CN105862534B - A kind of existing roadbed grouting consolidation effect synthetical evaluation method - Google Patents
A kind of existing roadbed grouting consolidation effect synthetical evaluation method Download PDFInfo
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- CN105862534B CN105862534B CN201610247735.3A CN201610247735A CN105862534B CN 105862534 B CN105862534 B CN 105862534B CN 201610247735 A CN201610247735 A CN 201610247735A CN 105862534 B CN105862534 B CN 105862534B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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Abstract
The invention discloses a kind of existing roadbed grouting consolidation effect synthetical evaluation methods, this method passes through the deflection value before and after measuring existing road grouting and reinforcing, and it is corrected through the closely knit situation of ground penetrating radar detection road foundation, measured flexure is enabled more accurately to characterize the intensity of roadbed, finally by modified flexure typical value reduced rate before and after calculating slip casting, and it is compared with design value and then evaluates grouting consolidation effect, while the hollowing area of ground penetrating radar detection also will be as the key area of slip casting.By the above-mentioned means, existing roadbed grouting consolidation effect synthetical evaluation method proposed by the present invention has the following advantages：On the one hand by, since the part of road surface factor is rejected, obtained flexure just can more accurately represent the intensity of roadbed, make evaluation result more accurate in flexure result；Another aspect Ground Penetrating Radar and flexure are used in combination but also slip casting has emphasis, raising consolidation effect.
Description
Technical field
The present invention relates to road rehabilitation reinforcement technique fields, compound more particularly to a kind of existing roadbed grouting consolidation effect
Evaluation method.
Background technology
Traditional road foundation grouting and reinforcing is all based on " excavation type ", and road grouting reinforcement technique is used as to existing road
The new technology of road subgrade strengthening has the characteristics that easy construction, consolidation effect are apparent.However, roadbed grouting and reinforcing belongs to hidden
Engineering, method and evaluation index in current specifications in relation to roadbed Site Detection are only limitted to newly-built road bed, therefore, how right
Existing roadbed slip casting effect carries out the technical issues of evaluation is current urgent need to resolve and a difficult point.
Existing detection method mainly includes following several：CBR at spot detects and modulus of resilience detection, deep layer nucleon density
Hygronom detection, dynamic sounding, road surface deflection value method, mark pass through experiment, scene DCP detections, plane-plate loading test and boring and coring
Detection etc..
Currently, it is domestic that the evaluation of existing roadbed grouting consolidation effect is substantially based on deflection testing, deflection testing
It is that is actually characterized is the integral strength of subgrade and pavement in the following load action depth bounds of road table.Purely use flexure typical value
Effect to characterize subgrade strengthening is inaccurate.
For existing road, deflection testing characterization is subgrade and pavement in the following load action depth bounds of road table
Integral strength.Influence deflection test in addition to temperature, season, area and road surface form and axle for vehicle load, test speed, test
Outside the external factors such as system deviation, can most influence flexure result is the intensity on roadbed and road surface, and there is presently no find this side
The correlative study in face.The present invention starting point be by flexure result since the part of road surface factor eliminates, gained
To flexure just can more accurately represent the intensity of roadbed.
Invention content
The invention mainly solves the technical problem of providing a kind of existing roadbed grouting consolidation effect synthetical evaluation methods, will
Since the part of road surface factor eliminates in flexure result, obtained flexure just can more accurately represent the strong of roadbed
Degree, evaluation result are just more accurate.
In order to solve the above technical problems, one aspect of the present invention is：A kind of existing roadbed slip casting is provided to add
Gu effect synthetical evaluation method, including following specific steps：
First, before slip casting：
(11), area's point layout is surveyed；
(12), deflection testing before slip casting obtains the deflection value of each measuring point；
(13), Ground Penetrating Radar test is carried out for the measuring point of flexure exception, determines the closely knit journey of flexure abnormal area roadbed
Degree is if testing result shows that roadbed is closely knit and deflection value is still larger, then straight by the point data in follow-up formula calculating process
It connects and casts out, while make marks to roadbed hollowing region, as emphasis reinforcing area；Density of roadbed is shown as Ground Penetrating Radar detects
Not enough, then the point data retains in follow-up calculate；
(14), flexure typical value before slip casting is calculated by formula；
2nd, after slip casting maintenance is qualified：
(21), area's point layout is surveyed；
(22), deflection testing after slip casting obtains the deflection value of each measuring point；
(23), Ground Penetrating Radar test is carried out for the measuring point of flexure exception, determines the closely knit journey of flexure abnormal area roadbed
Degree is if testing result shows that roadbed is closely knit and deflection value is still larger, then straight by the point data in follow-up formula calculating process
It connects and casts out, while also make marks to roadbed hollowing region, as multiple note region；Density of roadbed is shown as Ground Penetrating Radar detects not
Enough, then the point data retains in follow-up calculate；
(24), flexure typical value after slip casting is calculated by formula；
3rd, flexure reduced rate is calculated by flexure typical value after flexure typical value before slip casting and slip casting。
In a preferred embodiment of the present invention, flexure typical value before slip casting is calculated as followsWith it is curved after slip casting
Heavy typical value：
In formula：
--- actual measurement flexure typical value（0.01mm）；
,--- actual measurement flexure average value（0.01mm）With mean square deviation（0.01mm）；
--- ensure rate coefficient, highway takes 1.645 with Class I highway, other highways take 1.5；
--- seasonal effect coefficient, according to local empirically determined；
--- humidity correction factor, according to local empirically determined；
--- temperature correction coefficient, temperature correction：It can be according to《Highway subgrade road surface on-the-spot test regulation》In
Regulation is carried out or is illustrated according to provision or local field data is modified；
Flexure reduced rate is calculated as follows：
In formula：
--- flexure typical value reduced rate（%）；
--- flexure typical value before slip casting（0.01mm）；
--- flexure typical value after slip casting（0.01mm）；
The flexure reduced rate being calculated is compared with design value, and it is then qualification to meet design requirement, is unsatisfactory for design requirement
It need to note again.
In a preferred embodiment of the present invention, before slip casting after the position of each measuring point and slip casting each measuring point cloth set
Put can it is identical can not also be identical.
In a preferred embodiment of the present invention, deflection testing uses Benkleman beam deflectometer.
In a preferred embodiment of the present invention, when arranging measuring point a measuring point is arranged every 20 ~ 50m.
In a preferred embodiment of the present invention, point layout quantity is more than or equal to 20.
In a preferred embodiment of the present invention, the measuring point of flexure exception refer to the flexure point measured value >=,AndFor before not casting out part measuring point data all measuring points survey flexure average value and
Standard deviation.
The invention has the advantages that：
1st, develop a kind of evaluation method of roadbed grouting and reinforcing, by flexure result since the part of road surface factor is picked
Except going out, obtained flexure just can more accurately represent the intensity of roadbed, and evaluation result is just more accurate；
2nd, Ground Penetrating Radar predominantly detects flexure abnormal area, greatly reduces workload, improves work efficiency；
3rd, flexure and using for Ground Penetrating Radar enable the weak link of road foundation to be rapidly found out, and slip casting is more directed to
Property, improve consolidation effect.
Specific embodiment
The technical solution in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example is only the part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
All other embodiment that technical staff is obtained without making creative work belongs to the model that the present invention protects
It encloses.
The embodiment of the present invention includes：
A kind of existing roadbed grouting consolidation effect synthetical evaluation method, including following specific steps：
First, before slip casting：
(11), area's point layout is surveyed；
(12), deflection testing before slip casting obtains the deflection value of each measuring point；
(13), Ground Penetrating Radar test is carried out for the measuring point of flexure exception, determines the closely knit journey of flexure abnormal area roadbed
Degree is if testing result shows that roadbed is closely knit and deflection value is still larger, then straight by the point data in follow-up formula calculating process
It connects and casts out, while make marks to roadbed hollowing region, as emphasis reinforcing area；Density of roadbed is shown as Ground Penetrating Radar detects
Not enough, then the point data retains in follow-up calculate；
(14), flexure typical value before slip casting is calculated by formula；
2nd, after slip casting maintenance is qualified：
(21), area's point layout is surveyed；
(22), deflection testing after slip casting obtains the deflection value of each measuring point；
(23), Ground Penetrating Radar test is carried out for the measuring point of flexure exception, determines the closely knit journey of flexure abnormal area roadbed
Degree is if testing result shows that roadbed is closely knit and deflection value is still larger, then straight by the point data in follow-up formula calculating process
It connects and casts out, while also make marks to roadbed hollowing region, as multiple note region；Density of roadbed is shown as Ground Penetrating Radar detects not
Enough, then the point data retains in follow-up calculate；
(24), flexure typical value after slip casting is calculated by formula；
3rd, flexure reduced rate is calculated by flexure typical value after flexure typical value before slip casting and slip casting。
The measuring point of flexure exception in above-mentioned steps refer to the flexure point measured value >=,
AndFlexure average value and standard deviation are surveyed for all measuring points before not casting out part measuring point data.
Flexure typical value before slip casting is calculated as followsWith flexure typical value after slip casting：
In formula：
--- actual measurement flexure typical value（0.01mm）；
,--- actual measurement flexure average value（0.01mm）With mean square deviation（0.01mm）；
--- ensure rate coefficient, highway takes 1.645 with Class I highway, other highways take 1.5；
--- seasonal effect coefficient, according to local empirically determined；
--- humidity correction factor, according to local empirically determined；
--- temperature correction coefficient, temperature correction：It can be according to《Highway subgrade road surface on-the-spot test regulation》In
Regulation is carried out or is illustrated according to provision or local field data is modified；
Flexure reduced rate is calculated as follows：
In formula：
--- flexure typical value reduced rate（%）；
--- flexure typical value before slip casting（0.01mm）；
--- flexure typical value after slip casting（0.01mm）；
The flexure reduced rate being calculated is compared with design value, and it is then qualification to meet design requirement, is unsatisfactory for design requirement
It need to note again.
It is a concrete engineering case below：
Jiangsu city secondary distributor road is two-way four-lane, and road grouting and reinforcing segment length is about 250m, and work done in the manner of a certain author is 2 evaluations
Unit arranges a measuring point with 20m, and here is the deflection data of one of evaluation unit.Flexure subtracts after design requirement slip casting
Low rate is more than 30% for qualification, while requires after slip casting road surface that cannot have and significantly arch upward.
In present case, which is city subsidiary road, ensures rate coefficient1.5 are taken, Deflection Correction Coefficient before slip casting、It is 1, the temperature of asphalt surface course is 27.3 DEG C during detection, temperature correction coefficient of tabling look-up to obtainIt is 0.9；When being detected after slip casting
Asphalt surface course temperature is 20.7 DEG C, correction factor、WithIt does not correct, is 1.
The evaluation unit, flexure eyeball number 26 before slip casting, according to claim 7 exceptional data point decision principle, i.e.,
The flexure point measured value >=For flexure abnormal point, hereinAndFor the evaluation unit flexure
Actual measurement flexure average value and standard deviation before not being modified.According to the principle, it is 6 to obtain abnormal point numerical, this 6 points are carried out
Ground Penetrating Radar is tested, and has 5 point position roadbeds hollowing occur, 1 roadbed is closely knit, casts out this closely knit 1 point of roadbed on principle
Flexure, averages to remaining data and standard deviation, calculates flexure typical value and goes forward side by side and obtains 88.79 after trip temperature amendment
（0.01mm）, simultaneously, these abnormal areas are made with label, the region will be used as slip casting emphasis during slip casting.
Similarly, evaluation unit flexure actual measurement points 28 after slip casting, are judged, have obtained 6 as procedure described above
Abnormal point, but Ground Penetrating Radar shows that roadbed is closely knit below 5 points, showing this 5 flexures is caused by road surface extremely, according to
Decision principle will cast out 5 points, average to remaining deflection data and standard deviation, calculate flexure typical value and go forward side by side trip temperature
30.99 are obtained after amendment（0.01mm）.
The reduced rate of flexure typical value is 100%* before and after slip casting（88.79-30.99）/88.79=65.1%>30% satisfaction is set
Meter requirement.To ensure construction quality, flexure abnormal area will carry out after-teeming slurry.
The foregoing is merely the embodiment of the present invention, are not intended to limit the scope of the invention, every to utilize this hair
The equivalent structure or equivalent flow shift that bright description is made directly or indirectly is used in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (5)
1. a kind of existing roadbed grouting consolidation effect synthetical evaluation method, which is characterized in that including following specific steps：
First, before slip casting：
(11), area's point layout is surveyed；
(12), deflection testing before slip casting obtains the deflection value of each measuring point；
(13), Ground Penetrating Radar test is carried out for the measuring point of flexure exception, determines the compaction rate of flexure abnormal area roadbed, such as
Testing result shows that roadbed is closely knit and deflection value is still larger, then directly gives up the point data in follow-up formula calculating process
It goes, while makes marks to roadbed hollowing region, as emphasis reinforcing area；Density of roadbed is shown as Ground Penetrating Radar detects not
Enough, then the point data retains in follow-up calculate；
(14), flexure typical value before slip casting is calculated by formula；
2nd, after slip casting maintenance is qualified：
(21), area's point layout is surveyed；
(22), deflection testing after slip casting obtains the deflection value of each measuring point；
(23), Ground Penetrating Radar test is carried out for the measuring point of flexure exception, determines the compaction rate of flexure abnormal area roadbed, such as
Testing result shows that roadbed is closely knit and deflection value is still larger, then directly gives up the point data in follow-up formula calculating process
It goes, while also makes marks to roadbed hollowing region, as multiple note region；Show that density of roadbed is inadequate as Ground Penetrating Radar detects,
Then the point data retains in follow-up calculate；
(24), flexure typical value after slip casting is calculated by formula；
3rd, flexure reduced rate is calculated by flexure typical value after flexure typical value before slip casting and slip casting；
When arranging measuring point a measuring point is arranged every 20 ~ 50m.
2. existing roadbed grouting consolidation effect synthetical evaluation method according to claim 1, which is characterized in that by following public affairs
Formula calculates flexure typical value before slip castingWith flexure typical value after slip casting：
In formula：
--- actual measurement flexure typical value（0.01mm）；
,--- actual measurement flexure average value（0.01mm）With mean square deviation（0.01mm）；
--- ensure rate coefficient, highway takes 1.645 with Class I highway, other highways take 1.5；
--- seasonal effect coefficient, according to local empirically determined；
--- humidity correction factor, according to local empirically determined；
--- temperature correction coefficient, temperature correction：According to《Highway subgrade road surface on-the-spot test regulation》In regulation into
Row illustrates or local field data is modified according to provision；
Flexure reduced rate is calculated as follows：
In formula：
--- flexure typical value reduced rate（%）；
--- flexure typical value before slip casting（0.01mm）；
--- flexure typical value after slip casting（0.01mm）；
The flexure reduced rate being calculated is compared with design value, and it is then qualification to meet design requirement, and being unsatisfactory for design requirement need to answer
Note.
3. existing roadbed grouting consolidation effect synthetical evaluation method according to claim 1, which is characterized in that deflection testing
Using Beckman beam type benkelman beams deflectometer or drop hammer deflection meter.
4. existing roadbed grouting consolidation effect synthetical evaluation method according to claim 1, which is characterized in that point layout
Quantity is more than or equal to 20.
5. existing roadbed grouting consolidation effect synthetical evaluation method according to claim 1, which is characterized in that flexure is abnormal
Measuring point refer to the flexure point measured value >=,AndFor before not casting out part measuring point data
All measuring points actual measurement flexure average value and standard deviation.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261263A (en) * | 2007-03-09 | 2008-09-10 | 郑州大学 | Roadbed defect recognition and high polymer grouting rapid reinforcement technology |
| CN101261265A (en) * | 2007-03-09 | 2008-09-10 | 郑州大学 | Cement concrete road surface void identification and high polymer grouting rapid servicing technology |
| KR20110135166A (en) * | 2010-06-10 | 2011-12-16 | (주)바우테크 | Repairing method of pavement sunken |
| CN103790188A (en) * | 2014-01-10 | 2014-05-14 | 天津市市政工程研究院 | Method for evaluating roadbed grouting reinforcement effects |
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- 2016-04-20 CN CN201610247735.3A patent/CN105862534B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101261263A (en) * | 2007-03-09 | 2008-09-10 | 郑州大学 | Roadbed defect recognition and high polymer grouting rapid reinforcement technology |
| CN101261265A (en) * | 2007-03-09 | 2008-09-10 | 郑州大学 | Cement concrete road surface void identification and high polymer grouting rapid servicing technology |
| KR20110135166A (en) * | 2010-06-10 | 2011-12-16 | (주)바우테크 | Repairing method of pavement sunken |
| CN103790188A (en) * | 2014-01-10 | 2014-05-14 | 天津市市政工程研究院 | Method for evaluating roadbed grouting reinforcement effects |
Non-Patent Citations (1)
| Title |
|---|
| "唐津高速公路路基压密注浆加固效果的研究";沈可;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;20100115;第7.2节 * |
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