{"id":780,"date":"2015-07-21T15:52:39","date_gmt":"2015-07-21T15:52:39","guid":{"rendered":"http:\/\/ground.geophysicsgpr.com\/?page_id=780"},"modified":"2017-03-10T19:06:15","modified_gmt":"2017-03-10T19:06:15","slug":"borehole","status":"publish","type":"page","link":"https:\/\/ground.geophysicsgpr.com\/en\/techniques\/seismic-ground-geophysics-methods\/borehole","title":{"rendered":"Borehole"},"content":{"rendered":"<div id=\"pl-780\"  class=\"panel-layout\" ><div id=\"pg-780-0\"  class=\"panel-grid panel-no-style\" ><div id=\"pgc-780-0-0\"  class=\"panel-grid-cell\" ><div id=\"panel-780-0-0-0\" class=\"so-panel widget widget_sow-editor panel-first-child panel-last-child\" data-index=\"0\" ><div class=\"texte-home-right article panel-widget-style panel-widget-style-for-780-0-0-0\" ><div\n\t\t\t\n\t\t\tclass=\"so-widget-sow-editor so-widget-sow-editor-base\"\n\t\t\t\n\t\t>\n<div class=\"siteorigin-widget-tinymce textwidget\">\n\t<p>Borehole seismic surveys can be carried out in several different ways. The Down-hole technique consists of measuring the arrival of seismic waves emitted from the surface in increments down the borehole. The Cross-hole technique uses a seismic source located in an adjacent borehole. The receiver in both cases is a tri-axial geophone. This enables profiles of seismic velocities from compressional (P) waves as well as shear (S) waves to be obtained. Accurate 2-D maps of seismic velocity variations between boreholes can be produced by processing the data using specialised software.<\/p>\n<h3>Borehole seismic techniques include down-hole, cross-hole and seismic tomography methodologies.<\/h3>\n<p><b>Typical applications of borehole seismic techniques include:<\/b><\/p>\n<ul>\n<li>Calculation of elastic moduli and dynamic rock and soil properties;<\/li>\n<li>Vs30 calculations for seismic site classification (National Building Code)<\/li>\n<li>Detection of faults, shear zones and voids;<\/li>\n<li>Diagnosis of problem areas in 2-D or 3-D;<\/li>\n<li>Pre and post-grouting surveys;<\/li>\n<li>Quality control tool for structural repairs;<\/li>\n<li>Quantitative evaluation of material by seismic velocity analysis ( i.e.Rippability or MRQD estimation by P-wave\u00a0velocities measurements);<\/li>\n<li>Seismic shear-wave and compressional wave velocity soundings;<\/li>\n<li>Determination of rock or concrete quality through the estimation of the dynamic coefficients of the materials;<\/li>\n<li>Detection of faults and shear zones in bedrock.<\/li>\n<\/ul>\n<p>For more information, please contact our\u00a0<a href=\"mailto:info@geophysicsgpr.com\">Ground Survey Team<\/a>.<\/p>\n<\/div>\n<\/div><\/div><\/div><\/div><\/div><div id=\"pg-780-1\"  class=\"panel-grid panel-no-style\" ><div id=\"pgc-780-1-0\"  class=\"panel-grid-cell\" ><div id=\"panel-780-1-0-0\" class=\"so-panel widget widget_sow-image panel-first-child panel-last-child\" data-index=\"1\" ><div class=\"panel-widget-style panel-widget-style-for-780-1-0-0\" ><div\n\t\t\t\n\t\t\tclass=\"so-widget-sow-image so-widget-sow-image-default-8b5b6f678277-780\"\n\t\t\t\n\t\t>\n<div class=\"sow-image-container\">\n\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ground.geophysicsgpr.com\/wp-content\/uploads\/sites\/7\/2015\/07\/tech_borehole2.jpg\" width=\"222\" height=\"212\" sizes=\"auto, (max-width: 222px) 100vw, 222px\" title=\"Sismique en forage\" alt=\"Sismique en forage\" \t\tclass=\"so-widget-image\"\/>\n\t<\/div>\n\n<\/div><\/div><\/div><\/div><div id=\"pgc-780-1-1\"  class=\"panel-grid-cell panel-grid-cell-mobile-last\" ><div id=\"panel-780-1-1-0\" class=\"so-panel widget widget_sow-image panel-first-child panel-last-child\" data-index=\"2\" ><div class=\"panel-widget-style panel-widget-style-for-780-1-1-0\" ><div\n\t\t\t\n\t\t\tclass=\"so-widget-sow-image so-widget-sow-image-default-8b5b6f678277-780\"\n\t\t\t\n\t\t>\n<div class=\"sow-image-container\">\n\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ground.geophysicsgpr.com\/wp-content\/uploads\/sites\/7\/2015\/07\/Ground_Techniques_Downhole-Method.jpg\" width=\"225\" height=\"187\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" title=\"Ground Techniques Downhole Method\" alt=\"Ground Techniques Downhole Method\" \t\tclass=\"so-widget-image\"\/>\n\t<\/div>\n\n<\/div><\/div><\/div><\/div><div id=\"pgc-780-1-2\"  class=\"panel-grid-cell panel-grid-cell-empty\" ><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Borehole seismic surveys can be carried out in several different ways. The Down-hole technique consists of measuring the arrival of seismic waves emitted from the surface in increments down the borehole. The Cross-hole technique uses a seismic source located in an adjacent borehole. The receiver in both cases is a tri-axial geophone. This enables profiles&#8230;  <a href=\"https:\/\/ground.geophysicsgpr.com\/en\/techniques\/seismic-ground-geophysics-methods\/borehole\" class=\"more-link\" title=\"Read Borehole\">Read more &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":1118,"parent":738,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-full-width.php","meta":{"content-type":"","footnotes":""},"class_list":["post-780","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/ground.geophysicsgpr.com\/en\/wp-json\/wp\/v2\/pages\/780","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ground.geophysicsgpr.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/ground.geophysicsgpr.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/ground.geophysicsgpr.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ground.geophysicsgpr.com\/en\/wp-json\/wp\/v2\/comments?post=780"}],"version-history":[{"count":2,"href":"https:\/\/ground.geophysicsgpr.com\/en\/wp-json\/wp\/v2\/pages\/780\/revisions"}],"predecessor-version":[{"id":3040,"href":"https:\/\/ground.geophysicsgpr.com\/en\/wp-json\/wp\/v2\/pages\/780\/revisions\/3040"}],"up":[{"embeddable":true,"href":"https:\/\/ground.geophysicsgpr.com\/en\/wp-json\/wp\/v2\/pages\/738"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ground.geophysicsgpr.com\/en\/wp-json\/wp\/v2\/media\/1118"}],"wp:attachment":[{"href":"https:\/\/ground.geophysicsgpr.com\/en\/wp-json\/wp\/v2\/media?parent=780"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}