{"id":815,"date":"2015-12-04T17:18:40","date_gmt":"2015-12-04T16:18:40","guid":{"rendered":"https:\/\/www.geomarcsrl.it\/en\/penetrometro-dinamico-spt\/"},"modified":"2021-10-21T12:16:06","modified_gmt":"2021-10-21T10:16:06","slug":"standard-penetration-test","status":"publish","type":"page","link":"https:\/\/www.geomarcsrl.it\/en\/standard-penetration-test\/","title":{"rendered":"Standard penetration test"},"content":{"rendered":"\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_section-1fdd9b6269b9cdd1cf38ecb3996f05ca\">\n.avia-section.av-av_section-1fdd9b6269b9cdd1cf38ecb3996f05ca .av-section-color-overlay{\nopacity:1;\nbackground-color:#58585a;\nbackground-image:url(https:\/\/www.geomarcsrl.it\/wp-content\/themes\/enfold\/images\/background-images\/wool-diagonal-for-dark-background.png);\nbackground-repeat:repeat;\n}\n<\/style>\n<div id='av_section_1'  class='avia-section av-av_section-1fdd9b6269b9cdd1cf38ecb3996f05ca main_color avia-section-default avia-no-shadow  avia-builder-el-0  el_before_av_two_third  avia-builder-el-first  avia-bg-style-scroll av-section-color-overlay-active container_wrap sidebar_right'  ><div class=\"av-section-color-overlay-wrap\"><div class=\"av-section-color-overlay\"><\/div><div class='container av-section-cont-open' ><main  role=\"main\" itemprop=\"mainContentOfPage\"  class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-815'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_heading-4c31804d5c4030762f2e3ae38b220680\">\n#top .av-special-heading.av-av_heading-4c31804d5c4030762f2e3ae38b220680{\npadding-bottom:10px;\ncolor:#ffffff;\n}\nbody .av-special-heading.av-av_heading-4c31804d5c4030762f2e3ae38b220680 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-av_heading-4c31804d5c4030762f2e3ae38b220680 .special-heading-inner-border{\nborder-color:#ffffff;\n}\n.av-special-heading.av-av_heading-4c31804d5c4030762f2e3ae38b220680 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-av_heading-4c31804d5c4030762f2e3ae38b220680 av-special-heading-h1 custom-color-heading blockquote modern-quote  avia-builder-el-1  avia-builder-el-no-sibling  av-thin-font'><h1 class='av-special-heading-tag '  itemprop=\"headline\"  ><strong>Standard penetration test<\/strong><\/h1><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div>\n<\/div><\/div><\/main><!-- close content main element --><\/div><\/div><\/div><div id='after_section_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-815'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_two_third-3329c407e2491d567acfbc2fb6917b55\">\n.flex_column.av-av_two_third-3329c407e2491d567acfbc2fb6917b55{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-av_two_third-3329c407e2491d567acfbc2fb6917b55 av_two_third  avia-builder-el-2  el_after_av_section  el_before_av_one_third  avia-builder-el-first  first flex_column_div  '     ><p><section  class='av_textblock_section av-av_textblock-0366cc7376be6c9e82a3e9cc8987b64f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\" ><div class='avia_textblock'  itemprop=\"text\" ><p>The drop hammer has simple running, the whole set after hoisting is screwed to rods.\u00a0After removing safety pin, the outer tube can be raised together with the hammer. At 2 ft 6 in height, the cam makes release of hinged hooks so that the hammer may automatically fall on the drive-head. The lifting mechanism is then lowered, the hooks re-engaged on the hammer and the procedure can be repeated as by need.<\/p>\n<blockquote>\n<p>This procedure developed by Terzaghi and Peck gives the measurement of the penetration resistance of soil, with the use of a standard sampler driven for 1 ft with a hammer of 140 lb, dropping 30 in.<\/p>\n<\/blockquote>\n<\/div><\/section><br \/>\n<div  class='avia-button-wrap avia-button-center  avia-builder-el-4  el_after_av_textblock  avia-builder-el-last '>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kv0sh37r-7170e3eee8a9e67cf565cfe4ca5daf12\">\n#top #wrap_all .avia-button.av-kv0sh37r-7170e3eee8a9e67cf565cfe4ca5daf12:hover{\nbackground-color:#444444;\ncolor:white;\ntransition:all 0.4s ease-in-out;\n}\n#top #wrap_all .avia-button.av-kv0sh37r-7170e3eee8a9e67cf565cfe4ca5daf12:hover .avia-svg-icon svg:first-child{\nfill:white;\nstroke:white;\n}\n<\/style>\n<a href='https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2021\/10\/CONVENZIONALE-Campionoatori-Penterometro-dinamico-SPT.pdf' class='avia-color-theme-color avia-font-color-theme-color avia-button avia-button-fullwidth av-kv0sh37r-7170e3eee8a9e67cf565cfe4ca5daf12 avia-icon_select-yes-left-icon avia-color-theme-color'  target=\"_blank\"  rel=\"noopener noreferrer\"  aria-label=\"Technical data sheet (PDF Format)\"><span class='avia_button_icon avia_button_icon_left avia-iconfont avia-font-entypo-fontello' data-av_icon='\ue82d' data-av_iconfont='entypo-fontello' ><\/span><span class='avia_iconbox_title' >Technical data sheet (PDF Format)<\/span><\/a><\/div><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_third-9c1d454dc06f7247226bc4e8f931daae\">\n.flex_column.av-av_one_third-9c1d454dc06f7247226bc4e8f931daae{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-av_one_third-9c1d454dc06f7247226bc4e8f931daae av_one_third  avia-builder-el-5  el_after_av_two_third  el_before_av_one_third  flex_column_div av-zero-column-padding  '     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-1ed832f1e5272d9e00dc210b717f08af\">\n.avia-image-container.av-av_image-1ed832f1e5272d9e00dc210b717f08af img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-1ed832f1e5272d9e00dc210b717f08af .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-1ed832f1e5272d9e00dc210b717f08af av-styling- avia-align-center  avia-builder-el-6  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-1359 avia-img-lazy-loading-not-1359 avia_image ' src=\"https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-geomarc.jpg\" alt='' title='Martino SPT penetrometro dinamico geomarc'  height=\"1379\" width=\"850\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-geomarc.jpg 850w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-geomarc-185x300.jpg 185w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-geomarc-635x1030.jpg 635w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-geomarc-435x705.jpg 435w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-geomarc-450x730.jpg 450w\" sizes=\"(max-width: 850px) 100vw, 850px\" \/><\/div><\/div><\/div><\/div><\/p>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_third-9497bbf8bff73ea4c6992cc17fa9ec36\">\n.flex_column.av-av_one_third-9497bbf8bff73ea4c6992cc17fa9ec36{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-av_one_third-9497bbf8bff73ea4c6992cc17fa9ec36 av_one_third  avia-builder-el-7  el_after_av_one_third  el_before_av_two_third  first flex_column_div av-zero-column-padding  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-25a385239f31b7d721161bed17613ac0\">\n.avia-image-container.av-av_image-25a385239f31b7d721161bed17613ac0 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-25a385239f31b7d721161bed17613ac0 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-25a385239f31b7d721161bed17613ac0 av-styling- avia-align-center  avia-builder-el-8  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-1363 avia-img-lazy-loading-not-1363 avia_image ' src=\"https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-martino.jpg\" alt='' title='Martino SPT penetrometro dinamico coring convenzionale martino'  height=\"1618\" width=\"750\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-martino.jpg 750w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-martino-139x300.jpg 139w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-martino-477x1030.jpg 477w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-martino-695x1500.jpg 695w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-martino-327x705.jpg 327w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-martino-450x971.jpg 450w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/div><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_two_third-9c1d454dc06f7247226bc4e8f931daae\">\n.flex_column.av-av_two_third-9c1d454dc06f7247226bc4e8f931daae{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-av_two_third-9c1d454dc06f7247226bc4e8f931daae av_two_third  avia-builder-el-9  el_after_av_one_third  el_before_av_one_third  flex_column_div av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_heading-3aeb2805580c96c4289df916501a596b\">\n#top .av-special-heading.av-av_heading-3aeb2805580c96c4289df916501a596b{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-av_heading-3aeb2805580c96c4289df916501a596b .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-av_heading-3aeb2805580c96c4289df916501a596b .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-av_heading-3aeb2805580c96c4289df916501a596b av-special-heading-h2 blockquote modern-quote  avia-builder-el-10  el_before_av_table  avia-builder-el-first '><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Drop hammer<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<div class='avia-data-table-wrap av-av_table-41027eb08ab7e9b9a8ee5f6f76f48e71 avia_scrollable_table avia-table-1'><table  class='avia-table avia-data-table avia_pricing_minimal  avia-builder-el-11  el_after_av_heading  avia-builder-el-last '  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Table\" ><tbody><tr class='avia-heading-row'><th class='avia-center-col'>Item<\/th><th class='avia-center-col'>Part Name<\/th><\/tr><tr class=''><td class='avia-center-col'>1<\/td><td class='avia-center-col'>Anvil<\/td><\/tr><tr class=''><td class='avia-center-col'>2<\/td><td class='avia-center-col'>Gasket<\/td><\/tr><tr class=''><td class='avia-center-col'>3<\/td><td class='avia-center-col'>Tube<\/td><\/tr><tr class=''><td class='avia-center-col'>4<\/td><td class='avia-center-col'>Rod flange<\/td><\/tr><tr class=''><td class='avia-center-col'>5<\/td><td class='avia-center-col'>Washer<\/td><\/tr><tr class=''><td class='avia-center-col'>6<\/td><td class='avia-center-col'>Screw<\/td><\/tr><tr class=''><td class='avia-center-col'>7<\/td><td class='avia-center-col'> Hammer<\/td><\/tr><tr class=''><td class='avia-center-col'>8<\/td><td class='avia-center-col'>Cam<\/td><\/tr><tr class=''><td class='avia-center-col'>9<\/td><td class='avia-center-col'>Pin<\/td><\/tr><tr class=''><td class='avia-center-col'>10<\/td><td class='avia-center-col'>Tube<\/td><\/tr><tr class=''><td class='avia-center-col'>11<\/td><td class='avia-center-col'>Tooth<\/td><\/tr><tr class=''><td class='avia-center-col'>12<\/td><td class='avia-center-col'>Pivot<\/td><\/tr><tr class=''><td class='avia-center-col'>13<\/td><td class='avia-center-col'>Split pin<\/td><\/tr><tr class=''><td class='avia-center-col'>14<\/td><td class='avia-center-col'>Plug<\/td><\/tr><tr class=''><td class='avia-center-col'>15<\/td><td class='avia-center-col'>Pin<\/td><\/tr><tr class=''><td class='avia-center-col'>16<\/td><td class='avia-center-col'>Spring<\/td><\/tr><tr class=''><td class='avia-center-col'>17<\/td><td class='avia-center-col'>Guide ring<\/td><\/tr><tr class=''><td class='avia-center-col'>18<\/td><td class='avia-center-col'>Pin<\/td><\/tr><tr class=''><td class='avia-center-col'>19<\/td><td class='avia-center-col'>Screw<\/td><\/tr><tr class=''><td class='avia-center-col'>20<\/td><td class='avia-center-col'>Washer<\/td><\/tr><tr class=''><td class='avia-center-col'>21<\/td><td class='avia-center-col'>Nut<\/td><\/tr><\/tbody><\/table><\/div><\/p><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_third-9497bbf8bff73ea4c6992cc17fa9ec36\">\n.flex_column.av-av_one_third-9497bbf8bff73ea4c6992cc17fa9ec36{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-av_one_third-9497bbf8bff73ea4c6992cc17fa9ec36 av_one_third  avia-builder-el-12  el_after_av_two_third  el_before_av_two_third  first flex_column_div av-zero-column-padding  column-top-margin'     ><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_image-1a325e8b1a23fc942ef8cc5a0bf3fc0d\">\n.avia-image-container.av-av_image-1a325e8b1a23fc942ef8cc5a0bf3fc0d img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-av_image-1a325e8b1a23fc942ef8cc5a0bf3fc0d .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-av_image-1a325e8b1a23fc942ef8cc5a0bf3fc0d av-styling- av-img-linked avia-align-center  avia-builder-el-13  avia-builder-el-no-sibling '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><a href=\"https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-campionatore-357x1030.jpg\" data-srcset=\"https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-campionatore-357x1030.jpg 357w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-campionatore-104x300.jpg 104w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-campionatore.jpg 750w\" data-sizes=\"(max-width: 357px) 100vw, 357px\" class='avia_image '  aria-label='Martino SPT penetrometro dinamico coring convenzionale campionatore'><img decoding=\"async\" fetchpriority=\"high\" class='wp-image-1362 avia-img-lazy-loading-not-1362 avia_image ' src=\"https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-campionatore.jpg\" alt='' title='Martino SPT penetrometro dinamico coring convenzionale campionatore'  height=\"2161\" width=\"750\"  itemprop=\"thumbnailUrl\" srcset=\"https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-campionatore.jpg 750w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-campionatore-104x300.jpg 104w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-campionatore-357x1030.jpg 357w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-campionatore-521x1500.jpg 521w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-campionatore-245x705.jpg 245w, https:\/\/www.geomarcsrl.it\/wp-content\/uploads\/2015\/12\/Martino-SPT-penetrometro-dinamico-coring-convenzionale-campionatore-347x999.jpg 347w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/a><\/div><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_two_third-9c1d454dc06f7247226bc4e8f931daae\">\n.flex_column.av-av_two_third-9c1d454dc06f7247226bc4e8f931daae{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-av_two_third-9c1d454dc06f7247226bc4e8f931daae av_two_third  avia-builder-el-14  el_after_av_one_third  avia-builder-el-last  flex_column_div av-zero-column-padding  column-top-margin'     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_heading-aa80fa2b2a4c07ad5628d681d0de479d\">\n#top .av-special-heading.av-av_heading-aa80fa2b2a4c07ad5628d681d0de479d{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-av_heading-aa80fa2b2a4c07ad5628d681d0de479d .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-av_heading-aa80fa2b2a4c07ad5628d681d0de479d .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-av_heading-aa80fa2b2a4c07ad5628d681d0de479d av-special-heading-h2 blockquote modern-quote  avia-builder-el-15  el_before_av_table  avia-builder-el-first '><h2 class='av-special-heading-tag '  itemprop=\"headline\"  >Sampler<\/h2><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<div class='avia-data-table-wrap av-av_table-41027eb08ab7e9b9a8ee5f6f76f48e71 avia_scrollable_table avia-table-2'><table  class='avia-table avia-data-table avia_pricing_minimal  avia-builder-el-16  el_after_av_heading  avia-builder-el-last '  itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Table\" ><tbody><tr class='avia-heading-row'><th class='avia-center-col'>Item<\/th><th class='avia-center-col'>Part Name<\/th><\/tr><tr class=''><td class='avia-center-col'>1<\/td><td class='avia-center-col'>Shoe<\/td><\/tr><tr class=''><td class='avia-center-col'>2<\/td><td class='avia-center-col'>Point<\/td><\/tr><tr class=''><td class='avia-center-col'>3<\/td><td class='avia-center-col'>Head<\/td><\/tr><tr class=''><td class='avia-center-col'>4<\/td><td class='avia-center-col'>Split tube<\/td><\/tr><\/tbody><\/table><\/div><\/p><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-815","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Standard penetration test<\/title>\n<meta name=\"description\" content=\"The drop hammer has simple running, the whole set after hoisting is screwed to rods.\u00a0After removing safety pin, the outer tube.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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