
The invention forms a stable structure by jointly tensioning the cable net and the single-layer ETFE membrane. In the structure, a single-layer cable net is a main stress structure, and a target curved surface is formed by tensioning cables and controlling the cable force of radial cables 2 and transverse cables 3. The light transmittance of the ETFE film can reach 95% at most, and the mass of the ETFE film is only 1% of that of glass in the same area, so that the ETFE film plays a good decorative role in a structure, forms certain initial rigidity in the tensioning process, and has a certain effect on resisting external loads.
The principle and the implementation mode of the invention are explained by applying specific examples, and the description of the above examples is only used for helping understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In summary, this summary should not be construed to limit the present invention.
Claims (9)
1. A construction method of a large-curvature cable membrane structure with cable membrane synergistic effect is characterized by comprising the following steps: the large-curvature cable membrane structure with cable membrane synergistic effect comprises a peripheral rigid edge member, radial cables, transverse cables, membranes, cable clamps and a membrane clamping plate; the radial cables and the transverse cables are respectively provided with a plurality of cables, the plurality of radial cables are radially distributed in a cable membrane distribution area surrounded by the peripheral rigid edge member, the plurality of transverse cables are transversely distributed in a cable membrane distribution area surrounded by the peripheral rigid edge member, the crossing positions of the radial cables and the transverse cables are limited and fixed through the cable clips, and the two ends of the radial cables and the two ends of the transverse cables are connected with the peripheral rigid edge member through adjustable anchors; the film is stretched in a cable-film distribution area defined by the peripheral rigid edge member, a plurality of cable sleeves on the film, which are matched with the radial cables, are distributed on the inner side of the film, cable bodies of the radial cables penetrate through the cable sleeves on the film, a film clamping plate is arranged at the edge of the film along the edge contour of the film, and the film clamping plate is connected with the peripheral rigid edge member through a plurality of adjusting bolts;
the concrete construction steps of the large-curvature cable membrane structure with cable membrane synergistic effect are as follows:
the method comprises the following steps: prefabricating the membrane and the cable sleeve on the membrane at a factory and transporting to a site; paving batten cloth below the construction and installation structure, and spreading the membrane according to membrane surface subareas;
step two: prefabricating the radial cables, the transverse cables, the cable clamps, the film clamping plates and the adjusting bolts at a factory and transporting to a site; marking the crossing positions of the radial cables and the transverse cables according to design requirements;
step three: sequentially penetrating the radial cables into cable sleeves on the membrane, and then paving the transverse cables to the specified positions at the bottoms of the radial cables; connecting the radial cables and the transverse cables at the crossing positions of the radial cables and the transverse cables marked in the step two by using the cable clamps;
step four: connecting each of the radial cables and the transverse cable ends to one end of the adjustable anchor; the film clamping plate is arranged on the edge of the film;
step five: hoisting the film surface of the film and a cable net formed by the radial cables and the transverse cables to a specified position integrally, fixing the other ends of the adjustable anchors on the radial cables and the transverse cables on the peripheral rigid edge member, and connecting the film clamping plate with the peripheral rigid edge member by using the adjusting bolts;
step six: prestressing the radial cables and the transverse cables in multiple stages;
step seven: connecting the film clamping plate with the peripheral rigid edge member with the adjusting bolt and prestressing the film.
2. The construction method of the large-curvature cable membrane structure with the cable membrane synergistic effect according to claim 1, characterized by comprising the following steps of: the concrete steps of the fifth step are as follows: after the film surface of the film and the cable net formed by the radial cables and the transverse cables are determined to be integrally installed, the film material is slowly lifted to a specified position by an electric hoist or a winch and a crank arm vehicle, and the film surface is pulled by flexible hauling ropes at two sides while the film material is slowly lifted; after the membrane material is hoisted to the designated position, a climbing vehicle is used for conveying constructors to the designated position, and the cable net end part formed by each radial cable and each transverse cable is connected with the peripheral rigid edge member through the adjustable anchorage device.
3. The construction method of the large-curvature cable membrane structure with the cable membrane synergistic effect according to claim 1, characterized by comprising the following steps of: the membrane is a single layer ETFE membrane.
4. The construction method of the large-curvature cable membrane structure with the cable membrane synergistic effect according to claim 1, characterized by comprising the following steps of: the peripheral rigid edge member is a concrete support member or a steel support member or an aluminium alloy support member.
5. The construction method of the large-curvature cable membrane structure with the cable membrane synergistic effect according to claim 1, characterized by comprising the following steps of: the radial cables and the transverse cables are Galfan plating cables or stainless steel cables or FRP cables.
6. The construction method of the large-curvature cable membrane structure with the cable membrane synergistic effect according to claim 1, characterized by comprising the following steps of: the adjustable anchorage device is a fork lug sleeve adjusting type anchorage device and comprises a rope end part rope head, a sleeve, a double-lug rope head, a first screw rod and a second screw rod, wherein a rivet sheet is arranged at one end of an inner cavity of the rope end part rope head of the rope body, the end part of the rope body of the radial rope or the transverse rope extends into the inner cavity of the rope end part rope head of the rope body and is connected with the rope end part rope head of the rope body through the rivet sheet, the other end of the inner cavity of the rope end part rope head of the rope body is in threaded connection with the first screw rod, one end of the double-lug rope head is connected with the peripheral rigid edge component through a rivet, the other end of the double-lug rope head is in threaded connection with the second screw rod, and one end of the first screw rod protruding out of the end part rope head of the rope body and one.
7. The construction method of the large-curvature cable membrane structure with the cable membrane synergistic effect according to claim 1, characterized by comprising the following steps of: the cable clamp comprises a first clamping piece, a second clamping piece and a third clamping piece which are vertically and sequentially arranged, wherein a first clamping groove is formed in the bottom of the first clamping piece, a second clamping groove matched with the first clamping groove is formed in the top of the second clamping piece, a cable body of the transverse cable is clamped in the first clamping groove and the second clamping groove, a third clamping groove is formed in the bottom of the second clamping piece, a fourth clamping groove matched with the third clamping groove is formed in the top of the third clamping piece, the radial cable is clamped in the third clamping groove and the fourth clamping groove, the first clamping piece is connected with the second clamping piece through high-strength bolts, and the high-strength bolts enable the first clamping piece to be screwed tightly, the second clamping piece is screwed tightly with the third clamping piece, and the radial cable is connected with the transverse cable.
8. The construction method of the large-curvature cable membrane structure with the cable membrane synergistic effect according to claim 1, characterized by comprising the following steps of: the cable sleeve on the membrane is arranged on the inner side of the membrane, and the cable sleeve on the membrane is a membrane with two sides hot-pressed on the membrane.
9. The construction method of the large-curvature cable membrane structure with the cable membrane synergistic effect according to claim 1, characterized by comprising the following steps of: the utility model discloses a clamp diaphragm plate, including double-layered diaphragm plate, including the clamp diaphragm plate, the edge parcel of membrane has the adhesive tape, the adhesive tape joint is in the joint inslot of double-layered diaphragm plate one end, adjusting bolt's nut joint is in the joint inslot of the double-layered diaphragm plate other end, adjusting bolt's screw rod end then through the nut with peripheral rigidity edge component spacing connection.
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| CN113789866A (en) * | 2021-07-29 | 2021-12-14 | 中铁建工集团有限公司 | Umbrella-shaped cable membrane structure and construction method thereof |
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