CN110017152A - A kind of underground engineering country rock substep grouting strengthening method smashed to pieces - Google Patents
A kind of underground engineering country rock substep grouting strengthening method smashed to pieces Download PDFInfo
- Publication number
- CN110017152A CN110017152A CN201910224615.5A CN201910224615A CN110017152A CN 110017152 A CN110017152 A CN 110017152A CN 201910224615 A CN201910224615 A CN 201910224615A CN 110017152 A CN110017152 A CN 110017152A
- Authority
- CN
- China
- Prior art keywords
- pieces
- country rock
- smashed
- grouting
- cable anchor
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- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention discloses a kind of underground engineering country rock substep grouting strengthening methods smashed to pieces comprising following steps: S1, carrying out grouting and reinforcing to superficial part country rock smashed to pieces；S2, grouting and reinforcing is carried out to middle part country rock smashed to pieces by middle part grouting cable anchor；S3, pull-out test is carried out to the middle part grouting cable anchor, judges whether pulling capacity reaches setting range, if so, S4 is thened follow the steps, if it is not, thening follow the steps S5；S4, grouting and reinforcing is carried out to deep country rock smashed to pieces；S5, the adjustment middle part grouting cable anchor supporting parameter.The present invention can carry out the country rock smashed to pieces in underground engineering quickly, effectively to reinforce；Keep superficial part country rock rapid condensation smashed to pieces integral, improves country rock globality, efficiently solve country rock collapse hole and bit freezing phenomenon；Make middle part and deep country rock enhancing self-bearing capacity smashed to pieces, improve country rock preliminary bracing intensity, improves coffer mechanics performance smashed to pieces and control its deformation and destroy.
Description
Technical field
The present invention relates to security technology areas in underground engineering more particularly to a kind of underground engineering country rock substep smashed to pieces to infuse
Starch reinforcement means.
Background technique
The problem of continually developing and utilizing with the underground space, underground engineering is faced with big crustal stress and rock crusher,
Especially country rock of the underground engineering across complex geological conditions such as tomography, old dead zones, the stabilization of country rock smashed to pieces to underground engineering
Property generate important harm.
Currently used surrounding rock consolidation method smashed to pieces is anchor pole (rope) and grouting and reinforcing, is had the following deficiencies: traditional
There is sky after that there are cement grout setting times is long for slip casting, early strength is low, slurries are easy isolation and precipitating and injection solidification
The problem of gap, can not effectively reinforce country rock smashed to pieces；Since the integrity and stability of country rock smashed to pieces is poor, injection anchor
Occurs bit freezing phenomenon when bar (rope) hole, anchor pole (rope) can not reinforce country rock smashed to pieces；When using anchor pole (rope) supporting, by
Too small in Anchor Agent and country rock cohesive strength smashed to pieces, anchor force not can guarantee, and the mechanical property of anchor pole (rope) is unable to get sufficiently
It plays；Wall-rock crack development smashed to pieces is easy to produce spillage phenomenon after cement grout injection country rock using conventional grouting and reinforcing,
Country rock smashed to pieces can not effectively be reinforced.
Summary of the invention
The present invention mainly solve the prior art in the presence of the technical issues of, thus provide it is a kind of reinforce quickly and effectively,
The good underground engineering of stability country rock substep grouting strengthening method smashed to pieces.
Above-mentioned technical problem of the invention is mainly to be addressed by following technical proposals:
Underground engineering country rock substep grouting strengthening method smashed to pieces provided by the invention comprising following steps:
S1, grouting and reinforcing is carried out to superficial part country rock smashed to pieces；
S2, grouting and reinforcing is carried out to middle part country rock smashed to pieces by middle part grouting cable anchor；
S3, pull-out test is carried out to the middle part grouting cable anchor, judges whether pulling capacity reaches setting range, if so,
Step S4 is executed, if it is not, thening follow the steps S5；
S4, grouting and reinforcing is carried out to deep country rock smashed to pieces；
S5, the adjustment middle part grouting cable anchor supporting parameter.
Further, the step S1 is specifically included:, will be chemical in the hollow grouted anchor bar of superficial part country rock injection smashed to pieces
Slurries are injected into superficial part country rock smashed to pieces through grouted anchor bar and are reinforced.
Further, the chemical grout includes the mixed liquor of waterglass and Ma Lisan.
Further, the step S2 is specifically included: the grouting cable anchor in the middle part of the country rock injection smashed to pieces of middle part, passes through middle part
Grouting cable anchor will be reinforced in the country rock smashed to pieces of cement grout injection middle part.
Further, the step S4 is specifically included:
Deep grouting cable anchor end is utilized anchoring by the injection deep grouting cable anchor on the country rock smashed to pieces of the deep
Agent is anchored；
Prestressing force is applied to the deep grouting cable anchor；
Cement injection slurries carry out grouting and reinforcing to deep wall rock.
Further, early strength agent and micro-expanding agent are added in the cement grout.
The beneficial effects of the present invention are: the country rock smashed to pieces in underground engineering quickly, effectively reinforce；Make superficial part
Country rock rapid condensation smashed to pieces is integral, improves country rock globality, efficiently solves country rock collapse hole and bit freezing phenomenon；Make middle part and
Deep country rock smashed to pieces enhances self-bearing capacity, improves country rock preliminary bracing intensity, improves coffer mechanics smashed to pieces
It can and control its deformation and destroy.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is underground engineering of the invention country rock substep grouting strengthening method flow chart smashed to pieces；
Fig. 2 is the state diagram that superficial part of the invention country rock smashed to pieces carries out grouting and reinforcing；
Fig. 3 is the state diagram that middle part of the invention country rock smashed to pieces carries out grouting and reinforcing；
Fig. 4 is the state diagram that deep of the invention country rock smashed to pieces carries out grouting and reinforcing.
Specific embodiment
The preferred embodiment of the present invention is described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Refering to fig. 1 shown in -4, underground engineering of the invention country rock substep grouting strengthening method smashed to pieces comprising following step
It is rapid:
S1, grouting and reinforcing is carried out to superficial part country rock smashed to pieces 1；
S2, grouting and reinforcing is carried out by 4 pairs of middle part country rocks 2 smashed to pieces of middle part grouting cable anchor；
S3, pull-out test is carried out to middle part grouting cable anchor 4, judges whether pulling capacity reaches setting range, if so, executing
Step S4, if it is not, thening follow the steps S5；
S4, grouting and reinforcing is carried out to deep country rock smashed to pieces 3；
S5, adjustment middle part 4 supporting parameter of grouting cable anchor.Supporting parameter of the invention includes increasing middle part grouting cable anchor 4
Diameter, length etc..
Step S1 of the invention is specifically included: in the hollow grouted anchor bar 5 of superficial part 1 injection of country rock smashed to pieces, by chemical pulp
Liquid is injected into superficial part country rock 1 smashed to pieces through grouted anchor bar 5 and is reinforced.In the present invention, chemical grout includes waterglass and horse
Beautiful scattered mixed liquor, in other embodiments of the invention, chemical grout may be other mixed liquors.Pass through chemical grout
Front country rock 1 smashed to pieces can be frozen into an entirety by quick freezing action, enhanced rock integrity, be can effectively solve the problem that
The phenomenon that collapse hole and bit freezing, and prevent from occurring spillage when the country rock smashed to pieces of subsequent cement grout injection middle part, deep and dropping down slurry
Problem.
Step S2 of the invention is specifically included: the grouting cable anchor 4 in the middle part of 2 injection of country rock smashed to pieces of middle part is infused by middle part
Slurry anchor cable 4 will be reinforced in the country rock 2 smashed to pieces of cement grout injection middle part, can make superficial part country rock smashed to pieces, middle part in this way
Country rock smashed to pieces is frozen into an entirety, to further enhance the integrality of country rock.
And step S4 is specifically included:
The injection deep grouting cable anchor 6 on the country rock 3 smashed to pieces of deep, by 6 end of deep grouting cable anchor using Anchor Agent 7 into
Row anchoring；Prestressing force is applied to deep grouting cable anchor 6；Cement injection slurries carry out grouting and reinforcing to deep wall rock.It in this way can be with
Superficial part country rock 1 smashed to pieces, middle part country rock 2 smashed to pieces and deep country rock 3 smashed to pieces is set to form an entirety, to realize slip casting anchor
Bar (rope) to the active support of country rock smashed to pieces, meanwhile, the load of superficial part country rock 1 smashed to pieces can also pass through grouted anchor bar (rope)
It is transmitted to deep country rock 3 smashed to pieces, the self-stable ability of deep country rock 3 smashed to pieces is made to be not fully exerted.
It also added early strength agent and micro-expanding agent in cement grout of the invention, can make cement grout when shorter in this way
It is interior that there is higher-strength, and volume expands the gap for filling up country rock smashed to pieces after solidification, and it is anti-to have can solve cement
The problem of answering overlong time and volume contraction.
In conclusion the present invention can carry out the country rock smashed to pieces in underground engineering quickly, effectively to reinforce；Keep superficial part extremely broken
Broken country rock rapid condensation is integral, improves country rock globality, efficiently solves country rock collapse hole and bit freezing phenomenon；Make middle part and deep
Country rock smashed to pieces enhances self-bearing capacity, improves country rock preliminary bracing intensity, improves coffer mechanics performance smashed to pieces simultaneously
It controls its deformation and destroys.
More than, only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, it is any without
The change or replacement that creative work is expected are crossed, should be covered by the protection scope of the present invention.Therefore, protection of the invention
Range should be determined by the scope of protection defined in the claims.
Claims (6)
1. a kind of underground engineering country rock substep grouting strengthening method smashed to pieces, which comprises the following steps:
S1, grouting and reinforcing is carried out to superficial part country rock smashed to pieces；
S2, grouting and reinforcing is carried out to middle part country rock smashed to pieces by middle part grouting cable anchor；
S3, pull-out test is carried out to the middle part grouting cable anchor, judges whether pulling capacity reaches setting range, if so, executing
Step S4, if it is not, thening follow the steps S5；
S4, grouting and reinforcing is carried out to deep country rock smashed to pieces；
S5, the adjustment middle part grouting cable anchor supporting parameter.
2. underground engineering country rock substep grouting strengthening method smashed to pieces as described in claim 1, which is characterized in that the step
S1 is specifically included: in the hollow grouted anchor bar of superficial part country rock injection smashed to pieces, chemical grout being injected into superficial part through grouted anchor bar
It is reinforced in country rock smashed to pieces.
3. underground engineering country rock substep grouting strengthening method smashed to pieces as claimed in claim 2, which is characterized in that the chemistry
Slurries include the mixed liquor of waterglass and Ma Lisan.
4. underground engineering country rock substep grouting strengthening method smashed to pieces as described in claim 1, which is characterized in that the step
S2 is specifically included: the grouting cable anchor in the middle part of the country rock injection smashed to pieces of middle part, by middle part grouting cable anchor is injected cement grout
It is reinforced in portion's country rock smashed to pieces.
5. underground engineering country rock substep grouting strengthening method smashed to pieces as described in claim 1, which is characterized in that the step
S4 is specifically included:
The injection deep grouting cable anchor on the country rock smashed to pieces of the deep, by deep grouting cable anchor end using Anchor Agent into
Row anchoring；
Prestressing force is applied to the deep grouting cable anchor；
Cement injection slurries carry out grouting and reinforcing to deep wall rock.
6. underground engineering country rock substep grouting strengthening method smashed to pieces as described in claim 4 or 5, which is characterized in that described
Early strength agent and micro-expanding agent are added in cement grout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910224615.5A CN110017152B (en) | 2019-03-23 | 2019-03-23 | Underground engineering extremely-broken surrounding rock stepped grouting reinforcement method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910224615.5A CN110017152B (en) | 2019-03-23 | 2019-03-23 | Underground engineering extremely-broken surrounding rock stepped grouting reinforcement method |
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| CN110017152A true CN110017152A (en) | 2019-07-16 |
| CN110017152B CN110017152B (en) | 2021-08-31 |
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ID=67189871
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910224615.5A Active CN110017152B (en) | 2019-03-23 | 2019-03-23 | Underground engineering extremely-broken surrounding rock stepped grouting reinforcement method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486067A (en) * | 2019-09-09 | 2019-11-22 | 中交路桥建设有限公司 | A kind of gas tunnel system anchor bolt and the safe construction method of anchor pole detection |
| CN110736430A (en) * | 2019-10-16 | 2020-01-31 | 中国矿业大学(北京) | Fiber grating displacement meter installation and protection method suitable for deep underground engineering |
| CN110985058A (en) * | 2019-12-26 | 2020-04-10 | 安徽理工大学 | Grouting reinforcement method for fault fracture zone of coal face |
| CN112554910A (en) * | 2020-12-04 | 2021-03-26 | 中煤科工开采研究院有限公司 | Grouting reinforcement method for roadway impacted by dynamic load |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486067A (en) * | 2019-09-09 | 2019-11-22 | 中交路桥建设有限公司 | A kind of gas tunnel system anchor bolt and the safe construction method of anchor pole detection |
| CN110736430A (en) * | 2019-10-16 | 2020-01-31 | 中国矿业大学(北京) | Fiber grating displacement meter installation and protection method suitable for deep underground engineering |
| CN110736430B (en) * | 2019-10-16 | 2021-06-22 | 中国矿业大学(北京) | Fiber grating displacement meter installation and protection method suitable for deep underground engineering |
| CN110985058A (en) * | 2019-12-26 | 2020-04-10 | 安徽理工大学 | Grouting reinforcement method for fault fracture zone of coal face |
| CN112554910A (en) * | 2020-12-04 | 2021-03-26 | 中煤科工开采研究院有限公司 | Grouting reinforcement method for roadway impacted by dynamic load |
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