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Self-compacting cement soil widening roadbed and construction method

A construction method and cement-soil technology, applied in the field of geotechnical engineering, can solve problems such as difficult popularization and application, difficult control of backfill quality, etc.

Pending Publication Date: 2020-10-30
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in filling projects such as roadbed widening, the quality of backfilling is not easy to control, and it is difficult to popularize and apply

Method used

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  • Self-compacting cement soil widening roadbed and construction method
  • Self-compacting cement soil widening roadbed and construction method
  • Self-compacting cement soil widening roadbed and construction method

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Embodiment Construction

[0027] Such as figure 1 and figure 2 , the present invention proposes a self-compacting cement-soil widened subgrade, including an old subgrade 1, a new subgrade 2, a throttling block wall 3, a subgrade surface layer 4 and a drainage unit; the cross section of the old subgrade 1 to be widened The edge on one side is stepped; the throttling block wall 3 is laid on the side of the old roadbed 1 to be widened; the new roadbed 2 is filled on the old roadbed 1 to be widened and the section The self-compacting cement soil between flow block walls 3. The stepped edge of the old subgrade 1 increases the contact area between the edge of the old subgrade 1 and the self-compacting cement-soil of the new subgrade 2, making the edge of the old subgrade 1 and the self-compacting cement-soil of the new subgrade 2 horizontally and vertically Direction, forming a force-bearing contact surface in two directions, the connection between the edge of the old roadbed 1 and the new roadbed 2 is st...

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PUM

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Abstract

The invention provides a self-compacting cement soil widening roadbed and a construction method. The self-compacting cement soil widening roadbed comprises an old roadbed, a new roadbed, a throttlingbuilding block wall body and a roadbed surface layer, wherein the edge of one side to be widened of a cross section of the old roadbed is step-shaped; the throttling building block wall body is laid on the side, to be widened, of the old roadbed; the new roadbed is self-compacting cement soil filled between the one side to be widened of the old roadbed and the throttling building block wall body;the roadbed surface layer is paved on the top end surfaces of the old roadbed and the new roadbed; and top three-way geogrids are arranged between the top end surfaces of the old roadbed and the new roadbed and the roadbed surface layer. The connection between the edge of the old roadbed and the new roadbed is firmer, and differential settlement of the old roadbed and the new roadbed is prevented;and excavation spoil and engineering spoil are reasonably utilized, and resource high efficiency and environmental friendliness are achieved.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a self-compacting cement-soil widened subgrade and a construction method. Background technique [0002] The disposal of engineering spoils lacks planning and implementation plans, which not only causes waste of land resources, but also wastes transportation and storage costs. Therefore, the diversified consumption methods of spoil need to be perfected and innovated urgently, so as to make full and effective use of it as a resource. Self-compacting cement soil is a fluid backfill reinforcement material formed by mixing engineering spoil with a certain proportion of curing agent and cement, and fully stirring it through special machinery. It has been widely used in soft soil foundation treatment engineering. [0003] However, in filling projects such as subgrade widening, the quality of backfilling is not easy to control, and it is difficult to popularize and app...

Claims

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Application Information

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IPC IPC(8): E01C3/00E01C3/04E02D3/00E02D3/10E02D29/02
CPCE01C3/00E01C3/006E01C3/04E02D3/005E02D3/10E02D29/025E02D2300/0084
Inventor 高玉峰叶至韬张飞周云东严柏杨张燚葛彬舒爽李亮亮
Owner HOHAI UNIV