{"id":691,"date":"2020-07-01T07:10:58","date_gmt":"2020-07-01T07:10:58","guid":{"rendered":"http:\/\/proserveltd.co.uk\/?post_type=solutions&p=691"},"modified":"2021-02-16T14:16:38","modified_gmt":"2021-02-16T14:16:38","slug":"caissons","status":"publish","type":"solutions","link":"https:\/\/proserveltd.co.uk\/solutions\/caissons\/","title":{"rendered":"Caisson Foundations"},"content":{"rendered":"\t\t
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Caissons<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Caissons are often used in marine construction to reduce the amount of work undertaken in the water.\u00a0 These massive blocks can have a wide variation in foundation requirements, from a level tolerance of \u00b15mm to \u00b1500mm after settlement depending on the purpose of the structure and the ability of later construction stages to absorb this tolerance.<\/p>

Stone bedding layers are often used as the foundation. This creates certain challenges when constructed underwater, such as:<\/p>

  • Difficult to level<\/li>
  • Liable to settlement<\/li>
  • Risk of washout and scour<\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Grouted Foundations<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Compared to stone bedding layers, grout bag foundations are well suited to applications where:<\/p>

    • Construction tolerance is tight<\/li>
    • Settlement is undesirable<\/li>
    • There is a risk of stone washout or scour during or after construction<\/li>
    • When accurate stone levelling is not practical<\/li>
    • When working on a rock bed<\/li>
    • In seismic zones<\/li><\/ul>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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      Installation<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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      Foundation grout bags are specifically developed with the designer and contractor for each project\u2019s particular requirements. Our engineers use a range of variables, not limited to:<\/p>

      • Bed tolerance<\/li>
      • Caisson level tolerance<\/li>
      • Initial stability requirements<\/li>
      • Shear transfer<\/li>
      • Uplift limits<\/li>
      • Transport distances<\/li>
      • Working environment<\/li>
      • Installation windows<\/li><\/ul>

        The formwork and grouting pipes are prefixed to the concrete element in the casing yard. The element is then submerged and positioned on jacks, the bags are pump filled from a grouting barge. The formwork controls the grout, filling the void between the element and the bed surface in a carefully designed sequence. We guarantee void filling and full contact with controlled uplift pressures.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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        Advantages<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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        Foundation grout bags provide control during construction by:<\/p>

        • Achieving tight construction tolerances and little settlement<\/li>
        • Absorbing large bed tolerances<\/li>
        • Eliminating the risk of washout<\/li>
        • Initial stability where required,<\/li>
        • Even distribution over the caisson base<\/li>
        • Eliminating requirement for stone layers when working on rock<\/li><\/ul>

          Performance has been demonstrated by 30 years of proven performance on some of the world\u2019s largest marine construction projects.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"featured_media":2954,"parent":0,"template":"","meta":{"_acf_changed":false,"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}}},"solution_categories":[9],"acf":[],"yoast_head":"\nCaisson Foundations - 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