CN113605526B - Construction method of outer wrapping type lower chord member herringbone frame web member assembly truss - Google Patents
Construction method of outer wrapping type lower chord member herringbone frame web member assembly truss Download PDFInfo
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- CN113605526B CN113605526B CN202110936083.5A CN202110936083A CN113605526B CN 113605526 B CN113605526 B CN 113605526B CN 202110936083 A CN202110936083 A CN 202110936083A CN 113605526 B CN113605526 B CN 113605526B
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- lower chord
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- truss
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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
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0486—Truss like structures composed of separate truss elements
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
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- Electromagnetism (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention relates to a construction method of an outer-wrapping type lower chord member herringbone frame web member assembled truss, which comprises the following steps: (1) Parallelly prefabricating a herringbone frame, an upper chord member, an outer wrapping lower chord member and an end rod in a prefabricating factory; (2) Transporting the prefabricated part to an assembly site, assembling a herringbone frame and an outer wrapping type lower chord member, placing a first end frame body of the herringbone frame into a reserved hole of the outer wrapping type lower chord member, and placing a post-arranged slurry; (3) Spreading the upper chord member on the herringbone frame, placing the second end of the herringbone frame into the hole of the upper chord member, and wedging the end of the herringbone frame by adopting a wedging body; (4) Placing a rib body into the outer wrapping type lower chord member body, and stretching the rib body so as to tension the lower chord member; (5) And hoisting the assembled and integrated outer-wrapping type lower chord member web member assembly truss to a required position. The method for constructing the outer-wrapping type lower chord member web member assembled truss adopts the methods of split prefabrication and field assembly, is convenient for transportation and storage in a storage yard, saves cost, improves convenience, greatly reduces construction period, brings economic benefit, has wide application prospect, and has great pushing effect on the development of assembled buildings.
Description
Technical Field
The invention relates to the technical field of concrete structures in civil engineering, in particular to an assembled truss and a construction method thereof, and specifically relates to an outer-wrapping type lower chord member herringbone frame web member assembled truss construction method.
Background
The assembled structure is an emerging technology of the building industry, the production and manufacture of prefabricated components are important core contents, the truss is a common structural form, and the prefabricated concrete truss is used as a building, roof structure, bridge structure and the like in a large amount in engineering. However, the whole precast concrete truss not only occupies a larger space due to the huge outline size, is limited by transportation and is manufactured on site, but also has defects due to the storage space required by the whole prefabrication of the truss, complicated reinforcement, complicated die systems and expensive cost of the truss, and even compared with a solid beam, the saving of truss materials is offset by the complicated advantages caused by the die cost and the complicated reinforcement. In addition, when the truss span is larger, the on-site open-air cast-in-place production is also influenced by typhoons, heavy rain, low-temperature weather and other factors, and the progress is also influenced. Practice proves that: the truss is taken as a traditional construction method for whole prefabrication, is a bottleneck severely restricting the construction period, often causes the construction period to be multiplied, and reflects the advantages of an assembled structure.
Accordingly, further innovative approaches are needed to solve the above problems.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an assembled truss structure construction method which can be quickly and conveniently manufactured and transported, so that the applicability and the universality of engineering application of the assembled truss structure construction method are improved.
In order to achieve the above purpose, the construction method of the outer wrapping type lower chord herringbone frame web member assembled truss adopts the following technical scheme:
the outer wrapping type lower chord member web member assembling truss comprises an upper chord member, a web member and an outer wrapping type lower chord member, wherein the web member is arranged above the outer wrapping type lower chord member and connected with the outer wrapping type lower chord member, the upper chord member is arranged above the web member and connected with the web member, the web member comprises at least two prefabricated web frames which are assembled by taking a single web frame as a basic unit, and the tail end of the web frame body is arranged in the outer wrapping type lower chord member.
The 'Y' -shaped frame, the inverted 'V' -shaped frame and the like are commonly referred to as a 'Y' -shaped frame, an inverted 'V' -shaped frame and the like after being inverted, and the 'Y' -shaped frame, the inverted 'V' -shaped frame and the like are all commonly referred to as the 'Y' -shaped frame in the invention, and the 'Y' -shaped frame is made of concrete, steel or steel-concrete composite materials.
The herringbone frame is integrated, is provided with a first tail end and a second tail end, and comprises a first limb and a second limb, the axes of the first limb and the second limb are set to be set angles, and the upper ends of the first limb and the second limb are connected into a whole and are called as the second tail end.
The herringbone frames are arranged along the axial direction of the upper chord member and the outer wrapping type lower chord member, and the end parts of the adjacent herringbone frames are abutted.
The herringbone frame, the upper chord member and the outer wrapping lower chord member form a vertical truss together, the herringbone frame is used as the web member of the truss to be integrally sheared (the first branch limb and the second branch limb are only stressed by the shaft force), the upper chord member is horizontally stressed, and the lower chord member is used as the lower (horizontal) tension chord member. The truss form, while saving material and reducing dead weight over a solid beam, is complex and expensive to mold for prefabrication, as well as the complexity of the reinforcement within the overall truss, relative to an integrally prefabricated truss, such that the aforementioned advantages of the truss are partially offset. The web members of the truss are decomposed into simple basic units, the repetition rate is high, the die cost is saved, the reinforcement is standardized and simplified, the advantages of the solid girder and the integral truss are integrated, the defects of the solid girder and the integral truss are abandoned, and the web members are the optimized conception. Moreover, the form of the propeller strut is an optimal concept, as opposed to the cumbersome nature of the unstable and complex and difficult to control when the truss web members are broken down into individual tension or compression bars, with both overall advantages and ease of installation advantages.
Further, the outer side of the frame body at the first end of the lower part of the herringbone frame is provided with an anti-slip protrusion for preventing the outer wrapping type lower chord member from being separated from the herringbone frame, and the anti-slip protrusion is in a prismatic shape, a block shape, a dot shape or a bolt shape.
Further, the bolt-shaped anti-slip protrusions are arranged in an assembled mode, one end of each bolt-shaped anti-slip protrusion is placed in the herringbone frame body, the other end of each bolt-shaped anti-slip protrusion is exposed and is called an exposed end, the exposed end of each bolt-shaped anti-slip protrusion is arranged in a gap between the outer wrapping type lower chord member and the herringbone frame, rear slurry is arranged in the gap, the outer wrapping type lower chord member is connected with the herringbone frame, and the rear slurry is achieved through a grouting method.
Optionally, an anti-slip groove is arranged at the outer side of the frame body at the first end of the lower part of the herringbone frame and used for preventing the outer wrapping type lower chord member from being separated from the herringbone frame, and the anti-slip groove is prismatic, blocky, punctiform or bolt-shaped.
The lower chord member is arranged to be an outer wrapping type, the first tail end of the lower part of the herringbone frame is arranged inside the outer wrapping type lower chord member, namely, the tail end of the herringbone frame body is arranged inside the lower chord member body, and the outer wrapping type lower chord member is provided with holes for the tail end of the herringbone frame body to be inserted.
Further, the lower chord member is arranged as a hollow pipe body. The pipe body material is concrete, steel or steel concrete composite material.
Furthermore, the pipe body is additionally provided with a tendon body, the tendon body can apply prestress to stretch the lower chord member, the tendon body is made of steel, carbon fiber or high-strength engineering material, and the steel tendon body is made of steel bars and prestress tendons (steel strands, steel wires or prestress screw bars, and the like).
The upper chord member and the lower chord member are internally provided with holes, and the second end of the upper part of the herringbone frame is arranged in the holes of the chord members. The chord member material is concrete, steel or steel concrete composite material.
Further, the upper chord member and the lower chord member are arranged in a sectional mode, the chord member of each section is arranged as a chord section, a transverse hole is formed in the chord section, and the tail end of the upper part of the propeller strut is arranged in the transverse hole of the chord section. The chord section is a portion of the chord.
Further, the outer wrapping type lower chord member is provided with an anti-slip key at the joint part with the herringbone frame to prevent the sliding of the lower end of the herringbone frame and the outer wrapping type lower chord member, 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-slip key and the outer wrapping type lower chord member are integrally arranged, or are formed by split assembly or direct connection.
Further, the joint of the outer wrapping type lower chord member and the herringbone frame is provided with an anti-skid bolt, and the anti-skid bolt is arranged to be assembled and directly penetrates through the outer wrapping type lower chord member body and the tail end of the herringbone frame body.
Optionally, the outer wrapping type lower chord member is provided with an anti-slip groove at the joint part with the herringbone frame, the anti-slip groove is internally provided with a rear slurry body for preventing the lower end of the herringbone frame from sliding with the outer wrapping type lower chord member, and the anti-slip groove is prismatic, blocky, punctiform or bolt-shaped.
Further, a wedging body is arranged between the second end of the upper part of the herringbone frame and the inner opening of the upper chord member, and the wedging body is a rear slurry body, a wedge body and the like.
The end part of the outer wrapping type lower chord member web member assembly truss is provided with an end rod connected with the upper chord member and the outer wrapping type lower chord member, the end rod is vertically arranged and bears the pressure of the support, and the herringbone frame, the outer wrapping type lower chord member and the end rod are arranged in a vertical plane.
The construction method of the outer-wrapping type lower chord member herringbone frame web member assembled truss comprises the following steps of:
the first step: simultaneously prefabricating a herringbone frame, an upper chord member, an outer wrapping lower chord member and an end rod in parallel in a prefabricating factory;
and a second step of: transporting the prefabricated parts to an assembly site, firstly assembling a herringbone frame and an outer wrapping type lower chord member, placing a first end frame body at the lower part of the herringbone frame into a reserved hole of the outer wrapping type lower chord member, and placing a post-arranged slurry;
and a third step of: spreading the upper chord member on the herringbone frame, placing the second end of the upper part of the herringbone frame into the hole of the upper chord member, and wedging the end of the herringbone frame by adopting a wedging body;
fourth step: placing a rib body into the outer wrapping type lower chord member body, and stretching the rib body so as to tension the lower chord member;
fifth step: and hoisting the assembled and integrated outer-wrapping type lower chord member web member assembly truss to a required position.
Compared with the existing truss, the outer-wrapping type lower chord member herringbone frame web member assembly truss has the following advantages:
1. the web member of the herringbone frame takes a single herringbone frame as a basic unit, the prefabrication repetition rate is greatly improved, the advantages and the strength of prefabrication assembly are exerted, the steel mould used in prefabrication of the integral concrete truss is more complex than that of a solid beam and the cost is greatly increased, after the web member of the herringbone frame is adopted, the steel mould used in 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 tens of millions of yuan and millions of yuan to thousands of yuan and hundreds of yuan, the disadvantage that the cost of the prefabricated steel mould is large in proportion is completely improved, and the application and popularization of the prefabricated assembly are facilitated;
2. the cost of the steel mould of the chord section is reduced, and the construction convenience and the rapidness are as obvious as those of the herringbone frame;
3. the storage and transportation cost of the outer wrapping type lower chord member web member assembly truss is greatly reduced, and the convenience is obviously improved;
4. in the on-site truss assembly, as the individual segments reach the strength in advance, the truss assembly work can be still carried out in severe environments such as rainy days, low temperature and the like under the condition that only partial rainproof measures (such as that workers put on umbrellas or wear rain capes) are needed, and the construction speed is increased.
In a word, the outer-wrapping type lower chord member web member fabricated truss can save cost, shorten construction period (the construction period is the cost in many times), improve efficiency, improve construction convenience, and enable the application prospect of the prefabricated fabricated truss to be wider, so that the outer-wrapping type lower chord member web member fabricated truss is more suitable for being the optimal choice of fabricated buildings.
Drawings
Fig. 1 is a side elevation view of the propeller strut of the present invention.
Fig. 2 is a side elevation view of the assembled position of the propeller strut of the present invention.
Fig. 3 is a longitudinal section view of the assembled propeller strut, upper chord and outer lower chord of the present invention.
Fig. 4 is a cross-sectional view of the assembled propeller strut of the present invention with an upper chord and an outer wrap lower chord.
FIG. 5 is a cross-sectional view of the positional relationship of the outer wrap bottom chord and the propeller strut of the present invention.
Fig. 6 is a longitudinal cross-sectional view showing the positional relationship between the outer cover type bottom chord and the propeller strut.
Fig. 7 is a horizontal cross-sectional view of the positional relationship between the outer wrapping type bottom chord and the propeller strut of the present invention.
Reference numerals:
1. herringbone frame
11. First limb part
12. Second limb
13. Anti-slip boss
2. Upper chord
3. Outer wrapping type lower chord
31. Rib body
32. Anti-slip key
4. End rod
5. Post-slurry
Detailed Description
In order to make the technical contents of the present invention more clearly understood, the following examples are specifically described.
Referring to fig. 1 to 7, the outer-wrapping type lower chord web member assembling truss includes a herringbone frame 1, an upper chord 2, an outer-wrapping type lower chord 3 and an end rod 4. The web member of the herringbone frame 1 is arranged above the outer wrapping type lower chord member 3 and is connected with the outer wrapping type lower chord member 3, the upper chord member 2 is arranged above the web member of the herringbone frame 1 and is connected with the web member of the herringbone frame 1, the end rod 4 is connected with the upper chord member 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 web member of the herringbone frame 1 comprises a plurality of prefabricated herringbone frames 1, and the herringbone frames 1 are assembled by taking the herringbone frames 1 as basic units. The herringbone frame 1 is an integral body and comprises a first limb 11 and a second limb 12, the axes of the first limb 11 and the second limb 12 are set to be set angles, and the upper ends of the first limb 11 and the second limb 12 are connected into an integral body. The anti-slip mortar is characterized in that anti-slip protrusions 13 are arranged at the lower end of the herringbone frame 1, ribs 31 are arranged in the hollow tube body of the outer wrapping type lower chord member 3, an anti-slip key 32 is arranged on one side, close to the herringbone frame 1, of the outer wrapping type lower chord member 3, and a rear mortar body 5 is arranged between the outer wrapping type lower chord member 3 and the herringbone frame 1.
Example 1
The first step: simultaneously prefabricating a herringbone frame, an upper chord, an outer wrapping lower chord and an end rod in parallel;
and a second step of: transporting the prefabricated parts to an assembly site, fixing the lower chord member at a set position, inserting the tail end of the herringbone frame into the outer-wrapping lower chord member from above, and grouting in a gap between the herringbone frame and the outer-wrapping lower chord member to form a rear slurry, so that the herringbone frame and the lower chord member are fixed to form an assembled herringbone frame web member;
and a third step of: spreading the upper chord member on the herringbone frame, and placing the upper end of the herringbone frame into the hole of the upper chord member;
fourth step: the rib body is placed in the lower chord member body, and the rib body is tensioned so as to tension the lower chord member;
fifth step: and hoisting the assembled and integrated outer-wrapping type lower chord member web member assembly truss to a required position.
The outer-wrapping type lower chord member web member assembling truss provided by the invention adopts the methods of split prefabrication and field assembly, is convenient for transportation and storage in a storage yard, saves cost, improves convenience, greatly reduces construction period, brings economic benefit, has wide application prospect, and has great pushing effect on the development of an assembling type building.
In this specification, the invention has been described with reference to specific embodiments thereof. It will be apparent, however, that various modifications and changes may be made without departing from the spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (4)
1. The method for constructing the outer wrapping type lower chord member web member assembled truss is characterized in that the outer wrapping type lower chord member web member assembled truss comprises an upper chord member, a web member and an outer wrapping type lower chord member, wherein the web member is arranged above the outer wrapping type lower chord member and connected with the outer wrapping type lower chord member, the upper chord member is arranged above the web member and connected with the web member, the web member comprises at least two prefabricated web frames, the single web frame is used as a basic unit for assembly, and the tail end of the web frame body is arranged in the outer wrapping type lower chord member;
the herringbone frame is made of concrete, is integrally prefabricated and comprises a first branch and a second branch, the axes of the first branch and the second branch are set to be at preset angles, the upper ends of the first branch and the second branch are connected into a whole, the herringbone frames are arranged along the axial direction of the outer wrapping type lower chord member, and the end parts of the adjacent herringbone frames are abutted against the end parts; the herringbone frame is used as the web member of the truss to be integrally sheared, the first branch limb and the second branch limb are only stressed by axial force, the upper chord member is horizontally stressed, the lower chord member is used as the lower tension chord member, compared with the integrally prefabricated truss, the truss form saves materials and lightens dead weight compared with the solid truss, but the die required by prefabrication is complex and expensive, and the complexity of the reinforcement in the whole truss is high, so that the advantages of the truss are partially offset, the web member of the truss is decomposed into simple basic units, the repetition rate is high, the die cost is saved, the reinforcement is standardized and simplified, the advantages of the solid truss and the integral truss are integrated, the defects of the truss are abandoned, and compared with the truss web member which is disassembled into a single tension or compression member, the truss form is unstable and complex and difficult to control, and the herringbone frame form has the advantages of the whole truss and the convenience advantage when being installed;
the outer wrapping type lower chord member herringbone frame web member assembling truss, and the upper chord member, the lower chord member and the herringbone frame web member are all prefabricated; the herringbone frame is provided with a first tail end and a second tail end, and the first tail end comprises a first limb and a second limb;
holes are formed in the upper chord member and the lower chord member, the upper end of the herringbone frame is arranged in the holes of the upper chord member, and wedging bodies are arranged in gaps in the holes; the first tail end of the lower part of the herringbone frame is arranged in a hole in the lower chord rod body, and an anti-slip bulge is arranged at the outer side of the frame body at the first tail end, or an anti-slip groove is arranged at the outer side of the frame body at the first tail end of the lower part of the herringbone frame; a rear slurry is arranged in a gap between the frame body at the first end of the herringbone frame and the outer wrapping type lower chord member and used for connecting the herringbone frame and the outer wrapping type lower chord member together; the joint of the outer wrapping type lower chord member and the herringbone frame is provided with an anti-slip key or an anti-slip groove;
the outer wrapping type lower chord member is a hollow pipe body, and the first end of the lower part of the herringbone frame is arranged in the rod body of the outer wrapping type lower chord member; a rib body is additionally arranged in the pipe body and used for applying prestress to stretch the outer wrapping type lower chord member;
the outer wrapping type lower chord member web member assembling truss is characterized in that a first tail end of the lower part of a herringbone frame is inserted into an outer wrapping type lower chord member from above, and rear slurry is formed by grouting in a gap between the herringbone frame and the outer wrapping type lower chord member, so that the herringbone frame and the lower chord member are fixed, and the assembling type herringbone frame web member is assembled;
the construction method of the outer-wrapping type lower chord member herringbone frame web member assembled truss comprises the following steps of:
the first step: simultaneously prefabricating the herringbone frame, the upper chord and the outsourcing lower chord and the end rod in a prefabricating factory in parallel;
and a second step of: transporting the prefabricated parts to an assembly site, firstly assembling the herringbone frame with the outer wrapping type lower chord member, placing the first end frame body of the herringbone frame into a reserved hole of the outer wrapping type lower chord member, and placing the rear slurry;
and a third step of: the upper chord member is paved on the herringbone frame, the second end of the herringbone frame is placed into the hole of the upper chord member, and the end of the herringbone frame is wedged by adopting a wedging body;
fourth step: placing a rib into the outer-wrapping type lower chord member body, and tensioning the rib so as to tension the lower chord member;
fifth step: and hoisting the assembled and integrated outer-wrapping type lower chord member web member assembly truss to a required position.
2. The method for constructing the web member assembled truss of the outer wrapping type lower chord member of claim 1, wherein the upper chord member and the lower chord member are arranged in a sectional manner, the chord member of each section is arranged as a chord section, holes are formed in the chord section, and the tail ends of the herringbone frames are arranged in the holes of the chord section.
3. The method for constructing the outer-wrapping type lower chord web member assembled truss according to claim 1, wherein end members for connecting the upper chord member and the lower chord member are arranged at the end portions of the outer-wrapping type lower chord web member assembled truss, the end members are vertically arranged and bear the pressure of the support, and the herringbone frame, the outer-wrapping type lower chord member and the end members are arranged in a vertical plane.
4. A method of constructing a web member fabricated truss of an outer-wrapped lower chord member according to any one of claims 1 to 3, wherein an anti-slip bolt is provided at a portion where the outer-wrapped lower chord member meets the web member, and the anti-slip bolt is configured to be fabricated so as to directly penetrate through the outer-wrapped lower chord member body and the end of the web member.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110936083.5A CN113605526B (en) | 2021-08-16 | 2021-08-16 | Construction method of outer wrapping type lower chord member herringbone frame web member assembly truss |
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| CN202110936083.5A CN113605526B (en) | 2021-08-16 | 2021-08-16 | Construction method of outer wrapping type lower chord member herringbone frame web member assembly truss |
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| CN113605526B true CN113605526B (en) | 2023-09-29 |
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| CN103206015A (en) * | 2013-03-23 | 2013-07-17 | 北京工业大学 | Assembled steel structure eccentric bracing frame system |
| CN204126053U (en) * | 2014-07-16 | 2015-01-28 | 宁夏大诚新型建筑材料有限公司 | Large span prestressed concrete T plate |
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| CN109779268A (en) * | 2019-02-25 | 2019-05-21 | 上海城建建设实业(集团)有限公司 | The construction method of fragment integrated form T plate |
| CN112609823A (en) * | 2020-12-03 | 2021-04-06 | 长安大学 | Steel frame structure internally filled with energy-consuming truss and installation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050225172A1 (en) * | 2004-04-12 | 2005-10-13 | Lionel Brightwell | Open web trimmable truss with self locking joint |
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2021
- 2021-08-16 CN CN202110936083.5A patent/CN113605526B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103206015A (en) * | 2013-03-23 | 2013-07-17 | 北京工业大学 | Assembled steel structure eccentric bracing frame system |
| CN204126053U (en) * | 2014-07-16 | 2015-01-28 | 宁夏大诚新型建筑材料有限公司 | Large span prestressed concrete T plate |
| CN109723184A (en) * | 2019-02-25 | 2019-05-07 | 上海城建建设实业(集团)有限公司 | Fragment integrated form T plate structure |
| CN109779268A (en) * | 2019-02-25 | 2019-05-21 | 上海城建建设实业(集团)有限公司 | The construction method of fragment integrated form T plate |
| CN112609823A (en) * | 2020-12-03 | 2021-04-06 | 长安大学 | Steel frame structure internally filled with energy-consuming truss and installation method thereof |
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| CN113605526A (en) | 2021-11-05 |
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