CN112359698A - Construction method for quickly repairing roadbed by grouting - Google Patents
Construction method for quickly repairing roadbed by grouting Download PDFInfo
- Publication number
- CN112359698A CN112359698A CN202011512990.9A CN202011512990A CN112359698A CN 112359698 A CN112359698 A CN 112359698A CN 202011512990 A CN202011512990 A CN 202011512990A CN 112359698 A CN112359698 A CN 112359698A
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- Prior art keywords
- grouting
- elastic modulus
- dynamic elastic
- time
- point
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Classifications
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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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
- E01C23/0966—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving
-
- 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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
- E01C23/0966—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving
- E01C23/0973—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving with liquid or semi-liquid materials, e.g. crack sealants
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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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/10—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for raising or levelling sunken paving; for filling voids under paving; for introducing material into substructure
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
A construction method for grouting and rapid repairing of a road foundation comprises the following steps: (1) determining a roadbed to be repaired, selecting reference points at different positions and depths, and determining a dynamic elastic modulus normalization value time relation curve of the different reference points; (2) grouting and repairing the grouting points of the roadbed to be repaired; (3) detecting a first dynamic elastic modulus at a first time after grouting; (4) detecting a second dynamic elastic modulus at a second time after the grouting; (5) calculating an expected dynamic elastic modulus at a third time after grouting according to the dynamic elastic modulus normalized value time relation curve, the first dynamic elastic modulus and the second dynamic elastic modulus; (6) judging whether the expected dynamic elastic modulus is greater than a threshold value, and if so, finishing the repair of the grouting point; and if the grouting point is smaller than the threshold value, re-injecting the grouting point.
Description
Technical Field
The invention relates to a roadbed repairing construction method, in particular to a road roadbed grouting reinforcement repairing construction method.
Background
The roadbed is an important component of the highway and is responsible for bearing various loads transmitted by the road surface, so that the strength, stability and durability of the roadbed are important guarantees for safe and effective operation of the highway. In the highway operation process, under the influence of natural environment and the repeated action of driving load, various performances of the roadbed can be gradually reduced. In recent years, with the increasing of traffic volume and vehicle axle load and the influence of some remaining problems in design and construction, highway subgrade diseases are frequent.
The grouting reinforcement repair technology is characterized in that a grouting pipe is drilled and implanted in a road, grout is extruded into a plus body and a minus body through certain grouting pressure, surrounding soil bodies are filled or compressed, and the compactness and the bearing capacity of the soil bodies are improved. The application of the grouting reinforcement technology in road construction and maintenance engineering provides an effective solution for the problem of road operation subgrade diseases. The technology is adopted to maintain and treat the diseases such as road settlement and the like in the operation period, avoids large filling and large digging, has the characteristics of simple construction process, small interference to traffic operation and the like, ensures the safety, comfort and smoothness of highway operation, and has lower maintenance and reinforcement cost.
However, the grouting reinforcement technology for roads has many problems, namely, the high polymer grouting material is fast and early strong, is instantly condensed and solidified, does not need to be maintained, but is expensive, low in strength and greatly influenced by geological and climatic conditions in grouting effect. The cement-based grouting material has high strength, good impermeability, wide raw material source, low cost and simple grouting process, is a grouting material which is widely applied and rapidly developed in the field of road engineering at present, but has long solidification and maintenance time and is not beneficial to rapidly opening traffic; if the grouting effect is not achieved after solidification and maintenance, grouting needs to be supplemented, and the construction time is further prolonged.
Prior art documents: CN 103790188A.
Disclosure of Invention
The invention provides a rapid repair construction method for road bed grouting, which can rapidly determine the grouting effect of a cement-based grouting material, so that grouting can be timely supplemented when the effect is insufficient, and the grouting reinforcement construction time of a road bed is shortened.
As one aspect of the present invention, there is provided a construction method for rapid repair of a road foundation by grouting, comprising: (1) determining a roadbed to be repaired, selecting reference points at different positions and depths, and determining a dynamic elastic modulus normalization value time relation curve of the different reference points; (2) grouting and repairing the grouting points of the roadbed to be repaired; (3) detecting a first dynamic elastic modulus at a first time after grouting; (4) detecting a second dynamic elastic modulus at a second time after the grouting; (5) calculating an expected dynamic elastic modulus at a third time after grouting according to the dynamic elastic modulus normalization value time relation curve obtained in the step (1), the first dynamic elastic modulus and the second dynamic elastic modulus; (6) judging whether the expected dynamic elastic modulus is greater than a threshold value, and if so, finishing the repair of the grouting point; and if the grouting point is smaller than the threshold value, returning to the step (2) to perform re-injection of the grouting point.
And (2) in the step (1), detecting the road surface through the drop weight deflectometer and the ground penetrating radar, and determining the roadbed to be repaired.
In the step (1), a dynamic elastic modulus normalized value time relation curve of the reference point is determined by the following method: grouting the datum point, and detecting the dynamic elastic modulus of the datum point at the first time, the dynamic elastic modulus at the second time and the dynamic elastic modulus at the third time after grouting; normalizing the dynamic elastic modulus at the first time, the dynamic elastic modulus at the second time and the dynamic elastic modulus at the third time on the basis of the dynamic elastic modulus of the datum point which is not subjected to grouting; and fitting the normalized dynamic elastic modulus at the first time, the normalized dynamic elastic modulus at the second time and the normalized dynamic elastic modulus at the third time with time to obtain a normalized dynamic elastic modulus value time relation curve.
The roadbed grouting material is cement slurry.
Preferably, the dynamic elastic modulus of the test spots is measured by a drop weight deflectometer.
The first time period is 24 hours, the second time period is 48 hours, and the third time period is 168 hours.
In the step (5), calculating the sum of the dynamic elastic modulus of the grouting point at the first time and the second time in normalization and the Euclidean distance of the corresponding time point on different dynamic elastic modulus normalization value time relation curves, and determining the dynamic elastic modulus normalization value time relation curve with the minimum sum of the Euclidean distances as the most similar dynamic elastic modulus normalization value time relation curve; and determining the expected dynamic elastic modulus of the grouting point at the third time according to the most similar normalized dynamic elastic modulus value time relation curve and the dynamic elastic modulus of the grouting point when the grouting point is not grouted: e3f=E0f×VtIn which V istA normalized dynamic elastic modulus value corresponding to the third time of the most similar normalized dynamic elastic modulus value time relation curve, E0fThe dynamic elastic modulus of the grouting point when no grouting is performed.
In the step (6), the threshold is a fixed value, and the fixed value is determined according to the road quality requirement.
Optionally, in the step (6), the threshold is determined according to the initial dynamic elastic modulus of the grouting point, and the threshold is obtained by multiplying the initial dynamic elastic modulus of the grouting point by a repair coefficient.
Optionally, the repair coefficient is set to be 1.15-1.2.
Detailed Description
The following embodiments of the present invention will be described in detail with reference to the accompanying examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.
The invention provides a construction method for quickly repairing and grouting a road subgrade, which can quickly determine the grouting effect of a cement-based grouting material, so that grouting can be timely supplemented when the effect is insufficient, and the construction time for grouting and reinforcing the road subgrade is shortened, and comprises the following steps:
(1) determining a roadbed to be repaired, selecting reference points at different positions and depths, and determining a dynamic elastic modulus normalization value time relation curve of the different reference points.
And detecting the road surface through a drop hammer type deflectometer and a ground penetrating radar, and determining the roadbed to be repaired. And selecting positions with certain intervals on the roadbed to be repaired as grouting points. And selecting grouting points with different positions and grouting depths as datum points for the determined grouting points, wherein the number of the datum points can be selected to be 10-15, for example. Determining a normalized value time dependence curve of the dynamic elastic modulus of the reference point by: grouting the datum point, wherein a grouting material can be cement slurry, cement can be ordinary portland cement or cement slurry doped with fly ash, and detecting the dynamic elastic modulus of the datum point at the first time, the dynamic elastic modulus at the second time and the dynamic elastic modulus at the third time after grouting; normalizing the dynamic elastic modulus at the first time, the dynamic elastic modulus at the second time and the dynamic elastic modulus at the third time on the basis of the dynamic elastic modulus of the datum point which is not subjected to grouting; and performing least square fitting on the dynamic elastic modulus at the first time, the second time and the third time of normalization of the reference point, which are respectively a vertical coordinate, a horizontal coordinate and an initial coordinate (0, 1) of the reference point, by using a polynomial to obtain a dynamic elastic modulus normalization value time relation curve. And fitting data of reference points at different depths and positions to obtain different dynamic elastic modulus normalization value time relation curves. The first time may be 1d, the second time may be 2d, and the third time may be 7-14 d.
(2) Grouting and repairing the grouting points of the roadbed to be repaired; (3) detecting a first dynamic elastic modulus at a first time after grouting; (4) the second dynamic elastic modulus is measured at a second time after the grouting.
And (3) grouting reinforcement repair is carried out on the grouting points needing repair in the same way as the datum points, and the initial dynamic elastic modulus of the non-datum points and the dynamic elastic modulus at the first time and the second time are detected.
(5) And (3) calculating an expected dynamic elastic modulus at a third time after grouting at a grouting point according to the dynamic elastic modulus normalized value time relation curve obtained in the step (1), the first dynamic elastic modulus and the second dynamic elastic modulus.
Calculating the sum of the dynamic elastic modulus of the first time and the second time normalized by the grouting point and the Euclidean distance of the corresponding time point on the different dynamic elastic modulus normalized value time relation curves obtained in the step (1), and determining the dynamic elastic modulus normalized value time relation curve with the minimum sum of the Euclidean distances as the most similar dynamic elastic modulus normalized value time relation curve; and determining the expected dynamic elastic modulus of the grouting point at the third time according to the most similar normalized dynamic elastic modulus value time relation curve and the dynamic elastic modulus of the grouting point when the grouting point is not grouted: e3f=E0f×VtIn which V istThe third time of the time relation curve of the most similar dynamic elastic modulus normalized valueCorresponding normalized dynamic elastic modulus value, E0fThe dynamic elastic modulus of the grouting point when no grouting is performed.
(6) Judging whether the expected dynamic elastic modulus is greater than a threshold value, and if so, finishing the repair of the grouting point; and if the grouting point is smaller than the threshold value, returning to the step (2) to perform re-injection of the grouting point.
Judging whether the expected dynamic elastic modulus is greater than a threshold value, if so, indicating that the repairing effect of the grouting point is in line with the expectation, and ending the repairing of the grouting point; if the value is smaller than the threshold value, the repairing effect of the grouting point is not good, and the step (2) is returned to carry out re-injection of the grouting point. The threshold may be a fixed value, and the fixed value is determined according to the road quality requirement. The optional threshold value is determined according to the initial dynamic elastic modulus of the grouting point, and the threshold value can be set to be the product of the initial dynamic elastic modulus of the grouting point and a repair coefficient, wherein the repair coefficient can be set to be 1.15-1.2.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. A construction method for grouting and rapid repairing of a road foundation comprises the following steps: (1) determining a roadbed to be repaired, selecting reference points at different positions and depths, and determining a dynamic elastic modulus normalization value time relation curve of the different reference points; (2) grouting and repairing the grouting points of the roadbed to be repaired; (3) detecting a first dynamic elastic modulus at a first time after grouting; (4) detecting a second dynamic elastic modulus at a second time after the grouting; (5) calculating an expected dynamic elastic modulus at a third time after grouting according to the dynamic elastic modulus normalization value time relation curve obtained in the step (1), the first dynamic elastic modulus and the second dynamic elastic modulus; (6) judging whether the expected dynamic elastic modulus is greater than a threshold value, and if so, finishing the repair of the grouting point; and if the grouting point is smaller than the threshold value, returning to the step (2) to perform re-injection of the grouting point.
2. The grouting rapid repair construction method for the road subgrade according to claim 1, which is characterized in that: and (2) in the step (1), detecting the road surface through the drop weight deflectometer and the ground penetrating radar, and determining the roadbed to be repaired.
3. The grouting rapid repair construction method for the road subgrade according to claim 1, which is characterized in that: the roadbed grouting material is cement slurry.
4. The grouting rapid repair construction method for the road subgrade according to claim 1, which is characterized in that: in the step (6), the threshold is a fixed value, and the fixed value is determined according to the road quality requirement.
5. The grouting rapid repair construction method for the road subgrade according to claim 1, which is characterized in that: in the step (6), the threshold is determined according to the initial dynamic elastic modulus of the grouting point, and the threshold is obtained by multiplying the initial dynamic elastic modulus of the grouting point by a repair coefficient.
6. The grouting rapid repair construction method for the road subgrade according to claim 1, which is characterized in that: the repair coefficient is set to be 1.15-1.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011512990.9A CN112359698A (en) | 2020-12-20 | 2020-12-20 | Construction method for quickly repairing roadbed by grouting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011512990.9A CN112359698A (en) | 2020-12-20 | 2020-12-20 | Construction method for quickly repairing roadbed by grouting |
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| CN112359698A true CN112359698A (en) | 2021-02-12 |
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| CN202011512990.9A Pending CN112359698A (en) | 2020-12-20 | 2020-12-20 | Construction method for quickly repairing roadbed by grouting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508015A (en) * | 2022-03-08 | 2022-05-17 | 河南城建学院 | Method for reinforcing and repairing bridge-head bump road surface |
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| CN101593227A (en) * | 2009-06-30 | 2009-12-02 | 重庆交通大学 | Slope back analysis method based on anchoring load monitoring data |
| 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 |
| CN104807983A (en) * | 2015-04-23 | 2015-07-29 | 山东大学 | Determination method for elasticity modulus of early-stage concrete |
| CN104880544A (en) * | 2015-04-02 | 2015-09-02 | 山东大学 | Method for detecting and evaluating reinforcing effect on weak surrounding rock grouting during underground construction |
| CN106587782A (en) * | 2016-12-21 | 2017-04-26 | 江苏卓典钻掘科技有限公司 | Method for preparing geopolymer grouting material and method for applying geopolymer grouting material to static pressure grouting |
| CN110779854A (en) * | 2019-10-28 | 2020-02-11 | 广西交通科学研究院有限公司 | Carbonate corrosion resistance of geopolymer grouting material and evaluation method thereof |
-
2020
- 2020-12-20 CN CN202011512990.9A patent/CN112359698A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101593227A (en) * | 2009-06-30 | 2009-12-02 | 重庆交通大学 | Slope back analysis method based on anchoring load monitoring data |
| 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 |
| CN104880544A (en) * | 2015-04-02 | 2015-09-02 | 山东大学 | Method for detecting and evaluating reinforcing effect on weak surrounding rock grouting during underground construction |
| CN104807983A (en) * | 2015-04-23 | 2015-07-29 | 山东大学 | Determination method for elasticity modulus of early-stage concrete |
| CN106587782A (en) * | 2016-12-21 | 2017-04-26 | 江苏卓典钻掘科技有限公司 | Method for preparing geopolymer grouting material and method for applying geopolymer grouting material to static pressure grouting |
| CN110779854A (en) * | 2019-10-28 | 2020-02-11 | 广西交通科学研究院有限公司 | Carbonate corrosion resistance of geopolymer grouting material and evaluation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508015A (en) * | 2022-03-08 | 2022-05-17 | 河南城建学院 | Method for reinforcing and repairing bridge-head bump road surface |
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