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Construction method for boring of extra large diameter pile foundation in dangerous landform region of mountainous area

A topography, super-large diameter technology, applied in infrastructure engineering, sheet pile walls, buildings, etc., can solve problems such as waste of resources, failure to achieve expected results, increase construction costs, etc., to reduce difficulty and speed up manual excavation , Guarantee the effect of quality

Inactive Publication Date: 2018-06-22
CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD +1
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A single rotary drilling rig or manual digging can only be realized if the site conditions and geological conditions allow it. At the same time, it is impossible to build large-scale temporary access roads for large-scale machinery and equipment in areas with dangerous terrain and landforms in heavy mountainous areas, resulting in waste of resources and increased construction costs

Method used

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  • Construction method for boring of extra large diameter pile foundation in dangerous landform region of mountainous area
  • Construction method for boring of extra large diameter pile foundation in dangerous landform region of mountainous area
  • Construction method for boring of extra large diameter pile foundation in dangerous landform region of mountainous area

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Experimental program
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Embodiment

[0019] Use UAV aerial photography to obtain the image of the area to be constructed, and combine BIM technology and the digital map of the area to establish a digital map model and digital map simulation terrain for the area, and derive the actual topography of the site. According to the simulated terrain on the digital map, the amount of excavation and filling is reasonably allocated, and materials are collected locally at the filling place, and construction access roads, construction sites and slope protection operation platforms are planned and built. digital map model figure 1 , the digital map simulates the terrain to participate in figure 2 .

[0020] The construction access road provides reliable traffic conditions for small rotary drilling rigs to enter the site smoothly. Due to site limitations, the construction access road does not have the conditions for large-scale machinery to enter the site. The construction access road is 6.5m wide and laid with reinforced mes...

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Abstract

The invention discloses a construction method for boring of an extra large diameter pile foundation in a dangerous landform region of a mountainous area. According to the method, aerial photography with an unmanned aerial vehicle, the BIM technology and a digital map are used, so that the problem that measurement of the dangerous landform construction region of the mountainous area is difficult iseffectively solved, and more accurate and visual data are provided for onsite construction planning; and then a small rotary drilling rig is used for drilling a plurality of reasonably-arranged smallholes at first, backfilling is carried out, then manual hole digging is conducted, and slag removing and boring are carried out. A feasible technological means is provided for boring of the moderately weathered rock large diameter pile foundation which has high environment protection requirements, cannot allow blasting method excavation, does not have a large equipment entering condition and hashigh excavation difficulty. In addition, manual excavation difficulty is reduced, the manual excavation speed of the pile foundation under the special environment is increased, and the boring qualityof the pile foundation is guaranteed.

Description

technical field [0001] The invention relates to the technical field of bridge construction, especially for the formation of large-diameter pile foundations in weakly weathered rock formations in heavy mountainous areas with sinister terrain and landforms, mountainous construction areas without large-scale temporary access roads, and without large-scale construction machinery entering and exiting the site. hole construction method. Background technique [0002] Both rotary drilling rig drilling and manual digging are a commonly used bridge pile foundation hole-forming construction method, and are widely used in various large-scale bridge pile foundation construction fields. [0003] A single rotary drilling rig or manual digging can only be realized if the site conditions and geological conditions allow it. At the same time, it is impossible to build large-scale temporary access roads for large-scale machinery and equipment in areas with dangerous topography and landforms in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/36
CPCE02D5/36
Inventor 张鸿文金健李国华王海峰周洋王雪松
Owner CHINA RAILWAY SHANGHAI ENGINEERING BUREAU GROUP CO LTD
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