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Method for eliminating landslide mass area terrace interflow

A landslide mass and soil flow technology, applied in soil drainage, construction, application, etc., can solve problems such as inability to effectively exclude rainfall infiltration, inappropriate for terrace construction in landslide areas, and increase in the loss of nitrate nitrogen in soil, etc. Technical hurdles, reduced nitrogen loss, easy-to-operate effects

Inactive Publication Date: 2014-07-02
CHONGQING INST OF GEOLOGY & MINERAL RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, underground drainage may increase the loss of nitrate nitrogen in the soil at the same time, resulting in a decrease in drainage water quality, and cannot effectively eliminate rainfall infiltration, so it is completely unsuitable for the construction of terraced fields in landslide areas

Method used

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  • Method for eliminating landslide mass area terrace interflow
  • Method for eliminating landslide mass area terrace interflow
  • Method for eliminating landslide mass area terrace interflow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The method for getting rid of the soil flow in the horizontal clay terraces of the landslide body area includes the following steps,

[0029] a. Dig drainage ditches on the terraced fields, the slope of the drainage ditch is 1:0.3, the depth is 1m, and the bottom width is 20cm;

[0030] b. Lay a layer of clay with a thickness of 20cm in the drainage ditch;

[0031] c. Put a PVC drainage pipe with a diameter of 5cm evenly provided with water seepage holes at 180° (half of the surface) of the surrounding wall into the drainage ditch, and the water seepage holes face upward, and the part without water seepage holes is buried in the clay, and the clay is compacted to drain water. The pipe spacing is 8m, the gradient from the inner end of the drainage ditch to the outer end of the drainage pipe is 0.3%, the diameter of the seepage hole is 0.5cm, and the distance between the seepage holes is 2cm;

[0032] d. Lay a layer of gravel with a thickness of 8cm on the upper half of ...

Embodiment 2

[0037] The method for getting rid of the soil flow in the horizontal loam terraces in the landslide mass area comprises the following steps,

[0038] a. Dig a drainage ditch on the terraced fields, the slope of the drainage ditch is 1:0.3, the depth is 1.2m, and the bottom width is 22cm;

[0039] b. Lay a layer of clay with a thickness of 25cm in the drainage ditch;

[0040] c. Put a 10cm-diameter PVC drainage pipe with water seepage holes evenly on the surrounding wall at 180° (half of the surface) into the drainage ditch, with the water seepage holes facing upward, and bury the part without water seepage holes in the clay, compact the clay, and drain the water The pipe spacing is 12m, the gradient from the inner end of the drainage ditch to the outer end of the drainage pipe is 0.4%, the diameter of the seepage hole is 0.7cm, and the distance between the seepage holes is 3cm;

[0041] d. Lay a layer of gravel with a thickness of 9cm on the upper half of the drainage pipe as...

Embodiment 3

[0046] The method for getting rid of the soil flow in the horizontal sandy soil terrace in the landslide body area includes the following steps,

[0047] a. Dig drainage ditches on the terraced fields, the slope of the drainage ditch is 1:0.3, the depth is 1.1m, and the bottom width is 24cm;

[0048] b. Lay a layer of clay with a thickness of 30cm in the drainage ditch;

[0049] c. Put a PVC drainage pipe with a diameter of 12cm evenly provided with seepage holes at 180° on the surrounding wall (half of the surface) into the drainage ditch, with the seepage holes facing up, and bury the part without seepage holes in the clay, compact the clay, and drain the water The pipe spacing is 18m, the gradient from the inner end of the drainage ditch to the outer end of the drainage pipe is 0.5%, the diameter of the seepage hole is 0.7cm, and the distance between the seepage holes is 4cm;

[0050] d. Lay a layer of gravel with a thickness of 11cm on the upper half of the drainage pipe ...

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Abstract

The invention provides a method for eliminating landslide mass area terrace interflow. The method includes the following steps: a, excavating a drainage ditch on a terrace; b, laying a layer of clay in the drainage ditch; c, placing a drainage pipe with water seepage holes uniformly arranged on the peripheral wall by 180 degrees in the drainage pipe, enabling a face with the water seepage holes to be upward and a portion without the water seepage holes to be buried in the clay, and compacting the clay; d, laying a layer of gravel of 8-13cm in thickness on an upper half of the drainage pipe, and laying geotechnic cloth to wrap the gravel; e, laying a layer of straw and fly ash; f, backfilling soil and hierarchically compacting to be flat; arranging a transverse furrow along a ridge of a previous step of the terrace in each step of the terrace. By the method, surface water seeping in the landslide mass area terrace and interflow formed by the surface water can be effectively eliminated, so that technical obstacles when a landslide area is reclaimed to be a terrace are overcome. The method has the advantages of being low in cost, simple, convenient, high in efficiency, easy in operation and the like, and is convenient for large-scale popularization and use.

Description

technical field [0001] The invention belongs to the field of drainage of terraced fields, and in particular relates to a method for removing soil flow in terraced fields in a landslide body area. Background technique [0002] The construction of terraced fields is a main content of the existing slope farmland consolidation, but the slope stability of the consolidation area does not need to be considered in the conventional slope farmland consolidation, and for the landslide area, since the sliding surface has been formed during the sliding process, The integrity of the slope surface is destroyed, so it is extremely sensitive to changes in the external environment. Therefore, the stability of the slope must be considered in the construction of terraces in the landslide area. Building terraced fields on the landslide body makes the original field surface with a slope smooth and the slope slows down, so that the infiltration intensity of the slope surface under rainfall conditi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B11/00
Inventor 徐洪唐紫晗姚光华邹蜜李妍均鲁嘉濠陈正华
Owner CHONGQING INST OF GEOLOGY & MINERAL RESOURCES
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