世界桥梁
世界橋樑
세계교량
World Bridges
2015年
5期
36-39
,共4页
斜拉桥%索导管%钢内导管%出塔点坐标%锚点坐标%精确定位%施工技术
斜拉橋%索導管%鋼內導管%齣塔點坐標%錨點坐標%精確定位%施工技術
사랍교%색도관%강내도관%출탑점좌표%묘점좌표%정학정위%시공기술
cable-stayed bridge%stay cable guide tube%internal steel guide tube%out-of-pylon point coordinates%anchoring point coordinates%accurate positioning%construction technique
为提高斜拉桥索导管空间定位的精度，进一步推动测量定位技术的实用化，对采用钢内导管装置的斜拉桥索导管精确定位技术进行研究。钢内导管是由一根半圆柱体形状的细长轴（中心线处开有微小V形槽）相连双半圆法兰盘的一种装置，其中一端与半圆法兰盘平齐，另一端穿过半圆法兰盘。斜拉桥索导管定位时，在初步定位的基础上，将钢内导管穿入索导管中，利用钢内导管将出塔点坐标和理论锚点坐标由虚点转化为实点，对索导管进行直接精确复测定位，再利用两坐标点所在空间直线方程对实测点进行判别。将该技术应用于台州市椒江二桥上，实践结果表明该技术能简单快速地实现斜拉桥塔端索导管的精确定位，精度能达到5 mm以内。
為提高斜拉橋索導管空間定位的精度，進一步推動測量定位技術的實用化，對採用鋼內導管裝置的斜拉橋索導管精確定位技術進行研究。鋼內導管是由一根半圓柱體形狀的細長軸（中心線處開有微小V形槽）相連雙半圓法蘭盤的一種裝置，其中一耑與半圓法蘭盤平齊，另一耑穿過半圓法蘭盤。斜拉橋索導管定位時，在初步定位的基礎上，將鋼內導管穿入索導管中，利用鋼內導管將齣塔點坐標和理論錨點坐標由虛點轉化為實點，對索導管進行直接精確複測定位，再利用兩坐標點所在空間直線方程對實測點進行判彆。將該技術應用于檯州市椒江二橋上，實踐結果錶明該技術能簡單快速地實現斜拉橋塔耑索導管的精確定位，精度能達到5 mm以內。
위제고사랍교색도관공간정위적정도，진일보추동측량정위기술적실용화，대채용강내도관장치적사랍교색도관정학정위기술진행연구。강내도관시유일근반원주체형상적세장축（중심선처개유미소V형조）상련쌍반원법란반적일충장치，기중일단여반원법란반평제，령일단천과반원법란반。사랍교색도관정위시，재초보정위적기출상，장강내도관천입색도관중，이용강내도관장출탑점좌표화이론묘점좌표유허점전화위실점，대색도관진행직접정학복측정위，재이용량좌표점소재공간직선방정대실측점진행판별。장해기술응용우태주시초강이교상，실천결과표명해기술능간단쾌속지실현사랍교탑단색도관적정학정위，정도능체도5 mm이내。
To improve the spatial positioning accuracy of stay cable guide tubes of cable‐stayed bridge and further promote the actual implementation of surveying and positioning technique ,the accurate positioning technique for stay cable guide tubes of cable‐stayed bridge using internal steel guide tubes is studied .The main components of the internal steel guide tube involve a slender semi‐cylindrical axle (small V‐shaped notches are cut along the central line of the axle) w hich con‐nects two semi‐circular flanges ,one end of the axle level with the semi‐circular flange and the other end going through the semi‐circular flange .During the positioning of the stay cable guide tubes of cable‐stayed bridge , after preliminary positioning , the internal steel guide tubes are threaded through the stay cable guide tubes ,use the internal steel guide tubes to transform the coordinates of the tube‐out‐of‐pylon points and the coordinates of theoretical anchoring points from imaginary points to actual ones ,carry out direct accurate re‐measuring and positioning for stay cable guide tubes ,and then use the spatial straight line equation of the two coordinate points to judge the actu‐al measuring points .The technique has been used to the Second Jiaojiang River Bridge in Taizhou City .T he engineering practice proves that the technique is able to realize the accurate positioning of the pylon‐end stay cable guide tubes of cable‐stayed bridge in a simple and rapid manner and the accuracy is within 5 mm .
