LU101323A1 - Dynamic testing device for mechanical properties of pile and soil - Google Patents

Dynamic testing device for mechanical properties of pile and soil Download PDF

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Publication number
LU101323A1
LU101323A1 LU101323A LU101323A LU101323A1 LU 101323 A1 LU101323 A1 LU 101323A1 LU 101323 A LU101323 A LU 101323A LU 101323 A LU101323 A LU 101323A LU 101323 A1 LU101323 A1 LU 101323A1
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plate
gear
rubber film
film cylinder
cylinder
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LU101323A
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German (de)
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LU101323B1 (en
Inventor
Junkun Tan
Shengnan He
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Shanghai Minie Tech Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00—Testing foundations or foundation structures

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The present disclosure relates to the technical field of civil engineering, in particular to a dynamic testing device for mechanical properties of piles and soils, including a top plate, a support plate and a bottom plate fixedly connected in series through a set of support columns from top to bottom. A film box is embodied and installed between the support plate and the bottom plate. The film box includes a circular rubber film cylinder, a bottom supporting board and a cover plate; the bottom supporting board is coaxially embedded in the middle of the bottom plate, the bottom supporting board is arranged at the lower end of the rubber film cylinder, and the cover plate is used for sealing the upper port of the rubber film cylinder. The cover plate passes through the support plate and is fixedly connected to the top plate through a set of mounting columns; a vertical loading device is arranged in the middle of the top plate, and at least one horizontal loading device is arranged on the outer ring of the rubber film cylinder. The present disclosure controls the displacement stroke of each telescopic rod. When the strokes of the telescopic rods are the same, the corresponding horizontal pressures are applied to the piles in the respective directions, and different states of different side pressures are realized when the strokes are different, which is more flexible and suitable for to different experimental requirements.

Description

[0001] The present disclosure relates to the technical field of civil engineering, in particular to a dynamic testing device for mechanical properties of piles and soils.
BACKGROUND [0002] With the rapid development of China's urban construction, in order to build more building area within the smaller land area, buildings have to move toward high-rise buildings. Therefore, in recent years, more and more high-rise buildings and super high-rise buildings have been built. These buildings have high requirements on the bearing capacity of the foundation basement. The pile foundation is widely used in foundation engineering as a main foundation form. With the accumulation of practical experience of pile foundation engineering and the deepening of theoretical research, the utilization of pile foundation and the use environment tends to be diversified. For example, retaining piles are mostly used for construction support retaining soil. However, in order to give full play to the role of retaining piles and reduce engineering cost, the retaining piles are used for vertical bearing. Therefore, it is of practical engineering significance to study the bearing capacity of retaining piles.
[0003] In existing test device, a thrust in a fixed direction can often be applied only at a position outside the pile column, but in actual engineering, the force of the soil layer structure is extremely complicated, and the shear force of the pile soil may be displaced with the direction of the side pressure, which has an effect on the pile. The existing test device does not have the function of simulating the above working conditions and cannot adapt to different experimental requirements.
SUMMARY OF THE DISCLOSURE
SUNPT 1905 5LU
22.07.2019 [0004] In order to make up for the deficiencies of the prior art, the a dynamic testing device for mechanical properties of piles and soils provided by the present disclosure can solve the problem of the mechanical property test that the existing device can not simulate the shear force of the pile soil subjected to the displacement of the direction angle of the side pressure.
[0005] The technical solution adopted by the present disclosure to solve its technical problems is as follows: A dynamic testing device for mechanical properties of piles and soils provided by the present disclosure, including a top plate, a support plate and a bottom plate fixedly connected in series from top to bottom through a set of support columns; a film box is embodied installed between the support plate and the bottom plate, the film box includes a circular rubber film cylinder, a bottom supporting board and a cover plate; the bottom supporting board is coaxially embedded in the middle of the bottom plate, the bottom supporting board is disposed at a lower end of the rubber film cylinder; the cover plate is used to seal an upper port of the rubber film cylinder, the cover plate passes through the support plate and is fixedly connected to the top plate through a set of mounting posts; the top plate is provided with a vertical loading device in the middle portion; the vertical loading device is used for applying vertical pressure; a pile-soil is placed in the rubber film cylinder, and a set of horizontal pressure sensors are embedded in the pile-soil;
[0006] at least one horizontal loading device is arranged on the outer ring of the rubber film cylinder, the horizontal loading device includes an elastic band, and the elastic band is curved and is tangent to the outer circle of the rubber film cylinder; a pair of cylinders are fixedly coupled to the two ends of the elastic band, the cylinder is rotatably installed between the support plate and the bottom plate, two of the cylinders is driven to rotate synchronously by a driving device; the bottom plate is provided with two sliding slots, each of the sliding slots is slidably connected with a slider; a sliding column is fixedly installed on the slider, wherein one sliding column is located on one side of the elastic band near the rubber film cylinder, and the other
SUNPT19055LU
22.07.2019
LU101323 sliding column is located on the side of the elastic band facing away from the rubber film cylinder.
[0007] Preferably, the driving device includes a first gear fixedly mounted on an upper end of one of the cylinders, a second gear is fixedly mounted on the upper end of the other cylinder; an internal ring gear is rotatably installed on an upper side of the support plate, the first gear meshes with the internal ring gear; a reversing gear is disposed on an inner side of the internal ring gear, the reversing gear is rotatably installed on the support plate, the reversing gear meshes with the second gear.
[0008] Preferably, a rotating shaft of the first gear or the second gear penetrates the top plate and a first servo motor is fixedly mounted at the end; the first servo motor is fixedly mounted on the top plate.
[0009] Preferably, the synchronizing device includes a second servo motor; the second servo motor is fixedly mounted at the bottom of the bottom plate, a rotating shaft of the second servo motor penetrates an avoidance hole of the bottom plate and a drive gear is fixedly mounted at the end; the upper surface of the bottom plate is slidably installed two racks in parallel, the drive gear is located between the two racks, the two racks matches with the drive gear respectively; each of the racks is fixedly mounted with a connecting rod, the connecting rod is fixedly connected with a sliding bar, and the sliding bar is slidably installed on the bottom plate, the sliding column is fixedly mounted on a sliding bar.
[0010] Preferably, the elastic band is divided into an upper tightening band and a lower tightening band, the outer ring of the cylinder is fixedly connected to a curved bump corresponding to the lower tightening band.
SUNPT19055LU
22.07.2019 [0011] The advantageous effects of the present disclosure are as follows:
[0012] The present disclosure can realize different experimental comparisons. By controlling the displacement stroke of each telescopic rod, when the strokes of the telescopic rods are the same, correspondingly the identical horizontal pressures are applied to the piles in the respective directions, and different side pressures can be achieved when the strokes of the telescopic rods are different, which is flexible and adaptable to different experimental requirements.
BRIEF DESCRIPTION OF THE DRAWINGS [0013] The present disclosure will now be further described with reference to the accompanying drawings.
[0014] Figure 1 is a schematic view of the structure of the present disclosure;
[0015] Figure 2 is a front view of the present disclosure;
[0016] Figure 3 is a schematic view showing the structure of Figure 1 after removing the top plate;
[0017] Figure 4 is a schematic view showing the structure of Figure 3 after removing the support plate and the driving device;
[0018] Figure 5 is a partial enlarged view of part E in Figure 4;
[0019] Figure 6 is a schematic view showing the structure of Figure 3 after the film box is removed and the viewing angle is changed;
[0020] Figure 7 is a schematic view showing the structure of the film box of the present disclosure;
[0021] Figure 8 is a schematic view of the stress point of the present disclosure at A;
[0022] Figure 9 is a schematic illustration of the stress point of the present disclosure at B.
DETAILED DESCRIPTION OF THE EMBODIMENTS
SUNPT19055LU
22.07.2019 [0023] In order to make the technical means, creative features, achievement goals and effects achieved by the present disclosure easy to understand, the present disclosure will be further described below in conjunction with specific embodiments.
[0024] As shown in Figure 1 to Figure 9, a dynamic testing device for mechanical properties of piles and soils provided by the present disclosure, including a top plate 11, a support plate 12 and a bottom plate 13 fixedly connected in series from top to bottom through a set of support columns 15. A film box 3 is embodied installed between the support plate 12 and the bottom plate 13, the film box 3 includes a circular rubber film cylinder 31, a bottom supporting board 32 and a cover plate 33. The bottom supporting board 32 is embedded in the middle of the bottom plate 13, the bottom supporting board 32 is disposed at a lower end of the rubber film cylinder 31 to block the lower port of the rubber film cylinder 31. The cover plate 33 is used to seal an upper port of the rubber film cylinder 31, the cover plate passes through the support plate 12 and is fixedly connected to the top plate 11 through a set of mounting posts 14. The rubber film cylinder 31 is disposed on the radially outer side of the pile column 22, and when the pile column 22 is inserted into the film box 3, a receiving cavity for accommodating the pile soil is provided between the rubber film cylinder 31 and the pile column 22. The pile-soil is placed in the receiving cavity, and a set of horizontal pressure sensors are embedded in the pile-soil for collecting the horizontal thrust force applied in different directions.
[0025] A vertical loading device is arranged in the middle of the top plate 11. The vertical loading device is used to exert vertical pressure on the pile column 22. The vertical loading device includes a servo hydraulic machine 21 fixed in the middle of the top plate 11. The lower end of the lower pressing rod of the servo hydraulic machine 21 penetrates the top plate 11 and is in contact with the top end of the pile column 22. A displacement sensor 23 is arranged on the end surface of the lower pressing rod used for contacting the pile column 22. The displacement sensor 23 is connected with a pressure sensor 24, and the pressure sensor 24 is embodied
SUNPT 1905 5LU
22.07.2019 installed between displacement sensor 23 and pile column 22. In this structure, servo hydraulic machine 21 applies vertical pressure to pile column 22 via the lower pressing rod. The displacement sensor 23 is used for detecting the displacement of pile column 22, and the pressure sensor 24 is used for detecting pressure applied by the servo hydraulic machine 21 on pile column 22. These are the conventional test means in the prior art, and here is not be described in detail. At least one horizontal loading device is provided on the outer ring of rubber film cylinder 31. The horizontal loading device includes an elastic band 51, which is curved and tangent to the outer circle of the rubber film cylinder 31. The two ends of the elastic band 51 are respectively fixedly connected with a cylinder 52. The cylinder 52 is rotatably installed between the support plate 12 and the bottom plate 13. The cylinder 52 are rotated synchronously by a driving device, and the cylinder 52 are rotated so that the elastic band 51 is wound up on the cylinder 52, thus making the elastic band 51 tense and applying lateral thrust on the rubber film cylinder 31. The bottom plate 13 is provided with two sliding slots 131, each sliding slot is slidably connected with a slider 53, and the slider 53 is fixed with a sliding column 54. one of the sliding column 54 is located on one side of the elastic band 51 near the rubber film cylinder 31, the other sliding column 54 is located on the side of the elastic belt 51 away from the rubber film cylinder 31. When one sliding column 54 is moved far from the rubber film cylinder 31, the other sliding column 54 is moved close to the rubber film cylinder 31. The two sliding columns 54 are driven by a synchronous device to move away from each other. After the relative movement of the two sliding columns 54, the position of the corresponding elastic band 51 contacting the rubber film cylinder 31 changes from point A to point B, which is equivalent to the pressure of the elastic band 51 applied on the rubber film cylinder 31 shifting from point A to point B, so as to simulate the influence of the offset dynamic pressure on the shear properties of pile and soil, for studying the influence of complex dynamic environmental conditions on the shear properties of pile and soil.
SUNPT19055LU
22.07.2019 [0026] As an embodiment of the present disclosure, the driving device includes a first gear fixed at the upper end of one cylinder 52 and a second gear 42 fixed at the upper end of the other cylinder 52. The upper side of the support plate 12 rotatably installed with an internal ring gear 43. The first gear 41 matches with the internal ring gear 43. The inner side of the internal ring gear 43 is also provided with a reversing gear 44, and the reversing gear 44 rotatably installed in the support plate 12. The reversing gear 44 meshes with the second gear 42. A rotating shaft of the first gear 41 or the second gear 42 passes through the top plate 11 and the first servo motor 45 is fixed connected at the end. The first servo motor 45 is fixed on the top plate 11. After the rotation of the internal ring gear 43, the rotation of the reversing gear 44 causes the first gear 41 and the second gear 42 to rotate in opposite directions, thereby applying the same winding force to the elastic band 51, so that the elastic band 51 is straightened to apply the pressure to the rubber film cylinder 31.
[0027] As an embodiment of the present disclosure, the synchronizing device includes a second servo motor 71. The second servo motor 71 is fixedly mounted at the bottom of the bottom plate 13, a rotating shaft of the second servo motor 71 penetrates an avoidance hole of the bottom plate 13 and a drive gear 72 is fixedly mounted at the end. The upper surface of the bottom plate 13 is slidably installed two racks 73 in parallel, the drive gear 72 is located between the two racks 73, the two racks 73 matches with the drive gear 72 respectively. Each of the racks 73 is fixedly mounted with a connecting rod 74, the connecting rod 74 is fixedly connected with a sliding bar 75, and the sliding bar 75 is slidably installed on the bottom plate 13, the sliding column 54 is fixedly mounted on a sliding bar 75. When the driving gear 72 is rotated by a predetermined angle, the corresponding two racks 73 are separated from each other at a constant speed, so that the contact point of the elastic band 51 and the rubber film cylinder 31 is moved from the point A to the point B, thereby reducing the influence of the pressure provided by the elastic band 51 during the movement.
SUNPT19055LU
22.07.2019 [0028] As an embodiment of the present disclosure, the elastic band 51 is divided into the upper tightening band 511 and the lower tightening band 512. The outer ring of the cylinder 52 corresponds to the lower tightening band 51, which is fixed and connected with an curved bump 9. When the cylinder 52 is rotated, the lower tightening band 512 is wound around the outer ring of the curved bump 9. In practical work, with the increase of soil depth, the lateral pressure on the corresponding pile column 22 will gradually increase. When the cylinder 52 is wound, the lower tightening band 512 is wound in the outer ring of the curved bump 9. Compared with the upper tightening band 511, the lower tightening band 512 is more straightened, so as to provide a pressure which is larger than the pressure provided by the upper tightening band 511.
[0029] The working principle of the present disclosure is as follows:
[0030] The tester prefabricates the pile column 22, inserts the pile column 22 into the film box 3, and after the pile-soil is loaded into the rubber film cylinder 31 and compacted, the cover plate 33 is sealed the upper port of the rubber film cylinder 31.
[0031] After the cover plate 33 is sealed, the top plate 11 is fixed on the upper end of the mounting column 14, and the servo hydraulic machine 21 is fixedly connected to the middle of the top plate 11, and the lower pressing rod is provided with a displacement sensor 23 on the end surface contacting the pile column 22. The pressure sensor 24 is disposed between the displacement sensor 23 and the pile column 22.
[0032] The rotation of the first servo motor 45 drives the rotation of the cylinder 52 while driving the ring gear 43 to rotate, and the rotation of the reversing gear 44 causes the first gear 41 and the second gear 42 to rotate in opposite directions, thereby applying the identical winding force to the elastic band 51 to cause the elastic band 51 to be straightened,so as to apply pressure to the rubber film cylinder 31, to control the rotation angle of the first servo motor 45, so that an initial pressures of different sizes are obtained, to study the effect of different pressures on the mechanical properties of piles and soils at the same position. The servo hydraulic machine 21 is
SUNPT19055LU
22.07.2019
LU101323 started to apply vertical pressure to the pile column 22, and the pile column 22 moves in the vertical direction under the vertical pressure. The pressure and displacement of the pile column 22 are obtained by the pressure sensor 24 and the displacement sensor 23, respectively. According to the calculation method of the prior art, the shear force of the pile-soil contact surface is calculated.
[0033] When it is necessary to study the influence of the offset pressure on the mechanical properties of the pile-soil, the driving gear 72 is rotated by a predetermined angle, the corresponding two racks 73 are separated from each other at a constant speed, and the position of the corresponding elastic band 51 contacting the rubber fdm cylinder 31 is changed from point A to point B, which is equivalent to the pressure of the elastic band 51 applied to the rubber film cylinder 31 is transferred from point A to point B, thereby simulating the influence of the dynamic pressure of the offset on the shear properties of the pile-soil, so as to study the influence of the complex dynamic environmental conditions on the shear properties of the pile-soil.
[0034] While the present disclosure has been described by way of specific embodiments, it should be understood by the ordinary skilled person in the art that various modifications and equivalent replacement may be made to the present disclosure without departing from the scope of the present disclosure. In addition, various modifications can be made to the present disclosure according to specific situation or materials, which is not out of the the scope of the present disclosure. Therefore, the present disclosure is not limited to the specific embodiments disclosed, but all the embodiments falling within the scope of the appended claims.

Claims (5)

1. Dynamische Testvorrichtung für die mechanischen Eigenschaften von Pfählen und Böden umfassend eine Deckplatte (11), eine Trageplatte (12) und eine Bodenplatte (13), die durch einen Satz von Stützsäulen (15) fest von oben nach unten in Reihe geschaltet sind; eine Filmbox (3) ist zwischen der Trageplatte (12) und der Bodenplatte (13) eingebaut ausgeführt, die Filmbox (3) umfasst einen kreisförmigen Gummifilmzylinder (31), eine Bodenstützplatte (32) und eine Abdeckplatte (33); die Bodenstützplatte (32) ist koaxial in die Mitte der Bodenplatte (13) eingebettet, die Bodenstützplatte (32) ist an einem unteren Ende des Gummifolienzylinders (31) angeordnet; die Abdeckplatte (33) dient zum Abdichten einer oberen Öffnung des Gummifilmzylinders (31), die Abdeckplatte (33) durchgreift die Trageplatte (12) und ist über einen Satz von Montagepfosten (14) fest mit der Deckplatte (11) verbunden; die Deckplatte (11) ist im mittleren Bereich mit einer vertikalen Ladeeinrichtung versehen; die vertikale Ladeeinrichtung wird zum Ausüben von vertikalem Druck verwendet; der Boden der vertikalen Ladeeinrichtung ist mit einem vertikalen Drucksensor und einem Verschiebungssensor versehen; in den Gummifilmzylinder (31) wird einen Pfahl-Boden eingelegt und in den Pfahl-Boden wird ein Satz horizontaler Drucksensoren eingebettet;1. Dynamic test device for the mechanical properties of piles and floors comprising a cover plate (11), a support plate (12) and a base plate (13), which are connected in series by a set of support columns (15) from top to bottom; a film box (3) is installed between the support plate (12) and the base plate (13), the film box (3) comprises a circular rubber film cylinder (31), a base support plate (32) and a cover plate (33); the floor support plate (32) is coaxially embedded in the center of the floor plate (13), the floor support plate (32) is arranged at a lower end of the rubber film cylinder (31); the cover plate (33) serves to seal an upper opening of the rubber film cylinder (31), the cover plate (33) passes through the support plate (12) and is fixedly connected to the cover plate (11) via a set of mounting posts (14); the cover plate (11) is provided with a vertical loading device in the central area; the vertical loader is used to apply vertical pressure; the bottom of the vertical loader is provided with a vertical pressure sensor and a displacement sensor; a pile bottom is inserted into the rubber film cylinder (31) and a set of horizontal pressure sensors is embedded into the pile bottom; wobei am Außenring des Gummifilmzylinders (31) mindestens eine horizontale Ladeeinrichtung angeordnet ist, wobei die horizontale Ladeeinrichtung ein elastisches Band (51) aufweist ,und wobei das elastische Band (51) gekrümmt ist und den Außenkreis des Gummifilmzylinders (31) tangiert; ein Paar Zylinder (52) ist fest mit den beiden Enden des elastischen Bandes (51) verbunden, wobei der Zylinder (52) drehbar zwischen der Trageplatte (12) und der Bodenplatte (13) installiert ist, wobei zwei der Zylinder (52) angetrieben wird, um sich synchron durch eine Antriebsvorrichtung zu drehen; die Bodenplatte (13) ist mit zwei Gleitschlitzen (131) versehen, wobei jeder der Gleitschlitze (131) mit einem Schieber (53) verschiebbar verbunden ist; eine Schiebesäule (54) ist fest auf dem Schieber (53) installiert,wherein at least one horizontal loading device is arranged on the outer ring of the rubber film cylinder (31), the horizontal loading device having an elastic band (51), and the elastic band (51) being curved and tangent to the outer circle of the rubber film cylinder (31); a pair of cylinders (52) are fixedly connected to both ends of the elastic band (51), the cylinder (52) being rotatably installed between the support plate (12) and the bottom plate (13), two of the cylinders (52) being driven to rotate synchronously by a drive device; the bottom plate (13) is provided with two sliding slots (131), each of the sliding slots (131) being slidably connected to a slide (53); a sliding column (54) is permanently installed on the slide (53), SUNPT 19055LUSUNPT 19055LU 22.07.201907/22/2019 LU101323 wobei sich eine Schiebesäule (54) auf einer Seite des elastischen Bandes (51) in der Nähe des Gummifilmzylinders (31) befindet, und wobei die andere Schiebesäule (54) sich auf der dem Gummifilmzylinder (31) abgewandten Seite des Gummibandes (51) befindet.LU101323 with one sliding column (54) on one side of the elastic band (51) near the rubber film cylinder (31), and with the other sliding column (54) on the side of the rubber film cylinder (31) facing away from the rubber band (51) located. 2. Dynamische Testvorrichtung für mechanische Eigenschaften von Pfählen und Böden nach Anspruch 1, wobei die Antriebsvorrichtung ein erstes Zahnrad (41) aufweist, das fest an einem oberen Ende eines der Zylinder (52) angebracht ist, und wobei ein zweites Zahnrad (42) fest am oberen Ende des anderen Zylinders (52) montiert ist; ein Innenzahnkranz (43) ist drehbar an einer Oberseite der Trageplatte (12) angebracht, wobei das erste Zahnkranz (41) mit dem Innenzahnkranz (43) kämmt; ein Umkehrzahnrad (44) ist an einer Innenseite des Innenzahnkranzes (43) angeordnet, das Umkehrzahnrad (44) ist drehbar auf der Trageplatte (12) montiert, das Umkehrzahnrad (44) kämmt mit dem zweiten Zahnrad (42).2. The dynamic test device for mechanical properties of piles and floors according to claim 1, wherein the drive device has a first gear (41) which is fixedly attached to an upper end of one of the cylinders (52), and wherein a second gear (42) is fixed mounted at the top of the other cylinder (52); an inner ring gear (43) is rotatably attached to an upper surface of the support plate (12), the first ring gear (41) meshing with the inner ring gear (43); a reversing gear (44) is arranged on an inside of the inner ring gear (43), the reversing gear (44) is rotatably mounted on the support plate (12), the reversing gear (44) meshes with the second gear (42). 3. Dynamische Testvorrichtung für mechanische Eigenschaften von Pfählen und Böden nach Anspruch 2, wobei eine rotierende Welle des ersten Zahnrads (41) oder des zweiten Zahnrads (42) die Deckplatte (11) durchdringt und wobei ein erster Servomotor (45) am ende fest montiert ist; der erste Servomotor (45) ist fest auf der Deckplatte (11) montiert.3. Dynamic test device for mechanical properties of piles and floors according to claim 2, wherein a rotating shaft of the first gear (41) or the second gear (42) penetrates the cover plate (11) and wherein a first servo motor (45) is permanently mounted at the end is; the first servo motor (45) is fixedly mounted on the cover plate (11). 4. Dynamische Testvorrichtung für mechanische Eigenschaften von Pfählen und Böden nach Anspruch 1, wobei die Synchronisiereinrichtung einen zweiten Servomotor (71) aufweist; der zweite Servomotor (71) ist am Boden der Bodenplatte (13) fest montiert, eine rotierende Welle des zweiten Servomotors (71) durchdringt ein Ausweichloch der Bodenplatte (13) und ein Antriebszahnrad (72) ist am Ende fest montiert; auf der Oberseite der Bodenplatte (13) sind zwei Zahnstangen (73) parallel verschiebbar angeordnet, wobei das Antriebszahnrad (72) zwischen den beiden Zahnstangen (73) liegt, wobei die beiden Zahnstangen (73) mit dem Antriebszahnrad (72)beziehungsweise übereinstimmen; jedes der Zahnstangen (73) ist fest mit einer Verbindungsstange (74) verbunden, die Verbindungsstange (74) ist fest mit einer Gleitstange (75) verbunden, wobei die Gleitstange (75) verschiebbar auf der Bodenplatte (13) ist, wobei die4. Dynamic test device for mechanical properties of piles and floors according to claim 1, wherein the synchronizing device comprises a second servo motor (71); the second servo motor (71) is fixedly mounted on the bottom of the base plate (13), a rotating shaft of the second servo motor (71) penetrates an escape hole in the base plate (13) and a drive gear (72) is permanently mounted on the end; on the top of the base plate (13) two racks (73) are arranged in parallel, the drive gear (72) being located between the two racks (73), the two racks (73) respectively matching the drive gear (72); each of the racks (73) is fixedly connected to a connecting rod (74), the connecting rod (74) is fixedly connected to a slide rod (75), the slide rod (75) being slidable on the base plate (13), the SUNPT 19055LUSUNPT 19055LU 22.07.201907/22/2019 LU101323 Schiebesäule (54) fest auf einer Schiebestange (75) montiert sind.LU101323 sliding column (54) are firmly mounted on a push rod (75). 5. Dynamische Testvorrichtung für mechanische Eigenschaften von Pfählen und Böden nach Anspruch 4, wobei das elastische Band (51) in ein oberes Spannband (511) und ein unteres Spannband (512) unterteilt , wobei der Außenring des Zylinders (52) ) fest mit einer gekrümmten Erhebung (9) verbunden ist, die dem unteren Spannband (51) entspricht.5. Dynamic test device for mechanical properties of piles and floors according to claim 4, wherein the elastic band (51) is divided into an upper clamping band (511) and a lower clamping band (512), the outer ring of the cylinder (52)) being fixed to one curved elevation (9) is connected, which corresponds to the lower strap (51).
LU101323A 2019-07-22 2019-07-22 Dynamic testing device for mechanical properties of pile and soil LU101323B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111157366A (en) * 2020-01-20 2020-05-15 檀俊坤 Dynamic test equipment for mechanical properties of pile soil

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Publication number Priority date Publication date Assignee Title
US4885941A (en) * 1988-06-15 1989-12-12 Regents Of The University Of Minnesota Bi-axial geomaterial test system
CN106769478A (en) * 2017-01-23 2017-05-31 浙江大学 A kind of pile-soil interface shearing test device
CN107727517A (en) * 2017-11-20 2018-02-23 大连理工大学 A kind of energy stake stake Soil Interface shearing experiment device and experimental method
CN109682691A (en) * 2019-01-30 2019-04-26 河南理工大学 A kind of borehole wall and enclose soil contact face shearing test equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4885941A (en) * 1988-06-15 1989-12-12 Regents Of The University Of Minnesota Bi-axial geomaterial test system
CN106769478A (en) * 2017-01-23 2017-05-31 浙江大学 A kind of pile-soil interface shearing test device
CN107727517A (en) * 2017-11-20 2018-02-23 大连理工大学 A kind of energy stake stake Soil Interface shearing experiment device and experimental method
CN109682691A (en) * 2019-01-30 2019-04-26 河南理工大学 A kind of borehole wall and enclose soil contact face shearing test equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111157366A (en) * 2020-01-20 2020-05-15 檀俊坤 Dynamic test equipment for mechanical properties of pile soil

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