CN207715161U - A kind of advanced short tube canopy stiffening device - Google Patents
A kind of advanced short tube canopy stiffening device Download PDFInfo
- Publication number
- CN207715161U CN207715161U CN201721922307.2U CN201721922307U CN207715161U CN 207715161 U CN207715161 U CN 207715161U CN 201721922307 U CN201721922307 U CN 201721922307U CN 207715161 U CN207715161 U CN 207715161U
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- China
- Prior art keywords
- steel pipe
- pipe
- short tube
- stiffening device
- flower
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Abstract
A kind of advanced short tube canopy stiffening device, is related to underground engineering construction field more particularly to Tunnel Engineering advanced stand device., using flower steel pipe, flower steel pipe front end is tapered, extravasating hole is drilled on pipe shaft, pipe shaft starches section until tail portion for it.Its key technology is put more energy into hoop in flower steel pipe tail end anchor ear, in colored steel pipe inner chamber by garter spring fixed steel bars beam, the welding protective layer holder on tendon.The utility model has an advantageous effect in that：Increase the overall stiffness of pipe canopy by the tendon of flower steel duct, avoid ductule since slip casting in this period before grout cures, since itself rigidity is small, the load for excavating release can not be carried and bent, the problem of causing face unstability that cave-in accident occurs, improve the stability of excavated surface, it is therefore prevented that the generation of cave in accident is conducive to the safe construction in tunnel.
Description
Technical field
The utility model is related to underground engineering construction field more particularly to Tunnel Engineering advanced stand devices.
Background technology
During constructing tunnel, often because the characteristic of geological formations is very unfavorable to tunnel excavation process, need
Advance support is carried out to tunnel arch before excavation construction process, and wherein relatively conventional method for protecting support is then advanced big pipe
Canopy and per-fore pouring liquid with small pipe supporting, the construction method of both advance supports are all to play reinforcement effect to ravelly ground, note
Loose, weak surrounding rock stability is enhanced after slurry, be conducive to after completing to excavate with complete the steady of country rock in the preliminary bracing time
It is fixed, it is unlikely to wall rock destabilization and destroys until caving in.
It is needed to working face according to super-front large pipe shed supporting since construction working face is narrow in tunnel trunk excavation
It being digged, more increases the disturbance to country rock in this way, security risk is larger in work progress, so, in order to subtract as far as possible
Few disturbance to country rock avoids tunnel from digging, and reduces security risk, the advanced short tube shed grouting skill constituted using advanced tubule
The construction method that art carries out tunnel support is more universal.Under the unfavorable geological conditions such as tunnel concordant bias, shallow embedding, traditional is super
In preceding short pipe roof construction, ductule since slip casting in this period before grout cures, since itself rigidity is small, nothing
Method carrying is excavated the load of release and is bent, and reduces the stabilization to excavated surface, face unstability is caused to be collapsed
The accident of collapsing happens occasionally.
Invention content
Problem to be solved in the utility model provides a kind of advanced short tube that load-bearing rigidity is big aiming above insufficient
Canopy stiffening device.Its technical solution is as follows：
A kind of advanced short tube canopy stiffening device, using flower steel pipe, flower steel pipe front end is tapered, and excessive slurry is drilled on pipe shaft
Hole, pipe shaft starch section until tail portion.Its key technology is put more energy into hoop in flower steel pipe tail end anchor ear, is consolidated by garter spring in flower steel pipe inner chamber
Determine tendon, the welding protective layer holder on tendon.
The hoop of putting more energy into is using reinforcement fabrication at annular shape.
The garter spring cuts into isometric casing using pvc pipe.
Compared with prior art, the utility model has an advantageous effect in that：
1, by hoop of putting more energy into the anchor ear of flower steel pipe tail portion, construction machinery is to ductule tail during avoiding ductule from heading into
The destruction in portion.
2, by flower steel duct tendon increase pipe canopy overall stiffness, avoid ductule since slip casting to
In this period before grout cures, since itself rigidity is small, the load for excavating release can not be carried and bent, caused
The problem of cave-in accident, occurs for face unstability.
3, strengthened short tube canopy in profile steel frame web holes by being inserted into country rock, and pipe dingle portion is welded with steelframe, shape
Overarch whole force structure, has efficiently controlled the loose of country rock and deformation, has reduced ground settlement and vault sinking, improves
The stability of excavated surface, it is therefore prevented that the generation of cave in accident is conducive to the safe construction in tunnel.
Description of the drawings
Fig. 1 is the utility model external structure schematic diagram；
Fig. 2 is tendon structural schematic diagram inside the utility model；
Fig. 3 is Fig. 1 I-I sectional views；
Fig. 4 is the utility model use state diagram.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings.
Referring to Fig. 1~Fig. 4, the utility model is used as advanced short tube canopy stiffening device, 1 front end 8 of flower steel pipe using flower steel pipe 1
~10cm is tapered, is drilled with 8~10mm of Φ extravasating holes 8 in quincunx at interval of 10~15cm on pipe shaft, pipe shaft tail portion is reserved
20~30cm does not drill as only slurry section 7.Its key technology is that anchor ear is put more energy into hoop 2 at flower 1 5~10cm of tail end of steel pipe, in flower
1 inner cavity of steel pipe is by 4 fixed steel bars beam 3 of garter spring, at interval of 40~50cm welding protective layers holder 5 on tendon 3.
The hoop 2 of putting more energy into is using Φ 5~6mm reinforcement fabrications at annular shape.
The tendon 3 is formed using three 12 screw-thread steels of Φ, and tendon 3 should be less than being equal to the flower removing tapered portion of steel pipe 1
The length divided.
The garter spring 4 cuts into the isometric casings of 5~10cm using pvc pipe.
The protective layer holder 5 is made of Φ 8mm round steel, is welded on tendon 3 after in garter spring 4, installation is complete.
After the tendon 3, garter spring 4 and protective layer holder 5 complete, colored steel pipe 1 is integrally placed at as one
Then flower steel pipe 1 is sent by the gastropore in profile steel frame 6 in drilling by inner cavity, and will flower 1 tail portion of steel pipe and profile steel frame 6
Welding.
Short tube canopy is after installation is complete, and by carrying out slip casting to flower steel pipe 1, slurries are flowed out by extravasating hole 8 to tunnel surrounding
It is reinforced.
Claims (5)
1. a kind of advanced short tube canopy stiffening device, using flower steel pipe (1), flower steel pipe (1) front end is tapered, is drilled on pipe shaft excessive
It starches hole (8), section (7) is starched until pipe shaft tail portion, it is characterized in that putting more energy into hoop (2) in flower steel pipe (1) tail end anchor ear, in colored steel pipe (1)
Inner cavity is by garter spring (4) fixed steel bars beam (3), the welding protective layer holder (5) on tendon (3).
2. advanced short tube canopy stiffening device according to claim 1, it is characterized in that hoop (2) of putting more energy into uses Φ 5~6mm reinforcing bar systems
It is made annular shape.
3. advanced short tube canopy stiffening device according to claim 1, it is characterized in that tendon (3) uses three 12 screw-thread steels of Φ
Composition.
4. advanced short tube canopy stiffening device according to claim 1, it is characterized in that garter spring (4) cut into 5 using pvc pipe~
The isometric casings of 10cm.
5. advanced short tube canopy stiffening device according to claim 1, it is characterized in that protective layer holder (5) uses Φ 8mm round steel
It is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721922307.2U CN207715161U (en) | 2017-12-29 | 2017-12-29 | A kind of advanced short tube canopy stiffening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721922307.2U CN207715161U (en) | 2017-12-29 | 2017-12-29 | A kind of advanced short tube canopy stiffening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207715161U true CN207715161U (en) | 2018-08-10 |
Family
ID=63053900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721922307.2U Active CN207715161U (en) | 2017-12-29 | 2017-12-29 | A kind of advanced short tube canopy stiffening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207715161U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664202A (en) * | 2020-12-23 | 2021-04-16 | 攀钢集团工程技术有限公司 | Reverse small shed tunneling method for shallow buried section |
-
2017
- 2017-12-29 CN CN201721922307.2U patent/CN207715161U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664202A (en) * | 2020-12-23 | 2021-04-16 | 攀钢集团工程技术有限公司 | Reverse small shed tunneling method for shallow buried section |
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