As part of a 108-inch transmission waterline project along Esplanade Boulevard between Imperial Valley Drive and Green Plaza in Houston, Stiver Engineering provided a custom lifting plan for the bottom elbow of the waterline at one of our shaft designs. The fitting had to be lifted and held in place while it was welded to the carrier pipe in the tunnel.

Stiver Engineering provided shoring design services for a 72-inch water line project from Emancipation Avenue to Tuam Street on Clay Street in Houston, Texas. Stiver’s work included secant pile shaft design for the launch and receiving shafts. The shafts are 34 ft ID and 80 ft deep. We also created designs for the breakout structure for the Akkerman TBM.

Stiver Engineering provided key design services for the Northeast Transmission Line (NETL) project in Houston. The NETL will transmit 365 million gallons of water a day from the Northeast Water Purification Plant through a 108-inch steel waterline to approximately 900,000 homes in Harris County. Stiver provided a shoring design using soldier piles, wale sets, and steel plate and timber lagging. We also developed a design for a temporary bulkhead to grout fill the annulus of the waterline pipe inside the casing pipe and a cradle design to support the existing 84-inch diameter waterline.

Photo Credit: LAN

Stiver Engineering provided a shoring design for the launch and receiving tunnel shafts, including portal design implementing soldier piles and the shaft design implementing sheet piling and wale sets. Calculations and a finite element analysis (FEA) were performed for a 108-inch diameter tunnel steel casing pipe. Calculations for grout pressure used to fill voids outside the casing pipe were also provided.

Stiver Engineering provided launch shaft, excavator digger shield and thrust block design services for a 108-inch-diameter water line project along city easements from Milner Road to Aldine Westfield Road in Houston, Texas, near the Intercontinental Park area. Two shoring pits, each more than 30 feet deep, were designed with soldier piles, steel plates and timber lagging. Waler beams were used to support the soldier piles. At the launch pit, a jacking frame was designed at the bottom of the pit to resist the thrust from the excavator boring shield system. The jacking frame consisted of three extra waler sets and diagonal bracings connected to a portal support frame using king beams, a header beam and a footer beam.