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发明公开
CN101806220A 既有高速铁路隧道接长明洞构造 无效 - 撤回

既有高速铁路隧道接长明洞构造
摘要：
本发明公开了一种既有高速铁路隧道接长明洞构造，旨在提高安全性和施工效率，并有效地避免对铁路运营的干扰。接长明洞构造对接于既有隧道洞口外，包括：两侧基础构造；安装固定在两侧基础构造上的拱型型钢钢架(20)；安装固定在拱型型钢钢架(20)内弧面上的钢筋混凝土纤维板(30)；沿型钢钢架(20)浇筑的钢筋混凝土拱部(40)。本发明以封闭拱型型钢钢架内弧面的钢筋混凝土纤维板作为明洞钢筋混凝土拱部浇筑施工的内模，同时可作为明洞结构的一部分，避免了混凝土施工前立内模及施工完成后拆除内模的麻烦，因此施工周期短，安全性好；预制拱型型钢钢架通过吊装就位，能在确保安全性的前提下，大幅度地提高施工进程。
摘要（英）：

The invention discloses a structure extending an open tunnel for an existing rapid transit railway tunnel, which aims to improve safety and construction efficiency and effectively avoid interference on railway operation. The structure extending the open tunnel is in butt joint outside the portal of the existing tunnel, which comprises two lateral foundation structures, arched formed steel frames (20) fixed on the two lateral foundation structures, reinforced concrete fiberboards fixed on concave surfaces of the arched formed steel frames (20), and reinforced concrete arch parts (40) poured along the formed steel frames (20). In the structure, the reinforced concrete fiberboards closing the concave surfaces of the arched formed steel frames can be used as an inner mold for pouring construction of the reinforced concrete arch parts of the open tunnel, and can also be used as a part of the open tunnel structure so as to solve the problems of erecting the inner mold before concrete construction and detaching the inner mold after construction is completed, so that the structure has short construction period and good safety; and the prefabricated arched formed steel frames can greatly improve the construction process by hoisting on the premise of ensuring the safety.

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