CN104236943B - Model test method for obtaining characteristic curve of whole surrounding rock-supporting process - Google Patents
Model test method for obtaining characteristic curve of whole surrounding rock-supporting process Download PDFInfo
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- CN104236943B CN104236943B CN201410456998.6A CN201410456998A CN104236943B CN 104236943 B CN104236943 B CN 104236943B CN 201410456998 A CN201410456998 A CN 201410456998A CN 104236943 B CN104236943 B CN 104236943B
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- supporting
- model test
- surrounding rock
- test method
- characteristic curve
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Abstract
The invention discloses a model test method for obtaining a characteristic curve of the whole surrounding rock-supporting process. According to the model test method for obtaining the characteristic curve of the whole surrounding rock-supporting process, by means of a supporting structure which is similar to a spring and is formed by winding an aluminum alloy sheet around a central cylinder, the tension degree is adjusted gradually, namely supporting deformation is changed continuously multiple times, the corresponding deformation values and the corresponding surrounding rock pressure values are measured and read respectively, in this way, the characteristic curve of the whole surrounding rock-supporting process is obtained in a one-time mode through one model test, and particularly the post-peak effect section can be simulated. Compared with a traditional model test according to which a model test is conducted under multiple working conditions by manufacturing multiple groups of gypsum supporting structures with different sizes, the model test method for obtaining the characteristic curve of the whole surrounding rock-supporting process has the advantages that labor, time and money are saved, cost of similar tests is greatly reduced, and efficiency of the similar tests is improved; in addition, the defect that according to traditional test methods, the post-peak effect section can not be simulated is overcome.
Description
Technical field
The present invention relates to tunnel model test field, particularly to tunnel surrounding-supporting indicatrix model test aspect.
Background technology
Characteristic curve method is one of 4 kinds of structure design of tunnel models that International Tunnelling Association (ITA) concludes.Country rock-supporting
Indicatrix is significant for determination supporting time and support rigidity.Model test method is to determine that country rock-supporting is special
Levy one of important method of curve.Conventional way is to make multigroup various sizes of gypsum lining model, firm to reach supporting
Spend different purposes, by carrying out multi-state model test, obtain the different pressure from surrounding rock of different support rigidity correspondences.This just makes
Become time-consuming, taken a lot of work, expensive, and due to super large deflection can not be simulated and helpless to peak aftereffect section.
Content of the invention
In view of the above deficiency of prior art, the purpose of the present invention be model test i.e. disposable obtain country rock-
Supporting overall process indicatrix, especially peak aftereffect section, reduce such experimentation cost, improve such test efficiency.
The purpose of the present invention is to be realized by following means.
A kind of model test method for obtaining country rock-supporting overall process indicatrix, that is, in model casing, setting can
The continuous supporting mechanism 130 changing support action power, disposably obtains country rock-supporting overall process by the continuous Support Deformation that changes
Indicatrix, especially peak aftereffect section, its concrete steps includes：
1) 100 put into supporting mechanism 130 in model casing, insert iron wire with well from earth's surface and direct reach vault lining cutting, lead to
Cross dial gauge to read iron wire displacement to survey Vault settlement；It is subsequently adding ground and fill out lid to experiment condition；The appearance of supporting mechanism 130
Face setting is provided with tonometric pressure cell 200；
2) gradually discharge the supporting power of supporting mechanism 130, and pressure from surrounding rock value is obtained by pressure cell 200；Adjustment supporting
The elastic state of mechanism 130 is that continuous several times change Support Deformation, surveys respectively and reads corresponding deformation values, pressure from surrounding rock value, thus
In an i.e. disposable acquisition country rock-supporting overall process indicatrix, especially peak aftereffect section of model test.
The inventive method continuously can adjust Support Deformation during a model test, and adjustable range is big, once
Property obtain country rock-supporting overall process indicatrix, saving of labor, save time, save money, greatly reduce such experimentation cost, improve this
Class test efficiency.
Brief description
Fig. 1 is model casing schematic diagram of the present invention.
Fig. 2 is the A-A sectional view (after installing supporting and measurement equipment) of Fig. 1.
Specific embodiment
(taking test arch crown part pressure from surrounding rock and the relation curve of deformation as a example) is to this with reference to the accompanying drawings and examples
Invention is described further.
(1) aluminum alloy materials of suitable thickness are selected according to rigidity requirement, and according to studied tunnel cross-section form and mould
Molded dimension, selects aluminium alloy sheet and center drum size, as illustrated, 130 is supporting mechanism, 100 is model casing, and 110 are
Model casing periphery strengthens gusset.120 is " clockwork spring " supporting mechanism 130 installation passage, and during experiment, supporting mechanism 130 passes through to install and leads to
Road is inserted in model casing.For convenience of operating, weld wind in the center drum 140 of " clockwork spring " supporting mechanism 130 lining cutting, and increase
Plus rolling bearing system.
(2) " clockwork spring " lining cutting is installed to test model case, and in arch crown part embedment pressure box, due to lining cutting and pressure
There is relative slip between box, therefore in advance in the outer surface coating lubricating oil of " clockwork spring " lining cutting；For surveying Vault settlement, insert from earth's surface
Enter iron wire with well and direct reach vault lining cutting, iron wire displacement is read by dial gauge, actual tests model is as shown in Figure 2.
(3) according to experimental design scheme, select the elastic state of several " clockwork spring " lining cutting, such as tighten 1/2 at " clockwork spring "
Circle, 1 circle, 3/2 circle, 2 circles, 5/2 circle test reading respectively.Pass through turning handle during practical operation, and locked with bayonet lock.Treat pressure
After box and dial gauge data stabilization, record this data.With this in the same manner, record the multi-group data of " clockwork spring " different elastic state.This
Data can be used for drawing country rock-supporting indicatrix.
Claims (3)
1. a kind of model test method for obtaining country rock-supporting overall process indicatrix, arranges in model casing and can connect
The supporting mechanism (130) of continuous change support action power, disposably obtains country rock-supporting overall process by the continuous Support Deformation that changes
Indicatrix, its concrete steps includes：
1) put into supporting mechanism (130) in model casing (100), insert iron wire with well from earth's surface and direct reach vault lining cutting, lead to
Cross dial gauge to read iron wire displacement to survey Vault settlement；It is subsequently adding ground and fill out lid to experiment condition；Outside supporting mechanism (130)
Surface setting is provided with tonometric pressure cell (200)；
2) the elastic state of gradually adjustment supporting mechanism (130), i.e. continuous several times change Support Deformation, survey respectively and read corresponding change
Shape value, pressure from surrounding rock value, thus in an i.e. disposable acquisition country rock-supporting overall process indicatrix of model test；
Described supporting mechanism (130) is clockwork spring mechanical mechanism, is made up of elastic metallic coiled material and release control mechanism.
2. the model test method for obtaining country rock-supporting overall process indicatrix according to claim 1, its feature
Be, described elastic metallic coiled material be empirically require select thickness aluminium alloy sheet, described elastic metallic coiled material roll together in
Center drum (140).
3. the model test method for obtaining country rock-supporting overall process indicatrix according to claim 2, its feature
It is, described aluminium alloy sheet width is mated with test model case size；The deflection that length produces as needed determines, deformation
Amount is bigger, and length is longer；Thickness adopts 0.2mm～1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410456998.6A CN104236943B (en) | 2014-09-10 | 2014-09-10 | Model test method for obtaining characteristic curve of whole surrounding rock-supporting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410456998.6A CN104236943B (en) | 2014-09-10 | 2014-09-10 | Model test method for obtaining characteristic curve of whole surrounding rock-supporting process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104236943A CN104236943A (en) | 2014-12-24 |
| CN104236943B true CN104236943B (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410456998.6A Expired - Fee Related CN104236943B (en) | 2014-09-10 | 2014-09-10 | Model test method for obtaining characteristic curve of whole surrounding rock-supporting process |
Country Status (1)
| Country | Link |
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| CN (1) | CN104236943B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107505449A (en) * | 2017-09-13 | 2017-12-22 | 武汉科技大学 | A kind of pipe curtain supporting construction model test apparatus |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3531283C2 (en) * | 1985-09-02 | 1988-06-09 | Dyckerhoff & Widmann Ag, 8000 Muenchen, De | |
| CN86108843A (en) * | 1986-12-22 | 1988-07-06 | 东北工学院 | The measurement method of ground response curve and probe thereof |
| CN201909739U (en) * | 2010-12-29 | 2011-07-27 | 长沙理工大学 | Arch structure test device |
| CN102621010A (en) * | 2012-04-13 | 2012-08-01 | 山东大学 | Multifunctional testing machine for deep surrounding rock anchoring performance |
| CN103076128A (en) * | 2013-01-04 | 2013-05-01 | 西南交通大学 | Tunnel three-dimensional stress field simulator |
| CN103308273A (en) * | 2013-05-28 | 2013-09-18 | 哈尔滨工程大学 | Wind load effect rigidity strength testing method of large-size sealing structure |
-
2014
- 2014-09-10 CN CN201410456998.6A patent/CN104236943B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3531283C2 (en) * | 1985-09-02 | 1988-06-09 | Dyckerhoff & Widmann Ag, 8000 Muenchen, De | |
| CN86108843A (en) * | 1986-12-22 | 1988-07-06 | 东北工学院 | The measurement method of ground response curve and probe thereof |
| CN201909739U (en) * | 2010-12-29 | 2011-07-27 | 长沙理工大学 | Arch structure test device |
| CN102621010A (en) * | 2012-04-13 | 2012-08-01 | 山东大学 | Multifunctional testing machine for deep surrounding rock anchoring performance |
| CN103076128A (en) * | 2013-01-04 | 2013-05-01 | 西南交通大学 | Tunnel three-dimensional stress field simulator |
| CN103308273A (en) * | 2013-05-28 | 2013-09-18 | 哈尔滨工程大学 | Wind load effect rigidity strength testing method of large-size sealing structure |
Non-Patent Citations (2)
| Title |
|---|
| 超大断面隧道软弱破碎围岩渐进破坏过程三维地质力学模型试验研究;李利平等;《岩石力学与工程学报》;20120331;第31卷(第3期);第550-560页 * |
| 隧道复合式衬砌初期支护极限状态模型试验研究;冯冀蒙等;《岩土力学》;20121130;第33卷(第11期);第3345-3351页 * |
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| CN104236943A (en) | 2014-12-24 |
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Granted publication date: 20170215 Termination date: 20210910 |