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Height control method for roadbed of highway in seasonal frozen region based on strength and stability

A technology of height control and seasonal freezing area, applied in the directions of roads, roads, buildings, etc., can solve the problem of lack of obvious correspondence between the height of the roadbed and the dry and wet type, and achieve the effect of eliminating adverse effects, reducing land occupation, and strong adaptability

Active Publication Date: 2018-09-28
HEILONGJIANG PROV INST OF COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to provide a seasonal freezing method based on the strength and stability of the roadbed in view of the problem that the "subgrade water content distribution and dry-wet type relationship curve" of the existing road changes, and the height of the roadbed and the dry-wet type lack a clear correspondence. The roadbed height control method of regional roads. This method proposes the representative distribution form of the water content of the roadbed and the influence of the representative distribution form on the treatment method of the roadbed, which can satisfy both the strength of the roadbed (the depth of the working area) and the stability (the height of the capillary water rise) and low temperature moisture migration) requirements

Method used

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  • Height control method for roadbed of highway in seasonal frozen region based on strength and stability
  • Height control method for roadbed of highway in seasonal frozen region based on strength and stability
  • Height control method for roadbed of highway in seasonal frozen region based on strength and stability

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specific Embodiment approach 1

[0058] Specific implementation mode one: what this implementation mode records is a kind of height control method of highway subgrade in seasonally frozen area based on strength and stability, and the concrete steps of described method are:

[0059] Step 1: Confirm the natural division and filling soil quality of the roadbed;

[0060] Step 2: Confirm the state of the foundation. If the foundation is wet and soft, treatment measures (such as replacement, drainage consolidation, geogrid, mixing pile, etc.) should be selected for treatment, and the subgrade can be built after treatment;

[0061] Step 3: According to the natural division and filling soil confirmed in Step 1, and according to the reference value of the critical height of the subgrade recommended by the code, initially select the height of the subgrade based on the reference value of the critical height;

[0062] Step 4: According to the type of zone where the subgrade is located, determine the dominant source of mo...

specific Embodiment approach 2

[0073] Embodiment 2: A method for controlling the height of subgrades in seasonally frozen regions based on strength and stability described in Embodiment 1. In step 2, when the ground state is wet and soft, corresponding treatment measures need to be taken The treatment measures mentioned are filling, drainage consolidation, geogrid, mixing pile or stabilization treatment, etc.

specific Embodiment approach 3

[0074] Specific embodiment three: a kind of method for controlling subgrade height in seasonally frozen regions based on strength and stability described in specific embodiment one, in step five, the representative distribution forms described are specifically divided into the following five situations: (1) When the main source of subgrade moisture is road surface seepage and is not significantly affected by groundwater or surface water, the water content in the upper part of the subgrade has an S-shaped distribution; (2) When the main source of subgrade moisture is pavement seepage and is affected by groundwater or surface water , the water content in the upper part of the subgrade is a C-type distribution; (3) when the main sources of water are groundwater and surface water, the water content in the upper part of the subgrade is a type-A distribution; when the impact of gaseous water migration to the cold front is significant, it is B-type, D-type distribution; (4) When the s...

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Abstract

The invention a height control method for a roadbed of a highway in a seasonal frozen region based on strength and stability, and belongs to the technical field of highway roadbed pavement design. Theheight control method comprises the steps that natural regionalization where the roadbed of the highway is located and the property of filled earth are determined; the state of a foundation is determined, and if the foundation is wet and soft, treatment is conducted; according to the natural regionalization and the property of the filled earth, the critical height reference value of the roadbed is recommended, and the height of the roadbed based on 'the critical height reference value' is selected preliminarily; main sources of moisture in the built roadbed are judged, the representative distribution form of the moisture content of the roadbed is judged, and the roadbed treatment mode is selected; the height of the roadbed is controlled according to the rising height of capillary water; the height of the roadbed is controlled according to the depth of a working area of the roadbed; according to the representative distribution form of the moisture content of the roadbed, the control reference value of the preliminarily-selected roadbed height is evaluated; when urgent problems are involved, comprehensive measurement is needed to determine the height of the roadbed; and it is appropriate to adopt pavement structure drainage, stabilizing treatment, filling replacing or an isolating layer and take 'the roadbed height controlled according to the depth of the working area of the roadbed' as reference control.

Description

technical field [0001] The invention belongs to the technical field of highway subgrade and pavement design, and in particular relates to a method for controlling the height of highway subgrade in seasonally frozen regions based on strength and stability, which is mainly applied to the control of the height of fine-grained soil subgrade of highways in seasonally frozen regions. Background technique [0002] Relevant specifications require that the working area of ​​the highway subgrade is in a dry or wet state, the purpose of which is to maintain the proper strength and stability of the subgrade. For this reason, the specification gives the minimum height of the top surface of the subgrade (road bed) above the long-term water accumulation on the surface or the groundwater level, which is the reference value of the "critical height" when it is dry, medium-humid and wet, and controls it accordingly. Embankment height. [0003] According to the field surveys and observations t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C3/06
CPCE01C3/06
Inventor 高伟白义松任少辉崔巍孙巍左贵林
Owner HEILONGJIANG PROV INST OF COMM
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