CN217605421U - Large-scale compression of primary gradation coarse-grained soil and infiltration test sample forming device - Google Patents

Abstract

A container containing loose filling samples is arranged at the bottom in a model cylinder, a hydraulic lifting column is pre-buried in the ground near the model cylinder and penetrates through a lower upright column to be fixedly connected with an upper upright column, an upright column steering device is arranged at the top of the upper upright column, a corner speed reduction motor is arranged on the upright column steering device, an output shaft of the corner speed reduction motor is connected with a rotating shaft, a cantilever rod is mounted on the rotating shaft, a moving trolley is arranged on the cantilever rod, a speed reduction motor is arranged at the lower part of the moving trolley, the output shaft of the speed reduction motor is connected with a vertical guide rod and a swing arm rod through a coupler, the end part of the vertical guide rod is connected with a bearing in a bearing support mounted on the horizontal guide rod, the end part of the swing arm rod is connected with the end part of the horizontal guide rod, 2 groups of rolling devices are arranged at the lower part of the horizontal guide rod, and the rolling devices are positioned in the model cylinder to compact the loose filling samples.

Description

Large-scale compression of coarse grain soil of primary grading and infiltration test sample forming device

Technical Field

The utility model belongs to the technical field of hydraulic and hydroelectric engineering dam filling coarse grained soil original grading large-scale compression test and perpendicular penetration test sample load and compaction, concretely relates to original grading coarse grained soil large-scale compression and penetration test sample forming device.

Background

The earth-rock dam of the building mainly plays a role in retaining water in hydraulic and hydroelectric engineering, and in the design of the earth-rock dam, the seepage analysis of the dam body is carried out by combining the actual requirements of the engineering, so that the leakage damage phenomenon of the earth-rock dam can be greatly reduced. In order to research the seepage rule and characteristics of water in a dam filling material soil body structure, a seepage deformation test of coarse-grained soil is required, parameters required by dam seepage stability analysis and calculation are provided for design, and a reasonable seepage-proofing arrangement type is selected. The dam filling material is commonly blast stone slag material, gravel material and the like, and the material has the characteristics of large particle size, wide particle size range, large density, large and irregular porosity and the like, and the permeability characteristic law of the material is different from that of a common homogeneous soil particle material. The traditional indoor compaction method for coarse-grained soil has three methods:

1. compaction method: the heavy hammer with certain mass is lifted to a certain height, and the surface of the hammering sample is freely dropped, so that the loose sample is hammered, and the structure is compact. The method is generally suitable for samples with the maximum particle size of less than 40mm, and has the advantages of limited compaction work and easy particle breakage.

2. Surface vibration method: the surface of a loose sample is provided with a heavy hammer with certain mass, and the surface of the sample is subjected to impact vibration compaction with certain frequency and amplitude under the driving of a motor, so that the structure of the sample is compact. The method is generally suitable for samples with the maximum particle size of 60mm, the samples are similar-grade ingredients with small particle sizes processed by a specified scaling method, and large errors are caused on results of subsequent compression tests, penetration tests and the like.

3. Vibration ramming: for a sample similar to original grading or full grading, the maximum grain size of the sample is 400mm (at present), the sample is manually filled in a layering mode, an electric tamping plate is used for tamping, and the structure of the sample is compact under the action of exciting force. The method is simple and convenient to operate, the compaction efficiency is general, particles with the middle grain diameter (10-80 mm) are easy to break, the grading gap state of the sample is changed, and the initial state of the prepared sample has larger deviation with the design or actual construction.

The method cannot well simulate the field compaction process, cannot ensure good compaction effect, and is not easy to obtain the initial state of the sample before the test.

Disclosure of Invention

The utility model aims to solve the technical problem that overcome above-mentioned prior art not enough, provide a reasonable in design, easy operation, the compaction is effectual, use manpower sparingly the large-scale compression of coarse grained soil of former grade and penetration test sample forming device.

The technical scheme for solving the technical problems is as follows: a large-scale compression and permeation test sample forming device for primary-grade coarse-grained soil is characterized in that a model cylinder is placed on the ground, a container containing a loose filling sample is arranged at the bottom in the model cylinder, a hydraulic lifting column is pre-buried in the ground near the model cylinder and penetrates through a lower upright column arranged on the ground to be fixedly connected with an upper upright column, an upright column steering device is arranged at the top of the upper upright column, a corner speed reducing motor is arranged on the upright column steering device, an output shaft of the corner speed reducing motor is connected with a rotating shaft arranged on the upright column steering device through a coupler, a cantilever rod is vertically and fixedly connected to the rotating shaft, a moving trolley is arranged on the cantilever rod, a speed reducing motor is arranged at the lower part of the moving trolley, an output shaft of the speed reducing motor is connected with a vertical guide rod and a swing arm rod through a coupler, the end part of the vertical guide rod is connected with a bearing arranged in a bearing support arranged on a horizontal guide rod, the end part of the swing arm rod is connected with the end part of the horizontal guide rod, 2 groups of rolling devices are arranged at the lower part of the horizontal guide rod and the rolling devices are positioned in the model cylinder to compact the loose filling sample.

The utility model discloses a 2 group rolling machine is on horizontal guide bar about vertical guide bar both sides mutual disposition.

The utility model discloses a rolling machine does: the grinding wheel support is installed on the horizontal guide rod through the movable sliding block, a grinding wheel is arranged on the lower portion of the grinding wheel support, and an output shaft of the stepping speed reduction motor is connected with the grinding wheel.

The utility model discloses a running roller does: the inside equipartition of steel cylinder is provided with 3 groups of arc lugs, and the steel cylinder sets up on the mill wheel axle and can rotate relatively, and the mill wheel is epaxial to be provided with a plurality of groups at interval and to the unanimous eccentric block, and the free end of eccentric block stretches into the depressed part of arc lug.

The utility model discloses a travelling car does: the trolley body is provided with a trolley driving motor, an output shaft of the trolley driving motor drives the moving wheels to rotate through a gear transmission structure, and 2 groups of moving wheels are placed in the guide rail arranged on the side surface of the cantilever rod, so that the trolley body moves along the length direction of the cantilever rod.

The utility model discloses a model bobbin base portion is provided with the gyro wheel, and the gyro wheel sets up in installing subaerial track.

The utility model discloses a be provided with safe rope between cantilever bar's free end and the axis of rotation.

Because the utility model discloses a with vertical guide bar, horizontal guide bar and grinding roller assembly install on cantilever bar travelling car, with vertical guide bar during the use, horizontal guide bar, pendulum rod and grinding roller assembly handling are to the mould section of thick bamboo in, adjust two grinding roller horizontal positions, make two grinding roller fissure of displacement overlap joints roll or roll with the orbit, it begins to roll to open step reduction motor drive grinding roller, the swing arm pole begins synchronous rotation, the eccentric block produces centrifugal force when rotating together with the lug, produce the impact force to the sample surface, two grinding roller front and back fissure of displacement overlap joints roll (or roll with the orbit in order the fissure of displacement overlap joint roll), adjacent overlapping part has certain effect of rubbing when the fissure of displacement overlap joint roll, more be favorable to the sample granule to tend towards stable in close contact with loosely, the sample is under the dead weight of grinding roller, lug instantaneous impact force and rubbing effect, obtain anticipated closely knit degree and porosity through repeated the roll. Compared with the traditional method, the device saves a large amount of labor work compared with manual carrying and filling, can better simulate the field compaction process, ensures the compaction effect, adopts an electric tamping plate compared with the traditional method, is easier to obtain the good compaction effect, and can be popularized and applied to the fields of large-scale compression test and vertical penetration test sample filling and compaction of the coarse-grained soil original grading of dam filling materials of hydraulic and hydroelectric engineering.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of the structure of the traveling carriage 9 in fig. 1.

Fig. 3 is a schematic view of the structure of the grinding wheel 17 in fig. 1.

In the figure: 1. a hydraulic lifting column; 2. a lower column; 3. an upper column; 4. a column steering device; 5. a corner speed reduction motor; 6. a rotating shaft; 7. a cantilever bar; 8. a safety rope; 9. moving the trolley; 10. a reduction motor; 11. a vertical guide bar; 12. a bearing support; 13. a horizontal guide bar; 14. a swing arm lever; 15. moving the slide block; 16. a roller support; 17. grinding the wheel; 18. a roller; 19. a track; 20. a step-by-step speed reduction motor; 21. a mold cylinder; 9-1, a trolley driving motor; 9-2, a trolley body; 9-3, moving wheels; 17-1, a steel cylinder; 17-2, arc-shaped bumps; 17-3, a grinding wheel shaft; 17-4, an eccentric block.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and examples, but the present invention is not limited to these examples.

Example 1

In fig. 1 to 3, the utility model relates to a large-scale compression of coarse-grained soil of primary grade and penetration test sample forming device, a model section of thick bamboo 21 is placed subaerial, contains the container of loose loading sample and places in a model section of thick bamboo 21 bottom, and for convenient the removal, gyro wheel 18 is installed to a model section of thick bamboo 21 bottom, and gyro wheel 18 sets up in installing in subaerial track 19. Near the model section of thick bamboo 21 underground pre-buried have hydraulic pressure lift post 1, hydraulic pressure lift post 1 passes and is fixed in subaerial lower part stand 2 and upper portion stand 3 fixed connection, upper portion stand 3 can reciprocate along with hydraulic pressure lift post 1, the stand turns to device 4 is installed at the top of upper portion stand 3, stand turns to device 4 and can rotates on upper portion stand 3, install corner gear motor 5 through screw fastening connecting piece fixed connection on the stand turns to device 4, the output shaft of corner gear motor 5 is connected with the axis of rotation 6 of installing on stand turns to device 4 through the shaft coupling, perpendicular fixed connection installs cantilever bar 7 on the axis of rotation 6, be provided with safety rope 8 between cantilever bar 7's free end and the axis of rotation 6, safety rope 8 guarantees the stability of cantilever bar 7. The corner speed reducing motor 5 drives the rotating shaft 6 to rotate, the range of the corner is minus 90 degrees to plus 90 degrees, and the rotating shaft is used for controlling the cantilever rod 7 to rotate in time within the range of a working face.

The cantilever rod 7 is provided with a moving trolley 9, the moving trolley 9 of the embodiment is formed by connecting a trolley driving motor 9-1, a trolley body 9-2 and a moving wheel 9-3, the trolley body 9-2 is fixedly connected and provided with the trolley driving motor 9-1 through a threaded fastening connecting piece, an output shaft of the trolley driving motor 9-1 drives the moving wheel 9-3 to rotate through a gear transmission structure, and 2 groups of moving wheels 9-3 are placed in guide rails arranged on two side surfaces of the cantilever rod 7, so that the trolley body 9-2 moves along the length direction of the cantilever rod 7.

The lower part of the movable trolley 9 is provided with a speed reducing motor 10, an output shaft of the speed reducing motor 10 is connected with a vertical guide rod 11 and a swing arm rod 14 through a coupler, the end part of the vertical guide rod 11 is connected with a bearing in a bearing support 12 arranged on a horizontal guide rod 13, the end part of the swing arm rod 14 is connected with the end part of the horizontal guide rod 13, 2 groups of rolling devices are arranged on the lower part of the horizontal guide rod 13 and can move along the horizontal guide rod 13, the parts form a steering guide mechanism of the rolling devices to realize the circular motion steering of the rolling devices, the horizontal guide rod 13 and the rolling devices are positioned in a model cylinder 21, and loose filling samples in the horizontal guide rod are compacted when the steering guide mechanism rotates circumferentially. The rolling device of the embodiment is formed by connecting a moving slide block 15, a rolling wheel bracket 16, a rolling wheel 17 and a stepping speed reduction motor 20, wherein the rolling wheel bracket 16 is installed on a horizontal guide rod 13 through the moving slide block 15, the moving slide block 15 can move along the horizontal guide rod 13, the rolling wheel 17 is installed at the lower part of the rolling wheel bracket 16, an output shaft of the stepping speed reduction motor 20 is connected with the rolling wheel 17, and the stepping speed reduction motor 20 is used as a power source for rotating the rolling wheel 17. Further, the grinding wheel 17 is formed by connecting a steel cylinder 17-1, arc-shaped lugs 17-2, a grinding wheel shaft 17-3 and eccentric blocks 17-4, 3 groups of arc-shaped lugs 17-2 are uniformly distributed in the steel cylinder 17-1, the steel cylinder 17-1 is arranged on the grinding wheel shaft 17-3 and can rotate relatively, a plurality of groups of eccentric blocks 17-4 with the same direction are arranged on the grinding wheel shaft 17-3 at intervals, and the free ends of the eccentric blocks 17-4 extend into the concave parts of the arc-shaped lugs 17-2. The rolling wheel is driven by a stepping speed reducing motor 20 to drive a rolling wheel shaft 17-3 and an eccentric block 17-4 to rotate, the arc-shaped convex block 17-2 is clamped in the rotating process of the eccentric block 17-4, so that the arc-shaped convex block 17-2 is driven to rotate, a steel cylinder 17-1 rotates along with the arc-shaped convex block 17-2, when the rolling wheel 17 rolls on the surface of a loose filling sample, the rolling wheel has the functions of compaction and compaction under the alternate action of self gravity and the falling instant exciting force of the arc-shaped convex block 17-2, the total weight of the rolling wheel 17 is about 100kg, and the generated exciting force is about 110 nm. The output rotating speed of the reducing motor 10 is matched with the walking speed of the rolling wheel 17 in a coordinated manner, the torque provided by the cantilever rod 7 end of the reducing motor ensures additional traction and steering of the rolling wheel 17, the torque cannot overcome the gravity of the rolling wheel 17 and the ground friction resistance to do work (steering or traction) alone and has an auxiliary steering effect, and the torque resultant force provided by the stepping reducing motor 20 of the rolling wheel 17 completes the horizontal traction movement and steering of the rolling wheel;

when the device is used, the stepping speed reducing motor 20 drives the rolling wheel 17 to perform circumferential rolling compaction operation, in order to ensure that the rolling wheel performs rolling in order in sequence, an additional traction steering mechanism is arranged, 2 groups of rolling devices can be symmetrically arranged on the horizontal guide rod 13 relative to the vertical guide rod 11, circular straight line reciprocating compaction operation is kept, the position of the sliding block 15 on the horizontal guide rod 13 can be adjusted, so that the distance between the 2 groups of rolling devices and the center position of the vertical guide rod 11 on the horizontal guide rod 13 is different by half the length of the rolling wheel, the rolling wheel 17 is ensured to perform rolling in sequence and adjacent rolling tracks have half-wheel-width overlapped parts, and through repeated compaction for multiple times, the compact structure of a sample is achieved, and the distance between the 2 groups of rolling devices and the horizontal guide rod 13 is adjusted according to actual needs.

The utility model discloses an operating procedure as follows:

1. mold cylinder 21 in place: and pushing the model cylinder 21 out of the test reaction frame, and installing anti-slip blocks at four casters at the bottom to prevent the model cylinder from sliding along the rail 19 in the process of forming the sample.

2. Preparing a sample: and (3) synthesizing each level of air-dried sample into proportion according to a test characteristic grading curve, distributing water according to the optimal water-containing state, and turning and stirring uniformly on a clean flat plate for later use.

3. The height of the upright post and the angle position of the cantilever rod 7 are adjusted, so that the loading and the hoisting are convenient. The prepared mixture is contained in a fixed container, the hydraulic lifting column 1 is lifted, the upright column steering device 4 is rotated, the material containing fixed container is lifted to the upper part of the model cylinder 21 by utilizing the trolley 9 which is moved on the cantilever rod 7, and slowly descends to the bottom of the model cylinder 21, and the mixture is discharged and uniformly spread. Repeating the above steps until the boundary of the pre-laminated thickness is filled and the surface is leveled.

4. The combination body of the vertical guide rod 11, the horizontal guide rod 13, the grinding wheel 17 and the like is arranged at the bottom of the movable trolley 9 and lifted into a sample model cylinder 21, the initial position of the grinding wheel 17 is adjusted, the two groups of grinding wheels 17 are enabled to be in staggered joint overlapping (or in sequence grinding with the same track), the overlapping part is half of the width of the grinding wheel, and the grinding wheel 17 is arranged on the surface of a sample.

5. Starting the stepping speed reducing motor 20 and the speed reducing motor 10, and preferably keeping the speed of the grinding wheel 17 at 14-18 m/min. The rolling position is adjusted by moving the slide block 15 on the horizontal guide rod 13. The surface of the sample is integrally rolled twice, and then the rolling is repeated from outside to inside in sequence until the test passes are carried out, or no obvious trace is left on the surface.

6. After finishing the grinding, the grinding combination is hung out of the mold cylinder 21. And repeating the operation steps 3, 4, 5 and 6. Until the end of the sample filling.

Before the device is used, whether the functions of all parts are normal or not needs to be checked, the parts are maintained regularly, dust is cleaned, and wear-resistant lubricating grease is smeared at the positions of a rotating bearing, a movable sliding block, a hinged joint and the like to prevent the surface from rusting.

Claims (7)

1. The utility model provides a large-scale compression of coarse grain soil of primary grading and penetration test sample forming device which characterized in that: the device comprises a model cylinder (21), a container containing a loose filling sample is arranged at the bottom in the model cylinder (21), a hydraulic lifting column (1) is embedded underground near the model cylinder (21), the hydraulic lifting column (1) penetrates through a lower upright (2) arranged on the ground to be fixedly connected with an upper upright (3), an upright steering device (4) is arranged at the top of the upper upright (3), a corner speed reducing motor (5) is arranged on the upright steering device (4), an output shaft of the corner speed reducing motor (5) is connected with a rotating shaft (6) arranged on the upright steering device (4) through a coupler, a cantilever rod (7) is vertically and fixedly connected on the rotating shaft (6), a moving trolley (9) is arranged on the cantilever rod (7), a speed reducing motor (10) is arranged at the lower part of the moving trolley (9), an output shaft of the speed reducing motor (10) is connected with a vertical guide rod (11) and a swing arm rod (14) through the coupler, the end part of the vertical guide rod (11) is connected with a bearing support seat arranged on a horizontal guide rod (12) arranged on the horizontal guide rod (13), and a compaction device for compacting the sample and grinding and compacting device for compacting the horizontal guide rod (13).

2. The primary-grade coarse-grained soil large-scale compression and permeation test sample forming device according to claim 1, characterized in that: the 2 groups of rolling devices are oppositely arranged on the horizontal guide rod (13) relative to the two sides of the vertical guide rod (11).

3. The apparatus for forming large-scale compression and infiltration test sample of graded coarse-grained soil according to claim 1, wherein the rolling device comprises: the grinding wheel bracket (16) is arranged on the horizontal guide rod (13) through a movable sliding block (15), a grinding wheel (17) is arranged at the lower part of the grinding wheel bracket (16), and an output shaft of the stepping speed reduction motor (20) is connected with the grinding wheel (17).

4. The large-scale compression and infiltration test sample forming device of primary grade coarse-grained soil according to claim 3, characterized in that the grinding wheel (17) is: 3 groups of arc-shaped convex blocks (17-2) are uniformly distributed in the steel cylinder (17-1), the steel cylinder (17-1) is arranged on the roller shaft (17-3) and can rotate relatively, a plurality of groups of eccentric blocks (17-4) with the same direction are arranged on the roller shaft (17-3) at intervals, and the free ends of the eccentric blocks (17-4) extend into the concave parts of the arc-shaped convex blocks (17-2).

5. The large-scale compression and penetration test sample forming device for primary graded coarse-grained soil according to claim 1, characterized in that the moving trolley (9) is: a trolley driving motor (9-1) is arranged on the trolley body (9-2), an output shaft of the trolley driving motor (9-1) drives the moving wheels (9-3) to rotate through a gear transmission structure, and 2 groups of moving wheels (9-3) are placed in a guide rail arranged on the side face of the cantilever rod (7), so that the trolley body (9-2) moves along the length direction of the cantilever rod (7).

6. The device for forming a large-scale compression and permeation test sample of primary graded coarse-grained soil according to claim 1, wherein: the bottom of the model cylinder (21) is provided with a roller (18), and the roller (18) is arranged in a track (19) arranged on the ground.

7. The device for forming a large-scale compression and permeation test sample of primary graded coarse-grained soil according to claim 1, wherein: a safety rope (8) is arranged between the free end of the cantilever rod (7) and the rotating shaft (6).

Images