福州洪塘大桥改建工程岩土勘察评价

Geotechnical Investigation and Evaluation of Reconstruction Project of Hongtang Bridge in Fuzhou City

福州市洪塘大桥改建工程长1 710 m,主桥采用两跨独塔钢箱梁自锚式悬索桥,主跨跨径150 m。工程跨越山麓、河床与冲海积平原等微地貌单元,地形起伏大;场地岩土层成因类型众多,工程地质条件复杂。通过充分收集地质物探资料、地表综合地质调查、钻探、原位测试与室内试验、钻孔波速测试等综合手段,科学评价洪塘大桥改建工程中各分项工程的岩土工程特性,为工程设计提供了可靠翔实的地质依据。

The reconstruction project of Hongtang Bridge in Fuzhou City is 1710 m. The main bridge adopts two-span single-tower steel box girder self-anchored suspension bridge with a main span of 150 m. The project spans the foothills, river beds, and alluvial plains, and other microgeomorphological units. The topography is very undulating. There are many genetic types of geotechnical strata and complex engineering geological conditions. By collecting the data of geological geophysical exploration, surface comprehensive geological investigation, drilling, in-situ test and laboratory test, and borehole wave velocity test, the geotechnical engineering characteristics of each sub-project in the reconstruction project of Hongtang bridge are scientifically evaluated. It provides a reliable geological basis for engineering design.