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Bent-frame-free rapid construction method for high and steep slope support

A technology for high and steep slopes and construction methods, applied in excavation, infrastructure engineering, construction, etc., can solve problems such as affecting the construction progress, long construction period, and affecting the overall stability of the slope, so as to improve construction efficiency and ensure stability. Effect

Inactive Publication Date: 2021-06-15
CHINA GEZHOUBA (GRP) FIRST ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The height of the steps is generally 10-15m. Bent frames are required for slope support, and the support construction takes a long time, which affects the construction progress. At the same time, the slope support work cannot keep up with the slope excavation progress, resulting in slope excavation If the exposure time is too long, the slope will be weathered and affect the overall stability of the slope

Method used

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  • Bent-frame-free rapid construction method for high and steep slope support
  • Bent-frame-free rapid construction method for high and steep slope support
  • Bent-frame-free rapid construction method for high and steep slope support

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as Figure 1-4 Among them, a rapid construction method for high and steep slope support without bending, including the following steps:

[0028] 1) Reserve protective layer 1 at the slope position;

[0029] 2) The side slope is excavated in layers to the position of protective layer 1 and steps 2 are formed, and the excavation sequence is as follows figure 1 In the order of "I→II→...";

[0030] 3) Carry out blasting and excavation of the protective layer and form a support construction platform 3;

[0031] 4) Carry out support construction and spray concrete on the support construction platform 3;

[0032] 5) After completing the support construction of the previous step 2, repeat steps 2)-4) to carry out the construction of the next step 2.

Embodiment 2

[0034] In the step 3), the pre-splitting blast hole and the main blast hole are drilled with the CM351 high air pressure drilling rig, and the CM351 high air pressure drilling rig is used to replace the traditional YQ-100B drilling rig for the pre-split hole drilling. Since the CM351 drill The mechanical angle of the hole is difficult to control, and the hole diameter is large. Compared with the traditional pre-splitting blasting, the charge structure needs to be adjusted experimentally, which further increases the difficulty of pre-splitting blasting.

[0035] Weld a steel plate on the arm of the CM351 high air pressure drilling rig, dig a round hole with a diameter of 3cm on the steel plate, tie a hanging wire hammer in the hole, and the surveyors will fix the pre-splitting blast holes along the opening line of the pre-splitting holes and The location of the directional hole. Pre-split blast holes are marked with red paint or red plastic bags for hole location control.

[0...

Embodiment 3

[0038] On the basis of Example 2, after the pre-splitting hole is positioned, use a goniometer measuring tool to check the hole angle and direction accurately before drilling, and the drilling can only be started after the accuracy is correct.

[0039] Since each hole needs to be checked, the workload is heavy, and the side angle of the "special slope measuring instrument" is used. Press a steel plate on the boom frame of the CM351 drilling rig, and fix the "special slope measuring instrument" on the steel plate.

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Abstract

The invention provides a bent-frame-free rapid construction method for high and steep slope support. The bent-frame-free rapid construction method comprises the following steps that 1) a protective layer is reserved at the position of the slope; 2) the slope is excavated to the position of a protective layer in a layered mode, and steps are formed; 3) blasting excavation operation of the protective layer is conducted, and a supporting construction platform is formed; 4) supporting construction is conducted on the supporting construction platform, and concrete is sprayed; and 5), after supporting construction of the previous step is completed, the steps 2)-4) are repeated, and construction operation of the next step is carried out. By means of the method, it can be guaranteed that slope supporting operation is carried out safely, supporting anchor rods can be arranged without erecting bent frames, the slope construction efficiency is greatly improved, and the slope stability is guaranteed.

Description

technical field [0001] The invention relates to the field of dangerous rock construction, in particular to a rapid construction method for high and steep slope support without bending frames. Background technique [0002] In the process of high and steep slope treatment, it is generally required to dig each floor, and the lower steps can only be excavated after the slope support of the steps is completed. The height of the steps is generally 10-15m. Bent frames are required for slope support, and the support construction takes a long time, which affects the construction progress. At the same time, the slope support work cannot keep up with the slope excavation progress, resulting in slope excavation If the exposure time is too long, the slope will be weathered and affect the overall stability of the slope. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a fast construction method for high and steep slope support...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/20
CPCE02D17/20
Inventor 涂胜虞贵期张德勇王清陈亮聂雷孙志伍文尧尧李威李超燕
Owner CHINA GEZHOUBA (GRP) FIRST ENG CO LTD
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