CN102061687A - Analytical method for determining soil body intensity parameter by in-situ static penetration test - Google Patents
Analytical method for determining soil body intensity parameter by in-situ static penetration test Download PDFInfo
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- CN102061687A CN102061687A CN 201010580609 CN201010580609A CN102061687A CN 102061687 A CN102061687 A CN 102061687A CN 201010580609 CN201010580609 CN 201010580609 CN 201010580609 A CN201010580609 A CN 201010580609A CN 102061687 A CN102061687 A CN 102061687A
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Abstract
The invention discloses an analytical method for determining a soil body intensity parameter by an in-situ static penetration test, relating to the technical field of analytical methods for determining soil body intensity parameters by in-situ static penetration tests on the aspect of rock soil. The method comprises the following steps of: firstly, establishing a static penetration test numerical analysis model; taking a minimum error function of static penetration test numerical calculated penetration resistance and actually measured penetration resistance as a garget function, wherein the penetration resistances include lateral friction resistance and end resistance; optimizing the target function by applying a nonlinear optimization algorithm, combining a numerical calculation with a nonlinear optimal inversion method, rapidly converging to a globally optimal solution through repeated iteration; and determining the optimal value of the intensity parameter of soil to be determined, and establishing a correspondence between the actually measured penetration resistance and the soil body intensity parameter, wherein the soil body intensity parameter includes cohesion and internal friction angles. The aims of sensible simulation of the penetration process of a probe in the static penetration test, small errors and accurate and reliable intensity parameter are achieved.
Description
Technical field
The present invention relates to the original position cone penetration test of ground aspect and determine the technical field of soil strength parameters analysis method.
Background technology
Static sounding is will pop one's head in static(al) at the uniform velocity to be pressed in the soil by given pace, measures its penetration resistance (conehead resistance, sidewall frictional resistance) continuously.Static sounding is a kind of simple, accurate, quick and economic rock-soil engineering in-situ method of testing.Can be used for: 1. divide soil layer, judge the soil layer classification, find out soft, hard interbedded layer and soil layer uniformity in level and vertical direction; 2. estimate the engineering properties (allowable bearing, compression property, undrained shear strength, level are to the coefficient of consolidation, saturated sand liquefaction potential, sand compactness etc.) of foundation soil; 3. seek and definite pile-base supporting layer, estimate driven pile pile sinking possibility and bearing capacity of single pile; 4. check artificial earth fill's compactness and ground stabilization effect.
The shear strength of soil is meant the limit capacity of soil body opposing shear failure, is one of important mechanical property of soil.Problems such as the Foundation Pit Support Design in the engineering, bearing capacity of foundation soil, slight slope are stable are all directly related with the shear strength of soil.The intensity parameter (cohesion and angle of internal friction) of soil is the important parameter with the intensity relevant works problem of soil.
Penetration resistance (conehead resistance, sidewall frictional resistance) in the cone penetration test test penetration process can not directly provide native intensity parameter.The researcher is according to the strength test and the on-the-spot cone penetration test correlation data of indoor soil, set up the correlation experience relation, for example can be with table look-up modulus of deformation, cohesion and the angle of internal friction of liquidity index, clay and silty clay of density, modulus of deformation, angle of internal friction, slity soil and the cohesive soil of determining sand of the probe resistance of static sounding.But said method is mainly the provincialism empirical formula, and injection mechanism is unclear, uses extensive inadequately.
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Summary of the invention
The object of the invention provides the penetration process of popping one's head in a kind of simulation cone penetration test that relatively gears to actual circumstances, and error is little, the analytical method that the intensity parameter that obtains is accurate, the soil strength parameter is determined in original position cone penetration test reliably.
The analytical method of soil strength parameter is determined in a kind of original position cone penetration test, comprises the steps:
The first step: at first set up the cone penetration test numerical analysis model, wherein this structure of soil adopts mole enclosed pasture model, and probe adopts elastic model, and the finite element geometrical model adopts the large deformation model;
Second step: as object function, described penetration resistance comprises side friction and end resistance to the first step cone penetration test numerical computations penetration resistance that obtains and the smallest error function of surveying penetration resistance;
The 3rd step: use the nonlinear optimization algorithm second object function that goes on foot is optimized, numerical computations and nonlinear optimization inversion method are combined, make it rapidly converge to globally optimal solution by iterating;
The 4th step: thus the optimal value of the intensity parameter of definite soil undetermined is set up the corresponding relation between actual measurement penetration resistance and the geotechnical body intensity parameter, and described geotechnical body intensity parameter is cohesion and angle of internal friction.
The present invention adopts technique scheme, compared with prior art has following advantage: utilize the penetration resistance of penetration resistance and actual measurement of the intensity parameter prediction of inverting to coincide better, error is little, illustrate that this method can well simulate the penetration process of popping one's head in the cone penetration test, the intensity parameter that obtains accurately, has reliably solved cone penetration test and can not directly obtain a native intensity parameter difficult problem.
The specific embodiment
The analytical method of soil strength parameter is determined in original position cone penetration test of the present invention, comprises the steps:
The first step: at first set up the cone penetration test numerical analysis model, wherein this structure of soil adopts mole enclosed pasture model, and probe adopts elastic model, and the finite element geometrical model adopts the large deformation model;
Second step: as object function, described penetration resistance comprises side friction and end resistance to the first step cone penetration test numerical computations penetration resistance that obtains and the smallest error function of surveying penetration resistance;
The 3rd step: use the nonlinear optimization algorithm second object function that goes on foot is optimized, numerical computations and nonlinear optimization inversion method are combined, make it rapidly converge to globally optimal solution by iterating;
The 4th step: thus the optimal value of the intensity parameter of definite soil undetermined is set up the corresponding relation between actual measurement penetration resistance and the geotechnical body intensity parameter, and described geotechnical body intensity parameter is cohesion and angle of internal friction.
Claims (1)
1. the analytical method of soil strength parameter is determined in an original position cone penetration test, it is characterized in that comprising the steps:
The first step: at first set up the cone penetration test numerical analysis model, wherein this structure of soil adopts mole enclosed pasture model, and probe adopts elastic model, and the finite element geometrical model adopts the large deformation model;
Second step: as object function, described penetration resistance comprises side friction and end resistance to the first step cone penetration test numerical computations penetration resistance that obtains and the smallest error function of surveying penetration resistance;
The 3rd step: use the nonlinear optimization algorithm second object function that goes on foot is optimized, numerical computations and nonlinear optimization inversion method are combined, make it rapidly converge to globally optimal solution by iterating;
The 4th step: thus the optimal value of the intensity parameter of definite soil undetermined is set up the corresponding relation between actual measurement penetration resistance and the geotechnical body intensity parameter, and described geotechnical body intensity parameter is cohesion and angle of internal friction.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587427A (en) * | 2012-04-05 | 2012-07-18 | 铁道第三勘察设计院集团有限公司 | Analysis method for estimating settlement of pile foundation on basis of penetration technology |
| CN102864766A (en) * | 2012-08-22 | 2013-01-09 | 江苏省电力设计院 | Liquefaction judgment method based on standard penetration and static cone penetration test correlation |
| CN104499473A (en) * | 2014-12-25 | 2015-04-08 | 程培峰 | Method for detecting intensity of highway subgrade |
| CN104963328A (en) * | 2015-06-29 | 2015-10-07 | 中国电建集团成都勘测设计研究院有限公司 | Method for confirming internal friction angle of coarse-grained soil under large embedded depth |
| CN105804042A (en) * | 2016-03-16 | 2016-07-27 | 铁道第三勘察设计院集团有限公司 | Foundation settlement deformation calculating method based on gyration penetration testing technology |
| CN106442937A (en) * | 2016-10-14 | 2017-02-22 | 中交天津港湾工程研究院有限公司 | Novel marine shallow soil feature detection system and evaluation method thereof |
| CN107345883A (en) * | 2017-02-22 | 2017-11-14 | 浙江科技学院（浙江中德科技促进中心） | Ludox reinforces the intensive analysis device and method of a wide range of sand |
| CN108356069A (en) * | 2018-01-30 | 2018-08-03 | 上海岩土工程勘察设计研究院有限公司 | Polluted Soil stir in situ uniformity computational discrimination method |
| CN108380650A (en) * | 2018-01-30 | 2018-08-10 | 上海岩土工程勘察设计研究院有限公司 | The points distributing method that Polluted Soil stir in situ uniformity differentiates |
| CN108398539A (en) * | 2018-01-30 | 2018-08-14 | 上海岩土工程勘察设计研究院有限公司 | Polluted Soil stir in situ uniformity evaluation method |
| CN113216131A (en) * | 2021-04-02 | 2021-08-06 | 东南大学 | On-site calibration method of in-situ test equipment |
| CN113433003A (en) * | 2021-06-15 | 2021-09-24 | 太原理工大学 | Comprehensive determination method for physical and mechanical parameters of soft rock and soil slope |
| CN113832944A (en) * | 2021-09-06 | 2021-12-24 | 东南大学 | Roadbed consolidation degree evaluation method by using single-bridge static sounding test |
| CN116244813A (en) * | 2023-05-11 | 2023-06-09 | 中国铁路设计集团有限公司 | Soil body strength parameter inversion method based on sounding technology |
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| JP2004019110A (en) * | 2002-06-12 | 2004-01-22 | Toa Harbor Works Co Ltd | Strength measuring method of ground at the present position |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587427B (en) * | 2012-04-05 | 2014-09-03 | 铁道第三勘察设计院集团有限公司 | Analysis method for estimating settlement of pile foundation on basis of penetration technology |
| CN102587427A (en) * | 2012-04-05 | 2012-07-18 | 铁道第三勘察设计院集团有限公司 | Analysis method for estimating settlement of pile foundation on basis of penetration technology |
| CN102864766A (en) * | 2012-08-22 | 2013-01-09 | 江苏省电力设计院 | Liquefaction judgment method based on standard penetration and static cone penetration test correlation |
| CN102864766B (en) * | 2012-08-22 | 2014-12-31 | 江苏省电力设计院 | Liquefaction judgment method based on standard penetration and static cone penetration test correlation |
| CN104499473A (en) * | 2014-12-25 | 2015-04-08 | 程培峰 | Method for detecting intensity of highway subgrade |
| CN104963328A (en) * | 2015-06-29 | 2015-10-07 | 中国电建集团成都勘测设计研究院有限公司 | Method for confirming internal friction angle of coarse-grained soil under large embedded depth |
| CN105804042A (en) * | 2016-03-16 | 2016-07-27 | 铁道第三勘察设计院集团有限公司 | Foundation settlement deformation calculating method based on gyration penetration testing technology |
| CN105804042B (en) * | 2016-03-16 | 2017-12-19 | 铁道第三勘察设计院集团有限公司 | Foundation settlement Method for Calculating Deformation based on rotation touch investigating measuring technology |
| CN106442937A (en) * | 2016-10-14 | 2017-02-22 | 中交天津港湾工程研究院有限公司 | Novel marine shallow soil feature detection system and evaluation method thereof |
| CN107345883B (en) * | 2017-02-22 | 2019-10-01 | 浙江科技学院（浙江中德科技促进中心） | Silica solution reinforces the intensive analysis device and method of a wide range of sand |
| CN107345883A (en) * | 2017-02-22 | 2017-11-14 | 浙江科技学院（浙江中德科技促进中心） | Ludox reinforces the intensive analysis device and method of a wide range of sand |
| CN108356069A (en) * | 2018-01-30 | 2018-08-03 | 上海岩土工程勘察设计研究院有限公司 | Polluted Soil stir in situ uniformity computational discrimination method |
| CN108398539A (en) * | 2018-01-30 | 2018-08-14 | 上海岩土工程勘察设计研究院有限公司 | Polluted Soil stir in situ uniformity evaluation method |
| CN108380650A (en) * | 2018-01-30 | 2018-08-10 | 上海岩土工程勘察设计研究院有限公司 | The points distributing method that Polluted Soil stir in situ uniformity differentiates |
| CN108398539B (en) * | 2018-01-30 | 2023-09-22 | 上海勘察设计研究院(集团)有限公司 | Polluted soil in-situ stirring uniformity evaluation method |
| CN113216131A (en) * | 2021-04-02 | 2021-08-06 | 东南大学 | On-site calibration method of in-situ test equipment |
| CN113216131B (en) * | 2021-04-02 | 2022-05-20 | 东南大学 | On-site calibration method of in-situ test equipment |
| CN113433003A (en) * | 2021-06-15 | 2021-09-24 | 太原理工大学 | Comprehensive determination method for physical and mechanical parameters of soft rock and soil slope |
| CN113832944A (en) * | 2021-09-06 | 2021-12-24 | 东南大学 | Roadbed consolidation degree evaluation method by using single-bridge static sounding test |
| CN116244813A (en) * | 2023-05-11 | 2023-06-09 | 中国铁路设计集团有限公司 | Soil body strength parameter inversion method based on sounding technology |
| CN116244813B (en) * | 2023-05-11 | 2023-07-18 | 中国铁路设计集团有限公司 | Soil body strength parameter inversion method based on sounding technology |
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Application publication date: 20110518 |