CN-116893125-B - Geotechnical water distribution characteristic curve measuring device

CN116893125BCN 116893125 BCN116893125 BCN 116893125BCN-116893125-B

Abstract

The invention relates to the field of geotechnical water distribution characteristic curve measurement and discloses a geotechnical water distribution characteristic curve measurement device which comprises a fixed box, a length adjustment box body and a test box which are connected in a sliding nested mode in sequence, wherein the fixed box, the length adjustment box body and the test box are sequentially communicated and used for allowing a piece to be measured to sequentially pass through, an imbedding opening for placing the piece to be measured is formed in the fixed box, a through hole communicated with the outside is formed in the test box, a clamping mechanism is arranged on the fixed box and used for clamping or releasing one end of the piece to be measured, a cutting mechanism for cutting the piece to be measured is slidably arranged on the length adjustment box body along the direction perpendicular to the height direction of the length adjustment box body, a first linear driving mechanism is connected with the fixed box and the length adjustment box body and used for adjusting the distance between the fixed box and the length adjustment box body, and a second linear driving mechanism is connected with the length adjustment box body and the test box and used for adjusting the distance between the fixed box and the length adjustment box. The device can be used for measuring the moisture characteristic curve of the geotechnical cloth more efficiently.

Inventors

ZHU DONGPENG
WANG MEIXIA
YANG WEIMIN
SHI BAOHUI
CHEN JIANBING
LIU LANG
WANG MINGTIAN
SHANG YUANYUAN
YUAN YUAN
LI ZIJUN

Assignees

山东大学
中交第一公路勘察设计研究院有限公司
青岛大学

Dates

Publication Date: 20260512
Application Date: 20230711

Claims (10)

1. The geotechnical water distribution characteristic curve measuring device is characterized by comprising: The device comprises a fixed box, a length adjusting box body and a test box which are connected in a sliding nested manner in sequence, wherein the fixed box, the length adjusting box body and the test box are communicated in sequence so that a piece to be tested can pass through in sequence, an imbedding opening for placing the piece to be tested is formed in the fixed box, and a through opening communicated with the outside is formed in the test box; The clamping mechanism is arranged on the fixed box and is used for clamping or releasing one end of the piece to be tested; the cutting mechanism is used for cutting the to-be-detected piece, the number of the length adjustment box bodies is at least two, the cutting mechanism corresponds to the length adjustment box bodies one by one, and any length adjustment box body is slidably provided with the cutting mechanism along the direction perpendicular to the height direction of the length adjustment box body; The first linear driving mechanism is connected with the fixed box and the length adjusting box body and is used for adjusting the distance between the fixed box and the length adjusting box body; and the second linear driving mechanism is connected with the length adjusting box body and the test box and is used for adjusting the distance between the length adjusting box body and the test box.
2. The geotechnical water distribution characteristic curve measuring device according to claim 1, further comprising a third linear driving mechanism, wherein any two adjacent length adjusting box bodies are connected through the third linear driving mechanism, and the third linear driving mechanism is used for adjusting the distance between the two adjacent length adjusting box bodies.
3. The geotechnical water distribution characteristic curve measuring device according to claim 2, wherein the length adjusting box body comprises a cutting box and an intermediate connecting box which are communicated and connected; The cutting box closest to the length adjusting box body of the fixed box is connected with the fixed box in a sliding nested manner and communicated with the fixed box, and the cutting box and the fixed box are connected through a first linear driving mechanism; The middle connecting box closest to the length adjusting box body of the test box is connected with the fixed box in a sliding nested manner and communicated with the fixed box, and the middle connecting box and the fixed box are connected through a second linear driving mechanism; The middle connecting box of one of the two adjacent length adjusting box bodies is in sliding nested connection with the cutting box of the other, and is communicated with the cutting box of the other, and the middle connecting box and the cutting box are connected through a third linear driving mechanism; any cutting box is provided with the cutting mechanism.
4. The geotechnical cloth moisture characteristic curve measuring device according to claim 3, wherein the first linear driving mechanism comprises a first screw rod and a first mounting sleeve, a first mounting hole is formed in the cutting box closest to the length adjusting box body of the fixing box, the first mounting sleeve can be rotatably arranged in the first mounting hole, the first mounting sleeve is axially positioned, the first screw rod is fixedly connected with the fixing box, and one end of the first screw rod is arranged in the first mounting sleeve and is in threaded connection with the inner wall of the first mounting sleeve; The second linear driving mechanism comprises a second screw rod and a second mounting sleeve, a second mounting hole is formed in the test box, the second mounting sleeve can be rotatably arranged in the second mounting hole, the second mounting sleeve is axially positioned, the second screw rod is arranged on the middle connecting box closest to the length adjusting box body of the test box, and one end of the second screw rod is arranged in the second mounting sleeve and is in threaded connection with the inner wall of the second mounting sleeve; The third linear driving mechanism comprises a third screw rod and a third mounting sleeve, a third mounting hole is formed in the cutting box, the third mounting sleeve can be rotatably arranged in the third mounting hole, the third mounting sleeve is axially positioned, the third screw rod is arranged on the middle connecting box, and one end of the third screw rod is arranged in the third mounting sleeve and is in threaded connection with the inner wall of the third mounting sleeve.
5. The geotechnical cloth moisture characteristic curve measuring device according to claim 3, wherein the fixing box is arranged close to one end of the length adjustment box body in an open mode, a first concave cavity matched with the fixing box in shape is formed in the cutting box closest to the length adjustment box body of the fixing box, and one end of the fixing box close to the length adjustment box body is arranged in the first concave cavity and is in sliding connection with the first concave cavity; The cutting box is arranged at one end far away from the middle connecting box in an open way, so that the cutting box closest to the length adjusting box body of the fixed box is communicated with the fixed box and the adjacent cutting box and the middle connecting box are communicated; The two ends of the middle connecting box are respectively opened to realize the communication between the middle connecting box closest to the length adjusting box body of the test box and the communication between the adjacent middle connecting box and the cutting box; The test box is provided with a second concave cavity matched with the middle connecting box closest to the test box in shape, and one end of the middle connecting box closest to the test box is arranged in the second concave cavity and is in sliding connection with the second concave cavity; The rest length adjustment box body cut and be provided with on the box with middle junction box shape assorted third cavity, middle junction box be close to cut the one end of box set up in the third cavity, and with third cavity sliding connection.
6. The geotextile moisture characteristic curve measuring apparatus as set forth in claim 3, wherein one of said intermediate connection box and said cutting box of the same length adjustment box body is provided with a recess portion which is matched with the other, and the other is partially provided in said recess portion and is detachably connected to the other.
7. The geotechnical cloth moisture characteristic curve measuring device according to claim 3, wherein the cutting mechanism comprises a cutting knife and a driving mechanism, the cutting knife is used for cutting the piece to be measured, one end, close to the middle connecting box, of the cutting box is provided with a communicating opening used for communicating the middle connecting box, the side wall of the communicating opening is provided with a mounting groove, the cutting knife is in sliding connection with the mounting groove, the driving mechanism is arranged on the cutting box, and the driving mechanism is used for driving the cutting knife to move towards a direction close to or away from the piece to be measured.
8. The geotechnical water distribution characteristic curve measuring device according to claim 7, further comprising a middle connecting piece, wherein the driving mechanism is a manual driving mechanism, the driving mechanism is arranged outside the cutting box, a guide groove is formed in the side wall of the cutting box, the length direction of the guide groove is parallel to the length direction of the mounting groove, the driving mechanism is connected with the cutting knife through the middle connecting piece, and the middle connecting piece is connected with the guide groove in a sliding mode.
9. The geotechnical water distribution characteristic curve measuring device according to claim 1 or 2, wherein the clamping mechanism comprises two clamping plates, the insertion opening is arranged at one end of the fixing box, which is far away from the length adjusting box body, two sliding grooves are oppositely formed in two opposite side walls of the insertion opening, the two clamping plates can be respectively arranged in the two sliding grooves in a sliding manner, the two clamping plates can be detachably connected, and one end of the piece to be measured can be clamped between the two clamping plates.
10. The geotechnical water distribution characteristic curve measuring device according to claim 1 or 2, wherein a first scale mark is arranged on the outer side wall of the fixed box along the height direction of the fixed box, and a second scale mark is arranged on the outer side wall of the length adjusting box along the height direction of the length adjusting box.

Description

Geotechnical water distribution characteristic curve measuring device Technical Field The invention relates to the field of geotechnical water distribution characteristic curve measurement, in particular to a geotechnical water distribution characteristic curve measurement device. Background With the continuous perfect development of the traffic system in China, it is important to delay the damage of roadbeds and increase the service lives of roadbeds. The roadbed in the region of multiple rainfall and high-cold frozen soil is affected by the groundwater level, so that moisture invades the soil body, seepage and freezing injury are easy to occur, the physical and mechanical indexes of the soil body are changed, and the roadbed strength is attenuated to some extent. The geotextile which is commonly used for reinforcing the roadbed in the past has excellent drainage performance, and can reduce the water content of the roadbed, so that the service life of the roadbed is prolonged, and the strength of the roadbed is maintained. However, geotextiles of different types and materials may have great difference in water absorption performance, and in order to determine the quality of the water absorption performance of the geotextile, the moisture characteristic curve of the geotextile needs to be measured. The method is characterized in that a water characteristic curve is measured in a laboratory, wherein the water characteristic curve is mainly measured through geotechnical cloth capillary water rising test, a comparison group is required to be arranged for each test, geotechnical cloth is firstly hung on a support in a flush mode, the lower portion of the geotechnical cloth is immersed in water, the geotechnical cloth is taken down after the geotechnical cloth absorbs water, the geotechnical cloth is cut by scissors after the geotechnical cloth is taken out for a fixed length manually, the cut geotechnical cloth segments are placed into a weighed container to be weighed together, the geotechnical cloth segments are placed into a drying box together, the water content of the geotechnical cloth segments can be obtained after the geotechnical cloth is taken out and weighed after the geotechnical cloth is dried, and then the horizontal characteristic curve of the geotechnical cloth is obtained. In order to prevent moisture evaporation from influencing the accuracy of the test caused by exposure to air after the geotechnical cloth absorbs water in the existing test operation process, the geotechnical cloth needs to be wrapped with a preservative film to seal the geotechnical cloth, so that the efficiency is lower. Therefore, there is a need for a more efficient means to achieve capillary water lift method for measuring the moisture profile of geotextiles. Disclosure of Invention In order to solve the technical problems, the invention provides the geotechnical water distribution characteristic curve measuring device which can more efficiently measure the moisture characteristic curve of geotechnical cloth by a capillary water rising method. In order to achieve the above object, the present invention provides the following solutions: the invention provides a geotechnical water distribution characteristic curve measuring device, which comprises: The device comprises a fixed box, a length adjusting box body and a test box which are connected in a sliding nested manner in sequence, wherein the fixed box, the length adjusting box body and the test box are communicated in sequence so that a piece to be tested can pass through in sequence, an imbedding opening for placing the piece to be tested is formed in the fixed box, and a through opening communicated with the outside is formed in the test box; The clamping mechanism is arranged on the fixed box and is used for clamping or releasing one end of the piece to be tested; the cutting mechanism is used for cutting the to-be-detected piece and is arranged on the length adjustment box body in a sliding manner along the height direction perpendicular to the length adjustment box body; The first linear driving mechanism is connected with the fixed box and the length adjusting box body and is used for adjusting the distance between the fixed box and the length adjusting box body; and the second linear driving mechanism is connected with the length adjusting box body and the test box and is used for adjusting the distance between the length adjusting box body and the test box. Optionally, the geotechnical water distribution characteristic curve measuring device further comprises a third linear driving mechanism, the number of the length adjustment box bodies is at least two, any two adjacent length adjustment box bodies are all connected through the third linear driving mechanism, and the third linear driving mechanism is used for adjusting the distance between the two adjacent length adjustment box bodies. Optionally, the length adjusting box body comprises a cutting box and an in