Device for Tube Extraction

A ring with a conical hole is placed over a tube to be extracted. Wedges are inserted between the ring and the tube. As the ring is lifted with hydraulic cylinders, the wedges grip and extract the tube. This kind of device is used, for example, in civil engineering for extracting stop tubes during the construction of diaphragm walls.


  • [Snapshot]
  • [Snapshot]
  • [Snapshot]


Diaphragm walls are usually constructed in the ground for foundation forms or for bordering working pits. First, a narrow trench (usually 60 to 100 cm wide and 10 to 30 m deep) is excavated. Then concrete is poured into the trench to form the diaphragm wall. A stop tube is lowered into the trench to limit the length of the trench for each pour. This makes a panel of diaphragm wall 2-4 m long. The stop tube is removed after the concrete has set. An extracting device, working with hydraulic cylinders, is used to separate the tube from the solid concrete, then the tube is removed from the trench with a crane.


    • Share:

Embed Interactive Demonstration New!

Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site. More details »

Files require Wolfram CDF Player or Mathematica.

Mathematica »
The #1 tool for creating Demonstrations
and anything technical.
Wolfram|Alpha »
Explore anything with the first
computational knowledge engine.
MathWorld »
The web's most extensive
mathematics resource.
Course Assistant Apps »
An app for every course—
right in the palm of your hand.
Wolfram Blog »
Read our views on math,
science, and technology.
Computable Document Format »
The format that makes Demonstrations
(and any information) easy to share and
interact with.
STEM Initiative »
Programs & resources for
educators, schools & students.
Computerbasedmath.org »
Join the initiative for modernizing
math education.
Step-by-Step Solutions »
Walk through homework problems one step at a time, with hints to help along the way.
Wolfram Problem Generator »
Unlimited random practice problems and answers with built-in step-by-step solutions. Practice online or make a printable study sheet.
Wolfram Language »
Knowledge-based programming for everyone.
Powered by Wolfram Mathematica © 2018 Wolfram Demonstrations Project & Contributors  |  Terms of Use  |  Privacy Policy  |  RSS Give us your feedback
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to Mathematica Player 7EX
I already have Mathematica Player or Mathematica 7+