CN114136255B - Measuring point self-locking structure and multi-point displacement meter with same - Google Patents
Measuring point self-locking structure and multi-point displacement meter with same Download PDFInfo
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- CN114136255B CN114136255B CN202111440582.1A CN202111440582A CN114136255B CN 114136255 B CN114136255 B CN 114136255B CN 202111440582 A CN202111440582 A CN 202111440582A CN 114136255 B CN114136255 B CN 114136255B
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- transmission rod
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 41
- 238000004873 anchoring Methods 0.000 claims abstract description 40
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims abstract description 8
- 230000009471 action Effects 0.000 claims abstract description 4
- 238000007711 solidification Methods 0.000 claims abstract description 4
- 230000008023 solidification Effects 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 22
- 239000011435 rock Substances 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
Classifications
-
- 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
- G01B21/02—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 length, width, or thickness
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention relates to a measuring point self-locking structure and a multipoint displacement meter with the same, belonging to the technical field of deep displacement testing of surrounding rocks in tunnel engineering, and comprising a displacement transmission rod and an expansion ring sleeved at one end of the displacement transmission rod; the expansion ring comprises a cylindrical section and conical table sections which are oppositely arranged at two ends of the cylindrical section and the small ends of which face the cylindrical section, a plurality of expansion joints are formed in the circumferential direction of the conical table sections, expansion pushing blocks are arranged in the two conical table sections, anchoring agents are filled between the two expansion pushing blocks, and a plurality of anchoring agent overflow holes are formed in the circumferential surface of the cylindrical section; the expansion ring is provided with a limiting part and a pushing sleeve on two sides respectively, the pushing sleeve moves under the action of external force to enable the expansion pushing block to extrude the side wall of the conical section and the anchoring agent, the side wall of the conical section is expanded under the extrusion of the expansion pushing block to be locked with the wall of the anchoring hole, the anchoring agent overflows out of the expansion ring under the extrusion of the expansion pushing block to realize the solidification and anchoring of the anchoring agent, and further, the complex link of grouting is omitted, and the site installation is convenient and quick.
Description
Technical Field
The invention belongs to the technical field of tunnel engineering surrounding rock deep displacement testing, and relates to a measuring point self-locking structure and a multipoint displacement meter with the same.
Background
The deep displacement of the tunnel is a key technical parameter for knowing the mechanical response of tunnel construction, and a multipoint displacement meter is generally adopted for testing at present. The mounting quality of the multipoint displacement meter directly relates to the reliability of a test result, and the common practice is to fix a measuring point and a hole wall in a grouting mode so as to deform along with displacement, so that the grouting construction process is complex and tedious. In consideration of shrinkage characteristics of grouting materials, to ensure that the measuring points and the hole walls are fully anchored and cooperatively deformed, secondary grouting is usually required, and meanwhile, gas in the holes is completely removed. This is difficult to achieve and the quality of the installation is difficult to ensure.
Disclosure of Invention
In view of this, the purpose of this application is to provide a measurement station auto-lock structure and have this measurement station auto-lock structure's multiple spot displacement meter to save the complicated link of slip casting, make on-the-spot installation convenient and fast.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a measuring point self-locking structure comprises a displacement transmission rod and an expansion ring sleeved at one end of the displacement transmission rod; the expansion ring comprises a cylindrical section and conical table sections which are oppositely arranged at two ends of the cylindrical section and the small ends of which face the cylindrical section, a plurality of expansion joints are formed in the circumferential direction of the conical table sections, expansion pushing blocks are arranged in the two conical table sections, anchoring agents are filled between the two expansion pushing blocks, and a plurality of anchoring agent overflow holes are formed in the circumferential surface of the cylindrical section; one side of the expansion ring, which faces the end part of the displacement transmission rod, is provided with a limiting piece, the other side of the expansion ring is provided with a pushing sleeve in threaded connection with the displacement transmission rod, and one end of the pushing sleeve, which is close to the expansion pushing block, is provided with an annular structure so as to enlarge the contact area with the expansion pushing block; the pushing sleeve moves under the action of external force so that the expansion pushing block extrudes the side wall of the conical section and the anchoring agent, the side wall of the conical section expands under the extrusion of the expansion pushing block to be locked with the wall of the anchoring hole, and the anchoring agent overflows out of the expansion ring under the extrusion of the expansion pushing block to realize the solidification and anchoring of the anchoring agent.
Optionally, the expansion pushing block is of a frustum structure, the taper of the expansion pushing block is in the same direction as the taper of the corresponding frustum section, and the taper of the expansion pushing block is not larger than the taper of the expansion ring.
Optionally, the expansion pushing block is of a cylindrical structure.
Optionally, the expansion gaps are uniformly distributed on the circumferential surface of the conical section.
Optionally, the limiting piece is a nut or a baffle fixed at the end of the displacement transmission rod.
The multipoint displacement meter comprises a plurality of measuring point self-locking structures, wherein the measuring point self-locking structures are connected with a frequency meter through steel strings, and the measuring point self-locking structures are applied to the measuring point self-locking structures.
Optionally, the length of the displacement transmission rod and the length of the pushing sleeve of each measuring point self-locking structure are determined according to the test requirement.
The invention has the beneficial effects that: double locking and anchoring of the measuring points and surrounding rock are realized through the measuring point self-locking structure, complex links of grouting are omitted, site installation is convenient and quick, installation quality is easy to guarantee, reliable and effective monitoring data can be obtained, and reliability of a test result is improved.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a multi-point displacement meter according to the present invention;
fig. 2 is a schematic structural diagram of the self-locking structure of the measuring point.
Reference numerals: the expansion ring 1, the expansion push block 2, the cylindrical section 3, the push sleeve 4, the displacement transmission rod 5, the limiting piece 7, the anchoring agent overflow hole 8, the expansion joint 9, the hole wall 10, the frequency meter 11, the steel string 12 and the measuring point self-locking structure 13.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1-2, a measuring point self-locking structure 13 comprises a displacement transmission rod 5 and a hollow expansion ring 1 sleeved at one end of the displacement transmission rod; the expansion ring 1 comprises a cylindrical section 3 and frustum sections which are oppositely arranged at two ends of the cylindrical section and the small ends of which face the cylindrical section 3, a plurality of expansion gaps 9 are formed in the circumferential direction of the frustum sections, expansion pushing blocks 2 are arranged in the two frustum sections, anchoring agents are filled between the two expansion pushing blocks 2, and a plurality of anchoring agent overflow holes 8 are formed in the circumferential surface of the cylindrical section 3; one side of the expansion ring 1 facing the end part of the displacement transmission rod is provided with a limiting piece 7, the other side of the expansion ring is provided with a pushing sleeve 4 in threaded connection with the displacement transmission rod 5, the pushing sleeve 4 moves under the action of external force to enable the expansion pushing block 2 to extrude the side wall of the conical section and the anchoring agent, the side wall of the conical section stretches out under the extrusion of the expansion pushing block 2 to be locked with the anchoring hole wall 10, and the anchoring agent overflows out of the expansion ring 1 under the extrusion of the expansion pushing block 2 to realize anchoring agent solidification anchoring.
Optionally, the expansion pushing block 2 is in a frustum structure, and the taper of the expansion pushing block 2 is in the same direction as the taper of the corresponding frustum section, and the taper of the expansion pushing block 2 is not greater than the taper of the expansion ring 1.
Alternatively, the expansion push block 2 has a cylindrical structure.
Optionally, the expansion joints 9 are uniformly distributed on the circumferential surface of the conical section.
Optionally, the end of the push sleeve 4 near the expansion push block 2 has an annular structure to increase the contact area with the expansion push block 2.
Alternatively, the stopper 7 is a nut or a baffle fixed to the end of the displacement transmission rod 5.
The multipoint displacement meter comprises a plurality of measuring point self-locking structures 13, wherein the measuring point self-locking structures 13 are connected with a frequency meter 11 through steel strings 12, and the measuring point self-locking structures 13 are applied to the measuring point self-locking structures 13.
Optionally, the device comprises three measuring point self-locking structures: the first measuring point, the second measuring point and the third measuring point; the length of the displacement transmission rod and the length of the pushing sleeve of each measuring point self-locking structure 13 are determined according to the test requirements.
The working principle of the measuring point self-locking structure 13 of the invention is as follows: the expansion pushing sleeve 4 is rotated to drive the expansion pushing block 2 to move inwards, the frustum section of the expansion ring 1 expands, when the diameter of the frustum section of the expansion ring 1 is equal to the diameter of a drilled hole, the measuring point self-locking structure 13 is preliminarily locked with surrounding rock, simultaneously when the expansion pushing block 2 moves inwards, anchoring agent in the expansion ring 1 is extruded through the anchoring agent overflow hole 8 formed in the cavity wall of the cylindrical section and two end ports of the cylindrical section, the gap between the measuring point self-locking structure 13 and the hole wall 10 is filled, the gap is filled with the anchoring agent along with the continuous inward pushing of the expansion pushing block 2, the measuring point self-locking structure 13 and the surrounding rock are fully anchored after the anchoring agent is solidified, and the measuring point is fully fixed and can be deformed in cooperation with the surrounding rock of the hole wall. The structure and surrounding rock have double locking and anchoring: firstly, the frustum section of the expansion ring 1 is expanded and blocked; and secondly, the anchoring agent is solidified and anchored (the effect is equivalent to grouting).
The field installation method of the invention comprises the following steps: 1) Designing hole depths and measuring point numbers according to research requirements; 2) The number of the measuring point self-locking structures 13, the length of the pushing sleeve 4, the length of the displacement transmission rod 5, the anchoring dosage and the like are determined; 3) Drilling holes; 4) Assembling a multipoint displacement meter; 5) Fully loosening the expansion pushing block 2, and injecting anchoring agent into the expansion bag 3; 6) Pushing the pushing sleeve 4 to lock the anchoring point; 7) The test cable is reserved on the closed hole wall 10; 8) And (5) installing a collector to monitor.
The core of the invention is a measuring point self-locking structure 13 at the measuring point position, the anchoring of the measuring point and surrounding rock is realized through the measuring point self-locking structure 13, the complex link of grouting is omitted, after the measuring point self-locking structure 13 is locked, the surrounding rock moves to drive a displacement transmission rod 5 to move, so that the rigidity of a steel string 12 is changed, and the vibration frequency of the steel string 12 is changed, namely, the displacement of the surrounding rock at the measuring point can be measured through a frequency meter 11. The invention has the advantages of convenient and quick field installation, easy guarantee of installation quality, reliable and effective monitoring data acquisition and improvement of the reliability of test results.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (5)
1. A measuring point self-locking structure is characterized in that: comprises a displacement transmission rod and an expansion ring sleeved at one end of the displacement transmission rod; the expansion ring comprises a cylindrical section and conical table sections which are oppositely arranged at two ends of the cylindrical section and the small ends of which face the cylindrical section, a plurality of expansion joints are formed in the circumferential direction of the conical table sections, expansion pushing blocks are arranged in the two conical table sections, anchoring agents are filled between the two expansion pushing blocks, and a plurality of anchoring agent overflow holes are formed in the circumferential surface of the cylindrical section; one side of the expansion ring, which faces the end part of the displacement transmission rod, is provided with a limiting piece, the other side of the expansion ring is provided with a pushing sleeve in threaded connection with the displacement transmission rod, and one end of the pushing sleeve, which is close to the expansion pushing block, is provided with an annular structure so as to enlarge the contact area with the expansion pushing block; the pushing sleeve moves under the action of external force so that the expansion pushing block extrudes the side wall of the conical section and the anchoring agent, the side wall of the conical section expands under the extrusion of the expansion pushing block to be locked with the wall of the anchoring hole, and the anchoring agent overflows out of the expansion ring under the extrusion of the expansion pushing block to realize the solidification and anchoring of the anchoring agent; the expansion pushing block is of a frustum structure, the taper of the expansion pushing block is in the same direction as the taper of the corresponding frustum section, and the taper of the expansion pushing block is not larger than that of the expansion ring.
2. The station self-locking structure of claim 1, wherein: the expansion gaps are uniformly distributed on the circumferential surface of the conical section.
3. The station self-locking structure of claim 1, wherein: the limiting piece is a nut or a baffle plate fixed at the end part of the displacement transmission rod.
4. The utility model provides a multiple spot displacement meter, includes a plurality of measurement station auto-lock structures, and measurement station auto-lock structure passes through the steel string and links to each other with the frequency appearance, its characterized in that: the self-locking structure for measuring points is applied to the self-locking structure for measuring points according to any one of claims 1-3.
5. A multi-point displacement meter according to claim 4, wherein: the length of the displacement transmission rod and the length of the pushing sleeve of each measuring point self-locking structure are determined according to the test requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111440582.1A CN114136255B (en) | 2021-11-30 | 2021-11-30 | Measuring point self-locking structure and multi-point displacement meter with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111440582.1A CN114136255B (en) | 2021-11-30 | 2021-11-30 | Measuring point self-locking structure and multi-point displacement meter with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114136255A CN114136255A (en) | 2022-03-04 |
| CN114136255B true CN114136255B (en) | 2024-02-02 |
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| CN202111440582.1A Active CN114136255B (en) | 2021-11-30 | 2021-11-30 | Measuring point self-locking structure and multi-point displacement meter with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111576408A (en) * | 2020-06-09 | 2020-08-25 | 江苏景源万河环境科技有限公司 | Construction method of expanded head prestressed concrete anchor rod |
| CN216432888U (en) * | 2021-11-30 | 2022-05-03 | 重庆大学 | Measurement point self-locking structure and multipoint displacement meter with same |
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2021
- 2021-11-30 CN CN202111440582.1A patent/CN114136255B/en active Active
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| AT148328B (en) * | 1933-12-08 | 1937-01-11 | William Wilson Hamill | Anchoring for carrying or fastening objects to walls, floors, etc. |
| USRE31776E (en) * | 1977-09-21 | 1984-12-25 | The Eastern Company | Resin reinforced expansion anchor and method of installation |
| GB9612985D0 (en) * | 1995-06-24 | 1996-08-21 | Hilti Ag | Method of forming an achoring arrangement free from expansion pressure |
| CN101105387A (en) * | 2007-08-09 | 2008-01-16 | 中国科学院武汉岩土力学研究所 | Mechanical type multiple-point displacement gage |
| CN102809360A (en) * | 2012-08-14 | 2012-12-05 | 中国水电顾问集团中南勘测设计研究院 | Rod type coaxial multi-point displacement measuring device |
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| GB201807373D0 (en) * | 2018-05-04 | 2018-06-20 | Norwegian Univ Of Science And Technology | Rock bolts |
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| Publication number | Publication date |
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| CN114136255A (en) | 2022-03-04 |
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