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Roadbed construction method for soft foundation area

A base and subgrade technology, applied in infrastructure engineering, roads, roads, etc., can solve problems such as difficult construction of subgrades, and achieve the effect of increasing stability

Inactive Publication Date: 2020-12-18
江苏兴业环境集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for roadbed construction in soft ground areas, which solves the problem that the roadbed is not easy to construct

Method used

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  • Roadbed construction method for soft foundation area

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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, the embodiment of the present invention provides a method for subgrade construction in a soft ground area, including a main body 7, side layers 1 are arranged on both sides of the main body 7, and mixing piles 3 are provided through the inside of the main body 7 to form a pair of The stability of the roadbed increases the service strength of the roadbed and prevents the subsidence of the roadbed. The upper end of the main body 7 is provided with an adhesive layer 4, the upper end of the adhesive layer 4 is provided with a crushed stone layer 2, and the upper end of the crushed stone layer 2 is provided with an asphalt layer. 5. The upper end of the side layer 1 and the two sides of the gravel layer 2 are provided with arc-shaped sides 6 .

[0033] The asphalt in the asphalt layer 5 seeps into the middle gap of the gravel layer 2, so that the asphalt layer 5 and the gravel layer 2 are effectively bonded to increase the stability of the roadbed,...

Embodiment 2

[0035] A method for subgrade construction in a soft ground area, comprising the following steps:

[0036] S1. Clean up the surface of the roadbed, remove the weeds and large stones on the surface of the roadbed, fill in the potholes, and remove the surface water;

[0037] S2. Set pile driver, mixing pile and drilling rig, and position the mixing pile according to the designed drawings, and position the drilling rig relative to the mixing pile to ensure that the inclination angle of the pile driver is not greater than 0.8%;

[0038] S3. Check the mixing pile before use to avoid blockage of the pipeline and affect the use;

[0039] S4. Prepare a cement material, the cement mixing ratio is 0.4-0.5, the cement content is 13%, the ash content per meter is 46kg, and the superplasticizer is 0.6%;

[0040] S5. Start the drilling rig to drill to the designed position, the drilling speed of the drilling rig is about 350-450mm / min, and start the shotcrete pump to pour the cement at the ...

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Abstract

The invention provides a roadbed construction method for a soft foundation area, and relates to the field of roadbed construction. According to the roadbed construction method for the soft foundationarea, a main body is included, side edge layers are arranged on the two sides of the main body correspondingly, stirring piles are arranged in the main body in a penetrating mode, a bonding layer is arranged on the upper end face of the main body, a gravel layer is arranged at the upper end of the bonding layer, and an asphalt layer is arranged at the upper end of the gravel layer. Arc-shaped edges are arranged at the upper ends of the side edge layers and opposite to the two sides of the gravel layer. The stirring piles are effectively used through effective construction, cement and soft soilare fully mixed to form reinforcement, the roadbed is reinforced through the gravel layer and the asphalt layer, the roadbed is waterproof through a waterproof agent with which the asphalt layer is coated, and water is guided through the arc-shaped edges at the side edge layers.

Description

technical field [0001] The invention relates to the technical field of roadbed construction, in particular to a method for roadbed construction in soft ground areas. Background technique [0002] Soft soil roadbed refers to a common roadbed in a special area. Requires special design handling. It is mostly distributed in rivers, rivers, ocean coasts, inland lakes, ponds, basins and rainy mountain depressions. Soft soils are characterized by high water content, poor permeability, low natural strength and high compressibility. If the critical height is exceeded, the foundation will lose its stability. Commonly used treatment measures for soft soil foundation include soil replacement, drainage sand cushion, back pressure berm, riprap for silting, cement-soil mixing, surface reinforcement with civil fabrics, and sand well reinforcement. [0003] The cause of soft soil is generally believed to be due to the sediment formed by surface water in the late Quaternary period, which ...

Claims

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Application Information

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IPC IPC(8): E01C3/00E02D5/46E01C7/32C04B28/00
CPCE01C3/00E02D5/46E01C7/32C04B28/00C04B2111/0075C04B2111/00732C04B2103/302
Inventor 胡正勤胡增侯瑛
Owner 江苏兴业环境集团有限公司
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