CN206513372U - A kind of drilling and blasting method point pilot drive structure - Google Patents
A kind of drilling and blasting method point pilot drive structure Download PDFInfo
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- CN206513372U CN206513372U CN201720148116.9U CN201720148116U CN206513372U CN 206513372 U CN206513372 U CN 206513372U CN 201720148116 U CN201720148116 U CN 201720148116U CN 206513372 U CN206513372 U CN 206513372U
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- drilling
- median septum
- drive structure
- blasting method
- country rock
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Abstract
The utility model is related to a kind of drilling and blasting method point pilot drive structure, including tunnel cross-section, country rock, which is excavated, in tunnel cross-section side forms leading pilot tunnel, supporting construction and median septum are provided with the leading pilot tunnel, the bottom of the supporting construction and median septum is fixed on the country rock that bottom is not excavated by some lock foot anchoring stocks, space is left between the country rock of the median septum and tunnel cross-section opposite side, the width in the space is 30~50cm；The median septum is provided with baffle plate towards the one side in space.The explosion of row pilot tunnel and can lift a rate of advance for the damage of median septum after the utility model is substantially reduced.
Description
Technical field
The utility model is related to constructing tunnel field, and in particular to a kind of drilling and blasting method point pilot drive structure.
Background technology
Pilot tunnel method, is a kind of common method when drilling and blasting method excavates large cross-section tunnel, and a part for first excavated section, which is used as, to be led
Hole, then gradually expand the whole section of tunnel excavation.This is larger in tunnel section, due to geological conditions or execution conditions, is adopted
When being had any problem with full face tunneling, a kind of construction method based on middle-size and small-size machinery.
Traditional pilot tunnel method is in operation, and median septum is close on the country rock not excavated, can thus there is following ask
Topic：Afterwards during the explosion of row pilot tunnel, the median septum as temporary support can be caused damage, influence operation security, in addition in every
Wall will also result in certain influence to the excavation of rear row pilot tunnel, reduce a rate of advance.
The U of Publication No. CN 205778879 Chinese utility model patent, discloses a kind of Super-large-section tunnel drilling and blasting method
Original position enlarging constructing structure, discloses in mid-board in the specification of this application and does not excavate between country rock, leave certain interval,
And filled with cystosepiment, the impact damage caused close to country rock explosion to interim mid-board can be prevented.But the structure is not
The a rate of advance of row pilot tunnel after being lifted.
Utility model content
The utility model purpose is：In order to solve the problem of prior art in above-mentioned background technology is present, there is provided one
The explosion of row pilot tunnel and can lift point pilot drive structure of a rate of advance for the damage of median septum after kind substantially reducing.
The utility model solves the technical scheme that its technical problem used：
A kind of drilling and blasting method point pilot drive structure, including tunnel cross-section, excavate country rock in tunnel cross-section side and are formed in advance
Supporting construction and median septum are provided with pilot tunnel, the leading pilot tunnel, the bottom of the supporting construction and median septum passes through some locks
Pin anchor pole is fixed on the country rock that bottom is not excavated, and space is left between the country rock of the median septum and tunnel cross-section opposite side,
The width in the space is 30 ~ 50cm；The median septum is provided with baffle plate towards the one side in space.
Preferably, in addition to ruggedized construction, country rock surface of the ruggedized construction in space.
In any of the above-described scheme preferably, the ruggedized construction is gunite concrete.
In any of the above-described scheme preferably, the width in the space is preferably 50cm.
In any of the above-described scheme preferably, the supporting construction includes steel arch beam and gunite concrete.
In any of the above-described scheme preferably, the median septum is stalk formula median septum.
In any of the above-described scheme preferably, the median septum, which includes erecting, sets steelframe and gunite concrete.
In any of the above-described scheme preferably, the thickness of the baffle plate is 10 ~ 20mm.
In any of the above-described scheme preferably, the Weir Plate Thickness is 15mm.
In any of the above-described scheme preferably, the baffle plate is steel plate/composite wood boards.
According to drilling and blasting method of the present utility model point pilot drive structure, median septum does not excavate country rock with tunnel cross-section opposite side
Between, space is left, and baffle plate is provided with towards the one side in space in median septum, when rear row pilot tunnel explosion, baffle plate can be big
Big scattered explosion reduces damage of the explosion for median septum for the impulsive force of median septum, meanwhile, because the presence in space, drop
Low influence of the median septum for rear row pilot drive, lifts a rate of advance；In addition, relative to conventional method, the utility model
Structure than the free face of many places one（The face of country rock i.e. in space）, after being conducive to during the explosion of row pilot tunnel blasthole laying, subtract
Small explosive consumption, reduces cost.
Moreover, baffle plate can also play a part of external mold in median septum gunite concrete, it is to avoid waste concrete.Enter
And, when country rock is poor, the ruggedized construction formed using gunite concrete can prevent caving in for space inside country rock, prevent peace
The generation of full accident.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is the structural representation of the preferred embodiment according to drilling and blasting method of the present utility model point pilot drive structure.
Embodiment
The utility model is described in further detail presently in connection with accompanying drawing.These accompanying drawings are simplified schematic diagram,
Only illustrate basic structure of the present utility model in a schematic way, therefore it only shows the composition relevant with the utility model.
As shown in figure 1, a kind of drilling and blasting method point pilot drive structure, including tunnel cross-section, excavate and enclose in tunnel cross-section side
Rock 1, which is formed, is provided with supporting construction 3 and median septum 4, the supporting construction 3 and median septum 4 in leading pilot tunnel 2, the leading pilot tunnel 2
Bottom be fixed on by some lock foot anchoring stocks 7 on the country rock 1 not excavated bottom, the median septum 4 and tunnel cross-section opposite side
Country rock 1 between leave space 5, the width in the space 5 is 30 ~ 50cm；The median septum 4 is provided with towards the one side in space 5
Baffle plate 6.
It is used as further preferred scheme：Also include ruggedized construction 8, country rock 1 of the ruggedized construction 8 in space 5
Surface.
It is used as further preferred scheme：The ruggedized construction 8 is gunite concrete.
It is used as further preferred scheme：The width in the space 5 is preferably 50cm.
It is used as further preferred scheme：The supporting construction 3 includes steel arch beam and gunite concrete.
It is used as further preferred scheme：The median septum 4 is stalk formula median septum.
It is used as further preferred scheme：The median septum 4, which includes erecting, sets steelframe and gunite concrete.
It is used as further preferred scheme：The thickness of the baffle plate 6 is 10 ~ 20mm.
It is used as further preferred scheme：The thickness of baffle plate 6 is 15mm.
It is used as further preferred scheme：The baffle plate 6 is steel plate/composite wood boards.
Embodiment one：
The method that pilot drive is carried out using an embodiment of the present utility model, is comprised the following steps：
（1）, be chosen to be on the country rock 1 of tunnel cross-section, the country rock on the right side of Blasting Excavation forms leading pilot tunnel 2, leading
Steel arch-shelf and gunite concrete formation supporting construction 3 are set up in pilot tunnel 2, its bottom lock foot anchoring stock 7 is fixed on bottom and do not excavated
Country rock 1 on.
（2）Steelframe is set up in the place for the country rock 50cm not excavated apart from left side, and is set in steelframe towards the one side in space 5
There are the thick steel sheet baffles 6 of 10mm.
（3）Sprayed on toward steelframe gunite concrete formation median septum 4, now baffle plate 6 plays a part of external mold, it is to avoid mixed
The waste of soil is coagulated, the bottom of median septum 4 is fixed on the country rock 1 not excavated bottom by lock foot anchoring stock 7.Median septum 4 uses stalk
Formula, is different from traditional bent wall, to lift its longitudinal load-bearing ability.
（4）The surface gunite concrete formation ruggedized construction 8 of country rock 1 in toward space 5, this step for country rock it is poor when add
Gu country rock, prevents wall damage from triggering security incident, when country rock is preferable, it is convenient to omit the step.
（5）Row pilot tunnel after Blasting Excavation is carried out to left side country rock, the noncontact impact that explosion is produced is by the scattered of baffle plate
The impact to median septum 4 is greatly reduced afterwards, it is therefore prevented that explosion for median septum 4 damage, meanwhile, compared to traditional excavation side
Method, structure of the present utility model has more a free face than it（The scope of freedom）, i.e., country rock 1 be located at space 5 in that face, because
This, the arrangement scope of blasthole is wider freer, can also reduce the usage amount of explosive, cost-effective.Meanwhile, because space 5 is deposited
Median septum 4 has little to no effect for the excavation of rear row pilot tunnel, can lift the speed of excavation.
Embodiment two,
The method that pilot drive is carried out using another embodiment of the present utility model, is comprised the following steps：
（1）, be chosen to be on the country rock 1 of tunnel cross-section, the country rock on the right side of Blasting Excavation forms leading pilot tunnel 2, leading
Steel arch-shelf and gunite concrete formation supporting construction 3 are set up in pilot tunnel 2, its bottom lock foot anchoring stock 7 is fixed on bottom and do not excavated
Country rock 1 on.
（2）Steelframe is set up in the place for the country rock 30cm not excavated apart from left side, and is set in steelframe towards the one side in space 5
There are the thick wood materials baffle plates 6 of 15mm.The baffle plate of wood materials, compared to the baffle plate of metal material, ensure that sufficient intensity
On the premise of, quality is lighter, installs, removes convenient transportation, cost is lower.
（3）Sprayed on toward steelframe gunite concrete formation median septum 4, now baffle plate 6 plays a part of external mold, it is to avoid mixed
The waste of soil is coagulated, the bottom of median septum 4 is fixed on the country rock 1 not excavated bottom by lock foot anchoring stock 7.Median septum 4 uses stalk
Formula, is different from traditional bent wall, to lift its longitudinal load-bearing ability.
（4）The surface gunite concrete formation ruggedized construction 8 of country rock 1 in toward space 5, this step for country rock it is poor when add
Gu country rock, prevents wall damage from triggering security incident, when country rock is preferable, it is convenient to omit the step.
（5）When carrying out row pilot tunnel after Blasting Excavation to left side country rock, point of baffle plate is passed through in the noncontact impact that explosion is produced
The impact of median septum 4 is greatly reduced after dissipating, it is therefore prevented that explosion for median septum 4 damage, meanwhile, compared to traditional excavation
Method, structure of the present utility model has more a free face than it（The scope of freedom）, i.e., country rock 1 be located at space 5 in that face,
Therefore, the arrangement scope of blasthole is wider freer, can also reduce the usage amount of explosive, cost-effective.Meanwhile, because space 5
In the presence of median septum 4 has little to no effect for the excavation of rear row pilot tunnel, can lift the speed of excavation.
Embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, it is every
The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in
Other related technical fields, are similarly included in scope of patent protection of the present utility model.
Claims (10)
1. a kind of drilling and blasting method point pilot drive structure, including tunnel cross-section, country rock is excavated in tunnel cross-section side（1）Form leading
Pilot tunnel（2）, the leading pilot tunnel（2）It is interior to be provided with supporting construction（3）And median septum（4）, the supporting construction（3）And median septum
（4）Bottom pass through some lock foot anchoring stocks（7）It is fixed on the country rock that bottom is not excavated（1）On, it is characterised in that：The median septum
（4）With the country rock of tunnel cross-section opposite side（1）Between leave space（5）, the space（5）Width be 30 ~ 50cm；In described
Next door（4）Towards space（5）One side be provided with baffle plate（6）.
2. a kind of drilling and blasting method point pilot drive structure as claimed in claim 1, it is characterised in that：Also include ruggedized construction（8）,
The ruggedized construction（8）Located at space（5）Interior country rock（1）Surface.
3. a kind of drilling and blasting method point pilot drive structure as claimed in claim 2, it is characterised in that：The ruggedized construction（8）For
Gunite concrete.
4. a kind of drilling and blasting method point pilot drive structure as claimed in claim 1, it is characterised in that：The space（5）Width
For 50cm.
5. a kind of drilling and blasting method point pilot drive structure as claimed in claim 1, it is characterised in that：The supporting construction（3）Bag
Include steel arch beam and gunite concrete.
6. a kind of drilling and blasting method point pilot drive structure as claimed in claim 1, it is characterised in that：The median septum（4）To be straight
Wall median septum.
7. a kind of drilling and blasting method point pilot drive structure as described in claim 1 or 6, it is characterised in that：The median septum（4）Bag
Include to erect and set steelframe and gunite concrete.
8. a kind of drilling and blasting method point pilot drive structure as claimed in claim 1, it is characterised in that：The baffle plate（6）Thickness
For 10 ~ 20mm.
9. a kind of drilling and blasting method point pilot drive structure as claimed in claim 8, it is characterised in that：The baffle plate（6）Thickness is
15mm。
10. a kind of drilling and blasting method point pilot drive structure as claimed in claim 1, it is characterised in that：The baffle plate（6）For steel
Plate/composite wood boards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720148116.9U CN206513372U (en) | 2017-02-18 | 2017-02-18 | A kind of drilling and blasting method point pilot drive structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720148116.9U CN206513372U (en) | 2017-02-18 | 2017-02-18 | A kind of drilling and blasting method point pilot drive structure |
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| Publication Number | Publication Date |
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| CN206513372U true CN206513372U (en) | 2017-09-22 |
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| CN201720148116.9U Active CN206513372U (en) | 2017-02-18 | 2017-02-18 | A kind of drilling and blasting method point pilot drive structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541711A (en) * | 2019-09-03 | 2019-12-06 | 山东唐口煤业有限公司 | method for strengthening underground chamber brush |
| CN111379576A (en) * | 2020-01-08 | 2020-07-07 | 中铁隧道局集团有限公司 | Method for connecting primary support and large-diameter pipe shed in shed cover construction |
| CN114198120A (en) * | 2021-12-14 | 2022-03-18 | 中铁华铁工程设计集团有限公司 | Construction method for treating fault broken zone of shield segment of submarine tunnel |
-
2017
- 2017-02-18 CN CN201720148116.9U patent/CN206513372U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110541711A (en) * | 2019-09-03 | 2019-12-06 | 山东唐口煤业有限公司 | method for strengthening underground chamber brush |
| CN111379576A (en) * | 2020-01-08 | 2020-07-07 | 中铁隧道局集团有限公司 | Method for connecting primary support and large-diameter pipe shed in shed cover construction |
| CN111379576B (en) * | 2020-01-08 | 2022-05-03 | 中铁隧道局集团有限公司 | Method for connecting primary support and large-diameter pipe shed in shed cover construction |
| CN114198120A (en) * | 2021-12-14 | 2022-03-18 | 中铁华铁工程设计集团有限公司 | Construction method for treating fault broken zone of shield segment of submarine tunnel |
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