CN111594223A - Yielding structure capable of absorbing aging deformation of anchoring body and supporting method thereof - Google Patents
Yielding structure capable of absorbing aging deformation of anchoring body and supporting method thereof Download PDFInfo
- Publication number
- CN111594223A CN111594223A CN202010532833.8A CN202010532833A CN111594223A CN 111594223 A CN111594223 A CN 111594223A CN 202010532833 A CN202010532833 A CN 202010532833A CN 111594223 A CN111594223 A CN 111594223A
- Authority
- CN
- China
- Prior art keywords
- yielding
- deformation
- lining
- pressure
- absorbing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000032683 aging Effects 0.000 title claims abstract description 19
- 238000004873 anchoring Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000011435 rock Substances 0.000 claims abstract description 51
- 230000035882 stress Effects 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000004567 concrete Substances 0.000 claims description 4
- 239000011381 foam concrete Substances 0.000 claims description 3
- 238000011835 investigation Methods 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 9
- 238000005520 cutting process Methods 0.000 abstract description 8
- 230000007774 longterm Effects 0.000 abstract description 6
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000003825 pressing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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 OR ROCK 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 OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-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
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)
- Architecture (AREA)
- Civil Engineering (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a yielding structure capable of absorbing the aging deformation of an anchoring body, which comprises a primary supporting and lining structure; be provided with between once strutting and the lining cutting structure and let the pressure structure, let the deformation pressure of pressure structure absorption tunnel country rock, alleviate and adjust supporting construction's stress state, make supporting construction's atress more even, increase the security of lining cutting structure, can select suitable material according to the engineering needs, for the lining cutting structure commonly used, let and press the structural material lighter, can absorb the long-term ageing deformation performance of deformation in-process of country rock, can undertake partial confined pressure and deformation, can combine to let and press the stock use, fully embody it and let and press the support theory, long-term stability and the safe operation to burying soft rock tunnel deeply have the significance.
Description
Technical Field
The invention relates to geotechnical engineering anchoring and geological disaster prevention and control, in particular to a yielding structure capable of absorbing the aging deformation of an anchoring body and a supporting method thereof.
Background
With the development of engineering construction, the construction is increasingly challenging. For example, the construction of a deeply-buried soft rock tunnel faces the problems of large deformation and high ground stress of surrounding rocks, the control of the aging deformation of the soft rock is a problem which needs to be solved in the supporting process, the secondary supporting time of a soft rock cavern is too early, the stress release of the surrounding rocks is small, the requirement on the supporting of rock mass is high, the secondary supporting time is too late, the deformation of the cavern is too large, and the normal use of the cavern is influenced.
In order to effectively control the large deformation of the soft rock tunnel, the high-strength yielding anchor rod which can adapt to a larger shape is a means which can effectively solve the problem of large deformation of the soft rock extrusion property. The support principle of the yielding anchor rod is that surrounding rock is extruded in the deformation process of the surrounding rock to form a pressure-bearing arch, and the self-bearing function of the surrounding rock is utilized; meanwhile, in the yielding process, the surrounding rock load equal to the bolting force of the anchor rod is transmitted to the deep part of the rock body, the suspension effect of the yielding anchor rod is exerted, and the supporting force of the deep rock body is adjusted. After the surrounding rock deformation reaches a certain degree, the yielding anchor rod is mainly supported, and higher supporting pressure is favorable for restraining the deformation of the surrounding rock and stabilizing the surrounding rock.
Traditional pressure stock of letting, the later stage can't provide higher supporting power, can only stabilize the country rock under the country rock load reduces to letting the power, has only realized the supporting theory that "the limit lets". The utilization lets presses the stock, can lock the body of rod after certain volume of letting press, utilizes the body of rod to draw the stage, really realizes the support thought of "gentle then just" earlier.
The traditional yielding anchor rod keeps the pressure constant, and in order to ensure that surrounding rocks can be effectively stabilized finally, the yielding pressure is generally higher; and let and press the stock later stage and strut can increase by a wide margin, so let the pressure only need be greater than the lower limit value can, the country rock deformation initial stage, suitable let the pressure be favorable to fully releasing the country rock deformation, the country rock deformation later stage, high supporting power effectively retrains the country rock, really realize letting press stock "side branch let, the first gentle back just" support the theory, reduce the country rock shape volume, be favorable to the long-term stability of tunnel.
The existing yielding support mode still has the problems, such as neglecting the strength aging weakening of the surrounding rock caused by the rheology of the soft rock.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a yielding structure capable of absorbing the aging deformation of an anchoring body, which can relieve the pressure of a lining structure and absorb the deformation performance generated by long-term aging deformation of surrounding rocks by bearing part of surrounding pressure and deformation.
The technical scheme is as follows: the yielding structure capable of absorbing the aging deformation of the anchoring body comprises a primary support, a yielding structure and a lining structure; be provided with between primary support and the lining cutting structure and let the pressure structure, let the pressure structure and absorb the deformation pressure of tunnel country rock, alleviate and adjust supporting construction's stress state, make supporting construction's atress more even, increase lining cutting structure's security.
Further, the yielding structure is made of polyurethane or other foam concrete.
Further, the primary support is formed by hanging reinforcing mesh and spraying concrete, and after the primary support is formed, a hollow grouting anchor rod or a yielding anchor rod can be installed in the primary support.
Further, the lining structure is a flat pressing lining or a pressure bearing lining.
The technical scheme is as follows: the invention relates to a support method of a yielding structure capable of absorbing the aging deformation energy of an anchoring body, which comprises the following steps:
(1) designing the section size of the tunnel according to engineering investigation data and surrounding rock grades;
(2) determining the stress redistribution condition of the surrounding rock, and determining a primary supporting scheme according to the specification or engineering analogy;
(3) determining surrounding rock pressure which can be borne by the primary supporting and yielding structure;
(4) determining the material and the thickness of the yielding structure;
(5) and determining a supporting scheme of the lining structure.
Has the advantages that: the invention has simple structure and lower production and manufacturing cost, can select proper yielding structural materials according to the actual engineering requirements, has lighter yielding structural materials compared with the common lining structure, can absorb the denaturation performance of the surrounding rock in the long-term aging deformation process, can bear part of surrounding pressure and deformation, and is applied as a yielding structure on the basis of primary support, so that the yielding structure and the yielding anchor rod are combined for use, the yielding support concept is fully embodied, the yielding effect is enhanced, and the invention has important significance for the long-term stability and safe operation of a deeply-buried soft rock tunnel.
Drawings
FIG. 1 is a schematic view of the overall structure of the bonded wall rock of the present invention.
Detailed Description
As shown in figure 1, the yielding structure capable of absorbing the aging deformation energy of the anchoring body comprises a primary supporting structure, a yielding structure and a lining structure; be provided with between primary support and the lining cutting structure and let the pressure structure, let the pressure structure and absorb the deformation pressure of tunnel country rock, alleviate and adjust supporting construction's stress state, make supporting construction's atress more even, increase lining cutting structure's security.
First, primary support is performed. Firstly, hanging a reinforcing mesh and spraying concrete on a side top arch of the tunnel; then after primary support is finished, arranging system anchor rods, wherein a hollow grouting anchor rod is adopted in a general hole section, and a yielding anchor rod is adopted in a serious or extremely serious extrusion deformation hole section; secondly, arranging a steel support, and paving a plain concrete cushion layer on the bottom plate; and finally, arranging a drain hole, and reserving deformation according to the condition of the surrounding rock.
And after the primary supporting structure is constructed, constructing a layer of yielding structure on the basis of the primary supporting structure. Let the pressure structure material for using polyurethane or other foam concrete, the structure of stepping down of its nature of different materials, density is different, the structure of stepping down that corresponds has different intensity and compressibility, let the pressure structure bear the deformation and the pressure of country rock earlier, along with the increase of country rock pressure and deformation, let the pressure structure atress compression reach ultimate strength, the pressure that lets the pressure structure bear begins to the lining structure transmission, the flexible supporting ability of the structure of stepping down has been reflected, fully show the effect of stepping down of this structure in strutting. Let and press the structure to be located between primary support structure and lining cutting structure
And after the yielding structure is constructed, laying a lining structure along the section of the tunnel. The lining structure is a flat pressing lining or a pressure bearing lining, the flat pressing lining is a lining of a flat pressing hole, and high external water pressure is mainly balanced, so that the lining structure technology is achieved; the pressure-bearing lining is a closed lining, and is mainly suitable for a tunnel section with special requirements on stratum, water quality, environment and the like so as to meet the requirements on water delivery quality and environment.
A method for supporting a yielding structure capable of absorbing the aging deformation of an anchoring body takes soft rock tunnel support as an example, and comprises the following steps:
(1) designing the section size of the tunnel according to engineering investigation data and surrounding rock grades;
(2) determining the stress redistribution condition of the surrounding rock, and determining a primary supporting scheme according to the specification or engineering analogy;
(3) determining surrounding rock pressure which can be borne by the primary supporting and yielding structure;
(4) determining the material and the thickness of the yielding structure;
(5) and determining a supporting scheme of the lining structure.
(6) The yielding structure is tested and verified before actual engineering application, and the yielding structure is put into use after the test is qualified.
Claims (5)
1. A yielding structure capable of absorbing the aging deformation of an anchoring body comprises a primary supporting and lining structure; the tunnel wall rock stress relieving and lining structure is characterized in that a pressure relieving structure is arranged between the primary support and the lining structure, the pressure relieving structure absorbs the deformation pressure of tunnel wall rock, the stress state of the support structure is relieved and adjusted, the stress of the support structure is more uniform, and the safety of the lining structure is improved.
2. The yielding structure capable of absorbing the aging deformation energy of the anchoring body as claimed in claim 1, wherein the yielding structure is made of polyurethane or other foam concrete.
3. The yielding structure capable of absorbing the aging deformation of the anchoring body as claimed in claim 1, wherein the primary support is formed by hanging steel mesh and spraying concrete, and after the primary support is formed, a hollow grouting anchor rod or a yielding anchor rod can be installed in the primary support.
4. The yielding structure capable of absorbing the aging deformation of the anchoring body as claimed in claim 1, wherein the lining structure is a flat lining or a pressure lining.
5. The method for supporting the yielding structure capable of absorbing the aging deformation of the anchoring body according to any one of claims 1 to 4, wherein the method comprises the following steps:
(1) designing the section size of the tunnel according to engineering investigation data and surrounding rock grades;
(2) determining the stress redistribution condition of the surrounding rock, and determining a primary supporting scheme according to the specification or engineering analogy;
(3) determining surrounding rock pressure which can be borne by the primary supporting and yielding structure;
(4) determining the material and the thickness of the yielding structure;
(5) and determining a supporting scheme of the lining structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010532833.8A CN111594223A (en) | 2020-06-12 | 2020-06-12 | Yielding structure capable of absorbing aging deformation of anchoring body and supporting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010532833.8A CN111594223A (en) | 2020-06-12 | 2020-06-12 | Yielding structure capable of absorbing aging deformation of anchoring body and supporting method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111594223A true CN111594223A (en) | 2020-08-28 |
Family
ID=72179672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010532833.8A Pending CN111594223A (en) | 2020-06-12 | 2020-06-12 | Yielding structure capable of absorbing aging deformation of anchoring body and supporting method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111594223A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187506A (en) * | 2021-04-30 | 2021-07-30 | 浙江省工程勘察设计院集团有限公司 | Yielding support structure and method for measuring pressure and deformation of surrounding rock |
| CN114738021A (en) * | 2022-03-29 | 2022-07-12 | 盾构及掘进技术国家重点实验室 | Large-deformation short anchor yielding supporting structure and method for high-ground-stress soft rock tunnel |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002256708A (en) * | 2001-02-27 | 2002-09-11 | Haneda Concrete Industrial Co Ltd | Reinforcing structure for concrete construction |
| CN201953384U (en) * | 2011-01-14 | 2011-08-31 | 西安科技大学 | Device for supporting soft rock roadway with high geostress |
| CN102536282A (en) * | 2012-02-27 | 2012-07-04 | 西安科技大学 | Method for preventing and controlling bottom heaving disaster of mine stoping tunnel |
| CN204511455U (en) * | 2015-03-31 | 2015-07-29 | 山东科技大学 | Deep weak surrounding rock Double-casing coupling yield supporting system |
| CN204511463U (en) * | 2015-03-31 | 2015-07-29 | 山东科技大学 | The two spray anchor combined type supporting and protection structure of country rock smashed to pieces |
| CN104847374A (en) * | 2015-04-24 | 2015-08-19 | 长安大学 | Soft rock large-deformation tunnel supporting system and construction method thereof |
| CN105937399A (en) * | 2016-05-31 | 2016-09-14 | 中国科学院武汉岩土力学研究所 | Coordination deformation support system suitable for soft-rock large-deformation tunnel, and support method of support system |
| CN206418618U (en) * | 2016-11-25 | 2017-08-18 | 中国人民解放军61489部队 | A kind of protection works antiknock damping three-layer composite structure with crushable backpacking |
| CN207111104U (en) * | 2017-06-28 | 2018-03-16 | 中交基础设施养护集团有限公司 | A kind of big cross section pole Support System in Soft Rock Tunnels tunneling boring yield supporting structure |
| CN108019222A (en) * | 2017-11-20 | 2018-05-11 | 三峡大学 | A kind of tunnel lining structure filled using haydite and construction method |
| CN109595003A (en) * | 2019-01-24 | 2019-04-09 | 三峡大学 | A kind of big section of tunnel is backbreak liner supporting and autonomous pressure relief device and construction method |
| CN110094215A (en) * | 2019-05-30 | 2019-08-06 | 三峡大学 | Non-newtonian fluid liner supporting structure and construction method |
| CN210483744U (en) * | 2019-05-22 | 2020-05-08 | 同济大学 | Self-adaptation composite lining structure suitable for large deformation soft rock tunnel |
-
2020
- 2020-06-12 CN CN202010532833.8A patent/CN111594223A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002256708A (en) * | 2001-02-27 | 2002-09-11 | Haneda Concrete Industrial Co Ltd | Reinforcing structure for concrete construction |
| CN201953384U (en) * | 2011-01-14 | 2011-08-31 | 西安科技大学 | Device for supporting soft rock roadway with high geostress |
| CN102536282A (en) * | 2012-02-27 | 2012-07-04 | 西安科技大学 | Method for preventing and controlling bottom heaving disaster of mine stoping tunnel |
| CN204511455U (en) * | 2015-03-31 | 2015-07-29 | 山东科技大学 | Deep weak surrounding rock Double-casing coupling yield supporting system |
| CN204511463U (en) * | 2015-03-31 | 2015-07-29 | 山东科技大学 | The two spray anchor combined type supporting and protection structure of country rock smashed to pieces |
| CN104847374A (en) * | 2015-04-24 | 2015-08-19 | 长安大学 | Soft rock large-deformation tunnel supporting system and construction method thereof |
| CN105937399A (en) * | 2016-05-31 | 2016-09-14 | 中国科学院武汉岩土力学研究所 | Coordination deformation support system suitable for soft-rock large-deformation tunnel, and support method of support system |
| CN206418618U (en) * | 2016-11-25 | 2017-08-18 | 中国人民解放军61489部队 | A kind of protection works antiknock damping three-layer composite structure with crushable backpacking |
| CN207111104U (en) * | 2017-06-28 | 2018-03-16 | 中交基础设施养护集团有限公司 | A kind of big cross section pole Support System in Soft Rock Tunnels tunneling boring yield supporting structure |
| CN108019222A (en) * | 2017-11-20 | 2018-05-11 | 三峡大学 | A kind of tunnel lining structure filled using haydite and construction method |
| CN109595003A (en) * | 2019-01-24 | 2019-04-09 | 三峡大学 | A kind of big section of tunnel is backbreak liner supporting and autonomous pressure relief device and construction method |
| CN210483744U (en) * | 2019-05-22 | 2020-05-08 | 同济大学 | Self-adaptation composite lining structure suitable for large deformation soft rock tunnel |
| CN110094215A (en) * | 2019-05-30 | 2019-08-06 | 三峡大学 | Non-newtonian fluid liner supporting structure and construction method |
Non-Patent Citations (2)
| Title |
|---|
| 刘伟韬: "《矿井水害与防治》", 29 February 2016, 煤炭工业出版社 * |
| 田云等: "考虑软岩强度时效弱化的缓冲层让压支护设计研究", 《岩土力学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187506A (en) * | 2021-04-30 | 2021-07-30 | 浙江省工程勘察设计院集团有限公司 | Yielding support structure and method for measuring pressure and deformation of surrounding rock |
| CN114738021A (en) * | 2022-03-29 | 2022-07-12 | 盾构及掘进技术国家重点实验室 | Large-deformation short anchor yielding supporting structure and method for high-ground-stress soft rock tunnel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111594223A (en) | Yielding structure capable of absorbing aging deformation of anchoring body and supporting method thereof | |
| CN103485796B (en) | Tunnel supporting structure across active fault | |
| Sui et al. | State of the art review of the large deformation rock bolts | |
| CN108442569A (en) | A kind of recoverable function energy consumption reinforced concrete shear wall and its method of construction | |
| CN205370580U (en) | Deep is moved by force and is carried tunnel scour protection resistance to compression supporting construction | |
| CN111425231B (en) | Long and short anchor cable coordinated energy absorption yielding device and construction method | |
| CN113217053A (en) | Self-adaptive large-deformation prestressed anchor rod | |
| KANG et al. | Research progress on support technology and methods for soft rock with large deformation hazards in China | |
| Chen et al. | Effect of stress paths on failure mechanism and progressive damage of hard-brittle rock | |
| CN106499240B (en) | Telescopic anti-buckling support with multistage buckling strength and positioning metal rubber energy consumption ring | |
| CN208153054U (en) | A kind of filling bag body and supporting packed column | |
| Xiao et al. | Experimental study of an inflatable recyclable anchor | |
| CN111424700B (en) | BFRP-spiral sleeve valve type composite anchoring system for high-intensity earthquake region and construction method thereof | |
| CN117307219A (en) | Application method of multidimensional pressure-applying anchoring supporting structure | |
| CN101413294A (en) | Construction method of damage-reduction shear-slip basic damping structure | |
| CN102392662A (en) | Bent dynamic and static combined anchor rod | |
| CN113153363B (en) | Tunnel flexible supporting structure under high ground stress | |
| CN102337914A (en) | Welding type anchor rod with dynamic and static combination | |
| CN103046934A (en) | Method retaining and protecting soft surrounding rock roadways by placing hole pressure relief materials | |
| CN213980822U (en) | U-shaped support device for roadway | |
| CN202280468U (en) | Welded-type dynamic and static combined anchor rod | |
| CN113931670A (en) | Combined grouting prestress large-deformation anchor rod and construction method thereof | |
| CN204984456U (en) | Slip casting stock is pressed to multiple letting | |
| CN202284476U (en) | Curved anchor rod with static and dynamic combined function | |
| CN114320410A (en) | Deep tunnel resistance to plucking slip casting stock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200828 |
|
| RJ01 | Rejection of invention patent application after publication |