CN108444783B - Model test soil filling device and method for slide type large underground test platform - Google Patents
Model test soil filling device and method for slide type large underground test platform Download PDFInfo
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Abstract
The invention discloses a model test soil filling device and method for a slide type large-scale underground test platform, and belongs to the field of model test soil filling. The device comprises a platform scale, a small cart, a rest platform, a slide device, a vertical steel plate, a hinge, a bolt, a vertical baffle, a model box, a vertical supporting rod, a steel plate groove and an impact-proof sleeve. The slide device comprises a funnel-shaped slide, a front slide, a middle slide, a tail slide and a replaceable curvature outlet. The main body part of the funnel-shaped slide is connected with the vertical steel plate through a movable hinge, and the vertical steel plate can rotate freely. The vertical baffle is supported on the wall of one side of the model box and plays a role in preventing the slide device from sliding downwards. The invention can be assembled quickly, and is easy to disassemble, fast in filling speed and time-saving and labor-saving after the test soil filling is finished. According to the actual spatial position relation between the test platform and the top of the model box, linear slides or curved slides can be erected in sections, and the test platform has great flexibility.
Description
Technical Field
The invention belongs to the field of model test filling, and particularly relates to a model test filling device and method for a slide type large-scale underground test platform.
Background
In recent years, as ground structure research becomes more and more perfect, more and more scientific research institutes gradually shift the center of gravity of research into the field of geotechnical engineering. The research method of the geotechnical engineering problem comprises theoretical research, model test, numerical simulation and the like.
The model test is widely applied to the field of geotechnical engineering such as tunnels, foundation pits and the like, and is more intuitive, can qualitatively or quantitatively reflect the stress characteristics of natural rock masses related to underground engineering, is related to the mutual influence of underground engineering structures, and can be mutually verified with a mathematical model; the physical simulation can comprehensively and truly simulate complex underground engineering structures, complex stratum conditions and the like. In addition, model tests can explore many problems which are not easy to solve by using mathematical and mechanical methods at present, and provide a basis for establishing a new theoretical and mathematical model. With the increasing scale of underground engineering, the problems are more and more complex, and the content of research is more and more, so the requirements on the scientific research design level of the underground engineering are higher and higher. The simulation of model tests for underground engineering development under complex geological conditions is the direction of current geotechnical engineering problem research and has practical engineering significance.
The disadvantage of the model test is that the size of the model device is much smaller than the size of the engineered structure and the formation. Therefore, the model test cannot satisfy all the similarity ratios, and there is a size effect. One of the current solutions is to perform a centrifuge test; another is to increase the size of the mould arrangement. The larger the size of the model test is, the closer the result is to the actual engineering, and the smaller the size effect is. In order to reduce the size effect as much as possible and to simulate the formation conditions and structures in practical engineering as accurately as possible, many scientific research institutes adopt a method of increasing the size of a model box.
However, the model test is required to face a fundamental problem of filling the model box with earth. For example, the underground comprehensive test platform of Beijing university of industry can carry out model test of 6m multiplied by 10m at most. How to fill such a large mold box with soil quickly and safely is a problem.
In view of the large scale of the large underground test platform, a device and a method for filling soil on the large underground test platform are urgently needed.
Disclosure of Invention
The invention aims to provide a test device which is convenient to operate and high in soil filling efficiency and is used for filling soil of a large underground test platform.
The invention aims to solve the technical problem of providing a device and a method for filling soil for a large underground test platform, which can be conveniently provided for the underground test platform.
The technical solution of the invention is as follows:
the utility model provides a large-scale underground test platform's of slide model test device that bankets, the device includes platform scale (1), small handcart (2), rest platform (3), slide device, vertical steel sheet (12), hinge (13), bolt (14), vertical baffle (15), mold box (16), vertical bracing piece (17), steel sheet groove (18) and protecting against shock sleeve (19).
The platform scale (1) is used for weighing the quality of the test filling soil which is put into the small cart (2) each time.
The small handcart (2) is a walking flat car, the handle of the small handcart (2) is provided with a vertical support, the vertical support is placed on the ground to keep the small handcart (2) balanced, soil for test is pushed onto a rest platform (3) of the test platform during test, and then the soil for test is transported repeatedly.
The rest platform (3) is a hollow steel plate box without a steel plate on the front surface, a bottom plate of the hollow steel plate box and the ground are anchored to form a whole and used for parking the trolley (2) and fixing the slide device, and the slide device is obliquely arranged.
The slide device consists of a funnel-shaped slide (4), a head slide (5), a middle slide (6), a tail slide (7) and a replaceable curvature outlet (8). The funnel-shaped slide (4), the head slide (5), the middle slide (6), the tail slide (7) and the replaceable curvature outlet (8) are sequentially connected; the end parts of the funnel-shaped slide (4), the head part slide (5), the middle part slide (6), the tail part slide (7) and the replaceable curvature outlet (8) are all provided with outward extending rib plates (9) which are connected with each other through the rib plates (9).
The inside of prelude slide (5), middle part slide (6) and afterbody slide (7) comprises backup pad (10) and circular steel ring (11), and circular steel ring (11) are used for the transportation of the soil body, and the outside of circular steel ring (11) is equipped with backup pad (10), and backup pad (10) are used for preventing circular steel ring (11) to remove the deformation. The slide device corresponds to the position of the mold box (16).
The main part of the funnel-shaped slide (4) is connected with the vertical steel plate (12) through a movable hinge (13), and the vertical steel plate (12) can rotate freely. The vertical steel plate (12) is connected with a vertical panel of the rest platform (3) through a bolt (14), so that the funnel-shaped slide (4) and the rest platform (3) form a fixed whole.
A vertical baffle (15) is arranged below the tail slide (7), the vertical baffle (15) is supported on the wall of one side of the model box (16), and the vertical baffle (15) plays a role in preventing the slide device from sliding downwards.
The replaceable curvature outlet (8) plays a role in converting the movement direction of the test soil in the slide. According to the position of the box bottom where the test soil is required to slide down, the replaceable curvature outlets (8) with different lengths and curvatures are selected, and the replaceable curvature outlets (8) are connected with the tail slide (7).
The bottom of slide device is equipped with vertical support rod (17), and vertical support rod (17) upper end is connected with a steel sheet groove (18), and vertical support rod (17) play the effect of supporting the slide device, and the angle of inclination of slide device is the same with the angle of inclination in steel sheet groove (18).
Protecting against shock sleeve (19) are made by tough flexible material, and protecting against shock sleeve (19) ligature has reduced the impact velocity at the lower extreme of removable curved surface export (8), vertical downwards under the action of gravity, and the experiment in the slide device is with soil behind protecting against shock sleeve (19).
Smooth coiled materials are attached to the inner surface of a circular steel ring (11) in the slide device and used for reducing friction between test filling and the circular steel ring (11).
The soil filling method of the soil filling device for the model test by using the slide type large-scale underground test platform comprises the following steps:
s1, calculating the quality of the filling soil at each layer with the predicted height according to the control density of the filling soil in the test model box (16).
S2, in the test soil piling area, weighing a certain amount of test soil by a platform scale (1) in a grading way, then loading the test soil into the small cart (2), and recording the mass of the test soil in the small cart (2).
S3, pushing the small cart to a rest platform (3) of the test platform, pouring the soil for the test into the funnel-shaped opening of the slideway by using a spade or a manual lifting vehicle, and sliding the soil for the test into the model box (16) through the slideway.
S4, the small cart (2) is pushed back to the test soil piling area, and the weighed test soil is loaded into the small cart (2) again until the quality of the test soil on the layer reaches the calculated value.
S5 workers enter the model box through the staircase, the test soil is scraped flat by a flat sand rake, and then the soil is tamped manually or mechanically according to the test scheme.
S6, the test soil is tamped layer by layer, and the test soil is tamped for a certain number of times at the same position, and is tamped for half, and the tamped parts are connected and are connected in a row. And (5) tamping for the first time, leveling again, and then tamping for the next time.
S7 repeating steps S1-S6 to complete filling and tamping of the soil for the next layer of test.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention uses a test device and a scheme which are simple to manufacture and low in cost, can be quickly assembled and is applied to the large-scale underground test platform model test soil filling device. Meanwhile, after the test soil filling is finished, the disassembly is simple.
(2) The invention utilizes the gravitational potential energy of the filled soil, does not need heavy workload such as lifting and placing the test soil and the like in the prior art, has high filling speed and saves time and labor.
(3) The invention provides an idea for filling soil for a large underground test platform, can erect linear slides or curve slides in sections according to the actual spatial position relationship between the test platform and the top of the model box, and has great flexibility.
Drawings
Fig. 1 is a schematic diagram of a model test soil filling device of a slide type large-scale underground test platform.
Fig. 2 is a partial schematic view of a funnel-shaped slide and a head slide of a model test soil filling device of a slide type large-scale underground test platform.
Fig. 3 is a partial schematic view of slides at the head, middle and tail parts of the model test soil filling device of the slide type large-scale underground test platform.
Fig. 4 is a partial schematic view of a replaceable curvature outlet and an impact-proof sleeve of a model test earth filling device of a slide type large-scale underground test platform.
Fig. 5 a top view of the slide arrangement.
FIG. 6 is a cross-sectional view of the leading slide, middle slide, and trailing slide portions of the slide assembly.
In the figure: 1. the novel platform comprises a platform scale, 2. a trolley, 3. a rest platform, 4. a funnel-shaped slide, 5. a head slide, 6. a middle slide, 7. a tail slide, 8. a replaceable curvature outlet, 9. a rib plate, 10. a supporting plate, 11. a circular steel ring, 12. a vertical steel plate, 13. a hinge, 14. a bolt, 15. a vertical baffle, 16. a model box, 17. a vertical supporting rod, 18. a steel plate groove and 19. an impact-proof sleeve.
Detailed Description
The present invention is further described with reference to the drawings and the embodiments, but the scope of the present invention should not be limited thereto.
Referring to fig. 1 to 6, the model test soil filling device of the slide type large-scale underground test platform comprises: platform scale (1), small handcart (2), rest platform (3) and slide device, removable camber export (8), vertical support rod (17), protecting against shock sleeve (19).
And the platform scale (1) is used for weighing the soil filling quality of the test in the small cart each time. And the small trolley (2) pushes the test soil onto a rest platform of the test platform during the test, and then repeatedly transports the test soil. The rest platform (3) is a hollow steel plate box without a steel plate on the front surface, and the bottom plate is anchored with the ground to form a whole and used for parking the trolley (2) and fixing the whole slide device on the lower part.
The slide device is a core part of the invention and consists of a funnel-shaped slide (4), a head slide (5), a middle slide (6), a tail slide (7) and a replaceable curvature outlet (8). The head and the tail of each component are provided with a ribbed plate (9) which extends outwards, and the components are connected with each other through bolts among the ribbed plates (9). The head slide (5), the middle slide (6) and the tail slide (7) are all composed of a support plate (10) and a circular steel ring (11) inside, the circular steel ring (11) is used for transporting soil, and the support plate (10) is used for preventing the circular steel ring (11) from moving and deforming. The main part of the funnel-shaped slide (4) is connected with the vertical steel plate (12) through a movable hinge (13), and the vertical steel plate (12) can rotate freely. The vertical steel plate (12) is connected with a vertical panel of the rest platform (3) through a bolt (14), so that the funnel-shaped slide (4) and the rest platform (3) form a fixed whole. The lower part of the tail slide (7) is provided with a vertical baffle (15) which is supported on the wall of one side of the model box (16) and plays a role in preventing the slide device from sliding downwards. The replaceable curvature outlet (8) plays a role in converting the movement direction of the test soil in the slide. According to the position of the box bottom where the test soil is required to slide down, the replaceable curvature outlets (8) with different lengths and curvatures can be selected and connected with the tail slide (7).
The upper end of the vertical supporting rod (17) is connected with a steel plate groove (18) to play a role of supporting the slideway, and the inclination angle of the slideway is the same as that of the steel plate groove (18). Protecting against shock sleeve (19), tough flexible material ligature in the lower extreme of removable curved surface export (8), vertically downwards under the action of gravity, in the slide test with soil behind protecting against shock sleeve (19), speed reduction.
The inner surface of the circular steel ring (11) in the slide device is pasted with a smooth coiled material for reducing friction between test filling and the steel ring.
The following procedure for the sand test example was as follows:
s1, calculating the quality of the filling soil at each layer with the predicted height according to the control density of the filling soil in the model box (16). The method comprises the steps of weighing the mass of sandy soil by a platform scale (1) in multiple times beside a sandy soil mound area, then loading the sandy soil into a small trolley (2), and calculating and recording the total mass of the soil for the test of the small trolley at this time.
S2, pushing the small cart to a rest platform (3) of the test platform, pouring the soil for the test into the funnel-shaped opening of the slideway by using a spade or a manual lifting vehicle, and sliding the soil for the test into the model box (16) through the slideway.
S3, the small cart (2) is pushed back to the test soil piling area, and the weighed test soil is loaded into the small cart (2) again until the quality of the test soil on the layer reaches the calculated value.
S4 workers enter the model box through the staircase, the test soil is scraped flat by a flat sand rake, and then the soil is tamped manually or mechanically according to the test scheme. The test soil is tamped layer by layer, the same position is tamped for a certain number of times, and the tamping is pressed for half tamping, the tamping is connected, and the tamping is connected in a row. And (5) tamping for the first time, leveling again, and then tamping for the next time.
S5, repeating the steps (1) to (4) to finish the filling and tamping of the next layer of sandy soil.
The components and embodiments of the present invention have been described above, but the present invention is not limited thereto, and can be modified as appropriate within a range not exceeding the gist of the present invention.
Claims (3)
1. The utility model provides a large-scale underground test platform's of slide formula model test device of filling soil which characterized in that: the device comprises a platform scale (1), a trolley (2), a rest platform (3), a slide device, a vertical steel plate (12), a hinge (13), a bolt (14), a vertical baffle (15), a model box (16), a vertical supporting rod (17), a steel plate groove (18) and an impact-proof sleeve (19):
the platform scale (1) is used for weighing the quality of the test filling soil which is put into the small cart (2) each time;
the small handcart (2) is a walking flat car, a vertical support is arranged at the handle of the small handcart (2), the vertical support is placed on the ground to keep the small handcart (2) balanced, soil for test is pushed onto a rest platform (3) of the test platform during test, and then the soil for test is transported repeatedly;
the rest platform (3) is a hollow steel plate box without a steel plate on the front surface, a bottom plate of the hollow steel plate box is anchored with the ground to form a whole and used for parking the trolley (2) and fixing the slide device, and the slide device is obliquely arranged;
the slide device consists of a funnel-shaped slide (4), a front slide (5), a middle slide (6), a tail slide (7) and a replaceable curvature outlet (8); the funnel-shaped slide (4), the head slide (5), the middle slide (6), the tail slide (7) and the replaceable curvature outlet (8) are sequentially connected; the end parts of the funnel-shaped slide (4), the head slide (5), the middle slide (6), the tail slide (7) and the replaceable curvature outlet (8) are all provided with outward extending rib plates (9) which are connected with each other through the rib plates (9);
the interior of each of the head slide (5), the middle slide (6) and the tail slide (7) is composed of a support plate (10) and a circular steel ring (11), the circular steel ring (11) is used for transporting soil, the support plate (10) is arranged on the outer side of the circular steel ring (11), and the support plate (10) is used for preventing the circular steel ring (11) from moving and deforming; the slide device corresponds to the position of the model box (16);
the main part of the funnel-shaped slide (4) is connected with a vertical steel plate (12) through a movable hinge (13), and the vertical steel plate (12) can rotate freely; the vertical steel plate (12) is connected with a vertical panel of the rest platform (3) through a bolt (14), so that the funnel-shaped slide (4) and the rest platform (3) form a fixed whole;
a vertical baffle (15) is arranged below the tail slide (7), the vertical baffle (15) is supported on the wall of one side of the model box (16), and the vertical baffle (15) plays a role in preventing the slide device from sliding downwards;
the replaceable curvature outlet (8) plays a role in converting the movement direction of the test soil in the slide; according to the position of the box bottom where the test soil is required to slide down, the replaceable curvature outlets (8) with different lengths and curvatures are selected, and the replaceable curvature outlets (8) are connected with the tail slide (7);
the bottom of the slide device is provided with a vertical support rod (17), the upper end of the vertical support rod (17) is connected with a steel plate groove (18), the vertical support rod (17) plays a role in supporting the slide device, and the inclination angle of the slide device is the same as that of the steel plate groove (18);
protecting against shock sleeve (19) are made by tough flexible material, and protecting against shock sleeve (19) ligature has reduced the impact velocity at the lower extreme of removable curved surface export (8), vertical downwards under the action of gravity, and the experiment in the slide device is with soil behind protecting against shock sleeve (19).
2. The model test soil filling device of the slide type large-scale underground test platform according to claim 1, characterized in that: smooth coiled materials are attached to the inner surface of a circular steel ring (11) in the slide device and used for reducing friction between test filling and the circular steel ring (11).
3. A soil filling method of a model test soil filling apparatus using the soil filling apparatus according to claim 1, characterized in that: the method comprises the following steps of,
s1, calculating the quality of the earth filling at the predicted height of each layer according to the control density of the earth filling in the test model box (16);
s2, weighing a certain amount of soil for the test in a soil piling area for the test by a platform scale (1) in a grading manner, then loading the soil for the test into the small trolley (2), and recording the total mass of the soil for the test of the small trolley (2);
s3, pushing the small cart to a rest platform (3) of the test platform, pouring test soil into a funnel-shaped opening of a slideway by using a spade or a manual lifting vehicle, and sliding the test soil into a model box (16) through the slideway;
s4, pushing the small cart (2) back to the test soil stacking area, and filling the weighed test soil into the small cart (2) again until the quality of the test soil on the layer reaches a calculated value;
s5, a worker enters the model box through the escalator, the soil for the test is scraped flat by a flat sand rake, and then manual tamping or mechanical tamping is selected according to the test scheme;
s6, ramming the soil for the test layer by layer, ramming the soil for a certain number of times at the same position, and performing ramming, namely half ramming, ramming connection and row connection; tamping for the first time, leveling again, and then tamping for the next time;
s7 repeating steps S1-S6 to complete filling and tamping of the soil for the next layer of test.
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| CN201473846U (en) * | 2009-08-18 | 2010-05-19 | 冯守中 | Anti-scouring structure for silt fill subgrade side slope |
| CN202273214U (en) * | 2011-09-29 | 2012-06-13 | 广东省长大公路工程有限公司 | Temporary draining device of subgrade filling side slope |
| CN102519811B (en) * | 2011-12-16 | 2014-05-07 | 山东大学 | Model and method for testing deformation and stress variation law of intensity attenuation roadbed |
| CN103308663B (en) * | 2013-05-13 | 2016-02-24 | 西南交通大学 | Geotechnical Engineering slope model test case |
| CN103353516B (en) * | 2013-05-27 | 2015-07-15 | 中国地质大学（武汉） | Large movable lateral uplifting composite lading slope physical model test apparatus |
| CN103954740B (en) * | 2014-04-11 | 2016-01-20 | 中国科学院武汉岩土力学研究所 | A kind of expansive soil slope hygroscopic deformation model test method and system |
| CN105136577B (en) * | 2015-09-22 | 2017-07-21 | 河南科技大学 | A kind of assembled multifunction test device |
| CN107419734B (en) * | 2017-06-26 | 2020-12-11 | 深圳宏业基岩土科技股份有限公司 | Netted retaining structure of deep side slope that bankets |
| CN107700528A (en) * | 2017-11-22 | 2018-02-16 | 湖北工业大学 | A kind of pile body penetration type bankets body reinforcement bearing structure and construction method |
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