search.noResults

search.searching

saml.title
dataCollection.invalidEmail
note.createNoteMessage

search.noResults

search.searching

orderForm.title

orderForm.productCode
orderForm.description
orderForm.quantity
orderForm.itemPrice
orderForm.price
orderForm.totalPrice
orderForm.deliveryDetails.billingAddress
orderForm.deliveryDetails.deliveryAddress
orderForm.noItems
PROJECT | TRENCHLESS


UNTANGLED AND OUT


With so many trenchless projects underway across North America, many challenges are faced – and overcome. T&TNA catches up with one such, but unusual, challenge in Toronto


After 15 months, the micro TBM (MTBM) that was tangled in tensioned steel tie-back wires, and so stuck on a section of Toronto’s Basement Flooding Protection Program, was finally retrieved. The MTBM had begun boring in March 2022 to install a 3ft-diameter (900mm) storm sewer. But a few months later, in June, became ensnared in the tie-backs that had been placed during prior construction works as part of brace shoring for two mid-rise developments in the area.


Above: An unexpected meeting below Toronto – MTBM stuck among surprise find of steel tie-backs IMAGES COURTESY OF CITY OF TORONTO 26 | Winter 2023


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57