CN204267065U - A kind of soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure - Google Patents
A kind of soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure Download PDFInfo
- Publication number
- CN204267065U CN204267065U CN201420674924.5U CN201420674924U CN204267065U CN 204267065 U CN204267065 U CN 204267065U CN 201420674924 U CN201420674924 U CN 201420674924U CN 204267065 U CN204267065 U CN 204267065U
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- Prior art keywords
- anchor
- anchor cable
- base plate
- soft
- large diameter
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Abstract
The utility model discloses a kind of soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure, this structure is positioned in the boring of soft-rock tunnel base plate, described structure is a special anchor Cable Structure of being entangled by large diameter anchor by plastic bushing, this structural entity is cylindric, by plastic bushing through large diameter anchor, sleeve pipe is stretched out at large diameter anchor two ends, stretches out sleeve pipe two ends and all adopts Ma Lisan tube sealing, but tube sealing length is different.This major diameter casing anchor Cable Structure is arranged in roadway floor boring, sealing of hole after high-pressure slip-casting, under can solving deep-well highland pressure, rich water soft-rock tunnel base plate condition, traditional anchor cable full length fastening formula anchor note method cannot realize the problem of the long-acting high pre-stress of anchor cable, ensures that roadway floor is complete and stable.
Description
Technical field
The utility model relates to a kind of soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure, for the base plate supporting under highland, deep pressure, rich water soft-rock tunnel base plate condition and reinforcing.
Background technology
Along with coal mining depth increases year by year, when under deep " five high two disturbances " mining environment, tunnel is long, Rheological Problems is more aobvious outstanding.Particularly under current support idea environment of " emphasizing that side topmast in tunnel is protected and ignored base plate supporting completely simply ", add the rich water of most roadway floor country rock serious, roadway floor often becomes distortion region the most violent, planted agent destroys floor strata structure repeatedly, easily cause two to help interior squeezing simultaneously, affect whole tunnel side topmast protecting system to stablize, aggravation deformation of the surrounding rock in tunnel destroys further.When noseplate Treatment process mainly comprises base plate anchor note technology, arch technology of the anti-end, grouting reinforcement technique, anchor pole (rope) support technology etc., and some support technical tie-up supporting, and base plate anchor note technology is most widely used, Be very effective.But the anchor cable in traditional base plate anchor note technology usually cannot realize end anchorage and adopt full length fastening formula anchor to note while high-pressure slip-casting, and anchor cable diameter is less, cannot realize the long-acting high pre-stress of baseboard anchor cable.
Summary of the invention
Technical problem: the purpose of this utility model is the deficiency overcome in prior art, a kind of soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure is provided, for realizing baseboard anchor cable under the condition of end anchorage, higher pretightning force can be applied, thus realize the long-acting high pre-stress of baseboard anchor cable, improve stress state and the mechanical property of roadway floor country rock, improve the self-bearing capacity of roadway floor rock.
Technical scheme: this structure is placed in roadway floor boring, it is characterized in that: described structure is the special anchor Cable Structure that large diameter anchor entangles by a plastic bushing, this structural entity is cylindric, by large diameter anchor through plastic bushing, sleeve pipe is stretched out at large diameter anchor two ends, stretch out after sleeve pipe two ends cotton yarn is wound around and all adopt Ma Lisan tube sealing, but tube sealing length is different;
The external diameter of plastic bushing described in the utility model is 40 ~ 42mm, and internal diameter is 34 ~ 36 mm, and length is 3 ~ 4m;
The diameter of large diameter anchor described in the utility model is 28 ~ 32mm, and length is 6 ~ 10m, and wherein the length of sleeve pipe is stretched out in one end is 200 ~ 300mm, and the length that the other end stretches out sleeve pipe is 3 ~ 6m;
Cotton yarn described in the utility model is wound around the length 15 ~ 20mm of large diameter anchor, and thickness is 2 ~ 8mm;
One end that the tube sealing of Ma Lisan described in the utility model length is long is 400 ~ 500mm; Short one end is 100 ~ 200mm, and the freedom length realizing large diameter anchor height pretension is 2.5 ~ 3.5m.
Beneficial effect:
(1) provide highland, a kind of deep pressure, rich water roadway floor condition goes to the bottom distension improvement large diameter anchor structure, this large diameter anchor structure is used to carry out end distension improvement, major diameter such as Φ 29 large diameter anchor Fracture Force reaches 942KN, considerably beyond the Fracture Force 440KN of common Φ 22 large diameter anchor, while realizing high pretension, ensure the anchored force that large diameter anchor is higher;
(2) can ensure after one end tube sealing that Ma Lisan tube sealing is longer that slurries can not enter in sleeve pipe when adopting deep hole grouting pipe to carry out deep high-pressure slip-casting, thus realize having in sleeve pipe the anchor cable of certain length not bond by deep hole grouting slurries and become free segment; In longer scope, there is high prestressing force by anchor cable can be realized after jacket exterior high-pressure slip-casting, rock in roadway floor certain limit is converted into from biaxial stress state, low confined pressure triaxial stress state the triaxial stress state had compared with high confining pressure, greatly improves floor rocks opposing because of the ability of deformation failure by horizontal pressure force and dynamic pressure affect;
(3), after one end tube sealing that Ma Lisan tube sealing is shorter, prevent from being subject to the impact of water or weathering in free section of anchor cable and corroding, thus weaken anchor cable performance.
Accompanying drawing explanation
Fig. 1 is major diameter casing anchor Cable Structure elevation in the utility model;
Fig. 2 is
-
sectional drawing;
In figure: 1-large diameter anchor; 2-plastic bushing; 3-Ma Lisan; 4-large diameter anchor free segment; 5-cotton yarn.
Detailed description of the invention
In the present embodiment, a kind of soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure is carried out as follows:
a.choose plastic bushing, large diameter anchor, two parts, the cotton yarn of long 200mm, Ma Lisan mixed liquor;
b.the position that marker sleeve is installed and cotton is wound around on large diameter anchor, then cotton is wrapped in large diameter anchor marked locations, the external diameter after winding is slightly less than casing inner diameter;
c.to the anchor cable threading of cotton yarn be twined to mark position, now cotton yarn is tamping sleeve pipe just, sleeve pipe is divided into three parts: sleeve pipe long end, short end and free segment (in the free segment that cotton yarn can prevent Ma Lisan from entering in the middle of sleeve pipe, namely controlling the length of Ma Lisan in sleeve pipe two ends);
d.sleeve pipe anchor cable short end is vertically placed downwards, then Ma Lisan mixed liquor is poured in the gap between the sleeve pipe of sealing of hole long end and anchor cable, till Ma Lisan mixed liquor is excessive, leave standstill a period of time; After long end Ma Lisan consolidation, anchor cable reversion is vertically placed, by same method Sealed casing pipe short end, after whole consolidation, then complete the making of major diameter casing anchor Cable Structure;
The further scheme of the present embodiment is, this structure is placed in roadway floor boring, comprises sleeve pipe 2 and metal large diameter anchor 1 that outside is made of plastics.Structural outer is plastic bushing 2, external diameter
rbe 40 ~ 42mm, internal diameter
rbe 34 ~ 36mm, long
l 2 be 3 ~ 4m; In sleeve pipe 2, large diameter anchor 1 diameter is 28 ~ 32mm, length
lbe 6 ~ 10m, wherein the length of sleeve pipe 2 is stretched out in one end
l 1 be 300 ~ 400mm, the other end stretches out the length of sleeve pipe 2
l 3 be 3 ~ 6m; Cotton yarn 5 is wound around the length of large diameter anchor 1
pbe 15 ~ 20mm, thickness
qbe 2 ~ 8mm; Ma Lisan 3 tube sealing comparatively long end tube sealing length
mbe 400 ~ 500mm, comparatively short end tube sealing length
nbe 100 ~ 200mm, realize the freedom length of large diameter anchor height pretension
l 4 be 2.5 ~ 3.5m.
Claims (5)
1. a soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure, this structure is placed in roadway floor boring, it is characterized in that: described structure is a special anchor Cable Structure of being entangled by large diameter anchor (1) by plastic bushing (2), this structural entity is cylindric, by plastic bushing (2) through large diameter anchor (1), sleeve pipe is stretched out at large diameter anchor (1) two ends, stretch out after sleeve pipe two ends cotton yarn (5) are wound around and all adopt Ma Lisan (3) tube sealing, but tube sealing length is different.
2. soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure according to claim 1, is characterized in that: described plastic bushing external diameter (
r) be 40 ~ 42mm, internal diameter (
r) be 34 ~ 36 mm, long (
l 2 ) be 3 ~ 4m.
3. soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure according to claim 1, is characterized in that: described large diameter anchor (1) external diameter is 28 ~ 32mm, length (
l) be 6 ~ 10m, wherein one end stretch out sleeve pipe (2) length (
l 1 ) be 300 ~ 400mm, the other end stretch out sleeve pipe (2) length (
l 3 ) be 3 ~ 6m.
4. soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure according to claim 1, is characterized in that: described cotton yarn (5) winding large diameter anchor length (
p) be 15 ~ 20mm, thickness (
q) be 2 ~ 8 mm.
5. soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure according to claim 1, is characterized in that: described large diameter anchor stretch out cover pipe range one end Ma Lisan (3) tube sealing length (
m) be 400 ~ 500mm, short one end Ma Lisan (3) tube sealing length (
n) be 100 ~ 200mm, realize large diameter anchor height pretension freedom length (
l 4 ) be 2.5 ~ 3.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420674924.5U CN204267065U (en) | 2014-11-13 | 2014-11-13 | A kind of soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420674924.5U CN204267065U (en) | 2014-11-13 | 2014-11-13 | A kind of soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204267065U true CN204267065U (en) | 2015-04-15 |
Family
ID=52801937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420674924.5U Expired - Fee Related CN204267065U (en) | 2014-11-13 | 2014-11-13 | A kind of soft-rock tunnel base plate height pretension major diameter casing anchor Cable Structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN204267065U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107849918A (en) * | 2015-07-23 | 2018-03-27 | 贝卡尔特公司 | Hawser bolt |
-
2014
- 2014-11-13 CN CN201420674924.5U patent/CN204267065U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107849918A (en) * | 2015-07-23 | 2018-03-27 | 贝卡尔特公司 | Hawser bolt |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150415 Termination date: 20151113 |
|
| EXPY | Termination of patent right or utility model |