CN206942800U - The convergent lock pin stake supporting construction of one kind control Tunnel sedimentation - Google Patents
The convergent lock pin stake supporting construction of one kind control Tunnel sedimentation Download PDFInfo
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- CN206942800U CN206942800U CN201720530764.0U CN201720530764U CN206942800U CN 206942800 U CN206942800 U CN 206942800U CN 201720530764 U CN201720530764 U CN 201720530764U CN 206942800 U CN206942800 U CN 206942800U
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- lock pin
- pin stake
- convergent
- supporting construction
- reinforcing bar
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Abstract
The utility model discloses the convergent lock pin stake supporting construction of one kind control Tunnel sedimentation, including the preliminary bracing in Tunnel room, inclined lock pin stake is provided with the preliminary bracing outer wall, the lock pin stake includes churning pile body, the churning pile body is connected with L-type steel muscle core, the L-type steel muscle core other end is connected with being connected reinforcing bar, and the connection reinforcing bar is connected with the I-steel steelframe of preliminary bracing.The utility model technical matters is simple, the interference of process transformer effect less, operation facility, work efficiency is improved, and excavation of being got out of a predicament or an embarrassing situation in overcoming causes that arch springing is hanging, tunnel-side is unstable or slipped to collapse and lock the problems such as footnote starches anchoring effect difference.Realize stable face, the deformation of control cavern and sedimentation and mechanized construction.
Description
Technical field
The utility model belongs to relatively tight settlement Control, the fine sand layer of self-stable ability extreme difference, water-rich saturated ground or stream modeling
The great tunnels and underground engineering design of the special formation construction risk such as shape cohesive soil, technical field of construction, and in particular to a kind of
Control the convergent lock pin stake supporting construction of Tunnel sedimentation.
Background technology
Lock foot anchoring stock（Or lock pin anchor tube）The technology that combined bolting and shotcrete grows up is accompanied by, is the arch of supporting in the early stage
A kind of steel construction sideling set at pin.Before gunite concrete after tunnel excavation, steelframe are set up, itself and steelframe are consolidated
It is fixed, limit surrouding rock deformation together with steelframe and pneumatically placed concrete.Be generally located on more than steelframe arch springing gusset plate junction 20~
In the range of 100 cm, direction is downward 15~30 degree of oblique cutting angle, 3~4m of length, anchor pole Φ 22mm hot-rolled reinforced bars（Anchor tube Φ 42
Seamless steel pipe）.Play a part of abutment wall system anchor bolt constraint country rock and preliminary bracing steelframe in top is deformed and supported into tunnel, hold back
Steelframe processed sedimentation and clearance convergence under pressure from surrounding rock effect.Because its construction is simple is easy, economy, positive effect, efficiency height etc.
Reason has obtained extensive utilization.
Many nonstandard places in its construction be present, as slip casting is not full, first branch steelframe base foundation meet water softening,
The problems such as foundation bearing capacity is low, lock foot anchoring stock（Pipe）Effect can not embody, and result in deformation, the cracking of preliminary bracing, generally adopt
Take avoid constructing because of it for measure and not in place above mentioned problem occur.But in Extra-fine sand of self-stable ability extreme difference etc. distinguishingly
Under the conditions of matter, stratum slip casting effect is poor, plastic zone of surrounding rock is big, anchor force is weak, arch springing is hanging and side wall at country rock slip the reason such as collapse,
The lock foot anchoring stock of setting（Pipe）Stratum can not be constrained and support the load that transmits of top preliminary bracing, cause preliminary bracing sedimentation and
Deform it is excessive, to construction greatly leave hidden danger.
The content of the invention
The utility model proposes that the purpose is to provide a kind of control tunnel initial-stage to solve the problems, such as that prior art is present
The convergent lock pin stake supporting construction of supporting sedimentation.
The technical solution of the utility model is：The convergent lock pin stake supporting construction of one kind control Tunnel sedimentation,
Including the preliminary bracing in Tunnel room, inclined lock pin stake is provided with the preliminary bracing outer wall, the lock pin stake includes
Churning pile body, the churning pile body are connected with L-type steel muscle core, and the L-type steel muscle core other end is connected with being connected reinforcing bar, the company
Reinforcing bar is connect with the I-steel steelframe of preliminary bracing to be connected.
The lock pin stake is set for 30 ~ 45 degree obliquely along preliminary bracing side wall.
The churning pile body is the anchoring to be formed by rotating-spray campaign and slurries filling effect, restructuring rock mass structure
Body, rotary churning pile body is interior to form churning drilling, and the reinforcing bar core is connected in churning drilling.
The top half of the tunnel cavern is located in layer of sand, and the latter half is located in loess formation, treats every circulation top bar
After pneumatically placed concrete injection, before middle bench excavation, lock pin stake is applied at arch springing between two steel arch-shelfs of top bar.
The tunnel cavern is entirely located in layer of sand, after in every circulation, middle step pneumatically placed concrete injection after, in, leave office
Before rank is excavated, lock pin stake is applied at arch springing between upper, middle two steel arch-shelfs of step.
The top half of the tunnel cavern is located at loess, and the latter half is located in layer of sand, treats in every circulation, the spray of middle step
After concrete ejection, in, before excavation of getting out of a predicament or an embarrassing situation, lock pin stake is applied at arch springing between upper, middle two steel arch-shelfs of step.
The L-type steel muscle core its long side insertion churning drilling, its short side is with being connected reinforcing bar, I-steel steelframe is connected.
The L-type steel muscle core is with being connected reinforcing bar, the connected mode of I-steel steelframe is welding.
The connected mode of the connection reinforcing bar and I-steel steelframe is welding.
The utility model technical matters is simple, process transformer effect disturbs less, operation facility, and work efficiency is improved, gram
Excavation of being got out of a predicament or an embarrassing situation in having taken causes that arch springing is hanging, tunnel-side is unstable or slips the problems such as collapsing and lock footnote slurry anchoring effect difference.
Realize stable face, the deformation of control cavern and sedimentation and mechanized construction.
The lock pin stake major advantage wherein implemented：
1）Bearing capacity is high, settling amount is small, clearance convergence is small：Stake and stratum composite integrated, frictional resistance is big, and column rigidity
Greatly, excavation of being got out of a predicament or an embarrassing situation in contains side wall quicksand phenomenon；Steel yield strength is high simultaneously, can provide stronger support force.
2）Joint is easily handled, easy to connect, reliable：Insertion steel pipe, the welding of steel pipe one end in time is fixed after rotary churning pile applies
Steel bar, easily welded with first branch steelframe, can effectively implement stake and be combined with steelframe.
3）The long, adjustable angle of stake：Site operation adjusts that stake is long, angle according to monitoring measurement in time.
4）Construction is flexible：Work on the spot amount is reduced, eliminates the randomness of construction, it is simple to operate, it is ensured that to lock the implementation effect of pin
Fruit.
5）Lock pin stake can provide larger axle power, constrain just branch steel frame deformation, got out of a predicament or an embarrassing situation in reduction and excavate the lateral of the soil body
Deformation.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model first embodiment；
Fig. 2 is the structural representation of the utility model second embodiment；
Fig. 3 is the structural representation of the utility model 3rd embodiment；
Fig. 4 is node full-page proof schematic diagram at the utility model arch springing；
Fig. 5 is Fig. 4 top view；
Fig. 6 is Fig. 4 side view；
Wherein：
Pin stake is locked in 1 preliminary bracing 2
The lock foot anchoring stock of 3 L-type steel muscle core 4
5 I-steel steelframes 6 connect reinforcing bar
7 secondary linings.
Embodiment
Hereinafter, the utility model is described in detail with embodiment referring to the drawings：
As shown in Fig. 1 ~ 6, the convergent lock pin stake supporting construction of one kind control Tunnel sedimentation, including tunnel cavern
Interior preliminary bracing 1, inclined lock pin stake 2 being provided with the outer wall of preliminary bracing 1, the lock pin stake 2 includes churning pile body,
The churning pile body is connected with L-type steel muscle core 3, and the other end of L-type steel muscle core 3 is connected with being connected reinforcing bar 6, the connection reinforcing bar
6 are connected with the I-steel steelframe 5 of preliminary bracing 1.
The lock pin stake 2 is set for 30 ~ 45 degree obliquely along the side wall of preliminary bracing 1.
The churning pile body is the anchoring to be formed by rotating-spray campaign and slurries filling effect, restructuring rock mass structure
Body, rotary churning pile body is interior to form churning drilling, and the reinforcing bar core 3 is connected in churning drilling.
As shown in figure 1, the top half of the tunnel cavern is located in layer of sand, the latter half is located in loess formation, because of sand
Layer is unstable, and arch springing is hanging or quicksand etc. causes preliminary bracing sedimentation, deformation big, and stronger support and constraint need to be set at arch springing
Distressed structure；Therefore, after every circulation top bar pneumatically placed concrete injection, before middle bench excavation, skew back arrangement is set up at arch springing
Churning machinery, lock pin stake 2 is applied at arch springing between two steel arch-shelfs of top bar.During skew back churning operation, high pressure is sent first
Water, then send cement mortar and pressure-air, after first should reaching predetermined injection pressure, grouting amount during injection, in gradual hoisting grouting pipe.
The lap of splice that Grouting Pipe is segmented lifting cannot be less than 100mm, when reaching design stake top height or excessive slurry phenomenon occur, should stop
The only churning work of current stake, and churning pipe is extracted into simultaneously detergent line.The firm muscle core 3 of L-type is inserted before grout cures, and by steel
Muscle welds with steelframe.
As shown in Fig. 2 the tunnel cavern is entirely located in layer of sand, because layer of sand is unstable, arch springing is hanging or quicksand etc.
Cause preliminary bracing sedimentation, deformation big, stronger support and constraint distressed structure need to be set at arch springing；Therefore, treat in every circulation,
After the injection of middle step pneumatically placed concrete, in, before excavation of getting out of a predicament or an embarrassing situation, the churning machinery of skew back arrangement is set up at arch springing, at upper, middle
Lock pin stake 2 is applied between two steel arch-shelfs of rank at arch springing.During skew back churning operation, water under high pressure is sent first, then send cement mortar and height
Air is pressed, after first should reaching predetermined injection pressure, grouting amount during injection, in gradual hoisting grouting pipe.Grouting Pipe segmentation lifting
The lap of splice cannot be less than 100mm, when reaching design stake top height or excessive slurry phenomenon occur, should stop the churning work of current stake
Make, and churning pipe is extracted into simultaneously detergent line.The firm muscle core 3 of L-type is inserted before grout cures, and reinforcing bar and steelframe are welded.
As shown in figure 3, the top half of the tunnel cavern is located at loess, the latter half is located in layer of sand, because of layer of sand not
Stable, arch springing is hanging or quicksand etc. causes preliminary bracing sedimentation, deformation big, and stronger support and restrained deformation need to be set at arch springing
Structure；Therefore, after in every circulation, middle step pneumatically placed concrete injection after, in, before excavation of getting out of a predicament or an embarrassing situation, at arch springing set up skew back cloth
The churning machinery put, applies lock pin stake 2 between upper, middle two steel arch-shelfs of step at arch springing.During skew back churning operation, send first
Water under high pressure, then send cement mortar and pressure-air, after first should reaching predetermined injection pressure, grouting amount during injection, in gradual lifting note
Slurry pipe.The lap of splice that Grouting Pipe segmentation is lifted cannot be less than 100mm, and phenomenon is starched when reaching design stake top height or occurring overflowing
When, the churning work of current stake should be stopped, and churning pipe is extracted into simultaneously detergent line.The firm muscle core of L-type is inserted before grout cures
3, and reinforcing bar and steelframe are welded.
Its long side of L-type steel muscle core 3 insertion churning drilling, its short side is with being connected reinforcing bar 6, I-steel steelframe 5 is connected.
The L-type steel muscle core 3 is with being connected reinforcing bar 6, the connected mode of I-steel steelframe 5 is welding.
The connected mode of the connection reinforcing bar 6 and I-steel steelframe 5 is welding.
After preliminary bracing 1 applies, lock pin stake 2 often is applied between circulation steelframe, the reinforcing bar core of L-type is inserted before grout cures
Material 3, and reinforcing bar core 3 and I-steel steelframe 5 are welded, increase a connection steel of Φ 32 to ensure load below L-type steel muscle 3
Muscle 6, and will connection reinforcing bar 6 and L-type steel muscle core 3, the firm welding of I-steel steelframe 5.
Reinforcing bar core 3 is processed into L-type using long 4.7m hot-rolled reinforced bars of Φ 32, long side 4m after processing, short side 0.4m, with
The L-type steel rib component of 90 degree of 10cm radius bends.
The connection reinforcing bar that reinforcing bar 6 is two Pin steelframes is connected, in order to which preferably node connects, is divided into the short side of reinforcing bar core 3
Connection reinforcing bar 6 is put, and by its reinforcing bar and steelframe firm welding.
The utility model technical matters is simple, process transformer effect disturbs less, operation facility, and work efficiency is improved, gram
Excavation of being got out of a predicament or an embarrassing situation in having taken causes that arch springing is hanging, tunnel-side is unstable or slips the problems such as collapsing and lock footnote slurry anchoring effect difference.
Realize stable face, the deformation of control cavern and sedimentation and mechanized construction.
Claims (9)
1. the convergent lock pin stake supporting construction of one kind control Tunnel sedimentation, including the preliminary bracing in Tunnel room
（1）, it is characterised in that：The preliminary bracing（1）Inclined lock pin stake is provided with outer wall（2）, the lock pin stake（2）Including rotation
Spray pile body, the churning pile body and L-type steel muscle core（3）It is connected, L-type steel muscle core（3）The other end is with being connected reinforcing bar（6）Phase
Even, the connection reinforcing bar（6）With preliminary bracing（1）I-steel steelframe（5）It is connected.
2. a kind of convergent lock pin stake supporting construction of control Tunnel sedimentation according to claim 1, its feature
It is：The lock pin stake（2）Along preliminary bracing（1）Side wall is set for 30 ~ 45 degree obliquely.
3. a kind of convergent lock pin stake supporting construction of control Tunnel sedimentation according to claim 1, its feature
It is：The churning pile body is the anchoring body to be formed by rotating-spray campaign and slurries filling effect, restructuring rock mass structure,
Churning drilling, the reinforcing bar core are formed in rotary churning pile body（3）It is connected in churning drilling.
4. a kind of convergent lock pin stake supporting construction of control Tunnel sedimentation according to claim 1, its feature
It is：The top half of the tunnel cavern is located in layer of sand, and the latter half is located in loess formation, treats that every circulation top bar spray is mixed
After solidifying soil injection, before middle bench excavation, lock pin stake is applied at arch springing between two steel arch-shelfs of top bar（2）.
5. a kind of convergent lock pin stake supporting construction of control Tunnel sedimentation according to claim 1, its feature
It is：The tunnel cavern is entirely located in layer of sand, after in every circulation, middle step pneumatically placed concrete injection after, in, get out of a predicament or an embarrassing situation out
Before digging, lock pin stake is applied at arch springing between upper, middle two steel arch-shelfs of step（2）.
6. a kind of convergent lock pin stake supporting construction of control Tunnel sedimentation according to claim 1, its feature
It is：The top half of the tunnel cavern is located at loess, and the latter half is located in layer of sand, treats in every circulation, the spray of middle step mixes
After solidifying soil injection, in, before excavation of getting out of a predicament or an embarrassing situation, lock pin stake is applied at arch springing between upper, middle two steel arch-shelfs of step（2）.
7. a kind of convergent lock pin stake supporting construction of control Tunnel sedimentation according to claim 3, its feature
It is：The L-type steel muscle core（3）The insertion churning drilling of its long side, its short side is with being connected reinforcing bar（6）, I-steel steelframe（5）Phase
Even.
8. a kind of convergent lock pin stake supporting construction of control Tunnel sedimentation according to claim 7, its feature
It is：The L-type steel muscle core（3）With being connected reinforcing bar（6）, I-steel steelframe（5）Connected mode for welding.
9. a kind of convergent lock pin stake supporting construction of control Tunnel sedimentation according to claim 1, its feature
It is：The connection reinforcing bar（6）With I-steel steelframe（5）Connected mode for welding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720530764.0U CN206942800U (en) | 2017-05-15 | 2017-05-15 | The convergent lock pin stake supporting construction of one kind control Tunnel sedimentation |
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| CN201720530764.0U CN206942800U (en) | 2017-05-15 | 2017-05-15 | The convergent lock pin stake supporting construction of one kind control Tunnel sedimentation |
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| CN206942800U true CN206942800U (en) | 2018-01-30 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979027A (en) * | 2017-05-15 | 2017-07-25 | 中国铁路设计集团有限公司 | Control the convergent lock pin stake supporting construction of Tunnel sedimentation |
| CN109578035A (en) * | 2018-11-06 | 2019-04-05 | 四川路航建设工程有限责任公司 | Steel pipe draining lock foot stake and construction method |
-
2017
- 2017-05-15 CN CN201720530764.0U patent/CN206942800U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979027A (en) * | 2017-05-15 | 2017-07-25 | 中国铁路设计集团有限公司 | Control the convergent lock pin stake supporting construction of Tunnel sedimentation |
| CN109578035A (en) * | 2018-11-06 | 2019-04-05 | 四川路航建设工程有限责任公司 | Steel pipe draining lock foot stake and construction method |
| CN109578035B (en) * | 2018-11-06 | 2024-04-30 | 四川路航建设工程有限责任公司 | Steel pipe drainage lock foot pile and construction method |
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