SLAB-TYPE BOX GIRDER OF A VARYING LONGITUDINAL SECTION MADE BY PRESTRESSED PRECAST CONCRETE AND METHOD CONSTRUCTING THE BRIDGE THEREWITH

PURPOSE: A variable cross-sectional precast concrete hollow slab type transversely-connecting box girder and a bridge construction method using the same are provided to reduce the weight of a slab as much as the section with a variable cross section, and to arrange and extend a pre-stressed concrete...

Full description

Saved in:
Bibliographic Details
Main Author WI, YOUNG MIN
Format Patent
LanguageEnglish
Korean
Published 22.07.2013
Subjects
ASSEMBLY OF BRIDGES
CONSTRUCTION OF BRIDGES
CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
FIXED CONSTRUCTIONS
OR VIADUCTS
Online AccessGet full text

Cover

More Information
Summary:PURPOSE: A variable cross-sectional precast concrete hollow slab type transversely-connecting box girder and a bridge construction method using the same are provided to reduce the weight of a slab as much as the section with a variable cross section, and to arrange and extend a pre-stressed concrete (PC) steel wire along the variable cross section which is reduced in the section with the variable cross section. CONSTITUTION: A variable cross-sectional precast concrete hollow slab type transverse connection box girder has 20-50 m of a span which is applied to a simple beam structure, and comprises a lateral upper side, a cross-sectional section, and a central section. Anchor bolts are protruded from the lateral plane of the upper side in the length direction. Arrangement holes of a pre-stressed concrete steel wire are formed along the inclined surface of a variable cross section and the lateral plane of the center part in a variable cross-sectional section and a central section. A settling unit is formed on the entrance where the arrangement holes and both ends of the girder are met. [Reference numerals] (AA) End; (BB) Cross-section changing part; (CC) Center part; (DD) Variable cross-sectional box girder; (EE) Bottom platform of an abutment or pier 단순보 구조형태의 지간 20~50m에 적용되는 본 발명의 하천횡단용 변단면 프리캐스트 콘크리트 중공 슬래브(slab)형 횡방향 연결 박스 거더는 종래의 상ㆍ하부 플랜지를 갖는 "I"형강 거더 와는 달리 구조적으로 전혀 불리해지지 않으면서 변단면의 형성이 용이할 뿐만 아니라 양단 교량받침부에서 중앙부를 향하여 경사각 3°~8°를 이루는 변단면 구간과, 그리고 거더 형고가 동일한 중앙부 구간으로 이루어지고, 변단면 구간에서 박스형상의 원형을 그대로 유지하면서 도로교설계기준의 규정을 충족하는 거더밑 공간의 높이 30~40㎝의 확보가 용이하면서 변단면 구간만큼 거더 자중이 경감될 뿐 아니라 변단면 구간의 단면감소에 따른 pc강선의 보강, 즉 변단면을 따라 pc강선의 배치 및 단부의 정착면적이 충분하게 이루어짐으로써 본 발명 하천횡단용 변단면 프리캐스트 콘크리트 중공 슬래브(slab)형 횡방향 연결 박스 거더의 구조 역학적 설계가 경제적이면서 취급 및 시공이 용이하도록 한 발명이다.
Bibliography:Application Number: KR20130003673