Assadali Khan

Working as Sr. Geotechnical Engineer for Sheehania sewage pumping station and micro Tunnelling projects

worked as Sr.Geotechnical Expert for Indore Metro projects

Project responsibilities include:

Responsible for technical sub structure design bid evaluation.

Evaluated various technical bids submitted by the bidder and made comparison statements to select lowest bidder.

Contributed to the project seismic risk related to sub structure (MTHL project) took the lead to perform the site specific seismic studies in order to fix the design parameters and to avoid any potential faults beneath the structure.

Gain experience conducting geophysical techniques to find the seismic risk parameters and analysis with response spectra.

Bid Evaluation and review. Geotechnical Design Elements including Piling works.

Preliminary design of offshore piles including end bearing piles with steel liners in marine zone 16km long.

Design of end bearing and skin friction piles in land portion of bridge of 7 km.

Analysis of Seismic site-specific study and response spectra. Analysis of active fault in the proposed alignment.

Riyadh Metro Line 3 runs in the East-West direction. The metro will be mostly elevated along the western part, then underground in the bored and mined tunnel in the central section of the line, and then generally at grade along the eastern part. The length of line is 40.7km and it features 20 stations, in addition to 2 transfer stations with line 1 and line 6.

Shallow foundations were designed for the viaduct piers in the west section between 3 to 5m depth from ground level.
However, pile foundations were adopted where ever weak rock zones encountered. A potential weak zone called wadi (Wadi Hanifa basin) occurred where via duct approaches the central portion. Combines end bearing and skin friction piles were designed. The skin friction capacity was limited to 6 times diameters of pile. where the line converts viaduct to tunnel. The potential risk due to cavities were identified under the all the piers using cavity probing techniques and the cavities filled with the cement grout down to minimum 10m below the foundations.
The design includes temporary works design for deep underground stations design was carried out considering short term and long-term water tables. The complete shoring system design was based on
depth of excavation, type of soil/rock strata down to the bottom of excavation. In general, the stations were encountered with highly fractured limestone rock (Sulay formation -local name). The shoring design mainly consists of secant pile walls in upper soil with tie back rock bolts designed in fractured rock.

The excavations were supported by micro pile retaining walls in upper soil portion and the lower fractured rock with rock bolting system at different levels. The complete design was carried out using PLAXIS2D model to assess the potential horizontal and vertical displacements.

Job Responsibilities

• Preparation and Review of Geotechnical Investigation Scope.
• Design Review and Approval of Geotechnical Factual reports
• Design Review and Approval of Geotechnical Interpretative reports as per Eurocode 7 EN-1997-1 & EN-1997-2.
• Design Review and approval of Geophysical Reports. Including MASW survey, Electrical Tomography, down hole and cross hole testing. Tele viewer logging.
• Review and Approval of Foundation Design Reports. Foundation design for deep underground stations, Bridge foundation for Viaduct as per AASHTO LRFD BRIDGE DESIGN & ACI codes.
• The viaduct foundations are designed to have checked with potential adequate bearing strength, potential settlement under all limit state in accordance with provisions of AASHTO 2012, beside footing are considering the potential for bearing capacity, settlement, overturning, sliding, uplift, overall stability and loss of lateral support.
• Review and Approval of Temporary works reports including Excavation side slopes, Embankment design. The slope stability design was developed using, PLAXIS2D, SLIDE 5.0 software.
• Review and Approval of Hydrogeological reports of Saudi Arabia region exclusively Riyadh area.
• Review and Approval of TBM method statements.
• Review and Approval of Cavity probing reports.
• Review and approval of Pile foundation design and Pile testing. Checking the bearing pressure, settlement, uplift, lateral stability against lateral loads.
• Review and Approval of Cut and Cover design procedure for deep underground stations including Excavation, Dewatering, Micro piles, Excavation support, short creating.

portion and the lower fractured rock with rock bolting system at different
levels. The complete design was carried out using PLAXIS model to
assess the potential horizontal and vertical displacements at various
excavation stages Layer of Shotcrete 10cm thick reinforcement with an
electro welded wire mesh was placed on rock slope surface as a protection
measure A thorough analysis and instrumentations were carried out on
settlement and movement of adjacent buildings due to construction of
stations.
The station base slab was designed adopting a raft with tension piles to
counter act uplift pressure of groundwater during construction stage.

Geotechnical Investigation and Design services for Qatar
Gas Jetty Boil Off Gas Recovery Phase -1 and 2. The
Foundation Design was done by M/s Tolany Wong
Engineers. USA. Therefore my role was further extended to
coordinate, prepare, and review Foundation design for the
compressor foundations, Pipe racks, Substations
foundations, Ring beam tanks.
 Geotechnical Investigation for Qatar Gas Common Lean
LNG loading facilities Berth-6.Offshore site investigation,
design of pile foundations for the berth, equipment
foundations, detection of cavities using geophysical
technics- MASW survey, crosss hole, down hole test
analysis for foundations prior to design.
 Geophysical survey to Assess Risk of underground cavities
along the Proposed Micro tunnel alignment at Education City
-Doha. The scope Consist of conducting geophysical survey
using surface wave seismic methods to map potential
cavities bearing strata and ground conditions over an
approximately 8.6km of a proposed micro tunnel route at
education city.
 Geotechnical Investigation for Parachute Wing Head
quarters for Qatar Armed Forces. The scope Consist of
drilling of 25 Boreholes down to 40m the boreholes were
drilled using ACKER-DII and B-57 Mobile Drilling Rigs.
Excavation of Ten Trial pits down to 2m or bed rock. Field
Test of Electrical Resistivity, Field plate. Laboratory test of
soil, rock and water samples. Geotechnical Factual and
interpretive reports.
EPIC for dredging, land reclamation and break water
construction / design and engineering services for qatra
petroleum at Raslaffan

October1996
As Structural Engineer Designing the large span bottling plants using
StaadPro software for LPG bottling plants. My responsibilities include
design analysis of space frame structures using Staad Pro software.
Preparing shop drawings using auto cad drawings.Inspcting the
fabrication of space frame members as per design.

Areas of Expertise
* Preparation of proposals based on the Ground geological conditions,
Nature of structures and Clients budgetary parameters.
* Preparation of geotechnical investigation method statements as per
geotechnical drawings and scope of works to get the approval from the
consultants.
* Propose suitable excavation support system like shoring using secant
pile walls, Rock bolting, Tie back walls.
* Dewatering design considering field geotechnical reports with respect to
temporary and permanent water levels.
* Propose recommendations for geotechnical investigation scope based
on existing geotechnical logs and tests.
* Liaise with Government agencies and Design Consultants to ensure
successful completion of projects
* Overall planning scheduling and management of geotechnical
investigation and ensuring completion of assignments within time and
budgetary parameters.
* Foundation design with emphasis on the Settlement, Bearing capacity,
Sliding, Overturning checks.
* Through knowledge of using Geotechnical software like gINT, LPile,
Hole base, Roclab, Plaxis, Slide5.0.
* Design and Review Geotechnical Design of Shallow foundations (Strip,
Raft), Deep Foundations (Pile foundation & Pile testing), Earthen
Embankments, stability of slopes, Soil Nailing, Dewatering.
* Through knowledge in preparation of conceptual design for geotechnical
scope for the proposed structures. .
* Through knowledge of Geotechnical and Civil Engineering test standards
like ASTM, BS, AASTHO, ACI and BS 5930, UBC, QCS2010, Eurocode -
7
* Preparation of Geotechnical Interpretative reports based on the
geotechnical investigation reports.
* Through knowledge in Geophysical Surveys relating to oil/gas projects
like Compressors foundations, Substations. Mitigating with site
conditions relating to selection of geophysical methods for the dynamic
foundations.
* Through knowledge on various field geotechnical tests like, Field density,
Plate load tests, Pile testing, CBR, Permeability tests, Electrical
resistivity, Pressure meter tests, and Geophysical tests like MASW,