A Construction Method of Variable Stiffness Seismic Support System Applicable to Complicated Slopes

Abstract

The invention discloses a construction method of a variable stiffness antiseismic support system suitable for complex slopes. The variable stiffness antiseismic support system includes a concrete support structure and an antiseismic anchor; the concrete support structure includes rigid concrete and flexible concrete support Structure; anti-seismic anchor includes anchor section, free section and anchor head. The construction method is divided into the following six steps: 1. slope repair; 2. lofting; 3. bolt construction; 4. retaining structure construction; stress applied. The invention effectively solves the problems that under the action of an earthquake, the traditional anchor bolt does not have the anti-seismic performance, the retaining structure is prone to brittle failure, and the support system with a single stiffness cannot meet the anti-seismic requirements of the slope. The construction method of the slope support system with excellent performance, graded earthquake resistance for complex slopes, and recoverable anchor bolts after disasters has broad application prospects and significant economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of side slope reinforcement, and in particular relates to a construction method of a variable stiffness seismic support system suitable for complex side slopes. Background technique [0002] Earthquakes are one of the important factors that cause slope instability and damage. In recent years, relatively strong earthquakes in my country, such as the Wenchuan earthquake and the Ya'an earthquake, have caused a large number of geological disasters such as slope collapse and landslides. According to the survey, some of the buckling slopes are reinforced slopes, but they still cannot withstand the action of earthquakes, and landslides occur. [0003] The main reasons for the instability of reinforced slopes are as follows: 1. The anchoring structure does not have seismic performance, and the anchoring structures such as bolts and soil nails are easily pulled out or broken under the action of earthquake loads; 2. S...

AI Technical Summary

Problems solved by technology

According to the survey, some of the unstable slopes are reinforced slopes, but they are still unable to withstand the earthquake, and landslides occur

[0003] The main reasons for the instability of the reinforced slope are as follows: 1. The anchoring structure does not have seismic performance, and anchoring structures such as anchor rods and soil nails are easily pulled out or broken under seismic loads; 2. Supporting retaining walls Brittle failure, the traditional support is currently rigid concrete retaining walls such as slab-rib and lattice structures, which are prone to damage when earthquakes strike

3. The stiffness design of the existing support system is unreasonable. The dynamic amplification effect of high and large slopes cannot be ignored. The impact of earthquakes on different positions of the slope is different. A support system with a single stiffness is difficult to meet the seismic requirements of the slope.

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