The comprehensive pipe trench of the main road of Chenggong in Kunming City is from Kunming city to Chenggong New District, and the pipe trench passes diagonally through the Kunyu Highway, which has a busy traffic. In order to ensure the normal operation of the Kunyu Highway during the construction period, the project for the first time adopted a two-way tensile steel box culvert pipe trench, under the Kunyu Highway through the new construction technology.