CN1790017A - Multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil - Google Patents
Multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil Download PDFInfo
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- CN1790017A CN1790017A CN 200510045362 CN200510045362A CN1790017A CN 1790017 A CN1790017 A CN 1790017A CN 200510045362 CN200510045362 CN 200510045362 CN 200510045362 A CN200510045362 A CN 200510045362A CN 1790017 A CN1790017 A CN 1790017A
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Abstract
The invention discloses a hydraulic monitor rod of seabed soil multifunctional multipath pore in the sea detection technique domain, which is characterized by the following: the bottom of hydraulic monitor rod contains static CPT probe 5 and the top contains data sealing bin 1; several sectional interphase arrangements of detecting rod end connector 2 and hollow connection sleeve are connected between the data sealing bin 1 and static CPT probe 5. The invention can be used in the hard sand marine site of named 'steel sand', which is allocated safely at even slow speed to monitor different depths of wave and tide condition.
Description
(1) technical field
The present invention relates to a kind of device that is used to carry out marine original position soil feeler inspection and a plurality of different soil degree of depth pore water pressure synchronous monitoring, belong to the marine survey technology field.Be a kind of multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil specifically.
(2) background technology
Along with the exploitation of offshore oil and gas resource, more offshore engineering facility has appearred in China mainland frame shallow water marine site.Under abominable sea conditions, the high strength hydrologic process can make seabed soil that serious liquefaction takes place, thereby has cut down its load-bearing capacity greatly, and can give sea bed like this is the various engineering workses of ground, the especially consequence of bringing on a disaster property of offshore platform.The native liquefaction problem of base is the serious challenge to the marine resources development engineering, how to take precautions against, and has become the important subject of ocean scientific research circle at present.
The liquefaction of seafloor soil under the severe sea condition condition is because seafloor soil is subjected to the effect of wave, in order to address this problem, must carry out the investigation and the research of the dynamic response and the liquefaction property of seafloor soil under the ocean wave effect.Existing studies show that, technological means such as present sampling and testing method, on-the-spot original position dynamic sounding are difficult to obtain under the severe sea condition condition, and seafloor soil physico-mechanical properties, especially pore water pressure are with the change procedure of seabed hydrodynamic condition.If can be under the severe sea condition condition, unattended duty carry out marine on-the-spot actual observation, and then set up the response pattern of the relative hydrodynamical particular of seabed sand body nature parameters with these observation datas, and deduce the liquefaction trend of the bed load body that goes to sea with this, then can be the oceanographic engineering structures, foundation stability in particular for exploitation of offshore oil and gas platform and pipe laying, provide and derive from field measurement, very valuable basic evaluation data, this will have meaning to taking precautions against perils of the sea.
Desire is implemented such sea observation, and the monitoring equipment that the pore water pressure that just needs a cover to be laid in can to carry out long-term continuous recording seafloor soil different depth place in the submarine soil changes with wave action is for the anti-liquefaction design of oceanographic engineering facility provides parameter.Soil body monitoring pore water pressure is carried out in the land, often adopts flush type, and this at sea can't implement.Domestic and foreign literature by retrieval, domestic still do not have a similar device.The external PP system that has only U.S.'s development, the Lancelot system of Canada's development, these two kinds of instrument and equipments mainly are applicable to the liquefaction monitoring of Lu Po or bathyal weak soil body.Their injection in soil layer, be to use the freely falling body mode, can only go deep into soil layer downwards with self gravitation, and for China mainland frame shallow water chiltern marine site, especially for the extensive hard sea area that is commonly called as " iron plate sand " that distributing, only make it need go deep into the soil layer certain depth according to measuring with the feeler lever self gravitation, that's altogether beyond the reach of possibility, thereby the position of the embedded depth of two kinds of above-mentioned equipment and hole pressure sensor can't be determined.Above-mentioned instrument and equipment is the functions of use deficiency not only, can not record the seafloor soil physico-mechanical properties, also can not use in the environment in China marine site.
(3) summary of the invention
The present invention seeks in order to overcome the shortcoming in the above-mentioned technology, a kind of multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil is proposed, it is discharged in the seabed, can be used in China mainland frame shallow water chiltern marine site, especially be commonly called as the hard sea area of " iron plate sand " for extensive the distribution, can test the mechanical property of submarine soil: awl end resistance and side friction, and the automatic long term monitoring different depth place of energy submarine soil layer pore water pressure is with the responsive status of wave and morning and evening tides.
Purpose of the present invention is realized by following technical scheme: this multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil, static sounding (CPT) probe 5 is equipped with in its lower end, the upper end is equipped with number and is adopted gas-tight silo 1, it is characterized in that number adopt be connected with between gas-tight silo 1 and the static sounding probe 5 number save alternately measuring staff end connector 2 and the joint sleeve 3 of hollow.
For being threaded, also be threaded between static sounding probe 5 and the measuring staff end connector 2 between measuring staff end connector 2 alternately and the joint sleeve 3, measuring staff end connector 2 is adopted the bottom flange of gas-tight silo 1 for being welded to connect with number.
The two ends of measuring staff end connector 2 are cylindrical, on connecting thread 21 is arranged, the corresponding connection of internal thread with static sounding probe 5 links and joint sleeve 3 two ends has T shape seal groove 22 on the connecting thread limit of measuring staff end connector 2, T shape seal groove is embedded with sealing strip 6.Between measuring staff end connector 2 and the joint sleeve 3 be connected and with static sounding probe 5 between be connected because the effect of sealing strip 6, the water of outside can not enter joint sleeve 3 volume inside.
Eccentric through-hole 24 is arranged in the measuring staff end connector 2, be linked to be the passage of lead with the through hole in the middle of the joint sleeve that is connected alternately 3, on the side wall surface relative on the measuring staff end connector, aperture 25 is arranged with eccentric through-hole, the aperture is equipped with permeable stone 7, O-ring seal 8 is housed between permeable stone and the aperture, the water of permeable stone outside can enter in the aperture 25 of permeable stone the inside thoroughly from permeable stone, and enters in the tubular space of aperture the inside, and other impurity can not enter aperture 25.Back-up ring 9 is equipped with in the permeable stone outside, and back-up ring places in the interior groove of aperture, blocks permeable stone and can not come off.Pore water pressure probe 10 is housed in the tubular space that is connected with aperture, the pressure of the water that advances thoroughly by permeable stone, adopt module by the number that pore water pressure probe 10 process probe wire plugs 11 and lead number of ports are adopted in the gas-tight silo 1, number is adopted module time recording, storage data.
There is a circle to be used for the anchor clamps clamping on the outside wall surface of measuring staff end connector 2 to pressing down the holding tank 23 that passes through.Because each joint measuring staff end connector 2 all has a circle holding tank, the device that lays of feeler lever can the pointwise clamping feeler lever application of force, passes through to pressing down, and feeler lever can be not crooked and fractures, and guarantees feeler lever is placed the position of the different depth that measurement needs.
The warehouse 13 that number is adopted gas-tight silo and the storehouse of upper end lid 12 are connected by bolt, and the centre accompanies seal gasket 17, and the warehouse outside is equipped with and is lifted frame 18, and bracing frame 14 is installed in the warehouse, severally adopt module 16 and electric battery 15 places on the bracing frame respectively.Number is adopted the gas-tight silo good seal, and the water of outside can not enter number and adopt in the gas-tight silo, and number adopts module and electric battery all is sealed in the warehouse, has good watertightness and anti-seawater corrosion ability, guarantees data acquisition, stores and normally carry out.
It is to serve as the control core with embedded Rabbit3000 type high-performance low-power-consumption single-chip microcomputer that number is adopted data acquisition system (DAS)s in the module 16, the design of employing modular construction, static sounding probe 5 is CH01 and CH11, carry out behind the signal condition all being connected to the relay end points through signal amplifier AD620 with pop one's head in 10 CH0 and CH1 of pore water pressure, insert A/D data converter ADS7870 input end by resistance R 0 and R1, pore water pressure probe CH2-CH7 directly inserts A/D data converter ADS7870 input end by resistance R 2-R7.A/D data converter ADS7870 data output end and order control end insert Rabbit3000 single-chip data control port by the Data Control bus.FLASH program storage 29LF020B and SRAM dynamic storage ZS62Y512B data input/output terminal and order control end insert Rabbit3000 single-chip data control port by the Data Control bus.The data input/output terminal of data transmission level translator ADM3321E and MAX232 also inserts Rabbit3000 single-chip data input/output port by data bus, carries out level conversion, connects outer PC and usb data memory module respectively.The control end of power-supply controller of electric MAX603 and relay inserts Rabbit3000 single-chip processor i/o Data Control port respectively, by the order Control work.Electric battery inserts Rabbit3000 single-chip microcomputer, FLASH program storage, SRAM dynamic storage, pressure transducer, A/D data converter, signal amplifier, usb data memory module, power-supply controller of electric, and the power input Vc and the earth terminal of parts such as data transmission level translator, relay respectively by voltage stabilizer LM7812 and MIC5236 output terminal.
This multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil is discharged in the seabed, the mechanical property of test submarine soil, awl end resistance and side friction, and automatic long term monitoring different depth place soil layer pore water pressure is with the responsive status of wave and morning and evening tides.Owing to integrate static sounding probe and a plurality of pore water pressure is popped one's head in, and the number of being furnished with low-power consumption adopts module, can carry out time opening and closing control to the work of pore water pressure probe, and collection, storage and the playback of metric data.
The job step of multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil is:
1, at scene, tested point marine site, lay device with special use multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil slow at the uniform velocity pressure in submarine soil layer passed through, this moment, static sounding probe was measured resistance of feeler inspection end and frictional resistance automatically.When the predetermined soil of arrival is dark, press to pass through to stop.
2, the integral point or the least bit regularly start number and adopt module, and then soil layer pore water pressure force data is popped one's head in by pore water pressure, are adopted module by number and gather automatically and storage.
3, gather after 10 minutes, close number and adopt module, the then dormancy of pore water pressure surveying work; Arrive the integral point or the least bit again and start, stop automatically after 10 minutes and enter dormant state.
4, reclaim multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil with operation ship, and adopt the storage data of module in playback number on the bank or on the ship.
The present invention is placed on the data acquisition storage under water, automatic data acquisition and storage have been realized, advantage is simple in structure, handled easily control, can be used in China mainland frame shallow water chiltern marine site, especially be commonly called as the hard sea area of " iron plate sand " for extensive the distribution, can at the uniform velocity lay by the slow of safety, liquefaction influences research project about the same measuring point of soil mechanics amount to sea bed can to satisfy severe sea condition, synchronously, demand is surveyed on volume ground, the mechanical property of test submarine soil (awl end resistance and side friction), long term monitoring different depth place submarine soil layer pore water pressure has avoided the cable data transmission range long with the responsive status of wave and morning and evening tides automatically, signal noise is many, and the disadvantage such as fracture obliterated data etc. that meets accident, cable data transmission and storage have been compared, seabed self-tolerant data acquisition, store safer, reliably.
(4) description of drawings
Fig. 1 is a kind of structural representation of multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil,
Fig. 2 be A to view,
Fig. 3 is the C partial enlarged drawing,
Fig. 4 is the B partial enlarged drawing,
Fig. 5 is a measuring staff end connector cut-open view,
Fig. 6 is a measuring staff end connector end view drawing.
Fig. 7 is that number is adopted the gas-tight silo structural representation,
Fig. 8 is that number is adopted the structural representation that gas-tight silo has broken section,
Fig. 9 is the vertical view of Fig. 8,
Figure 10 is the A partial enlarged drawing,
Figure 11 is that number is adopted the circuit diagram of module
(5) embodiment
Embodiment of accompanying drawings.Fig. 1 represents a kind of specially capable multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil structural drawing that designs of seabed soil liquefaction field monitoring system that is.This multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil, doube bridge static sounding (CPT) probe 5 of its lower end is the electrical measurement static sounding probe, gas-tight silo 1 is adopted for number in its upper end.Number adopt be connected with between gas-tight silo 1 and the static sounding probe 58 joints alternately measuring staff end connector 2 and 3,8 measuring staff end connectors of joint sleeve of hollow on 8 pore water pressures be housed pop one's head in 10, as shown in Figure 5.The spacing of pore water pressure probe measures downwards from the feeler lever upper end, is spaced apart 0.5 meter within 2 meters, is spaced apart 1 meter below 2 meters.The cylindrical of 70 millimeters of diameters is made at the two ends of measuring staff end connector 2, above the internal thread at connecting thread 21 and joint sleeve 3 two ends and the pop one's head in corresponding connection of internal thread of 5 links of feeler inspection, there are 3 road T shape seal grooves 22 on connecting thread next door at the measuring staff end connector, be embedded with sealing strip 6, as shown in Figure 3, Figure 4.Pore water pressure probe 10 is contained in the tubular space that is connected with aperture 25, as Fig. 5, shown in Figure 2.Advance the pressure of the water in the aperture 25 thoroughly by permeable stone 7, adopt module by pore water pressure probe 10 through probe wire plugs 11 and lead number of ports, number is adopted module time recording data.O-ring seal 8 is housed between permeable stone and the aperture, and back-up ring 9 is equipped with in the permeable stone outside, blocks permeable stone and can not come off.There is a circle to be used for the anchor clamps clamping on the outside wall surface of measuring staff end connector 2 to pressing down the holding tank 23 that passes through, make and pass through downwards when pressing, whole multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil is slow at the uniform velocity downward, can be not crooked and damage, smoothly, the predetermined degree of depth arrives safe and sound.As Fig. 5, shown in Figure 6.As Fig. 5, shown in Figure 6.
The warehouse 13 that number is adopted gas-tight silo and the storehouse of upper end lid 12 are connected by bolt, and the centre accompanies seal gasket 17, and the warehouse outside is equipped with and is lifted frame 18, and bracing frame 14 is installed in the warehouse, severally adopt module 16 and electric battery 15 places in the bracing frame respectively.
It is to serve as the control core with embedded Rabbit3000 type high-performance low-power-consumption single-chip microcomputer that number is adopted data acquisition system (DAS)s in the module 16, the design of employing modular construction, system comprises single-chip microcomputer, FLASH program storage, SRAM dynamic storage, pressure transducer, A/D data converter, signal amplifier, usb data memory module, power-supply controller of electric, voltage stabilizer, reaches parts such as data transmission level translator, relay, by program command control mode switch pressure transducer power supply, realize the function of automatic data collection, storage, transmission.
The circuit that number is adopted module as shown in figure 10.Pore water pressure probe 10 is CH0-CH7 on circuit diagram, and static sounding probe 5 is CH01 and CH11 on circuit diagram.When data acquisition system (DAS) is worked, at first the Rabbit3000 single-chip microcomputer passes through, control bus sending controling instruction, order A/D data converter ADS7870 preliminary work, order power-supply controller of electric MAX603 to power up simultaneously, select acquisition channel and acquisition time according to program setting to sensor.When selecting the work of 2 passages, static sounding beachhead CH01 and CH11 are through signal amplifier AD620 and relay, insert A/D data converter ADS7870 by resistance R 0 and R1 and obtain the sampled signal data, during the work of 8 passages, pore water pressure probe CH0 and CH1 are that pore water pressure probe CH2-CH7 directly inserts A/D data converter ADS7870 by resistance R 2-R7 and obtains the sampled signal data by relay and resistance R 0 and R1 access A/D data converter.The Rabbit3000 single-chip microcomputer obtains the signal data row operation of going forward side by side by data bus and handles, and the result deposits in the SRAM 62Y5128B dynamic storage, judges simultaneously whether acquisition time finishes, and carries out continuous data collection, storage according to the time; Acquisition time finishes, order A/D data converter ADS7870 quits work, powered-down controller MAX603 opens serial data transmission level translator MAX232 and usb data memory module simultaneously to pore water pressure probe and static sounding probe outage, carries out data transmission; Behind the DTD, all control bus ports are closed in the order of Rabbit3000 single-chip microcomputer, and data acquisition system (DAS) changes the dormancy low power consumpting state over to, wait for that next working time state works on.
Claims (7)
1, a kind of multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil, static sounding (CPT) probe (5) is equipped with in its lower end, the upper end is equipped with number and is adopted gas-tight silo (1), it is characterized in that number adopt be connected with between gas-tight silo (1) and the static sounding probe (5) number save alternately measuring staff end connector (2) and the joint sleeve (3) of hollow.
2, according to the described multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil of claim 1, it is characterized in that between measuring staff end connector (2) and the joint sleeve (3) alternately for being threaded, also be threaded between static sounding probe (5) and the measuring staff end connector (2), measuring staff end connector (2) is adopted the bottom flange of gas-tight silo (1) for being welded to connect with number.
3, according to the described multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil of claim 2, the two ends that it is characterized in that measuring staff end connector (2) are cylindrical, on connecting thread (21) is arranged, the corresponding connection of internal thread with static sounding probe (5) link and joint sleeve (3) two ends, T shape seal groove (22) is arranged on the connecting thread limit of measuring staff end connector (2), and T shape seal groove is embedded with sealing strip (6).
4, according to the described multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil of claim 1, it is characterized in that eccentric through-hole (24) is arranged in the measuring staff end connector (2), be linked to be the passage of lead with the through hole in the middle of the joint sleeve that is connected alternately (3), on the side wall surface relative on the measuring staff end connector, aperture (25) is arranged with eccentric through-hole, the aperture is equipped with permeable stone (7), O-ring seal (8) is housed between permeable stone and the aperture, back-up ring (9) is equipped with in the permeable stone outside, pore water pressure probe (10) is housed in the tubular space that is connected with aperture, and its number of adopting in the gas-tight silo (1) by probe wire plug (11) and lead number of ports is adopted module.
5,, it is characterized in that having on the outside wall surface of measuring staff end connector (2) circle to be used for the anchor clamps clamping to pressing down the holding tank (23) that passes through according to the described multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil of claim 1.
6, according to the described multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil of claim 1, it is characterized in that counting the warehouse (13) of adopting gas-tight silo is connected with Cang Gai (12) bolt of upper end, the centre accompanies seal gasket (17), the warehouse outside is equipped with and is lifted frame (18), bracing frame (14) is installed in the warehouse, and number adopts module (16) and electric battery (15) places in the bracing frame respectively.
7, according to the described multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil of claim 6, it is characterized in that it is to serve as the control core with embedded Rabbit3000 type high-performance low-power-consumption single-chip microcomputer that number is adopted data acquisition system (DAS)s in the module (16), the design of employing modular construction, static sounding probe (5) CH01 is connected signal amplifier (AD620) to carry out all being connected to the relay end points with pore water pressure probe (10) CH0 and CH1 behind the signal condition with CH11, insert A/D data converter (ADS7870) input end by resistance R 0 and R1, pore water pressure probe CH2-CH7 directly inserts A/D data converter (ADS7870) input end by resistance R 2-R7; A/D data converter (ADS7870) data output end and order control end insert Rabbit3000 single-chip data control port by the Data Control bus; FLASH program storage (29LF020B) and SRAM dynamic storage (ZS62Y512B) data input/output terminal and order control end insert Rabbit3000 single-chip data control port by the Data Control bus; The data input/output terminal of data transmission level translator (ADM3321E and MAX232) also inserts Rabbit3000 single-chip data input/output port by data bus, carries out level conversion, connects outer PC and usb data memory module respectively; Power-supply controller of electric (MAX603) inserts Rabbit3000 single-chip processor i/o Data Control port respectively with the control end of relay; Electric battery inserts Rabbit3000 single-chip microcomputer, FLASH program storage, SRAM dynamic storage, pressure transducer, A/D data converter, signal amplifier, usb data memory module, power-supply controller of electric, and the power input Vc and the earth terminal of parts such as data transmission level translator, relay respectively by voltage stabilizer (LM7812 and MIC5236) output terminal.
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| CN 200510045362 CN1790017B (en) | 2005-12-12 | 2005-12-12 | Multifunctional multi-channel detection rod for monitoring pore water pressure of seabed soil |
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