Compensation method for roadbed settlement

Abstract

The invention provides a compensation method for roadbed settlement, which comprises the steps that: when in a roadbed construction process, on a road section which can easily settle and deform after being open to traffic, when a roadbed is filled to a height which is 30cm to 200cm from the top surface, retaining walls are built on both sides of the roadbed; bagged lime is uniformly paved on the inner sides of the retaining walls within the full-width range of the roadbed on different layers; a rubber pipe is pre-reserved on each lime bag to the outer side of the roadbed as a water injection channel in a later period; the bottom surfaces of the retaining walls are 20cm to 100cm lower than the bottom surfaces which are paved from the bagged lime, and the top surfaces of the retaining wallsare in alignment with the top surface of the roadbed; and when the roadbed settles, the water is injected into the lime bags through the pre-reserved rubber pipe, the lime absorbs the water, swells and jacks a road surface structure up. The compensation method for roadbed settlement completes the water injection on the outer side of the roadbed, has a short construction time, does not interrupt the traffic during the construction process and has little interference to the traffic; and the construction is not restricted by the weather and the environment, the settlement can be handled at any time when being found, and the construction process is controllable.

Description

technical field

[0001] The invention relates to a treatment method for roadbed disease, in particular to a compensation method for roadbed settlement. Background technique

[0002] After the road is opened to traffic, roadbed settlement is very common due to various reasons such as poor foundation conditions, poor-quality roadbed filler, improper construction technology, climate and environmental factors, which seriously affects the performance of the road and threatens traffic safety. Existing technologies to deal with subgrade settlement (such as excavating and replacing new subgrade and pavement materials, filling pavement materials directly above the road surface, etc.) have the following deficiencies: traffic needs to be closed during the construction process, which seriously interferes with vehicle traffic and is prone to traffic accidents; Affected by the climate, construction cannot be carried out in rainy days, and subgrade settlement cannot be dealt with in time. ...

Examples

Embodiment 1

[0019] The subgrade section at the bridgehead of K2+300~K2+320 of an expressway has a length of 20m and a width of the top surface of the subgrade of 26m. During the roadbed construction, when the roadbed is filled to a height of 80cm from the top surface of the roadbed, retaining walls shall be built on both sides of the roadbed. The bottom surface of the retaining wall is 50cm lower than the bottom surface of the bagged quicklime paving, and the top surface of the retaining wall is flush with the top surface of the roadbed. The width of the subgrade between the two retaining walls is 24m.

[0020] Within the full width of the subgrade inside the retaining wall, 1,000 bags of quicklime were evenly paved in 4 layers on each layer. Calcium quicklime is used, the calcium oxide content is 80%; the water content is 0.8%.

[0021] Quicklime is packaged in airtight, deformable rubber bags. The quality of each bag of quicklime is 250kg. Connect a rubber tube to the outside of the...

Embodiment 2

[0027] The subgrade section at the bridge head of an expressway K30+500~K30+540 has a length of 40m and a width of 26m at the top of the subgrade. During the roadbed construction, when the roadbed is filled to a height of 60cm from the top surface of the roadbed, retaining walls shall be built on both sides of the roadbed. The bottom surface of the retaining wall is 20cm lower than the bottom surface of the bagged quicklime paving, and the top surface of the retaining wall is flush with the top surface of the roadbed. The width of the subgrade between the two retaining walls is 24m.

[0028] Within the full width of the subgrade inside the retaining wall, 2,000 bags of quicklime were evenly paved in 3 layers on each layer. Magnesia quicklime is used, with a magnesium oxide content of 98% and a water content of 0.5%.

[0029] Quicklime is packaged in airtight, deformable rubber bags. The quality of each bag of quicklime is 300kg. Connect a rubber tube to the outside of ...

technical field

[0001] The invention relates to a treatment method for roadbed disease, in particular to a compensation method for roadbed settlement. Background technique

[0002] After the road is opened to traffic, roadbed settlement is very common due to various reasons such as poor foundation conditions, poor-quality roadbed filler, improper construction technology, climate and environmental factors, which seriously affects the performance of the road and threatens traffic safety. Existing technologies to deal with subgrade settlement (such as excavating and replacing new subgrade and pavement materials, filling pavement materials directly above the road surface, etc.) have the following deficiencies: traffic needs to be closed during the construction process, which seriously interferes with vehicle traffic and is prone to traffic accidents; Affected by the climate, construction cannot be carried out in rainy days, and subgrade settlement cannot be dealt with in time. ...

Examples

Embodiment 1

[0019] The subgrade section at the bridgehead of K2+300~K2+320 of an expressway has a length of 20m and a width of the top surface of the subgrade of 26m. During the roadbed construction, when the roadbed is filled to a height of 80cm from the top surface of the roadbed, retaining walls shall be built on both sides of the roadbed. The bottom surface of the retaining wall is 50cm lower than the bottom surface of the bagged quicklime paving, and the top surface of the retaining wall is flush with the top surface of the roadbed. The width of the subgrade between the two retaining walls is 24m.

[0020] Within the full width of the subgrade inside the retaining wall, 1,000 bags of quicklime were evenly paved in 4 layers on each layer. Calcium quicklime is used, the calcium oxide content is 80%; the water content is 0.8%.

[0021] Quicklime is packaged in airtight, deformable rubber bags. The quality of each bag of quicklime is 250kg. Connect a rubber tube to the outside of the...

Embodiment 2

[0027] The subgrade section at the bridge head of an expressway K30+500~K30+540 has a length of 40m and a width of 26m at the top of the subgrade. During the roadbed construction, when the roadbed is filled to a height of 60cm from the top surface of the roadbed, retaining walls shall be built on both sides of the roadbed. The bottom surface of the retaining wall is 20cm lower than the bottom surface of the bagged quicklime paving, and the top surface of the retaining wall is flush with the top surface of the roadbed. The width of the subgrade between the two retaining walls is 24m.

[0028] Within the full width of the subgrade inside the retaining wall, 2,000 bags of quicklime were evenly paved in 3 layers on each layer. Magnesia quicklime is used, with a magnesium oxide content of 98% and a water content of 0.5%.

[0029] Quicklime is packaged in airtight, deformable rubber bags. The quality of each bag of quicklime is 300kg. Connect a rubber tube to the outside of ...