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Loess slope ecological protection method

An ecological protection and slope technology, applied in the fields of botanical equipment and methods, excavation, horticulture, etc., to achieve the effect of enhancing overall stability, improving road landscape pattern, and preventing seepage

Active Publication Date: 2013-02-13
江苏绿之源生态建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the outstanding problems of slope protection in the loess area mentioned above, a comprehensive method of shallow consolidation and ecological protection of loess slopes was proposed.

Method used

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  • Loess slope ecological protection method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The loess slope of a road in Gansu Province, the slope of this section is grade 3, the slope height is 8m, and the slope ratio is 1:0.75. The height is 1m, and the rest of the slope is exposed, and a masonry cut-off drainage ditch has been built. Two years after the road was opened to traffic, the weathering and rain erosion of the exposed slope were severe. Due to the impact of catchment water washing and low temperature freezing and thawing, 4 cut-off and drainage ditches were broken and collapsed. The wall is partially suspended and cracked due to the erosion of slope runoff.

[0035] In this example, after manual cleaning of the weathered layer on the slope surface, the original masonry protection facilities were repaired and reinforced, and new water-based polyurethane resin was sprayed on the second and third grade exposed slopes and platforms with a penetration depth of 3 cm to form An anti-seepage consolidation layer with good flexibility, tensile strength and ...

Embodiment 2

[0038] The ecological protection experiment section of a loess slope on an expressway in Ningxia, with a slope area of ​​2700m 2 , Grade 3 slope, slope ratio 1:0.75, platform width 2m. The slope surface is seriously desertified, and it is difficult for people to step on the sand and work uphill.

[0039] The protective steps carried out in this embodiment are as follows ( figure 1 ):

[0040] 1. Excavate and cut the drainage ditch. The intercepting ditch will be excavated at the outer edge of the slope. The section of the intercepting ditch will be a natural curved side ditch with a width of 80cm and a depth of 45cm. The horizontal drainage ditch of the platform is excavated on the inner side of the platform. The cross section of the horizontal drainage ditch is a natural arc side ditch with a width of 60cm and a depth of 30cm. Excavate longitudinal drainage ditches at intervals of 100m on the slope. The section of the longitudinal drainage ditches is a natural curved side...

Embodiment 3

[0050] The ecological protection experiment section of the loess slope of an expressway in Gansu, with a slope area of ​​4000m 2 ,. The slope is severely desertified, the local climate is dry and rainless, and the annual minimum temperature is -20°C.

[0051] The protection steps carried out in this embodiment are as follows:

[0052] 1. Excavate and cut the drainage ditch. The intercepting ditch is excavated on the outer edge of the slope. The section of the intercepting ditch is a natural arc side ditch with a width of 40cm and a depth of 20cm. Excavate the horizontal drainage ditch inside the platform, the cross section of the horizontal drainage ditch is a natural arc side ditch, the ditch width is 40cm, and the ditch depth is 20cm. Excavate longitudinal drainage ditches at intervals of 100m on the slope. The section of the longitudinal drainage ditch is a natural curved side ditch with a width of 30cm and a depth of 20cm.

[0053] 2. Cut off the drainage ditch to form...

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Abstract

The invention provides a loess slope ecological protection method. The loess slope ecological protection method comprises steps as follow. Shallow consolidation of the slope face of the loess slope is performed with waterborne polyurethane. Nets are fixedly arranged on the slope face after the shallow consolidation. Vegetation growing base materials are sprayed on the slope faces after processed by the former step. A seed layer is sprayed on the slope surface sprayed with vegetation growing base materials. Due to the fact that waterborne polyurethane resin is sprayed on the slope face, the loess slope ecological protection method effectively solves the phenomenon that the slope face is loose, and the efflorescence is serious, and the integrated stability of the slope face is enhanced. Due to the fact that intercepting drains are excavated, good anti-leakage and anti-scour effect is achieved. The loess slope has good elasticity and strength, and phenomenon that the slurry masonry intercepting drains are freezing and thawing by low temperature, subside unevenly and break due to factors like runoff washing and the like. The loess slope ecological protection method reconstructs vegetation of the slope and improves road landscape patterns through the green technology of the vegetation base material spraying.

Description

technical field [0001] The invention belongs to the field of soil surface reinforcement, in particular to a reinforcement method for loess slopes. Background technique [0002] China is the country with the widest distribution and largest thickness of loess in the world. The loess landform is mainly distributed in a strip from west to east between 30° and 48° north latitude, covering an area of ​​about 640,000 square kilometers, including Shanxi, Shaanxi, Gansu, etc. The province is a typical loess distribution area, with a wide distribution area and a large thickness. This area not only has a large area of ​​loess, but also has a high salt content in the surface water, and the vegetation is not rich. [0003] Loess has visible large pores and well-developed vertical joints. Whenever the soil layer is soaked or under the influence of gravity, the loess layer itself loses its consolidation properties, often causing strong subsidence and deformation. During the construction ...

Claims

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Application Information

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IPC IPC(8): E02D17/20A01G1/00
Inventor 祁有祥辜再元王京燕
Owner 江苏绿之源生态建设有限公司
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