CN100449063C - Dead load type subbase deformation measuring method and device - Google Patents
Dead load type subbase deformation measuring method and device Download PDFInfo
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- CN100449063C CN100449063C CNB2007100482841A CN200710048284A CN100449063C CN 100449063 C CN100449063 C CN 100449063C CN B2007100482841 A CNB2007100482841 A CN B2007100482841A CN 200710048284 A CN200710048284 A CN 200710048284A CN 100449063 C CN100449063 C CN 100449063C
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Abstract
The present invention relates to a method for measuring subbase deformation modulus and elastic modulus in the engineering construction and its equipment. Said invention provides a self-loading subbase deformation measurement method, said method includes the following steps: (1), drilling detection hole on the foundation to be detected; (2), mounting pressure-bearing plate, in the centre position of pressure-bearing plate a through hole is cut, at least one sensor is set; (3), making a draw bar with lower lock head be passed through the through hole and be placed in said detection hole; (4), making one end of said draw bar be connected with a fixed force transferring device; (5), applying force to said force-transferring device and detecting deformation quantity of said pressure-bearing plate; and (6), utilizing the deformation quantity of said pressure-bearing plate to obtain the subbase deformation modulus and elastic modulus.
Description
Affiliated technical field
The present invention relates to measure in the engineering construction method and the equipment thereof of foundation deformation modulus and modulus of elasticity.
Background technology
In the early stage of large-scale civil works such as dam, tunnel, highrise building etc., all need at first to measure the modulus of deformation and the modulus of elasticity (that is: young's modulus of elasticity) of ground, obtain the basic data of the deformation parameter of ground as engineering design and construction.
Present detection method is the position of measuring at needs, excavate experimental tunnel earlier, then use rigid bearing plate, force transfer bracket and test macro thereof, carry out the foundation deformation test, detection power during test generally should reach more than the 30T, must excavate footrill (mountain cave) as the counter-force supporter, so the cost height, can only in footrill, test mostly.
Because detection power is bigger, on the slope, side slope, plane ground position, require plummer the distortion of testing result in testing process, can not occur influencing, so plummer all designs and make very greatly.As adopting tunnel top to put forth effort the position then in the tunnel as bearing capacity, but said method not only cost is very high, the experiment duration is also very long.And existing detection mode is dug rock foundation at high escarpment, under fast and can't be carried out at all.
Summary of the invention
Technical problem to be solved by this invention provides a kind of method and equipment thereof of measurement young's modulus of elasticity simple in structure.
The present invention adopts technical solution technical scheme that problem adopts to be: dead load type subbase deformation measuring method may further comprise the steps:
(1) on the detection ground, in ground, bore the detection hole,
(2) bearing plate is installed on ground, the center of described bearing plate has through hole, and bearing plate is provided with at least one sensor,
(3) will pass above-mentioned through hole with the pull bar of lower lock head, and put into and detect in the hole,
(4) the pull bar end that exposes bearing plate is connected with the fixing force transfer device, and under the effect of fixing force transfer device, the lower lock head of pull bar is fastening with the peripheral wall that detects the hole,
(5), and detect the deflection of bearing plate by sensor to the fixing force transfer device application of force,
(6) deflection that records according to sensor and the functional relation of foundation deformation modulus and modulus of elasticity obtain foundation deformation modulus and modulus of elasticity.
Reach fastening in lower lock head described in the assay method of the present invention and the periphery that detects the hole frictional force by each other.
Another kind as assay method of the present invention improves, and the quantity of bearing plate upper sensor is 3～4, and is distributed on the bearing plate around detecting the hole.
The present invention adopts technical solution technical scheme that problem adopts that the equipment of realizing dead load type subbase deformation measuring method also is provided, comprise: the bearing plate of band through hole, bearing plate is provided with sensor, the fixing force transfer device is installed on bearing plate bestows detection power; The upper end of pull bar is connected with the said fixing load transfer device, and the lower end of pull bar is by the through hole of bearing plate, and is provided with lower lock head in the lower end of pull bar.
As a kind of improvement of equipment of the present invention, the lower lock head of pull bar lower end is that the periphery of above-mentioned overcoat has 3～4 axial pass troughs, is cone match between overcoat inboard and the pull bar at the overcoat of the periphery setting of pull bar.The external diameter of described outer casing internal diameter and pull bar lower end is for going up the little conical surface down greatly.
Another kind as equipment of the present invention improves, and described fixing force transfer device is the hollow hydraulic jack, and pull bar passes the middle part of above-mentioned hollow hydraulic jack and is fastenedly connected with the hollow hydraulic jack.
Adopt measuring method of the present invention, used innovatively by lower lock head and the periphery that detects the hole frictional force by each other to reach fastening, reduced the construction of having adopted footrill, the advantage of therefore have the certainty of measurement height, measuring period is short, cost is low etc.That its equipment has is simple in structure, be convenient to transportation, cost is low, can the reusable advantage of secondary, and be suitable for high escarpment, dig rock foundation etc. down fast and be difficult for setting up bearing capacity and put forth effort the place at position and detect test.
Description of drawings
Fig. 1 is a detection method schematic diagram of the present invention.
Fig. 2 is a pull bar and the schematic diagram that cooperates of lower lock head.
Fig. 3 is the schematic cross-section of lower lock head.
The specific embodiment
Measure the method for foundation deformation modulus and modulus of elasticity, may further comprise the steps:
(1) on the detection ground, in ground, bores the detection hole.
(2) bearing plate is installed on ground, the center of described bearing plate has through hole, and bearing plate is provided with at least one sensor.For the precision that guarantees to detect preferably is provided with 3～4 sensors, and be distributed on the bearing plate around, eliminate since in detection because the error that unbalance stress or other reasons cause.
(3) will pass above-mentioned through hole with the pull bar of lower lock head, and put into and detect in the hole.
(4) the pull bar end that exposes bearing plate is connected with the fixing force transfer device, and under the effect of fixing force transfer device, the lower lock head of pull bar is fastening with the peripheral wall that detects the hole.
(5), and detect the deflection of bearing plate by sensor to the fixing force transfer device application of force 〉=300KN.
(6) deflection that records according to sensor and the functional relation of foundation deformation modulus and modulus of elasticity obtain foundation deformation modulus and modulus of elasticity, and the deformation parameter of ground.
Below in conjunction with accompanying drawing assay method of the present invention and equipment are elaborated.
Embodiment one:
As shown in Figure 1, bore one with drilling rod according to test requirements document and detect hole 1 on ground, diameter is 3～7cm, the degree of depth 1.5～4m.It is that the circular steel plate of 30～60cm is made that through hole 3 of processing on bearing plate 2, bearing plate adopt diameter, and the through hole on the bearing plate 23 is alignd with detection hole 1.
The outside at bearing plate 2 is equipped with 3 dial gages as sensor 4 by support 8, above-mentioned 3 sensors, 4 uniform being arranged on the bearing plate 2.
After installation is passed through, give hollow jack 5 pressurizations, make pull bar 6 along with the pressurization of hollow jack 5 lifting that makes progress by pressure oil pump.Because between the overcoat 10 of pull bar 6 and lower lock head 7 is cone match, the bottom of pull bar 6 is in the lifting process, and the effect that overcoat 10 is subjected to pull bar 6 expands outwardly, and overcoat 10 produces huge frictional force with the sidewall chucking that detects hole 1, maintains static until pull bar 6.Continue again to apply pulling force for pull bar 4 by jack 5, jack 5 by pull bar 4 the most at last this pulling force be converted into the pressure that ground bears, detect the displacement of bearing plate 2 by sensor 6, by the relation of this displacement, pressure and modulus of deformation, modulus of elasticity, just can obtain the modulus of deformation and the modulus of elasticity of ground again.
Adopt above-mentioned detection method, equipment simple in structure, easy for installation re-assemblies use after can discharging after detection is finished, and therefore reduced cost.
Embodiment two:
Detecting the bearing plate 2 that 1 top, hole installation high strength is made, hydraulic cylinder is installed as fixing force transfer device 5 on bearing plate 2, the structure of lower lock head adopts hydraulic pressure breathing structure, and the hydraulic system of utilizing hydraulic cylinder is bestowed the power of expansion to lower lock head, do not increasing newly under the situation of other equipment like this, just can realize the effect of pull bar 6 bottoms locking.
Claims (10)
1, the method for dead load type subbase deformation measurement may further comprise the steps:
(1) on the detection ground, in ground, bore the detection hole,
(2) bearing plate is installed on ground, the center of described bearing plate has through hole, and bearing plate is provided with at least one sensor,
(3) will pass above-mentioned through hole with the pull bar of lower lock head, and put into and detect in the hole,
(4) the pull bar end that exposes bearing plate is connected with the fixing force transfer device, and under the effect of fixing force transfer device, the lower lock head of pull bar is fastening with the peripheral wall that detects the hole,
(5), and detect the deflection of bearing plate by sensor to the fixing force transfer device application of force,
(6) deflection that records according to sensor and the functional relation of foundation deformation modulus and modulus of elasticity obtain foundation deformation modulus and modulus of elasticity.
2, the method for dead load type subbase deformation measurement as claimed in claim 1 is characterized in that: the pulling force 〉=300KN of described fixing force transfer device.
3, the method for dead load type subbase deformation measurement as claimed in claim 1 is characterized in that: the periphery in described lower lock head and detection hole reaches fastening by frictional force each other.
4, the method for dead load type subbase deformation measurement as claimed in claim 1, it is characterized in that: the quantity of bearing plate upper sensor is 3～4, and is distributed on the bearing plate.
5, the equipment of dead load type subbase deformation measurement comprises: the bearing plate of band through hole, and bearing plate is provided with sensor, it is characterized in that: the fixing force transfer device is installed on bearing plate; The upper end of pull bar is connected with the said fixing load transfer device, and the lower end of pull bar is by the through hole of bearing plate, and is provided with lower lock head in the lower end of pull bar.
6, the equipment of dead load type subbase deformation measurement as claimed in claim 5, it is characterized in that: the lower lock head of pull bar lower end is provided with overcoat for the periphery at pull bar, the periphery of above-mentioned overcoat has 3～4 axial pass troughs, is cone match between overcoat inboard and the pull bar.
7, the equipment of dead load type subbase deformation measurement as claimed in claim 6 is characterized in that: the external diameter of described pull bar lower end is for going up the little conical surface down greatly.
8, the equipment of dead load type subbase deformation measurement as claimed in claim 5, it is characterized in that: lower lock head is a hydraulic pressure breathing structure.
9, the equipment of dead load type subbase deformation measurement as claimed in claim 5, it is characterized in that: described fixing force transfer device is the hollow hydraulic jack, pull bar passes the middle part of above-mentioned hollow hydraulic jack and is fastenedly connected with the hollow hydraulic jack.
10, the equipment of dead load type subbase deformation measurement as claimed in claim 4, it is characterized in that: described sensor is 3～4 dial gages, and uniform at the peripheral five equilibrium of bearing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100482841A CN100449063C (en) | 2007-01-16 | 2007-01-16 | Dead load type subbase deformation measuring method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100482841A CN100449063C (en) | 2007-01-16 | 2007-01-16 | Dead load type subbase deformation measuring method and device |
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| CN101003972A CN101003972A (en) | 2007-07-25 |
| CN100449063C true CN100449063C (en) | 2009-01-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102162234B (en) * | 2010-12-27 | 2012-10-31 | 北京工业大学 | Device and method for monitoring surface displacement of rock-soil body in real time |
| CN103017723B (en) * | 2012-12-22 | 2015-12-09 | 中冶集团武汉勘察研究院有限公司 | A kind of burying technology of lower monitoring mark embeddedly |
| CN106769501A (en) * | 2016-11-29 | 2017-05-31 | 中国电建集团华东勘测设计研究院有限公司 | A kind of measuring method of the Deformation Module of Rock Mass of different depth |
| CN107745535A (en) * | 2016-12-27 | 2018-03-02 | 福建永智机械设备有限公司 | A kind of garbage-compressing treating stations and its waste disposal method |
| CN110284529A (en) * | 2018-03-19 | 2019-09-27 | 天津大学（青岛）海洋工程研究院有限公司 | Foundation deformation measurement method and device in larger hydrocarbon platform construction |
| CN112709208A (en) * | 2020-12-29 | 2021-04-27 | 翁爱媚 | Self-loading type foundation deformation measuring equipment and method suitable for high and steep slope |
| CN115979811B (en) * | 2022-12-30 | 2024-02-23 | 吴志勇 | Rock mass dynamic-static deformation parameter same-body, same-direction and synchronous testing method |
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| US4649741A (en) * | 1985-08-22 | 1987-03-17 | Geomatic | Insitu soil shear measurement apparatus |
| JPH0372192A (en) * | 1989-08-10 | 1991-03-27 | Takenaka Komuten Co Ltd | Original position examination method and examination device to find young's modulus of nonviscous foundation by freezing original position foundation |
| CN2175933Y (en) * | 1993-11-24 | 1994-08-31 | 卢丽莎 | Deep-foundation flat load testing instrument |
| CN2263664Y (en) * | 1996-11-05 | 1997-10-01 | 王文臣 | Deep flat loading test device |
| CN2591602Y (en) * | 2002-12-24 | 2003-12-10 | 中国科学院武汉岩土力学研究所 | Stepped hole type axial deformation measuring means |
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2007
- 2007-01-16 CN CNB2007100482841A patent/CN100449063C/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4149409A (en) * | 1977-11-14 | 1979-04-17 | Shosei Serata | Borehole stress property measuring system |
| US4315429A (en) * | 1980-02-19 | 1982-02-16 | Morozov Viktor N | Method of determining deformation characteristics of construction materials and soil |
| SU1150299A1 (en) * | 1983-06-24 | 1985-04-15 | Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Гидротехники Им.Б.Е.Веденеева | Apparatus for determining soil elasticity modulus |
| US4649741A (en) * | 1985-08-22 | 1987-03-17 | Geomatic | Insitu soil shear measurement apparatus |
| JPH0372192A (en) * | 1989-08-10 | 1991-03-27 | Takenaka Komuten Co Ltd | Original position examination method and examination device to find young's modulus of nonviscous foundation by freezing original position foundation |
| CN2175933Y (en) * | 1993-11-24 | 1994-08-31 | 卢丽莎 | Deep-foundation flat load testing instrument |
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| CN101003972A (en) | 2007-07-25 |
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