CN215986074U - Laboratory detection device for shield slurry film forming performance - Google Patents
Laboratory detection device for shield slurry film forming performance Download PDFInfo
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- CN215986074U CN215986074U CN202122240746.8U CN202122240746U CN215986074U CN 215986074 U CN215986074 U CN 215986074U CN 202122240746 U CN202122240746 U CN 202122240746U CN 215986074 U CN215986074 U CN 215986074U
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Abstract
The utility model relates to a laboratory detection device for shield slurry film-forming performance, and belongs to the technical field of tunnel engineering excavation. The device comprises a barrel, wherein the barrel comprises a mud chamber, a deionized water chamber, a powerful stirring mechanism and a stirring fan, two stainless steel wire meshes are arranged between the deionized water chamber and the mud chamber, and rock-soil bodies are added between the two stainless steel wire meshes; the powerful stirring mechanism is arranged in the slurry chamber and is connected with an external speed reducer and an external motor; the deionized water chamber is internally provided with the stirring fan; the cylinder body also comprises a grouting hole, a pressurizing hole, a feeding hole, a water discharging hole, a fluorescent lamp and an illumination intensity sensor. The method utilizes pressure difference to press the slurry from the slurry chamber into the deionized water chamber through the rock-soil body, and reflects the quality of the film forming performance of the slurry in a specific rock-soil body species by measuring the change of the light transmission capacity of the deionized water after the slurry enters.
Description
Technical Field
The utility model relates to a laboratory detection device for shield slurry film-forming performance, and belongs to the technical field of tunnel engineering excavation.
Background
In the last 20 years, China has built a plurality of river-crossing tunnels and water delivery tunnels, such as Nanjing Yangtze tunnel, Shanghai Yangtze tunnel, Hangzhou Qianjiang tunnel, south China water and North China Water transfer engineering and the like. Shenzhen, Wuhan, Hangzhou, Shanghai and the like still build a large number of cross-river tunnels. The slurry pressurizing shield is particularly suitable for excavation and supporting of underwater tunnels/tunnels. During construction, slurry is injected into a sealed compartment of the shield, and the stability of a soil body of an excavation surface is ensured through slurry pressurization and soil water pressure balance of the excavation surface. The pressurized mud permeates to the stratum of the excavation face, larger particles in the mud can be filtered on the surface of the stratum to form a mud film with small permeability, and the mud film enables the mud pressure to be converted into supporting force. The film forming performance of the slurry is the key for ensuring the effective transmission of pressure, so the quality of the film forming performance of the slurry directly influences the construction safety and progress. The existing slurry performance tests comprise density, viscosity, grain composition, sand content, water loss, pH value, stability, colloid rate and the like, and rarely relate to the test of film forming performance. The practical mud film forming ability check out test set of development can accelerate the trial-match process of mud, can shorten the time limit for a project again, has realistic meaning to the shield structure construction.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a laboratory detection device for the film forming property of shield slurry, which is used for pressing the slurry from a slurry chamber into a deionized water chamber through a rock-soil body by using pressure difference and reflecting the film forming property of the slurry in a specific rock-soil body by measuring the change of the light transmission capacity of the deionized water after the slurry enters.
In order to solve the problems, the utility model adopts the following technical scheme:
the laboratory detection device for the shield slurry film-forming property comprises a barrel, wherein a slurry chamber, a deionized water chamber, a powerful stirring mechanism and a stirring fan are arranged in the barrel, two stainless steel wire meshes are arranged between the deionized water chamber and the slurry chamber, and a rock-soil body is added between the two stainless steel wire meshes; the powerful stirring mechanism is arranged in the slurry chamber and is connected with an external speed reducer and an external motor; the deionized water chamber is internally provided with the stirring fan; the cylinder body also comprises a grouting hole, a pressurizing hole, a feeding hole, a water discharging hole, a fluorescent lamp and an illumination intensity sensor; the grouting holes and the pressurizing holes are formed in the top of the mud chamber; a water outlet and a fluorescent lamp are arranged at the top of the deionized water chamber, and an illumination intensity sensor is also arranged at the bottom of the deionized water chamber; the feed opening sets up in two stainless steel wire net tops.
Furthermore, the mud chamber and the deionized water chamber are cylindrical, the wall thickness is 5 mm-10 mm, the inner diameter is 30 cm-50 cm, and the length is 30 cm-50 cm.
Furthermore, meshes of the two stainless steel wire meshes are square, the side length of each mesh is 2-4 mm, the diameter of each steel wire is 0.5-1 mm, and the distance between the two stainless steel wire meshes is 5-8 cm.
Further, the fluorescent lamp is a directional emission fluorescent lamp, and the illumination intensity is 800-.
Further, the measurement range of the illumination intensity sensor is 0-1000 lux, and the measurement error is less than or equal to 2%.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the film forming performance of the slurry is difficult to test by using a conventional method, and the quality of the film forming performance of the slurry in a rock-soil body is obtained by changing the light transmission capacity of the deionized water chamber after the slurry enters the deionized water chamber from the slurry chamber through the rock-soil body under the action of the measured pressure difference. If the light transmission capacity is changed very little, the formed mud film can effectively prevent mud from penetrating; if the light transmission capacity is greatly changed, the formed mud film can not effectively prevent mud from penetrating. The used principle is clear, and the equipment is simple.
Drawings
For a clearer explanation of the solution of the utility model, the following brief description of the drawings required for this solution is given:
FIG. 1 is a front cross-sectional view of a laboratory testing device for shield slurry film-forming properties according to the present invention;
FIG. 2 is a top view of a laboratory testing device for shield slurry film-forming properties of the present invention.
Detailed Description
The technical solutions in the implementation of the present invention will be clearly and completely described below with reference to fig. 1-2 of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present invention may be practiced without departing from the spirit and scope of the present invention, and therefore the present invention is not limited to the examples disclosed below.
As shown in fig. 1-2, the laboratory detection device for the film forming property of shield slurry comprises a cylinder body, wherein the cylinder body comprises a slurry chamber 1, a deionized water chamber 2, a powerful stirring mechanism 3 and a stirring fan 4, two stainless steel wire meshes 5 are arranged between the deionized water chamber 2 and the slurry chamber 1, and rock-soil bodies are added between the two stainless steel wire meshes 5. The strong stirring mechanism 3 is arranged in the slurry chamber 1 and is connected with an external speed reducer and a motor. A stirring fan 4 is arranged in the deionized water chamber 2. The cylinder body also comprises a grouting hole 6, a pressurizing hole 7, a feeding hole 8, a water discharging hole 9, a fluorescent lamp 10 and an illumination intensity sensor 11. The injection hole 6 and the pressurizing hole 7 are provided at the top of the mud chamber 1. The top of the deionized water chamber 2 is provided with a water drainage hole 9 and a fluorescent lamp 10, and the bottom of the deionized water chamber 2 is also provided with an illumination intensity sensor 11. The feed opening 8 sets up in 5 tops of two stainless steel wire nets.
In the embodiment, the slurry chamber 1 and the deionized water chamber 2 are cylindrical, the wall thickness is 5 mm-10 mm, the inner diameter is 30 cm-50 cm, and the length is 30 cm-50 cm. The meshes of the two stainless steel wire meshes 5 are square, the side length of each mesh is 2-4 mm, the diameter of each steel wire is 0.5-1 mm, and the distance between the two stainless steel wire meshes 5 is 5-8 cm. The fluorescent lamp 10 used was a directional emission fluorescent lamp with an illumination intensity of 800-. The measurement range of the light intensity sensor 11 is 0-1000 lux, and the measurement error is less than or equal to 2%.
The laboratory detection method for the film-forming property of the shield slurry comprises the following steps:
the method comprises the following steps: manufacturing a laboratory detection device for the film-forming performance of the shield slurry;
step two: rock and soil samples are collected from the tunnel excavation surface and filled between the two stainless steel wire meshes 5 through the feeding holes 8; if the tunnel excavation surface is a sand layer, drying the sand sample, and preparing a simulated sand sample by a rain falling method;
step three: respectively and synchronously injecting slurry and deionized water into the slurry chamber 1 and the deionized water chamber 2, and starting the powerful stirring mechanism 3 after the slurry and the deionized water chambers are filled; the rotating speed of the strong stirring mechanism 3 is between 0.5 and 2.6 revolutions per minute, and the strong stirring mechanism rotates for 1 to 3 minutes;
step four: closing the water discharge hole 9 and pressurizing the mud chamber 1; the pressure in the slurry chamber 1 is 20-40kPa higher than that in the deionized water chamber 2, and the pressurizing time is 2-3 minutes;
step five: turning on the fluorescent lamp 10 and the light intensity sensor 11
After pressurizing for 2-3 minutes, turning on a fluorescent lamp 10 and an illumination intensity sensor 11, wherein the fluorescent lamp 10 is a directional emission device, the illumination intensity is 800-1000 lux, and the measurement range of the illumination intensity sensor 11 is 0-1000 lux;
step six: the illumination intensity measured by the illumination intensity sensor 11 is divided by the illumination intensity of the fluorescent lamp 10, the ratio of the illumination intensity measured by the illumination intensity sensor to the illumination intensity of the fluorescent lamp 10 is k, and the film forming performance of the slurry is evaluated according to the value of k.
In conclusion, although the embodiments of the present invention have been described, it should be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the principles and spirit of the present invention.
Claims (5)
1. The utility model provides a shield constructs mud film forming ability laboratory detection device, its includes the barrel, its characterized in that: the cylinder comprises a mud chamber (1), a deionized water chamber (2), a powerful stirring mechanism (3) and a stirring fan (4), wherein two stainless steel wire meshes (5) are arranged between the deionized water chamber (2) and the mud chamber (1), and rock-soil bodies are added between the two stainless steel wire meshes (5); the strong stirring mechanism (3) is arranged in the mud chamber (1) and is connected with an external speed reducer and an external motor; the deionized water chamber (2) is internally provided with the stirring fan (4); the barrel body also comprises a grouting hole (6), a pressurizing hole (7), a feeding hole (8), a water draining hole (9), a fluorescent lamp (10) and an illumination intensity sensor (11); the grouting holes (6) and the pressurizing holes (7) are arranged at the top of the mud chamber (1); a water drainage hole (9) and a fluorescent lamp (10) are formed in the top of the deionized water chamber (2), and an illumination intensity sensor (11) is further arranged at the bottom of the deionized water chamber (2); the feed opening (8) is arranged at the top of the two stainless steel wire meshes (5).
2. The laboratory testing device for the film-forming property of shield slurry according to claim 1, characterized in that: the mud chamber (1) and the deionized water chamber (2) are cylindrical, the wall thickness is 5-10 mm, the inner diameter is 30-50 cm, and the length is 30-50 cm.
3. The laboratory testing device for the film-forming property of shield slurry according to claim 1, characterized in that: the meshes of the two stainless steel wire meshes (5) are square, the side length of each mesh is 2-4 mm, the diameter of each steel wire is 0.5-1 mm, and the distance between the two stainless steel wire meshes (5) is 5-8 cm.
4. The laboratory testing device for the film-forming property of shield slurry according to claim 1, characterized in that: the fluorescent lamp (10) is a directional emission fluorescent lamp with an illumination intensity of 800-.
5. The laboratory testing device for the film-forming property of shield slurry according to claim 1, characterized in that: the measurement range of the illumination intensity sensor (11) is 0-1000 lux, and the measurement error is less than or equal to 2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122240746.8U CN215986074U (en) | 2021-09-16 | 2021-09-16 | Laboratory detection device for shield slurry film forming performance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122240746.8U CN215986074U (en) | 2021-09-16 | 2021-09-16 | Laboratory detection device for shield slurry film forming performance |
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| Publication Number | Publication Date |
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| CN215986074U true CN215986074U (en) | 2022-03-08 |
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| CN202122240746.8U Active CN215986074U (en) | 2021-09-16 | 2021-09-16 | Laboratory detection device for shield slurry film forming performance |
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2021
- 2021-09-16 CN CN202122240746.8U patent/CN215986074U/en active Active
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