Construction method of concrete highway widened roadbed

Abstract

The invention relates to the technical field of road construction, in particular to a construction method of a concrete road widened roadbed, which comprises the following steps: acquiring a dynamic modulus value of an old roadbed surface at the edge of an existing roadbed, and starting a difference interface reinforcement strategy; an interface strengthening bonding material is selected, and interface strengthening spraying operation is carried out; a technology of combining layered filling and an intelligent continuous compaction system is adopted, and widened side filling operation is carried out; a bidirectional pressure sensor and a distributed settlement meter are buried, and a boundary grouting compensation strategy is started in combination with a preset settlement management threshold value; and three-dimensional point cloud of a newly-filled roadbed edge area is collected, slab staggering displacement is calculated, and a secondary reinforcement strategy is started in combination with a preset slab staggering allowable threshold value. According to the method, by introducing the precise reconstruction of the existing roadbed interface, the automatic grading use of the modulus matching filler and the boundary grouting compensation strategy based on dynamic settlement, the overall combination performance and the structural coordination deformation capacity between the newly-filled roadbed and the existing roadbed can be remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of road construction, and in particular to a construction method for widening a roadbed of a concrete highway. Background Art

[0002] In the existing concrete highway widening construction, the step method is commonly used to cut or excavate the existing roadbed and then fill the new roadbed. However, this technology has the following two key defects: (1) The coordination ability of the new and old interfaces is weak: the surface structure of the existing roadbed has become fatigued and loose after long-term use. Directly using the edge of the old road to excavate steps will result in poor adhesion and low shear strength, making it difficult to form a stable new-old connection interface; (2) The deformation coordination performance is poor and the difference after construction is significant: the new and existing roadbed structures have different material properties and it is difficult to unify the compaction process, resulting in a large difference in modulus between the two. Under the influence of its own gravity, construction load or long-term traffic load, the new roadbed is prone to differential settlement or shear dislocation, which in turn leads to structural cracks and sliding damage at the joints.

[0003] These problems directly affect the overall structural stability of the highway widening section, reduce the durability and construction safety of the renovation and expansion project, and have significant technical gaps, especially in dynamic enhancement, deformation monitoring and modulus control.

[0004] Therefore, the present invention proposes a construction method for widening a roadbed of a concrete highway. Summary of the Invention

[0005] Based on this, it is necessary to provide a construction method for widening the roadbed of a concrete highway in order to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a construction method for widening a roadbed of a concrete highway, comprising: obtaining the dynamic modulus value of the old roadbed surface at the edge of the existing roadbed, and when the dynamic modulus value of the old roadbed surface exceeds a preset modulus threshold, initiating a differential interface reinforcement strategy to form an interface reconstruction layer; based on the dynamic modulus value of the old roadbed surface, selecting a corresponding interface strengthening bonding material, performing an interface strengthening spraying operation on the interface reconstruction layer to form an interface strengthening bonding layer; adopting a technology combining layered filling with an intelligent continuous compaction system, The widening side filling operation is carried out on the outside of the knot layer to form a new filled roadbed; the grouting pipeline is buried on the rear side of the interface between the existing roadbed and the newly filled roadbed, and the grouting points are set based on the preset first distance interval. The bidirectional pressure sensors and distributed settlement meters are buried at the orifices of the grouting points to regularly collect the pressure and settlement values ​​at the interface, and start the boundary grouting compensation strategy based on the preset settlement management threshold; based on the preset time period, the three-dimensional point cloud of the edge area of ​​the newly filled roadbed is collected, the displacement of the misalignment is calculated, and the secondary reinforcement strategy is started based on the preset misalignment allowable threshold.

[0007] Optionally, obtaining the dynamic modulus value of the old roadbed surface at the edge of the existing roadbed includes: arranging a sampling point at a preset second distance interval of the edge section of the existing roadbed, and using a surface wave velocity detector to collect the dynamic modulus value of the old roadbed surface at each sampling point section.

[0008] Optionally, when the dynamic modulus value of the old roadbed surface exceeds a preset modulus threshold, a differential interface reinforcement strategy is initiated to form an interface reconstruction layer, including: when the dynamic modulus value of the old roadbed surface exceeds the preset modulus threshold, the edge of the old roadbed is decontaminated and the horizontal and vertical grains are roughened to form a preliminary reconstruction interface; when the dynamic modulus value of the old roadbed surface is less than or equal to the preset modulus threshold, high-frequency vibration milling equipment is used to perform interface reconstruction operations to form a movable bonding interface; the preliminary reconstruction interface and the movable bonding interface are used as the interface reconstruction layer.

[0009] Optionally, based on the dynamic modulus value of the old roadbed surface, the corresponding interface strengthening bonding material is selected, and an interface strengthening spraying operation is performed on the interface reconstruction layer to form an interface strengthening bonding layer, including: combining the constructed preset modulus threshold and the mapping relationship between the interface strengthening bonding material, judging the preset modulus threshold to which the dynamic modulus value of the old roadbed surface of each sampling point section belongs, selecting the corresponding interface strengthening bonding material, and using a pneumatic jetting device to spray the interface strengthening bonding material on the interface reconstruction layer to form an interface strengthening bonding layer.

[0010] Optionally, the technology of combining layered filling with an intelligent continuous compaction system is used to perform widening side filling operations on the outside of the interface strengthening bonding layer to form a new filled roadbed, including: according to different geological conditions and the strength differences of the existing roadbed, the modulus adaptive multi-layer filling technology is used to perform widening side filling operations on the outside of the interface strengthening bonding layer, and in the process of widening side filling operations, combined with the intelligent continuous compaction system, the dynamic wheel load transmission force and rebound strain are obtained through the roller axle load sensor, based on the filling dynamic modulus calculation formula, the filling dynamic modulus of each sampling point section is calculated, and based on the calculation formula for increasing the number of rolling times, the required increase in the number of rolling times is calculated, and the reinforcement vibration compaction strategy is started to form a new filled roadbed.

[0011] Optionally, the dynamic modulus calculation formula is: ;in, For dynamic wheel load transmission force, is the rebound strain, is the dynamic modulus of fill.

[0012] Optionally, the calculation formula for increasing the number of rolling times is: ; Where n is the number of times of increasing rolling.

[0013] Optionally, a grouting pipeline is buried on the rear side of the interface between the existing roadbed and the newly filled roadbed, grouting points are set based on a preset first distance interval, and bidirectional pressure sensors and distributed settlement meters are buried at the orifices of the grouting points, including: a grouting pipeline is buried on the rear side of the interface between the existing roadbed and the newly filled roadbed, and the grouting depth is set to penetrate the newly filled roadbed by more than 1m, a grouting point is set at a distance of 5m, and bidirectional pressure sensors and distributed settlement meters are buried at the orifices of the grouting points to regularly collect pressure values ​​and settlement values ​​at the interface.

[0014] Optionally, the boundary grouting compensation strategy is started in combination with a preset settlement management threshold, including: calculating the settlement difference based on the pressure value and settlement value at the joint surface collected regularly according to the settlement difference calculation formula, comparing the pressure value and settlement difference with the preset settlement management threshold, and starting the boundary grouting compensation strategy.

[0015] Optionally, based on a preset time period, the three-dimensional point cloud of the edge area of ​​the newly filled roadbed is collected, the misalignment displacement is calculated, and a secondary reinforcement strategy is initiated in combination with a preset misalignment tolerance threshold, including: using an unmanned aircraft equipped with an oblique photography system to collect the three-dimensional point cloud of the edge area of ​​the newly filled roadbed based on a preset time period, and constructing a three-dimensional model of the boundary area of ​​the newly filled roadbed; comparing the three-dimensional model of the boundary area of ​​the newly filled roadbed with the three-dimensional model of the boundary area of ​​the initial path, and using a misalignment displacement calculation formula to calculate the misalignment displacement; if the misalignment displacement exceeds the preset misalignment tolerance threshold, the secondary reinforcement strategy is initiated.

[0016] The present invention provides a construction method for widening a concrete highway roadbed, which has the following beneficial effects.

[0017] By introducing precise reconstruction of the existing roadbed interface, automatic graded use of modulus-matched fillers, and a boundary grouting compensation strategy based on dynamic settlement, the present invention can significantly improve the overall bonding performance and structural coordinated deformation capacity between the newly constructed roadbed and the existing roadbed compared to the interface solidification mode of the traditional step-type filling method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a flow chart of a construction method for widening a concrete highway roadbed according to the present application. DETAILED DESCRIPTION

[0019] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and are not to be construed as limitations on the present application. In addition, the following embodiments and features in the embodiments may be combined with each other unless there is a conflict. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0020] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0021] Reference Attachment Figure 1 This application provides a construction method for widening a concrete highway subgrade. This method is suitable for widening concrete highways where typical issues such as old pavement fatigue, uneven geology, and significant modulus differences exist. It can provide technical support for large-scale transportation hubs, highway capacity improvements, and urban arterial road splicing and upgrading. The method includes the following steps.

[0022] S1: Obtain the dynamic modulus value of the old roadbed surface at the edge of the existing roadbed, and when the dynamic modulus value of the old roadbed surface exceeds a preset modulus threshold, initiate a differential interface reinforcement strategy to form an interface reconstruction layer.

[0023] In some optional implementations of the present application, the method of obtaining the dynamic modulus value of the old roadbed surface at the edge of the existing roadbed includes: arranging a sampling point at a preset second distance interval of the edge section of the existing roadbed, and using a surface wave velocity detector to collect the dynamic modulus value of the old roadbed surface in each sampling point section.

[0024] In some optional implementations of the present application, a sampling point is arranged every 3 meters at the edge of the existing roadbed, and a surface wave velocity detector is used to perform modulus detection on the edge of the existing roadbed within a depth range of 0-50 cm to obtain the dynamic modulus value of the old roadbed surface in each sampling point section.

[0025] In some optional implementations of the present application, when the dynamic modulus value of the old roadbed surface exceeds a preset modulus threshold, a differential interface reinforcement strategy is initiated to form an interface reconstruction layer, including: when the dynamic modulus value of the old roadbed surface exceeds the preset modulus threshold, the edge of the old roadbed is decontaminated and the horizontal and vertical grains are roughened to form a preliminary reconstruction interface; when the dynamic modulus value of the old roadbed surface is less than or equal to the preset modulus threshold, high-frequency vibration milling equipment is used to perform interface reconstruction operations to form a movable bonding interface; the preliminary reconstruction interface and the movable bonding interface are used as the interface reconstruction layer.

[0026] In some optional implementations of the present application, the preset modulus threshold can be set to 60MPa. When the dynamic modulus value of the old roadbed surface exceeds 60MPa, the sampling point section can only be subjected to light decontamination and horizontal and vertical grain roughening treatment to form a preliminary reconstruction interface to avoid excessive disturbance of the original structure of the existing roadbed; when the dynamic modulus value of the old roadbed surface is less than or equal to 60MPa, the sampling point section is subjected to interface reconstruction operations using high-frequency vibration cutting and milling methods of high-frequency vibration milling equipment to form a stepped bonding layer with a depth of 15-30cm and a width of 0.5-1.0m, and the stepped bonding layer is used as a movable bonding interface to obtain a uniform, dense and excellent bonding performance of the new and old connection surface; based on the preliminary reconstruction interface and the movable bonding interface, an interface reconstruction layer is obtained.

[0027] S2: Based on the dynamic modulus value of the old roadbed surface, the corresponding interface strengthening bonding material is selected, and the interface strengthening spraying operation is performed on the interface reconstruction layer to form an interface strengthening bonding layer.

[0028] In some optional implementations of the present application, the corresponding interface strengthening bonding material is selected based on the dynamic modulus value of the old roadbed surface, and an interface strengthening spraying operation is performed on the interface reconstruction layer to form an interface strengthening bonding layer, including: combining the constructed preset modulus threshold and the mapping relationship between the interface strengthening bonding material, judging the preset modulus threshold to which the dynamic modulus value of the old roadbed surface of each sampling point section belongs, selecting the corresponding interface strengthening bonding material, and using air pressure spraying equipment to spray the interface strengthening bonding material on the interface reconstruction layer to form an interface strengthening bonding layer.

[0029] In some optional implementations of the present application, the mapping relationship between the preset modulus threshold and the interface strengthening bonding material is constructed, specifically including: when the dynamic modulus value of the old roadbed surface is less than or equal to 60 MPa, the selected group ratio of the interface strengthening bonding material is: ,in, The selected component ratio of the interface strengthening bonding material under the condition that the dynamic modulus value of the old roadbed surface is less than or equal to 60MPa, is the weight of cement, in t, is the weight of the composite polymer colloid, in t; when the dynamic modulus value of the old roadbed surface exceeds 60 MPa, the selected component ratio of the interface strengthening bonding material is: ,in, The selected component ratio of the interface strengthening bonding material when the dynamic modulus value of the old roadbed surface exceeds 60MPa is used to reduce the risk of stiffness mutation caused by excessively high interface mixing strength.

[0030] S3: Using a technology that combines layered filling with an intelligent continuous compaction system, widening side filling operations are performed on the outside of the interface strengthening bonding layer to form a new filled roadbed.

[0031] In some optional implementations of the present application, the technology of combining layered filling with an intelligent continuous compaction system is used to perform widening side filling operations on the outside of the interface strengthening bonding layer to form a new filled roadbed, including: according to different geological conditions and the strength differences of the existing roadbed, the modulus adaptive multi-layer filling technology is used to perform widening side filling operations on the outside of the interface strengthening bonding layer, and in the process of widening side filling operations, combined with the intelligent continuous compaction system, the dynamic wheel load transmission force and rebound strain are obtained through the roller axle load sensor, and the dynamic modulus of filling of each sampling point section is calculated based on the dynamic modulus calculation formula, and the required increased number of rolling times is calculated based on the calculation formula for increasing the number of rolling times, and the reinforcement vibration and compaction strategy is started to form a new filled roadbed.

[0032] In some optional implementations of the present application, in response to different geological conditions and strength differences of existing roadbeds, a modulus-adaptive multi-layer filling technology can be used to perform widening side filling operations on the outside of the interface strengthening bonding layer. For example, the target modulus E1 of the bottom layer (close to the existing roadbed) is 65MPa, and a mixture of 15% mineral powder and 85% gravel (measured in weight percentage) can be used, and based on the previous ratio, an additional 5% cement curing agent is added (the amount of cement curing agent accounts for 5% of the total ratio of mineral powder and gravel mixture) as filler for widening side filling operations; the target modulus E2 of the middle layer is 90MPa, and ordinary water-stabilized gravel can be used as filler for widening side filling operations; the top layer can use a structural reinforcement method combining skeleton-compacted gravel soil and bidirectional steel-plastic grid for widening side filling operations.

[0033] In some optional implementations of the present application, the present application adopts an intelligent continuous compaction system (Impact Compaction Monitoring, abbreviated as ICM), obtains the dynamic wheel load transmission force and rebound strain through the roller axle load sensor, calculates the dynamic modulus of the filling of each sampling point section based on the calculation formula of the dynamic modulus of the filling, and calculates the required increase in the number of rolling times based on the calculation formula of the increase in the number of rolling times. When the calculated dynamic modulus of the filling of a certain sampling point section is less than 85MPa, it can be calculated that the number of rolling times should be increased from 2 rounds to 4 rounds, and the reinforcement vibration compaction strategy is started to form a new fill roadbed.

[0034] In some optional implementations of the present application, the dynamic modulus calculation formula is: ;in, For dynamic wheel load transmission force, is the rebound strain, is the dynamic modulus of fill.

[0035] In some optional implementations of the present application, the calculation formula for increasing the number of rolling times is: ; Where n is the number of times of increasing rolling.

[0036] S4: Grouting pipelines are buried on the rear side of the interface between the existing roadbed and the newly constructed roadbed. Grouting points are set based on the preset first distance intervals. Bidirectional pressure sensors and distributed settlement meters are buried at the orifices of the grouting points to regularly collect pressure and settlement values ​​at the interface. Combined with the preset settlement management threshold, the boundary grouting compensation strategy is initiated.

[0037] In some optional implementations of the present application, a grouting pipeline is buried on the rear side of the interface between the existing roadbed and the newly filled roadbed, grouting points are set based on a preset first distance interval, and bidirectional pressure sensors and distributed settlement meters are buried at the orifices of the grouting points, including: a grouting pipeline is buried on the rear side of the interface between the existing roadbed and the newly filled roadbed, and the grouting depth is set to penetrate the newly filled roadbed by more than 1m, a grouting point is set at a distance of 5m, and a bidirectional pressure sensor and a distributed settlement meter are buried at the orifices of the grouting points to regularly collect pressure values ​​and settlement values ​​at the interface.

[0038] In some optional implementations of the present application, the boundary grouting compensation strategy is started in combination with a preset settlement management threshold, including: calculating the settlement difference based on the pressure value and settlement value at the joint surface collected regularly according to the settlement difference calculation formula, comparing the pressure value and settlement difference with the preset settlement management threshold, and starting the boundary grouting compensation strategy.

[0039] In some optional implementations of the present application, the settlement difference of each grouting point at the joint surface is calculated according to the settlement difference calculation formula. The specific formula is: ;in, is the settlement difference of each grouting point at the joint surface, is the settlement value at the interface collected in the current cycle, is the settlement value at the interface collected in the previous cycle; if two consecutive collections When the settlement exceeds 2 mm and the pressure exceeds 80 kPa (the preset settlement management threshold), the boundary grouting compensation strategy is automatically activated. For example, for locations with significant settlement at the joint surface, the grouting system is activated to inject a high-speed curing expansive material with a shear strength of more than 35 kPa. The material injection volume is calculated using the following formula: ; Where V is the material injection volume, A is the grouting area, is the settlement difference of each grouting point at the joint surface, The compensation coefficient is 1.3-1.6, and its specific value depends on the soil permeability coefficient; for example, when the measured area A at a certain joint surface is 3.6 square meters, 0.003m, is 1.5, then V can be calculated to be 0.0162 cubic meters.

[0040] S5: Based on the preset time period, the 3D point cloud of the edge area of ​​the newly filled roadbed is collected, the displacement of the misalignment is calculated, and the secondary reinforcement strategy is initiated based on the preset misalignment tolerance threshold.

[0041] In some optional implementations of the present application, the three-dimensional point cloud of the edge area of ​​the newly filled roadbed is collected based on a preset time period, the misalignment displacement is calculated, and a secondary reinforcement strategy is initiated in combination with a preset misalignment tolerance threshold, including: using an unmanned aircraft equipped with an oblique photography system to collect the three-dimensional point cloud of the edge area of ​​the newly filled roadbed based on a preset time period, and constructing a three-dimensional model of the boundary area of ​​the newly filled roadbed; comparing the three-dimensional model of the boundary area of ​​the newly filled roadbed with the three-dimensional model of the boundary area of ​​the initial path, and using a misalignment displacement calculation formula to calculate the misalignment displacement; if the misalignment displacement exceeds the preset misalignment tolerance threshold, the secondary reinforcement strategy is initiated.

[0042] In some optional implementations of the present application, a three-dimensional point cloud of the edge area of ​​the newly filled roadbed is collected once every preset time period (e.g., weekly) using an unmanned aircraft equipped with an oblique photography system. A three-dimensional model of the boundary area of ​​the newly filled roadbed is constructed based on the collected three-dimensional point cloud. The three-dimensional model of the boundary area of ​​the newly filled roadbed is compared with the three-dimensional model of the boundary area of ​​the initial path, and the misalignment displacement calculation formula is used to calculate the misalignment displacement. The formula is: ;in, is the displacement of the platform, is the measured three-dimensional point cloud coordinate vector, is the three-dimensional point cloud coordinate vector of the initial path boundary area; the preset misalignment tolerance threshold can be set to 8mm. If the calculated When it exceeds 8mm, the secondary grouting and heavy pressure reinforcement strategy is initiated.

[0043] In some optional implementations of the present application, a comparative test was conducted between the interface solidification mode of the traditional step-type filling method and the construction method provided in the present application. The test results are shown in Table 1 below.

[0044] Table 1 Test results As can be seen from Table 1, the present invention effectively reduces the modulus difference and settlement difference between the existing roadbed and the newly constructed roadbed through the automatic grading of modulus matching fillers and the boundary grouting compensation strategy based on dynamic settlement, and can promote uniform settlement to avoid the frequent occurrence of structural cracks and displacement deformation.

[0045] The above content is a further detailed description of the present invention in conjunction with specific embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A construction method for widening a concrete highway roadbed, characterized in that: include: Obtaining the dynamic modulus value of the old roadbed surface at the edge of the existing roadbed, and when the dynamic modulus value of the old roadbed surface exceeds a preset modulus threshold, initiating a differential interface reinforcement strategy to form an interface reconstruction layer; Based on the dynamic modulus value of the old roadbed surface, the corresponding interface strengthening bonding material is selected, and the interface strengthening spraying operation is performed on the interface reconstruction layer to form an interface strengthening bonding layer; Using a combination of layered filling and intelligent continuous compaction system technology, widening side filling operations are carried out on the outside of the interface strengthening bonding layer to form a new filled roadbed; A grouting pipeline is buried behind the interface between the existing roadbed and the newly constructed roadbed. Grouting points are set at preset first distance intervals. Bidirectional pressure sensors and distributed settlement meters are buried at the orifices of the grouting points to regularly collect pressure and settlement values ​​at the interface. The boundary grouting compensation strategy is activated based on the preset settlement management threshold. Based on the preset time period, the 3D point cloud of the edge area of ​​the newly filled roadbed is collected, the displacement of the misalignment is calculated, and the secondary reinforcement strategy is initiated based on the preset misalignment tolerance threshold.

2. A construction method for widening a concrete highway roadbed according to claim 1, characterized in that: The obtaining of the dynamic modulus value of the old roadbed surface at the edge of the existing roadbed includes: A sampling point is arranged at a preset second distance interval on the edge section of the existing roadbed, and a surface wave velocity detector is used to collect the dynamic modulus value of the old roadbed surface in each sampling point section.

3. A construction method for widening a concrete highway roadbed according to claim 2, characterized in that: When the dynamic modulus value of the old roadbed surface exceeds a preset modulus threshold, a differential interface reinforcement strategy is initiated to form an interface reconstruction layer, including: When the dynamic modulus value of the old roadbed surface exceeds the preset modulus threshold, the edge of the old roadbed is decontaminated and the horizontal and vertical lines are roughened to form a preliminary reconstructed interface; When the dynamic modulus value of the old roadbed surface is less than or equal to the preset modulus threshold, high-frequency vibration milling equipment is used to perform interface reconstruction operations to form a movable bonding interface; The preliminary reconstructed interface and the active bonding interface are used as the interface reconstructed layer.

4. A construction method for widening a concrete highway roadbed according to claim 3, characterized in that: The method comprises selecting a corresponding interface strengthening bonding material based on the dynamic modulus value of the old roadbed surface, performing an interface strengthening spraying operation on the interface reconstruction layer, and forming an interface strengthening bonding layer, including: Combined with the mapping relationship between the preset modulus threshold and the interface strengthening bonding material, the preset modulus threshold to which the dynamic modulus value of the old roadbed surface in each sampling point section belongs is determined, the corresponding interface strengthening bonding material is selected, and the interface strengthening bonding material is sprayed on the interface reconstruction layer using pneumatic jet equipment to form an interface strengthening bonding layer.

5. A construction method for widening a concrete highway roadbed according to claim 4, characterized in that: The above-mentioned technology of combining layered filling with an intelligent continuous compaction system is used to perform widening side filling operations on the outside of the interface strengthening bonding layer to form a new filled roadbed, including: According to different geological conditions and the strength differences of existing roadbeds, the modulus-adaptive multi-layer filling technology is adopted to carry out widening side filling operations on the outside of the interface strengthening bonding layer. During the widening side filling operation, combined with the intelligent continuous compaction system, the dynamic wheel load transmission force and rebound strain are obtained through the roller axle load sensor. Based on the calculation formula of the dynamic modulus of filling, the dynamic modulus of filling of each sampling point section is calculated. Based on the calculation formula of increasing the number of rolling times, the required number of additional rolling times is calculated, and the reinforcement vibration compaction strategy is started to form a new filling roadbed.

6. A construction method for widening a concrete highway roadbed according to claim 5, characterized in that: The calculation formula of the dynamic modulus of filling is: in, For dynamic wheel load transmission force, is the rebound strain, is the dynamic modulus of fill.

7. A construction method for widening a concrete highway roadbed according to claim 5, characterized in that: The calculation formula for increasing the number of rolling times is: Among them, n is the number of times of increasing rolling.

8. The construction method for widening a concrete highway roadbed according to claim 1, characterized in that: The method comprises: burying a grouting pipeline at the rear side of the interface between the existing roadbed and the newly constructed roadbed, setting grouting points based on a preset first distance interval, and burying a bidirectional pressure sensor and a distributed settlement meter at the orifice of the grouting point, including: A grouting pipeline is buried on the rear side of the interface between the existing roadbed and the newly filled roadbed, and the grouting depth is set to penetrate the newly filled roadbed by more than 1m. A grouting point is set at intervals of 5m, and a bidirectional pressure sensor and a distributed settlement meter are buried at the orifice of the grouting point to regularly collect the pressure and settlement values ​​at the interface.

9. A construction method for widening a concrete highway roadbed according to claim 8, characterized in that: The boundary grouting compensation strategy is initiated in combination with the preset settlement management threshold, including: Based on the pressure and settlement values ​​at the joint surface collected regularly, the settlement difference is calculated according to the settlement difference calculation formula. The pressure value and settlement difference are compared with the preset settlement management threshold to start the boundary grouting compensation strategy.

10. The construction method for widening a concrete highway roadbed according to claim 1, characterized in that: The method collects a 3D point cloud of the edge area of ​​the newly constructed roadbed based on a preset time period, calculates the displacement of the misalignment, and initiates a secondary reinforcement strategy based on a preset misalignment tolerance threshold, including: Using an unmanned aerial vehicle equipped with an oblique photography system, a 3D point cloud of the edge area of ​​the newly filled roadbed is collected based on a preset time period to construct a 3D model of the boundary area of ​​the newly filled roadbed. The three-dimensional model of the boundary area of ​​the newly filled roadbed is compared with the three-dimensional model of the boundary area of ​​the initial path. The misalignment displacement calculation formula is used to calculate the misalignment displacement. If the misalignment displacement exceeds the preset misalignment tolerance threshold, the secondary reinforcement strategy is initiated.

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