T/JSAS 039-2023 Active Group standards

T/JSAS 039-2022 Technical Specifications for Gravity Dock Caisson Bed Filling Technology

T/JSAS 039-2023

Publish Date: 2023-07-24 Implement Date: 2023-07-25 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/JSAS 039-2023

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: Port-specific facilities

ICS Name: Waterway transportation

Publish Date: 2023-07-24

Implement Date: 2023-07-25

Pages: 10 pages

Scope

Scope: This document specifies the stone materials, construction, and acceptance, as well as safety and environmental protection for the gravity-type caisson foundation bed filling technology. This document applies to the design, construction, and acceptance of gravity-type caisson foundation beds; Main technical content: 3.3 Caisson Foundation Bed The caisson foundation bed trench is backfilled to form a diffusion caisson structure that transfers loads to the foundation through a load-transfer layer. 4 Stone Materials 4.1 Stone Material Preparation 4.1.1 Before construction, stone materials should be sampled and analyzed for physical and mechanical indicators. 4.1.2 Stone physical indicators should include weight and particle size, and mechanical indicators should include strength, etc. 4.2 Stone Performance Indicators The stone performance indicators should comply with Table 1. Table 1 Stone Performance Indicators Serial Number Item Indicator 1 Visual Quality Generally square, unweathered, not flaky, and no cracks 2 Uniaxial Compressive Strength ≥50 MPa 3 Weight 10-100 kg 4.3 Test Methods 4.3.1 Inspection of stone visual quality can be carried out by visual observation. 4.3.2 Calculation of uniaxial compressive strength: The uniaxial compressive strength of stone should be calculated according to the following formula: where, R—-uniaxial compressive strength of rock (MPa), accurate to 0.001 MPa; P—destructive load of specimen (N); A—cross-sectional area of specimen (mm2). 5 Design 5.1 Rock-filled foundation beds can adopt forms such as submerged foundation beds, exposed foundation beds, or mixed foundation beds according to the water depth, terrain, and foundation conditions of the pier. 5.2 The thickness of the rock-filled foundation bed should meet the following requirements: a) When the stress at the top of the foundation bed is greater than the bearing capacity of the foundation, it shall be determi