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Featured report / China project / Hunan
The Hunan provincial government reported that the Yongzhou beam yard completed all 451 precast box girders assigned to the yard on September 28, 2026, marking completion of box-girder prefabrication across the Shaoyang-Yongzhou high-speed railway. Hunan Daily's New Hunan report says the line has four beam yards and 1,695 box girders in total.
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Guangzhou Municipal Planning and Natural Resources Bureau posted September 24, 2026 acceptance notices for two factory buildings, identified as D-3 and D-4, under a prefabricated-component production-base project in Zengcheng District. The notices list the applicant as the Changgang Village collective economic organization in Yongning Subdistrict and give the project location as Songziling, Changgang Village.
China Railway Group reported that self-developed intelligent equipment for transporting and erecting PC track beams was put into use on the Huangshan Tourism T1 Line on September 20, 2026. The source says the system supports scaled intelligent beam erection for the line's 4,343 PC track beams on a route with extensive bridge-and-tunnel works.
Lu'an Municipal Transportation Bureau reported that the G529 Jinyue route Yeji section railway-overpass works set the first batch of two precast box girders above the operating Ningxi Railway during a two-hour railway work window on September 9, 2026. The source says the 408-meter bridge is the section's core control work and uses ten 40-meter precast box girders over the railway.
Tongren municipal media published a September 4, 2026 site report on the Guizhou section of the Tongren-Jishou Railway, saying the 2.45-kilometer Baoziying grand bridge had entered superstructure work and had erected 24 of its 76 box girders after a September 3 site visit. The report says crews were using heavy modular transport-and-erection equipment and an intelligent dispatching system to coordinate beam precasting, transport and erection.
The Hunan provincial government published an August 30, 2026 Hunan Daily photo report that bridge-girder erection was under way at the Hu-Kun grand bridge on August 29. The report says China Railway No. 4 Engineering Group has completed all 524 precast box girders for Shaoyong Railway Lot 1 and erected 468 spans, equal to 89.3% of the total.
China Railway Group reported on August 21, 2026 that China Railway No. 2 Engineering Bureau erected the first 32-meter, 134-tonne T beam for the Huangtong-Baise Railway at the Huangtong Bridge site on August 18, marking the start of bridge-girder erection on the line.
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Production in pictures
Read equipment by workflow layer: product route, concrete supply, forming, reinforcement, curing, handling, QC and maintenance.
Read the wall panel line by station sequence: table preparation, reinforcement, embedded parts, concrete delivery, curing, demolding and yard movement.
Pipe equipment must be read through joint geometry, reinforcement cage flow, concrete compaction, curing, handling and leakage/load testing. Supporting visual: concrete pipe gasket as the related product or interface reference for this workflow.
Spun pile production connects pile standard, end plate, cage, prestressing, mold balance, spinning program, steam curing and yard handling. Supporting visual: pile end plate as the related product or interface reference for this workflow.
Automation value comes from data, reinforcement, concrete delivery, pallet movement, curing, QC and maintenance working as one controlled system. Supporting visual: tilting table as the related product or interface reference for this workflow.
Damage reduction should follow the whole chain: first lift, yard support, rack, truck, route, site unloading and repair feedback. Supporting visual: precast lifting anchor as the related product or interface reference for this workflow.
Product reference
Technical articles
Field investigation guide for precast double-tee flange connection cracking, detailing cyclic traffic vibration fatigue mechanics, code commentary, and observation records for engineering review.
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Organize precast yard checks around approved support locations, stack alignment, ground condition and release records without inventing universal dunnage rules.
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Understand why longitudinal shear-key joints between adjacent precast box beams crack and leak, and how bridge owners organize connection investigations.
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Document crack widths, orientation, and strand proximity on delivered precast beams, tees, and panels to assemble an objective receiving package for engineering review.
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Daily and periodic maintenance practices for steel molds, magnetic systems and casting tables.
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Where curing compound fits in precast production and how to avoid surface or coating problems.
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Questions to ask before using early strength admixtures to shorten demolding cycles.
Read technical articleCommon causes of cracks after demolding and the production evidence to inspect first.
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Process controls for dimensions, flatness, openings and embedded part positions.
Read technical articleHandling, lifting, storage and transport checks that reduce chips, cracks and rejected elements.
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Coordinate precast product, erection, and interfacing tolerances before setting panels, with multi-directional adjustments, clearances, and multi-trade registers.
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