[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-650265-105":59,"doc-detail-650265-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","underpinning-construction-technical-specifications","Underpinning - Construction Technical Specifications","","This technical document outlines the professional specifications and mandatory safety procedures for the underpinning of existing wall footings. It details a systematic, alternating construction sequence designed to maintain structural integrity during excavation and concrete placement. The guidelines mandate the use of 20 MPa concrete for primary structural support, supplemented by a 2-inch layer of non-shrink grout, such as Embeco 636 or In-Pakt, to ensure a secure connection between the foundation and the new support structure. Essential safety protocols, including a 24-hour curing period between consecutive sections and strict excavation management to prevent soil loss, are emphasized. The document serves as an engineering instruction manual, requiring that any deviations from assumed site conditions be immediately reported to the supervising engineer to ensure compliance with structural safety requirements.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/underpinning-construction-technical-specifications/650265/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/underpinning-construction-technical-specifications/650265.png","ImageObject",300,407,{"name":92,"@type":93},"8796093062539","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-24",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What is the recommended sequence for installing the underpinning?","Question",{"text":112,"@type":113},"The document specifies an alternating sequence to ensure structural stability at all times, requiring the completion of section A before commencing sections B.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What materials are required for the gap between the existing foundation and the new concrete?",{"text":117,"@type":113},"A 2-inch layer of non-shrink grout, specifically identified as Embeco 636 or In-Pakt, must be ram-packed to fill the gap after the initial concrete has gained sufficient strength.",{"name":119,"@type":110,"acceptedAnswer":120},"How long must one wait after grouting before beginning excavation on adjacent sections?",{"text":121,"@type":113},"A mandatory period of 24 hours must be allowed after the installation of the grout before the excavation of any adjacent sections can proceed.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},650265,1792823519,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":66,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":133,"file_id":134,"file_url":135,"file_type":136,"file_size":137,"view_count":24,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":8,"language":138,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":139,"faqs":140,"seo_title":141,"seo_description":67,"update_tm":129,"read_time":81},8796093062539,"SECTION 'D'  \nSECTION 'A' SECTION 'B' SECTION 'C' SECTION 'D' SECTION 'A' SECTION 'B'  \n\"D\" DIMENSION REFER TO NOTES  \nFOR CONCRETE AND REINFORCING STRENGTH SEE GENERAL NOTES  \n6\" MIN  \nNATIVE SOIL  \nNOTES  \nUNDERPIN IN AN ALTERNATING SEQUENCE TO ENSURE THE SAFETY OF THE EXISTING STRUCTURE AT ALL TIMES  \nCOMPLETE SECTION \"A\" BEFORE COMMENCING SECTIONS \"B\"  \nEXCAVATE EACH SECTION TO THE NEW EXCAVATION LEVEL, HAND CLEAN UNDER AND AROUND THE EXISTING FOOTINGS AND PLACE 20 MPa CONCRETE TO WITHIN 2\" FROM THE UNDERSIDE OF THE FOOTING  \nRAM-PACK 2\" OF NON-SHRINK GROUT, EMBECO 636 OR IN-PAKT, BETWEEN THE EXISTING FOUNDATION AND THE TOP OF THE UNDERPINNING CONCRETE. ALLOW 24 HOURS FOR THE CONCRETE TO GAIN STRENGTH  \nALLOW 24 HOURS BETWEEN THE INSTALLATION OF THE GROUT PRIOR TO EXCAVATION OF THE ADJACENT SECTIONS  \nUNDERPINNING SHOWN IS FOR ASSUMED EXISTING CONDITIONS. REPORT ANY VARIATIONS TO THE ENGINEER BEFORE PROCEEDING WITH THE WORK  \nPREVENT LOSS OF MATERIAL FROM UNDERNEATH THE EXISTING FOUNDATION AND FLOOR SLABS  \n\"D\" DIMENSION IS TO BE 3'-0\" UNLESS NOTED OTHERWISE ON THE FOUNDATION DRAWINGS  \nUNDERPINNING WALL FOOTING","cbCaih68tNRT6PQP","https://ap.wps.com/l/cbCaih68tNRT6PQP","pdf",79524,"English","## Underpinning Sequence and Safety Procedures\n## Material and Concrete Specifications\n## Excavation and Foundation Protocols","[{\"question\":\"What is the recommended sequence for installing the underpinning?\",\"answer\":\"The document specifies an alternating sequence to ensure structural stability at all times, requiring the completion of section A before commencing sections B.\"},{\"question\":\"What materials are required for the gap between the existing foundation and the new concrete?\",\"answer\":\"A 2-inch layer of non-shrink grout, specifically identified as Embeco 636 or In-Pakt, must be ram-packed to fill the gap after the initial concrete has gained sufficient strength.\"},{\"question\":\"How long must one wait after grouting before beginning excavation on adjacent sections?\",\"answer\":\"A mandatory period of 24 hours must be allowed after the installation of the grout before the excavation of any adjacent sections can proceed.\"}]","Underpinning - Construction Technical Specifications | PDF"]