A geogrid reinforced overlay wall structure and construction method

Abstract

The invention discloses a geogrid reinforcement covering wall structure and a construction method thereof. The geogrid reinforcement covering wall structure is a covering wall structure which is jointly composed of a reinforced soil system, a slop face plant growing layer (3) and a slop surface drainage structure (4), wherein the reinforced soil system is composed of a reinforced soil inner layer section (14) and a covering wall outer layer section (15) with the capillary blocking function. According to the geogrid reinforcement covering wall structure, the characteristics such as a characteristic between a coarse-grained soil layer and a fine-grained soil layer, the coarse-grained soil drainage function, the geotextile water proof function and the geogrid reinforcement function are utilized comprehensively; the geogrid reinforcement covering wall structure has the remarkable advantages of being low in cost, easy to construct, high in water proof efficiency and drainage efficiency, good in environmental protection property and the like, in particular suitable for protecting and managing the situation that gradual sliding slops of cutting slop shallow layers of a weathered zone with coal measure stratum such as thick-layer weathered carbon mudstone and macker are destroyed.

Description

technical field [0001] The invention relates to a comprehensive protective structure for excavating slope shallow layer water damage, in particular to a cutting slope capable of preventing weathering of carbonaceous mudstone, carbonaceous shale and other coal measure strata induced by water damage Geogrid-reinforced cover wall structures for shallow progressive landslides. Background technique [0002] The coal-measure strata in southern my country are mostly carbonaceous mudstone and carbonaceous shale formed in the Mesozoic Era. The regolith of this type of rock has typical unfavorable engineering characteristics such as dry exfoliation, wet disintegration, and mudification. After long-term weathering and denudation, coal-measure strata can often form residual soil layers with a thickness of 2 m to 6 m and strongly weathered rock layers with a thickness of 1 m to 3 m on the shallow surface of natural slopes. [0003] The residual soil formed by weathering of coal measure ...

AI Technical Summary

Problems solved by technology

These methods are often difficult to effectively prevent shallow progressive landslides in this type of coal-measure strata due to their lack of pertinence.

Combined prevention and control measures such as vegetation protection + retaining wall, fully enclosed masonry rubble + retaining wall are low in cost and widely used in engineering. However, due to the small depth of prevention and control, it is often impossible to prevent the excavation of weathered carbonaceous rocks and coal-measure strata. Measures for shallow landslides on slopes; combined prevention and control measures such as anchor lattice beams + vegetation protection, pile-slab walls + vegetation protection are often used in excavation slope protection projects, but the engineering cost is often high and the construction is difficult. And sometimes it will fail, and it is impossible to control the slope that has been damaged by the landslide; the geogrid reinforced soil structure can effectively control this type of landslide, but due to the need to remove the landslide body on the slope surface and use sandy soil as filler, so , not only the cost of the project is high, but also the borrowed soil and spoiled soil will bring about adverse effects on the environment such as water and soil loss

Images