CN204389353U - A kind of temperature-seepage coupling test test specimen packoff - Google Patents
A kind of temperature-seepage coupling test test specimen packoff Download PDFInfo
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- CN204389353U CN204389353U CN201520064860.1U CN201520064860U CN204389353U CN 204389353 U CN204389353 U CN 204389353U CN 201520064860 U CN201520064860 U CN 201520064860U CN 204389353 U CN204389353 U CN 204389353U
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- 238000012360 testing method Methods 0.000 title claims abstract description 59
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000011435 rock Substances 0.000 claims abstract description 62
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- 238000007789 sealing Methods 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 16
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- 230000003204 osmotic effect Effects 0.000 abstract description 12
- 229920002545 silicone oil Polymers 0.000 abstract description 5
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- 238000010438 heat treatment Methods 0.000 description 2
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- 239000000463 material Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
本实用新型公开了一种温度-渗流耦合试验试件密封装置，包括上水孔压盘、下水孔压盘、热塑管，上水孔压盘与下水孔压盘形状相同，上水孔压盘倒扣在岩石试件的顶部，下水孔压盘向上支撑在岩石试件的底部，热塑管包裹整个岩石试件以及上水孔压盘、下水孔压盘顶部，热塑管与上水孔压盘、下水孔压盘的包裹区域上缠有胶带，胶带外部套有铁丝，热塑管外表面设置有轴向位移引伸计和环向位移引伸计。本实用新型采用热塑管对整个侧漏装置进行密封，实现了试件的完整密封，杜绝了孔隙水与硅油的相互混入，保证了围压和渗透压加载系统的稳定性。
The utility model discloses a temperature-seepage coupling test specimen sealing device, which comprises an upper water hole pressure plate, a lower water hole pressure plate, and a thermoplastic pipe. The upper water hole pressure plate and the lower water hole pressure plate have the same shape, the upper water hole pressure plate The plate is buckled upside down on the top of the rock specimen, and the pressure plate of the downhole is supported upwards on the bottom of the rock specimen. The thermoplastic tube wraps the entire rock specimen, the pressure plate of the upper water hole, and the top of the pressure plate of the downhole. Tape is wrapped around the wrapping area of the pressure plate of the hole and the pressure plate of the downhole, and the outside of the tape is covered with iron wires, and the outer surface of the thermoplastic pipe is provided with an axial displacement extensometer and a circumferential displacement extensometer. The utility model uses a thermoplastic tube to seal the entire side leakage device, which realizes the complete sealing of the test piece, prevents the intermixing of pore water and silicone oil, and ensures the stability of the confining pressure and osmotic pressure loading system.
Description
技术领域 technical field
本实用新型涉及地质技术领域，涉及一种温度‐渗流耦合试验试件密封装置。 The utility model relates to the field of geological technology, and relates to a sealing device for a temperature-seepage coupled test specimen.
背景技术 Background technique
节理裂隙岩体是水力工程、交通运输工程、采矿工程、石油开采、地下隧道工程、核废料地下深埋工程、国防地下建设工程等问题中广泛遇到的工程介质，不同的温度、渗透压力差、围岩应力均对裂隙岩体形变及渗流特性有重要影响，通过岩石温度—渗流—应力耦合作用实验来了解裂隙岩体的渗流力学及其变形特征，为各种岩体工程的设计及其建造提供重要的依据。 Jointed and fractured rock mass is an engineering medium widely encountered in hydraulic engineering, transportation engineering, mining engineering, oil exploitation, underground tunnel engineering, nuclear waste underground deep burial engineering, national defense underground construction engineering, etc. Different temperatures and seepage pressure differences and surrounding rock stress have an important influence on the deformation and seepage characteristics of the fractured rock mass. The seepage mechanics and deformation characteristics of the fractured rock mass are understood through the rock temperature-seepage-stress coupling experiment. Construction provides an important basis.
工程岩体一般处于三向应力状态下，因此，研究岩石在三轴压缩条件下的变形与渗流特性对实际工程更具指导意义。三轴压缩条件下的变形特征主要通过三轴试验进行研究。根据试验的应力状态，三轴试验可分为两类：常规三轴试验和真三轴试验。常规三轴试验的应力状态为σ1>σ2＝σ3>0,即岩石试件受轴压和围压作用，又称为普通三轴试验或假三轴试验。真三轴试验的应力状态为σ1>σ2>σ3>0，即岩石试件在三个彼此不等压三轴试验。目前普遍使用的是常规三轴试验，但传统装置的缺陷：(1)由于没有统一岩石温度—渗流—应力耦合作用试验标准，目前普遍沿用岩石应力作用试验标准对试件进行密封。通常使用热塑管包裹岩石试件，然后用热吹风机对其加热，使之收缩贴合试件外表面，主要是防止岩石破碎时碎渣溅入硅油内，同时具有一定的密封性。(2)传统装置或为简陋或为繁琐，操作非常不便、而且测试数据失真，不适合规模化、稳定化的生产和施用。(3)传统的装置的突出问题还在于，用于渗透—应力耦 合实验时，热塑管密封不严的问题便显现出来。当施加较高渗透压时，水流均从上水孔压盘与试件的上接触面溢出，直接混入硅油内，造成了围压压力失稳、渗透压失真以及硅油的浪费。由于巨大的渗透压差，使得水流极易贯通热塑管和试件的侧隙，形成水流通路，造成岩石渗流假象；水流通路挤涨热塑管，数据采集系统中环向位移引伸计得到的岩石流变环向位移量失真。因此，现行的岩石应力作用试验试件密封标准不适于研究岩石温度—渗流—应力耦合作用试验岩石的渗流特性。(4)此外，目前众多的实验均未涉及到不同温度条件下岩石试件密封装置及方法的研究。岩石在不同温度下表现出不同的岩石力学性质，在不同温度下岩石渗流必将呈现出不同的渗流特性，故研究岩石渗流试验考虑温度的影响也是一项关键的技术。 Engineering rock mass is generally in a state of triaxial stress. Therefore, studying the deformation and seepage characteristics of rock under triaxial compression is more instructive for practical engineering. The deformation characteristics under triaxial compression conditions are mainly studied by triaxial tests. According to the stress state of the test, triaxial tests can be divided into two categories: conventional triaxial tests and true triaxial tests. The stress state of the conventional triaxial test is σ 1 >σ 2 =σ 3 >0, that is, the rock specimen is subjected to axial and confining pressure, and it is also called ordinary triaxial test or pseudo triaxial test. The stress state of the true triaxial test is σ 1 >σ 2 >σ 3 >0, that is, the rock specimen is subjected to three unequal pressure triaxial tests. Conventional triaxial tests are widely used at present, but the defects of traditional devices: (1) Since there is no unified rock temperature-seepage-stress coupling test standard, the rock stress test standard is generally used to seal the specimen. The rock specimen is usually wrapped with a thermoplastic tube, and then heated with a hot blower to make it shrink and fit the outer surface of the specimen, mainly to prevent debris from splashing into the silicone oil when the rock is broken, and to have a certain degree of sealing. (2) The traditional devices are either simple or cumbersome, very inconvenient to operate, and the test data is distorted, so they are not suitable for large-scale and stable production and application. (3) The outstanding problem of the traditional device is that when it is used in the penetration-stress coupling experiment, the problem of the tight sealing of the thermoplastic tube will appear. When a higher osmotic pressure is applied, the water flow overflows from the upper contact surface between the pressure plate of the upper water hole and the test piece, and is directly mixed into the silicone oil, resulting in instability of confining pressure, distortion of osmotic pressure and waste of silicone oil. Due to the huge osmotic pressure difference, the water flow can easily pass through the side gap between the thermoplastic pipe and the specimen, forming a water flow path and causing the false seepage of the rock; Rheological hoop displacement distortion. Therefore, the current sealing standard for rock stress test specimens is not suitable for studying the seepage characteristics of rock in rock temperature-seepage-stress coupling test. (4) In addition, many experiments at present do not involve the research on sealing devices and methods of rock specimens under different temperature conditions. Rocks exhibit different rock mechanical properties at different temperatures, and rock seepage will show different seepage characteristics at different temperatures, so it is also a key technology to study rock seepage tests considering the influence of temperature.
实用新型内容 Utility model content
为了解决上述技术问题，本实用新型提供一种结构简单、密封性好的温度‐渗流耦合试验试件密封装置。 In order to solve the above technical problems, the utility model provides a sealing device for temperature-seepage coupling test specimen with simple structure and good sealing performance.
本实用新型解决上述问题的技术方案是：一种温度‐渗流耦合试验试件密封装置，包括上水孔压盘、下水孔压盘、热塑管，上水孔压盘与下水孔压盘形状相同，上水孔压盘和下水孔压盘的内部均为空心，底部为一密封的平面，顶部为管状部件且顶部设有开口，上水孔压盘上设有进水孔，下水孔压盘上设有出水孔，上水孔压盘的底部朝上、顶部开口向下倒扣在岩石试件的顶部，下水孔压盘的底部向下、顶部开口向上支撑在岩石试件的底部，热塑管包裹整个岩石试件以及上水孔压盘、下水孔压盘顶部的管状部件，热塑管与上水孔压盘、下水孔压盘的顶部包裹区域上缠有胶带，胶带外部套有铁丝，岩石试件中部区域的外热塑管外表面竖向设置有轴向位移引伸计、横向设置有环向位移引伸计。 The technical solution of the utility model to solve the above problems is: a temperature-seepage coupling test specimen sealing device, including the pressure plate of the upper water hole, the pressure plate of the lower water hole, the thermoplastic tube, the shape of the pressure plate of the upper water hole and the pressure plate of the lower water hole The same, the inside of the pressure plate of the upper water hole and the pressure plate of the lower water hole are both hollow, the bottom is a sealed plane, the top is a tubular part with an opening on the top, the pressure plate of the upper water hole is provided with a water inlet hole, and the pressure plate of the lower water hole There is a water outlet hole on the plate, the bottom of the pressure plate of the upper water hole is facing upward, and the top opening is turned down on the top of the rock specimen, and the bottom of the pressure plate of the lower water hole is downward, and the top opening is supported on the bottom of the rock specimen. The thermoplastic tube wraps the entire rock specimen and the tubular parts on the top of the pressure plate of the upper water hole and the pressure plate of the lower water hole. There are iron wires, and the outer surface of the outer thermoplastic pipe in the middle region of the rock specimen is provided with an axial displacement extensometer vertically and a circumferential displacement extensometer horizontally.
上述温度‐渗流耦合试验试件密封装置中，所述岩石试件为圆柱形，其截面大小与上水孔压盘和下水孔压盘的顶部截面面积大小相同。 In the temperature-seepage coupling test specimen sealing device described above, the rock specimen is cylindrical, and its cross-sectional size is the same as the top cross-sectional area of the pressure plate of the upper water hole and the pressure plate of the lower water hole.
上述温度‐渗流耦合试验试件密封装置中，所述热塑管与上水孔压盘的管状部件、下水孔压盘的管状部件、岩石试件接触处均填充有胶。 In the temperature-seepage coupling test specimen sealing device described above, glue is filled in the contact between the thermoplastic pipe, the tubular part of the pressure plate of the upper water hole, the tubular part of the pressure plate of the lower water hole, and the rock specimen.
上述温度‐渗流耦合试验试件密封装置中，所述胶包括环氧胶黏剂和固化剂，环氧胶黏剂和固化剂的质量比为3∶2。 In the above temperature-seepage coupling test specimen sealing device, the glue includes an epoxy adhesive and a curing agent, and the mass ratio of the epoxy adhesive to the curing agent is 3:2.
本实用新型的有益效果在于： The beneficial effects of the utility model are:
1.本实用新型采用热塑管对整个侧漏装置进行密封，实现了试件的完整密封，杜绝了孔隙水与硅油的相互混入，保证了围压和渗透压加载系统的稳定性； 1. The utility model uses a thermoplastic tube to seal the entire side leakage device, which realizes the complete sealing of the test piece, prevents the intermixing of pore water and silicone oil, and ensures the stability of the confining pressure and osmotic pressure loading system;
2.本实用新型在热塑管和岩石试件之间填充有胶，避免了水流从热塑管和试件中的空隙形成渗流通路，进而影响试件环向形变数据采集和渗透系数的测定，保证了试验数据的真实性； 2. The utility model is filled with glue between the thermoplastic pipe and the rock test piece, which prevents the water flow from forming a seepage path from the gap in the thermoplastic pipe and the test piece, thereby affecting the data collection of the circumferential deformation of the test piece and the measurement of the permeability coefficient , to ensure the authenticity of the test data;
附图说明 Description of drawings
图1为本实用新型的结构示意图。 Fig. 1 is the structural representation of the utility model.
图2为岩石试件包裹材料的截面示意图。 Fig. 2 is a schematic cross-sectional view of the rock specimen wrapping material.
图3为装置在试验机上的示意图。 Figure 3 is a schematic diagram of the device on the testing machine.
图4为采用本实用新型前进行三轴试验20℃时渗透压差与时间图。 Fig. 4 is a graph of osmotic pressure difference and time when a triaxial test is carried out at 20° C. before adopting the utility model.
图5为采用本实用新型后进行三轴试验20℃时渗透压差与时间图。 Fig. 5 is a diagram of osmotic pressure difference and time when the utility model is adopted and the triaxial test is carried out at 20°C.
图6为采用本实用新型后进行三轴试验40℃时渗透压差与时间图。 Fig. 6 is a diagram of the osmotic pressure difference and time when the triaxial test is carried out at 40°C after adopting the utility model.
图7为采用本实用新型后进行三轴试验60℃时渗透压差与时间图。 Fig. 7 is a graph of osmotic pressure difference and time when the triaxial test is carried out at 60°C after adopting the utility model.
图中，1.上水孔压盘，2.下水孔压盘，3.进水孔，4.出水孔，5.岩石试件，6.AB胶，7.热塑管，8.胶带，9.铁丝，10.轴向位移引伸计，11.环向位移引伸计，12. 底座插销，13.底座，14.顶部插销，15.固定圆盘，16.环形加热圈，17.温度传感器，18.出油口，19.进油口。 In the figure, 1. Upper water hole pressure plate, 2. Lower water hole pressure plate, 3. Water inlet hole, 4. Water outlet hole, 5. Rock specimen, 6. AB glue, 7. Thermoplastic pipe, 8. Tape, 9. Iron wire, 10. Axial displacement extensometer, 11. Circular displacement extensometer, 12. Base pin, 13. Base, 14. Top pin, 15. Fixed disk, 16. Ring heating ring, 17. Temperature sensor , 18. oil outlet, 19. oil inlet.
具体实施方式 Detailed ways
下面结合附图和实施例对本实用新型作进一步的说明。 Below in conjunction with accompanying drawing and embodiment the utility model is described further.
如图1、图2所示，本实用新型包括上水孔压盘1和下水孔压盘2，上水孔压盘1和下水孔压盘2的形状相同，上水孔压盘1和下水孔压盘2的底部均为一密封的平面且底部中心设有插销孔，上水孔压盘1和下水孔压盘2内部均为空心，顶部为圆柱形的管状部件且顶部设有开口，上水孔压盘1上设有进水孔3，通过进水孔3连接外部的进水管，将水灌入上水孔压盘1内部，下水孔压盘2上设有出水孔4，通过出水孔4连接外部的水管，将下水孔压盘2内的水排出，上水孔压盘1的底部朝上、顶部开口向下倒扣在岩石试件5的顶部，下水孔压盘2的底部向下，顶部开口向上支撑在岩石试件5的底部，岩石试件5为圆柱形，截面大小与上水孔压盘1和下水孔压盘2的顶部开口面积大小相同。整个岩石试件5和上水孔压盘1、下水孔压盘2的管状部件被热塑管7包裹，热塑管7与上水孔压盘1、下水孔压盘2管状部件接触处填充有胶，热塑管7与岩石试件5之间填充有胶，在热塑管7与上水孔压盘1、下水孔压盘2的顶部包裹区域缠有胶带8，胶带8外部套有铁丝9，通过缠绕胶带8和上紧铁丝9将热塑管7紧固，在岩石试件5中部区域的热塑管7外表竖向设置轴向位移引伸计10、横向设置环向位移引伸计11。 As shown in Figure 1 and Figure 2, the utility model includes an upper water hole pressure plate 1 and a lower water hole pressure plate 2, the upper water hole pressure plate 1 and the lower water hole pressure plate 2 have the same shape, the upper water hole pressure plate 1 and the lower water hole The bottom of the hole pressure plate 2 is a sealed plane and the center of the bottom is provided with a pin hole, the inside of the upper water hole pressure plate 1 and the lower water hole pressure plate 2 are both hollow, and the top is a cylindrical tubular part with an opening on the top. The upper water hole pressure plate 1 is provided with a water inlet hole 3, through which the external water inlet pipe is connected, and water is poured into the upper water hole pressure plate 1, and the lower water hole pressure plate 2 is provided with a water outlet hole 4, through which The water outlet hole 4 is connected to the external water pipe, and the water in the pressure plate 2 of the lower water hole is discharged. The bottom is downward, and the top opening is upwardly supported on the bottom of the rock test piece 5. The rock test piece 5 is cylindrical, and the cross-sectional size is the same as the top opening area of the upper water hole pressure plate 1 and the lower water hole pressure plate 2. The entire rock test piece 5 and the tubular parts of the pressure plate 1 of the upper water hole and the pressure plate 2 of the lower water hole are wrapped by the thermoplastic tube 7, and the contact parts of the thermoplastic tube 7 and the pressure plate 1 of the upper water hole and the pressure plate 2 of the lower water hole are filled There is glue, glue is filled between the thermoplastic pipe 7 and the rock test piece 5, and the tape 8 is wrapped around the top wrapping area of the thermoplastic pipe 7 and the pressure plate 1 of the upper water hole and the pressure plate 2 of the lower water hole, and the outside of the tape 8 is covered with The iron wire 9 is used to fasten the thermoplastic pipe 7 by winding the adhesive tape 8 and tightening the iron wire 9. On the outer surface of the thermoplastic pipe 7 in the middle area of the rock specimen 5, an axial displacement extensometer 10 is installed vertically, and a circular displacement extensometer is arranged horizontally. 11.
旋转底座、固定圆盘和两根支撑杆，所述旋转底座的中部设有底座插销，固定圆盘的中部设有顶部插销，所述上水孔压盘与下水孔压盘的底面中心设有插销孔，下水孔压盘的底插销孔对准底座插销安装在旋转底座内，上水孔压盘 的底插销孔对准顶部插销安装在固定圆盘内，所述的两根支撑杆对称分布在旋转底座的两侧，支撑杆的底端固定在旋转底座上，支撑杆的上部固定在固定圆盘上。 Rotating base, fixed disc and two support rods, the middle part of the rotating base is provided with a base pin, the middle part of the fixed disc is provided with a top pin, and the center of the bottom surface of the pressure plate of the upper water hole and the pressure plate of the lower water hole is provided with The pin hole, the bottom pin hole of the lower water hole pressure plate is aligned with the base pin and installed in the rotating base, the bottom pin hole of the upper water hole pressure plate is aligned with the top pin and installed in the fixed disc, and the two support rods are symmetrically distributed On both sides of the rotating base, the bottom end of the supporting rod is fixed on the rotating base, and the upper part of the supporting rod is fixed on the fixed disc.
本实用新型采用AB胶6粘合岩石试件5与热塑管7、用胶带8和铁丝9紧固实现试件的密封。AB胶即环氧胶黏剂与固化剂的简称，因为环氧树脂含有多种极性基团和活性很大的环氧基，能与岩石，塑料等多种材料形成很强的粘结力，胶结强度高。环氧树脂加入填料后体积收缩率在0.2％以下，环氧固化物的线胀系数也很小。胶层的尺寸稳定性好。环氧胶黏剂与固化剂质量按3∶2的比例调配好之后，能够配制成耐高温、韧性好的固化体系，最适于不同温度下的温度—渗流—应力耦合作用试验。岩石试件5可选用直径50mm，长度为100mm的圆柱形茅口灰岩 The utility model adopts AB glue 6 to bond the rock test piece 5 and the thermoplastic pipe 7, and fasten with the adhesive tape 8 and the iron wire 9 to realize the sealing of the test piece. AB glue is the abbreviation of epoxy adhesive and curing agent, because epoxy resin contains a variety of polar groups and highly active epoxy groups, which can form a strong bond with rocks, plastics and other materials , high bonding strength. After the epoxy resin is added with fillers, the volume shrinkage rate is below 0.2%, and the linear expansion coefficient of the epoxy cured product is also very small. The dimensional stability of the adhesive layer is good. After the quality of epoxy adhesive and curing agent is adjusted according to the ratio of 3:2, it can be formulated into a curing system with high temperature resistance and good toughness, which is most suitable for the temperature-seepage-stress coupling test at different temperatures. Rock specimen 5 can be a cylindrical Maokou limestone with a diameter of 50mm and a length of 100mm
本实用新型的安装步骤是：如图1所示，将岩石试件5外表面均匀涂抹AB胶6；用白色胶带8分别缠绕上水孔压盘1和下水孔压盘2的管状顶部；将下水孔压盘2的插销孔对准底座插销12安装在底座13内；将岩石试件5安放在下水孔压盘2的顶部开口上并套上热塑管7；上水孔压盘1的顶部开口也套入热塑管7内；对准顶部插销14套上固定圆盘15；旋转底座13，用吹风机加热热塑管7，使之加热收缩，完美贴合岩石试件5；将热塑管7外用白色胶带8缠绕，在用铁丝9拧紧，进一步密封；安装轴向位移引伸计10和环向位移引伸计11。 The installation steps of the present utility model are: as shown in Figure 1, evenly smear AB glue 6 on the outer surface of the rock test piece 5; Wrap the tubular top of the upper water hole pressure plate 1 and the lower water hole pressure plate 2 with white adhesive tape 8; The pin hole of the downhole pressure plate 2 is aligned with the base pin 12 and installed in the base 13; the rock specimen 5 is placed on the top opening of the downhole pressure plate 2 and covered with a thermoplastic tube 7; the upper water hole pressure plate 1 The top opening is also inserted into the thermoplastic tube 7; the top pin 14 is aligned with the fixed disc 15; the base 13 is rotated, and the thermoplastic tube 7 is heated with a blower to make it heat shrinkable and perfectly fit the rock specimen 5; Plastic pipe 7 is externally wound with white adhesive tape 8, and then tightened with iron wire 9 to further seal; axial displacement extensometer 10 and circumferential displacement extensometer 11 are installed.
将上述装置安装完毕后，待12小时AB胶凝结后，双手托住下水孔压盘2放入试验机内，如图3所示，试验机上设有出油口18和进油口19，在进水孔3、出水孔4分别安装进水管和出水管；将三轴腔缓慢放下，形成密闭的实验空间；往三轴腔内注入硅油，通过油泵对岩石试件5施加预定的均匀围压；之后油泵 通过座动缸施加轴向压力；对上水孔压盘1、下水孔压盘2施加不同的渗透压力，使得岩石试件5上下界面形成渗透压力差，从而进行渗流；通过三轴腔外的三个环形加热圈16，并通过三轴腔内温度传感器17实时监测温度，达到预定实验温度；最后通过数据采集系统中的轴向位移引伸计10、环向位移引伸计11和温度传感器17的数据，实现对岩石的径向位移、环向形变、渗透压力差这些数据的实时采集。 After the installation of the above-mentioned device is completed, after 12 hours the AB glue has solidified, hold the pressure plate 2 of the water hole with both hands and put it into the testing machine, as shown in Figure 3, the testing machine is provided with an oil outlet 18 and an oil inlet 19. The water inlet 3 and the water outlet 4 are respectively installed with water inlet and outlet pipes; the triaxial cavity is slowly lowered to form a closed experimental space; silicon oil is injected into the triaxial cavity, and a predetermined uniform confining pressure is applied to the rock specimen 5 through the oil pump ; After that, the oil pump applies axial pressure through the seat moving cylinder; different osmotic pressures are applied to the pressure plate 1 of the upper water hole and the pressure plate 2 of the lower water hole, so that the upper and lower interfaces of the rock specimen 5 form a osmotic pressure difference, thereby performing seepage; There are three annular heating rings 16 outside the chamber, and the temperature is monitored in real time by a triaxial temperature sensor 17 in the chamber to reach the predetermined experimental temperature; finally, through the axial displacement extensometer 10, the circumferential displacement extensometer 11 and the temperature in the data acquisition system The data from the sensor 17 realizes real-time collection of data such as radial displacement, circumferential deformation, and osmotic pressure difference of the rock.
图4为20℃下热塑管与岩石试件之间未采用AB胶粘合的渗流压力差与时间图，由于没有使用AB胶粘合试件与热塑管，侧隙极易贯通；从图中我们可以看出岩石渗流时间不到2分钟，且渗透压力差(Detta Pressure)下降速度极快，由此推测水流是从侧隙形成通路，造成渗流假象； Fig. 4 is a diagram of the seepage pressure difference and time between the thermoplastic pipe and the rock specimen without AB glue bonding at 20 °C. Since the specimen and the thermoplastic pipe are not bonded with AB glue, the side gap is easy to penetrate; from From the figure, we can see that the seepage time of the rock is less than 2 minutes, and the seepage pressure difference (Detta Pressure) drops extremely fast, so it is inferred that the water flow forms a channel from the side gap, causing the false seepage;
图5为20℃下采用AB胶粘合了热塑管和岩石试件的渗流压力差与时间图，采用AB胶粘合试件热塑管后，侧隙通路被彻底封堵，水流只能从岩石试件内部渗流，且渗流速度较慢，符合工程实际，宏观上表现为渗流时间长达3小时，证明这种温度‐渗流耦合试验试件密封装置及方法切实有效。 Figure 5 is a diagram of the seepage pressure difference and time of the thermoplastic pipe and the rock specimen bonded with AB glue at 20°C. After the thermoplastic pipe of the specimen was bonded with AB glue, the side gap passage was completely blocked, and the water flow could only Seepage from the inside of the rock specimen, and the seepage speed is relatively slow, which is in line with engineering practice. Macroscopically, the seepage time is as long as 3 hours, which proves that this temperature-seepage coupling test specimen sealing device and method are effective.
图6为40℃下采用AB胶粘合了热塑管和岩石试件的渗流压力差与时间图，采用AB胶粘合试件热塑管后，侧隙通路被彻底封堵，水流只能从岩石试件内部渗流，且渗流速度较慢，符合工程实际，宏观上表现为渗流时间长达3小时左右，证明这种温度‐渗流耦合试验试件密封装置及方法在40℃切实有效。 Fig. 6 is a diagram of the seepage pressure difference and time of the thermoplastic pipe and the rock specimen bonded with AB glue at 40°C. After the thermoplastic pipe of the specimen is bonded with AB glue, the side gap passage is completely blocked, and the water flow can only Seepage from the inside of the rock specimen, and the seepage speed is relatively slow, which is in line with engineering practice. Macroscopically, the seepage time is as long as about 3 hours, which proves that this temperature-seepage coupling test specimen sealing device and method are effective at 40°C.
图7为60℃下采用AB胶粘合了热塑管和岩石试件的渗流压力差与时间图，采用AB胶粘合试件热塑管后，侧隙通路被彻底封堵，水流只能从岩石试件内部渗流，且渗流速度较慢，符合工程实际，宏观上表现为渗流时间长达200分钟左右，证明这种温度‐渗流耦合试验试件密封装置及方法在60℃依旧切实有效。 Fig. 7 is a diagram of the seepage pressure difference and time of the thermoplastic pipe and the rock specimen bonded with AB glue at 60°C. After the thermoplastic pipe of the specimen is bonded with AB glue, the side gap passage is completely blocked, and the water flow can only Seepage from the inside of the rock specimen, and the seepage speed is relatively slow, which is in line with engineering practice. Macroscopically, the seepage time is as long as about 200 minutes, which proves that the sealing device and method of the temperature-seepage coupling test specimen are still effective at 60°C.
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Cited By (8)
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| CN105092385A (en) * | 2015-08-06 | 2015-11-25 | 山东科技大学 | High-pressure water sealing device for rock sample and use method |
| CN105388098A (en) * | 2015-12-20 | 2016-03-09 | 湖南科技大学 | Rock fracture preparation and seepage device and seepage characteristic test method |
| CN105891082A (en) * | 2015-12-19 | 2016-08-24 | 湖南科技大学 | Rock permeability coefficient detection device and method |
| CN105928859A (en) * | 2016-07-08 | 2016-09-07 | 中国地质大学（武汉） | Device and method for testing rock fracture seepage parameters under high temperature and high pressure conditions |
| CN108693047A (en) * | 2018-03-29 | 2018-10-23 | 大连理工大学 | A kind of sealing device of rock fracture shearing Seepage Experiment |
| CN110387204A (en) * | 2019-07-10 | 2019-10-29 | 中国地质大学（武汉） | Nano-scale high-porosity rock seepage test sealant |
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| CN105092385A (en) * | 2015-08-06 | 2015-11-25 | 山东科技大学 | High-pressure water sealing device for rock sample and use method |
| CN105092385B (en) * | 2015-08-06 | 2018-01-26 | 山东科技大学 | A rock sample high-pressure water sealing device and its application method |
| CN105891082A (en) * | 2015-12-19 | 2016-08-24 | 湖南科技大学 | Rock permeability coefficient detection device and method |
| CN105891082B (en) * | 2015-12-19 | 2019-07-26 | 湖南科技大学 | Device and method for detecting rock permeability coefficient |
| CN105388098A (en) * | 2015-12-20 | 2016-03-09 | 湖南科技大学 | Rock fracture preparation and seepage device and seepage characteristic test method |
| CN105388098B (en) * | 2015-12-20 | 2018-01-02 | 湖南科技大学 | A kind of test method produced with seepage apparatus and seepage characteristic of rock fracture |
| CN105928859A (en) * | 2016-07-08 | 2016-09-07 | 中国地质大学（武汉） | Device and method for testing rock fracture seepage parameters under high temperature and high pressure conditions |
| CN108693047A (en) * | 2018-03-29 | 2018-10-23 | 大连理工大学 | A kind of sealing device of rock fracture shearing Seepage Experiment |
| CN110387204A (en) * | 2019-07-10 | 2019-10-29 | 中国地质大学（武汉） | Nano-scale high-porosity rock seepage test sealant |
| CN111189754A (en) * | 2020-01-07 | 2020-05-22 | 重庆大学 | Device for testing permeability parameters of broken rock |
| CN112284901A (en) * | 2020-10-28 | 2021-01-29 | 贵州大学 | A kind of false triaxial rock testing machine and using method thereof |
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