Self-pressurization protection device and method for maintaining stability of expansive soil slope

Abstract

The invention relates to the field of slope engineering designs, in particular to self-pressurization protection device and method for maintaining the stability of an expansive soil slope. The self-pressurization protection device comprises a rain water storage tank fixed onto the slope, wherein a water outlet of the water storage tank is connected with an anchor rod through a water delivery pipeline; the anchor rod is in a hollow strip-type tubular shape; a water-stop sheet is arranged in the middle of the inner part of the anchor rod and divides the anchor rod into two chambers, namely, a first chamber and a second chamber; a hollow anchor rod water delivery pipe is arranged in the first chamber; one end of the hollow anchor rod water delivery pipe communicates with the water delivery pipeline; the other end of the hollow anchor rod water delivery pipe is fixed onto the water-stop sheet and penetrates through the water-stop sheet so as to communicate with the second chamber; multiplewater through holes are formed in the outer wall of the second chamber; the anchor rod is inserted into the slope; the water storage tank is located above the anchor rod; and rain water in the waterstorage tank is permeated into a peripheral swelling soil body from the water through holes in the outer wall of the second chamber, swelling soil absorbs water so as to be swelled, and a circumferential extrusion stress is formed on the anchor rod, so that an anchoring force of the anchor rod is improved.

Description

technical field [0001] The invention relates to the field of slope engineering design, in particular to a self-pressurizing protection device and a method thereof for maintaining the stability of expansive soil slopes. Background technique [0002] With the development of social economy, the operation or construction of a large number of roads, railways and water conservancy projects in expansive soil areas, as well as the construction process of urbanization in expansive soil areas, have created a large number of expansive soil slopes. Evaporation and rainfall trigger the dry-wet cycle, and the repeated expansion and contraction of the expansive soil causes criss-cross cracks in the soil, the soil becomes loose, and its strength decreases. In addition, weathering further destroys the integrity of the soil and makes the expansive soil slope Tend to instability, leading to catastrophe. The current engineering protection methods for expansive soil slopes usually adopt the met...

AI Technical Summary

Problems solved by technology

Evaporation and rainfall trigger the dry-wet cycle, and the repeated expansion and contraction of the expansive soil causes criss-cross cracks in the soil, the soil becomes loose, and its strength decreases. In addition, weathering further destroys the integrity of the soil and makes the expansive soil slope Tend to be unstable, leading to catastrophe

The current engineering protection methods for expansive soil slopes usually adopt the method of slope surface lattice combined with soil anchors. The anchoring force of the existing anchors is not strong, making the slope not stable enough

Images