Impact Analysis of Wall-Caisson Composite Structure Construction Adjacent to Rail Transit Bridge
Bibliographic record
Abstract
[Objective] The construction deformation control adjacent to operational railways is of utmost importance in current rail transit planning and construction. Therefore, it is necessary to study the effect of the diaphragm wall-caisson composite structure （hereinafter referred to as WCCS）parameters on the structural stress deformation characteristics, which are caused by the caisson interior excavation and the change patterns of the surrounding soil displacement. [Method] In the case study of a composite structure construction project adjacent to Shanghai-Suzhou-Nantong Railway Bridge in Nantong City, the finite-element software is used to analyze the internal forces, deformations, and the surrounding ground settlement patterns of the WCCS. [Result & Conclusion] Firstly, the caisson under the protection of a circular diaphragm wall exhibits relatively small horizontal deformation. Increasing the thickness of both the caisson and diaphragm wall will reduce the maximum deformation and stress in the WCCS itself. However, within the 3~5 m width range of sandwiched soil, the widening of sandwiched soil leads to increased stress and deformation in the diaphragm wall, with a sudden spike particularly observed at the 5 m width of sandwiched soil. Secondly, the uplift value of the bottom-sealed concrete and sandwiched soil is less affected by the thickness of the WCCS. However, within the 3~5 m width range of sandwiched soil, the soil uplift value first increases and then decreases, with the turning point occurring at the 4.5 m width of sandwiched soil. Thirdly, increasing the thickness of the caisson and diaphragm wall reduces the boundary of surrounding ground settlement, with particularly significant weakening effect of the caisson thickness. The width of sandwiched soil has a significant impact on ground settlement, which begins to increase markedly when the width exceeds 3.5 m. Lastly, a well-designed WCCS can improve the stability of the caisson and reduce the deformation impact of caisson construction on the surrounding environment.
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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) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.004 | 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".