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Method for constructing high-grade highway in region with unfavorable geological conditions

A geological condition and high-level technology, applied in roads, roads, buildings, etc., can solve the problems of poor controllability of goaf filling, large construction work volume, poor road stability, etc., to achieve large bearing capacity, wide application range, time-saving effect

Active Publication Date: 2018-11-23
王俊茹
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  • Claims
  • Application Information

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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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  • Method for constructing high-grade highway in region with unfavorable geological conditions
  • Method for constructing high-grade highway in region with unfavorable geological conditions

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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 constructing a high-grade highway in a region with unfavorable geological conditions comprises the following steps: drilling a hole in the surface of the ground, wherein a borehole passesthrough a surface soil layer, a bedrock layer and a goaf from top to bottom, and goes into a stable rock layer at a depth of 5m or more; placing an outer layer metal sleeve in the borehole, wherein the bottom of the outer metal sleeve is placed 2m inside the stable rock layer; placing an inner layer metal sleeve in the outer metal sleeve, wherein the bottom of the inner layer metal sleeve is 5m in the stable rock layer; placing a steel framework inside the inner layer metal sleeve, and pouring concrete, wherein an inner layer metal sleeve reinforced concrete structure forms a stable end bearing pile foundation; and arranging a pavement support beam on the upper part of the end bearing pile foundation, and constructing a pavement on the upper part of the pavement support beam. The metal sleeve reinforced concrete structure is adopted to make the pavement overhead, and the inner layer metal sleeve passes through the goaf to form the stable end bearing pile foundation, and filling with the goaf is not needed, thus avoiding deformation of the rock layer to affect the pavement and improving the stability of the pavement.

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 Applications(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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