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Road widening system and road widening method for collapsible yellow earth foundation layer

A loess and collapsible technology, applied in roads, roads, buildings, etc., can solve problems affecting driving comfort and safety, differential settlement longitudinal cracks, instability and damage, etc.

Active Publication Date: 2015-08-05
山西省交通科技研发有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when the road widening project is carried out on the collapsible loess base, the problems of differential settlement and longitudinal cracks between the widened road and the original road are more significant, and even instability and damage occur during the operation process, which seriously affects the driving safety of the widened road. Comfort and Safety

Method used

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  • Road widening system and road widening method for collapsible yellow earth foundation layer
  • Road widening system and road widening method for collapsible yellow earth foundation layer
  • Road widening system and road widening method for collapsible yellow earth foundation layer

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Embodiment

[0053] see figure 1 , a road widening system on a collapsible loess soil base, the system includes a geogrid 1, a filling layer 2, a micro-rigid pile 3, a lime-soil replacement layer 4, a compacted cement-soil pile wall 5, and a road to be widened for water stability Layer 6, road surface to be widened 7, collapsible loess base 8, drainage ditches 9.

[0054] Geogrid 1 is laid between the fill layers 2 of each layer, the distance between each layer of geogrid 1 is 0.9m, the height of each fill layer is 30cm, and steps are excavated towards the slope of the original embankment 11 with a width of 1.2m , the compaction degree of the filling layer is the same as that of the original embankment 11.

[0055] The micro-rigid pile 3 is vertically driven into the original embankment 0.5m away from the edge of the excavation step on the slope of the original embankment 11, and penetrates the geogrid 1. The micro-rigid pile 3 and the geogrid 1 form a stable connection structure to stren...

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Abstract

The invention discloses a road widening system and a road widening method for a collapsible yellow earth foundation layer. The road widening system for the collapsible yellow earth foundation layer comprises a collapsible yellow earth foundation layer, a lime earth changing and filling layer, filling layers, geogrids, a water stable layer of a to-be-widened road, a pavement of the to-be-widened road, micro rigid piles and a compacted cement soil pile wall. The collapsible yellow earth foundation layer, the lime earth changing and filling layer, the filling layers, the water stable layer of the to-be-widened road and the pavement of the to-be-widened road are sequentially distributed in a laminar manner from bottom to top; the compacted cement soil pile wall penetrates through the lime earth changing and filling layer and is longitudinally inserted into the collapsible yellow earth foundation layer; the one or more layers of geogrids are longitudinally paved in the filling layers; the micro rigid piles penetrate through the geogrids and are longitudinally inserted into an original embankment. The road widening system and the road widening method for the collapsible yellow earth foundation layer aim at implementing road widening for the collapsible yellow earth foundation layer, and the road widening system is reasonable in structural mechanical property, good in integrality and controllable in quality.

Description

technical field [0001] The invention belongs to the field of road widening engineering in collapsible loess areas, and relates to a road widening system and a road widening method on a collapsible loess base. Background technique [0002] With the rapid development of my country's economy, the role of roads in the development of the national economy has become more and more prominent. However, the traffic capacity of some roads can no longer meet the needs of increasing traffic volume, which causes a waste of time and an increase in transportation costs, which seriously affects the development of the regional economy. In order to meet the rapidly increasing traffic requirements and improve the road service level, and better serve the economic construction, widening the road has become an inevitable choice. [0003] At present, in the road widening project, the main problem is that the overall performance between the widened road and the original road is poor. During the ope...

Claims

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Application Information

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IPC IPC(8): E01C3/00E01C3/04
Inventor 张军赵建斌董立山孙志杰
Owner 山西省交通科技研发有限公司
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