阅读说明：本技术 内嵌式下弦杆人字架腹杆装配式桁架 (Embedded type lower chord member herringbone frame web member assembly type truss ) 是由 顾韵宇 王立明 王明民 栾文杰 于 2021-08-16 设计创作，主要内容包括：本发明涉及一种内嵌式下弦杆人字架腹杆装配式桁架,所述的装配式桁架包括上弦杆、人字架腹杆和内嵌式下弦杆,人字架腹杆设置在内嵌式下弦杆上方,人字架末端包覆内嵌式下弦杆并与下弦杆连接,上弦杆平铺在人字架腹杆的上方并与人字架腹杆连接,所述的人字架腹杆包含有至少两个预制的人字架,以单个人字架为基本单元装配而成。本发明的该内嵌式下弦杆人字架腹杆装配式桁架,采用分片预制、现场组装的方法,方便运输和堆场储备,节约成本,提高方便性,从而极大减少施工工期,带来经济效益,具有广阔应用前景,将对装配式结构的发展带来极大的推动作用。(The invention relates to an assembled truss with embedded type lower chord herringbone frame web members, which comprises an upper chord member, herringbone frame web members and embedded type lower chord members, wherein the herringbone frame web members are arranged above the embedded type lower chord members, the embedded type lower chord members are wrapped at the tail ends of the herringbone frames and connected with the lower chord members, the upper chord members are tiled above the herringbone frame web members and connected with the herringbone frame web members, the herringbone frame web members comprise at least two prefabricated herringbone frames, and the herringbone frames are assembled by taking a single herringbone frame as a basic unit. The web member assembly type truss of the embedded type lower chord member herringbone frame adopts the methods of segmented prefabrication and field assembly, is convenient to transport and store in a storage yard, saves cost, improves convenience, greatly reduces construction period, brings economic benefit, has wide application prospect, and brings great promotion effect on the development of an assembly type structure.)

1. The herringbone frame web member assembly truss is characterized by comprising an upper chord member, a herringbone frame web member and an embedded lower chord member, wherein the herringbone frame web member is arranged above the embedded lower chord member and is connected with the embedded lower chord member, the upper chord member is arranged above the herringbone frame web member and is connected with the herringbone frame web member, the herringbone frame web member comprises at least two prefabricated herringbone frames which are assembled by taking a single herringbone frame as a basic unit, and the embedded lower chord member is wrapped by the tail end of the herringbone frame.

2. The in-line lower boom herringbone web assembled truss of claim 1, wherein said herringbone frame is integrally provided with a first end and a second end, and said herringbone frame comprises a first branch and a second branch, axes of said first branch and said second branch are arranged at a predetermined angle, upper ends of said first branch and said second branch are integrally connected, said herringbone frame is arranged along an axial direction of said upper boom and said in-line lower boom, and ends of adjacent herringbone frames are abutted.

3. The inside-embedded type lower chord herringbone truss web member assembly type truss of claim 1, wherein the inside of the embedded space of the truss body at the first end of the lower part of the herringbone truss is provided with an anti-slip protrusion, or the inside of the embedded space of the truss body at the first end of the lower part of the herringbone truss is provided with an anti-slip groove;

and a gap between the embedded space at the first tail end of the lower part of the propeller strut and the embedded lower chord is provided with post-slurry for connecting the propeller strut and the embedded lower chord together.

4. The in-line lower chord man-like web assembled truss of claim 1 wherein the in-line lower chord is provided as a hollow tube.

5. The assembled truss web members of in-line lower chord type trestle according to claim 4, wherein a rib is additionally arranged in the tube body, and the rib is used for applying prestress to tighten the in-line lower chord.

6. The in-line lower chord herringbone web assembled truss of claim 1 wherein said upper chord is provided with an aperture therein and a second end of said upper portion of said herringbone is disposed within said aperture of said upper chord.

7. The in-line lower chord herringbone web assembled truss of claim 1, wherein the upper chord member and the lower chord member are provided in a segmented manner, and the chord member of each segment is provided as a chord segment, the chord segment of the upper chord member is provided with a hole therein, and the second end of the upper portion of the herringbone frame is provided in the hole of the chord segment of the upper chord member.

8. The herringbone web assembled truss of claim 1, wherein said embedded lower chord is provided with an anti-slip key or an anti-slip groove at the intersection with said herringbone.

9. The in-line lower chord man-like carrier web assembly truss of claim 1 wherein the ends of the in-line lower chord man-like carrier web assembly truss are provided with end members connecting the upper and lower chords to bear against the support, the end members being vertically disposed, the man-like carrier and the in-line lower chords and end members being disposed in a vertical plane.

10. The in-line lower chord herringbone web assembled truss of any one of claims 1 to 9, wherein the in-line lower chord is provided with a non-slip bolt at a portion where it meets the herringbone frame, the non-slip bolt being configured to be assembled and directly penetrate through the end of the herringbone frame and the in-line lower chord.

Technical Field

The invention relates to the technical field of concrete structures in civil engineering, in particular to an assembled truss, and particularly relates to an embedded type lower chord herringbone frame web member assembled truss.

Background

The prefabricated concrete structure is an irreplaceable technology and structural form in the building industry, the production and manufacture of prefabricated concrete components occupy important positions, the truss is a common structural form, and the prefabricated concrete truss is widely applied to the engineering as a building, a roof structure, a bridge structure and the like. However, the overall precast concrete truss not only occupies a large space due to the huge overall dimension of the truss, is limited by transportation and is manufactured on site, but also has a defect in the process due to the storage space required by the overall precast of the truss, the complex reinforcing bars of the truss, the complex mold system and the expensive cost, and even if compared with a solid beam, the saving of the truss material is offset by the complexity caused by the mold cost and the complex reinforcing bars. In addition, when the span of the truss is large, the field open-air cast-in-place manufacturing 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 prefabricating the truss as a whole influences the construction period and cost, so that the construction period cost is increased, and the advantage of an assembled structure is difficult to embody.

Therefore, further innovative thinking is needed to address this problem.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the embedded type lower chord member herringbone frame web member assembly type truss which can be quickly and conveniently manufactured and transported and can improve the applicability and the universality of engineering application.

In order to achieve the purpose, the embedded type herringbone trestle web member assembly type truss adopting the technical scheme comprises the following steps:

the herringbone frame web member comprises at least two prefabricated herringbone frames which are assembled by taking a single herringbone frame as a basic unit, and the embedded lower chord member is coated at the tail end of the herringbone frame body.

The herringbone frame is the same as the splayed frame and the inverted V-shaped frame, and is turned upside down into a Y-shaped frame, an inverted splayed frame, a V-shaped frame and the like, the herringbone frame 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 an integral component, is provided with a first end and a second end 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.

The herringbone frames are arranged along the axial direction of the upper chord and the embedded lower chord, and the end parts of the adjacent herringbone frames are tightly propped.

The herringbone frame, the upper chord and the embedded lower chord form a vertical truss together, the herringbone frame is used as a web member of the truss to be integrally sheared (the first branch and the second branch are only stressed by axial force), the upper chord is horizontally pressed, and the lower chord is used as a lower (horizontally) tension chord. Compared with the integrally prefabricated truss, the truss form saves materials and reduces self weight compared with a solid beam, but the prefabrication requires complicated and expensive moulds and the complexity of reinforcing the integral truss, so that the aforementioned advantages of the truss are partially offset. The herringbone frame web members are adopted, the web members of the truss are decomposed into simple basic units, the repetition rate is improved, the die cost is saved, the reinforcing bars are standardized and simplified, the advantages of the solid beam and the integral truss are integrated, the respective defects are eliminated, and the herringbone frame web members are the optimized conception. Moreover, compared with the method of splitting the truss web members into single tension or compression rod members, the method is instable, complex and difficult to control during installation, and the herringbone frame has the advantages of both the whole and convenience during installation, so that the method is an optimal concept.

Furthermore, the first end of the lower part of the propeller strut frame body is provided with an embedded space (opening) for placing the embedded lower chord, the inner side of the embedded space (close to the lower chord) is provided with an anti-slip bulge for preventing the embedded lower chord from being separated from the propeller strut, and the anti-slip bulge is in a prismatic 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 as an exposed end, the exposed end is arranged in the embedded space of the herringbone frame, post-arranged slurry is arranged in a gap between the embedded lower chord and the herringbone frame, the embedded lower chord and the herringbone frame are connected together, and the post-arranged slurry is realized by a grouting method.

Optionally, an anti-slip groove is formed in the inner side of a frame body embedded space (close to the lower chord) at the first end of the lower portion of the propeller strut and used for preventing the embedded lower chord from being separated from the propeller strut, and the anti-slip groove is in a prism shape, a block shape, a dot shape or a bolt shape.

The lower chord is embedded, and the embedded lower chord is wrapped at the first tail end of the lower part of the propeller strut.

Further, the lower chord is a hollow pipe body. The pipe body material is a concrete, steel or steel concrete composite material.

Furthermore, the pipe body is internally and additionally provided with a rib body, the rib body can apply prestress to tension the lower chord member, 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).

The holes are formed in the upper chord, and the second tail end of the upper portion of the propeller strut is arranged in the holes of the upper chord. The upper chord member is made of concrete, steel or steel concrete composite material.

Furthermore, the upper chord and the lower chord are arranged in a sectional mode, the chord of each section is arranged in a chord section, a transverse hole is formed in the chord section of the upper chord, and the second tail end of the upper portion of the propeller strut is arranged in the transverse hole of the chord section of the upper chord. The string section is a part of a chord.

Furthermore, the anti-slip key is arranged at the joint part of the embedded lower chord and the propeller strut to prevent the sliding between the lower end of the propeller strut and the embedded lower chord, the anti-slip key is in a strip shape, a block shape, a dot shape or a bolt shape, and the anti-slip key is made of concrete, steel concrete composite materials, chemical materials or wood. The anti-skid key and the embedded lower chord are arranged into a whole, or are arranged into a split assembly type or are directly connected.

Furthermore, an anti-slip bolt is arranged at the joint part of the embedded lower chord and the propeller strut and is arranged in an assembly mode and directly penetrates through the tail end of the propeller strut body and the embedded lower chord.

Optionally, an anti-slip groove is formed in a part where the embedded lower chord is connected with the propeller strut, post-slurry is arranged in the anti-slip groove to prevent the lower end of the propeller strut and the embedded lower chord from sliding, 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 second tail end of the upper part of the propeller strut and the opening of the upper chord, and the wedging body is a postposition slurry, a wedge and the like.

The end part of the herringbone frame web member assembly truss with the embedded lower chord member is provided with an end member which is connected with the upper chord member and the embedded lower chord member and bears the pressure of the support, the end member is vertically arranged, and the herringbone frame, the embedded lower chord member and the end member are arranged in a vertical plane.

Compared with the existing concrete truss, the herringbone truss with the embedded lower chord members has the following advantages:

1. the herringbone frame web member 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, the steel mould used in the prefabrication of the integral concrete truss is more complicated than that of a solid beam and the cost is increased sharply, after the herringbone frame web member is adopted, the steel mould used in the prefabrication becomes extremely simple and the cost is obviously reduced, compared with the integrally prefabricated concrete truss, the cost of the steel mould is reduced from a million-element level to a thousand-element level and a hundred-element level, the disadvantage that the prefabricated assembled type steel mould occupies a large area is completely improved, and the prefabricated assembled type steel mould is favorably applied and popularized;

2. the steel mould cost of the segment is reduced, and the construction convenience and the construction rapidity of the segment are as obvious as those of a herringbone frame;

3. the storage and transportation cost of the herringbone frame web member assembled truss with the embedded lower chord member is greatly reduced, and the convenience is obviously improved;

4. the truss is assembled on site, and because each piece has reached the strength in advance, the truss 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, so that the construction speed is accelerated.

In a word, the embedded type lower chord A-frame web member assembly type truss can save cost, shorten construction period (which is cost in many times), improve efficiency, improve construction convenience, and enable the prefabricated assembly type truss 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 cross-sectional view of the assembled A-bracket of the present invention with an upper chord and an embedded lower chord.

Fig. 4 is a cross-sectional view of the assembled propeller strut of the present invention with an upper chord and an embedded lower chord.

Fig. 5 is a cross-sectional view of the positional relationship of the inline lower chord and the man-brace of the present invention.

FIG. 6 is a longitudinal cross-sectional view of the positional relationship of the in-line lower chord and the A-bracket of the present invention.

FIG. 7 is a horizontal cross-sectional view of the positional relationship of the in-line lower chord and the A-bracket of the present invention.

Reference numerals:

1A-bracket

11 first limb

12 second limb

13 anti-skid projection

14 space of inset

141 anti-slip groove

2 upper chord

3 Embedded lower chord

31 tendon body

32 anti-skid key

4 end rod

5 post-slurry

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 herringbone truss web assembly truss with embedded lower chords includes a herringbone truss 1, an upper chord 2, an embedded lower chord 3 and end members 4. A-bracket 1 web member is arranged above an embedded lower chord member 3 and connected with the embedded lower chord member 3, an upper chord member 2 is arranged above the web member of the A-bracket 1 and connected with the web member of the A-bracket 1, an end rod 4 is connected with the upper chord member 2 and the embedded lower chord member 3, and the A-bracket 1, the embedded lower chord member 3 and the end rod 4 are arranged in a vertical plane. The web member of the propeller strut 1 comprises a plurality of prefabricated propeller struts 1, and the propeller strut 1 is assembled by taking a single propeller strut 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 anti-skid protrusion 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 embedded lower chord 3, the embedded lower chord 3 is provided with an anti-skid key 32, an embedded space 14 is arranged in a frame body at the second end of the herringbone frame 1, an anti-skid groove 141 is arranged in the embedded space 14, and a post-positioned slurry 5 is arranged in the embedded space 14 between the embedded lower chord 3 and the herringbone frame 1.

Example 1

The first step is as follows: in a prefabrication factory, prefabricating the propeller strut, the upper chord, the embedded lower chord and the end rod in parallel;

the second step is that: transporting the prefabricated components to an assembly site, firstly assembling the propeller strut and the embedded lower chord member, placing the embedded lower chord member into an embedded space of a first tail end frame body at the lower part of the propeller strut, and injecting post-slurry into a gap between the propeller strut and the lower chord member so as to fix the propeller strut and the lower chord member and form an assembled propeller strut web member;

the third step: the upper chord is laid on the propeller strut, the second tail end of the upper portion of the propeller strut is placed in the hole of the upper chord, and a wedging body is adopted to wedge the tail end of the propeller strut;

the fourth step: a bar body of the embedded lower chord is internally provided with a bar body, and the bar body is tensioned so as to tension the lower chord;

the fifth step: and hoisting the assembled and integrated embedded type lower chord member herringbone frame web member assembled truss to a required position.

The web member assembly type truss of the embedded type lower chord member herringbone frame provided by the invention adopts a method of segmental prefabrication and 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 prospects, and bringing great promotion effect on the development of an assembly type structure.

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.