The irony of this broader entropy equation is perhaps most efficiently expressed in the abstract calculations of embodied energy, or in more entertaining narrative, a previous post by Pruned. Thus tetrapods are rendered simultaneously inadvertent geoengineering. The tetrapod version of localized stabilization generates equal-to, and possibly greater-than counter disturbance in elsewhere landscapes – particularly in the altered voids of the limestone rock quarries from where the raw materials came, the sources of energy for that extraction and manufacturing (coal mining, off shore drilling, transportation logistics, etc.), which in turn leads to more climate change which, which in turn leads to more tetrapods in an accelerating repeating cycle. A bit turgid, but a coastal over-global stabilization? An unintended monument to a corporate ecology of excess?Īs collective infrastructure, tetrapods seem to illustrate a broader meditation on concrete: the most called upon material in landscape, engineering and architecture. However, speculation abounds as to whether all these tetrapods are really necessary, or if they are continually mass produced more out of economic desire rather than functional need. The company manufactures about 18 different tetrapod molds and exports pod designs to vulnerable, low-lying countries around the globe like Maldives, where one can find a monument to Fudo Tetra’s Tetrapods. The Japanese Fudo Tetra Corporation produces the bulk of these tetrapods, owning the patent on the Tetrapod term. The model was tested with irregular wave series, according to the. But here the entropy equation is incomplete because the externalities – the open geographic system behind tetrapod manufacturing – are not factored in. A bidimensional model of a breakwater was built and two tetrapod placement methods were tested, with the same packing density. Similarly, computer modeling illustrates ever more complex diagrams of the dynamics of Tetrapods with fluid forces. Most of the units are numbered and can be observed and tracked by satellite to monitor the efficacy of the overall effort. The inhabitants of Japan have made their nation the site of a sublime corporate geomorphology experiment, as approximately half of the island’s coast line is covered with massive piles of Tetrapods. Hypothetically, most manufactured tetrapods should still be where, or at least near to where they were initially placed. The cognizant Tetrapod discusses its role in combating rising sea levels, and mentions that to date not a single tetrapod has ‘died’ or fallen apart due to erosion or cracking (concrete construction lasts approximately 70 years). 16 – 2- 77) pictured in the photograph above ( “Introduction to the Silence of the Dams“). Sort of like a manifestation of Plato’s dream of an anthropogenic pile of boulders, or very heavy industrial tinker toys macro molecules performing at a mega-fauna gravity scale the glue-like congealing of intricate forces of entropy the design of deceleration.Īs mentioned earlier, Cabinet Magazine has a short interview with one of these hard-working Tetrapods (No. As an image search on Google or Flickr quickly demonstrates, there is a unique aesthetic pleasure in observing how piles of these concrete forms cohere, shift and collectively morph over time. Engineered for coastal breakwater armoring and hard stabilization, tetrapods have proliferated along coastlines over the past 70 years. The analysis follow the methods given in Burcharth (1993) and Burcharth et al. The formula is based on results from small scale model tests with load-cell instrumented Tetrapods in which both the static, the quasi-static and the impact proportions of the loads were recorded. Thus, the formula addresses the observed problem of ensuring structural integrity of the slender types of non-reinforced armour units. This data collection is done in a secondary way by requesting data from related agencies in order to launch this. Two layers of tetrapod units are normmaly placed on the breakwaters with different placement methods. The paper presents a design formula for Tetrapod armour on a 1:1.5 slope exposed to head-on random wave attack The formula predicts the relative number of broken Tetrapods as function of: the mass of the Tetrapods, the concrete tensile strength and the wave height in front of the structure. Kata kunci: breakwater, re design, tetrapod Abstract This study aims to re design the breakwater in the Kartini port of Jepara, which was originally a cube into a tetrapod shape so that the port pool becomes stable again. Tetrapod, one of the well-known artificial concrete units, is frequently used as an armor unit on breakwaters.
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