CN104120831A - Large-span inflatable pre-stress truss string and construction method thereof - Google Patents
Large-span inflatable pre-stress truss string and construction method thereof Download PDFInfo
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- CN104120831A CN104120831A CN201410392166.2A CN201410392166A CN104120831A CN 104120831 A CN104120831 A CN 104120831A CN 201410392166 A CN201410392166 A CN 201410392166A CN 104120831 A CN104120831 A CN 104120831A
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Abstract
The invention relates to a large-span inflatable pre-stress truss string and a construction method thereof and aims at solving the problems that the stability of a support rod is required to be considered, the field construction efficiency is low and a pure inflatable structure is low in bearing force in an existing truss string structure. The large-span inflatable pre-stress truss string consists of a truss, a main inhaul cable, a low inner pressure inflatable airbag and a base plate. The construction method of the large-span inflatable pre-stress truss string comprises the following steps: manufacturing a truss rod, the main inhaul cable and the base plate in a factory according to the building and structure design, and cutting the airbag; subsequently splicing the truss in a construction field and connecting the truss with the base plate, the low inner pressure inflatable airbag and the main inhaul cable; inflating the low inner pressure inflatable airbag to reach the designed inner pressure, and setting pre-tress; and finally performing hoisting in position, mounting and fixing. The large-span inflatable pre-stress truss string is suitable for large-span space structures, temporary bridges, temporary buildings and the like.
Description
Technical field
The present invention relates to large span air filling type prestressing force truss string structure and construction method thereof.
Background technology
In existing large-span space structure, a beam string structure and membrane structure theoretical research and construction technology be development to some extent all.Open beam string structure deadweight little, bearing capacity is high, but in the time that span is larger, considers the requirement of the sag ratio of suitable ratio of rise to span and rope, and vertical rigidity pressurized strut is often elongate rod, and destabilization problems is most important.Membrane structure mainly comprises inflatable membrane structure, As Tension Foundations of Tensile Cable-membrane Structures, skeleton suspension type membrane structure.In inflatable membrane structure, due to the easy fold of film, bearing capacity is on the low side.In rope membrane structure, dead load is very little, consider the problems such as the charming appearance and behaviour response of membrane structure.
In the construction of prestressing force truss string structure, need the tensioning equipments such as punching jack, need to build tension operation platform; In the construction of unidirectional truss string structure and Bidirectional String Structure truss, sometimes also need to build sliding rail, when stretch-draw, prestressed cable often needs multistage stretch-draw, multiple prestressed cable simultaneous tension, and this all increases difficulty of construction undoubtedly.
Summary of the invention
The present invention will solve the problem that needs to consider strut stability and low, the pure inflatable structures low bearing capacity of site operation efficiency in existing truss-string-structure, and large span air filling type prestressing force truss string structure and construction method thereof are provided.
Large span air filling type prestressing force truss string structure of the present invention is made up of truss, main drag-line, the low interior pressure air bag of spindle, backing plate and multiple strop; Described truss comprises upper chord, lower chord and web member, and upper chord, lower chord are passed through and are connected mutually by welding respectively with web member; The left end of described upper chord and lower chord is fixed by welding on left welded spherical node surface, the right-hand member of described upper chord and lower chord is fixed by welding in backhand welding and receives on node surface, has through hole in the middle of described left welded spherical node and right welded spherical node; Described backing plate is fixed by welding in truss lower edge plane, be provided with the low interior pressure air bag of spindle in backing plate lower end, the soffit of the low interior pressure air bag of described spindle is provided with multiple horizontal nooses, vertical direction at the external surface of the low interior pressure air bag of described spindle is provided with the noose group being made up of multiple vertical nooses, in the vertical direction of the external surface of the low interior pressure air bag of described spindle multiple noose groups that be arranged in parallel; Described multiple horizontal noose and multiple noose group are connected to low interior pressure air bag external surface by bonding, described main drag-line is connected with the low interior pressure air bag of spindle through multiple horizontal nooses, the left end of described main drag-line is fixed in left welded spherical node by ground tackle, and the right-hand member of described main drag-line is fixed in right welded spherical node by ground tackle; Described multiple strop is connected with the low interior pressure air bag of spindle through noose group respectively, and the upper end of multiple strops is by ground tackle and the outer surface that is bolted to lower chord; Described main drag-line is connected by bidirectional crossed socket point with multiple strops.
The construction method of above-mentioned large span air filling type prestressing force truss string structure is carried out according to the following steps:
One, first upper chord and lower chord are shaped by required physical dimension, then upper chord, lower chord are passed through and are connected mutually by welding respectively with web member, obtain truss;
Two, backing plate is fixed by welding in the truss lower edge plane that step 1 obtains, backing plate lower plane flushes with lower chord bottom surface; Backing plate and lower chord contact position smooth treatment are also used membrane covered;
Three, the low interior pressure air bag of factory's cutting spindle, two ends arrange inflation and pressure tester;
Four, the low interior pressure air bag of spindle that main drag-line obtains with step 3 through multiple horizontal nooses is connected, the through hole of the left welded spherical node of the truss that the left end of main drag-line is obtained through step 1 is also fixed by crab-bolt, the right-hand member of main drag-line is fixed through the through hole of the right welded spherical node of truss and by crab-bolt, multiple strops are connected with the low interior pressure air bag of spindle through noose group respectively, and the upper end of multiple strops is by ground tackle and the outer surface that is bolted to lower chord; Be connected with multiple strops by the bidirectional crossed socket main drag-line of naming a person for a particular job, obtain large span air filling type prestressing force truss string structure;
Five, the two ends of large span air filling type prestressing force truss string structure are placed on support, are inflated to design air pressure by inflation and the pressure tester at the low interior pressure air bag of spindle two ends to the low interior pressure air bag of spindle, set up the initial prestressing force of structure;
Six, hoisted in position, bearing connects, and completes the assembling of large span air filling type prestressing force truss string structure.
Large span air filling type prestressing force truss string structure of the present invention is made up of truss, main drag-line, cylindrical low interior pressure air bag and backing plate; Described truss comprises upper chord, lower chord and web member, and upper chord, lower chord are passed through and are connected mutually by welding respectively with web member; The left end of described upper chord and lower chord is fixed by welding on left welded spherical node surface, and the right-hand member of described upper chord and lower chord is fixed by welding in backhand welding and receives on node surface; Described backing plate is fixed by welding in truss lower edge plane, be provided with cylindrical low interior pressure air bag in backing plate lower end, the external surface of described cylindrical low interior pressure air bag is provided with multiple nooses, described multiple noose is connected to cylindrical low interior pressure air bag external surface by bonding, described main drag-line is spatially spiral shape through multiple nooses and is connected with cylindrical low interior pressure air bag, the end of described main drag-line is by ground tackle and be bolted to the lateral surface of lower edge plane of truss, and the infall of described main drag-line is by bidirectional crossed socket point connection.
The construction method of above-mentioned large span air filling type prestressing force truss string structure is carried out according to the following steps:
One, first upper chord and lower chord are shaped by required physical dimension, then upper chord, lower chord are passed through and are connected mutually by welding respectively with web member, obtain truss;
Two, backing plate is fixed by welding in the truss lower edge plane that step 1 obtains, backing plate lower plane flushes with lower chord bottom surface; Backing plate and lower chord contact position smooth treatment are also used membrane covered;
Three, the cylindrical low interior pressure air bag of factory's cutting, two ends arrange inflation and pressure tester;
Four, the cylindrical low interior pressure air bag that main drag-line obtains with step 3 through multiple nooses is connected, the end of main drag-line is by ground tackle and be bolted to the lateral surface of lower edge plane of truss, the infall of main drag-line connects by bidirectional crossed socket point, obtains large span air filling type prestressing force truss string structure;
Five, the two ends of large span air filling type prestressing force truss string structure are placed on support, are inflated to design air pressure to cylindrical low interior pressure air bag by inflation and the pressure tester at cylindrical low interior pressure air bag two ends, set up the initial prestressing force of structure;
Six, hoisted in position, bearing connects, and completes the assembling of large span air filling type prestressing force truss string structure.
Beneficial effect of the present invention:
1, the present invention, compared with truss-string-structure, adopts low interior pressure air bag to replace rigidity pressurized strut, has effectively avoided pressure bar stabilization problem, and has alleviated dead load; There is the low interior pressure air bag of certain rigidity for truss integral provides continuous elastomeric bearing, improved the stability of truss integral; Be that structure is applied to initial prestressed process to the gas replenishment process of air bag, without tensioning equipment, convenient and quick construction.
2, the present invention is compared with simple inflation beam, and truss of the present invention and main drag-line form couple opposing cross section moment of flexure at the upper and lower sides of low interior pressure air bag, do not exist air bag to crumple phenomenon; And the truss that belongs to rigidity system does not directly contact air-supported membrane structure with extraneous, eliminated simple air-supported membrane structure and met wind sensitive issue, has improved the resistivity to external load simultaneously.
3, the present invention is self-supporting, self equilibrium systems, and the horizontal thrust that truss produces is mainly born by main drag-line, and boundary constraint is mainly taking vertical counter-force as main.Therefore it is low that its boundary constraint requires, Bearing Seat Force is clear and definite, easily designing and making.
4, the present invention is in the time storing transport, and the shared volume of each several part member is little; On-site consolidation equipment and step are simple, and speed is fast, are not only applicable to large-span space structure, are also applicable to provisional property bridge or temporary building.
Brief description of the drawings
Fig. 1 is the elevation of large span air filling type prestressing force truss string structure described in detailed description of the invention one; Fig. 2 is the three-dimensional structure diagram of large span air filling type prestressing force truss string structure described in detailed description of the invention one; Fig. 3 is the elevation of large span air filling type prestressing force truss string structure described in detailed description of the invention six; Fig. 4 is the three-dimensional structure diagram of large span air filling type prestressing force truss string structure described in detailed description of the invention six.
Detailed description of the invention
Detailed description of the invention one: as illustrated in fig. 1 and 2, present embodiment large span air filling type prestressing force truss string structure is made up of truss 1, main drag-line 2, the low interior pressure air bag 3 of spindle, backing plate 4 and multiple strop 5; Described truss 1 comprises upper chord 6, lower chord 7 and web member 8, and upper chord 6, lower chord 7 are passed through and are connected mutually by welding respectively with web member 8; The left end of described upper chord 6 and lower chord 7 is fixed by welding on left welded spherical node 9 surfaces, it is upper that the right-hand member of described upper chord 6 and lower chord 7 is fixed by welding in right welded spherical node 10 surfaces, in the middle of described left welded spherical node 9 and right welded spherical node 10, has through hole; Described backing plate 4 is fixed by welding in truss 1 lower edge plane, be provided with the low interior pressure air bag 3 of spindle in backing plate 4 lower ends, the soffit of the low interior pressure air bag 3 of described spindle is provided with multiple horizontal nooses, vertical direction at the external surface of the low interior pressure air bag 3 of described spindle is provided with the noose group being made up of multiple vertical nooses, in the vertical direction of the external surface of the low interior pressure air bag 3 of described spindle multiple noose groups that be arranged in parallel; Described multiple horizontal noose and multiple noose group are connected to low interior pressure air bag 3 external surfaces by bonding, described main drag-line 2 is connected with the low interior pressure air bag 3 of spindle through multiple horizontal nooses, the left end of described main drag-line 2 is fixed in left welded spherical node 9 by ground tackle, and the right-hand member of described main drag-line 2 is fixed in right welded spherical node 10 by ground tackle; Described multiple strop 5 is connected with the low interior pressure air bag 3 of spindle through noose group respectively, and the upper end of multiple strops 5 is by ground tackle and the outer surface that is bolted to lower chord 7; Described main drag-line 2 is connected by bidirectional crossed socket point with multiple strops 5.
Present embodiment, compared with truss-string-structure, adopts low interior pressure air bag to replace rigidity pressurized strut, has effectively avoided pressure bar stabilization problem, and has alleviated dead load; There is the low interior pressure air bag of certain rigidity for truss integral provides continuous elastomeric bearing, improved the stability of truss integral; Be that structure is applied to initial prestressed process to the gas replenishment process of air bag, without tensioning equipment, convenient and quick construction.
Present embodiment is compared with simple inflation beam, and truss of the present invention and main drag-line form couple opposing cross section moment of flexure at the upper and lower sides of low interior pressure air bag, do not exist air bag to crumple phenomenon; And the truss that belongs to rigidity system does not directly contact air-supported membrane structure with extraneous, eliminated simple air-supported membrane structure and met wind sensitive issue, has improved the resistivity to external load simultaneously.
Present embodiment is self-supporting, self equilibrium systems, and the horizontal thrust that truss produces is mainly born by main drag-line, and boundary constraint is mainly taking vertical counter-force as main.Therefore it is low that its boundary constraint requires, Bearing Seat Force is clear and definite, easily designing and making.
Present embodiment is in the time storing transport, and the shared volume of each several part member is little; On-site consolidation equipment and step are simple, and speed is fast, are not only applicable to large-span space structure, are also applicable to provisional property bridge or temporary building.
Detailed description of the invention two: present embodiment is different from detailed description of the invention one: the material of the low interior pressure air bag 3 of described spindle is that tetrafluoroethene is without fabric substrate membrane material.Other are identical with detailed description of the invention one.
Detailed description of the invention three: present embodiment is different from detailed description of the invention one or two: the material of described multiple horizontal nooses and multiple vertical nooses is that tetrafluoroethene is without fabric substrate membrane material.Other are identical with detailed description of the invention one or two.
Detailed description of the invention four: present embodiment is different from one of detailed description of the invention one to three: lighting device is set in the low interior pressure air bag of described spindle 3 inside.So arrange, meet different building functions and requirement attractive in appearance.Other are identical with one of detailed description of the invention one to three.
Detailed description of the invention five: the construction method of present embodiment large span air filling type prestressing force truss string structure is carried out according to the following steps:
One, first upper chord 6 and lower chord 7 are shaped by required physical dimension, then upper chord 6, lower chord 7 are passed through and are connected mutually by welding respectively with web member 8, obtain truss 1;
Two, backing plate 4 is fixed by welding in the truss 1 lower edge plane that step 1 obtains, backing plate 4 lower planes flush with lower chord 7 bottom surfaces; Backing plate 4 is with lower chord 7 contact position smooth treatment and use membrane covered;
Three, the low interior pressure air bag 3 of factory's cutting spindle, two ends arrange inflation and pressure tester;
Four, the low interior pressure air bag 3 of spindle that main drag-line 2 obtains with step 3 through multiple horizontal nooses is connected, the through hole of the left welded spherical node 9 of the truss 1 that the left end of main drag-line 2 is obtained through step 1 is also fixed by crab-bolt, the right-hand member of main drag-line 2 is fixed through the through hole of the right welded spherical node 10 of truss 1 and by crab-bolt, multiple strops 5 are connected with the low interior pressure air bag 3 of spindle through noose group respectively, and the upper end of multiple strops 5 is by ground tackle and the outer surface that is bolted to lower chord 7; Be connected with multiple strops 5 by the bidirectional crossed socket main drag-line 2 of naming a person for a particular job, obtain large span air filling type prestressing force truss string structure;
Five, the two ends of large span air filling type prestressing force truss string structure are placed on support, are inflated to design air pressure by inflation and the pressure tester at the low interior pressure air bag of spindle 3 two ends to the low interior pressure air bag 3 of spindle, set up the initial prestressing force of structure;
Six, hoisted in position, bearing connects, and completes the assembling of large span air filling type prestressing force truss string structure.
Described in present embodiment, the design air pressure of low pressure air bag is lower, and film material material is required to reduce, and construction and maintenance requirement reduce.
If present embodiment structural span is large and exceed certain limit, the initial prestressing force of structure of setting up when inflation can not meet structural bearing capacity and rigidity requirement, when structure location and installation, need to be stretched to prestressing force design load to prestressed cable again.Now, make can stretch-draw node in the end of main stress bar rope.
Detailed description of the invention six: as shown in Figure 3 and Figure 4, present embodiment large span air filling type prestressing force truss string structure is made up of truss 1, main drag-line 2, cylindrical low interior pressure air bag 3 and backing plate 4, described truss 1 comprises upper chord 6, lower chord 7 and web member 8, and upper chord 6, lower chord 7 are passed through and are connected mutually by welding respectively with web member 8, it is upper that the left end of described upper chord 6 and lower chord 7 is fixed by welding in left welded spherical node 9 surfaces, and the right-hand member of described upper chord 6 and lower chord 7 is fixed by welding on right welded spherical node 10 surfaces, described backing plate 4 is fixed by welding in truss 1 lower edge plane, be provided with cylindrical low interior pressure air bag 3 in backing plate 4 lower ends, the external surface of described cylindrical low interior pressure air bag 3 is provided with multiple nooses, described multiple noose is connected to cylindrical low interior pressure air bag 3 external surfaces by bonding, described main drag-line 2 is spatially spiral shape through multiple nooses and is connected with cylindrical low interior pressure air bag 3, the end of described main drag-line 2 is by ground tackle and be bolted to the lateral surface of lower edge plane of truss 1, the infall of described main drag-line 2 connects by bidirectional crossed socket point.
Described in present embodiment, multiple nooses are arranged with the position of main drag-line.
Present embodiment, compared with truss-string-structure, adopts low interior pressure air bag to replace rigidity pressurized strut, has effectively avoided pressure bar stabilization problem, and has alleviated dead load; There is the low interior pressure air bag of certain rigidity for truss integral provides continuous elastomeric bearing, improved the stability of truss integral; Be that structure is applied to initial prestressed process to the gas replenishment process of air bag, without tensioning equipment, convenient and quick construction.
Present embodiment is compared with simple inflation beam, and truss of the present invention and main drag-line form couple opposing cross section moment of flexure at the upper and lower sides of low interior pressure air bag, do not exist air bag to crumple phenomenon; And the truss that belongs to rigidity system does not directly contact air-supported membrane structure with extraneous, eliminated simple air-supported membrane structure and met wind sensitive issue, has improved the resistivity to external load simultaneously.
Present embodiment is self-supporting, self equilibrium systems, and the horizontal thrust that truss produces is mainly born by main drag-line, and boundary constraint is mainly taking vertical counter-force as main.Therefore it is low that its boundary constraint requires, Bearing Seat Force is clear and definite, easily designing and making.
Present embodiment is in the time storing transport, and the shared volume of each several part member is little; On-site consolidation equipment and step are simple, and speed is fast, are not only applicable to large-span space structure, are also applicable to provisional property bridge or temporary building.
Detailed description of the invention seven: present embodiment is different from detailed description of the invention six: the material of described cylindrical low interior pressure air bag 3 is that tetrafluoroethene is without fabric substrate membrane material.Other are identical with detailed description of the invention six.
Detailed description of the invention eight: present embodiment is different from detailed description of the invention six or seven: the material of described multiple nooses is that tetrafluoroethene is without fabric substrate membrane material.Other are identical with detailed description of the invention six or seven.
Detailed description of the invention nine: present embodiment is different from one of detailed description of the invention six to eight: lighting device is set in described cylindrical low interior pressure air bag 3 inside.So arrange, meet different building functions and requirement attractive in appearance.Other are identical with one of detailed description of the invention six to eight.
Detailed description of the invention ten: the construction method of present embodiment large span air filling type prestressing force truss string structure is carried out according to the following steps:
One, first upper chord 6 and lower chord 7 are shaped by required physical dimension, then upper chord 6, lower chord 7 are passed through and are connected mutually by welding respectively with web member 8, obtain truss 1;
Two, backing plate 4 is fixed by welding in the truss 1 lower edge plane that step 1 obtains, backing plate 4 lower planes flush with lower chord 7 bottom surfaces; Backing plate 4 is with lower chord 7 contact position smooth treatment and use membrane covered;
Three, the cylindrical low interior pressure air bag 3 of factory's cutting, two ends arrange inflation and pressure tester;
Four, the cylindrical low interior pressure air bag 3 that main drag-line 2 obtains with step 3 through multiple nooses is connected, the end of main drag-line 2 is by ground tackle and be bolted to the lateral surface of lower edge plane of truss 1, the infall of main drag-line 2 connects by bidirectional crossed socket point, obtains large span air filling type prestressing force truss string structure;
Five, the two ends of large span air filling type prestressing force truss string structure are placed on support, are inflated to design air pressure to cylindrical low interior pressure air bag 3 by inflation and the pressure tester at cylindrical low interior pressure air bag 3 two ends, set up the initial prestressing force of structure;
Six, hoisted in position, bearing connects, and completes the assembling of large span air filling type prestressing force truss string structure.
Described in present embodiment, the design air pressure of low pressure air bag is lower, and film material material is required to reduce, and construction and maintenance requirement reduce.
If present embodiment structural span is large and exceed certain limit, the initial prestressing force of structure of setting up when inflation can not meet structural bearing capacity and rigidity requirement, when structure location and installation, need to be stretched to prestressing force design load to prestressed cable again.Now, make can stretch-draw node in the end of main stress bar rope.
Claims (10)
1. large span air filling type prestressing force truss string structure, is characterized in that large span air filling type prestressing force truss string structure is made up of truss (1), main drag-line (2), the low interior pressure air bag of spindle (3), backing plate (4) and multiple strop (5); Described truss (1) comprises upper chord (6), lower chord (7) and web member (8), and upper chord (6), lower chord (7) are passed through and are connected mutually by welding respectively with web member (8); The left end of described upper chord (6) and lower chord (7) is fixed by welding on left welded spherical node (9) surface, the right-hand member of described upper chord (6) and lower chord (7) is fixed by welding on right welded spherical node (10) surface, has through hole in the middle of described left welded spherical node (9) and right welded spherical node (10); Described backing plate (4) is fixed by welding in truss (1) lower edge plane, be provided with the low interior pressure air bag of spindle (3) in backing plate (4) lower end, the soffit of the low interior pressure air bag of described spindle (3) is provided with multiple horizontal nooses, vertical direction at the external surface of the low interior pressure air bag of described spindle (3) is provided with the noose group being made up of multiple vertical nooses, in the vertical direction of the external surface of the low interior pressure air bag of described spindle (3) multiple noose groups that be arranged in parallel; Described multiple horizontal noose and multiple noose group are connected to low interior pressure air bag (3) external surface by bonding, described main drag-line (2) is connected with the low interior pressure air bag of spindle (3) through multiple horizontal nooses, the left end of described main drag-line (2) is fixed in left welded spherical node (9) by ground tackle, and the right-hand member of described main drag-line (2) is fixed in right welded spherical node (10) by ground tackle; Described multiple strop (5) is connected with the low interior pressure air bag of spindle (3) through noose group respectively, and the upper end of multiple strops (5) is by ground tackle and the outer surface that is bolted to lower chord (7); Described main drag-line (2) is connected by bidirectional crossed socket point with multiple strops (5).
2. large span air filling type prestressing force truss string structure according to claim 1, the material that it is characterized in that the low interior pressure air bag of described spindle (3) is that tetrafluoroethene is without fabric substrate membrane material.
3. large span air filling type prestressing force truss string structure according to claim 1, the material that it is characterized in that described multiple horizontal nooses and multiple vertical nooses is that tetrafluoroethene is without fabric substrate membrane material.
4. large span air filling type prestressing force truss string structure according to claim 1, is characterized in that, in the low interior pressure air bag of described spindle (3) inside, lighting device is set.
5. the construction method of large span air filling type prestressing force truss string structure as claimed in claim 1, is characterized in that the construction method of large span air filling type prestressing force truss string structure is carried out according to the following steps:
One, first upper chord (6) and lower chord (7) are shaped by required physical dimension, then upper chord (6), lower chord (7) are passed through and are connected mutually by welding respectively with web member (8), obtain truss (1);
Two, backing plate (4) is fixed by welding in truss (1) the lower edge plane that step 1 obtains, backing plate (4) lower plane flushes with lower chord (7) bottom surface; Backing plate (4) is with lower chord (7) contact position smooth treatment and use membrane covered;
Three, the low interior pressure air bag of factory's cutting spindle (3), two ends arrange inflation and pressure tester;
Four, the low interior pressure air bag of spindle (3) that main drag-line (2) obtains with step 3 through multiple horizontal nooses is connected, the through hole of the left welded spherical node (9) of the truss (1) that the left end of main drag-line (2) is obtained through step 1 is also fixed by crab-bolt, the right-hand member of main drag-line (2) is fixed through the through hole of the right welded spherical node (10) of truss (1) and by crab-bolt, multiple strops (5) are connected with the low interior pressure air bag of spindle (3) through noose group respectively, the upper end of multiple strops (5) is by ground tackle and the outer surface that is bolted to lower chord (7), be connected with multiple strops (5) by the bidirectional crossed socket main drag-line (2) of naming a person for a particular job, obtain large span air filling type prestressing force truss string structure,
Five, the two ends of large span air filling type prestressing force truss string structure are placed on support, inflation and pressure tester by the low interior pressure air bag of spindle (3) two ends are inflated to design air pressure to the low interior pressure air bag of spindle (3), set up the initial prestressing force of structure;
Six, hoisted in position, bearing connects, and completes the assembling of large span air filling type prestressing force truss string structure.
6. large span air filling type prestressing force truss string structure, is characterized in that large span air filling type prestressing force truss string structure is made up of truss (1), main drag-line (2), cylindrical low interior pressure air bag (3) and backing plate (4), described truss (1) comprises upper chord (6), lower chord (7) and web member (8), and upper chord (6), lower chord (7) are passed through and are connected mutually by welding respectively with web member (8), the left end of described upper chord (6) and lower chord (7) is fixed by welding on left welded spherical node (9) surface, and the right-hand member of described upper chord (6) and lower chord (7) is fixed by welding on right welded spherical node (10) surface, described backing plate (4) is fixed by welding in truss (1) lower edge plane, be provided with cylindrical low interior pressure air bag (3) in backing plate (4) lower end, the external surface of described cylindrical low interior pressure air bag (3) is provided with multiple nooses, described multiple noose is connected to cylindrical low interior pressure air bag (3) external surface by bonding, described main drag-line (2) is spatially spiral shape through multiple nooses and is connected with cylindrical low interior pressure air bag (3), the end of described main drag-line (2) is by ground tackle and be bolted to the lateral surface of lower edge plane of truss (1), the infall of described main drag-line (2) connects by bidirectional crossed socket point.
7. large span air filling type prestressing force truss string structure according to claim 6, the material that it is characterized in that described cylindrical low interior pressure air bag (3) is that tetrafluoroethene is without fabric substrate membrane material.
8. large span air filling type prestressing force truss string structure according to claim 6, the material that it is characterized in that described multiple nooses is that tetrafluoroethene is without fabric substrate membrane material.
9. large span air filling type prestressing force truss string structure according to claim 6, is characterized in that, in described cylindrical low interior pressure air bag (3) inside, lighting device is set.
10. the construction method of large span air filling type prestressing force truss string structure as claimed in claim 6, is characterized in that the construction method of large span air filling type prestressing force truss string structure is carried out according to the following steps:
One, first upper chord (6) and lower chord (7) are shaped by required physical dimension, then upper chord (6), lower chord (7) are passed through and are connected mutually by welding respectively with web member (8), obtain truss (1);
Two, backing plate (4) is fixed by welding in truss (1) the lower edge plane that step 1 obtains, backing plate (4) lower plane flushes with lower chord (7) bottom surface; Backing plate (4) is with lower chord (7) contact position smooth treatment and use membrane covered;
Three, the cylindrical low interior pressure air bag of factory's cutting (3), two ends arrange inflation and pressure tester;
Four, the cylindrical low interior pressure air bag (3) that main drag-line (2) obtains with step 3 through multiple nooses is connected, the end of main drag-line (2) is by ground tackle and be bolted to the lateral surface of lower edge plane of truss (1), the infall of main drag-line (2) connects by bidirectional crossed socket point, obtains large span air filling type prestressing force truss string structure;
Five, the two ends of large span air filling type prestressing force truss string structure are placed on support, inflation and pressure tester by cylindrical low interior pressure air bag (3) two ends are inflated to design air pressure to cylindrical low interior pressure air bag (3), set up the initial prestressing force of structure;
Six, hoisted in position, bearing connects, and completes the assembling of large span air filling type prestressing force truss string structure.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104746938A (en) * | 2015-03-25 | 2015-07-01 | 东南大学 | Inflatable cable membrane truss structure capable of being folded and unfolded |
| CN104763052A (en) * | 2015-03-25 | 2015-07-08 | 东南大学 | Foldable and unfoldable cable membrane truss structure |
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| CN108625530A (en) * | 2018-06-26 | 2018-10-09 | 上海天华建筑设计有限公司 | Tension string beam structure and its construction method |
| CN109826488A (en) * | 2019-01-17 | 2019-05-31 | 上海海事大学 | A kind of gas support beam for large-span space structure |
| CN110206366A (en) * | 2019-06-04 | 2019-09-06 | 中国航空规划设计研究总院有限公司 | A kind of arch large-span prestressed steel structure and its construction method |
| CN110685472A (en) * | 2019-09-30 | 2020-01-14 | 深圳市万景纪旅游发展有限公司 | Artificial floating island |
| CN111535491A (en) * | 2020-05-15 | 2020-08-14 | 哈尔滨工业大学 | Suspended roof for stadium reconstruction and roof construction method |
| CN112144663A (en) * | 2020-09-24 | 2020-12-29 | 黑龙江省琼冰建筑设计有限公司 | Construction method of large-span composite ice shell structure |
| CN112411758A (en) * | 2020-10-28 | 2021-02-26 | 上海宝冶工程技术有限公司 | Three-section one-line quick installation method for truss string structure of large-span pipe |
| CN113565214A (en) * | 2021-09-26 | 2021-10-29 | 华北科技学院 | Rapid Assembly's emergent engineering is with string cable membrane steel construction building system |
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| CN104763052A (en) * | 2015-03-25 | 2015-07-08 | 东南大学 | Foldable and unfoldable cable membrane truss structure |
| CN104746938B (en) * | 2015-03-25 | 2017-01-18 | 东南大学 | Inflatable cable membrane truss structure capable of being folded and unfolded |
| CN104746938A (en) * | 2015-03-25 | 2015-07-01 | 东南大学 | Inflatable cable membrane truss structure capable of being folded and unfolded |
| CN105756196A (en) * | 2016-04-27 | 2016-07-13 | 北京首钢国际工程技术有限公司 | Device for ensuring pure pressing rod or pure tensioning rod serving as upper chord of support net rack in membrane structure |
| CN106400671A (en) * | 2016-11-25 | 2017-02-15 | 淮阴工学院 | Tensioned air bag structure composite bridge |
| CN106677427A (en) * | 2016-12-27 | 2017-05-17 | 西北工业大学 | Rigid wall airbag pressure-bearing eccentric compression rod piece |
| CN106677427B (en) * | 2016-12-27 | 2018-11-16 | 西北工业大学 | A kind of rigid wall air bearing eccentrically compressed member |
| CN108625530B (en) * | 2018-06-26 | 2024-01-19 | 上海天华建筑设计有限公司 | Beam string structure and construction method thereof |
| CN108625530A (en) * | 2018-06-26 | 2018-10-09 | 上海天华建筑设计有限公司 | Tension string beam structure and its construction method |
| CN109826488A (en) * | 2019-01-17 | 2019-05-31 | 上海海事大学 | A kind of gas support beam for large-span space structure |
| CN110206366A (en) * | 2019-06-04 | 2019-09-06 | 中国航空规划设计研究总院有限公司 | A kind of arch large-span prestressed steel structure and its construction method |
| CN110685472A (en) * | 2019-09-30 | 2020-01-14 | 深圳市万景纪旅游发展有限公司 | Artificial floating island |
| CN111535491A (en) * | 2020-05-15 | 2020-08-14 | 哈尔滨工业大学 | Suspended roof for stadium reconstruction and roof construction method |
| CN112144663A (en) * | 2020-09-24 | 2020-12-29 | 黑龙江省琼冰建筑设计有限公司 | Construction method of large-span composite ice shell structure |
| CN112411758A (en) * | 2020-10-28 | 2021-02-26 | 上海宝冶工程技术有限公司 | Three-section one-line quick installation method for truss string structure of large-span pipe |
| CN113565214A (en) * | 2021-09-26 | 2021-10-29 | 华北科技学院 | Rapid Assembly's emergent engineering is with string cable membrane steel construction building system |
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