CN202133659U - Experimental device for monitoring swelling-shrinkage deformation of deep soil under influence of hot rainy weather - Google Patents

Experimental device for monitoring swelling-shrinkage deformation of deep soil under influence of hot rainy weather Download PDF

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Publication number
CN202133659U
CN202133659U CN201120221029U CN201120221029U CN202133659U CN 202133659 U CN202133659 U CN 202133659U CN 201120221029 U CN201120221029 U CN 201120221029U CN 201120221029 U CN201120221029 U CN 201120221029U CN 202133659 U CN202133659 U CN 202133659U
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China
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sinker
reinforcing rod
dial gauge
support
soil
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CN201120221029U
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Chinese (zh)
Inventor
张先伟
孔令伟
郭爱国
王勇
刘观仕
李新明
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中国科学院武汉岩土力学研究所
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Abstract

The utility model provides a simulated experimental device for monitoring swelling-shrinkage deformation of deep soil under the influence of hot rainy weather. The experimental device mainly comprises a model tank, a water receiving table, a watering port, a reflective electric heater, dial indicators and sedimentation pieces, and adopts the principle that a watering device and a heater are jointly used for humidifying, drying and evaporating the sample soil so as to simulate the hot rainy weather indoors; and the sedimentation pieces are arranged in the soil of different areas and depths in the experimental tank, and the dial indicators are arranged on the sedimentation pieces in a bridging manner so as to measure the swelling-shrinkage deformation of the deep soil. The experimental device provided by the utility model is a large-scale simulated experimental device, can continuously and dynamically monitor the non-uniform swelling-shrinkage deformation of the deep soil, and has the advantages that the influence of the outside environment on the experimental result is reduced, the reliability of the monitoring result is improved, and the operation is simple.

Description

Burning hot and rainy climate effect is the experimental provision of monitoring deep soil body swell-shrinking deformation down
Technical field
The utility model belongs to the monitoring test device of the soil body in Geotechnical Engineering and engineering geology field, is specifically related to the rainy hot climate influence of a kind of lab simulation test unit of the large scale of monitoring deep soil body swell-shrinking deformation down.Its advantage is to have reduced the influence of external environment to experimental result, has improved the fiduciary level of monitoring result, and is simple to operate.
Background technology
Some soil body (like fissured clay, swelled ground, laterite etc.) is responsive especially to climate change; The cyclical variation of inside soil body moisture generation drying and watering cycle under the effect of rainfall and evaporation; Inhomogeneous breathing meeting makes the soil body produce the unordered crack of breaking in this process; Generate moderate finite deformation, destroy serious building foundation and slope stability.Therefore, study the rainy hot climate influence soil body swell-shrinking deformation rule important that just seems down.
Because the field condition test involves great expense and receives surrounding environment influence remarkable, adopts shop experiment for the research in this field at present more.The expansion of the soil that China's Standard for test methods of earthworks (GB/T 50123-1999) is mentioned and shrinkage test are to use more test method at present; The test unit diameter that this method adopts is 61.8mm or 79.8mm; It highly is the cutting ring of 20mm; Utilize this small scale test unit to obtain the result and actual conditions have than large deviation, the only displacement of soil sample among a small circle in the energy measurement cutting ring of this method simultaneously can't be measured inhomogeneous swell-shrinking deformation.For this reason; The Chen Liang of Hohai University etc. has invented a kind of monitoring method (patent No.: CN200910026062.9) of growth of soil mass crack; Though the test unit of mentioning in the method can be monitored soil body swell-shrinking deformation in the large scale spatial dimension; But only can realize monitoring, can't monitor the distortion that causes by the crack to growth of soil mass crack.The life Tang Dynasty waits at document (the life Tang Dynasty, Shi Bin, Liu Chun, Wang Baojun.Influence the factor and the quantitative test of cohesive soil surface desciccation crack structural form.The water conservancy journal, 2007,38 (10); 1186-1193) soil sample is mixed with the rectangular parallelepiped glass jar that mud is put into 16cm * 16cm * 3cm; Put into the dehydration of baking oven freeze-day with constant temperature then, adopt computing machine picture treatment technology to analyze the law of development of clay surface desciccation crack, and then inquired into the dry-shrinkage deformed rule that influenced by it; But utilize the glass jar of this rectangular parallelepiped only can can't obtain the deformation rule of the deep soil body to the research in soil body surface crack.
To sum up visible; The use of experimental provision that is used for soil body swell-shrinking deformation monitoring at present is unsatisfactory; For this reason, the experimental provision of the swell-shrinking deformation of the soil body that must a kind of brand-new large scale measurement range of exploitation the more important thing is; The experimental enviroment that device can provide should match with drouth rainfall and the basic down generation disease of rainy hot climate actual condition, and should be able to measure the inhomogeneous swell-shrinking deformation of the deep soil body.Ground processing and design and Analysis of Slope Stability that the test findings of utilizing this device to obtain can be China's southern area provide theoretical foundation and technical support.
Summary of the invention
The purpose of the utility model has been to propose a kind of rainy hot climate influence experimental provision of monitoring deep soil body swell-shrinking deformation down of simulating, and its advantage is to have reduced the influence of external environment to experimental result, has improved the fiduciary level of monitoring result, and is simple to operate.
For realizing above-mentioned purpose, adopt following technical scheme:
A kind of rainy hot climate influence experimental provision of monitoring deep soil body swell-shrinking deformation down of simulating comprises model groove, water receiving stand, watering pot, reflection-type electric heater, first dial gauge, first sinker, it is characterized in that:
Link model groove on the water receiving stand, the model groove have a leaking hole, the water receiving stand both sides are put first respectively and are set up platform, second and set up platform, first and set up the platform top and set up watering pot, second sets up the platform top sets up the reflection-type electric heater.
Be welded with first reinforcing rod, second reinforcing rod, the 3rd reinforcing rod, the 4th reinforcing rod, the 5th reinforcing rod, the 6th reinforcing rod on first support; First mid-stent is provided with screw and screws in mouth.
The first support integral body is placed on model groove top, and fixes with clamping plate.
First dial gauge is set up in the first reinforcing rod bottom, and the gauge rod of first dial gauge is placed on the Upper gasket of first sinker, and first sinker is connected to form through pitman by Upper gasket and lower gasket; Pitman and lower gasket are imbedded in the soil body.
The positional structure relation of second reinforcing rod and second dial gauge and second sinker is with the positional structure relation of first reinforcing rod and first dial gauge and first sinker.
Equally, the structure of the 3rd reinforcing rod and second dial gauge and second sinker, the 4th reinforcing rod and the 4th dial gauge and the 4th sinker, the 5th reinforcing rod and the 5th dial gauge and the 5th sinker, the 6th reinforcing rod and the 6th dial gauge and the 6th sinker is all the same.
The structure of second sinker, the 3rd sinker, the 4th sinker, the 5th sinker, the 6th sinker is all with first sinker.
The one-piece construction of second support and the 3rd support is all with first support, and first support, second support, the 3rd support three screw in a mouthful connection through the screw DRIVE SCREWS.
Described model groove is a steel, and the diameter of bottom leaking hole is 0.2cm, and pitch of holes is 1cm.
Described water receiving stand is high 4cm, the steel vessel of diameter 1.2m.
The principle of the utility model experimental provision is: adopt water sprinkler and well heater to unite soil sample is implemented humidification and oven dry evaporation process, at the rainy hot climate of lab simulation.Inside soil body through at diverse location is buried sinker underground, because the bottom and the soil body contact area of sinker are bigger, the soil body is when swell-shrinking deformation takes place, and sinker also can corresponding generation displacement.Displacement can measure through the dial gauge that set up on sinker top, any time the reading reading that deducts when beginning experiment dial gauge of dial gauge be soil body swell-shrinking deformation value this moment.
Compared with prior art, the utlity model has following advantage and beneficial effect:
What test was adopted is on the large scale test groove, to carry out, and has reduced the size effect between shop experiment and actual condition, and the data result reliability obviously improves; A kind of lab simulation drouth rainfall and the test method of rainy hot climate are provided, and this method is simple to operate; Through burying sinker underground at the zones of different different depth, set up dial gauge above that and monitor the soil deformation situation, can carry out continuously dynamic monitoring to the inhomogeneous swell-shrinking deformation of inside soil body, reduced artificial and the influence of external environment to testing.
Description of drawings
Fig. 1 is the utility model test unit one-piece construction synoptic diagram;
Fig. 2 is the front view of bottom water receiving stand;
Fig. 3 is a model trench bottom vertical view;
Fig. 4 is the structural map of sinker;
Fig. 5 support front view;
Fig. 6 support vertical view;
Fig. 7 clamping plate organigram;
Position, Fig. 8 monitoring point arrangenent diagram.
Among the figure: 1-model groove; 2a-first support; 2b-second support; 2c-the 3rd support; 3a-first sets up platform; 3b-second sets up platform; The 4-water receiving stand; The 5-watering pot; 6-reflection-type electric heater; 7a-first dial gauge; 7b-second dial gauge; 7c-the 3rd dial gauge; 7d-the 4th dial gauge; 7e-the 5th dial gauge; 7f-the 6th dial gauge; 8a-first sinker; 8b-second sinker; 8c-the 3rd sinker; 8d-the 4th sinker; 8e-the 5th sinker; 8f-the 6th sinker; The 9-leaking hole; The 10a-Upper gasket; The 10b-lower gasket; The 11-pitman; The 12-screw; The 13-screw screws in mouth; 14a-first reinforcing rod; 14b-second reinforcing rod; 14c-the 3rd reinforcing rod; 14d-the 4th reinforcing rod; 14e-the 5th reinforcing rod; 14f-the 6th reinforcing rod; The 15-clamping plate.
Embodiment
Below in conjunction with accompanying drawing a novel embodiment of this use is done further description:
A kind of rainy hot climate influence experimental provision of monitoring deep soil body swell-shrinking deformation down of simulating comprises model groove 1, water receiving stand 4, watering pot 5, reflection-type electric heater 6, the first dial gauge 7a, the first sinker 8a, it is characterized in that:
Link model groove 1 on the water receiving stand 4, model groove 1 have a leaking hole 9, water receiving stand 4 both sides are put first respectively and are set up platform 3a, second and set up platform 3b, first and set up platform 3a top and set up watering pot 5, the second and set up platform 3b top and set up reflection-type electric heater 6.
Be welded with the first reinforcing rod 14a, the second reinforcing rod 14b, the 3rd reinforcing rod 14c, the 4th reinforcing rod 14d, the 5th reinforcing rod 14e, the 6th reinforcing rod 14f on the first support 2a; First support 2a middle part is provided with screw and screws in mouth 13.
The first support 2a integral body is placed on model groove 1 top, and fixing with clamping plate 15.
The first dial gauge 7a is set up in the first reinforcing rod 14a bottom, and the gauge rod of the first dial gauge 7a is placed on the Upper gasket 10a of the first sinker 8a, and the first sinker 8a is connected to form through pitman 11 by Upper gasket 10a and lower gasket 10b; Pitman 11 and lower gasket 10b imbed in the soil body.
The positional structure relation of the second reinforcing rod 14b and the second dial gauge 7b and the second sinker 8a is with the positional structure relation of the first reinforcing rod 14a and the first dial gauge 7a and the first sinker 8a.
Equally, the structure of the 3rd reinforcing rod 14c and the second dial gauge 7c and the second sinker 8c, the 4th reinforcing rod 14d and the 4th dial gauge 7d and the 4th sinker 8d, the 5th reinforcing rod 14e and the 5th dial gauge 7e and the 5th sinker 8e, the 6th reinforcing rod 14f and the 6th dial gauge 7f and the 6th sinker 8f is all the same.
The structure of the second sinker 8b, the 3rd sinker 8c, the 4th sinker 8d, the 5th sinker 8e, the 6th sinker 8f is all with the first sinker 8a.
The one-piece construction of the second support 2b and the 3rd support 2c is all with the first support 2a, and the first support 2a, the second support 2b, the 3rd support 2c three screw in mouthful 13 connections through screw 12 DRIVE SCREWSs.
Described model groove 1 is a steel, and the diameter of bottom leaking hole 9 is 0.2cm, and pitch of holes is 1cm.
Described water receiving stand 4 is high 4cm, the steel vessel of diameter 1.2m.
A kind of rainy hot climate influence monitoring method of deep soil body swell-shrinking deformation down of simulating the steps include:
1, assembling instrument
Shown in accompanying drawing 1, place water receiving stand 4 in smooth broad place, steel model groove 1 is placed on the water receiving stand 4.Because model groove 1 size is bigger, the water yield that humidification is sprayed is more, and the water receiving stand volume of bottom is unsuitable too small, adopts high 4cm, the cylindrical steel container made of diameter 1.2m.Guarantee model groove 1 and water receiving stand 4 center-aligned, the fastness of inspection apparatus installation simultaneously prevents instrument run-off the straight in the experimentation, influences the monitoring result precision.(seeing accompanying drawing 2) put first and set up platform 3a and second and set up platform 3b on water receiving stand 4 both sides; First sets up platform 3a top sets up watering pot 5; Second sets up platform 3b top sets up reflection-type electric heater 6, and the height of watering pot 5 and reflection-type electric heater 6 is apart from model groove top end surface 20cm.
2, dress appearance
Because soil sample thickness is bigger, for accelerating its seepage velocity, quicken the oven dry evaporation process, be provided with leaking hole 9 (accompanying drawing 3) in model groove 1 bottom, leaking hole diameter 0.2cm, pitch of holes 1cm.The preceding flour sand layer of spreading thick 0.1m in model groove 1 bottom of dress appearance perhaps replaces the flour sand layer with permeable stone.Soil sample is fetched after pulverize air-dry back, cross the 2mm sieve, record water percentage and density.With wind desiceted soil by the water percentage of natural soil sample and density proportioning good after, in layering paving mode placement model groove 1.After model groove 1 is filled, whether smoothly need with air-bubble level inspection soil body surface, with model groove 1 sealing and standing 24 hours, it was fixed to make it to obtain preliminary sedimentation then.
3, install and measure system
Need simultaneously the sinker (accompanying drawing 4) that is used for monitoring distortion is installed simultaneously dress appearance, the position of burying underground, monitoring point is shown in accompanying drawing 8, and pad 10a top connects dial gauge, and pad 10b is embedded in inside soil body.The pad 10b depth of burying on the first support 2a is according to soil sample surface 0m; The pad 10b depth of burying on the second support 2b is according to soil sample surface 0.2m; The pad 10b depth of burying on the 3rd support 2c is according to soil sample surface 0.35m.It should be noted that the necessary level of burying underground of sinker, otherwise the soil deformation value that obtains can produce certain error.
Be welded with the first reinforcing rod 14a, the second reinforcing rod 14b, the 3rd reinforcing rod 14c, the 4th reinforcing rod 14d, the 5th reinforcing rod 14e, the 6th reinforcing rod 14f on the first support 2a; First support 2a middle part is provided with screw and screws in mouth 13; The first support 2a integral body is placed on model groove 1 top, and fixing with clamping plate 15; The first dial gauge 7a is set up in the first reinforcing rod 14a bottom, and the gauge rod of the first dial gauge 7a is placed on the Upper gasket 10a of the first sinker 8a, and the first sinker 8a is connected to form through pitman 11 by Upper gasket 10a and lower gasket 10b; Pitman 11 and lower gasket 10b imbed in the soil body; The positional structure relation of the second reinforcing rod 14b and the second dial gauge 7b and the second sinker 8a is with the positional structure relation of the first reinforcing rod 14a and the first dial gauge 7a and the first sinker 8a; Equally, the structure of the 3rd reinforcing rod 14c and the second dial gauge 7c and the second sinker 8c, the 4th reinforcing rod 14d and the 4th dial gauge 7d and the 4th sinker 8d, the 5th reinforcing rod 14e and the 5th dial gauge 7e and the 5th sinker 8e, the 6th reinforcing rod 14f and the 6th dial gauge 7f and the 6th sinker 8f is all the same; The structure of the second sinker 8b, the 3rd sinker 8c, the 4th sinker 8d, the 5th sinker 8e, the 6th sinker 8f is all with the first sinker 8a; The one-piece construction of the second support 2b and the 3rd support 2c is all with the first support 2a, and the first support 2a, the second support 2b, the 3rd support 2c three screw in mouthful 13 connections through screw 12 DRIVE SCREWSs.
4, wetting-drying test
Distilled water is simulated rainy environment with the mode of leaching to soil sample through watering pot 5, utilize 6 pairs of soil samples of reflection-type well heater to toast the simulation hot environment.After the soil body obvious crackle and its water percentage occur and is lower than 10%, think that the primary drying process finishes after each heating; Think that after soil moisture content is greater than 100% humidification finishes after each rainfall.For example certain design proposal is: drying and watering cycle is 4 times, heats rainfall more earlier, totally 4 times, is not less than for 1 week each cycling time.
5, image data
Because humidification and dry run can cause the generation and the development of soil mass crack; Rimala can be closed and big crack can be expanded in humidification process; Rimala can be expanded and big crack can be shunk in dry run, and therefore, drying and wetting can cause the soil body to produce moderate finite deformation.The present invention is that (8a ~ 8f) sets up dial gauge (78a ~ 8f), (reading of 78a ~ 8f) and then obtain the deformation values of the soil body of the dial gauge through the record drying and wetting then above that through bury sinker underground at diverse location and different depth to the monitoring of soil deformation.Simultaneously in order to study the influence of water percentage and temperature to soil deformation; (need adopt probe-type soil moisture appearance and thermometer to observe the real-time humidity and the temperature of the soil body during reading of 78a ~ 8f), utilize thermometer and hygrometer that indoor temperature is monitored simultaneously at the record dial gauge.
6, deal with data
When dial gauge (after 78a ~ 8f) sets up and finish; (numerical value of 78a ~ 8f) is as the initial value of distortion, and (78a ~ 8f) reading deducts the deformation values that initial value is soil sample to the dial gauge that after this writes down in the process of the test to implement record dial gauge before humidification or the heating process.With the specimen deformation value is ordinate, and the degree of depth, water percentage, humidification or heat time heating time, cycle index are that horizontal ordinate is drawn relation curve, obtain the soil body swell-shrinking deformation situation under different depth, water percentage, humidification or heat time heating time, the cycle index thus.

Claims (3)

1. the burning hot and rainy climate effect experimental provision of monitoring deep soil body swell-shrinking deformation down; Comprise model groove (1), water receiving stand (4), watering pot (5), reflection-type electric heater (6), first dial gauge (7a), first sinker (8a), it is characterized in that:
Water receiving stand (4) is gone up link model groove (1); Model groove (1) have a leaking hole (9); Water receiving stand (4) both sides are put first respectively and are set up platform (3a), second and set up platform (3b), first and set up platform (3a) top and set up watering pot (5), and second sets up platform (3b) top sets up reflection-type electric heater (6);
Be welded with first reinforcing rod (14a), second reinforcing rod (14b), the 3rd reinforcing rod (14c), the 4th reinforcing rod (14d), the 5th reinforcing rod (14e), the 6th reinforcing rod (14f) on first support (2a); First support (2a) middle part is provided with screw and screws in mouthful (13);
First support (2a) integral body is placed on model groove (1) top, and fixing with clamping plate (15);
First dial gauge (7a) is set up in first reinforcing rod (14a) bottom; The gauge rod of first dial gauge (7a) is placed on the Upper gasket (10a) of first sinker (8a), and first sinker (8a) is connected to form through pitman (11) by Upper gasket (10a) and lower gasket (10b); Pitman (11) and lower gasket (10b) are imbedded in the soil body;
Second reinforcing rod (14b) concerns with the positional structure of first reinforcing rod (14a) with first dial gauge (7a) and first sinker (8a) with the positional structure relation of second dial gauge (7b) and second sinker (8a);
Equally, the 3rd reinforcing rod (14c) is all the same with the structure of second dial gauge (7c) and second sinker (8c), the 4th reinforcing rod (14d) and the 4th dial gauge (7d) and the 4th sinker (8d), the 5th reinforcing rod (14e) and the 5th dial gauge (7e) and the 5th sinker (8e), the 6th reinforcing rod (14f) and the 6th dial gauge (7f) and the 6th sinker (8f);
The structure of second sinker (8b), the 3rd sinker (8c), the 4th sinker (8d), the 5th sinker (8e), the 6th sinker (8f) is all with first sinker (8a);
The one-piece construction of second support (2b) and the 3rd support (2c) is all with first support (2a), and first support (2a), second support (2b), the 3rd support (2c) three screw in mouthful (13) through screw (12) DRIVE SCREWS and connect.
2. a kind of burning hot and rainy climate effect according to claim 1 is the experimental provision of monitoring deep soil body swell-shrinking deformation down, and it is characterized in that: model groove (1) is a steel, and the diameter of bottom leaking hole (9) is 0.2cm, and pitch of holes is 1cm.
3. a kind of burning hot and rainy climate effect according to claim 1 is the experimental provision of monitoring deep soil body swell-shrinking deformation down, and it is characterized in that: water receiving stand (4) is high 4cm, the steel vessel of diameter 1.2m.
CN201120221029U 2011-06-27 2011-06-27 Experimental device for monitoring swelling-shrinkage deformation of deep soil under influence of hot rainy weather CN202133659U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103323576A (en) * 2013-06-09 2013-09-25 河海大学 True three-dimensional swell-shrink instrument
CN103698186A (en) * 2013-12-30 2014-04-02 中国科学院武汉岩土力学研究所 Variable-pressure controllable gas replacement reaction device and application thereof in preparation of gas-containing soil sample
CN105866383A (en) * 2016-06-01 2016-08-17 桂林理工大学 Instrument for measuring expansibility under humid-control environment
CN109738480A (en) * 2019-03-28 2019-05-10 凌贤长 A kind of the frost heave device and its monitoring method of scene comprehensive monitoring soil

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103323576A (en) * 2013-06-09 2013-09-25 河海大学 True three-dimensional swell-shrink instrument
CN103698186A (en) * 2013-12-30 2014-04-02 中国科学院武汉岩土力学研究所 Variable-pressure controllable gas replacement reaction device and application thereof in preparation of gas-containing soil sample
CN103698186B (en) * 2013-12-30 2016-01-20 中国科学院武汉岩土力学研究所 Transformation controllable gas displacement reaction device and the application in the gassiness preparation of soil sample thereof
CN105866383A (en) * 2016-06-01 2016-08-17 桂林理工大学 Instrument for measuring expansibility under humid-control environment
CN109738480A (en) * 2019-03-28 2019-05-10 凌贤长 A kind of the frost heave device and its monitoring method of scene comprehensive monitoring soil

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