Gabion Fill Stone, Filter and Geotextile Interface Inputs

Decision boundary

This guide decides: which fill, filter, subgrade, placement and responsibility inputs must be coordinated.

This guide does not decide: stone grading, filter class, geotextile selection, bearing preparation, hydraulic adequacy or installation approval.

Make mesh-to-fill compatibility explicit.

Record the approved grading, durability, shape, density or appearance requirements and the relationship to the mesh opening and unit depth. Confirm whether fill is local, buyer-supplied or part of another contract.

Define the filter function and interface.

State whether the project requires soil retention, drainage separation, filtration or another function. Provide subgrade, water, overlap, transition and adjoining-work information to the responsible designer; do not select a geotextile from a generic product label.

Control placement and visible-face requirements.

Describe access, lifting, machine or hand placement limits, face quality, bracing/formwork responsibility, overfill or settlement allowance policy and inspection hold points. These inputs affect the commercial scope but do not become site instructions on this page.

Decision ledger

Use the actual condition to route the next review. This ledger is not a design table, rating or installation instruction.

ConditionBuyer recordsNext control

Fill sourceLocal or supplied, grading, durability and availabilityApproved fill schedule

RetentionMesh opening, fill grading and escape riskDesigner-confirmed compatibility

FilterSoil, water, drainage and filtration objectiveProject filter/geotextile design

PlacementAccess, method, face control and hold pointsMethod statement and inspection plan

Project-input schedule

Issue the same controlled inputs to every supplier. Keep unknowns open with an owner and due date.

FillSource, grading, durability and visual requirement.

MeshOpening, unit depth and containment interface.

SubgradeSoil, profile, water and preparation basis.

FilterFunction, product/specification and transitions.

PlacementAccess, method, face control and damage prevention.

ScopeSupply, testing, installation and acceptance owners.

What a usable supplier response returns

The response identifies the exact offered mesh or cage, unit and component quantities, material and coating basis, drawings, packing and document register. It separates confirmations from assumptions, options, exclusions and deviations. Civil, structural, hydraulic, geotechnical and rockfall decisions remain with their responsible project authorities.

Questions to close

Who approves fill grading and durability?
How is escape through the mesh prevented?
What function must the filter perform?
Who selects the geotextile and transitions?
Which placement and inspection records are required?

Authoritative reference boundary

These sources define scope and decision boundaries. They do not certify a XIEHENG product or approve a project.

FHWA FP-14 Section 253 — gabions and revet mattressesSeparates baskets from shallow mattresses and connects drawings, assembly, diaphragms, fasteners, rock, filters and foundations. It is a US construction reference, not a universal project specification.FHWA HEC-15 — flexible channel liningsTreats gabion lining selection as a hydraulic design task based on applied and permissible shear and site conditions. It does not support a generic velocity rating.FHWA HEC-23 — gabion mattress design guidanceDiscusses bank, bed-armour and scour applications and records uncertainty for some bridge-pier uses. Project hydraulics and durability review remain controlling.