HAL Group Inc. was retained by HDR to carry out structural investigations at the Toronto Transit Commission's Queen's Park Station, supporting the station's structural rehabilitation design.

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LIMITED CONDITION SURVEY

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In 2019, HAL carried out a limited condition survey of the station's southwest expansion joint and the east passage overhead beam.

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GPR SCANNING

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In 2020, ground-penetrating radar was used to map the reinforcement in the east passage overhead beam ahead of intrusive work.

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TEST PIT EXCAVATION

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In 2021, HAL located the overhead beam from street level with a Hilti PX 10 Transpointer and opened a test pit by hydrovac so the beam's waterproofing membrane could be exposed and assessed.

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TRAFFIC AND SITE MANAGEMENT

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The night-time work included utility locates, a traffic control plan to OTM Book 7, a paid duty officer, and backfill and surface reinstatement once the assessment was complete.