CN101705678A - Cone penetration method - Google Patents
Cone penetration method Download PDFInfo
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- CN101705678A CN101705678A CN200910193653A CN200910193653A CN101705678A CN 101705678 A CN101705678 A CN 101705678A CN 200910193653 A CN200910193653 A CN 200910193653A CN 200910193653 A CN200910193653 A CN 200910193653A CN 101705678 A CN101705678 A CN 101705678A
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- cone
- resistance
- cone penetration
- pressure
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a cone penetration method. The method comprises the following steps: (1) measuring the cone tip resistance qci and side wall friction resistance fsi of a probe on the i-th layer of soil by using the probe when a cone penetration feeler lever penetrates the soil layers; and (2) adding a piezometric system at the top of the cone penetration feeler level, using a weighting system to measure the total penetration pressure Pi on the i-th layer of soil when the cone penetration feeler lever penetrates the soil layers. The cone penetration method can be used to obtain the total penetration pressure Pi, the cone tip resistance qci, the side wall friction resistance fsi, the friction-resistance ratio Rf which is equal to fsi/qci, cone pressure ratio Rqi which is equal to qci.A/Pi, side pressure ratio Rsi which is equal to fsi.hi.l/Pi and the like, thus more accurate analyses can be performed in the next step.
Description
Technical field
The present invention relates to the test mode in the geotechnical engineering, relate in particular to a kind of cone penetration method.
Background technology
In the prior art, be applied to the static sounding of rock-soil engineering in-situ test, divide, be divided into single bridge static sounding method and doube bridge static sounding method by reading data.Wherein single bridge static sounding method can only read the specific penetration resistance P of soil layer
s, data are single, and the engineering staff is difficult to carry out more analysis, so fewer and feweri people uses.Doube bridge static sounding method can read the conehead resistance q in the soil layer
sWith sidewall frictional resistance f
s, and calculate frictional ratio R
f=f
s/ q
c, its result can be used for according to the injection curve linear feature, divide soil layer in conjunction with borehole data, intensity, compressibilty, bearing capacity, the vertical ultimate bearing capacity of single pile of estimation soil, pile sinking possibility and judge liquefaction is the more quiet spy method of using at present; But this method can only be used for preresearch estimates, and especially the reading of sidewall frictional resistance fs and actual suffered frictional force differ far away, thereby make the result be inaccurate; And the data that this method draws are very limited, and its utilization is very restricted.
For this reason, need provide a kind of improved cone penetration method.
Summary of the invention
The object of the present invention is to provide a kind of cone penetration method, utilize this method can draw more data, thereby help carrying out more next step analyses more accurately, for example can comparatively accurately estimate stake is pressed into total power that certain degree of depth need apply, the degree of depth that under certain preset pressure, stake can be pressed into, and make things convenient for estimation of soil layer feature etc.
For achieving the above object, the present invention adopts following technical scheme: a kind of cone penetration method, when comprising the steps: that (1) is in static sounding bar injection soil layer, read the static point resistance q of probe at i layer Tu Chu
CiWith sidewall frictional resistance f
Si(2) add the pressure measurement system at the top of static sounding bar, in the time of in static sounding bar injection soil layer, measure total injection pressure P at i layer Tu Chu with described pressure measurement system
i
Beneficial effect of the present invention is: cone penetration method provided by the invention can draw total injection pressure P
i, static point resistance q
Ci, sidewall frictional resistance f
SiWith frictional ratio R
f, awl pressure ratio R
Qi=q
CiA/P
iAnd R is compared in side pressure
Si=f
SiH
iL/P
iDeng, repeatedly measure the average frictional ratio that can draw certain soil layer, average awl pressure ratio and average side pressure are compared etc., thereby can set up the relation between these ratios and the soil layer property (as water content, compressibilty, viscosity and shearing property), and investigation and prospecting is had good reference value; Simultaneously, draw the side frictional resistance power factor a of certain soil layer
SiCan proofread and correct the sidewall frictional resistance that quiet probe is read, draw the sidewall frictional resistance of more approaching reality, thereby can estimate following degree of depth that can be pressed into of certain gross pressure more accurately, and stake will be pressed into certain degree of depth the time, the gross pressure that need apply at the stake top; In addition, can also estimate vertical ultimate bearing capacity of single pile more exactly.
The specific embodiment
To introduce one embodiment of the present of invention below.
A kind of new cone penetration method of this embodiment comprises the steps:
(1) utilizes the doube bridge static sounding probe, in the time of in static sounding bar injection soil layer, measure the static point resistance q of rock-soil layer
CiWith sidewall frictional resistance f
Si
(2) add the pressure measurement system at the top of static sounding bar, in the time of in static sounding feeler lever injection soil layer, measure total injection pressure P at rock-soil layer with the pressure measurement system.
In the present embodiment, this method realizes by a kind of improved static sounding equipment, this improved equipment comprises the fuselage platform, be arranged on the quiet spy device on the fuselage platform and be symmetricly set on the weightening finish device of these quiet spy device both sides, and is arranged on the leg system under the fuselage platform; This quiet spy device comprises the static sounding bar and is positioned at the force application apparatus of static sounding masthead portion to this static sounding bar application of force; between static sounding masthead portion and force application apparatus, add the pressure measurement system; this pressure measurement system comprises a sensor; be used for the power that perception is applied to static sounding masthead portion; protective device is set around sensor, damages to prevent sensor.
Like this, when static sounding, just can read total injection pressure P, static point resistance q simultaneously
c, sidewall frictional resistance f
s, and calculate frictional ratio R
f=f
Si/ q
Ci, awl pressure ratio R
Qi=q
CiA/P
iAnd R is compared in side pressure
Si=f
SiH
iL/P
iDeng.This new quiet spy method has drawn more data than traditional cone penetration method, for after analysis computing etc. more foundation is provided; And repeatedly measure the relation that to set up between above-mentioned each ratio and the soil layer property (as water content, compressibilty, viscosity and the property sheared), investigation and prospecting is had good reference value; It is limited to have solved the survey data that is faced in the civil engineering investigation and prospecting, the problem of estimation result and actual apart from each other.
In addition, can also utilize following formula to try to achieve the side frictional resistance power factor a of i layer soil
Si(ratio of the sidewall frictional resistance that sidewall frictional resistance that promptly calculates and quiet feeler lever probe are measured):
Wherein, h
iBe that i layer soil layer is thick, f
SiBe the i layer soil sidewall frictional resistance reading that quiet feeler lever probe is read, q
CiBe the i layer soil static point resistance reading that quiet feeler lever probe is measured, p
iThe gross pressure reading scaled value of the i layer Tu Chu that measures for the utilization system of weighing, l is the probe girth, A is long-pending for awl point and enlarged footing compound section, β
iBe probe enlarged footing influence coefficient.The meaning of above-mentioned symbology that appears at other places in this manual is the same.
Repeatedly measure the average side frictional resistance power factor a that can draw certain all soil layer of place
SioThereby, can estimate total power that force application apparatus need apply when stake was pressed into certain depth more accurately, and in default following degree of depth that can be pressed into of the power that always applies or the like, the ultimate bearing capacity that can also estimate more accurately in addition or the like.
The above only is embodiments of the invention, can not limit the present invention's interest field with this, and therefore, the equivalent variations according to the present patent application claim is done still belongs to the protection domain that the present invention is contained.
Claims (1)
1. cone penetration method, it comprises the steps:
(1) in the time of in static sounding bar injection soil layer, reads the static point resistance q of probe at i layer Tu Chu
CiWith sidewall frictional resistance f
Si
(2) add the pressure measurement system at the top of static sounding bar, in the time of in static sounding bar injection soil layer, measure total injection pressure P at i layer Tu Chu with described pressure measurement system
i
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910193653A CN101705678A (en) | 2009-11-04 | 2009-11-04 | Cone penetration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910193653A CN101705678A (en) | 2009-11-04 | 2009-11-04 | Cone penetration method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101705678A true CN101705678A (en) | 2010-05-12 |
Family
ID=42375927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910193653A Pending CN101705678A (en) | 2009-11-04 | 2009-11-04 | Cone penetration method |
Country Status (1)
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|---|---|
| CN (1) | CN101705678A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979776A (en) * | 2010-10-26 | 2011-02-23 | 中铁第四勘察设计院集团有限公司 | Method for measuring control dynamic shearing strain in fatigue dynamic tri-axial test |
| CN102561296A (en) * | 2012-04-05 | 2012-07-11 | 铁道第三勘察设计院集团有限公司 | Static cone penetration test method |
| 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 |
| CN103046583A (en) * | 2012-12-31 | 2013-04-17 | 河海大学 | Cone penetration test detection method for cement mixing pile with preset guide pipe |
| CN105155500A (en) * | 2015-08-03 | 2015-12-16 | 河海大学 | Rotation type static sounding detecting method for cement mixing pile |
| CN107022995A (en) * | 2017-05-27 | 2017-08-08 | 中铁第四勘察设计院集团有限公司 | The method that lateral loading test datum-plane bedding value is determined using static sounding specific penetration resistance |
| CN107130577A (en) * | 2017-05-27 | 2017-09-05 | 中铁第四勘察设计院集团有限公司 | The method that Flat Dilatometer Test datum-plane bedding value is determined using static sounding specific penetration resistance |
| CN115014192A (en) * | 2022-05-26 | 2022-09-06 | 重庆电子工程职业学院 | System and method for automatically acquiring, transmitting and processing sounding data |
-
2009
- 2009-11-04 CN CN200910193653A patent/CN101705678A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101979776B (en) * | 2010-10-26 | 2012-08-29 | 中铁第四勘察设计院集团有限公司 | Method for measuring control dynamic shearing strain in fatigue dynamic tri-axial test |
| CN101979776A (en) * | 2010-10-26 | 2011-02-23 | 中铁第四勘察设计院集团有限公司 | Method for measuring control dynamic shearing strain in fatigue dynamic tri-axial test |
| 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 |
| CN102561296A (en) * | 2012-04-05 | 2012-07-11 | 铁道第三勘察设计院集团有限公司 | Static cone penetration test method |
| 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 |
| CN103046583A (en) * | 2012-12-31 | 2013-04-17 | 河海大学 | Cone penetration test detection method for cement mixing pile with preset guide pipe |
| CN103046583B (en) * | 2012-12-31 | 2014-12-10 | 河海大学 | Cone penetration test detection method for cement mixing pile with preset guide pipe |
| CN105155500A (en) * | 2015-08-03 | 2015-12-16 | 河海大学 | Rotation type static sounding detecting method for cement mixing pile |
| CN107022995A (en) * | 2017-05-27 | 2017-08-08 | 中铁第四勘察设计院集团有限公司 | The method that lateral loading test datum-plane bedding value is determined using static sounding specific penetration resistance |
| CN107130577A (en) * | 2017-05-27 | 2017-09-05 | 中铁第四勘察设计院集团有限公司 | The method that Flat Dilatometer Test datum-plane bedding value is determined using static sounding specific penetration resistance |
| CN107022995B (en) * | 2017-05-27 | 2019-04-02 | 中铁第四勘察设计院集团有限公司 | The method for determining lateral loading test datum-plane bedding value using static sounding specific penetration resistance |
| CN107130577B (en) * | 2017-05-27 | 2019-07-16 | 中铁第四勘察设计院集团有限公司 | The method for determining Flat Dilatometer Test datum-plane bedding value using static sounding specific penetration resistance |
| CN115014192A (en) * | 2022-05-26 | 2022-09-06 | 重庆电子工程职业学院 | System and method for automatically acquiring, transmitting and processing sounding data |
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Open date: 20100512 |