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Structural Backfill

bridge.approach_earthwork_system.structural_backfill

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Definition

Selected compacted fill placed around or behind bridge structures.

Class kind: component
Abstract: no
Depth: 2
Origin: reference source
Ontology: engineering-reference-book.bridge v1.0.0
Aliases: Selected Backfill, Granular Backfill, Found Bkfill Matl, Foundation Backfill
Abbreviations: —
Last changed: 7/27/2026, 2:50:05 PM

Identification

Positive labels: Structural Backfill, Selected Backfill, Granular Backfill, Found Bkfill Matl, Foundation Backfill
Negative labels: —
Visual features: backfill hatch behind wall or around foundation
Min identity clues: 2

Evidence

Preferred views: section, plan, specification
Evidence types: view, detail, schedule, note, dimension, level, section_callout
Source trace required: yes

Measurements (2)

Name	Symbol	Unit	Required
Volume	`V`	m3	required
Material Type	`MAT`	—	required

Relationships (2)

placed_behindbridge.substructure.abutment_system
placed_aroundbridge.foundation_system

BOQ items (1)

Item code	Formula	Result	Unit
`bridge.earthwork.structural_backfill.volume`	`V`	volume	m3

Validation

Blocking if missing: yes
Human review allowed: yes

no_evidence_no_number
retain_document_page_bbox_and_evidence_id
do_not_mix_drawing_revisions
do_not_average_conflicting_values
prefer_explicit_labels_over_shape_only
match_plan_elevation_and_section_when_applicable

Provenance

Basis: engineering_reference
Project values included: no
regional_terminology: no page list

Children (0)

None — this is a leaf class and can be deleted.