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Structure and construction method for connecting new subgrade and old subgrade

A construction method and subgrade technology, applied in the directions of roads, roads, buildings, etc., can solve the problems of uneven settlement and damage of old and new subgrades, and achieve the effects of reducing uneven settlement, increasing integrity, and improving structural density.

Active Publication Date: 2017-09-01
中国建筑土木建设有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, provide a structure and construction method for connecting the old and new roadbeds, and solve the problem of damage caused by the uneven settlement of the old and new roadbeds in the widening section of the existing roadbeds

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  • Structure and construction method for connecting new subgrade and old subgrade
  • Structure and construction method for connecting new subgrade and old subgrade
  • Structure and construction method for connecting new subgrade and old subgrade

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Embodiment Construction

[0043] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0044] Refer to Figure 4 The present invention provides a structure and construction method for connecting new and old roadbeds, which is suitable for road reconstruction projects, that is, connecting new roads beside original roads to achieve the purpose of widening roads. Since the junction between the new and the old roadbed is easily damaged due to uneven settlement, the present invention enhances the structural strength of the new roadbed by arranging the geocell at the ground of the new roadbed, and can ensure that the new roadbed is in a good stress state after the load is applied. , To reduce the settlement of the new roadbed. The new roadbed of the present invention is provided with a two-way geogrid between the upper roadbed and the lower roadbed, and the geogrid is arranged to improve the structural strength of the joint between the new and old roa...

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Abstract

The invention relates to a construction method for connecting a new subgrade and an old subgrade. The construction method comprises the following steps that excavation is conducted on the position of a side slope of the old subgrade to form a step side slope; an earthwork standard room is laid on the ground surface of the new subgrade, and the end portion of the earthwork standard room butts against the edge of the step side slope and is fixed; the earthwork standard room is filled with plain soil and the plain soil is flattened to form a plain soil layer; layered filling and lamination are conducted on the plain soil layer to form a lower part roadbed which is connected with the step side slope; a two-way geo-grid is laid on the lower part roadbed; layered filling and lamination are conducted on the geo-grid to form an upper part roadbed which is connected with the step side slope; and a pavement layer connected with the step side slope is constructed on the upper part roadbed. The earthwork standard room and the geo-grid are combined, so that the integrality of the new subgrade and the old subgrade is enhanced, the differential settlement can be reduced, and the quality of a highway is ensured.

Description

Technical field [0001] The invention relates to the field of road construction, in particular to a structure and construction method for connecting new and old roadbeds. Background technique [0002] With the rapid economic development, most of the highway functions can no longer meet the increasing traffic demand of the society. Therefore, it is imperative to upgrade the original highways. The widening of the roadbed is the key to the renovation project, whether it is design or construction. After the highway has been opened to traffic for many years, the settlement of the subgrade has been basically completed. The widening section of the subgrade will inevitably bring damage to the junction of the old and new subgrade due to the uneven settlement of the new and old subgrade, thereby causing damage to the highway. For this reason, it is necessary to provide a structure and construction method for connecting new and old roadbeds to reduce the uneven settlement of the new and old...

Claims

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Application Information

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IPC IPC(8): E01C3/00E01C3/04
CPCE01C3/00E01C3/04
Inventor 刘斌马明磊陈艳明仲丛伟
Owner 中国建筑土木建设有限公司
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