CN106638723A - Calculating method for horizontal bearing force of bucket foundation - Google Patents
Calculating method for horizontal bearing force of bucket foundation Download PDFInfo
- Publication number
- CN106638723A CN106638723A CN201611142999.9A CN201611142999A CN106638723A CN 106638723 A CN106638723 A CN 106638723A CN 201611142999 A CN201611142999 A CN 201611142999A CN 106638723 A CN106638723 A CN 106638723A
- Authority
- CN
- China
- Prior art keywords
- soil
- barrel base
- bucket foundation
- horizontal bearing
- sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a calculating method for horizontal bearing force of a bucket foundation. For a single pile, the method comprises the steps that a standard penetration instrument is used for measuring the standard penetration hammering number NC of the soil texture environment around the bucket foundation; a soil texture sample around the bucket foundation is picked up, and the effective volume weight gamma of soil is measured; the soil texture sample around the bucket foundation is picked up, the shear test is conducted, and the linear relation of shearing strength and pressure stress of the soil sample is obtained; the cohesive force c and the internal friction angle phi of the soil sample are calculated; size parameters of the bucket foundation are measured and include the diameter L and the in-soil depth D; and the horizontal bearing force HU of the bucket foundation is calculated, and HU=gamma NC<-1.1>cphiLD<0.6>. The calculating method has the beneficial effects that the test and calculation are simple.
Description
Technical field
It is a kind of for ocean platform barrel base horizontal direction bearing capacity the invention belongs to field of ocean engineering
Computational methods.
Background technology
Global ocean area more takes up an area the 71% of ball total surface area, is one and enriches and also do not obtain abundant open treasured
Storehouse, covers countless energy resources.In today of land petroleum resources growing tension, Marine oil and gas resource undoubtedly becomes
The hope of people.China's offshore petroleum resources quite enrich, and only South Sea marine oil and gas reserves tentatively exploration is 23,000,000,000 to 30,000,000,000
Ton, therefore the offshore oil at the South Sea is developed to promoting national economic development to have great significance.
Exploitation to Yu Haiyang new forms of energy is mainly built based on ocean platform.The platform of deep-sea oil gas exploitation is main
One of form be tension leg platform (TLP), barrel base is widely used in such ocean with its economy and the low advantage of difficulty of construction
Platform.
Because marine environment is severe, ocean platform will bear numerous environment such as wind load, seaway load in Practical Project
Load.And the soil is porous in seabed, geological environment is complicated, and barrel base can face the risk for wrecking often.
Barrel base interacts, to meet stablizing for superstructure in the soil property environment of seabed with surrounding soil.It holds
The influence factor of loading capability, removes outside its own structure and size, is also closely related with seabed soil property environment.How to calculate barrel-shaped
The bearing capacity on basis, lacks both at home and abroad at present simple and effective computational methods.Carry to solve barrel base horizontal direction
The numerical computations of power, estimate the bearing capacity of barrel base, make this invention.This statement is for barrel base and surrounding soil property
The interaction of environment, it is proposed that the computing formula of its ultimate lateral bearing capacity, simplifies the meter of barrel base horizontal bearing capacity
Calculation process.
The content of the invention
It is an object of the invention to provide a kind of fast and convenient barrel base horizontal bearing capacity computation method, the method passes through
To impact of the ground soil parameter to barrel base horizontal bearing capacity, Standard piercing blow counts and ultimate bearing capacity of foundation soil are established
Relation.Propose a simple and effective ultimate lateral bearing capacity computing formula.
A kind of computational methods of barrel base horizontal bearing capacity, for single pile, comprise the steps：
Step 1：The Standard piercing blow counts N of residing soil property environment around barrel base is determined using standard penetrometerC；
Step 2：Soil property sample around pickup barrel base, determines the effective unit weight γ of soil；
Step 3：Soil property sample around pickup barrel base, carries out shearing test, obtains the shear stress and compression of soil sample
Linear relationship；And calculate cohesive strength c and internalfrictionangleφ of soil sample；
Step 4：Determine the dimensional parameters of barrel base, including diameter L and embedded depth D；
Step 5：Calculate barrel base horizontal bearing capacity HU=γ NC -1.1cφLD0.6。
The present invention outstanding advantages be：
1st, barrel base horizontal bearing capacity computation formula of the invention is cutting with standard penetration test (SPT) hammer number and soil
Shearing stress is used as parameter, and parameter determination method is simple and reliable.
2nd, computing formula computational accuracy proposed by the present invention disclosure satisfy that engine request, and the computational methods after simplifying are easy to work
Cheng Yingyong.
Specific embodiment
The present invention is described in detail with reference to embodiment.
Embodiment：The present embodiment is specifically related to a kind of simplified calculation method of pile foundation level bearing capacity, and the computational methods are led to
The measure of the shear strength of the Standard piercing blow counts to barrel base surrounding soil and soil is crossed, the meter of horizontal bearing capacity is carried out
Calculate.Embodiment includes a barrel base model.
The simplified calculation method specifically includes following steps：
(1) first the Standard piercing hammer number of soil property environment around barrel base is measured by standard penetration test (SPT), is pressed
According to all around respectively surveying one group, average.Its operating process is, with the hammer of 63.5kg, freely to fall from the height of 76cm, will
Length 51cm, external diameter 5.1cm, internal diameter 3.49cm are driven into 30cm in soil to standard penetrometer, blow counts needed for record.
The Standard piercing blow counts of table 1
There is not a detailed quantizating index to soil material in engineering, typically all simply limit a value model
Enclose.Standard penetration test (SPT) is a kind of from macroscopically, through a kind of short-cut method of numeral performance soil indicator.
(2) effective unit weight of soil sample is determined, effective unit weight value 1950kg/m of soil in embodiment2
(3) shear strength of soil sample is determined, Coulomb's equation is used：
τ=c+ σ tan φ
The shear strength of table 2
Obtain cohesive strength c=2.627kPa of soil in embodiment, the internalfrictionangleφ=25.6o of soil
(4) diameter and embedded depth of barrel-shaped model are determined：Single barrel mould diameter 0.22m, embedded depth in embodiment
0.44m。
Finally calculate the horizontal bearing capacity of single barrel mould
HU=1950*13.75-1.1*6.627*25.12*0.44*0.220.6=3222N
Single barrel mould research experiment during embodiment formula is calculated：Obtaining horizontal bearing capacity finite element numerical is
2950N。
It should be noted that the final calculated value of single barrel mould horizontal bearing capacity is substantially close with finite element modelling value, but
It is its computational methods is simplified, it is to avoid loaded down with trivial details step.
Claims (1)
1. a kind of computational methods of barrel base horizontal bearing capacity, for single pile, comprise the steps：
1) step 1：The Standard piercing blow counts N of residing soil property environment around barrel base is determined using standard penetrometerC。
2) step 2：Soil property sample around pickup barrel base, determines the effective unit weight γ of soil；
3) step 3：Soil property sample around pickup barrel base, carries out shearing test, obtains the shear stress and compression line of soil sample
Sexual intercourse；And calculate cohesive strength c and internalfrictionangleφ of soil sample；
4) step 4：Determine the dimensional parameters of barrel base, including diameter L and embedded depth D；
5) step 5：Calculate barrel base horizontal bearing capacity HU=γ NC -1.1cφLD0.6。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611142999.9A CN106638723A (en) | 2016-12-07 | 2016-12-07 | Calculating method for horizontal bearing force of bucket foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611142999.9A CN106638723A (en) | 2016-12-07 | 2016-12-07 | Calculating method for horizontal bearing force of bucket foundation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106638723A true CN106638723A (en) | 2017-05-10 |
Family
ID=58824499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611142999.9A Pending CN106638723A (en) | 2016-12-07 | 2016-12-07 | Calculating method for horizontal bearing force of bucket foundation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106638723A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241865A (en) * | 2019-05-13 | 2019-09-17 | 上海大学 | A kind of horizontal bearing capacity computation method of skirt-type suction barrel base |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01142125A (en) * | 1987-11-28 | 1989-06-05 | Penta Ocean Constr Co Ltd | Recorder for striking times of pile in pile-driving ship |
| JP2004279285A (en) * | 2003-03-18 | 2004-10-07 | Port & Airport Research Institute | Evaluation method for glogging state of open end pile tip using cone penetration test |
| CN101250866A (en) * | 2007-12-21 | 2008-08-27 | 中国科学院水利部成都山地灾害与环境研究所 | Method for rapidly testing in situ foundation bearing capacity and deformation modulus |
| CN103870692A (en) * | 2014-03-17 | 2014-06-18 | 上海岩土工程勘察设计研究院有限公司 | Pile foundation horizontal carrying force simplified calculation method |
| CN105821911A (en) * | 2015-12-15 | 2016-08-03 | 中国石油天然气集团公司 | Penetrating depth prediction method for self-elevating platform pile leg or pile leg with pile shoe |
-
2016
- 2016-12-07 CN CN201611142999.9A patent/CN106638723A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01142125A (en) * | 1987-11-28 | 1989-06-05 | Penta Ocean Constr Co Ltd | Recorder for striking times of pile in pile-driving ship |
| JP2004279285A (en) * | 2003-03-18 | 2004-10-07 | Port & Airport Research Institute | Evaluation method for glogging state of open end pile tip using cone penetration test |
| CN101250866A (en) * | 2007-12-21 | 2008-08-27 | 中国科学院水利部成都山地灾害与环境研究所 | Method for rapidly testing in situ foundation bearing capacity and deformation modulus |
| CN103870692A (en) * | 2014-03-17 | 2014-06-18 | 上海岩土工程勘察设计研究院有限公司 | Pile foundation horizontal carrying force simplified calculation method |
| CN105821911A (en) * | 2015-12-15 | 2016-08-03 | 中国石油天然气集团公司 | Penetrating depth prediction method for self-elevating platform pile leg or pile leg with pile shoe |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241865A (en) * | 2019-05-13 | 2019-09-17 | 上海大学 | A kind of horizontal bearing capacity computation method of skirt-type suction barrel base |
| CN110241865B (en) * | 2019-05-13 | 2021-05-07 | 上海大学 | Horizontal bearing capacity calculation method of skirt type suction bucket foundation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Centrifuge modeling of lateral bearing behavior of offshore wind turbine with suction bucket foundation in sand | |
| CN114218653B (en) | Offshore construction platform suction pile foundation bearing capacity calculation method | |
| Zhang et al. | Experimental study on installation of hybrid bucket foundations for offshore wind turbines in silty clay | |
| CN101526348B (en) | Measuring method of embedded movement locus of towing anchor in soil body and device thereof | |
| CN108647473A (en) | A kind of shield method builds seabed tunnel Rational Depth computational methods | |
| CN113463699B (en) | Vibroflotation gravel pile confidentiality testing device and intelligent inversion analysis method | |
| Liu et al. | Vertical bearing behaviour of the composite bucket shallow foundation of offshore wind turbines | |
| CN108376188A (en) | The evaluation computational methods of collapsibility of loess | |
| CN106759328B (en) | The optimized calculation method that gravity anchor designs on calcareous ground | |
| Wang et al. | Lateral capacity assessment of offshore wind suction bucket foundation in clay via centrifuge modelling | |
| Liu et al. | Long Yu | |
| Ni et al. | Model tests of buoyant force on underground structures | |
| CN115341589A (en) | Pile foundation bearing characteristic test device considering high stratum stress influence and using method | |
| CN106638723A (en) | Calculating method for horizontal bearing force of bucket foundation | |
| CN101782383B (en) | Method for detecting motion direction of drag anchor in oceansoil | |
| Liu et al. | Laboratory study for pore pressures in a sandy bed under wave loading | |
| CN115452612A (en) | Method for predicting resistance of seabed anti-torque pier | |
| CN106991228B (en) | Method for setting horizontal bearing capacity of gravity anchor | |
| CN115357858A (en) | Method for determining bearing capacity of offshore wind power large-diameter steel pipe pile foundation based on drilling wave velocity | |
| CN104280060A (en) | Method and device for measuring shape of mooring foundation installation mooring rope in seabed soil | |
| CN109308359A (en) | Dimension design method of underwater cable protector | |
| CN112432882B (en) | Offshore underwater high-pressure dilution sludge hole stabilizing angle prediction method | |
| CN105320824A (en) | Method for analyzing injection depth of spud leg of self-elevating drilling platform | |
| Satyam | Review on liquefaction hazard assessment | |
| WU et al. | INFLUENCE OF SEABED SAND LIQUEFACTION ON THE BEARING CAPACITY OF THE SUCTION BUCKET FOUNDATION UNDER EARTHQUAKE LOAD. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170510 |