CN111927464B - Prefabricated assembled shaft inner supporting structure - Google Patents
Prefabricated assembled shaft inner supporting structure Download PDFInfo
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- CN111927464B CN111927464B CN202010819455.1A CN202010819455A CN111927464B CN 111927464 B CN111927464 B CN 111927464B CN 202010819455 A CN202010819455 A CN 202010819455A CN 111927464 B CN111927464 B CN 111927464B
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- prefabricated
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- embedded steel
- waist beam
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 41
- 239000010959 steel Substances 0.000 claims abstract description 41
- 238000010276 construction Methods 0.000 claims abstract description 25
- 238000003466 welding Methods 0.000 claims abstract description 10
- 238000009417 prefabrication Methods 0.000 claims abstract description 7
- 239000004567 concrete Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 10
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 210000003205 muscle Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D5/00—Lining shafts; Linings therefor
- E21D5/11—Lining shafts; Linings therefor with combinations of different materials, e.g. wood, metal, concrete
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Rod-Shaped Construction Members (AREA)
Abstract
The invention discloses a prefabricated assembly type shaft inner supporting structure which comprises a prefabricated waist beam, wherein connecting ends are arranged at two ends of the prefabricated waist beam, each connecting end comprises an embedded steel plate and an embedded steel bar connector, the embedded steel plates of two adjacent connecting ends are connected through I-shaped steel in a welding mode, and the embedded steel bar connectors of two adjacent connecting ends are connected through main lap joints. The prefabricated vertical shaft inner supporting structure can perform centralized prefabrication on the waist beam in a professional prefabrication field, so that the construction period is saved, and the management pressure of construction processes such as environmental protection, pollution control and haze reduction is reduced; and the construction period of the subway is shortened through a prefabricating construction process.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a prefabricated vertical shaft inner supporting structure.
Background
At present, most of reinforced concrete waist rails of subway construction vertical shafts are constructed by a cast-in-place method. The construction process of the cast-in-place method needs 7 days, 28 days after the pouring of each waist rail is finished according to the specification, the next procedure can be carried out after the concrete strength grade meets the requirement, and the construction period of each waist rail is 35 days.
In view of this, a design capable of solving the problem of long construction period of the cast-in-place wale is needed.
Disclosure of Invention
The invention aims to provide a prefabricated vertical shaft inner supporting structure, which solves the problem of long construction period of a cast-in-place waist rail.
The technical problem to be solved by the invention is realized by the following technical scheme:
the utility model provides a prefabricated assembled shaft inner supporting structure, includes prefabricated waist rail, prefabricated waist rail's both ends are provided with the link, the link includes that embedded steel plate and embedded steel bar plug into the ware, through I-steel welded connection between the embedded steel plate of two adjacent links, links to each other through the main muscle of overlap joint between the embedded steel bar plug into the ware of two adjacent links.
Preferably, in the above technical solution, a prestress application point is disposed between the two adjacent connection ends, and the hydraulic jack is detachably disposed at the prestress application point and applies pressure.
Preferably, in the above technical scheme, the precast wale includes a wale main rib and a stirrup, and the stirrup is fastened to the wale main rib.
Preferably, in the above technical solution, the number of the i-beams is 4, and the i-beams are 20a i-beams.
Preferably, in the above technical solution, the pre-buried steel plate is a Q235 steel plate with a thickness of 20 mm.
Preferably, in the above technical solution, the width of the precast wale is 800mm.
A construction method for prefabricating an assembled shaft inner supporting structure comprises the following steps:
(1) Prefabricating the wale in a professional prefabricating field according to construction requirements, and ensuring that the quality and the appearance of the wale meet the standard requirements;
(2) After the construction vertical shaft is excavated to the designed elevation of the waist rail, hoisting the prefabricated waist rail by adopting a crane;
(3) Pre-burying a Q235 steel plate with the thickness of 20mm and a pre-buried steel bar connector at the connecting point of the end of the prefabricated waist beam, welding two adjacent connecting points of the prefabricated waist beam by adopting 4 pieces of 20a I-shaped steel, and installing and welding lap joint main bars on the steel bar connector;
(4) And after the prestress application is finished and the welding of the connecting points is finished, pouring of wet joints is carried out.
Preferably, in the above technical solution, the wet joint is cast with C50 micro-expansion concrete.
The technical scheme of the invention has the following beneficial effects:
compared with the prior art, the prefabricated vertical shaft internal support structure can perform centralized prefabrication on of the waist rail in a professional prefabrication field, so that the construction period is saved, and the management pressure of construction processes such as environmental protection, pollution control and haze reduction is reduced; and the construction period of the subway is shortened through a prefabricating construction process.
Drawings
Fig. 1 is a schematic view of an internal support structure of a prefabricated assembled shaft of the present invention.
Fig. 2 is a schematic view of the prefabricated wale end connection point according to the present invention.
Fig. 3 is a cross-sectional view of a prefabricated wale end joint according to the present invention.
Wherein: 1-prefabricating a waist rail, 2-pre-buried steel plates, 3-pre-buried steel bar connectors, 4-I-shaped steel, 5-lap joint main bars, 6-hydraulic jacks, 7-waist rail main bars, 8-stirrups and 9-connecting ends.
Detailed Description
The following detailed description of specific embodiments of the invention is provided to facilitate a further understanding of the invention.
The utility model provides a prefabricated assembled shaft inner supporting structure, includes prefabricated waist rail 1, prefabricated waist rail 1's both ends head is provided with link 9, link 9 includes pre-buried steel sheet 2 and embedded steel bar connector 3, and through I-steel 4 welded connection between the pre-buried steel sheet 2 of two adjacent links, it links to each other through overlap joint owner muscle 5 between the pre-buried steel bar connector 3 of two adjacent links.
Further, a prestress applying point is provided between the adjacent two connection ends 9, and the hydraulic jack 6 is detachably provided at the prestress applying point and applies pressure.
Further, the prefabricated wale 1 comprises a wale main rib 7 and a hoop rib 8, and the hoop rib is fixedly connected with the wale main rib 7.
Preferably, the number of h-beams 4 is 4, which is 20a h-beam. The pre-buried steel plate 2 is a Q235 steel plate with the thickness of 20 mm. The width of the precast wale 1 is 800mm. Of course, the invention is not limited thereto, and those skilled in the art can select the appropriate size according to the needs.
A construction method for prefabricating an assembled shaft inner supporting structure comprises the following steps:
(1) Prefabricating the wale in a professional prefabricating field according to construction requirements, and ensuring that the quality and the appearance of the wale meet the standard requirements;
(2) After the construction vertical shaft is excavated to the designed elevation of the waist rail, hoisting the prefabricated waist rail by using a crane;
(3) Pre-burying a Q235 steel plate with the thickness of 20mm and a pre-buried steel bar connector at the connecting point of the end of the prefabricated waist beam, welding two adjacent connecting points of the prefabricated waist beam by adopting 4 pieces of 20a I-shaped steel, and installing and welding lap joint main bars on the steel bar connector;
(4) The method is characterized in that a prestress application point is arranged in each direction of the waist beam main beam and the opposite supporting beam, after prestress application is completed, wet joints are poured after welding of connection points is completed, and the wet joints are poured by C50 micro-expansion concrete.
The prefabricated vertical shaft inner supporting structure can perform centralized prefabrication on the waist beam in a professional prefabrication field, saves the construction period, and reduces the construction process management pressure of environmental protection, pollution control, haze reduction and the like.
Although the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited thereto, and various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (4)
1. The prefabricated vertical shaft inner supporting structure is characterized by comprising a prefabricated waist beam (1), wherein connecting ends (9) are arranged at two ends of the prefabricated waist beam (1), each connecting end (9) comprises an embedded steel plate (2) and an embedded steel bar connector (3), the embedded steel plates (2) of two adjacent connecting ends are welded and connected through I-shaped steel (4), and the embedded steel bar connectors (3) of two adjacent connecting ends are connected through main lap joints (5); a prestress application point is arranged between the two adjacent connecting ends (9), and the hydraulic jack (6) is detachably arranged at the prestress application point and applies pressure; the prefabricated waist rail (1) comprises a waist rail main rib (7) and a hoop rib (8), and the hoop rib (8) is fastened on the waist rail main rib (7).
2. The prefabricated shaft internal support structure according to claim 1, characterized in that said i-beams (4) are 4 in number, which are 20a i-beams; the embedded steel plate (2) is a Q235 steel plate with the thickness of 20 mm; the width of the prefabricated wale (1) is 800mm.
3. A construction method of an inner support structure for a prefabricated shaft according to any one of claims 1 to 2, comprising the steps of:
(1) Prefabricating the waist beam in a professional prefabrication field according to construction requirements, and ensuring that the quality and the appearance of the waist beam meet the standard requirements;
(2) After the construction vertical shaft is excavated to the designed elevation of the waist rail, hoisting the prefabricated waist rail by using a crane;
(3) Pre-burying a Q235 steel plate with the thickness of 20mm and a pre-buried steel bar connector at the connecting point of the end of the prefabricated waist beam, welding two adjacent connecting points of the prefabricated waist beam by adopting 4 pieces of 20a I-shaped steel, and installing and welding lap joint main bars on the steel bar connector;
(4) And after the prestress application is finished and the welding of the connecting points is finished, pouring of wet joints is carried out.
4. The construction method of the internal support structure of the prefabricated vertical shaft according to claim 3, wherein the wet joints are cast using C50 micro-expansive concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010819455.1A CN111927464B (en) | 2020-08-14 | 2020-08-14 | Prefabricated assembled shaft inner supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010819455.1A CN111927464B (en) | 2020-08-14 | 2020-08-14 | Prefabricated assembled shaft inner supporting structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111927464A CN111927464A (en) | 2020-11-13 |
| CN111927464B true CN111927464B (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010819455.1A Active CN111927464B (en) | 2020-08-14 | 2020-08-14 | Prefabricated assembled shaft inner supporting structure |
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| Country | Link |
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| CN (1) | CN111927464B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204898717U (en) * | 2015-08-18 | 2015-12-23 | 中铁第一勘察设计院集团有限公司 | Shaft major structure of built -in lattice stand |
| CN208618420U (en) * | 2018-04-28 | 2019-03-19 | 厦门源昌城建集团有限公司 | A kind of assembled waist rail for retaining structure |
| CN108678751B (en) * | 2018-05-16 | 2020-04-07 | 北京中地盾构工程技术研究院有限公司 | Assembly type construction method of shield cutter head manhole by jacking and excavating firstly |
| CN110093929A (en) * | 2019-05-20 | 2019-08-06 | 中铁隧道局集团有限公司 | A kind of underground engineering is along practice construction method and structure |
| CN110258576B (en) * | 2019-05-28 | 2021-04-09 | 安徽省公路桥梁工程有限公司 | Construction method of foundation pit enclosure support system |
| CN111395351B (en) * | 2020-02-25 | 2022-07-22 | 中铁第四勘察设计院集团有限公司 | Assembled supporting structure of foundation pit and supporting construction method |
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- 2020-08-14 CN CN202010819455.1A patent/CN111927464B/en active Active
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| CN111927464A (en) | 2020-11-13 |
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