CN110579307A - Shallow sea type submarine sediment pressure observation device and method - Google Patents
Shallow sea type submarine sediment pressure observation device and method Download PDFInfo
- Publication number
- CN110579307A CN110579307A CN201910962923.8A CN201910962923A CN110579307A CN 110579307 A CN110579307 A CN 110579307A CN 201910962923 A CN201910962923 A CN 201910962923A CN 110579307 A CN110579307 A CN 110579307A
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- pressure
- sensor
- sediment
- shallow sea
- observation device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
- G01C5/04—Hydrostatic levelling, i.e. by flexibly interconnected liquid containers at separated points
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
Abstract
The invention discloses a shallow sea type submarine sediment pressure observation device and a method, belonging to the technical field of submarine detection, wherein the shallow sea type submarine sediment pressure observation device comprises a probe rod, a conical tip, a pressure-resistant cabin, a data acquisition assembly and a probe, wherein the probe rod is hollow to form an accommodating cavity and comprises a plurality of section rods which are mutually connected; the conical tip is arranged at one end of the probe rod; the pressure-resistant cabin is arranged at the other end of the probe rod, and the data acquisition assembly is arranged in the pressure-resistant cabin; the probe is arranged at the joint of the adjacent nodes and comprises a shell and a sensor arranged in the shell, one end of the sensor is electrically connected with the data acquisition assembly, the other end of the sensor is communicated with the outside to detect the outside pressure, and the two sensors are respectively a pore water pressure sensor and a soil pressure sensor. The shallow sea type seabed sediment pressure observation method adopts the shallow sea type seabed sediment pressure observation device to detect the pore water pressure and the soil pressure simultaneously, and further promotes the research on the mechanical state of the seabed sediment.
Description
Technical Field
the invention relates to the technical field of submarine detection, in particular to a shallow sea type submarine sediment pressure observation device and method.
Background
The change of the pore water pressure in the marine sediment is an important indicating parameter of the sediment strength change, and has a remarkable indicating function on the geological disaster phenomena such as sea wave and seabed landslide caused by earthquake. The action of earthquake and sea wave increases the pressure of pore water in the sediment, especially sand or silt, and reduces the effective stress supported by the sediment, thereby reducing the strength of the sediment. The stability of the deposit can be understood by the change in pore water pressure. Under the wave load, various mechanical states of the waves attached to the sediment can be known by observing the change of the pore water pressure in the sediment, so that technical support is provided for stability analysis. Therefore, observation of pore water pressure in the sediment under dynamic load is an important technical means in marine geotechnical engineering or marine geological disaster analysis.
Disclosure of Invention
The invention aims to provide a shallow sea type submarine sediment pressure observation device and method, which are used for observing mechanical parameters in marine sediments in real time so as to know the stability of the sediments.
as the conception, the technical scheme adopted by the invention is as follows:
a shallow sea type seafloor sediment pressure observation device, comprising:
the probe rod is hollow inside to form an accommodating cavity and comprises a plurality of section rods which are detachably connected;
The conical tip is arranged at one end of the probe rod;
The pressure-resistant cabin is arranged at the other end of the probe rod;
The data acquisition assembly is arranged in the pressure-resistant cabin;
The probe is arranged at the joint of the adjacent section rods, the probe comprises a shell and a sensor arranged in the shell, one end of the sensor is electrically connected with the data acquisition assembly, the other end of the sensor is communicated with the outside to detect the outside pressure, and the two sensors are respectively a pore water pressure sensor and a soil pressure sensor.
The sensor is arranged in the mounting hole, and one end of the mounting hole is communicated with the outside.
The shell is internally provided with a threading channel communicated with the accommodating cavity, and the other end of the mounting hole is communicated with the threading channel.
and a pressure guide hole is also formed in the shell and communicated with the accommodating cavity.
the sensor comprises a pore water pressure sensor and a soil pressure sensor, wherein the pore water pressure sensor and the soil pressure sensor are respectively of two types, a permeable stone is arranged at the communication position of the pore water pressure sensor and the outside, and a stainless steel diaphragm is arranged at the communication position of the soil pressure sensor and the outside.
Wherein, the data acquisition subassembly includes:
the circuit board is arranged in the pressure-resistant cabin;
The wire penetrates through the accommodating cavity, one end of the wire is connected with the circuit board, and the other end of the wire is connected with the sensor.
The base comprises a supporting plate and a cover body, the supporting plate is connected with the probe rod, and the cover body is connected with the pressure-resistant cabin.
wherein the cross-sectional area of the support plate is larger than the cross-sectional area of the probe rod.
And a flange is arranged at one end of the pressure-resistant cabin and is connected with the cover body.
A shallow sea type seafloor sediment pressure observation method using the shallow sea type seafloor sediment pressure observation device as described above, comprising:
laying: the shallow sea type submarine sediment pressure observation device is arranged in water, the detection value of a sensor is hydrostatic pressure, and the detection value of the sensor is gradually increased along with the increase of the water depth;
Penetration: along with the penetration of the cone tip into the soil body, the detection value of the pore water pressure sensor is the pore water pressure comprising the hydrostatic pressure, and the detection value of the soil pressure sensor is the soil pressure comprising the hydrostatic pressure; when the penetration is finished, the detection value of the pore water pressure sensor and the detection value of the soil pressure sensor are temporarily in a stable state;
And (3) observation: when waves, earthquakes and other loads act, the pressure in the sediment is changed, the detection value of the pore water pressure sensor and the detection value of the soil pressure sensor are changed, and the pressure value of the load attached to the sediment can be obtained by observing the change of the detection values.
the invention has the beneficial effects that:
the shallow sea type submarine sediment pressure observation device provided by the invention can simultaneously detect the pore water pressure and the soil pressure, and further promote the research on the mechanical state of submarine sediment. When the soil pressure sensor is arranged, the detection value of the pore water pressure sensor is the pore water pressure including the hydrostatic pressure along with the penetration of the conical tip into the soil body, the detection value of the soil pressure sensor is the soil pressure including the hydrostatic pressure, and the measuring range of the probe cannot be too large due to the application in shallow sea. When the deployment is completed, the sensor displays the pressure value without external load. When waves, earthquakes and other loads act, the pressure in the sediment is changed, so that the detection value of the sensor is changed, and various mechanical states of different loads attached to the sediment are known by observing the real-time change of the detection value.
drawings
FIG. 1 is a cross-sectional view of a shallow sea type seafloor sediment pressure observation device provided by an embodiment of the invention;
FIG. 2 is a cross-sectional view of a probe of a shallow sea seafloor sediment pressure observation device provided by an embodiment of the invention;
FIG. 3 is a top view of a probe of a shallow sea seafloor sediment pressure observation device provided by an embodiment of the invention;
Fig. 4 is a sectional view taken along line a-a of fig. 3.
In the figure:
1. A probe rod; 11. an accommodating cavity;
2. a conical tip;
3. a pressure-resistant cabin;
4. A data acquisition component;
5. a probe; 51. a housing; 511. mounting holes; 512. a threading channel; 513. a pressure guide hole; 52. a sensor; 53. a permeable stone; 54. a watertight plug; 55. a stainless steel diaphragm;
6. A base; 61. a support plate; 62. a cover body;
7. And (4) a flange.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
in the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
the technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Referring to fig. 1 to 4, the embodiment of the invention provides a shallow sea type seabed sediment pressure observation device, which needs to penetrate into the seabed during use to observe the change of mechanical parameters in sediment.
The shallow sea type submarine sediment pressure observation device comprises a probe rod 1, a cone tip 2, a pressure-resistant cabin 3, a data acquisition assembly 4 and a probe 5, wherein the cone tip 2 is arranged at one end of the probe rod 1, and the pressure-resistant cabin 3 is arranged at the other end of the probe rod 1. The inside cavity of probe rod 1 forms holding chamber 11, and probe rod 1 is including dismantling a plurality of section poles of connection, and probe 5 sets up in the junction of adjacent section pole, and data acquisition subassembly 4 sets up in withstand voltage cabin 3. The probe 5 comprises a shell 51 and a sensor 52 arranged in the shell 51, one end of the sensor 52 is electrically connected with the data acquisition assembly 4, the other end of the sensor is communicated with the outside to detect the pressure of the outside, and the sensors 52 are two types, namely a pore water pressure sensor and a soil pressure sensor.
The shallow sea type submarine sediment pressure observation device can simultaneously detect the pore water pressure and the soil pressure, and further promotes the research on the mechanical state of submarine sediment. When the probe is laid, the detection value of the pore water pressure sensor is the pore water pressure including the hydrostatic pressure along with the penetration of the conical tip 2 into the soil body, the detection value of the soil pressure sensor is the soil pressure including the hydrostatic pressure, and the measuring range of the probe 5 cannot be too large due to the application in shallow sea. When deployment is complete, the sensor 52 displays the pressure value without external loading. When waves, earthquakes and other loads act, the pressure in the sediment is changed, so that the detection value of the sensor 52 is changed, and various mechanical states of different loads attached to the sediment are known by observing the real-time change of the detection value.
because the soil body is of a layered structure, the properties of each layer of soil body are different, and the mechanical parameters are also different. In order to accurately measure the soil body, the probe 5 is provided with a plurality of rods, and the length of each rod can be selected according to the requirement. The awl point 2 sets up in the bottommost of probe rod 1, and awl point 2 can be directly be connected with the festival pole, also can set up a probe 5 between awl point 2 and the festival pole, and the one end and the festival pole of probe 5 are connected, and the other end and the awl point 2 of probe 5 are connected.
The data acquisition assembly 4 comprises a circuit board and a wire, the circuit board is positioned in the pressure-resistant cabin 3, the wire penetrates through the accommodating cavity 11, one end of the wire is connected with the circuit board, and the other end of the wire is connected with the sensor 52. The data collected by the sensor 52 is transmitted to the circuit board through a wire, and the circuit board is provided with a storage module for storing the data.
The pressure-resistant cabin 3 protects the data acquisition component 4. In order to realize the stable connection between the pressure-resistant cabin 3 and the probe rod 1, a base 6 is arranged between the pressure-resistant cabin 3 and the probe rod 1, the base 6 comprises a supporting plate 61 and a cover body 62, the supporting plate 61 is connected with the probe rod 1, and the cover body 62 is connected with the pressure-resistant cabin 3. The joint of the pressure-resistant cabin 3 and the cover 62 is provided with a threading hole, and a wire can pass through the cover 62 and enter the accommodating cavity 11 of the probe rod 1. The pressure-resistant cabin 3 needs to have certain sealing property, waterproofness and pressure resistance.
The probe rod 1 is in threaded connection with the support plate 61. The cross-sectional area of the support plate 61 is larger than that of the probe rod 1. The supporting plate 61 has a large area and mainly functions to provide a supporting counter force after contacting with the soil body and prevent the probe rod 1 from excessively sinking.
One end of the pressure-resistant cabin 3 is provided with a flange 7, and the flange 7 is connected with the cover body 62. The flange 7 is convenient for the installation and the disassembly of the pressure-resistant cabin 3.
in the probe 5, the shell 51 is in threaded connection with the probe rod 1, and a sealing ring is arranged between the shell 51 and the probe rod 1, so that sealing is realized, and the phenomenon that the real distribution rule of pore water pressure in sediment is influenced when pore water in the sediment enters the probe rod 1 is avoided.
a mounting hole 511 is provided in the housing 51, the sensor 52 is provided at the mounting hole 511, and one end of the mounting hole 511 communicates with the outside so that the sensor 52 can detect the pressure of the outside. In the present embodiment, one pore water pressure sensor and one soil pressure sensor are provided for each probe 5, and one mounting hole 511 is provided for each sensor 52. After the probe 5 penetrates into the soil body, the pore water pressure sensor bears the pore water pressure from the sediment, and the soil pressure sensor bears the soil pressure from the sediment.
the permeable stone 53 is arranged at the communication position of the pore water pressure sensor and the outside, so that the pressure of water is not influenced to act on the sensor 52, and the influence of sediment blocking on the sensor 52 on the measurement precision can be avoided. The stainless steel diaphragm 55 is arranged at the communication position of the soil pressure sensor and the outside, and the stainless steel diaphragm 55 seals the mounting hole 511, and mainly functions to transmit the horizontal pressure applied by the sediment to the soil pressure sensor.
In order to ensure reliability, the space between the stainless steel diaphragm 55 and the soil pressure sensor is filled with silicone oil. The soil pressure is applied to the stainless steel diaphragm 55, so that the stainless steel diaphragm 55 deforms towards the inner side of the mounting hole 511, the silicon oil between the soil pressure sensor and the stainless steel diaphragm 55 is squeezed, in order to keep the pressure balance, the pressure of the silicon oil rises to be equal to the soil pressure, and at the moment, the silicon oil transmits the pressure to the soil pressure sensor, and the soil pressure is measured through the soil pressure sensor. Considering that the measured value of the soil pressure sensor is the pressure after the hydrostatic pressure is eliminated, the soil lateral pressure should be the soil pressure after the hydrostatic pressure is eliminated, and when the effective lateral pressure needs to be calculated, the change of the pore water pressure needs to be considered.
It should be noted that since the stainless steel diaphragm 55 is vertically arranged, it can only bear the soil pressure from the horizontal direction, and thus the soil pressure in this embodiment is the horizontal soil pressure.
the threading passage 512 communicated with the accommodating cavity 11 is arranged in the shell 51, and the other end of the mounting hole 511 is communicated with the threading passage 512. Two ends of the threading channel 512 are provided with watertight plugs 54, one end of the watertight plug 54 is connected with the wiring of the sensor 52 penetrating in the threading channel 512, and the other end of the watertight plug 54 is connected with the lead penetrating in the accommodating cavity 11. The lower end of the threading channel 512 of the probe 5 at the bottommost end is blocked by a plug. In this embodiment, the pore water pressure sensor and the soil pressure sensor are located on both sides of the threading channel 512, respectively. Of course, the pore water pressure sensor and the soil pressure sensor may also be disposed on the same side of the threading channel 512.
The housing 51 is also provided therein with a pressure guide hole 513, and the pressure guide hole 513 communicates with the accommodation chamber 11. The pressure guide holes 513 mainly transmit seawater pressure to each probe rod 1, so as to prevent the probe rods 1 from being damaged due to excessive external pressure. In the present embodiment, two pressure guide holes 513 are provided on the housing 51 of each probe 5, and the extending direction of the pressure guide holes 513 is along the axial direction of the probe 5.
The embodiment of the invention also provides a shallow sea type seabed sediment pressure observation method, which adopts the shallow sea type seabed sediment pressure observation device and comprises the following steps:
laying: the shallow sea type submarine sediment pressure observation device is arranged in water, the detection value of a sensor is hydrostatic pressure, and the detection value of the sensor is gradually increased along with the increase of the water depth;
Penetration: along with the penetration of the cone tip into the soil body, the detection value of the pore water pressure sensor is the pore water pressure comprising the hydrostatic pressure, and the detection value of the soil pressure sensor is the soil pressure comprising the hydrostatic pressure; when the penetration is finished, the detection value of the pore water pressure sensor and the detection value of the soil pressure sensor are temporarily in a stable state;
And (3) observation: when waves, earthquakes and other loads act, the pressure in the sediment is changed, the detection value of the pore water pressure sensor and the detection value of the soil pressure sensor are changed, and the pressure value of the load attached to the sediment can be obtained by observing the change of the detection values.
the foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. a shallow sea type seafloor sediment pressure observation device, comprising:
the probe rod (1) is hollow to form an accommodating cavity (11), and the probe rod (1) comprises a plurality of section rods which are detachably connected;
the conical tip (2) is arranged at one end of the probe rod (1);
the pressure-resistant cabin (3) is arranged at the other end of the probe rod (1);
The data acquisition component (4) is arranged in the pressure-resistant cabin (3);
the probe (5) is arranged at the joint of the adjacent section rods, the probe (5) comprises a shell (51) and a sensor (52) arranged in the shell (51), one end of the sensor (52) is electrically connected with the data acquisition assembly (4), the other end of the sensor is communicated with the outside to detect the outside pressure, and the sensors (52) are of two types, namely a pore water pressure sensor and a soil pressure sensor.
2. shallow sea seafloor sediment pressure observation device according to claim 1, wherein a mounting hole (511) is formed in the housing (51), the sensor (52) is arranged in the mounting hole (511), and one end of the mounting hole (511) is communicated with the outside.
3. Shallow sea seafloor sediment pressure observation device according to claim 2, wherein a threading channel (512) communicated with the accommodating cavity (11) is arranged in the outer shell (51), and the other end of the mounting hole (511) is communicated with the threading channel (512).
4. Shallow sea seafloor sediment pressure observation device according to claim 2, wherein a pressure guide hole (513) is further arranged in the outer shell (51), and the pressure guide hole (513) is communicated with the accommodating cavity (11).
5. the shallow sea type seabed sediment pressure observation device as claimed in claim 1, wherein a permeable stone (53) is arranged at the communication position of the pore water pressure sensor and the outside, and a stainless steel diaphragm (55) is arranged at the communication position of the soil pressure sensor and the outside.
6. Shallow sea seafloor sediment pressure observation device according to any one of claims 1 to 5, wherein the data acquisition assembly (4) comprises:
The circuit board is arranged in the pressure-resistant cabin (3);
The wire penetrates through the accommodating cavity (11), one end of the wire is connected with the circuit board, and the other end of the wire is connected with the sensor (52).
7. The shallow sea type seabed sediment pressure observation device of any one of claims 1-5, wherein a base (6) is arranged between the pressure-resistant cabin (3) and the probe rod (1), the base (6) comprises a support plate (61) and a cover body (62), the support plate (61) is connected with the probe rod (1), and the cover body (62) is connected with the pressure-resistant cabin (3).
8. Shallow sea seafloor sediment pressure observation device according to claim 7, wherein the cross-sectional area of the support plate (61) is larger than the cross-sectional area of the probe (1).
9. Shallow sea seafloor sediment pressure observation device according to claim 7, wherein one end of the pressure resistant cabin (3) is provided with a flange (7), and the flange (7) is connected with the cover (62).
10. A shallow sea type seabed sediment pressure observation method, which uses the shallow sea type seabed sediment pressure observation apparatus according to any one of claims 1 to 9, comprising:
laying: the shallow sea type submarine sediment pressure observation device is arranged in water, the detection value of a sensor is hydrostatic pressure, and the detection value of the sensor is gradually increased along with the increase of the water depth;
Penetration: along with the penetration of the cone tip into the soil body, the detection value of the pore water pressure sensor is the pore water pressure comprising the hydrostatic pressure, and the detection value of the soil pressure sensor is the soil pressure comprising the hydrostatic pressure; when the penetration is finished, the detection value of the pore water pressure sensor and the detection value of the soil pressure sensor are temporarily in a stable state;
and (3) observation: when waves, earthquakes and other loads act, the pressure in the sediment is changed, the detection value of the pore water pressure sensor and the detection value of the soil pressure sensor are changed, and the pressure value of the load attached to the sediment can be obtained by observing the change of the detection values.
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| CN201910962923.8A CN110579307A (en) | 2019-10-11 | 2019-10-11 | Shallow sea type submarine sediment pressure observation device and method |
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| CN201910962923.8A CN110579307A (en) | 2019-10-11 | 2019-10-11 | Shallow sea type submarine sediment pressure observation device and method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111608651A (en) * | 2020-05-22 | 2020-09-01 | 中国计量大学 | Comprehensive detection device for mechanical characteristics and shallow gas of submarine sediments |
| CN111721581A (en) * | 2020-06-18 | 2020-09-29 | 中国海洋大学 | Seabed sand wave sediment sampling device and method |
| CN111735930A (en) * | 2020-05-12 | 2020-10-02 | 温州大学 | Integrated underground soil body measuring device |
| CN114088283A (en) * | 2021-11-19 | 2022-02-25 | 中国海洋大学 | Seabed super-pore pressure observation probe rod capable of automatically correcting zero drift in situ and observation method |
| CN114354406A (en) * | 2021-12-13 | 2022-04-15 | 中铁大桥勘测设计院集团有限公司 | Standard penetration test device and method based on energy correction |
| US20220341735A1 (en) * | 2020-02-25 | 2022-10-27 | Ocean University Of China | In-situ observation system for bottom boundary layer over shallow-water cohesive seabed and arrangement method thereof |
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| CN114354406A (en) * | 2021-12-13 | 2022-04-15 | 中铁大桥勘测设计院集团有限公司 | Standard penetration test device and method based on energy correction |
| CN114354406B (en) * | 2021-12-13 | 2023-11-28 | 中铁大桥勘测设计院集团有限公司 | Standard penetration test device and method based on energy correction |
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