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Construction method for reinforcing soft rock roadbed by applying geocells and reinforcement effect testing method

A geocell and construction method technology, which is applied in the field of foundation soil survey, roads, roads, etc., can solve the problems of insufficient understanding of engineering properties, uneven settlement, and mud and mud in the foundation bed, so as to improve the service life and driving efficiency. Safety and comfort, avoid uneven settlement, strong maneuverability

Pending Publication Date: 2020-04-10
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the expansion of scale, problems also come with
The main problem occurs in the maintenance of high-speed roads. Due to the insufficient strength of the roadbed, cracking and uneven settlement of the road surface occur
The cost of major maintenance and maintenance of highways in areas with continuous deformation and lack of stiffness and poor soil conditions is quite high, so how to effectively and economically strengthen the roadbed needs to be solved urgently
In the prior art, due to the lack of understanding of the engineering properties of soft rock weathering materials and the limitations of technical and economic conditions, the roadbed filled with this kind of filler will have serious roadbed diseases under the action of traffic cycle load and natural conditions after many years of operation. For example, the subgrade bed is swollen and muddled, the subgrade subsidence, and the side slope collapses, etc., which lead to the deterioration of the subgrade structure and the increase of maintenance works
Therefore, the application of such fillers in railways and highways has been limited for a long time

Method used

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  • Construction method for reinforcing soft rock roadbed by applying geocells and reinforcement effect testing method
  • Construction method for reinforcing soft rock roadbed by applying geocells and reinforcement effect testing method
  • Construction method for reinforcing soft rock roadbed by applying geocells and reinforcement effect testing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] See attached figure 1 And attached figure 2 , Embodiment 1 of the present invention provides a construction method for using geocells to reinforce soft rock subgrades, wherein the soft rock subgrade to be reinforced includes 93 areas with a compaction degree of 93% and a compaction degree of 94% from the bottom layer to the top layer. In the 94th zone and the 96th zone in which the degree of compaction is 96%, the construction method of using geocells to strengthen the soft rock subgrade includes the following steps:

[0052] Step S1: In order to make the paving and force of the geocell more uniform, perform the first leveling treatment on the soft rock subgrade to be reinforced, and obtain the soft rock subgrade to be reinforced after leveling;

[0053] Step S2: On the basis of the leveled soft rock subgrade to be reinforced, pave geocells on the top surface of area 94 to obtain a soft rock subgrade to be reinforced with geocells paved; in this case, the 96 area The...

Embodiment 2

[0080] See attached image 3 , the method for testing the roadbed reinforcement effect provided by Embodiment 2 of the present invention comprises the following steps:

[0081] Obtain the representative value of the subgrade top surface deflection measured in the soft rock subgrade road section after the reinforcement obtained by the construction method of embodiment one;

[0082] Compare the relationship between the representative deflection value of the subgrade top surface measured in the reinforced soft rock subgrade section and the acceptance deflection value of the reinforced soft rock subgrade top surface:

[0083] When the measured representative deflection value of the subgrade top surface in the reinforced soft rock subgrade section is less than or equal to the acceptance deflection value of the reinforced soft rock subgrade top surface, the reinforced soft rock subgrade is considered qualified.

[0084] In this embodiment, the formula for calculating the acceptance...

Embodiment 3

[0093] Such as figure 1 As shown, the filling of the entire embankment is divided into three areas, 93 area 1, 94 area 2, and 96 area 3. Two-way high-strength PET plug-in geocells are laid on the bottom of 96 area 3. Each layer of filling is made of soft rock excavated on site.

[0094] First, after filling 70cm, use a deflection meter to test the deflection value under the filled embankment at the top of the 93 area, and use a dynamic cone penetrometer to test the dynamic penetration value. Then as figure 2 As shown, after the embankment is replaced by 25cm, the earth pressure cell 5 is buried, and the temperature and humidity sensors 6 are buried. The earth pressure cell 5 is placed at an interval of 2 meters along the direction vertical to the centerline of the embankment, and is 15cm away from the two earth pressure cells on the edge. place a high-precision temperature and humidity sensor 6. After continuing to fill 25cm, carry out compaction and leveling, and use the ...

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Abstract

The invention discloses a construction method for reinforcing a soft rock roadbed by applying geocells and a reinforcement effect testing method, and belongs to the technical field of soft rock roadbed reinforcing. The construction method comprises the steps of conducting primary leveling treatment on a soft rock roadbed to be reinforced; paving geocells on the top surface of the 94 area on the basis of the leveled soft rock roadbed to be reinforced; filling a geocell reinforced layer on the basis of the to-be-reinforced soft rock roadbed paved with the geocells; and conducting secondary leveling treatment on the filled soft rock roadbed to be reinforced. The testing method can be implemented by comparing the size relationship between an actually measured representative value of the roadbed top surface deflection in the reinforced soft rock roadbed road section and an acceptance deflection value of the reinforced soft rock roadbed top surface. The construction method has the characteristics of simplicity, convenience and high operability. The testing method is simple and convenient to implement and low in cost.

Description

technical field [0001] The invention relates to the technical field of soft rock subgrade reinforcement, in particular to a construction method for reinforcing soft rock subgrade with a geocell and a method for testing the reinforcement effect thereof. Background technique [0002] With the rapid development of China's expressway industry, in the past few years, my country's expressway network has become larger and larger. The traffic and transportation efficiency of expressways have also received close attention. But with the expansion of scale, problems also come with it. The main problem is the maintenance of high-speed roads. Due to the insufficient strength of the roadbed, cracking and uneven settlement of the road surface occur. The cost of major maintenance and maintenance of highways in areas with continuous deformation and lack of stiffness and poor soil conditions is quite high, so how to effectively and economically strengthen the roadbed needs to be solved urge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E01C3/04E02D1/00
CPCE01C3/00E01C3/04E02D1/00
Inventor 卢正卢硕姚海林唐红
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI