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Paving operation method for treating laterite granules with large-thickness cement

A technology of laterite granular material and large thickness, which is applied in the field of coagulation pavement, earth mover/shovel, mechanically driven excavator/dredger, etc., can solve problems such as shortage and achieve good integrity and compactness, ensuring the effect of large-scale construction operations

Inactive Publication Date: 2020-07-03
CHINA ROAD & BRIDGE +1
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  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the backward construction conditions in Africa and the lack of such special equipment, how to use the existing construction equipment to complete the paving operation of large-thickness cement-treated laterite aggregates, to ensure the continuity of construction and achieve good implementation results is a problem. A big problem facing Chinese companies

Method used

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Embodiment Construction

[0019] Taking one of the African French-speaking countries—the cement treatment of laterite aggregate construction of a highway in Senegal as an example, the specific implementation mode of the present invention is described.

[0020] This expressway cement handles laterite granular material design thickness h to be 25cm, because thickness is greater than 20cm, belongs to large thickness cement and handles laterite granular material structural layer, has used paving operation method among the present invention in construction, and concrete steps are as follows:

[0021] 1) Paving preparation. Use a level to measure the surface elevation H1 of the lower bearing layer to be 1m, and install steel formwork with a thickness of 25cm on both sides of the construction section.

[0022] 2) Layout points. The total volume V of laterite aggregates loaded with cement in the transport vehicle is 20m 3 , the cement-treated lateritic aggregate loosening coefficient α is 1.32 according to e...

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Abstract

The invention relates to a paving operation method for treating laterite granules with large-thickness cement, and concretely provides a paving operation method for treating laterite granules with large-thickness cement based on a loader, a land leveler and a GPS elevation control system. The cement treated laterite granule structure layer after construction is ensured to have good integrity and compactness, meanwhile, the construction continuity can be ensured, and feasible technical guidance can be provided for large-scale construction of similar projects in African areas.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a paving operation method for treating laterite aggregates with large-thickness cement. Background technique [0002] Laterite aggregates are mainly distributed in Africa. Due to their abundant reserves, certain bearing capacity after compaction, and relatively low price, they are widely used in local road construction fields. Among them, the cement-treated laterite aggregate formed by adding 2-3% cement and 6-8% water to the laterite aggregate is mostly used as the subgrade improvement layer between the soil foundation and the base in African pavement engineering. [0003] In recent years, the number of road infrastructure projects aided by Chinese-funded enterprises in Africa has gradually increased. Due to the lack of basic research work, there is no national standard for road construction in most African countries at present, and countries in the French-speaking Afr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/00E01C19/12E02F3/76E02F3/80E02F3/84E01C19/23
CPCE01C7/00E01C19/12E01C19/23E02F3/76E02F3/80E02F3/844
Inventor 张建国刘海岩梁东东周兴业马建民
Owner CHINA ROAD & BRIDGE