CN105806412A - Annular detector for intelligent submarine pipeline soil mass axial actions - Google Patents
Annular detector for intelligent submarine pipeline soil mass axial actions Download PDFInfo
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- CN105806412A CN105806412A CN201610260474.9A CN201610260474A CN105806412A CN 105806412 A CN105806412 A CN 105806412A CN 201610260474 A CN201610260474 A CN 201610260474A CN 105806412 A CN105806412 A CN 105806412A
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Abstract
An annular detector for intelligent submarine pipeline soil mass axial actions is composed of an upper-layer supporting piece made from aluminum alloy, an annular shearing face, four fixing rods, a loading arm, four pore pressure sensors and four pore pressure sensor leads.Four fixing holes and four sensor lead holes are uniformly distributed in the upper-layer supporting piece at intervals.The upper-layer supporting piece and the annular shearing face are fixed through fixing rods distributed perpendicularly and uniformly.One end of the upper-layer supporting piece is perpendicularly fixed to the center of the upper-layer supporting piece, and the other end of the upper-layer supporting piece is connected to a control execution system of undersea detection equipment.The pore pressure sensors are fixed into the sensor holes in the annular shearing face.The perpendicular pore pressure sensors leads and the pore pressure sensors are connected and penetrate through the sensor lead holes in the upper-layer supporting piece to be fixed to the loading arm so as to be conveniently connected to a data collection system.The annular detector has the advantages that the detector can be effectively applied to field investigation of the early engineering stage, forceful technical support is provided for a submarine pipeline design project, and the engineering cost can be saved greatly on the premise of ensuring engineering safety and reliability.
Description
Technical field
The present invention relates to the prospecting of thalassic rock soil scene and monitoring field, particularly the annular detection instrument of a kind of intelligence submarine pipeline soil body axial action.
Background technology
Deep-sea or even field, ultra-deep sea is stepped into gradually along with submarine pipeline, traditional ditching landfill is implemented so that the scheme being entirely limited pipeline flexing and motion is difficult in deep-sea, therewith, lateral buckling (lateralbuckling) sea pipe design concept is suggested, the method having abandoned traditional setting stress (or moment) level and limit flexing, then by the means of controlled strain, utilize pre-designed lateral buckling, discharge the thermal expansion stress of High Temperature High Pressure sea pipe safe and effectively.
The extra large pipe design of lateral buckling makes construction convenient; cost is greatly reduced; but in running, the step start/stop machine operation of sea pipe makes the axial displacement of pipeline can produce ratcheting, is normally referred to as ratcheting (pipelinewalking).Along with the aggravation of ratcheting, axially can there is larger displacement in integrated piping, it is possible to the stress overload directly resulting in pipeline enclosure connector (spool) and end-equipment is destroyed.In addition, owing to presetting lateral flexing, whole pipeline be divide into the sub-pipes section that multistage is shorter, on the one hand along with the development of the axial displacement of whole sub-pipes section, the bending strain of the lateral buckling adjoined is likely to result in the buckling failure of local by its over compensation (excessivefeed-in), and on the other hand the characteristic that moves in circles of the expansion in running of the sub-pipes section and contraction is likely to result in the fatigue rupture of pipeline self.
Obviously, these potential hidden dangers in project (or the engineering accident occurred) are all closely bound up with the development degree of ratcheting, the axially-movable that how under the premise not increasing engineering cost too much, can efficiently control sea pipe has had changed into inevitable problem in engineering.Generally when not taking the measure of any restriction submarine pipeline axially-movable, the degree of ratcheting is limited to the critical frictional resistance that pipeline is axial, and therefore its accurate evaluation directly determines the relevant design and construction cost (as limited size and the quantity of the tub shallow foundation of pipeline) suppressing pipeline axially-movable.In existing design, often providing the higher limit of one group of pipe-soil friction coefficient and lower limit goes to consider approx the impact of pipeclay axial action, result is likely to result in section of tubing and has occurred and that unacceptable axially-movable or design specification are overly conservative.Its basic reason is owing to the axial frictional resistance design parameter of submarine pipeline has region and time domain polytropy, specifically, region polytropy be due to prolong lay pipeline the different geographical position soil body there is obvious inhomogeneities, the polytropy of time domain is the process of deployment (pipe sedimentation and consolidation subsequently) of pipeline, and running (the intermittent generation moved back and forth with consolidation) all can cause the change of the axial frictional resistance of pipeline.
In consideration of it, be necessary the ground inspection of the scene of a crime and the detection that carry out being correlated with in Submarine Pipeline Design early stage.Generally Site Detection can provide detailed soil layer texture structure and correlation engineering design parameter reliably, ensures the feasibility of whole engineering, safety and economy.Along with the development and progress of submarine rock and soil prospecting technique, a series of seabeds geotechnique's search equipment arises at the historic moment, and sole duty is in the precision and the reliability that improve important engineering parameter, so that effectively serving in the whole process of Submarine Pipeline Design, construction and operation.Such as, static sounding (ConePenetrationTesting-CPT) is widely used in the engineering objectives such as the soil classification (soilclassification) of detection seabed sandy soil, density (soildensity) and angle of friction (frictionangle)；T-bar shape (Tbar) injection detection is relatively used for the undrained shear strength of detection Marine Clay；And in order to effectively react the consolidation characteristics of submarine soil, the means of hole pressure touching methods (PiezoconePenetrationTesting-PCPT) are then used.But due to Submarine Pipeline Design complexity, all exploration equipment described above provide conventional relevant design parameter, can not effectively take into account the impact of submarine pipeline axially-movable, its reason is mainly, sea pipe, as the seabed shallow embedding works being widely used in deep-sea oil gas exploitation, relates to the mechanical characteristic of sea-bottom shallow (or top layer) soil body more.
Summary of the invention
It is an object of the invention to for above-mentioned technical Analysis, the annular detection instrument of a kind of intelligence submarine pipeline soil body axial action is provided, this detecting devices, disclose submarine pipeline thermal ratcheting, the engineering design index of the exploration sea-bottom shallow soil body: undrained shear strength index (clay) and the initial buried depth index of pipeline, pipeline consolidation settlement figureofmerit, the consolidation and sclerosis index of pipeline axial shear property index and the axial frictional resistance of pipeline, thus improving the inspection of the scene of a crime and the monitoring equipment of ocean ground, more structurally sound engineering parameter is provided for Submarine Pipeline Design, optimize traditional Submarine Pipeline Design scheme.
Technical scheme:
A kind of annular detection instrument of intelligence submarine pipeline soil body axial action, become by the upper strata support member of aluminum alloy material, annular shear surface, four fixing bars, loading arm, four sensor for pore water pressures and four sensor for pore water pressure lead wire set, the diameter of upper strata support member is 500mm, thickness is 15mm, upper strata support member four fixing holes uniformly at intervals and four sensor lead holes, circle center's diameter of a circle in eight holes is 400mm；Annular shear surface is solid construction, and its bottom surface is sphere, spherical diameter is 200mm, be 500mm, internal diameter for plane, plane external diameter is above 300mm；Four fixing holes and four gauge holes uniformly at intervals on annular shear surface, circle center's diameter of a circle in eight holes is 400mm；Upper strata support member is fixed by vertical four uniform fixing bars with annular shear surface, and the diameter of fixing bar is 150mm, is highly 200mm；The diameter of loading arm is 25mm, highly fixes for 500mm, its one end and upper strata support member central vertical, and the other end is connected in the control execution system of habitata equipment；Four sensor for pore water pressures are fixed in four gauge holes on annular shear surface；Four vertical sensor for pore water pressure lead-in wires are fixed with loading arm to be connected to data collecting system respectively with four sensor lead holes that four sensor for pore water pressures are connected and through upper strata support member.
The invention has the beneficial effects as follows:
This survey meter is effectively applied to the field exploring of engineering early stage, in order to provide more reliable and accurate design parameter for Submarine Pipeline Design subsequently.The more important thing is, a large amount of valuable data that examine on the spot can not only provide strong technical support for Submarine Pipeline Design project new from now on, and for saving cost further, optimize Submarine Pipeline Design scheme and provide the guarantee of necessity.Because using this equipment can effectively gather true experimental index (pipe laying and main body oil transportation (or natural gas) duct section initial settlement amount and soil body undrained shear strength and the stiffness index in installation process of a set of complete deep-sea pipeclay axial action, consolidation settlement in installation and debugging process, the axial shearing rigidity of pipeline in normal course of operation and the consolidation and sclerosis index etc. of critical axial frictional resistance), valuable data base is provided for setting up the reliable numerical simulator of science, and use economical and efficient rational numerical model means can save engineering cost undoubtedly under guaranteeing the reliable premise of engineering safety significantly in the Submarine Pipeline Design of similar seabed operating mode, fill up the blank of deep-sea inspection of the scene of a crime pipeclay axial action.
Accompanying drawing explanation
Fig. 1 is annular detection instrument perspective view.
Fig. 2 is annular detection instrument plan structure schematic diagram.
Fig. 3 is that structural representation looked up by annular detection instrument.
Fig. 4 is annular detection instrument side-looking structural representation.
In figure: 1, loading arm；2, sensor for pore water pressure lead-in wire；3, upper strata support member；4, fixing bar；5, sensor for pore water pressure；6, annular shear surface.
Detailed description of the invention
Embodiment:
A kind of annular detection instrument of intelligence submarine pipeline soil body axial action, as Figure 1-4, it is made up of the upper strata support member 3 of aluminum alloy material, annular 6, four fixing bars 4 of shear surface, 1, four sensor for pore water pressures 5 of loading arm and four sensor for pore water pressure lead-in wires 2, the diameter of upper strata support member 3 is 500mm, thickness is 15mm, upper strata support member is four fixing holes 4 and four sensor lead holes uniformly at intervals, and circle center's diameter of a circle in eight holes is 400mm；Annular shear surface 6 be solid construction, and its bottom surface is sphere, spherical diameter is 200mm, and to be plane, plane external diameter above be 500mm, internal diameter are 300mm；Four fixing holes and four gauge holes uniformly at intervals on annular shear surface 6, circle center's diameter of a circle in eight holes is 400mm；Upper strata support member 3 is fixed by vertical four uniform fixing bars 4 with annular shear surface 6, and the diameter of fixing bar 4 is 150mm, highly is 200mm；The diameter of loading arm 1 is 25mm, highly fixes for 500mm, its one end and upper strata support member 3 central vertical, and the other end is connected in the control execution system of habitata equipment；Four sensor for pore water pressures 5 are fixed in four gauge holes on annular shear surface 6；Four vertical sensor for pore water pressures lead-in wires 2 and four sensor for pore water pressures 5 are connected and through four sensor lead holes of upper strata support member 3 and fix to be connected to data collecting system with loading arm 1 respectively.
The technical Analysis of the present invention:
This annular detection instrument is laid and the considering of normal course of operation based on submarine pipeline actual installation, used three kinds of equivalet classes than means: the equivalent Analogy of the equivalet class ratio of submarine pipeline test process, detecting devices and submarine pipeline physical dimension equivalet class ratio and detecting devices and submarine pipeline motion mode and go out, undrained shear strength index (clay) needed for pipe installation process can be measured and buried depth index, install after the consolidation and sclerosis index of the axial shearing rigidity of pipeline and axial frictional resistance in pipeline consolidation settlement and running.
1. submarine pipeline test process equivalet class is than processing:
Considering that submarine pipeline is from laying the drainage condition being installed to the properly functioning whole process middle-shallow layer soil body, the test process of annular detection instrument is equally divided into three phases (referring to table 1):
1) the Pipe installing stage: actual self weight of pipeline is replaced by equivalence vertical load, generally can with vertical injection from the not draining operating mode controlled discrete time in installation process, and the initial tract buried depth in installation process；
2) consolidation stage after Pipe installing: the vertical load of equivalence of the consolidation pressure (i.e. self weight of pipeline) after actual Pipe installing is replaced, specifically, complete 1) stage test after, maintain the injection corresponding vertical force to target buried depth place, wait that pore water pressure thoroughly dissipates；
3) pipeline normal operating phase: the thermal ratcheting of temperature stress during by the conduit running of reality is replaced by the circulation shear turning to positive and negative alternate, and controlled the draining degree in shear history by different shear rates, controlled step consolidation time by turning to holdup time during positive anti-switching.
Table 1 annular detection instrument detection process equivalent process measure
2. annular detection instrument processes with sea pipe physical dimension equivalet class ratio:
Although be likely more simply with time-limited pipeline as the geometry of detecting devices and test correlation engineering parameter intuitively, but owing to it is in axial shear history, constantly bulldozing and will result in obvious end effect in two ends, therefore this patent have employed annular shear surface to avoid the end effect impact on result of detection.But, the annular detection instrument designed based on this theory is different from sea pipe in planform, so it need to be carried out legal equivalents analogy (referring to table 2) with sea pipe on the relevant parameter (see Fig. 1) of physical dimension, to facilitate direct detection correlation engineering design parameter.
Table 2 annular detection instrument and sea pipe equivalent process measure in physical dimension
3. annular detection instrument processes with sea pipe motion mode equivalet class ratio:
The introducing of the design philosophy of annular shear surface so that the axially-movable of true sea pipe can carry out equivalet class ratio with axial symmetry rotary motion, and Fig. 1 is shown in by corresponding stress analogy schematic diagram, and vertical extra large pipe motion processes without associated class ratio of entering.Additionally, in different test processs, corresponding equivalet class than parameter in Table 3.
Table 3 annular detection instrument and sea pipe carry out the relevant parameter conversion after motion mode equivalent process
The present invention borrows above-mentioned three kinds of equivalet classes to compare means, successfully the process of deployment of submarine pipeline and the normal course of operation in later stage are converted into the vertical injection test of annular detection instrument and rotational shear test, and in testing by effective data collecting system record annular detection instrument depth of penetration, level of sedimentation, shear distance, the torque responsive when time response of pore water pressure and the vertical load of applying and shearing, to obtain the Shear Strength Index of the shallow-layer soil body required in the pipe design of sea, coefficient of consolidation index, the key engineering design parameter such as axial frictional resistance index.
The concrete prospecting step of the present invention is as follows:
1. dive installation process: ensure that the pedestal of support test equipment is steadily seated the seabed position of prediction.
2. test the engineering parameter of submarine pipeline pavement process:
1) penetrating speed of annular survey meter is controlled, guarantee that it keeps not draining operating mode in penetration process, injection distance and time generally need to be set in advance in conjunction with the coefficient of consolidation of the soil body, this process adopts vertical displacement to control, time (t) in recording process, vertical displacement (w), vertical bearing capacity (V) and pore water pressure (P)；
2) preferably repeat to do the penetration process of a group, but switch to vertical force control, need to guarantee to be applied to the vertical deadweight being equivalent in concrete engineering sea pipe to load on annular detection instrument, it is ensured that the low direct stress state under real working condition；
3) maintain vertical force constant (V), wait that pore water pressure dissipates completely, record the time (t) in this consolidation process, vertical displacement (w) and pore water pressure (P).
3. test the engineering parameter of submarine pipeline normal course of operation:
1) annular detection instrument keeps constant rotational shear angular velocity, and alternately (often rotating 180 switching directions) rotates clockwise and counterclockwise, until not having obvious pore water pressure to change；
2) annular detection instrument keeps constant not draining rotational shear angular velocity, alternately (often rotating 180 switching directions) rotates clockwise and counterclockwise, but, a residence time is guaranteed during the switching of each direction of rotation, to shear the pore water pressure generating portion produced to dissipate, until not having obvious pore water pressure to change.
Note: the choosing of constant angular velocity of rotation needs to consider the coefficient of consolidation of the soil body in Practical Project, it is proposed that being worth for 0.0179deg/s, its corresponding operating mode is the initial buried depth of submarine pipeline is 0.5D, and the soil body is the Kaolin of normal consolidation.
The present invention not only can operate with the axially-movable mechanism of prospecting deep-sea pipeclay, measures relevant parameters of engineering design, and is suitable for the relevant monitoring that the non-landfill in shallow sea directly lays the axial pipeclay effect of sea pipe.Consider that existing ocean examines on the spot technology and means, this equipment can carry out the relevant consolidation index after surveying the undrained shear strength of the shallow-layer soil body and pipe laying (such as consolidation settlement by offshore drilling platform, the dissipation situation etc. of pore water pressure), best embodiment should the investigation vessel of incorporation engineering early stage, lay, in plan, the prospecting carrying out the pipeclay axial action of system in conduit region at interval of 15 kilometers (bigger measurement interval can be chosen at more uniform geologic province).First, annular detection instrument need to be connected with conventional ocean geotechnical investigation equipment by loading arm (referring to loading arm 1 in Fig. 2), that is: loading arm 1 is connected with the control execution system in exploration equipment and data collecting system after installation pressure transducer and survey torque sensor, and four sensor for pore water pressures 5 being arranged on bottom annular detection instrument are incorporated to data collecting system by lead-in wire 2；Meanwhile, in order to ensure the stability of annular detection instrument injection and rotation, whole base circle shear surface 6 is connected with a circular support face 3 at top by four cylindricality hollow pipes 4, and threadingly fixes with center loaded arm 1；Additionally, annular shear surface 6 need to be smeared corrosion protective covering and control consistent with true submarine pipeline of the roughness on surface.
Claims (1)
1. the annular detection instrument of an intelligent submarine pipeline soil body axial action, it is characterized in that: become by the upper strata support member of aluminum alloy material, annular shear surface, four fixing bars, loading arm, four sensor for pore water pressures and four sensor for pore water pressure lead wire set, the diameter of upper strata support member is 500mm, thickness is 15mm, upper strata support member four fixing holes uniformly at intervals and four sensor lead holes, circle center's diameter of a circle in eight holes is 400mm；Annular shear surface is solid construction, and its bottom surface is sphere, spherical diameter is 200mm, be 500mm, internal diameter for plane, plane external diameter is above 300mm；Four fixing holes and four gauge holes uniformly at intervals on annular shear surface, circle center's diameter of a circle in eight holes is 400mm；Upper strata support member is fixed by vertical four uniform fixing bars with annular shear surface, and the diameter of fixing bar is 150mm, is highly 200mm；The diameter of loading arm is 25mm, highly fixes for 500mm, its one end and upper strata support member central vertical, and the other end is connected in the control execution system of habitata equipment；Four sensor for pore water pressures are fixed in four gauge holes on annular shear surface；Four vertical sensor for pore water pressure lead-in wires are fixed with loading arm to be connected to data collecting system respectively with four sensor lead holes that four sensor for pore water pressures are connected and through upper strata support member.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442937A (en) * | 2016-10-14 | 2017-02-22 | 中交天津港湾工程研究院有限公司 | Novel marine shallow soil feature detection system and evaluation method thereof |
| CN112555689A (en) * | 2020-11-22 | 2021-03-26 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Multi-sensing pipeline state intelligent monitoring device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5726349A (en) * | 1995-05-18 | 1998-03-10 | United States Army Corps Of Engineers As Represented By The Secretary Of The Army | Automated cone penetrometer |
| WO2009151466A1 (en) * | 2008-06-11 | 2009-12-17 | Gregg Drilling & Testing, Inc. | Hydrostatically compensated deep sea probe with shear strain gauges |
| CN201901866U (en) * | 2010-09-30 | 2011-07-20 | 浙江大学 | T-shaped contact detector applied to deep-sea seabed feature testing |
| CN105424506A (en) * | 2015-11-29 | 2016-03-23 | 中南大学 | Seabed soil texture shearing and bearing strength mechanical property measuring system |
| CN105507225A (en) * | 2015-12-16 | 2016-04-20 | 东南大学 | Stoppable spherical cylindrical hole pressure probe |
| CN205719082U (en) * | 2016-04-22 | 2016-11-23 | 天津大学 | A kind of annular detection instrument of intelligence submarine pipeline soil body axial action |
-
2016
- 2016-04-22 CN CN201610260474.9A patent/CN105806412A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5726349A (en) * | 1995-05-18 | 1998-03-10 | United States Army Corps Of Engineers As Represented By The Secretary Of The Army | Automated cone penetrometer |
| WO2009151466A1 (en) * | 2008-06-11 | 2009-12-17 | Gregg Drilling & Testing, Inc. | Hydrostatically compensated deep sea probe with shear strain gauges |
| CN201901866U (en) * | 2010-09-30 | 2011-07-20 | 浙江大学 | T-shaped contact detector applied to deep-sea seabed feature testing |
| CN105424506A (en) * | 2015-11-29 | 2016-03-23 | 中南大学 | Seabed soil texture shearing and bearing strength mechanical property measuring system |
| CN105507225A (en) * | 2015-12-16 | 2016-04-20 | 东南大学 | Stoppable spherical cylindrical hole pressure probe |
| CN205719082U (en) * | 2016-04-22 | 2016-11-23 | 天津大学 | A kind of annular detection instrument of intelligence submarine pipeline soil body axial action |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106442937A (en) * | 2016-10-14 | 2017-02-22 | 中交天津港湾工程研究院有限公司 | Novel marine shallow soil feature detection system and evaluation method thereof |
| CN106442937B (en) * | 2016-10-14 | 2019-09-10 | 中交天津港湾工程研究院有限公司 | A kind of novel sea shallow-layer soil strength variation detection system and its appraisal procedure |
| CN112555689A (en) * | 2020-11-22 | 2021-03-26 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Multi-sensing pipeline state intelligent monitoring device |
| CN112555689B (en) * | 2020-11-22 | 2022-09-27 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Multi-sensing pipeline state intelligent monitoring device |
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