Construction method of highway widened roadbed

A construction method and subgrade technology, applied in the directions of roads, roads, buildings, etc., can solve the problem of weak connection between the new subgrade and the original subgrade, and achieve the effect of reducing the possibility, enhancing the firmness, and connecting firmly

Inactive Publication Date: 2020-11-10
安徽祺泰建设集团有限公司
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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that there are the following defects: the new roadbed is only connected to the original roadbed through wooden piles, which easily leads to an unstable connection between the new roadbed and the original roadbed

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  • Construction method of highway widened roadbed
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  • Construction method of highway widened roadbed

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Embodiment Construction

[0045] The following is attached Figure 1-5 The application is described in further detail.

[0046] The embodiment of the present application discloses a construction method for road widening roadbed, such as figure 1 shown, including the following steps:

[0047] Step 1. Measure and stake out the position where the original subgrade 1 needs to be widened, mark the position that needs to be widened, and excavate the slope step by step along the slope angle of the original subgrade 1, and the platforms between the slopes of all levels are gradually expanded from the road surface to the lower width. Gradual decline, the vertical height of the slope is 1-2 meters;

[0048] Step 2. Drive wooden piles with the same length as the slope on the bottom platform along the direction parallel to the slope and the direction perpendicular to the slope until the top surface of the pile is flush with the bottom platform;

[0049] Step 3, laying geogrid on the bottom platform;

[0050] S...

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Abstract

The invention relates to a highway widening roadbed construction method which comprises the following steps: step 1, measuring and setting out a to-be-widened position of an original roadbed, markingthe to-be-widened position, and digging slope surfaces step by step along the slope angle of the original roadbed; step 2, driving wood piles into the bottom-layer platform; step 3, laying geogrids onthe bottom layer platform; step 4, laying gravelly soil on the geogrids in a layered manner until the gravelly soil is flush with the surface of the previous stage of platform, and when gravel soil is laid in a layered mode, drilling a mounting groove in the side, close to the gravel soil layer, of the original roadbed, and arranging a connecting device in the mounting groove; step 5, driving thewood piles into the platform in the step 4 according to the step 2; step 6, laying geogrids laid on the platform in the step 4; 7, repeating the step 4 to step 6; and step 8, paving broken stone chips on the compacted surface, and then compacting the stone chips until the broken stone chips are flush with the surface of the original roadbed.

Description

technical field [0001] The present application relates to the technical field of road construction, in particular to a construction method for road widening subgrades. Background technique [0002] With the rapid development of our country's social economy, most of the current road functions can no longer meet the growing traffic demand of the society. Therefore, it is imperative to upgrade the original roads. The roadbed widening is the key to the reconstruction project, whether it is design or construction. [0003] Related technologies can refer to the Chinese invention patent with the authorized announcement number CN106522055B, which discloses a construction method for widening roadbeds. By making the same slope as the original roadbed on the original roadbed step by step, and then compacting it layer by layer Cross-drive wooden piles to play a supporting role in the gravel soil layer, and then lay a fixed geogrid on the surface of each layer to increase the stability ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/00E01C3/04
CPCE01C3/00E01C3/04
Inventor 杜丽丽汪冬霞
Owner 安徽祺泰建设集团有限公司
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