Supporting and protecting composite anti-slide pile suitable for high-attitude and high-intensity regions

Abstract

A supporting and protecting composite anti-slide pile suitable for high-attitude and high-intensity regions is composed of a pile core and a pile cylinder, wherein the pile cylinder is tightly pasted on the outer side of the pile core. The pile core is composed of a prefabricated prestressed pile, grouting pipes and a center grouting pipe, wherein the cross section of the prefabricated prestressed pile is orthohexagonal. Each side face of the prefabricated prestressed pile is provided with a groove in the axis direction. The grouting pipes are arranged in the grooves. A center grouting hole is formed in the prefabricated prestressed pile in the central axis direction. The center grouting pipe is arranged in the center grouting hole. The pile cylinder is composed of multiple layers of reinforcing steel bar cages and a grouting body. The reinforcing steel bar cage on the innermost layer tightly wraps the pile core, the reinforcing steel bar cage on the outermost layer is tightly attached to the hole wall, and the rest layers of reinforcing steel bar cages are evenly distributed. The reinforcing steel bar cages are wrapped in the grouting body. The concrete strength of the pile core reaches more than 80 MPa, and therefore the defects that the cast-in-place concrete hardening speed is low at a low temperature, and the quality is difficult to ensure are overcome; the tension resistance of the pile is greatly improved due to the prestress of the pile core and the reinforcing steel bar cages of the pile cylinder, and therefore the horizontal bearing capacity is improved, and larger anti-slide force can be provided by the supporting and protecting composite anti-slide pile.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and relates to a composite anti-slide pile suitable for supporting high slopes in areas with high altitude and high intensity. Background technique [0002] In order to speed up the economic development and ethnic exchanges and integration of Tibetan areas, the construction of the Tibet Expressway is very urgent and necessary. The junction area between southwest my country and Tibet is located on the east side of the Qinghai-Tibet Plateau. The landform is characterized by high mountains and canyons, with high slopes and deep valleys, and steep terrain; the air is thin, the ecological environment is fragile, and there are seasonal permafrost effects; moreover, activities There are many faults, frequent earthquakes with high magnitude and high intensity, such as the Diexi earthquake (1933) and the Wenchuan earthquake (2008). Therefore, its terrain, geological conditions, climate and ecolo...

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Problems solved by technology

However, due to the sloping topography of the slope, and the lower stratum is mostly hard soil or rock, it is difficult to use static pressure or driving method for construction

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