CN101387096A - Control method of stable road bed for express highway filling - Google Patents
Control method of stable road bed for express highway filling Download PDFInfo
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- CN101387096A CN101387096A CNA2007101539067A CN200710153906A CN101387096A CN 101387096 A CN101387096 A CN 101387096A CN A2007101539067 A CNA2007101539067 A CN A2007101539067A CN 200710153906 A CN200710153906 A CN 200710153906A CN 101387096 A CN101387096 A CN 101387096A
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Abstract
The invention provides a method for controlling the stable roadbed filling of highways, which is mainly used in the layered filling construction of highway roadbeds. The method uses deflection value indexes to control roadbed filling quality in time and guarantee the reliability of quality control indexes so as to ensure the roadbed stability. Particularly, the method can greatly reduce the destruction of highway pavement because of highway roadbed subsidence especially during the operation period of highways. The method adopts a technical proposal that when a filling roadbed has different depths, low-dose cement stabilized soil or lime stabilized soil is adopted to perform layered compaction, and when the load is 50 KN after seven days, a drop-hammer type deflectograph (FWD) is used to ensure that the deflection value of a roadbed top surface (1) is between 0.80 and 1.20 millimeters; the deflection value of an upper embankment top surface (2) is between 1.20 and 1.50 millimeters; the deflection value of an upper embankment bottom surface (3) is between 1.50 and 1.80 millimeters; and the deflection value of a lower embankment bottom surface (4) is between 1.80 and 2.20 millimeters.
Description
One, technical field:
The present invention relates to a kind of control method of stable road bed for express highway filling, it is mainly used in express highway roadbed placement in layers is built, come the roadbed filling quality is in time controlled and the reliability of the control index of ensuring the quality of products with the deflection value index, thereby guarantee the stable of roadbed.
Two, background technology:
Newly-built express highway roadbed instability is the major issue of being concerned about in the industry, the speedway instability problems such as just occurring subgrade settlement soon that is open to traffic.Because the quality control index of the original material of express highway filling roadbed material and roadbed bottom, in whole construction and road service process, can change along with the variation of factors such as ambient moisture, temperature and load, so the physical property of express highway roadbed filler itself (grain composition, rate of decay and moisture content etc.), construction technology and Construction Quality Control index have uncertainty, have caused the roadbed of different fillers that there is very big influence in the express highway roadbed life-span.To express highway roadbed Construction Quality Control, present standard adopts degree of compaction to control, and in " highway subgrade construction technique normalizing (JTGF10-2006) ", the soil subgrade compacting criteria is controlled according to 96 districts, 94 districts, 93 districts; The embankment degree of compaction adopts porosity 23 districts, 25 districts of filler to control for rockfilling up and down.With coarse-grained soils such as gravelly soils, sandy soil during as roadbed filling, though roadbed filling is less to the influence of ambient moisture, after the compacting index stability better because the complexity that on-the-spot material is formed, the scene really can be controlled the degree of compaction index and then be difficult for; During for usefulness fine grained soils Filling Expressway Subgrade, the degree of compaction index is more easy to control with respect to coarse-grained soil, but fine grained soils is bigger to the influence of ambient moisture, and degree of compaction index relative stability is relatively poor, and when running into unfavourable season, obvious sedimentation will take place roadbed.Therefore, solve the problem of above appearance, must study the detection and the control method of express highway roadbed construction quality stability indicator.
Three, content of the present invention:
The objective of the invention is, in order to solve the weak point in the above-mentioned background technology, the road foundation that a kind of method is simple, easy to use, reliability is higher quality checking and controlling method is provided, can be used for the mensuration of newly-built speedway filler roadbed quality control, the quality of field engineering more easy to control.
Four, the specific embodiment of the present invention:
The concrete enforcement of a kind of control method of stable road bed for express highway filling is as follows:
When being 50KN, load measures roadbed deflection value size respectively with Falling Weight Deflectometer (FWD).
In the following 40-80cm thickness range of roadbed end face (1), can adopt low dosage (cement dosage 3-5%, lime dosage 6-10%) cement stabilizing great soil group or lime stabilization great soil group to carry out compaction in layers, make the deflection value of roadbed end face (1) reach 0.80-1.20mm at 7 days later on.
In the following 40-60cm thickness range of levee crown face (2) of setting out on a journey, can adopt low dosage (cement dosage 3-5%, lime dosage 6-10%) cement stabilizing great soil group or lime stabilization great soil group to carry out compaction in layers, make the deflection value of the levee crown face (2) of setting out on a journey reach 1.20-1.50mm at 7 days later on.
In the following following 40-60cm thickness range of embankment end face (3), can adopt low dosage (cement dosage 3-5%, lime dosage 6-10%) cement stabilizing great soil group, lime stabilization great soil group to carry out compaction in layers, made the deflection value of following embankment end face (3) reach 1.50-1.80mm later at 7 days, perhaps with making down the deflection value of embankment end face (3) reach 1.50-1.80mm after sand gravel, the building stones placement in layers compacting.
In the following 30-60cm thickness range in following embankment bottom surface (4), can adopt low dosage (cement dosage 3-5%, lime dosage 6-10%) cement stabilizing great soil group, lime stabilization great soil group to carry out compaction in layers, made down later on the deflection value of embankment bottom surface (4) reached 1.80-2.20mm at 7 days.
Accompanying drawing is seen in each layer detection position.
Claims (3)
1, a kind of control method of stable road bed for express highway filling is characterized in that: in express highway roadbed placement in layers is built, adopt four deflection value indexs matrix amount of satisfying the need to control at least.
2, four of control roadbed according to claim 1 deflection value indexs is characterized in that: the roadbed end face (1) and the levee crown face (2) of setting out on a journey, last embankment bottom surface (3) and following embankment bottom surface (4) deflection value index.
3, four of control roadbed according to claim 1 deflection value indexs is characterized in that: roadbed end face (1) deflection value is 0.80-1.20mm, levee crown face (2) deflection value of setting out on a journey is 1.20-1.50mm, go up embankment bottom surface (3) deflection value is that 1.50-1.80mm and following embankment bottom surface (4) deflection value are 1.80-2.20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101539067A CN101387096A (en) | 2007-09-13 | 2007-09-13 | Control method of stable road bed for express highway filling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101539067A CN101387096A (en) | 2007-09-13 | 2007-09-13 | Control method of stable road bed for express highway filling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101387096A true CN101387096A (en) | 2009-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101539067A Pending CN101387096A (en) | 2007-09-13 | 2007-09-13 | Control method of stable road bed for express highway filling |
Country Status (1)
| Country | Link |
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| CN (1) | CN101387096A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031743A (en) * | 2010-12-17 | 2011-04-27 | 河南省新开元路桥工程咨询有限公司 | Construction method of mudstone-filled embankment |
| CN108560345A (en) * | 2018-05-04 | 2018-09-21 | 刘刚 | Road construction pretreatment unit and its construction method |
-
2007
- 2007-09-13 CN CNA2007101539067A patent/CN101387096A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031743A (en) * | 2010-12-17 | 2011-04-27 | 河南省新开元路桥工程咨询有限公司 | Construction method of mudstone-filled embankment |
| CN108560345A (en) * | 2018-05-04 | 2018-09-21 | 刘刚 | Road construction pretreatment unit and its construction method |
| CN108560345B (en) * | 2018-05-04 | 2020-08-07 | 绍兴市尊铖自动化设备有限公司 | Road construction pretreatment device and construction method thereof |
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Open date: 20090318 |