CN110244025A - It is a kind of for obtaining the method and system of peat soil stress history overconsolidation ratio - Google Patents
It is a kind of for obtaining the method and system of peat soil stress history overconsolidation ratio Download PDFInfo
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- CN110244025A CN110244025A CN201910621596.XA CN201910621596A CN110244025A CN 110244025 A CN110244025 A CN 110244025A CN 201910621596 A CN201910621596 A CN 201910621596A CN 110244025 A CN110244025 A CN 110244025A
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- 239000002689 soil Substances 0.000 title claims abstract description 77
- 239000003415 peat Substances 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000007596 consolidation process Methods 0.000 claims abstract description 49
- 239000000523 sample Substances 0.000 claims abstract description 39
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 230000035515 penetration Effects 0.000 claims abstract description 8
- 230000003068 static effect Effects 0.000 claims abstract description 8
- 238000012015 optical character recognition Methods 0.000 claims description 42
- 239000004576 sand Substances 0.000 claims description 7
- 238000012937 correction Methods 0.000 claims description 6
- 238000006467 substitution reaction Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 8
- 238000007689 inspection Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of for obtaining the method and system of peat soil stress history overconsolidation ratio, and more particularly, to Geotechnical Engineering field.The method of the present invention includes: to carry out cone penetration test to the peat soil scene of exploring, and obtains test result, and parse to test result, obtains parsing result；Amendment probe static point resistance q is obtained according to the parsing resultT, obtain peat soil and explore inspection of the scene of a crime data reporting, to amendment probe static point resistance qTOverconsolidation ratio initial value OCR is obtained according to semiempirical semi analytic formula1；According to the overconsolidation ratio initial value OCR1With the exploration report data acquisition peat soil overconsolidation ratio OCR.Applicability and accuracy of the invention is higher, can compare and analyze with indoor consolidation test result, and final accuracy, adaptability and the feasibility for improving peat soil soft foundation design, the present invention can be used as the reference frame of peat soil soft foundation design.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a method and a system for acquiring a historical excess consolidation ratio of peat soil stress.
Background
Peat soil is very special soft soil, has high moisture content, high compressibility, low strength, high thixotropy, high sensitivity etc. and is often the flow plastic state, and its characteristic has decided that it is comparatively difficult to take a sample in the investigation stage of earlier stage, even can take a sample, the disturbance degree is also very big, further causes the unable true basic feature who reflects peat soil itself of indoor test parameter, reduces to a wide margin to the guiding effect of design, construction. Meanwhile, the stress history super-consolidation ratio OCR has great influence on the settlement of the building, and the value size of the stress history super-consolidation ratio OCR has great influence on the design of the soft foundation, the post-processing construction period and the cost.
Disclosure of Invention
The invention provides a method for acquiring a historical excess consolidation ratio of peat soil stress, aiming at the problems, comprising the following steps:
performing a static sounding test on a peat soil exploration field to obtain a test result, and analyzing the test result to obtain an analysis result;
the analysis result comprises: probe cone tip resistance qcSide friction resistance fsAnd the value u of the pressure in the penetration holeT；
Obtaining the resistance q of the tip of the correction probe according to the analysis resultTAcquiring survey report data of a peat soil exploration site, and correcting the cone tip resistance q of the probeTAcquiring initial value OCR of super-consolidation ratio according to semi-empirical and semi-analytical formula1；
According to the initial value of the super consolidation ratio OCR1And acquiring the super consolidation ratio OCR of the peat soil by the survey report data.
Optionally, the resistance q of the tip of the probe is obtained and corrected according to the analysis resultTThe corrected probe cone tip resistance qTThe acquisition formula is as follows:
qT＝qc+(1-α)uT (1)
wherein, α ═ Fα/A，FαThe effective area of the end face of the cone tip and A is the total cross section area of the cone tip (probe).
Optionally, the survey report data comprises: plasticity index of peat soil IpAnd effective dead weight pressure sigma 'of peat soil'v0Effective internal friction angle of peat soilGradient M of critical state curve and shear strength S of peat soil without drainageu。
Optionally, the semi-empirical semi-analytical formula is as follows:
wherein,
optionally, obtaining the OCR, specifically includes:
OCR (optical character recognition) initial value of super consolidation ratio1The substitution of (c) is as follows:
wherein n is coefficient, n is 0.11+0.0037IpAnd m is the power of the power;
obtaining the value of the power m according to the formula (3), and according to the following formula:
and obtaining the super consolidation ratio OCR of the peat soil.
The invention also provides a system for acquiring the historical excess consolidation ratio of the stress of the peat soil, which comprises the following steps:
the analysis module is used for carrying out static sounding test on the peat soil exploration field to obtain a test result, and analyzing the test result to obtain an analysis result;
the analysis result comprises: probe cone tip resistance qcSide friction resistance fsAnd the value u of the pressure in the penetration holeT；
The first calculation module is used for acquiring survey report data of a peat soil exploration field and acquiring corrected probe cone tip resistance q according to the analysis resultTFor the correction of the tip resistance q of the probeTAcquiring initial value OCR of super-consolidation ratio according to semi-empirical and semi-analytical formula1；
Second computing Module, rootAccording to the initial value of the super consolidation ratio OCR1And acquiring the super consolidation ratio OCR of the peat soil by the survey report data.
Optionally, the resistance q of the tip of the probe is obtained and corrected according to the analysis resultTThe corrected probe cone tip resistance qTThe acquisition formula is as follows:
qT＝qc+(1-α)uT
wherein, α ═ Fα/A，FαThe effective area of the end face of the cone tip and A is the total cross section area of the cone tip (probe).
Optionally, the survey report data comprises: plasticity index of peat soil IpAnd effective dead weight pressure sigma 'of peat soil'v0Effective internal friction angle of peat soilGradient M of critical state curve and shear strength S of peat soil without drainageu。
Optionally, the semi-empirical semi-analytical formula is as follows:
wherein,
optionally, obtaining the OCR, specifically includes:
OCR (optical character recognition) initial value of super consolidation ratio1The substitution of (c) is as follows:
wherein n is coefficient, n is 0.11+0.0037IpAnd m is the power of the power;
obtaining the value of the power m according to the formula (3), and according to the following formula:
and obtaining the super consolidation ratio OCR of the peat soil.
The method has high applicability and accuracy, can be compared and analyzed with the indoor consolidation test result, finally improves the accuracy, adaptability and feasibility of the design of the soft peat soil foundation, and can be used as a reference basis for the design of the soft peat soil foundation.
Drawings
FIG. 1 is a flow chart of a method for obtaining a historical consolidation ratio of peat soil stress according to the present invention;
FIG. 2 is a block diagram of a system for obtaining a historical consolidation ratio for peat soil stress according to the present invention;
FIG. 3a is a method q for obtaining the historical consolidation ratio of peat soil stress according to the present inventioncA depth map;
FIG. 3b is a method f for obtaining the historical consolidation ratio of peat soil stress according to the present inventionsA depth map;
FIG. 3c is a method u for obtaining the historical consolidation ratio of peat soil stress according to the present inventionTA depth map.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The invention provides a method for acquiring a historical excess consolidation ratio of peat soil stress, which comprises the following steps of:
performing a static sounding test on a peat soil exploration field to obtain a test result, and analyzing the test result to obtain an analysis result;
the analysis result comprises the following steps: probe cone tip resistance qcSide friction resistance fsAnd the value u of the pressure in the penetration holeT；
Probe cone tip resistance qcSide friction resistance fsAnd the value u of the pressure in the penetration holeTAs shown in fig. 3a, 3b and 3c, respectively;
obtaining the resistance q of the tip of the correction probe according to the analysis resultTCorrecting the resistance q of the probe cone tipTThe acquisition formula is as follows:
qT＝qc+(1-α)uT (1)
wherein, α ═ Fα/A，FαThe effective area of the end face of the cone tip and A is the total cross section area of the cone tip (probe).
Acquiring the survey report data and survey report of the peat soil exploration siteThe advertisement data includes: plasticity index of peat soil IpAnd effective dead weight pressure sigma 'of peat soil'v0Effective internal friction angle of peat soilGradient M of critical state curve and shear strength S of peat soil without drainageu。
Resistance q to the tip of the correction probeTAcquiring initial value OCR of super-consolidation ratio according to semi-empirical and semi-analytical formula1The semi-empirical and semi-analytical formula is as follows:
wherein,
according to the initial value of the super consolidation ratio OCR1And acquiring the super consolidation ratio OCR of the peat soil by the survey report data, wherein the method specifically comprises the following steps:
OCR (optical character recognition) initial value of super consolidation ratio1The substitution of (c) is as follows:
wherein n is coefficient, n is 0.11+0.0037IpAnd m is the power of the power;
obtaining the value of the power m according to the formula (3), and according to the following formula:
and obtaining the super consolidation ratio OCR of the peat soil.
The present invention further provides a system 200 for obtaining a historical consolidation ratio of peat soil stress, as shown in fig. 2, the system 200 comprising:
the analysis module 201 is used for carrying out static sounding test on a peat soil exploration field to obtain a test result, and analyzing the test result to obtain an analysis result;
the analysis result comprises the following steps: probe cone tip resistance qcSide friction resistance fsAnd the value u of the pressure in the penetration holeT；
A first calculation module 202 for obtaining a corrected probe cone tip resistance q according to the analysis resultTCorrecting the resistance q of the probe cone tipTThe acquisition formula is as follows:
qT＝qc+(1-α)uT
wherein, α ═ Fα/A，FαThe effective area of the end face of the cone tip and A is the total cross section area of the cone tip (probe).
Acquiring survey report data of a peat soil exploration site, wherein the survey report data comprises: plasticity index of peat soil IpAnd effective dead weight pressure sigma 'of peat soil'v0Effective internal friction angle of peat soilGradient M of critical state curve and shear strength S of peat soil without drainageu。
Resistance q to the tip of the correction probeTAcquiring initial value OCR of super-consolidation ratio according to semi-empirical and semi-analytical formula1The semi-empirical and semi-analytical formula is as follows:
wherein,
a second calculation module 203 for OCR according to the initial value of the super-consolidation ratio1And acquiring the super consolidation ratio OCR of the peat soil by the survey report data, wherein the method specifically comprises the following steps:
OCR (optical character recognition) initial value of super consolidation ratio1The substitution of (c) is as follows:
wherein n is coefficient, n is 0.11+0.0037IpAnd m is the power of the power;
obtaining the value of the power m according to the formula (3), and according to the following formula:
and obtaining the super consolidation ratio OCR of the peat soil.
The method has high applicability and accuracy, can be compared and analyzed with the indoor consolidation test result, finally improves the accuracy, adaptability and feasibility of the design of the soft peat soil foundation, and can be used as a reference basis for the design of the soft peat soil foundation.
Claims (10)
1. A method for obtaining a historical excess consolidation ratio for peat soil stress, the method comprising:
performing a static sounding test on a peat soil exploration field to obtain a test result, and analyzing the test result to obtain an analysis result;
the analysis result comprises: probe cone tip resistance qcSide friction resistance fsAnd the value u of the pressure in the penetration holeT；
Obtaining the resistance q of the tip of the correction probe according to the analysis resultTAcquiring survey report data of a peat soil exploration site, and correcting the cone tip resistance q of the probeTAcquiring initial value OCR of super-consolidation ratio according to semi-empirical and semi-analytical formula1；
According to the initial value of the super consolidation ratio OCR1And acquiring the super consolidation ratio OCR of the peat soil by the survey report data.
2. The method of claim 1, wherein obtaining the modified probe cone tip resistance q according to the analysis resultTThe corrected probe cone tip resistance qTThe acquisition formula is as follows:
qT＝qc+(1-α)uT (1)
wherein, α ═ Fα/A，FαThe effective area of the end face of the cone tip and A is the total cross section area of the cone tip (probe).
3. The method of claim 1, said survey reporting data comprising: plasticity index of peat soil IpAnd effective dead weight pressure sigma 'of peat soil'v0Effective internal friction angle of peat soilGradient M of critical state curve and shear strength S of peat soil without drainageu。
4. The method of claim 1, wherein the semi-empirical semi-analytical formula is as follows:
wherein,
5. the method according to claim 1, wherein the obtaining of the peat soil super consolidation ratio (OCR) specifically comprises:
OCR (optical character recognition) initial value of super consolidation ratio1The substitution of (c) is as follows:
wherein n is coefficient, n is 0.11+0.0037IpAnd m is the power of the power;
obtaining the value of the power m according to the formula (3), and according to the following formula:
and obtaining the super consolidation ratio OCR of the peat soil.
6. A system for obtaining a historical excess consolidation ratio for peat soil stress, the system comprising:
the analysis module is used for carrying out static sounding test on the peat soil exploration field to obtain a test result, and analyzing the test result to obtain an analysis result;
the analysis result comprises: probe cone tip resistance qcSide friction resistance fsAnd the value u of the pressure in the penetration holeT；
The first calculation module acquires the resistance q of the tip of the probe according to the analysis resultTAcquiring survey report data of a peat soil exploration site, and correcting the cone tip resistance q of the probeTAcquiring initial value OCR of super-consolidation ratio according to semi-empirical and semi-analytical formula1；
A second calculation module for OCR according to the initial value of the hypercuring ratio1And acquiring the super consolidation ratio OCR of the peat soil by the survey report data.
7. The system of claim 6, wherein the data is obtained according to the analysis resultCorrecting probe cone tip resistance qTThe corrected probe cone tip resistance qTThe acquisition formula is as follows:
qT＝qc+(1-α)uT
wherein, α ═ Fα/A，FαThe effective area of the end face of the cone tip and A is the total cross section area of the cone tip (probe).
8. The system of claim 6, said survey report data comprising: plasticity index of peat soil IpAnd effective dead weight pressure sigma 'of peat soil'v0Effective internal friction angle of peat soilGradient M of critical state curve and shear strength S of peat soil without drainageu。
9. The system of claim 6, wherein said semi-empirical semi-analytical formula is as follows:
wherein,
10. the system according to claim 6, wherein the obtaining of the peat soil super consolidation ratio (OCR) specifically comprises:
OCR (optical character recognition) initial value of super consolidation ratio1The substitution of (c) is as follows:
wherein n is coefficient, n is 0.11+0.0037IpAnd m is the power of the power;
obtaining the value of the power m according to the formula (3), and according to the following formula:
and obtaining the super consolidation ratio OCR of the peat soil.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116663457A (en) * | 2023-07-25 | 2023-08-29 | 山东大学 | Conical drag parachute drag resistance prediction method and system based on half-analytic equation |
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Cited By (2)
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| CN116663457A (en) * | 2023-07-25 | 2023-08-29 | 山东大学 | Conical drag parachute drag resistance prediction method and system based on half-analytic equation |
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