GB/T 26470-2025General specification for launching gantries (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document replaces GB/T 26470-2011 "General Technical Requirements for Bridge Erection Machines". Compared with GB/T 26470-2011, in addition to the structural adjustment In addition to editorial changes, the main technical changes are as follows.

--- Changed the scope (see Chapter 1, Chapter 1 of the 2011 edition);

--- Changed the terms "bridge erection machine" and "segmental assembly erection" and their definitions (see 3.1 and 3.5, 3.1 and 3.2 of the 2011 edition), and added the terms "walking through-hole bridge-erector-machine", "track-type through-hole bridge-erector-machine" and "beam trolley" and their definitions (see 3.2, 3.3 and 3.9);

--- The type has been changed (see 4.1, 4.1 of the 2011 edition);

--- Changed the values that should be used first for the rated lifting weight and rated load of the bridge crane (see 4.2.2, 4.2.2 of the 2011 edition);

--- Added motor operating conditions (see 5.1.4);

--- Increased the bearing capacity requirements for the foundation of the supporting bridge erection machine (see 5.1.6);

--- Changed the minimum curve radius of the bridge erecting machine (see 5.1.7, 5.1.7 of the 2011 edition);

--- Changed the maximum slope that the bridge erector can adapt to (see 5.1.8, 5.1.8 of the 2011 edition);

--- Added relevant requirements for the design and calculation of bridge erecting machines (see 5.2.1);

--- Added relevant requirements for the beam trolley in the segment assembly bridge erecting machine (see 5.2.2);

--- Added relevant requirements for risk assessment (see 5.2.3);

--- Added relevant requirements for vias (see 5.2.8);

--- Changed the requirements for static load test of segmental assembly bridge erecting machine (see 5.2.15, 5.2.11 of the 2011 edition);

--- Added the requirements for the working brake when the lifting mechanism adopts a hydraulic winch (see 5.2.18);

--- Increased safety factor requirements for safety brakes (see 5.2.21);

--- Changed the requirements for static rigidity of bridge erecting machines (see 5.2.24, 5.2.18 of the 2011 edition);

--- Changed the synchronization requirements for the two beam lifting trolleys, the front beam lifting trolley and the beam transport trolley (see 5.2.25, 5.2.19 of the 2011 edition);

--- Changed the requirements for bolted connections (see 5.3.3, 5.3.3 of the 2011 edition);

--- Added requirements for pin connections of structural members (see 5.3.4);

--- Added requirements for tie rod connections (see 5.3.5);

--- Changed the brake selection requirements (see 5.4.3, 5.4.3 of the 2011 edition);

--- Changed the requirements for pulleys and drums (see 5.4.4, 5.4.4 of the 2011 edition);

--- Changed the installation requirements of brake wheel and brake disc (see 5.5.2, 5.5.2 of the 2011 edition);

--- Added requirements for overload protection devices (see 5.8.2);

--- Added requirements for security monitoring management system (see 5.8.3);

--- Deleted the protection and control requirements (see 5.8.3 of the 2011 edition);

--- Added the requirements for the support of the bridge crane running track (see 5.8.6);

--- Added requirements for the lifting height limit device of the bridge erecting machine (see 5.8.7);

--- Changed the requirements for painting (see 5.9.2, 5.9.2 of the 2011 edition);

--- Deleted the requirements for paint color (see 5.9.4 of the 2011 edition);

--- The test method has been changed (see Chapter 6, Chapter 6 of the 2011 edition);

--- Changed the inspection items table (see Table 16, Table 14 of the 2011 edition);

--- Deleted the requirement of "the packaging, transportation and storage of bridge erecting machines shall comply with GB/T 191" (see 8.2.1 of the 2011 edition);

--- Added requirements for transportation and storage of bridge erecting machines (see 8.2.3, 8.2.4 and 8.2.5).

1 Scope

This document specifies the types and basic parameters, technical requirements, test methods, inspection rules and markings, packaging, transportation and storage of bridge-building machines.

This document is applicable to bridge erection machines used in railway, highway and municipal engineering bridge erection construction. Other bridge erection equipment can be used for reference.

2 Normative references

The contents of the following documents constitute essential clauses of this document through normative references in this document.

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document.

GB/T 27 Hexagonal head reinforcement bolts

GB/T 97.1 Flat washers Grade A

GB/T 700 Carbon structural steel

GB/T 755-2019 Ratings and performance of rotating electrical machines

GB/T 985.1 Recommended grooves for gas welding, arc welding, gas shielded welding and high energy beam welding

GB/T 985.2 Recommended groove for submerged arc welding

GB/T 1231 High-strength large hexagonal bolt connections for steel structures

GB/T 3766 General rules and safety requirements for hydraulic transmission systems and their components

GB/T 3811-2008 Crane design specification

GB/T 4162-2022 Ultrasonic testing method for forged steel bars

GB/T 4208 Enclosure protection grade (IP code)

GB/T 5226.32 Electrical safety of machinery Electrical equipment of machinery Part 32: Technical conditions for lifting machinery

GB/T 5782 Hexagon head bolts

GB/T 5783 Hexagon head bolts with full thread

GB/T 5905.1 Specification for inspection and testing of cranes Part 1: General

GB/T 6067.1-2010 Safety regulations for lifting machinery Part 1: General

GB/T 6170 Type 1 Hexagon Nuts

GB/T 8918 Steel Wire Rope for Important Purposes

GB/T 8923.1-2011 Surface preparation of steel materials before coating - Visual assessment of surface cleanliness - Part 1: Uncoated The rust level and treatment level of the steel surface after the original coating is completely removed

GB/T 9286 Paint and varnish cross-cut test

GB/T 10051 (all parts) Lifting hooks

GB/T 10095 (all parts) Cylindrical gears ISO tooth surface tolerance classification system

GB/T 11352 Carbon steel castings for general engineering

GB/T 12602 Overload protection device for lifting machinery

GB/T 13306 Labels

GB/T 13384 General technical requirements for packaging of electromechanical products