CN103147432B - Spherical hole-pressure static cone penetration probe for detecting sludge - Google Patents

Spherical hole-pressure static cone penetration probe for detecting sludge Download PDF

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Publication number
CN103147432B
CN103147432B CN201310052158.9A CN201310052158A CN103147432B CN 103147432 B CN103147432 B CN 103147432B CN 201310052158 A CN201310052158 A CN 201310052158A CN 103147432 B CN103147432 B CN 103147432B
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China
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probe
press filtration
filtration ring
hole press
spherical
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Expired - Fee Related
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CN201310052158.9A
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CN103147432A (en
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邹海峰
刘松玉
蔡国军
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Southeast University
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Southeast University
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Abstract

The invention declares a spherical hole-pressure static cone penetration probe for detecting sludge. The probe comprises a coaxial cable (1) used for signal and data transmission, a probe rod (2) and a waterproof ring (3) at the upper part, and an analog-digital converter (4) in the middle, wherein a seal ring (5) and a side wall friction tube (6) are arranged at the lower part of the probe rod (2); an inclinometer (7), a side wall friction resistance sensor (8) , a temperature sensor (9), three pore water pressure sensors (10.1, 10.2 and 10.3) and a round sphere-shaped resisting force sensor (11) are arranged in the side wall friction tube (6); the spherical probe (12) is connected with the lower part of the side wall friction tube (6); three hole-pressure filtering rings (13.1, 13.2 and 13.3) are arranged on the spherical probe (12) and are respectively connected with the three pore water pressure sensors (10.1, 10.2 and 10.3). The probe provided by the invention has the characteristics of being in-situ, direct, quick, accurate and economical, and provides a powerful detect tool for geotechnical engineering practice.

Description

A kind of spherical pore pressure static sounding probe for detecting mud
Technical field
The present invention relates to a kind of spherical pore pressure static sounding probe that can be used for detecting mud, belong in geotechnical engineering field a kind of can directly, the static sounding device of analytical test river bed or bottom silt continuously.
Background technology
Static sounding technology refers to and utilizes pressure apparatus by the sounding rod indentation test soil layer with contact probe, the static point resistance, side friction power etc. of throughput examining system test soil, some basic physical mechanics properties of soil can be determined, as the modulus of deformation of soil, the allowable bearing etc. of soil.The static sounding technology history of existing more than 80 year so far.Extensive use static sounding in the world, partly or entirely instead of the probing in engineering investigation and sampling.First China succeed in developing electric measuring type static sounding in nineteen sixty-five and be applied to prospecting.In recent years along with the fast development of sensor technology, occurred a lot of new static sounding technology, these technology can obtain the pore water pressure of soil layer, seismic wave, pollutant proterties, temperature, even image quickly and accurately.It is widely used in environmental geotechnical field abroad.China is more late in the research starting of novel static sounding sensor, and the penetration resistance that current domestic widely used single Double lumen intubation only can be tested or specific penetration resistance, side friction power, confirmable soil layer basic physical mechanics properties is very limited.Along with the fast development of China's economy, China harbour, navigation channel and water conservancy construction cause are also thereupon flourish, the dredging in the construction of seabed engineering, navigation channel, river course, lake and to widen and the object of construction production such as newly-built, enlarging at harbour all inevitably needs to process a large amount of mud.These mud are embedded under deep water usually, and have very high viscosity and thixotropy, and intensity is low, highly sensitive.Existing sampling technique cannot obtain undisturbed sample, and can produce loss of water equally in transportation, makes its actual value of laboratory test results substantial deviation.Although existing static sounding technology may be used for the original position characteristic evaluating mud, but because the intensity of mud is too low, part is suspension state, therefore the penetration resistance that produces of static cone penetration equipment is lower than the resolution ratio of itself, so certainty of measurement is difficult to the requirement meeting quality data.Although T-shaped detector and disk power CPTU probe adds the area contacted with mud, improve resolution ratio, but the former easy discontinuity equalization in penetration process, the parts such as probe easily damage; The latter is more suitable for the detection of suspension mud, and solidifying, depth of penetration in shape mud is more shallow, and is non-at the uniform velocity penetration process, and injection speed affects highly significant to actual measurement penetration resistance, needs to make effective correction.
Therefore, need a kind of new technical scheme to solve the problem.
Summary of the invention
The object of the invention is the deficiency existed for prior art, the spherical pore pressure static sounding probe for detecting mud directly can evaluating mud characteristic is provided.
For achieving the above object, the present invention can adopt following technical scheme for the spherical pore pressure static sounding probe detecting mud:
For detecting a spherical pore pressure static sounding probe for mud, comprising the feeler lever of lengthwise, being positioned at the sidewall friction cylinder of feeler lever front end, being positioned at the side friction force snesor of sidewall friction cylinder, being positioned at the spheric probe of sidewall friction cylinder front end, the some holes press filtration ring be positioned on spheric probe, the pore water pressure sensor that is connected with hole press filtration ring; Also comprise temperature pick up, spherical resistive force sensor, inclinometer and analog-digital converter.
Compared with background technology, the invention solves the defect directly can not evaluating mud original position characteristic in prior art, by the ball penetration resistance, side friction power and the pore water pressure that produce in penetration process, the original position characteristic that energy is convenient, fast, continuous print evaluates mud, makes static sounding technology can serve geotechnical engineering field more accurately, all sidedly.The present invention has the feature of continuity, reliability and repeatability.
For achieving the above object, the present invention can adopt following technical scheme for the using method of the spherical pore pressure static sounding probe detecting mud:
Probe is placed in the following left for some minutes of water surface 5m, making to pop one's head in, it is enough saturated to obtain; Under earth's surface injection systemic effect, spheric probe is with in constant rate of speed injection mud; The frictional resistance that side friction force sensor measuring sidewall friction cylinder is subject to, spherical resistive force sensor measures the penetration resistance that spheric probe is subject to; Pore water pressure sensor measures the pore water pressure size that spheric probe is subject to; Adopt temperature pick up to provide in test process inner temperature of popping one's head in, measured value is compensated and revises; Inclinometer provides this for detecting the angle of inclination of the spherical pore pressure static sounding probe of mud, revises depth of penetration; The data of all measurements and record are converted to after data signal through analog-digital converter, transfer in the Microcomputer Collecting on earth's surface and storage system and preserve, draw the sectional drawing of real-time continuous.
Accompanying drawing explanation
Fig. 1 is that the present invention is for detecting the structural representation of the spherical pore pressure static sounding probe of mud.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, these embodiments should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
Refer to shown in Fig. 1, the present invention discloses a kind of spherical pore pressure static sounding probe for detecting mud, it adopts coaxial cable 1 transmission of signal and data, the feeler lever 2 comprising lengthwise, the sidewall friction cylinder 6 being positioned at feeler lever front end, the side friction force snesor 8 being positioned at sidewall friction cylinder 6, the spheric probe 12 being positioned at sidewall friction cylinder 6 front end, the some holes press filtration ring be positioned on spheric probe 12, the pore water pressure sensor that is connected with hole press filtration ring; Also comprise temperature pick up 9, spherical resistive force sensor 11, inclinometer 7 and analog-digital converter 4.Water proof ring 3 is provided with in described feeler lever 2; Described feeler lever 2 is provided with sealing ring 5 with sidewall friction cylinder 6 junction.Described hole press filtration ring comprises the first hole press filtration ring 13.1 in spheric probe 12 equatorial positions, the 3rd hole press filtration ring 13.3 on spheric probe 12 top, the second hole press filtration ring 13.2 between the first hole press filtration ring 13.1 and the 3rd hole press filtration ring 13.3; Described pore water pressure sensor comprises the 3rd pore water pressure sensor 10.3 of the first pore water pressure sensor 10.1 of connection first hole press filtration ring 13.1, the second pore water pressure sensor 10.2 connecting the second hole press filtration ring 13.2 and connection the 3rd hole press filtration ring 13.3.In the present embodiment, the specific design of each several part is preferably dimensioned to be: the diameter of spheric probe 12 is 113mm, and projected area is 10000mm 2.Sidewall friction cylinder 5 external diameter is 35.7mm, surface area 150cm 2.The diameter of the first hole press filtration ring 13.1 is 113mm, the diameter of the second hole press filtration ring 13.2 is 57mm, the diameter of the 3rd hole press filtration ring 13.3 is 10mm.
Illustrate that the present invention is used for detecting the using method of the spherical pore pressure static sounding probe of mud below by concrete EXPERIMENTAL EXAMPLE
Before test, this spheric probe 12 is placed in below water surface 5m and stops 5 minutes, spheric probe 12 is obtained enough saturated.Under earth's surface injection systemic effect, spheric probe 12 is with in the constant rate of speed injection mud of 2cm/s.Side friction force snesor 8 measures the frictional resistance that sidewall friction cylinder 6 is subject to, and spherical resistive force sensor 11 measures the penetration resistance that spheric probe 12 is subject to.The surface area of spheric probe 12 is large, and the penetration resistance be therefore subject to is large, solves the problem of conventional static(al) penetration technology lack of resolution.First, second, third pore water pressure sensor 10.1,10.2,10.3 is measured in spheric probe 12 equator by the first hole press filtration ring 13.1, second hole press filtration ring the 13.2, the 3rd hole press filtration ring 13.3, the pore water pressure size of middle part and top end, can be used for the flow behavior evaluating mud on the one hand, can be used for the penetration resistance that correction spheric probe is subject on the other hand.Due to the penetration resistance that records and pore water pressure less, and the temperature difference of seawater at different depth place is very large, temperature is comparatively remarkable on measured value impact, therefore adopt temperature pick up 9 to provide the temperature of pressing static sounding probe inside in test process for the spherical pore detecting mud, measured value is compensated and revises.Inclinometer 7 is provided for the angle of inclination of the spherical pore pressure static sounding probe detecting mud, revises depth of penetration.It is inner that water proof ring 3 stops water to enter feeler lever 2, avoids circuit to damage.Sealing ring 5 also can prevent mud approaching side wall friction cylinder 6 inner while waterproof.The data of all measurements and record, after analog-digital converter 4 is converted to data signal, transfers in the Microcomputer Collecting on earth's surface and storage system through coaxial cable 1 and preserve, draw the sectional drawing of real-time continuous.By ball penetration resistance, side friction power and pore water pressure, the original position characteristic of river bed or bottom silt can be evaluated, make static sounding technology can serve geotechnical engineering field more accurately, all sidedly.The present invention has the feature of continuity, reliability and repeatability.

Claims (4)

1., for detecting a spherical pore pressure static sounding probe for mud, it is characterized in that: the feeler lever (2) comprising lengthwise, the sidewall friction cylinder (6) being positioned at feeler lever front end, the side friction force snesor (8) being positioned at sidewall friction cylinder (6), the spheric probe (12) being positioned at sidewall friction cylinder (6) front end, the some holes press filtration ring be positioned on spheric probe (12), the pore water pressure sensor that is connected with hole press filtration ring; Also comprise temperature pick up (9), spherical resistive force sensor (11), inclinometer (7) and analog-digital converter (4); Described hole press filtration ring comprises the first hole press filtration ring (13.1) being positioned at spheric probe (12) equatorial positions, the 3rd hole press filtration ring (13.3) being positioned at spheric probe (12) top, is positioned at the second hole press filtration ring (13.2) between the first hole press filtration ring (13.1) and the 3rd hole press filtration ring (13.3); Described pore water pressure sensor comprise connection first hole press filtration ring (13.1) the first pore water pressure sensor (10.1), connect the second hole press filtration ring (13.2) the second pore water pressure sensor (10.2) and connect the 3rd pore water pressure sensor (10.3) in the 3rd hole press filtration ring (13.3).
2. the spherical pore pressure static sounding probe for detecting mud according to claim 1, is characterized in that: this spherical pore pressure static sounding probe being used for detecting mud adopts coaxial cable (1) transmission of signal and data.
3. the spherical pore pressure static sounding probe for detecting mud according to claim 1, is characterized in that: the diameter in the first hole press filtration ring (13.1) is 113mm, the diameter in the second hole press filtration ring (13.2) is 57mm, the diameter in the 3rd hole press filtration ring (13.3) is 10mm.
4. the using method of the spherical pore pressure static sounding probe for detecting mud according to claim 1, is characterized in that:
Spheric probe (12) is placed in the following left for some minutes of water surface 5m, makes spheric probe (12) obtain saturated; Under earth's surface injection systemic effect, spheric probe (12) is with in constant rate of speed injection mud; Side friction force snesor (8) measures the frictional resistance that sidewall friction cylinder (6) is subject to, and spherical resistive force sensor (11) measures the penetration resistance that spheric probe is subject to; Pore water pressure sensor measures the pore water pressure size that spheric probe is subject to; Adopt temperature pick up to provide in test process inner temperature of popping one's head in, measured value is compensated and revises; Inclinometer (7) provides this for detecting the angle of inclination of the spherical pore pressure static sounding probe of mud, revises depth of penetration; The data of all measurements and record are converted to after data signal through analog-digital converter, transfer in the Microcomputer Collecting on earth's surface and storage system and preserve, draw the sectional drawing of real-time continuous.
CN201310052158.9A 2013-02-18 2013-02-18 Spherical hole-pressure static cone penetration probe for detecting sludge Expired - Fee Related CN103147432B (en)

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CN106192969B (en) * 2016-07-12 2018-02-02 东南大学 One kind is based on the full discharge orifice pressure feeler inspection penetrometer of ball-type and its coefficient of consolidation evaluation method
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CN107504936A (en) * 2017-09-25 2017-12-22 江苏省水利科学研究院 Mud detecting system and mud detection method
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WO2019127110A1 (en) * 2017-12-27 2019-07-04 大连理工大学 Free falling type ball-shaped penetrometer with propeller
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CN110735428B (en) * 2019-10-23 2021-11-12 中国海洋大学 Deep sea spherical sounding probe
CN110824147B (en) * 2019-12-17 2023-07-18 大连理工大学 Full-flow ball type penetration device and method for laboratory and shipborne
CN112663586B (en) * 2020-12-17 2022-08-12 江苏南京地质工程勘察院 Multi-unit pore pressure matrix spherical full-flow injection device
CN112729235B (en) * 2021-01-26 2022-11-29 温州大学 Wireless detection equipment and wireless detection method for rapidly positioning bottom falling depth and long-term settlement of throwing-filling stones in blasting and silt squeezing construction
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