CN212454399U - Sleeve type ground stress test matching positioning and ranging device - Google Patents
Sleeve type ground stress test matching positioning and ranging device Download PDFInfo
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- CN212454399U CN212454399U CN202020514008.0U CN202020514008U CN212454399U CN 212454399 U CN212454399 U CN 212454399U CN 202020514008 U CN202020514008 U CN 202020514008U CN 212454399 U CN212454399 U CN 212454399U
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Abstract
The utility model discloses a bushing type ground stress test matching positioning distance measuring device, relating to the technical field of ground stress test of tunnel engineering; the device comprises a drilling machine, a directional drill bit, a drill rod, a core drill bit, a hollow inclusion stressometer, a hole protecting sleeve and a laser ranging device; the hole protecting casing comprises a first casing and a second casing in descending order of the casings, an end part snap ring is arranged at the connecting end part of the first casing close to the second casing, the inner diameter of the end part snap ring is matched with the outer diameter of the second casing, and a positioning clamp is arranged on the annular surface of the end part snap ring, so that when the second casing is pushed into the end part snap ring, the free end of the positioning clamp is jacked open and extends towards the outer side of the hole protecting casing to clamp the wall of a drill hole by means of supporting force; through implementing this technical scheme, can effectively solve prior art and can't realize the technical problem of the long-time repeated country rock stress monitoring of same survey hole, improve drilling pore-forming efficiency and utilize it repeatedly, reduce stress test cost, have better popularization potentiality.
Description
Technical Field
The utility model relates to a tunnel engineering ground stress test technical field, more specifically say, relate to a supporting location range unit of bushing type ground stress test.
Background
The size and the distribution rule of the ground stress are important parameters of underground engineering structure design, deformation and damage causes of surrounding rocks and supporting structures and other geological disaster analysis, currently, an indirect test method such as a hollow inclusion stress relief method and a hydraulic fracturing method is mainly adopted for the ground stress test, but for complex geological environment and surrounding rock joint crack development, the technical problem that hole forming is difficult or hole collapse is easily caused after hole forming often exists, and the subsequent ground stress test is influenced; particularly for relatively weak and broken surrounding rocks or deeply-buried high ground stress areas, even the risk of collapse while drilling exists, so that the hole forming cost is increased, and the hole forming efficiency of drilling is influenced. The drilling of the ground stress test is the primary link of the stress test, and the traditional stress test has the problem of' although the test is carried out, and the test and the utilization of the same drill hole for multiple times cannot be realized; furthermore, in the process of underground engineering structure construction, the stress state of the underground engineering rock mass cannot be regularly tested and analyzed, so that the design of the supporting structure is more in the theoretical analysis stage, and a large amount of reliable and scientific data support is lacked.
Therefore, in view of the above technical problems, it is highly desirable for those skilled in the art to devise a device/method for testing ground stress, so as to provide a test means that can be repeatedly used for the same test point and the same test hole; particularly, the technical problem that the stress monitoring of the surrounding rock of the same measuring hole repeated for a long time cannot be realized due to the problems that the hole forming of the ground stress drilling is difficult, the exposed surrounding rock drilling is easy to collapse and block and the like caused by stress disturbance in the construction process is solved.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem that above-mentioned current hollow inclusion stress test exists, the utility model aims to provide a supporting location range unit of bushing type ground stress test, its aim at can effectively realize carrying out repetitious usage to same ground stress test drilling, especially to the high ground stress and the open loose complicated geological environment who easily breaks up country rock drilling and very easily collapses, can effectively solve the current technological problem that can't realize the long-time repeated country rock stress monitoring of same survey hole, improve drilling pore-forming efficiency, reduce the stress test cost, fine application prospect and practical value have.
The utility model adopts the technical scheme as follows:
a bushing type ground stress test matching positioning distance measuring device comprises a drilling machine, a directional drill bit, a drill rod, a core drill bit, a hollow inclusion stressometer, a hole protecting bushing and a laser distance measuring device for detecting the propelling depth of the drilling machine;
the hole protecting casing comprises a first casing and a second casing according to the sequence of casing lowering, the first casing is close to a connecting end portion of the second casing is provided with a end portion clamping ring, the inner diameter of the end portion clamping ring is matched with the outer diameter of the second casing, a positioning clamp is arranged on the annular surface of the end portion clamping ring and close to one end, pushed by the second casing, of the second casing and connected with the end portion clamping ring, the other end of the positioning clamp extends towards one direction of the casing, so that the second casing is pushed into the end portion clamping ring, the free end of the positioning clamp is jacked open and extends towards the outer side of the hole protecting casing to support a strong force to clamp a drilling wall.
Preferably, the end retainer ring is welded to an end of the sleeve and has an arcuate transition surface at the weld.
Preferably, at least three mounting through holes for mounting the positioning clips are formed in the annular surface of the end clamping ring, and the mounting through holes extend from the end surface of the end clamping ring to the arc-shaped transition surface along the axial direction of the end clamping ring.
As the preferred scheme, four positioning clamps are arranged on each end clamping ring, and the four positioning clamps are respectively installed in the installation through holes and are uniformly distributed along the annular surface of the end clamping ring.
Preferably, one end of the positioning clamp connected with the end clamping ring is fixedly installed in the installation through hole of the end clamping ring through a bolt.
Preferably, the positioning clamp is of an inverted tooth-shaped structure along the pushing direction of the second sleeve.
On the other hand, an object of the utility model is to provide a supporting location range unit of bushing type ground stress test, its two aims at considering hollow inclusion drilling stress and removing the in-process, need remove the difficult problem that the drill bit propulsion distance carries out real-time tracking to stress, for reducing the error that the tradition people exists in the range finding regularly, add drilling rod propulsion degree of depth laser location range unit, realize the automatic acquisition to the distance of creeping into, guarantee to be consistent with country rock strain data acquisition time interval, improve the data acquisition precision, reduce the human cost simultaneously.
Preferably, the laser ranging device comprises two laser diodes and two position sensitive detectors, wherein one position sensitive detector and the laser diode are respectively arranged at the support end of the large arm of the drilling machine, and the other position sensitive detector and the laser diode are arranged at the push end of the drill rod and synchronously pushed along with the drilling machine; the laser ranging device data acquisition period is configured to be consistent with the hollow inclusion stressometer data acquisition period.
As a preferred scheme, the drilling machine further comprises a mobile terminal and an alarm connected with the mobile terminal, wherein the laser diode and the position sensitive detector are respectively connected with the mobile terminal so that the mobile terminal sends an instruction to trigger the laser diode to send a light beam signal, the position sensitive detector feeds back the collected position signal to the mobile terminal, and the mobile terminal performs data processing on the position signal and calculates to obtain the drilling machine propulsion depth; and the drilling machine propelling depth is preset through the mobile terminal, so that the mobile terminal sends a command of stopping propelling to the drilling machine and sends an alarm command to the alarm after the preset depth is reached.
As described above, the present invention has at least the following advantages over the prior art:
1. the utility model provides an earth stress testing device is provided with a hole-protecting sleeve, and a positioning card designed by matching with a snap ring at the end part of the hole-protecting sleeve can effectively jack the positioning card and make the positioning card prop a strong drilling wall after the hole-protecting sleeve is installed, and aims at solving the problems that the drilling of high earth stress and exposed loose easily-broken surrounding rock is difficult to form, and the drilling is easy to collapse and block in a complex geological environment; the device can realize the same measuring point and the same measuring hole, can repeatedly carry out the test of multiple utilization, improves the drilling and hole forming efficiency, reduces the stress test cost, and has good application prospect and practical value.
2. The utility model can effectively protect the test drill hole by erecting the hole protection sleeve on the ground stress test drill hole, and prevent the test drill hole from collapsing and blocking; meanwhile, the hole protecting sleeve is convenient to install and operate, the positioning clamp is firm and stable in supporting, the hole protecting sleeve can be repeatedly utilized, the ground stress test drilling hole does not need to be drilled again, the rock stress state at different depths can be measured and the rock stress distribution rule can be analyzed by extending the hole protecting sleeve on the basis of the original test drilling hole.
3. As the utility model discloses preferred scheme, the supporting laser rangefinder that is provided with, the in-process is relieved to hollow inclusion drilling stress of having fully considered, need relieve the stress that the drill bit impels the difficult problem that the distance carries out real-time tracking, for reducing the error that the tradition is artificial to exist in regularly finding range, add the drilling rod and impel degree of depth laser positioning rangefinder, realize the automatic acquisition to creeping into the distance, guarantee to be unanimous with the wall rock strain data acquisition time interval, improve the data acquisition precision, reduce the human cost simultaneously.
Drawings
The invention will be described by way of example only and with reference to the accompanying drawings, in which
Fig. 1 shows a schematic view of a grommet prior to splicing according to an exemplary embodiment of the present invention;
FIG. 2 shows a schematic view of the end snap ring of FIG. 1 of a grommet according to an exemplary embodiment of the present invention;
fig. 3 shows a schematic view of a grommet after splicing according to an exemplary embodiment of the present invention;
fig. 4 shows a schematic view of the locator card being stuck to the borehole wall after the casing is lowered in accordance with an exemplary embodiment of the present invention.
Description of reference numerals: 1-a first sleeve; 2-end snap ring; 21-mounting a through hole; 22-an arc-shaped transition surface; 3, positioning a card; 4-sleeve II; 5-borehole wall.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Example one
The first exemplary embodiment of the present invention is substantially as shown in fig. 1 to 4: the embodiment provides a bushing type ground stress test matching positioning and ranging device which is applied to a complex geological environment with high ground stress and exposed, loose and easily broken surrounding rock drill holes and easily collapsing; the device comprises a drilling machine, a directional drill bit, a drill rod, a core drill bit, a hollow inclusion drill bit and a hollow inclusion stressometer, and also comprises a hole protection sleeve and a laser ranging device for detecting the propelling depth of the drilling machine, wherein the laser ranging device in the embodiment can adopt a laser ranging device in the prior art, the specific structure and the ranging principle of the laser ranging device are the prior art and are not the invention points of the disclosure, and therefore, the detailed description is not repeated; specifically, the hole protecting casing comprises a first casing 1 and a second casing 4 according to the sequence of casing lowering, a first end clamping ring 2 is arranged at the connecting end part of the first casing 1 close to the second casing 4, the inner diameter of the end clamping ring 2 is matched with the outer diameter of the second casing 4, a positioning clamp 3 is arranged on the annular surface of the end clamping ring 2, one end of the positioning clamp 3 pushed into the second casing 4 is connected with the end clamping ring 2, the other end of the positioning clamp 3 freely extends towards the first casing 1, so that when the second casing 4 is pushed into the end clamping ring 2, the free end of the positioning clamp 3 is jacked open and extends towards the outer side of the hole protecting casing, and a drilling wall 5 is clamped by a supporting force.
As a preferable scheme of the embodiment, the diameter of the end part clamping ring 2 is larger than that of the first casing pipe 1, and the end part clamping ring is used for connecting a second subsequent casing pipe 4; the end part clamping ring 2 is welded with the end part of the sleeve I1, and an arc-shaped transition surface 22 is arranged at the welding position; as shown in fig. 2, at least three mounting through holes 21 for mounting the positioning clips 3 are formed in the annular surface of the end portion snap ring 2, the mounting through holes 21 are matched with the positioning clips 3 in size, in this embodiment, 4 mounting through holes 21 are provided as an example, so that four positioning clips 3 are arranged on each end portion snap ring 2, the mounting through holes 21 extend from the end surface of the end portion snap ring 2 to the arc-shaped transition surface 22 along the axial direction of the end portion snap ring 2, and the four positioning clips 3 are respectively mounted in the mounting through holes 21 and are uniformly distributed along the annular surface of the end portion snap ring 2; further, the one end that locator card 3 and tip snap ring 2 are connected is passed through bolt fixed mounting in the installation through-hole 21 of tip snap ring 2 for locator card 3 forms swing joint and is connected stably with tip snap ring 2, and it extends to the hole protection sleeve pipe outside to push away locator card 3 behind the casing two 4 of transferring for prop strength and block borehole wall 5.
As shown in fig. 3, in order to make the locator card 3 have a better supporting effect on the borehole wall 5 after being pushed open, the locator card 3 provided in this embodiment is in an inverted tooth-shaped structure along the pushing direction of the second casing 4, and the thickness of the locator card 3 from the connecting end to the free end is gradually reduced, and the end portion close to the free end has a slope extending to the outer side of the borehole protection casing, so that the locator card is gradually pushed open to gradually support the borehole wall 5 in the subsequent pushing process of the second casing 4, thereby having better positioning stability.
As shown in fig. 4, the stress testing device provided in this embodiment is capable of effectively ejecting the locator card 3 and making it to stretch the borehole wall 5 after the hole protection sleeve is installed, so as to solve the problems of difficult hole formation, easy collapse and blockage of the borehole of the geostress borehole in the complex geological environment with high geostress and exposed and loose easy-to-break surrounding rock borehole; can realize same measurement station, same survey hole, can relapse a lot of utilization and carry out hollow inclusion stress test, need not to punch again and establish ground stress test drilling, only need on original test drilling's basis, extend it and can realize the survey of different degree of depth rock mass stress state, analysis rock mass stress distribution law has fine application prospect and practical value.
Example two
The second embodiment is substantially the same as the first embodiment, except that: the embodiment provides a sleeve type positioning and ranging device matched with an earth stress test, which considers the difficult problem that the push distance of a stress relieving drill bit needs to be tracked in real time in the process of relieving the drilling stress of a hollow bag body, and is additionally provided with a drill rod push depth laser ranging device for reducing errors in the traditional manual timing ranging, wherein the laser ranging device comprises two laser diodes and two position sensitive detectors, the two laser diodes and the position sensitive detectors adopt the laser diodes and the position sensitive detectors in the prior art, the specific structure and the realization principle of the laser ranging device are the prior art, and the laser ranging device is not the invention point of the disclosure, so the detailed description is not needed herein; one position sensitive detector and one laser diode are respectively arranged at the support end of the large arm of the drilling machine, and the other position sensitive detector and the other laser diode are arranged at the push end of the drill rod and synchronously pushed along with the drilling machine; the data acquisition period of the laser ranging device is configured to be consistent with the data acquisition period of the stress meter of the hollow bag body; in order to realize automatic acquisition of strain data and synchronous acquisition of drilling depth data of the drilling machine, the embodiment also provides a mobile terminal and an alarm connected with the mobile terminal, wherein a laser diode and a position sensitive detector are respectively connected with the mobile terminal so that the mobile terminal sends an instruction to trigger the laser diode to send out a light beam signal, the position sensitive detector feeds back the acquired position signal to the mobile terminal, and the mobile terminal performs data processing on the position signal and calculates to obtain the propelling depth of the drilling machine; and the drilling machine propelling depth is preset through the mobile terminal, so that the mobile terminal sends a command of stopping propelling to the drilling machine and sends an alarm command to the alarm after the preset depth is reached, and further the hollow casing stress meter is used for collecting surrounding rock stress data of the drilling depth.
The bushing type ground stress test matching positioning distance measuring device can effectively achieve automatic acquisition of drilling distance, guarantees that the time interval of the acquisition of the surrounding rock strain data is consistent, improves the data acquisition precision, reduces the labor cost, and has a better detection effect in practical application.
On the other hand, the embodiment further provides a sleeve-type ground stress test method, which performs a test by using the sleeve-type ground stress test matching positioning distance measuring device, and the test method includes the following steps:
s1, selecting a place with good lithology suitable for the ground stress test, pushing the drill bit and the drill rod by using a drilling machine, and drilling a ground stress test borehole;
s2, in the step S1, the drilling machine is pushed to reach a preset distance, and the drill bit is withdrawn from the drill rod;
s3, lowering hole-protecting sleeves from the tail end of the drill rod to enable the sleeves to penetrate through the drill rod one by one to reach a set depth;
s4, slowly retreating the drill rod, and pushing the hole-protecting sleeve out of the drill rod;
s5, pushing the corresponding second casing 4 in the hole-protecting casing into the end part snap ring 2 of the first casing 1 by using external force, and simultaneously jacking the free end of the positioning clip 3 to extend towards the outer side of the hole-protecting casing so as to clamp the wall 5 of the drill hole by using a supporting force and finish the lowering of the hole-protecting casing;
s6, drilling a hollow inclusion hole, replacing a drill rod and a hollow inclusion drill bit with the diameter smaller than the inner diameter of the casing pipe to enable the drill rod and the hollow inclusion drill bit to penetrate into the casing pipe to reach a set hole forming depth, and withdrawing the hollow inclusion drill bit and the drill rod;
s7, delivering a hollow inclusion stressometer in the hollow inclusion drill hole;
s8, replacing the coring bit, wherein the diameter of the coring bit is larger than the diameter of the hole formed by the hollow inclusion and smaller than the inner diameter of the hole protecting sleeve;
and S9, relieving the stress of the hollow inclusion, and collecting stress change data of the surrounding rock.
According to the test method, the hole protection sleeve is erected on the ground stress test drill hole, so that the test drill hole can be effectively protected, and collapse and blockage of the test drill hole are prevented; meanwhile, the test drill hole can be repeatedly utilized, the ground stress test drill hole does not need to be drilled again, the test drill hole is extended on the basis of the original test drill hole, the stress state of rock masses at different depths can be measured, the rock mass stress distribution rule is analyzed, and the test drill hole has good application prospect and practical value and is suitable for popularization and application.
In step S9, the laser ranging device is used to collect drilling data of the drilling machine, the obtained drilling data is fed back to the mobile terminal, the drilling distance of the drilling machine is recorded, and the data collection period of the hollow inclusion stress meter is made to be consistent with the position information collection period of the laser ranging device. Therefore, the propelling distance can be effectively prevented from being frequently measured manually, the labor cost is reduced, the drilling depth of the drilling machine can be automatically acquired, the strain data acquisition time interval of the drilling machine and the surrounding rock is consistent, the problem that errors exist in artificial timing distance measurement is avoided, and the propelling distance of the drill bit is tracked in real time when the stress of the hollow inclusion is relieved.
The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, the protection scope of the present invention is defined by the claims, and all structural changes equivalent to the description and drawings of the present invention should be covered by the protection scope of the present invention.
Claims (7)
1. The utility model provides a supporting location range unit of sleeve type ground stress test, includes rig, directional drill bit, drilling rod, coring bit, hollow inclusion drill bit and hollow inclusion stressometer, its characterized in that: the drilling machine also comprises a hole protecting sleeve and a laser ranging device for detecting the advancing depth of the drilling machine;
the hole protecting casing comprises a first casing and a second casing according to the sequence of casing lowering, the first casing is close to a connecting end portion of the second casing is provided with a end portion clamping ring, the inner diameter of the end portion clamping ring is matched with the outer diameter of the second casing, a positioning clamp is arranged on the annular surface of the end portion clamping ring and close to one end, pushed by the second casing, of the second casing and connected with the end portion clamping ring, the other end of the positioning clamp extends towards one direction of the casing, so that the second casing is pushed into the end portion clamping ring, the free end of the positioning clamp is jacked open and extends towards the outer side of the hole protecting casing to support a strong force to clamp a drilling wall.
2. The bushing-type ground stress test matching positioning and ranging device as recited in claim 1, wherein: the end clamping ring is welded with one end of the sleeve, and an arc-shaped transition surface is arranged at the welding position.
3. The bushing-type ground stress test matching positioning and ranging device as recited in claim 2, wherein: at least three mounting through holes for mounting the positioning cards are formed in the annular surface of the end clamping ring, and the mounting through holes extend from the end surface of the end clamping ring to the arc-shaped transition surface along the axial direction of the end clamping ring.
4. The bushing-type ground stress test matching positioning and ranging device as recited in claim 3, wherein: four positioning clamps are arranged on each end clamping ring and are respectively arranged in the mounting through holes and are uniformly distributed along the annular surface of each end clamping ring.
5. The bushing-type ground stress test matching positioning and ranging device as recited in claim 4, wherein: and one end of the positioning clamp connected with the end part clamping ring is fixedly arranged in the mounting through hole of the end part clamping ring through a bolt.
6. The telescopic ground stress test matching positioning and ranging device as claimed in any one of claims 1 to 5, wherein: the positioning clamp is of an inverted tooth-shaped structure along the pushing-in direction of the second sleeve.
7. The bushing-type ground stress test matching positioning and ranging device as recited in claim 1, wherein: the laser ranging device comprises two laser diodes and two position sensitive detectors, wherein one position sensitive detector and the laser diode are respectively arranged at the supporting end of the large arm of the drilling machine, and the other position sensitive detector and the laser diode are arranged at the pushing end of the drill rod and are synchronously pushed along with the drilling machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020514008.0U CN212454399U (en) | 2020-04-09 | 2020-04-09 | Sleeve type ground stress test matching positioning and ranging device |
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| CN202020514008.0U CN212454399U (en) | 2020-04-09 | 2020-04-09 | Sleeve type ground stress test matching positioning and ranging device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820059A (en) * | 2021-10-20 | 2021-12-21 | 辽宁工程技术大学 | Earth stress measurement hollow inclusion positioning device and using method |
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2020
- 2020-04-09 CN CN202020514008.0U patent/CN212454399U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113820059A (en) * | 2021-10-20 | 2021-12-21 | 辽宁工程技术大学 | Earth stress measurement hollow inclusion positioning device and using method |
| CN113820059B (en) * | 2021-10-20 | 2024-01-05 | 辽宁工程技术大学 | Positioning device for hollow inclusion for ground stress measurement and use method |
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