CN103674643A - Method and equipment for preparing remolded soil specimen - Google Patents
Method and equipment for preparing remolded soil specimen Download PDFInfo
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- CN103674643A CN103674643A CN201310657731.9A CN201310657731A CN103674643A CN 103674643 A CN103674643 A CN 103674643A CN 201310657731 A CN201310657731 A CN 201310657731A CN 103674643 A CN103674643 A CN 103674643A
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Abstract
The invention discloses a method and equipment for preparing a remolded soil specimen. According to the equipment and the method, a lower adjusting disc containing a reaction frame is provided with a specimen mold group, the bottom of an upper adjusting disc on the reaction frame is provided with a piston pneumatic cylinder; the reaction frame is put in a water storage barrel filled with water; the specimen mold group comprises three specimen molds, and the interfaces of the three specimen molds are respectively provided with an annular water-permeable pad; gas-removed water is introduced into a thorough inner hole of the specimen mold group for fully being blended with soil, the pressure-shaft push rod of the piston pneumatic cylinder and a pressurization cover plate are moved to the thorough inner hole of the specimen mold group by pressurization, the pressure gas drives the pressure-shaft push rod and the pressurization cover plate to pressurize the soil; and after the specimen is compacted tightly, a jack is utilized to push out the specimen, and the specimen can be utilized to perform various tests. The beneficial effects comprise that the operation is simple and convenient; the specimen has complete integrality, is uniform in compactness distribution, does not generate phenomena of layers and discontinuous interfaces; and the subsequent saturation-state finishing process is accelerated.
Description
Technical field
The present invention relates to a kind of method and apparatus, particularly a kind of method and equipment thereof of making molality soil examination body.
Background technology
When the shop experiment of operation soil, the examination body using comprises terrain sampling and molality examination body.For the molality examination body of making coherency soil, tamping in layers is the mode of often using.But for the molality examination body of coherency soil, examination body is used the mode of tamping in layers to have following shortcoming, and then affects whole homogeneity, tight ness rating and saturation degree.For example: the tight ness rating of tamping each level is wayward, form the different unit dry weight of each level, and whole unit dry weight is the mean value for each level unit weight, but not equally distributed effective unit weight; Layering easily forms smooth aspect, and interface soil particle does not take second place and tries the complete embedding of body with levels, easily causes the uncontinuity of layering position; Due to the speciality of its low-permeability, the saturated long time that must expend of examination body can complete; Degassed water also may occur in saturation history, and via examination body bottom, the interface along examination body and rubber membrane upwards flows, and makes to try the phenomenon that body inside all the time cannot be fully saturated; Because testing equipment must try the action that body is saturated, if increase, wait for the saturated time, this examination body cannot re-use between the period of saturation in other experiment works of operation.In addition, traditional coherency molality examination system is done, and uses the mode that manual zoning tamps to carry out more, must possess skilled technical side and can maintain and try weight in the standard of homogeneous, and follow-up examination body operate in saturation more needs to expend long time and can complete.
Summary of the invention
The object of the present invention is to provide a kind of method and equipment thereof of making molality soil examination body, in order to solve above-mentioned existing issue.
Technical scheme of the present invention is as follows: a kind of method of making molality soil examination body, it is characterized in that: the method comprises: a. puts into reaction frame the water butt of filled with water, and so that doing system, examination system is held in the state in water; B. the first examination mould, the second examination mould, long examination mould are locked according to order, but at the above two or must first lock the first annular permeable pad, the second annular permeable pad in both interval afterwards, then will careful the moving on on reaction frame of examination mould group; C. piston pneumatic cylinder is locked in the upper adjustment plate on reaction frame, locks rear adjustment vertical and horizontal; D. the first permeable stone is placed to the longest examination mould the 3rd endoporus bottom of below, and examination mould group is locked in the lower adjustment plate below reaction frame, after completing, whether attention examination mould group has parallel and vertical with the pressure axis push rod above piston pneumatic cylinder; E. the soil fully mixing and stirring with degassed water is inserted to the first endoporus, the second endoporus, the 3rd endoporus of the first examination mould, the second examination mould, long examination mould; F. adjusting pressure regulator valve promotion piston pneumatic cylinder pressurizes; G. try body densification complete after, use pressure regulator valve that the pressure in piston pneumatic cylinder is all released, the rise that now pressure axis push rod can be slowly, then just can shift out reaction frame and then will try under mould assembling and dismantling; H. after pulling down, the second examination mould, the length examination mould of two different sizes of examination mould group is separated; I. remove the upper adjustment plate on reaction frame, pack the first top soil adjustment plate, the second native adjustment plate in top into, two top native adjustment plate central authorities have the first perforate, the second perforate, two perforates and inner through hole same size; J. lifting jack is closely fixed on to adjustment plate and second under reaction frame with nut and pushes up between native adjustment plate, the long examination mould that is full of soil is closely fixed between two native adjustment plates in top of lifting jack top with nut; If k. will operate soil triaxial test, aluminum being tried to mould assembles in inner side and puts rubber membrane, temporary transient fixing with O shape ring, load onto the action that the conduit of vacuum air pump vacuumizes, rubber membrane is close on aluminum examination mould, then correspond on reaction frame, by lifting jack, examination body is ejected to aluminum examination mould.
If operate other soil testings or try body, do not need rubber membrane to be coated person, directly by lifting jack, sincere body is ejected to use.
Between step f, g, can increase by a decompress(ion) step,, as made the molality examination body of densification, also can carry out the action of decompress(ion).
This equipment is comprised of a control pressurer system, a reaction frame, a piston pneumatic cylinder and an examination mould group, this control pressurer system air feed and the action of control piston pneumatic cylinder, piston pneumatic cylinder be installed in reaction frame one on adjust tray bottom, and the lower adjustment plate installing examination mould group of reaction frame, and the pressure axis push rod that makes piston pneumatic cylinder is correct movable in the inner through hole of examination mould group, and then the examination body in correct densification inner through hole.
The first examination mould, the second examination mould are the first endoporus of tool perforation, the hollow cylinder of the second endoporus, orchid is managed at cylinder two ends and flange is provided with the perforate that number is worn lock for bolt, fitted bolt is to form a lock solid structure, the screw that the first examination mould, the second examination bottom surface, mould one end have annular permeable spacer bolt lock to establish, fitted bolt is to form a fixed sturcture; A long examination mould is the hollow cylinder of the 3rd endoporus of tool perforation, orchid is managed at cylinder two ends, and this flange is hollow plectane, and cylinder bottom surface two end flanges are provided with number and wear lock perforate for bolt, fitted bolt is to form a lock solid structure, and there is the staggered draining groove of cross bottom surface, one end; The first annular permeable pad, the second annular permeable pad, two shim pack are loaded on two interfaces of the first hollow cylinder examination mould, the second hollow cylinder examination mould, the 3rd hollow cylinder examination mould, and use individually bolt to be fixed on the bottom surface, one end of the first examination mould, the second examination mould; The assembling of examination mould group is from top to bottom sequentially, overlapping two first and second examination moulds, and the bottom surface of top the first examination mould is fixed at its interface with the first annular permeable pad use bolt, then with two first and second examination moulds of bolt-locking; Long examination mould storehouse is below the first examination mould, the second examination mould, and its interface makes to be fixed by bolts to the bottom surface of the second examination mould with the second annular permeable pad, then with bolt-locking the second examination mould and long examination mould; Cross staggered draining groove in long examination mould bottom is examination body bottom drainage path, in long examination mould the 3rd endoporus bottom, adds the first permeable stone that is highly same as rhone trench depth.
Piston pneumatic cylinder, it uses the pressure of air to carry out the promotion of pressure axis push rod and then the densification of molality examination body is made, under pressure axis push rod, end device one adds cover clamp, and is designed with several permeable grooves and increases drainage paths, adds the second permeable stone adding cover clamp bottom.
Control pressurer system comprises: number tensimeters and several pressure regulator valves are installed on the pipeline that an air reservoir is connected this piston pneumatic cylinder, by the adjustment of several pressure regulator valves and the pressure value after the manometric demonstration immediately of number adjustment, pressure is effectively controlled, one air compressor machine connects air reservoir, supplements pressure gas while making air reservoir insufficient pressure.
The invention has the beneficial effects as follows: with machinery, replace artificial mode and carry out, examination weight is controlled easily, facility simple to operate, examination body possesses complete globality, and tight ness rating is evenly distributed, and can not produce level, and the discontinuous phenomenon in interface, accelerated the process of follow-up state of saturation.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of the embodiment of the present invention;
Fig. 2 is the combination dissected figure of the embodiment of the present invention;
Fig. 3 is the perspective exploded view of invention examination mould group;
Fig. 4 is the combination dissected figure that the present invention tries mould group;
Fig. 5 is the planimetric map that the present invention ejects examination body;
Fig. 6 is the action cut-away view that the present invention ejects examination body.
In figure, indicate: 10, reaction frame, 11, water butt, 12, upper adjustment plate, 13, lower adjustment plate, 20, examination mould group, 201, inner through hole, 21, the first examination mould, 211, the first endoporus, 22, the second examination mould, 221, the second endoporus, 23, long examination mould, 231, the 3rd endoporus, 24, the first annular permeable pad, 25, the second annular permeable pad, 30, piston pneumatic cylinder, 31, pressure axis push rod, 32, add cover clamp, 321, permeable groove, 33, the second permeable stone, 40, the first permeable stone, 50, lifting jack, 51, aluminum examination mould, 52, rubber membrane, 53, O shape ring, 54, conduit, 60, the first native adjustment plate in top, 61, the first perforate, 70, the second native adjustment plate in top, 71, the second perforate.
Embodiment
By reference to the accompanying drawings, the present invention is described in further detail.
As shown in the figure, the present invention makes the method for molality soil examination body, it is characterized in that: the method comprises: a. puts into reaction frame 10 water butt 11 of filled with water, so that examination system is done system, is held in the state in water; B. the first examination mould 21, the second examination mould 22, long examination mould 23 are locked according to order, but at the above two or must first lock the annular permeable pad 25 of the first annular permeable pad 24, second in both interval afterwards, then will 20 careful the moving on on reaction frame 10 of examination mould group; C. piston pneumatic cylinder 30 is locked in the upper adjustment plate 12 on reaction frame 10, locks rear adjustment vertical and horizontal; D. by long examination mould 23 the 3rd endoporus 231 bottoms below the first permeable stone 40 placements, and examination mould group 20 is locked in reaction frame 10 lower adjustment plate 13 below, after completing, whether attention examination mould group 20 has parallel and vertical with piston pneumatic cylinder 30 pressure axis push rod 31 above; E. the soil fully mixing and stirring with degassed water is inserted to the first endoporus 211, the second endoporus 221, the 3rd endoporus 231 of the first examination mould 21, the second examination mould 22, long examination mould 23; F. adjusting pressure regulator valve promotion piston pneumatic cylinder 30 pressurizes; G. try body densification complete after, use pressure regulator valve that the pressure in piston pneumatic cylinder 30 is all released, then the rises that now pressure axis push rod 31 can be slowly, then just can shift out reaction frame 10 examination mould group 20 is pulled down; H. after pulling down, by second of 20 two different sizes of examination mould group, try mould 22,23 separation of long examination mould; I. remove the upper adjustment plate 12 on reaction frame 10, pack the first top soil adjustment plate 60 into, the second top native adjustment plate 70, two top native adjustment plate central authorities have the first perforate 61, the second perforate 71, two perforates and inner through hole 201 same sizes; J. lifting jack 50 is closely fixed between 10 times adjustment plates 13 of reaction frame and the second native adjustment plate 70 in top with nut, the long examination mould 23 that is full of soil is closely fixed between two native adjustment plates in top of lifting jack 50 tops with nut; If k. will operate soil triaxial test, aluminum being tried to mould 51 assembles and in inner side, puts rubber membrane 52, temporarily fixing with O shape ring 53, load onto the action that the conduit 54 of vacuum air pump vacuumizes, rubber membrane 52 is close on aluminum examination mould 51, then correspond on reaction frame 10, by lifting jack 50, examination body is ejected to aluminum examination mould 51.If operate other soil testings or examination body, do not need the coated person of rubber membrane 52, directly by lifting jack 50, sincere body is ejected to use.Between step f, g, can increase by a decompress(ion) step,, as made the molality examination body of densification, also can carry out the action of decompress(ion).This equipment is comprised of a control pressurer system, a reaction frame 10, a piston pneumatic cylinder 30 and an examination mould group 20, this control pressurer system air feed and 30 actions of control piston pneumatic cylinder, piston pneumatic cylinder 30 be installed in reaction frame 10 one on adjustment plate 12 bottoms, and the lower adjustment plate 13 installing examination mould groups 20 of reaction frame 10, and the pressure axis push rod 31 that makes piston pneumatic cylinder 30 is correct movable in the inner through hole 201 of examination mould group 20, and then the examination body in correct densification inner through hole 201.Examination mould group 20 comprises: the first endoporus 211 that the first examination mould 21, the second examination mould 22 connect for tool, the hollow cylinder of the second endoporus 221, orchid is managed at cylinder two ends and flange is provided with the perforate that number is worn lock for bolt, fitted bolt is to form a lock solid structure, the screw that the first examination mould 21, the second examination mould 22 bottom surfaces, one end have annular permeable spacer bolt lock to establish, fitted bolt is to form a fixed sturcture; A hollow cylinder that long examination mould 23 is the 3rd endoporus 231 of tool perforation, orchid is managed at cylinder two ends, and this flange is hollow plectane, and cylinder bottom surface two end flanges are provided with number and wear lock perforate for bolt, fitted bolt is to form a lock solid structure, and there is the staggered draining groove of cross bottom surface, one end; The annular permeable pad 25 of the first annular permeable pad 24, second, two shim pack are loaded on two interfaces of the first hollow cylinder examination mould 21, the second hollow cylinder examination mould 22, the 3rd hollow cylinder examination mould 23, and use individually bolt to be fixed on the bottom surface, one end of the first examination mould 21, the second examination mould 22; 20 assemblings of examination mould group are from top to bottom sequentially, overlapping two first and second examination moulds, and the bottom surface of top the first examination mould 21 is fixed at its interface with the first annular permeable pad 24 use bolts, then with two first and second examination moulds of bolt-locking; Long examination mould 23 storehouses are below the first examination mould 21, the second examination mould 22, and its interface makes to be fixed by bolts to the bottom surface of the second examination mould 22 with the second annular permeable pad 25, then with bolt-locking the second examination mould 22 and long examination mould 23; The staggered draining groove of long examination mould 23 bottom crosses is examination body bottom drainage path, in long examination mould 23 the 3rd endoporus 231 bottoms, adds the first permeable stone 40 that is highly same as rhone trench depth.Piston pneumatic cylinder 30, it uses the pressure of air to carry out the promotion of pressure axis push rod 31 and then the densification of molality examination body is made, 31 times end devices one of pressure axis push rod add cover clamp 32, and are designed with several permeable grooves 321 and increase drainage paths, add the second permeable stone 33 adding cover clamp 32 bottoms.Control pressurer system comprises: number tensimeters and several pressure regulator valves are installed on the pipeline that an air reservoir is connected this piston pneumatic cylinder, by the adjustment of several pressure regulator valves and the pressure value after the manometric demonstration immediately of number adjustment, pressure is effectively controlled, one air compressor machine connects air reservoir, supplements pressure gas while making air reservoir insufficient pressure.
Method and apparatus of the present invention institute is mentioned above.Wherein the present invention is in molality examination body manufacturing process, adopt the required whole soil examination body soil amount of test design, after uniformly mixing with degassed water, insert in apparatus of the present invention, with 30 pressurizations of piston pneumatic cylinder, promote pressure axis push rod 31 and add cover clamp 32 to carry out densification making, examination body possesses complete globality, and tight ness rating is evenly distributed.Because long examination mould 23 possesses height of 200mm, therefore the examination height that made completes can reach 200mm, and molality examination body is enough used in every soil shop experiment after releasing via hydraulic jack 50, unnecessary examination body length also can sample separately, carries out Multitest work simultaneously.Because examination body manufacturing process is that soil densification trip is, the number of the length of its drainage path and draining number of interfaces, is to affect the key factor whether densification completes.
The present invention is between examination mould, the first examination mould 21 and the second examination mould 22, and second examination mould 22 all have first and second annular permeable pad of installing with long examination mould 23, its function is to shorten drainage path, that is increases draining number of interfaces and reduce soil thickness, therefore can be in densification process, utilize the position of first and second annular permeable pad of installing, make its pore water have the pipeline of draining, the pore water pressure that will exceed the quata dissipates, and accelerates densification and completing that examination system is done.
Claims (7)
1. a method of making molality soil examination body, is characterized in that:
The method comprises: a. puts into reaction frame (10) water butt (11) of filled with water, so that examination system is done system, is held in the state in water;
B. the first examination mould (21), the second examination mould (22), long examination mould (23) are locked according to order, but at the above two or must first lock the first annular permeable pad (24), the second annular permeable pad (25) in both interval afterwards, then will try careful the moving on on reaction frame (10) of mould group (20);
C. the upper adjustment plate (12) piston pneumatic cylinder (30) being locked on reaction frame (10) is upper, locks rear adjustment vertical and horizontal;
D. by long examination mould (23) the 3rd endoporus (231) bottom below the first permeable stone (40) placement, and trying mould group (20), to be locked in reaction frame (10) lower adjustment plate (13) below upper, after completing, whether attention examination mould group (20) has parallel and vertical with piston pneumatic cylinder (30) pressure axis push rod (31) above;
E. the soil fully mixing and stirring with degassed water is inserted to the first endoporus (211), the second endoporus (221), the 3rd endoporus (231) of the first examination mould (21), the second examination mould (22), long examination mould (23);
F. adjusting pressure regulator valve promotion piston pneumatic cylinder (30) pressurizes;
G. try body densification complete after, use pressure regulator valve that the pressure in piston pneumatic cylinder (30) is all released, the rise that now pressure axis push rod (31) can be slowly, then just can shift out reaction frame (10) and then will try mould group (20) and pull down;
H. after pulling down, will try the second examination mould (22) of (20) two different sizes of mould group, the separation of long examination mould (23);
I. remove the upper adjustment plate (12) on reaction frame (10), pack the first top soil adjustment plate (60), the second top native adjustment plate (70) into, two top native adjustment plate central authorities have the first perforate (61), the second perforate (71), two perforates and inner through hole (201) same size;
J. lifting jack (50) is closely fixed on to adjustment plate (13) and second under reaction frame (10) with nut and pushes up between native adjustment plate (70), the long examination mould (23) that is full of soil is closely fixed between two native adjustment plates in top of lifting jack (50) top with nut;
If k. will operate soil triaxial test, aluminum being tried to mould (51) assembles and in inner side, puts rubber membrane (52), temporarily fixing with O shape ring (53), load onto the action that the conduit (54) of vacuum air pump vacuumizes, rubber membrane (52) is close on aluminum examination mould (51), then correspond to reaction frame (10) upper, by lifting jack (50), examination body is ejected to aluminum examination mould (51).
2. the method for making molality soil examination body according to claim 1, is characterized in that: if operate other soil testings or try body, do not need rubber membrane (52) to be coated person, directly by lifting jack (50), sincere body is ejected to use.
3. the method for making molality soil examination body according to claim 1, is characterized in that: between step f, g, can increase by a decompress(ion) step,, as made the molality examination body of densification, also can carry out the action of decompress(ion).
4. one kind for realizing the equipment of making molality soil examination body method described in claim 1, it is characterized in that: this equipment is by a control pressurer system, one reaction frame (10), one piston pneumatic cylinder (30) and an examination mould group (20) form, this control pressurer system air feed and control piston pneumatic cylinder (30) action, piston pneumatic cylinder (30) be installed in reaction frame (10) one on adjustment plate (12) bottom, and the lower adjustment plate (13) of reaction frame (10) installing examination mould group (20), and the pressure axis push rod (31) that makes piston pneumatic cylinder (30) is correct movable in the inner through hole (201) of examination mould group (20), and then the examination body in correct densification inner through hole (201).
5. equipment according to claim 4, it is characterized in that: examination mould group (20) comprising: the first endoporus (211) that the first examination mould (21), the second examination mould (22) connect for tool, the hollow cylinder of the second endoporus (221), orchid is managed at cylinder two ends and flange is provided with the perforate that number is worn lock for bolt, fitted bolt is to form a lock solid structure, the screw that the first examination mould (21), the second examination mould (22) bottom surface, one end have annular permeable spacer bolt lock to establish, fitted bolt is to form a fixed sturcture; A long examination mould (23) is the hollow cylinder of the 3rd endoporus (231) of tool perforation, orchid is managed at cylinder two ends, this flange is hollow plectane, cylinder bottom surface two end flanges are provided with number and wear lock perforate for bolt, fitted bolt is to form a lock solid structure, and there is the staggered draining groove of cross bottom surface, one end; The first annular permeable pad (24), the second annular permeable pad (25), two shim pack are loaded on two interfaces of the first hollow cylinder examination mould (21), the second hollow cylinder examination mould (22), the 3rd hollow cylinder examination mould (23), and use individually bolt to be fixed on the bottom surface, one end of the first examination mould (21), the second examination mould (22); Examination mould group (20) assembling is from top to bottom sequentially, overlapping two first and second examination moulds, its interface is used bolt to be fixed on the bottom surface that mould (21) is tried in top first with the first annular permeable pad (24), then with two first and second examination moulds of bolt-locking; Long examination mould (23) storehouse is in the first examination mould (21), the second examination mould (22) below, its interface makes to be fixed by bolts to the bottom surface of the second examination mould (22) with the second annular permeable pad (25), then with bolt-locking the second examination mould (22) and long examination mould (23); Cross staggered draining groove in long examination mould (23) bottom is examination body bottom drainage path, in long examination mould (23) the 3rd endoporus (231) bottom, adds the first permeable stone (40) that is highly same as rhone trench depth.
6. equipment according to claim 4, it is characterized in that: piston pneumatic cylinder (30), it uses the pressure of air to carry out the promotion of pressure axis push rod (31) and then the densification of molality examination body is made, the lower end device one of pressure axis push rod (31) adds cover clamp (32), and be designed with several permeable grooves (321) and increase drainage path, add the second permeable stone (33) adding cover clamp (32) bottom.
7. equipment according to claim 4, it is characterized in that: control pressurer system comprises: number tensimeters and several pressure regulator valves are installed on the pipeline that an air reservoir is connected this piston pneumatic cylinder, by the adjustment of several pressure regulator valves and the pressure value after the manometric demonstration immediately of number adjustment, pressure is effectively controlled, one air compressor machine connects air reservoir, supplements pressure gas while making air reservoir insufficient pressure.
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| CN201310657731.9A CN103674643A (en) | 2013-12-09 | 2013-12-09 | Method and equipment for preparing remolded soil specimen |
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| CN201310657731.9A CN103674643A (en) | 2013-12-09 | 2013-12-09 | Method and equipment for preparing remolded soil specimen |
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| CN103674643A true CN103674643A (en) | 2014-03-26 |
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| CN201310657731.9A Pending CN103674643A (en) | 2013-12-09 | 2013-12-09 | Method and equipment for preparing remolded soil specimen |
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| CN104198254A (en) * | 2014-09-18 | 2014-12-10 | 华北水利水电大学 | Density-controllable geotechnical triaxial sample preparation device |
| CN104777016B (en) * | 2015-01-14 | 2017-10-24 | 南京工业大学 | Slurry consolidation sample preparation equipment and use method thereof |
| CN104777016A (en) * | 2015-01-14 | 2015-07-15 | 南京工业大学 | Slurry consolidation sample preparation equipment and use method thereof |
| CN104749345A (en) * | 2015-03-30 | 2015-07-01 | 国家电网公司 | Testing device and testing method of padding frost heaving characteristic |
| CN104749345B (en) * | 2015-03-30 | 2019-03-12 | 中铁西北科学研究院有限公司 | A kind of experimental rig and test method of filler frost heaving characteristic |
| CN106370541A (en) * | 2016-10-02 | 2017-02-01 | 黑龙江八农垦大学 | Frictional wear test bench for soil touching component of agricultural machine |
| CN107255586A (en) * | 2017-07-01 | 2017-10-17 | 华北理工大学 | Obturation and country rock Composite rockmass routine test test sample-producing die and preparation method |
| CN107255586B (en) * | 2017-07-01 | 2019-12-03 | 华北理工大学 | Obturation and country rock Composite rockmass routine test test sample-producing die and production method |
| CN108176103A (en) * | 2017-12-18 | 2018-06-19 | 长安大学 | A kind of filter-pressing device and the soil moisture extraction element and extracting method based on it |
| CN108176103B (en) * | 2017-12-18 | 2020-04-28 | 长安大学 | Filter pressing device, soil moisture extraction device based on filter pressing device and extraction method |
| CN108871919A (en) * | 2018-07-20 | 2018-11-23 | 交通运输部天津水运工程科学研究所 | A kind of solidified earth test knocking knob split cavity device for producing molds |
| CN110132641A (en) * | 2019-05-28 | 2019-08-16 | 蔡启浩 | A kind of soil collecting device and its acquisition method |
| CN110646273A (en) * | 2019-09-02 | 2020-01-03 | 山东大学 | Mold for preparing rock-soil model test specimen and preparation method |
| CN110646273B (en) * | 2019-09-02 | 2020-11-06 | 山东大学 | Mold for preparing rock-soil model test specimen and preparation method |
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