JP4993132B2 - 既設構造物の基礎補強工法 - Google Patents
既設構造物の基礎補強工法 Download PDFInfo
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- JP4993132B2 JP4993132B2 JP2008052020A JP2008052020A JP4993132B2 JP 4993132 B2 JP4993132 B2 JP 4993132B2 JP 2008052020 A JP2008052020 A JP 2008052020A JP 2008052020 A JP2008052020 A JP 2008052020A JP 4993132 B2 JP4993132 B2 JP 4993132B2
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- 230000002787 reinforcement Effects 0.000 title claims description 75
- 238000000034 method Methods 0.000 title claims description 19
- 230000003014 reinforcing effect Effects 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 description 12
- 238000010276 construction Methods 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Claims (2)
- 既設構造物の基礎を補強する工法であって、
既設構造物の基礎になっている複数本の既設の基礎杭から所定の1本以上の基礎杭を補強対象杭として選択し、既設構造物の直下の地盤に既設構造物の底面に沿って補強対象杭に達する横穴を掘削して、補強対象杭の上部を横穴内に露出させる工程と、
補強対象杭の周囲の地盤を横穴から下方に掘り進めて、補強対象杭より大径の拡径穴を掘削する工程と、
拡径穴と横穴内に露出する補強対象杭の上部周囲とにコンクリートを打設して、補強対象杭の周囲にコンクリートによる拡径補強部を構築する工程とを備え、
拡径穴を掘削する工程では、所定深さ掘削する度に掘削済みの拡径穴の部分の周面に板状の支保材を配置することを繰り返して、拡径穴の周面に上下多段に支保材を配置すると共に、所定の複数の段の支保材の配置時に、当該支保材と補強対象杭との間に放射状に複数の梁部材を介設することを特徴とする既設構造物の基礎補強工法。 - 前記拡径補強部を構築した後、前記横穴にコンクリートを打設して、地中梁を構築する工程を備えることを特徴とする請求項1記載の既設構造物の基礎補強工法。
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JP2008052020A JP4993132B2 (ja) | 2008-03-03 | 2008-03-03 | 既設構造物の基礎補強工法 |
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JP2008052020A JP4993132B2 (ja) | 2008-03-03 | 2008-03-03 | 既設構造物の基礎補強工法 |
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JP2009209548A JP2009209548A (ja) | 2009-09-17 |
JP4993132B2 true JP4993132B2 (ja) | 2012-08-08 |
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Families Citing this family (2)
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JP6546428B2 (ja) * | 2015-03-30 | 2019-07-17 | 株式会社熊谷組 | 既設杭基礎補強構造物 |
CN110714473B (zh) * | 2019-10-30 | 2021-10-08 | 河南聚匠机械设备安装工程有限公司 | 一种根基施工方法 |
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JP3213240B2 (ja) * | 1996-07-11 | 2001-10-02 | 株式会社奥村組 | 既設構造物の支持杭補強構造とその補強方法 |
JP4699023B2 (ja) * | 2004-12-28 | 2011-06-08 | 靖子 長谷川 | 柱状構造物の補強方法 |
JP4705497B2 (ja) * | 2006-03-27 | 2011-06-22 | 株式会社竹中工務店 | 既存建物の杭基礎の補強方法 |
JP4722783B2 (ja) * | 2006-07-03 | 2011-07-13 | 株式会社竹中工務店 | 既存建物の基礎補強工法 |
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