CN110082211B - Speed-limiting type quick detection device and detection method for strength of fluidized soil - Google Patents

Speed-limiting type quick detection device and detection method for strength of fluidized soil Download PDF

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CN110082211B
CN110082211B CN201910432557.5A CN201910432557A CN110082211B CN 110082211 B CN110082211 B CN 110082211B CN 201910432557 A CN201910432557 A CN 201910432557A CN 110082211 B CN110082211 B CN 110082211B
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detection
soil
soil body
speed
pressing
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CN110082211A (en
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周爱兆
张凯东
徐浩青
姜朋明
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Jiangsu University of Science and Technology
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Jiangsu University of Science and Technology
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Priority to LU101714A priority patent/LU101714B1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/14—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by dead weight, e.g. pendulum; generated by springs tension
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D1/00—Investigation of foundation soil in situ
    • E02D1/02—Investigation of foundation soil in situ before construction work
    • E02D1/027—Investigation of foundation soil in situ before construction work by investigating properties relating to fluids in the soil, e.g. pore-water pressure, permeability
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/06—Special adaptations of indicating or recording means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/40—Investigating hardness or rebound hardness
    • G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/24—Earth materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0076—Hardness, compressibility or resistance to crushing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0092—Visco-elasticity, solidification, curing, cross-linking degree, vulcanisation or strength properties of semi-solid materials
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/022—Environment of the test
    • G01N2203/0244—Tests performed "in situ" or after "in situ" use
    • G01N2203/0246—Special simulation of "in situ" conditions, scale models or dummies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0284—Bulk material, e.g. powders
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0676—Force, weight, load, energy, speed or acceleration

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Remote Sensing (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • Structural Engineering (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

The invention discloses a speed-limiting type rapid detection device and a detection method for the strength of fluidized soil, wherein the detection device comprises a frame body and a pressing device penetrating through the top of the frame body, and a liquid speed limiting device in the frame body; the detection method comprises the steps of pressing down the pressing device to enable the detection tube to be pressed into the soil body to be detected, and resetting the pressing device; recording the depth of the soil body before and after the detection pipe is pressed into the soil body; the depth of the soil body is multiplied by the elasticity coefficient of the elastic component to obtain the force when the detection tube punctures the soil body, and then the force is divided by the area of the contact cross section of the detection tube and the soil body to be detected to obtain the pressure intensity when the soil body is punctured, namely the compressive strength of the soil body. The invention has simple operation, and can read the compressive strength of the soil body only by pressing operation; the field measurement can be realized; the data result is reliable and the error is small.

Description

Speed-limiting type quick detection device and detection method for strength of fluidized soil
Technical Field
The invention relates to a detection device and a detection method for civil materials, in particular to a rapid detection device and a rapid detection method for the strength of speed-limiting fluidized soil.
Background
In engineering construction, unconfined compressive strength refers to the ultimate strength of a solidified soil sample for resisting axial stress under the condition of no lateral pressure, is the most basic mechanical property index of solidified soil, and is one of important indexes for evaluating the solidification effect of cement or other cementing materials on soil. The existing method for detecting the unconfined compressive strength of the soil body mainly comprises two steps: one is in-situ sampling, then testing in a laboratory; the other is to mix, maintain and measure in a laboratory according to the proportion on site. However, both of these methods have certain problems: for on-site sampling, the following disadvantages exist: (1) can affect the constructed site; (2) the sampling or soil cutting process at the later stage can cause disturbance to the sample, so that the test result is distorted. For laboratory preparation methods, the following disadvantages exist: (1) the mixing process of laboratory materials is different from the mixing process in the field, which may cause distortion of the measured results; (2) the maintenance conditions in the laboratory are different from those in the field, and the development trend of the strength of the solidified soil is different, so that the measured result may be distorted.
Patent No. CN201811590722 discloses a semi-quantitative unconfined compressive strength tester, which provides a semi-quantitative unconfined compressive strength tester, but has the following disadvantages: (1) complicated operation: sampling is required on site, and then measurement is performed in a laboratory; (2) not enough convenient: multiple weight-sending weights are used in the testing process, and the operation is complex.
Disclosure of Invention
The invention aims to: the invention aims to provide a speed-limiting type rapid detection device for the intensity of flowing soil, and another aim is to provide a detection method of the speed-limiting type rapid detection device for the intensity of flowing soil. The detection device is simple to operate, convenient to use, capable of carrying out in-situ measurement on the soil body to be detected, and small in result reliability error and small in influence on construction sites.
The technical scheme is as follows: the invention provides a speed-limiting type rapid detection device for the strength of fluidized soil, which comprises a frame body, a pressing device penetrating through the top of the frame body, and a liquid speed limiting device in the frame body; the pressing device comprises a first pressing rod and a plurality of second pressing rods which are arranged along the circumferential direction of the pressing rod and are parallel to the pressing rod, a cavity for accommodating an elastic member and part of the detection tube is formed in the bottom of the first pressing rod, two ends of the elastic member are fixedly connected with the top of the cavity and the top of the detection tube respectively, and a hole through which the detection tube can pass is formed in the bottom of the frame; the liquid speed limiting device comprises hydraulic cylinders and storage cylinders, the number of the hydraulic cylinders and the number of the storage cylinders are the same as that of the second compression rods, the first pistons and the second pistons are respectively arranged in the hydraulic cylinders and the storage cylinders, the first pistons are fixedly connected with the second compression rods, liquid is filled in the hydraulic cylinders, the bottom of each hydraulic cylinder is provided with a pipeline connected with the bottom of each storage cylinder, and the pressing device drives the pistons to move up and down to enable the liquid to flow back and forth between the hydraulic cylinders and the storage cylinders.
The frame body is a hollow cylinder or a prism, and a vertical strip-shaped notch corresponding to the detection tube can be arranged on the frame body, so that the observation is convenient; the elastic member is made of elastic material with known elastic coefficient, and can be a spring or other elastic material made parts; the liquid filled in the speed limiting device can be ordinary water or saline solution, the density of the saline solution is slightly higher than that of the pure water, and the speed limiting effect of the device is better.
Further, the bottom of the detection tube is connected with a lower end tube which is detachable. The lower end pipes with different sizes can be designed according to different soil bodies to be tested, and different lower end pipes are installed according to actual soil bodies to be tested so as to reduce errors; when the soil to be measured is softer (such as sandy soil and silt soil), selecting a lower end pipe with a larger cross section; when the soil to be measured is harder (such as hard and dense cohesive soil), a lower end pipe with a larger cross section is selected. Because the spring coefficient of the spring is in a certain range, the device adjusts the cross-sectional area through different earthiness so as to ensure that the spring range is not exceeded, and the obtained data is effective.
In order to conveniently read and record the depth of soil body which is pressed into the soil body to be measured before and after the soil body is pressed into the soil body, the detection pipe is sleeved with a sliding ring which can slide up and down along the detection pipe and is positioned below the first pressure rod. Before the pressing device is pressed down, the position of the sliding ring is recorded; after the pressing device is pressed down, the first pressing rod moves downwards, so that the sliding ring is driven to slide downwards on the detection pipe, and the position of the sliding ring is recorded again; therefore, the sliding distance of the sliding ring can be conveniently calculated, namely the depth of the detection pipe pressed into the soil body to be detected.
In order to improve the use convenience of the detection device, the frame body is made of transparent materials. The downward sliding distance of the detection tube can be directly obtained through the frame body.
Preferably, the shape of the cavity is matched with the detecting tube, and the length of the cavity along the direction of the detecting tube is 1.2 times greater than the length of the elastic member in the unstressed state, so that the elastic member is prevented from bending when being extruded in the cavity.
The pipe inner diameter and length of the pipe are determined according to the pipe maximum flow rate theorem, and are used for limiting the speed of flowing liquid flowing from the hydraulic cylinder to the storage cylinder.
Pipeline maximum flow rate theorem:
wherein n is queried through a rough coefficient value table, see table 1;
r is hydraulic radius, r=d/4; d represents the pipe diameter of the pipeline, v is the liquid flow rate, ρ is the liquid density, and L is the axial length of the pipeline; p is the force exerted by the press; c represents the Xuezhi coefficient and is obtained by a Manning formula;
the speed v of the device is limited, and the value range of v is 0.15-0.25 cm/s; the relationship between the pipe length and the pipe diameter can be obtained according to the maximum value of v and P, namely the maximum force applied by human, so that the pipe diameter and the axial length of the pipe of the device can be within the calculated result in design.
TABLE 1 coefficient values of pipeline roughness
Preferably, the bottom surface of the frame body is provided with a protrusion for increasing friction force. The bump can be bump or certain line, when increasing frictional force, can use the bottom of framework to polish to the soil body that awaits measuring before using the device to detect, makes its measurement position remain level and smooth.
Preferably, the outer surface of the detection tube is marked with graduations. The scale can obtain the depth of the detection device pressed into the soil body to be detected more simply and rapidly.
The invention also provides a detection method by the speed-limiting type rapid detection device for the intensity of the fluidized soil, which comprises the following steps,
(1) And (3) detection: pressing down the pressing device to enable the detection tube to be pressed into the soil body to be detected, and resetting the pressing device; recording the depth of the soil body before and after the detection pipe is pressed into the soil body;
(2) And (3) data processing: multiplying the depth of the soil body by the elastic coefficient of the elastic component to obtain the force of the detection tube when the soil body is pierced, and dividing the force by the area of the contact cross section of the detection tube and the soil body to be detected to obtain the pressure intensity when the soil body is pierced, namely the compressive strength of the soil body;
(3) Error processing: and detecting the same soil body to be detected for a plurality of times, and taking an average value of detection results.
The principle of the invention: according to the invention, the liquid speed limiting device is introduced, and the first pressure lever and the second pressure lever move downwards simultaneously, so that the liquid in the liquid speed limiting device flows to the storage cylinder, and a part of pressure is shared, so that the maximum loading speed of the rod body is limited, and the influence of an operation error on a test result is avoided; the bottom of the detection tube is connected with a detachable lower end tube, so that the lower end tubes with different sizes can be designed according to different soil bodies to be detected, and different lower end tubes can be installed according to actual soil bodies to be detected, so that errors are reduced; when the soil to be measured is softer (such as sandy soil and silt soil), selecting a lower end pipe with a larger cross section; when the soil to be measured is harder (such as hard and dense cohesive soil), a lower end pipe with a larger cross section is selected. Because the spring coefficient of the spring is in a certain range, the device adjusts the cross-sectional area through different earthiness so as to ensure that the spring range is not exceeded, and the obtained data is effective. During detection, recording the depth of the soil body before and after the detection pipe is pressed into the soil body; multiplying the depth of the soil body by the elastic coefficient of the elastic component to obtain the force of the detection tube when the soil body is pierced, and dividing the force by the area of the contact cross section of the detection tube and the soil body to be detected to obtain the pressure intensity when the soil body is pierced, namely the compressive strength of the soil body; and then detecting for multiple times to average value, thereby further reducing error.
The beneficial effects are that:
(1) The detection device provided by the invention is simple to operate, and the compressive strength of the soil body can be read only through pressing operation;
(2) The detection device provided by the invention can realize in-situ field measurement, can be directly used on a construction site, has little influence on the construction site, and reduces errors possibly caused by a sampling process;
(3) The detection result obtained by using the detection device is reliable, and the liquid speed limiting device is introduced in the use process of the device, so that the maximum loading speed of the rod body of the pressing device can be limited, and the influence of an operation error on the test result is avoided;
(4) The detection device and the corresponding detection method thereof provided by the invention have the advantages of simplicity in operation, in-situ measurement, reliable results and the like, and are suitable for popularization and application in the field of unconfined compressive strength detection.
Drawings
FIG. 1 is a schematic diagram of a detection device;
FIG. 2 is a schematic cross-sectional view of a liquid rate limiting device;
FIG. 3 is a schematic view of a frame and a press bar;
fig. 4 is a perspective view of the frame;
FIG. 5 is a perspective view of a first compression bar;
FIG. 6 is a schematic view of a graduated sense tube;
FIG. 7 is a schematic diagram of a test device pressing process;
fig. 8 is a schematic view of a detection device penetrating into a soil body to be detected.
Detailed Description
As shown in fig. 1 to 6, the rapid detection device for the intensity of the speed-limiting fluidized soil comprises a frame body 1, a pressing device 3 penetrating through the top of the frame body 1, and a liquid speed-limiting device 2 in the frame body 1; the frame body 1 is hollow cylinder-shaped, transparent material, and its top is equipped with upper hole 12, and the bottom is equipped with down hole 13, and upper hole 12 supplies press device 3 to pass, and down hole 13 supplies detection tube 5 to pass, and the inside base 14 that supplies liquid overspeed limiting device 2 to place that is equipped with of frame body 1. The bottom surface of the frame 1 is provided with a friction-increasing protrusion 11. The bump 11 can be bump or certain line, when increasing frictional force, can use the bottom of framework to polish to the soil body that awaits measuring before using the device to detect, makes its measurement position remain level.
The pressing device 3 comprises a first pressing rod positioned at the center and four second pressing rods 21 uniformly arranged along the circumferential direction of the first pressing rod, the second pressing rods 21 are all arranged in parallel with the first pressing rod, a cavity 31 capable of accommodating a spring and part of a detection tube is arranged at the center of the bottom of the first pressing rod, the shape of the cavity 31 is matched with the detection tube 5, the height of the cavity 31 is 1.2 times greater than the length of the spring in an unstressed state, the spring is ensured to be inside the cavity 31, the bending phenomenon can not occur during extrusion, and the two ends of the spring are fixedly connected with the top of the cavity 31 and the top of the detection tube 5 respectively. The outer surface of the detection tube 5 is marked with graduations.
As shown in fig. 2, the liquid speed limiting device 2 comprises four groups of cylinders, each group of cylinders comprises a hydraulic cylinder 24 and a storage cylinder 25, pistons 22 are arranged in the hydraulic cylinders 24 and the storage cylinders 25 and respectively correspond to a first piston and a second piston, the pistons 22 are made of rubber and are provided with sealing rings, the first piston is fixedly connected with the second compression rod 21, pure water is filled in the hydraulic cylinders 24, a pipeline 26 connected with the bottom of the storage cylinders 25 is arranged at the bottom of the hydraulic cylinders 24, and the pressing device 3 drives the pistons 22 to move up and down so that water flows back and forth between the hydraulic cylinders 24 and the storage cylinders 25. The pipe inner diameter and length of the pipe 26 are determined according to the pipe maximum flow rate theorem to limit the rate at which the flowing fluid flows from the hydraulic cylinder to the reservoir cylinder.
Pipeline maximum flow rate theorem:
(n is queried through a coarse coefficient n-value table)
Wherein R is hydraulic radius, r=d/4; d represents the inside diameter of the tube 26, v is the liquid flow rate, ρ is the liquid density, and L is the axial length of the tube 26; p is the force exerted by the press; c represents a thank you coefficient; the speed v of the device is limited, and the value range of v is 0.15-0.25 cm/s; the relationship between the length of the pipe 26 and the inner diameter of the pipe 26 can be obtained by the maximum value of v and the maximum force P, i.e., the maximum force applied by the person, so that the pipe diameter and the axial length of the pipe 26 of the present device are only required to be within the above calculation results when designing.
As shown in fig. 6, the bottom of the detection tube 5 is connected with a lower end tube 52, and the lower end tube 52 is connected with the bottom of the detection tube 5 through threads. When in use, the lower end pipes 52 with different sizes can be designed according to different soil bodies to be tested, and different lower end pipes 52 are installed according to actual soil bodies to be tested so as to reduce errors; when in use, the corresponding lower end pipe 52 can be replaced according to different soil bodies, the pressure area of the bottom and the design requirements. Meanwhile, the sliding ring 53 which can slide up and down along the detecting tube 5 and is positioned below the first compression bar is sleeved on the detecting tube 5, so that the depth of the soil body to be detected before and after the soil body is pressed in can be conveniently read and recorded, and the sliding ring 53 is a sliding hoop and hoops on the detecting tube 5. Before the pressing device 3 is pressed down, the position of the sliding ring 53 is recorded; after the pressing device 3 is pressed down, the first pressing rod moves downwards, so that the sliding ring 53 is driven to slide downwards on the detection tube 5, and the position of the sliding ring 53 is recorded again; the sliding distance of the sliding ring 53 can be conveniently calculated, namely the depth of the detection pipe 5 pressed into the soil body to be detected.
The method for detecting the unconfined compressive strength by using the rapid speed-limiting type fluidized soil strength detection device comprises the following steps,
(1) Leveling: holding a frame body 1 of the detection device by hands, polishing the soil body to be detected by using the salient points at the bottom of the frame body 1, and keeping the measurement position flat;
(2) Selecting a lower end tube 52: selecting a proper lower end pipe 52 according to the design strength and the maximum particle size of the measured soil mass;
(3) Zeroing: adjusting the sliding ring 53 to the zero point position of the scale, as indicated by the sliding ring 53 position in fig. 1, and confirming whether the pressing device 3 has reached the uppermost end;
(4) Pressing: as shown in fig. 7 and 8, the detection device is placed on the surface of a flat soil body to be detected, the pressing device 3 is pressed with force, and the detection tube 5 with scales is pressed into the soil body to be detected; at this time, the first compression bar and the second compression bar 21 move downwards simultaneously, the liquid in the liquid speed limiting device 2 flows to the storage cylinder 25 to share a part of pressure, and the damage of the instrument is prevented, so that the maximum loading speed of the rod body of the pressing device 3 can be limited in the use process, and the influence of an operation error on a test result is avoided;
(5) Reading: reading and recording the position of the sliding ring 53 on the graduated scale of the detection tube 5;
(6) And (3) data processing: according to the read size, multiplying the elasticity coefficient of the spring 4 to obtain the force of the detection tube 5 when the soil to be detected is punctured, and dividing the force by the cross section area of the lower end tube 52 of the detection tube 5 to obtain the pressure of the soil when the soil is punctured, namely the compressive strength of the soil;
(7) And (3) reduction: the sliding ring 53 is adjusted to the zero position of the scale, and the pressing device 3 is moved to the uppermost end; at this time, the second pressure lever 21 moves upward while the piston in the hydraulic cylinder 24 moves upward, the piston in the reservoir cylinder moves downward, and the liquid in the reservoir cylinder 25 flows to the hydraulic cylinder 24;
(8) And (3) error adjustment: the same soil body to be measured is repeatedly measured, the measuring times are not lower than 6 times, and the final strength value is determined through an average value so as to reduce test errors.

Claims (6)

1. The utility model provides a speed-limiting type quick detection device of fluidization soil intensity, includes framework (1), its characterized in that: the device also comprises a pressing device (3) penetrating through the top of the frame body (1), and a liquid speed limiting device (2) in the frame body (1); the frame body (1) is made of transparent materials; the pressing device comprises a first pressing rod and a plurality of second pressing rods (21) which are arranged along the circumference and parallel to the first pressing rod, wherein a cavity (31) for accommodating an elastic member and part of a detection tube (5) is formed in the bottom of the first pressing rod, the shape of the cavity (31) is matched with that of the detection tube (5), two ends of the elastic member are fixedly connected with the top of the cavity (31) and the top of the detection tube (5) respectively, a hole (13) through which the detection tube (5) can pass is formed in the bottom of the frame body (1), and a sliding ring (53) which can slide up and down along the detection tube (5) and is positioned below the first pressing rod is sleeved on the detection tube (5); the liquid speed limiting device (2) comprises hydraulic cylinders (24) and storage cylinders (25) which are the same in number as the second compression rods (21), pistons (22) are respectively arranged in the hydraulic cylinders (24) and the storage cylinders (25), the first pistons and the second pistons are respectively and correspondingly arranged, the first pistons are fixedly connected with the second compression rods (21), liquid is filled in the hydraulic cylinders (24), a pipeline (26) connected with the bottoms of the storage cylinders (25) is arranged at the bottoms of the hydraulic cylinders, and the pressing device (3) drives the first pistons to move up and down to enable the liquid (23) to flow back and forth between the hydraulic cylinders (24) and the storage cylinders (25).
2. The rapid detection device for the intensity of speed-limiting fluidized soil according to claim 1, wherein: the bottom of the detection tube (5) is connected with a lower end tube (52), and the lower end tube (52) is detachable.
3. The rapid detection device for the intensity of speed-limiting fluidized soil according to claim 1, wherein: the pipe inner diameter and length of the pipe (26) are determined according to the pipe maximum flow rate theorem.
4. The rapid detection device for the intensity of speed-limiting fluidized soil according to claim 1, wherein: the bottom surface of the frame body (1) is provided with a bulge (11) for increasing friction force.
5. The rapid detection device for the intensity of speed-limiting fluidized soil according to claim 1, wherein: the outer surface of the detection tube (5) is marked with scales.
6. A detection method using the speed-limiting type fluidized soil strength rapid detection device according to any one of claims 1 to 5, characterized in that: comprises the following steps of the method,
(1) And (3) detection: pressing down the pressing device (3) to enable the detection tube (5) to be pressed into the soil body to be detected, and resetting the pressing device (3); recording the depth of the soil body before and after the detection pipe (5) is pressed into the soil body;
(2) And (3) data processing: multiplying the depth of the soil body by the elastic coefficient of the elastic component (4) to obtain the force when the detection tube (5) pierces the soil body, and dividing the force by the area of the contact cross section of the detection tube (5) and the soil body to be detected to obtain the pressure intensity when the soil body is pierced, namely the compressive strength of the soil body;
(3) And detecting the soil body to be detected for multiple times, and obtaining an average value.
CN201910432557.5A 2019-05-22 2019-05-22 Speed-limiting type quick detection device and detection method for strength of fluidized soil Active CN110082211B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201910432557.5A CN110082211B (en) 2019-05-22 2019-05-22 Speed-limiting type quick detection device and detection method for strength of fluidized soil
LU101714A LU101714B1 (en) 2019-05-22 2020-03-30 Speed limiting type flowable quick soil strength detection apparatus and detection method

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