CN102313673A - Full-automatic, digital and large frozen soil direct shear apparatus - Google Patents
Full-automatic, digital and large frozen soil direct shear apparatus Download PDFInfo
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- CN102313673A CN102313673A CN201110221970A CN201110221970A CN102313673A CN 102313673 A CN102313673 A CN 102313673A CN 201110221970 A CN201110221970 A CN 201110221970A CN 201110221970 A CN201110221970 A CN 201110221970A CN 102313673 A CN102313673 A CN 102313673A
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Abstract
The invention which belongs to the field of civil engineering equipment relates to a full-automatic, digital and large frozen soil direct shear apparatus. The large frozen soil direct shear apparatus which comprises a shear box, a refrigeration system of an upper shear box, a refrigeration system of a lower shear box, a vertical servo loading and monitoring system, a horizontal servo loading and monitoring system, and a measurement and control system is to determine the shear strength of the freeze-thaw interface of the frozen soil or determine the shear strength of full frozen soil and full thawy soil. The size of a frozen soil sample in the embodiment of the invention is 305mm*305mm*200mm, static force and a layered compacting method are adopted to prepare remolded soil samples of different initial water contents and dry densities for shear tests; temperature control systems of the upper shear box and the lower shear box are adjusted to control the temperatures of soils in the shear boxes to guarantee the shear plane to be superposed with the freeze-thaw interface of the frozen soil sample. The direct shear apparatus of the present invention solves problems that the difficulty of testing the shear strength of the freeze-thaw interface is large, the shear tests of coarse grain soil are difficult and the like and provides reasonable design parameters for civil engineering and traffic engineering in cold or highly cold regions.
Description
Technical field
The invention belongs to the civil engineering plant field, the large-scale frozen soil direct shear apparatus of particularly a kind of full-automatic numeral.
Background technology
Qinghai-Tibet Railway passes through many Yue Ling location; Therefore the roadbed that also has location, many slopes; The stability of correct such roadbed of assessment is the prerequisite that guarantees the Qinghai-Tibet Railway safe operation, is the prerequisite that proposes reasonable correct result and the geologic parameter of evaluates calculation is provided.Investigated and analysed the natural side slope of Qinghai-Tibet unstability, the position of its unstability mainly concentrates on the freeze thawing interface.
At present, the direct shear apparatus that carries out direct shear test both at home and abroad and adopted generally all by upper and lower shear box, vertical force loading system, horizontal force loading system, measure vertically to level to gearshift and provide the device etc. of counter-force partly to form.And conventional shear box can't the account temperature factor, also can't measure the shearing strength on the interface.Simultaneously, the conventional shearing because the soil body particle size in the size restrictions requirement sample of shear box must be less than the coarse sand rank.
Therefore, need direct shear apparatus of invention, it can guarantee that shear surface and freeze thawing interface overlap, have the device of temperature control and possess requirement such as the coarse particle of test sample, are used to test shearing strength on the frozen soil freeze thawing interface.
Summary of the invention
The object of the invention is that the traditional direct shear apparatus described in the background technology can't make the freeze thawing interface of soil sample and the coincidence of the shear surface between the box up and down; Can't measure particle diameter greater than the remoulded sample more than the coarse sand rank; Thereby successfully record the key issue of frozen soil soil sample shearing strength, provide a kind of full-automatic numeral large-scale frozen soil direct shear apparatus.
Full-automatic digital large-scale frozen soil direct shear apparatus mainly is made up of shear box, last shear box refrigeration system, down cut box refrigeration system, vertical servo loading and monitoring system, horizontal servo loading and monitoring system and TT&C system; It is characterized in that; Said shear box is divided into shear box 18 and down cut box 20; Down cut box 20 places through shear box cushion block 21 on the flat surface 10 of boxshear apparatus platform cabinet 9, and down cut box baffle plate 19 is positioned at down cut box 20 left vertical and is fixed on the flat surface 10, and the height of down cut box baffle plate 19 is equal to or less than the upper edge of down cut box 20; Down cut box baffle plate 19 stops down cut box 20 to be moved to the left; Last shear box 18 places on the down cut box 20, and last shear box 18 and down cut box 20 consistencies from top to bottom, frozen soil sample to be tested place in shear box 18 and the down cut box 20; The sample panel of exerting pressure covers on the frozen soil sample; Following bearing plate 17 is pressed in sample and exerts pressure on the panel, last bearing plate 15 on bearing plate 17 down, between last bearing plate 15 and the following bearing plate 17 with vertical pressure-bearing roller 16 connections;
Xsect between four inwalls of down cut box 20 is a square; Down cut box 20 is the rectangular parallelepiped box of open upper end lower end by the planar base surface sealing; Xsect between four inwalls of last shear box 18 also is a square; Last shear box 18 is top and bottom equal opening rectangular parallelepiped frames, and last shear box 18 is identical with the cross-sectional area of down cut box 20, and thrust disc 5 is fixed in the outer right wall center of shear box 18; The outer wall of last shear box 18 and down cut box 20 is coated by the last refrigeration cover and the cover that freezes down respectively; Last refrigeration cover is connected with down cut box refrigeration system with last shear box refrigeration system through refrigeration piping respectively with the cover that freezes down, in the frozen soil sample in last shear box 18 and the down cut box 20, all arranges 4 number of elements temperature display degree sensors;
Vertical servo loading comprises back up pad 11, column 7, normal thrust parts 8, back up pad 11, vertical reductor 12, vertical servomotor 13, normal thrust top 14 and pressure at right angle sensor and perpendicular displacement sensor with monitoring system; Back up pad 11 is supported on the flat surface 10 by 4 columns 7; Normal thrust parts 8 straight down frame on back up pad 11; Normal thrust parts 8 bottoms connect normal thrust top 14; Pressure at right angle sensor and perpendicular displacement sensor place in the normal thrust top 14; Normal thrust top 14 is withstood the center of bearing plate 15 and is applied pressure at right angle for the frozen soil sample, and the output shaft of vertical reductor 12 is connected with the input shaft of normal thrust parts 8 upper ends, and the axle of vertical servomotor 13 is connected with the input shaft of vertical reductor 12;
Horizontal servo loads with monitoring system and comprises that horizontal reductor 1, horizontal thrust parts 2, horizontal thrust parts holder 3, horizontal servo motor 4, horizontal thrust come directly towards 6 and horizontal pressure force sensor and horizontal displacement sensors; Horizontal thrust parts holder 3 is positioned at the right side of shear box 18 and down cut box 20 and vertically is fixed on the flat surface 10; Horizontal thrust parts 2 point to upward, and shear box 18 levels place on the fixing horizontal thrust parts holder 3; Horizontal pressure force sensor and horizontal displacement sensors place in the horizontal thrust parts 2; Horizontal thrust top 6 is fixed in the left end of horizontal thrust parts 2; The thrust disc of going up on shear box 18 right side walls 5 is aimed in horizontal thrust top 6; The thrust disc 5 that withstand on shear box 18 right side walls horizontal thrust top 6 of horizontal thrust parts 2 applies horizontal thrust for last shear box 18, and the output shaft of horizontal reductor 1 is connected with the input shaft of horizontal thrust parts 2 right-hand members, and the axle of horizontal servo motor 4 is connected with the input shaft of horizontal reductor 1;
Pressure at right angle sensor, perpendicular displacement sensor and vertical servomotor 13 in vertical servo loading and the monitoring system; Horizontal pressure force sensor, horizontal displacement sensors and horizontal servo motor 4 in horizontal servo loading and the monitoring system, digital display temperature sensor in the shear box in the frozen soil sample and last shear box refrigeration system and down cut box refrigeration system all are electrically connected with TT&C system.
The said side size range that goes up the inner square xsect of shear box 18 and down cut box 20 is 200mm～500mm, and the altitude range of shear box 18 and down cut box 20 is 60mm～150mm; The material of last shear box 18 and down cut box 20 is a corrosion resistant plate.
The said sample panel of exerting pressure is square stainless steel flat plate, and its length of side is less than the length of side 1～2mm of the square cross section between 18 4 inwalls of last shear box.
Said vertical pressure-bearing roller 16 is made up of roller 161, roller fixed mount 162, roller fixed mount buckle 163; 5～8 rollers 161 place respectively in each corresponding roller groove of roller fixed mount 162; And the rotating shaft through roller 161 and roller fixed mount 162 constitute and are rotationally connected; Four limits of roller fixed mount buckle 163 through roller fixed mount buckle 163 place the top that covers roller 161 on four limits of roller fixed mount 162 and with register pin 164 connections; When doing shear test, the roller 161 of vertical pressure-bearing roller 16 places down on the bearing plate 17, and vertical pressure-bearing roller 16 rolls with following bearing plate 17 through roller 161 and is connected; Last bearing plate 15 places on the roller fixed mount buckle 163; Acting as of vertical pressure-bearing roller 16, the pressure of sample in 8 pairs of shear boxs of transmission normal thrust parts is eliminated the influence of vertical pressurization to last shear box 18 horizontal shear displacements.
The said shear box 18 of going up leaves shear surface with the interior digital display temperature sensor of the frozen soil sample in the down cut box 20; The surface of contact that is shear box 20 and down cut box 20 is 30～50mm; And the vertical central plane symmetrical distribution of above shear box 18 and down cut box 20, the spacing of consecutive number temperature display degree sensor is 50～100mm;
The said temperature controlling range-10 that goes up shear box 18 ℃～20 ℃; The temperature controlling range of down cut box 20-10 ℃～20 ℃ goes up refrigeration cover and refrigeration cover and go up shear box refrigeration system and down cut box refrigeration system independence temperature control down by the outer wall that is coated on shear box and down cut box respectively.
Said horizontal servo loads and monitoring system loads and test parameters does, the scope of horizontal direction maximum load horizontal thrust is 50～400KN, and control loaded speed is 0.002～20mm/min automatically, and the scope of maximum shear displacement is 75mm～170mm.
Said vertical servo loading and monitoring system load and test parameters does; The scope of vertical direction maximum load pressure at right angle is 50～280KN; Automatically control loaded speed is 0.002～20mm/min, and the maximum perpendicular displacement is 300mm in the dress appearance process, and the maximum perpendicular displacement is 50mm in the process of the test.
Said TT&C system is digital control for automatically, adopts 16 channel data Acquisition Instruments that pressure, displacement, three kinds of automatic control modes of loading speed are arranged, and data output has stress-time, displacement-time and stress-displacement.
The present invention has following characteristics:
1. going up the temperature of shear box and down cut box controls separately; Through placing shear box and the inner frozen soil sample soil temperature of down cut box on the digital display temperature sensor measurement in the frozen soil sample; And the upward refrigeration of utilizing the outer wall that is coated on shear box and down cut box is respectively overlapped and following refrigeration is overlapped and go up the shear box refrigeration system and down cut box refrigeration system adjusting sample soil temperature, and the feasible shear surface of going up between shear box and the down cut box just in time is in the freeze thawing interface of frozen soil sample.
2. the material that goes up shear box and down cut box is a stainless steel, prevents corrosion under the water environment, and the down cut box is water-tight, adopts the method for static(al) and compaction in layers to prepare sample, can make the remoulded sample of different initial water contents, dry density.
3. servo loading and monitoring system vertical and horizontal direction all have digital display pressure transducer and digital display perpendicular displacement sensor, can the automatic control loaded speed of digital display.
4. TT&C system is digital control for automatically, and 16 channel data collections are pressure, displacement, three kinds of automatic control modes of loading speed, output stress-time, displacement-time and stress-displacement data.
Beneficial effect of the present invention does; That the shear surface that runs into when the invention solves shearing strength on the prior art test freeze thawing interface and freeze thawing interface can't overlap is consistent, can't prepare and carry out problem such as large scale remoulded sample shear test; Guarantee that shear surface overlaps with the freeze thawing interface; Be used to test shearing strength on the frozen soil freeze thawing interface, for cold or extremely frigid zones civil engineering and traffic engineering provide rational design parameter.
Description of drawings
The full-automatic digital large-scale frozen soil direct shear apparatus front view of Fig. 1;
The full-automatic digital large-scale frozen soil direct shear apparatus vertical view of Fig. 2;
Fig. 3 A is vertical supporting roll minor structure synoptic diagram;
Fig. 3 B is an I-I diagrammatic cross-section among Fig. 3 A.
Among the figure, the horizontal reductor of 1--, 2--horizontal thrust parts, 3--horizontal thrust parts holder, 4--horizontal servo motor, 5--thrust disc; 6--horizontal thrust top, 7--column, 8--normal thrust parts, 9--boxshear apparatus platform cabinet, 10--flat surface; The 11--back up pad, the vertical reductor of 12--, the vertical servomotor of 13--, 14--normal thrust top, the last bearing plate of 15--; The vertical pressure-bearing roller of 16--, 161--roller, 162--roller fixed mount, 163--roller fixed mount buckle, 164--register pin; Bearing plate under the 17--, the last shear box of 18--, 19--down cut box baffle plate, 20--down cut box, 21--shear box cushion block.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed explanation.
The embodiment of the large-scale frozen soil direct shear apparatus of a kind of full-automatic numeral is as depicted in figs. 1 and 2.Full-automatic digital large-scale frozen soil direct shear apparatus mainly is made up of shear box, last shear box refrigeration system, down cut box refrigeration system, vertical servo loading and monitoring system, horizontal servo loading and monitoring system and TT&C system.Shear box is divided into shear box 18 and down cut box 20; Down cut box 20 places on the flat surface 10 through shear box cushion block 21, and down cut box baffle plate 19 is positioned at down cut box 20 left vertical and is fixed on the flat surface 10, and the height of down cut box baffle plate 19 is equal to or less than the upper edge of down cut box 20; Down cut box baffle plate 19 stops down cut box 20 to be moved to the left; Last shear box 18 places on the down cut box 20, and last shear box 18 and down cut box 20 consistencies from top to bottom, frozen soil sample to be tested place in shear box 18 and the down cut box 20; The sample panel of exerting pressure covers on the frozen soil sample; Following bearing plate 17 is pressed in sample and exerts pressure on the panel, last bearing plate 15 on bearing plate 17 down, between last bearing plate 15 and the following bearing plate 17 with vertical pressure-bearing roller 16 connections.
Xsect between 20 4 inwalls of down cut box is the square of 305mm * 305mm; Down cut box 20 is the rectangular parallelepiped box of open upper end lower end by flat sealing; Highly be 100mm, the xsect between 18 4 inwalls of last shear box also is the square of 305mm * 305mm, and last shear box 18 is top and bottom equal opening rectangular parallelepiped frames; Highly be 100mm; Thrust disc 5 is fixed in the outer right wall center of shear box 18, and the outer wall of last shear box 18 and down cut box 20 is coated by the last refrigeration cover and the cover that freezes down respectively, and last refrigeration cover is connected with down cut box refrigeration system with last shear box refrigeration system through refrigeration piping respectively with the cover that freezes down; Do not draw among Fig. 1 and go up refrigeration cover and following refrigeration cover and go up shear box refrigeration system and down cut box refrigeration system; In the frozen soil sample in last shear box 18 and the down cut box 20, all arrange 4 number of elements temperature display degree sensors, the sample panel of exerting pressure covers on the frozen soil sample; The sample panel of exerting pressure is the square stainless steel flat plate of 304mm * 304mm, and the material of last shear box 18 and down cut box 20 is a corrosion resistant plate.
Vertical servo loading comprises back up pad 11, column 7, normal thrust parts 8, back up pad 11, vertical reductor 12, vertical servomotor 13, normal thrust top 14 and pressure at right angle sensor and perpendicular displacement sensor with monitoring system; Back up pad 11 is supported on the flat surface 10 by 4 columns 7; Normal thrust parts 8 straight down frame on back up pad 11; Normal thrust parts 8 bottoms connect normal thrust top 14; Pressure at right angle sensor and perpendicular displacement sensor place in the normal thrust top 14; Normal thrust top 14 is withstood the center of bearing plate 15 and is applied pressure at right angle for the frozen soil sample, and the output shaft of vertical reductor 12 is connected with the input shaft of normal thrust parts 8 upper ends, and the axle of vertical servomotor 13 is connected with the input shaft of vertical reductor 12.
Horizontal servo loads with monitoring system and comprises that horizontal reductor 1, horizontal thrust parts 2, horizontal thrust parts holder 3, horizontal servo motor 4, horizontal thrust come directly towards 6 and horizontal pressure force sensor and horizontal displacement sensors; Horizontal thrust parts holder 3 is positioned at the right side of shear box 18 and down cut box 20 and vertically is fixed on the flat surface 10; Horizontal thrust parts 2 point to upward, and shear box 18 levels place on the fixing horizontal thrust parts holder 3; Horizontal pressure force sensor and horizontal displacement sensors place in the horizontal thrust parts 2; Horizontal thrust top 6 is fixed in the left end of horizontal thrust parts 2; The thrust disc of going up on shear box 18 right side walls 5 is aimed in horizontal thrust top 6; The thrust disc 5 that withstand on shear box 18 right side walls horizontal thrust top 6 of horizontal thrust parts 2 applies horizontal thrust for last shear box 18, and the output shaft of horizontal reductor 1 is connected with the input shaft of horizontal thrust parts 2 right-hand members, and the axle of horizontal servo motor 4 is connected with the input shaft of horizontal reductor 1.
Pressure at right angle sensor, perpendicular displacement sensor and vertical servomotor 13 in vertical servo loading and the monitoring system; Horizontal pressure force sensor, horizontal displacement sensors and horizontal servo motor 4 in horizontal servo loading and the monitoring system, digital display temperature sensor in the shear box in the frozen soil sample and last shear box refrigeration system and down cut box refrigeration system all are electrically connected with TT&C system.
Shown in Fig. 3 A and Fig. 3 B; Vertical pressure-bearing roller 16 is made up of roller 161, roller fixed mount 162, roller fixed mount buckle 163; 5 rollers 161 place respectively in each corresponding roller groove of roller fixed mount 162; And the rotating shaft through roller 161 and roller fixed mount 162 constitute and be rotationally connected, and four limits of roller fixed mount buckle 163 through roller fixed mount buckle 163 place on four limits of roller fixed mount 162 and cover the top of roller 161 with register pin 164 connections, when doing shear test; The roller 161 of vertical pressure-bearing roller 16 places down bearing plate 17; Vertical pressure-bearing roller 16 rolls with following bearing plate 17 through roller 161 and is connected, and last bearing plate 15 places on the roller fixed mount buckle 163, and vertically pressure-bearing roller 16 act as; Transmit the pressure of sample in 8 pairs of shear boxs of normal thrust parts, eliminate the influence of vertical pressurization last shear box 18 horizontal shear displacements.
Directly place 2 pressure at right angle sensors and 4 perpendicular displacement sensors in the normal thrust top 14; 2 pressure at right angle sensors are respectively the digital display pressure transducer of 0～100kN and 0～50kN, and 2 pressure at right angle sensors are arranged on the diameter of normal thrust top 14; 4 perpendicular displacement sensors are respectively 2 0～25mm digital display displacement sensors (being used for shear test) and 2 0～200mm digital display displacement sensors (being used to prepare sample); 4 perpendicular displacement sensors are by in 4 1/4 circles that are separately positioned on normal thrust top 14, and same model is non-conterminous.
Directly place 2 horizontal pressure force sensors and 2 horizontal displacement sensors in the horizontal thrust top 6; 2 horizontal pressure force sensors are respectively the digital display pressure transducer of 0～150kN and 0～50kN, and 2 horizontal pressure force sensors are arranged on the diameter of horizontal thrust top 6; 2 horizontal displacement sensors are 0～25mm digital display displacement sensor, and 2 horizontal displacement sensors are by on another diameter that is separately positioned on horizontal thrust top 6.
Horizontal servo loads and monitoring system loads and test parameters does, it is 0～150KN that horizontal direction loads the horizontal thrust scope, and control loaded speed is 0.002～20mm/min automatically, and the maximum shear displacement is 100mm.Horizontal reductor 1 is-SF series reductor B52, and horizontal servo motor 4 models are that MDMA-0.75kW is the servomotor of band brake, horizontal thrust parts 2 are 15/10 thrust part.2 horizontal pressure force sensors are ZLF-E type radial sensor.
Vertical servo loading and monitoring system load and test parameters does; The pressure at right angle scope that vertical direction loads is 0～100KN; Automatically control loaded speed is 0.002～20mm/min, maximum perpendicular displacement 300mm in the dress appearance process, maximum perpendicular displacement 50mm in the process of the test.Vertically reductor 12 is-SF series reductor B52, and vertical servomotor 13 models are that MDMA-0.75kW is the servomotor of band brake, and normal thrust parts 8 are 15/10 thrust part.
TT&C system is digital control for automatically, and 16 channel data collections are pressure, displacement, three kinds of automatic control modes of loading speed, and data are output as stress-time, displacement-time and stress-displacement.
The step of using shearing strength on the large-scale frozen soil direct shear apparatus test of the above-mentioned full-automatic numeral frozen soil freeze thawing interface is:
1. utilize the frozen soil sample of sample dress original mold tool preparation 305mm * 305mm * 200mm.
With inside dimension 305mm * 305mm * 50mm; Form is that two lobes, sample dress original mold tool capable of being combined and dismounting place on the shear box of shear box 18 and down cut box 20 compositions; To calculate the soil sample of preparing by the requirement of different natural moisture contents and dry density and put into sample dress original mold tool; And place 8 number of elements temperature display degree sensors in the soil sample on request; Again soil sample is pressed into the frozen soil sample of 305mm * 305mm * 200mm, removes sample dress original mold tool, among shear box and through bearing plate, adopt static(al), compaction in layers to make the density of sample reach basic homogeneous on the frozen soil sample again.
2. start and go up shear box refrigeration system and down cut box refrigeration system; Observation places 8 number of elements temperature display degree sensors of the interior frozen soil sample of shear box up and down; Within last shear box 18 temperature controlling range-10 ℃～20 ℃ and down cut box 20 temperature controlling range-10 ℃～20 ℃; Through shear box wall refrigerating circulation system, up and down between the box temperature of shear surface be adjusted to the temperature of frozen soil freeze thawing interface.
3. shear test.
Utilize vertical servomotor 13 pressure at right angle to be put on the bearing plate 15 with vertical reductor 12; Evenly be added on the shear box through the sample panel of exerting pressure again; It is 200kN that maximum is born pressure; After being added to the required pressure at right angle of test, to open horizontal servo and load and monitoring system, the data that provide through digital display pressure transducer and digital display displacement sensor are controlled the speed of shearing force and loading.
4. TT&C system carries out the acquisition test data through 16 channel data Acquisition Instruments, and output data is stress-time, displacement-time and stress-displacement.
The collection of overall process and output are all carried out by the automatic running control software of computer.
The invention solves on the freeze thawing interface difficult problems such as the shearing strength difficulty of test is big, coarse particle soil body shear test; Be applicable to the fields such as engineering design, construction and scientific research project of industries such as cold or extremely frigid zones road, railway, worker China Democratic National Construction Association; Can be such engineering rational design parameter is provided, thereby guarantee the rationality of safety assessment.The present invention can also measure full frozen soil and melt the shearing strength of soil entirely.
Claims (9)
1. full-automatic digital large-scale frozen soil direct shear apparatus; Mainly form by shear box, last shear box refrigeration system, down cut box refrigeration system, vertical servo loading and monitoring system, horizontal servo loading and monitoring system and TT&C system; It is characterized in that said shear box is divided into shear box (18) and down cut box (20), down cut box (20) places on the flat surface (10) of boxshear apparatus platform cabinet (9) through shear box cushion block (21); Down cut box baffle plate (19) is positioned at down cut box (20) left vertical and is fixed on the flat surface (10); The height of down cut box baffle plate (19) is equal to or less than the upper edge of down cut box (20), and down cut box baffle plate (19) stops down cut box (20) to be moved to the left, and last shear box (18) places on the down cut box (20); Last shear box (18) and down cut box (20) consistency from top to bottom; Frozen soil sample to be tested places in shear box (18) and the down cut box (20), and the sample panel of exerting pressure covers on the frozen soil sample, and following bearing plate (17) is pressed in sample and exerts pressure on the panel; Last bearing plate (15) connects with vertical pressure-bearing roller (16) between last bearing plate (15) and the following bearing plate (17) on following bearing plate (17);
Xsect between four inwalls of down cut box (20) is a square; Down cut box (20) is the rectangular parallelepiped box of open upper end lower end by the planar base surface sealing; Xsect between four inwalls of last shear box (18) also is a square; Last shear box (18) is top and bottom equal opening rectangular parallelepiped frames, and last shear box (18) is identical with the cross-sectional area of down cut box (20), and thrust disc (5) is fixed in the outer right wall center of shear box (18); The outer wall of last shear box (18) and down cut box (20) is respectively by last refrigeration cover and refrigeration cover coating down; Last refrigeration cover is connected with down cut box refrigeration system with last shear box refrigeration system through refrigeration piping respectively with the cover that freezes down, in the frozen soil sample in last shear box (18) and the down cut box (20), all arranges 4 number of elements temperature display degree sensors;
Vertical servo loading comprises back up pad (11), column (7), normal thrust parts (8), back up pad (11), vertical reductor (12), vertical servomotor (13), normal thrust top (14) and pressure at right angle sensor and perpendicular displacement sensor with monitoring system; Back up pad (11) is supported on the flat surface (10) by 4 columns (7); Normal thrust parts (8) straight down frame on back up pad (11); Normal thrust parts (8) bottom connects normal thrust top (14); Pressure at right angle sensor and perpendicular displacement sensor place in the normal thrust top (14); Normal thrust top (14) is withstood the center of bearing plate (15) and is applied pressure at right angle for the frozen soil sample; The output shaft of vertical reductor (12) is connected with the input shaft of normal thrust parts (8) upper end, and the axle of vertical servomotor (13) is connected with the input shaft of vertical reductor (12);
Horizontal servo loads and monitoring system comprises horizontal reductor (1), horizontal thrust parts (2), horizontal thrust parts holder (3), horizontal servo motor (4), horizontal thrust top (6) and horizontal pressure force sensor and horizontal displacement sensors; Horizontal thrust parts holder (3) is positioned at the right side of shear box (18) and down cut box (20) and vertically is fixed on the flat surface (10); Shear box (18) level places on the fixing horizontal thrust parts holder (3) in horizontal thrust parts (2) sensing; Horizontal pressure force sensor and horizontal displacement sensors place in the horizontal thrust parts (2); Horizontal thrust top (6) is fixed in the left end of horizontal thrust parts (2); Thrust disc (5) on (6) aligning of horizontal thrust top on shear box (18) right side wall; The thrust disc (5) that withstand on shear box (18) right side wall horizontal thrust top (6) of horizontal thrust parts (2) applies horizontal thrust for last shear box (18); The output shaft of horizontal reductor (1) is connected with the input shaft of horizontal thrust parts (2) right-hand member, and the axle of horizontal servo motor (4) is connected with the input shaft of horizontal reductor (1);
Pressure at right angle sensor, perpendicular displacement sensor and vertical servomotor (13) in vertical servo loading and the monitoring system; Horizontal pressure force sensor, horizontal displacement sensors and horizontal servo motor (4) in horizontal servo loading and the monitoring system, digital display temperature sensor in the shear box in the frozen soil sample and last shear box refrigeration system and down cut box refrigeration system all are electrically connected with TT&C system.
2. the large-scale frozen soil direct shear apparatus of a kind of full-automatic numeral according to claim 1; It is characterized in that; The said side size range that goes up the inner square xsect of shear box (18) and down cut box (20) is 200mm～500mm, and the altitude range of shear box (18) and down cut box (20) is 60mm～150mm; The material of last shear box (18) and down cut box (20) is a corrosion resistant plate.
3. the large-scale frozen soil direct shear apparatus of a kind of full-automatic numeral according to claim 1 is characterized in that, the said sample panel of exerting pressure is square stainless steel flat plate, and its length of side is less than the length of side 1～2mm of the square cross section between (18) four inwalls of last shear box.
4. the large-scale frozen soil direct shear apparatus of a kind of full-automatic numeral according to claim 1; It is characterized in that; Said vertical pressure-bearing roller (16) is made up of roller (161), roller fixed mount (162), roller fixed mount buckle (163); 5～8 rollers (161) place respectively in each corresponding roller groove of roller fixed mount (162); And the rotating shaft through roller (161) and roller fixed mount (162) constitute and be rotationally connected, and four limits of roller fixed mount buckle (163) through roller fixed mount buckle (163) place on four limits of roller fixed mount (162) and cover the top of roller (161) with register pin (164) connection, when doing shear test; The roller (161) of vertical pressure-bearing roller (16) places down on the bearing plate (17); Vertical pressure-bearing roller (16) rolls with following bearing plate (17) through roller (161) and is connected, and last bearing plate (15) places on the roller fixed mount buckle (163), and vertically pressure-bearing roller (16) act as; Transmit the pressure of normal thrust parts (8), eliminate the influence of vertical pressurization last shear box (18) horizontal shear displacement to sample in the shear box.
5. the large-scale frozen soil direct shear apparatus of a kind of full-automatic numeral according to claim 1; It is characterized in that; The digital display temperature sensor is from shear surface in the said frozen soil sample of going up in shear box (18) and the down cut box (20); The surface of contact that is shear box 20 and down cut box (20) is 30～50mm, and the symmetrical distribution of the vertical central plane of above shear box (18) and down cut box (20), and the spacing of consecutive number temperature display degree sensor is 50～100mm.
6. the large-scale frozen soil direct shear apparatus of a kind of full-automatic numeral according to claim 1; It is characterized in that; The said temperature controlling range-10 that goes up shear box (18) ℃～20 ℃; The temperature controlling range-10 of down cut box (20) ℃～20 ℃ goes up refrigeration cover and refrigeration cover and go up shear box refrigeration system and down cut box refrigeration system independence temperature control down by the outer wall that is coated on shear box and down cut box respectively.
7. the large-scale frozen soil direct shear apparatus of a kind of full-automatic numeral according to claim 1; It is characterized in that; Said horizontal servo loads and monitoring system loads and test parameters does; The scope of horizontal direction maximum load horizontal thrust is 50～400KN, and control loaded speed is 0.002～20mm/min automatically, and the scope of maximum shear displacement is 75mm～170mm.
8. the large-scale frozen soil direct shear apparatus of a kind of full-automatic numeral according to claim 1; It is characterized in that; Said vertical servo loading and monitoring system load and test parameters does, the scope of vertical direction maximum load pressure at right angle is 50～280KN, and control loaded speed is 0.002～20mm/min automatically; The maximum perpendicular displacement is 300mm in the dress appearance process, and the maximum perpendicular displacement is 50mm in the process of the test.
9. the large-scale frozen soil direct shear apparatus of a kind of full-automatic numeral according to claim 1; It is characterized in that; Said TT&C system is digital control for automatically; Adopt 16 channel data Acquisition Instruments that pressure, displacement, three kinds of automatic control modes of loading speed are arranged, data output has stress-time, displacement-time and stress-displacement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110221970 CN102313673B (en) | 2011-08-04 | 2011-08-04 | Full-automatic, digital and large frozen soil direct shear apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110221970 CN102313673B (en) | 2011-08-04 | 2011-08-04 | Full-automatic, digital and large frozen soil direct shear apparatus |
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| CN102313673A true CN102313673A (en) | 2012-01-11 |
| CN102313673B CN102313673B (en) | 2012-12-26 |
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| CN 201110221970 Expired - Fee Related CN102313673B (en) | 2011-08-04 | 2011-08-04 | Full-automatic, digital and large frozen soil direct shear apparatus |
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| CN103616300A (en) * | 2013-12-03 | 2014-03-05 | 中国科学院武汉岩土力学研究所 | Device and method for testing direct shear intensity of soil containing natural gas hydrate |
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| CN104964884A (en) * | 2015-06-26 | 2015-10-07 | 中国科学院地质与地球物理研究所 | Large soil engineering direct shear strength testing device on low temperature control conditions |
| CN105751390A (en) * | 2016-03-24 | 2016-07-13 | 中国科学院武汉岩土力学研究所 | Cutting device and geomaterial direct shear apparatus |
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| CN106644780A (en) * | 2016-09-30 | 2017-05-10 | 中国矿业大学 | Frozen and thawed soil circulation shear tester |
| CN106706446A (en) * | 2016-12-20 | 2017-05-24 | 广东工业大学 | Multifunctional direct shear apparatus |
| CN106769410A (en) * | 2016-12-20 | 2017-05-31 | 盐城工学院 | A kind of frozen soil rotation shearing device |
| CN107884015A (en) * | 2017-12-13 | 2018-04-06 | 天津大学 | A kind of lateral pipeclay effect test system and method with native face apparatus for leveling |
| CN107917846A (en) * | 2017-11-01 | 2018-04-17 | 浙江大学 | Soil shear characteristic essence amount determining device and its assay method |
| CN108645718A (en) * | 2018-03-20 | 2018-10-12 | 山东科技大学 | A kind of rock multi-function scissor cuts experiment test device |
| CN108871893A (en) * | 2016-04-07 | 2018-11-23 | 三峡大学 | A kind of method that scene Soil Direct Shear test prepares the soil body with soil body preparation device |
| CN109991104A (en) * | 2019-05-06 | 2019-07-09 | 中国矿业大学(北京) | The staight scissors test device and its test method of Rock And Soil bulk material under Freezing-Melting Condition |
| CN110057688A (en) * | 2019-04-24 | 2019-07-26 | 塔里木大学 | A kind of cold area's pipeline pipeclay interface mechanical characteristic parameter experiment system |
| CN110160952A (en) * | 2019-05-22 | 2019-08-23 | 臧祥力 | Interior Friction tester |
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| CN113588447A (en) * | 2021-08-20 | 2021-11-02 | 中国科学院西北生态环境资源研究院 | Frozen soil large shear apparatus and system thereof |
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| CN102621008B (en) * | 2012-03-13 | 2014-08-20 | 中交水运规划设计院有限公司 | Fully automatic strain control type direct shear test instrument and purpose thereof |
| CN102854069A (en) * | 2012-09-24 | 2013-01-02 | 中国能源建设集团广东省电力设计研究院 | Large-scale direct shear apparatus |
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| CN103163026B (en) * | 2013-03-08 | 2014-09-24 | 长安大学 | Rock-soil pressure shear rheological testing machine and testing method |
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| CN104931360A (en) * | 2015-06-26 | 2015-09-23 | 中国科学院地质与地球物理研究所 | Equipment for testing direct shear of large-scale earthworks under dynamic load |
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| CN104931360B (en) * | 2015-06-26 | 2017-12-05 | 中国科学院地质与地球物理研究所 | Large geotechnical staight scissors test device under a kind of dynamic loading |
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| CN106644780A (en) * | 2016-09-30 | 2017-05-10 | 中国矿业大学 | Frozen and thawed soil circulation shear tester |
| CN106501097B (en) * | 2016-11-15 | 2019-01-15 | 中国地震局工程力学研究所 | A kind of shear box for freeze thawing soil layer interface direct shear test |
| CN106501097A (en) * | 2016-11-15 | 2017-03-15 | 中国地震局工程力学研究所 | A kind of shear box for freeze thawing soil layer interface direct shear test |
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| CN106769410A (en) * | 2016-12-20 | 2017-05-31 | 盐城工学院 | A kind of frozen soil rotation shearing device |
| CN106769410B (en) * | 2016-12-20 | 2023-09-19 | 盐城工学院 | Frozen soil rotary shearing device |
| CN107917846A (en) * | 2017-11-01 | 2018-04-17 | 浙江大学 | Soil shear characteristic essence amount determining device and its assay method |
| CN107884015B (en) * | 2017-12-13 | 2023-11-28 | 天津大学 | Lateral pipe soil action testing system and method with soil surface leveling device |
| CN107884015A (en) * | 2017-12-13 | 2018-04-06 | 天津大学 | A kind of lateral pipeclay effect test system and method with native face apparatus for leveling |
| CN108645718A (en) * | 2018-03-20 | 2018-10-12 | 山东科技大学 | A kind of rock multi-function scissor cuts experiment test device |
| CN110057688A (en) * | 2019-04-24 | 2019-07-26 | 塔里木大学 | A kind of cold area's pipeline pipeclay interface mechanical characteristic parameter experiment system |
| CN109991104A (en) * | 2019-05-06 | 2019-07-09 | 中国矿业大学(北京) | The staight scissors test device and its test method of Rock And Soil bulk material under Freezing-Melting Condition |
| CN110160952A (en) * | 2019-05-22 | 2019-08-23 | 臧祥力 | Interior Friction tester |
| CN112525728A (en) * | 2020-11-23 | 2021-03-19 | 西安建筑科技大学 | Large-size reinforced soil shear strength testing equipment and testing method |
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| CN112611638A (en) * | 2020-12-24 | 2021-04-06 | 石家庄铁道大学 | Frozen soil pulling and shearing integrated tester |
| CN112525723A (en) * | 2020-12-24 | 2021-03-19 | 石家庄铁道大学 | Frozen soil tensile shear tester |
| CN112525723B (en) * | 2020-12-24 | 2022-06-21 | 石家庄铁道大学 | Frozen soil tensile shear tester |
| CN113092282A (en) * | 2021-03-09 | 2021-07-09 | 东南大学 | Geotechnical testing device for low-temperature frozen soil undisturbed sample |
| CN113092282B (en) * | 2021-03-09 | 2022-03-11 | 东南大学 | Geotechnical testing device for low-temperature frozen soil undisturbed sample |
| CN113075037A (en) * | 2021-03-26 | 2021-07-06 | 武汉建工集团股份有限公司 | Intelligent road construction traffic load engineering detection test system and method |
| CN113075037B (en) * | 2021-03-26 | 2022-06-07 | 武汉建工集团股份有限公司 | Intelligent road construction traffic load engineering detection test system and method |
| CN113109178A (en) * | 2021-03-26 | 2021-07-13 | 中山大学 | Temperature control type direct shear apparatus |
| CN113109172A (en) * | 2021-03-26 | 2021-07-13 | 中山大学 | Torsional shear test device for freezing and thawing soil body |
| CN113588447A (en) * | 2021-08-20 | 2021-11-02 | 中国科学院西北生态环境资源研究院 | Frozen soil large shear apparatus and system thereof |
| CN116482309A (en) * | 2023-06-25 | 2023-07-25 | 中国科学院西北生态环境资源研究院 | Monitoring equipment for methane gas in hot-melt lake and pond in frozen soil area |
| CN116482309B (en) * | 2023-06-25 | 2023-09-08 | 中国科学院西北生态环境资源研究院 | Monitoring equipment for methane gas in hot-melt lake and pond in frozen soil area |
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