CN200989770Y - Sleeve type hole drilling multipoint extension meter - Google Patents
Sleeve type hole drilling multipoint extension meter Download PDFInfo
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- CN200989770Y CN200989770Y CNU200620036487XU CN200620036487U CN200989770Y CN 200989770 Y CN200989770 Y CN 200989770Y CN U200620036487X U CNU200620036487X U CN U200620036487XU CN 200620036487 U CN200620036487 U CN 200620036487U CN 200989770 Y CN200989770 Y CN 200989770Y
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- extension tube
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Abstract
The utility model discloses a sleeve bore multiple point extensometer to measure the distortion and loose of the tunnel wall rock, the extensometer can accurately measure the displacement in different depths, the extensometer includes an extension rod and at least an extension tube in sleeve on the extension rod. The ends of the extension rod and the extension tube extend into the measurement holes are fixed with adhesive agent packages; the axis position of each adhesive agent package corresponds to each measurement point inside the measurement hole. The other ends of the extension rod and the extension tube extend to the opening of the measurement hole, which can concentrate the displacements in different depths on one bore for measurement, which simplifies the field operation. The utility model has the advantages of good environment adaptability, simple operation, accurate measurement performance, low cost and simple operation, in particular applicable to measure the distortion and loose of the tunnel wall rock.
Description
Technical field
The utility model relates to a kind of measurement mechanism, in particular for the sleeve bore multidot tensiometer of the loosening deformation measurement of tunnel surrounding.
Background technology
The monitoring in tunnel occupies important position in Tunnel Engineering, the monitoring measurement in tunnel is exactly in the tunnel excavation process, uses various instrument and equipments and measures equipment, and to the various displacements in tunnel, stress or the like measures.The tunnel is owing to the singularity of himself, and its field monitoring has special vital role, and its importance is just as the same with the Static Calculation that xoncrete structure is carried out to steel construction.The tunnel is behind excavation, and the rock primary stress field is destroyed around the hole, and its residing stress state changes, and has broken the stress equilibrium state before the excavation, and country rock can reach a new balance by the adjustment of distortion and stress.This adjustment is a dynamic process, therefore the distortion of country rock also is a dynamic process, the displacement of the inner each point of country rock is the dynamic performance of surrouding rock deformation, it can reflect the relax level of country rock inside and the size of lax scope, it also is an important parameter index judging stability of surrounding rock, grasp the deformation tendency of country rock by the surrouding rock deformation multidate information, promptly obtain displacement one time curve by measuring, variation tendency to each total displacement amount, velocity of displacement and displacement acceleration is constantly analyzed, thereby holds the distortion situation of country rock.In general, reduce gradually to the country rock deep deformation from the hole wall, along with the increase of time, distortion trend gradually is stable.Therefore, can carry out tracking and monitoring, seek the position of different depth displacement sudden change, determine the same stable time of degree of depth displacement trend, can forecast the country rock large deformation, determine suitable support time the radial displacement at rock different depth place around the hole.
Constructing tunnel itself has certain complicacy, and its deformation monitoring does not also have very perfect instrument at present, and the characteristics of himself also have certain requirement to the monitoring instrument in tunnel, summarize get up to have following some: 1, equipment precision requirement height; 2, automaticity requires high; 3, environmental suitability is strong; 4, strong operability.The measurement of the loosening distortion of tunnel surrounding mainly contains two big class methods at present, and a class is only to measure the method for hole wall acoplanarity displacement, and this method can only measure the amount of contraction of hole wall surface, and most convergence gauges that adopt are measured; Another kind of is to adopt the boring multipoint displacement meter that the displacement of different depth is measured.
Multipoint displacement meter is the relative displacement that is used to measure rock mass deep different parts, or with respect to the absolute displacement of a certain reference point, the multi-point displacement value is directly obtained by measurement, the displacement of deep measuring point because the superficial part measuring point has superposeed, thereby make measuring value can not reflect the displacement situation of country rock deep each point intuitively.Country rock is dark more, and its absolute displacement should be more little, so can think approx that when boring is dark the displacement of measuring point is zero or can ignores at the bottom of the hole.Like this, adopt the relative displacement value, more can reflect the displacement situation of country rock deep each point than direct measuring value intuitively.Its ultimate principle is: along different azimuth (generally along the hole wall normal direction) boring of hole wall to the country rock deep, be embedded in the boring with multipoint displacement meter, form a series of measuring points.Steel wire of drawing by measuring point or metal guide rod are delivered to drilling orifice with the displacement of measuring point rock, observation is by the relative displacement of anchor point to the aperture, thereby calculate the Displacements Distribution of anchoring measuring point, can use electrical measuring method or stem-winder measurement method etc. to measure along the drilling axis direction.The embedding manner of multipoint displacement meter can be divided into showing in the pre-buried and digging process before the excavation and bury, pre-buried multipoint displacement meter to before excavating measuring frequency section, be equivalent at least the maximum characteristic dimension of twice cavern section apart from the time just buried and finished, and begin to measure initial reading.Now bury then instrument and will try one's best near face, because after the excavation beginning, the release of stress can take place rapidly in country rock, and distortion also can produce rapidly, and the anchoring measuring point in the same boring should be arranged in the bigger scope of displacement gradient more.The result that multipoint displacement meter is measured can comprise: each measuring point displacement and time relation, relation between each measuring point displacement and the excavation drilling depth, along the change in displacement and the distribution situation of axis direction, the field data of this distribution form is to selecting the helpful and meaning of displacement back analysis model in the boring.
Multi-point displacement is in respect of sensor type and mechanical type two classes.Sensor type cost height, poor stability can not be used for long term monitoring and a large amount of the use.Mechanical type mainly adopts the rod-type multipoint displacement meter, its major defect is two aspects: (1) adopts full hole cementation, and the displacement of each degree of depth phase mutual interference sometimes makes the measurement result distortion, this full hole grouting contact is to the highly significant that influences of distortion, particularly in weak rock mass.When adopting total length grouting usually, when being analyzed, the data of being surveyed all to fully take into account the reinforcement effect of mortar to country rock, and very important especially in soft rock, but this reinforcement effect has great influence on earth, can only the dependence experience judge at present.(2) starting material of rod-type multipoint displacement meter and processing cost be than higher, so application cost is higher, is unfavorable for promoting the use of.
The utility model content
Technical problem to be solved in the utility model provides a kind of sleeve bore multidot tensiometer that can measure the displacement of a plurality of different depths accurately.
The technical scheme that its technical matters that solves the utility model adopts is: sleeve bore multidot tensiometer, it is characterized in that: comprise extend bar and the empty extension tube of one deck at least that is enclosed within on the bar of extending, successively the quantity of the extension tube of suit is determined according to the measurement point quantity of different depth; The end that bar and extension tube stretch into measured hole of extending is fixed with the cementation cartridge bag, extend bar and successively the cementation cartridge bag on the extension tube of suit arrange along bottom to the aperture sequence interval of monitoring holes, the axial location of each cementation cartridge bag is corresponding with the position of each measuring point in the measured hole, and the other end of extend bar and extension tube extends to the aperture of measured hole.Utilize survey instruments such as dial gauge, can be easily the end of the extend bar and the extension tube of position, aperture be measured, thereby measure the relative shift or the absolute displacement amount of extend bar and the pairing different depth of extension tube easily.
For the ease of better determining the position of cementation cartridge bag, extend bar and extension tube stretches into the fixedly chuck that a side of measured hole is set with, fixedly the external diameter of chuck is slightly less than the aperture of measured hole, makes it enter measured hole easily and does not interfere, and the cementation cartridge bag is arranged on fixedly chuck place.
Install for convenience, be convenient to sending into being adhesively fixed of the hole wall of being convenient to cementation cartridge bag and measured hole after extend bar or extension tube arrive desired location, the position that prevents cementation cartridge bag when installing is moved, on extend bar and extension tube, be set with the movable chuck that external diameter is slightly less than the aperture of measured hole, fixedly form the space that the cementation cartridge bag is installed between chuck and the movable chuck.Push movable chuck vertically by external force, can make things convenient on the hole wall that is fixed on measured hole accurately after the cementation cartridge bag is extruded.
For more convenient to install, fixedly chuck is arranged on the end of extend bar and extension tube, be provided with push pipe between the adjacent cementation cartridge bag, the push pipe sky is enclosed within on extend accordingly bar or the extension tube, and the two ends of push pipe contact with movable chuck with the fixedly chuck of adjacent cementation cartridge bag respectively.
The beneficial effects of the utility model are: after adopting technique scheme, the cartridge bag that can guarantee anchoring only acts on the position that need fix, the bar of extending forms with rock mass by the cementation cartridge bag with each extension tube and contacts than the firm of small size, the mode of this segmentation cementation, the loosening displacement of each degree of depth of tunnel surrounding is fully independently measured, the result who measures is accurate, reliably, reduced the influence of experimental apparatus itself to the rock displacement result, and the displacement monitoring of a plurality of different depths focused in the boring carry out, simplified the complicacy of execute-in-place greatly, the surrouding rock deformation that directly measures makes that measurement is more accurate.Have good environmental adaptability, simple to operate, measuring accuracy is high, cost is low, general personnel are slightly through instructing the characteristics just can operate.In the more abominable tunnel environment of execution conditions, can save time and workload, obtain the cooperation of unit in charge of construction easily.The protection of instrument also is very easy to, and the outside adds a little over cap, and area is very little, is not easy destroyedly, is particularly suitable for promoting the use of in the loosening deformation measurement of existing tunnel surrounding.
Description of drawings
Fig. 1 is the horizontal direction cross-sectional schematic of mounting structure of the present utility model.
Be labeled as among the figure: gauge head 1, extension tube 2, the bar 3 of extending, fixedly chuck 4, movable chuck 5, push pipe 6, jack 10, cementation cartridge bag 11, measured hole 20, bottom 21, aperture 22.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
As shown in Figure 1, sleeve bore multidot tensiometer of the present utility model, comprise extend bar 3 and the empty extension tube of one deck at least 2 that is enclosed within on the bar 3 of extending, extend bar 3 and extension tube 2 is delivered to the transmission bar that 22 places, aperture are measured as the deflection with respective depth in the measured hole 20, and extension tube 2 skies are enclosed within can make its influence of moving the bar 3 of not extended vertically on the bar 3 of extending; Same reason also is mutual empty cover between the multilayer extension tube 2, and promptly large diameter extension tube 2 skies are enclosed within on the extension tube 2 of minor diameter, makes its moving axially each other unaffected.The degree of depth of length of bar 3 of extending and measured hole 20 is suitable, and the end that extend bar 3 and extension tube 2 stretch into measured hole 20 is fixed with cementation cartridge bag 11, and cementation cartridge bag 11 can adopt the usual anchoring agent of adopting (anchoring cartridge bag) in the rock bolting engineering.Extend bar 3 and successively the cementation cartridge bag 11 on the extension tube 2 of suit arrange along bottom 21 to aperture 22 sequence interval of monitoring holes 20, make the axial location of its each cementation cartridge bag 11 corresponding during installation with the position of measured hole 20 interior each measuring points.The other end of bar 3 and extension tube 2 of extending extends to the aperture 22 of measured hole 20, be convenient to install the back by measurement to extend bar 3 and extension tube 2 ends, measurement can adopt electronics dial gauge etc. to carry out, survey the displacement of reading country rock by extend the stretching of top of bar 3 and extension tube 2 of survey, realize measurement the loosening deflection of different depth in the tunnel surrounding.
In order to guarantee when mounted cementation cartridge bag 11 to be fixed on the accurate position in the measured hole 20, a side that stretches into measured hole 20 at extend bar 3 and extension tube 2 is set with fixedly chuck 4, fixedly the external diameter of chuck 4 is slightly less than the aperture of measured hole 20, and cementation cartridge bag 11 is arranged on fixedly chuck 4 places.Fixedly chuck 4 plays the effect of the position of location cementation cartridge bag 11, during installation, with external force push cementation cartridge bag 11 allow itself and fixedly chuck 4 be adjacent to and get final product.
Install for convenience, extend and be set with the movable chuck 5 that external diameter is slightly less than the aperture of measured hole 20 on bar 3 and the extension tube 2, movable chuck 5 also is that sky is enclosed within on extend accordingly bar 3 or the extension tube 2, fixedly forms the space that cementation cartridge bag 11 is installed between chuck 4 and the movable chuck 5.During installation, push on the inwall that presses to measured hole 20 that movable chuck 5 can be an amount of with cementation cartridge bag 11, make on its inwall that well cements in measured hole 20 with external force.
In order to reduce installation procedure, better convenient the installation, fixing chuck 4 can be fixed on the end of extend bar 3 and extension tube 2, be provided with push pipe 6 between the adjacent cementation cartridge bag 11, push pipe 6 skies are enclosed within on extend accordingly bar 3 or the extension tube 2, and the two ends of push pipe 6 contact with movable chuck 5 with the fixedly chuck 4 of adjacent cementation cartridge bag 11 respectively.Like this, when mounted, the extension tube of installing later 2 can utilize its end when packing into decides chuck 4 together, movable chuck 5 on extend bar 3 or the extension tube 2 that 6 extruding of promotion push pipe are installed previously pushes cementation cartridge bag 11, makes its cementation cartridge bag 11 accurate and fixed with the bonding location of the hole wall of measured hole 20.
Measure for convenience and convenient the making, reduce cost of manufacture, the end group that extend bar 3 and extension tube 2 extend the aperture 22 of measured hole 20 originally flushes, and the length of extend bar 3 and extension tube 2 is corresponding with each measuring point degree of depth in the measured hole 20.
For the accuracy that guarantees to measure, can fixedly mount gauge head 1 in 22 places in the aperture, the outer face of gauge head 1 is provided with jack 10, the aperture of jack 10 is less than the diameter of the bar 3 of extending of correspondence and the pipe thickness of extension tube 2, when using dial gauge etc. to measure, can guarantee not take place to be offset like this, thereby guarantee the accuracy of its measurement.
Sleeve bore multidot tensiometer of the present utility model utilizes the more stable characteristics of temperature in the wall boring of hole, tunnel, and main raw material(s) adopts the material that must use in the constructing tunnel, can greatly reduce the measurement cost.The bar 3 of extending can adopt reinforcement fabrication, and extension tube 2 can adopt steel pipe manufacturing, and push pipe 6 can adopt the PVC plastic tube to make.
Foregoing empty cover, be meant its extension tube 2, the external diameter of the bar 3 of extending is approximately less than the extension tube 2 of suit on it, the internal diameter of push pipe 6, make extension tube 2, the push pipe 6 of its suit on it radially obtain certain support, not retrained by it, thereby with each adhesive spots of the extension tube 2 and the bar 3 of extending all with the rock mass secure bond, better the deep deformation of rock is guided to the outside and is measured.
As from the foregoing, as extend bar 3 and the extension tube 2 that transmit bar, except end points with country rock firmly contacts, other parts all are to move freely among a small circle in the axial direction.The push pipe 6 that pvc pipe is made both can guarantee that the position of anchor point was projected depth just, can effectively reduce again to transmit contacting of bar and hole wall, reduced the influence of frictional resistance to measurement result.
Claims (5)
1, sleeve bore multidot tensiometer, it is characterized in that: comprise that bar of extending (3) and sky are enclosed within the extension tube of one deck at least (2) on the bar of extending (3), the end that bar (3) and extension tube (2) stretch into measured hole (20) of extending is fixed with cementation cartridge bag (11), extend bar (3) and successively the cementation cartridge bag (11) on the extension tube of suit (2) along the bottom (21) of monitoring holes (20) to the aperture (22) sequence interval arrange, the axial location of each cementation cartridge bag (11) is corresponding with the position of each measuring point in the measured hole (20), and the other end of bar of extending (3) and extension tube (2) extends to the aperture (22) of measured hole (20).
2, sleeve bore multidot tensiometer as claimed in claim 1, it is characterized in that: the end that bar of extending (3) and extension tube (2) stretch into measured hole (20) is set with fixedly chuck (4), fixedly the external diameter of chuck (4) is slightly less than the aperture of measured hole (20), and cementation cartridge bag (11) is arranged on fixedly chuck (4) and locates.
3, sleeve bore multidot tensiometer as claimed in claim 2, it is characterized in that: be set with the movable chuck (5) that external diameter is slightly less than the aperture of measured hole (20) on bar of extending (3) and the extension tube (2), fixedly form the space that cementation cartridge bag (11) is installed between chuck (4) and the movable chuck (5).
4, sleeve bore multidot tensiometer as claimed in claim 3, it is characterized in that: fixedly chuck (4) is arranged on the end of bar of extending (3) and extension tube (2), be provided with push pipe (6) between the adjacent cementation cartridge bag (11), push pipe (6) sky is enclosed within on bar of extending accordingly (3) or the extension tube (2), and the two ends of push pipe (6) contact with movable chuck (5) with the fixedly chuck (4) of adjacent cementation cartridge bag (11) respectively.
5, according to any described sleeve bore multidot tensiometer of claim in the claim 1～4, it is characterized in that: the end group that bar of extending (3) and extension tube (2) extend the aperture (22) of measured hole (20) originally flushes, and the length of bar of extending (3) and extension tube (2) is corresponding with each measuring point degree of depth in the measured hole (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620036487XU CN200989770Y (en) | 2006-11-30 | 2006-11-30 | Sleeve type hole drilling multipoint extension meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620036487XU CN200989770Y (en) | 2006-11-30 | 2006-11-30 | Sleeve type hole drilling multipoint extension meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200989770Y true CN200989770Y (en) | 2007-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200620036487XU Expired - Lifetime CN200989770Y (en) | 2006-11-30 | 2006-11-30 | Sleeve type hole drilling multipoint extension meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200989770Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100535584C (en) * | 2006-11-29 | 2009-09-02 | 成都理工大学 | Sleeved multi-point drilling extender |
| CN103925004A (en) * | 2014-03-04 | 2014-07-16 | 中国矿业大学(北京) | Precision deformation monitoring method for surrounding rock of roadway |
-
2006
- 2006-11-30 CN CNU200620036487XU patent/CN200989770Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100535584C (en) * | 2006-11-29 | 2009-09-02 | 成都理工大学 | Sleeved multi-point drilling extender |
| CN103925004A (en) * | 2014-03-04 | 2014-07-16 | 中国矿业大学(北京) | Precision deformation monitoring method for surrounding rock of roadway |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |