Tower foundation negative-pressure construction method for river channel

Abstract

The invention provides a tower foundation negative-pressure construction method for a river channel. The quality of a tower foundation can be improved, and a tower can be stable and safe in the use process. The method comprises steps as follows: a dam is constructed on the upstream of a place where the river channel is to be constructed for drainage; construction is performed in the place where the river channel is to be constructed in a natural sloping heavy-excavation manner, and a water pump is used for draining river water seeping into a foundation pit to the downstream of the foundation pit in the excavation process; a square die formed by splicing four templates two by two is put in the center of the bottom surface of the foundation pit; the water pump is used for draining the water in the die and discharging the water to the downstream of the foundation pit; high-grade concrete is applied to the inner bottom surface of the die for blocking; a water pumping pipe of the water pump is put in the foundation pit outside the die, so that river water seeping into the foundation pit outside the die can be continuously discharged to the downstream of the foundation pit, and the water pumping port is located in the position 1 / 3-1 / 2 of the height of the die; the concrete is directly cast into the die after a steel reinforcement cage is put into the die and vibrated with a vibrator; the concrete is cured.

Description

technical field [0001] The invention relates to a negative pressure construction method for a pole tower foundation used in a river course. Background technique [0002] When the power sector transmits power lines across the river, especially when the river is wide, some towers are inevitably built in the river. When constructing the tower foundation in the river channel, the foundation pit should be dug out in the river channel, and a mold should be put into the foundation pit, and the river water in the mold should be drained and concrete should be poured into the mold. Due to the loose sand and soil in the river, the concrete mortar in the mold will leak into the foundation pit outside the mold through the sand and soil below the mold, resulting in poor foundation quality of the tower, and the tower is easy to fall and unsafe during use. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a negative pressure...

AI Technical Summary

Problems solved by technology

Due to the loose sand and soil in the river, the concrete mortar in the mold will leak into the foundation pit outside the mold through the sand and soil under the mold, resulting in poor foundation quality of the tower, and the tower is easy to fall and unsafe during use.

Images