CN113789811A - Temporary fastening connection system for prefabricated large components - Google Patents
Temporary fastening connection system for prefabricated large components Download PDFInfo
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- CN113789811A CN113789811A CN202111096347.7A CN202111096347A CN113789811A CN 113789811 A CN113789811 A CN 113789811A CN 202111096347 A CN202111096347 A CN 202111096347A CN 113789811 A CN113789811 A CN 113789811A
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- prefabricated
- anchor
- prestressed
- temporary fastening
- anchor beam
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/10—Tunnels or galleries specially adapted to house conduits, e.g. oil pipe-lines, sewer pipes ; Making conduits in situ, e.g. of concrete ; Casings, i.e. manhole shafts, access or inspection chambers or coverings of boreholes or narrow wells
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
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Abstract
The invention discloses a temporary fastening and connecting system for a large prefabricated part, which comprises a large prefabricated part, wherein the fastening and connecting system comprises anchor beams, the anchor beams which are positioned on two end surfaces of the large prefabricated part and correspond to each other in position form a group, the anchor beams are symmetrically provided with a plurality of groups, and prestressed ribs are arranged on the inner side and the outer side of each group of anchor beams on the large prefabricated part; the two sides of one side surface of the large-scale prefabricated part are respectively provided with a beam parallel to the prestressed tendons, the two ends of the beam are respectively provided with a hanging stud, and the hanging studs and the prestressed tendons are vertically arranged and penetrate through the middle part of the anchor beam; after the two large prefabricated components are respectively provided with the fastening and connecting systems, the two large prefabricated components are butted, and the prestressed tendons are prestressed and tensioned after penetrating through the anchor beams on the two large prefabricated components. The fastening and connecting system can be suspended and installed at any set height, so that the prestressed duct or the tensioning toothed plate is effectively prevented from being arranged on the original concrete member, the repeated utilization can be realized, and the cost is low.
Description
Technical Field
The invention relates to the technical field of temporary fastening of large prefabricated components, in particular to a temporary fastening and connecting system for large prefabricated components.
Background
During the construction, installation, test and other works of civil engineering structures, it is often necessary to temporarily fasten blocks of some large prefabricated components, and the prestressed tension steel bars are a temporary fastening measure widely used.
At present, prestressed reinforcements used for temporarily fastening large prefabricated components often penetrate through reserved holes in the prefabricated concrete components, and the prestressed stress is transmitted to the end faces of the concrete components through an anchorage device and a lower backing plate thereof in a tensioning and anchoring state; some concrete members are prefabricated by using templates to manufacture toothed plates, and the prestressed steel bars are anchored on the end faces of the toothed plates. The stresses caused by the local pressure of the anchorage in the lower local bearing zone of the anchor in the beam end region (end block) where its longitudinal length corresponds approximately to one beam height are complex and cracking problems often occur when the transverse tensile stresses produced by the anchorage exceed the tensile strength of the concrete. In order to disperse the overlarge compressive stress of the anchoring end of the prestressed reinforcement, an existing temporary fastening system often needs to be additionally provided with a steel bearing base plate, and the cost is increased. In order to avoid setting a backing plate, in some applications, a large-sized and full-length end surface anchoring piece is adopted to disperse stress, so that the stability in tensioning is ensured; the existing method has the disadvantages of large steel consumption, heavy weight, inconvenient operation, and increased labor cost and energy consumption.
Disclosure of Invention
The invention provides a temporary fastening and connecting system for prefabricated large components, and the prior art has the following problems of large steel consumption, heavy weight, inconvenience in operation, high cost and increase of labor cost and energy consumption.
To solve the above technical problem, an embodiment of the present invention provides the following solutions:
the embodiment of the invention provides a temporary fastening and connecting system for prefabricating a large member, which comprises a large prefabricated member, wherein the fastening and connecting system comprises anchor beams, the anchor beams which are positioned on two end surfaces of the large prefabricated member and correspond to each other in position form a group, the anchor beams are symmetrically provided with a plurality of groups, and prestressed tendons are arranged on the inner side and the outer side of the large prefabricated member on each group of anchor beams;
beams parallel to the prestressed tendons are respectively installed on two sides of one side face of the large prefabricated part, hanging studs are respectively installed at two ends of each beam, and the hanging studs and the prestressed tendons are vertically arranged and penetrate through the middle of the anchor beam;
after the fastening and connecting systems are respectively installed on the two large prefabricated components, the two large prefabricated components are in butt joint, and the prestressed tendons are prestressed and tensioned after penetrating through anchor beams on the two large prefabricated components.
Preferably, the anchor beam comprises a transverse anchor beam, a bolt hole is formed in the center of a mid-span web plate of the transverse anchor beam, and the hanging stud is inserted into the bolt hole and then fixed by a nut.
Preferably, after the prestressed tendons penetrate through anchor beams on the two large prefabricated components, the water-stopping rubber strips between the two large prefabricated components are compressed and squeezed tightly.
Preferably, stud round holes are respectively formed in two ends of the beam, and the hanging studs are inserted into the stud round holes, penetrate through the middle of the anchor beam and are fixed through nuts.
Preferably, the length of the anchor beam is 50cm from the thickness of the large prefabricated part to the two ends of the large prefabricated part.
Preferably, the anchor beam further comprises a vertical anchor beam, hanging channel steel is welded at two ends of a flange plate of the vertical anchor beam, and the hanging channel steel is lapped at the end part of the large-scale prefabricated part.
Preferably, a prestressed reinforcement hole is formed in the middle of the transverse anchor beam, and the prestressed reinforcement penetrates through the prestressed reinforcement hole.
Preferably, a prestressed reinforcement hole is formed in the middle of the vertical anchor beam, and the prestressed reinforcement penetrates through the prestressed reinforcement hole.
Preferably, a reinforcing steel plate is locally welded near the prestressed reinforcement hole on the transverse anchor beam.
Preferably, a reinforcing steel plate is welded locally near the prestressed reinforcement hole on the vertical anchor beam.
The scheme of the invention at least comprises the following beneficial effects:
in the scheme, the fastening connection system is suspended and installed at any set height through the anchor beam, the hanging stud and the nut, and the temporary fastening requirements of large prefabricated components can be met, such as temporary fastening during a water-saving test of the prefabricated assembly type pipe gallery and the like; the anchor beam can be repeatedly used, so that the cost of frequently temporarily fastening the prefabricated large component is reduced; the structure design is simple and reliable, the operation is convenient, the efficiency of the temporary fastening work of the large prefabricated component is improved, and the temporary fastening in the large industrial prefabricated component is convenient to apply. The design of the anchor beam can effectively avoid the arrangement of a prestressed duct or a tensioning toothed plate on the original concrete member, thereby simplifying the prestressed tensioning work; through a plurality of short and small anchor beams, the flexible anchoring of the temporary prestressed reinforcement is realized, the position of an anchoring point is convenient to adjust, the anchoring connection mode can be simplified, the anchoring form can be changed (combined randomly), and the temporary fastening of the large-scale prefabricated part can achieve an ideal effect.
Drawings
FIG. 1 is a perspective view of a temporary fastening system of the present invention that may be used to prefabricate large structures;
FIG. 2 is a schematic view of the position of the vertical anchor beams of the temporary fastening connection system of the present invention that can be used to prefabricate large structures;
FIG. 3 is a schematic view of the location of the transverse anchor beams of the temporary fastening connection system of the present invention that can be used for prefabricated large components;
FIG. 4 is a schematic view of an anchoring area of an anchor beam of the temporary fastening connection system for prefabricating large elements according to the present invention, at the end surface of the large prefabricated element;
FIG. 5 is a front view of a transverse anchor beam of the temporary fastening connection system of the present invention that may be used to prefabricate large structures;
FIG. 6 is a top view of a transverse anchor beam of the present invention that may be used in a temporary fastening system for prefabricated large units;
FIG. 7 is a front view of a vertical anchor beam of the present invention that may be used to prefabricate a temporary fastening system for large structures;
FIG. 8 is a top view of a vertical anchor beam of the present invention that may be used to prefabricate the temporary fastening system for large structures;
FIG. 9 is a cross-sectional view A-A of a transverse anchor beam of the temporary fastening connection system of the present invention that may be used to prefabricate large structures;
FIG. 10 is a cross-sectional view A-A of a transverse anchor beam of the temporary fastening connection system of the present invention that may be used to prefabricate large structures;
FIG. 11 is a C-C cross-sectional view of a vertical anchor beam of the present invention that may be used to prefabricate the temporary fastening system for large structures;
FIG. 12 is a D-D cross-sectional view of a vertical anchor beam of the present invention that may be used to prefabricate the temporary fastening system for large structures;
FIG. 13 is a front view of an anchor beam of the present invention that may be used to prefabricate a temporary fastening system for large structures;
FIG. 14 is a top plan view of an anchor beam of the present invention that may be used in a temporary fastening system for prefabricated large components;
fig. 15 is a left side view of an anchor beam of the temporary fastening connection system of the present invention, which can be used for prefabricating large elements.
Reference numerals:
1. large prefabricated parts; 3. a transverse anchor beam; 31. anchor beam H-shaped steel; 311. a reinforcing steel plate; 312. bolt holes; 313. hanging channel steel; 341. pre-stress rib holes; 4. a vertical anchor beam; 5. a beam; 51. a stud circular hole; 6. a rib; 7. hanging the stud; 8. and a nut.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1 to 15, the present embodiment provides a temporary fastening connection system for a large prefabricated component, which includes a large prefabricated component 1, the fastening connection system includes anchor beams 5, the anchor beams 5 located at two end surfaces of the large prefabricated component 1 and corresponding in position form a group, the anchor beams 5 are symmetrically provided with a plurality of groups, and prestressed tendons 6 are installed at the inner and outer sides of the large prefabricated component 1 on each group of anchor beams 5; the two sides of one side surface of the large-scale prefabricated part 1 are respectively provided with a beam 5 parallel to the prestressed tendon 6, the two ends of the beam 5 are respectively provided with a hanging stud 7, and the hanging studs 7 are perpendicular to the prestressed tendon 6 and penetrate through the middle part of the anchor beam 5; after the two large prefabricated components 1 are respectively provided with the fastening and connecting systems, the two large prefabricated components 1 are butted, and the prestressed tendons 6 pass through the anchor beams 5 on the two large prefabricated components 1 to perform prestressed tensioning. The fastening connection system of the embodiment is suspended and installed at any set height through the anchor beam 5, the hanging stud 7 and the nut 8, and can meet the temporary fastening requirement of the large prefabricated part 1, such as temporary fastening during a water-saving test of the prefabricated assembly type pipe gallery; the anchor beam 5 can be repeatedly used, so that the cost of frequently temporarily fastening the prefabricated large component is reduced; the structure is simple and reliable in design and convenient to operate, the efficiency of temporary fastening work of the large prefabricated part is improved, and the temporary fastening work in the large industrial prefabricated part is facilitated; the anchor beam 5 can effectively avoid arranging a prestressed duct or a tensioning toothed plate on the original concrete member, thereby simplifying the prestressed tensioning work; through a plurality of short and small anchor beams 5, the flexible anchoring of the temporary prestressed reinforcement 6 is realized, the positions of anchoring points are convenient to adjust, the anchoring connection mode can be simplified, the anchoring form can be changed (combined randomly), and the temporary fastening of the large-scale prefabricated part 1 can achieve an ideal effect.
As shown in fig. 5 to 12, the tendon 6 of the present embodiment passes through the anchor beam 5 on the two large prefabricated parts 1, and then compresses and squeezes the water-stop rubber strip between the two large prefabricated parts 1. Stud round holes 51 are respectively arranged at two ends of the beam 5, and the hanging studs 7 are inserted into the stud round holes 51, penetrate through the middle part of the anchor beam 5 and then are fixed by nuts 8. The anchor beam 5 comprises a transverse anchor beam 3 and a vertical anchor beam 4, and stud round holes 51 are respectively arranged at two ends of the transverse anchor beam 3 and the vertical anchor beam 4. The middle parts of the transverse anchor beam 3 and the vertical anchor beam 4 are provided with prestressed tendon 6 holes 341, and the prestressed tendon 6 penetrates through the prestressed tendon 6 holes 341. And reinforcing steel plates 311 are locally welded near the holes 341 of the prestressed tendons 6 on the transverse anchor beam 3 and the vertical anchor beam 4 so as to increase the rigidity of the anchor beam 5. The central position of the midspan web of the transverse anchor beam 3 is provided with a bolt hole 312, and the hanging stud 7 is inserted into the bolt hole 312 and then fixed by a nut 8, preferably a backing plate and the nut 8. Hanging channel steel 313 is welded at two ends of a flange plate of the vertical anchor beam 4, and the hanging channel steel 313 is lapped at the end part of the large-scale prefabricated part 1. The anchor beam 5 comprises an anchor beam H-section steel 31.
The length of the anchor beam 5 of this embodiment is 50cm extending to both ends of the large-sized precast member 1 on the basis of the thickness thereof. The length of the anchor beam 5 is determined so as to meet the anchoring force transmission requirement and ensure that the prestressed reinforcement 6 does not interfere with other parts. When the strength requirement is met, the transverse anchor beam 3, the vertical anchor beam 4 and the reinforced steel plate 311 can be made of Q235-grade steel, and the reinforced steel plate 311 is connected with the flange plate of the H-shaped steel through a groove weld; fillet welds are used between the H-beam flange plates and the reinforced steel plates 311. The hanging channel steel 313 is No. 5 channel steel 80mm long. The prestressed tendons 6 are finish-rolled deformed steel bar prestressed tendons 6.
The working process of the temporary fastening connection system for prefabricated large components of the invention is as follows:
the vertical anchor beam 4 is hung at the position set by the upper flange and the lower flange among the large-scale prefabricated parts 1 through a hanging point 313 of a hanging channel steel welded on the flange plate, and then penetrates through the prestressed tendons 6, and is provided with a sleeve;
erecting a groove beam 5 on a large prefabricated part 1, arranging 12mm round holes at the end parts of the beam 5 extending out of the large prefabricated part 1, arranging stud round holes 51 at two ends of the beam 5, penetrating hanging studs 7 with the diameter of 10mm in the vertical direction of the stud round holes 51, randomly placing transverse anchor beams 3 at specified positions of the large prefabricated part 1, and enabling the hanging studs 7 to penetrate through bolt holes 312 of the transverse anchor beams 3 and be fixed by nuts 8; the anchor point positions can be combined and adjusted at will through the steps, and the flexible arrangement and the operation are convenient;
the anchor beam 5 is erected at the fixed positions of two large-scale prefabricated parts 1 which are connected in advance, the finish rolling deformed steel bar prestressed tendons 6 penetrate into prestressed tendon 6 holes 341 reserved at two ends of the anchor beam 5, the finish rolling deformed steel bar prestressed tendons 6 are subjected to prestress tensioning by using a feed-through tensioning jack and an oil pump, water stop rubber strips between pipe joints are compressed and squeezed, and the two prefabricated pipe joints are well connected.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A temporary fastening and connecting system for large prefabricated components comprises large prefabricated components and is characterized in that the fastening and connecting system comprises anchor beams, wherein the anchor beams which are positioned on two end faces of the large prefabricated components and correspond to each other in position form a group, the anchor beams are symmetrically provided with a plurality of groups, and prestressed tendons are arranged on the anchor beams of each group at the inner side and the outer side of the large prefabricated components;
beams parallel to the prestressed tendons are respectively installed on two sides of one side face of the large prefabricated part, hanging studs are respectively installed at two ends of each beam, and the hanging studs and the prestressed tendons are vertically arranged and penetrate through the middle of the anchor beam;
after the fastening and connecting systems are respectively installed on the two large prefabricated components, the two large prefabricated components are in butt joint, and the prestressed tendons are prestressed and tensioned after penetrating through anchor beams on the two large prefabricated components.
2. The temporary fastening connection system for prefabricated large members as claimed in claim 1, wherein said anchor beam comprises a transverse anchor beam, a bolt hole is formed at a central position of a midspan web of said transverse anchor beam, and said hanging stud is fixed by a nut after being inserted into said bolt hole.
3. A temporary fastening and connecting system for prefabricated large members according to claim 1, wherein after the prestressed tendons pass through the anchor beams on the two large prefabricated members, the waterproof rubber strips between the two large prefabricated members are compressed and squeezed.
4. The temporary fastening connection system for prefabricated large members as claimed in claim 1, wherein stud circular holes are respectively formed at both ends of the beam, and the hanging stud is inserted into the stud circular hole, passes through the middle of the anchor beam and is fixed by a nut.
5. A temporary fastening and connecting system for prefabricated large members according to claim 1, wherein said anchor beam has a length extended by 50cm toward both ends based on the thickness of said large prefabricated member.
6. The temporary fastening and connecting system for prefabricated large members as claimed in claim 2, wherein said anchor beam further comprises a vertical anchor beam, hanging channel steel is welded to both ends of a flange plate of said vertical anchor beam, and said hanging channel steel is lapped on the end portion of said large prefabricated member.
7. A temporary fastening connection system for prefabricated large members according to claim 2, wherein a tendon hole is provided at a middle portion of the transverse anchor beam, and the tendon passes through the tendon hole.
8. A temporary fastening connection system for prefabricated large members according to claim 6, wherein a prestressed tendon hole is provided at the middle of said vertical anchor beam, and said prestressed tendon passes through said prestressed tendon hole.
9. A temporary fastening and connecting system for prefabricated large members according to claim 7, wherein a reinforcement steel plate is locally welded near the prestressed reinforcement holes of the transverse anchor beams.
10. A temporary fastening and connecting system for prefabricated large members according to claim 8, wherein a reinforcement steel plate is locally welded near a prestressed reinforcement hole on the vertical anchor beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111096347.7A CN113789811B (en) | 2021-09-16 | 2021-09-16 | Temporary fastening connection system for prefabricated large components |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111096347.7A CN113789811B (en) | 2021-09-16 | 2021-09-16 | Temporary fastening connection system for prefabricated large components |
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| CN113789811A true CN113789811A (en) | 2021-12-14 |
| CN113789811B CN113789811B (en) | 2022-04-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114808737A (en) * | 2022-05-20 | 2022-07-29 | 中铁四局集团第二工程有限公司 | Single-end tensioning vertical prestress positioning tensioning system and tensioning method |
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| CN113789811B (en) | 2022-04-26 |
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