LU101714B1 - Speed limiting type flowable quick soil strength detection apparatus and detection method - Google Patents
Speed limiting type flowable quick soil strength detection apparatus and detection method Download PDFInfo
- Publication number
- LU101714B1 LU101714B1 LU101714A LU101714A LU101714B1 LU 101714 B1 LU101714 B1 LU 101714B1 LU 101714 A LU101714 A LU 101714A LU 101714 A LU101714 A LU 101714A LU 101714 B1 LU101714 B1 LU 101714B1
- Authority
- LU
- Luxembourg
- Prior art keywords
- soil
- detection
- speed limiting
- tube
- framework
- Prior art date
Links
Classifications
-
- 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
Landscapes
- 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 disclosure discloses a speed limiting type flowable quick soil strength detection apparatus and a detection method. The detection apparatus includes a framework, a pressing apparatus passing through a top of the framework, and a liquid speed limiting apparatus in the framework. The detection method includes the steps of: pressing down the pressing apparatus so that a detection tube is pressed into to-be-detected soil, and then resetting the pressing apparatus; recording a soil depth entered before and after the detection tube is pressed into the soil; and multiplying the soil depth by an elastic coefficient of an elastic component to obtain a force when the detection tube pierces the soil, and then dividing an area of a cross section where the detection tube contacts with the soil, to obtain a pressure when the soil is pierced, that is, a compressive strength of the soil. The disclosure is simple in structure, may read a compressive strength of soil just by a pressing operation, may implement site measurement, and has a reliable data result and a small error.
Description
APPARATUS AND DETECTION METHOD Technical Field
[0001] The disclosure relates to a detection apparatus for a civil engineering material and a detection method, and in particular to a speed limiting type flowable quick soil strength detection apparatus and detection method.
Background
[0002] During engineering construction, an unconfined compressive strength refers to an ultimate strength of a solidified soil sample to resist an axial stress in a condition without a lateral pressure. It is the most fundamental mechanical performance index of the solidified soil, and one of important indicators to evaluate a curing effect of cement or other cementing materials to the soil. At present, two main methods for detecting the unconfined compressive strength of the soil have been proposed, one being to sample at a site and then make a detection in a laboratory, and the other being to blend according to a site proportion, cure and measure in the laboratory. However, the two methods both have a certain problems: the site sampling method has the defects that: m the site that has been constructed will be affected; and @) the sample may be disturbed by the sampling or subsequent soil cutting process so that a test result is distorted. The laboratory preparation method has the defects that: m the blending process of a material in the laboratory is different from that at the site to cause distortion of a measurement result possibly; and @) the curing condition of the laboratory is different from the site, and this is also a case for the development trend of a strength of the solidified soil, which may result in that the measurement result is distorted.
[0003] The Chinese Patent Application No. "CN 201811590722" discloses a "semiquantitative unconfined compressive strength tester”. The provided semiquantitative unconfined compressive strength tester has the following defects: m the operation is troublesome: the sample needs to be taken at the site and then is measured in the laboratory; and @) the operation is not convenient enough: multiple types of weights are used during test and the operation is troublesome.
Summary
[0004] Objectives: an objective of the disclosure is to provide a speed limiting type flowable quick soil strength detection apparatus, and another objective is to provide a detection method using the speed limiting type flowable quick soil strength detection apparatus. The detection apparatus is simple in operation and convenient in use, can measure to-be-detected soil in situ, and has a reliable result, a small error, and a small influence on a construction site.
[0005] Technical solutions: the disclosure provides a speed limiting type flowable quick soil strength detection apparatus, including a framework, and further including a pressing apparatus passing through a top of the framework, and a liquid speed limiting apparatus in the framework; the pressing apparatus includes a first pressure rod, and a plurality of second pressure rods arranged along a periphery of the first pressure rod and in parallel to the first pressure rod; a cavity for accommodating an elastic component and a part of detection tubes is provided on a bottom of the first pressure rod; two ends of the elastic component are respectively and fixedly connected to a top of the cavity and a top of the detection tube; a hole capable of passing through the detection tube is provided on a bottom of the framework; the liquid speed limiting apparatus includes a hydraulic cylinder and a storage cylinder that have the same number with the second pressure rod; a first piston and a second piston are respectively disposed in the hydraulic cylinder and the storage cylinder; the first piston is fixedly connected to the second pressure rod; the hydraulic cylinder is filled with a liquid, and provided with, on a bottom, a tubing connected to a bottom of the storage cylinder; and the pressing apparatus drives the piston to move up and down so that the liquid flows back and forth between the hydraulic cylinder and the storage cylinder.
[0006] The framework is a hollow cylinder or prism. A vertical strip gap corresponding to the detection tube may be provided on the framework, for the ease of observation. The elastic component is made of an elastic material having a known elastic coefficient, and may be a spring or a component made of other elastic materials. The liquid filled in the speed limiting apparatus may be common water, saline water and other solutions, in which the saline water has a density slightly greater than pure water and has a better speed limiting effect to the apparatus.
[0007] Further, a bottom of the detection tube is connected to a lower end tube, and the lower end tube is detachable. The lower end tube of a different size may be designed according to different to-be-detected soil, and the different lower end tube is installed according to actual to-be-detected soil, all of which are to reduce an error. When the to-be-detected soil is soft soil (for example, sand and slit}, the lower end tube having a large cross section is selected. When the to-be-detected soil is hard soil (for example, hard and compact cohesive soil), the lower end tube having the large cross section is selected. As the elastic coefficient of the spring is within a certain range, the apparatus adjusts a cross section by means of different soil, so as not to exceed a measuring range of the spring and obtain effective data.
[0008] In order to conveniently read and record a soil depth entered in the to-be-detected soil before and after the detection tube is pressed into the soil, the detection tube sleeves a slip ring capable of sliding up and down along the detection tube and located under the first pressure rod. Before the pressing apparatus is pressed down, a position of the slip ring is recorded. After the pressing apparatus is pressed down, the first pressure rod moves downward, so that the slip ring is driven to slide downward on the detection tube, and the position of the slip ring is recorded again. Therefore, a sliding distance of the slip ring, that is, the depth that the detection tube is pressed into the to-be-detected soil, may be calculated conveniently.
[0009] In order to improve the convenience of the detection apparatus in use, the framework is made of a transparent material. A distance that the detection tube slides downward may be obtained directly via the framework.
[0010] Preferably, the cavity is matched with the detection tube in shape; and a length of the cavity along a direction of the detection tube is 1.2 times greater than a length of the elastic component in an unstressed state, so as to guarantee that the elastic component does not occur a bending phenomenon when extruded in the cavity.
[0011] An inner diameter and a length of the tubing are determined according to a maximum flow velocity theorem of the tubing, so as to limit a velocity of the flowing liquid to flow from the hydraulic cylinder to the storage cylinder.
[0012] Maximum flow velocity theorem of the tubing: [FR p=C/RF= A pel.
; 4 \ 7 C= KR , Where the n is queried by a roughness coefficient value table, and referred to table 1; and
[0013] the R is a hydraulic radius, R=d/4, the d denotes a diameter of the tubing, the v is a flow velocity of the liquid, the p is a density of the liquid, the L is an axial length of the tubing, the P is a pressing applied force, and the C denotes a Chezy coefficient and is obtained by means of a manning formula.
[0014] As the velocity v of the apparatus is defined and has a range of 0.15-0.25 cm/s, a relationship between the length of the tubing and the diameter of the tubing may be obtained according to a maximum force of the v and the P (a maximum force applied artificially). Therefore, the diameter and the axial length of the tubing of the apparatus may be acceptable as long as within the above calculation result in design.
[0015] Table 1 Roughness coefficient value of tubing Absolute roughness Serial No. Category mm Seamless yellow steel tube, 1 0.01-0.05 steel tube and lead tube New seamless steel tube or 2 0.1-0.2 galvanized iron tube Metal tube Slightly corrosive seamless
0.2-0.3 steel tube Significantly corrosive 5 0.5 or above seamless steel tube | 6 | Old cast iron tube 0.85 or above Steel plate manufactured tube 8 Clean glass tube 0.0015-0.01 | 8 | Nonmetal Rubber hose 0.01-0.03 Argil drainage tube 0.45-6.0 owe amr
[0016] Preferably, a bump for increasing a friction force is disposed on a bottom surface of the framework. The bump may be a salient point or a certain line, so that while the friction force is increased, the bottom of the framework may be used to polish the to-be-detected soil to keep a measurement position flat before the use of the apparatus for detection.
5 [0017] Preferably, a scale is marked on an outer surface of the detection tube. With the scale, the depth that the detection apparatus is pressed into the to-be-detected soil may be obtained more simply and conveniently.
[0018] The disclosure further provides a detection method using the speed limiting type flowable quick soil strength detection apparatus, including the following steps:
[0019] (1) detecting: pressing down a pressing apparatus so that a detection tube is pressed into to-be-detected soil, and then resetting the pressing apparatus; and recording a soil depth entered before and after the detection tube is pressed into the soil;
[0020] (2) data processing: multiplying the soil depth by an elastic coefficient of an elastic component to obtain a force when the detection tube pierces the soil, and then dividing an area of a cross section where the detection tube contacts with the soil, to obtain a pressure when the soil is pierced, that is, a compressive strength of the soil; and
[0021] (3) error processing: detecting the same to-be-detected soil for multiple times, and taking an average value for detection results.
[0022] Principles: according to the disclosure, with the introduction of a liquid speed limiting apparatus, by means of simultaneous and downward movement of a first pressure rod and a second pressure rod, a liquid in the liquid speed limiting apparatus flows to a storage cylinder to undertake a part of a pressure, thus limiting a maximum loading velocity of a rod body, and preventing an influence of an operation error to a test result. A detachable lower end tube is connected to a bottom of a detection tube, the lower end tube of a different size may be designed according to different to-be-detected soil, and the different lower end tube is installed according to actual to-be-detected soil, all of which are to reduce an error. When the to-be-detected soil is soft soil (for example, sand and slit), the lower end tube having a large cross section is selected. When the to-be-detected soil is hard soil (for example, hard and compact cohesive soil), the lower end tube having the large cross section is selected. As an elastic coefficient of a spring is within a certain range, the apparatus adjusts a cross section by means of different soil, so as not to exceed a measuring range of the spring and obtain effective data. During detection, a soil depth entered before and after the detection tube is pressed into the soil is recorded; the soil depth is multiplied by an elastic coefficient of an elastic component to obtain a force when the detection tube pierces the soil, and then divides an area of a cross section where the detection tube contacts with the soil, to obtain a pressure when the soil is pierced, that is, a compressive strength of the soil; and the detection is performed for multiple times, and an average value is taken, thus further reducing the error.
[0023] The disclosure has the following beneficial effects:
[0024] (1) The detection apparatus provided by the disclosure is simple in operation, and may read a compressive strength of soil just by a pressing operation.
[0025] (2) The detection apparatus provided by the disclosure may implement site measurement in situ, may be directly used at a construction site with a tiny influence on the construction site, and reduces an error possibly caused in a sampling process.
[0026] (3) A detection result obtained by using the detection apparatus is reliable; and in use, with the instruction of a liquid speed limiting apparatus, the apparatus can limit a maximum loading velocity of a rod body of a pressing apparatus to prevent an influence of an operation error on the test result.
[0027] (4) The detection apparatus and the corresponding detection method provided by the disclosure have the advantages of simple operation, in-situ measurement, reliable result and the like, and are applied to promotion and application in the field of unconfined compressive strength detection.
Brief Description of Figures
[0028] FIG. 1 is a schematic diagram of a detection apparatus.
[0029] FIG. 2 is a cross-sectional schematic diagram of a liquid speed limiting apparatus.
[0030] FIG. 3 is a schematic diagram of a framework and a pressure rod.
[0031] FIG. 4 is a stereoscopic diagram of a framework.
[0032] FIG. 5 is a stereoscopic diagram of a first pressure rod.
[0033] FIG. 6 is a structural schematic diagram of a detection tube having a scale.
[0034] FIG. 7 is a schematic diagram of a pressing process of a detection apparatus.
[0035] FIG. 8 is a schematic diagram showing that a detection apparatus pierces to-be-detected soil. Detailed Description
[0036] As shown in FIGS. 1-6, a speed limiting type flowable quick soil strength detection apparatus includes a framework 1, and further includes a pressing apparatus 3 passing through a top of the framework 1, and a liquid speed limiting apparatus 2 in the framework 1. The framework 1 is of a hollow cylindrical shape, made of a transparent material, and provided with an upper hole 12 on the top and a lower hole 13 on a bottom; the upper hole 12 is available to pass through the pressing apparatus 3, and the lower hole 13 is available to pass through a detection tube 5. A pedestal 14 for placing the liquid speed limiting apparatus 2 is disposed in the framework 1. A bump 11 for increasing a friction force is disposed on a bottom surface of the framework 1. The bump 11 may be a salient point or a certain line, so that while the friction force is increased, the bottom of the framework may be used to polish the to-be-detected soil to keep a measurement position flat before the use of the apparatus for detection.
[0037] The pressing apparatus 3 includes a first pressure rod located in the center, and four second pressure rods 21 arranged uniformly along a periphery of the first pressure rod. The second pressure rods 21 are all arranged in parallel to the first pressure rod. A cavity 31 capable of accommodating a spring and a part of detection tubes forms at a central position of a bottom of the first pressure rod. The cavity 31 is matched with the detection tube 5 in shape. A height of the cavity 31 is 1.2 times greater than a length of the spring in an unstressed state, so that the spring does not occur a bending phenomenon when extruded in the cavity 31. Two ends of the spring are respectively and fixedly connected to a top of the cavity 31 and a top of the detection tube 5. A scale is marked on an outer surface of the detection tube 5.
[0038] As shown in FIG. 2, the liquid speed limiting apparatus 2 includes four sets of cylinder bodies; each set of cylinder body includes a hydraulic cylinder 24 and a storage cylinder 25. A piston 22 is disposed in the hydraulic cylinder 24 and the storage cylinder 25, and is a first piston and a second piston correspondingly. The piston 22 is made of rubber and provided with a seal ring. The first piston is fixedly connected to the second pressure rod 21. The hydraulic cylinder 24 is filled with pure water, and provided, on a bottom, with a tubing 26 connected to a bottom of the storage cylinder 25. The pressing apparatus 3 drives the piston 22 to move up and down, so that the water flows back and forth between the hydraulic cylinder 24 and the storage cylinder 25. An inner diameter and a length of the tubing 26 are determined according to a maximum flow velocity theorem of the tubing, so as to limit a velocity of the flowing liquid to flow from the hydraulic cylinder to the storage cylinder.
[0039] Maximum flow velocity theorem of the tubing: 1 4 i. =" ps (the nis queried by a roughness coefficient n value table) A 15 [0040] Where, the R is a hydraulic radius, R=d/4, the d denotes a diameter of the tubing 26, the v is a flow velocity of the liquid, the p is a density of the liquid, the Lis an axial length of the tubing 26, the P is a pressing applied force, and the C denotes a Chezy coefficient. As the velocity v of the apparatus is defined and has a range of 0.15-0.25 cm/s, a relationship between the length of the tubing 26 and the diameter of the tubing 26 may be obtained according to a maximum force of the v and the P (a maximum force applied artificially). Therefore, the diameter and the axial length of the tubing 26 of the apparatus may be acceptable as long as within the above calculation result in design.
[0041] As shown in FIG. 6, a bottom of the detection tube 5 is connected to a lower end tube 52; and the lower end tube 52 is in threaded connection with the bottom of the detection tube
5.1n use, the lower end tube 52 of a different size may be designed according to different to- be-detected soil, and the different lower end tube 52 is installed according to actual to-be- detected soil, all of which are to reduce an error. The lower end tube 52 may be replaced correspondingly in terms of different soil, a bottom stressed area and a design requirement in use. Meanwhile, the detection tube 5 sleeves a slip ring 53 capable of sliding up and down along the detection tube 5 and located under the first pressure rod, so as to conveniently read and record a soil depth entered in the to-be-detected soil before and after the detection tube 5 is pressed into the soil. The slip ring 53 is a slip hoop ring hooped to the detection tube 5. Before the pressing apparatus 3 is pressed down, a position of the slip ring 53 is recorded. After the pressing apparatus 3 is pressed down, the first pressure rod moves downward, so that the slip ring 53 is driven to slide downward on the detection tube 5, and the position of the slip ring 53 is recorded again. Therefore, a sliding distance of the slip ring 53, that is, the depth that the detection tube 5 is pressed into the to-be-detected soil, may be calculated conveniently.
[0042] A method for detecting an unconfined compressive strength by using the speed limiting type flowable quick soil strength detection apparatus includes the following steps.
[0043] (1) Leveling: a framework 1 of the detection apparatus is held with a hand, and a salient point on a bottom of the framework 1 is used to polish to-be-detected soil to keep a measurement position flat.
[0044] (2) Selection of lower end tube 52: an appropriate lower end tube 52 is selected according to a design strength and a maximum particle size of the measured soil.
[0045] (3) Zero returning: a slip ring 53 is adjusted to a zero-point position of a scale, as indicated by a position of the slip ring 53 in FIG. 1, and whether the pressing apparatus 3 reaches to an uppermost end is confirmed.
[0046] (4) Pressing: as shown in FIG. 7 and FIG. 8, the detection apparatus is placed on a surface of the flat to-be-detected soil; and the pressing apparatus 3 is pressed vigorously to press a detection tube 5 having a scale into the to-be-detected soil. By this time, a first pressure rod and a second pressure rod 21 move downward, and a liquid in the liquid speed limiting apparatus 2 flows to a storage cylinder 25 to undertake a part of a pressure, thus preventing a damage of an instrument. As a result, a maximum loading velocity of a rod body of the pressing apparatus 3 can be limited in use, to prevent an influence of an operation error on a test result.
[0047] (5) Reading: a position of the slip ring 53 on the scale of the detection tube 5 is read and recorded.
[0048] (6) Data processing: the read size is multiplied by an elastic coefficient of a spring 4 to obtain a force when the detection tube 5 pierces the to-be-detected soil, and then divides an area of a cross section of the lower end tube 52 of the detection tube 5, to obtain a pressure when the soil is pierced, that is, a compressive strength of the soil.
[0049] (7) Restoration: the slip ring 53 is adjusted to the zero-point position of the scale, and the pressing apparatus 3 moves to the uppermost end. By this time, while the second pressure rod 21 moves upward, a piston in a hydraulic cylinder 24 moves upward, and a piston in the storage cylinder moves downward, so that the liquid in the storage cylinder 25 flows to the hydraulic cylinder 24.
[0050] (8) Error adjustment: a same block of the to-be-detected soil is measured repeatedly for not smaller than 6 times, and a final strength value should be determined by an average value to reduce a test error.
Claims (9)
1.A speed limiting type flowable quick soil strength detection apparatus, comprising a framework (1), and further comprising a pressing apparatus (3) passing through a top of the framework (1), and a liquid speed limiting apparatus (2) in the framework (1), wherein the pressing apparatus comprises a first pressure rod, and a plurality of second pressure rods (21) arranged along a periphery of the first pressure rod and in parallel to the first pressure rod; a cavity (31) for accommodating an elastic component and a part of detection tubes (5) is provided on a bottom of the first pressure rod; two ends of the elastic component are respectively and fixedly connected to a top of the cavity (31) and a top of the detection tube (5); a hole (13) capable of passing through the detection tube (5) is provided on a bottom of the framework (1); the liquid speed limiting apparatus (2) comprises a hydraulic cylinder (24) and a storage cylinder (25) that have the same number with the second pressure rod (21); a first piston and a second piston are respectively disposed in the hydraulic cylinder (24) and the storage cylinder (25); the first piston is fixedly connected to the second pressure rod (21); the hydraulic cylinder (24) is filled with a liquid, and provided with, on a bottom, a tubing (26) connected to a bottom of the storage cylinder (25); and the pressing apparatus (3) drives the piston (22) to move up and down so that the liquid (23) flows back and forth between the hydraulic cylinder (24) and the storage cylinder (25).
2. The speed limiting type flowable quick soil strength detection apparatus according to claim 1, wherein a bottom of the detection tube (5) is connected to a lower end tube (52), and the lower end tube (52) is detachable.
3. The speed limiting type flowable quick soil strength detection apparatus according to claim 1, wherein the detection tube (5) sleeves a slip ring (53) capable of sliding up and down along the detection rube (5) and located under the first pressure rod.
4. The speed limiting type flowable quick soil strength detection apparatus according to claim 1, wherein the framework (1) is made of a transparent material.
5. The speed limiting type flowable quick soil strength detection apparatus according to claim 1, wherein the cavity (31) is matched with the detection tube (5) in shape.
6. The speed limiting type flowable quick soil strength detection apparatus according to claim 1, wherein an inner diameter and a length of the tubing (26) are determined according to a maximum flow velocity theorem of the tubing.
7. The speed limiting type flowable quick soil strength detection apparatus according to claim 1, wherein a bump (11) for increasing a friction force is disposed on a bottom surface of the framework (1).
8. The speed limiting type flowable quick soil strength detection apparatus according to claim 1, wherein a scale is marked on an outer surface of the detection tube (5).
9. A detection method using the speed limiting type flowable quick soil strength detection apparatus according to any one of claims 1 to 8, comprising the following steps: (1) detecting: pressing down a pressing apparatus (3) so that a detection tube (5) is pressed into to-be-detected soil, and then resetting the pressing apparatus (3); and recording a soil depth entered before and after the detection tube (5) is pressed into the soil; (2) data processing: multiplying the soil depth by an elastic coefficient of an elastic component (4) to obtain a force when the detection tube (5) pierces the soil, and then dividing an area of a cross section where the detection tube (5) contacts with the soil, to obtain a pressure when the soil is pierced, that is, a compressive strength of the soil; and (3) detecting the to-be-detected soil for multiple times, and taking an average value.
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| LU101714A1 LU101714A1 (en) | 2020-11-23 |
| LU101714B1 true LU101714B1 (en) | 2021-05-12 |
Family
ID=67421440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU101714A LU101714B1 (en) | 2019-05-22 | 2020-03-30 | Speed limiting type flowable quick soil strength detection apparatus and detection method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110082211B (en) |
| LU (1) | LU101714B1 (en) |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4052903A (en) * | 1976-12-06 | 1977-10-11 | Thor Instrument Company, Inc. | Pressure sensor |
| US4719809A (en) * | 1985-12-31 | 1988-01-19 | Jr Johanson, Inc. | Apparatus and test method for determining flow or no flow conditions of bulk solids |
| US4825700A (en) * | 1988-06-15 | 1989-05-02 | Regents Of The University Of Minnesota | Bi-axial geomaterial test system |
| US20110313685A1 (en) * | 2008-12-31 | 2011-12-22 | Koen Geirnaert | System and method for sand detection |
| CN203069439U (en) * | 2013-01-25 | 2013-07-17 | 安徽合力股份有限公司 | Test bed used for fatigue strength test of portal frame of forklift truck |
| CN204903300U (en) * | 2015-08-07 | 2015-12-23 | 西南交通大学 | Testing arrangement is cuted in drilling of soil body normal position |
| CN105133563B (en) * | 2015-08-25 | 2017-06-20 | 盐城工学院 | A kind of home position testing method and device of quick measure deep soil shearing strength |
| CN205719738U (en) * | 2016-05-07 | 2016-11-23 | 王庆表 | A kind of novel penetration type concrete strength inspection device |
| CN106769449B (en) * | 2016-11-28 | 2020-04-07 | 广州市建筑材料工业研究所有限公司 | Method for rapidly detecting strength of on-site autoclaved aerated concrete block |
| CN109208565B (en) * | 2017-06-29 | 2023-12-08 | 中国科学院西北生态环境资源研究院 | Multi-parameter rapid detection device and detection method for shallow surface frozen soil |
| CN108007798B (en) * | 2017-10-24 | 2020-03-31 | 湖南大学 | Penetration type soil body strength and wave velocity combined test device and use method thereof |
| CN107966316B (en) * | 2017-11-10 | 2019-10-15 | 东南大学 | The hydraulic fixed sampler of one kind and its sampling method |
| CN108489823A (en) * | 2018-03-30 | 2018-09-04 | 青岛理工大学 | Strain control type low-temperature unconfined compression instrument |
| CN109371868A (en) * | 2018-11-27 | 2019-02-22 | 河北科创商务信息咨询有限公司 | A kind of non-newtonian fluid limiter of speed and its limited speed belt |
| CN109490092A (en) * | 2018-12-20 | 2019-03-19 | 四川正升环保科技有限公司 | A kind of sxemiquantitative unconfined compressive strength tester |
| CN210108851U (en) * | 2019-05-22 | 2020-02-21 | 江苏科技大学 | Speed-limiting type rapid detection device for intensity of fluidized soil |
-
2019
- 2019-05-22 CN CN201910432557.5A patent/CN110082211B/en active Active
-
2020
- 2020-03-30 LU LU101714A patent/LU101714B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| LU101714A1 (en) | 2020-11-23 |
| CN110082211A (en) | 2019-08-02 |
| CN110082211B (en) | 2024-01-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105588796B (en) | A kind of device of accurate quick measure soil permeability coefficient | |
| Aiban et al. | Evaluation of the flow pump and constant head techniques for permeability measurements | |
| CN208704614U (en) | A kind of water pipeline inner diameter measuring device | |
| CN205581106U (en) | A device for testing self -compaction microdilatancy steel pipe concrete expansion rate | |
| CN208224038U (en) | A kind of experimental provision for surveying permeability during the rock failure mechanism of rock in real time with constant flow | |
| CN108414343A (en) | A method of measuring sample rubber-oil-pipe sensor amount in coarse-grained soil Large-scale Triaxial Experiments | |
| CN208223381U (en) | Swell increment analyzer under a kind of high-speed rail foundation expansion soil various factors coupling | |
| CN212622092U (en) | Simple testing device for accurately measuring water and gas radial permeability coefficient of concrete | |
| CN106546491B (en) | Detachable rock mass lateral load and water pressure coupling auxiliary test device | |
| CN106225654A (en) | A kind of concrete surface roughness measuring device and measuring method thereof | |
| LU101714B1 (en) | Speed limiting type flowable quick soil strength detection apparatus and detection method | |
| CN205981916U (en) | Controllable rock lateral restraint expansion rate survey device of side direction confined pressure | |
| Yin | A double cell triaxial system for continuous measurement of volume changes of an unsaturated or saturated soil specimen in triaxial testing | |
| CN107807219B (en) | Rock core hydration expansion analyzer | |
| CN206891901U (en) | Concrete slump test instrument | |
| CN210108851U (en) | Speed-limiting type rapid detection device for intensity of fluidized soil | |
| Hvorslev et al. | Torsion shear apparatus and testing procedures | |
| CN207214970U (en) | A kind of concrete expansion, shrinkage test length measuring instrument | |
| CN208399314U (en) | A kind of rotating interfacial tensimeter image magnification ratio truing tool | |
| CN105466834B (en) | The measurement apparatus and method of compression ratio adjustable type porous media plane permeability | |
| CN207181235U (en) | For measuring the detection device of pipeline closed-water test data | |
| CN110160925B (en) | Geotechnical test pneumatic consolidation permeameter and test monitoring method thereof | |
| CN112798502A (en) | Toughness city is with permeable pavement normal position and sample osmotic coefficient testing arrangement | |
| Boudia et al. | The detailed study on the Development of the Triaxial Equipment in the soil mechanics: A Review | |
| CN105675850A (en) | Test method for researching long-term stability of expansive cement slurry |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Patent granted |
Effective date: 20210512 |
|
| PD | Change of ownership |
Owner name: HANGZHOU JIANGRUN TECHNOLOGY CO., LTD; CN Free format text: FORMER OWNER: JIANGSU UNIVERSITY OF SCIENCE AND TECHNOLOGY Effective date: 20211222 |