{"id":5097,"date":"2026-01-27T08:33:10","date_gmt":"2026-01-27T08:33:10","guid":{"rendered":"https:\/\/eurohinca.com\/?p=5097"},"modified":"2026-01-27T08:39:43","modified_gmt":"2026-01-27T08:39:43","slug":"how-to-calculate-the-maximum-admissible-thrust-depending-on-the-pipe-material-and-the-soil","status":"publish","type":"post","link":"https:\/\/eurohinca.com\/en\/como-se-calculan-los-empujes-maximos-admisibles-en-funcion-del-material-de-la-tuberia-y-el-terreno\/","title":{"rendered":"How are the maximum allowable thrusts calculated as a function of pipe material and terrain?"},"content":{"rendered":"
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In a pipe jacking (microtunneling)<\/a><\/strong>, The \u201cmaximum allowable thrust\u201d is obtained by comparing two things:<\/p>

  1. the necessary work thrust<\/strong> (what is \u201crequested\u201d by the terrain and the layout), and<\/p><\/li>

  2. the limit thrust<\/strong> that can safely withstand the pipe + gaskets<\/strong>, the pusher system<\/strong> and the attack shaft<\/strong>.<\/p><\/li><\/ol>

    1) Design thrust (what you need to move forward)<\/h2>

    As a rule of thumb, the design thrust is estimated as:
    Ed \u2248 F_front + F_friction + losses.<\/strong> (curvature, joints, local friction). This is explained in     How to dimension the attack and reception shafts: admissible thrust, hoisting and logistics<\/a><\/strong>.<\/p>