CN112985948A - Mounting method, dismounting method and using method of hollow cylindrical sample - Google Patents

Mounting method, dismounting method and using method of hollow cylindrical sample Download PDF

Info

Publication number
CN112985948A
CN112985948A CN202110338434.2A CN202110338434A CN112985948A CN 112985948 A CN112985948 A CN 112985948A CN 202110338434 A CN202110338434 A CN 202110338434A CN 112985948 A CN112985948 A CN 112985948A
Authority
CN
China
Prior art keywords
sample
water
consolidation
outer cylinder
soil sample
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110338434.2A
Other languages
Chinese (zh)
Inventor
滕越
扈萍
马少坤
刘莹
刘宗辉
张西文
雍浩然
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Jinan
Original Assignee
University of Jinan
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by University of Jinan filed Critical University of Jinan
Priority to CN202110338434.2A priority Critical patent/CN112985948A/en
Publication of CN112985948A publication Critical patent/CN112985948A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00Sampling; Preparing specimens for investigation
    • G01N1/28Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

一种空心圆柱试样的安装方法、拆卸方法及使用方法,包括有内筒、固结外筒、透水顶盖和排水底盘;其中,内筒包括有四瓣呈圆弧状设置的内筒组件、固定槽、透水孔;固结外筒包括有两瓣呈半圆状设置的固结外筒组件,固定台,固定孔A;锁紧块,限位槽、限位块;透水顶盖的中心处设置有一通孔;排水底盘整体呈圆盘状,设置有集水孔。本发明的安装与连接多采用榫卯卡扣形式,使得土样更能准确贴近所需标准尺寸;形成密闭性较高的真空仓,便于水、气的排出,对含水量的控制更加准确;且有效降低了拆样时对土样的扰动程度,避免了对土样内、外径进行二次切削,为一次性快速制成具有国际常用标准内、外径的饱和空心圆柱试样提供了可能。An installation method, disassembly method and use method of a hollow cylindrical sample, comprising an inner cylinder, a consolidated outer cylinder, a permeable top cover and a drainage chassis; wherein, the inner cylinder includes an inner cylinder assembly with four petals arranged in an arc shape , fixing groove, water permeable hole; the consolidation outer cylinder includes a consolidation outer cylinder assembly with two semicircular petals, a fixing table, a fixing hole A; a locking block, a limit groove, a limit block; the center of the permeable top cover A through hole is arranged at the base; the drainage chassis is in the shape of a disc as a whole, and a water collecting hole is arranged. The installation and connection of the present invention mostly adopts the form of tenon-and-mortise buckle, so that the soil sample can be more accurately close to the required standard size; a vacuum chamber with high airtightness is formed, which is convenient for the discharge of water and gas, and the control of the water content is more accurate; And effectively reduce the disturbance of the soil sample when disassembling the sample, avoid the secondary cutting of the inner and outer diameters of the soil sample, and provide a one-time rapid production of saturated hollow cylindrical samples with the inner and outer diameters of commonly used international standards. possible.

Description

Mounting method, dismounting method and using method of hollow cylindrical sample
Technical Field
The invention relates to the technical field of rock and soil, in particular to an installation method, a disassembly method and a use method of a hollow cylindrical sample.
Background
Remolded clay is one of the most widely applied soils in geotechnical tests, and has the characteristics of small particle size, low strength, poor permeability, easy disturbance and damage and large stress deformation. The existing preparation methods of remolded clay mainly comprise a compaction method and a slurry consolidation method. The compaction method is that prepared wet soil samples are poured into a compactor, the soil samples are compacted in a layering mode through a heavy hammer, and the samples are taken out and then saturated through air suction. Because the height of the layered compaction layer and the size of the gravity acting are difficult to control manually and accurately, the uniformity of the prepared sample is difficult to ensure, the water content and the density are difficult to control accurately, and the preparation of the sample with higher water content is more difficult.
The slurry consolidation method is classified into a pressure consolidation method and a vacuum consolidation method according to different consolidation powers. The principle of preparing the soil sample by pressurizing and consolidating is simpler, but a sample preparation device is generally heavier, the consolidation time is longer, and large-volume soil blocks are required to be segmented, drilled and cut after the consolidation is finished so as to prepare hollow cylindrical soil samples with standard sizes. The method has the advantages of long integral sample preparation period, large cutting operation difficulty and obvious disturbance to soil sample disturbance, and is not beneficial to qualitative analysis in the hollow cylinder torsional shear test.
The vacuum consolidation method can well discharge water and gas in the soil sample, and particularly has obvious effect on clay with poor permeability. However, the existing sample preparation test equipment has large volume and obvious mud separation phenomenon in sample preparation, and in order to obtain a hollow cylindrical sample meeting the size requirement, secondary cutting is carried out on the inner diameter and the outer diameter of the soil sample, so that the hollow cylindrical sample (particularly the side wall of the soil sample) is easily disturbed to different degrees, and the uniformity of the soil sample in the test is difficult to ensure. When a vacuum consolidation method is adopted for sample preparation, if the vacuum negative pressure is increased for shortening the consolidation time and the loaded stress in the subsequent test is lower than the stress level in the sample preparation, the soil sample in the test is in a hyperconcentration state, thereby generating great influence on the test result.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an installation method, a disassembly method and a use method of a hollow cylindrical sample.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the installation method of the sample preparation device of the hollow cylindrical sample comprises the following steps:
step 1, placing a drainage chassis 4 on a test rack 7, and keeping the drainage chassis 4 horizontal;
step 2, uniformly coating a layer of vacuum sealing grease on the edge of the four-petal inner cylinder assembly 101, aligning and folding the four-petal inner cylinder assembly 101, and inserting the four-petal inner cylinder assembly into an inner cylinder clamping groove 402 of the drainage chassis 4;
step 3, uniformly coating a layer of vacuum sealing grease on the edge of the matched water-permeable top cover 3, and clamping the vacuum sealing grease into a fixing groove 102 at the top end of the inner cylinder assembly 101;
step 4, wetting circular filter paper with the diameter of 60mm, and flatly attaching the circular filter paper to the water-permeable top cover 3; wetting a filter paper strip with the width of 10-12mm, and flatly attaching the filter paper strip to the water permeable hole 103 of the inner cylinder assembly 101; aims to accelerate the drainage of the soil sample and prevent fine particles in the soil from being filtered out; the assembly of the inner cylinder 1 is completed;
step 5, placing the sealing washer 6 into the outer cylinder clamping groove 401 of the drainage chassis 4;
step 6, uniformly coating a layer of vacuum sealing grease on the inner sides of the limiting grooves 205 of the two-petal outer cylinder consolidation component 201, folding the two-petal outer cylinder consolidation component 201, extending bolts into bolt holes of two adjacent locking blocks 204 to fix the two-petal outer cylinder consolidation component 201 into a whole, and completing the assembly of the consolidation outer cylinder 2;
step 7, vertically inserting the assembled consolidation outer cylinder 2 into an outer cylinder clamping groove 401 of the drainage base 4, aligning the fixing hole A203 and the fixing hole B404, adjusting the fixation holes to be completely attached to the drainage base 4, fixing the consolidation outer cylinder 2 on the drainage chassis 4 through bolts, and connecting the consolidation outer cylinder 2 and the drainage chassis 4 through the bolts; and finishing the installation of the sample preparation device of the hollow cylindrical sample.
The use method of the sample preparation device for the hollow cylindrical sample comprises the following steps:
step 1, air-drying a soil sample; spreading the soil sample obtained on site into a thin layer of 0.5-0.8 cm, spreading on clean kraft paper, placing in a shady, dry and ventilated place, and turning over once every 1 hour to accelerate the drying of the soil sample;
step 2, removing impurities from the soil sample; placing the air-dried soil sample on a rubber plate, and grinding the soil sample by using wood, wherein the gravel cannot be crushed in the grinding process; sieving the rolled soil sample by a sieve with 2mm holes to remove larger impurities in the soil sample;
step 3, drying the soil sample; flatly spreading the soil sample without impurities into a drying box, drying at 105-110 ℃, weighing the soil sample once every two hours, and when the drying time is not less than 8 hours and the change difference of the soil sample weight weighed each time is within 0.02%, determining that the soil sample is completely dried;
step 4, slurry preparation; weighing 1000g of the dried soil sample by using an electronic scale, putting the dried soil sample into a preparation barrel, adding a small amount of airless water in a plurality of times, and stirring by using a stirring rod until the slurry flows uniformly and has no caking; continuously adding the airless water until the water content reaches 1.8-2.5 times of liquid limit; the distance between the liquid level and the water filling port in the whole water adding process is not more than 3cm, so that the air is reduced;
step 5, mud is subjected to material sealing; sealing a material preparation barrel filled with the slurry by using a preservative film, sealing the material for 15 hours to uniformly mix water and soil, and vibrating once every 3 hours to remove bubbles in the slurry;
step 7, injecting slurry; the smoldered slurry is injected into the installed sample preparation device at a constant speed by using a funnel and a rubber tube, the vertical distance between the mouth of the rubber tube and the liquid level of the slurry is not higher than 3cm in the grouting process so as to prevent air from being mixed in, and the sample preparation device is vibrated slightly;
step 8, pressurizing and solidifying or/and vacuum pumping;
and 9, observing the water quantity change in the measuring cylinder 9, when the water discharge reaches a preset value, selectively closing the vacuum pump 10 according to actual conditions, waiting for the vacuum negative pressure in the device to be slowly discharged to 0kPa, and standing the device for 1 hour so as to facilitate the disassembly of the subsequent sample preparation device.
Compared with the prior art, the invention has the advantages that:
the method has the advantages that: the mounting and connection of the invention mostly adopt a mortise and tenon buckling mode, so that the soil sample can be more accurately close to the required standard size; a vacuum bin with higher tightness is formed, so that water and gas can be conveniently discharged, and the control on the water content is more accurate; and effectively reduced when tearing open the appearance disturbance degree to the soil sample, avoided carrying out the secondary cutting to soil sample inside and outside diameter, provide probably for once only making fast the saturated hollow cylinder sample that has the inside and outside diameter of international common standard.
The method has the advantages that: the invention combines two common slurry consolidation methods, exerts the advantages of the vacuum consolidation method of efficiently and uniformly discharging water and gas in the soil sample, and simultaneously adopts the pressurization consolidation to make up the defect of easily causing the soil sample to be in a hyperconjugation state in the vacuum consolidation, thereby greatly improving the consolidation efficiency, shortening the sample preparation period, and the prepared sample can better meet the requirements of actual tests. The improved consolidation device is simpler, more convenient and smaller, and effectively prevents the slurry layering phenomenon, so that the prepared sample is more uniform, and the comparative analysis of the hollow cylinder torsional shear test result is facilitated.
The method has the advantages that: the invention can realize the one-time rapid manufacture of saturated hollow cylindrical samples with domestic common standard inner and outer diameters of 60mm multiplied by 100 mm.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of an inner cylinder 1 according to the present invention;
FIG. 2 is a schematic structural view of the inner cylinder 1 of the present invention;
FIG. 3 is a schematic view of the outer cylinder 2 of the present invention;
FIG. 4 is a schematic view of the outer cylinder 2 of the present invention;
FIG. 5 is a schematic view of the outer cylinder 2 of the present invention;
FIG. 6 is a schematic structural view of the water permeable top cover 3 of the present invention;
FIG. 7 is a schematic view of the structure of the drainage tray 4 of the present invention;
FIG. 8 is a schematic view of the structure of the drainage tray 4 of the present invention;
fig. 9 is a schematic structural view of the pressure bearing cap 5 of the present invention;
fig. 10 is a schematic view of the structure of the sealing gasket 6 of the present invention;
FIG. 11 is a schematic view of the present invention in use;
fig. 12 is a schematic structural view of the water-gas separation device of the present invention.
The sequence numbers in the figures show: an inner cylinder 1; an inner barrel assembly 101; a fixing groove 102; water permeable holes 103; the outer cylinder 2 is consolidated; a consolidation outer barrel assembly 201; a stationary table 202; a fixing hole a 203; a locking block 204; a limiting groove 205; a stop block 206; a water permeable top cover 3; a drainage chassis 4; an outer barrel clamping groove 401; an inner barrel slot 402; a water collection hole 403; a pressure bearing cover 5; a sealing gasket 6; a test stand 7; a water-gas separation device 8; a measuring cylinder 9; a vacuum pump 10.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings, in order that the present disclosure may be more fully understood and fully conveyed to those skilled in the art. While the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the invention is not limited to the embodiments set forth herein.
The installation method of the sample preparation device of the hollow cylindrical sample comprises the following steps:
step 1, placing a drainage chassis 4 on a test rack 7, and keeping the drainage chassis 4 horizontal;
step 2, uniformly coating a layer of vacuum sealing grease on the edge of the four-petal inner cylinder assembly 101, aligning and folding the four-petal inner cylinder assembly 101, and inserting the four-petal inner cylinder assembly into an inner cylinder clamping groove 402 of the drainage chassis 4;
step 3, uniformly coating a layer of vacuum sealing grease on the edge of the matched water-permeable top cover 3, and clamping the vacuum sealing grease into a fixing groove 102 at the top end of the inner cylinder assembly 101;
step 4, wetting circular filter paper with the diameter of 60mm, and flatly attaching the circular filter paper to the water-permeable top cover 3; wetting a filter paper strip with the width of 10-12mm, and flatly attaching the filter paper strip to the water permeable hole 103 of the inner cylinder assembly 101; aims to accelerate the drainage of the soil sample and prevent fine particles in the soil from being filtered out; the assembly of the inner cylinder 1 is completed;
step 5, placing the sealing washer 6 into the outer cylinder clamping groove 401 of the drainage chassis 4;
step 6, uniformly coating a layer of vacuum sealing grease on the inner sides of the limiting grooves 205 of the two-petal outer cylinder consolidation component 201, folding the two-petal outer cylinder consolidation component 201, extending bolts into bolt holes of two adjacent locking blocks 204 to fix the two-petal outer cylinder consolidation component 201 into a whole, and completing the assembly of the consolidation outer cylinder 2;
step 7, vertically inserting the assembled consolidation outer cylinder 2 into an outer cylinder clamping groove 401 of the drainage base 4, aligning the fixing hole A203 and the fixing hole B404, adjusting the fixation holes to be completely attached to the drainage base 4, fixing the consolidation outer cylinder 2 on the drainage chassis 4 through bolts, and connecting the consolidation outer cylinder 2 and the drainage chassis 4 through the bolts; and finishing the installation of the sample preparation device of the hollow cylindrical sample.
The use method of the sample preparation device for the hollow cylindrical sample comprises the following steps:
step 1, air-drying a soil sample; spreading the soil sample obtained on site into a thin layer of 0.5-0.8 cm, spreading on clean kraft paper, placing in a shady, dry and ventilated place, and turning over once every 1 hour to accelerate the drying of the soil sample;
step 2, removing impurities from the soil sample; placing the air-dried soil sample on a rubber plate, and grinding the soil sample by using wood, wherein the gravel cannot be crushed in the grinding process; sieving the rolled soil sample by a sieve with 2mm holes to remove larger impurities in the soil sample;
step 3, drying the soil sample; and flatly spreading the soil sample without impurities into a drying box, drying at 105-110 ℃, weighing the soil sample once every two hours, and when the drying time is not less than 8 hours and the change difference of the soil sample weight weighed each time is within 0.02%, determining that the soil sample is completely dried. Note: the above specification applies to soils having an organic content of no more than 5% by mass of the dry soil sample; if the organic matter content in the soil sample is 5-10%, the drying temperature is set to 65-70 ℃.
Step 4, slurry preparation; weighing 1000g of the dried soil sample by using an electronic scale, putting the dried soil sample into a preparation barrel, adding a small amount of airless water in a plurality of times, and stirring by using a stirring rod until the slurry flows uniformly and has no caking; continuously adding the airless water until the water content reaches 1.8-2.5 times of liquid limit; the distance between the liquid level and the water filling port in the whole water adding process is not more than 3cm, so that the air is reduced;
step 5, mud is subjected to material sealing; sealing a material preparation barrel filled with the slurry by using a preservative film, sealing the material for 15 hours to uniformly mix water and soil, and vibrating once every 3 hours to remove bubbles in the slurry;
step 7, injecting slurry; the smoldered slurry is injected into the installed sample preparation device at a constant speed by using a funnel and a rubber tube, the vertical distance between the mouth of the rubber tube and the liquid level of the slurry is not higher than 3cm in the grouting process so as to prevent air from being mixed in, and the sample preparation device is vibrated slightly;
step 8, pressurizing and solidifying or/and vacuum pumping;
step 8.1, pressurizing and consolidating; the water collecting hole 403 of the drainage chassis 4 is connected with the water-gas separating device 8, and the bottom of the water-gas separating device 8 is also connected with the measuring cylinder 9; attaching the wet filter paper to one side of a pressure-bearing cover 5, smearing Vaseline on the side surface of the pressure-bearing cover 5, vertically placing the pressure-bearing cover 5 above a sample preparation device after grouting is finished, and placing a corresponding balance weight on the pressure-bearing cover 5 according to the permeability of a soil sample;
step 8.2, vacuum suction; a water collecting hole 403 of the drainage chassis 4 is connected with a water-gas separating device (8), the water-gas separating device 8 is selectively connected with a vacuum pump 10, and the bottom of the water-gas separating device 8 is also connected with a measuring cylinder 9; starting a power supply of the vacuum pump 10, and applying negative pressure in stages according to 20kPa, 40kPa, 60kPa and 80 kPa; the purpose is to guarantee that seepage is stable in the soil sample, avoids the inside atress inequality of soil sample to cause the defect of system appearance.
And 9, observing the water quantity change in the measuring cylinder 9, when the water discharge reaches a preset value, selectively closing the vacuum pump 10 according to actual conditions, waiting for the vacuum negative pressure in the device to be slowly discharged to 0kPa, and standing the device for 1 hour so as to facilitate the disassembly of the subsequent sample preparation device.
A method for disassembling a sample preparation device of a hollow cylindrical sample comprises the following steps:
step 1, dismounting instruments required by pressurization consolidation or/and vacuum suction, dismounting bolts between two sections of consolidation outer cylinder assemblies 201, dismounting bolts between a consolidation outer cylinder 2 and a drainage chassis 4, and taking down the drainage chassis 4;
step 2, vertically placing the device with the drainage chassis 4 removed, carefully opening the two sections of the consolidation outer cylinder assemblies 201 towards two sides, and taking down the consolidation outer cylinder assemblies 201;
step 3, cutting the soil sample from the upper part until the water-permeable top cover 3 is completely leaked out, and taking down the water-permeable top cover 3;
step 4, peeling the four-petal inner cylinder assembly 101 outwards in sequence, and taking out carefully;
and 5, cutting the soil sample to a specified height to obtain a standard hollow cylindrical sample meeting the test requirements, wherein the standard hollow cylindrical sample has the specification of the inner diameter multiplied by the outer diameter multiplied by the height: 60 mm. times.100 mm. times.200 mm.
A sample preparation device for a hollow cylindrical sample comprises an inner cylinder 1, a consolidation outer cylinder 2, a water permeable top cover 3 and a drainage chassis 4.
The inner cylinder 1 comprises four inner cylinder components 101 which are arranged in an arc shape, and the four inner cylinder components 101 are combined into the inner cylinder 1 with a hollow inner part; the bottom of the inner cylinder assembly 101 is flat, fixing grooves 102 which are concave in a convex shape are formed in the top of the inner cylinder assembly, and the fixing grooves 102 which are opposite to each other on the left side and the right side are integrally formed into a cross shape; a plurality of water permeable holes 103 penetrating through the inner cylinder 1 are uniformly distributed on the side surface of the inner cylinder component 101 at intervals; the bottom of the inner cylinder 1 is integrally placed in the drainage chassis 4.
The consolidation outer cylinder 2 comprises two semi-circular consolidation outer cylinder components 201, the bottom of the consolidation outer cylinder components 201 is provided with a fixing table 202 in an outward convex shape, and the fixing table 202 is provided with a fixing hole A203 penetrating through the fixing table 202; the top of the consolidation outer cylinder component 201 is provided with a locking block 204 which is convex and provided with bolt holes, after the two sections of consolidation outer cylinder components 201 are oppositely placed, bolts extend into the bolt holes of the two adjacent locking blocks 204 to fix the two sections of consolidation outer cylinder components 201 into a whole; one side of the consolidation outer cylinder 2 is provided with an inward concave limiting groove 205, the other side is provided with an outward convex limiting block 206, and the limiting groove 205 and the limiting block 206 are mutually connected in a clamping way; the bottom of the consolidation outer cylinder 2 is integrally placed in the drainage chassis 4.
The outer edge profile of the water permeable top cover 3 is consistent with the hollow outer edge profile of the top of the inner cylinder 1, the water permeable top cover 3 is detachably arranged at the top of the inner cylinder 1, and a through hole is formed in the center of the water permeable top cover 3.
The whole body of the drainage chassis 4 is disc-shaped, a water collecting hole 403 penetrating through the drainage chassis 4 is formed in the drainage chassis 4, an inner concave inner cylinder clamping groove 402 is formed in the outer side of the water collecting hole 403, an inner concave outer cylinder clamping groove 401 is formed in the outer side of the inner cylinder clamping groove 402, and fixing holes B404 matched with the fixing holes A203 are uniformly distributed on the drainage chassis 4 at intervals.
The sample preparation device of the hollow cylindrical sample further comprises a pressure bearing cover 5, the pressure bearing cover 5 is integrally disc-shaped, and the outer diameter of the pressure bearing cover 5 is smaller than the inner diameter of the consolidation outer cylinder 2.
The sample preparation device for the hollow cylindrical sample further comprises a sealing washer 6, and the sealing washer 6 is placed in the clamping groove 401 of the outer cylinder.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described above with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the above detailed description of the embodiments of the invention presented in the drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. 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.

Claims (4)

1.一种空心圆柱试样的制样装置的安装方法,其特征在于:包括有以下步骤:1. the installation method of the sample preparation device of a hollow cylinder sample is characterized in that: comprise the following steps: 步骤(1)、放置排水底盘(4)于试验架(7)上,并保持排水底盘(4)水平;Step (1), place the drainage chassis (4) on the test stand (7), and keep the drainage chassis (4) horizontal; 步骤(2)、在四瓣内筒组件(101)的边缘均匀涂抹一层真空密封脂,将四瓣内筒组件(101)对齐合拢后,插入排水底盘(4)的内筒卡槽(402);Step (2): Evenly apply a layer of vacuum sealing grease on the edge of the four-lobed inner cylinder assembly (101), align and close the four-lobed inner cylinder assembly (101), and insert it into the inner cylinder slot (402) of the drainage chassis (4). ); 步骤(3)、将配套的透水顶盖(3)边缘均匀涂抹一层真空密封脂,卡入内筒组件(101)顶端的固定槽(102);Step (3): Evenly apply a layer of vacuum sealing grease to the edge of the matching permeable top cover (3), and then snap it into the fixing groove (102) at the top of the inner cylinder assembly (101); 步骤(4)、将直径为60mm的圆形滤纸润湿,平整的贴附于透水顶盖(3);将宽度为10-12mm的滤纸条润湿,平整的贴附于内筒组件(101)的透水孔(103)处;完成内筒(1)的组装;Step (4), wetting the circular filter paper with a diameter of 60mm, and flatly attaching it to the permeable top cover (3); Wetting the filter paper strip with a width of 10-12mm and flatly attaching it to the inner cylinder assembly ( 101) at the water permeable hole (103); complete the assembly of the inner cylinder (1); 步骤(5)、将密封垫圈(6)放入排水底盘(4)的外筒卡槽(401)内;Step (5), put the sealing gasket (6) into the outer cylinder groove (401) of the drainage chassis (4); 步骤(6)、将两瓣固结外筒组件(201)的限位槽(205)内侧均匀涂抹一层真空密封脂并将两瓣固结外筒组件(201)合拢,将螺栓伸入相邻两个锁紧块(204)螺栓孔内部将两瓣固结外筒组件(201)固定成整体,完成固结外筒(2)的组装;Step (6): Evenly apply a layer of vacuum sealing grease to the inner side of the limiting groove (205) of the two-lobe consolidation outer cylinder assembly (201), close the two-lobe consolidation outer cylinder assembly (201), and extend the bolts into the Inside the bolt holes of the adjacent two locking blocks (204), the two-lobed consolidation outer cylinder assembly (201) is fixed as a whole to complete the assembly of the consolidation outer cylinder (2); 步骤(7)、将组装完成的固结外筒(2)垂直插入排水底座(4)的外筒卡槽(401)内,并使得固定孔A(203)和固定孔B(404)对齐,调整至与排水底座(4)完全贴合后,通过螺栓将所述固结外筒(2)固定于所述排水底盘(4)上,通过螺栓将两者连接;完成空心圆柱试样的制样装置的安装。In step (7), vertically insert the assembled consolidated outer cylinder (2) into the outer cylinder slot (401) of the drainage base (4), and align the fixing hole A (203) with the fixing hole B (404), After being adjusted to be fully fitted with the drainage base (4), the consolidation outer cylinder (2) is fixed on the drainage base (4) by bolts, and the two are connected by bolts; the preparation of the hollow cylindrical sample is completed. installation of the sample device. 2.一种空心圆柱试样的制样装置的使用方法,其特征在于:包括有以下步骤:2. the using method of the sample preparation device of a hollow cylindrical sample is characterized in that: comprise the following steps: 步骤1、土样风干;将现场取得的土样摊成0.5cm-0.8cm的薄层,平铺在干净的牛皮纸上,置于阴凉干燥通风处,每隔1小时翻动一次;Step 1. Air-dry the soil sample; spread the soil sample obtained on site into a thin layer of 0.5cm-0.8cm, lay it flat on clean kraft paper, place it in a cool, dry and ventilated place, and turn it every 1 hour; 步骤2、土样去杂;将风干好的土样放在橡皮板上用木碾碾散,碾压过程中注意不能压碎石砾;将碾压过的土样过2mm孔筛,去除土样中较大的杂质;Step 2. Remove impurities from the soil sample; place the air-dried soil sample on a rubber plate and use a wooden mill to disperse it. During the rolling process, be careful not to crush the gravel; pass the crushed soil sample through a 2mm sieve to remove the soil. Larger impurities in the sample; 步骤3、土样烘干;将去除杂质的土样平铺放入烘干箱,在105℃-110℃下进行烘干,每隔两小时称量一次质量,当烘干时长不小于8小时且每次称量土样质量的变化差值在0.02%内时,视为完全烘干;Step 3. Dry the soil sample; place the soil sample from which impurities have been removed into a drying box, dry it at 105°C-110°C, and weigh the mass every two hours, and the drying time is not less than 8 hours. And when the difference in the quality of each weighing of the soil sample is within 0.02%, it is considered to be completely dried; 步骤4、泥浆配置;用电子秤称量烘干土样1000g放入备料桶,少量、分次加入无气水,并用搅拌棒拌和至泥浆均匀流动、无结块;继续加入无气水,至含水率达到1.8-2.5倍液限;整个加水过程液面距注水口的距离不得高于3cm,以减少空气的混入;Step 4. Slurry configuration; use an electronic scale to weigh 1000g of the dried soil sample and put it into the preparation bucket, add anhydrous water in small amounts and in stages, and mix with a stirring rod until the mud flows evenly and has no agglomeration; continue to add anhydrous water until The water content reaches 1.8-2.5 times the liquid limit; the distance between the liquid surface and the water injection port during the entire water addition process should not be higher than 3cm to reduce the mixing of air; 步骤5、泥浆闷料;将盛有泥浆的备料桶用保鲜膜密封,闷料15小时使其水土混合均匀,期间每隔3小时进行一次振动,以排除泥浆中的气泡;Step 5. The mud is stuffed; seal the preparation bucket containing the mud with plastic wrap, and the stuffing is stuffed for 15 hours to make the soil and water mix evenly, and vibrate every 3 hours during this period to remove air bubbles in the mud; 步骤7、泥浆注入;利用漏斗与橡胶管将焖好的泥浆匀速注入安装完成的制样装置中,注浆过程中橡胶管口于泥浆液面的垂直距离不高于3cm,以防止空气混入,并轻轻振捣制样装置;Step 7. Mud injection; use the funnel and rubber tube to inject the stewed mud into the installed sample preparation device at a constant speed. During the grouting process, the vertical distance between the rubber nozzle and the mud surface is not higher than 3cm to prevent air from mixing. And gently vibrate the sample preparation device; 步骤8、加压固结或/和真空抽吸;Step 8, pressure consolidation or/and vacuum suction; 步骤9、观察量筒(9)中的水量变化,当排水量达到预定值时,根据实际情况选择关闭真空泵(10)等待装置内的真空负压缓慢卸至0kPa,将装置静置1小时,以便后续制样装置的拆卸。Step 9. Observe the change of the water volume in the graduated cylinder (9), when the displacement reaches the predetermined value, choose to close the vacuum pump (10) according to the actual situation, wait for the vacuum negative pressure in the device to be slowly discharged to 0kPa, and let the device stand for 1 hour, so as to facilitate the follow-up. Disassembly of the sample preparation device. 3.根据权利要求2所述的空心圆柱试样的制样装置的使用方法,其特征在于:步骤8中包括有以下步骤:3. the using method of the sample preparation device of the hollow cylindrical sample according to claim 2, is characterized in that: in step 8, comprises the following steps: 步骤8.1、加压固结;将排水底盘(4)的集水孔(403)连接水气分离装置(8),水气分离装置(8)的底部还连接于量筒(9);将湿润的滤纸贴在承压盖(5)一侧,将承压盖(5)侧面涂抹凡士林后垂直放入注浆完成后的制样装置上方,并根据土样的渗透率的大小在承压盖(5)上放置相应的配重;Step 8.1, pressurized consolidation; connect the water collecting hole (403) of the drainage chassis (4) to the water-gas separation device (8), and the bottom of the water-gas separation device (8) is also connected to the measuring cylinder (9); The filter paper is attached to the side of the pressure-bearing cover (5), and the side of the pressure-bearing cover (5) is smeared with Vaseline and placed vertically above the sample preparation device after the grouting is completed. 5) Place the corresponding counterweight on it; 步骤8.2、真空抽吸;将排水底盘(4)的集水孔(403)连接水气分离装置(8),水气分离装置(8)选择性连接于真空泵(10),水气分离装置(8)的底部还连接于量筒(9);开启真空泵(10)电源,按照20kPa、40kPa、60kPa、80kPa分级施加负压。Step 8.2, vacuum suction; connect the water collecting hole (403) of the drainage chassis (4) to the water-gas separation device (8), and the water-gas separation device (8) is selectively connected to the vacuum pump (10), and the water-gas separation device ( The bottom of 8) is also connected to the measuring cylinder (9); turn on the power supply of the vacuum pump (10), and apply negative pressure according to 20kPa, 40kPa, 60kPa, 80kPa grades. 4.一种空心圆柱试样的制样装置的拆卸方法,其特征在于:包括有以下步骤:4. a disassembly method of the sample preparation device of a hollow cylindrical sample, is characterized in that: comprise the following steps: 步骤(1)、将加压固结或/和真空抽吸所需的器械卸下,将两瓣固结外筒组件(201)之间的螺栓卸下,将所述固结外筒(2)与所述排水底盘(4)之间的螺栓卸下,取下排水底盘(4);Step (1), remove the equipment required for pressure consolidation or/and vacuum suction, remove the bolts between the two-lobed consolidation outer cylinder assemblies (201), and remove the consolidation outer cylinder (201). ) and the drainage chassis (4), remove the bolts, and remove the drainage chassis (4); 步骤(2)、将拆掉排水底盘(4)的装置垂直放置,并将两瓣固结外筒组件(201)向两边小心打开,取下固结外筒组件(201);Step (2), vertically place the device from which the drainage chassis (4) was removed, and carefully open the two-lobed consolidated outer cylinder assembly (201) to both sides, and remove the consolidated outer cylinder assembly (201); 步骤(3)、从上部切削土样至透水顶盖(3)完全漏出,取下透水顶盖(3);In step (3), the soil sample is cut from the upper part until the permeable top cover (3) leaks out completely, and the permeable top cover (3) is removed; 步骤(4)、将四瓣内筒组件(101)依次向外剥离,小心取出;Step (4), peel off the four-lobed inner cylinder assembly (101) outward in turn, and take it out carefully; 步骤(5)、切削土样至规定高度,即得到符合试验要求的标准空心圆柱试样,标准空心圆柱试样的规格内直径×外直径×高度:60mm×100mm×200mm。Step (5), cutting the soil sample to a specified height, that is, to obtain a standard hollow cylindrical sample that meets the test requirements. The specification of the standard hollow cylindrical sample is inner diameter × outer diameter × height: 60 mm × 100 mm × 200 mm.
CN202110338434.2A 2021-03-30 2021-03-30 Mounting method, dismounting method and using method of hollow cylindrical sample Pending CN112985948A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110338434.2A CN112985948A (en) 2021-03-30 2021-03-30 Mounting method, dismounting method and using method of hollow cylindrical sample

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110338434.2A CN112985948A (en) 2021-03-30 2021-03-30 Mounting method, dismounting method and using method of hollow cylindrical sample

Publications (1)

Publication Number Publication Date
CN112985948A true CN112985948A (en) 2021-06-18

Family

ID=76338077

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110338434.2A Pending CN112985948A (en) 2021-03-30 2021-03-30 Mounting method, dismounting method and using method of hollow cylindrical sample

Country Status (1)

Country Link
CN (1) CN112985948A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114184498A (en) * 2021-11-18 2022-03-15 中国科学院武汉岩土力学研究所 Method for evaluating disturbance degree of undisturbed hollow cylindrical sample of residual soil
CN114383908A (en) * 2022-01-06 2022-04-22 江苏科技大学 Saturator, triaxial test sample preparation device and sample preparation method
CN115290405A (en) * 2022-05-30 2022-11-04 郑州大学 Sample preparation device and method for mud-skin-containing high polymer solidified soil and concrete shear sample
CN119779749A (en) * 2025-03-10 2025-04-08 内蒙古农业大学 A salt-thermal power cone-arc knife temperature-controlled non-disturbance cone-shaped frozen soil shaping device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101738337A (en) * 2009-12-09 2010-06-16 中国矿业大学 Quick preparation device and method of saturated soil sample
CN104990775A (en) * 2015-07-07 2015-10-21 董彤 Hollow cylinder sample saturator
CN106680022A (en) * 2016-11-28 2017-05-17 南京大学 Sampling device and method for permeability experiment of easily loosened undisturbed coarse-grained soil
CN107036862A (en) * 2017-03-21 2017-08-11 河海大学 A kind of time-controlled type thermal-insulating type remodeling sample preparation device and method
US20180127938A1 (en) * 2016-11-08 2018-05-10 Guangxi University Water-permeable pipe pile system capable of accelerating soil consolidation and method of using the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101738337A (en) * 2009-12-09 2010-06-16 中国矿业大学 Quick preparation device and method of saturated soil sample
CN104990775A (en) * 2015-07-07 2015-10-21 董彤 Hollow cylinder sample saturator
US20180127938A1 (en) * 2016-11-08 2018-05-10 Guangxi University Water-permeable pipe pile system capable of accelerating soil consolidation and method of using the same
CN106680022A (en) * 2016-11-28 2017-05-17 南京大学 Sampling device and method for permeability experiment of easily loosened undisturbed coarse-grained soil
CN107036862A (en) * 2017-03-21 2017-08-11 河海大学 A kind of time-controlled type thermal-insulating type remodeling sample preparation device and method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114184498A (en) * 2021-11-18 2022-03-15 中国科学院武汉岩土力学研究所 Method for evaluating disturbance degree of undisturbed hollow cylindrical sample of residual soil
CN114184498B (en) * 2021-11-18 2024-02-09 中国科学院武汉岩土力学研究所 Evaluation method for disturbance degree of undisturbed hollow cylinder sample of residual soil
CN114383908A (en) * 2022-01-06 2022-04-22 江苏科技大学 Saturator, triaxial test sample preparation device and sample preparation method
CN114383908B (en) * 2022-01-06 2023-06-20 江苏科技大学 A saturator, triaxial test sample preparation device and sample preparation method
CN115290405A (en) * 2022-05-30 2022-11-04 郑州大学 Sample preparation device and method for mud-skin-containing high polymer solidified soil and concrete shear sample
CN119779749A (en) * 2025-03-10 2025-04-08 内蒙古农业大学 A salt-thermal power cone-arc knife temperature-controlled non-disturbance cone-shaped frozen soil shaping device
CN119779749B (en) * 2025-03-10 2025-05-27 内蒙古农业大学 A salt-thermal power cone-arc knife temperature-controlled non-disturbance cone-shaped frozen soil shaping device

Similar Documents

Publication Publication Date Title
CN112985948A (en) Mounting method, dismounting method and using method of hollow cylindrical sample
CN110082275B (en) Large-scale original grading coarse-grained soil vertical penetration deformation tester and test method
CN103335876B (en) Soft clay sample preparation device and method is reinvented based on vacuum combined electroosmosis
CN105784444B (en) Indoor hollow cylinder reshaped clay sample compression preparation facilities and its method
CN111208042B (en) A device and method for inverting hydraulic parameters of unsaturated garbage soil
CN110672494B (en) Method for rapidly measuring different porosities of porous concrete
CN109085036A (en) A kind of device and application method of Quick uniform preparation triaxial test soil sample
CN106198137A (en) A kind of unimolecule high polymer stockpile three axle sample making apparatus and using method
Ameta et al. Effect of bentonite on permeability of dune sand
CN102507410A (en) Device and method for simultaneously testing water seepage and drainage capacities of asphalt mixture
CN107422106B (en) A method for on-site quantitative evaluation of anti-segregation properties of fresh concrete materials
CN102353624A (en) Plastic concrete permeability test device and its test method
CN113552037A (en) A device and method for testing seepage parameters of garbage dual porosity
CN117686403A (en) Open graded asphalt concrete circulating water multichannel static pressure penetration test device and method
CN214472179U (en) A sample preparation device for hollow cylindrical samples
CN108824502A (en) A kind of Multi-functional indoor model test apparatus for the processing of weak soil preloading method
US4059376A (en) Apparatus for moulding hydraulic cement or the like material
CN206546279U (en) A kind of soft clay one side discharging consolidation accurate sample preparation device of controllable water content and void ratio
CN111650026A (en) A non-destructive preservation process of granular soil samples
Al-Mhaidib et al. Influence of swell on shear strength of expansive soils
CN106442051A (en) Method for artificially preparing structured soil
CN112255064A (en) Method for testing relative density of coarse soil and measuring and calculating rolling parameters
US4176965A (en) Method and apparatus for weighing aggregates
Ergun et al. Negative skin friction from surface settlement measurements in model group tests
CN206891916U (en) A kind of device for determining unsaturated soil water diffusivity

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination