CN211777497U - Shield constructs section of jurisdiction hole for hoist built-in fitting position arrangement of reinforcement and improves structure - Google Patents
Shield constructs section of jurisdiction hole for hoist built-in fitting position arrangement of reinforcement and improves structure Download PDFInfo
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- CN211777497U CN211777497U CN201922476818.1U CN201922476818U CN211777497U CN 211777497 U CN211777497 U CN 211777497U CN 201922476818 U CN201922476818 U CN 201922476818U CN 211777497 U CN211777497 U CN 211777497U
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- 230000002787 reinforcement Effects 0.000 title claims abstract description 44
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 40
- 239000010959 steel Substances 0.000 claims abstract description 40
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 21
- 238000004873 anchoring Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 9
- 239000011241 protective layer Substances 0.000 abstract description 2
- 238000011160 research Methods 0.000 abstract description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 15
- 229920003023 plastic Polymers 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Research shows that most segment concrete damage surface cones do not penetrate through the transverse and longitudinal main reinforcements, the transverse and longitudinal steel bar protective layers are large, the segment central steel bar space is large, and the concrete damage surfaces do not penetrate through the transverse and longitudinal steel bar main reinforcements. This patent optimizes the improvement to shield structure section of jurisdiction hole for hoist built-in fitting position section of jurisdiction arrangement of reinforcement, the reinforcing bar net that the inboard of innovation at the outer spiral reinforcement of existing hole for hoist built-in fitting increases L type vertical reinforcement 1, increase trapezoidal shape reinforcing bar around the hole for hoist built-in fitting and constitute has improved the atress condition of concrete and reinforcing bar around the hole for hoist, reduces the possibility that section of jurisdiction hole for hoist built-in fitting position concrete destruction takes place, improves the security.
Description
Technical Field
This patent relates to shield tunnel section of jurisdiction production technical field, specifically uses the hole for hoist built-in fitting to carry out section of jurisdiction design field of section of jurisdiction mounting means.
Background
The shield construction method is widely applied to structures such as subway tunnels, water delivery tunnels, cable tunnels and the like.
The concrete lining segment is used as the most common supporting form, and mainly comprises two modes of relying on an embedded hoisting hole and a vacuum chuck during installation, and compared with a sucker type, the concrete lining segment is generally applied to large-size shields, and the embedded hoisting hole is more widely applied.
The segment hoisting hole embedded parts are generally divided into iron embedded parts and engineering plastic embedded parts, the engineering plastic embedded parts generally adopt single-crescent arc thread plastic grouting pipes (which also serve as hoisting holes), and the segment hoisting hole embedded parts are widely used in the shield tunnel engineering in China due to the advantage of low cost.
The main reasons for the occurrence of the falling-off accident of the embedded part of the plastic hoisting hole are as follows: the metal hoisting head is not rotated in place, is deviated when loosened or screwed, has the phenomenon of tooth sweeping of partial screw teeth, has too few reinforcing bars at the position of the segment concrete embedded part, has large operation pressure of a segment erector and the like.
The early three-head triangular thread or single-head circular arc thread product generally used can basically meet the requirements, but even the stripping phenomenon exists, the single-head circular arc thread 25t product is generally adopted.
The segment hoisting pre-buried hole has the prerequisite that the segment assembling quality is not influenced, and the segment assembling process is safe.
The tensile strength of the plastic hoisting hole embedded part product is not high, the plastic hoisting hole embedded part product cannot bear large load (such as various force combinations in the shield assembling process), and the anti-pulling capacity is mainly due to the special structure of the plastic hoisting hole embedded part product and is closely combined with concrete.
If the rigidity of the plastic hoisting hole is insufficient, the plastic hoisting hole is greatly deformed when stressed; or the outer surface of the plastic embedded part has insufficient bonding force with concrete, and the two conditions can cause the damage of the segment hoisting hole during hoisting.
Generally, a steel bar protection layer on the upstream surface is set to be 50mm, in the processes of on-site steel bar cage processing and installation, 10mm errors generally exist, and the steel bar protection layer on part of the positions can reach 50-60 mm, so that a plain concrete area is too large, a segment hoisting hole is pulled, plain concrete is broken in a pulled mode, and a broken surface does not penetrate through segment main bars and distributed steel bars.
The section of jurisdiction arrangement of reinforcement does not have unified law, and the angle that different designers considered when the arrangement of reinforcement design is different, and hole for hoist built-in fitting position reinforcing bar interval is great, and this just makes hole for hoist built-in fitting position concrete atress than other positions of section of jurisdiction poor.
Research shows that most segment concrete damage surface cones do not penetrate through the transverse and longitudinal main reinforcements, the transverse and longitudinal steel bar protective layers are large, the segment central steel bar space is large, and the concrete damage surfaces do not penetrate through the transverse and longitudinal steel bar main reinforcements.
The common model diameter of the concrete vibrating rod is 30mm and 50 mm.
Disclosure of Invention
This patent optimizes the improvement to shield structure section of jurisdiction hole for hoist built-in fitting position section of jurisdiction reinforcement, and the increase of innovation reinforcing bar net and several style of calligraphy reinforcing bars have improved the concrete around the hole for hoist built-in fitting and the atress condition of reinforcing bar, reduce the possibility that section of jurisdiction hole for hoist built-in fitting position concrete destruction takes place, improve the security.
When the reinforcing bars of the duct piece are designed, the size and the interval of the reinforcing bars are properly reduced under the condition of inconvenient reinforcing bar distribution rate, especially the surrounding positions of the embedded parts of the hoisting holes.
The improved and added reinforcing steel bars adopt III-grade phi 8 twisted steel bars.
And tie bars are arranged around the embedded parts of the hoisting holes so as to improve the distribution of tensile stress in the concrete under the assembling working condition.
The distance between the reinforcing steel bars is more than 1.5 times of the diameter of the vibrating rod.
The method comprises the steps that L-shaped vertical steel bars 1 are additionally arranged on the inner sides of outer spiral steel bars of existing hoisting hole embedded parts, the spiral steel bars and spiral steel bars 02 around the embedded hoisting hole embedded parts are fixed in a spot welding mode, 45-degree bending is conducted around the tops of the spiral steel bars, and anchoring section steel bars with the length of 100mm are reserved.
And a reinforcing mesh consisting of trapezoidal thread reinforcing steel bars is added around the embedded part of the hoisting hole, the two sides of the reinforcing steel bars are bent at an angle of 45 degrees, and anchoring section reinforcing steel bars with the length of 50mm are reserved.
Spiral reinforcing bars 0202 around the pre-buried lifting hole embedded part 01 among the section of jurisdiction, the pre-buried lifting hole embedded part around the pre-buried lifting hole, section of jurisdiction longitudinal reinforcement 03, section of jurisdiction horizontal reinforcement 04, section of jurisdiction vertical reinforcement 05 are not in this patent application scope.
Compared with the common reinforcement arrangement, the improved reinforcement arrangement increases the oblique reinforcement in the three-dimensional space in the plain concrete area formed among the transverse, longitudinal and vertical reinforcement arrangements, and reduces the tensile strain damage of the plain concrete area.
Drawings
The components are numbered as follows: segment 0: hoisting hole embedded parts 01 and spiral steel bars 02; l-shaped vertical steel bar 1: a vertical steel bar section 11, a vertical steel bar hook section 12 and an anchoring section 13; trapezoidal shape reinforcing bar 2: horizontal reinforcing steel bar section 21, horizontal reinforcing steel bar crotch section 22, anchor section 23.
Figure 1 is a longitudinal cross-sectional view of the present reinforcement improvement.
Fig. 2 is a cross-sectional view of the present reinforcement bar modification.
Fig. 3 is a bottom view of the present reinforcement improvement.
Detailed Description
This patent optimizes the improvement to the 01 position section of jurisdiction arrangement of shield segment hole for hoist built-in fitting, the increase of innovation reinforcing bar net and several font reinforcing bars, the inboard vertical reinforcing bar of spiral muscle, improved the atress condition of concrete and reinforcing bar around the hole for hoist built-in fitting 01, reduce the possibility that the 01 position concrete of section of jurisdiction hole for hoist built-in fitting destroys the emergence, improve the security.
And the size of the reinforcing steel bars at each position is determined according to the size of the pipe piece.
A duct piece with the thickness of 350mm, the width of 1200mm and the inner diameter of 5500mm is taken as an example for explanation, and the size is only demonstration and is specifically adjusted according to the size and the stress of the duct piece.
The improved and added reinforcing steel bars adopt III-grade phi 8 twisted steel bars.
And (5) respectively blanking the reinforcing steel bars at all positions.
And pre-bending the reinforcing steel bars at all positions according to the drawing styles.
The method comprises the steps that L-shaped vertical steel bars 1 are additionally arranged on the inner sides of outer spiral steel bars of existing hoisting hole embedded parts, spiral steel bars 02 and vertical steel bar sections 11 around the hoisting hole embedded parts 01 are fixed in a spot welding mode, vertical steel bar hook sections 12 with 45-degree angles are formed in the L-shaped vertical steel bars 1 around the tops of the spiral steel bars 02 around the hoisting hole embedded parts 01, and anchoring sections 13 with the length of 100mm are reserved.
A reinforcing mesh consisting of trapezoidal reinforcing steel bars 2 is additionally arranged around the hoisting hole embedded part 01, a horizontal reinforcing steel bar section 21 is 280mm long, horizontal reinforcing steel bar hook sections 22 with 45-degree angles are formed on two sides of each reinforcing steel bar, and an anchoring section 23 with the length of 50mm is reserved.
Firstly, a common steel reinforcement framework is installed and fixed, spiral steel reinforcements 02 and L-shaped vertical steel reinforcements 1 are installed, trapezoidal steel reinforcements 2 are installed, and finally, hoisting hole embedded parts 01 are installed.
This improvement structure can be applicable to the condition that uses the lifting hole to carry out the section of jurisdiction installation, and section of jurisdiction width 1200, 1500, section of jurisdiction thickness 300 supplyes 500 mm's most of sections of jurisdiction.
Compared with the common reinforcement arrangement, the improved reinforcement arrangement increases the oblique reinforcement in the three-dimensional space in the plain concrete area formed among the transverse, longitudinal and vertical reinforcement arrangements, and reduces the tensile strain damage of the plain concrete area.
Claims (5)
1. The utility model provides a shield constructs section of jurisdiction hole for hoist built-in fitting position arrangement of reinforcement and improves structure which characterized in that, section of jurisdiction hole for hoist built-in fitting position arrangement of reinforcement improves structure, includes that the reinforcing bar net that increases L type vertical reinforcement, increases trapezoidal shape's reinforcing bar around the hole for hoist built-in fitting outside the inboard of spiral muscle in existing hole for hoist built-in fitting.
2. The improved structure for the reinforcement at the embedded part position of the shield segment hoisting hole according to claim 1, characterized in that the improved and added reinforcement adopts a III-grade phi 8 twisted steel.
3. The improved structure for the position reinforcement of the shield segment hoisting hole embedded part according to claim 1, characterized in that an L-shaped vertical steel bar (1) is added at the inner side of a spiral steel bar outside the existing hoisting hole embedded part, the spiral steel bar is fixed with a spiral steel bar (02) around the embedded hoisting hole embedded part in a spot welding manner, the top of the spiral steel bar is bent by 45 degrees, and an anchoring section steel bar with the length of 100mm is reserved.
4. The improved structure for the position reinforcement of the embedded part of the shield segment hoisting hole of claim 1, wherein a reinforcement mesh consisting of trapezoidal thread reinforcements is added around the embedded part of the hoisting hole, the two sides of the reinforcements are bent at an angle of 45 degrees, and 50mm long reinforcements in the anchoring section are reserved.
5. The improved structure of the position reinforcement of the embedded part of the shield segment hoisting hole according to claim 1, characterized in that a plain concrete area formed among the transverse, longitudinal and vertical reinforcement is added with a reinforcement inclined in a three-dimensional space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922476818.1U CN211777497U (en) | 2019-12-31 | 2019-12-31 | Shield constructs section of jurisdiction hole for hoist built-in fitting position arrangement of reinforcement and improves structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922476818.1U CN211777497U (en) | 2019-12-31 | 2019-12-31 | Shield constructs section of jurisdiction hole for hoist built-in fitting position arrangement of reinforcement and improves structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211777497U true CN211777497U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922476818.1U Expired - Fee Related CN211777497U (en) | 2019-12-31 | 2019-12-31 | Shield constructs section of jurisdiction hole for hoist built-in fitting position arrangement of reinforcement and improves structure |
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| CN (1) | CN211777497U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112443337A (en) * | 2021-01-29 | 2021-03-05 | 湖南大学 | Ultra-high performance concrete-common concrete shield tunnel segment and construction method thereof |
-
2019
- 2019-12-31 CN CN201922476818.1U patent/CN211777497U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112443337A (en) * | 2021-01-29 | 2021-03-05 | 湖南大学 | Ultra-high performance concrete-common concrete shield tunnel segment and construction method thereof |
| CN112443337B (en) * | 2021-01-29 | 2021-08-31 | 湖南大学 | Ultra-high performance concrete-common concrete shield tunnel segment and construction method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201027 |
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| CF01 | Termination of patent right due to non-payment of annual fee |