CN101629456A - Three-dimensional steel truss assembling support frame shaped like a Chinese character qie and construction method for assembling steel truss - Google Patents
Three-dimensional steel truss assembling support frame shaped like a Chinese character qie and construction method for assembling steel truss Download PDFInfo
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- CN101629456A CN101629456A CN200910305737A CN200910305737A CN101629456A CN 101629456 A CN101629456 A CN 101629456A CN 200910305737 A CN200910305737 A CN 200910305737A CN 200910305737 A CN200910305737 A CN 200910305737A CN 101629456 A CN101629456 A CN 101629456A
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Abstract
The invention relates to a three-dimensional steel truss assembling support frame shaped like a Chinese character qie and a construction method for assembling the steel truss. The three-dimensional support frame shapes like a Chinese character qie and comprises two pairs of upright posts at the front and rear parts, two lower-boom jig-frame rods, two upper-boom trimmers, an operating platform and a pull rod, wherein the two lower-boom jig-frame rods are respectively arranged in parallel at the root parts of the two pairs of upright posts; the two upper-boom trimmers are respectively arranged in parallel at the top parts of the two pairs of upright posts; the operating platform is connected between the two upper-boom trimmers; the pull rod is connected between the two pairs of upright posts at the front and rear parts; locating holes are arranged in the middle part of the operating platform; and the edge of the locating hole is connected with a locating block for controlling the axle position of the steel truss. The technique for assembling the supporting the steel truss solves the problem of high-altitude location and assembly of the steel member, provides a more safe and reliable assembling platform for operators during high-altitude operation, and is widely applied in the field of assembling steel structures.
Description
Technical field
The present invention relates to a kind of bracing frame and steel truss assembling and construction method thereof of construction steel structure assembly unit engineering.
Background technology
The steel truss assembly unit of winding up belongs to work high above the ground, and work progress high and medium location assembly unit difficulty is big, and construction technology mainly is by setting up A-frame (seeing accompanying drawing 1), wind up by many covers A-frame sub-truss, the auxiliary girder location at present; But because A-frame is a two-dimensional structure, self stability is poor, so need drawknot between support and the support, to guarantee to form stabilization element, set spacing can not be excessive simultaneously, otherwise unstability appears in pull bar between support easily; This has increased the steel using amount in the engineering undoubtedly, has increased the difficulty of construction of engineering, has increased the construction cost of engineering.
Summary of the invention
Invention provides a kind of solid and formula steel truss assembly unit bracing frame, solve existing bracing frame instability, and the engineering steel amount is big, the technical problem of working security difference.
The technical solution adopted for the present invention to solve the technical problems is:
This solid and formula steel truss assembly unit bracing frame, it is characterized in that: this bracing frame is solid and font structure, the two pairs of vertical rods before and after comprising, be connected to the parallel and lower edge moulding bed bar put of two of two column roots, be connected to the parallel and joist that winds up put of two of two column tops, be connected in two wind up between the joist operating platform and be connected in pull bar between the two pairs of vertical rods in front and back, described operating platform middle part has locating hole, and the edge of locating hole is connected with the locating piece that is used to control the steel truss axial location.
Above-mentioned locating piece can be positioned at the middle part of the joist that winds up, and two wind up the locating piece of four symmetries on the joist.
About the aforesaid operations platform can be divided into two, two operating platforms laterally are connected the column outside respectively.
A pull bar can respectively be arranged at middle part and top between the two pairs of vertical rods in above-mentioned front and back.
Lower edge moulding bed bar, the joist that winds up, vertical rod and pull bar can be H shaped steel or i iron.
The steel truss assembling and construction method of this application solid and formula steel truss assembly unit bracing frame is characterized in that construction sequence is as follows:
Step 1: the lower edge moulding bed bar of arranging bracing frame at two banjo fixing butt jointing positions of steel truss;
Step 2: after lower edge moulding bed bar deploys, lifting steel truss lower chord;
Step 3: the steel truss lower chord installs, and lifting is the joist that winds up of steel truss fixedly, the assembly unit bracing frame;
Step 4: the lifting of a Pin steel truss upper chord and steel truss web member, upper chord becomes whole back hoisted in position with its straight web member at installation on ground, the constructor is in place by the auxiliary steel truss upper chord of the operating platform at bracing frame top, by locating piece control installation accuracy.After steel truss was in place, member can break off relations;
Step 5: the lifting of the 2nd Pin steel truss upper chord and web member, upper chord becomes whole back hoisted in position with its straight web member at installation on ground;
Step 6: the 3rd Pin steel truss lifting, an end is connected with truss, and an end is pulled wind and is fixed by leading the chain drawknot;
Step 7: install by expansion around the middle mind-set, require the pre-arch camber value of panel point is checked, guarantee the installation accuracy of postorder.
Beneficial effect of the present invention is as follows:
And formula bracing frame shape such as its word by the moulding of several shaped steel assembly weldings, are arranged in the butt joint node place of structure, can adjust rod member height and cross section specification according to the height and the weight of structure.The constructor controls installation accuracy by locating piece, winds up in place by the auxiliary steel truss of the operating platform at moulding bed top.After steel truss was in place, member can break off relations, and had improved the efficient of lifting operation; Especially hang time manyly in structure, under the few situation of hanging device, and formula steel truss assembly unit support technology can improve the lifting efficient of loop wheel machine greatly, satisfies daily demand of hanging time.Because bracing frame is a three-dimensional structure, so its stability will be higher than the A-frame of two-dimensional structure far away; Each bracing frame itself is exactly a stable cell cube, satisfies in rod member rigidity under the condition of self amount of deflection, only arranges in joint, rod member two ends to get final product.Save rolled steel dosage to greatest extent, controlled the construction cost of engineering, and be easy to construction.
And formula steel truss assembly unit support technology has solved location, steel member high-altitude, packing problem, provides a more safe and reliable platform for lining for the constructor in work high above the ground simultaneously.Can be widely used in the steel structure assembling construction field.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of existing triangular support bracket.
Fig. 2 is a structural representation of the present invention.
Fig. 3 is the schematic diagram of construction sequence one, step 2.
Fig. 4 is the schematic diagram of construction sequence three.
Fig. 5 is the schematic diagram of construction sequence four, step 5.
Fig. 6 is the schematic diagram of construction sequence six.
Fig. 7 is the schematic diagram of construction sequence seven.
Reference numeral: 1-vertical rod, 2-lower edge moulding bed bar, 3-locating piece, 4-wind up joist, 5-operating platform, 6-pull bar, 7 bracing frames, 8 steel truss lower chords, 9 steel truss upper chords, 10 steel truss web members.
The specific embodiment
Embodiment is referring to shown in Figure 2, this solid and formula steel truss assembly unit bracing frame, this bracing frame is solid and font structure, the two pairs of vertical rods 1 before and after comprising, be connected to the parallel and lower edge moulding bed bar 2 put of two of two column roots, be connected to the parallel and joist 4 that winds up put of two of two column tops, be connected in two wind up between the joist 4 operating platform 5 and be connected in pull bar 6 between the two pairs of vertical rods in front and back, a pull bar 6 is respectively arranged at middle part and top between the two pairs of vertical rods 1 in front and back.About operating platform is divided into two, two operating platforms laterally are connected the column outside respectively.Operating platform middle part has locating hole, and the edge of locating hole is connected with the locating piece 3 that is used to control the steel truss axial location, and locating piece 3 is positioned at the middle part of the joist 4 that winds up, and two wind up the locating piece 3 of four symmetries on the joist 4.
Lower edge moulding bed bar 2, the joist 4 that winds up, vertical rod 1 and pull bar 6 are H shaped steel or i iron.
Adopt steel truss assembling construction process of the present invention as follows:
Step 1: the lower edge moulding bed bar 2 of arranging bracing frame 7 at two banjo fixing butt jointing positions of steel truss;
Step 2: after lower edge moulding bed bar 2 deployed, lifting steel truss lower chord 8 was referring to shown in Figure 3;
Step 3: the steel truss lower chord installs, and lifting is the joist that winds up of steel truss fixedly, and the assembly unit bracing frame is referring to shown in Figure 4;
Step 4: the lifting of a Pin steel truss upper chord 9 and steel truss web member 10, upper chord becomes whole back hoisted in position with its straight web member at installation on ground, the constructor is in place by the operating platform 5 auxiliary steel truss upper chords at bracing frame top, by locating piece 3 control installation accuracies.After steel truss was in place, member can break off relations; Referring to shown in Figure 5;
Step 5: the lifting of the 2nd Pin steel truss upper chord and web member, upper chord becomes whole back hoisted in position with its straight web member at installation on ground;
Step 6: the 3rd Pin steel truss lifting, an end is connected with truss, and an end is pulled wind and is fixed by leading the chain drawknot; Referring to shown in Figure 6.
Step 7: install by expansion around the middle mind-set, require the pre-arch camber value of panel point is checked, guarantee the installation accuracy of postorder, referring to shown in Figure 7.
Claims (6)
1. solid and formula steel truss assembly unit bracing frame, it is characterized in that: this bracing frame is solid and font structure, two pairs of vertical rods (1) before and after comprising, be connected to the parallel and lower edge moulding bed bar (2) put of two of two column roots, be connected to the parallel and joist that winds up (4) put of two of two column tops, be connected in the operating platform (5) between two joists that wind up (4) and be connected in pull bar (6) between the two pairs of vertical rods in front and back, described operating platform middle part has locating hole, and the edge of locating hole is connected with the locating piece (3) that is used to control the steel truss axial location.
2. solid according to claim 1 and formula steel truss assembly unit bracing frame, it is characterized in that: above-mentioned locating piece (3) is positioned at the middle part of the joist that winds up (4), and two wind up the locating piece (3) of four symmetries on the joist (4)
3. solid according to claim 1 and formula steel truss assembly unit bracing frame is characterized in that: about the aforesaid operations platform is divided into two, two operating platforms laterally are connected the column outside respectively.
4. solid according to claim 1 and formula steel truss assembly unit bracing frame, it is characterized in that: a pull bar (6) is respectively arranged at middle part between the two pairs of vertical rods in above-mentioned front and back (1) and top.
5. solid according to claim 1 and formula steel truss assembly unit bracing frame is characterized in that: lower edge moulding bed bar (2), the joist that winds up (4), vertical rod (1) and pull bar (6) are H shaped steel or i iron.
6. steel truss assembling and construction method of using solid and formula steel truss assembly unit bracing frame is characterized in that construction sequence is as follows:
Step 1: the lower edge moulding bed bar (2) of arranging bracing frame (7) at two banjo fixing butt jointing positions of steel truss;
Step 2: after lower edge moulding bed bar (2) deploys, lifting steel truss lower chord (8);
Step 3: the steel truss lower chord installs, and lifting is the joist that winds up of steel truss fixedly, the assembly unit bracing frame;
Step 4: the lifting of a Pin steel truss upper chord (9) and steel truss web member (10), upper chord becomes whole back hoisted in position with its straight web member at installation on ground, the constructor is in place by the auxiliary steel truss upper chord of the operating platform (5) at bracing frame top, by locating piece (3) control installation accuracy.After steel truss was in place, member can break off relations;
Step 5: the lifting of the 2nd Pin steel truss upper chord and web member, upper chord becomes whole back hoisted in position with its straight web member at installation on ground;
Step 6: the 3rd Pin steel truss lifting, an end is connected with truss, and an end is pulled wind and is fixed by leading the chain drawknot;
Step 7: install by expansion around the middle mind-set, require the pre-arch camber value of panel point is checked, guarantee the installation accuracy of postorder.
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CN111779286A (en) * | 2020-07-24 | 2020-10-16 | 中冶建工集团重庆钢结构有限公司 | Construction method for assembling planar truss on site |
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