Semi-assembly bamboo-concrete composite bridge

Abstract

The invention discloses a semi-assembly bamboo-concrete composite bridge which comprises longitudinal bamboo beams (1), transverse bamboo beams (2), a bamboo panel (3), a cast-in-place concrete layer (4) and transverse prestress tendons (5), and is characterized in that longitudinal beam notches (11) are formed on the top surfaces of the longitudinal bamboo beams (1) at intervals in the longitudinal direction of the bridge; transverse beam notches (21) are formed on the top surfaces of the transverse bamboo beams (2) at intervals in the transverse direction of the bridge; longitudinal grooves (31) are formed on the top surface of the bamboo panel (3) at intervals in the transverse direction of the bridge; the cast-in-place concrete layer (4) is cast on the tops of the longitudinal bamboo beams (1), the transverse bamboo beams (2) and the bamboo panel (3); metal pieces (7) are arranged in the longitudinal beam notches (11) and the transverse beam notches (21); the thickness h1 of the cast-in-place concrete layer (4) on the top surfaces of the longitudinal bamboo beams is not greater than 1 / 3 of the height h of each longitudinal bamboo beam; the transverse prestress tendons (5) penetrate through the inner parts, the side faces and the bottom surfaces of the transverse bamboo beams (2); and two ends of the transverse prestress tendons are subjected to prestress tension and anchored on the outer side face of the outermost longitudinal bamboo beam (1) in the transverse direction of the bridge. The bridge is great in structural stiffness, good in stretchability, high in assembling degree and good in structural integrity, takes the advantages of multiple materials fully, and meets requirements of a bridge structure on normal use and durability; the materials used are green and environment-friendly; and structural members are standard.

Description

Technical field [0001] The invention relates to a composite structure bridge, in particular to a semi-assembled bamboo-concrete composite bridge, which belongs to the field of civil construction structures. Background technique [0002] Under the current background of developing a low-carbon economy, green, ecological, environmentally friendly, and low-carbon new building structural materials are the inevitable direction of the development of civil engineering technology. The biggest advantage of bamboo is environmental protection and renewable raw materials. The maturity period of bamboo is generally 2 to 4 years (20 years for wood). According to incomplete statistics, the total area of ​​bamboo forests nationwide is about 3.54 million hectares (excluding Taiwan Province), accounting for about 3% of the total forest area, with a stock volume of about 80 million tons and an annual output of about 8 million tons of bamboo. my country's bamboo species and bamboo forest area accoun...

AI Technical Summary

Problems solved by technology

[0005] (1) For the reinforced concrete structure, its self-heavy, construction and maintenance period is long

[0006] (2) For steel structures or steel-concrete composite structures, the main load-bearing part is steel beams, the cost of steel is high, and the corrosion resistance is poor. Corrosion will affect the normal use of the bridge, resulting in high maintenance costs

Compared with other building materials, bamboo has significant advantages in terms of earthquake resistance, environmental protection, comfort, and industrialization, and the current structure made of bamboo has begun to appear in the field of bridge construction, such as Chinese patent "200610031948.9", which discloses a bamboo bridge. Composed of bamboo components, the structure is simple, the construction is convenient, and the construction materials are environmentally friendly. However, for this type of all-bamboo structure bridge, the bamboo consumption is large, the section stiffness is low, and the integrity of the whole bridge is insufficient. Relatively speaking, the composite bridge has obvious advantages. place

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