CN207408245U - A kind of pilot system for testing tunnel initial stage bolt-spary supports load-carrying properties - Google Patents
A kind of pilot system for testing tunnel initial stage bolt-spary supports load-carrying properties Download PDFInfo
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- CN207408245U CN207408245U CN201721532613.5U CN201721532613U CN207408245U CN 207408245 U CN207408245 U CN 207408245U CN 201721532613 U CN201721532613 U CN 201721532613U CN 207408245 U CN207408245 U CN 207408245U
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Abstract
The utility model discloses a kind of pilot systems for testing tunnel initial stage bolt-spary supports load-carrying properties, and including support device, the support device is divided into upper and lower two parts, and top is arranged with bolt-spary supports structure sheaf to be measured；Lower part is provided with poroid loading air bag, and for the bottom of the poroid loading air bag by support device, top layer is equipped with poroid elastic rubber power transmission layer；The poroid loading air bag is connected with the first power source, and that realizes the air bag fills exhaust；First power source is connected with central control system, it can be achieved that including but not limited to simple plus unloading, the Validity Test of bolt-spary supports structure sheaf load-carrying properties under cyclic load operating mode.
Description
Technical field
The utility model is related to tunnel support technical fields more particularly to one kind to hold for testing tunnel initial stage bolt-spary supports
Carry the pilot system of performance.
Background technology
Currently, with the fast development of all kinds of underground engineerings or tunnel construction scale and speed, underground engineering or tunnel pair
The security requirement of supporting construction is also higher and higher, and supporting construction should ensure the stabilization of construction period country rock, also need to simultaneously
Ensure the long-term safety problem of country rock.After underground engineering or tunnel excavation, by using gunite concrete, anchor pole and bar-mat reinforcement
The bolt-spary supports structure formed is a kind of effective preliminary bracing means that deformation controlling for rock surrounding gateways destroys, this kind of supporting belongs to flexible
One kind of supporting, it suitable for surrounding rock can be deformed to a certain extent, and can effectively transfer self, make country rock and supporting shape
Into certain self-supporting structures, the common deformation failure for resisting external country rock.Meanwhile bolt-spary supports also has construction technology letter
It is single, speed of application is fast, conformability, promptness and the advantages that separability, it is made to have been obtained in tunnel surrounding support engineering extensively
Using with popularization.
It when constructing at the scene, is influenced by tunneling Surrounding Rock Strength grade and geological conditions, bolt-spary supports structure may be selected
Single gunite concrete, anchor pole and bar-mat reinforcement are used, can also choose wherein certain several be used in combination.Therefore, shotcrete
Supporting construction is as a kind of support pattern, and there is also many kinds, such as single anchor pole, bar-mat reinforcement or injection coagulation for form
Soil, anchor pole+bar-mat reinforcement combination, anchor pole+gunite concrete combination, bar-mat reinforcement+gunite concrete combination or anchor pole+bar-mat reinforcement+spray
Penetrate Combined concrete etc..In addition, being cycled Blasting Excavation vibration influence or critical tunnel excavation disturbance effect by tunnel is influenced, shotcrete
Supporting construction will inevitably be influenced be subject to the load actions operating mode such as loop cycle load or simple plus unloading, this is also shadow
An important factor for ringing bolt-spary supports structural bearing performance.
However, Most scholars often select single injection to mix when studying bolt-spary supports structural bearing performance at present
Solidifying soil, anchor pole or bar-mat reinforcement are studied, and lack and macroscopical load-carrying properties of shotcrete supporting construction under different combination types are carried out
Further investigation.Moreover, existing routine test system, it is also difficult to realize single or different combination types bolt-spary supports structural bearing
The Validity Test of energy.
Utility model content
For under various combination Support types and different load action operating modes, bolt-spary supports structure shortage has the utility model
Imitate the deficiency of pilot system, it is proposed that a kind of pilot system for testing tunnel initial stage bolt-spary supports load-carrying properties, it can be to list
One anchor pole, bar-mat reinforcement or gunite concrete, anchor pole+bar-mat reinforcement combines, anchor pole+gunite concrete combines, bar-mat reinforcement+injection mixes
The different types bolt-spary supports structures such as solidifying local soil type closes or anchor pole+bar-mat reinforcement+gunite concrete combines carry out plus unloading test.Together
When, by central control system and each class testing sensor, it can also simulate and the different loads such as unloading, cyclic loading and unloading is added to make merely
Use operating mode.
To achieve the above object, the specific technical solution of the utility model is as follows：
A kind of pilot system for testing tunnel initial stage bolt-spary supports load-carrying properties, including support device, the branch
Support arrangement is divided into upper and lower two parts, and top is arranged with bolt-spary supports structure sheaf to be measured；Lower part is provided with poroid loading air bag,
The bottom of the poroid loading air bag is equipped with poroid elastic rubber power transmission layer by support device, top layer；The hole
Shape loading air bag is connected with the first power source, and that realizes the air bag fills exhaust；First power source and central control system
It is connected, it can be achieved that including but not limited to simple plus unloading, bolt-spary supports structure sheaf load-carrying properties under cyclic load operating mode have
Effect test.
Further, the support device includes bottom base, bottom base upper surface set gone along with sb. to guard him by F shape steel plates and
Into frame structure, F shape steel plates are equipped with the upper and lower overhanging step edge of a wing towards the inside of test device along short transverse, described
Support device is divided into upper and lower two parts by the upper and lower overhanging step edge of a wing.
Further, the bottom base uniform intervals are equipped with series of apertures, and position of opening activity sets pedestal stopple.
Further, the F shape steel plates include a steel plate being vertically arranged, which is provided with outer outward
The edge of a wing is stretched, for the connection with bottom base, is set in the middle part of the steel plate there are one the overhanging step edge of a wing along under stretching inwardly, it should
Inwardly along the upper overhanging step edge of a wing stretched there are one being set at the top of steel plate；The wherein upper overhanging step edge of a wing can be along F shape steel plates
Lower mobile setting.
Further, the form of the bolt-spary supports structure sheaf to be measured includes but not limited to single anchor pole, bar-mat reinforcement
Or gunite concrete, anchor pole+bar-mat reinforcement combination, anchor pole+gunite concrete combination, bar-mat reinforcement+gunite concrete combination and anchor pole+
Bar-mat reinforcement+gunite concrete combination.
The overhanging step edge of a wing upper table of F shape steel plate lower insides is fixed on bar-mat reinforcement periphery in bolt-spary supports structure sheaf to be measured
Face；Anchor pole sequentially passes through bar-mat reinforcement, poroid elastic rubber, poroid loading air bag and bottom base by position of opening from top to bottom
Seat, installation is fixed by anchor rod pallet board and nut in two outer end of anchor pole；Gunite concrete is uniformly injected in the upper of bar-mat reinforcement
Surface, depending on jet thickness is according to different test requirements documents.
Further, in the bolt-spary supports structure sheaf, anchor pole, bar-mat reinforcement, gunite concrete position are equipped with stress
Sensor is monitored, gunite concrete upper surface is equipped with displacement monitoring sensor and acoustic emission monitor(ing) sensor, stress prison
Sensor, displacement monitoring sensor, acoustic emission monitor(ing) sensor is surveyed with central control system to be connected.
Further, the poroid loading air bag uniform intervals are provided with series of apertures, position of opening and bottom base
Position of opening is corresponding, and poroid loading air bag is connected by air inlet and exhaust piper with the first power source, realizes filling for poroid loading air bag
Exhaust；First power source is high-pressure pump.
Further, the poroid elastic rubber is located at poroid loading air bag upper surface, between poroid elastic rubber is uniform
Every being provided with series of apertures, position of opening is corresponding with bottom base and poroid loading air bag position of opening, position of opening activity
Rubber stopple is set.
The beneficial effects of the utility model are：
1) the utility model proposes bolt-spary supports structural bearing performance test system, test object can be single anchor
Bar, bar-mat reinforcement or gunite concrete, anchor pole+bar-mat reinforcement combination, anchor pole+gunite concrete combination, bar-mat reinforcement+gunite concrete group
Conjunction or anchor pole+bar-mat reinforcement+gunite concrete combination supporting, functional, compensate for routine test device and are difficult to Validity Test
Deficiency.
2) the utility model by it is poroid loading air bag and poroid elastic rubber can realize with the face of bolt-spary supports structure sheaf-
Face contacts, it is ensured that the on-load pressure for acting on bolt-spary supports structure sheaf is more evenly distributed, and improves test accuracy.
3) the utility model can meet list by components such as poroid loading air bag, poroid elastic rubber, poroid bottom bases
The setting of root or more anchor poles.
4) it is mixed can to meet different-thickness injection by the F shape steel plates on the movable setting overhanging edge of a wing in top for the utility model
Coagulate the setting of soil.
5) the utility model can simulate simple plus unloading, Xun Huan by central control system and each class testing sensor
Add the different load action operating modes such as unloading, meet the loading characteristic of live bolt-spary supports structure.
6) combined type connection can be used in each component of this kind of pilot system of the utility model, and convenient disassembly can be according to specific
Test requirements document exchanges wherein a certain scantling, to meet different tests demand.
Description of the drawings
The accompanying drawings which form a part of this application are used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation do not form the improper restriction to the application for explaining the application.
Fig. 1 is the central section figure of the utility model embodiment support device；
Fig. 2 is the top plan view of the utility model embodiment support device；
Fig. 3 is the 3 d effect graph of the utility model embodiment bottom base；
Fig. 4 is the 3 d effect graph of the utility model embodiment F shape steel plates；
Fig. 5 is the side view of the utility model embodiment F shape steel plates；
Fig. 6 is the flow chart of the utility model embodiment test evaluation method.
Wherein：1-bottom base；2-F shape steel plates；3-poroid loading air bag；4-poroid elastic rubber；5-upper overhanging
The step edge of a wing；6-anchor pole；7-anchor rod pallet board；8-bar-mat reinforcement；9-reinforcing bar press strip；10-gunite concrete；11-high pressure gas
Pump；12-central control system；13-nut.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.It is unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
Be also intended to include plural form, additionally, it should be understood that, when in the present specification use term "comprising" or " comprising "
When, indicate existing characteristics, step, operation, device, component or combination thereof.
As background technology is introduced, deficiency exists in the prior art, the technical issues of in order to solve as above, this practicality
It is new to propose a kind of pilot system for testing tunnel initial stage bolt-spary supports load-carrying properties, it can effectively solve the above problems,
And it can realize under various combination Support types and load action operating mode, the Validity Test of bolt-spary supports structural bearing performance.
Now by taking the bolt-spary supports structure of single anchor rod as an example, its specific embodiment is illustrated as follows：
In a kind of typical embodiment of the application, as depicted in figs. 1 and 2, one kind is used for testing tunnel initial stage shotcrete
The pilot system of bearing performance of support, whole device is the signal carried out by taking rectangle as an example in Fig. 1, Fig. 2, which can set
Count elongated cylindrical or other shape；Specifically, including support device, support device is divided into upper and lower two parts, and top is arranged with
Bolt-spary supports structure sheaf to be measured；Lower part is provided with poroid loading air bag, and the bottom of the poroid loading air bag passes through support
Device supports, and top layer is equipped with poroid elastic rubber power transmission layer；The poroid loading air bag is connected with the first power source, and realizing should
Air bag fills exhaust；First power source be connected with central control system, it can be achieved that include but not limited to simple plus unloading,
The Validity Test of bolt-spary supports structure sheaf load-carrying properties under cyclic load operating mode.
The form of bolt-spary supports structure sheaf to be measured includes but not limited to single anchor pole, bar-mat reinforcement or gunite concrete, anchor
Bar+bar-mat reinforcement combination, anchor pole+gunite concrete combination, bar-mat reinforcement+gunite concrete combination and anchor pole+bar-mat reinforcement+injection coagulation
Local soil type closes.
Bar-mat reinforcement 8 it is neat be laid on poroid 4 upper surface of elastic rubber, four corners of bar-mat reinforcement 8 pass through high-strength bolt
It is fixed on reinforcing bar press strip 9 on F shape steel plates 2.
Anchor pole 6 sequentially passes through bar-mat reinforcement 8, poroid elastic rubber 4, poroid loading air bag 3 by position of opening from top to bottom
With bottom base 1, installation is fixed by anchor rod pallet board 7 and nut 13 in 6 liang of outer ends of anchor pole.
Gunite concrete 10 is uniformly injected in the upper surface of bar-mat reinforcement 8, jet thickness according to different test requirements documents and
It is fixed.
Specifically, support device includes bottom base 1, F shape steel plates 2；Bottom base 1 is located at pilot system bottom, shape
For rectangle, 1 lower surface of bottom base is peripherally arranged circumferentially vertical surface floor, to enhance the press-bending load of bottom base 1
Energy；1 uniform intervals of bottom base are equipped with series of apertures, and position of opening activity sets pedestal stopple.
F shape steel plates 2 include a vertical steel plate, and bottom base is fixed on 1 week in the overhanging edge of a wing that vertical steel plate bottom is set
At side, set that there are one inwardly there are one inwardly along the overhanging step edge of a wing under stretching, being set at the top of the steel plate in the middle part of the steel plate
The upper overhanging step edge of a wing that side edge is stretched；The wherein upper overhanging step edge of a wing 5 can freely up and down be moved along vertical steel plate 2, and pass through height
Strength bolt is fixed on F shape steel plates 2；Under the overhanging step edge of a wing and vertical steel plate be integral structure.
In bolt-spary supports structure sheaf, anchor pole 6, bar-mat reinforcement 8,10 position of gunite concrete are equipped with stress monitoring sensor,
10 upper surface of gunite concrete be equipped with displacement monitoring sensor and acoustic emission monitor(ing) sensor, the stress monitoring sensor,
Displacement monitoring sensor, acoustic emission monitor(ing) sensor are connected with central control system 12.
High-pressure pump 11 is the first power source, and the first power source is connected with central control system 12 to be unloaded, it can be achieved that adding merely
The Validity Test of the different lower shotcrete supporting construction load-carrying properties of operating modes effect such as load or cyclic load.
Poroid loading air bag 3 be located under F shape steel plates 2 the overhanging step edge of a wing and 1 upper surface of bottom base under space
Half part, poroid loading 3 uniform intervals of air bag are provided with series of apertures, and position of opening is corresponding with 1 position of opening of bottom base,
Poroid loading air bag 3 is connected by air inlet and exhaust piper with the first power source, and that realizes poroid loading air bag 3 fills exhaust.
Poroid elastic rubber 4 is located at 3 upper surface of poroid loading air bag, and poroid 4 uniform intervals of elastic rubber are opened equipped with series
Hole, position of opening is corresponding with bottom base 1 and poroid loading 3 position of opening of air bag, and position of opening activity sets rubber stopple.
A kind of above-mentioned pilot system for testing tunnel initial stage bolt-spary supports load-carrying properties, specific test method include
Following steps：
Step 1：According to test requirements document, bottom base 1 and poroid elastic rubber 4 are removed needing the position for installing anchor pole 6
The stopple of middle corresponding position, and uniformly smear one layer of lubricating cream in test device inner surface.
Step 2：The air inlet pipe being connected with poroid loading air bag 3 starts air inlet, when poroid 4 upper surface of elastic rubber and F types
When overhanging edge of a wing upper surface is concordant under steel plate 2, stop inflation, poroid loading air bag 3 is in voltage stabilizing state.
Step 3：Bar-mat reinforcement 8 is laid with along poroid 4 upper surface of elastic rubber, and bar-mat reinforcement 8 is fixed on F shape steel plates 2.
Step 4：Along poroid elastic rubber 4, poroid loading 1 position of opening of air bag 3 and bottom base, anchor pole 6, and profit are installed
It is fixed with anchor rod pallet board 7 and nut 13.
Step 5：Certain thickness gunite concrete 10 is uniformly sprayed in the upper surface of bar-mat reinforcement 8.
Step 6：It is after the completion of 10 final set of concrete to be sprayed and maintenance, the upper overhanging step edge of a wing 5 in 2 inside of F shape steel plates is tight
It is close to be fitted in 10 upper surface of gunite concrete, and be fixed.
Step 7：The air inlet pipe being connected with poroid loading air bag 3 continues to inflate, when poroid loading 3 on-load pressure of air bag reaches
Bolt-spary supports structure sheaf ultimate bearing capacity 3%~5% when, stop loading, system is again at voltage stabilizing state.
Step 8：Stepped plus unloading or cyclic loading and unloading, Zhi Daomao are carried out by the gradient that every grade of load is 5KN~10KN
Supporting construction layer cracking destruction is sprayed, stops loading.Record the test datas such as stress, the displacement in loading procedure.
Step 9：The exhaust pipe being connected with poroid loading air bag 3 starts to be vented, and the gas in poroid loading air bag 3 is whole
Discharge.
Step 10：Remove the 2 overhanging step edge of a wing 5 of inside upper part of F shape steel plates, and remove gunite concrete 10, bar-mat reinforcement 8 and
6 grade test components of anchor pole, and stopple is placed in bottom base 1 and poroid 4 tapping of elastic rubber, off-test can carry out down
One working cycles.
In addition to the bolt-spary supports structure sheaf of 6 form of this kind of single anchor rod of the utility model embodiment, if bolt-spary supports to be measured
When the form of structure sheaf combines for other types, then gunite concrete 10, bar-mat reinforcement 8 in step 1-10 in the test method
And 6 grade components of anchor pole can be set according to specific the making choice property of combining form of specific bolt-spary supports structure to be measured.
Fig. 6 lists shotcrete supporting construction load-carrying properties test evaluation analysis process figure under different combinations.Using institute
A kind of pilot system for testing tunnel initial stage bolt-spary supports load-carrying properties stated is carrying out tunnel initial-stage bolt-spary supports structure
When load-carrying properties are evaluated, comprise the following steps：
Step A：According to test objective, determine to influence each factor of bolt-spary supports structural bearing performance, according to the factor
Experience level design orthogonal test scheme.
Step B：According to the orthogonal test scheme, the examination of the testing tunnel bolt-spary supports structural bearing performance is utilized
Check system prepares corresponding bolt-spary supports structure sheaf to be measured.
Step C：Simple plus unloading or cyclic loading and unloading experiment are carried out to bolt-spary supports structure sheaf to be measured, utilizes each class testing
The monitoring data such as stress, deformation and destruction of each component during sensor record experiment.
Step D：According to bolt-spary supports structure combining form to be measured and influence factor, standard group and contrast groups are determined, and
Standard group carries out orthogonal test with the ratio of a certain load-carrying properties parameter is selected to be arranged to evaluation index in contrast groups monitoring data
The statistical analysis of data obtains influencing the conspicuousness influence factor of bolt-spary supports structural bearing performance and conspicuousness influence factor
Sphere of action.
Step E：On the conspicuousness influence factor of the influence bolt-spary supports structural bearing performance, further carry out single factor test
Or more multilevel orthogonal test under interaction of multiple factors, obtain each conspicuousness influence factor different level and one
Or the correspondence of multiple bolt-spary supports structural bearing performance indicators, corresponding matched curve or mathematic(al) representation are obtained, so as to build
Affecting laws of each factor to bolt-spary supports structural bearing performance are found, to instruct the design and implementation of tunnel shotcrete supporting scheme.
In step A, can according to tunnel often with support parameter, previous test data and bibliography determine it is described it is each because
The value range of element, and then determine the level of each factor in orthogonal test scheme, and each factor and respective horizontal progress is orthogonal
Combination designs orthogonal test scheme.
The bolt-spary supports structure sheaf of 6 form of this kind of single anchor rod of the utility model embodiment, test objective are evaluation anchor pole 6
10 bearing performance of support of+bar-mat reinforcement 8+ gunite concretes, each factor mainly includes 6 diameter of anchor pole, anchor pole 6 in the step A
Strength of materials grade, 8 lattice size of bar-mat reinforcement, strength grade, bar diameter, 10 strength grade of gunite concrete and gunite concrete
10 thickness.If laying more anchor poles 6, each factor further includes 6 array pitch of anchor pole in step A.
It, can be by 6 diameter of test specimen anchor pole minimum, 6 array pitch maximums of anchor pole, 6 strength of materials of anchor pole etc. in step D
Grade is minimum or 8 lattice of bar-mat reinforcement are maximum, strength grade is minimum, bar diameter is minimum or 10 strength grade of gunite concrete is minimum and spray
The testing program of concrete 10 thickness minimum is penetrated as standard group, by other 6 diameter of different anchor poles, 6 array pitch of anchor pole, anchor poles 6
Strength of materials grade, 8 lattice size of bar-mat reinforcement, strength grade, bar diameter, 10 strength grade of gunite concrete and gunite concrete
The testing program of 10 thickness is as standard group；
In step D, bearing capacity, peak when load-carrying properties parameter is bolt-spary supports structure sheaf 10 crack initiation of gunite concrete to be measured
It is worth bearing capacity and respective surfaces bulging displacement.10 crack initiation of gunite concrete can be by acoustic emission sensor during experiment
The inner concrete damage acoustic emission signal of reception carries out judging to determine.The bearing capacity can be by poroid loading 3 pressure of air bag
Monitoring data are determined.Described surface bulging displacement can by bolt-spary supports structure sheaf surface displacement Sensor monitoring data into
Row determines.
In addition to the bolt-spary supports structure sheaf of 6 form of this kind of single anchor rod of the utility model embodiment, if bolt-spary supports to be measured
When structure sheaf is single 6 supporting of anchor pole, each factor is then 6 diameter of anchor pole, 6 array pitch of anchor pole and 6 material of anchor pole in the step A
Expect strength grade；
If bolt-spary supports structure sheaf to be measured is single bar-mat reinforcement 8, each factor is big for 8 lattice of bar-mat reinforcement in the step A
Small, strength grade and bar diameter；
If bolt-spary supports structure sheaf to be measured is single 10 supporting of gunite concrete, each factor is spray in the step A
Penetrate 10 thickness of 10 strength grade of concrete and gunite concrete；
If bolt-spary supports structure sheaf to be measured is anchor pole 6+ 8 supportings of bar-mat reinforcement, each factor is anchor pole 6 in the step A
Diameter, 6 array pitch of anchor pole, 6 strength of materials grade of anchor pole, 8 lattice size of bar-mat reinforcement, strength grade and bar diameter；
If bolt-spary supports structure sheaf to be measured is anchor pole 6+ 10 supportings of gunite concrete, each factor is in the step A
6 diameter of anchor pole, 6 array pitch of anchor pole, 6 strength of materials grade of anchor pole, 10 strength grade of gunite concrete and gunite concrete 10 are thick
Degree；
If bolt-spary supports structure sheaf to be measured is bar-mat reinforcement 8+ 10 supportings of gunite concrete, each factor in the step A
For 8 lattice size of bar-mat reinforcement, strength grade, 10 thickness of bar diameter, 10 strength grade of gunite concrete and gunite concrete.
In the step D, except the bolt-spary supports structure sheaf of 6 form of this kind of single anchor rod of the utility model embodiment
Outside, if bolt-spary supports structure sheaf form to be measured meets scenario described below, standard group can carry out true with contrast groups according to the description below
It is fixed：
When testing program is evaluates single 6 bearing performance of support of anchor pole, by 6 diameter of test specimen anchor pole it is minimum,
6 array pitch of anchor pole are maximum and the elementary testing program of 6 strength of materials of anchor pole is as standard group, other different anchor poles 6 are straight
The testing program of 6 strength of materials grade of footpath, 6 array pitch of anchor pole and anchor pole group as a comparison；
When testing program is evaluates single 8 bearing performance of support of bar-mat reinforcement, by 8 lattice of test specimen bar-mat reinforcement most
Greatly, the testing program that strength grade is minimum, bar diameter is minimum is as standard group, by other 8 lattice size of different bar-mat reinforcements, intensity
Grade and the testing program of bar diameter group as a comparison；
When testing program is evaluates single 10 bearing performance of support of gunite concrete, the test specimen is sprayed into coagulation
Native 10 strength grades are minimum and the testing program of gunite concrete 10 thickness minimum is as standard group, and different other are sprayed coagulations
The testing program of native 10 depth of 10 strength grades and gunite concrete group as a comparison；
When testing program is evaluates anchor pole 6+ 8 bearing performance of support of bar-mat reinforcement, by 6 diameter of test specimen anchor pole most
Small, 6 array pitch maximums of anchor pole, 6 strength of materials grade of anchor pole are minimum or 8 lattice of bar-mat reinforcement are maximum, strength grade is minimum and reinforcing bar is straight
The testing program of footpath minimum as standard group, by other 6 diameters of different anchor poles, 6 array pitch of anchor pole, 6 strength of materials grade of anchor pole,
The testing program of 8 lattice size of bar-mat reinforcement, strength grade and bar diameter group as a comparison；
When testing program is evaluates anchor pole 6+ 10 bearing performance of support of gunite concrete, by the test specimen anchor pole 6
Diameter minimum, 6 array pitch maximums of anchor pole, 6 strength of materials grade of anchor pole are minimum or 10 strength grade of gunite concrete is minimum and sprays
The testing program of concrete 10 thickness minimum is penetrated as standard group, by other 6 diameter of different anchor poles, 6 array pitch of anchor pole, anchor poles 6
The testing program of 10 thickness of strength of materials grade, 10 strength grade of gunite concrete and gunite concrete group as a comparison；
When testing program is evaluates bar-mat reinforcement 8+ 10 bearing performance of support of gunite concrete, by the test specimen reinforcing bar
8 lattice of net are maximum, strength grade is minimum, bar diameter is minimum or 10 strength grade of gunite concrete is minimum and gunite concrete 10 is thick
Minimum testing program is spent as standard group, by other 8 lattice size of bar-mat reinforcement, strength grade, bar diameter, gunite concretes 10
The testing program of 10 thickness of strength grade and gunite concrete group as a comparison.
This kind disclosed in the utility model is used for the pilot system of testing tunnel initial stage bolt-spary supports load-carrying properties, test
Object can be single anchor pole 6, bar-mat reinforcement 8 or gunite concrete 10, anchor pole 6+ bar-mat reinforcements 8 combine, anchor pole 6+ sprays coagulation
10 combination of soil, bar-mat reinforcement 8+ gunite concretes 10 combine or 10 combination supporting of anchor pole 6+ bar-mat reinforcement 8+ gunite concretes, functional
By force, the deficiency that routine test system is difficult to Validity Test is compensated for.The utility model is by orthogonal test analysis method, to Dan Yin
The bolt-spary supports structural bearing performance of element or multifactor impact carries out comprehensive quantitative analysis and evaluation, is more in line with live reality,
Effective directive significance can be played to the design of tunnel shotcrete supporting construction.
The foregoing is merely the preferable specific implementations of the utility model pilot system, as known by the technical knowledge, this reality
It can also be realized with new by the embodiment of other essence without departing from its spirit or essential feature.Therefore, with regard to each side
For face, all it is merely illustrative, it is not the only, all in the scope of the utility model or to be equal to the utility model
In the range of change be included in the utility model.
Claims (6)
1. a kind of pilot system for testing tunnel initial stage bolt-spary supports load-carrying properties, which is characterized in that including support device,
The support device is divided into upper and lower two parts, and top is arranged with bolt-spary supports structure sheaf to be measured；Lower part is provided with poroid add
Carrier gas capsule, for the bottom of the poroid loading air bag by support device, top layer is equipped with poroid elastic rubber power transmission layer；Institute
The poroid loading air bag stated is connected with the first power source, and that realizes the air bag fills exhaust；First power source is controlled with center
System processed is connected, it can be achieved that including but not limited to the bolt-spary supports structure sheaf load under simple plus unloading, cyclic load operating mode
The Validity Test of energy.
2. a kind of pilot system for testing tunnel initial stage bolt-spary supports load-carrying properties as claimed in claim 1, feature exist
In the support device includes bottom base, and bottom base upper surface sets the frame structure gone along with sb. to guard him by F shape steel plates, F
Shape steel plate is equipped with the upper and lower overhanging step edge of a wing, the upper and lower overhanging step wing towards the inside of test device along short transverse
Support device is divided into upper and lower two parts by edge；The bottom base uniform intervals are equipped with series of apertures, position of opening activity
Pedestal stopple is set, and the upper overhanging step edge of a wing can move up and down setting along F shape steel plates.
3. such as a kind of pilot system for testing tunnel initial stage bolt-spary supports load-carrying properties in claim 2, feature exists
In the form of the bolt-spary supports structure sheaf to be measured includes but not limited to single anchor pole, bar-mat reinforcement or gunite concrete, anchor
Bar+bar-mat reinforcement combination, anchor pole+gunite concrete combination, bar-mat reinforcement+gunite concrete combination and anchor pole+bar-mat reinforcement+injection coagulation
Local soil type closes；
Overhanging step edge of a wing upper surface under bar-mat reinforcement periphery in bolt-spary supports structure sheaf to be measured is fixed on the inside of F shape steel plates；Anchor
Bar sequentially passes through bar-mat reinforcement, poroid elastic rubber, poroid loading air bag and bottom base, anchor pole by position of opening from top to bottom
Installation is fixed by anchor rod pallet board and nut in two outer ends；Gunite concrete is uniformly injected in the upper surface of bar-mat reinforcement, spray
Depending on thickness is penetrated according to different test requirements documents.
4. such as a kind of pilot system for testing tunnel initial stage bolt-spary supports load-carrying properties in claim 3, feature exists
In in the bolt-spary supports structure sheaf, anchor pole, bar-mat reinforcement, gunite concrete position are equipped with stress monitoring sensor, injection
Concrete upper surface is equipped with displacement monitoring sensor and acoustic emission monitor(ing) sensor, the stress monitoring sensor, displacement prison
Survey sensor, acoustic emission monitor(ing) sensor is connected with central control system.
5. a kind of pilot system for testing tunnel initial stage bolt-spary supports load-carrying properties as claimed in claim 1, feature exist
In, the poroid loading air bag uniform intervals are provided with series of apertures, and position of opening is corresponding with bottom base position of opening,
Poroid loading air bag is connected by air inlet and exhaust piper with the first power source, and that realizes poroid loading air bag fills exhaust；Described first
Power source is high-pressure pump.
6. a kind of pilot system for testing tunnel initial stage bolt-spary supports load-carrying properties as claimed in claim 1, feature exist
In the poroid elastic rubber is located at poroid loading air bag upper surface, and poroid elastic rubber uniform intervals are provided with series and open
Hole, position of opening is corresponding with bottom base and poroid loading air bag position of opening, and position of opening activity sets rubber stopple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107941620A (en) * | 2017-11-16 | 2018-04-20 | 山东建筑大学 | Underground engineering bolt-mesh-spurting supporting structural mechanical property test evaluation device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107941620A (en) * | 2017-11-16 | 2018-04-20 | 山东建筑大学 | Underground engineering bolt-mesh-spurting supporting structural mechanical property test evaluation device and method |
| CN107941620B (en) * | 2017-11-16 | 2024-01-26 | 山东建筑大学 | Mechanical property test evaluation device and method for underground engineering anchor net spray supporting structure |
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