CN104153340A - Underwater soil mass vibration velocity and pore water pressure measuring equipment and mounting method - Google Patents
Underwater soil mass vibration velocity and pore water pressure measuring equipment and mounting method Download PDFInfo
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- CN104153340A CN104153340A CN201410348659.6A CN201410348659A CN104153340A CN 104153340 A CN104153340 A CN 104153340A CN 201410348659 A CN201410348659 A CN 201410348659A CN 104153340 A CN104153340 A CN 104153340A
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Abstract
The invention relates to underwater soil mass vibration velocity and pore water pressure measuring equipment and a mounting method. A pore water pressure sensor and a three-way velocity sensor are connected fixedly through a second connecting component, the second connecting component and the three-way velocity sensor are located in a drilled hole, the pore water pressure sensor is located in soil mass at the bottom of the drilled hole, an expansion mud ball is arranged above the pore water pressure sensor, and the three-way velocity sensor is enabled to be located in the expansion mud ball. After the expansion mud ball absorbs water to expand, the three-way velocity sensor is fixed in the drilled hole, and the pore water pressure sensor is isolated from water above the drilled hole. The two sensors can be mounted in the same drilled hole accurately, and soil mass vibration velocity of the needed direction and pore water pressure of the needed soil mass can be measured.
Description
Technical field
The present invention relates to a kind of soil body vibration velocity and pore water pressure sensing equipment, relate to specifically a kind of Accurate Determining vibration velocity of the soil body and equipment & installation method of pore water pressure under water.
Background technology
Nowadays,, in a lot of construction of hydro project processes, can relate to the vibration problems such as piling, explosion.For guaranteeing the safety of Adjacent Buildings in work progress, need, to soil body vibration and stable monitoring, relate generally to soil body vibration velocity and pore water pressure and measure.Measure soil body vibration velocity and pore water pressure by conventional sensors and there is convenience, the feature such as accurate, economic, quick.In this respect, sensor has obtained abundant application and further investigation.But three-dimensional velocity sensor is imbedded under water after the soil body, sensor fixing and how to ensure that the vibration measuring direction of sensor is the difficult point of equipment installation with needing to survey direction consistent, yet there are no report.
Three-dimensional velocity sensor and pore water pressure sensor are connected into an entirety and be placed under water in the soil body, and in conventional mounting method, two sensors are divided compared with hole installs, can save boring cost and engineering time.But two sensors are installed simultaneously, need to solve the connection and orientation fixing, three-dimensional velocity sensor under water, the shutoff problem of pore water pressure sensor of sensor, conventional mounting method cannot be completed.The application, by the mounting method of a kind of three-dimensional velocity sensor of the soil body under water of development and pore water pressure sensor, overcomes above-mentioned difficulties, realizes with hole and measures soil body vibration velocity and pore water pressure.
Summary of the invention
The technical problem that the present invention solves when being placed into three-dimensional velocity sensor and pore water pressure sensor under water in the soil body certain depth simultaneously, on the basis of original sensor device by new design, the vibration measuring direction of three-dimensional velocity sensor can be adjusted, the shutoff of the fixing and pore water pressure sensor of three-dimensional velocity sensor can be completed again simultaneously.
One is soil body vibration velocity and pore water pressure sensing equipment under water, comprise the first link, three-dimensional velocity sensor, expansion mud ball, the second link, pore water pressure sensor, boring, the soil body, data collecting instrument, surrounding and the bottom of boring are the soil body, the top of boring is empty, pore water pressure sensor is arranged in the soil body of foot of hole, the first link and the second link are hollow sections, the bottom of three-dimensional velocity sensor is provided with lower through-hole, the top of three-dimensional velocity sensor is provided with through hole, between upper through hole and lower through-hole, there is passage, the lower end of the second link is fixedly connected with the tail end of pore water pressure sensor, the upper end of the second link is fixedly connected with the lower through-hole of three-dimensional velocity sensor, the bottom of the first link is fixedly connected with the upper through hole of three-dimensional velocity sensor, the first outgoing cable of pore water pressure sensor is successively from the second link, three-dimensional velocity sensor, the first link passes and passes from the top of the first link, the second outgoing cable of three-dimensional velocity sensor passes and passes from the top of the first link from the first link, the first outgoing cable is connected with data collecting instrument with the second outgoing cable, expansion mud ball is arranged in boring the top in the foot of hole soil body, three-dimensional velocity sensor is arranged in expansion mud ball.
As the further improvement of the technical program, before expansion mud ball expands, the sealed depth H of expansion mud ball is greater than 1m.
As the further improvement of the technical program, also comprise at least one joint tube connector, tube connector is hollow section, and the upper end of the first link is connected with the bottom of tube connector, the first outgoing cable and the second outgoing cable pass tube connector, and pass from the top of tube connector.
As the further improvement of the technical program, on the top of tube connector or outer wall, has a groove at least.
Mounting method according to said determination equipment:
The first step: accomplish fluently boring in the soil body;
Second step: the first outgoing cable is entered in three-dimensional velocity sensor through the second link, and make the lower through-hole of three-dimensional velocity sensor and the tail end of pore water pressure sensor be fixed and be connected by the second link;
The 3rd step: the first outgoing cable and the second outgoing cable are passed from the first link, and the upper through hole of three-dimensional velocity sensor is fixedly connected with the first link;
The 4th step: the vibration velocity of the soil body under water connecting and pore water pressure sensing equipment are put into boring, and make pore water pressure sensor be positioned at the bottom of boring;
The 5th step: rotate the first link and make three-dimensional velocity sensor to needing to survey direction;
The 6th step: apply downward pressure on the first link, pore water pressure sensor is inserted in the soil body of foot of hole;
The 7th step: the bottom toward boring is poured expansion mud ball into, and expansion mud ball is positioned at the top of the soil body, makes the top of pore water pressure sensor by shutoff, and three-dimensional velocity sensor is arranged in expansion mud ball, expansion mud ball is met water and is shaped one week;
The 8th step: the first outgoing cable, the second outgoing cable are connected with data collecting instrument.
As the further improvement of the technical program, before expansion mud ball expands, the sealed depth H of expansion mud ball is greater than 1m.
Beneficial effect
:the present invention links together three-dimensional velocity sensor and pore water pressure sensor, can adjust the vibration measuring direction of three-dimensional velocity sensor, pore water pressure sensor can be placed into again in the soil layer of desired depth and its top of shutoff, three-dimensional velocity sensor be can also fully fix, thereby the soil vibration speed of required direction and the pore water pressure of required soil layer measured.Meanwhile, this mounting method completes soil body vibration velocity and pore water pressure is measured in same hole, saves construction cost and set-up time.The present invention is simple to operate, easy to use, can be widely used in the mensuration work of soil body vibration velocity and pore water pressure under water.
Brief description of the drawings
Fig. 1 is one soil body vibration velocity and pore water pressure sensing equipment schematic diagram under water.
Fig. 2 is tube connector top view.
Exemplary velocity profile figure when Fig. 3 is the pile anchoring recording.
Fig. 4 is and the corresponding curve map of pore water pressure data form.
Fig. 5 is the soil vibration hodograph recording.
Fig. 6 is the pore water pressure datagram that different time records.
Reference numeral title is as follows:
1, the first outgoing cable; 2, tube connector; 3, the first link; 4, three-dimensional velocity sensor; 5, expansion mud ball; 6, the second link; 7, pore water pressure sensor; 8, boring; 9, groove; 10, the second outgoing cable; 11, the soil body.
Detailed description of the invention
As shown in Figure 1.One is soil body vibration velocity and pore water pressure sensing equipment under water, comprises the first outgoing cable 1, tube connector 2, the first link 3, three-dimensional velocity sensor 4, expansion mud ball 5, the second link 6, pore water pressure sensor 7, boring 8, the second outgoing cable 10, the soil body 11, data collecting instrument.
Surrounding and the bottom of boring 8 are the soil body 11, and the top of boring 8 is empty.Pore water pressure sensor 7 is arranged in the soil body 11 of boring 8 bottoms.Pore water pressure sensor 7 is for measuring the pore water pressure of the soil body 11 of boring 8 bottoms.The first outgoing cable 1 of pore water pressure sensor 7 is positioned at the tail end of pore water pressure sensor 7.The tail end (upper end in Fig. 1) of pore water pressure sensor 7 is provided with internal thread or external screw thread, the second link 6 is hollow section, the lower end of the second link 6 is provided with the screw thread matching with internal thread on pore water pressure sensor 7 tail ends or external screw thread, and the lower end of the second link 6 and pore water pressure sensor 7 are threaded connection.The lower end of certain the second link 6 also can adopt other known connected mode to be fixedly connected with pore water pressure sensor 7.It is to install for convenient that the second link 6 adopts with pore water pressure sensor 7 mode being threaded, and the two is fixed together.The first outgoing cable 1 of pore water pressure sensor 7 is drawn from the second link 6.
Three-dimensional velocity sensor 4 is at x, y, and tri-directions of z are all provided with sensor, can measure x, y, the vibration velocity of tri-directions of z.The bottom of three-dimensional velocity sensor 4 is provided with lower through-hole, and lower through-hole is preferably arranged on the middle part of bottom.The top of three-dimensional velocity sensor 4 is provided with through hole, and upper through hole is preferably arranged on the middle part at top.Be reserved with certain space in the inside of three-dimensional velocity sensor 4, that is to say between through hole and lower through-hole and there is passage, with facilitate the first outgoing cable 1 from the lower through-hole of bottom penetrate and from top through hole pass.The lower through-hole place of three-dimensional velocity sensor 4 is provided with internal thread or external screw thread, the upper end of the second link 6 is provided with the screw thread matching with internal thread on three-dimensional velocity sensor 4 bottoms or external screw thread, and the lower through-hole of the upper end of the second link 6 and three-dimensional velocity sensor 4 bottoms is threaded connection.The upper end of certain the second link 6 also can adopt other known connected mode to be fixedly connected with the lower through-hole of three-dimensional velocity sensor 4.It is to install for convenient that the second link 6 adopts with three-dimensional velocity sensor 4 mode being threaded, and the two is fixed together.The second link 6 is positioned at the below of three-dimensional velocity sensor 4 bottom lower through-holes, to facilitate the first outgoing cable 1 to penetrate three-dimensional velocity sensor 4.The first outgoing cable 1, from the second link 6 passes, penetrates from the lower through-hole of three-dimensional velocity sensor 4 bottoms, and through hole passes from three-dimensional velocity sensor 4 tops.
The first link 3 is hollow section.The bottom of the first link 3 is fixedly connected with the upper through hole at three-dimensional velocity sensor 4 tops.On the top of three-dimensional velocity sensor 4, through hole is provided with internal thread or external screw thread, the lower end of the first link 3 is provided with the screw thread matching with internal thread on three-dimensional velocity sensor 4 tops or external screw thread, and the first link 3 is threaded connection with three-dimensional velocity sensor 4.Certain the first link 3 also can adopt other known connected mode to be fixedly connected with three-dimensional velocity sensor 4.It is to install for convenient that the first link 3 adopts with three-dimensional velocity sensor 4 mode being threaded, and the two is fixed together.The first link 3 is positioned at the top of through hole on three-dimensional velocity sensor 4 tops.The first outgoing cable 1 through hole from three-dimensional velocity sensor 4 tops penetrates the first link 3, and the second outgoing cable 10 of three-dimensional velocity sensor 4 is also that through hole penetrates the first link 3 from three-dimensional velocity sensor 4 tops.
Because boring 8 is generally positioned at seabed, at least need a joint tube connector 2 to be connected with the first link 3, certain tube connector 2 can make the more piece use that links together.The upper end of the first link 3 is connected with the bottom of tube connector 2, and for easy for installation and dismounting, the two can adopt and be threaded.After sensing equipment has been buried underground, tube connector 2 will be thrown off with the first link 3, and tube connector 2 is taken out 8 from holing.In general in the time using more piece tube connector 2, bottom one saves the tube connector 2 that tube connector 2(is connected with the first link 3) adopt and be threaded with the first link 3, between all the other tube connectors 2, adopt screw to be fixedly connected with.Like this when holing 8 fech connection pipe 2, as long as the pipe 2 that is rotatably connected just can be tube connector 2 from the taking-up 8 of holing.Tube connector 2 is also hollow section, the first outgoing cable 1 and the second outgoing cable 10 pass from the first link 3, that is to say that the first outgoing cable 1 and the second outgoing cable 10 pass from the top of the first link 3, and through tube connector 2, pass from the top of tube connector 2.As shown in Figure 2, have a groove 9 on the top of tube connector 2 or outer wall at least, the top of tube connector 2 is provided with four along the circumferential direction evenly distributed grooves 9 in the present embodiment.Groove 9 on tube connector 2 is used for directed.Specifically, three-dimensional velocity sensor 4 can be measured x, y, the vibration velocity of tri-directions of z, when supposing when tube connector 2 and tightening by screw thread with the first link 3, and when the first link 3 is also tightened by screw thread with three-dimensional velocity sensor 4, x on groove 9 and three-dimensional velocity sensor 4 is α degree to the angle between vibration measuring direction, when making x on three-dimensional velocity sensor 4 to vibration measuring direction and need to survey direction when consistent, as long as first the groove 9 on tube connector 2 is turned to the accurate direction that needs to survey, and then tube connector 2 is rotated to negative α degree, x on three-dimensional velocity sensor 4 is just consistent with need survey direction to vibration measuring direction so.That is to say because tube connector 2 and three-dimensional velocity sensor 4 are fixed together, be rotationally connected pipe 2 and can reach the object of the vibration measuring direction of adjusting three-dimensional velocity sensor 4.So groove 9 is preferably positioned at the top of tube connector 2, can certainly be positioned on the outer wall of tube connector 2, as long as easy to use just passable.
Expansion mud ball 5 is mud balls made from swell soil, and expansion mud ball 5 is met water and just can be expanded.Expansion mud ball 5 is positioned at the top of the boring 8 bottom soil bodys 11, is namely positioned at pore water pressure sensor 7 tops, and expansion mud ball 5 is arranged in boring 8.When expansion mud ball 5 being put into behind the bottom of boring 8, expansion mud ball 5 water-swellables, make pore water pressure sensor 7 isolated with the top of boring 8, thereby ensure that pore water pressure sensor 7 records the pore water pressure that pore water pressure is place soil layer, but not from the water pressure of boring 8 top water bodys.For the mud ball 5 that makes to expand effectively makes pore water pressure sensor 7 isolated with the top of boring 8, the sealed depth H of expansion mud ball 5 before expansion is greater than 1 meter, be in general only larger than 1 meter just passable, certainly boring 8 is filled up also passable.In general, the length of the first link 3 is greater than 2 meters, in the time that the sealed depth H of expansion mud ball 5 before expansion is slightly larger than 1 meter, the mud ball 5 that expands so also can not block the upper end of the first link 3 after expansion, to facilitate tube connector 2 after 5 sizings of expansion mud ball to throw off from the first link 3.Three-dimensional velocity sensor 4 is arranged in expansion mud ball 5, thereby three-dimensional velocity sensor 4 is fixed in boring 8.
The first outgoing cable 1 is connected with data collecting instrument with the second outgoing cable 10.Be used for observing and recording the reading of three-dimensional velocity sensor 4 and pore water pressure sensor 7.
The said equipment is to be applied to measure soil body vibration velocity and pore water pressure under water.The installation steps of the said equipment are as follows.
The first step: accomplish fluently boring 8 in the soil body 11.
Second step: three-dimensional velocity sensor 4 is connected by the second link 6 with pore water pressure sensor 7, and the first outgoing cable 1 is entered in three-dimensional velocity sensor 4 through the second link 6.
The 3rd step: the upper through hole of three-dimensional velocity sensor 4 is connected with the first link 3, and the first outgoing cable 1 of pore water pressure sensor 7 and the second outgoing cable 10 of three-dimensional velocity sensor 4 are passed from the first link 3.
The 4th step: the bottom of tube connector 2 is connected with the top of the first link 3, and make the first outgoing cable 1 of pore water pressure sensor 7 and the second outgoing cable 10 of three-dimensional velocity sensor 4 from the first link 3, pass and pass from tube connector 2, if the length of boring 8 is greater than the length of tube connector 2, can use more piece tube connector 2 to interconnect, make one to save the top of tube connector 2 higher than the top of boring 8 topmost.
The 5th step: the vibration velocity of the soil body under water connecting and pore water pressure sensing equipment are put into boring 8, and make pore water pressure sensor 7 be positioned at the bottom of boring 8.
The 6th step: first make the groove 9 on tube connector 2 aim at the direction of vibration that needs measurement, then rotate negative α degree, make to need the direction of vibration of measurement identical with the direction of vibration that can measure of three-dimensional velocity sensor 4, that is to say that being rotationally connected pipe 2 makes three-dimensional velocity sensor 4 to need survey direction, certainly we also can rotate the first link 3 make need measure direction of vibration identical with the direction of vibration that can measure of three-dimensional velocity sensor 4, from in essence, because tube connector 2 and the first link 3 link together, which rotates is all the same.
The 7th step: apply downward pressure on tube connector 2, pore water pressure sensor 7 is inserted in the soil body 11 of boring 8 bottoms, make pore water pressure sensor 7 can measure the pore water pressure in the soil body 11 of boring 8 bottoms, certainly we also can any one (comprising the first link 3) on sensing equipment apply downward pressure, and pore water pressure sensor 7 is inserted in the soil body 11 of boring 8 bottoms.
The 8th step: the bottom toward boring 8 is poured expansion mud ball 5 into, expansion mud ball 5 is positioned at the top of the soil body 11 of boring 8 bottoms, make the top of pore water pressure sensor 7 by shutoff, before expansion mud ball 5 expands, the sealed depth H of expansion mud ball 5 is greater than 1m, three-dimensional velocity sensor 4 is arranged in expansion mud ball 5, expansion mud ball 5 is shaped after one week through meeting water, and tube connector 2 and the first link 3 are thrown off; 5 shutoff of expansion mud ball are poured on pore water pressure sensor 7 tops into, before expansion mud ball 5 expands, the sealed depth H of expansion mud ball 5 is greater than 1m, shutoff processing can ensure that the measured value of pore water pressure sensor 7 is the pore water pressure of place soil layer like this, can not be subject to the impact from boring 8 internal upper part water bodys, the mud ball 5 that simultaneously expands can also fully be fixed three-dimensional velocity sensor 4, three-dimensional velocity sensor 4 is linked together by expansion mud ball 5 and boring 8 soil body 11 around, thus the three-way vibration speed of the Measurement accuracy soil body 11.
The 9th step: the pipe 2 that is rotatably connected, tube connector 2 and the first link 3 are thrown off, tube connector 2 is withdrawn from from holing 8.
The tenth step: the first outgoing cable 1, the second outgoing cable 10 are connected with data collecting instrument.Be used for observing and recording the reading of three-dimensional velocity sensor 4 and pore water pressure sensor 7.
So far two complete successful installations of sensor in the soil body 11 under water, can carry out piling vibration experiment in respective distance.Now, record the reading of three-dimensional velocity sensor 4 and pore water pressure sensor 7.Three-way vibration speed detects whole process and runs through piling process, real-time monitored three-way vibration rate curve, and pore water pressure detects twice normal every day.
This vibration velocity collection adopts domestic state-of-the-art dynamic acquisition test macro DH5920, its multi-channel parallel synchronous sampling technique maturation and stability are better, the highest sampling rate of every passage reaches 128kHz, meet vibration, impact, the multiple test of noise, and sampling is convenient, there is abundant data analysis processing capacity, in test process, can obtain in real time the speed time-history curves of sensing station.The vibration velocity data that record are shown in Fig. 5, and when the pile anchoring that records, exemplary velocity profile is shown in Fig. 3.
This pore water pressure collection adopts the XP-02 type type vibration wire frequency recorder of precision <0.lHz, directly measure the change of frequency of hole potamometer, according to the pore water pressure of demarcating and the relation curve of frequency, obtained the pore water pressure value of this measuring point by the frequency of Measured pore water pressure.The pore water pressure force data of the different time points recording is shown in Fig. 6, and corresponding pore water pressure force curve is shown in Fig. 4.
The data of measuring by this mounting method: Fig. 5, Fig. 6 and Fig. 3, Fig. 4, the variation of actual soil vibration speed and pore water pressure can reflect piling vibration time.Illustrate that this equipment and mounting method thereof successfully realized the successful installation of three-dimensional velocity sensor in water-bed boring 84 and pore water pressure sensor 7 and have operated.
The undeclared part that relates in the present invention is same as the prior art or adopt prior art to be realized.
Claims (6)
1. soil body vibration velocity and pore water pressure sensing equipment under water, it is characterized in that: comprise the first link (3), three-dimensional velocity sensor (4), expansion mud ball (5), the second link (6), pore water pressure sensor (7), boring (8), the soil body (11), data collecting instrument, surrounding and the bottom of boring (8) are the soil body (11), the top of boring (8) is empty, pore water pressure sensor (7) is arranged in the soil body (11) of boring (8) bottom, the first link (3) and the second link (6) are hollow sections, the bottom of three-dimensional velocity sensor (4) is provided with lower through-hole, the top of three-dimensional velocity sensor (4) is provided with through hole, between upper through hole and lower through-hole, there is passage, the lower end of the second link (6) is fixedly connected with the tail end of pore water pressure sensor (7), the upper end of the second link (6) is fixedly connected with the lower through-hole of three-dimensional velocity sensor (4), the bottom of the first link (3) is fixedly connected with the upper through hole of three-dimensional velocity sensor (4), first outgoing cable (1) of pore water pressure sensor (7) is successively from the second link (6), three-dimensional velocity sensor (4), the first link (3) passes and passes from the top of the first link (3), second outgoing cable (10) of three-dimensional velocity sensor (4) passes and passes from the top of the first link (3) from the first link (3), the first outgoing cable (1) is connected with data collecting instrument with the second outgoing cable (10), expansion mud ball (5) is arranged in boring (8) the top in boring (8) the bottom soil body (11), three-dimensional velocity sensor (4) is arranged in expansion mud ball (5).
2. sensing equipment according to claim 1, is characterized in that: before expansion mud ball (5) expands, the sealed depth of expansion mud ball (5) is greater than 1m.
3. sensing equipment according to claim 1, it is characterized in that: also comprise at least one joint tube connector (2), tube connector (2) is hollow section, the upper end of the first link (3) is connected with the bottom of tube connector 2, the first outgoing cable (1) and the second outgoing cable (10) pass tube connector (2), and pass from the top of tube connector (2).
4. sensing equipment according to claim 3, is characterized in that: also comprise groove (9), have a groove (9) on the top of tube connector (2) or outer wall at least.
5. the mounting method of sensing equipment according to claim 1, is characterized in that:
The first step: accomplish fluently boring (8) in the soil body (11);
Second step: the first outgoing cable (1) is entered in three-dimensional velocity sensor (4) through the second link (6), and make the lower through-hole of three-dimensional velocity sensor (4) and the tail end of pore water pressure sensor (7) be fixed and be connected by the second link (6);
The 3rd step: the first outgoing cable (1) and the second outgoing cable (10) are passed from the first link (3), and the upper through hole of three-dimensional velocity sensor (4) is fixedly connected with the first link (3);
The 4th step: the vibration velocity of the soil body under water connecting and pore water pressure sensing equipment are put into boring (8), and make pore water pressure sensor (7) be positioned at the bottom of boring (8);
The 5th step: rotate the first link (3) and make three-dimensional velocity sensor (4) to needing to survey direction;
The 6th step: apply downward pressure on the first link (3), pore water pressure sensor (7) is inserted in the soil body (11) of boring (8) bottom;
The 7th step: the bottom toward boring (8) is poured expansion mud ball (5) into, expansion mud ball (5) is positioned at the top of the soil body (11) of boring (8) bottom, and three-dimensional velocity sensor (4) is arranged in expansion mud ball (5), and expansion mud ball (5) is met water and is shaped one week;
The 8th step: the first outgoing cable (1), the second outgoing cable (10) are connected with data collecting instrument.
6. the mounting method of sensing equipment according to claim 5, is characterized in that: before expansion mud ball (5) expands, the sealed depth of expansion mud ball (5) is greater than 1m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410348659.6A CN104153340B (en) | 2014-07-22 | 2014-07-22 | One is soil body vibration velocity and pore water pressure sensing equipment and mounting method under water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410348659.6A CN104153340B (en) | 2014-07-22 | 2014-07-22 | One is soil body vibration velocity and pore water pressure sensing equipment and mounting method under water |
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| CN104153340A true CN104153340A (en) | 2014-11-19 |
| CN104153340B CN104153340B (en) | 2016-04-13 |
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| CN201410348659.6A Active CN104153340B (en) | 2014-07-22 | 2014-07-22 | One is soil body vibration velocity and pore water pressure sensing equipment and mounting method under water |
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| CN104805822A (en) * | 2015-04-03 | 2015-07-29 | 水利部交通运输部国家能源局南京水利科学研究院 | Single-pore multi-point pore water pressure meter embedding fixing device and embedding method thereof |
| CN105352641A (en) * | 2015-10-21 | 2016-02-24 | 上海交通大学 | Device capable of simultaneously measuring duct piece soil pressure and pore water pressure, and installation method therefor |
| CN105572323A (en) * | 2016-01-29 | 2016-05-11 | 南京全水信息科技有限公司 | Soil sensor |
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| Publication number | Publication date |
|---|---|
| CN104153340B (en) | 2016-04-13 |
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Effective date of registration: 20200813 Address after: A3-41, building B6, No.2, Zidong Road, Maqun street, Qixia District, Nanjing City, Jiangsu Province, 210049 Patentee after: Nanjing Zhibo Technology Co.,Ltd. Address before: Nanjing City, Jiangsu province 210098 Xikang Road No. 1 Patentee before: HOHAI University |