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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              <s xml:id="echoid-s7790" xml:space="preserve">
                <pb o="55" file="0361" n="383" rhead="LIVRE IV. DES EDIFICES MILITAIRES."/>
              preſentée à jour, pour montrer l’aſſemblage de la charpente, & </s>
              <s xml:id="echoid-s7791" xml:space="preserve">
                <lb/>
              l’autre eſt recouverte de madriers; </s>
              <s xml:id="echoid-s7792" xml:space="preserve">l’on obſervera que la jonction
                <lb/>
              des deux moitiés ſe fait en portion de cercle à l’endroit AA, afin
                <lb/>
              qu’étant arrêtée par des verroux, l’union en ſoit plus ferme: </s>
              <s xml:id="echoid-s7793" xml:space="preserve">à l’é-
                <lb/>
              gard de l’élevation elle n’a rien de particulier, ſinon que les gar-
                <lb/>
              des-foux ſont de fer, pour que le pont en paroiſſe plus leger.</s>
              <s xml:id="echoid-s7794" xml:space="preserve"/>
            </p>
            <p>
              <s xml:id="echoid-s7795" xml:space="preserve">L’autre deſſein repreſente encore un pont tournant, dont la jonc-
                <lb/>
              tion ſe ſait obliquement à l’endroit D: </s>
              <s xml:id="echoid-s7796" xml:space="preserve">le plan eſt à peu près de
                <lb/>
              même que le précédent, il n’y a de difference que dans l’élevation,
                <lb/>
              où les gardes-foux, au lieu d’être de fer ſont de bois, d’un aſſembla-
                <lb/>
              ge particulier qu’il ſuffit d’examiner pour voir que l’on a eu en
                <lb/>
              vûë de rendre ce pont beaucoup plus ſolide que l’autre; </s>
              <s xml:id="echoid-s7797" xml:space="preserve">& </s>
              <s xml:id="echoid-s7798" xml:space="preserve">com-
                <lb/>
              me une pareille conſtruction chargeroit beaucoup la crapaudine, on
                <lb/>
              a crû que pour la ſoulager il falloit faire des roulettes à l’entour,
                <lb/>
              afin de faire tourner le pont aiſément, & </s>
              <s xml:id="echoid-s7799" xml:space="preserve">qu’il demeure toûjours
                <lb/>
              en équilibre, ſans pancher plus d’un côté que de l’autre: </s>
              <s xml:id="echoid-s7800" xml:space="preserve">à l’égard
                <lb/>
              des dimenſions du pont de la 22. </s>
              <s xml:id="echoid-s7801" xml:space="preserve">Planche, je n’en parlerai pas,
                <lb/>
              parce qu’il ſera aiſé de les déterminer, ſur ce que je viens de dire
                <lb/>
              au ſujet de l’autrc.</s>
              <s xml:id="echoid-s7802" xml:space="preserve"/>
            </p>
            <p>
              <s xml:id="echoid-s7803" xml:space="preserve">Comme tout ce qui peut faciliter la communication des ou-
                <lb/>
              vrages apartient à ce chapitre, je crois devoir ajoûter, que quand
                <lb/>
              les foſſés d’une place ſont inondés, on fait des petits ponts à fleur
                <lb/>
              d’eau, qui vont des poternes du corps de la place à la demi-Lune,
                <lb/>
              ou à quelqu’autre ouvrage: </s>
              <s xml:id="echoid-s7804" xml:space="preserve">on en fait auſſi de ſemblables le long
                <lb/>
              des gorges, pour aller de la demi-Lune dans le chemin couvert,
                <lb/>
              ou dans les contregardes, ainſi qu’on le peut voir dans la 25 Plan-
                <lb/>
                <note position="right" xlink:label="note-0361-01" xlink:href="note-0361-01a" xml:space="preserve">
                  <emph style="sc">Planch</emph>
                .
                  <lb/>
                25.</note>
              che: </s>
              <s xml:id="echoid-s7805" xml:space="preserve">l’on pratique pourtant quelquefois des poternes dans les fa-
                <lb/>
              ces, & </s>
              <s xml:id="echoid-s7806" xml:space="preserve">en ce cas le pont, qui communique aux autres ouvrages
                <lb/>
              voiſins, répond à la poterne, & </s>
              <s xml:id="echoid-s7807" xml:space="preserve">n’eſt plus à la gorge de la demi-
                <lb/>
              Lune; </s>
              <s xml:id="echoid-s7808" xml:space="preserve">c’eſt ainſi par exemple qu’au Neuf Briſack l’on communi-
                <lb/>
              que des contregardes dans les tenailles, en paſſant par les poter-
                <lb/>
              nes qui ſont aux flancs.</s>
              <s xml:id="echoid-s7809" xml:space="preserve"/>
            </p>
            <p>
              <s xml:id="echoid-s7810" xml:space="preserve">Quand les foſſés ſont à ſec, on fait des Caponieres qui aſſeurent
                <lb/>
              & </s>
              <s xml:id="echoid-s7811" xml:space="preserve">couvrent parfaitement les communications: </s>
              <s xml:id="echoid-s7812" xml:space="preserve">ces caponieres ne
                <lb/>
              ſont autre choſe qu’un parapet fait en glacis à droit & </s>
              <s xml:id="echoid-s7813" xml:space="preserve">à gauche
                <lb/>
              du paſſage que l’on pratique dans le fond des foſſez, comme on
                <lb/>
              le peut voir ſur la Planche que je viens de citer.</s>
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