Experimental Study on Slope's Superficial Dynamic Effect and Anchoring Prevention Mechanism Under Earthquake Disturbance
Bibliographic record
Abstract
By means of a series of large-scale shaking model tests,the mechanism of side slope's superficial dynamic effect under earthquake disturbance and its anchoring prevention were experimentally studied to the typical pattern of small collapse-slide and shallow soil damage along Dujiangyan to Yingxiu section of national highway No.213 in Wenchuan earthquake region.Using a 2.1 m height single-side model slope built by sand blended with clay and excited by three typical earthquake waves of 0.253g and 0.471g accelerations separately,the different quantitative dynamic response characteristics between the superficial and deep position of slope body were analyzed comparatively.These response analysis included magnification factors of acceleration,dynamic strain value and predominant frequency corresponding with three height prototype single-side slopes of 2.1 m,10.7 m and 21.5 m.The result showed that the accelerate response of slope body's surface was approximately 1.4 times of the deep position averagely,and predominant frequency of vibration was increased around 45 percent accordingly.In particularly,it presented significant dynamic shear strain of superficial stratum and dynamic tension-compression strain between the superficial and deep position,which reached 6.5 × 10-3 and 2.2 × 10-3 respectively and averages about soil's failure limit strain.Due to the stress superposition of the stripping action conducted by tension-compression strain of incompatible response movement between superficial and deep position and the kneading action deduced by shear strain,slope's superficial failure or damage were occurred.Furthermore,with comparative shaking table model tests between anchored slope and natural slope,the mechanism of superficial failure prevention effect of anchoring structures was preliminary studied.It was found that,anchoring structures could remarkably reduce superficial accelerate response by about 15 to 35 percent and increase natural frequency by 39 percent compared with the original natural slope at slope top in experiments.Anchoring prevention mechanism included as follows:firstly,earthquake resonant interaction was reduced due to higher natural frequency of anchored slope;secondly,the incompatible movement was diminished by anchoring structures which joined the slope's superficial and deep position into a whole;thirdly,stripping action induced by stress wave reflection on slope's surface was counteracted by the anchoring force.These results can provide references for road reconstruction and hazards prevention after earthquake.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".