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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            <p>
              <s xml:id="echoid-s7716" xml:space="preserve">
                <pb o="53" file="0357" n="378" rhead="LIVRE IV. DES EDIFICES MILITAIRES."/>
              larges, & </s>
              <s xml:id="echoid-s7717" xml:space="preserve">dont le courant eſt rapide, les palées doivent être
                <lb/>
              faites de 2 ou 3 rangs de files de pieux bien coefés, liernés, & </s>
              <s xml:id="echoid-s7718" xml:space="preserve">moiſés,
                <lb/>
              avec des contre-fiches à deux rangs, pour les entretenir comme dans
                <lb/>
              la planche 22.</s>
              <s xml:id="echoid-s7719" xml:space="preserve"/>
            </p>
            <p>
              <s xml:id="echoid-s7720" xml:space="preserve">La plûpart de ces palées ſont pour l’ordinaire contregar dées du cô-
                <lb/>
              té d’amont par un avant-bec de pilotage en forme de briſe-glace, qu’on
                <lb/>
                <note position="right" xlink:label="note-0357-01" xlink:href="note-0357-01a" xml:space="preserve">
                  <emph style="sc">Planch</emph>
                .
                  <lb/>
                22.</note>
              revêtit de planches par dehors, depuis les plus baſſes eaux de la ri-
                <lb/>
              viere, juſqu’aux plus hautes des inondations, afin que lors que le
                <lb/>
              courant charie des glaces & </s>
              <s xml:id="echoid-s7721" xml:space="preserve">des arbres, les uns & </s>
              <s xml:id="echoid-s7722" xml:space="preserve">les autres ayent
                <lb/>
              moins de priſe ſur le corps des palées, & </s>
              <s xml:id="echoid-s7723" xml:space="preserve">qu’ils ne faſſent que
                <lb/>
              gliſſer.</s>
              <s xml:id="echoid-s7724" xml:space="preserve"/>
            </p>
            <p>
              <s xml:id="echoid-s7725" xml:space="preserve">Comme il peut arriver qu’en voulant planter des pieux pour
                <lb/>
              former une palée, l’on rencontre du roc dans le lit de la riviere,
                <lb/>
              poſitivement dans l’endroit où l’on en veut enfoncer; </s>
              <s xml:id="echoid-s7726" xml:space="preserve">ſi l’on
                <lb/>
              n’a pû faire des batardaux & </s>
              <s xml:id="echoid-s7727" xml:space="preserve">les épuiſemens, enſorte qu’il reſte 5
                <lb/>
              ou 6 pieds d’eau, on ſera ſans doute embaraſſé dans un pareil cas,
                <lb/>
              puiſqu’il n’eſt pas poſſible que des hommes tout couverts d’eau,
                <lb/>
              puiſſent faire un trou de 3 ou 4 pieds dans le roc: </s>
              <s xml:id="echoid-s7728" xml:space="preserve">pour ſurmon-
                <lb/>
              ter une pareille difficulté, il faut faire deux tonneaux ouverts par
                <lb/>
              les deux bouts, dont l’un ait 9 pieds de diamétre & </s>
              <s xml:id="echoid-s7729" xml:space="preserve">l’autre 5, & </s>
              <s xml:id="echoid-s7730" xml:space="preserve">que
                <lb/>
              ces deux tonneaux ſoient deux pieds plus hauts que la profondeur
                <lb/>
              de l’eau, l’on placera le plus grand dans la riviere à l’endroit où l’on
                <lb/>
              veut percer, de maniere que le roc ſe trouve dans le milieu du
                <lb/>
              tonneau, enſuite l’on enfoncera les douves de quelques pouces
                <lb/>
              dans le lit de la riviere, & </s>
              <s xml:id="echoid-s7731" xml:space="preserve">l’on chargera le deſſus du tonneau de
                <lb/>
              façon que le courant ne l’ébranle point, après l’on mettra le petit
                <lb/>
              tonneau dans le milieu du grand, & </s>
              <s xml:id="echoid-s7732" xml:space="preserve">l’on remplira de terre glaiſe
                <lb/>
              l’eſpace qui eſt entre deux, que l’on battra avec la demoiſelle,
                <lb/>
              pour qu’elle faſſe un bon maſſif; </s>
              <s xml:id="echoid-s7733" xml:space="preserve">enfin l’on vuidera l’eau qui ſera
                <lb/>
              dans le petit tonneau, & </s>
              <s xml:id="echoid-s7734" xml:space="preserve">l’on y introduira un ouvrier qui fera le trou
                <lb/>
              qu’on s’étoit propoſé.</s>
              <s xml:id="echoid-s7735" xml:space="preserve"/>
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            <p>
              <s xml:id="echoid-s7736" xml:space="preserve">Mais, pour revenir à notre pont de charpente de la Planche
                <lb/>
              21, je crois qu’il eſt inuile de m’étendre ſur l’aſſemblage des pie-
                <lb/>
              ces dont il eſt compoſé: </s>
              <s xml:id="echoid-s7737" xml:space="preserve">je raporterai ſeulement les dimenſions de
                <lb/>
              chacune; </s>
              <s xml:id="echoid-s7738" xml:space="preserve">les plans, profils, & </s>
              <s xml:id="echoid-s7739" xml:space="preserve">élevations, donneront l’intelligence
                <lb/>
              du reſte.</s>
              <s xml:id="echoid-s7740" xml:space="preserve"/>
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            <p>
              <s xml:id="echoid-s7741" xml:space="preserve">Les moiſes ſont de differentes longueurs, & </s>
              <s xml:id="echoid-s7742" xml:space="preserve">de 8 à 9 pouces de
                <lb/>
              groſſeur.</s>
              <s xml:id="echoid-s7743" xml:space="preserve"/>
            </p>
            <p>
              <s xml:id="echoid-s7744" xml:space="preserve">Les chapeaux ſont de 6 toiſes de longueur chacun, & </s>
              <s xml:id="echoid-s7745" xml:space="preserve">de 18 à
                <lb/>
              20 pouces de groſſeur.</s>
              <s xml:id="echoid-s7746" xml:space="preserve"/>
            </p>
            <p>
              <s xml:id="echoid-s7747" xml:space="preserve">Les ſemelles au-deſſus des chapeaux, ont chacune 16 pieds de
                <lb/>
              longueur & </s>
              <s xml:id="echoid-s7748" xml:space="preserve">15 pouces de groſſeur.</s>
              <s xml:id="echoid-s7749" xml:space="preserve"/>
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