CN212459180U - Exposed short anchor rod drawing experimental device - Google Patents
Exposed short anchor rod drawing experimental device Download PDFInfo
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- CN212459180U CN212459180U CN202020968774.4U CN202020968774U CN212459180U CN 212459180 U CN212459180 U CN 212459180U CN 202020968774 U CN202020968774 U CN 202020968774U CN 212459180 U CN212459180 U CN 212459180U
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- rod
- telescopic
- bearing plate
- anchor rod
- connecting part
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Abstract
An exposed short anchor rod drawing experimental device comprises an adjustable support and a drawing connecting piece; the adjustable support comprises a bearing plate, telescopic support legs are hinged to the lower end of the bearing plate, one end of each telescopic connecting rod is hinged to each telescopic support leg, the other end of each telescopic connecting rod is hinged to the bearing plate, and the bearing plate, the telescopic connecting rods and the telescopic support legs form a stable triangular structure; the drawing connecting piece comprises a left connecting part and a right connecting part, and the left connecting part and the right connecting part coat the pull rod and the anchor rod and are locked through bolts or U-shaped clamps. The utility model provides a pair of expose shorter stock and draw experimental apparatus, including support and connecting piece, can expose shorter stock to extend and draw the experiment under various topography conditions to can effectively guarantee the accuracy of test result.
Description
Technical Field
The utility model relates to a draw experimental facilities, especially an expose shorter stock and draw experimental apparatus.
Background
There are more factors to lead to the testing result to appear the deviation at the in-process of carrying out stock withdrawal resistance test, and wherein the most important reason is that cavity jack loading axis and stock axis appear the contained angle, lead to the testing result always to be greater than the actual axial atress of stock, and the contained angle is big more, and the result deviation is also big more. The main causes of such deviations are: 1) the self inclination angle of the anchor rod uplift force test device is variable, and the inclination angle is within almost 360 ranges of upward inclination, downward inclination, horizontal and vertical; 2) the anchor rods are positioned at different positions and have different forms such as a slope surface, a chamber side wall, a top arch and the like; 3) the exposed surface has various conditions, and the exposed surface has original soil texture, weathered stone and stone side slope which are just excavated, and the concrete surface is sprayed.
The method adopted at present is that a steel backing plate is firstly placed before a hollow jack of an anchor rod drawing instrument is installed, the bearing capacity of an exposed surface in the anchor rod loading process is increased, and the influence of local deformation is reduced.
In addition, in order to ensure the long-term service function of stock in the stock design, the stock design at some positions exposes often shorter, needs to cover completely after the later stage structure construction to prevent that the stock from exposing for a long time and causing the corrosion, but too short exposes and can't install the stock and draw the appearance when leading to stock withdrawal resistance to test, consequently just need the extension, and present general way mainly has two: one is that: welding a lengthened steel bar with the same type on the short exposed part in a rib welding mode for carrying out a drawing test, and cutting off the welded part after the test is finished, wherein the defects that the on-site welding construction environment condition is limited, the welding process quality cannot be guaranteed, the axial coincidence of the lengthened part and the anchor rod body cannot be guaranteed, and the welded part needs to be cut off after the test is finished are mainly overcome, so that the construction difficulty is large, the quality cannot be guaranteed, and the labor and the time are wasted; the second method is as follows: the method has the main disadvantages that in order to ensure the principle of random selective inspection, all the exposed ends of the anchor rods must be subjected to thread rolling processing, one anchor rod processing procedure and the preparation of matched equipment are added, and the larger labor and equipment cost is caused. In conclusion, both welding and sleeve connection inevitably cause cost increase, and the accuracy of the test result is also influenced to a certain extent.
Disclosure of Invention
The utility model aims to solve the technical problem that a expose shorter stock and draw experimental apparatus is provided, to the stock design at some positions expose the shorter condition, need not increase the purpose that any extra processing can realize extension stock, and can effectively guarantee the accuracy of test result.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
an exposed short anchor rod drawing experimental device comprises an adjustable support and a drawing connecting piece;
the adjustable support comprises a bearing plate, telescopic support legs are hinged to the lower end of the bearing plate, one end of each telescopic connecting rod is hinged to each telescopic support leg, the other end of each telescopic connecting rod is hinged to the bearing plate, and the bearing plate, the telescopic connecting rods and the telescopic support legs form a stable triangular structure;
the drawing connecting piece comprises a left connecting part and a right connecting part, and the left connecting part and the right connecting part coat the pull rod and the anchor rod and are locked through bolts or U-shaped clamps.
The bearing plate center is equipped with the through-hole, and funnel-shaped guide cylinder is installed with the through-hole coaxial center to bearing plate lower extreme.
The telescopic supporting leg comprises a lower threaded rod and an upper threaded sleeve, and the lower threaded rod and the upper threaded sleeve are in threaded connection.
And the lower threaded rod is hinged with a base plate.
The telescopic connecting rod comprises a first threaded rod and a second threaded rod, and the rotating directions of the first threaded rod and the second threaded rod are opposite and are in threaded connection with the first threaded sleeve.
The funnel-shaped guide cylinder is perpendicular to the bearing plate.
The inner walls of the left connecting part and the right connecting part are uniformly provided with a plurality of crescent grooves along the length direction, and the crescent grooves are matched with crescent ribs on the anchor rod (meeting the requirement of the 2 nd part of steel for GB/T1499.2-2018 reinforced concrete: hot rolled ribbed steel).
The utility model relates to an expose shorter stock and draw experimental apparatus has following technological effect:
1) through setting up loading board, guide cylinder, the loading board is perpendicular with the guide cylinder, and after later stage installation, loading plane is mutually perpendicular with the stock axis like this, makes cavity jack loading axis parallel with the stock axis, and the more real reflection stock quality situation of testing result can greatly reduce experimental deviation.
2) By arranging the telescopic connecting rods and the telescopic supporting legs, the position where the anchor rod is located can be adjusted according to different positions, the situation that after the anchor rod is installed is guaranteed, the loading plane is perpendicular to the axis of the anchor rod, the adjusting flexibility is improved, and the anchor rod is not limited by geographical positions and landforms.
3) Through setting up detachable guide cylinder, can change the guide cylinder of different diameters according to stock design diameter to reach furthest and reduce stock and guide cylinder clearance, realize loading plane and stock axis purpose perpendicular as far as possible.
4) The base plate is arranged, so that the device can be in full contact with the exposed surface of the measuring part, and the stability is ensured.
5) The production quality requirements of national standards on the strict details such as the protruding height of the crescent moon-shaped of the ribbed steel bar anchor rod, the space, the included angle between the crescent moon-shaped steel bar anchor rod and the axis are met, the pull rod which is the same as the ribbed steel bar anchor rod is lengthened, the connecting piece with the crescent moon-shaped groove is used for connecting the pull rod and the anchor rod, the coincidence of the axes of the pull rod and the anchor rod can be effectively ensured, the connection reliability can be ensured, and the drawing test result is ensured to be accurate and reliable on the whole. In addition, the mode avoids secondary processing (the traditional manual wire cutting process and the welding process), and is time-saving, labor-saving and labor-saving.
Drawings
The invention will be further explained with reference to the following figures and examples:
fig. 1 is a schematic view of the present invention (a diagonal cross-sectional view of a carrier plate).
Fig. 2 is a schematic view of the adjustable support (a cross-sectional view of the bearing plate in a diagonal direction) of the present invention.
Fig. 3 is a schematic view of the middle connection member of the present invention.
In the figure: the device comprises a pull rod 1, an anchoring device 2, a hollow jack 3, a bearing plate 4, a telescopic connecting rod 5, a telescopic supporting leg 6, a guide cylinder 7, a base plate 8, an anchor rod 9, a connecting piece 10, a first threaded rod 5-1, a second threaded rod 5-2, a first threaded sleeve 5-3, a lower threaded rod 6-1, an upper threaded sleeve 6-2, a left connecting part 10-1, a right connecting part 10-2 and a bolt 10-3.
Detailed Description
As shown in fig. 1-3, the exposed short anchor rod drawing experimental device comprises an adjustable support, a drawing connecting piece 10, a pull rod 1 and an anchor rod drawing instrument (comprising an anchoring device 2 and a hollow jack 3).
Wherein the pull rod 1 is a steel bar with the same type and specification as the anchor rod 9. The anchor rod drawing instrument is an existing instrument.
The adjustable support comprises a bearing plate 4, the bearing plate 4 is of a square structure, a through hole is formed in the center of the bearing plate, a threaded pipe orifice is formed in the lower end of the through hole, and the funnel-shaped guide cylinder 7 is connected with the threaded pipe orifice in a threaded detachable mode. The funnel-shaped guide cylinder 7 is perpendicular to the bearing plate 4, and when the pull rod 1 penetrates through the funnel-shaped guide cylinder 7, the funnel-shaped guide cylinder can be perpendicular to the bearing plate 4, so that the loading plane is perpendicular to the axis of the anchor rod 9 when the adjustable support is installed. Four telescopic supporting legs 6 are hinged to the lower end of the bearing plate 4, and the four telescopic supporting legs 6 are arranged in two groups on the left and right. The middle part of each telescopic supporting leg 6 is hinged with a telescopic connecting rod 5, the other end of each telescopic connecting rod 5 is hinged with the bearing plate 4, and the bearing plates 4, the telescopic connecting rods 5 and the telescopic supporting legs 6 form a stable triangular structure, so that the stability of the support is ensured.
The telescopic connecting rod 5 is arranged on the diagonal line of the bearing plate 4 at the hinge point of the bearing plate 4, so that the opening and closing of the telescopic supporting leg 6 and the stability of later stress are ensured.
The telescopic supporting leg 6 comprises a lower threaded rod 6-1 and an upper threaded sleeve 6-2, wherein the lower threaded rod 6-1 and the upper threaded sleeve 6-2 are in threaded connection. By rotating the lower threaded rod 6-1, the lower threaded rod 6-1 extends in and out relative to the upper threaded sleeve 6-2, and the length of each telescopic supporting leg 6 is convenient to adjust.
The telescopic connecting rod 5 comprises a first threaded rod 5-1 and a second threaded rod 5-2, and the first threaded rod 5-1 and the second threaded rod 5-2 are opposite in rotation direction and are in threaded connection with the first threaded sleeve 5-3. The first and second threaded rods 5-1 and 5-2 can be relatively moved toward and away from each other by rotating the first threaded sleeve 5-3, so that the overall length of the telescopic link 5 can be adjusted.
The lower threaded rod 6-1 is hinged with a backing plate 8. The base plate 8 is used for fully contacting with the rock surface and reducing stress deformation.
The drawing connecting piece 10 comprises a left connecting part 10-1 and a right connecting part 10-2, semicircular coating parts matched with the pull rod 1 and the anchor rod 9 are arranged on the left connecting part 10-1 and the right connecting part 10-2, and the left connecting part 10-1 and the right connecting part 10-2 coat the pull rod 1 and the anchor rod 9 through the semicircular coating parts and are locked through bolts 10-3 or U-shaped clamps. The pull rod 1 and the anchor rod 9 are connected into a whole through the drawing connecting piece 10.
According to the national standard requirement of steel bar production, crescent-shaped rib protrusions with certain height, included angle and interval are required to be designed according to requirements during production of all ribbed steel bar anchor rods, an arch bridge type drawing connecting piece 10 is manufactured, and crescent-shaped grooves matched with the crescent-shaped protrusions of the ribbed steel bar anchor rods are arranged on the inner wall of the drawing connecting piece 10. Crescent grooves are arranged in the left connecting part 10-1 and the right connecting part 10-2, and when the left connecting part 10-1 and the right connecting part 10-2 coat the pull rod 1 and the anchor rod 9, the crescent grooves are embedded with crescent rib protrusions on the anchor rod 9. The purpose that pull rod 1 (extension reinforcing bar) and stock 9 are connected is realized to the cooperation that relies on crescent rib arch and crescent recess, need not can realize effective axial connection through secondary operations such as welding. In addition, the axes of the connecting rear pull rod 1 and the anchor rod 9 can be ensured to be superposed, and the precision is improved.
The working principle and the process are as follows:
1) and extending the anchor rod: preparing a section of steel bar (namely the pull rod 1) with the same type as the tested anchor rod 9 according to the required drawing length; the crescent-shaped protrusions of the pull rod 1 and the anchor rod 9 are opposite to the crescent-shaped groove on the left connecting part 10-1, and the pull rod 1 and the crescent-shaped protrusion are arranged on the same axis through the left connecting part 10-1; clamping the crescent-shaped groove on the right connecting part 10-2 on the crescent-shaped bulges of the pull rod 1 and the anchor rod 9 to fold the left connecting part 10-1 and the right connecting part 10-2, combining the two half connecting parts into a whole by using a U-shaped clamp or a bolt, and screwing a fastening bolt;
the anchor rod 9 is lengthened through the drawing connecting piece 10, and the drawable combined anchor rod is composed of the pull rod 1 and the anchor rod 9;
2) installing an adjustable support: selecting a guide cylinder 7 with matched inner diameter according to the diameter of the tested anchor rod, wherein the guide cylinder 7 is arranged on the bearing plate 4 through threads; a combined anchor rod consisting of the pull rod 1 and the anchor rod 9 penetrates through the guide cylinder 7 of the adjustable support; rotating the first thread sleeves 5-3 according to the topographic conditions of the position of the anchor rod 9 to adjust the opening and closing angles of the telescopic supporting legs 6 so as to find proper supporting points of the supporting legs; the length of 4 telescopic supporting legs 6 is adjusted, the angle of the base plate 8 is adjusted when the tail ends of the telescopic supporting legs 6 are close to the rock surface, and the base plate 8 is in full contact with the rock surface;
3) the fixed anchor rod drawing instrument: the anchor rod drawing instrument (comprising an anchoring device 2 and a hollow jack 3) is installed according to the standard requirement;
4) and loading the test according to a method specified by the specification, and taking down the jack and the support after the test is finished.
Claims (7)
1. The utility model provides an expose shorter stock and draw experimental apparatus which characterized in that: comprises an adjustable support and a drawing connecting piece (10);
the adjustable support comprises a bearing plate (4), telescopic legs (6) are hinged to the lower end of the bearing plate (4), one end of a telescopic connecting rod (5) is hinged to the telescopic legs (6), the other end of the telescopic connecting rod is hinged to the bearing plate (4), and the bearing plate (4), the telescopic connecting rod (5) and the telescopic legs (6) form a stable triangular structure;
the drawing connecting piece (10) comprises a left connecting part (10-1) and a right connecting part (10-2), and the left connecting part (10-1) and the right connecting part (10-2) coat the pull rod (1) and the anchor rod (9) and are locked through bolts (10-3) or U-shaped clamps.
2. The exposed short anchor rod drawing experimental device according to claim 1, characterized in that: the center of the bearing plate (4) is provided with a through hole, and the lower end of the bearing plate (4) is coaxially provided with the through hole and is provided with a funnel-shaped guide cylinder (7).
3. The exposed short anchor rod drawing experimental device according to claim 1, characterized in that: the telescopic supporting leg (6) comprises a lower threaded rod (6-1) and an upper threaded sleeve (6-2), and the lower threaded rod (6-1) and the upper threaded sleeve (6-2) are in threaded connection.
4. The exposed short anchor rod drawing experimental device according to claim 3, wherein: a base plate (8) is hinged to the lower threaded rod (6-1).
5. The exposed short anchor rod drawing experimental device according to claim 1, characterized in that: the telescopic connecting rod (5) comprises a first threaded rod (5-1) and a second threaded rod (5-2), and the rotating directions of the first threaded rod (5-1) and the second threaded rod (5-2) are opposite and are in threaded connection with the first threaded sleeve (5-3).
6. The exposed short anchor rod drawing experimental device according to claim 2, characterized in that: the funnel-shaped guide cylinder (7) is perpendicular to the bearing plate (4).
7. The exposed short anchor rod drawing experimental device according to claim 1, characterized in that: the inner walls of the left connecting part (10-1) and the right connecting part (10-2) are provided with a plurality of crescent grooves along the length direction, and the crescent grooves are matched with the crescent protrusions on the anchor rod (9) and the pull rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020968774.4U CN212459180U (en) | 2020-06-01 | 2020-06-01 | Exposed short anchor rod drawing experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020968774.4U CN212459180U (en) | 2020-06-01 | 2020-06-01 | Exposed short anchor rod drawing experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212459180U true CN212459180U (en) | 2021-02-02 |
Family
ID=74477532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020968774.4U Withdrawn - After Issue CN212459180U (en) | 2020-06-01 | 2020-06-01 | Exposed short anchor rod drawing experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212459180U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686669A (en) * | 2021-08-16 | 2021-11-23 | 北京思建新创工程质量检测有限公司 | Drawing detector for anchoring performance of embedded connecting piece and construction method thereof |
-
2020
- 2020-06-01 CN CN202020968774.4U patent/CN212459180U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686669A (en) * | 2021-08-16 | 2021-11-23 | 北京思建新创工程质量检测有限公司 | Drawing detector for anchoring performance of embedded connecting piece and construction method thereof |
| CN113686669B (en) * | 2021-08-16 | 2024-01-26 | 北京思建新创工程质量检测有限公司 | Draw detector for anchoring performance of embedded connecting piece and construction method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20210202 Effective date of abandoning: 20220505 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20210202 Effective date of abandoning: 20220505 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |