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<div>{{出典の明記|date=2016年5月}}<br />
'''N値'''（エヌち、[[英語]]：N-value）とは、[[標準貫入試験]]（[[日本工業規格|JIS]] A 1219）によって求められる地盤の強度等を求める試験結果（数値）である。標準貫入試験値とも言う。<br />
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その定義は『質量63.5±0.5kgの[[建設機械#一般建設機械|ドライブハンマー（通称、モンケン）]]を76±1cm自由落下させて、[[ボーリング]]ロッド頭部に取り付けたノッキングブロックを打撃し、ボーリングロッド先端に取り付けた[[標準貫入試験]]用サンプラーを地盤に30cm打ち込むのに要する打撃回数』である。<br />
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== N値の利用 ==<br />
N値を用いて、地盤の硬さや締まりの程度を評価したり、[[基礎]]や地盤反力等の設計に必要な地盤定数（土質定数）の推定に利用する<ref>[http://www.webstore.jsa.or.jp/webstore/Com/FlowControl.jsp?lang=jp&bunsyoId=JIS+A+1219%3A2001&dantaiCd=JIS&status=1&pageNo=0 規格詳細情報-JIS_A_1219:2001]JSA WEB Store（日本規格協会ホームページ）</ref>。<br />
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==出典==<br />
<references/> <br />
<br />
== 関連項目 ==<br />
*[[土質力学]]<br />
*[[液状化現象]]<br />
*[[鋼管杭]]<br />
*[[軟弱地盤]]<br />
*[[地盤沈下]]<br />
*[[地盤調査]]<br />
*[[スウェーデン式サウンディング試験]]<br />
*[[地すべり]]調査<br />
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{{DEFAULTSORT:えぬち}}<br />
[[Category:土質力学]]<br />
[[Category:地盤工学]]<br />
[[Category:地質調査]]<br />
[[Category:地質学]]<br />
[[Category:建築構造]]</div>240F:80:BA13:1:A045:375E:3F0A:902A Warning: Cannot modify header information - headers already sent by (output started at /home/users/1/sub.jp-asate/web/wiki/extensions/HeadScript/HeadScript.php:3) in /home/users/1/sub.jp-asate/web/wiki/includes/WebResponse.php on line 46