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Diaphragm Walls Design Software
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DeepEX Diaphragm Walls Design Software

DeepEX is the ultimate software program for diaphrgm (slurry) wall design. Review how concrete diaphragm walls can be designed with DeepEX software.

The continuous diaphragm wall (also referred to as slurry wall in the US) is a structure formed and cast in a slurry trench (Xanthakos, 1994). The trench excavation is initially supported by either bentonite or polymer based slurries that prevents soil incursions into the excavated trench. The term "diaphragm walls" refers to the final condition when the slurry is replaced by tremied concrete that acts as a structural system either for temporary excavation support or as part of the permanent structure. This construction sequence is illustrated in Figure 1.The term slurry wall is also applied to walls that are used as flow barriers (mainly in waste containment), by providing a low permeability barrier to contaminant transport.

Create, design and optimize any diaphragm wall model in minutes!

Slurry Wall Equipment

Slurry wall technology hinges on specialized equipment for excavating slurry trenches. The simplest type of trenching equipment is the mechanical clamshell attached on a kelly bar. Individual contractors have developed their own specialized trenching equipment like hydraulic clamshells, fraise or hydromills (sample manufacturers: Icos, Bauer, Casagrande, Case Foundation, Rodio etc). Figure 2 shows selected pictures from construction of a new subway in Boston (MBTA South Boston Transit way) including two slurry wall construction machines.

Slurry Wall History
The first diaphragm walls were tested in 1948 and the first full scale slurry wall was built by Icos in Italy in 1950 (Puller, 1996) with bentonite slurry support as a cut-off wall. Icos constructed the first structural slurry wall in the late 1950s for the Milan Metro (Puller, 1996). Slurry walls were introduced in the US in the mid 1960s by European contractors. The first application in the US was in New York City [1962] for a 7m diameter by 24m deep shaft (Tamaro, 1990), that was followed by the Bank of California in San Francisco (Clough and Buchignani, 1980), the CNA building in Chicago (Cunningham and Fernandez, 1972), and the World Trade Center in New York (Kapp, 1969, Saxena, 1974). The majority of diaphragm wall projects in the US are located in six cities Boston, Chicago, Washington DC, San Francisco and New York.

Diaphragm walls are extensively used in the Central Artery/Tunnel project (CA/T) in Boston, Massachusetts (Fig. 3). Work in the CA/T involves many cut and cover tunnels constructed under the existing artery. Some of the deepest T- slurry walls, extending 120' below the surface have been constructed for the Central Artery (Lambrechts et al., 1998).

DeepEX Features
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LIMITATIONS OF SLURRY WALLS
Slurry wall construction requires the use of heavy construction equipment that requires reasonable headroom, site area, and considerable mobilization costs. In limited headroom conditions smaller cranes can be used and the technique can be altered to “remote backfill mixing”, where the excavated soil is transported and mixed to a remote location, and then is returned as backfill.

Cement-bentonite slurry walls also provide another alternative. In this method, the trenches are excavated under a slurry that later solidifies and create the permanent barrier/backfill.

Also, one should check that used bentonite slurry and soil-bentonite slurries are able to withstand chemical attacks from the insitu soils. In such a case, alternate slurry materials such as attapulgite and treated bentonites can be used. Other backfill compositions may be used when deemed appropriate (soil-attapulgite and soil-bentonite with geomembrane inserts). When required, cement-bentonite and soil-cement-bentonite can provide greater strengths.

SLURRY WALL COSTS
Slurry wall construction cost for cut-off barries is considerably cheeper than diaphragm wall construction for deep excavations. The differences arise mainly from construction method differences. In cut-off walls construction is much quicker as a continuous trench is excavated and backfilled and reinforcement cages are seldomly used. In contrast, in diaphragm walls the wall perimeter is constructed panel by panel and reinforcement cages are almost always used.

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DeepEX - Shoring Design Software
DeepEX - Shoring Design Software

DeepEX is the ultimate software program for design and analysis of Deep Excavations! Design any wall type and support system in the most efficient way!

  • Structural and Geotechnical Design
  • Modern Interactive Interface
  • Model Automatic Optimization
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    Finite Element Analysis
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Projects designed with DeepEX

$2 Billion Hudson Yards, New York

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Circular wet soil mix shaft, Florida

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Soldier Pile Wall in Manhattan, NY

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New Version - DeepEX 2022!

The new version DeepEX 2022 is here! New features and new optional modules including design of Sea Walls, wave pressures and overtopping, design of steel connections for struts and walers and more!

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HoloDeepEX

The brand new DeepEX module is now available! Create Holographic representations of 3D deep excavation models and impress your clients!

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DeepEx
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Structural and Geotechnical design of Deep Excavations.

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Web Presentation
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Main Features of DeepEX

DeepEX is the Ultimate software for design of deep excavations. It incorporates general limit equilibrium methods and non-linear analysis method with use of elastoplastic Wincler springs.

DeepEX does both structural and geotechnical analysis of any deep excavation wall and support system.

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Additional Modules of DeepEX

In DeepEX we have implemented additional optional modules that can make your life easier!

The optional modules can be included in the DeepEX Ultimate and can help you get the most out of your software version!

  • Slope Stability and Soil Nailing (always included in DeepEX Ultimate)
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  • Sea Walls - Wave Pressures

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Purchase DeepEX - Customize your version

Order now the best, user-friendly software program trusted by more than 1200 Engineers and Companies worldwide!

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For additional information or to get a special offer, please reach us by:
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DeepEX features and additional modules

DeepEX is the Ultimate software for design of deep excavations. It incorporates general limit equilibrium methods and non-linear analysis method with use of elastoplastic Wincler springs.

DeepEX does both structural and geotechnical analysis of any deep excavation wall and support system.

Additional, optional modules are available and can make your life easier!

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