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Pre-casting and mounting method for super-high performance concrete deck type slab arch bridge segments

An ultra-high-performance, prefabricated installation technology, applied in bridges, bridge materials, bridge construction, etc., to achieve convenient transportation and installation, reduce steel consumption, and improve earthquake resistance

Active Publication Date: 2018-06-19
GUANGXI ROAD & BRIDGE ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no supporting method for prefabricating ultra-high performance concrete arch rib segments with machine-made sand and for arch bridge installation

Method used

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  • Pre-casting and mounting method for super-high performance concrete deck type slab arch bridge segments
  • Pre-casting and mounting method for super-high performance concrete deck type slab arch bridge segments
  • Pre-casting and mounting method for super-high performance concrete deck type slab arch bridge segments

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Embodiment Construction

[0037] The invention discloses a method for prefabricating and installing sections of an ultra-high-performance concrete slab-arch bridge, which comprises the following steps:

[0038] (1) The sections of the top-supported slab-arch bridge are made of ultra-high-performance concrete. The ultra-high-performance concrete can be made of quartz sand, quartz powder, or natural sand as fine aggregate, and machine-made sand can also be used. If machine-made sand is used to prepare ultra-high performance concrete, special attention must be paid. The raw materials for preparation can be machine-made sand, steel fiber, cement, water, silica fume, and water reducing agent. The fresh parent rock mechanism of widely distributed limestone is selected, the mass ratio of mud block content of machine-made sand is ≤ 0.5%, the MB value of the methylene blue test of machine-made sand is <1.4 and the mass percentage of stone powder content is ≤7.0%, and the single-stage machine-made sand is the lar...

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Abstract

The invention provides a pre-casting and mounting method for super-high performance concrete deck type slab arch bridge segments, and belongs to the technical field of bridge construction methods. According to the pre-casting and mounting method for the super-high performance concrete deck type slab arch bridge segments, each of the slab arch segments of the deck type slab arch bridge is pre-casted by using the super-high performance concrete. Plush coppers are arranged on a joint between the two ends of the slab arch segments in a matched and abut-joint mode, and grooves are formed in the joint between the two ends of the slab arch segments in a matched and abut-joint mode. Tensioning cable channels and grooves are formed in the inner portions of the two ends of the slab arch segments. The slab arch segments are hoisted by a hoisting device to the own positions, the abut-joint plush coppers and grooves of the two adjacent slab arch segments are abut-joint with each other, and tensioning cables are installed in channels in a penetrating mode and are fixed in the grooves in a tensioning mode. Tensioning pintle cables and guy-cables are arranged on the slab arch segments to adjust elevation and arch axes of the slab arch segments, and an arch ring is formed by the splicing of the slab arch segments in sequence. Spandrel columns and bent caps are arranged, so that the ancillary works of the slab arch bridge are completed, and the construction is completed. According to the pre-casting and mounting method for the super-high performance concrete deck type slab arch bridge segments, the speed and quality of the construction can be improved, the cost of the super-high performance concrete arch bridge is reduced, and a thinner and more attractive bridge shape is generated.

Description

technical field [0001] The invention belongs to the technical field of bridge construction methods, and relates to a segmental prefabrication and installation method of an ultra-high-performance concrete slab-arch bridge. Background technique [0002] Ultra-high performance concrete is considered to be the most innovative cement-based engineering material in the past 30 years. It is a cement-based composite material with high strength, high ductility, high durability and high environmental protection. Its ultra-high performance includes excellent mechanical properties (compressive, tensile) and durable performance. [0003] In the beam structure mainly subject to bending, the self-weight of the ultra-high performance concrete beam structure can be effectively reduced, and the ratio of its dead and live load is about 5 / 9 of that of the PC beam bridge, so the spanning capacity of the bridge can be greatly improved. However, the advantages of ultra-high compressive strength of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D21/10C04B28/00
CPCC04B28/00E01D21/00E01D21/105E01D2101/262E01D2101/28C04B14/06C04B14/48C04B18/146C04B2103/302
Inventor 韩玉凌忠秦大燕陈宝春王建军苏家战严胜杰黄卿维关敬文杨建蒙立和李彩霞钱海洋
Owner GUANGXI ROAD & BRIDGE ENG GRP CO LTD
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