CN101509865B - Nonsaturated soil hydraulic parameter measuring device - Google Patents

Nonsaturated soil hydraulic parameter measuring device Download PDF

Info

Publication number
CN101509865B
CN101509865B CN2009101193570A CN200910119357A CN101509865B CN 101509865 B CN101509865 B CN 101509865B CN 2009101193570 A CN2009101193570 A CN 2009101193570A CN 200910119357 A CN200910119357 A CN 200910119357A CN 101509865 B CN101509865 B CN 101509865B
Authority
CN
China
Prior art keywords
water
sample
air pressure
control valve
pipeline
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.)
Expired - Fee Related
Application number
CN2009101193570A
Other languages
Chinese (zh)
Other versions
CN101509865A (en
Inventor
李志清
胡瑞林
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.)
Institute of Geology and Geophysics of CAS
Original Assignee
Institute of Geology and Geophysics of CAS
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 Institute of Geology and Geophysics of CAS filed Critical Institute of Geology and Geophysics of CAS
Priority to CN2009101193570A priority Critical patent/CN101509865B/en
Publication of CN101509865A publication Critical patent/CN101509865A/en
Application granted granted Critical
Publication of CN101509865B publication Critical patent/CN101509865B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

本发明是一种非饱和土水力参数测定装置，该装置由压力室12、气压泵21、真空泵8、加载框架10、仪器底座27、水压管路4与20、气压管路11与15组成。压力室12顶部的气压管路连接有第一气压传感器16、第一气压控制阀门18、气压泵21；仪器底座27内的充水管路28与充水控制阀门29相连，试样底座25中央的第二水压管路20连接有下陶土板36、第二水压传感器38、第二水体积量测管17、第二水压控制阀门19、气压泵21；试样顶帽13中央第一水压管路4连接有上陶土板14、第一水压传感器9、第一水体积量测管6、第一水压控制阀门7、真空泵8；上陶土板14与下陶土板36中间安装试样30，试样顶帽13、上陶土板14、试样30、试样底座25由橡胶膜包裹；试样30中间部位穿过橡胶膜的第一气压管路11连接有试样30、第二气压传感器23、第二气压控制阀门22、气压泵21；砝码26的压力通过加载框架10与加压轴3施加于试样上。该装置可以用来测定各种土质在三向加载条件下的土水保持曲线和非饱和渗透系数。

The present invention is a device for measuring hydraulic parameters of unsaturated soil. The device is composed of a pressure chamber 12, an air pressure pump 21, a vacuum pump 8, a loading frame 10, an instrument base 27, hydraulic pipelines 4 and 20, and air pressure pipelines 11 and 15. . The air pressure pipeline on the top of the pressure chamber 12 is connected with the first air pressure sensor 16, the first air pressure control valve 18, and the air pressure pump 21; the water filling pipeline 28 in the instrument base 27 is connected with the water filling control valve 29; The second water pressure pipeline 20 is connected with the lower clay plate 36, the second water pressure sensor 38, the second water volume measuring tube 17, the second water pressure control valve 19, and the air pump 21; The hydraulic pipeline 4 is connected with an upper clay plate 14, a first water pressure sensor 9, a first water volume measuring tube 6, a first water pressure control valve 7, and a vacuum pump 8; the upper clay plate 14 and the lower clay plate 36 are installed in the middle Sample 30, sample top cap 13, upper clay plate 14, sample 30, and sample base 25 are wrapped by a rubber film; the first air pressure pipeline 11 passing through the rubber film in the middle of sample 30 is connected to sample 30, The second air pressure sensor 23 , the second air pressure control valve 22 , the air pressure pump 21 ; the pressure of the weight 26 is applied to the sample through the loading frame 10 and the pressurizing shaft 3 . The device can be used to measure soil-water retention curves and unsaturated permeability coefficients of various soils under three-dimensional loading conditions.

Description

一种非饱和土水力参数测定装置 A device for measuring hydraulic parameters of unsaturated soil

技术领域technical field

本发明是一种土工测试仪器，属于土木工程技术领域。The invention relates to a geotechnical testing instrument, which belongs to the technical field of civil engineering.

背景技术Background technique

非饱和土在我国分布广泛，地球表面广泛分布的天然沉积土，以及工程建设中遇到的土体问题，几乎都是非饱和土问题，真正意义上的饱和土在工程实践中很少见到，这使得非饱和土力学的研究具有非常现实和实际的意义。水力滞后是非饱和土的一个重要特征，水力滞后通常表现在土水保持曲线的滞后性，且土水保持曲线的滞后性受到多种因素影响，如土结构，温度尤其是应力状态的影响。用来描述非饱和土水力特性的两个重要参数就是非饱和渗透系数与土水保持曲线即土体基质吸力与含水量的对应关系。目前国内外还没有用来测定三向加载状态下的土水保持曲线和非饱和渗透系数的仪器。本发明就是用来测定三向加载状态下的土水保持曲线和非饱和土渗透系数两个重要的水力参数。Unsaturated soil is widely distributed in our country. The natural sedimentary soil widely distributed on the surface of the earth and the soil problems encountered in engineering construction are almost all unsaturated soil problems. Saturated soil in the true sense is rarely seen in engineering practice. This makes the study of unsaturated soil mechanics very realistic and practical. Hydraulic hysteresis is an important feature of unsaturated soil, and hydraulic hysteresis is usually manifested in the hysteresis of the soil-water retention curve, which is affected by many factors, such as soil structure, temperature and especially the stress state. Two important parameters used to describe the hydraulic characteristics of unsaturated soil are the corresponding relationship between unsaturated permeability coefficient and soil water retention curve, that is, soil matric suction and water content. At present, there is no instrument at home and abroad to measure the soil-water retention curve and the unsaturated permeability coefficient under the three-dimensional loading state. The invention is used to measure two important hydraulic parameters of the soil-water retention curve and the permeability coefficient of unsaturated soil under the three-way loading state.

发明内容Contents of the invention

本发明目的是提供一种非饱和土水力参数测定装置及测定方法，解决非饱和土在三向加载状态下的土水保持曲线和非饱和渗透系数的测试问题。The object of the present invention is to provide a measuring device and measuring method for hydraulic parameters of unsaturated soil, so as to solve the test problems of soil water retention curve and unsaturated permeability coefficient of unsaturated soil under three-dimensional loading state.

本发明的技术解决方案，其特征是一种非饱和土水力参数测定装置由压力室12、气压泵21、真空泵8、加载框架10、仪器底座27、水压管路4与20、气压管路11与15组成。其中压力室12与仪器底座27通过螺栓2连接，压力室12顶部有垂直位移量测计1与加压轴3。压力室12顶部的第二气压管路15连接有压力室12、第一气压传感器16、第一气压控制阀门18、气压泵21，仪器底座27里的压力室充水管路28与充水控制阀门29相连。仪器底座27上面安装有试样底座25，试样底座上面镶嵌有下陶土板36。试样底座中央的第二水压管路20连接有下陶土板36、第二水压传感器38、第二水体积量测管17、第二水压控制阀门19、气压泵21，第二水体积量测管17上部有第二封水橡胶塞37。试样顶帽13下部镶嵌有上陶土板14，试样顶帽13中央第一水压管路4连接有上陶土板14、第一水压传感器9、第一水体积量测管6、第一水压控制阀门7、真空泵8，第一水体积量测管6上部有第一封水橡胶塞5。上陶土板14与下陶土板36中间安装试样30，试样顶帽13、上陶土板14、试样30、试样底座25由橡胶膜包裹。试样30中间部位穿过橡胶膜的第一气压管路11连接有试样30、第二气压传感器23、第二气压控制阀门22、气压泵21。砝码26通过加压框架10与加压轴3，对准试样顶帽13顶部凹槽对试样施加垂直压力。加载框架10由砝码26、杠杆32、大砝码33、第一转动轴31、第二转动轴39、第三转动轴40、第四转动轴41组成，加载框架10通过固定栓24与仪器底座27连接，带动框架10升降的第二转动轴39和第四转动轴41通过第一金属钩34连接，砝码26与杠杆31通过第二金属钩35连接。The technical solution of the present invention is characterized in that a device for measuring hydraulic parameters of unsaturated soil consists of a pressure chamber 12, an air pressure pump 21, a vacuum pump 8, a loading frame 10, an instrument base 27, hydraulic pipelines 4 and 20, and an air pressure pipeline. Composed of 11 and 15. The pressure chamber 12 is connected to the instrument base 27 through bolts 2 , and the top of the pressure chamber 12 has a vertical displacement measuring gauge 1 and a pressurizing shaft 3 . The second air pressure pipeline 15 on the top of the pressure chamber 12 is connected with the pressure chamber 12, the first air pressure sensor 16, the first air pressure control valve 18, the air pressure pump 21, the pressure chamber water filling pipeline 28 and the water filling control valve in the instrument base 27 29 connected. A sample base 25 is installed on the instrument base 27, and a lower clay plate 36 is inlaid on the sample base. The second water pressure pipeline 20 in the center of the sample base is connected with a lower clay plate 36, a second water pressure sensor 38, a second water volume measuring tube 17, a second water pressure control valve 19, an air pump 21, and a second water pressure control valve 19. The volume measuring tube 17 top has a second water sealing rubber stopper 37. The lower part of the sample top cap 13 is inlaid with an upper clay plate 14, and the first water pressure pipeline 4 in the center of the sample top cap 13 is connected with the upper clay plate 14, the first water pressure sensor 9, the first water volume measuring tube 6, and the first hydraulic pressure pipeline 4. A water pressure control valve 7, a vacuum pump 8, and a first water sealing rubber plug 5 on the top of the first water volume measuring tube 6. The sample 30 is installed in the middle of the upper clay plate 14 and the lower clay plate 36, and the sample top cap 13, the upper clay plate 14, the sample 30, and the sample base 25 are wrapped by a rubber film. The first air pressure pipeline 11 passing through the rubber membrane in the middle of the sample 30 is connected with the sample 30 , the second air pressure sensor 23 , the second air pressure control valve 22 , and the air pressure pump 21 . The weight 26 passes through the pressurization frame 10 and the pressurization shaft 3, and aligns with the top groove of the top cap 13 of the sample to exert vertical pressure on the sample. Loading frame 10 is made up of weight 26, lever 32, large weight 33, first rotating shaft 31, second rotating shaft 39, the 3rd rotating shaft 40, the 4th rotating shaft 41, and loading frame 10 is connected with instrument by fixing bolt 24 The base 27 is connected, the second rotating shaft 39 and the fourth rotating shaft 41 that drive the frame 10 to rise and fall are connected through the first metal hook 34 , and the weight 26 and the lever 31 are connected through the second metal hook 35 .

本发明优点：Advantage of the present invention:

仪器制造简单，测量精度高，满足三向应力要求，可以量测土水保持曲线的增湿段与减湿段，可以直接测定各种土质的非饱和渗透系数。The instrument is simple to manufacture, has high measurement accuracy, meets the requirements of three-dimensional stress, can measure the humidification section and dehumidification section of the soil water retention curve, and can directly measure the unsaturated permeability coefficient of various soils.

本发明适用范围：The scope of application of the present invention:

适用于土木工程中遇到的各种土质的土水保持曲线与非饱和渗透系数的量测。It is suitable for the measurement of soil-water retention curves and unsaturated permeability coefficients of various soils encountered in civil engineering.

附图说明：Description of drawings:

图1是非饱和土水力参数测定装置的结构示意图。其中有：垂直位移量测计1、螺栓2、加压轴3、第一水压管路4、第一封水橡胶塞5、第一水体积量测管6、第一水压控制阀门7、真空泵8、第一水压传感器9、加载框架10、第一气压管路11、压力室12、试样顶帽13、上陶土板14、第二气压管路15、第一气压传感器16、第二水体积量测管17、第一气压控制阀门18、第二水压控制阀门19、第二水压管路20、气压泵21、第二气压控制阀门22、第二气压传感器23、固定栓24、试样底座25、砝码26、仪器底座27、充水管路28、充水控制阀门29、试样30、下陶土板36、第二封水橡胶塞37、第二水压传感器38。Figure 1 is a schematic diagram of the structure of the device for measuring hydraulic parameters of unsaturated soil. Among them are: vertical displacement measuring gauge 1, bolt 2, pressurized shaft 3, first water pressure pipeline 4, first water sealing rubber plug 5, first water volume measuring tube 6, first water pressure control valve 7, Vacuum pump 8, first water pressure sensor 9, loading frame 10, first air pressure pipeline 11, pressure chamber 12, sample top cap 13, upper clay plate 14, second air pressure pipeline 15, first air pressure sensor 16, the first Two water volume measuring tubes 17, the first air pressure control valve 18, the second water pressure control valve 19, the second water pressure pipeline 20, the air pressure pump 21, the second air pressure control valve 22, the second air pressure sensor 23, the fixing bolt 24. Sample base 25, weight 26, instrument base 27, water filling pipeline 28, water filling control valve 29, sample 30, lower clay plate 36, second water sealing rubber plug 37, second water pressure sensor 38.

图2是图1的A-A右视图。其中有：加载框架10、固定栓24、第一转动轴31、杠杆32、大砝码33、第一金属钩34、第二金属钩35、第二转动轴39、第三转动轴40、第四转动轴41。Fig. 2 is a right side view of A-A of Fig. 1 . Wherein there are: loading frame 10, fixed bolt 24, first rotating shaft 31, lever 32, large weight 33, first metal hook 34, second metal hook 35, second rotating shaft 39, third rotating shaft 40, the first Four rotating shafts 41 .

具体实施方式：Detailed ways:

实施例：非饱和土水力参数即土水保持曲线和非饱和渗透系数的测定分为两部分，Embodiment: the mensuration of unsaturated soil hydraulic parameter namely soil-water retention curve and unsaturated permeability coefficient is divided into two parts,

1)土水保持曲线的测定方法：1) Determination method of soil water retention curve:

a.将第一气压管路11从气压泵21上拆除，将第一水压管路4与气压泵21连接，关闭第一气压控制阀门18与第二气压控制阀门22，启动气压泵21，打开第一水压控制阀门7和第二水压控制阀门19，加压将上陶土板14与下陶土板36充水饱和；a. The first air pressure line 11 is removed from the air pressure pump 21, the first hydraulic line 4 is connected to the air pressure pump 21, the first air pressure control valve 18 and the second air pressure control valve 22 are closed, and the air pressure pump 21 is started, Open the first water pressure control valve 7 and the second water pressure control valve 19, and pressurize the upper clay plate 14 and the lower clay plate 36 to be saturated with water;

b.上陶土板14与下陶土板36饱和后，关闭气压泵21，将第一水压管路4与真空泵8连接，关闭第一水压控制阀门7与第二水压控制阀门19，将第一气压管路11与气压泵21连接，将试样顶帽13和试样30安装在底座25上，外面套上橡皮膜，压力室12与底座27由螺栓2连接，通过充水管路28往压力室内充水，待水面距离压力室顶面5～10cm时，关闭充水控制阀门29；b. After the upper clay plate 14 and the lower clay plate 36 are saturated, close the air pump 21, connect the first hydraulic pipeline 4 to the vacuum pump 8, close the first hydraulic control valve 7 and the second hydraulic control valve 19, and The first air pressure pipeline 11 is connected with the air pump 21, the sample top cap 13 and the sample 30 are installed on the base 25, and the rubber film is put on the outside, the pressure chamber 12 and the base 27 are connected by bolts 2, and the water filling pipeline 28 Fill the pressure chamber with water, and close the water filling control valve 29 when the water surface is 5-10 cm away from the top surface of the pressure chamber;

c.将第二水压管路20从气压泵21上拆下，按试验要求增加砝码26，施加垂直压力于试样顶帽13上，同时启动气压泵21，调节第一气压控制阀门18，施加围压，打开第二水压水压阀门19排水，直到达到要求的试样应力状态；c. Remove the second hydraulic pipeline 20 from the air pump 21, add weight 26 according to the test requirements, apply vertical pressure on the top cap 13 of the sample, start the air pump 21 at the same time, and adjust the first air pressure control valve 18 , apply confining pressure, open the second water pressure water pressure valve 19 to drain water until the required stress state of the sample is reached;

d.关闭第二水压控制阀门19，将第二水压管路20与气压泵21连接，调节第二气压控制阀门22与第二水压控制阀门19，通过第二气压传感器23和第二水压传感器38，控制一定大小的孔隙气压力与孔隙水压力，二者之差即为试样的基质吸力s0，通过第二水体积量测管17可以读出进出试样的水量大小，待第二水体积量测管17液面平稳后，结合已知的试样含水量w，可以得出对应基质吸力s0的试样含水量w0，即可得到土水保持曲线上的一组试验数据s0与w0；d. Close the second water pressure control valve 19, connect the second water pressure pipeline 20 with the air pressure pump 21, adjust the second air pressure control valve 22 and the second water pressure control valve 19, and pass the second air pressure sensor 23 and the second water pressure control valve 19. The water pressure sensor 38 controls the pore air pressure and pore water pressure of a certain size. The difference between the two is the matrix suction s 0 of the sample. The water volume in and out of the sample can be read through the second water volume measuring tube 17. After the liquid level of the second water volume measuring tube 17 is stable, combined with the known water content w of the sample, the water content w 0 of the sample corresponding to the matrix suction s 0 can be obtained, and a value on the soil-water retention curve can be obtained. Group test data s 0 and w 0 ;

e.调节第二气压控制阀门22与第二水压控制阀门19，通过第二气压传感器23和第二水压传感器38，改变试样内孔隙气压力与孔隙水压力的大小，即改变试样基质吸力s的大小，待第二水体积量测管17液面变化平稳后，读出进出试样的水量变化值，得到新的对应基质吸力s1的试样含水量w1，即可得到土水保持曲线上的另一组试验数据s1与w1；e. Adjust the second air pressure control valve 22 and the second water pressure control valve 19, through the second air pressure sensor 23 and the second water pressure sensor 38, change the size of the pore air pressure and pore water pressure in the sample, that is, change the sample The size of the matrix suction s, after the liquid level of the second water volume measuring tube 17 changes steadily, read the change value of the water volume entering and leaving the sample, and obtain the new water content w 1 of the sample corresponding to the matrix suction s 1 , which can be obtained Another set of test data s 1 and w 1 on the soil-water retention curve;

f.按试验要求，重复步骤e，即可得到整条土水保持曲线上的试验数据，即可绘出整条土水保持曲线。f. According to the test requirements, repeat step e to obtain the test data on the entire soil-water conservation curve, and draw the entire soil-water conservation curve.

2)非饱和渗透系数的测定方法：2) Determination method of unsaturated permeability coefficient:

a.将第一气压管路11从气压泵21上拆除，将第一水压管路4与气压泵21连接，关闭第一气压控制阀门18与第二气压控制阀门22，启动气压泵21，打开第一水压控制阀门7与第二水压控制阀门19，加压将上陶土板14与下陶土板36充水饱和；a. The first air pressure line 11 is removed from the air pressure pump 21, the first hydraulic line 4 is connected to the air pressure pump 21, the first air pressure control valve 18 and the second air pressure control valve 22 are closed, and the air pressure pump 21 is started, Open the first water pressure control valve 7 and the second water pressure control valve 19, and pressurize the upper clay plate 14 and the lower clay plate 36 to be saturated with water;

b.上陶土板14与下陶土板36饱和后，关闭气压泵21，将第一水压管路4与真空泵8连接，关闭第一水压控制阀门7与第二水压控制阀门19，将第一气压管路11与气压泵21连接，将试样顶帽13和试样30安装在底座25上，外面套上橡皮膜，压力室12与底座27由螺栓2连接，通过充水管路28往压力室内充水，待水面距离压力室顶面5～10cm时，关闭充水控制阀门29；b. After the upper clay plate 14 and the lower clay plate 36 are saturated, close the air pump 21, connect the first hydraulic pipeline 4 to the vacuum pump 8, close the first hydraulic control valve 7 and the second hydraulic control valve 19, and The first air pressure pipeline 11 is connected with the air pump 21, the sample top cap 13 and the sample 30 are installed on the base 25, and the rubber film is put on the outside, the pressure chamber 12 and the base 27 are connected by bolts 2, and the water filling pipeline 28 Fill the pressure chamber with water, and close the water filling control valve 29 when the water surface is 5-10 cm away from the top surface of the pressure chamber;

c.将第二水压管路20从气压泵21上拆下，按试验要求增加砝码26，施加垂直压力于试样顶帽13上，同时启动气压泵21，调节第一气压控制阀门18，施加围压，打开第二水压控制阀门19排水，直到达到要求的试样应力状态；c. Remove the second hydraulic pipeline 20 from the air pump 21, add weight 26 according to the test requirements, apply vertical pressure on the top cap 13 of the sample, start the air pump 21 at the same time, and adjust the first air pressure control valve 18 , apply confining pressure, open the second water pressure control valve 19 to drain water until the required stress state of the sample is reached;

d.关闭第二水压控制阀门19，将第二水压管路20与气压泵21连接，启动真空泵8，调节第二气压控制阀门22与第二水压控制阀门19，通过第二气压传感器23和第二水压传感器38，控制一定大小的孔隙气压力与孔隙水压力，即控制试样的基质吸力S0，通过第二水体积量测管17读出进出试样的水量大小，待第二水体积量测管17液面变化稳定后，得到对应基质吸力S0的试样含水量W0，调节第二水压控制阀门19，略微增加孔隙水压力，使得第二水体积量测管17液面均匀缓慢下降，调节第一水压控制阀门7，使得第一水体积量测管6液面均匀缓慢上升，数值上与第二水体积量测管17数值保持一致，保证出入试样的水量相等，即确保试样内部含水量恒定，记录一定时间内第二水体积量测管17水体积变化值，即可得到对应基质吸力S0的非饱和渗透系数；d. Close the second water pressure control valve 19, connect the second water pressure pipeline 20 with the air pressure pump 21, start the vacuum pump 8, adjust the second air pressure control valve 22 and the second water pressure control valve 19, and pass the second air pressure sensor 23 and the second water pressure sensor 38, control the pore air pressure and pore water pressure of a certain size, that is, control the matrix suction S 0 of the sample, and read the water volume in and out of the sample through the second water volume measuring tube 17, and wait for After the liquid level of the second water volume measuring tube 17 is stable, the water content W 0 of the sample corresponding to the matrix suction S 0 is obtained, and the second water pressure control valve 19 is adjusted to slightly increase the pore water pressure so that the second water volume measurement The liquid level of the tube 17 drops evenly and slowly, adjust the first water pressure control valve 7, so that the liquid level of the first water volume measuring tube 6 rises evenly and slowly, and the value is consistent with the value of the second water volume measuring tube 17, ensuring that the access test The water volume of the sample is equal, that is, to ensure that the internal water content of the sample is constant, and the water volume change value of the second water volume measuring tube 17 is recorded within a certain period of time, and the unsaturated permeability coefficient corresponding to the matrix suction S0 can be obtained;

e.关闭第一水压控制阀门7，调节第二气压控制阀门22和第二水压控制阀门19，改变孔隙气压与孔隙水压大小，即改变试样基质吸力S1，待第二水体积量测管17变化稳定后，表示试样内含水量达到平衡，得到对应基质吸力S1的试样含水量W0，调节第二水压控制阀门19，略微增加孔隙水压力，使得第二水体积量测管17液面均匀缓慢下降，调节第一水压控制阀门7，使得第一水体积量测管6液面均匀缓慢上升，数值上与第二水体积量测管17数值保持一致，保证出入试样的水量相等，即确保试样内部含水量恒定，记录一定时间内第二水体积量测管17水体积变化值，即可得到对应基质吸力值S1的非饱和渗透系数；e. Close the first water pressure control valve 7, adjust the second air pressure control valve 22 and the second water pressure control valve 19, change the pore air pressure and pore water pressure, that is, change the sample matrix suction S1 , wait for the second water volume After the measurement tube 17 changes stably, it means that the water content in the sample has reached equilibrium, and the water content W 0 of the sample corresponding to the matrix suction S 1 is obtained, and the second water pressure control valve 19 is adjusted to slightly increase the pore water pressure, so that the second water The liquid level of the volume measuring tube 17 decreases evenly and slowly, and the first water pressure control valve 7 is adjusted so that the liquid level of the first water volume measuring tube 6 rises evenly and slowly, and the value is consistent with the value of the second water volume measuring tube 17. Ensure that the amount of water entering and exiting the sample is equal, that is, ensure that the internal water content of the sample is constant, record the water volume change value of the second water volume measuring tube 17 within a certain period of time, and then obtain the unsaturated permeability coefficient corresponding to the matrix suction value S1 ;

f.按试验要求，重复步骤e，可以得到试样不同基质吸力值下的非饱和渗透系数。f. According to the test requirements, repeat step e to obtain the unsaturated permeability coefficient of the sample under different matrix suction values.

Claims (2)

1.一种非饱和土水力参数测定装置，其特征是该装置由压力室(12)、气压泵(21)、真空泵(8)、加载框架(10)、仪器底座(27)、第一水压管路(4)、第二水压管路(20)、第一气压管路(11)、第二气压管路(15)组成，压力室(12)与仪器底座(27)通过螺栓(2)连接，压力室(12)顶部有垂直位移量测计(1)和加压轴(3)，压力室(12)顶部的第二气压管路(15)连接有压力室(12)、第一气压传感器(16)、第一气压控制阀门(18)、气压泵(21)，仪器底座(27)里的压力室充水管路(28)与充水控制阀门(29)相连，仪器底座(27)上面安装有试样底座(25)，试样底座(25)上面镶嵌有下陶土板(36)，试样底座(25)中央的第二水压管路(20)连接有下陶土板(36)、第二水压传感器(38)、第二水体积量测管(17)、第二水压控制阀门(19)、气压泵(21)，第二水体积量测管(17)上部有第二封水橡胶塞(37)，试样顶帽(13)下部镶嵌有上陶土板(14)，试样顶帽(13)中央第一水压管路(4)连接有上陶土板(14)、第一水压传感器(9)、第一水体积量测管(6)、第一水压控制阀门(7)、真空泵(8)，第一水体积量测管(6)上部有第一封水橡胶塞(5)，上陶土板(14)与下陶土板(36)中间安装试样(30)，试样顶帽(13)、上陶土板(14)、试样(30)、试样底座(25)由橡胶膜包裹，试样(30)中间部位穿过橡胶膜的第一气压管路(11)连接有试样(30)、第二气压传感器(23)、第二气压控制阀门(22)、气压泵(21)，砝码(26)通过加载框架(10)与加压轴(3)，对准试样顶帽(13)顶部凹槽，对试样(30)施加垂直压力。1. An unsaturated soil hydraulic parameter measuring device is characterized in that the device consists of a pressure chamber (12), an air pump (21), a vacuum pump (8), a loading frame (10), an instrument base (27), a first water pressure pipeline (4), the second water pressure pipeline (20), the first air pressure pipeline (11), the second air pressure pipeline (15), the pressure chamber (12) and the instrument base (27) through the bolt ( 2) connection, the top of the pressure chamber (12) has a vertical displacement gauge (1) and a pressurized shaft (3), the second air pressure line (15) on the top of the pressure chamber (12) is connected with the pressure chamber (12), the second One air pressure sensor (16), the first air pressure control valve (18), air pressure pump (21), the pressure chamber water filling pipeline (28) in the instrument base (27) links to each other with the water filling control valve (29), the instrument base ( 27) The sample base (25) is installed on it, the lower clay plate (36) is inlaid on the sample base (25), and the second hydraulic pipeline (20) in the center of the sample base (25) is connected to the lower clay plate (36), the second water pressure sensor (38), the second water volume measuring tube (17), the second water pressure control valve (19), the air pump (21), the second water volume measuring tube (17) There is a second water-sealing rubber plug (37) on the upper part, an upper clay plate (14) is inlaid on the lower part of the sample top cap (13), and an upper clay plate (14) is connected to the first hydraulic pipeline (4) in the center of the sample top cap (13). Plate (14), first water pressure sensor (9), first water volume measuring tube (6), first water pressure control valve (7), vacuum pump (8), first water volume measuring tube (6) There is the first water sealing rubber plug (5) in the upper part, the sample (30) is installed between the upper clay plate (14) and the lower clay plate (36), the sample top cap (13), the upper clay plate (14), the sample (30), the sample base (25) is wrapped by a rubber film, and the first air pressure pipeline (11) passing through the rubber film in the middle of the sample (30) is connected with the sample (30), the second air pressure sensor (23) , the second air pressure control valve (22), the air pressure pump (21), and the weight (26) through the loading frame (10) and the pressurizing shaft (3), aligning with the top groove of the top cap (13) of the sample, (30) Apply vertical pressure. 2.如权利要求1中所述的测定装置，其特征是加载框架(10)由砝码(26)、第一转动轴(31)、杠杆(32)、大砝码(33)、第二转动轴(39)、第三转动轴(40)、第四转动轴(41)组成，加载框架(10)通过固定栓(24)与仪器底座(27)连接，带动框架(10)升降的第二转动轴(39)和第四转动轴(41)通过第一金属钩(34)连接，砝码(26)与杠杆(32)通过第二金属钩(35)连接。2. measuring device as claimed in claim 1, it is characterized in that loading frame (10) is made of weight (26), first rotating shaft (31), lever (32), large weight (33), second The rotating shaft (39), the third rotating shaft (40) and the fourth rotating shaft (41) are composed, the loading frame (10) is connected with the instrument base (27) through the fixing bolt (24), and drives the frame (10) to go up and down. The second rotating shaft (39) and the fourth rotating shaft (41) are connected through the first metal hook (34), and the weight (26) and the lever (32) are connected through the second metal hook (35).
CN2009101193570A 2009-03-25 2009-03-25 Nonsaturated soil hydraulic parameter measuring device Expired - Fee Related CN101509865B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009101193570A CN101509865B (en) 2009-03-25 2009-03-25 Nonsaturated soil hydraulic parameter measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009101193570A CN101509865B (en) 2009-03-25 2009-03-25 Nonsaturated soil hydraulic parameter measuring device

Related Child Applications (2)

Application Number Title Priority Date Filing Date
CN2010101681045A Division CN101865810B (en) 2009-03-25 2009-03-25 Test method for determining unsaturated soil water characteristic parameters
CN2010101681219A Division CN101865811B (en) 2009-03-25 2009-03-25 A Method for Measuring the Permeability Coefficient of Unsaturated Soil

Publications (2)

Publication Number Publication Date
CN101509865A CN101509865A (en) 2009-08-19
CN101509865B true CN101509865B (en) 2010-08-18

Family

ID=41002331

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009101193570A Expired - Fee Related CN101509865B (en) 2009-03-25 2009-03-25 Nonsaturated soil hydraulic parameter measuring device

Country Status (1)

Country Link
CN (1) CN101509865B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107255614A (en) * 2017-07-27 2017-10-17 洛阳理工学院 Remold measurement and the verification method of unsaturation silty clay infiltration coefficient

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102156076B (en) * 2010-03-26 2013-05-15 中国科学院地质与地球物理研究所 A method for measuring freeze-thaw deformation of soil samples under vertical loading with confinement
CN101806686B (en) * 2010-03-26 2012-06-20 中国科学院地质与地球物理研究所 Testing method used for measuring repeated expansion , shrinkage and deformation of soil sample
CN101813607B (en) * 2010-05-11 2011-04-13 中国科学院地质与地球物理研究所 One-dimensional confining loading hydraulic permeability coefficient tester
CN101806701B (en) * 2010-05-11 2011-05-18 中国科学院地质与地球物理研究所 Testing apparatus used for measuring osmotic potential of unsaturated soil
CN101813606B (en) * 2010-05-11 2011-04-20 中国科学院地质与地球物理研究所 Test method for measuring permeability coefficient of soil body in saturation state or unsaturation state
CN101915718B (en) * 2010-08-20 2012-01-11 中国科学院武汉岩土力学研究所 Multifunctional soil consolidation and penetration test device and test method thereof
CN101915724B (en) * 2010-08-20 2012-06-27 河海大学 Device and method for measuring permeability coefficient of rock material under action of seepage-stress coupling
CN102252947B (en) * 2011-07-07 2013-02-06 西北工业大学 Special device for measuring method of seepage characteristics and method for measuring dynamic seepage characteristics of molten metal
CN102735551A (en) * 2012-06-06 2012-10-17 中国科学院地质与地球物理研究所 A lever type soft rock/hard soil uniaxial compression deformation test device
CN102967695B (en) * 2012-12-05 2014-08-13 重庆交通大学 Soil body water saturation-drainage circulation compression test method and device
CN102944476B (en) * 2012-12-05 2014-08-06 重庆交通大学 Method for triaxial compression test in soil body water saturation-drainage cycle and device
CN103175949B (en) * 2013-03-15 2014-11-05 中国电建集团中南勘测设计研究院有限公司 Device and method for directly testing coarse-grained soil rubber membrane penetration on volume change
CN103234840B (en) * 2013-04-26 2015-01-07 上海大学 Unsaturated soil direct-shear test device with function of controlling suction by negative pore water pressure
CN103698492B (en) * 2013-12-18 2014-08-27 水利部交通运输部国家能源局南京水利科学研究院 Multifunctional tester for anti-seismic property of rockfill material of high rockfill dam
CN103822845B (en) * 2014-01-17 2017-01-18 哈尔滨工业大学深圳研究生院 Anisotropy measurement device and measurement method of hydraulic characteristic of unsaturated soil body
CN103792118B (en) * 2014-01-21 2016-03-23 中国科学院武汉岩土力学研究所 High pressure solution gas saturation testing device and the application in gassiness soil sample is manually prepared thereof
CN104020097B (en) * 2014-06-24 2016-02-24 中国地质大学（武汉） A kind of indoor measurement experiment instrument of unsaturated soil hydraulic conductivity
CN104266950B (en) * 2014-09-03 2017-03-29 中国石油大学(北京) Portable rock core perm-plug method measurement apparatus
CN104897540B (en) * 2015-05-05 2017-11-10 上海大学 A kind of unsaturated soil diffusion soil-column test device
CN105486843A (en) * 2016-01-27 2016-04-13 河北建筑工程学院 Soil body permeation-adsorption tester and testing method thereof
CN106769747B (en) * 2016-11-17 2019-04-30 河海大学 Test device and test method for soil infiltration resistance
CN106885742B (en) * 2017-03-24 2019-06-18 兰州大学 A New Type of Saturated and Unsaturated Permeability Triaxial Instrument
CN108414364B (en) * 2018-02-11 2023-09-15 河南工业大学 A grain pile testing device and a method for measuring grain pile compression deformation and grain pile interface pressure using the device
CN108507931B (en) * 2018-06-22 2023-11-24 三峡大学 A fully automatic measurement method for complete soil-water characteristic curve
CN109270116B (en) * 2018-11-02 2023-12-05 中国地质大学（武汉） Combined test method for measuring matrix suction and thermal conductivity of unsaturated soil
CN110082217B (en) * 2019-04-26 2024-06-21 温州大学 Embedded geotechnical triaxial apparatus and test operation method thereof
CN110274842B (en) * 2019-07-12 2024-03-22 浙江理工大学 MBT waste field water holding capacity measurement method
CN110261279B (en) * 2019-07-18 2021-07-23 湖北工业大学 A Simultaneous Measurement Method of Unsaturated Soil Permeability Coefficient and Soil-Water Characteristic Curve Based on Axis Translation
CN110927037A (en) * 2019-11-04 2020-03-27 山东科技大学 A device for eliminating uneven drainage caused by uneven air pressure loading
CN111610129B (en) * 2020-03-25 2024-07-19 浙江工业大学 Multi-working condition porous medium permeability coefficient determination method and testing device
CN111504793B (en) * 2020-04-23 2021-06-15 中南大学 Device and method for measuring saturated and unsaturated strength of polluted soil body
CN111811962A (en) * 2020-06-15 2020-10-23 温州大学 Combined bending element measuring device for soil-water characteristic curve of unsaturated coarse-grained soil
CN113218725A (en) * 2021-04-06 2021-08-06 湖南城市学院 Vacuum saturation device
CN115808362B (en) * 2023-01-27 2023-04-21 安徽建筑大学 Unsaturated soil power test method based on soil-water characteristic curve
CN117405509B (en) * 2023-07-17 2024-06-28 石家庄铁道大学 Rapid loading consolidation test device and method for full-tailing materials

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107255614A (en) * 2017-07-27 2017-10-17 洛阳理工学院 Remold measurement and the verification method of unsaturation silty clay infiltration coefficient

Also Published As

Publication number Publication date
CN101509865A (en) 2009-08-19

Similar Documents

Publication Publication Date Title
CN101509865B (en) Nonsaturated soil hydraulic parameter measuring device
CN101865810B (en) Test method for determining unsaturated soil water characteristic parameters
CN101813606B (en) Test method for measuring permeability coefficient of soil body in saturation state or unsaturation state
CN102183622B (en) Novel unsaturated soil high-pressure consolidation test device
CN103760320B (en) The method of testing of swelled ground water cut and bulging force relation under tunnel support condition
CN102980809B (en) A kind of soil static lateral pressure coefficient analyzer
CN208171813U (en) A kind of multi-functional permeability test device
CN201628668U (en) A test device for measuring moisture characteristics of unsaturated soil
CN103675231B (en) Soil layer settlement tester and testing method thereof
CN101915718A (en) Consolidation and penetration test device and test method of multifunctional soil
CN103472206B (en) Dual-layer pressure plate instrument for measuring soil-water characteristic curve
CN111896395A (en) A device for measuring the interaction parameters of soil and structure interface and its testing method
CN110196255B (en) Pressure plate instrument for rapid measurement of soil-water characteristic curve and its measurement method
CN101865811B (en) A Method for Measuring the Permeability Coefficient of Unsaturated Soil
CN103792172B (en) Adding pressure type falling head permeameter
CN101806701B (en) Testing apparatus used for measuring osmotic potential of unsaturated soil
CN106644729A (en) Low-confining-pressure static and dynamic triaxial testing system based on MTS power source
CN104020047A (en) Solidification and permeation combined testing device and method
CN102539244A (en) Unsaturated soil anisotropic consolidation test device
CN104020092A (en) Consolidation pore water pressure combined test device and method
CN205786625U (en) A Soil-Water Characteristic Curve Experimental Instrument with Controllable Vertical Stress
CN209656456U (en) Stress-seepage coupling acts on the experimental rig of lower Rock And Soil
CN113959837A (en) An unsaturated soil consolidation and wetting deformation measurement test device capable of accurately measuring the absorption and drainage of a sample and its use method
CN203772853U (en) Rock free swelling ratio and moisture content determining device
CN102879313B (en) Device for testing consolidation and permeation of soil under action of coupling of chemistry and stress

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100818

Termination date: 20160325

CF01 Termination of patent right due to non-payment of annual fee