An anti-sliding key-steel pipe pile composite structure and method for repairing collapsed subgrade

Abstract

The invention relates to an anti-slide tie-steel pipe pile composite structure for repairing a cave-in roadbed and a method, which belong to the technical field of constructional engineering. The anti-slide tie-steel pipe pile composite structure for repairing the cave-in roadbed comprises prefabricated anti-slide ties, a prefabricated steel pipe pile and inhaul cables, wherein the prefabricated anti-slide tie is fixed in a stable soil under a cave-in body; the prefabricated steel pipe pile is arranged at the front edge of the cave-in body and fixed in the stable soil body; the inhaul cable is flatly laid in a fill; and two ends of the inhaul cable are respectively fixed on the prefabricated anti-slide tie and the prefabricated steel pipe pile. The anti-slide tie-steel pipe pile composite structure further comprises geogrids, wherein the geogrids and the inhaul cable are simultaneously laid in the fill; and the two ends of the geogrids are respectively fixed on the prefabricated anti-slide tie and the prefabricated steel pipe pile. The invention further provides a method for repairing the cave-in roadbed by using the anti-slide tie-steel pipe pile composite structure. The whole repairing method is simple in the construction process, the road repairing time is saved, and the method is suitable for roadbed cave-in projects which need to be rapidly repaired. The anti-slide tie-steel pipe pile composite structure for repairing the cave-in roadbed exerts a very good anti-slide supporting and retaining effect and can also preferably reduce roadbed settlement due to being provided with the geogrids.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and relates to an anti-skid key-steel pipe pile composite structure and method for repairing collapsed roadbeds. Background technique [0002] In the past 30 years, the construction of highways and railways and other transportation projects in my country has developed rapidly, especially in the western mountainous areas. Subgrade landslide is a relatively common and important disease of traffic engineering. Once the road landslides, it will not only cause poor traffic, but even cause serious loss of life and property. In Southwest China, mountain roads have complex topography and geological conditions, and roadbed collapses often occur. For example, on April 4, 2007, a mountain collapse occurred at 20 meters from Baozhong Bridge at K2095+500 Baozhong Bridge on National Highway G319 in Pengshui County, Chongqing City to the Qianjiang River. , the landslide amounted to about 3,000...

AI Technical Summary

Problems solved by technology

These engineering measures not only take a long time to construct, but also require a long time to solidify for concrete and other materials, which is not conducive to the rapid and smooth road traffic.

Moreover, the construction of anti-slide pile holes and retaining wall foundations requires large-scale excavation, which will greatly disturb the subgrade and easily cause further secondary disasters.

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