boring test~

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Assignment 1: Assignment 1: BORING TEST Prepared by : Siti Aisyah Binti Ghazali Prepared for : Dr.Haryati Binti Awang SITE INVES TIGA TION (ECG 716) (ECG 716) Aisyah

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Assignment 1:Assignment 1:

BORING TEST

Prepared by :

Siti Aisyah Binti Ghazali

Prepared for :

Dr.Haryati Binti Awang

SITE INVESTIGATION (ECG 716)(ECG 716)

Aisyah

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PRESENTATION OUTLINEPRESENTATION OUTLINE

Site Investigation (ECG 716)

INTRODUCTION

CASE STUDY

OBJECTIVES

PROCEDURE

RESULT & ANALYSIS

USAGE OF PARAMETER

OBTAINED

SIGNIFICANCE AND

APPLICATION

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INTRODUCTIONINTRODUCTION

Site Investigation (ECG 716)

�Boring : soft and uncemented ground which is normally close to the

ground surface.

�Type : Auger boring, wash boring, rotary drilling and percussion drilling

�Focused on : rotary drilling.

�Theoretical : rotary action + force to grind soil or rock= hole. Drilling

requires a combination of a number of element (Heinz, 1989).

GL

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INTRODUCTION (INTRODUCTION (contcont))

Site Investigation (ECG 716)

Drill rod (deliver)

Flush pump

String (transmit)

Hole + take sample

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CASE STUDY

�Proposed Petronas Petrol Station at Gambang, Pahang Darul Makmur.

�Rotary drilling +water (flushing medium ) = exploratory boreholes.

Objective boring test

�To observe the subsoil strata and soil grouping .

�To determine the depth and thickness of the soil composition.

Site Investigation (ECG 716)

BH 1

BH 2

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PROCEDUREPROCEDURE

Site Investigation (ECG 716)

�Drilled is rotated by

applying force.

�The bit is fastened androtated by a drill string,

composed drill pipe to

produce a hole.

�Lifted the cuttings from the hole by:

i. circulated down drilling fluid

continuously inside the drill string

through water courses or nozzlesin the bit.

ii. upward in annular space between

the drill pipe and bore hole.

�Divert the returning

fluid at the surface.

�Lastly, mud is pickedup by the pump

suction and repeat the

cycle.

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PROCEDUREPROCEDURE

Site Investigation (ECG 716)

Hvorslev (1949) suggested a number of general rules which remain applicable:

� founded on clay and other materials : the borings should penetrate the compressible

strata or be extended to such a depth.

� very heavy loads or seepage : stopped boring test when exceptional bearing capacity

and stiffness. If not fulfilled, borings must extended until it has been established that

the strong strata .

�founded on rock : must verified bedrock and not boulders .Eg: extend one or moreborings from 10 to 20 ft into solid rock to determine character of the weathered zone of 

the rock.

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RESULT BOREHOLE: 1

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RESULT BOREHOLE : 2

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� Borehole depth

�Physical properties

i. clayey SILT - BH 1.

ii. clayey and sandy SILT BH 2

�The depth of soil composition

GL

Classification and Depth of Soil for Different

Location of Soil

ANALYSISANALYSIS

Site Investigation (ECG 716)

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Geotechnical parameters obtained useful for :

Represent the soil underneath

� classification of soil as primary information for designing.

help designer understand behavior of the soil.

Do the right decision

� proceed correct calculation for geotechnical design.

� provide information for project engineer, geologist or another technician

involve .

� plan the best method of construction.

Site Investigation (ECG 716)

USAGE OF PARAMETER OBTAINEDUSAGE OF PARAMETER OBTAINED

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The significance/application of the soil parameters :

Foundation

� Supporting base of a structure transmitted to the underlying soil or rock.

Therefore soil should enough to carried the bearing capacity.

Retaining structures

�Supported material to resist pressures.If the soil can¶t resist either the passive or active pressures the structures will be

overturning and sliding therefore damages is resulted.

Site Investigation (ECG 716)

SIGNIFICANCE & APPLICATION USAGE OF THE TEST RESULT IN THESIGNIFICANCE & APPLICATION USAGE OF THE TEST RESULT IN THE

DESIGN OF GEOTECHNICAL STRUCTURE / INFRASTRUCTUREDESIGN OF GEOTECHNICAL STRUCTURE / INFRASTRUCTURE