Soil Nailing Supports Excavation
Excavation for the PPG Headquarters complex in Pittsburgh, Pa. was critical because the site is adjacent to three historically important buildings. Soil nailing, a method of in situ earth...
Monitoring Saves a Site
A comparison is made of two supported excavations that were similarly designed and constructed. Both excavation support systems consisted of a soldier pile and lagging sheeting wall supported...
Helms Pumped Storage Project
The powerhouse at California's Helms Pumped Storage Project is 1,200 ft below the surface of the Sierra Nevada mountains. Linking existing reservoirs, the project provides...
Unique Installation Methods for Large Interceptor in Poor Soil Conditions
The construction of approximately 1. 5 miles of a major sewer interceptor in downtown Boston encountered some unique construction challenges. The entire route required dewatering during...
Flint Tunnel?A Project of Change and Challenge
The talk will deal with construction of a 12' diameter (8. 5' finished) tunnel in the City of Flint, Michigan. This 5-mile long sewer tunnel was constructed through...
Construction of Mt. Baker Ridge Tunnel
Mt. Baker Ridge Tunnel is a large diameter soft ground highway tunnel constructed through sensitive over-consolidated silts and clays. Its large diameter necessitates the construction...
Slashing Tunnel Costs
The second U.S. application of the New Austrian Tunneling Method at Washington D.C.'s Metro system is described. The innovative method has been used overseas, but American...
Pipe Laying Comes Out of the Trenches
Recent developments have shown that trenchless construction offers an effective and economically attractive alternative to conventional excavation. These findings are especially important...
Unearthing Mt. Baker Tunnel
A new tunnel under Mt. Baker in Seattle is part of major improvements to I-90 between Bellevue and Seattle's business district. Feasibility studies began in 1963, but it was...
State of the Art: Rock Tunneling
In the past twenty years, improvements have been made in the quality of geotechnical information on tunnel projects. Even with good exploratory information, it remains difficult to predict...
Hydro Power
The Kerckhoff 2 Hydroelectric Power Projects adds 140 MW to the capacity of the San Francisco area's Pacific Gas & Electric system. No new dam was needed; only a 4-mile...
Flood Control
The Hamilton and Riemer reservoirs were constructed by excavating pits below grade to receive flood overflows from adjacent streams. The two reservoirs are part of a 52 sq. mile (135 km�)...
Current Issues in Rock Dredging
An attractive alternative to the use of explosives for deepening shipping channels is the improvement of the rock cutter suction dredger. But, assessing the capability and design parameters...
Innovations Cut Costs of a Power Plant's Water System
A two-unit (660 MW each) coal-fired power plant in St. Clair, MI, requires 660,000 gallons of water for condenser cooling. A once through cooling system from the St. Clair River (one mile...
Dirt and Steam
Mechanization came late to the construction industry, and it was not until the middle of the nineteenth century that power earth moving machinery began to be used. Steam powered floating...
Cold Regions Earthwork
The purpose of this paper is to outline the state-of-the-practice in cold regions earthwork based on experience gained in the Prudhoe Bay area of Alaska. Material properties of fill used...
Controlling Productivity at a Hazardous Waste Site
The hazards associated with waste disposal sites can make estimating the resources required for a remedial action difficult. During the recent clean-up of a dioxin disposal site, the manpower...
Compression Rings Support Deep Cut
The plans for building the Cuyahoga Valley Interceptor Lift Station in Cleveland, Ohio, called for 126 ft. (38.4 m) by 105 ft. (32 m) construction, some 80 ft. (24.4 m) below grade. Bracing...
Earth-Filled Slurry Walls Provide Economical Seepage Control
Slurry trench cut-off walls are often used for seepage control after structures requiring excavation are completed, but at a construction site on the Tennessee-Tombigbee Waterway project...
Jacked Pipe Provides Roof for Underground Construction in Busy Urban Area
Construction of a major underground station for the metro in Antwerp, Belgium was done in a busy downtown area employing a method that virtually eliminated ground subsidence. The method...
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