CN203929474U - A kind of pilot system of quick saturated loess sample - Google Patents

A kind of pilot system of quick saturated loess sample Download PDF

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Publication number
CN203929474U
CN203929474U CN201420361999.8U CN201420361999U CN203929474U CN 203929474 U CN203929474 U CN 203929474U CN 201420361999 U CN201420361999 U CN 201420361999U CN 203929474 U CN203929474 U CN 203929474U
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China
Prior art keywords
sample
pilot
base
pressure
drainpipe
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Expired - Fee Related
Application number
CN201420361999.8U
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Chinese (zh)
Inventor
马林
申俊敏
张军
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Shanxi Province Transport Science Research Institute
Shanxi Jiaoke Highway Survey and Design Institute
Original Assignee
Shanxi Province Transport Science Research Institute
Shanxi Jiaoke Highway Survey and Design Institute
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Priority to CN201420361999.8U priority Critical patent/CN203929474U/en
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Publication of CN203929474U publication Critical patent/CN203929474U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model relates to a kind of pilot system of quick saturated loess sample.It comprises top cover, pressure shield, base, piston, sample cap, sample rubber membrane, upper drainpipe, sensor for pore water pressure, lower drainpipe, vacuum air pump, confined pressure system, external water source; In described pressure shield, be covered with top cover, the lower chimeric base that has, forms triaxial cell altogether; Described piston is arranged on top cover central authorities; Described sample cap is placed in the top of rubber membrane, is connected to the conduit I from base pass-out on it; In the T-valve I of described conduit I outer termination drainpipe and sensor for pore water pressure on being connected to; Described sample rubber membrane below is connected to the conduit II from base pass-out, and described conduit II outer termination is being connected in the T-valve II of lower drainpipe and vacuum air pump; Described base is also connected to the T-valve III being connected with external water source with confined pressure system.Compared with prior art, pilot system described in the utility model is easy to operate, and data are reliable, applicable to indoor saturated soil test.

Description

A kind of pilot system of quick saturated loess sample
Technical field
The utility model belongs to civil engineering work soil test device technique field, specifically, relates to a kind of pilot system of quick saturated loess sample.
Background technology
Saturated soil sample preparation method mainly contains vacuum suction saturation method and back pressure saturation method at present.The saturation method of wherein bleeding is first soil sample to be carried out to vacuum suction processing, makes in soil sample hole in low pressure, then to soil sample immersion, makes soil sample hole enter state of saturation with water filling.Bleed saturation method because of its saturation degree compared with high, the scope of application compared with being extensively widely adopted.But its shortcoming showing also can not be ignored, in process of the test, because vacuum reservoir volume is larger, bleed and need the long period, very strict to the seal request of top cover and cylinder body; Existing vacuum reservoir is substantially all opaque steel, easily makes, when vacuumizing, the water in cylinder is sucked to air pump oil pump, damages air pump.Concerning testing crew, a maximum difficulty is exactly that soil sample is difficult to take out dress sample after saturated, because soil sample is extremely soft, cannot directly install.
Back-pressure is saturated has solved the difficulty that the saturation method of bleeding is installed sample after sample preparation finishes.Its thinking is by pressing (back-pressure) to bring up to a certain degree in hole, and the residual air in soil sample is dissolved in and in water, realizes the saturated of soil sample.When increasing hole pressure (back-pressure), confined pressure also increases simultaneously, and soil sample is kept to an effective confining pressure, with confined pressure increment and its hole causing, presses the ratio of increment to reflect the saturated conditions of soil sample.But the speed of its saturated soil sample is slower, and efficiency is lower.Therefore also only in the situation that soil sample hole is larger, adopt this method.
Summary of the invention
For solving the problems of the technologies described above, the utility model provides a kind of pilot system of easy and simple to handle, quick saturated loess sample that precision is higher.
The pilot system of quick saturated loess sample described in the utility model, described pilot system comprises top cover 1, pressure shield 2, base 3, piston 4, sample cap 5, sample rubber membrane 6, upper drainpipe 8, sensor for pore water pressure 9, lower drainpipe 11, vacuum air pump 12, confined pressure system 13, external water source 14; In described pressure shield 2, be covered with top cover 1, the lower chimeric base 3 that has, forms triaxial cell altogether; Described piston 4 is arranged on top cover 1 central authorities; Sample is fixed on base 3 bottoms, and sample rubber membrane 6 seals sample; Described sample cap 5 is placed in the top of rubber membrane 6, is connected to from the conduit I 71 of base 3 pass-outs on it; In the T-valve I 101 of described conduit I 71 outer termination drainpipe 8 and sensor for pore water pressure 9 on being connected to; Described sample rubber membrane 6 belows are connected to from the conduit II 72 of base 3 pass-outs, and described conduit II 72 outer termination are being connected in the T-valve II 102 of lower drainpipe 11 and vacuum air pump 12; Described base 3 is also connected to the T-valve III 103 being connected with external water source 14 with confined pressure system 13.
The pilot system of quick saturated loess sample described in the utility model, described top cover 1 is also provided with vent port.
The pilot system of quick saturated loess sample described in the utility model, described vacuum air pump 12 force value are less than 600Pa.
The pilot system of quick saturated loess sample described in the utility model, the model of described T-valve is the stainless-steel tube that can block external diameter 3mm.
The pilot system of quick saturated loess sample described in the utility model in use, the saturated one side of soil sample is, by pressure, distilled water is pressed into soil sample from upper drainpipe, by connecting the vacuum air pump of lower drainpipe, the gas in soil sample to be extracted out on the other hand, make soil sample keep negative pressure, improve the pore water pressure of the soil body.Water is when entering the soil body, and due to the effect of suction, flowing velocity is significantly accelerated, and saturation time significantly reduces, and saturation degree enlarges markedly, and has greatly improved efficiency and the precision of test.
Compared with prior art, the pilot system of quick saturated loess sample described in the utility model is easy to operate, and data are reliable, applicable to indoor saturated soil test.
Accompanying drawing explanation
Fig. 1: the test system architecture schematic diagram of quick saturated loess sample; Drainpipe, 12-vacuum air pump, 13-confined pressure system, 14-external water source under 1-top cover, 2-pressure shield, 3-base, 4-piston, 5-sample cap, 6-sample rubber membrane, 71-conduit I, 72-conduit II, the upper drainpipe of 8-, 9-sensor for pore water pressure, 101-T-valve I, 102-T-valve II, 103-T-valve III, 11-.
Embodiment
Below in conjunction with specific embodiment, the pilot system of quick saturated loess sample described in the utility model is described further, but protection domain of the present utility model is not limited to this.
Embodiment 1
A pilot system for quick saturated loess sample, described pilot system comprises top cover 1, pressure shield 2, base 3, piston 4, sample cap 5, sample rubber membrane 6, upper drainpipe 8, sensor for pore water pressure 9, lower drainpipe 11, vacuum air pump 12, confined pressure system 13, external water source 14; In described pressure shield 2, be covered with top cover 1, the lower chimeric base 3 that has; Described piston 4 is arranged on top cover 1 central authorities; Sample is fixed on base 3 bottoms, and sample rubber membrane 6 seals sample; Described sample cap 5 is placed in the top of rubber membrane 6, is connected to from the conduit I 71 of base 3 pass-outs on it; In the T-valve I 101 of described conduit I 71 outer termination drainpipe 8 and sensor for pore water pressure 9 on being connected to; Described sample rubber membrane 6 belows are connected to from the conduit II 72 of base 3 pass-outs, and described conduit II 72 outer termination are being connected in the T-valve II 102 of lower drainpipe 11 and vacuum air pump 12; Described base 3 is also connected to the T-valve III 103 being connected with external water source 14 with confined pressure system 13; Described triaxial cell top cover 1 is also provided with vent port; Described vacuum air pump 12 force value are 500Pa; The model of described T-valve is the stainless-steel tube that can block external diameter 3mm.
For the effect of the pilot system of quick saturated loess sample described in the utility model is described, adopt the conventional pilot system of the saturation method of bleeding and the pilot system of back pressure saturation method to compare, soil sample to three batches of separate sources is all measured, by test, obtain under three kinds of test methods the saturated conditions of soil sample separately, the results are shown in Table 1:
The saturated comparative analysis of soil sample under three kinds of test methods of table 1
The pilot system of quick saturated loess sample described in the utility model in use, the saturated one side of soil sample is, by pressure, distilled water is pressed into soil sample from upper drainpipe, by connecting the vacuum air pump of lower drainpipe, the gas in soil sample to be extracted out on the other hand, make soil sample keep negative pressure, improve the pore water pressure of the soil body.Water is when entering the soil body, and due to the effect of suction, flowing velocity is significantly accelerated, and saturation time significantly reduces, and saturation degree enlarges markedly, and has greatly improved efficiency and the precision of test.
Compared with prior art, the pilot system of quick saturated loess sample described in the utility model is easy to operate, and data are reliable, applicable to indoor saturated soil test.

Claims (4)

1. the pilot system of a quick saturated loess sample, it is characterized in that, described pilot system comprises top cover (1), pressure shield (2), base (3), piston (4), sample cap (5), sample rubber membrane (6), upper drainpipe (8), sensor for pore water pressure (9), lower drainpipe (11), vacuum air pump (12), confined pressure system (13), external water source (14); In described pressure shield (2), be covered with top cover (1), the lower chimeric base (3) that has, forms triaxial cell altogether; Described piston (4) is arranged on top cover (1) central authorities; Sample is fixed on base (3) bottom, and sample rubber membrane (6) seals sample; Described sample cap (5) is placed in the top of sample rubber membrane (6), is connected to from the conduit I (71) of base (3) pass-out on it; In the T-valve I (101) of described conduit I (71) outer termination drainpipe (8) and sensor for pore water pressure (9) on being connected to; Described sample rubber membrane (6) below is connected to from the conduit II (72) of base (3) pass-out, and described conduit II (72) outer termination is being connected in the T-valve II (102) of lower drainpipe (11) and vacuum air pump (12); Described base (3) is also connected to the T-valve III (103) being connected with external water source (14) with confined pressure system (13).
2. the pilot system of a kind of quick saturated loess sample according to claim 1, is characterized in that, described top cover (1) is also provided with vent port.
3. the pilot system of a kind of quick saturated loess sample according to claim 1, is characterized in that, described vacuum air pump (12) force value is less than 600Pa.
4. the pilot system of a kind of quick saturated loess sample according to claim 1, is characterized in that, the model of described T-valve is the stainless-steel tube that can block external diameter 3mm.
CN201420361999.8U 2014-07-01 2014-07-01 A kind of pilot system of quick saturated loess sample Expired - Fee Related CN203929474U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106018741A (en) * 2016-05-24 2016-10-12 山西省交通科学研究院 Novel three-axis soil sample body change measuring device and measuring method
CN106568891A (en) * 2016-10-12 2017-04-19 河海大学 Testing device used for rock-like sample batch positive pressure water saturation, and application method thereof
CN106826211A (en) * 2017-01-09 2017-06-13 绍兴文理学院 The electric erection equipment and its application method of a kind of triaxial test sealing ring
CN106826210A (en) * 2017-01-09 2017-06-13 绍兴文理学院 The erecting device of dual control up and down and its application method of a kind of triaxial test sealing ring
WO2018068382A1 (en) * 2016-10-12 2018-04-19 河海大学 Test device for performing positive-pressure water saturation on high-strength rock samples, and use method therefor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106018741A (en) * 2016-05-24 2016-10-12 山西省交通科学研究院 Novel three-axis soil sample body change measuring device and measuring method
CN106568891A (en) * 2016-10-12 2017-04-19 河海大学 Testing device used for rock-like sample batch positive pressure water saturation, and application method thereof
WO2018068382A1 (en) * 2016-10-12 2018-04-19 河海大学 Test device for performing positive-pressure water saturation on high-strength rock samples, and use method therefor
WO2018068381A1 (en) * 2016-10-12 2018-04-19 河海大学 Test device for performing positive-pressure water saturation on rock-like samples in a batch mode, and use method therefor
CN106826211A (en) * 2017-01-09 2017-06-13 绍兴文理学院 The electric erection equipment and its application method of a kind of triaxial test sealing ring
CN106826210A (en) * 2017-01-09 2017-06-13 绍兴文理学院 The erecting device of dual control up and down and its application method of a kind of triaxial test sealing ring

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20141105

Termination date: 20190701