An Embankment Treatment Method Combining Load Reduction, Reinforcement and Drainage

Abstract

The embankment treatment method combining load reduction, reinforcement and drainage provided by the present invention includes determining the type of road where the embankment to be treated is located, determining the target embankment to be processed according to the road type, and carrying out the treatment on the target embankment to be processed. For leveling and rolling treatment, calculate the replacement rate according to the settlement control requirements of the embankment to be treated and the target embankment, determine the number of pipes to be used according to the replacement rate and the diameter of the pipes used, and arrange the pipes evenly in the target embankment according to the principle of plum blossom laying , and draw the pipeline layout design drawings, prefabricate the pipelines, arrange the pipelines evenly in the target embankment, fill the embankment soil between the pipelines, and form the reinforced load-reducing unit between the pipelines and the embankment soil filled between the pipelines, Lay the drainage belt unit and the earth filling layer on the reinforcement load reduction unit, and lay the reinforcement load reduction unit, the drainage belt unit and the earth filling layer successively from bottom to top at the target embankment for filling until Embankment construction completed.

Description

Technical field: [0001] The invention relates to embankments and geological disasters, belongs to the technical field of traffic engineering, and specifically refers to an embankment treatment method combining load reduction, reinforcement and drainage. Background technique: [0002] Differential settlement of highways is a common highway disease, especially in highways built in coastal soft soil areas. The foundation soil in coastal areas is mainly soft soil foundation, which has the characteristics of high compressibility, high water content, poor permeability, and high sensitivity, and is prone to consolidation and shear deformation, resulting in large differential settlement. In engineering and practice, it can often be found that the transition section of different subgrades, the transition section of the bridge head, and the transition section of the old and new subgrades in the expansion project are high-incidence sections of differential settlement problems. The mai...

AI Technical Summary

Problems solved by technology

The hazards of differential settlement sections of highways mainly include: (1). When vehicles pass by, jumps and impacts are generated, which cause additional impact loads on the road surface and damage the structure of the road surface.

(2). The vehicle bumps and slows down sharply when passing, which has potential traffic accident hazards

(3). The settlement is too large, and vehicles cannot pass, which affects the normal operation of the road and causes direct economic losses

Engineering practice shows that there is still a certain differential settlement phenomenon in the treatment of pavement by pavement overlay method. For subgrade, pavement overlay increases the overlying load, deepens the settlement, delays the project, and consumes resources.

2. Poor stability

In general engineering practice, after the differential settlement section is overlaid, the load on the embankment will be increased, resulting in lateral displacement of the embankment, which is not conducive to the long-term stability of the embankment

3. The phenomenon of stress concentration is more obvious

After the pavement is overlaid, the upper load value of the subgrade will increase, and the subsidence road section will have stress concentration due to the existence of the overpave load, resulting in secondary settlement.

After the secondary settlement, the pavement is paved again, the stress is concentrated again, and the differential settlement is greater. This will form a vicious circle, which is not conducive to the safety, durability and social economy of the project.

[0005] The embankment replacement method and embankment reinforcement method also have certain defects when dealing with differential settlement of embankments, which are manifested in the following aspects: 1. The control effect of differential settlement is not obvious

The replacement method is restricted by the replacement rate. When the replacement rate is difficult to increase, the settlement control effect is difficult to reflect

Second, the construction process is more cumbersome

3. High construction investment

In this case, construction investment will increase substantially

4. The tensile strength of the reinforced material has not been fully exerted

After the embankment is reinforced, the effect of reinforcement needs to be deformed in advance, and the tensile strength of the reinforced material that has not been stretched is limited, so that the reinforced material cannot fully exert its tensile performance

5. The embankment replacement method reduces the overlying load, but the stability also decreases; the embankment reinforcement method ensures the stability of the structure, but the utilization rate of the reinforcement is not high, and the reinforcement effect cannot be fully exerted

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