CN209784066U - Soil nail drawing test box and soil nail drawing test device - Google Patents
Soil nail drawing test box and soil nail drawing test device Download PDFInfo
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- CN209784066U CN209784066U CN201920539851.1U CN201920539851U CN209784066U CN 209784066 U CN209784066 U CN 209784066U CN 201920539851 U CN201920539851 U CN 201920539851U CN 209784066 U CN209784066 U CN 209784066U
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Abstract
The utility model relates to a soil nail draws test box and soil nail and draws test device, draw the test box including device frame and soil nail, the soil nail draws the test box including the box that is used for filling experimental soil layer, the soil nail draws the test device including the vertical biasing mechanism that is used for applying vertical power to experimental soil layer and be used for applying horizontal effort to corresponding soil nail and executing the mechanism that draws, be provided with left side support and right side support along upper and lower direction guide movement respectively on the relative box wall about the box, the left side support has the left side support hole that supplies corresponding soil nail left end to wear to adorn, the right side support has the confession the soil nail runs through the right side support hole of installation along left and right directions, transversely execute and draw the mechanism and have and be used for being connected with the soil nail that the soil nail right-hand member transmission links. The utility model provides an among the prior art by experimental vertical soil layer pressure, the soil nail easily takes place the flexography and leads to the inaccurate problem of dynamometry.
Description
Technical Field
The utility model relates to a soil nail among the soil nail supporting test field draws proof box and soil nail and draws test device.
Background
The soil nails are widely used in foundation pit support with the advantages of economy, construction convenience and the like. In the soil nail support, the stress performance of the soil nails is a key point for the safety and stability of the foundation pit side slope, and if the stress of the soil nails is too large, the soil nails are stressed by tension or slip between the soil nails and the surrounding soil body is generated, so that the foundation pit side slope is collapsed and damaged. The damage of the soil nail body can be determined by the yield strength of the material, the acting force between the soil nail and the soil body relates to the problem of contact shearing action of the two materials, and the soil nail body has more influencing factors and is difficult to determine. Therefore, reasonable values of the nailing and shearing friction acting force are often control indexes of engineering practice.
The soil shearing friction acting force of the soil nail can be well tested through a soil nail drawing test, the device for the soil nail drawing test at present mainly comprises a box body used for filling a rock soil sample, namely a test soil body, during the test, the soil nail to be tested is arranged in the box body, two ends of the soil nail are supported on the box body walls of two opposite sides of the box body, a rubber water bag is usually adopted above the soil body to form a vertical pressing device, vertical load is applied to the test soil layer to simulate real stratum pressure, a hydraulic jack at one end of the soil nail applies pulling force to the soil nail, a dynamometer is arranged between the hydraulic jack and the soil nail, and the shearing friction acting force of the soil nail and the soil body is measured.
The existing soil nail pulling resistance test box has the problems that: the both ends of soil nail directly support on the box wall of box, after vertical biasing means applyed pressure to the experimental soil body of soil nail upside, the decurrent effort of direction is applyed to soil nail to experimental soil body, because the both ends of soil nail are supported the restraint by the box wall, the flexural deformation of middle part downwarping appears easily in the soil nail, this has not only changed nail soil interface contact state, it is inhomogeneous to make soil nail and soil body contact stress, lead to shearing frictional force test distortion, also make the frictional force increase of soil nail and box wall, the jamming can appear even, further influence the accuracy of experimental feasibility of execution and test result.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a soil nail drawing test box, which solves the problem that the soil nail is easy to be bent and deformed under the pressure of a tested vertical soil layer in the prior art; an object of the utility model is to provide an use this soil nail to draw test device is drawn to soil nail of proof box still.
For solving the technical problem, the utility model discloses well soil nail draws test device's technical scheme as follows:
The utility model provides a soil nail draws test device, draw the proof box including device frame and soil nail, soil nail draws the proof box including the box that is used for filling the experimental soil body, soil nail draws the test device including the vertical mechanism of exerting pressure that is used for exerting vertical power to the experimental soil body and is used for exerting horizontal effort to corresponding soil nail and transversely exerts and draw the mechanism, it is provided with left side support and right side support to follow upper and lower direction guide movement respectively on the relative box wall about the box, left side support has the left side support hole that supplies corresponding soil nail left end to wear to adorn, right side support has the confession soil nail runs through the right side support hole of installation along left and right directions, transversely exert and draw the mechanism and have the soil nail link that is used for linking to each other with soil nail right.
the transverse pulling mechanism is assembled on the device frame in a guiding and moving way along the up-down direction.
The device frame comprises a base, stand columns arranged on the left side and the right side of the base and a cross beam arranged at the top end of the stand columns, a transverse drawing mechanism is arranged on the stand columns on the right side, and a vertical pressing mechanism is arranged on the cross beam.
The vertical pressing mechanism comprises vertical loading cylinders which are arranged at left and right intervals, the lower end of each vertical loading cylinder is provided with a loading ball groove, the soil nail drawing test device further comprises a loading cover plate used for transferring force between the vertical pressing mechanism and a test soil body, and a force transferring ball head matched with the corresponding loading ball groove for transferring force is arranged at the upper end of the loading cover plate.
The right side slot hole that length extended along the upper and lower direction was provided with on the right side box body wall of box, and the right side is supported to have and is kept off along with the right side that right side box body wall is to pasting connection or is connected through seal ring, wears to be equipped with in the right side slot hole and keeps off the bolt that links to each other along with the right side.
The right side waist type hole that arranges along upper and lower direction still is seted up on the right side box wall of box, and the right side is supported still includes to keep off along the fixed plate on right side through the fix with screw, and the right side keeps off to be equipped with between edge and the fixed plate to be used for with soil nail seal fit's right side rubber pad, the right-hand member salient of fixed plate in right side box wall, the fixed plate wear to locate with in the right side waist type hole, the right side keeps off along the left side that is located right side box wall.
The utility model discloses well soil nail draws technical scheme of proof box does:
The utility model provides a soil nail drawing test box, is including the box that is used for filling the experimental soil body, and relative box wall about the box is gone up respectively along upper and lower direction removal and is provided with left side support and right side support, and the left side support has the left side support hole that supplies corresponding soil nail left end to wear to adorn, and the right side support has the confession the soil nail runs through the right side support hole of installation along left and right directions.
The right side slot hole that length extended along the upper and lower direction was provided with on the right side box body wall of box, and the right side is supported to have and is kept off along with the right side that right side box body wall is to pasting connection or is connected through seal ring, wears to be equipped with in the right side slot hole and keeps off the bolt that links to each other along with the right side.
The right side waist type hole that arranges along upper and lower direction still is seted up on the right side box wall of box, and the right side is supported still includes to keep off along the fixed plate on right side through the fix with screw, and the right side keeps off to be equipped with between edge and the fixed plate to be used for with soil nail seal fit's right side rubber pad, the right-hand member salient of fixed plate in right side box wall, the fixed plate wear to locate with in the right side waist type hole, the right side keeps off along the left side that is located right side box wall.
The utility model has the advantages that: during the use, wear the dress after passing by the right side support hole in the left side support hole of left side support with the left end of waiting experimental soil nail, then draw the experimental soil layer of packing into in the experimental case to the soil nail, because left side support, right side support and box body wall are for the direction removal cooperation relation along the upper and lower direction, consequently at the in-process of filling out, can support earlier the left side, the right side is supported and is adjusted higher position, make left side support, the bottom of right side support does not contact with the box body wall, after filling out soil, left side support, right side support directly supports on the experimental soil layer of downside. When drawing the experiment, vertical mechanism of exerting pressure exerts pressure to the experimental soil layer of soil nail upside, the experimental soil layer of soil nail upside exerts pressure to the soil nail, because the left side at soil nail both ends supports, the right side supports and is supported on experimental soil layer, consequently, after the soil nail receives upper portion pressure, soil nail and left side support, the right side supports can holistic downward translation and exert pressure to the soil layer of exerting pressure of downside, the whole downward translation of soil nail can not produce middle part warp deformation down as prior art is the same, consequently, do not have too many soil nails, annex frictional force outside the experimental soil layer produces, can improve measurement accuracy, in addition the soil nail is to the experimental soil layer extrusion back in downside area, also can form frictional force between experimental soil layer of downside area and the soil nail downside surface, be close true soil nail atress state more like this.
Drawings
FIG. 1 is a diagram illustrating an exemplary embodiment of a soil nail pull-out test apparatus according to the present invention;
FIG. 2 is a schematic structural diagram of the soil nail drawing test box in FIG. 1;
FIG. 3 is a right side view of FIG. 2;
Fig. 4 is a schematic view of the state of fig. 3 without the right side support.
Detailed Description
The utility model discloses an embodiment of well soil nail pull-out test device is shown in FIG. 1 ~ 4, draw test box 4 including device frame and soil nail, device frame includes left and right spaced apart stand 18, be connected with base 19 between the lower extreme of two stands, be provided with crossbeam 17 between the top of two stands the soil nail pull-out test box includes the box that is used for filling the experimental soil body, the box is fixed in on the base when using, the box includes bottom plate and box wall all around, soil nail pull-out test device includes the vertical application of pressure mechanism that is used for exerting vertical force to the experimental soil body and is used for exerting the horizontal mechanism that draws of horizontal effort to corresponding soil nail, horizontal mechanism that draws is horizontal loading cylinder 14 in this embodiment, the stand right side on right side is provided with vertical guide rail 15 that the direction extends along the upper and lower direction, horizontal loading cylinder 14 direction is moved and is assembled on vertical guide rail 15 in the direction, the high position of horizontal loading cylinder can be adjusted like this, after horizontal loading cylinder high position adjustment, realize the fixing of horizontal loading cylinder 14 relative device frame through the bolt, be provided with the soil nail that is used for being connected with the soil nail of soil nail right-hand drive connection of soil nail, the right-hand member, the transmission of the horizontal loading cylinder, the transmission of the vertical loading cylinder, it includes that the vertical loading cylinder is connected to be provided with the vertical loading cylinder, the vertical loading cylinder is provided with the vertical loading cylinder, the vertical loading cylinder is connected with the vertical loading cylinder, the vertical loading cover plate that the vertical.
in the embodiment, the right support is composed of a right baffle edge 23 and a fixed plate 22 which are arranged left and right and are fixed together, a right rubber pad 40 used for being in sealing fit with the soil nail is arranged between the right baffle edge and the fixed plate, a fit clearance of 0.1 ~ 0.3.3 mm probably exists between the soil nail and the fixed plate, if too much soil enters between the soil nail and the fixed plate, clamping stagnation during drawing of the soil nail can be caused, measurement of tensile resistance of the soil nail is influenced, the right rubber pad is protruded from the right baffle edge and the fixed plate, so that the right rubber pad can be in sealing fit with the soil nail, a part of soil particles possibly clamped between the right baffle edge and the soil nail in the drawing process of the soil nail can be pushed, the right side can allow soil particles clamped between the soil nail and the right baffle plate to completely come out, the phenomenon that after the soil nail is drawn, a lot of the soil particles possibly clamped between the right baffle edge and the soil nail and the fixed plate can not be clamped between the left baffle edge and the fixed plate, the left baffle edge of the fixed plate, the waist particles 20 and the fixed plate 22 are arranged in the box, the waist holes 20, the waist holes are arranged along the left side of the fixed plate, the waist holes, the waist particles are arranged on the waist holes, the waist.
The utility model is used as follows, the soil nail 1 to be tested is arranged in the sleeve of the left support and the right support in a penetrating way, the bolt 21 is loosened, the height positions of the left support 5 and the right support 2 are adjusted upwards, the bottom of the sleeve part of the left support and the right support is ensured not to be contacted with the lower side hole wall of the waist-shaped hole, in particular, the bottom of the fixing plate 22 is not contacted with the lower side hole wall of the right waist-shaped hole, the bottom of the left fixing plate is not contacted with the lower side hole wall of the left waist-shaped hole, then the bolt 21 is locked, the soil nail test box is filled with the test soil 6, the test soil 6 is distributed at the upper side and the lower side of the soil nail, after the test soil layer is filled, the loading cover plate is arranged at the uppermost side of the test soil layer, the bolt 21 is loosened, at the moment, the soil nail 1 is supported by the test soil layer at the lower side, the pressure transmission on experimental soil layer gives the soil nail, the soil nail is exerted pressure to its experimental soil layer of downside, soil nail 1 and the left side at both ends support 5, the right side supports 2 downward translations and extrudees the experimental soil layer of downside, the soil nail can not take place the deflection deformation, because the height of vertical connecting pin axle, therefore during the downward translation of soil nail, can not produce vertical load to horizontal loading jar, because support set link plate size is greater than waist type hole on the box lateral wall, consequently, the soil nail, the left side supports, when the downward translation of right side support, also can not have soil and ooze from waist type hole position. The horizontal loading cylinder is used for drawing the soil nail, the dynamometer records the drawing force, the test soil body which generates friction force on the soil nail is arranged around the soil nail, no friction force is generated between the soil nail and the side wall of the box body, the test soil body is closer to the real stress state of the soil nail, and when the soil nail generates horizontal displacement, the reading of the dynamometer is the maximum drawing resistance of the soil nail. In other embodiments of the present invention: the right blocking edge and the fixed plate can also be integrally arranged; the right slot hole and the bolt can be omitted, the soil nail can be positioned at a higher position by means of other tools when soil is filled, for example, the soil nail is lifted by an adhesive tape or a rope, and the soil nail is loosened after soil filling is finished.
An example of the soil nail drawing test chamber is shown in FIG. 1 ~ 4. the concrete structure of the soil nail drawing test chamber is the same as that of the soil nail drawing test chambers described in the above-mentioned examples of the soil nail drawing test apparatus, and the details thereof will not be described.
Claims (8)
1. The utility model provides a soil nail draws test device, draws the proof box including device frame and soil nail, and the soil nail draws the proof box including the box that is used for filling the experimental soil body, and soil nail draws the test device and draws the mechanism including the vertical mechanism of exerting pressure that is used for exerting vertical power to experimental soil layer and the horizontal mechanism of exerting pressure that is used for exerting horizontal effort to corresponding soil nail, its characterized in that: the left side support and the right side support are arranged on the left side and the right side of the box body relative to the wall of the box body in a guiding and moving mode along the up-down direction respectively, the left side support is provided with a left side support inner hole for penetrating the left end of a corresponding soil nail, the right side support is provided with a right side support inner hole for penetrating the soil nail in the left-right direction, and the transverse pulling mechanism is provided with a soil nail connecting end for being connected with the soil nail right end in a transmission mode.
2. The soil nail drawing test device according to claim 1, wherein: the device frame comprises a base, stand columns arranged on the left side and the right side of the base and a cross beam arranged at the top end of the stand columns, a transverse drawing mechanism is arranged on the stand columns on the right side, and a vertical pressing mechanism is arranged on the cross beam.
3. The soil nail drawing test device according to claim 2, wherein: the vertical pressing mechanism comprises vertical loading cylinders which are arranged at left and right intervals, the lower end of each vertical loading cylinder is provided with a loading ball groove, the soil nail drawing test device further comprises a loading cover plate used for transferring force between the vertical pressing mechanism and a test soil layer, and a force transferring ball head matched with the corresponding loading ball groove for transferring force is arranged at the upper end of the loading cover plate.
4. The soil nail drawing test device according to any one of claims 1 ~ 3, wherein the right box wall of the box body is provided with a right slot with a length extending along the up-down direction, the right support is provided with a right blocking edge attached to the right box wall or connected through a sealing gasket, and a bolt connected with the right blocking edge penetrates through the right slot.
5. The soil nail drawing test device according to claim 4, wherein: the right side waist type hole that arranges along upper and lower direction still is seted up on the right side box wall of box, and the right side is supported still includes to keep off along the fixed plate on right side through the fix with screw, and the right side keeps off to be equipped with between edge and the fixed plate to be used for with soil nail seal fit's right side rubber pad, the right-hand member salient of fixed plate in right side box wall, the fixed plate wear to locate with in the right side waist type hole, the right side keeps off along the left side that is located right side box wall.
6. the utility model provides a soil nail draws proof box, includes the box that is used for filling test soil layer, its characterized in that: the left side support and the right side support are arranged on the left side and the right side of the box body relative to the wall of the box body in a guiding and moving mode along the up-down direction respectively, the left side support is provided with a left side support inner hole for penetrating the left end of the corresponding soil nail, and the right side support is provided with a right side support inner hole for penetrating the soil nail in the left-right direction.
7. The soil nail drawing test box according to claim 6, wherein: the right side slot hole that length extended along the upper and lower direction was provided with on the right side box body wall of box, and the right side is supported to have and is kept off along with the right side that right side box body wall is to pasting connection or is connected through seal ring, wears to be equipped with in the right side slot hole and keeps off the bolt that links to each other along with the right side.
8. the soil nail drawing test box according to claim 7, wherein: the right side waist type hole that arranges along upper and lower direction still is seted up on the right side box wall of box, and the right side is supported still includes to keep off along the fixed plate on right side through the fix with screw, and the right side keeps off to be equipped with between edge and the fixed plate to be used for with soil nail seal fit's right side rubber pad, the right-hand member salient of fixed plate in right side box wall, the fixed plate wear to locate with in the right side waist type hole, the right side keeps off along the left side that is located right side box wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920539851.1U CN209784066U (en) | 2019-04-19 | 2019-04-19 | Soil nail drawing test box and soil nail drawing test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920539851.1U CN209784066U (en) | 2019-04-19 | 2019-04-19 | Soil nail drawing test box and soil nail drawing test device |
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| Publication Number | Publication Date |
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| CN209784066U true CN209784066U (en) | 2019-12-13 |
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| CN201920539851.1U Active CN209784066U (en) | 2019-04-19 | 2019-04-19 | Soil nail drawing test box and soil nail drawing test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044698A (en) * | 2019-04-19 | 2019-07-23 | 郑州大学 | A kind of soil nailing pull-out test case and soil nailing pull-out test device |
| CN112857782A (en) * | 2021-03-04 | 2021-05-28 | 郑州大学 | Soil nail stress simulation test device, soil nail and test method |
-
2019
- 2019-04-19 CN CN201920539851.1U patent/CN209784066U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044698A (en) * | 2019-04-19 | 2019-07-23 | 郑州大学 | A kind of soil nailing pull-out test case and soil nailing pull-out test device |
| CN112857782A (en) * | 2021-03-04 | 2021-05-28 | 郑州大学 | Soil nail stress simulation test device, soil nail and test method |
| CN112857782B (en) * | 2021-03-04 | 2022-12-13 | 郑州大学 | Soil nail stress simulation test device, soil nail and test method |
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