{"id":5622,"date":"2026-06-05T07:23:15","date_gmt":"2026-06-05T07:23:15","guid":{"rendered":"https:\/\/eurohinca.com\/?p=5622"},"modified":"2026-06-05T07:23:18","modified_gmt":"2026-06-05T07:23:18","slug":"que-faut-il-inclure-dans-un-rapport-geotechnique-pour-choisir-la-technologie-sans-tranchee-appropriee","status":"publish","type":"post","link":"https:\/\/eurohinca.com\/fr\/que-debe-incluir-un-informe-geotecnico-para-seleccionar-la-tecnologia-sin-zanja-adecuada\/","title":{"rendered":"Que doit contenir un rapport g\u00e9otechnique pour s\u00e9lectionner la technologie sans tranch\u00e9e appropri\u00e9e ?"},"content":{"rendered":"

Un rapport g\u00e9otechnique pour la s\u00e9lection d'une technologie sans tranch\u00e9e doit contenir suffisamment d'informations sur le terrain, les eaux souterraines et les risques li\u00e9s \u00e0 la construction de la route. Au minimum, il doit fournir forages, profil g\u00e9ologique, nappe phr\u00e9atique, essais en laboratoire, granulom\u00e9trie, pr\u00e9sence de roches ou de blocs, perm\u00e9abilit\u00e9, agressivit\u00e9 du sol, param\u00e8tres de r\u00e9sistance et variabilit\u00e9 g\u00e9otechnique.<\/strong>.<\/p>\n

Ces informations permettent d'\u00e9valuer si le projet peut \u00eatre mis en \u0153uvre au moyen de le fon\u00e7age de tuyaux<\/a>, forage horizontal directionnel<\/a>, Direct Pipe<\/a> ou un microtunnel \u00e0 bouclier ouvert, un EPB ou un hydrobouclier.<\/p>\n

Informations g\u00e9otechniques minimales recommand\u00e9es<\/h3>\n

Sondages et reconnaissance du terrain :<\/strong> l'emplacement, la profondeur, l'espacement entre les points d'investigation, les carottes, la description stratigraphique et la relation avec l'itin\u00e9raire pr\u00e9vu. Ils doivent couvrir la zone avanc\u00e9e et les zones d'attaque et de r\u00e9ception des puits.<\/p>\n

Profil g\u00e9ologique et hydrog\u00e9ologique :<\/strong> d\u00e9finition des strates, changements de mat\u00e9riaux, zones de transition, remblais, roches, sols mixtes, fractures, cavit\u00e9s, discontinuit\u00e9s, nappes phr\u00e9atiques et pressions d'eau possibles.<\/p>\n

Tests en laboratoire et in situ :<\/strong> granulom\u00e9trie, limites d'Atterberg, humidit\u00e9 naturelle, densit\u00e9, r\u00e9sistance, abrasivit\u00e9, perm\u00e9abilit\u00e9, essais SPT\/CPT le cas \u00e9ch\u00e9ant, compression simple dans la roche et autres param\u00e8tres n\u00e9cessaires pour estimer la stabilit\u00e9 du front de taille, la pouss\u00e9e et l'excavabilit\u00e9.<\/p>\n

Pr\u00e9sence d'eau et perm\u00e9abilit\u00e9 :<\/strong> la nappe phr\u00e9atique mesur\u00e9e, les variations saisonni\u00e8res, la pression de l'eau, la perm\u00e9abilit\u00e9 du sol, le risque d'infiltration, l'entra\u00eenement de particules fines et la n\u00e9cessit\u00e9 de syst\u00e8mes de pompage, de traitement ou de pression.<\/p>\n

Mat\u00e9riaux probl\u00e9matiques :<\/strong> blocs, roches abrasives, sols mixtes, graviers ouverts, sables satur\u00e9s, argiles expansives, remblais anthropog\u00e9niques, sols contamin\u00e9s, cavit\u00e9s ou couches tr\u00e8s h\u00e9t\u00e9rog\u00e8nes.<\/p>\n

Param\u00e8tres pour le choix du tunnelier :<\/strong> la stabilit\u00e9 du front de taille, la granulom\u00e9trie, la coh\u00e9sion, l'angle de frottement, l'abrasivit\u00e9, la r\u00e9sistance de la roche, la pression de l'eau et le comportement du mat\u00e9riau excav\u00e9. Ces donn\u00e9es sont essentielles pour d\u00e9cider entre bouclier ouvert<\/a>, EPB TBM<\/a> o hydro-shield pour les terrains gorg\u00e9s d'eau<\/a>.<\/p>\n

Donn\u00e9es relatives aux puits et aux travaux de g\u00e9nie civil auxiliaires :<\/strong> la profondeur de l'excavation, la stabilit\u00e9 ou le soutien de la pente, les pouss\u00e9es lat\u00e9rales, les infiltrations, le fond de la fosse, la n\u00e9cessit\u00e9 d'une imperm\u00e9abilisation, les traitements du sol et les conditions du sol. puits d'entra\u00eenement vertical et microtunnelier<\/a>.<\/p>\n

L'influence du rapport g\u00e9otechnique sur la solution sans tranch\u00e9e<\/h3>\n

Le rapport g\u00e9otechnique conditionne le choix de la m\u00e9thode, le type de tunnelier, la conception du trou de forage, la pouss\u00e9e attendue, la lubrification, la gestion des boues, les performances attendues, les risques de tassement et le co\u00fbt global du projet.<\/p>\n

Par exemple, les sols stables et \u00e0 faible teneur en eau peuvent permettre la mise en place de boucliers ouverts. Les sols coh\u00e9sifs ou conditionnables peuvent \u00eatre propices \u00e0 l'EPB. Les sols satur\u00e9s, perm\u00e9ables ou soumis \u00e0 une pression d'eau importante peuvent n\u00e9cessiter un blindage hydraulique. Dans le cas de travers\u00e9es longues et complexes ou de trac\u00e9s sp\u00e9ciaux, il peut \u00e9galement \u00eatre n\u00e9cessaire de comparer des solutions alternatives telles que le HDD ou le Direct Pipe.<\/p>\n

Dans les projets concernant les routes, les voies ferr\u00e9es, les voies navigables, les zones urbaines ou les services publics, la qualit\u00e9 du rapport g\u00e9otechnique est essentielle pour r\u00e9duire l'incertitude, d\u00e9finir les contr\u00f4les de surveillance et anticiper les risques pour l'infrastructure travers\u00e9e. Ceci est particuli\u00e8rement important dans les cas suivants Travers\u00e9es d'infrastructures<\/a> o des actions avec des contraintes hydrauliques et environnementales.<\/p>\n

Liste de contr\u00f4le minimale du rapport g\u00e9otechnique :<\/strong> forages, profil stratigraphique, nappe phr\u00e9atique, perm\u00e9abilit\u00e9, granulom\u00e9trie, essais de r\u00e9sistance, abrasivit\u00e9, pr\u00e9sence de blocs ou de roches, variabilit\u00e9 du sol, agressivit\u00e9 chimique, param\u00e8tres de pouss\u00e9e, risques g\u00e9otechniques, \u00e9tat des forages et recommandations en mati\u00e8re de construction.<\/p>\n

C<\/strong>Demander un l'examen technique de la g\u00e9otechnique pour s\u00e9lectionner la technologie sans tranch\u00e9e appropri\u00e9e<\/a> avant de fermer la route ou de lancer l'appel d'offres.<\/p>","protected":false},"excerpt":{"rendered":"

Un informe geot\u00e9cnico para seleccionar una tecnolog\u00eda SIN zanja debe incluir informaci\u00f3n suficiente sobre el terreno, el agua subterr\u00e1nea y los riesgos constructivos del trazado. Como m\u00ednimo, debe aportar sondeos, perfil geol\u00f3gico, nivel fre\u00e1tico, ensayos de laboratorio, granulometr\u00eda, presencia de roca o bolos, permeabilidad, agresividad del terreno, par\u00e1metros resistentes y variabilidad geot\u00e9cnica. Esta informaci\u00f3n permite […]<\/p>\n","protected":false},"author":80,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[146],"tags":[],"class_list":["post-5622","post","type-post","status-publish","format-standard","hentry","category-preguntas-frecuentes"],"yoast_head":"\nInforme geot\u00e9cnico para obras SIN zanja<\/title>\n<meta name=\"description\" content=\"Conozca qu\u00e9 debe incluir un informe geot\u00e9cnico para elegir entre hinca, microt\u00fanel, HDD, Direct Pipe, EPB o hidroescudo.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/eurohinca.com\/fr\/que-faut-il-inclure-dans-un-rapport-geotechnique-pour-choisir-la-technologie-sans-tranchee-appropriee\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" 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