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Construction method of widening high-fill subgrade with foam light soil

A technology of foam lightweight soil and construction method, which is applied in basic structure engineering, roads, excavation and other directions, can solve the problems of embankment grading covering a wide area, large impact of post-construction settlement, large vertical additional stress, etc. cost, the effect of reducing water seepage, reducing material loss and engineering cost

Active Publication Date: 2021-09-17
杭州悦为科技有限公司
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Problems solved by technology

In the high-fill embankment project, if traditional materials (earth and rock) are used for filling, the required amount of earth and rock will be large, and the vertical additional stress will be large, which will have a great impact on post-construction settlement and easily cause road cracking and slope collapse; and construction The construction period is long, the embankment slope covers a large area, and the project cost is high; while the high filling project generally has the characteristics of tight construction period and large filling volume, it is urgent to propose corresponding solutions

Method used

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  • Construction method of widening high-fill subgrade with foam light soil
  • Construction method of widening high-fill subgrade with foam light soil
  • Construction method of widening high-fill subgrade with foam light soil

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Embodiment Construction

[0049] In order to deepen the understanding of the present invention, reference will be made to Figure 1 to Figure 12 , the embodiments of the present invention are described in detail, the following embodiments are implemented under the premise of the technical solution of the present invention, and detailed implementation is provided, but the protection scope of the present invention is not limited to the following embodiments.

[0050] The height of the filling area is 8m, and the width of the subgrade widening is two lanes and two sidewalks, totaling 12.5m, and the widening length is 2.5km. The cement is made of ordinary silicon PO42.5 (R). The anchor cables and drainage pipes are installed horizontally on the large platform. The horizontal spacing of the anchor cables is 3m, and the horizontal spacing of the drainage pipes is 5m. The steel mesh of the platform is galvanized with Φ3~4mm@5cm×5cm Barbed wire, the diameter of the reinforced plate is 0.3m, and the distance be...

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Abstract

The invention relates to a construction method for widening a high-fill roadbed with foam light soil, which is characterized in that the original old roadbed is first cut into a stepped shape, and a concrete baffle is arranged on the periphery of the widened side of the roadbed as a formwork for pouring foam light soil. The reinforcement mesh is laid horizontally at the position of the large platform to connect with the baffle, and prestressed anchor rods are added to anchor on the baffle, and the pouring construction of foam light soil is carried out by layering, partitioning and segmenting, and finally the baffle is removed and the hanging type is installed. Geotechnical bag: The construction method includes original subgrade construction, baffle installation, lightweight foam soil pouring, steel mesh and drainage pipe installation, anchor cable construction, lightweight foam soil pouring, steel support removal and installation of hanging geotechnical bags. According to the invention, baffles and pre-embedded section steel are provided on the widened side of high filling to form a stable support structure, which can effectively improve the stability of the baffle, and the section steel after construction can be recycled and used, reducing material loss and engineering cost.

Description

technical field [0001] The invention relates to widening construction of a high-fill embankment on a soft foundation with high requirements for post-construction settlement, in particular to a construction method for widening a high-fill embankment of foam light soil. Background technique [0002] The post-construction settlement caused by the widening of high-fill soft soil subgrade has always been a prominent problem. In the high-fill embankment project, if traditional materials (earth and rock) are used for filling, the required amount of earth and rock will be large, and the vertical additional stress will be large, which will have a great impact on post-construction settlement and easily cause road cracking and slope collapse; and construction The construction period is long, the embankment slope covers a large area, and the project cost is high; while the high filling project generally has the characteristics of tight construction period and large filling volume, it is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C3/04E01C3/00E02D17/20
CPCE01C3/00E01C3/04E02D17/207
Inventor 朱凯陈小林
Owner 杭州悦为科技有限公司
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