SEISMIC STABILITY OF CEMENT TREATED GROUND BY TILTlNG AND DYNAMIC SHAKlNG TABLE TESTS

スポンサーリンク

概要

• 論文の詳細を見る

• A series of tilting tests and shaking table tests was conducted with a geotechnical centrifuge apparatus to determine the dynamic active earth pressure of cement treated clay ground by investigating the seismic stability of cement treated clay ground having an unsupported vertical slope. In the tilting tests, the horizontal seismic inertia force was simulated statically by tilting the whole model ground in accordance with the horizontal seismic coefficient k_h. The tilted model ground was subjected to monotonically increasing centrifugal acceleration until it failed due to the enhanced selfweight. In the shaking table tests, on the other hand, the model ground was subjected to dynamic excitations under a high centrifugal acceleration field. The magnitude of the dynamic excitation was increased stepwise until the model ground failed. It was found from both test results that the model ground failed with a combination of a vertical tensile crack and a straight shear failure plane, which was much different from the failure phenomenon of sandy or clayey ground. It was also found that the conventional pseudo-static limit equilibrium method such as Mononobe-Okabe's earth pressure theory was not able to evaluate the critical height and the failure zone of the model ground accurately. Based on the model test results, a modified pseudo-static limit equilibrium method incorporating the tensile force along the crack plane was proposed in this study. In the method, the critical height and the failure zone of the cement treated ground were influenced by the strength ratio of the tensile strength to the compressive strength of the treated soil. It was found that the proposed method with a suitable strength ratio was able to predict the tilting test results with fairly high accuracy. Also, the proposed method seemed to be able to reasonably explain the shaking test results if the dynamic response acceleration of the model ground was carefully taken into account. Dynamic active earth pressure of cement treated clay ground was also discussed in which the importance of incorporating the failure pattern was emphasized.

• 社団法人地盤工学会の論文
• 2003-12-15

著者

• 北誥 昌樹

  Soil Stabilization Division Geotechnical And Structural Engineering Department Port And Airport Rese

• 北詰 昌樹

  港湾空港技研

• 橋爪 秀夫

  Technical Division Geodesign Co. Ltd.

• 早野 公敏

  Senior Researcher, ditto

• 早野 公敏

  Senior Researcher Ditto

関連論文

• 地盤改良効果の予測と経験の活用
• EFFECTS OF THE STIFFNESS OF SOFT CLAY LAYER ON STRONG MOTION RESPONSE
• EFFECTS OF THE STIFFNESS OF SOFT CLAY LAYER ON STRONG MOTION RESPONSE
• 液状化遠心模型実験における飽和砂地盤の作製方法とその有効性に関する検討
• SEISMIC STABILITY OF CEMENT TREATED GROUND BY TILTlNG AND DYNAMIC SHAKlNG TABLE TESTS
• CENTRIFUGE MODEL TESTS ON FAILURE OF CEMENT STABILIZED FLY ASH GROUND
• 第31回 CEN/TC288/WG11深い排水工法 会議出席報告

スポンサーリンク