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A method of building high-grade highways in areas with poor geological conditions

A geological condition, high-level technology, applied in roads, buildings, roads, etc., can solve the problems of poor controllability, high cost, and poor road stability of goaf filling

Active Publication Date: 2021-08-27
王俊茹
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  • Summary
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  • Description
  • Claims
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Problems solved by technology

Therefore, the filling controllability of the goaf is poor, and the stability of the built road surface is poor.
In addition, the goaf filling construction has a large amount of work, high cost and long construction period

Method used

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with embodiment:

[0025] see Figure 1-Figure 2 , a method for building high-grade highways in areas with poor geological conditions, comprising the steps of:

[0026] Drill holes on the ground surface, and determine the position and number of drill holes according to the calculation of the length and bearing capacity of the road surface. The drill holes pass through the surface soil layer 1, bedrock layer 2, goaf 3 and stable rock layer 4 from top to bottom in order of more than 5m distance; place the outer metal casing 5 in the borehole, the bottom of the outer metal casing 5 is placed at a distance of 2m in the stable rock formation, the diameter of the outer metal casing 5 is 450-1400mm, and the pipe wall The thickness is 3-10mm; the inner metal casing 6 is placed in the outer metal casing 5, the bottom of the inner metal casing 6 is placed at the bottom of the borehole and at a distance of 5m in...

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Abstract

A method for building a high-grade highway in an area with unfavorable geological conditions, comprising the following steps: constructing a borehole on the ground surface, and the borehole passes through the surface soil layer, the bedrock layer, and the goaf from top to bottom to a depth of more than 5m in the stable rock layer Place the outer metal casing in the borehole, the bottom of the outer metal casing is placed at 2m in the stable rock formation; the inner metal casing is placed in the outer metal casing, and the bottom of the inner metal casing is placed 5m inside the stable rock formation; place a reinforced skeleton inside the inner metal casing, and pour concrete, and the reinforced concrete structure of the inner metal casing forms a stable end-bearing pile foundation; set road support on the top of the end-bearing pile foundation The beam is used to build the road surface on the upper part of the road surface support beam. The invention adopts the reinforced concrete structure of the metal casing to raise the road surface, and the metal casing passes through the goaf to form a stable end-bearing pile foundation without filling the goaf, avoiding the deformation of the rock layer from affecting the road surface, and improving the stability of the road surface.

Description

technical field [0001] The invention relates to a road construction method, in particular to a method for constructing high-grade roads in areas with poor geological conditions. Background technique [0002] When the high-grade highway passes through the goaf of the underground mine, it will encounter the collapse of the rock formation in the goaf, the continuous settlement and displacement of the stratum, and finally a basin will be formed on the ground. With the different depths of goafs, the settlement and deformation time of rock formations are different, and the unstable period can reach more than 10 years. For the construction of high-grade highways, corresponding measures must be taken to prevent surface deformation and control rock movement. [0003] At present, it is known that most of the high-grade highways that have passed through the goaf are filled with concrete mortar from the ground to fill the gob and control the change of rock strata. After the above meas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C3/00E02D5/38E02D5/66
CPCE01C3/00E02D5/38E02D5/665E02D2250/0023
Inventor 王俊茹
Owner 王俊茹
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