CN113585480A - Construction method for assembled double T-shaped plates of ridge plate of outer wrapping type lower chord member - Google Patents
Construction method for assembled double T-shaped plates of ridge plate of outer wrapping type lower chord member Download PDFInfo
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- CN113585480A CN113585480A CN202110936502.5A CN202110936502A CN113585480A CN 113585480 A CN113585480 A CN 113585480A CN 202110936502 A CN202110936502 A CN 202110936502A CN 113585480 A CN113585480 A CN 113585480A
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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
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
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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
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
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Abstract
The invention relates to a construction method of an assembled double T plate of a herringbone frame rib plate of an outer wrapping type lower chord member, which comprises the following steps: (1) prefabricating a herringbone frame, a wing plate, a lower chord, an end rod and a stabilizing rod; (2) transporting the prefabricated part to an assembly site, assembling the herringbone frame and the lower chord member to form two parallel herringbone frame rib plates, and connecting the two herringbone frame rib plates by adopting a stabilizing rod; (3) assembling wing plates; (4) placing a rib body into the lower chord body to stretch the rib body so as to tension the lower chord; (5) hoisting the assembled and integrated herringbone frame rib plate assembled double T plates to a required position; (6) and (5) disassembling the tool steel strand to finish the installation. The construction method of the invention adopts the segmental prefabrication and the field assembly, is convenient for transportation and storage of a storage yard, saves the cost and improves the convenience, thereby greatly reducing the construction period, bringing economic benefits, having wide application prospect and bringing great promotion effect on the development of the fabricated building.
Description
Technical Field
The invention relates to the technical field of concrete structures in civil engineering, in particular to a construction method of an assembled double-T plate, and particularly relates to a construction method of an assembled double-T plate of a herringbone frame rib plate with an externally-wrapped lower chord.
Background
The fabricated structure is a new emerging technology which is not much in the building industry, the production and manufacturing of the prefabricated components are important core contents, the beam and the plate are integrated by the double-T plate in a unique structural form, the fabricated structure has good structural performance, high construction speed and low manufacturing cost, and the fabricated structure can be made into a bearing component which is large in span, large in coverage area and convenient and economical. The double T-shaped plate consists of a wing plate and two rib plates, wherein the wing plate not only has the function of a plate as a direct bearing surface for external load, but also is a flange when the double T-shaped plate is used as the function of a T-shaped beam. The advantages of multiple functions of one material of the wing plate are that the material is saved and the working procedures are reduced compared with the traditional beam plate system.
When the span of the double T-shaped plate is large, the large overall size of the double T-shaped plate occupies a large space and is limited by transportation, so that the double T-shaped plate is mostly manufactured on site. The problem that the double T-shaped plates are manufactured on site still exists, namely the large space volume of the integral double T-shaped plates occupies a large storage yard, cannot meet the stacking requirement and is difficult to manufacture quickly. And even when the length of the double T-shaped plate is smaller and the section is smaller, the double T-shaped plate still occupies larger cargo space, so that the transport capacity is limited, the transportation cost is increased, the engineering progress is delayed, and the popularization of the double T-shaped plate is not facilitated. In addition, the field open cast-in-place manufacturing of the double T-shaped plates is also influenced by factors such as typhoon, heavy rain, low-temperature weather and the like, and the progress is also influenced. Practice proves that: the traditional construction method for integrally manufacturing the double T-shaped plate is a bottleneck which seriously restricts the construction period, often leads to the increase of the construction period and times, and can not embody the advantages of an assembled structure.
In the prior art, a technology of separately prefabricating a wing plate and a rib plate and then combining the wing plate and the rib plate into an integral double-T plate is provided, so that the problems are solved. However, practical and theoretical engineering studies have shown that: when the span of the double-T plate is large, along with the increase of the span, the increase of the self weight of the double-T plate is not linear increase, but nonlinear increase, and the construction cost is also nonlinear increase. The main reason is that the increase of the height of the rib plate is nonlinear, so that the self weight of the rib plate is increased and also nonlinear, the rib plate is made into a truss form, and the problem can be solved, but the concept is limited by a storage and transportation space required by the integral prefabrication of the truss, a complex reinforcement of the truss, a complex mold system and high cost.
Therefore, to solve the above problems, further innovative methods are required.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the construction method for the double T-shaped plates assembled by the ribbed plates of the outer-wrapped type lower chord member, which can be quickly and conveniently manufactured and transported and improve the applicability and the universality of the engineering application of the double T-shaped plates.
In order to achieve the purpose, the construction method of the double T-shaped plates assembled by the ribbed plates of the herringbone frame with the externally-wrapped lower chord adopts the following technical scheme:
the herringbone frame rib plate assembly type double T plate comprises wing plates, herringbone frame rib plates and an outer wrapping type lower chord rod, the herringbone frame rib plates are arranged above the lower chord rod and connected with the lower chord rod, the wing plates are tiled above the herringbone frame rib plates and connected with the herringbone frame rib plates, the herringbone frame rib plates comprise at least two prefabricated herringbone frames and are assembled by taking a single herringbone frame as a basic unit, and the tail end of a herringbone frame body is arranged in the outer wrapping type lower chord rod body.
The herringbone frame is a Y-shaped frame, an inverted splayed frame, a V-shaped frame or an inverted V-shaped frame which are formed by inversion, and is collectively called as a herringbone frame in the invention, and the herringbone frame is made of concrete, steel or steel concrete composite materials.
The propeller strut is a whole and comprises a first limb and a second limb, the axes of the first limb and the second limb are set to be a set angle, and the upper ends of the first limb and the second limb are connected into a whole and are called as a second end.
The herringbone frames are arranged along the axial direction of the lower chord, and the end parts of the adjacent herringbone frames are tightly propped against the end parts.
The propeller strut, the wing plate and the lower chord member form a vertical truss, the propeller strut is used as a web member of the truss to be integrally sheared (the first branch and the second branch are only subjected to axial force), the wing plate is used as an upper chord member (horizontally pressed), and the lower chord member is used as a lower tension chord member (horizontally). Compared with the integrally prefabricated truss or the double T-shaped plate with the rib plates arranged as the truss, the truss form saves materials and reduces self weight compared with a solid plate, but the prefabrication requires complicated and expensive moulds and complicated arrangement of ribs in the integral truss, so that the aforementioned advantages of the truss are partially offset. The herringbone frame rib plate is adopted, the web members of the truss are decomposed into simple basic units, the repetition rate is improved, the mold cost is saved, the reinforcement is standardized and simplified, the advantages of the solid type rib plate and the truss type rib plate are integrated, the respective defects are abandoned, and the herringbone frame rib plate is an optimized concept. Moreover, compared with the method of splitting the truss web members into single tension or compression rod members, the method is unstable, complex and difficult to control during installation, and the herringbone frame has the advantages of both integrity and convenience during installation, so that the method is an optimal concept.
Furthermore, the outer side of the frame body at the lower end of the propeller strut is provided with an anti-slip bulge for preventing the outer wrapping type lower chord from being separated from the propeller strut, and the anti-slip bulge is in a prism shape, a block shape, a dot shape or a bolt shape.
Furthermore, the bolt-shaped antiskid bulges are arranged in an assembly mode, one end of each bolt-shaped antiskid bulge is arranged in the herringbone frame body, the other end of each bolt-shaped antiskid bulge is exposed and called an exposed end, the exposed end is arranged in a gap between the outer wrapping type lower chord and the herringbone frame, post-positioned slurry is arranged in the gap, the outer wrapping type lower chord and the herringbone frame are connected together, and the post-positioned slurry is realized by a grouting method.
Furthermore, the outer side of the frame body at the lower end of the propeller strut is provided with an anti-slip groove for preventing the outer wrapping type lower chord from being separated from the propeller strut, and the anti-slip groove is in a prismatic shape, a block shape, a dot shape or a bolt shape.
The lower chord is arranged in an outer wrapping mode, the lower end of the herringbone frame is arranged inside the outer wrapping type lower chord, namely the tail end of the herringbone frame body is arranged inside the lower chord body, and the outer wrapping type lower chord is provided with a hole for the tail end of the herringbone frame body to be inserted.
Further, the lower chord is a hollow pipe body. The pipe body material is a concrete, steel or steel concrete composite material.
Furthermore, a rib body is additionally arranged in the pipe body, the rib body can apply prestress to tension the lower chord, the rib body is made of steel, carbon fiber or high-strength chemical materials and the like, and the steel rib body is made of steel bars and prestressed ribs (steel strands, steel wires or prestressed thread steel bars and the like).
Holes are formed in the wing plates, and the upper ends of the herringbone brackets are arranged in the holes of the wing plates. The wing plate material is a concrete, steel or steel concrete composite material.
Furthermore, the wing plates are arranged in a sectional mode, the wing plates of each section are arranged into wing plates, holes are formed in the wing plates, and the upper ends of the lambdoidal frames are arranged in the holes of the wing plates.
Furthermore, the anti-slip keys are arranged at the joint parts of the outer wrapping type lower chord and the herringbone frame to prevent the lower end of the herringbone frame and the outer wrapping type lower chord from sliding, the anti-slip keys are in a strip shape, a block shape or a point shape, and the anti-slip keys are made of concrete, steel-concrete composite materials, plastics or wood. The antiskid key and the outer wrapping type lower chord are arranged into a whole or are arranged into a split assembly or connection mode.
Furthermore, the outer wrapping type lower chord is provided with an anti-slip groove at the joint part of the outer wrapping type lower chord and the propeller strut, the anti-slip groove is internally provided with post-slurry to prevent the lower end of the propeller strut and the outer wrapping type lower chord from slipping, and the anti-slip groove is in a prismatic shape, a block shape, a dot shape or a bolt shape.
Furthermore, a wedging body is arranged between the upper end of the propeller strut and the inner hole of the wing plate, and the wedging body is a postposition slurry, a wedge-shaped body and the like.
The end part of the herringbone frame rib plate assembled double T plate is provided with an end rod connecting wing plate and an outer-wrapped lower chord, the end rod is vertically arranged and bears the pressure of the support, and the herringbone frame, the outer-wrapped lower chord and the end rod are arranged in a vertical plane.
Furthermore, when the double T-shaped plates assembled by the herringbone frame rib plates with the outer wrapping type lower chord rods are assembled on site, temporary stabilizing rods in the horizontal direction can be additionally arranged between the herringbone frame rib plates and used for fixing the two assembled herringbone frame rib plates. The stabilizer bar is rod-shaped and is made of steel, concrete and steel concrete composite materials.
Furthermore, when the double T-shaped plates assembled by the rib plates of the outer wrapping type lower chord member herringbone frame are assembled on site, temporary tool steel stranded wires parallel to the wing plates are additionally arranged at the upper parts of the wing plates and used for tensioning the wing plates of the segmented wing plates and ensuring the integrity and stability of the double T-shaped plates in the hoisting process.
The double T-shaped plates assembled by the herringbone frame rib plates with the outer wrapping type lower chord members are constructed by adopting the following construction method:
the first step is as follows: in a prefabrication factory, the herringbone frame, the wing plate, the outer wrapping type lower chord, the end rod and the stabilizing rod are prefabricated in parallel;
the second step is that: transporting the prefabricated part to an assembly site, firstly assembling the herringbone frame and the outer wrapping type lower chord member, placing a frame body at the lower end of the herringbone frame into a reserved hole of the outer wrapping type lower chord member, placing post-slurry, and connecting two herringbone frame rib plates by adopting a stabilizing rod;
the third step: flatly laying wing plates on the propeller strut, placing the upper end of the propeller strut into a hole of the wing plates, and installing tool steel strands to tension the wing plates of the wing plates;
the fourth step: the bar body of the outward wrapped lower chord is internally provided with a rib body, and the rib body is tensioned so as to tension the lower chord;
the fifth step: hoisting the assembled and integrated double T-shaped plates of the herringbone frame rib plates of the outer wrapping type lower chord to a required position;
and a sixth step: and (4) determining whether the stabilizer bar is taken off or not according to the situation, and detaching the tool steel strand to finish the installation.
Compared with the existing double T-shaped plates, the double T-shaped plate with the assembled ribbed plates of the outer-wrapping type lower chord herringbone frame has the following advantages:
1. the herringbone frame gives full play to the advantage of truss stress, reduces the dead weight of the solid rib plate, reduces the material with lower efficiency in the solid rib plate, improves the utilization rate of the material, and enlarges the span of the double T plates in an efficient mode;
2. the herringbone frame ribbed slab takes a single herringbone frame as a basic unit, the prefabrication repetition rate is greatly improved, the advantages and the strength of the prefabricated assembled type are exerted, after the solid ribbed slab is arranged into the truss type ribbed slab, a steel die used during concrete prefabrication is more complicated and the cost is increased sharply, after the herringbone frame ribbed slab is adopted, the steel die used during prefabrication becomes extremely simple and the cost is obviously reduced, compared with a double T-shaped slab of the integral solid ribbed slab, the cost of the steel die is reduced from the ten-thousand-element level and the million-element level to the thousand-element level and the hundred-element level, the disadvantage that the prefabricated assembled type steel die occupies a large ratio is completely improved, and the prefabricated assembled type steel die is beneficial to application and popularization of the prefabricated assembled type;
3. the cost of a steel mould of the wing plate is obviously reduced as the cost of a propeller strut when the wing plate is prefabricated in sections;
4. the storage and transportation cost of the herringbone frame rib plate double T plates is greatly reduced, and the convenience is obviously improved;
5. the double-T plate is assembled on site, and because each piece has reached the strength in advance, the double-T plate can be assembled in severe environments such as rainy days and low temperatures only under the condition that partial rainproof measures (such as a worker wearing an umbrella or a rain cape) are needed, and the construction speed is accelerated.
In a word, the double T-shaped plates of the ribbed plates of the herringbone frame with the outer wrapping type lower chord can save cost, shorten construction period (which is cost in many times), improve efficiency, improve construction convenience, and enable the double T-shaped plates to have wider application prospect and be more suitable for being optimized and selected for assembly type buildings.
Drawings
FIG. 1 is a side elevational view of a propeller strut of the present invention.
Fig. 2 is a side elevational view of the propeller strut erection position of the present invention.
Fig. 3 is a longitudinal section of the assembled propeller strut and wing plate and outer wrap lower chord of the present invention.
Fig. 4 is a cross-sectional view of the assembled propeller strut and wing plate and outer wrap lower chord of the present invention.
FIG. 5 is a cross-sectional view of the positional relationship of the overclad lower chord and the man-like brace of the present invention.
FIG. 6 is a longitudinal cross-sectional view of the positional relationship of the outer wrap lower chord of the present invention and the man-like brace.
FIG. 7 is a horizontal cross-sectional view of the positional relationship of the overclad lower chord and the man-like brace of the present invention.
Reference numerals:
1A-bracket
11 first limb
12 second limb
13 anti-skid projection
2 wing plate
3 outer wrapping type lower chord
31 tendon body
32 anti-skid key
4 end rod
5 post-slurry
6 stabilizer bar
7 tool steel strand
Detailed Description
In order to clearly understand the technical contents of the present invention, the following examples are given in detail.
Referring to fig. 1 to 7, the double T-shaped plates of the herringbone frame rib of the outer wrapping type lower chord comprise a herringbone frame 1, a wing plate 2, an outer wrapping type lower chord 3 and an end rod 4. A herringbone frame 1 rib plate is arranged above an outer wrapping type lower chord member 3 and connected with the outer wrapping type lower chord member 3, a wing plate 2 is tiled above the herringbone frame 1 rib plate and connected with the herringbone frame 1 rib plate, an end rod 4 is connected with the wing plate 2 and the outer wrapping type lower chord member 3, and the herringbone frame 1, the outer wrapping type lower chord member 3 and the end rod 4 are arranged in a vertical plane. The rib plate of the herringbone frame 1 comprises a plurality of prefabricated herringbone frames 1, and the herringbone frames 1 are assembled by taking a single herringbone frame 1 as a basic unit. The propeller strut 1 is a whole and comprises a first branch 11 and a second branch 12, the axes of the first branch 11 and the second branch 12 are set to be a set angle, and the upper ends of the first branch 11 and the second branch 12 are connected into a whole. The herringbone frame is characterized in that an antiskid bulge 13 is arranged at the lower end of the herringbone frame 1, a rib body 31 is arranged in a hollow pipe body of the outer wrapping type lower chord 3, an antiskid key 32 is arranged on one side of the herringbone frame 1 of the outer wrapping type lower chord 3, and a postposition slurry 5 is arranged between the outer wrapping type lower chord 3 and the herringbone frame 1. When the double T-shaped plates of the herringbone frame ribbed plates of the outer wrapping type lower chord rods are assembled, the stabilizing rods 6 are arranged to fix the two herringbone frame 1 ribbed plates, the tool steel stranded wires 7 parallel to the wing plates 2 are arranged above the wing plates 2, and the wing plates of the wing plates 2 are tensioned by applying prestress.
Example 1
The first step is as follows: prefabricating the propeller strut, the wing plate, the outer wrapping type lower chord and the end rod in parallel;
the second step is that: transporting the prefabricated parts to an assembly site, fixing two lower chords which are parallel to each other at a set position, inserting the tail end of the propeller strut into the outer-wrapped lower chord from the upper side, grouting in a gap between the propeller strut and the outer-wrapped lower chord to form post-slurry, so that the propeller strut and the lower chord are fixed to form two parallel propeller strut rib plates, and connecting the two propeller strut rib plates by adopting a stabilizing rod;
the third step: flatly laying the wing plates on the propeller strut, and placing the upper end of the propeller strut into the hole of the wing plates;
the fourth step: the bar body of the outward wrapped lower chord is internally provided with a rib body, and the rib body is tensioned so as to tension the lower chord;
the fifth step: and hoisting the assembled and integrated double T-shaped plates of the herringbone frame rib plates of the outer wrapping type lower chord members to a required position.
The construction method of the outer-wrapping type lower chord A-frame rib plate assembled type double-T plate structure provided by the invention adopts the steps of segmental prefabrication and field assembly, is convenient for transportation and storage in a storage yard, saves the cost, improves the convenience, greatly reduces the construction period, brings economic benefits, has wide application prospect, and brings great promotion effect on the development of an assembled type building.
In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (9)
1. The construction method of the herringbone frame rib plate assembled double T plate with the outer wrapping type lower chord is characterized in that the herringbone frame rib plate assembled double T plate with the outer wrapping type lower chord comprises a wing plate, a herringbone frame rib plate and an outer wrapping type lower chord, the herringbone frame rib plate is arranged above the outer wrapping type lower chord and is connected with the outer wrapping type lower chord, the wing plate is tiled above the herringbone frame rib plate and is connected with the herringbone frame rib plate, the herringbone frame rib plate comprises at least two prefabricated herringbone frames which are assembled by taking a single herringbone frame as a basic unit, the tail end of the herringbone frame body is arranged inside the rod body of the outer wrapping type lower chord, and the construction method of the herringbone frame rib plate assembled double T plate with the outer wrapping type lower chord comprises the following steps:
the first step is as follows: simultaneously prefabricating the herringbone frames, the wing plates, the lower chords, the end rods and the stabilizing rods in parallel in a prefabricating factory;
the second step is that: transporting the prefabricated parts to an assembly site, firstly assembling the herringbone frame and the outer-wrapped lower chord, fixing the two outer-wrapped lower chords which are parallel to each other at a set position, inserting the tail end of the herringbone frame into the outer-wrapped lower chord from the upper part, injecting slurry into a gap between the herringbone frame and the outer-wrapped lower chord to form post slurry, thereby fixing the herringbone frame and the lower chord, forming two parallel herringbone frame rib plates, and connecting the two herringbone frame rib plates by adopting a stabilizing rod;
the third step: flatly laying wing plates on the propeller strut, placing the upper end of the propeller strut into a hole of the wing plates, and installing tool steel strands to tension the wing plates of the wing plates;
the fourth step: a rib body is arranged in the lower chord rod body, and the rib body is tensioned so as to tension the lower chord rod;
the fifth step: hoisting the assembled and integrated herringbone frame rib plate assembled double T plates to a required position;
and a sixth step: and (4) determining whether the stabilizer bar is taken off or not according to the situation, and detaching the tool steel strand to finish the installation.
2. The method for constructing an assembled double-T plate by using a herringbone frame of an outer covered lower chord as claimed in claim 1, wherein the herringbone frame is a whole and comprises a first branch and a second branch, the axes of the first branch and the second branch are arranged at a preset angle, the upper ends of the first branch and the second branch are connected into a whole, the herringbone frame is arranged along the axial direction of the outer covered lower chord, and the end parts of the adjacent herringbone frame are tightly abutted.
3. The construction method of the assembled double-T plate of the ribbed plate of the outer covered type lower chord herringbone frame according to claim 1, wherein an anti-slip bulge is arranged on the outer side of the frame body at the lower end of the herringbone frame, or an anti-slip groove is arranged on the outer side of the frame body at the lower end of the herringbone frame;
and a gap between the frame body at the lower end of the herringbone frame and the outer wrapping type lower chord is internally provided with post-slurry for connecting the herringbone frame and the outer wrapping type lower chord together.
4. The method for constructing an assembled double-T plate by using a herringbone frame of an outer wrapping type lower chord member as claimed in claim 1, wherein the outer wrapping type lower chord member is provided as a hollow pipe body, the lower end of the herringbone frame is arranged inside the rod body of the outer wrapping type lower chord member, and the outer wrapping type lower chord member is provided with a hole for inserting the tail end of the herringbone frame body.
5. The method for constructing an assembled double-T plate by using a herringbone frame rib of an outer wrapping type lower chord as claimed in claim 4, wherein a rib is additionally arranged in the pipe body and used for applying prestress to tighten the outer wrapping type lower chord.
6. The construction method of the double T-shaped plates with the assembled herringbone frame rib plates of the outer wrapping type lower chord member according to claim 1, wherein holes are formed in the wing plates, and the upper ends of the herringbone frame are arranged in the holes of the wing plates.
7. The method of constructing an assembled double T panel with an outer wrap type bottom chord A-bracket ribbed plate of claim 1 wherein the flanges are segmented, each segment of the flanges is configured as a fin having a hole therein, and the top end of the A-bracket is configured in the hole of the fin.
8. The method for constructing an assembled double-T plate by using herringbone frame ribs of an outer wrapped type lower chord according to claim 1, wherein an anti-slip key or an anti-slip groove is arranged at the joint part of the outer wrapped type lower chord and a herringbone frame, a post-slurry is arranged in a gap between a frame body at the lower end of the herringbone frame and the outer wrapped type lower chord, and the herringbone frame is connected with the outer wrapped type lower chord together to prevent the sliding between the lower end of the herringbone frame and the lower chord.
9. The method for constructing an assembled double-T plank with an outer-wrapped type lower chord according to any one of claims 1 to 8, wherein the end of the assembled double-T plank with an A-plank and a lower chord is provided with an end rod connecting the wing plate and the lower chord, the end rod is vertically arranged and bears the pressure of a support, and the A-plank, the outer-wrapped type lower chord and the end rod are arranged in a vertical plane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110936502.5A CN113585480A (en) | 2021-08-16 | 2021-08-16 | Construction method for assembled double T-shaped plates of ridge plate of outer wrapping type lower chord member |
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| CN202110936502.5A CN113585480A (en) | 2021-08-16 | 2021-08-16 | Construction method for assembled double T-shaped plates of ridge plate of outer wrapping type lower chord member |
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| US20120247055A1 (en) * | 2009-12-14 | 2012-10-04 | Illinois Tool Works Inc. | Structural unit comprising a truss and fibrous cementitious slab building element connected together |
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| CN110005124A (en) * | 2019-02-25 | 2019-07-12 | 上海城建建设实业(集团)有限公司 | The construction method of assembled T plate |
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