阅读说明：本技术 一种上方补水的恒压冻胀三轴试验装置 (Constant-pressure frost heaving triaxial test device with water supplemented from top ) 是由 王磊 李方政 高伟 许舒荣 宁方波 张基伟 付财 孔令辉 方亮文 丁航 夏世法 于 2021-01-04 设计创作，主要内容包括：本发明公开一种上方补水的恒压冻胀三轴试验装置,包括支撑板和位于支撑板上方的加载板,所述支撑板的顶部开设有台阶通孔,所述台阶通孔的台阶处卡接有下冷板组件,所述加载板的底部设置有加长杆,所述加长杆的底部设置有上热板组件,所述加载板的两侧均设置有L型补水支撑架。本发明,通过在加载板的两侧安装L型补水支撑架,当冻胀发生后,实现热板抬升高度与马氏瓶抬升高度的一致,从而使上部补水可以连续进行,避免出现补水中断,通过设置上热板组件和下冷板组件,能够根据不同的需要设定冷板和热板的温度,从而测试不同温度下土样的冻胀变化。(The invention discloses a constant-pressure frost heaving triaxial test device with water supplied from the top, which comprises a support plate and a loading plate positioned above the support plate, wherein a step through hole is formed in the top of the support plate, a lower cold plate assembly is clamped at the step of the step through hole, an extension bar is arranged at the bottom of the loading plate, an upper hot plate assembly is arranged at the bottom of the extension bar, and L-shaped water supply support frames are arranged on two sides of the loading plate. According to the invention, the L-shaped water replenishing support frames are arranged on the two sides of the loading plate, after frost heaving occurs, the lifting height of the hot plate is consistent with that of the Malpighian bottle, so that water replenishing at the upper part can be continuously carried out, water replenishing interruption is avoided, and the temperatures of the cold plate and the hot plate can be set according to different requirements by arranging the upper hot plate assembly and the lower cold plate assembly, so that frost heaving changes of soil samples at different temperatures can be tested.)

1. The utility model provides a constant pressure frost heaving triaxial test device of top moisturizing, includes backup pad (1) and load plate (7) that are located backup pad (1) top, its characterized in that, step through-hole (2) have been seted up at the top of backup pad (1), the step department joint of step through-hole (2) has down cold plate subassembly (3), the bottom of load plate (7) is provided with extension bar (10), the bottom of extension bar (10) is provided with hot plate subassembly (11), the bottom of going up hot plate subassembly (11) corresponds each other with the top of cold plate subassembly (3) down, the both sides of load plate (7) all are provided with L type moisturizing support frame (9).

2. The constant-pressure frost heaving triaxial test device supplementing water from above according to claim 1, wherein the lower cold plate assembly (3) comprises a cold plate cover (16), a first sealing gasket (15) is arranged on the top of the cold plate cover (16), a cold plate (14) is arranged on the top of the first sealing gasket (15), the shapes of the cold plate cover (16), the first sealing gasket (15) and the cold plate (14) are all cylindrical and are arranged coaxially with each other, bolt fixing holes are formed in the bottom of the cold plate cover (16), the bottom of the first sealing gasket (15) and the bottom of the cold plate (14), bolts are arranged in the bolt fixing holes, the cold plate cover (16), the first sealing gasket (15) and the cold plate (14) are fixedly connected through bolts, a first liquid guide groove (17) is formed in the bottom of the cold plate (14), two threaded through holes are formed in the bottom of the cold plate cover (16), a liquid inlet pipe (23) and a liquid return pipe (24) are respectively connected in the two threaded through holes in a threaded manner, the end part of the liquid inlet pipe (23) is communicated with one end of the first liquid guide groove (17) through fluid, and the end part of the liquid return pipe (24) is communicated with the other end of the first liquid guide groove (17) through fluid; the bottom of the cold plate cover (16) is clamped in the step through hole (2).

3. The constant-pressure frost heaving triaxial test device supplementing water from above according to claim 1, wherein the upper hot plate assembly (11) comprises a hot plate (18), a second sealing gasket (19) is arranged on the top of the hot plate (18), a hot plate cover (20) is arranged on the top of the second sealing gasket (19), the hot plate cover (20), the second sealing gasket (19) and the hot plate (18) are fixedly connected through bolts, a second liquid guide groove (22) is formed in the top of the hot plate (18), a water supplementing through hole (12) is formed in the middle of the top of the hot plate (18), the top of the hot plate cover (20) is respectively communicated with a liquid inlet pipe (23), a liquid return pipe (24) and a water supplementing pipe (21), the end of the liquid inlet pipe (23) is in fluid communication with one end of the second liquid guide groove (22), and the end of the liquid return pipe (24) is in fluid communication with the other end of the second liquid guide groove (22), the end part of the water replenishing pipe (21) is communicated with the fluid of the water replenishing through hole (12); the top of the hot plate cover (20) is provided with a threaded blind hole, the side wall of the extension bar (10) is provided with an external thread, and the bottom end of the extension bar (10) is connected in the threaded blind hole in a threaded manner.

4. The constant-pressure frost heaving triaxial test device supplementing water from above according to claim 1, wherein the bottom of the support plate (1) is uniformly provided with three threaded through holes along the circumferential direction, and the three threaded through holes are internally and respectively in threaded connection with a screw (4).

5. The constant-pressure frost heaving triaxial test device supplementing water from above according to claim 1, wherein through holes are formed in two sides of the top of the support plate (1), stainless steel guide rods (5) are fixedly connected in the through holes, two other through holes corresponding to the through holes in the bottom of the support plate (1) are formed in the bottom of the loading plate (7), linear bearings (6) are fixedly connected in the through holes in the bottom of the loading plate (7), and the stainless steel guide rods (5) are movably arranged in the linear bearings (6) in a penetrating manner.

6. The constant-pressure frost heaving triaxial test device capable of replenishing water from above according to claim 1, wherein angle steel (8) is fixedly connected to both sides of the bottom of the loading plate (7), a through hole is formed in the side wall of the angle steel (8), a waist-shaped hole corresponding to the side wall of the angle steel (8) is formed in the side wall of the L-shaped water replenishing support frame (9) along the long side of the side wall of the L-shaped water replenishing support frame, the waist-shaped hole in the side wall of the L-shaped water replenishing support frame (9) and the through hole in the side wall of the angle steel (8) are provided with a same bolt, and the L-shaped water replenishing support frame (9) and the.

7. The constant-pressure frost heaving triaxial test device supplementing water from above according to claim 1, wherein the same acrylic cylinder (13) is sleeved on the side walls of the upper hot plate assembly (11) and the lower cold plate assembly (3).

Technical Field

The invention relates to the technical field of frost heaving tests. In particular to a constant pressure frost heaving triaxial test device with water supplemented from the upper part.

Background

The frost heaving deformation of the soil body in the freezing process is the frost heaving amount, most of the conventional frost heaving triaxial experimental devices are used for supplementing water to the lower part of a sample, the upper end of the sample is provided with a cold plate, and the lower end of the sample is provided with a hot plate, and the water supplementing method is the same as the natural freezing working condition, so that the method is mainly used for testing the frost heaving amount generated by natural freezing of the soil body; traditional lower part moisturizing frost heaving triaxial experimental apparatus carries out the moisturizing operation after, and frost heaving takes place the back soil body and produces the lifting, leads to the high lifting of upper portion moisturizing end, and the mahalanobis bottle that is used for the moisturizing of upper portion highly unchangeable to produce the water head, cause the moisturizing and interrupt, can't continue to the sample moisturizing, cause to freeze the experiment and interrupt.

Disclosure of Invention

Therefore, the invention aims to provide a constant-pressure frost heaving triaxial test device capable of continuously supplementing water upwards and supplementing water upwards in proportion to adjustment.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a constant voltage frost heaving triaxial test device of top moisturizing, includes backup pad and the loading plate that is located the backup pad top, the step through-hole has been seted up at the top of backup pad, the step department joint of step through-hole has lower cold plate subassembly, the bottom of loading plate is provided with the extension bar, the bottom of extension bar is provided with the hot plate subassembly, the bottom of going up the hot plate subassembly corresponds each other with the top of lower cold plate subassembly, the both sides of loading plate all are provided with L type moisturizing support frame.

The constant-pressure frost heaving triaxial test device with water supplemented from the upper part comprises a lower cold plate assembly and a lower cold plate assembly, the top of the cold plate cover is provided with a first sealing gasket, the top of the first sealing gasket is provided with a cold plate, the cold plate cover, the first sealing gasket and the cold plate are all cylindrical and are arranged coaxially with each other, the bottom of the cold plate cover, the bottom of the first sealing gasket and the bottom of the cold plate are all provided with bolt fixing holes, and bolts are arranged in the bolt fixing holes, the cold plate cover, the first sealing gasket and the cold plate are fixedly connected through bolts, a first liquid guide groove is formed in the bottom of the cold plate, the bottom of the cold plate cover is provided with two thread through holes, a liquid inlet pipe and a liquid return pipe are respectively connected in the two thread through holes in a thread way, the end part of the liquid inlet pipe is communicated with one end of the first liquid guide groove by fluid, and the end part of the liquid return pipe is communicated with the other end of the first liquid guide groove by fluid; the bottom of the cold plate cover is clamped in the step through hole.

The constant-pressure frost heaving triaxial test device with water supplemented from the upper part comprises a hot plate, a second sealing gasket is arranged at the top of the hot plate, a hot plate cover is arranged at the top of the second sealing gasket, the hot plate cover, the second sealing gasket and the hot plate are fixedly connected through bolts, a second liquid guide groove is formed in the top of the hot plate, a water supplementing through hole is formed in the middle of the top of the hot plate, the top of the hot plate cover is respectively communicated with a liquid inlet pipe, a liquid return pipe and a water supplementing pipe, the end part of the liquid inlet pipe is communicated with one end of the second liquid guide groove, the end part of the liquid return pipe is communicated with the other end of the second liquid guide groove, and the end part of the water supplementing pipe is communicated with the water; the hot plate cover is characterized in that a threaded blind hole is formed in the top of the hot plate cover, external threads are arranged on the side wall of the extension rod, and the bottom end of the extension rod is connected in the threaded blind hole in a threaded mode.

Above-mentioned constant voltage frost heaving triaxial test device of top moisturizing, three screw thread through-hole has evenly been seted up along its circumference in the bottom of backup pad, and equal threaded connection has the screw rod in the three screw thread through-hole.

Above-mentioned constant pressure frost heaving triaxial test device of top moisturizing, the through-hole has been seted up to the top both sides of backup pad, fixedly connected with stainless steel guide arm in the through-hole, two other through-holes that correspond with backup pad bottom through-hole are seted up to the bottom of loading plate, fixedly connected with linear bearing in the through-hole of loading plate bottom, the activity of stainless steel guide arm is worn to establish in linear bearing.

Above-mentioned constant voltage frost heaving triaxial test device of top moisturizing, the equal fixedly connected with angle steel in bottom both sides of load plate, the through-hole has been seted up to the lateral wall of angle steel, the waist type hole that corresponds with the angle steel lateral wall is seted up along its long limit to the lateral wall of L type moisturizing support frame, wear to be equipped with same bolt and L type moisturizing support frame and angle steel and pass through bolt fixed connection in the waist type hole of L type moisturizing support frame lateral wall and the through-hole of angle steel lateral wall.

Above-mentioned constant pressure frost heaving triaxial test device of top moisturizing, go up the lateral wall of hot plate subassembly and cold drawing subassembly down and cup jointed same ya keli drum.

1. According to the invention, the L-shaped water replenishing support frames are arranged on the two sides of the loading plate, so that the Ma bottle can be conveniently placed, and after frost heaving occurs, the lifting height of the hot plate is consistent with that of the Ma bottle, so that water replenishing at the upper part can be continuously carried out, water replenishing interruption is avoided, and the working condition of an artificial freezing test is better fitted.

2. According to the invention, by arranging the upper cold plate assembly and the lower cold plate assembly, the temperatures of the cold plate and the hot plate can be set according to different requirements, so that frost heaving changes of soil samples at different temperatures can be tested, frost heaving soil experiments can be conveniently carried out, and references can be provided for frost heaving amount changes in freezing engineering; and the second liquid guide groove has been seted up on the surface of hot plate, and first liquid guide groove has been seted up on the surface of cold plate, and cold liquid of low temperature flows in first liquid guide groove, and cold liquid of normal atmospheric temperature flows in second liquid guide groove, makes the temperature of cold drawing and hot plate more even, improves the homogeneity that the frost heaving soil sample frost heaving, and the top of hot plate and the top of cold drawing all are provided with sealed the pad, thereby can effectively avoid revealing of refrigerant to produce the interference to the frost heaving test.

3. According to the invention, the loading plate is arranged, the height of the loading plate can be guided along the stainless steel guide rod fixed at the top of the supporting plate, the overlying loading plate is prevented from inclining or falling, the top of the loading plate can be provided with the balancing weights with different weights for simulating the frost heaving variation of the soil sample under different overlying pressures, the constant pressure loading is realized, and the bottom of the supporting plate is provided with the three screw rods, so that the levelness of the supporting plate after being placed can be adjusted.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic side view of the cross-sectional structure of the present invention;

FIG. 3 is a schematic perspective view of a cold plate assembly of the present invention;

FIG. 4 is a schematic view of a cold plate according to the present invention;

FIG. 5 is a schematic perspective view of an upper heat plate assembly of the present invention;

FIG. 6 is a schematic view of the construction of a hot plate according to the present invention;

the reference numbers in the figures denote: 1-a support plate; 2-step through holes; 3-a cold plate assembly; 4-screw rod; 5-stainless steel guide rods; 6-linear bearings; 7-a loading plate; 8-angle steel; 9-L type water replenishing support frame; 10-extension bar; 11-an upper hot plate assembly; 12-a water replenishing through hole; 13-an acrylic cylinder; 14-cold plates; 15-a first gasket; 16-cold plate cover; 17-a first liquid guide groove; 18-hot plate; 19-a second gasket; 20-hot plate cover; 21-water replenishing pipe; 22-a second liquid guide groove; 23-a liquid inlet pipe; 24-liquid return pipe.

Detailed Description

Referring to fig. 1-2, a constant-pressure frost heaving triaxial test device with water replenishing from the top comprises a support plate 1 and a loading plate 7 located above the support plate 1, wherein three threaded through holes are uniformly formed in the bottom of the support plate 1 along the circumferential direction of the support plate, screws 4 are connected in the three threaded through holes in a threaded manner, through holes are formed in two sides of the top of the support plate 1, a stainless steel guide rod 5 is fixedly connected in each through hole, the bottom of the loading plate 7 is provided with two other through holes corresponding to the through holes in the bottom of the support plate 1, a linear bearing 6 is fixedly connected in each through hole in the bottom of the loading plate 7, the stainless steel guide rod 5 is movably arranged in the linear bearing 6 in a penetrating manner, a step through hole 2 is formed in the top of the support plate 1, and.

As shown in fig. 3-4, the lower cold plate assembly 3 includes a cold plate cover 16, a first sealing pad 15 is disposed on the top of the cold plate cover 16, a cold plate 14 is disposed on the top of the first sealing pad 15, the shapes of the cold plate cover 16, the first sealing pad 15 and the cold plate 14 are all cylindrical and are coaxially disposed with each other, bolt fixing holes and bolts are disposed in the bolt fixing holes are disposed at the bottom of the cold plate cover 16, the bottom of the first sealing pad 15 and the bottom of the cold plate 14, the cold plate cover 16, the first sealing pad 15 and the cold plate 14 are fixedly connected by bolts, a first liquid guide groove 17 is disposed at the bottom of the cold plate 14, two threaded through holes are disposed at the bottom of the cold plate cover 16, a liquid inlet pipe 23 and a liquid return pipe 24 are respectively connected by threads in the two threaded through holes, an end of the liquid inlet pipe 23 is in fluid communication with one end of the first liquid guide groove 17, the end of the liquid return pipe 24 is in fluid communication with the other end of the first liquid guide groove 17; the bottom of the cold plate cover 16 is clamped in the step through hole 2, the bottom of the loading plate 7 is provided with an extension bar 10, the bottom of the extension bar 10 is provided with an upper hot plate assembly 11, as shown in fig. 5-6, the upper hot plate assembly 11 comprises a hot plate 18, the top of the hot plate 18 is provided with a second sealing gasket 19, the top of the second sealing gasket 19 is provided with a hot plate cover 20, the second sealing gasket 19 and the hot plate 18 are fixedly connected through bolts, the top of the hot plate 18 is provided with a second liquid guide groove 22, the middle of the top of the hot plate 18 is provided with a water supplementing through hole 12, the top of the hot plate cover 20 is respectively communicated with a liquid inlet pipe 23, a liquid return pipe 24 and a water supplementing pipe 21, the end of the liquid inlet pipe 23 is in fluid communication with one end of the second liquid guide groove 22, the end of the liquid return pipe 24 is in fluid, the end part of the water replenishing pipe 21 is communicated with the water replenishing through hole 12; the top of the hot plate cover 20 is provided with a threaded blind hole, the side wall of the extension bar 10 is provided with an external thread, the bottom end of the extension bar 10 is in threaded connection with the threaded blind hole, the bottom of the upper hot plate assembly 11 corresponds to the top of the lower cold plate assembly 3, and the temperatures of the cold plate 14 and the hot plate 18 can be set according to different requirements by arranging the upper hot plate assembly 11 and the lower cold plate assembly 3, so that frost heaving changes of soil samples at different temperatures can be tested, frost heaving experiments can be conveniently carried out, and reference is provided for frost heaving amount changes in freezing engineering; and the surface of the hot plate 18 is provided with a second liquid guide groove 22, the surface of the cold plate 14 is provided with a first liquid guide groove 17, low-temperature cold liquid flows in the first liquid guide groove 17, normal-temperature cold liquid flows in the second liquid guide groove 22, so that the temperatures of the cold plate 14 and the hot plate 18 are more uniform, the frost heaving uniformity of a frost heaving soil sample is improved, the tops of the hot plate 18 and the cold plate 14 are both provided with sealing gaskets, the leakage of a refrigerant can be effectively avoided, the frost heaving test is interfered, the two sides of the loading plate 7 are both provided with L-shaped water replenishing support frames 9, L-shaped water replenishing support frames 9 are mounted on the two sides of the loading plate 7, a Ma bottle can be conveniently placed, after frost heaving occurs, the lifting height of the hot plate 18 is consistent with the lifting height of the Ma bottle, so that water replenishing on the upper portion can be continuously performed, water replenishing interruption is avoided, the working condition of a, the through-hole has been seted up to angle steel 8's lateral wall, the waist type hole that corresponds with angle steel 8 lateral wall is seted up along its long limit to L type moisturizing support frame 9's lateral wall, wear to be equipped with same bolt and L type moisturizing support frame 9 and angle steel 8 in the waist type hole of L type moisturizing support frame 9 lateral wall and the through-hole of angle steel 8 lateral wall and pass through bolt fixed connection, through setting up loading plate 7, and loading plate 7's height can be followed and fixed the stainless steel guide arm 5 at 1 top in backup pad and lead, prevent that loading plate 7 that covers from inclining or toppling over, and the balancing weight of different weights can be placed at loading plate 7's top for the simulation is different to be covered the soil sample frost heaving variable quantity under the pressure, realize the constant voltage loading, three screw rod 4 is installed to backup pad 1's.

The side walls of the upper hot plate assembly 11 and the lower cold plate assembly 3 are sleeved with the same acrylic cylinder 13.

The working process is as follows: when the device is used, a soil sample is placed at the top of the lower cold plate component 3, the surface of the lower cold plate component 3 is sleeved with the acrylic cylinder 13, the height of the loading plate 7 is adjusted, the bottom of the upper hot plate component 11 is attached to the top of the soil sample, the Ma bottle for supplementing water is placed on the L-shaped water supplementing support frames 9 at two sides of the loading plate 7, the water supplementing hose of the Ma bottle is communicated with the water supplementing pipe 21 of the upper hot plate component 11 to supplement water to the soil sample, the backflow end and the liquid outlet end of the external normal-temperature cold liquid circulating device are respectively communicated with the liquid inlet pipe 23 and the liquid return pipe 24 of the upper hot plate component 11 through pipelines, the backflow end and the liquid outlet end of the low-temperature cold liquid circulating device are respectively communicated with the liquid inlet pipe 23 and the liquid return pipe 24 of the lower cold plate component 3 through pipelines, the normal-temperature cold liquid circulating device and the low-temperature cold liquid circulating device are not shown in the figure, the normal-temperature cold liquid circulating device conveys liquid to the second liquid guide groove 22, the low-temperature cold liquid circulating device inputs the low-temperature cold liquid into the first liquid guide groove 17 of the cold plate 14 through a pipeline and reflows the low-temperature cold liquid, and the frost heaving experiment of the soil sample is carried out.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.