CN207096003U - A kind of mechanical cross plate shearing instrument - Google Patents
A kind of mechanical cross plate shearing instrument Download PDFInfo
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- CN207096003U CN207096003U CN201720895486.9U CN201720895486U CN207096003U CN 207096003 U CN207096003 U CN 207096003U CN 201720895486 U CN201720895486 U CN 201720895486U CN 207096003 U CN207096003 U CN 207096003U
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- rotating shaft
- central rotating
- linking arm
- outer tube
- shoe
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model discloses a kind of mechanical cross plate shearing instrument, including central rotating shaft, cross wrench, outer tube, shoe and torque-measuring apparatus, central rotating shaft is placed in inside outer tube, and outer tube bottom is fixedly connected with shoe, central rotating shaft bottom connection cross wrench；The cross plate shearing instrument is when carrying out live vane shear test, frictional force and mechanical resistance moment of torsion of the soil body to axostylus axostyle are eliminated by increasing pillar and shoe, actual soil body undrained shear strength can directly be measured when determining soil body undrained shear strength, the index being calculated is closer to actual value.
Description
Technical field
The utility model belongs to the device of rock-soil engineering in-situ test, relates particularly to a kind of mechanical vane-shear
Instrument.
Background technology
In geotechnical engineering investigation field, in order to determine the not draining of the undrained shear strength, manipulated soil of saturation soft clay
The sensitivity of shearing strength and the soil body, the vane shear test of generally use original position.Cross plate shearing instrument in situ, which is divided into, machinery
Formula and electric measuring type, and mechanical four-bladed vane instrument primary structure is device for measuring force, outer tube, inner cross board shaft bar, cross wrench；Electricity
It is data collecting system, injection power apparatus, axostylus axostyle, wire, band torsion torque sensor cross wrench to survey four-bladed vane primary structure.
For mechanical four-bladed vane when measuring soil body undrained shear strength, torsional moment is the soil body to cross wrench and axostylus axostyle
Torsional moment sum.During test, because the soil body measures draining shearing resistance to the frictional force and mechanical resistance of axostylus axostyle
Intensity is bigger than the soil body undrained shear strength of reality, influences the accuracy of test parameters.
Utility model content
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of mechanical cross plate shearing instrument, this ten
Letter stencil boxshear apparatus eliminates frictional force of the soil body to axostylus axostyle when carrying out live vane shear test, by increasing pillar and shoe
With mechanical resistance moment of torsion, actual soil body undrained shear strength can be directly measured when determining soil body undrained shear strength,
The index being calculated is closer to actual value.
The utility model is achieved through the following technical solutions：
The technical solution of the utility model is further illustrated with reference to specific embodiment.
A kind of mechanical cross plate shearing instrument, including central rotating shaft, cross wrench, outer tube, shoe and torque-measuring apparatus,
Central rotating shaft is placed in inside outer tube, and outer tube bottom is fixedly connected with shoe, central rotating shaft bottom connection cross
Wrench；
Torque-measuring apparatus includes mounting bracket, wind, the first spur gear, the second spur gear, worm screw, worm gear, c-opening
Steel loop, linking arm, wind are arranged on mounting bracket by bearing spider, and wind connects the first spur gear, the first spur gear
Engaged with the second spur gear, the second spur gear is coaxially fixed on worm screw, and the both ends of worm screw are rotatably installed in by bearing spider
On mounting bracket, worm and wheel engagement, worm gear wheel is arranged on mounting bracket, and wind passes through the first spur gear and the second straight-tooth
Wheel drive worm screw rotates, worm drive worm gear wheel；One end of c-opening steel loop is fixed on worm gear, c-opening steel loop it is another
One end is connected with linking arm, the axis hole being provided centrally with for penetrating central rotating shaft of mounting bracket, and central rotating shaft top passes through peace
The axis hole shelved simultaneously passes through key connection with the inner of linking arm；The peace for dial gauge to be fixedly mounted is further fixedly arranged on worm gear
Fill support；Mounting bracket bottom is provided with for the tight mechanism of fastening outer sleeve control, so that outer tube top is fixed with mounting bracket.
In the above-mentioned technical solutions, the installation being provided with central rotating shaft connection end for installation center rotating shaft of linking arm
Hole, the inner wall of the hole installing are provided with keyway, are also equipped with keyway on central rotating shaft, and during installation, central rotating shaft loads linking arm
Mounting hole in, by the keyway of the keyway of central rotating shaft and linking arm mounting hole align, be then placed in key, make linking arm and center
Rotating shaft is fixed.
In the above-mentioned technical solutions, guide wheel is provided between central rotating shaft and outer tube.
In the above-mentioned technical solutions, shoe is cross that cross wrench can be accommodated in shoe.
The application method of mechanical cross plate shearing instrument is as follows：
Step 1：In testing site position by MTD requirement prebored hole, then by outside with outer tube and shoe
Central rotating shaft and cross wrench transfer to bottom hole, and cross wrench is accommodated in shoe in decentralization process, so as to prevent cross wrench
Caused central rotating shaft that bending deformation occurs with cross wrench junction by the soil body resistance during decentralization；After transferring to designated depth,
Under push away central rotating shaft, cross wrench protruded tube boots is inserted the soil body to be tested；
Step 2：Torque-measuring apparatus is installed, the axis hole by central rotating shaft through the mounting bracket of installation torque-measuring apparatus,
And central rotating shaft is fitted into the mounting hole of linking arm, the keyway of the keyway of central rotating shaft and linking arm mounting hole is alignd, so
After be put into key, linking arm is fixed with central rotating shaft；And tighten overcoat control and press closer bar, overcoat control is pressed closer into bar and mounting bracket
It is fixed；Finally, dial gauge is arranged in the mounting bracket on worm gear, makes the gauge head end of dial gauge and the outer termination of linking arm
Touch, and dial gauge is adjusted to zero-bit；
Step 3：On-test, wind is shaken, while start stopwatch, every turn of worm gear 10Survey note percentage meter reading 1 time,
After there is peak value in reading, full-scale reading R when its peakreading is undisturbed soil failure by sheary；
Step 4：Key is extracted, linking arm is lost with central rotating shaft and connects, rotary handle, up time are loaded onto in central rotating shaft upper end
Pin direction rotates multi-turn, four-bladed vane surrounding soil is fully disturbed, then removes rotary handle, plug key again, make linking arm
It is connected with central rotating shaft, according to step 3, the full-scale reading R' of dial gauge when surveying note manipulated soil failure by sheary。
The advantages of the utility model and have the beneficial effect that：
The utility model is simple to operate, easy to loading and unloading, and operating efficiency is greatly improved.Cross wrench outside central rotating shaft with increasing
Shoe and pillar, during vane shear test is tested, eliminate axostylus axostyle (i.e. central rotating shaft) and produced with soil body rubbing action
Moment of friction and mechanical resistance square, when calculating soil body undrained shear strength index, it is not necessary to consider further that and the soil body friction make
With caused torque and mechanical resistance square, soil body undrained shear strength is close to actual value.
The utility model device is by Co., Ltd of Zhong Jiao bay works research institute in Tianjin port region, PORT OF HUANGHUA area
Widely applied in multiple reinforcing soft foundations, prospecting project, the vane strength value drawn is more true and reliable.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Schematic diagram when Fig. 2 is cross wrench income shoe.
Schematic diagram when Fig. 3 is cross wrench protruded tube boots.
Fig. 4 is Fig. 1 top view.
Fig. 5 is Fig. 4 partial enlarged view.
Structural representation after dial gauge is installed when Fig. 6 is use of the present utility model.
The structural representation of step 4 when Fig. 7 is use of the present utility model.
Embodiment
The technical solution of the utility model is further illustrated with reference to specific embodiment.
A kind of mechanical cross plate shearing instrument, referring to accompanying drawing, including central rotating shaft 1, cross wrench 2, outer tube 3, shoe 4
With for driving central rotating shaft and realizing the torque-measuring apparatus of torque measurement,
Central rotating shaft 1 is coaxially placed in inside outer tube 3, and the bottom of outer tube 3 is fixedly connected with shoe 4, the bottom of central rotating shaft 1
End connection cross wrench 2, referring to accompanying drawing 2 and 3, shoe is cross, and cross wrench 2 can be accommodated in shoe 4；
Torque-measuring apparatus includes mounting bracket 5.1, wind 5.2, the first spur gear 5.3, the second spur gear 5.4, worm screw
5.5th, worm gear 5.6, c-opening steel loop 5.7, linking arm 5.8, wind 5.2 are arranged on mounting bracket 5.1 by bearing spider a
On, wind 5.2 connects the first spur gear 5.3, and the first spur gear and the second spur gear 5.4 engage, and the second spur gear is coaxially solid
It is scheduled on worm screw 5.5, the both ends of worm screw are rotatably installed on mounting bracket 5.1 by bearing spider b, worm screw 5.5 and worm gear 5.6
Engagement, worm gear 5.6 are rotatably installed on mounting bracket 5.1, and wind is revolved by the first spur gear and the second straight-tooth wheel drive worm screw
Turn, worm drive worm gear wheel；One end of c-opening steel loop 5.7 is bolted on worm gear 5.6, c-opening steel loop
The other end be connected with linking arm 5.8, the axis hole being provided centrally with for penetrating central rotating shaft of mounting bracket, central rotating shaft top
Through the axis hole of mounting bracket, the inner and the central rotating shaft top of linking arm pass through key connection；It is further fixedly arranged on and is used on worm gear
The mounting bracket 5.9 of dial gauge is fixedly mounted；Mounting bracket bottom is provided with presses closer bar for the overcoat control of fastening outer sleeve pipe
5.10, outer tube top presses closer bar by overcoat control and fixed with mounting bracket.
Further, linking arm the inner fixed with central rotating shaft top by key, i.e., linking arm with central rotating shaft company
The mounting hole held and be provided with for installation center rotating shaft is connect, the inner wall of the hole installing is provided with keyway, is also equipped with central rotating shaft
Keyway, during installation, central rotating shaft is fitted into the mounting hole of linking arm, by the keyway of central rotating shaft and the keyway of linking arm mounting hole
Alignment, is then placed in key 5.11, linking arm is fixed with central rotating shaft；
Further, guide wheel 6 is provided between central rotating shaft 1 and outer tube 3, because guide wheel is remote to the resistance of central rotating shaft
Resistance much smaller than the soil body to central rotating shaft, so resistance of the guide wheel to central rotating shaft can be ignored during test；
Application method is as follows：
Step 1：In testing site position by MTD requirement prebored hole, then by outside with outer tube and shoe
Central rotating shaft and cross wrench transfer to bottom hole, and cross wrench is accommodated in shoe in decentralization process, so as to prevent cross wrench
Caused central rotating shaft that bending deformation occurs with cross wrench junction by the soil body resistance during decentralization；After transferring to designated depth,
Under push away central rotating shaft, cross wrench protruded tube boots is inserted the soil body to be tested；
Step 2：Torque-measuring apparatus is installed, the axis hole by central rotating shaft through the mounting bracket of installation torque-measuring apparatus,
And central rotating shaft is fitted into the mounting hole of linking arm, the keyway of the keyway of central rotating shaft and linking arm mounting hole is alignd, so
After be put into key, linking arm is fixed with central rotating shaft；And tighten overcoat control and press closer bar, overcoat control is pressed closer into bar and mounting bracket
It is fixed；Finally, dial gauge 7 is arranged in the mounting bracket on worm gear, referring to accompanying drawing 6, makes the gauge head end of dial gauge with being connected
The outer end in contact of arm, and dial gauge is adjusted to zero-bit；
Step 3：On-test, wind is shaken, while start stopwatch, every turn of worm gear 10It is (counterclockwise) to survey note dial gauge
Reading 1 time, after there is peak value in reading, full-scale reading R when its peakreading is undisturbed soil failure by sheary(RyFor calculating
Original state soil body undrained shear strength index Cu=1000KCRy)；
Step 4：Key is extracted, linking arm is lost even (i.e. central rotating shaft loses with torque-measuring apparatus and connected) with central rotating shaft,
Rotary handle 8 is loaded onto in central rotating shaft upper end, and 6 circle, makes four-bladed vane surrounding soil fully disturb, then remove rotationally clockwise
Rotary handle, key is plugged again, linking arm is connected with central rotating shaft, according to step 3, survey hundred when remembering manipulated soil failure by shear
Divide the full-scale reading R' of tabley(R'yFor calculating remodeling soil body undrained shear strength index C'u=1000KCR'y)。
Exemplary description is done to the utility model above, it should explanation, do not departing from core of the present utility model
In the case of the heart, any simple deformation, modification or other skilled in the art can not spend creative work etc.
The scope of protection of the utility model is each fallen within replacing.
Claims (4)
- A kind of 1. mechanical cross plate shearing instrument, it is characterised in that：Including central rotating shaft, cross wrench, outer tube, shoe and moment of torsion Measurement apparatus,Central rotating shaft is placed in inside outer tube, and outer tube bottom is fixedly connected with shoe, central rotating shaft bottom connection cross wrench；Torque-measuring apparatus includes mounting bracket, wind, the first spur gear, the second spur gear, worm screw, worm gear, c-opening steel Ring, linking arm, wind connect the first spur gear, and the first spur gear and the engagement of the second spur gear, the second spur gear are coaxially fixed On worm screw, worm and wheel engagement, worm gear wheel is arranged on mounting bracket, and wind passes through the first spur gear and the second straight-tooth Wheel drive worm screw rotates, worm drive worm gear wheel；One end of c-opening steel loop is fixed on worm gear, c-opening steel loop it is another One end is connected with linking arm, the axis hole being provided centrally with for penetrating central rotating shaft of mounting bracket, and central rotating shaft top passes through peace The axis hole shelved simultaneously passes through key connection with the inner of linking arm；The peace for dial gauge to be fixedly mounted is further fixedly arranged on worm gear Fill support；Mounting bracket bottom is provided with for the tight mechanism of fastening outer sleeve control, so that outer tube top is fixed with mounting bracket.
- A kind of 2. mechanical cross plate shearing instrument according to claim 1, it is characterised in that：Linking arm connects with central rotating shaft The mounting hole held and be provided with for installation center rotating shaft is connect, the inner wall of the hole installing is provided with keyway, is also equipped with central rotating shaft Keyway, during installation, central rotating shaft is fitted into the mounting hole of linking arm, by the keyway of central rotating shaft and the keyway of linking arm mounting hole Alignment, is then placed in key, linking arm is fixed with central rotating shaft.
- A kind of 3. mechanical cross plate shearing instrument according to claim 1, it is characterised in that：Between central rotating shaft and outer tube It is provided with guide wheel.
- A kind of 4. mechanical cross plate shearing instrument according to claim 1, it is characterised in that：Shoe is cross, four-bladed vane Head can be accommodated in shoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720895486.9U CN207096003U (en) | 2017-07-21 | 2017-07-21 | A kind of mechanical cross plate shearing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720895486.9U CN207096003U (en) | 2017-07-21 | 2017-07-21 | A kind of mechanical cross plate shearing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207096003U true CN207096003U (en) | 2018-03-13 |
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ID=61545885
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720895486.9U Active CN207096003U (en) | 2017-07-21 | 2017-07-21 | A kind of mechanical cross plate shearing instrument |
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| CN (1) | CN207096003U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389472A (en) * | 2017-07-21 | 2017-11-24 | 中交天津港湾工程研究院有限公司 | A kind of mechanical cross plate shearing instrument and its application method |
-
2017
- 2017-07-21 CN CN201720895486.9U patent/CN207096003U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107389472A (en) * | 2017-07-21 | 2017-11-24 | 中交天津港湾工程研究院有限公司 | A kind of mechanical cross plate shearing instrument and its application method |
| CN107389472B (en) * | 2017-07-21 | 2023-07-14 | 中交天津港湾工程研究院有限公司 | Mechanical cross plate shearing instrument and use method thereof |
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