CN104062229A - Around-pile soil side friction force detecting device and method - Google Patents
Around-pile soil side friction force detecting device and method Download PDFInfo
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- CN104062229A CN104062229A CN201410306255.0A CN201410306255A CN104062229A CN 104062229 A CN104062229 A CN 104062229A CN 201410306255 A CN201410306255 A CN 201410306255A CN 104062229 A CN104062229 A CN 104062229A
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Abstract
The invention relates to an around-pile soil side friction force detecting device. The around-pile soil side friction force detecting device comprises a support, a data collecting and processing controller, a power supplying device and a vertical loading barrel. The loading barrel is composed of two semi-cylindrical loading sheets and at least one lateral pressure loading device located in the loading barrel. The middle of the top of the support is fixedly provided with a vertical force loading device connected with the top of the loading barrel through a vertical force transmitting device, the ground near a test hole is fixedly provided with a vertical displacement detecting device connected with the vertical force transmitting device, the vertical force loading device and the lateral pressure loading device are respectively connected with the power supplying device through pipelines, and each pipeline is provided with a power value detecting or displaying device and a power valve. The power supplying device, the power value detecting or displaying devices, the power valves and the vertical displacement detecting device are connected with the data collecting and processing controller through circuits. The around-pile soil side friction force detecting device has the advantages of being high in detecting precision, short in detecting time and the like.
Description
Technical field
The present invention relates to detection technique field, be specifically related to all native side-friction force pick-up units of a kind of stake and all native side-friction force detection methods of stake.
Background technology
At present, the native side-friction force of stake week using in pile foundation engineering is generally that indirect mode is obtained, the mode of conventional indirect detection has mark to pass through test, lateral loading test and static sounding etc., adopts the data on the spot of the side-friction force that cannot obtain in this way the week soil of stake comparatively accurately.Separately there is the test mode that adopts entity stake, paste stress section in pile body side, an actual side-friction force that detects stake week soil, but this mode detection time is long, expense is high, and can not be applied to all engineerings.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of all native side-friction force pick-up units of stake and all native side-friction force detection methods of stake of obtaining the data that measuring accuracy is higher by direct-detection, and detection time is short, expense is lower and be widely used in various engineerings.
The technical scheme that the present invention solves the problems of the technologies described above is as follows:
The all native side-friction force pick-up units of a kind of stake, comprise support, data acquisition process controller, power supplying apparatus and the vertical loading cylinder arranging, describedly load cylinder forming with slide glass and at least one wall pressure charger by two semicircle tubulars, described in two with the cross section of slide glass mutually near and outer circumference surface relative, one end of described wall pressure charger is fixedly installed on described in two on the inwall with one of them of slide glass, and horizontal being fixed on another inwall with slide glass of the other end; Be drilled with instrument connection on ground, described loading cylinder is placed in described instrument connection, described support is fixedly installed on the described ground that loads cylinder top, on described support, be fixedly installed vertical force charger, described vertical force charger is positioned at directly over described loading cylinder, described vertical force charger connects the described top that loads cylinder by vertical force transfer device, is fixedly installed the vertical displacement pick-up unit that connects described vertical force transfer device near the ground described instrument connection; Described vertical force charger is connected described power supplying apparatus by pipeline respectively with wall pressure charger, on described pipeline, be equipped with power value detection or display device and dynamic valve, the position of described dynamic valve on described pipeline is near described power supplying apparatus, and described power value detection or the position of display device on described pipeline are near described dynamic valve and away from described power supplying apparatus; Described power supplying apparatus, power value detection or display device, dynamic valve and vertical displacement pick-up unit are by data acquisition process controller described in connection.
Further, described wall pressure charger and vertical force charger are hydraulic jack or hydraulic stem, and described power supplying apparatus is hydraulic oil pump, and described dynamic valve is hydraulic valve, and described power value detects or display device is hydralic pressure gauge.
Further, described wall pressure charger and vertical force charger are Pneumatic jack or atmospheric pressure pole, and described power supplying apparatus is air pump, and described dynamic valve is air pressure valve, and described power value detects or display device is rain glass.
Further, on the inwall with slide glass described in two, corresponding described wall pressure charger is fixedly installed respectively cross-brace piece, and described wall pressure charger is positioned at top or the bottom of described cross-brace piece.
Further, described vertical force transfer device is connecting rod or chain or steel cable.
Further, described vertical displacement pick-up unit is vertical displacement sensor.
The invention also discloses all native side-friction force detection methods of a kind of stake, adopt the above-mentioned all native side-friction force pick-up units of stake to detect, comprise the following steps:
S1, treating that geodetic is drilled with described instrument connection by drilling machine, the described loading cylinder assembling is vertically being put into the default position of described instrument connection;
S2, described support, data acquisition process controller, power supplying apparatus, vertical displacement pick-up unit and vertical force charger are installed near the ground described instrument connection one by one, connect described vertical force charger and load cylinder by vertical force transfer device, described vertical displacement pick-up unit connects described vertical force transfer device, and connects described pipeline and circuit;
S3, described power value detect or display device status checking, and described vertical displacement pick-up unit is set to original state;
S4, calculate the wall pressure (wall pressure that simulation concrete is given birth to local products at different depth after being fed in described instrument connection of correspondence position in described instrument connection by described loading cylinder depthometer of predeterminated position in described instrument connection, the i.e. pressure of soil to pile body side), provide power by power supplying apparatus described in the control of described data acquisition process controller for described wall pressure charger, described wall pressure charger produce wall pressure strut two described in slide glass, when the wall pressure of described wall pressure charger equates with the wall pressure of described loading cylinder position in described instrument connection, keep the wall pressure of described wall pressure charger now,
S5, by power supplying apparatus described in the control of described data acquisition process controller for described vertical force charger provides gradually the power increasing, drive described vertical force charger to produce vertical force to drive the described cylinder that loads produce the trend relatively moving and extremely move with the inwall of described instrument connection;
S6, described data acquisition process controller obtain power value detection or display device and the value of described vertical displacement pick-up unit in described loading cylinder moving process on the pipeline between described vertical force charger and described power supplying apparatus, forming load-displacement curve (is Q-S curve, its acquisition methods and stake static test national standard: " architecture foundation pile inspection specifications " JGJ106-2003 is identical), obtain by analysis treating native side-friction force of peg week.
Further, in step S4, when the wall pressure of described wall pressure charger equates with the wall pressure of described loading cylinder position in described instrument connection, dynamic valve described in the control of described data acquisition process controller between wall pressure charger and power supplying apparatus cuts out, to keep the wall pressure of described wall pressure charger now, keep constant with the wall pressure between slide glass and soil.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention adopts said structure, simulation stake static test, its device and process require to carry out according to stake static load examination criteria completely, the static load testing process of i.e. simulation stake detects a side-friction force for stake week soil, obtains that data, detection time that measuring accuracy is higher are short, expense is lower and be widely used in various engineerings by direct-detection.
Brief description of the drawings
Fig. 1 is loading cylinder mounting structure figure of the present invention.
Fig. 2 is data acquisition process controller operation circuit figure of the present invention;
Fig. 3 is Q-S curve map of the present invention.
In accompanying drawing, the list of parts of each label representative is as follows:
1, support, 2, vertical force transfer device, 3, half round platform piece, 4, cross-brace piece, 5, wall pressure charger, 6, instrument connection, 7, block, 8, with slide glass, 9, vertical displacement pick-up unit, 10, cross bar, 11, vertical force charger, 12, data acquisition process controller, 13, power supplying apparatus, 14, dynamic valve, 15, power value detect or display device.
Embodiment
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, example, only for explaining invention, is not intended to limit scope of invention.
As depicted in figs. 1 and 2, the all native side-friction force pick-up units of a kind of stake, comprise support 1, data acquisition process controller 12, power supplying apparatus 13 and the vertical loading cylinder arranging, load forming with slide glass 8 and two wall pressure chargers 5 by two semicircle tubulars, described in two with the cross section of slide glass 8 mutually near and outer circumference surface relative, one end of wall pressure charger 5 is fixedly installed on two one of them inwalls with slide glass 8, and what the other end was horizontal is fixed on another inwall with slide glass 8, two wall pressure chargers 5 are symmetrical arranged up and down in loading cylinder, be drilled with instrument connection 6 on ground, loading cylinder is placed in instrument connection 6, support 1 is fixedly installed on the ground that loads cylinder top, on support 1, be fixedly installed vertical force charger 11, vertical force charger 11 is positioned at and loads directly over cylinder, vertical force charger 11 connects by vertical force transfer device 2 top that loads cylinder, is fixedly installed the vertical displacement pick-up unit 9 that connects vertical force transfer device 2 near ground instrument connection 6, vertical force charger 11 is connected power supplying apparatus 13 by pipeline respectively with wall pressure charger 5, on pipeline, being equipped with power value detects or display device 15 and dynamic valve 14, the position of dynamic valve 14 on pipeline is near power supplying apparatus 13, and power value detection or the position of display device 15 on pipeline are near dynamic valve 14 and away from power supplying apparatus 13, power supplying apparatus 13, power value detection or display device 15, dynamic valve 14 and vertical displacement pick-up unit 9 are by connection data acquisition process controller 12.
In the present embodiment, wall pressure charger 5 and vertical force charger 11 are hydraulic jack or hydraulic stem, and power supplying apparatus 13 is hydraulic oil pump, and dynamic valve 14 is hydraulic valve, and power value detects or display device 15 is hydralic pressure gauge.Support 1 is trapezium structure, and vertical force charger 11 is fixedly installed on the middle part of the top margin of support 1.Two with the inwall of slide glass 8 on respective side pressure loading device 5 be fixedly installed respectively cross-brace piece 4, load cylinder internal upper part wall pressure charger 5 be positioned at the top of corresponding cross-brace piece 4, the wall pressure charger 5 of bottom is positioned at the bottom of corresponding cross-brace piece 4.Two tops with slide glass 8 are vertical respectively one-body moldedly has the geomery of half round platform piece 3, half round platform piece 3 bottoms to match with the corresponding top with slide glass 8, and the lower end of vertical force transfer device 2 is fixedly connected with the top of half round platform piece 3.Vertical force transfer device 2 is connecting rod, on connecting rod, is fixed with a cross bar 10 near the position that loads cylinder, and vertical displacement pick-up unit 9 is vertical displacement sensor, and its two ends connect respectively cross bar 10 and ground.The output terminal that loads the inwall respective side pressure loading device 5 of cylinder is fixedly installed block 7, for strutting with slide glass 8 with the output terminal secure fit of wall pressure charger 5.
Now explanation utilizes all native side-friction force detection methods of a kind of stake of the present embodiment, comprises the following steps:
S1, treating that geodetic is drilled with instrument connection 6 by drilling machine, the loading cylinder assembling is vertically put into the default position of instrument connection 6;
S2, support 1, data acquisition process controller 12, hydraulic oil pump, vertical displacement sensor and vertical force charger 11 (being hydraulic jack) are installed near ground instrument connection 6 one by one, connect vertical force charger 11 and load cylinder by connecting rod, vertical displacement sensor connects connecting rod, and connects pipeline and circuit;
S3, power value detect or display device 15 status checkings, and vertical displacement sensor makes zero;
S4, calculate the wall pressure of instrument connection 6 interior correspondence positions by loading cylinder at the depthometer of instrument connection 6 interior predeterminated positions, controlling hydraulic oil pump by data acquisition process controller 12 is that wall pressure charger 5 (being hydraulic jack) provides power, wall pressure charger 5 produces wall pressure and struts two with slide glass 8, when the wall pressure of wall pressure charger 5 equates with the interior wall pressure that loads cylinder position of instrument connection 6, keep the wall pressure of wall pressure charger 5 now;
S5, control hydraulic oil pump for vertical force charger 11 provides gradually the power increasing by data acquisition process controller 12, drive vertical force charger 11 to produce that vertical force upwards produces with the inwall of drive load cylinder and instrument connection 6 trend that relatively moves and to moving up;
S6, as shown in Figures 2 and 3, the value that hydralic pressure gauge on the pipeline between vertical force charger 11 and hydraulic oil pump and vertical displacement pick-up unit 9 are loading cylinder and move up in process is obtained in the 12 unit interval continuous sampling of data acquisition process controller, form Q-S curve, obtain by analysis treating native side-friction force of peg week.
In step S4, when the wall pressure of wall pressure charger 5 equates with the interior wall pressure that loads cylinder position of instrument connection 6, the dynamic valve 14 that data acquisition process controller 12 is controlled between wall pressure charger 5 and hydraulic oil pump cuts out, to keep the wall pressure of wall pressure charger 5 now, keep constant with the wall pressure between slide glass and soil.
The foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all; any amendment of doing, be equal to replacement, improvement etc.; for example; wall pressure charger 5 can also be air bag or mechanical linkage, within all should being included in protection scope of the present invention.
Claims (8)
1. all native side-friction force pick-up units of stake, it is characterized in that, comprise support (1), data acquisition process controller (12), power supplying apparatus (13) and the vertical loading cylinder arranging, described loading cylinder forming with slide glass (8) and at least one wall pressure charger (5) by two semicircle tubulars, described in two with the cross section of slide glass (8) mutually near and outer circumference surface relative, one end of described wall pressure charger (5) is fixedly installed on described in two on the inwall with one of them of slide glass (8), and what the other end was horizontal is fixed on another inwall with slide glass (8), be drilled with instrument connection (6) on ground, described loading cylinder is placed in described instrument connection (6), described support (1) is fixedly installed on the described ground that loads cylinder top, on described support (1), be fixedly installed vertical force charger (11), described vertical force charger (11) is positioned at directly over described loading cylinder, described vertical force charger (11) connects the described top that loads cylinder by vertical force transfer device (2), on near the ground described instrument connection (6), be fixedly installed the vertical displacement pick-up unit (9) that connects described vertical force transfer device (2), described vertical force charger (11) is connected described power supplying apparatus (13) by pipeline respectively with wall pressure charger (5), on described pipeline, being equipped with power value detects or display device (15) and dynamic valve (14), the position of described dynamic valve (14) on described pipeline is near described power supplying apparatus (13), and described power value detection or the position of display device (15) on described pipeline are near described dynamic valve (14) and away from described power supplying apparatus (13), described power supplying apparatus (13), power value detection or display device (15), dynamic valve (14) and vertical displacement pick-up unit (9) are by data acquisition process controller 12 described in connection.
2. all native side-friction force pick-up units of a kind of stake according to claim 1, it is characterized in that, described wall pressure charger (5) and vertical force charger (11) are hydraulic jack or hydraulic stem, described power supplying apparatus (13) is hydraulic oil pump, described dynamic valve (14) is hydraulic valve, and described power value detects or display device (15) is hydralic pressure gauge.
3. all native side-friction force pick-up units of a kind of stake according to claim 1, it is characterized in that, described wall pressure charger (5) and vertical force charger (11) are Pneumatic jack or atmospheric pressure pole, described power supplying apparatus (13) is air pump, described dynamic valve (14) is air pressure valve, and described power value detects or display device (15) is rain glass.
4. all native side-friction force pick-up units of a kind of stake according to claim 3, it is characterized in that, on the inwall with slide glass (8) described in two, corresponding described wall pressure charger (5) is fixedly installed respectively cross-brace piece (4), and described wall pressure charger (5) is positioned at top or the bottom of described cross-brace piece (4).
5. all native side-friction force pick-up units of a kind of stake according to claim 4, is characterized in that, described vertical force transfer device (2) is connecting rod or chain or steel cable.
6. according to all native side-friction force pick-up units of a kind of stake described in claim 1 to 5 any one, it is characterized in that, described vertical displacement pick-up unit (9) is vertical displacement sensor.
7. all native side-friction force detection methods of stake, is characterized in that, adopt all native side-friction force pick-up units of a kind of stake as described in claim 1 to 6 any one to detect, and comprise the following steps:
S1, treating that geodetic is drilled with described instrument connection (6) by drilling machine, the described loading cylinder assembling is vertically being put into the default position of described instrument connection (6);
S2, described support (1), data acquisition process controller (12), power supplying apparatus (13), vertical displacement pick-up unit (9) and vertical force charger (11) are installed near the ground described instrument connection (6) one by one, connect described vertical force charger (11) and load cylinder by vertical force transfer device (2), described vertical displacement pick-up unit (9) connects described vertical force transfer device (2), and connects described pipeline and circuit;
S3, described power value detect or show device (15) status checking, and described vertical displacement pick-up unit (9) is set to original state;
S4, calculate the wall pressure of correspondence position in described instrument connection (6) by described loading cylinder depthometer of predeterminated position in described instrument connection (6), control described power supplying apparatus (13) by described data acquisition process controller (12) and provide power for described wall pressure charger (5), described wall pressure charger (5) produce wall pressure strut two described in slide glass (8), when the wall pressure of described wall pressure charger (5) equates with the wall pressure of described loading cylinder position in described instrument connection (6), keep the wall pressure of described wall pressure charger (5) now,
S5, control described power supplying apparatus (13) for described vertical force charger (11) provides gradually the power increasing by described data acquisition process controller (12), drive described vertical force charger (11) to produce vertical force to drive the described cylinder that loads produce the trend relatively moving and extremely move with the inwall of described instrument connection;
The power value that S6, described data acquisition process controller (12) unit interval continuous sampling are obtained on the pipeline between described vertical force charger (11) and described power supplying apparatus (13) detects or display device (15) and the value of described vertical displacement pick-up unit (9) in described loading cylinder moving process, form load-displacement curve, described load-displacement curve obtains treating native side-friction force of peg week by analysis.
8. all native side-friction force detection methods of a kind of stake according to claim 7, it is characterized in that, in step S4, when the wall pressure of described wall pressure charger (5) equates with the wall pressure of described loading cylinder position in described instrument connection (6), the dynamic valve (14) that described data acquisition process controller (12) is controlled between described wall pressure charger (5) and power supplying apparatus (13) cuts out, to keep the wall pressure of described wall pressure charger (5) now, constant with the wall pressure between slide glass (8) and soil described in keeping.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410306255.0A CN104062229A (en) | 2014-06-30 | 2014-06-30 | Around-pile soil side friction force detecting device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410306255.0A CN104062229A (en) | 2014-06-30 | 2014-06-30 | Around-pile soil side friction force detecting device and method |
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| CN104062229A true CN104062229A (en) | 2014-09-24 |
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| CN201410306255.0A Pending CN104062229A (en) | 2014-06-30 | 2014-06-30 | Around-pile soil side friction force detecting device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104314108A (en) * | 2014-10-20 | 2015-01-28 | 中冶沈勘工程技术有限公司 | Inverse analysis method for determining pile foundation and pile soil strength parameters |
| CN106706442A (en) * | 2017-03-05 | 2017-05-24 | 南京大学 | Testing device and testing method for testing normal contact stress of pile-soil interface under variable temperature condition |
| CN106769478A (en) * | 2017-01-23 | 2017-05-31 | 浙江大学 | A kind of pile-soil interface shearing test device |
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| US4773259A (en) * | 1987-06-12 | 1988-09-27 | Iowa State University Research Foundation, Inc. | Modified borehole shear tester |
| JPH07134087A (en) * | 1993-11-09 | 1995-05-23 | Hideaki Kishida | Vertical load tester for pile |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314108A (en) * | 2014-10-20 | 2015-01-28 | 中冶沈勘工程技术有限公司 | Inverse analysis method for determining pile foundation and pile soil strength parameters |
| CN106769478A (en) * | 2017-01-23 | 2017-05-31 | 浙江大学 | A kind of pile-soil interface shearing test device |
| CN106706442A (en) * | 2017-03-05 | 2017-05-24 | 南京大学 | Testing device and testing method for testing normal contact stress of pile-soil interface under variable temperature condition |
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