Controlled Trench Blasting in Frozen Ground

Nuclear Testing of Utility Trench Backfill
For many years, Westchester County municipalities were resigned to the fact that compaction of utility trenches could not be done satisfactorily and that settlement and road failure would...

Design of Marine Pipelines for Areas of Unstable Sediment
Burial of marine pipelines is the preferred method of improving long-term performance. Embedment is achieved with a jet sled that erodes a trench of the desired depth whereby natural processes...

Amplitude Reduction of Surface Waves by Trenches
The effect of trenches and barriers in reducing the disturbances created by a time-harmonic line load acting on the surface of a linearly elastic, layered slab is investigated. In this...

Trench Cave-In: Contractor's Responsibility
The article Can Trench Cave-In Deaths Be Cut— in CIVIL ENGINEERING—ASCE, September 1977, states that the owner's engineer should accept responsibility for the design of temporary...

Survey of Construction Related Trench Cave-Ins
Newspapers, state and Federal agencies, insurance companies, and trenching contractors were contacted to determine causes and occurrences of cave-ins. In the United States alone, approximately...

Can Trench Cave-In Deaths Be Cut—
About 100 construction workers die each year in trench cave-ins. That toll can be cut, two engineer-researchers conclude. Approach would be to make more-adequate geotechnical analysis...

Filter Fabrics: Growing Use in Road and Highway Construction
Filter fabrics are seeing increasing use in road and highway construction; and promise to see greatly expanded use in the near future. A rapidly growing use is in constructing longitudinal...

Experimental Trench in Armored Riverbed in Alaska
A trench through the armor layer of gravel and cobbles in a stream bed underlain with mostly sandy material might be expected to cause subsequent stream bed erosion. To test this, an experiment...

Optimum Size of Equipment
Generally speaking, equipment of greater capacity yields lower unit costs than does equipment of lesser capacity. However, this is not true when the equipment is employed in an operation...

A Fail-Safe Subaqueous Concrete Sewer
Describes the design and installation of a unique, tri-gasketed 87-in. (2210 mm) diameter reinforced concrete sewer force main. The total system is approximately 14,000 ft (4,300 m) long,...

Stability of Trenches Filled with Fluids
This paper traces the historical development of the slurry trench wall. Typical slurry compositions are described and expressions are given for penetration of slurry, blowout gradient,...

Diaphragm Wall Construction Techniques
Diaphragm wall construction is used extensively in Europe and a special plant has been developed for excavating the trench using fluid mud to support the walls. Various types of grab reverse-circulation...

Effect of Backfill on Drain Flow in Layered Soils
Transient flow into drains is studied by obtaining computer solutions of the Richards equation by the Alternating Direction Implicit (ADI) method. The flow towards drains placed in two-layered...

Concrete Pipe Culvert Behavior—Part 1
An 84-in. (2.14-m)-diam., reinforced concrete, dummy pipe culvert, with a 1,000-D load rating, was buried under 136 ft (41.5 m) of highway embankment. Six 40-ft (12.2-m)-long zones were...

Concrete Pipe Culvert Behavior—Part 2
An 84-in. (2.13 m)-diam., reinforced concrete, dummy pipe culvert, with a 1,000-D load rating, was buried under 136 ft (41.5 m) of highway embankment. Six 40-ft (12.2-m)-long zones were...

Camanche Dike-2 Slurry Trench Seepage Cutoff

Stability of Slurry Trench Cuts in Saturated Clay

Seepage from Trenches through Nonhomogeneous Soils
Infiltration from shallow trenches of arbitrary cross-sectional shape and through a layer of nonhomogeneous soil was studied analytically. The soil layer is underlain by a bed of gravel...

Drainage in Soils with Initial Gradient
For the realistic analysis of drainage problems concerning clayey, loamy, and silty clay-loamy soils, the Darcy law will have to be modified to include the initial gradients. Analytical...

 

 

 

 

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