CN109000609B - Without steelframe bolt-spary supports tunnel concrete strain test device and test method - Google Patents
Without steelframe bolt-spary supports tunnel concrete strain test device and test method Download PDFInfo
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- CN109000609B CN109000609B CN201810732150.XA CN201810732150A CN109000609B CN 109000609 B CN109000609 B CN 109000609B CN 201810732150 A CN201810732150 A CN 201810732150A CN 109000609 B CN109000609 B CN 109000609B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/32—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring the deformation in a solid
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Abstract
The invention discloses a kind of no steelframe bolt-spary supports tunnel concrete strain test device and test methods, including locating rod, concrete strain gauge, positioning retaining ring, fixing pipe and the mountable firm banking on country rock, fixing pipe is affixed on the fixed base, the both ends of locating rod are connect with a fixing pipe respectively, positioning retaining ring is mounted in locating rod, the both ends of concrete strain gauge include strain gauge end disc, concrete strain gauge gap is socketed in positioning retaining ring, and realizes that the blocking to concrete strain gauge limits by strain gauge end disc.The concrete strain test device can not only be prefabricated in advance, and scene is embedded quick, improves inbuilt working efficiency, while apparatus structure is simple, component is less, disturbs to the original stress characteristic of permanent bolt-spary supports structure smaller.Using the device and test method, bolt-spary supports tunnel can be accurately tested out without the concrete strain distribution under steelframe support form.
Description
Technical field
The present invention relates to tunnel structure the field of test technology more particularly to a kind of no steelframe bolt-spary supports tunnel concrete
Strain detection testing device and test method.
Background technique
Permanent Shotcrete Rockbolt Support Technique is derived from one of constructing tunnel mainstream support technology of Norwegian law.Permanent shotcrete
Support form is made of two or more layers gunite concrete and necessary support unit corresponding with wall rock condition, and support unit is logical
Often be anchor pole, steelframe, compared to New Austrian Tunneling Method frequently with composite lining support form, the former is without cableway and is molded into two
Secondary lining cutting greatly accelerates constructing tunnel speed, has saved manpower and material resources, economy with higher.
For the stress characteristic for studying permanent bolt-spary supports structure, engineering staff needs the stress for spraying concrete structure to it, answers
Become the rule of development and gives long term monitoring.Currently, the embedded fixing means of concrete strain gauge is main in tunnel support structure test
Are as follows: be directly bound on circumferential steelframe, radially set reinforcing bar or to erect circumferential reinforcement auxiliary embedded.
Firstly, strain gauge, which is bound to the fixing means on steelframe only, can be suitably used for lay in the support form of steelframe,
Do not have adaptability to the support form (i.e. without steelframe bolt-spary supports tunnel) of not set steelframe；
Then, for no steelframe bolt-spary supports tunnel, at present frequently with radially setting reinforcing bar to country rock and by strain gauge
The fixed form being bundled on reinforcing bar, for the phase for guaranteeing fixed effect to prevent the enormous impact force of spray concrete from strain gauge being caused to occur
Usually there is the phenomenon that excessively binding strain gauge, lead to strain gauge and reinforcing bar common eigenvector in the unfavorable displacements such as mistake sliding；
Finally, for circumferential reinforcement is erected in permanent bolt-spary supports structure carry out that inbuilt mode is auxiliarily fixed, due to
The presence of circumferential reinforcement will make the stress characteristic of supporting construction change, and lead to the reduction of test data validity, meanwhile,
The embedded fixing means of existing concrete strain gauge is not easy to the strain variation or stress of any position of test supporting construction
Distribution.
Summary of the invention
It is an object of that present invention to provide one kind to have adaptability to each support form in no steelframe bolt-spary supports tunnel, buries
If mode facilitates simple and direct, test data accurately and effectively without steelframe bolt-spary supports tunnel concrete strain test device and test
Method, to solve the above problems.
To achieve the above object, the present invention discloses a kind of no steelframe bolt-spary supports tunnel first and is tested with concrete strain
Device, it is described solid including locating rod, concrete strain gauge, positioning retaining ring, fixing pipe and the mountable firm banking on country rock
Surely manage it is affixed the both ends of the locating rod are connect with a fixing pipe respectively on the fixed base, the positioning retaining ring
It is mounted in the locating rod, the both ends of the concrete strain gauge include strain gauge end disc, the concrete strain gauge
Gap is socketed in positioning retaining ring, and realizes that the blocking to concrete strain gauge limits by the strain gauge end disc.
Further, the fixing pipe includes casing and telescoping tube, and the telescoping tube extension type is plugged in described sleeve pipe
Interior, one end of described sleeve pipe and the firm banking are affixed, the both ends of the locating rod connect with described sleeve pipe or with
The telescoping tube connection.
Further, the other end of described sleeve pipe is provided with conical external screw thread portion, the tapered thread pipe portion matching connection
The fixing sleeve of conical internal thread is set in having with the telescoping tube that is fixedly clamped.
Further, the surface of the telescoping tube is marked with graduation mark along its axial direction.
Further, the both ends of the locating rod are vertically arranged with the fixing pipe, and the fixing pipe is relative to described fixed
Position bar is symmetrical arranged.
Further, the positioning retaining ring is using round mountain-climbing retaining ring.
Then the invention discloses a kind of being surveyed without steelframe bolt-spary supports tunnel with concrete strain as described in above scheme
The test method that trial assembly is set, includes the following steps:
1) concrete strain test device is fixed on tunnel surrounding face along tunnel circumferential direction, by screwing fixing sleeve
The length of telescoping tube is adjusted to strain depth to be measured, and be socketed the concrete strain gauge using locating button czermak space；
2) the strain gauge test lead of concrete strain gauge is led to and gives concentrated protection in line concentrating case；
3) after performing to tunnel shotcrete supporting construction, production concrete strain corrects test specimen, answers in the concrete
It turns revisionism and concrete strain gauge is set in positive test specimen；
4) the strain gauge evidence of periodic monitoring tunnel support structure and solidifying native strain correction test specimen passes through solidifying native strain correction
The strain gauge of test specimen obtains each support form in bolt-spary supports tunnel according to being corrected to tunnel support structure concrete strain value
Concrete strain distribution.
Compared with the prior art, the advantages of the present invention are as follows:
The present invention provides a kind of no steelframe bolt-spary supports tunnel concrete strain test device and test methods, thus
The concrete strain distribution of each support form in no steelframe bolt-spary supports tunnel can accurately be tested out.Concrete strain test dress
Setting can not only be prefabricated in advance, and scene, which only needs to set fixed screw when embedded to be fixed device, can position concrete strain
Meter, improves inbuilt working efficiency, moreover, apparatus structure is simple, component is less, to the permanent original stress of bolt-spary supports structure
Characteristic disturbances are smaller, guarantee the validity of test data, in addition, device has retractable, can meet different test depth
Requirement, solving the problems, such as to backbreak because of tunnel causes temporarily increase test depth, and the quarter according to apparatus surface
Angle value can read present apparatus length in real time, and length, which is converted, can acquire corresponding test depth.The test method passes through
The data of amendment test specimen correct tunnel support structure concrete strain value, guarantee the accuracy of test data, meanwhile, it is right
The permanent each support form in bolt-spary supports tunnel has adaptability, can satisfy embedding manner and facilitates simple and direct, test data is accurate
Effective test request.
Below with reference to accompanying drawings, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is that the axis of no steelframe bolt-spary supports tunnel disclosed by the embodiments of the present invention concrete strain test device surveys knot
Structure schematic diagram；
Fig. 2 is the main view knot of no steelframe bolt-spary supports tunnel disclosed by the embodiments of the present invention concrete strain test device
Structure schematic diagram；
Fig. 3 is the vertical view knot of no steelframe bolt-spary supports tunnel disclosed by the embodiments of the present invention concrete strain test device
Structure schematic diagram；
Fig. 4 be no steelframe bolt-spary supports tunnel disclosed by the embodiments of the present invention concrete strain test device casing and
Telescoping tube connection schematic diagram.
Fig. 5 is placed in vault with concrete strain test device for no steelframe bolt-spary supports tunnel disclosed by the embodiments of the present invention
Locate scheme of installation；
Fig. 6 is that test method of the present invention tests the tunnel support structure vault concrete strain signal without steelframe support form
Figure；
Fig. 7 is cutaway enlargement diagram at the A-A of Fig. 6.
Marginal data:
1, locating rod；
2, concrete strain gauge；21, test lead；22, strain gauge end disc；23, strain gauge shell；
3, retaining ring is positioned；
4, fixing pipe；41, casing；411, round tube portion；412, tapered thread pipe portion；42, telescoping tube；43, fixing sleeve；
5, firm banking；51, fixed circular hole；52, fixed screw；
6, test lead locating button；61, locating button fixed screw；
7, line concentrating case；
8, concrete strain corrects test specimen.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
As shown in Fig. 1-Fig. 7, the embodiment of the present invention discloses a kind of no steelframe bolt-spary supports tunnel first and is answered with concrete
Become test device, including consolidating for locating rod 1, concrete strain gauge 2, positioning retaining ring 3, fixing pipe 4 and connection country rock and fixing pipe 4
Determine pedestal 5, the both ends of the locating rod 1 are connect with the fixing pipe 4 respectively, and the positioning retaining ring 3 is mounted on the locating rod 1
On, 2 gap of concrete strain gauge is socketed in positioning retaining ring 3, and is realized by strain gauge end disc 22 to concrete
The blocking of strain gauge 2 limits, and concrete strain gauge can be placed in strain depth to be measured by adjustment 4 length of fixing pipe.The concrete
Strain detection testing device can not only be prefabricated in advance, and scene, which only needs to set fixed screw 52 when embedded, to be fixed device and can determine
Position concrete strain gauge 2, improves inbuilt working efficiency, while apparatus structure is simple, component is less, to permanent bolt-spary supports
The original stress characteristic disturbance of structure is smaller, guarantees the validity of test data.
In the present embodiment, firm banking 5 uses diameter for 6cm~10cm, with a thickness of the rosette of 5mm~10mm, Gu
Determine screw 52 and use setscrew in the prior art, screw specification is M6~M10, and screw length is 80mm~120mm, fixed
Circular hole 51, which can be used drilling machine and drill through screw hole corresponding with 52 specification of fixed screw, to be obtained, and sets fixation by fixed circular hole 51
Device can be fixed by screw 52.
In the present embodiment, fixing pipe 4 includes casing 41, telescoping tube 42 and the fixing sleeve 43 of metal material.41 one end of casing
Be connected with firm banking 5, the other end is connected with telescoping tube 42, by screw fixing sleeve 43 adjust 42 length of telescoping tube can will be another
End is fixed at certain depth, since it is with telescopic function, so that device is not only to each support form difference concrete
The strain testing of thickness has adaptability, moreover it is possible to meet the requirement of the different test depth of any concrete thickness, in addition, its table
Scale value is carved in face, can read present apparatus length in real time, length, which is converted, can acquire corresponding test depth.This implementation
The casing 41 of example is made of round tube portion 411 and tapered thread pipe portion 412, and round tube portion 411 uses outer diameter 3cm~4cm, pipe range 10cm
The thin-wall metal round tube of~15cm, consistent, the osculum end internal diameter using big opening end internal diameter and round tube portion 411 of tapered thread pipe portion 412
Less than round tube portion 411, the conical pipe of pipe range 2cm~3cm, 412 outer surface of tapered thread pipe portion is equipped with screw thread, round tube portion 411 1
End and the big mouth section of tapered thread pipe portion 412, the other end and firm banking 5 are all made of welding electrode arc welding in the prior art and are connected
It connects.The telescoping tube 42 of the present embodiment is slightly smaller than 412 osculum end of tapered thread pipe portion, pipe range etc. using outer diameter and is longer than or is slightly smaller than set
The thin-wall metal round tube of pipe 41, telescoping tube 42 is placed within by 412 osculum end pipe mouth of tapered thread pipe portion, and guarantees flexible
Pipe 42 can be along the extended or retracted smooth slippage of nozzle, in addition, 42 surface of telescoping tube need to be carved with the scale value that scale division value is 1cm.This
The fixing sleeve 43 of embodiment is the conical pipe knot that big mouth section internal diameter, osculum end internal diameter, pipe range are slightly smaller than tapered thread pipe portion 412
Structure, pipe in be equipped with the matched conical internal thread of tapered thread pipe portion 412, fixing sleeve 43 is screwed by forward direction and holds tapered thread
It is self-locking to push the generation friction realization of telescoping tube 42 for pipe portion 412, conversely, reversely screwing the reduction of fixing sleeve 43 holds degree, with realization
The free extension of telescoping tube 42.
In the present embodiment, locating rod 1 is arranged in the upper and lower ends of fixing pipe 4, locating rod 1 use outer diameter for 10mm~
15mm, the metallic rod of a length of 16~20cm, wherein the locating rod 1 (both ends are affixed with casing 41) for being arranged in lower end arrives fixed bottom
The distance of seat 5 is 3cm~5cm, and the locating rod 1 for being arranged in upper end is connected with the upper end of telescoping tube 42, and (both ends are and telescoping tube
42 is affixed), locating rod 1 and casing 41, telescoping tube 42 are attached using welding electrode arc welding in the prior art.Two locating rods
1 arrangement can not only improve the stability of device, it is often more important that it is deep to provide two different tests for concrete strain gauge 2
The locating platform of degree (is also laid with the concrete strain distribution that this can measure different depth at tunnel same position with gradient
To be multiple, specifically depending on demand).
In the present embodiment, positioning 3 side of retaining ring is fixed in locating rod 1, concrete strain gauge 2 is buckled in ring by the other side
It is interior.Retaining ring 3 is positioned using round retaining ring of climbing the mountain in the prior art, positioning retaining ring 3 is arranged in 1 two sides of locating rod, positions retaining ring 3
Spacing is slightly smaller than 22 spacing of strain gauge end disc, and retaining ring internal diameter is slightly larger than the diameter of strain gauge shell 23 and is less than strain gauge end
Disk 22 diameter in portion's anchors concrete strain gauge 2 while positioning in retaining ring 3, and it is anti-to have gap between positioning retaining ring 3
Only the generation of the two common eigenvector influences the measuring accuracy of concrete strain gauge 2.Positioning retaining ring 3 and locating rod 1 use the prior art
In welding electrode arc welding be attached.
Present apparatus structure is simple, component is less, smaller to the disturbance of bolt-spary supports structure original stress characteristic, avoids traditional
Concrete strain gauge 2 is due to depending on reinforcing bar or steelframe, because reinforcing bar or steel frame deformation lead to the deformation of concrete strain gauge 2 in turn
The problem of leading to 2 test distortion of concrete strain gauge.Guarantee the validity of test data, in addition, device has retractable,
The requirement that different test depth can be met, solving the problems, such as to backbreak because of tunnel causes temporarily increase test depth, and
And present apparatus length can be read in real time according to the scale value of apparatus surface, length is converted, and it is deep to acquire corresponding test
Degree.
As shown in Figures 5 to 7, the present embodiment without steelframe bolt-spary supports tunnel concrete strain testing method, including with
Lower step:
1) fixed screw 52 is set by firm banking 5 along tunnel circumferential direction, device is fixed on tunnel surrounding face,
42 length of telescoping tube is adjusted to strain depth to be measured by screwing fixing sleeve 43, and using described in the socket of positioning 3 gap of retaining ring
Concrete strain gauge 2；
2) after the completion of concrete strain gauge 2 is embedded, test lead 21 is led to along country rock face using test lead locating button 6
Give concentrated protection in line concentrating case 7；
3) concrete strain amendment test specimen 8 is made in a manner of spraying big plate, and 2 Transducers Embedded in Concrete of concrete strain gauge is answered
It turns revisionism in positive test specimen 8, tunnel support structure and concrete strain amendment test specimen 8 is placed under identical conditions and is conserved；
4) the strain gauge evidence of periodic monitoring tunnel support structure and concrete strain amendment test specimen 8, is answered by concrete
The data of positive test specimen 8 of turning revisionism correct 2 strain value of tunnel support structure concrete strain gauge, to obtain bolt-spary supports tunnel
The concrete strain distribution situation of each support form.
In the present embodiment, test lead locating button 6 makes test lead 21 smoothly lead to line concentration for fixing test lead 21
Give concentrated protection in case 7.Test lead locating button 6 is buckled using saddle in the prior art, and saddle buckle arrangement spacing is
1m~1.5m chooses the saddle card that can accommodate the correspondence inside nominal diameter of whole test leads 21 according to the quantity of test lead 21
Saddle buckle is fixed by button by setting locating button fixed screw 61.Locating button fixed screw 61 is using in the prior art
Setscrew, screw specification be M6~M8, screw length be 65mm~80mm.
In the present embodiment, concrete strain amendment test specimen 8 is for correcting tunnel support structure concrete strain test result.
Since concrete strain amendment test specimen 8 is produced with tunnel support structure using identical material and is conserved under identical conditions,
And not by any external force, therefore tunnel support structure concrete can be answered using the strain value of concrete strain amendment test specimen 8
Variate is modified, to exclude the influence of concrete shrinkage and creep and temperature change to test result.
The present embodiment it is as follows with the implementation steps of concrete strain test device without steelframe bolt-spary supports tunnel:
Step 1: taking 2 diameters is 8cm, with a thickness of the rosette of 10mm, using drilling machine in each disc surfaces
It drills through 3 8mm circular screwholes and obtains firm banking 5；
Step 2: round tube portion 411 of the thin-wall metal round tube of 2 root canal diameter 3.5cm, pipe range 12cm as casing 41 is taken, takes 2
Root canal diameter 3.2cm, pipe range 10cm thin-wall metal round tube as telescoping tube 42, take mouth section caliber 3.5cm 2 big, osculum section pipe
Tapered thread pipe portion 412 of the thin-wall metal conical pipe as casing 41 of diameter 3.3cm, pipe range 2cm, outside tapered thread pipe portion 412
Surface, which is carved, is equipped with screw thread, takes the conical pipe of mouth section caliber 3.4cm 2 big, osculum section caliber 3.2cm, pipe range 2cm as fixing sleeve
43,43 inner surface of fixing sleeve carve be equipped with the matched conical internal thread of tapered thread pipe portion 412, by the way of welding electrode arc welding
411 one end of round tube portion and the big mouth section of tapered thread pipe portion 412 are welded, the production of casing 41 is completed, by telescoping tube 42
Nozzle by tapered thread pipe portion 412 is placed within, after adjusting telescoping tube 42 to suitable extension elongation, screws fixing sleeve 43
Fixed telescoping tube 42, completes the production of fixing pipe 4, by firm banking 5 in 4 round tube portion of fixing pipe, 411 end and step 1 using weldering
The mode of arc welding is welded；
Step 3: taking 2 outer diameters is 15mm, and the metallic rod of a length of 18cm is as locating rod 1, using the side of welding electrode arc welding
Two casings 41 in step 2 or two telescoping tubes 42 are welded in one by formula, and welding position is respectively 42 upper end of telescoping tube
Head, distance sleeve 41 the position lower end 3cm~5cm at；
Step 4: taking 4 round mountain-climbing retaining rings, retaining ring specification meet internal diameter slightly larger than buried 23 diameter of strain gauge shell and
Less than the requirement of 22 diameter of strain gauge end disc, by 4 round Fastener for climbing mountain boxing in step by the way of welding electrode arc welding
The both ends of 2 locating rods 1 in three, while the retaining ring welding spacing in single locating rod 1 is slightly smaller than buried strain gauge end disc
22 spacing；
Step 5: concrete strain gauge 2 is fitted into step 4 in round mountain-climbing retaining ring, confirmation retaining ring can anchored preferably
While concrete strain gauge 2, there are gaps between concrete strain gauge 2, after confirmed, that is, are considered as the prefabricated completion of device.
The implementation steps without steelframe bolt-spary supports tunnel concrete strain testing method of the present embodiment are as follows:
Step 1: after the completion of tunnel needs test position to excavate, prefabricated test device, which is placed in tunnel, needs test department
Device, is fixed by position by squeezing into M8 setscrew to country rock, and one end is fixed on to be measured by the length of adjustment fixing pipe 4
Depth is strained, concrete strain gauge 2 is packed into positioning retaining ring 3, and record the scale value of current fixing pipe 4, will currently be carved
Angle value is added with the length of casing 41, and the current test depth of concrete strain gauge 2 can be obtained.
Step 2:, which using inside nominal diameter to buckle for the saddle of 15mm, and sets locating button fixed screw 61 (setscrew) incites somebody to action
Test lead 21 is led in line concentrating case 7 along country rock face gives concentrated protection.
Step 3: after being performed to tunnel shotcrete supporting construction, 2 concrete strains are made in a manner of spraying big plate and are repaired
Positive test specimen 8, and by 2 Transducers Embedded in Concrete strain correction test specimen 8 of concrete strain gauge, by tunnel support structure and concrete strain
Amendment test specimen 8 conserves under identical conditions.
Step 4: periodic monitoring tunnel support structure and concrete strain correct 8 strain gauge evidence of test specimen, mixed by 2
The strain mean of solidifying soil strain correction test specimen 8 corrects tunnel support structure concrete strain value, i.e., supporting construction is mixed
The strain mean that solidifying soil strain value subtracts strain correction concrete strain amendment test specimen 8 can obtain supporting construction concrete and answer
Become true value, the concrete strain of the current support form in bolt-spary supports tunnel can be obtained according to the measuring point strain of different test depth
Distribution.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of no steelframe bolt-spary supports tunnel concrete strain test device, which is characterized in that including locating rod (1), mix
Solidifying soil strain gauge (2), positioning retaining ring (3), fixing pipe (4) and the mountable firm banking (5) on country rock, the fixing pipe
(4) it is fixed on the firm banking (5), the both ends of the locating rod (1) are connect with a fixing pipe (4) respectively, described
Positioning retaining ring (3) is mounted on the locating rod (1), and the both ends of the concrete strain gauge (2) include strain gauge end disc
(22), concrete strain gauge (2) gap is socketed in positioning retaining ring (3), and passes through the strain gauge end disc (22)
It realizes and the blocking of concrete strain gauge (2) is limited, the fixing pipe (4) includes casing (41) and telescoping tube (42), described to stretch
The draw (42) extension type is plugged in described sleeve pipe (41), and one end of described sleeve pipe (41) and the firm banking (5) are affixed,
The both ends of the locating rod (1) connect with described sleeve pipe (41) or connect with the telescoping tube (42).
2. no steelframe bolt-spary supports tunnel concrete strain test device according to claim 1, which is characterized in that institute
The other end for stating casing (41) is provided with tapered thread pipe portion (412), and tapered thread pipe portion (412) matching is connected with interior set
The fixing sleeve (43) of conical internal thread is with the be fixedly clamped telescoping tube (42).
3. no steelframe bolt-spary supports tunnel concrete strain test device according to claim 2, which is characterized in that institute
The surface for stating telescoping tube (42) is marked with graduation mark along its axial direction.
4. no steelframe bolt-spary supports tunnel concrete strain test device according to claim 1 to 3, feature
It is, both ends and the fixing pipe (4) of the locating rod (1) are vertically arranged, and the fixing pipe (4) is relative to the locating rod
(1) it is symmetrical arranged.
5. no steelframe bolt-spary supports tunnel concrete strain test device according to claim 1 to 3, feature
It is, the positioning retaining ring (3) is using round mountain-climbing retaining ring.
6. it is a kind of as described in claim 2-5 is any without the test of concrete strain test device of steelframe bolt-spary supports tunnel
Method includes the following steps:
1) concrete strain test device is fixed on tunnel surrounding face along tunnel circumferential direction, by screwing fixing sleeve (43)
The length of telescoping tube (42) is adjusted to strain depth to be measured, and is socketed the concrete strain using positioning retaining ring (3) gap
It counts (2)；
2) the strain gauge test lead (21) of concrete strain gauge (2) is led in line concentrating case (7) and gives concentrated protection；
3) after being performed to tunnel shotcrete supporting construction, production concrete strain amendment test specimen (8), in the concrete strain
It corrects in test specimen (8) and concrete strain gauge (2) is set；
4) the strain gauge evidence of periodic monitoring tunnel support structure and solidifying native strain correction test specimen (8) passes through solidifying native strain correction
The strain gauge of test specimen (8) obtains each supporting in bolt-spary supports tunnel according to being corrected to tunnel support structure concrete strain value
The concrete strain of form is distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810732150.XA CN109000609B (en) | 2018-07-05 | 2018-07-05 | Without steelframe bolt-spary supports tunnel concrete strain test device and test method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810732150.XA CN109000609B (en) | 2018-07-05 | 2018-07-05 | Without steelframe bolt-spary supports tunnel concrete strain test device and test method |
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| CN109000609B true CN109000609B (en) | 2019-09-27 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109029338B (en) * | 2018-08-03 | 2024-01-05 | 长江勘测规划设计研究有限责任公司 | Embedded concrete strain measurement device and construction method thereof |
| CN110940579A (en) * | 2019-11-12 | 2020-03-31 | 铜陵有色金属集团铜冠矿山建设股份有限公司 | Detection equipment for sprayed concrete supporting structure |
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|---|---|---|---|---|
| CN201935681U (en) * | 2010-12-08 | 2011-08-17 | 大连民族学院 | Dual axial pressure loaded strain testing device for concrete |
| CN106352844A (en) * | 2016-09-30 | 2017-01-25 | 石家庄铁道大学 | Tunnel monitoring device |
| CN206832225U (en) * | 2017-06-27 | 2018-01-02 | 南京源自电力自动化设备有限公司 | Overhaul the measurement apparatus of the underwater deformation of steel-slag sand |
| CN207163432U (en) * | 2017-08-22 | 2018-03-30 | 重庆恒信水利工程质量检测有限责任公司 | Compensating concrete detection means and system |
| CN108151689A (en) * | 2017-11-20 | 2018-06-12 | 中国建筑股份有限公司 | High accuracy displacement sensor |
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2018
- 2018-07-05 CN CN201810732150.XA patent/CN109000609B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201935681U (en) * | 2010-12-08 | 2011-08-17 | 大连民族学院 | Dual axial pressure loaded strain testing device for concrete |
| CN106352844A (en) * | 2016-09-30 | 2017-01-25 | 石家庄铁道大学 | Tunnel monitoring device |
| CN206832225U (en) * | 2017-06-27 | 2018-01-02 | 南京源自电力自动化设备有限公司 | Overhaul the measurement apparatus of the underwater deformation of steel-slag sand |
| CN207163432U (en) * | 2017-08-22 | 2018-03-30 | 重庆恒信水利工程质量检测有限责任公司 | Compensating concrete detection means and system |
| CN108151689A (en) * | 2017-11-20 | 2018-06-12 | 中国建筑股份有限公司 | High accuracy displacement sensor |
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| CN109000609A (en) | 2018-12-14 |
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