PTBD (Three-dimensional Combination Reinforcement) technology for treating after-built high and steep fill slope

Abstract

The invention provides a PTBD (Three-dimensional Combination Reinforcement) technology for treating an after-built high and steep fill slope; the technology comprises technical problems in changing, filling and rolling a surface soil in a sectional and layered way, compacting a middle slope to reduce shear strength, arranging a concrete-faced protective slope on a lower slope and so on. For primary causes for particularity and instability of the after-built high and steep fill slope, the three-dimensional combination reinforcement technology of the high and steep fill slope, which is performed by changing, filling and rolling the surface soil in a sectional and layered way, compacting the middle slope and arranging the concrete-faced protective slope on the lower slope from top to bottom, is provided by using atmospheric rainfall critical infiltration depth as a penetration point. The PTBD technology for treating the after-built high and steep fill slope, provided by the invention, has the advantages as follows: as a soil filling area is rolled and compacted in batches in a sectional way, a slope rolling edge effect problem is avoided, the rolling quality is guaranteed, the shear strength is enhanced, and a local stability problem of a whole body of a shallow surface layer and a deep layer is solved; strong targeted property, high reliability and so on are obtained in the technical aspect; and advantages of simple process, short construction period, low manufacturing price and so on are obtained in the construction aspect.

Description

technical field [0001] The present invention relates to a reinforcement technology for post-built high and steep fill slopes. Specifically, it is a bottom-up method using "lower slope compaction + middle slope tree gabion blind well drainage + surface soil division" The three-dimensional combined reinforcement technology (PTBD technology) for joint treatment of post-construction high and steep fill slopes. Background technique [0002] For new construction projects in mountainous and hilly areas, a large number of high and steep fill slopes will be formed to meet the needs of site leveling. Due to the complex material composition and loose structure, the fill slope is prone to instability under the action of unfavorable factors such as atmospheric rainfall and earthquakes, resulting in huge economic losses. [0003] According to the different implementation stages of high and steep fill slope reinforcement, it can be divided into two types: pre-construction and post-constru...

AI Technical Summary

Problems solved by technology

For post-construction high and steep fill slopes, when a single anti-slide retaining measure is used for reinforcement, due to the low strength of the fill itself and poor self-stabilization ability, large-section anti-slide piles or multiple anti-slide piles are often required to meet the design safety standards. row of anti-slide piles, and the soil between the piles is easy to squeeze out, resulting in the failure of the treatment project; when a single anchorage measure is used for reinforcement, due to the low bonding strength between the filling soil and the anchorage body, it is often necessary to...

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