CN116397932A

CN116397932A - Stabilizing tool for lower-bearing type plane truss and construction method

Info

Publication number: CN116397932A
Application number: CN202310171536.9A
Authority: CN
Inventors: 马滔; 刘艳华; 杨健; 尹强; 孟亮
Original assignee: China Construction Fifth Bureau Third Construction Co Ltd
Current assignee: China Construction Fifth Bureau Third Construction Co Ltd
Priority date: 2023-02-13
Filing date: 2023-02-13
Publication date: 2023-07-07

Abstract

The utility model provides a lower-bearing type stabilizing tool for plane truss and a construction method, includes the first articulated support of symmetry fixing on truss upper chord both sides, fixes first staple bolt, second staple bolt on the stand and the triangle support piece of connecting first articulated support, first staple bolt and second staple bolt, triangle support piece is three piece one end interconnect's member, and the other end of three piece articulates with first articulated support, first staple bolt and second staple bolt respectively and forms triangle-shaped bearing structure. The invention temporarily fixes the plane truss, reduces the time for positioning the hoisting machinery, improves the installation efficiency and reduces the engineering construction cost.

Description

Stabilizing tool for lower-bearing type plane truss and construction method

Technical Field

The invention relates to a stabilizing tool for a lower-bearing type plane truss and a construction method.

Background

With the continuous acceleration of modern industrialization and urbanization, the development of buildings is toward the directions of larger span and more complex body types. The construction method comprises the steps that more and more large-span large-space buildings such as factory buildings, gymnasiums and exhibition halls are required to be constructed, truss structures in the large-span large-space buildings are wide in application, the existing truss forms are rich and various, construction ideas and methods are also various, and when a 'lower-bearing type spherical hinge plane truss' is installed, the bottom of the plane truss is supported at the top of a stand column through a spherical hinge support, the plane truss is movably connected with the top of the stand column, so that in the installation process, a crane is usually used for hoisting the plane truss to a corresponding position, a secondary beam or a secondary truss is connected with the plane truss in a state that the plane truss is not loose, and after the secondary beam or the secondary truss is installed with the plane truss to form a stable structure, the crane is loose with the plane truss, and then hoisting of the next truss is carried out. However, this method has obvious drawbacks: 1) The crane needs to be loosened after the secondary beam or the secondary truss is installed, the occupied time of the crane is long, the installation efficiency is low, and the construction cost is high; 2) The plane truss and the secondary beam or the secondary truss are synchronously constructed, and the machinery is subjected to centralized cross operation, so that a great potential safety hazard exists.

Disclosure of Invention

In order to achieve the above purpose, the invention provides a stable fixture for a downward-supporting type plane truss and a construction method thereof, wherein the stable fixture is used for temporarily fixing the plane truss, reduces the positioning time of a hoisting machine, improves the installation efficiency and reduces the engineering construction cost.

The invention relates to a stabilizing tool for a lower-bearing type plane truss, which comprises a first hinged support, a first hoop, a second hoop and a triangular support, wherein the first hinged support and the first hoop are symmetrically fixed on two sides of an upper chord of the truss, the first hoop and the second hoop are fixed on an upright post, the triangular support is formed by connecting the first hinged support, the first hoop and the second hoop, the triangular support is a rod piece with three ends connected with each other, and the other ends of the three rod pieces are hinged with the first hinged support, the first hoop and the second hoop respectively to form a triangular support structure.

By adopting the structure, the triangular support structure and the anchor ear are utilized to form a temporary support structure, so that two sides of the truss are supported, after the temporary support structure is established, the crane can be unhooked, the stability of the truss on the upright post is ensured through the temporary support structure, the utilization efficiency of the crane is improved, and meanwhile, the installation of a subsequent secondary beam or secondary truss is facilitated.

In this embodiment, the first staple bolt sets up the upside at the second staple bolt, on the both sides of first staple bolt and second staple bolt, be provided with second articulated support and third articulated support respectively in the position that corresponds with first articulated support.

In this embodiment, the triangle support piece symmetry is laid in the both sides of truss, the triangle support piece includes diagonal bracing, middle bracing piece and diagonal bracing piece down, the one end of diagonal bracing piece, middle bracing piece and diagonal bracing piece down is in the same place through the round pin axle articulates, the other end of diagonal bracing piece articulates on first articulated support, the other end of middle bracing piece articulates on second articulated support, the other end of diagonal bracing piece articulates on third articulated support down. One end of the upper inclined support rod, one end of the middle support rod and one end of the lower inclined support rod can rotate around the pin shaft, and the other end of the upper inclined support rod, the middle support rod and the lower inclined support rod can rotate around the first hinge support, the second hinge support and the third hinge support respectively. The first anchor ear and the second anchor ear provide reliable impetus for middle bracing piece and lower inclined strut respectively, and middle bracing piece and lower inclined strut pass through first, second anchor ear and stand formation lower part stable structure, and the truss passes through upper inclined strut and lower part stable structure and is connected, reaches the purpose of fixed truss, and the triangle support member can formulate the triangle support member of different fixed length specifications, through the combination of upper inclined strut, middle bracing piece and the inclined strut of different length specifications, adjusts the interval between the anchor ear simultaneously, makes the device adapt to different size trusses.

In this embodiment, the upper diagonal brace, the middle diagonal brace, and the lower diagonal brace are detachably connected to the first, second, and third hinge supports.

In this embodiment, the slenderness ratio of the upper diagonal brace, the middle diagonal brace and the lower diagonal brace is less than 200.

In this embodiment, the structure of first staple bolt and second staple bolt is the same all includes two semicircle type hoop boards, and the internal diameter of semicircle type hoop board and the size phase-match of stand, the inner wall of semicircle type hoop board is equipped with the skid resistant course, the both ends of semicircle type hoop board all are equipped with the engaging lug, are equipped with a plurality of bolt holes on the engaging lug, and the locking is realized through the staple bolt that passes the bolt hole at the both ends of two semicircle type hoop boards.

In this embodiment, a reinforcing rib is further disposed between the connecting lug and the semicircular hoop plate. The reinforcing ribs improve the strength of the connecting lugs.

The invention also comprises a construction method of the lower-bearing type plane truss, which comprises the following steps of,

a. and (3) selecting a rod piece:

the length L1 of the upper inclined support rod, the length L2 of the middle support rod and the length L3 of the lower inclined support rod are determined according to the height H1 of the truss, the principle is that the lengths of the upper inclined support rod and the lower inclined support rod are 1.2-1.6 times of the height H1 of the truss, and the length of the middle support rod is matched with the height of the truss;

b. and (3) selecting the positions of the hoops:

setting the top of the top flush upright post of the first anchor ear, and determining the distance H2 between the first anchor ear and the second anchor ear according to the length L1 of the upper inclined support rod, the length L2 of the middle support rod, the length L3 of the lower inclined support rod and the horizontal interval L4 between the first hinged support and the second hinged support of the first anchor ear on the truss;

c. and (3) hoop installation:

the first anchor ear and the second anchor ear are arranged at the corresponding positions of the upright posts;

d. middle support rod and declining support rod installation:

the middle supporting rod is hinged with one end of the lower inclined supporting rod, the other end of the middle supporting rod is hinged with the first hoop, and the other end of the lower inclined supporting rod is hinged with the second hoop by utilizing a pin shaft;

e. hoisting the truss in place:

hoisting the truss, so that the truss is supported at the top of the upright post through the spherical hinge support saddle, and the hoisting steel wire rope is kept to bear load;

f. and (3) installing an upper oblique support rod:

one end of an upper inclined support rod is hinged with a first hinged support on the truss, and the other end of the upper inclined support rod is hinged with the hinged end of a middle support rod and a lower inclined support rod;

g. unloading the hoisting steel wire rope;

h. unloading the reinforcing device:

after the main structure is installed, the truss, the upper inclined support rod, the first anchor ear, the middle support rod, the second anchor ear and the lower inclined support rod are sequentially removed, and finally the first anchor ear and the second anchor ear are removed.

Compared with the prior art, the invention has the following beneficial effects:

1. the device provides out-of-plane support for the truss after the truss is hoisted in place, and can prevent the problem of dumping after the truss is hoisted in place.

2. The crane occupation time during truss installation is greatly reduced, the construction of the follow-up secondary beam or secondary truss is facilitated, and the installation efficiency is improved.

3. The device is used for temporary fixation, flexible in operation, detachable, reusable, economical and practical.

In summary, the device can solve the stability problem when the plane truss is installed in place, reduce the time of the hoisting machinery in place, effectively avoid the safety problem of centralized cross operation of the hoisting machinery, improve the installation efficiency, ensure that the device is detachable, flexible in application, reusable and reduce the engineering construction cost.

Drawings

FIG. 1 is a perspective view of a planar truss supported on columns in accordance with the present invention;

FIG. 2 is a front view of the present invention supporting a planar truss on a column;

FIG. 3 is a perspective view of the invention mounted on a column;

FIG. 4 is an assembled schematic view of the triangular support of the present invention;

FIG. 5 is a first construction process diagram of the present invention;

FIG. 6 is a second construction process diagram of the present invention;

fig. 7 is a construction process diagram of the present invention.

Wherein: 1. the first hoop; 2. the second hoop; 3. a middle support rod; 4. an upper inclined support rod; 5. a lower inclined support rod; 61. a first hinge support; 62. the second hinged support; 63. a third articulation support; 7. a connecting piece; 71. a connecting lug; 72. hoop bolts; 73. reinforcing ribs; 8. a column; 9. truss; 10. and the spherical hinge support is provided with a spherical hinge support.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.

As shown in fig. 1 to 4, the invention provides a stabilizing fixture for a lower-bearing type plane truss, which comprises a first hinged support 61 symmetrically fixed on two sides of an upper chord of the truss 9, a first hoop 1 and a second hoop 2 fixed on a stand column 8, and a triangular support piece for supporting and fixing the first hinged support 61 on the first hoop 1 and the second hoop 2,

the first anchor ear 1 is arranged on the upper side of the second anchor ear 2, and a second hinged support 62 and a third hinged support 63 are respectively arranged on two sides of the first anchor ear 1 and the second anchor ear 2 at positions corresponding to the first hinged support 61;

the triangular supporting pieces are symmetrically arranged on two sides of the truss 9, each triangular supporting piece comprises an upper inclined supporting rod 4, a middle supporting rod 3 and a lower inclined supporting rod 5, one ends of the upper inclined supporting rod 4, the middle supporting rod 3 and the lower inclined supporting rod 5 are hinged together through pin shafts, the other ends of the upper inclined supporting rods 4 are hinged to a first hinged support 61, the other ends of the middle supporting rods 3 are hinged to a second hinged support 62, and the other ends of the lower inclined supporting rods 5 are hinged to a third hinged support 63; one end of the upper inclined support rod 4, the middle support rod 3 and the lower inclined support rod 5 can rotate around the pin shaft, and the other end of the upper inclined support rod can rotate around the first, the second and the third hinging supports respectively;

the upper inclined support rod 4, the middle support rod 3 and the lower inclined support rod 5 are detachably connected with the first hinge support, the second hinge support and the third hinge support, the upper inclined support rod 4, the middle support rod 3 and the lower inclined support rod 5 are all located on the same plane, the slenderness ratio of the upper inclined support rod 4, the middle support rod 3 and the lower inclined support rod 5 is smaller than 200, the first anchor ear 1 and the second anchor ear 2 respectively provide reliable force points for the middle support rod 3 and the lower inclined support rod 5, the middle support rod 3 and the lower inclined support rod 5 form a lower stable structure through the first anchor ear and the second anchor ear and the upright post 8, the truss 9 is connected with the lower stable structure through the upper inclined support rod 4, the purpose of fixing the truss 9 is achieved, triangular support pieces can formulate triangular support rod pieces with different fixed length specifications, and the interval between the anchor ears is adjusted through the upper inclined support rod 4, the middle support rod 3 and the lower inclined support rod 5 of different length specifications, so that the device is suitable for trusses 9 with different sizes.

The first anchor ear 1 and the same including two semicircle type hoop boards of structure of second anchor ear 2, the internal diameter of semicircle type hoop board and the big or small phase-match of stand 8, the inner wall of semicircle type hoop board is equipped with the skid resistant course, the both ends of semicircle type hoop board all are equipped with engaging lug 71, are equipped with a plurality of bolt holes on the engaging lug 71, and the locking is realized through the anchor ear bolt 72 that passes the bolt hole in both ends of two semicircle type hoop boards, still be equipped with strengthening rib 73 between engaging lug 71 and the semicircle type hoop board, strengthening rib 73 improves the intensity of engaging lug 71.

As shown in fig. 5 to 7, the invention is applicable to a lower-bearing type plane truss, and the process steps in actual construction are as follows:

the first step: and (3) selecting a rod piece:

as shown in fig. 2, the length L1 of the upper diagonal brace 4, the length L2 of the middle diagonal brace 3 and the length L3 of the lower diagonal brace 5 are determined according to the height of the truss 9, and the principle of selection is that the lengths of the upper diagonal brace 4 and the lower diagonal brace 5 are 1.2-1.6 times, preferably 1.5 times, the height of the truss 9, and the length of the middle diagonal brace 3 is matched with the height of the truss 9;

and a second step of: and (3) selecting the positions of the hoops:

as shown in fig. 3, the position of the first hoop 1 is determined by design, and the distance H2 between the first hoop 1 and the second hoop 2 is determined according to the upper diagonal brace 4L1, the middle diagonal brace 3L2, the lower diagonal brace 5L3 and the spacing L4 between the first hinged support 61 and the second hinged support 62 of the truss 9 selected in the first step;

and a third step of: and (3) hoop installation:

as shown in fig. 5, according to the determined anchor ear positions, a first anchor ear 1 and a second anchor ear 2 are installed at corresponding positions of the upright post 8;

fourth step: the middle supporting rod 3 and the lower inclined supporting rod 5 are arranged:

as shown in fig. 6, the middle support rod 3 and the lower inclined support rod 5, the middle support rod 3 and the first hoop 1, and the lower inclined support rod 5 and the second hoop 2 are connected with each other in sequence by using a pin shaft to form a lower stable structure.

Fifth step: hoisting the plane truss 9 in place:

hoisting the truss 9, so that the truss 9 is supported at the top of the upright post 8 through the spherical hinge support 10, and the hoisting steel wire rope in the state bears load;

sixth step: the upper oblique support rod 4 is installed:

after the truss 9 is hoisted in place, the upper inclined support rod 4 is connected with the side surface of the plane truss 9, the installation of the reinforcing device is completed, and the plane truss 9 is laterally restrained in the state;

seventh step: unloading the hoisting steel wire rope:

and the reinforcing device is installed, the plane truss 9 is stabilized out of the plane, and the hoisting steel wire rope is unloaded.

Eighth step: unloading the reinforcing device:

after the installation of the main structure is completed, the truss 9, the upper inclined support rod 4, the first anchor ear 1, the middle support rod 3, the second anchor ear 2 and the lower inclined support rod 5 are sequentially removed, the first anchor ear 1 and the second anchor ear 2 are finally removed, the corresponding components are reassembled to the positions of other plane trusses 9 to be installed, and the subsequent operation can be completed according to the steps.

The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather utilizing equivalent structural changes made in the present invention description and drawings or directly/indirectly applied to other related technical fields are included in the scope of the present invention.

Claims

1. The utility model provides a down hold formula plane truss with stable frock which characterized in that: including the symmetry fix on truss string both sides first articulated support, fix first staple bolt, second staple bolt on the stand and with the triangle support piece that first articulated support, first staple bolt and second staple bolt are connected, triangle support piece is three one end interconnect's member, and the other end of three member articulates with first articulated support, first staple bolt and second staple bolt respectively and forms triangle-shaped bearing structure.

2. The stabilizing fixture for a underpinning type plane truss of claim 1, wherein: the first anchor ear is arranged on the upper side of the second anchor ear, and the second hinge support and the third hinge support are respectively arranged on the two sides of the first anchor ear and the second anchor ear at positions corresponding to the first hinge support.

3. The stabilizing fixture for a underpinning type plane truss as claimed in claim 2, wherein: the triangular support piece is symmetrically arranged on two sides of the truss, the triangular support piece comprises an upper inclined support rod, a middle support rod and a lower inclined support rod, one ends of the upper inclined support rod, the middle support rod and the lower inclined support rod are hinged together through a pin shaft, the other end of the upper inclined support rod is hinged to a first hinged support, the other end of the middle support rod is hinged to a second hinged support, and the other end of the lower inclined support rod is hinged to a third hinged support.

4. The stabilizing fixture for a underpinning type plane truss of claim 3, wherein: the upper inclined support rod, the middle support rod and the lower inclined support rod are detachably connected with the first, second and third hinged supports.

5. The stabilizing fixture for a underpinning type plane truss of claim 3, wherein: the slenderness ratio of the upper inclined supporting rod, the middle supporting rod and the lower inclined supporting rod is less than 200.

6. The stabilizing fixture for a underpinning type plane truss according to any one of claims 1 to 5, wherein: the structure of the first anchor ear and the second anchor ear is the same and comprises two semicircular hoop plates, the inner diameter of each semicircular hoop plate is matched with the size of the upright post, an anti-slip layer is arranged on the inner wall of each semicircular hoop plate, connecting lugs are arranged at the two ends of each semicircular hoop plate, a plurality of bolt holes are formed in the connecting lugs, and locking is achieved at the two ends of each semicircular hoop plate through anchor ear bolts penetrating through the bolt holes.

7. The stabilizing fixture for a underpinning type plane truss of claim 6, wherein: and a reinforcing rib is further arranged between the connecting lug and the semicircular hoop plate.

8. A method for constructing a lower-bearing type planar truss, which is characterized by using the stabilizing tool for the lower-bearing type planar truss as set forth in claim 6 or 7, and comprising the following steps: specifically comprises the following steps of,