|Table of Contents|

Deformation Analysis of Cutting Slope During Expansion Excavation(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2019年05期
Page:
89-96
Research Field:
Publishing date:

Info

Title:
Deformation Analysis of Cutting Slope During Expansion Excavation
Author(s):
LI Jie1;  CHEN Long-long2;  WANG Zhi-feng2
(1. Shaanxi Communication Technology Consulting Co., Ltd., Xi'an 710068, Shaanxi, China; 2. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China)
Keywords:
slope engineering;  deformation stability;  field monitoring;  weak structural plane;  deep horizontal displacement
PACS:
TU433
DOI:
-
Abstract:
In order to study the deformation stability of rock slope during the excavation of cutting slope, and ensure the safety of cutting slope construction and operation period, based on the development of cutting slope, the deformation law of slope excavation was analyzed by surface deformation and internal displacement monitoring data of rock mass. The surface deformation of the slope was monitored by setting observation points, and the deep displacement of the slope was monitored by installing multi-point deflection gauges and inclinometer tubes. Therefore, the relationship between slope excavation and deformation was obtained. The analysis results show that the slope is stable before excavation, and the displacement along the slope is gradually increased with the increase of the slope excavation. After the excavation, the displacement of each slope tends to converge, and the maximum cumulative displacement in the surface monitoring point is 12.30 mm, which is along the parallel road direction, and the vertical maximum cumulative displacement is 10.60 mm, which occurs in the third step. The maximum horizontal displacement of the rock in the slope is 11.02 mm, which mainly occurs in the weak structural plane of the rock boundary. During the excavation of the weak rock slope, the slope rock mass is prone to relatively large displacement deformation. After the excavation, the slope surface displacement tends to converge in a short time, and the displacement of the deep rock mass is basically stable. In the process of slope excavation, the surface displacement and deep horizontal displacement of the slope vary greatly during the excavation of the second stage slope. The reasonable excavation of the rock mass of the second stage slope is the key to control the stability of the whole slope.

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Last Update: 2019-09-29