An energy-dissipating shock-absorbing support structure and construction method

Abstract

An energy-dissipating shock-absorbing support structure and a construction method thereof belong to the field of support engineering. The energy-dissipative shock-absorbing support structure includes anti-slide piles, connecting beams, energy-dissipative shock-absorbing devices and anchor rods; the anti-slide piles are composed of front strong piles on the side of the river valley and rear weak piles on the side of the mountain ; One end of the tie beam is fixed on the top of the front strong pile, and the other end is fixed on the top of the rear weak pile; one end of the energy dissipation shock absorber is connected to the front strong pile, and the other end is connected to the rear weak pile, and it is kept horizontal; One end is driven into the stable soil layer, and the other end is anchored at the top of the post weak pile. The invention has high bearing capacity, reasonable use of space, and under the action of static force, the front strong pile, the rear weak pile and the anchor rod are jointly supported. After the earthquake, the structure resets after the dynamic load disappears, which effectively reduces the damage to the support structure caused by the dynamic load, and provides a new slope support method for earthquake-prone areas.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering support, specifically relates to an energy-dissipating shock-absorbing support structure and construction technology, and is suitable for slope support engineering. Background technique [0002] In recent years, the earth's internal tectonic movement has been frequent and earthquakes have occurred frequently. High and large slopes produce dynamic responses under the action of seismic loads, and are prone to major geological disasters such as collapses and landslides, which pose a huge threat to people's production and life. Under the action of earthquake load, the original structure of the soil is destroyed, and its stability safety factor is greatly reduced. However, the current slope control technology mainly provides greater support reaction force by increasing the stiffness or moment of inertia of the support structure, which is a passive support technology, and the support s...

AI Technical Summary

Problems solved by technology

Under the action of earthquake load, the original structure of the soil is destroyed, and its stability and safety factor are greatly reduced.

However, the current slope control technology mainly provides greater support reaction force by increasing the stiffness or moment of inertia of the support structure, which is a passive support technology, and the support structure cannot actively carry out dynamic loads. Consumption, reducing the damage to the soil structure, resulting in the slope of the existing support structure still frequently unstable under the action of the earthquake, such as the composite structure of a rectangular pile inscribed with a round pile in the patent No. CN 209603150 U, By replacing the upper part of the circular anti-slide pile with a rectangle, while reducing the section of the pile, the bending stiffness and moment of inertia of the supporting pile are increased, and the supporting reaction force is increased.

However, the structure still has certain limitations. The structure has already entered the working state and deformed under the static state. When the dynamic load comes, the deformable range of the structure under stable conditions is limited, and the coordination cannot be satisfied under the dynamic load. Deformation, can not eliminate the adverse effects of dynamic load; and the patent No. CN 110359469 A a kind of shock-absorbing anti-slide pile structure and design method applies dynamic vibration absorber to the anti-slide pile, the structure through the dynamic vibration absorber The earthquake effect buffers the impact of the earthquake on the subgrade, but this structure has certain limitations. The pile structure has entered the working state under the static state. When the earthquake comes, the horizontal displacement between the piles is the same, and after the earthquake disappears Due to the displacement of the structure, the original position cannot be restored, and the structure gradually shows progressive damage under multiple dynamic actions, which greatly reduces its support effect under subsequent static forces.

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