SOIL DENSIFICATION DUE TO STATIC SAND PILE INSTALLATION FOR LIQUEFACTION REMEDIATION
スポンサーリンク
概要
- 論文の詳細を見る
Among various soil densification techniques, the sand compaction pile (SCP) has been one of the most frequently used methods to improve loose deposits of sandy soils encountered in Holocene or reclaimed lands. In this method, columns of densely compacted sand are created in the ground by imparting vibration to the sand at the bottom of a pipe which is lifted stepwise while supplying sand from the ground surface. Because of noise and vibration produced during its installation, the SCP is losing its popularity and an alternative technique employing a static driving force is being exploited to install columns of dense sand. To study the degree of soil densification due to such static sand pile installation, multiple series of large-scale hollow cylindrical torsional shear tests were conducted in the laboratory on clean fine sand, simulating stress changes conceived to be occurring in a soil element in the vicinity of the pile being penetrated. To determine the stress changes in the field during the pile penetration, analysis was conducted based on the classical theory of elasticity. The sequence of stress changes thus established was applied to saturated sand specimens prepared in a torsional hollow cylindrical shear test apparatus. This process allows complex stress paths to be reproduced in the specimens, including the rotation of a principal stress direction. In the course of the tests, shear stresses were applied first undrained on loose and medium dense fine sands and induced pore water pressure was dissipated by opening the valve of the drainage system, thereby monitoring the volume decrease of saturated samples. Particular attention was drawn to the influence of the amount of shear strains imposed undrained on the soil specimens on the subsequent drained volume changes. It was found that a volume change of 5〜10% was observed in the test samples, which is considered sufficiently great to bring about substantial densification in the sand. The experimental results of the tests were shown to provide a basis for the assessment of soil densification due to static sand pile penetration. On this basis, a diagram was provided to facilitate the evaluation of the degree of soil densification. In addition, case studies were carried out by taking advantage of soil improvement projects which have recently been implemented at three sites in Japan. These are considered to provide field verification on the effectiveness of soil densification due to static sand pile installation. Finally the degree of in-situ densification as evidenced by increased SPT N-value was interpreted in the framework of the conception established through the laboratory tests.
- 社団法人地盤工学会の論文
- 2000-04-15
著者
-
塚本 良道
Department of Civil Engineering, Tokyo University of Science
-
石原 研而
Department of Civil Engineering, Science University of Tokyo.
-
原田 健二
不動建設(株)ジオ・エンジニアリング本部技術統轄部技術管理室
-
山本 実
不動建設(株)ジオ・エンジニアリング本部技術統轄部
-
山本 実
Soil Engineering Division, Fudo Construction Co., Ltd.
-
原田 健二
Soil Engineering Division, Fudo Construction Co., Ltd.
-
矢部 浩史
Fudo Construction Co., Ltd. (Formerly graduate student, Department of Civil Engineering, Science Uni
-
塚本 良道
東京理科大学理工学部土木工学科
-
塚本 良道
Department Of Civil Engineering Tokyo University Of Science
-
石原 研而
Department Of Civil Engineering Chuo University:department Of Civil Engineering Tokyo University Of
-
Ishihara K
Chuo Univ. Tokyo Jpn
-
矢部 浩史
Fudo Construction Co. Ltd. (formerly Graduate Student Department Of Civil Engineering Science Univer
-
石原 研而
中央大学
-
Ishihara Kenji
Department Of Civil Engineering Tokyo Science University
関連論文
- USE OF COMPRESSIBLE EXPANDED POLYSTYRENE BLOCKS AND GEOGRIDS FOR RETAINING WALL STRUCTURES
- 大型可動壁模型土槽におけるジオグリツド補強砂の補強効果
- 平面にひずみ状態において, ジオグリッドを用いた補強した粒状土の強度・変形特性
- DEFORMATION AND STRENGTH OF GEOGRID-REINFORCED GRANULAR SOIL AT PLANE STRAIN CONDITIONS
- 大径化・高速化対応型の深層混合処理工法の開発 : 進化したCI-CMC工法
- 地盤の弾性波速度による液状化発生条件の検討
- RESISTANCE OF PARTLY SATURATED SAND TO LIQUEFACTION WITH REFERENCE TO LONGITUDINAL AND SHEAR WAVE VELOCITIES
- EFFECTS OF LARGE PRESHEARING ON CYCLIC BEHAVIOR OF SAND
- YIELDING OF OVERCONSOLIDATED SAND AND LIQUEFACTION MODEL UNDER CYCLIC STRESSES
- 20351 液状化地盤における杭基礎構造物の3次元的挙動
- 抗土圧構造物の設計理論と実際 : 擁壁の変形と土圧・破壊メカニズムに関する一考察(施工過程を考慮した地盤の変形・破壊の予測)
- 20261 締固め改良地盤の改良範囲と沈下挙動に関する研究 : 円形せん断土槽を用いた振動台実験(液状化(1),構造I)
- 20226 液状化による直接基礎の沈下挙動と沈下予測に関する研究 : その2 沈下解析と沈下予測法(動的問題・液状化(2),構造I)
- 20225 液状化による直接基礎の沈下挙動と沈下予測に関する研究 : その1 実験概要と実験結果(動的問題・液状化(2),構造I)
- 第2回地震豪雨地盤災害に関する日本・台湾合同ワークショップの開催報告(学会活動から)
- 4b.地震関連問題(第16回国際地盤工学会議(大阪)・第2回日中地盤工学シンポジウム(上海))
- 地震時の地すべりと土砂流動 (特集 土砂災害と対策・復旧)
- 4. 地震時の基礎杭に及ぼす液状化と地盤流動の影響(第11回アジア地域会議 (ソウル))
- 地盤液状化研究の現状と既設石油タンク等の地盤液状化対策 (特集 地震対策)
- 20398 大地震時の締固め改良地盤における液状化判定に関する考察
- EVALUATING SUPERPOSITION ERRORS IN BEARING CAPACITY FACTORS FROM SOKOLOVSKI'S METHOD OF CHARACTERISTICS
- SETTLEMENT OF SILTY SAND DEPOSITS FOLLOWING LIQUEFACTION DURING EARTHQUAKES
- RESPONSE OF PILE GROUPS AGAINST SEISMICALLY INDUCED LATERAL FLOW IN CENTRIFUGE MODEL TESTS
- CORRELATION BETWEEN PENETRATION RESISTANCE OF SWEDISH WEIGHT SOUNDING TESTS AND SPT BLOW COUNTS IN SANDY SOILS
- 4.3 地盤改良の最近の技術(第15回国際地盤工学会議)
- EPS緩衝材を有するジオグリッド補強砂の土圧に関する大型模型土槽実験
- 「地盤工学会論文報告集(SOILS AND FOUNDATIONS)」懇談会((座談会))
- 地下水揚水法による汚染地盤の修復効果に関する一考察(汚染地盤の修復)
- 2662 締固め砂杭工法を用いた緩い砂質地盤の液状化対策の新しい設計方法
- 20335 締固め改良地盤におけるN値と液状化強度に及ぼす静止土圧係数の影響
- 液状化対策に用いられる静的締固め砂杭工法による地盤の密度増加(『地盤工学会論文報告集』Vol.40,No.2 (2000年4月発行)掲載論文の概要)
- SOIL DENSIFICATION DUE TO STATIC SAND PILE INSTALLATION FOR LIQUEFACTION REMEDIATION
- 静的締固め砂杭工法(SAVEコンポーザー)および建設発生土を利用した地盤改良工法(リソイル工) (特集 基礎における技術評価工法(土木))
- 20303 建築構造物の直接基礎における締固め改良地盤の評価
- 土質特性と地盤の挙動
- 埋立て地盤の液状化対策とその効果
- UNDRAINED DEFORMATION AND LIQUEFACTION OF SAND UNDER CYCLIC STRESSES
- PREDICTION OF LIQUEFACTION IN SAND DEPOSITS DURING EARTHQUAKES
- SAND LIQUEFACTION IN HOLLOW CYLINDER TORSION UNDER IRREGULAR EXCITATION
- CYCLIC SIMPLE SHEAR TESTS ON SATURATED SAND IN MULTI-DIRECTIONAL LOADING
- YIELDING OF LOOSE SAND IN THREE-DIMENSIONAL STRESS CONDITIONS
- UNDRAINED DEFORMATION CHARACTERISTICS OF SAND IN MULTI-DIRECTIONAL SHEAR
- YIELDING OF LOOSE SAND IN THREE-DIMENSIONAL STRESS CONDITIONS
- ANISOTROPIC DEFORMATION CHARACTERISTICS OF SAND UNDER THREE DIMENSIONAL STRESS CONDITIONS
- SUBSIDENCE OF BUILDING FOUNDATION RESTING UPON LIQUEFIED SUBSOIL : CASE STUDIES AND ASSESSMENT
- 大型振動台による液状化地盤中の水平流動(側方変位・流動の予測と対策)
- 静的締固め工法(SAVEコンポーザー)--静かな締固めを可能とした革新的な地盤改良工法 (特集 軟弱地盤対策)
- THEORETICAL MODELLING OF SPUDCAN BEHAVIOUR UNDER COMBINED LOAD
- CYCLIC STRENGTH OF UNDISTURBED SANDS OBTAINED BY A PISTON SAMPLER
- EFFECTS OF SUPERIMPOSING CYCLIC SHEAR STRESS ON THE UNDRAINED BEHAVIOR OF SATURATED SAND UNDER MONOTONIC LOADING
- 砂質土に関する標準貫入試験N値と相対密度との関係(『地盤工学会論文報告集』Vol.39,No.5 (1999年10月発行)掲載論文の概要)
- 2635 締固め工法における中詰め材料としてのリサイクル材の適用性と評価(新しい地盤材料の評価方法)
- 「地盤工学教育・技術者資格の課題に関する国際講演会」および「Hight博士による特別講演会」開催報告
- 石原研而教授 H. Bolton Seed Medalを受賞
- 神戸埋立て地盤から採取された土の非排水せん断変形強度特性(『地盤工学会論文報告集』S & F阪神大震災特別号No.2 (1998年9月発行)掲載論文の概要)
- SIMPLIFIED METHOD FOR ANALYSIS OF PILES UNDERGOING LATERAL SPREADING IN LIQUEFIED SOILS
- EMPIRICAL CORRELATION BETWEEN SPT N-VALUE AND RELATIVE DENSITY FOR SANDY SOILS
- FLOW POTENTIAL OF SANDY SOILS WITH DIFFERENT GRAIN COMPOSITIONS
- STATE CONCEPT AND MODIFIED ELASTOPLASTICITY FOR SAND MODELLING
- CHARACTERIZATION OF UNDRAINED BEHAVIOUR OF SOILS IN THE RECLAIMED AREA OF KOBE
- EMPIRICAL CORRELATION BETWEEN SPT N-VALUE AND RELATIVE DENSITY FOR SANDY SOILS
- STATE CONCEPT AND MODIFIED ELASTOPLASTICITY FOR SAND MODELLING
- MODELLING OF SAND BEHAVIOUR BASED ON STATE CONCEPT
- NORMALIZED BEHAVIOR OF VERY LOOSE NON-PLASTIC SOILS : EFFECTS OF FABRIC
- THE STEADY STATE OF SANDY SOILS
- THE STEADY STATE OF SANDY SOILS
- EVALUATION OF SETTLEMENTS IN SAND DEPOSITS FOLLOWING LIQUEFACTION DURING EARTHQUAKES
- LIQUEFACTION-ASSOCIATED GROUND DAMAGE DURING THE VRANCEA EARTHQUAKE OF MARCH 4,1977
- ANALYSIS OF LANDSLIDES DURING THE 1978 IZU-OHSHIMA-KINKAI EARTHQUAKE
- 地盤工学の発展-過去, 現在, 未来(地盤工学の展望 : 地盤工学全般・防災分野)
- 国際地盤工学会4年間(1997〜2001)の歩み
- 創造的技術の地盤改良, 佐丸雄治・関山龍一著, B5判, 192ページ, 2001年8月15日発行, 価格 3500円(税別), 発行所 理工図書株式会社, 〒102-0071 東京都千代田区富士見1-8-19, 電話 03-3230-0221
- UNDRAINED SHEAR CHARACTERISTICS OF SATURATED SAND UNDER ANISOTROPIC CONSOLIDATION
- 異なる粒子構造を持つ砂質土の流動ポテンシャル(『地盤工学会論文報告集』Vol.40,No.4 (2000年8月発行)掲載論文の概要)
- 粒状材料における非共軸性とエネルギー消散(『地盤工学会論文報告集』Vol.40,No.2 (2000年4月発行)掲載論文の概要)
- 国際化に向けての歩み(地盤工学会創立50周年記念)
- 締固め改良地盤における改良効果のN値による評価 (特集 N値の活用と留意点)
- 鉛直シート材料の遮水性確認試験
- NUMERICAL MODELLING OF THREE-LEG JACKUP BEHAVIOUR SUBJECT TO HORIZONTAL LOAD
- 真空圧密とPDFシステムを併用した新しい圧密促進工法(地盤改良)
- 2. 調査・分類 : サンプリングおよび評価, サウンディング (コーン, その他)(第35回地盤工学研究発表会)
- ANALYSIS OF PERMANENT DEFORMATION OF EARTH DAMS DUE TO EARTHQUAKES
- MAXIMUM AND MINIMUM VOID RATIO CHARACTERISTICS OF SANDS
- SAND LIQUEFACTION THROUGH VOLUME DECREASE POTENTIAL
- P.Lumbレクチャーについて
- YIELDING AND FLOW OF SAND UNDER PRINCIPAL STRESS AXES ROTATION
- MODEL FOR THE DEFORMATION OF SAND DURING ROTATION OF PRINCIPAL STRESS DIRECTIONS
- SIMPLE METHOD OF ANALYSIS FOR LIQUEFACTION OF SAND DEPOSITS DURING EARTHQUAKES
- DRAINED DEFORMATION OF SAND UNDER CYCLIC STRESSES REVERSING DIRECTION
- YIELDING OF SAND IN TRIAXIAL COMPRESSION
- SHEAR WORK AND PORE WATER PRESSURE IN UNDRAINED SHEAR
- UNDRAINED STRENGTH OF SAND UNDERGOING CYCLIC ROTATION OF PRINCIPAL STRESS AXES
- Liquefaction-Induced Flow Slide in the Collapsible Loess Deposit in Soviet Tajik(石原研而他著,本誌Vol.30,No.4,1990年12月掲載)
- 建築物における締固め工法による液状化対策効果の検証 (特集 2011東日本大震災の教訓と復旧 : 建築物と産業施設)
- 宅地地盤の液状化対策工法の開発と適用 : 小型締固め式グラベルドレーン工法(造成宅地の耐震技術)