A tunnel entry construction method based on protection of natural vegetation on slopes

A construction method and technology of natural vegetation, applied in the direction of tunnel, tunnel lining, infrastructure engineering, etc., can solve the problem of large environmental damage of slopes and slopes, and achieve the effect of protecting the natural vegetation of slopes and slopes.

Active Publication Date: 2020-11-06
陕西路桥集团有限公司
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a tunnel entry construction method based on protecting the natural vegetation of the side slope to solve the disadvantages of the large environmental damage of the side slope in traditional tunnel construction

Method used

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  • A tunnel entry construction method based on protection of natural vegetation on slopes
  • A tunnel entry construction method based on protection of natural vegetation on slopes
  • A tunnel entry construction method based on protection of natural vegetation on slopes

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example 2

[0073] Project example 2: A tunnel is 467 meters long on the left and 447 meters long on the right, with a net height of 5 meters and a net width of 10.25 meters. The topography of the entrance of the left tunnel is slightly biased. According to the traditional design method, the excavation height of the tunnel entrance can reach 25 meters, especially at the intersection of the side slope and the upward slope, the excavation height can reach 30 meters, which will cause great damage to the natural environment.

[0074] Adopt the tunnel entry construction method of the present invention to carry out construction.

[0075] After checking the topographic and geological conditions on site, it was found that the surrounding rock at the entrance of the cave is shallow metamorphic phyllite, which is moderately weathered but is beneficial to the stability of the tunnel structure. Based on this, the following construction methods for entering the tunnel were determined: ① Advance the tun...

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Abstract

The invention provides a tunnel holing construction method based on natural vegetation of a protection edge heading slope. The method comprises the following steps that 1, at the position of a hole door of a tunnel, a groove opening only for a loader or an excavator to enter and exit from is dug along the center line of the tunnel; 2, digging is conducted in the direction from the groove opening to a dark hole, when vault earthing reaches 0-3 m and a terrain and geology condition accords with the stable structure, the interface surface of construction light and dark holes is determined, and advanced digging is stopped; 3, the steering range of the loader or the excavator is horizontally widened until the predetermined position of the edge slope is dug; 4, a cover arch and a pipe shed are manufactured, and a dark hole construction stage is started. According to the tunnel holing construction method, by using the groove opening dug in the hole door, the site geology condition and the stability of surrounding rock occurrence are accurately judged, in this way, a traditional mechanical edge heading slope form without consideration of the site geology condition is optimized, accordinglyzero-digging holing is achieved, and the natural vegetation of the edge heading slope is protected to the greatest degree.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a tunnel entry construction method based on the protection of natural vegetation on slopes. Background technique [0002] Our country practices the concept that green water and lush mountains are golden mountains and silver mountains, and insists on the harmonious coexistence of man and nature. This requires us to establish a brand-new way of thinking for the comprehensive and coordinated development of infrastructure construction and environmental protection in engineering construction, take the protection of the ecological environment as the premise, and make reasonable use of the ecological environment as the guide, and make the impact of engineering construction (excavation) on the natural ecology Adverse impacts are minimized, and a path of coordinated development between road construction and ecological environment is sought to achieve sustainable development. [0003] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/00E21D9/14E21D11/18E02D17/20
CPCY02A10/23
Inventor 胡平马迎生王琦贺伟
Owner 陕西路桥集团有限公司
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