Welcome

A Seminar on the Basis of the

Construction of Bored Cast-in-Situ Piles

Subham Kundu (CE - 33)Subhankar Karmakar (CE - 34)Supriya Chowdhury (CE - 35)

IMPS College of Engineering and Technology, Malda.

Content: INTRODUCTION TERMINOLOGY PILE CLASSIFICATION GENERAL DESCRIPTION OF WORK WORKMANSHIP PILE COMPRESSION LOAD TEST BY KENTLEDGE SYSTEM EXECUTION OF CONSTRUCTION WORKS AT SITE PICTURES PILE CUT OFF, EXCAVATION AND CLEAN-UP

THE EQUIPMENTS OF PILING VERTICAL PILE LOAD TEST (INITAIL AND ROUTINE) (COMPRESSION TEST OF CONCRETE) CUBE TEST THE SLUMP TEST OF CONCRETE FINENESS MODULUS TEST FOR COARSE AGGREGATE REQUIREMENTS OF DRILLING MUD (BENTONITE) CONCLUTION REFERENCES

Content:

Introduction: Classification based on the function Classification based on material and

composition

Terminology: Bored Cast In-situ Pile Cut-off Level Diameter of Piles Factor of Safety Initial Load Test Initial Test Pile Load Bearing Pile Pile Spacing Routine Test Pile Safe Load Ultimate Load Capacity Working Load Working Pile Negative Skin Friction or Drag down Force

Pile Classification:

Main Functions of Piles – End Bearing (left) and Friction (right)

General Description Of Work:

Location Piling Work Materials Dewatering Back Filling Power and Water Period of Completion

Workmanship: Control of Piling Installation Use of Drilling Mud Cleaning of Borehole Tremie Concreting Defective Pile Recording of Data

Pile Compression Load Test by Kentledge System :

General Frequency Prerequisite Method

KENTLEDGE

Section view of Tension Test Setup using reaction pile and a Hydraulic jack

View of Tension Test Setup system

DIAL GUAGE HYDROLIC PUMP TESTING PILE

Execution of construction works at site :

Preliminary Works Piling Work Steps of Piling

RIG(TRIPOD WITH WINCH)

BAILERCASING

DMC PIPES CHISEL

TREMIE PIPE REINFORCEMENTS

HYDROMETERHOPPER

COVER BLOCKCONCRETE MIXING MECHINETOTAL STATION

Pile Cut Off, Excavation And Clean-up:

Pile Cut off Level Excavation Cleaning of Work Site

PILE CUT OFF

The Equipments Of Piling : Reinforcements (Stirrups & Stiffeners) DMC Pipes Development Length & Lap Length Tremie Pipes Chisel Bailer Casing Hopper Cement & Admixture

REINFORCEMENTSStirrups & Stiffeners

DMC PIPESTREMIE PIPES

HOPPER

CHISELBAILER CASING

Vertical Pile Load Test (Initial & Routine) :

Definition Process

TEST PILE

PILE LOAD TEST

LOAD vs SETTLEMENT GRAPH

Compression Test Of Concrete (Cube Test) :

Aim Equipments Procedure Precaution Information Results Judgments

UNIVERSAL TESTING MACHINE

CONCRETE CUBES CUBE MOULDS

The Slump Test Of Concrete : Aim Equipments Procedure Precaution Information

True Slump Shear Slump Collapse

Results Judgments

SLUMP CONE

MEASUREMENT OF SLUMP SLUMP CLASSIFICATION

Fineness Modulus of Coarse Aggregate :

Aim Equipments Procedure Precaution Information Results Judgments

Sieve

Requirements Of Drilling Mud (Bentonite):

Properties Functions Requirements

BENTONITE

Conclusion: Bored Cast in situ piling is favourable than other piling

processes. Because there is no waste of time and materials so it is economical and can be cast into exact length. It can bear heavier load and transfer it to the ground soil. Also the transportation cost is not high.

It is not necessary to reinforce the pile in normal cases or in places where the pile is completely submerged in the soil. But for more stability and durability of structure we use reinforcement. Over all, Bored cast in situ is preferable for bearing huge amount of load as it can be cast deep inside the ground.

References : MURTHY V.N.S – SOIL MECHANICS AND

FOUNDATION ENGINEERING SHETTY M.S – CONCRETE TECHNOLOGY IS 2911 (Part 1/Sec 2) : 2010

Thank You