Bélidor, Bernard Forest de, La science des ingenieurs dans la conduite des travaux de fortification et d' architecture civile

Table of Notes

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                <pb o="59" file="0239" n="246" rhead="LIVRE III. DE LA CONSTRUCTION DES TRAVAUX."/>
              de ne s’y enfoncer que le moins qu’on pourra, & </s>
              <s xml:id="echoid-s5056" xml:space="preserve">enſuite fonder
                <lb/>
              hardiment & </s>
              <s xml:id="echoid-s5057" xml:space="preserve">ſans autre ſujetion que celle que nous allons décrire.</s>
              <s xml:id="echoid-s5058" xml:space="preserve"/>
            </p>
            <p>
              <s xml:id="echoid-s5059" xml:space="preserve">Ayant tracé les allignemens & </s>
              <s xml:id="echoid-s5060" xml:space="preserve">fait les amas de matériaux neceſ-
                <lb/>
                <note position="right" xlink:label="note-0239-01" xlink:href="note-0239-01a" xml:space="preserve">Fondation
                  <lb/>
                ſur le ſable
                  <lb/>
                boüillant.</note>
              ſaires, on ne découvrira le terrain qu’à meſure qu’on fera la maçon-
                <lb/>
              nerie; </s>
              <s xml:id="echoid-s5061" xml:space="preserve">c’eſt-à-dire que ſi on peut faire par jour 6 toiſes courantes
                <lb/>
              de fondemens, on n’en découvrira pas davantage; </s>
              <s xml:id="echoid-s5062" xml:space="preserve">enſuite l’on aſ-
                <lb/>
              ſeoira avec le plus de diligence qu’il ſera poſſible une premiere aſſiſe
                <lb/>
              de gros libages plats, & </s>
              <s xml:id="echoid-s5063" xml:space="preserve">ſur celle-ci une autre bien arrangée à joints
                <lb/>
              recouverts en bain de bon mortier compoſé de terraſſe ou bien de
                <lb/>
              cendrée de Tournay, ſur cette ſeconde une toiſiéme, ainſi de ſuite
                <lb/>
              avec toute la promptitude poſſible, pour ne pas donner le tems
                <lb/>
              aux ſources d’innonder le travail, comme cela eſt aſſés ordinaire. </s>
              <s xml:id="echoid-s5064" xml:space="preserve">Il
                <lb/>
              arrive quelquefois que l’on voit flotter les premieres aſſiſes, & </s>
              <s xml:id="echoid-s5065" xml:space="preserve">que
                <lb/>
              la Maçonnerie ſemble ne pouvoir prendre conſiſtance; </s>
              <s xml:id="echoid-s5066" xml:space="preserve">mais il ne
                <lb/>
              faut pas s’en allarmer, aller ſon train, & </s>
              <s xml:id="echoid-s5067" xml:space="preserve">continuer toûjours s’il eſt
                <lb/>
              poſſible ſans interruption, & </s>
              <s xml:id="echoid-s5068" xml:space="preserve">quelque tems après la Maçonnerie
                <lb/>
              s’affermira comme ſi elle étoit établie ſur le roc: </s>
              <s xml:id="echoid-s5069" xml:space="preserve">c’eſt pourquoi l’on
                <lb/>
              peut élever le reſte ſans aprehender que l’ouvrage manque par le
                <lb/>
              pied, ni que les fondemens s’enfoncent guéres plus, après avoir
                <lb/>
              reçûs toute leur charge, qu’ils l’étoient au commencement; </s>
              <s xml:id="echoid-s5070" xml:space="preserve">il faut
                <lb/>
              ſeulement prendre garde ſur toute choſe de ne pas creuſer autour,
                <lb/>
              crainte d’y attirer l’eau de quelque ſource qui pourroit dégravoïer
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              la Maçonnerie, & </s>
              <s xml:id="echoid-s5071" xml:space="preserve">cauſer de grands dommages: </s>
              <s xml:id="echoid-s5072" xml:space="preserve">enfin, je dirai pour
                <lb/>
              juſtifier cette maniere de fonder, qu’on ne s’y prend pas autrement
                <lb/>
              à Douay, Lille, & </s>
              <s xml:id="echoid-s5073" xml:space="preserve">Bethune, quand il eſt queſtion de revêtir quel-
                <lb/>
              que ouvrage de Fortification dans un terrain comme celui-ci qui y
                <lb/>
              eſt aſſés ordinaire.</s>
              <s xml:id="echoid-s5074" xml:space="preserve"/>
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            <p>
              <s xml:id="echoid-s5075" xml:space="preserve">A Arras & </s>
              <s xml:id="echoid-s5076" xml:space="preserve">à Bethune il y a encore un terrain tourbeux qu’il
                <lb/>
              eſt neceſſaire de connoître pour pouvoir y fonder hardiment: </s>
              <s xml:id="echoid-s5077" xml:space="preserve">ayant
                <lb/>
              cela de particulier, que dès qu’on veut creuſer un peu avant, il
                <lb/>
              en ſort une quantité d’eau prodigieuſe. </s>
              <s xml:id="echoid-s5078" xml:space="preserve">Après avoir tenté toutes
                <lb/>
              ſortes de voyes, on a trouvé que le plus court & </s>
              <s xml:id="echoid-s5079" xml:space="preserve">le plus ſûr parti
                <lb/>
              étoit d’y fonder hardiment avec de bons matériaux, ne s’enfonçant
                <lb/>
              que le moins qu’il eſt poſſible ſans employer ni grillage, ni pilots,
                <lb/>
              & </s>
              <s xml:id="echoid-s5080" xml:space="preserve">l’ouvrage ſe maintient ferme & </s>
              <s xml:id="echoid-s5081" xml:space="preserve">ſolide ſans courir aucun riſque.</s>
              <s xml:id="echoid-s5082" xml:space="preserve"/>
            </p>
            <p>
              <s xml:id="echoid-s5083" xml:space="preserve">Quand on rencontre de ſemblables terrains que l’on ne connoît
                <lb/>
              point parfaitement, il eſt bon de ne le ſonder qu’à une certaine diſ-
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              tance de l’endroit où on le veut travailler, parce que ſi l’on venoit
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              à creuſer trop avant, & </s>
              <s xml:id="echoid-s5084" xml:space="preserve">qu’il en ſortit une grande quantité d’eau, on
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              n’en ſera pas incommodé. </s>
              <s xml:id="echoid-s5085" xml:space="preserve">C’eſtici où je crois qu’on pourroit ſe ſer-
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              vir mieux que par-tout ailleurs de la Maçonnerie de pierrées dont </s>
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