CN-122013798-A - Construction method of high-steep rock slope

CN122013798ACN 122013798 ACN122013798 ACN 122013798ACN-122013798-A

Abstract

The application relates to a construction method of a high and steep rock slope, which comprises the following steps of carrying out numerical simulation analysis on a high and steep rock slope multistage multi-procedure parallel construction process, determining a high and steep rock slope multistage multi-procedure synchronous parallel construction method according to a data simulation analysis result, and carrying out slope excavation construction, anchor cable installation construction, frame beam construction and anchor cable tensioning and anchor sealing construction on the high and steep rock slope according to the multistage multi-procedure synchronous parallel construction method determined by the simulation analysis result until the high and steep rock slope is constructed. The numerical simulation analysis is carried out on the multistage multi-procedure parallel construction process of the high and steep rock slope, the multistage multi-procedure synchronous parallel construction method is determined according to the simulation analysis result, the multistage synchronous construction of different procedures is carried out on the high and steep rock slope, the working face is increased, the construction work efficiency is improved, and the technical problems that the side slope construction is carried out according to the first excavation stage and the first protection stage in the related technology, the side slope construction working face is few, and the construction work efficiency is low are solved.

Inventors

HU XIONGWEI
LU YONG
HUANG WANGMING
WU HE
ZHANG QI
WU LEI
Chen Nianbo
TANG SHENG
LIU XU
ZHOU YANHONG

Assignees

中铁大桥局集团有限公司
中铁大桥局集团第六工程有限公司

Dates

Publication Date: 20260512
Application Date: 20260323

Claims (10)

1. The construction method of the high and steep rock slope is characterized by comprising the following steps of: Performing numerical simulation analysis on the multistage multi-procedure parallel construction process of the high and steep rock slope, and determining a multistage multi-procedure synchronous parallel construction method of the high and steep rock slope according to the data simulation analysis result; and carrying out side slope excavation construction, anchor cable installation construction, frame beam construction, anchor cable tensioning and anchor sealing construction on the high and steep rock side slope according to the multistage multi-procedure synchronous parallel construction method determined by the simulation analysis result until the high and steep rock side slope is constructed.
2. The construction method of claim 1, wherein the multistage multi-process synchronous parallel construction method for performing side slope excavation construction, anchor cable installation construction, frame beam construction and anchor cable tensioning and anchor sealing construction on the high steep rock side slope according to the simulation analysis result comprises the following steps: After pouring of the Nth-level slope protection frame beam is completed, transversely partitioning the Nth-level slope, and simultaneously carrying out anchor cable initial tensioning, anchor cable final tensioning and anchor sealing construction on different transverse areas of the Nth-level slope in a pipeline; After the installation of the N+1st-stage slope protection anchor cable is completed, transversely partitioning the N+1st-stage slope, and carrying out slope frame beam reinforcement binding, template installation and reinforcement, concrete pouring and maintenance construction on different transverse areas of the N+1st-stage slope in a pipeline; After finishing the protection slope surface of the N+2-level slope, transversely partitioning the N+2-level slope, and carrying out anchor rope hole drilling, anchor rope manufacturing and installation construction on different transverse areas of the N+2-level slope in a pipeline manner; Transversely partitioning the N+3-level slope, and carrying out slope blasting, slag discharging and slope finishing construction in different transverse areas of the N+3-level slope in a pipeline manner; and carrying out the next working procedure on the high and steep rock slope from top to bottom in different slope pipelines until the construction is completed.
3. The construction method according to claim 2, wherein the multistage multi-process synchronous parallel construction method determined according to the simulation analysis result performs slope excavation construction, anchor cable installation construction, frame beam construction and anchor cable tensioning and anchor sealing construction on the high steep rock slope, further comprising the steps of: and carrying out slope excavation construction, anchor cable installation construction, frame beam construction and anchor cable tensioning and sealing construction on each level of slope assembly line.
4. The construction method as set forth in claim 2, wherein the steep rocky side slope is subjected to the next process in different steps of the side slope assembly line from top to bottom until the construction is completed, further comprising the steps of: Carrying out anchor cable initial tensioning, anchor cable final tensioning and anchor sealing construction on the same area of the N-level slope in the transverse direction; Carrying out slope frame beam reinforcement binding, template installation and reinforcement, concrete pouring and maintenance construction in the same area of the N+1st-level slope in the transverse direction; Carrying out anchor rope hole drilling, anchor rope manufacturing and installation construction on the same pipeline in the transverse area of the N+2th-stage slope; And carrying out slope blasting, slag discharging and slope finishing construction on the same pipeline in the transverse area of the N+3-level slope.
5. The method of construction of claim 2, wherein the anchor line pre-tensioning, final tensioning and closing construction comprises the steps of: And pre-tensioning the anchor cable, then carrying out graded tensioning on the anchor cable, then carrying out final tensioning on the anchor cable, and finally pouring the anchor sealing end of the anchor cable.
6. The construction method of claim 1, wherein the numerical simulation analysis of the multi-step parallel construction process of the high steep rocky side slope comprises the following steps: Three-dimensional calculation is carried out on the whole high-steep rock slope, and the initial analysis of the overall stability of the slope is carried out; quantitatively analyzing the stability of the high and steep rock slope, and analyzing the local stability of the slope steps after the high and steep rock slope is excavated; And constructing a two-dimensional excavation model of the side slope, and carrying out real excavation simulation analysis.
7. The construction method as set forth in claim 6, wherein the three-dimensional calculation of the entire high steep rock slope and the preliminary analysis of the overall stability of the slope comprise the steps of: and according to the geometric form and the occurrence of the high and steep rock slope, carrying out three-dimensional calculation on the high and steep rock slope by utilizing FLAC software, and carrying out qualitative analysis on the overall stability of the slope.
8. The construction method of claim 6, wherein the quantitative analysis of the stability of the high and steep rock slope and the local stability analysis of the slope steps after the excavation of the high and steep rock slope comprise the steps of: And performing joint cutting on the side slope by using a discrete element analysis method, calculating the safety coefficients of all points on the structural surface by using the point safety coefficients, quantitatively analyzing the stability of the side slope, searching for local instability blocks of the side slope steps excavated by the high and steep rock side slope by using a block stability searching method, and performing local stability analysis on the possible instability blocks.
9. The construction method according to claim 6, wherein the construction of the two-dimensional excavation model of the side slope, and the actual excavation simulation analysis, comprises the steps of: And constructing a side slope two-dimensional excavation model by utilizing FLAC software, adding anchor cables into the side slope two-dimensional excavation model, respectively carrying out numerical simulation analysis on primary construction of excavation primary protection and multi-stage parallel construction of multi-stage side slopes, providing displacement and plastic distribution diagrams under different construction schemes, and comparing the influence of different construction schemes on the stability of the side slopes.
10. The construction method according to claim 1, further comprising the steps of: and installing a monitoring system in the range of the side slope, and sending an alarm signal by the monitoring system when the monitoring data of the monitoring system reach the deformation early-warning value.

Description

Construction method of high-steep rock slope Technical Field The application relates to the technical field of roadbed construction, in particular to a construction method of a high-steep rocky slope. Background At present, the mountain area rock slope is large in height, steep in terrain and large in scale, the design height of a single-stage slope is 10-20 m, the total height of a single multi-stage slope can reach more than hundred meters, the number of high-steep slope stages is large, the transverse dimension is large, particularly, the high-steep rock slope in the deep gorge area is large in engineering quantity, such as main engineering of a tunnel anchor portal, a bridge abutment foundation, a main pier foundation, a two-bank wiring tunnel portal and the like of a bridge, and the excavation blasting and the protection construction of the slope need to be combined with the field condition fine arrangement of the slope. In the related art, the construction of the side slope is carried out according to the principles of first-stage excavation and first-stage protection, the construction method has relatively small deflection on the side slope, the stability of the side slope in the construction process is good, and the safety of the side slope construction is high, but due to the fact that the working procedures of the side slope construction are more, when the first-stage side slope excavation construction is carried out, the working procedures of side slope frame beam templates, the reinforcing steel working procedures, the anchor rope working procedures, the concrete working procedures and the like have the construction phenomenon, and when the side slope frame beam construction is carried out, the construction phenomenon exists in the side slope excavation working procedures, and the problems of less side slope construction working face, low construction working efficiency and long construction period exist. Therefore, it is necessary to design a new construction method of a high and steep rock slope to overcome the above problems. Disclosure of Invention The application provides a construction method of a high and steep rocky side slope, which can solve the technical problems of less side slope construction operation surface, low construction work efficiency and long construction period in the prior art that the side slope construction is carried out according to the principles of first-level excavation and first-level protection. In a first aspect, an embodiment of the present application provides a construction method for a steep rocky slope, including the following steps: and S1, carrying out numerical simulation analysis on the multistage multi-procedure parallel construction process of the high and steep rock slope, and determining the multistage multi-procedure synchronous parallel construction method of the high and steep rock slope according to the data simulation analysis result. S2, carrying out side slope excavation construction, anchor cable installation construction, frame beam construction and anchor cable tensioning and anchor sealing construction on the high and steep rock side slope according to a multistage multi-procedure synchronous parallel construction method determined by simulation analysis results until the high and steep rock side slope is constructed. In combination with the first aspect, in one implementation manner, the multi-stage multi-procedure synchronous parallel construction method determined according to the simulation analysis result performs slope excavation construction, anchor cable installation construction, frame beam construction and anchor cable tensioning and anchor sealing construction on the high and steep rock slope, and the method comprises the following steps: And S201, after pouring of the Nth-level slope protection frame beam is completed, transversely partitioning the Nth-level slope, and simultaneously carrying out anchor cable initial tensioning, anchor cable final tensioning and anchor sealing construction on different transverse areas of the Nth-level slope in a pipeline. S202, after installation of the N+1st-stage slope protection anchor cable is completed, transversely partitioning the N+1st-stage slope, and carrying out side slope frame beam reinforcement binding, template installation and reinforcement, concrete pouring and maintenance construction on different transverse areas of the N+1st-stage slope in a pipeline mode. S203, after finishing the protection slope surface of the N+2-level slope, transversely partitioning the N+2-level slope, and carrying out anchor rope hole drilling, anchor rope manufacturing and installation construction on different transverse areas of the N+2-level slope in a pipeline manner. S204, transversely partitioning the N+3-stage slope, and carrying out slope blasting, slag discharging and slope finishing construction in the different transverse areas of the N+3-stage slope in a pipeline mode. S205, developin