Ground Improvement work

(Assessment for ground improvement Works at Carbon Capture and

Storage (CCS) project at ICAD-1, Abu Dhabi

(Main Contractor: Dodsal)

Client: MASDAR & ADNOC

Al Dhafra Pipe Line and Contracting WLL

Project: Ground Improvement works

Client: Dodsal

Rev 0, Dated 27-05-2014 Page 1

Contents

1. General ................................................................................................................................ 2

2. Site Location & Brief ............................................................................................................ 2

3. Scope of Work: .................................................................................................................... 2

3.1. Ground Improvement .......................................................................................................... 2

4. Bill of Quantities .................................................................................................................. 4

5. Soil Investigation Report ..................................................................................................... 6

6. Commercial Payment Terms ............................................................................................... 7

7. Duration of the Project ........................................................................................................ 7

8. Submission Procedure ......................................................................................................... 7

9. Responsibility Matrix for ground improvement: ................................................................. 8

Al Dhafra Pipe Line and Contracting WLL

Project: Ground Improvement works

Client: Dodsal

Rev 0, Dated 27-05-2014 Page 2

1. General

We have prepared an assessment for the Ground Improvement works by using Stone Columns based on

the Enquiries we have received from M/s Dodsal, Abu Dhabi.

Total Area of Ground Improvement 24,700 Sq.m

2. Site Location & Brief

The site is located in ICAD-1, Abu Dhabi.

3. Scope of Work:

3.1. Ground Improvement

Main Contractor requested to submit our offer based on two Options, Option-1 by using stone columns

and Option-2 by dynamic replacement.

Emirates Steel Factory

ESNAD

Ground

Improvement Area

Al Dhafra Pipe Line and Contracting WLL

Project: Ground Improvement works

Client: Dodsal

Rev 0, Dated 27-05-2014 Page 3

The total area is around 24,700 sq.m.

The allowable bearing pressure required is 200Kpa for Plot Area- 130m x 190m

190.0m

130.0m

190.0m

Al Dhafra Pipe Line and Contracting WLL

Project: Ground Improvement works

Client: Dodsal

Rev 0, Dated 27-05-2014 Page 4

4. Bill of Quantities

The bill of Quantities provide for the both Options are as follows:

OPTION-1- By using Stone Columns

Al Dhafra Pipe Line and Contracting WLL

Project: Ground Improvement works

Client: Dodsal

Rev 0, Dated 27-05-2014 Page 5

OPTION-2- By using Dynamic Replacement

Al Dhafra Pipe Line and Contracting WLL

Project: Ground Improvement works

Client: Dodsal

Rev 0, Dated 27-05-2014 Page 6

5. Soil Investigation Report

In this area there are 6 bores holes conducted to a maximum depth of 20m and some trial pits.

As per the soil investigation report, the following is the summary for general information, for detailed

information one has to go through the Soil report.

Al Dhafra Pipe Line and Contracting WLL

Project: Ground Improvement works

Client: Dodsal

Rev 0, Dated 27-05-2014 Page 7

Summary of Borehole Data:

Depth(m)

SP

T V

alu

es

BH-1 BH-2 BH-3 BH-4 BH-5 BH-6

1.0m 12 7 5 18 19 19

2.0m 1 1 4 1 10 2

3.0m 2 2 3 2 4 1

4.0m 2 1 0 20 2 1

5.0m 25 24 29 20 33 29

6.0m 25 30 26 25 32 34

7.0m 38 36 35 33 37 40

8.0m 43 40 50 50 41 42

9.0m 50 50 50 50 50 50

10.0m >50 >50 >50 >50 >50 >50

11.0m

UCS-

0.33Mpa

UCS-

0.25Mpa

UCS-

0.29Mpa

UCS-

0.36Mpa

UCS-

0.33Mpa

UCS-

0.60Mpa

13.0m

UCS-

1.1Mpa

UCS-

0.59Mpa

UCS-

1.11Mpa

UCS-

0.87Mpa

UCS-

1.49Mpa

UCS-

3.26Mpa

14.5m

UCS-

2.36Mpa UCS-1.0Mpa

UCS-

3.15Mpa

UCS-

0.72Mpa

UCS-

3.11Mpa

In general the top strata is Silty Sand with traces of clay upto 9.0m and very dense Silty sand from 9 to

11.0m and Mudstone starts from 11.0m, with UCS varies from 0.25MPa to 3.15MPa.

6. Commercial Payment Terms

1. 5% Advance Payment 2. Performance guarantee 10%, validity until Jan 31st 2019. 3. 10% Rention shall be released after receipt of completion certificate.

7. Duration of the Project

Total duration is 45days for construction of Stone Columns.

8. Submission Procedure

1. Technical Bid- 3 sets

2. Unpriced Commercial Bid- 1 set

3. Priced Commercial Bid- 1 set

Al Dhafra Pipe Line and Contracting WLL

Project: Ground Improvement works

Client: Dodsal

Rev 0, Dated 27-05-2014 Page 8

9. Responsibility Matrix for ground improvement:

A Copy of the same is attached for information.