K. Perumal

Experienced Diaphragm Wall and Bored Piling Supervisor with over 17 years in managing deep foundation works in Singapore, including D-wall construction, bored piles, guide walls, slurry management, reinforcement cage installation, tremie concreting, and QA/QC procedures. Skilled in site supervision, safety compliance, subcontractor coordination, and ensuring works meet LTA standards. Strong ability to lead multi-disciplinary teams in high-risk and fast-paced environments.

Diaphragm Wall Site Supervisor - ZAP Foundation Pte Ltd

(2021-02)

Tavi Stock Tunnel & Stations CR115

• Supervised diaphragm wall panel excavation using hydraulic grab/cutter rigs (Bauer).
• Coordinated installation of guide walls, slurry circulation system, and tremie concreting works.
• Monitored verticality, depth, and slurry properties (density, viscosity, sand content, pH).
• Supervised rebar cage lifting, and lowering with crawler cranes.
• Conducted toolbox meetings and enforced site safety in compliance with LTA requirements.
• Coordinated with surveyors for wall alignment and with QA/QC for testing and inspection.
• Managed subcontractor activities, equipment mobilization, and work sequencing to avoid delays.
• Reported daily progress, site issues, and preventive actions to project engineers.

Bored Piling Site Coordinator - ZAP Piling Pte Ltd

(2015-01 - 2021-02)

J105 project 2020, National Cancer Centre Outram Park Project 2017

• Coordinate daily piling activities (D-wall, bored pile, secant/tangent piles) with site engineers, supervisors, and subcontractors.
• Ensure piling works follow approved method statements, drawings, and specifications.
• Plan and sequence work to optimize productivity and minimize downtime.
• Monitor piling rig operations, casing installation, slurry management, rebar cage lowering, and tremie concreting.
• Verify pile depth, diameter, verticality, and socketing requirements are achieved.
• Check bentonite/polymer slurry properties (density, viscosity, sand content, pH) before, during, and after excavation.
• Ensure reinforcement cages are fabricated, spliced, and installed correctly.
• Supervise concrete pouring via tremie to prevent segregation and ensure pile integrity.
• Assist in pile integrity testing (PIT, CSL, sonic logging, cross-hole).
• Liaise with consultants, main contractors, and subcontractors for work progress and inspections.
• Coordinate with surveyors for setting out and as-built pile records.
• Ensure timely delivery of concrete, slurry, rebar cages, and other piling materials.
• Coordinate piling sequence and machinery arrangements with site team.
• Report daily site progress, issues, and solutions to the Project Manager.

Piling Site Supervisor - ZAP Piling Pte Ltd

(2008-06 - 2015-01)

Nanyang Polytechnic Project AMK 2013, Jurong Island Exon Mobile SPT Project 2010

• Supervised bored pile drilling operations with casing, auger, and rotary rigs.
• Ensured compliance with pile schedule, depth, verticality, and socketing into rock.
• Checked slurry quality before and after excavation.
• Oversaw reinforcement cage lowering and tremie concreting process.
• Assisted in integrity testing (PIT, CSL, sonic logging).
• Coordinated with batching plant for timely concrete supply.
• Rebar cages inspection with RTO/QPS.
• sheet piles) using hydraulic hammers, vibratory hammers, or drop hammers.
• Ensure pile positions, orientation, and levels are set out correctly before driving.
• Monitor driving process to achieve required penetration, set, and capacity.
• Oversee installation of sheet piles for excavation support, cofferdams, and retaining structures.
• Supervise pile driving operations (precast concrete piles, H-piles, steel tubular piles,
• Supervise pile splicing, welding, and cutting to maintain quality and alignment, etc.

Site Supervisor - JDC Corporation (S)

(2004-03 - 2008-06)

Tuas Ave 14 REC project 2008, Tuas Ave 11 Abbot Project 2007,Tuas Ave 9 Lonza Project 2005

• Supervise structural works such as formwork, rebar installation, concrete pouring, slab/beam/column/wall construction.
• Ensure works comply with structural drawings, method statements, and specifications.
• Monitor sequence of construction (foundation, columns, beams, slabs, shear walls, core walls).
• Oversee concrete placement, vibration/compaction, curing, and finishing.
• Supervise scaffolding, shoring, and falsework erection/dismantling.
• Inspect formwork alignment, levels, and stability before concreting.
• Check reinforcement installation (spacing, cover, lap lengths, anchorage).
• Ensure approved materials (cement, rebar, admixtures) are used.
• Monitor concrete testing (slump test, cube test, core test).
• Record as-built dimensions and highlight deviations.
• Enforce compliance with Workplace Safety & Health (WSH) regulations.
• Ensure proper use of PPE, fall protection, and scaffolding safety.
• Conduct toolbox meetings to highlight hazards (formwork collapse, rebar impalement, crane lifting, hot works).
• Monitor safe lifting/handling of reinforcement and formwork panels.
• Coordinate with Safety Officer on Permit-to-Work (PTW) requirements.
• Liaise with site engineers, surveyors, subcontractors, and consultants for inspections and approvals.
• Coordinate concrete delivery with batching plants to avoid delays and cold joints.
• Communicate daily work plans and allocate tasks to foremen/workers.
• Work with M&E coordinators to ensure embedment and sleeves are placed before concreting.
• Address site issues such as:
• Honeycombing or segregation in concrete
• Reinforcement congestion and fixing difficulties
• Deviation in structural levels or alignment
• Recommend corrective actions and coordinate rectification works.

Higher Secondary (1999 - 1999)