CN206146313U - Reduce and surpass cloth pore structure of owing to dig - Google Patents
Reduce and surpass cloth pore structure of owing to dig Download PDFInfo
- Publication number
- CN206146313U CN206146313U CN201621128926.XU CN201621128926U CN206146313U CN 206146313 U CN206146313 U CN 206146313U CN 201621128926 U CN201621128926 U CN 201621128926U CN 206146313 U CN206146313 U CN 206146313U
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- Prior art keywords
- holes
- pore structure
- dense
- spaced
- spacer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The utility model relates to a reduce and surpass cloth pore structure of owing to dig, it arranges intensive hole (1) and spaced -apart ports (2) to include on edge excavation round profile (3), spaced -apart ports (2) are located between two intensive hole (1), the degree of depth of intensive hole (1) is greater than spaced -apart ports (2), intensive hole (1) and spaced -apart ports (2) parallel arrangement are on excavation wheel profile (3). The utility model discloses simple structure, convenient operation effectively solves the method construction china super -league matches of subway tunnel mine and owes the problem of digging.
Description
Technical field
This utility model belongs to Tunnel Engineering field, reduces in being related to a kind of shallow buried covered excavation urban subway tunnel blast working
The cloth pore structure of out break.
Background technology
In urban subway tunnel blast working, primary requirement is that outline excavation shaping is regular, and scar is smooth, strict to control
Out break.Tunnel Overbreak ＆ Underbreak has a strong impact on construction period, increases construction cost.Conventional processing means are using photoface exploision skill
Art.Smooth Surface Blasting Technology measure required using low blasting speed, low-density, the small diameter medicine roll of low power, and periphery hole accomplish while
Detonation.In practice of construction, especially shallow buried covered excavation urban subway tunnel receives surrounding constructure influence, and vibration velocity control is strict,
It is difficult to accomplish periphery hole while detonation.The method difficulty of construction is big, deficiency in economic performance.Therefore, need badly a kind of more economical effective
Reduction out break cloth pore structure.
The content of the invention
The purpose of this utility model is had high demands for existing smooth Surface Blasting Technology measure, and operating difficultiess enter to periphery hole
Row optimization, proposes a kind of rational arrangement bores structure, to solve the problems, such as shallow buried covered excavation urban subway tunnel blast working out break.
The purpose of this utility model can be realized by following technical proposal：
A kind of cloth pore structure for reducing out break, arranges dense holes and spacer holes including along excavation contour line；Interval hole position
Between two dense holes；The depth of dense holes is more than spacer holes；Dense holes are arranged in parallel on excavation contour line with spacer holes.
Described intensive pitch of holes is controlled in 200 ~ 300mm.
Described dense holes are 3 ~ 5 ° with the outer limb of spacer holes.
Described spacer holes severity control is the 1/3 ~ 1/2 of intensive hole depth.
This utility model does not need strict requirements in smooth Surface Blasting Technology measure, easy to operate, and effective control is super
Owe to dig.
Description of the drawings
Fig. 1 is cloth hole structural representation of the present utility model；
Fig. 2 is this utility model A-A section partial schematic diagrams；
In figure, 1, dense holes；2nd, spacer holes；3rd, excavation contour line.
It is clear to represent, facilitate engineering staff to understand that dense holes are represented with macropore in Fig. 1, and spacer holes are represented with aperture, it is real
In the construction of border, both apertures are the same.
Specific embodiment
To make those skilled in the art more be apparent from the utility model, below in conjunction with accompanying drawing and it is embodied as
Example, elaborates.
In the present embodiment, a kind of cloth pore structure for reducing out break includes arranging dense holes 1 and spacer holes along excavation contour line
2；Spacer holes 2 are located between two dense holes 1；The depth of dense holes 1 is more than spacer holes 2；Dense holes 1 and 2 parallel cloth of spacer holes
Put on excavation contour line 3.
Described 1 spacing of dense holes is 300mm；Described dense holes 1 are 3 ° with 2 outer limb of spacer holes；Between described
Every 2 severity control of hole the 1/2 of 1 depth of dense holes.
Certain subway tunnel section is constructed using benching tunnelling method, top bar 1.5 meters of daily footage of design, borehole diameter 42mm, auxiliary
Eye borehole depth 1.7m, spacing 600mm.Periphery hole presses 300mm spacing arrangement dense holes 1, between arranging between each two dense holes 1
Every hole 2.1 depth 1.7m of dense holes, 2 depth 0.85m of spacer holes.Snubber single hole powder charge 0.45kg, reliever single hole powder charge
0.3kg, 1 single hole powder charge 0.3kg of dense holes, 2 single hole powder charge 0.15kg of spacer holes.
After the completion of powder charge, detonated using non-electrical millisecond extension mode, wherein dense holes 1 are prolonged using millisecond altogether with spacer holes 2
15,16,17 sections of phase series Jian Ge not be detonated.Demolition effect is good, profiled outline shaping rule, substantially without out break problem.
Claims (4)
1. it is a kind of reduce out break cloth pore structure, it is characterised in that include along excavation contour line（3）Upper arrangement dense holes（1）
With spacer holes（2）；Spacer holes（2）Positioned at two dense holes（1）It is middle；Dense holes（1）Depth be more than spacer holes（2）；It is intensive
Hole（1）With spacer holes（2）It is arranged in parallel in excavation contour line（3）On.
2. it is according to claim 1 it is a kind of reduce out break cloth pore structure, it is characterised in that described dense holes（1）
Spacing is controlled in 200 ~ 300mm.
3. it is according to claim 1 it is a kind of reduce out break cloth pore structure, it is characterised in that described dense holes（1）
With spacer holes（2）Outer limb is 3 ~ 5 °.
4. it is according to claim 1 it is a kind of reduce out break cloth pore structure, it is characterised in that described spacer holes（2）
Severity control is in dense holes（1）The 1/3 ~ 1/2 of depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621128926.XU CN206146313U (en) | 2016-10-18 | 2016-10-18 | Reduce and surpass cloth pore structure of owing to dig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621128926.XU CN206146313U (en) | 2016-10-18 | 2016-10-18 | Reduce and surpass cloth pore structure of owing to dig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206146313U true CN206146313U (en) | 2017-05-03 |
Family
ID=58621293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621128926.XU Expired - Fee Related CN206146313U (en) | 2016-10-18 | 2016-10-18 | Reduce and surpass cloth pore structure of owing to dig |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206146313U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504872A (en) * | 2017-09-13 | 2017-12-22 | 大连理工大学 | It is a kind of to prevent tunnel arch foot to owe the blasting method dug |
-
2016
- 2016-10-18 CN CN201621128926.XU patent/CN206146313U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504872A (en) * | 2017-09-13 | 2017-12-22 | 大连理工大学 | It is a kind of to prevent tunnel arch foot to owe the blasting method dug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170503 Termination date: 20171018 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |