CN207660614U - Roadway floor prestress anchorage cable group coordinates ruggedized construction with slip casting - Google Patents
Roadway floor prestress anchorage cable group coordinates ruggedized construction with slip casting Download PDFInfo
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- CN207660614U CN207660614U CN201721696933.4U CN201721696933U CN207660614U CN 207660614 U CN207660614 U CN 207660614U CN 201721696933 U CN201721696933 U CN 201721696933U CN 207660614 U CN207660614 U CN 207660614U
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Abstract
Roadway floor prestress anchorage cable group coordinates ruggedized construction with slip casting, including several groups anchor cable beam, every group of anchor cable beam is arranged in the vertical drilling in roadway floor, every group of anchor cable Shu Jun includes a guiding cap, one pallet, a set of three hole anchorage and three steel strand wires, the lower end of three steel strand wires is fixedly connected with the guiding cap for extending into vertical foot of hole, being horizontally disposed at the aperture vertically to drill has several steel channel beams, 2 groups or 3 groups of anchor cable beams are used in conjunction with a steel channel beam, grouting anchoring section is formed from bottom to top by injecting cement mortar in vertical drilling, grouting and reinforcing section and sealing of hole sections.The utility model had both realized high-strength active support of the prestress anchorage cable group to broken rock, actively strengthen bottom plate bearing capacity further through grouting and reinforcing, superficial part rock stratum is anchored at deep to stablize in rock stratum, it is truly realized " high intensity, high pre-stress, big depth " active immediate support, to ensure roadway floor stability under complicated hard situation.
Description
Technical field
The utility model belongs to mining engineering Roadway Support Technology field, and in particular to a kind of roadway floor prestress anchorage cable
Group coordinates ruggedized construction with slip casting.
Background technology
With the gradually exploitation of coal resources, coal mining depth increasingly increases, adopts rotating ring border increasingly complexity, deep rock mass
Show soft rock characteristic, drift section rises to big cross section or extra-large cross-section, cause Floor Heave in Roadway problem to be on the rise.For coal
Mine roadway floor Deformation control, currently used support technology means mainly have：Closed supports supporting, the arch supporting of anti-bottom, anchor pole
Supporting, cable bolting and grouting and reinforcing etc. although alleviating roadway floor deformation using conventional technical means, but still exist
Problems with：In design of its support thinking, however it remains the problem of " weight top plate and two help, light bottom plate "；It is controlled in bottom deformation
Technically, then there are problems that bottom plate " supporting intensity is small, prestressing force is insufficient, supporting depth is inadequate ", cause plate destructing depth
It is lasting to increase so that bottom plate is in the vicious circle of " often overhauling, frequent pucking ", and Floor Heave in Roadway problem cannot be effective
Radical cure.
Utility model content
The utility model in order to solve shortcoming in the prior art, provide a kind of roadway floor prestress anchorage cable group with
Ruggedized construction is coordinated in slip casting, and the structure to top plate and two on the basis of helping to carry out strength supporting, by " prestress anchorage cable group's supporting
And grouting and reinforcing " combine, it can effectively solve in existing roadway floor deformed Control Technology that " supporting intensity is small, answers in advance
Power is insufficient, supporting depth is inadequate " the problem of, and actively strengthen bottom plate bearing capacity by grouting and reinforcing, really realize tunnel bottom
Plate " high intensity, high pre-stress, big depth " active immediate support, and then it is tight effectively to control soft-rock tunnel under the high stress of deep
Weight pucking problem.
In order to solve the above technical problems, the utility model adopts the following technical solution：Roadway floor prestress anchorage cable group with
Ruggedized construction, including several groups anchor cable beam are coordinated in slip casting, and every group of anchor cable beam is arranged in the vertical drilling in roadway floor, often
Group anchor cable Shu Jun includes a guiding cap, a pallet, a set of three hole anchorage and three steel strand wires, and the lower end of three steel strand wires is solid
Surely it is connected with the guiding cap for extending into vertical foot of hole, being horizontally disposed at the aperture vertically to drill there are several steel channel beams, by 2
Group or 3 groups of anchor cable beams are used in conjunction with a steel channel beam, and steel strand wires threading hole and perforation hole, three steel strand wires are offered on steel channel beam
Upper end is upward through steel strand wires threading hole, and pallet is sleeved on three steel strand wires, will be oriented in vertical foot of hole injection cement mortar
Grouting anchoring section is formed after the pre-buried solidification of cap, three steel strand wires correspondences are through in the hole of three hole anchorages, and on three steel strand wires
End applies prestressing force tensioning；Grouting anchoring section arrangement above in vertical drilling has grouting and reinforcing section and sealing of hole sections；Several groups
It combines with the mating steel channel beam of anchor cable beam that grouting anchoring section, grouting and reinforcing section, sealing of hole sections are combined and forms prestressed anchor
Suo Qun coordinates ruggedized construction with slip casting.
The top of guiding cap is columnar structured, and the lower part of guiding cap is the upper thick conical structure of lower point, and three steel twist
The lower end of line extend into guiding cap and is welded as a whole with the inner ring of guiding cap.
Three steel strand wires outer covers are equipped with several retaining collars, and retaining collar is evenly arranged along the length of steel strand wires, Gu
Determine that there is frictional force between lantern ring inner wall and three steel strand wires.
The top of sealing of hole sections is provided with steel channel beam, steel strand wires upper end, three hole anchorages and the pre-buried bottom plate hardened layer of pallet,
Bottom plate hardened layer is poured by armored concrete.
Using above-mentioned technical proposal, the construction method of the utility model includes the following steps,
（1）The tunnel of driving setting section configuration and size first in subterranean strata, then according to the top plate in tunnel and
Two support parameters helped are helped to be laid with metal mesh in top plate and two, bore bolthole, anchor cable hole and injected hole, in bolthole and
Anchor pole and anchor cable are set in anchor cable hole and is anchored, and to carrying out slip casting in injected hole, last gunite concrete passes through high-strength high preload
Power bolt-mesh-anchor support and grouting and reinforcing strength supporting, it is ensured that top plate and two stability helped, to reduce bottom deformation；
（2）The high strength steel strand of 3 diameter 22mm is combined into one, anchor cable beam is fabricated to, in the most lower of anchor cable beam
End fixed setting guiding cap, and it is equipped with the retaining collar that a pair is used to tight anchor cable beam at interval of 500mm, in the upper end of anchor cable beam
Make mating steel channel beam, pallet and three hole anchorages；
（3）Tunnel excavate and top plate, two help supporting after the completion of, boring head 40m-60m is lagged, according to vertical in bottom plate
The arrangement parameter of drilling sets several vertical drillings to projected depth；Then guiding cap and fixing sleeve are carried by what is made
The anchor cable beam of ring pushes to the bottom hole vertically to drill, and the upper end of anchor cable beam is upward through the steel strand wires threading hole of steel channel beam, in slot
Plastics sebific duct is penetrated in the perforation hole opened up on girder steel and extend into the bottom hole vertically to drill, and the cement mortar being stirred is passed through
Plastics sebific duct is counter to be in the milk, and plastics sebific duct is up carried in grouting, until reaching design grout penetration, forms grouting anchoring
Section, guiding cap are embedded into grouting anchoring section；Plastics sebific duct is taken out, and is grown by the pre-buried design of the perforation hole on steel channel beam
The Grouting Pipe of degree, and anchor cable beam top is wrapped in for sealing of hole later using woven bag, woven bag distance vertically drills
Aperture 500mm；
（4）After grouting anchoring section solidifies 2 days, 2 groups or 3 groups of anchor cable beams are combined by being laid with steel channel beam, then
Pallet and three hole anchorages are installed on anchor cable beam, and 3 steel strand wires for forming anchor cable beam are stretched to design pretightning force respectively；It will
Anchor cable beam combines to form prestress anchorage cable group according to rejecting by steel channel beam for 1800 × 1800mm, realizes roadway floor
High intensity, high pre-stress, big depth active support；
（5）Injection cement mortar carries out sealing of hole in vertical drilling on woven bag, and sealing of hole sections are formed after solidification；
（6）After the completion of sealing of hole, roadway floor ground is hardened, forms bottom plate hardened layer, hardening thickness 300mm, slot
In girder steel, steel strand wires upper end, three hole anchorages and pallet embedment bottom plate hardened layer, bottom plate hardened layer is stretched out in Grouting Pipe upper end；
（7）After the completion of roadway floor hardened ground, according to floor grouting parameter, pumped using wind-driving grouting, by pre-buried
Grouting Pipe injects cement mortar, reinforcing soleplate breaking surrounding rock, after solidification in the vertical drilling between grouting anchoring section and sealing of hole sections
Form grouting and reinforcing section.
In step（2）、（5）、（6）In, between the quantity and specification, adjacent retaining collar that make the steel strand wires of anchor cable beam
Distance and the steel channel beam mating with anchor cable beam, the specification of pallet and three hole anchorages, sealing material and hardened ground thickness root
It is adjusted according to actual production conditions.
In step（3）In, rock stratum 2m or more is stablized in the drilling depth requirement entrance vertically to drill, the material of the slurries poured into
Type and parameter should be determined according to the function Characteristics of bottom plate and slurries.
In step（4）In, the design pretightning force of anchor cable beam requires to reach capacity 50% or more of load, the spacing of anchor cable beam
It should be able to achieve the purpose that effectively to spread prestressing force and effective slip casting with the reasonable selection of array pitch.
The utility model has the following technical effects：The utility model is helping back and two to carry out strength supporting
On the basis of, it is deformed using " structure of prestress anchorage cable group supporting and grouting and reinforcing " Collaborative Control roadway floor, by using " first
The construction method of grouting anchoring, again tensioning preload, grouting behind shaft or drift lining reinforcing ", had both realized height of the prestress anchorage cable group to broken rock
Strong active support actively strengthens bottom plate bearing capacity further through grouting and reinforcing, and superficial part rock stratum, which is anchored at deep, stablizes in rock stratum,
It is truly realized " high intensity, high pre-stress, big depth " active immediate support, can effectively solve the problem that in existing Control of floor technology
The problem of " supporting intensity is small, prestressing force is insufficient, supporting depth is inadequate ", to ensure that roadway floor is stablized under complicated hard situation
Property.
Guiding cap in the utility model is the upper thick conical structure of lower point, and vertical drilling is dropped downward into anchor cable beam
During bottom, the blocking of hole wall uneven structure is can avoid, the process to cause to fall and break to bottom hole is more smooth.In addition it is oriented to
Cap is being embedded into grouting anchoring section, plays the role of firm anchoring steel strand wires lower end.
In addition, since three steel strand wires are one group of anchor cable beam, in order to make three steel strand wires drop downward into vertical drilling
It does not shake apart, wind during bottom, be specially uniformly arranged several retaining collars in the outside of three steel strand wires, be tensioned
When steel strand wires, retaining collar does not interfere with the tensioning of any bar between three steel strand wires.
Description of the drawings
Fig. 1 is the front view of the utility model；
Fig. 2 is the vertical view of the utility model roadway floor prestress anchorage cable group's supporting arrangement；
Fig. 3 is one group of anchor cable beam and the structural schematic diagram of slip casting in the utility model.
In Fig. 1-Fig. 3,1 is tunnel, and 2 be metal mesh, and 3 be anchor pole, and 4 be anchor cable, and 5 be concrete spray coating, and 6 be injected hole, 7
It is guiding cap for anchor cable beam, 8,9 be retaining collar, and 10 be steel channel beam；11 be pallet, and 12 be three hole anchorages, and 13 be vertical drilling,
14 be Grouting Pipe, and 15 be woven bag, and 16 be steel strand wires, and 17 be prestress anchorage cable group, and 18 be bottom plate hardened layer, and I is grouting anchoring
Section, II is grouting and reinforcing section, and III is sealing of hole sections.
Specific implementation mode
As shown in Figure 1, Figure 2 and Figure 3, the roadway floor prestress anchorage cable group of the utility model coordinates to reinforce knot with slip casting
Structure, including several groups anchor cable beam 7, every group of anchor cable beam 7 are arranged in the vertical drilling in roadway floor, and every group of anchor cable beam 7 is equal
Including 8, pallets 11 of a guiding cap, a set of three hole anchorage 12 and three steel strand wires 16, the lower end of three steel strand wires 16 is solid
Surely it is connected with the guiding cap 8 for extending into vertical foot of hole, being horizontally disposed at the aperture vertically to drill has several steel channel beams 10,
2 groups or 3 groups of anchor cable beams 7 are used in conjunction with a steel channel beam 10, offer steel strand wires threading hole and perforation hole on steel channel beam 10, three
16 upper end of root steel strand wires is upward through steel strand wires threading hole, and pallet 11 is sleeved on three steel strand wires 16, the injection in vertical drilling
Cement mortar will form grouting anchoring section I after 8 pre-buried solidification of guiding cap, three steel strand wires 16 correspond to the hole for being through three hole anchorages 12
It is interior, and prestressing force tensioning is applied to three 16 upper ends of steel strand wires；It is provided with injection water on grouting anchoring section I in vertical drilling
The grouting and reinforcing section II and sealing of hole sections III formed after being solidified after mud.Several groups and grouting anchoring section I, grouting and reinforcing section II, envelope
The mating steel channel beam of anchor cable beam that hole section III is combined 10, which combines, to be formed prestress anchorage cable group and coordinates ruggedized construction with slip casting.
The top of guiding cap 8 is columnar structured, and the lower part of guiding cap 8 is the upper thick conical structure of lower point, three steel
The lower end of twisted wire 16 extend into guiding cap 8 and is welded as a whole with the inner ring of guiding cap 8.
Three 16 outer covers of steel strand wires are equipped with several retaining collars 9, length uniform cloth of the retaining collar 9 along steel strand wires 16
It sets, there is frictional force between 9 inner wall of retaining collar and three steel strand wires 16.
The top of sealing of hole sections III is provided with steel channel beam 10,16 upper end of steel strand wires, three hole anchorages 12 and pallet 11 is pre-buried
Bottom plate hardened layer 18, bottom plate hardened layer 18 are poured by armored concrete.
The construction method of the utility model, includes the following steps,
（1）The tunnel 1 of driving setting section configuration and size first in subterranean strata, then according to the top plate in tunnel 1
The support parameters helped with two are helped to be laid with metal mesh 2 in top plate and two, bolthole, anchor cable hole and injected hole 6 are bored, in anchor pole
Anchor pole 3 and anchor cable 4 are set in hole and anchor cable hole and is anchored, and to carrying out slip casting in injected hole 6, last gunite concrete forms coagulation
Native spray-up 5 passes through high-strength high pretightening force bolt-mesh-anchor support and grouting and reinforcing strength supporting, it is ensured that top plate and two stability helped,
To reduce roadway floor deformation；
（2）The high strength steel strand 16 of 3 diameter 22mm is combined into one, anchor cable beam 7 is fabricated to, in anchor cable beam 7
Guiding cap 8 is fixedly installed in bottom, and is equipped with the retaining collar 9 that a pair is used to tight anchor cable beam 7 at interval of 500mm, in anchor cable
The upper end of beam 7 makes mating steel channel beam 10, pallet 11 and three hole anchorages 12；
（3）Tunnel 1 excavate and top plate, two help supporting after the completion of, lag boring head 40m-60m（This distance can root
It is adjusted according to actual conditions, premised on not influencing driving）, according to the arrangement parameter vertically to drill on bottom plate, it is perpendicular to set several
To drilling to projected depth；Then the anchor cable beam 7 with guiding cap 8 and retaining collar 9 made is pushed into vertical drilling
Bottom hole, the upper end of anchor cable beam 7 is upward through the steel strand wires threading hole of steel channel beam 10, in the perforation hole opened up on steel channel beam 10
It penetrates plastics sebific duct and extend into the bottom hole vertically to drill, and the cement mortar being stirred is in the milk by the way that plastics sebific duct is counter,
Plastics sebific duct is up carried in grouting, until reaching design grout penetration, forms grouting anchoring section I, guiding cap 8 is embedded into filling
It starches in anchoring section I；Plastics sebific duct is taken out, and by the Grouting Pipe 14 of the pre-buried design length of perforation hole on steel channel beam 10, and
7 top of anchor cable beam is wrapped in for sealing of hole later using woven bag 15, and woven bag 15 is apart from the aperture vertically to drill
500mm；
（4）After grouting anchoring section I solidifies 2 days, 2 groups or 3 groups of anchor cable beams 7 are combined by being laid with steel channel beam 10,
Then pallet 11 and three hole anchorages 12 on anchor cable beam 7 are installed, and 3 steel strand wires 16 for forming anchor cable beam 7 are stretched to respectively
Design pretightning force；Anchor cable beam 7 is combined to form into prestressed anchor according to rejecting by steel channel beam 10 for 1800 × 1800mm
Suo Qun 17 realizes the high intensity of roadway floor, high pre-stress, big depth active support；
（5）Injection cement mortar carries out sealing of hole in vertical drilling on woven bag 15, and sealing of hole sections III are formed after solidification；
（6）After the completion of sealing of hole, roadway floor ground is hardened, forms bottom plate hardened layer 18, hardening thickness 300mm,
Steel channel beam 10,16 upper end of steel strand wires, three hole anchorages 12 and pallet 11 are embedded in bottom plate hardened layer 18, and bottom is stretched out in 14 upper end of Grouting Pipe
Plate hardened layer 18；
（7）After the completion of roadway floor hardened ground, according to floor grouting parameter, pumped using wind-driving grouting, by pre-buried
Grouting Pipe 14 injects cement mortar in the vertical drilling between grouting anchoring section I and sealing of hole sections III, and reinforcing soleplate breaking surrounding rock is coagulated
Gu grouting and reinforcing section II is formed after.
In step（2）In, make the distance between quantity and specification, adjacent retaining collar 9 of the steel strand wires 16 of anchor cable beam 7
And with anchor cable beam 7 mating steel channel beam 10, pallet 11 and three hole anchorages 12 specification, sealing material and hardened ground thickness
It is adjusted according to actual production conditions.
In step（3）In, rock stratum 2m or more is stablized in the drilling depth requirement entrance vertically to drill, the slurries poured into（Cement
Slurry）Material type and parameter should be determined according to the function Characteristics of bottom plate and slurries.
In step（4）In, the design pretightning force of anchor cable beam 7 requires to reach capacity 50% or more of load, between anchor cable beam 7
It should be able to achieve the purpose that effectively to spread prestressing force and effective slip casting away from the reasonable selection with array pitch.
The present embodiment not makes any form of restriction the shape of the utility model, material, structure etc., every foundation
The technical essence of the utility model belongs to this reality to any simple modification, equivalent change and modification made by above example
With the protection domain of new technique scheme.
Claims (4)
1. roadway floor prestress anchorage cable group coordinates ruggedized construction with slip casting, it is characterised in that：Including several groups anchor cable beam, every group
Anchor cable beam is arranged in the vertical drilling in roadway floor, and every group of anchor cable Shu Jun include a guiding cap, a pallet, a set of
Three hole anchorages and three steel strand wires, the lower end of three steel strand wires are fixedly connected with the guiding cap for extending into vertical foot of hole, erect
Being horizontally disposed with to the aperture of drilling has several steel channel beams, and 2 groups or 3 groups of anchor cable beams are used in conjunction with a steel channel beam, channel steel
Steel strand wires threading hole and perforation hole are offered on beam, three steel strand wires upper ends are upward through steel strand wires threading hole, and pallet is sleeved on three
On root steel strand wires, grouting anchoring section is formed after vertical foot of hole injects cement mortar by the pre-buried solidification of guiding cap, three steel twist
Line correspondence is through in the hole of three hole anchorages, and applies prestressing force tensioning to three steel strand wires upper ends；Grouting in vertical drilling
Anchoring section arrangement above has grouting and reinforcing section and sealing of hole sections；Several groups are combined with grouting anchoring section, grouting and reinforcing section, sealing of hole sections
The mating steel channel beam of anchor cable beam combine and form prestress anchorage cable group and slip casting and coordinate ruggedized construction.
2. roadway floor prestress anchorage cable group according to claim 1 coordinates ruggedized construction with slip casting, it is characterised in that：It leads
It is columnar structured to the top of cap, the lower part of guiding cap is the upper thick conical structure of lower point, and the lower end of three steel strand wires is stretched
Enter into guiding cap and is welded as a whole with the inner ring of guiding cap.
3. roadway floor prestress anchorage cable group according to claim 1 coordinates ruggedized construction with slip casting, it is characterised in that：Three
Root steel strand wires outer cover is equipped with several retaining collars, and retaining collar is evenly arranged along the length of steel strand wires, retaining collar inner wall
There is frictional force between three steel strand wires.
4. roadway floor prestress anchorage cable group according to claim 1 coordinates ruggedized construction with slip casting, it is characterised in that：Envelope
The top of hole section is provided with steel channel beam, steel strand wires upper end, three hole anchorages and the pre-buried bottom plate hardened layer of pallet, bottom plate hardened layer
It is poured by armored concrete.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721696933.4U CN207660614U (en) | 2017-12-08 | 2017-12-08 | Roadway floor prestress anchorage cable group coordinates ruggedized construction with slip casting |
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| CN201721696933.4U CN207660614U (en) | 2017-12-08 | 2017-12-08 | Roadway floor prestress anchorage cable group coordinates ruggedized construction with slip casting |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107747493A (en) * | 2017-12-08 | 2018-03-02 | 河南理工大学 | Roadway floor prestress anchorage cable group coordinates ruggedized construction and construction method with slip casting |
| CN109681252A (en) * | 2019-01-17 | 2019-04-26 | 平顶山平煤设计院有限公司 | A kind of slip casting combination of steel rope device and construction method |
| CN112081602A (en) * | 2020-07-27 | 2020-12-15 | 枣庄矿业(集团)付村煤业有限公司 | Advanced support technology for fully mechanized mining face of thick coal seam |
| CN114753864A (en) * | 2022-04-21 | 2022-07-15 | 北京科技大学 | Coal mine floor heave roadway side-control bottom-locking long and short anchor cable and composite grouting combined reinforcement method |
-
2017
- 2017-12-08 CN CN201721696933.4U patent/CN207660614U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107747493A (en) * | 2017-12-08 | 2018-03-02 | 河南理工大学 | Roadway floor prestress anchorage cable group coordinates ruggedized construction and construction method with slip casting |
| CN109681252A (en) * | 2019-01-17 | 2019-04-26 | 平顶山平煤设计院有限公司 | A kind of slip casting combination of steel rope device and construction method |
| CN112081602A (en) * | 2020-07-27 | 2020-12-15 | 枣庄矿业(集团)付村煤业有限公司 | Advanced support technology for fully mechanized mining face of thick coal seam |
| CN114753864A (en) * | 2022-04-21 | 2022-07-15 | 北京科技大学 | Coal mine floor heave roadway side-control bottom-locking long and short anchor cable and composite grouting combined reinforcement method |
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