CN112900452A - Adjustable and rapidly-telescopic steel support loose end joint and using method thereof - Google Patents
Adjustable and rapidly-telescopic steel support loose end joint and using method thereof Download PDFInfo
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- CN112900452A CN112900452A CN202110200889.8A CN202110200889A CN112900452A CN 112900452 A CN112900452 A CN 112900452A CN 202110200889 A CN202110200889 A CN 202110200889A CN 112900452 A CN112900452 A CN 112900452A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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Abstract
The invention relates to the technical field of foundation pit engineering, in particular to an adjustable and rapidly-telescopic steel support loose end joint and a using method thereof, wherein the adjustable and rapidly-telescopic steel support loose end joint comprises an inner steel cylinder and an outer steel cylinder, and is characterized in that: interior steel cylinder and outer steel cylinder nest each other, outer steel cylinder side open and to have a pair of wedge opening, two wedge tooth tile insert the wedge opening, wedge tooth tile inboard be equipped with the tooth trace, be equipped with the tooth trace on the interior steel cylinder, the tooth trace of interior steel cylinder meshes with the tooth trace of wedge tooth tile mutually, its advantage lies in: the design that the inner steel cylinder and the outer steel cylinder are nested with each other is adopted, the adjustable and rapid telescopic function of the steel support is realized, and the effect of applying the prestress of the steel support stably is achieved; the design of inclined wedge-shaped openings and wedge-shaped tooth tiles is adopted, the function of micro-adjustment of the steel support is realized, the control difficulty of the original construction tool during operation is reduced, and the pre-stress precision is improved.
Description
Technical Field
The invention relates to the technical field of foundation pit engineering, in particular to an adjustable and rapidly-telescopic steel support loose end connector and a using method thereof.
Background
In the prior foundation pit steel support supporting construction in China, the traditional method is to erect a steel support and then apply prestress to enable the steel support to reach a balanced state, after the prestress is applied, the loose end is firmly fixed through a wedge iron top, the wedge iron is easy to lose and damage, the steel support axial force is easy to lose, and potential safety hazards exist. More neotype "keep carrying the head of living" bolt big, easy corrosion, difficult maintenance, manual operation is extremely inconvenient, uses the trouble, needs a plurality of personnel cooperation operations, and the operating efficiency is low, and the prestressing force precision of applying is unreliable.
Disclosure of Invention
The invention aims to: the adjustable and quick telescopic steel support loose end connector meets the requirement of steel support prestress application operation, improves prestress application precision, shortens the time required by steel support installation, disassembly and turnover, improves construction efficiency, and provides the adjustable and quick telescopic steel support loose end connector and the using method thereof.
In order to realize the purpose, the adjustable and rapidly telescopic steel support loose end joint comprises an inner steel cylinder and an outer steel cylinder, and is characterized in that: the inner steel cylinder and the outer steel cylinder are mutually nested, the side surface of the outer steel cylinder is provided with a pair of wedge-shaped openings, two wedge-shaped tooth tiles are inserted into the wedge-shaped openings, the inner sides of the wedge-shaped tooth tiles are provided with tooth marks, the inner steel cylinder is provided with tooth marks, and the tooth marks of the inner steel cylinder are meshed with the tooth marks of the wedge-shaped tooth tiles.
Preferably, the outer surface of the inner steel cylinder is provided with non-spiral tooth marks, the thread pitch is 10mm, and the depth of the tooth marks is 5 mm.
Preferably, the wedge-shaped opening transversely forms an included angle of 3.6 degrees with the cross section direction of the outer steel cylinder, the opening angle is 116 degrees, and the axial opening length is 110 mm.
Preferably, the opening angle of the wedge-shaped tooth shoe is 80 DEG degree
Preferably, the outer side of the wedge-shaped tooth tile is provided with an elastic steel sheet.
Preferably, the wedge-shaped tooth tile can rotate left and right in the wedge-shaped opening of the outer steel cylinder.
The use method of the adjustable and rapidly telescopic steel support loose end joint comprises the following steps:
s1, after earthwork excavation at a supporting position and erection of a standard steel-saving support are finished, integrally transporting an adjustable and quickly-telescopic steel support loose end connector to an installation position, enabling an outer steel cylinder to be connected with the standard steel-saving support, enabling a base of an inner steel cylinder to be tightly attached to an enclosure structure, and ensuring that the telescopic amount of the inner steel cylinder meets the requirement of pre-length (supporting axial force), otherwise, adjusting through a short steel support;
s2, after steel support adjustment is completed according to requirements, two prestressed oil cylinders are installed in a manual or mechanical matching mode, after various parameters and construction conditions are checked, the two prestressed oil cylinders simultaneously apply prestress according to designed axial force, at the moment, locking screws are loosened to cause tooth tiles to be bounced open and disengaged, and the inner steel cylinder moves in an outer steel cylinder in a telescopic mode;
s3, after the prestress oil cylinder reaches a specified reading, adjusting the wedge-shaped tooth tiles in the wedge-shaped openings at the two sides, and enabling the non-spiral tooth marks of the wedge-shaped tooth tiles and the non-spiral tooth marks of the inner steel cylinder to be just tightly meshed through rotating left and right in the wedge-shaped opening of the outer steel cylinder, so that the prestress loss is ensured to be within a reasonable range;
s4, after the wedge-shaped tooth tile is adjusted, the locking screws on the two sides are screwed down, no gap exists between the bottom surface of the screw cap of the construction locking screw and the outer surface of the wedge-shaped tooth tile, so that the wedge-shaped tooth tile is fixed in the wedge-shaped opening, the applied prestress is ensured to be stable, and the construction safety is ensured;
s5, after the installation is finished, contracting the two prestress oil cylinders, finishing the installation of the adjustable and quickly telescopic steel support loose end connector, monitoring the prestress of the reinforced steel support, and quickly adjusting the prestress of the steel support when abnormality exists;
s6, the dismounting process of the adjustable and quickly telescopic steel support loose end connector is the reverse process of the mounting process, and the next construction can be carried out by repeating the steps.
Compared with the prior art, the invention has the advantages that:
1. the design that the inner steel cylinder and the outer steel cylinder are nested with each other is adopted, the adjustable and rapid telescopic function of the steel support is realized, and the effect of applying the prestress of the steel support stably is achieved;
2. the design of inclined wedge-shaped openings and wedge-shaped tooth tiles is adopted, the function of micro-adjustment of the steel support is realized, the control difficulty of the original construction tool during operation is reduced, and the pre-stress precision is improved.
Drawings
FIG. 1 is a front view of the overall structure of the present invention;
FIG. 2 is a rear elevational view of the overall construction of the present invention;
FIG. 3 is a side view of the inner steel cylinder structure of the present invention;
FIG. 4 is a front view of the inner steel cylinder structure of the present invention;
FIG. 5 is a front view of the wedge shoe of the present invention;
FIG. 6 is a rear view of the wedge shoe of the present invention;
FIG. 7 is a side view of the wedge shoe of the present invention;
in the figure: 1. the inner steel cylinder 2, the prestress oil cylinder 3, the outer steel cylinder 4, the locking screw 5, the wedge-shaped tooth tile 1-1, the base 1-2, the non-spiral tooth trace 5-1, the non-spiral tooth trace 5-2 on the inner side of the tooth tile and the elastic sheet.
Detailed Description
The present invention is further described below in conjunction with the following drawings, the structure and principle of which will be apparent to those skilled in the art. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1: the invention designs an adjustable and rapidly-telescopic steel support loose end joint which comprises three core components, namely an inner steel cylinder, an outer steel cylinder, a pair of wedge-shaped tooth tiles, and locking screws and elastic steel sheets as other accessories.
The inner steel cylinder consists of a base and a non-spiral tooth mark steel cylinder, and is used as one of the stress main components of the steel support loose end, the base is in direct contact with the enclosure structure, the non-spiral tooth mark steel cylinder extends into the outer steel cylinder, and the inner steel cylinder and the outer steel cylinder are nested with each other. The wall thickness of the inner steel cylinder is 30mm, the outer surface of the inner steel cylinder is provided with non-spiral tooth marks, the thread pitch is 10mm, the depth of the tooth marks is 5mm, and the number of the tooth marks is usually 33 according to the requirement of actual conditions. The stress base is formed by customizing and processing a 30mm steel plate, the base is provided with a reinforced rib plate for reinforcing the integral rigidity of the inner steel cylinder, and jack operation panels are arranged on two sides of the base for prestress pressurization construction.
One end of the outer steel cylinder and the inner steel cylinder are combined into a main stress component of the steel support loose end in a nested mode, the other end of the outer steel cylinder is connected with the universal steel support, and the wall thickness is 30 mm. The steel outer cylinder is provided with a pair of wedge-shaped openings, the transverse included angle of the openings and the cross section direction of the outer steel cylinder is about 3.6 degrees, the opening angles are all 116 degrees, the length of the axial openings is 110mm, the wedge-shaped openings are used for a pair of wedge-shaped tooth bush working spaces, and six locking screws are arranged on two sides of each opening.
The wedge-shaped tooth tiles are totally two, the opening angle of each tooth tile is 80 degrees, and the rest sizes are consistent with the wedge-shaped openings. The inner side of the wedge-shaped tooth tile is also provided with non-spiral tooth marks which can be meshed with the tooth marks on the inner steel cylinder, the outer side of the wedge-shaped tooth tile is provided with an elastic steel sheet, and the wedge-shaped tooth tile can rotate in a wedge-shaped opening of the outer cylinder by a limited angle of 36 degrees from left to right.
Example 2: the use method of the adjustable and rapidly telescopic steel support loose end joint comprises the following steps:
s1, after earthwork excavation at a supporting position and erection of a standard steel-saving support are finished, integrally transporting an adjustable and quickly-telescopic steel support loose end connector to an installation position, enabling an outer steel cylinder to be connected with the standard steel-saving support, enabling a base of an inner steel cylinder to be tightly attached to an enclosure structure, and ensuring that the telescopic amount of the inner steel cylinder meets the requirement of pre-length (supporting axial force), otherwise, adjusting through a short steel support;
s2, after steel support adjustment is completed according to requirements, two prestressed oil cylinders are installed in a manual or mechanical matching mode, after various parameters and construction conditions are checked, the two prestressed oil cylinders simultaneously apply prestress according to designed axial force, at the moment, locking screws are loosened to cause tooth tiles to be bounced open and disengaged, and the inner steel cylinder moves in an outer steel cylinder in a telescopic mode;
s3, after the prestress oil cylinder reaches a specified reading, adjusting the wedge-shaped tooth tiles in the wedge-shaped openings at the two sides, and enabling the non-spiral tooth marks of the wedge-shaped tooth tiles and the non-spiral tooth marks of the inner steel cylinder to be just tightly meshed through rotating left and right in the wedge-shaped opening of the outer steel cylinder, so that the prestress loss is ensured to be within a reasonable range;
s4, after the wedge-shaped tooth tile is adjusted, the locking screws on the two sides are screwed down, no gap exists between the bottom surface of the screw cap of the construction locking screw and the outer surface of the wedge-shaped tooth tile, so that the wedge-shaped tooth tile is fixed in the wedge-shaped opening, the applied prestress is ensured to be stable, and the construction safety is ensured;
s5, after the installation is finished, contracting the two prestress oil cylinders, finishing the installation of the adjustable and quickly telescopic steel support loose end connector, monitoring the prestress of the reinforced steel support, and quickly adjusting the prestress of the steel support when abnormality exists;
s6, the dismounting process of the adjustable and quickly telescopic steel support loose end connector is the reverse process of the mounting process, and the next construction can be carried out by repeating the steps.
Claims (7)
1. The utility model provides an adjustable quick flexible end joint of steel shotcrete, includes an interior steel cylinder and an outer steel cylinder, its characterized in that: the inner steel cylinder and the outer steel cylinder are mutually nested, the side surface of the outer steel cylinder is provided with a pair of wedge-shaped openings, two wedge-shaped tooth tiles are inserted into the wedge-shaped openings, the inner sides of the wedge-shaped tooth tiles are provided with tooth marks, the inner steel cylinder is provided with tooth marks, and the tooth marks of the inner steel cylinder are meshed with the tooth marks of the wedge-shaped tooth tiles.
2. The adjustable, quick telescoping, steel support loose end joint of claim 1, wherein: the outer surface of the inner steel cylinder is provided with non-spiral tooth marks, the thread pitch is 10mm, and the depth of the tooth marks is 5 mm.
3. The adjustable, quick telescoping, steel support loose end joint of claim 1, wherein: the wedge-shaped opening transversely is 3.6 contained angles with outer steel cylinder cross section direction, and the opening angle is 116, and axial opening length 110 mm.
4. The adjustable, quick telescoping, steel support loose end joint of claim 1, wherein: the opening angle of the wedge-shaped tooth tile is 80 degrees.
5. The adjustable, quick telescoping, steel support loose end joint of claim 1, wherein: and an elastic steel sheet is arranged on the outer side of the wedge-shaped tooth tile.
6. The adjustable, quick telescoping, steel support loose end joint of claim 1, wherein: the wedge-shaped tooth tile can rotate left and right in the wedge-shaped opening of the outer steel cylinder.
7. A use method of an adjustable and rapidly telescopic steel support loose end joint is characterized in that: the method comprises the following steps:
s1, after earthwork excavation at a supporting position and erection of a standard steel-saving support are finished, integrally transporting an adjustable and quickly-telescopic steel support loose end connector to an installation position, enabling an outer steel cylinder to be connected with the standard steel-saving support, enabling a base of an inner steel cylinder to be tightly attached to an enclosure structure, and ensuring that the telescopic amount of the inner steel cylinder meets the requirement of pre-length (supporting axial force), otherwise, adjusting through a short steel support;
s2, after steel support adjustment is completed according to requirements, two prestressed oil cylinders are installed in a manual or mechanical matching mode, after various parameters and construction conditions are checked, the two prestressed oil cylinders simultaneously apply prestress according to designed axial force, at the moment, locking screws are loosened to cause tooth tiles to be bounced open and disengaged, and the inner steel cylinder moves in an outer steel cylinder in a telescopic mode;
s3, after the prestress oil cylinder reaches a specified reading, adjusting the wedge-shaped tooth tiles in the wedge-shaped openings at the two sides, and enabling the non-spiral tooth marks of the wedge-shaped tooth tiles and the non-spiral tooth marks of the inner steel cylinder to be just tightly meshed through rotating left and right in the wedge-shaped opening of the outer steel cylinder, so that the prestress loss is ensured to be within a reasonable range;
s4, after the wedge-shaped tooth tile is adjusted, the locking screws on the two sides are screwed down, no gap exists between the bottom surface of the screw cap of the construction locking screw and the outer surface of the wedge-shaped tooth tile, so that the wedge-shaped tooth tile is fixed in the wedge-shaped opening, the applied prestress is ensured to be stable, and the construction safety is ensured;
s5, after the installation is finished, contracting the two prestress oil cylinders, finishing the installation of the adjustable and quickly telescopic steel support loose end connector, monitoring the prestress of the reinforced steel support, and quickly adjusting the prestress of the steel support when abnormality exists;
s6, the dismounting process of the adjustable and quickly telescopic steel support loose end connector is the reverse process of the mounting process, and the next construction can be carried out by repeating the steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110200889.8A CN112900452A (en) | 2021-02-23 | 2021-02-23 | Adjustable and rapidly-telescopic steel support loose end joint and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110200889.8A CN112900452A (en) | 2021-02-23 | 2021-02-23 | Adjustable and rapidly-telescopic steel support loose end joint and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112900452A true CN112900452A (en) | 2021-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110200889.8A Pending CN112900452A (en) | 2021-02-23 | 2021-02-23 | Adjustable and rapidly-telescopic steel support loose end joint and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112900452A (en) |
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2021
- 2021-02-23 CN CN202110200889.8A patent/CN112900452A/en active Pending
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