CN108952784A - High cohesive strength anchor cable structure, tunnel surrounding anchor structure and its construction method - Google Patents
High cohesive strength anchor cable structure, tunnel surrounding anchor structure and its construction method Download PDFInfo
- Publication number
- CN108952784A CN108952784A CN201810956106.7A CN201810956106A CN108952784A CN 108952784 A CN108952784 A CN 108952784A CN 201810956106 A CN201810956106 A CN 201810956106A CN 108952784 A CN108952784 A CN 108952784A
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- China
- Prior art keywords
- drilling
- anchor cable
- slip casting
- anchor
- strand wires
- Prior art date
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Links
- 238000010276 construction Methods 0.000 title claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 99
- 239000010959 steel Substances 0.000 claims abstract description 99
- 238000005553 drilling Methods 0.000 claims abstract description 95
- 238000007569 slipcasting Methods 0.000 claims abstract description 62
- 239000011435 rock Substances 0.000 claims abstract description 24
- 206010058109 Hangnail Diseases 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 abstract description 15
- 230000000694 effects Effects 0.000 description 6
- 238000004873 anchoring Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 241000826860 Trapezium Species 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 235000011128 aluminium sulphate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 210000004911 serous fluid Anatomy 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of high cohesive strength anchor cable structures comprising: at least one is set to the anchor cable steel strand wires in drilling；First Grouting Pipe protrudes into the drilling, for carrying out first slip casting to the country rock in drilling at drilling orifice 1-3m, to form the first slip casting portion for closing the drilling orifice；Secondary grouting pipe protrudes into the drilling, for carrying out secondary grouting to other regions for not carrying out first slip casting in drilling；And guide part, it is set in the drilling, for passing through for the anchor cable steel strand wires, guides the anchor cable steel strand wires to enter in the drilling with this.It can effectively increase bond stress and anchor force between steel strand wires and injecting cement paste, the grouting pressure of secondary grouting is improved by way of gradation slip casting simultaneously, to improving cohesive strength between anchor rope grouting body and country rock, it is horizontal to improve prestressd anchor cable for slippage when preventing anchor cable drawing.
Description
Technical field
The present invention relates to geotechnical engineering field more particularly to a kind of high cohesive strength anchor cable structures, tunnel surrounding anchor structure
And its construction method.
Background technique
It include the process of upward perforating and slip casting in the anchoring procedure of tunnel vault, due to gravity, slip casting process more
In easily there is the phenomenon that downward spillage, cause slip casting effect poor, meanwhile, the cohesive strength between anchor rope grouting body and country rock is smaller,
Especially in weak surrounding rock, the cohesive strength between injecting cement paste and country rock is difficult to meet the requirement of the high pre-stress of anchor cable, into one
Step, since the antirust oil of anchor cable steel strand surface is difficult to completely, lead to steel strand wires and slip casting during on-site construction
Bond stress between body is greatly reduced, and thus prestress anchorage cable occurs what steel strand wires were slipped with anchoring section injecting cement paste in tensioning often
Phenomenon causes prestressing force that design requirement is not achieved, and current settling mode is mainly the slip casting body length of the extensible bolting section, by
This increases the bond stress between steel strand wires and injecting cement paste, prevents the two from slipping, but this kind of mode is due to increasing slip casting body length
And cause construction cost excessively high.
Summary of the invention
The present invention provides a kind of anchor cable structure in view of the above drawbacks of the prior art, can effectively increase steel strand wires and slip casting
Bond stress and anchor force between body, while the grouting pressure of secondary grouting is improved by way of gradation slip casting, to improve
It is horizontal to improve prestressd anchor cable for cohesive strength between anchor rope grouting body and country rock, slippage when preventing anchor cable drawing.
The technical solution adopted by the present invention to solve the technical problems is:
On the one hand, a kind of high cohesive strength anchor cable structure is provided comprising: at least one is set to the anchor cable steel in drilling and twists
Line；
First Grouting Pipe protrudes into the drilling, for carrying out to the country rock in drilling at drilling orifice 1-3m
First slip casting, to form the first slip casting portion for closing the drilling orifice；
Secondary grouting pipe protrudes into the drilling, for carrying out to other regions for not carrying out first slip casting in drilling
Secondary grouting；
And guide part, it is set in the drilling, for passing through for the anchor cable steel strand wires, the anchor is guided with this
Rope steel strand wires enter in the drilling.
Preferably, the anchor cable structure further includes the anchor cable hangnail being set on anchor cable steel strand wires described at least one；Institute
Stating anchor cable hangnail includes:
External anchor ring, and it is trapezoidal perforation that pass through for the anchor cable steel strand wires, longitudinal section is offered inside it；
And at least one intermediate plate, be used for when it is described state anchor cable steel strand wires across the perforation when, one end wedges institute
The gap between anchor cable steel strand wires and the perforation inner wall is stated, the other end is stretched out from the external anchor ring.
Preferably, the high cohesive strength anchor cable structure further include: at least one isolating frame is set in the drilling
Portion, comprising:
It is set to the first through hole at the isolating frame center；
Around several second through-holes of first through hole uniform intervals setting；The first through hole and/or the second through-hole
For being passed through for the anchor cable steel strand wires；
At least one venthole and at least one injected hole；The venthole is used to carry out just to the bore inner
When secondary slip casting/secondary grouting, air supply source enters, to adjust bore inner air pressure；The injected hole is used to supply the first slip casting
Pipe/secondary grouting pipe passes through, to carry out first slip casting/secondary grouting to the bore inner.
Preferably, the high cohesive strength anchor cable structure further include: steel pad pier is arranged in the drilling and leads far from described
It is connected to one end of part, and with the drilling, comprising: upper padding plate；The lower bolster being oppositely arranged with the upper padding plate；Connector,
It is used to connect the upper padding plate and the lower bolster；Several ribs, be arranged between the upper padding plate and lower bolster and
It is arranged around the connector.
Preferably, at least two Grouting Pipe manhole appendixes are offered on the connector；It is offered at the lower bolster center
With the third through-hole for drilling and being connected to；The first Grouting Pipe passes through a Grouting Pipe manhole appendix, third through-hole and isolating frame
An injected hole after extend into the drilling and carry out first slip casting, the secondary grouting pipe passes through a Grouting Pipe manhole appendix, the
It is extend into after one injected hole of three through-holes and isolating frame in the drilling and carries out secondary grouting.
Preferably, the high cohesive strength anchor cable structure further include: connecting tube, one end connects the third through-hole, another
End is protruded into the drilling, and is passed through for the Grouting Pipe.
On the other hand, a kind of tunnel surrounding anchor structure is also provided comprising: be provided with the drilling on tunnel surrounding, on
The grid steel frame stating anchor cable structure and being embedded in the country rock；The anchor cable steel strand wires, first Grouting Pipe, secondary grouting pipe
And guide part protrudes into the drilling；The grid steel frame includes: interior steel frame of steel, outer steel frame of steel and is set to interior steelframe
Filling member between part, outer steel frame of steel.
Preferably, the filling member includes: " ∞ " type part and/or " X " type part and/or " Z " type part.
On the other hand, also a kind of construction method of above-mentioned tunnel surrounding anchor structure comprising following steps:
S1, at least one drilling is opened up in tunnel surrounding；
S2, the steel pad pier is fixed on the tunnel inner wall face, and isolating frame and guiding are set in the drilling
Part；
S3, anchor cable steel strand wires one end are protruded into the drilling after passing through guide part, isolating frame, and the first slip casting
Pipe and secondary grouting pipe extend into the drilling after both passing through the injected hole for starching pipe manhole appendix, third through-hole and isolating frame
It is interior；
S4, first slip casting is carried out to the country rock in drilling at drilling orifice 1-3m by first Grouting Pipe, to be formed
Close the first slip casting portion of the drilling orifice；After the intensity in the first slip casting portion is greater than 20Mpa, pass through the secondary injection
Slurry pipe carries out secondary grouting to other regions for not carrying out first slip casting in drilling.
Preferably, in step S4, before carrying out first slip casting, the grid steel frame is buried in the country rock.
The beneficial effect of technical solution of the present invention is:
Anchor cable structure of the invention mainly passes through anchor cable hangnail and is set on anchor cable steel strand wires, can effectively increase steel strand wires with
Bond stress and anchor force between injecting cement paste, thus without increase slip casting body length can prevent anchoring section occur steel strand wires with
The phenomenon that injecting cement paste slips, while slip casting is carried out to drilling by the way of gradation slip casting, it thus can increase substantially secondary injection
The grouting pressure of slurry improves cohesive strength between anchor rope grouting body and country rock, improves slip casting effect, especially has to weak surrounding rock good
Good consolidation effect, and slippage when can prevent anchor cable drawing, it is horizontal to improve prestressd anchor cable.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is the overall structure figure of one stream line structure of the embodiment of the present invention；
Fig. 2 is the schematic diagram of one stream line structure anchor country rock of the embodiment of the present invention；
Fig. 3 is the vertical section schematic diagram of one stream line hangnail of the embodiment of the present invention；
Fig. 4 is the vertical section schematic diagram of guide part in the embodiment of the present invention one；
Fig. 5 is the cross-sectional view of isolating frame in the embodiment of the present invention one；
The cross-sectional view of steel pad pier in Fig. 6 the embodiment of the present invention one；
The cross-sectional view of steel pad pier in Fig. 7 the embodiment of the present invention one；
The partial structural diagram of grid steel frame in Fig. 8 the embodiment of the present invention two.
Specific embodiment
In order to which the purpose of the present invention, technical solution and advantage is more clearly understood, below in conjunction with drawings and examples,
The present invention will be described in further detail.It should be understood that specific embodiment described herein is only used for explaining this hair
It is bright, it is not intended to limit the present invention.
Embodiment one:
Fig. 1-2 shows anchor cable structure of the invention comprising: at least one is set to the anchor cable steel in drilling 100 and twists
Line 1；
Anchor cable hangnail 2 is set on anchor cable steel strand wires 1 described at least one, for when the slip casting into the drilling 100
When forming injecting cement paste, enhance the bond stress between the anchor cable steel strand wires 1 and the injecting cement paste, it is preferred that in the present embodiment, often
Equal uniform intervals are provided with several anchor cable hangnails 2 on the one anchor cable steel strand wires 1；
Length be 1-3m first Grouting Pipe 6, protrude into it is described drilling 100 in, for drilling 100 in apart from drilling hole
Tunnel surrounding at mouth 1-3m carries out first slip casting, to form the first slip casting portion S1 for closing the drilling orifice；
Secondary grouting pipe 7 protrudes into the drilling, for carrying out to other regions for not carrying out first slip casting in drilling
Secondary grouting, to form secondary grouting portion S2 on the first slip casting portion S1；
And guide part 3, it is set in one end of the drilling 100, for being passed through for the anchor cable steel strand wires 1, with
This guides the anchor cable steel strand wires 1 to enter in the drilling 100.
As shown in figure 3, the anchor cable hangnail 2 includes: external anchor ring 21, and offered inside it for anchor cable steel strand
Line 1 passes through, longitudinal section is trapezoidal perforation 22, it is preferred that 22 longitudinal sections of the perforation are isosceles trapezoid, and its taper angle theta is
8-12 ° (preferably 10 °)；
And at least one intermediate plate 23, be used for when it is described state anchor cable steel strand wires 1 pass through it is described perforation 22 when, one end wedge
Enter the gap between 22 inner walls of the anchor cable steel strand wires 1 and the perforation, the other end is stretched out from the external anchor ring 21；This reality
Apply in example, the intermediate plate 23 can be integrally molded so as complete truncated cone-shaped structure at least by 2, and with the anchor cable steel strand wires 1
Gap between 22 inner walls of the perforation is interference fitted, so that the anchor cable steel strand wires 1 and anchor cable hangnail 2 form one firmly
Overall structure, as a result, when to it is described drilling 100 in slip casting formed secondary injection slurry S2 when, the both ends of external anchor ring 21 and
The part that intermediate plate 23 stretches out the external anchor ring 21 forms " hangnail " structure and wedges in the injecting cement paste, enhances anchor cable steel strand wires 1
Bond stress between surface and injecting cement paste prevents anchor cable steel strand wires 1 from slipping from injecting cement paste；
As shown in figure 4, the guide part 3 includes: cylindrical portion 31, the circle that connect and be coaxially disposed with the cylindrical portion 31
Platform portion 32；And the cylindrical portion 33 for connecting and being coaxially disposed with the rotary table portion 32；Wherein, the cylindrical portion internal diameter D
It is 90-110mm (preferably 100mm) for 100-120mm (preferably 110mm), height H1；The taper angle theta 1 in the rotary table portion 32 is
75-85 ° (preferably 80 °), height H2 is 45-55mm (preferably 50mm)；33 internal diameter of cylindrical portion is 15-25mm
(preferably 21mm), height H3 are 10-20mm (preferably 15mm).
In addition, such as Fig. 1, shown in 5, the high cohesive strength anchor cable structure further include: at least one round isolating frame 4 is (preferably
By being made with a thickness of the rubber of 50mm), it is set to inside the drilling 300, for for anchor cable steel strand wires 1 described at least one
It passes through；When the isolating frame 4 has multiple, it is disposed in an evenly spaced relation in the drilling 100, to guarantee uniform force；And
At least one binding piece 8, be used for pass through the isolating frame anchor cable steel strand wires 1 tie up, prevent its it is unordered scatter, make
It is uniform to obtain slip casting；
Specifically, the isolating frame 4 includes:
It is set to the first through hole 41 at 4 center of isolating frame；
Around several second through-holes 42 of 41 uniform intervals of first through hole setting；The first through hole 41 and/or
Two through-holes 42 are used to pass through for the anchor cable steel strand wires 1；In the present embodiment, the sum of the first through hole 41 and the second through-hole 42
Corresponding with the anchor cable steel strand wires 1 number, the first through hole 41 is equipped with an anchor cable with corresponding in every one second through-hole 42
Steel strand wires 1；
At least one venthole 43 and at least one injected hole 44；The venthole 43 is used for the drilling 100
When inside carries out first slip casting/secondary grouting, air supply source enters, with adjustment 100 air pressure insides of drilling；The injected hole 44 is used for
It passes through for first 6/ secondary grouting pipe 7 of Grouting Pipe, to carry out first slip casting/secondary grouting to 100 inside of drilling, is formed just
Secondary slip casting portion S1/ secondary grouting portion S2, in the present embodiment, the venthole 43 and injected hole 44 are 2；
Steel pad pier 5 is arranged in one end far from the guide part 3 in the drilling 100, and connects with the drilling 100
It is logical, for the prestressing force of anchor cable steel strand wires 1 to be uniformly diffused into country rock surface, specifically, such as Fig. 1, shown in 6-7 comprising: on
Backing plate 51；The lower bolster 52 being oppositely arranged with the upper padding plate 51, and offered and the drilling at 52 center of the lower bolster
The third through-hole 521 of 100 connections；Connector 53 can be cylinder-like structure, for connecting the upper padding plate 51 and the underlay
Plate 52, and be made of Steel material；Several ribs 54 are arranged between the upper padding plate 51 and lower bolster 52 and surround
The connector 53 is arranged, it is preferred that the ribs 54 can be right-angled trapezium, and the ribs 54 of the right-angled trapezium is short
Parallel edges 541 connects the upper padding plate 51, and long parallel edges 542 connects the lower bolster 312, and right-angle side 543 connects the company
The outside wall surface of fitting 53, bevel edge 544 is far from the connector 53；Hard layer 55 (can be made) of M40 dry pre contract mortar,
The drilling 100 is covered in close to the side opening of the steel pad pier 5, middle part offers fourth hole 551；And connecting tube
56 (preferably steel pipes), one end connect the third through-hole 521, and the other end protrudes into described after the fourth hole 551
In drilling 100, and passed through for Grouting Pipe 200.
At least two Grouting Pipe manhole appendixes 531 are offered on the connector 53；The first Grouting Pipe 6 passes through a slip casting
It extend into after one injected hole 44 of pipe manhole appendix 531, third through-hole 521 and isolating frame in the drilling 100 and is infused for the first time
Slurry, similar, the secondary grouting pipe 7 passes through a slip casting of a Grouting Pipe manhole appendix 531, third through-hole 521 and isolating frame
It is extend into behind hole 44 in the drilling 100 and carries out secondary grouting.
On this basis, to play better fixed effect, at least one can be also opened up on the lower bolster 52 for spiral shell
The bolt fixing hole that bolt 57 passes through, described 57 one end of bolt are fixedly connected after passing through the lower bolster 52 with the hard layer 55,
The other end is fastenedly connected with nut 58, is fastenedly connected lower bolster 52 and the hard layer 55 with this.
Embodiment two:
The present embodiment additionally provides a kind of tunnel surrounding anchor structure, as shown in Fig. 2, comprising: being provided with tunnel surrounding
On drilling 100, anchor cable structure as described in the examples and the grid steel frame 200 being embedded in the country rock；The anchor cable
Steel strand wires 1, first Grouting Pipe 6, secondary grouting pipe 7 protrude into the drilling 100；
As shown in figure 8, the grid steel frame 200 includes: interior steel frame of steel 201, outer steel frame of steel 202 and is set to interior steelframe
Filling member between part 201, outer steel frame of steel 202；Specifically, the filling member includes: " ∞ " type part 203 and/or " X " type part
204 and/or " Z " 205 type part, it is preferred that the structure of adjacent two filling member is different, thus can be by grid steel frame 200 to country rock
It is further supported and is reinforced, enhance its structural strength.
Embodiment three:
The present embodiment additionally provides a kind of construction method of tunnel surrounding anchor structure as described in embodiment two comprising
Following steps:
S1, at least one drilling is opened up in tunnel surrounding；
S2, the steel pad pier is fixed on the tunnel inner wall face, and isolating frame and guiding are set in the drilling
Part；
S3, anchor cable steel strand wires one end are protruded into the drilling after passing through guide part, isolating frame, and the other end is fixed on institute
It states in steel pad pier, and the first Grouting Pipe and secondary grouting pipe both pass through slurry pipe manhole appendix, third through-hole and isolating frame
An injected hole after extend into the drilling；
S4, the grid steel frame is buried in the country rock, it is interior to drilling apart from drilling orifice 1- by first Grouting Pipe
Country rock at 3m carries out first slip casting, and first grouting serous fluid includes aluminium sulfate high-early (strength) cement, closes the drilling hole to be formed
The first slip casting portion of mouth；It is interior to drilling not by the secondary grouting pipe after the intensity in the first slip casting portion is greater than 20Mpa
Other regions for carrying out first slip casting carry out secondary grouting, and grouting pressure is 3~9Mpa, and secondary grouting slurries include cement slurry
Liquid.
It is set on anchor cable steel strand wires in conclusion anchor cable structure of the invention of the invention mainly passes through anchor cable hangnail,
The bond stress and anchor force between steel strand wires and injecting cement paste can be effectively increased, can be prevented thus without slip casting body length is increased
There is the phenomenon that steel strand wires and injecting cement paste slippage in anchoring section, while carrying out slip casting to drilling by the way of gradation slip casting, thus
The grouting pressure of secondary grouting can be increased substantially, cohesive strength between anchor rope grouting body and country rock is improved, improves slip casting effect, especially
It has good consolidation effect to weak surrounding rock, and slippage when can prevent anchor cable drawing, and it is horizontal to improve prestressd anchor cable.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of high cohesive strength anchor cable structure characterized by comprising at least one is set to the anchor cable steel strand wires in drilling；
First Grouting Pipe protrudes into the drilling, first for carrying out to the country rock in drilling at drilling orifice 1-3m
Slip casting, to form the first slip casting portion for closing the drilling orifice；
Secondary grouting pipe protrudes into the drilling, secondary for carrying out to other regions for not carrying out first slip casting in drilling
Slip casting；
And guide part, it is set in the drilling, for passing through for the anchor cable steel strand wires, the anchor cable steel is guided with this
Twisted wire enters in the drilling.
2. anchor cable structure as described in claim 1, which is characterized in that the anchor cable structure further includes being set at least one institute
State the anchor cable hangnail on anchor cable steel strand wires；The anchor cable hangnail includes:
External anchor ring, and it is trapezoidal perforation that pass through for the anchor cable steel strand wires, longitudinal section is offered inside it；
And at least one intermediate plate, be used for when it is described state anchor cable steel strand wires across the perforation when, one end wedges the anchor
Gap between rope steel strand wires and the perforation inner wall, the other end are stretched out from the external anchor ring.
3. such as the described in any item anchor cable structures of claim 1-2, which is characterized in that the high cohesive strength anchor cable structure also wraps
Include: at least one isolating frame is set to the bore inner, comprising:
It is set to the first through hole at the isolating frame center；
Around several second through-holes of first through hole uniform intervals setting；The first through hole and/or the second through-hole are used for
It is passed through for the anchor cable steel strand wires；
At least one venthole and at least one injected hole；The venthole for being infused for the first time to the bore inner
When slurry/secondary grouting, air supply source enters, to adjust bore inner air pressure；The injected hole is used to supply first Grouting Pipe/bis-
Secondary Grouting Pipe passes through, to carry out first slip casting/secondary grouting to the bore inner.
4. anchor cable structure as claimed in claim 3, which is characterized in that the high cohesive strength anchor cable structure further include: steel pad pier,
One end in the drilling far from the guide part is arranged in it, and is connected to the drilling, comprising: upper padding plate；On described
The lower bolster that backing plate is oppositely arranged；Connector is used to connect the upper padding plate and the lower bolster；Several ribs, set
It sets between the upper padding plate and lower bolster and is arranged around the connector.
5. anchor cable structure as claimed in claim 4, which is characterized in that offered on the connector at least two Grouting Pipes into
Portal；It is offered at the lower bolster center and the third through-hole for drilling and being connected to；The first Grouting Pipe passes through a slip casting
It is extend into after one injected hole of pipe manhole appendix, third through-hole and isolating frame in the drilling and carries out first slip casting, it is described secondary
Grouting Pipe, which is extend into the drilling after an injected hole of a Grouting Pipe manhole appendix, third through-hole and isolating frame, carries out two
Secondary slip casting.
6. anchor cable structure as claimed in claim 5, which is characterized in that the high cohesive strength anchor cable structure further include: connecting tube,
One end connects the third through-hole, and the other end protrudes into the drilling, and passes through for the Grouting Pipe.
7. a kind of tunnel surrounding anchor structure characterized by comprising be provided with drilling on tunnel surrounding, such as claim 6
The anchor cable structure and the grid steel frame being embedded in the country rock；The anchor cable steel strand wires, first Grouting Pipe, secondary injection
Slurry pipe and guide part protrude into the drilling；
The grid steel frame includes: interior steel frame of steel, outer steel frame of steel and the filling being set between interior steel frame of steel, outer steel frame of steel
Part.
8. tunnel surrounding anchor structure as claimed in claim 7, which is characterized in that the filling member include: " ∞ " type part and/
Or " X " type part and/or " Z " type part.
9. a kind of construction method of tunnel surrounding anchor structure as claimed in claim 7, which comprises the steps of:
S1, at least one drilling is opened up in tunnel surrounding；
S2, the steel pad pier is fixed on the tunnel inner wall face, and isolating frame and guide part are set in the drilling；
S3, anchor cable steel strand wires one end pass through guide part, protrude into the drilling after isolating frame, and the first Grouting Pipe with
And secondary grouting pipe both pass through an injected hole of slurry pipe manhole appendix, third through-hole and isolating frame after extend into the drilling；
S4, first slip casting is carried out to the country rock in drilling at drilling orifice 1-3m by first Grouting Pipe, to form closing
The first slip casting portion of the drilling orifice；After the intensity in the first slip casting portion is greater than 20Mpa, pass through the secondary grouting pipe
Secondary grouting is carried out to other regions for not carrying out first slip casting in drilling.
10. construction method as claimed in claim 9, which is characterized in that in step S4, before carrying out first slip casting, described
The grid steel frame is buried in country rock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810956106.7A CN108952784A (en) | 2018-08-21 | 2018-08-21 | High cohesive strength anchor cable structure, tunnel surrounding anchor structure and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810956106.7A CN108952784A (en) | 2018-08-21 | 2018-08-21 | High cohesive strength anchor cable structure, tunnel surrounding anchor structure and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108952784A true CN108952784A (en) | 2018-12-07 |
Family
ID=64473354
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810956106.7A Pending CN108952784A (en) | 2018-08-21 | 2018-08-21 | High cohesive strength anchor cable structure, tunnel surrounding anchor structure and its construction method |
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| CN (1) | CN108952784A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980733A (en) * | 2020-07-28 | 2020-11-24 | 中铁工程设计咨询集团有限公司 | Anchor cable and construction method thereof |
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2018
- 2018-08-21 CN CN201810956106.7A patent/CN108952784A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111980733A (en) * | 2020-07-28 | 2020-11-24 | 中铁工程设计咨询集团有限公司 | Anchor cable and construction method thereof |
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