CN100570070C - The method of testing of geotechnical engineering original position rotation contact-surveying and special equipment thereof - Google Patents
The method of testing of geotechnical engineering original position rotation contact-surveying and special equipment thereof Download PDFInfo
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- CN100570070C CN100570070C CNB2006100143157A CN200610014315A CN100570070C CN 100570070 C CN100570070 C CN 100570070C CN B2006100143157 A CNB2006100143157 A CN B2006100143157A CN 200610014315 A CN200610014315 A CN 200610014315A CN 100570070 C CN100570070 C CN 100570070C
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Abstract
The present invention is a kind of geotechnical engineering original position rotation contact-surveying method of testing and special equipment thereof.This method changes reflection along the different engineering properties of the soil layer of change in depth with pressure F, rotation torque N, feed pressure W parameter and the magnitude numerical value thereof of continuous injection, can directly be used for carrying out the mechanics layering and main design parameters such as the bearing capacity of foundation soil of determining this layer soil, modulus of deformation, shear strength of soil layer.The underground test rod member that special equipment comprises readout instrument on the ground, is made up of the underground acquisition and storage device of feeler lever, probe and test data.The present invention had both kept the advantage of cone penetration method, can solve the indeterminable depth of exploration problem of static sounding again, and MTD can reach 80～100m, be a kind of effectively and measuring accuracy deep layer home position testing method accurately and reliably.
Description
Technical field
The present invention relates to a kind of geotechnical engineering original position rotation contact-surveying method of testing and special equipment thereof.
Background technology
Known static sounding is that the probe conical certain specification, that sensor is equipped with in inside at the uniform velocity is pressed in the soil layer by machinery, is a kind of method of testing of measuring Engineering Geologic Characteristics according to the probe resistance.Because the soft or hard difference of various soil layers in the stratum, the suffered resistance of popping one's head in is also different naturally, sensor gets off by cable transmission the vary in size signal of telecommunication of penetration resistance of this reflection to the surface recorder table record, by qualitative relationships between the Engineering Geologic Characteristics of penetration resistance and soil and statistical correlation relation, realize soil profile, bearing capacity of foundation soil is provided, selects the sharp bearing stratum of stake and gives the exploration purpose of estimating engineering geology data such as bearing capacity of single pile again.It has, and test is continuous, quick, precision is high, reproducibility good, function is many, has the characteristics of exploration and test double action concurrently.So cone penetration test has obtained using widely in engineer geological prospecting.But, for darker depth of exploration for example more than the 50m and the sand layer for example closely knit than hard formation, owing to reasons such as the static sounding penetrating power is not enough, earth anchor counter-force deficiency, feeler lever insufficient strength make probe be difficult to injection, therefore, cone penetration method can only be applicable to the test of the following shallow-layer geology of 40m.
Along with the continuous construction of projects such as highrise building, subway, high-speed railway, highrise building pile foundation, subway, high-speed railway abutment etc. require depth of exploration often 60～80m in addition more than, cone penetration method obviously can not satisfy the requirement of engineering geology test.
For Mi mends the more shallow defective of static sounding MTD, present stage can only substitute with a large amount of probings, sampling, laboratory test means.But eyesight is differentiated because alternative means exists, sampling is discontinuous, and practical problems such as the easy disturbance of soil sample make that deep layer geotechnical engineering measuring accuracy is difficult to guarantee.
Therefore how solving feeler inspection degree of depth problem, is a difficult problem of domestic and international project geological test.
Summary of the invention
The present invention can not satisfy the technical problem that depth of exploration requirements such as highrise building pile foundation, subway, high-speed railway abutment and the existing deep layer geotechnical investigation of the relatively poor and current employing alternative means of penetrability precision are difficult to guarantee in order to solve the static sounding method of testing, and the method for testing of disclosed a kind of geotechnical engineering original position rotation contact-surveying and special equipment thereof.
Rotation touch investigating method of testing of the present invention is made up of following steps:
1, the rotation touch investigating car is in place, carries out supporting leg, leveling;
2, mud sump is set, injects water or mud, rotation touch investigating car slush pump and swiveling faucet are by the pipeline connection mud sump;
3, on ground underground test rod member is connected in readout instrument on the ground through its communication interface, readout instrument is finished the procedure stipulation content on the ground, comprises sensor inspection, initial value setting and affirmation, clock setting, makes underground test rod member synchronous with ground readout instrument clock;
4, after on the ground readout instrument shows that underground test rod member initial value is normally stable, disconnect underground test rod member and being connected of readout instrument on the ground, readout instrument joins with the depth-registering device of popping one's head on the ground, and enters on-the-spot test option program;
5, drill bit is installed in the lower contact of underground test rod member, top connection was connected in the water drilling rod;
6, start slush pump with water or mud as flushing liquor, by swiveling faucet, cross water drilling rod, underground test rod member and drill bit delivery port and realize water circulation;
7, start the hydraulic operating system of rotation touch investigating car, drove water drilling rod, underground test rod member and drill bit by unit head and be rotated down injection with rotation and downward pressure effect, the pressure sensor of underground test rod member, torque sensor and hydraulic pressure sensor are exported the electric quantity signal of expression with the pressure of the continuous injection of change in depth, rotation torque, feed pressure continuously, and data acquisition property memory cycle of underground test rod member is gathered amplification, A/D conversion respectively and stored each sensor signal simultaneously and handles;
8, to desired depth, stop injection, rise and pulled out water drilling rod, underground test rod member and drill bit;
9, unload underground test rod member, be connected in readout instrument on the ground, the test data of underground test rod member collection storage is transferred on the ground readout instrument or unloading to data card by its communication interface;
10, readout instrument is set up respectively and pressure F, the rotation torque N of the corresponding continuous injection of time h and the relation curve of feed pressure W according to test data on the ground, and promptly F-h, N-h and W-h relation curve are browsed and printout relation curve or corresponding data.
Rotation touch investigating method of testing of the present invention also has following steps:
Describedly be transferred on the ground readout instrument or unloading, be transmitted in higher level's computer and carry out post processing to the test data of data card.
Rotation touch investigating test special equipment of the present invention is: form readout instrument on the ground by CPU, display, memory, communication interface and keyboard special, printer, readout instrument is provided with system control program on the ground; Underground test rod member is by the top connection that connected the water drilling rod, be connected in the tubular center tap of top connection bottom, be connected in the drive sleeve of tubular center tap bottom, be connected in the spigot of drive sleeve bottom, be connected in the torsion cover of spigot bottom and be connected in torsion cover bottom, and the lower contact that drill bit is installed constitutes the rod member main body, spigot supports and is fixed with the separation sleeve that is positioned at the torsion cover outside, tubular center tap and drive sleeve composition data acquisition memory cavity, the housings support of data acquisition memory is in spigot, top connection and tubular center tap surface are provided with overcoat, be provided with first between top connection and tubular center tap joint portion and the last overcoat and cross the hydrospace, top connection is provided with and was communicated with the raceway groove that water drilling rod and first is crossed the hydrospace, tubular center tap and lower contact surface are provided with down overcoat, following overcoat and drive sleeve, be provided with second between the separation sleeve and cross the hydrospace, second crosses the pairing lower contact in hydrospace is provided with the water hole that is communicated with the drill bit water channel, and the tubular center tap is provided with connection described first and crosses the raceway groove that the hydrospace is crossed in hydrospace and second; Torsion overlaps and fixes the resistance strain gage formation torsion torque sensor of its external surface, its top of chamber of internal thread cavity of the installation rotary drilling-head of lower contact is provided with the hydraulic pressure sensor that is made of bearing plate and resistance strain gage, lower contact top is provided with push rod, its end of blind pipe that is set in push rod is along being supported in the top connection medial extremity, constitute pressure sensor by push rod, blind pipe and the resistance strain gage that is fixed in the blind pipe external surface, top connection is provided with the wire hole of each sensor.
Special equipment of the present invention can also be taked following technical measures:
Described torsion overlaps its external surface and is provided with annular groove, and resistance strain gage is fixed in annular groove.
Described separation sleeve bottom engages with lower contact, is respectively equipped with O-ring seal between separation sleeve and the upper and lower joint.
Described lower contact, push rod, blind pipe and torsion cover are respectively equipped with the cable-through hole road that is communicated with the top connection wire hole.
Described top connection is provided with internal thread part, and data acquisition memory housing is threaded with this internal thread part.
Described data acquisition memory is provided with the barrel-type casing of band side cover, be provided with in the barrel-type casing and have analog quantity input signal shaping amplification circuit, master cpu, holder, the circuit board of clock circuit and communication interface and battery power, master cpu wherein, holder, clock circuit and communication interface constitute single-chip microcomputer, its number of input channel that shaping amplification circuit constitutes is corresponding with the number of Sensor Analog Relay System amount input, the output of shaping amplification circuit is connected in master cpu analog quantity input, clock circuit is synchronized with readout instrument on the ground, and the socket of communication interface plug connector is to be made of the seat ring of barrel-type casing end and the end cover that is threadedly connected to seat ring.
Beneficial effect of the present invention and advantage are: the pressure F of continuous injection of the present invention, rotation torque N, feed pressure W parameter are that drill bit is rotated down needed power when the soil body is cut destruction in the penetration process, specifically vertically to pressure F be equivalent to the penetration resistance Ps of static sounding, what its magnitude numerical value changed or the full curve variation is reflected is along the different engineering properties of the soil layer of change in depth, can directly be used for carrying out the mechanics layering and main design parameters such as the bearing capacity of foundation soil of determining this layer soil, modulus of deformation, shear strength of soil layer.The pressure F continuous parameters curve of reaction formation variation can intuitively and visually provide the section of a continuous soil layer engineering properties along change in depth, can be used for selecting soil supporting layer.
Level to rotation torque N be equivalent to static sounding side friction fs or vane-shear strength Cu, what its magnitude numerical value changed or the full curve variation is reflected is the soil layer difference engineering propertiess along change in depth, the plastic degree of the soil body of different soil nature, the main design parameters such as shear strength that can be used to carry out mechanics, physical property layering and determine this layer soil.
Feed pressure W is a drill bit delivery port place flushing liquor casting pressure, can directly reflect the dissipation pressure of flushing liquor to the different soil bodys, the plastic degree that promptly reflects the soil body, its magnitude numerical value changes or full curve changes reflection along the plastic degree of the soil body of the different soil nature of change in depth, can be used to carry out the physical property layering.This index also is the supplementary parameter of carrying out physical layering according to rotation torque N simultaneously.Concern by qualitative relationships between the Engineering Geologic Characteristics of penetration resistance and soil and statistical correlation again,
The test result that the test result that this method draws according to the qualitative relationships between the Engineering Geologic Characteristics of pressure F, rotation torque N, water pressure W continuous parameters curve and soil and statistical correlation relation and static sounding are visited example in a large number contrasts and fully proves, under same formation condition, the congeniality test data of two kinds of feeler inspection methods has obviously conforming synchronous corresponding relation, the effect that the stratum physical property that is reflected, mechanical strength change is identical, illustrates that rotation touch investigating method of the present invention has the measuring accuracy that is same as static sounding and accurately and reliably.
The test result warp of this method and probing, sampling, laboratory test and a large amount of comparative analysis of visiting routine data, fully prove under same formation condition, the also consistent synchronous corresponding relation of the congeniality test data of this feeler inspection method and alternative means, illustrate that rotation touch investigating method of testing of the present invention is exceeding the untouchable depth of stratum of static sounding, its measuring accuracy accurately and reliably.Because rotation touch investigating method of testing of the present invention has follow-on test, the effect that the stratum physical property that is reflected, mechanical strength change is better than alternative means.
The present invention is the test of finishing geologic parameter in the process of the bit cutting soil body and feedwater simultaneously, feedwater has the underground test rod member of cooling, discharges the effect of cutting the soil bits and reducing underground test rod member and soil layer friction, helps the equipment penetrating power overwhelming majority and passes to the bottom drill bit.
The drill bit of rotation touch investigating test is in drilling process, can not only guarantee the vertical property in feeler inspection hole, more importantly be under the cooperation of feedwater, can penetrate to realize the deep hole feeler inspection than hard formation, the exploration MTD that facts have proved this method can reach 80～100m, can satisfy depth of exploration requirements such as highrise building pile foundation, subway, high-speed railway abutment.
In a word, the present invention had both kept the advantage of cone penetration method, can solve the indeterminable depth of exploration problem of static sounding again, be a kind of effectively and measuring accuracy deep layer home position testing method accurately and reliably.
Description of drawings
Accompanying drawing 1 this method FB(flow block).
Accompanying drawing 2 is readout instrument embodiment display interface figure on the ground.
The rotation touch investigating block diagram of degree of depth 0-18.7m at the bottom of accompanying drawing 3-1 this method embodiment layer.
The rotation touch investigating block diagram of degree of depth 18.7-37.7m at the bottom of accompanying drawing 3-2 this method embodiment layer.
The rotation touch investigating block diagram of degree of depth 37.7-57.2m at the bottom of accompanying drawing 3-3 this method embodiment layer.
The rotation touch investigating block diagram of degree of depth 57.2-73.6m at the bottom of accompanying drawing 3-4 this method embodiment layer.
Accompanying drawing 4-1 and this method embodiment be the static sounding experimental curve diagram of end degree of depth 0-18.7m samely layer by layer.
Accompanying drawing 4-2 and this method embodiment be the cone penetration test curve map of end degree of depth 18.7-36m samely layer by layer.
Accompanying drawing 5-1 and this method embodiment be end degree of depth 37.7-54m alternative means bore hole columnar section samely layer by layer.
Accompanying drawing 5-2 and this method embodiment be end degree of depth 54-74m alternative means bore hole columnar section samely layer by layer.
Accompanying drawing 6 underground test rod member structural representations.
Accompanying drawing 7 underground test rod member structural profile schematic diagrames.
Accompanying drawing 8 Fig. 7 A portion zoomed-in views.
Accompanying drawing 9 each sensor construction generalized section of underground test rod member.
The data acquisition memory construction generalized section of accompanying drawing 10 underground test rod members.
Accompanying drawing 11 data acquisition memories electricity theory diagram.
The specific embodiment
Further specify the present invention below in conjunction with embodiment and accompanying drawing thereof.
Embodiment:
The operating procedure of present embodiment is described as follows in conjunction with Fig. 1:
1, rotation touch investigating car (rig) is in place, carries out hydraulic leg, hydraulic pressure casts anchor, and makes rotation touch investigating car leveling, stable.
2, mud sump is set, injects water or mud, by the slush pump and the swiveling faucet of pipeline connection mud sump, rotation touch investigating car, make draw water, feedwater, backwater be unimpeded.
3, before the feeler inspection operation, on ground underground test rod member is connected in readout instrument on the ground via communication interface, this communication interface is located in the data acquisition memory of underground test rod member, and readout instrument is finished the procedure stipulation content on the ground.
The special-purpose computer that the ground readout instrument is made up of CPU, display, memory, communication interface and keyboard special, printer, system program comprises on-site land survey program, data readback program, transducer calibration program, file previewer, system's setting program.Wherein on-site land survey program is mainly finished MTD record, surveillance operation conditions.The data readback program is mainly finished controls such as data acquisition, storage, transmission, printing.The transducer calibration program is mainly finished sensor inspection, initial value setting and affirmation, clock setting, makes underground test rod member synchronous with ground readout instrument clock.The file previewer is mainly finished the selection control of browsing the feeler inspection curve from readout instrument interface, ground, operations such as the moving of file, copy, deletion, rename.System's setting program is finished engineering name, hole number, the depth coefficient of mark test file and is measured the date, and curve generates, show and select and longitudinal and transverse grid scale is set; K value, moment of torsion k value, hydraulic pressure k value parameter are set between awl.
Fig. 2 is seen at the interface of readout instrument start on the ground, the display system program name is selective, " R " selects and acknowledgement key for system program in the keyboard special, " K1 ", " K2 ", " K3 ", " K4 " are respectively the subprogram of " R " key hit program and select and acknowledgement key, status indicator lamp respectively the video data acquisition state, enter after certain program controlled plant running status etc.
4, underground test rod member disconnect with the ground readout instrument be connected installation data acquisition memory end cover.The relevant interface of readout instrument and bit depth recorder are that the output of pin machine is joined on the ground, and readout instrument will write down the corresponding relation of bit depth and time on the ground.
5, drill bit is installed in the lower contact of underground test rod member, top connection was connected in the water drilling rod;
6, start slush pump with water or mud as flushing liquor, by swiveling faucet, cross water drilling rod, underground test rod member and drill bit delivery port and realize water circulation.
7, beginning feeler inspection operation, start the hydraulic system of rotation touch investigating car, drove water drilling rod, underground test rod member and drill bit by rig and be rotated down injection with rotation and downward pressure effect, the pressure sensor of underground test rod member, torque sensor and hydraulic pressure sensor are exported the voltage signal of expression with the pressure of the continuous injection of change in depth, rotation torque, feed pressure at once, and data acquisition property memory cycle of underground test rod member (the present embodiment cycle is set 0.5 second) is gathered amplifications, A/D conversion respectively and stored processing each sensor signal.
8, to desired depth 73.60m, stop injection, rise and pulled out water drilling rod, underground test rod member and drill bit.
9, unload the end cover of data acquisition memory in the underground test rod member, be connected in readout instrument on the ground by its communication interface, two machine communications, the test data with corresponding uplink time in the time of uplink time information is transferred to readout instrument on the ground, and perhaps unloading is to data card.
10, on the ground readout instrument is set up pressure F, rotation torque N and feed pressure W relation curve with the corresponding continuous injection of time h (being the degree of depth) respectively according to test data, be F-h, N-h and W-h relation curve, browse and print the output relation curve map or the corresponding data form file of A4 breadth.
11, be transferred to ground readout instrument or unloading to the test data of data card, be transmitted in higher level's computer by communication interface and carry out post processing, for example set up corresponding database and printout graph of relation or data form file.
Known theory and practice explanation, the feeler inspection test is according to the size variation of the forces associated of probe reflection soil layer to be carried out the mechanics layering, and on the mechanics hierarchical basis, carry out preliminary physical property layering, determine the soil layer title, and then for determining that bearing capacity of foundation soil, modulus of deformation, shear strength etc. provide main design parameters.
Forces associated that this method relates to and size variation thereof are for the mechanics layering of soil layer and the practice explanation of physical property layering, and above-mentioned theory is equally applicable to this rotation touch investigating method of testing, gives describing in detail with method of comparison below in conjunction with accompanying drawing.
Accompanying drawing 3-1,3-2 are the strata division block diagram of the foregoing description in degree of depth 1-36m scope at the bottom of the layer, F-h wherein, and N-h, W-h graph of relation are actual test curve figure.Indicate " F-h " after in the curve map, " N-h ", " W-h " expression curve title.
Measuring accuracy for checking this method, same stratum at distance present embodiment boring 1.0m adopts cone penetration method to test, the static sounding curve map of degree of depth 1-36m and corresponding strata division block diagram are shown in accompanying drawing 4-1,4-2 at the bottom of the gained layer, and " q is marked in the back in the curve map
Cx", " f
s" expression curve title.
Analyze above-mentioned two groups of accompanying drawings with depth correlation at the bottom of the identical layer, wherein the penetration resistance F of rotation touch investigating and static sounding conehead resistance q
CxCompare rotation touch investigating moment of torsion N and static sounding sidewall frictional resistance f
sCompare, rotation touch investigating water pressure W is as the supplementary parameter of strata division.Through comparative analysis as can be known: the comparable curve of two kinds of methods moves towards to change and conforms to its size variation of peak value of each degree of depth and serial relation curve, react strata division and mechanical property, physical property is consistent.Make a concrete analysis of as follows:
The layer end degree of depth 1.0m 1. the layer curve move towards identical, change point is degree of depth 1.0m place at the bottom of layer all.The strata division block diagram of static sounding is named to banketing, and rotation touch investigating penetration resistance F, moment of torsion N are all higher, and feed pressure W is lower, also meets more, the loose characteristics of fill stratum field trash fully, and its block diagram is also named to banketing.
Layer end degree of depth 3.2m 2. layer and 7.00m 3. layer curve move towards identical, change point is degree of depth 3.2m place at the bottom of layer all.2. layer is decided to be a clay to the static sounding block diagram, 3. layer is named and is silt clay.2. the characteristics that the layer penetration resistance F of rotation touch investigating, moment of torsion N, feed pressure W meet clay equally, and 3. layer penetration resistance F, moment of torsion N, feed pressure W all are lower than 2. layer, meet the lower characteristics of silt clay intensity fully, its block diagram is also named and is silt clay.
Layer end degree of depth 11.0m 4. layer curve move towards change all not obvious.Static sounding conehead resistance q
CxThan 3. layer silt clay is high slightly, name to be silty clay.And each parameter value of rotation touch investigating is all lower, and wherein penetration resistance F is also than 3. layer silt clay is high slightly, with static sounding conehead resistance q
CxSituation conforms to, so block diagram also is decided to be silty clay.
Layer end degree of depth 12.2m be layer 5., and static sounding is named and is silty clay, conehead resistance q
CxValue be approximately 4. the layer 2 times.The trend and the static sounding of rotation touch investigating curve are identical, and change point is more obvious, penetration resistance F also be approximately 4. the layer 2 times, so block diagram also is decided to be silty clay.
Layer end degree of depth 13.2m be layer 6., and static sounding is named and is clay, conehead resistance q
CxBe 5. the layer 0.74 times.Rotation touch investigating penetration resistance F, moment of torsion N are all lower, and feed pressure W is higher, meets the characteristics of clay fully, and penetration resistance F be 5. the layer 0.81 times, conform to static sounding, so block diagram also is decided to be silty clay.
Layer end degree of depth 14.5m be layer 7., and the peak value at 14.5m place all obviously increases, and static sounding is named and is silt, conehead resistance q
CxBe approximately 6. the layer 5 times.Rotation touch investigating penetration resistance F, moment of torsion N all obviously increase, and feed pressure W is significantly less than clay, meet closely knit, the hard characteristics of silt soil layer (the easier dissipation of silt feed pressure W relative tack soil) fully, penetration resistance F be approximately 6. the layer 3 times, conform to static sounding.
In like manner, the contrast of Fig. 3-1 and Fig. 4-1 degree of depth 15.1m, 17.8m, each layer of 18.7m at the bottom of layer, the contrast of Fig. 3-2 and Fig. 4-2 degree of depth 23.5m, 25.0m, 27.0m, 28.3m, 30.5m, 32.9m, 34.5m, 35.2m, each layer of 36m at the bottom of layer, moving towards of two groups of accompanying drawing curves is identical, change point is basic identical, same deep reaction formation mechanical property is named with lithology and is conformed to, and illustrates that this method is consistent with ripe static sounding announcement stratum, has equal accuracy and reliability.
But the parameter of we when reflecting short lap changes more obvious than static sounding very much, as the 6.70m-6.9m silt clay, 7.60-7.80m silty clay illustrates that this method can obviously reflect the mechanical property fine difference, so its measuring accuracy and reliability are better than cone penetration method.
Also can know from above analysis and to find out this method according to feed pressure W size and change and be easy to distinguish accurately cohesive soil and sand, silt (sand, the easier dissipation of silt feed pressure W relative tack soil), so this method also is better than cone penetration method to the order of accuarcy of stratigraphic division.
Be checking this method measuring accuracy shown in accompanying drawing 3-3,3-4, in the untouchable layer of static sounding end degree of depth 37.7-73.60m scope, same stratum at distance present embodiment boring 1.0m adopts the drill sampling alternative method to test, and the bore hole columnar section of degree of depth 37.7-74m is respectively shown in accompanying drawing 5-1,5-2 at the bottom of the gained layer.
Accompanying drawing 3-3,3-4 are the strata division block diagram of the foregoing description in degree of depth 37.7-73.60m scope at the bottom of the layer, F-h wherein, and N-h, W-h graph of relation are actual test curve figure.Indicate " F-h " after in the curve map, " N-h ", " W-h " expression curve title.
This method changes and trend according to penetration resistance F value, rotation torque N, feed pressure W value, carry out stratigraphic division according to aforementioned layering principle, analyze above-mentioned two groups of accompanying drawings with depth correlation at the bottom of the identical layer, through comparative analysis as can be known: this method curvilinear motion point place is consistent with the drill sampling demixing point, react strata division and mechanical property, physical property is consistent.Make a concrete analysis of as follows:
Degree of depth 37.8m, 38.5m, 40.0m, 41.4m, 42.6m, 43.2m, 44.6m, 47.8m, 51.0m, 54.0m, 57.2m, 59.6m, 61.5m, 62.2m, 64.3m, 65.7m, 66.8m, 68.5m, 69.6m, 70.2m, 71.8m, 73.6m place at the bottom of layer, the block diagram of two kinds of methods is all the soil layer separation, same deep reaction formation mechanical property is named with lithology and is conformed to, especially cohesive soil of this method and sand, silt separation are obvious unusually, illustrate that this method is consistent with the stratum that the drill sampling method is disclosed.And this method curve map can reflect accurately that very the energy force rate probing alternative means of short lap formation mechanical property is more obvious, as pressing from both sides silt in the 60.70-61.10m silty clay, 64.40-64.80m folder silt etc. in the silty clay illustrates that this method is compared with deep prospecting alternative means measuring accuracy to be significantly improved.
Because rotation touch investigating method of testing of the present invention has follow-on test, the effect that the stratum physical property that is reflected, mechanical strength change is better than alternative means.
Related equipment, the particularly special equipment of the foregoing description of this method is:
Ground is formed---
1, rotation touch investigating power-equipment comprises feeler inspection car (rig) and the static pressure and the rotary power unit that load.
2, circulating water supply system comprises swiveling faucet, water pump, crosses the water feeler lever.
3, ground readout instrument, the special-purpose computer that it is made up of CPU, display, memory, communication interface and QWERTY keyboard, printer, communication interface comprise the data transmission interface that connects higher level's computer.Readout instrument can be finished system calibrating, unified clock and reception, the various test datas of storage, printing test data or relation curve on the ground.
4, depth calibrator is the pin machine.
Underground composition---
1, crosses water feeler lever and drill bit;
2, be positioned at drill bit top, rotate synchronously with drill bit, the underground test rod member of injection, its structure is shown in Fig. 6,7,8.
As shown in Figure 6, feeler lever is a cylinder of carefully growing, and its diameter is suitable with the water drilling rod excessively that is connected.The underground test rod member surface visible parts of Fig. 6 has top connection 1, upward overcoat 2, tubular center tap 3, overcoat 4 and lower contact 5 down.The feeler lever upper end was threadedly connected to the water drilling rod by top connection 1, and the lower contact 5 of feeler lever lower end is used to the drill bit that is threaded.
Among Fig. 7, tubular center tap 3 is threadedly connected to top connection 1 bottom, and drive sleeve 6 is threadedly connected to the bottom of tubular center tap 3.The bottom of drive sleeve 6 is provided with spigot 8, and the external thread part that torsion overlaps 10 upper ends is threaded with spigot 8, and spigot 8 also is set with the separation sleeve 9 of torsion cover 10, and this separation sleeve 9 is fastening by the nut 13 of external thread part.The bottom of torsion cover 10 is threaded with lower contact 5, and tubular center tap 3 and drive sleeve 6 constitute the cavity that holds the data acquisition memory.The internal thread part of spigot 8 is threaded with barrel-type casing 7 bottoms of data acquisition memory.Spigot 8 is hollow joint, and its hollow part is a cable-through hole.
Among Fig. 7, top connection 1 is connected with overcoat 2 with tubular center tap 3 thread surfaces, is provided with first between top connection 1 and tubular center tap 3 joint portions and the last overcoat 2 and crosses the hydrospace, and top connection 1 is provided with and was communicated with the raceway groove 14 that water drilling rod and first is crossed the hydrospace.
Each sensor of installing in torsion cover 10 shown in Figure 7 and the torsion cover can be described as test probe, and its concrete structure is seen Fig. 9.
As shown in Figure 9, torsion overlaps 10 upper ends and is threaded with the external thread part of spigot 8, and the lower end is threaded with the external thread part of lower contact 5.The annular groove place that torsion overlaps 10 external surfaces is fixed with resistance strain gage 15 and constitutes torsion torque sensor.The external thread part of spigot 8 is set with and is positioned at the separation sleeve 9 that the torsion cover outside and its bottom engage with lower contact 5, and separation sleeve is fixed in top connection by clamp nut 13.Be respectively equipped with O-ring seal 16 between separation sleeve 9 and the upper and lower joint.
Its top of chamber of internal thread cavity of the installation rotary drilling-head of lower contact 5 is provided with the hydraulic pressure sensor that is made of bearing plate 17 and resistance strain gage 15, and is fixed by hollow clamp nut 18.Be provided with O-ring seal 16 between the internal thread cavity of bearing plate 17 and lower contact 5.
The internal thread cavity of hydraulic pressure sensor bottom is provided with the water hole 12 of connected chamber inside and outside, and its effect is that this probe waterworks in addition are connected with the rotary drilling-head water channel, and hydraulic pressure is transmitted to hydraulic pressure sensor.
The lower contact 5 tops push rod 19 that has been threaded, blind pipe 20 its ends that are set in push rod be along being supported in spigot 8 medial extremitys, constitutes pressure sensor by push rod 19, blind pipe 20 and the resistance strain gage 15 that is fixed in the blind pipe external surface.
The shaft shoulder inclined hole of the central shaft hole of lower contact 5, push rod 19 and blind pipe 20 1 ends constitute the cable-through hole road 21 of hydraulic pressure sensor holding wire along straight hole.Torsion overlap the straight hole at 10 annular groove places and blind pipe 20 other ends along straight hole constitute the torsion torque sensor holding wire cable-through hole road 21.The wire hole 22 that the hydraulic pressure sensor of drawing through relevant cable-through hole road 21 and the holding wire of torsion torque sensor are provided with from spigot 8 is drawn and is connected in the data acquisition memory.The holding wire of pressure sensor is directly drawn from the wire hole 22 of spigot 8 and is connected in the data acquisition memory.
The data acquisition memory construction of underground test rod member shown in Figure 7 is seen Figure 10,11.
As shown in figure 10, barrel-type casing 7 is provided with side cover 7-1, and the lower end of barrel-type casing is threadedly connected to the internal thread part of spigot 8.Circuit board 23 and battery power with analog quantity shaping amplification circuit, master cpu, holder, clock circuit and communication interface is set in the barrel-type casing.Each sensor signal lines of test probe is introduced circuit board by plug connector 24.The communication interface plug connector 25 of circuit board setting is located at the upper end of barrel-type casing, and seat ring 26 and thread seal are connected in the socket of the end cap 27 formation communication interface plug connectors 25 of seat ring.
As shown in figure 11, the RS232 communication interface IC8 of the master cpu chip IC 5 of data acquisition memory, holder chip IC 6, clock circuit IC7 and full duplex constitutes single-chip microcomputer.Analog quantity shaping amplification circuit IC1-4 constitutes four input channels, and it is corresponding with the number of sensor input analog amount.The output of each shaping amplification circuit is connected in the analog quantity input of master cpu chip IC 5, and clock circuit IC6 is synchronized with the clock of readout instrument on the ground.The battery power of present embodiment is arranged on circuit board shown in Figure 10 23.
Claims (8)
1, the method for testing of geotechnical engineering original position rotation contact-surveying is characterized in that being made up of following steps:
(1) the rotation touch investigating car is in place, carries out supporting leg, leveling;
(2) mud sump is set, injects water or mud, rotation touch investigating car slush pump and swiveling faucet are by the pipeline connection mud sump;
(3) on ground underground test rod member is connected in readout instrument on the ground through its communication interface, readout instrument is finished the procedure stipulation content on the ground, comprises sensor inspection, initial value setting and affirmation, clock setting, makes underground test rod member synchronous with ground readout instrument clock;
(4) after on the ground readout instrument shows that underground test rod member initial value is normally stable, disconnect underground test rod member and being connected of readout instrument on the ground, readout instrument joins with the depth-registering device of popping one's head on the ground, and enters on-the-spot test option program;
(5) drill bit is installed in the lower contact of underground test rod member, top connection was connected in the water drilling rod;
(6) start slush pump with water or mud as flushing liquor, by swiveling faucet, cross water drilling rod, underground test rod member and drill bit delivery port and realize water circulation;
(7) hydraulic operating system of startup rotation touch investigating car, drove water drilling rod, underground test rod member and drill bit by unit head and be rotated down injection with rotation and downward pressure effect, the pressure sensor of underground test rod member, torque sensor and hydraulic pressure sensor are exported the electric quantity signal of expression with the pressure of the continuous injection of change in depth, rotation torque, feed pressure continuously, and data acquisition property memory cycle of underground test rod member is gathered amplification, A/D conversion respectively and stored each sensor signal simultaneously and handles;
(8) to desired depth, stop injection, rise and pulled out water drilling rod, underground test rod member and drill bit;
(9) unload underground test rod member, be connected in readout instrument on the ground, the test data of underground test rod member collection storage is transferred on the ground readout instrument or unloading to data card by its communication interface;
(10) readout instrument is set up respectively and pressure F, the rotation torque N of the corresponding continuous injection of time h and the relation curve of feed pressure W according to test data on the ground, be F-h, N-h and W-h relation curve, browse, edit and print the output relation curve map and corresponding data, the cylindrical image form document of A4 breadth.
2, method of testing according to claim 1 is characterized in that: describedly be transferred on the ground readout instrument or unloading to the test data of data card, be transmitted in higher level's computer and carry out post processing.
3, the special equipment of geotechnical engineering original position rotation contact-surveying is characterized in that: form readout instrument on the ground by CPU, display, memory, communication interface and keyboard special, printer, readout instrument is provided with system control program on the ground; Underground test rod member is by the top connection that connected the water drilling rod, be connected in the tubular center tap of top connection bottom, be connected in the drive sleeve of tubular center tap bottom, be connected in the spigot of drive sleeve bottom, be connected in the torsion cover of spigot bottom and be connected in torsion cover bottom, and the lower contact that drill bit is installed constitutes the rod member main body, spigot supports and is fixed with the separation sleeve that is positioned at the torsion cover outside, tubular center tap and drive sleeve composition data acquisition memory cavity, the housings support of data acquisition memory is in spigot, top connection and tubular center tap surface are provided with overcoat, be provided with first between top connection and tubular center tap joint portion and the last overcoat and cross the hydrospace, top connection is provided with and was communicated with the raceway groove that water drilling rod and first is crossed the hydrospace, tubular center tap and lower contact surface are provided with down overcoat, following overcoat and drive sleeve, be provided with second between the separation sleeve and cross the hydrospace, second crosses the pairing lower contact in hydrospace is provided with the water hole that is communicated with the drill bit water channel, and the tubular center tap is provided with connection described first and crosses the raceway groove that the hydrospace is crossed in hydrospace and second; Torsion overlaps and fixes the resistance strain gage formation torsion torque sensor of its external surface, its top of chamber of internal thread cavity of the installation rotary drilling-head of lower contact is provided with the hydraulic pressure sensor that is made of bearing plate and resistance strain gage, lower contact top is provided with push rod, its end of blind pipe that is set in push rod is along being supported in the top connection medial extremity, constitute pressure sensor by push rod, blind pipe and the resistance strain gage that is fixed in the blind pipe external surface, top connection is provided with the wire hole of each sensor.
4, special equipment according to claim 3 is characterized in that: described torsion overlaps its external surface and is provided with annular groove, and resistance strain gage is fixed in annular groove.
5, special equipment according to claim 3 is characterized in that: described separation sleeve bottom engages with lower contact, is respectively equipped with O-ring seal between separation sleeve and the upper and lower joint.
6, according to the described special equipment of claim 3, it is characterized in that: described lower contact, push rod, blind pipe and torsion cover are respectively equipped with the cable-through hole road that is communicated with the top connection wire hole.
7, special equipment according to claim 3 is characterized in that: described top connection is provided with internal thread part, and data acquisition memory housing is threaded with this internal thread part.
8, special equipment according to claim 3, it is characterized in that: described data acquisition memory is provided with the barrel-type casing of band side cover, be provided with in the barrel-type casing and have analog quantity input signal shaping amplification circuit, master cpu, holder, the circuit board of clock circuit and communication interface and battery power, master cpu wherein, holder, clock circuit and communication interface constitute single-chip microcomputer, its number of input channel that shaping amplification circuit constitutes is corresponding with the number of Sensor Analog Relay System amount input, the output of shaping amplification circuit is connected in master cpu analog quantity input, clock circuit is synchronized with readout instrument on the ground on the ground, and the socket of communication interface plug connector is to be made of the seat ring of barrel-type casing end and the end cover that is threadedly connected to seat ring.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100143157A CN100570070C (en) | 2006-06-12 | 2006-06-12 | The method of testing of geotechnical engineering original position rotation contact-surveying and special equipment thereof |
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| CNB2006100143157A CN100570070C (en) | 2006-06-12 | 2006-06-12 | The method of testing of geotechnical engineering original position rotation contact-surveying and special equipment thereof |
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| CN100570070C true CN100570070C (en) | 2009-12-16 |
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| CN101126754B (en) * | 2007-09-25 | 2010-12-15 | 铁道第三勘察设计院集团有限公司 | Geotechnical engineering original position rotation contact-surveying vehicle |
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