Technical disclosure of formwork construction of super large bridge cushion cap

Uploaded on: 2020-05-04 09:08:11 come from: electrical engineering / Electrical construction design / Construction disclosure

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Precast concrete cushion blocks used to ensure the reinforcement is fixed in the normal position shall be made as small as possible according to their purpose, and their shape and size shall be acceptable to the supervising engineer. At the same time, it shall be designed so that it will not topple when pouring concrete. When concrete cover cushion blocks are used, the maximum aggregate size is 10 mm, the strength should be the same as that of adjacent concrete, and 1.6 mm diameter soft annealed iron wire should be embedded in the cushion blocks for binding with steel bars.

Technical disclosure for construction of super large bridge cushion cap formwork - Figure 1

Technical disclosure for construction of super large bridge cushion cap formwork - Figure 2

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Topic: Key points of super large bridge construction Construction Scheme for Demolition of Super Major Bridge Model construction scheme for super large bridge
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Test construction of cushion cap technology of newly-built railway bridge
There are 2 single track super large bridges 2489.18m long, 8 major bridges 1989.68m long and 2 medium bridges 133.08m long in this section. There are 12 bridges in total, with a total length of 4.407km, accounting for 20% of the length of this section, and 146 cushion caps.

Topic: Key points of super large bridge construction Model construction scheme for super large bridge Construction Scheme of Municipal Extra Large Bridge
Summary of construction technology of cantilever grouting beam of the main bridge of Beijing Hangzhou Grand Canal Bridge
This document is a summary of the construction technology of the cantilever beam of the main bridge of the Beijing Hangzhou Canal Grand Bridge. The construction sequence of the cantilever beam is: cast-in-situ support erection, cantilever casting of hanging basket, cast-in-situ full support cast-in-situ side span section, and closing of side span. The content is detailed and worth downloading.

Topic: Construction Scheme of Canal Project Main contents of construction technical measures Key points of super large bridge construction
Construction technical scheme of continuous rigid frame cantilever grouting section of Wujiang River Bridge
Overall structure: the left 12~13 # piers and the right 8~9 # piers of Wujiang Super Major Bridge are 116 ＋ 220 ＋ 116m cantilever cast-in-situ continuous box girders with a total length of 452m, which are straight web elevated double track single box single room cantilever cast-in-situ box girders. The whole bridge is divided into 119 beam sections, with the length of 0 # beam section at the central fulcrum of 18m. Generally, the length of the beam section is divided into 3m, 3.5m and 4.3m. The length of the side and middle span closure sections is 2m, and the length of the side span cast-in-situ section is 5m, The maximum weight of cantilever pouring block is 2758.670KN.

Topic: Key points of super large bridge construction Model construction scheme for super large bridge Construction Scheme for Demolition of Super Major Bridge
Construction Technology for Linear Monitoring of Continuous Girder of Jinqinggang Super Large Bridge
Jinqinggang Super Major Bridge is located in the section between Jiaojiang Second Bridge in the south of Provincial Highway 75 and Wenling Songmen Wenling, with a total length of 1233m. The 26~29 sections cross the existing river channel. The superstructure adopts 60m ＋ 100m ＋ 60m three span and one connected prestressed concrete continuous box girder with variable cross-section. The bridge is divided into left and right sections.

Topic: Key points of super large bridge construction Model construction scheme for super large bridge Construction Scheme for Demolition of Super Major Bridge
Research on Construction Technology of 86-8m Continuous Frame of Super Large High speed Railway Bridge
Data Catalog 1, Preface 2, Construction Method Features 3, Scope of Application 4, Process Principle 5, Construction Process Flow and Operation Key Points Browse Detailed Catalog>>Content Introduction Construction Method Features: Through channel steel straps are used to solve the problem of high clearance, large-span wall stiffness and flatness that is difficult to control. Flow construction organization method is used to solve the problem of construction period pressure. Optimize the construction process of continuous frame bridge to improve the construction efficiency and quality. The apparent quality of the framework can be improved by using the methods of apparent quality assessment and listing for excellence. The safety standard supports and ladders provide safety guarantee for high-altitude operation. Scope of application: construction of high-speed railway continuous frame structure bridge. Construction process: construction preparation → bored pile construction → cushion cap construction → binding of bottom slab reinforcement → installation of bottom slab formwork → pouring of bottom slab concrete → curing of bottom slab concrete → binding of side wall reinforcement → installation of side wall and top slab formwork → binding of top slab reinforcement → pouring of side wall and top slab concrete → curing of side wall and top slab concrete → construction of bridge deck system 17 pages in total, prepared in 2008

Topic: Key points of super large bridge construction Model construction scheme for super large bridge Construction Scheme for Demolition of Super Major Bridge
Construction technology of cushion cap disclose (Basic part)
The cushion cap was constructed in October to November, and the flood season of Qingyi River has passed, so the construction is still difficult. The bottom elevations of 10 # and 11 # cushion caps are 1.5m and -4.0m respectively. The excavation depth of foundation pit is 6.7m for 10 # pier and 13.3m for 11 # pier. Among them, 10 # pier is close to the river embankment on the north bank, and 11 # pier is a deep foundation pit. During construction, the expected water level elevation is about 5m, and steel sheet pile cofferdam excavation is adopted through scheme comparison.

Topic: Technical disclosure of foundation cushion cap construction Technical disclosure of cushion cap construction of first-class highway Technical disclosure of cushion cap concrete pouring construction
Comprehensive construction of Yongding River Bridge disclose
1. Living area ground: indoor brick laying and mortar plastering; Pave crushed stone chips outside for rolling. 2. The wall between the living area and the working area is 2m high (brick wall). 3. The grade of all hardened concrete in the working area is C20, and the thickness is 15cm for the road, 5cm for the reinforcement cage flow operation area, 5cm for the reinforcement processing area, 10cm for the raw material storage area, and 15cm for the machinery parking area.

Topic: Key points of super large bridge construction Capping beam construction disclosure Safety construction disclosure
Formwork construction technology for straight section of prestressed concrete continuous beam of approach bridge of Dongting Lake Bridge on Menghua Railway disclose book
Construction procedures and processes, operation standards, prevention of inertial accidents, strengthening technology and management disclosure rigid requirements

Topic: Technical disclosure of concrete construction Key points of super large bridge construction Winter construction of cement concrete for Guanhe Bridge