Calculation of Non-uniform Deformation of Segmented Pipe Gallery under Silt Soil Base

Aiming at the settlement and deformation problem of segmental pipe gallery under lock loading, based on the theory of Winkler elastic foundation beam, a pipe gallery settlement analysis model is established, and the deformation law of long pipe gallery structure on silt ground is analyzed by combining with the simulation model of "pipe culvert + natural foundation", so as to put forward a correction model for the calculation of uneven settlement of segmental pipe culvert. The results shows that: Under the action of uneven load, the loaded box body of pipe culvert experiences the most settlement, and the neighboring boxes produce uneven settlement, causing the settlement difference of the structural joints of the box body. The settlement amount and the settlement difference increase with the increase of uneven load. The pipe culvert settlement analysis model based on elastic foundation beam can only be used for elastic foundation, and the modified pipe culvert uneven settlement analysis model can evaluate the pipe culvert settlement and the settlement difference of structural joints under the large deformation pulverized ground foundation; Combined with the control indexes of pipe culvert settlement in coastal pulverized ground foundation, the permissible load of the pipe culvert overlay load is determined. The overlying load of pipe culvert should not be greater than 65.4 kPa, and the uneven load between pipe culverts should not be greater than 59.6 kPa. The results can provide technical support for the settlement prediction and safety control of thin pipe culverts in soft soil areas.