496 results about "Subgrade" patented technology

The invention discloses a fiber foamed concrete and a preparation method thereof. The fiber foamed concrete comprises the following raw materials in parts by weight: 5290 parts of cement, 4965 parts of water, 1.361 part of foaming solution, 1.2964 part of fly ash and 10 parts of fiber. The preparation method comprises the following steps: proportionally weighing the components; sequentially adding the cement and fly ash into a stirrer, proportionally weighing the water, uniformly stirring the mixture by the stirrer, and adding the fiber; preparing and adding the foaming solution; gradually adding the foam into the mixture, and continuously stirring until all the components are uniformly mixed; pouring the mixture into a mold on which lubricating oil is brushed, and curing in a curing chamber; after 24 hours, removing the mold; and respectively curing for 3 days, 7 days and 28 days for experimental detection. The fiber foamed concrete has the advantages of favorable thermal insulation property, favorable compression resistance and favorable bending resistance, and is applicable to a railway bed strengthening layer.

The invention discloses a frozen earth region highway subgrade thaw collapse measurement method and system, and relates to the technical field of data measurement management, and the method comprises the steps: obtaining a to-be-measured subgrade region, obtaining a plurality of measurement directions, forming a node sequence of each measurement direction, and obtaining a blank measurement region; acquiring a first moment and a second moment, acquiring a first roadbed height sequence at the first moment, acquiring a second roadbed height sequence at the second moment, and acquiring a current roadbed height sequence; obtaining a current trend value, obtaining a first historical trend value, obtaining a second historical trend value, obtaining a first difference value, and obtaining a second difference value; and if the first difference value and the second difference value are both smaller than a preset threshold value, obtaining a measurement result of each blank measurement area according to the current roadbed height sequence of each node sequence. The method has the advantages of accurate prediction, high-precision measurement and adaptive measurement.

The invention discloses a roadbed settlement and landslide hidden danger identification method and system along a traffic corridor, and the method comprises the steps: obtaining a time sequence satellite-borne data set of a target region, and carrying out the format conversion of the data format of the time sequence satellite-borne data set; generating an interference pair network based on the time baseline threshold; generating a filtered differential interference image set; performing differential interference phase unwrapping processing on the filtered differential interference image set to obtain an unwrapped differential interference image set; performing atmospheric delay phase correction on the unwrapped differential interference image set to obtain an unwrapped interference image set after atmospheric correction; calculating to obtain the annual average settlement rate of the linear traffic corridor area and a time sequence accumulated deformation result; based on the annual average settlement rate of the linear traffic corridor area, the spatial settlement gradient field information of the linear traffic corridor area is extracted, the settlement rate and the spatial settlement gradient field information meeting the hidden danger judgment standard are output, the roadbed settlement and landslide hidden danger extraction and recognition result of the target area is obtained, and the road area detection efficiency is improved.

The invention belongs to the technical field of road engineering roadbed nondestructive testing, discloses a roadbed humidity nondestructive testing method based on wireless radio frequency signal multi-parameter inversion, and aims to solve the problems that a traditional roadbed humidity testing method is destructive, low in efficiency and discontinuous in monitoring or detection parameters are easily interfered. The method specifically comprises the following steps of: firstly, embedding an RFID tag and acquiring an on-site received signal strength indication value; then establishing a relation model of the received signal strength indication value and the roadbed moisture content, and extracting characteristic parameters only influenced by the moisture content; then, constructing a neural network model, taking the extracted characteristic parameters as input, and utilizing field data to train the model to invert the roadbed moisture content; and finally, the spatial distribution of the moisture content of the roadbed is obtained by combining the distribution of the test points and the roadbed structure information, so that the efficient, non-contact and continuous monitoring of the humidity state of the roadbed is realized.

The invention discloses a roadbed settlement prediction method and system under an intermittent load effect. The method comprises the following steps: constructing a state evolution model of a roadbed under the action of intermittent load; cyclic stress parameters of the roadbed in the preset load period are determined, wherein the cyclic stress parameters comprise the dynamic stress amplitude, the number of cycles of the load and the initial stress value; a softening index corresponding to the roadbed is determined based on the cyclic stress parameter, a relational expression between the softening index and the load vibration frequency is established, and a modulus softening prediction model of the roadbed is determined based on the relational expression; and coupling the modulus softening prediction model with the state evolution model, and determining a roadbed cumulative strain prediction model based on a coupling result, so as to determine the settlement evolution state of the roadbed under the intermittent load based on the roadbed cumulative strain prediction model. According to the invention, the finally obtained roadbed accumulated strain prediction model can reflect the actual settlement state of the roadbed under the intermittent load more truly.

The invention discloses a powder spraying pile composite roadbed deformation prediction method, and particularly relates to the field of roadbed settlement prediction, comprising the following steps: in an edge calculation node, respectively constructing an underground water level change event, a construction stage event, a soil consolidation stage event and a traffic load cycle event into independent event time chains; the event time chain is recorded by taking the occurrence moment of the event, the duration of the event and the interval duration between the events as a time step unit; and performing splitting operation on the time step units of each event time chain, and forming a time granularity matrix according to the duration difference between the time step units. A plurality of types of discrete events such as water level, construction, consolidation, traffic load and the like are uniformly disassembled into time step length units, and a time granularity matrix and a time dislocation vector are constructed, so that the rhythm difference and dislocation relationship of the events on different time scales can be quantitatively expressed; and solving the transition of the settlement stage by taking the result as the observation input of the variational Markov model.

The invention relates to a crack detection method and system for expressway construction. The method comprises the following steps: acquiring a multi-modal sensing data set containing multispectral, three-dimensional point cloud and polarized light data on the surface of a highway to be detected, generating a multi-dimensional fusion image, and classifying to obtain a detection scene type; obtaining interference judgment parameters in combination with a preset scene-threshold mapping model; then layering and filtering interference to obtain an effective fusion image; geometric and thermodynamic parameters of the crack are extracted, working condition background data such as historical detection, environment and traffic are combined, a complete-cycle comprehensive risk value and roadbed residual bearing capacity are obtained, and finally a grading detection report is generated. By adopting the method, the crack risk and the roadbed bearing capacity can be quantified, and the reliability of complex scene detection and the scientificity of maintenance decision are improved.

The invention discloses a highway roadbed construction quality early warning method and system based on multi-modal data, and belongs to the field of construction quality control, and the method comprises the steps: obtaining multi-modal construction data, and carrying out the time-space alignment and feature fusion processing, generating a spatio-temporal data tensor representing the states of the plurality of discrete grid units under the continuous time step length; inputting the spatio-temporal data tensor into a preset deep learning prediction model, wherein the deep learning prediction model comprises a spatial feature extraction module and a time-dependent modeling module which are connected in series; extracting a convolutional neural network through a spatial feature extraction module; processing a time sequence of the local spatial correlation characteristics through a recurrent neural network of a time-dependent modeling module; predicting and outputting a future quality index for at least one target grid unit in the plurality of discrete grid units; and an instruction for performing process control on subsequent construction is generated. According to the invention, refined guidance of the construction process is realized.

The invention is a system and method for repairing, improving, and stabilizing subgrade and subsoil / natural ground layers of a rail bed generally consisting of softer soils. One embodiment includes a method of installing subsurface inclusions and ballast fills comprising injected slurry mixtures of stabilizing material such as cement grout mixed with in situ soil. Another embodiment includes a system of installed ground inclusions and ballast fills. Another embodiment includes an integrated system of equipment for emplacing the system of inclusions and ballast fills.

The invention provides a grouting diffusion three-dimensional monitoring system and method and a medium, and relates to the technical field of railway roadbeds, and the system comprises an acquisition module and a data processing module; the acquisition module is used for acquiring apparent resistivity corresponding to a grouting diffusion area in a railway roadbed in parallel; and the data processing module is connected with the acquisition module and is used for performing forward modeling and inversion according to a preset geoelectric model and the apparent resistivity to obtain a three-dimensional apparent resistivity map representing the grouting diffusion range. Thus, on one hand, the collection efficiency of apparent resistivity is improved, on the other hand, a three-dimensional apparent resistivity map can be obtained, three-dimensional real-time monitoring of the slurry flow path, the flow range, the spatial and temporal distribution and the occurrence state in the grouting process is achieved, the slurry diffusion condition is accurately and visually reflected, and the grouting quality is improved. And a basis is provided for grouting reinforcement mechanism research, technical development and scheme optimization.

A subgrade compaction pit soil-sampling device, comprising a frame (1) for providing support, upper and lower ends of the frame (1) being each provided with a cover plate (7), and a through hole being formed in the middle of each cover plate (7); a plurality of guide rails (4) arranged in the frame (1), two ends of each guide rail (4) being respectively connected to the upper and lower cover plates (7); a frame bucket (2) arranged at the bottom of the frame (1) and enclosing the bottom of the frame (1), the frame bucket (2) engaging with the lower cover plate (7) to form a cavity for accommodating subgrade soil extracted by a soil-sampling device; and the soil-sampling device (3) mounted on a guide rail plate (5), the guide rail plate (5) being cooperatively connected to the plurality of guide rails (4). A mechanical rotary drilling method is used to perform deep pit drilling of the subgrade, achieving high drilling efficiency, and after the drilling is finished, the soil can be extracted by reverse drilling, providing a convenient soil-sampling method.

The invention relates to the technical field of building construction, and provides a foam light soil construction method and a roadbed structure, the construction method comprises the following steps: excavating a foundation pit, cutting a slope at an old road slope on one side of an original roadbed, and digging steps and a base; a baffle is vertically arranged, a baffle foundation is poured on the other side, opposite to the steps, of the foundation pit, the baffle is vertically arranged, and a filling area is defined; and layered filling is conducted, specifically, after the baffles are erected, foam light soil is filled into the filling area in a layered mode based on the height of each filling layer. Through the arrangement, the vertical additional stress of high fill construction on a foundation can be remarkably reduced, the post-construction settlement problem caused by overlarge self weight of a traditional material is effectively relieved, meanwhile, due to the characteristics that the foam light soil is high in flowability and can be used for pumping construction, the operation process is simplified, dependence on large-scale compaction equipment is reduced, the construction period is shortened, and the construction cost is reduced. The environmental influence and the cost caused by excavation and transportation of earthwork are reduced, and the reliability and the economical efficiency of roadbed widening engineering are realized.

The invention discloses a railway roadbed settlement prediction method and system, and belongs to the technical field of railway engineering. According to the method, basic data such as a roadbed structure, filler parameters, geological conditions and historical monitoring data are collected, a differential prediction model is matched according to roadbed strength grades, risk grading and monitoring resource dynamic allocation are carried out after parameter optimization and multi-index precision evaluation, and iterative optimization is realized based on an empirical database. The system comprises a data acquisition module, a model matching module, a settlement simulation module, a precision evaluation module, a post-processing module and a data storage module, and all the modules cooperate to achieve full-process automation. According to the method and the system, the problem of insufficient adaptability of a traditional single model is solved through accurate model adaptation, the prediction efficiency and the data reliability are improved by means of automatic processing, the safety and the cost are balanced through risk hierarchical management and control, and the adaptability of the system to complex working conditions is continuously enhanced through an iteration mechanism.

The invention discloses a reconstruction and extension subgrade settlement analysis method and system, and the method comprises the steps: obtaining the subgrade height data of each monitoring point at an initial moment, carrying out the road division according to a preset height threshold value, and obtaining a plurality of reconstruction and extension subgrade sections; clustering is carried out according to the lengths of the sub-road sections, and a first target reconstruction and extension sub-roadbed section and a second target reconstruction and extension sub-roadbed section which are farthest from each other are selected in a set; acquiring first settlement data and second settlement data of each monitoring point position in the first target reconstruction and extension subgrade section at the current moment; determining a settlement variable quantity between the first settlement data sequence and the second settlement data sequence, and judging whether the settlement variable quantity is greater than a dynamic preset threshold value or not; and if the settlement data is not greater than the dynamic preset threshold value, acquiring other settlement data of each monitoring point position in other target reconstructed and expanded subgrade sections at the current moment. According to the invention, the accuracy, reliability and efficiency of settlement analysis are improved, and intelligent risk assessment is realized.

The invention is applicable to the technical field of road construction, and provides a digging and filling method for highway subgrade construction, which comprises the following steps: T1, carrying out construction operation according to a construction drawing, digging a pavement through a digging machine to form a groove, and piling dug soil on the ground on two sides of the groove; t2, the grooves are evenly filled with filling materials such as stone, coal cinder and gravel; t3, the road roller is controlled to slowly move along the foundation pit, a soil returning device at the front end of the road roller is used for backfilling soil on the two sides of the foundation pit, and a compaction steel wheel at the rear end of the road roller is used for compacting the backfilled groove; the soil returning device comprises a fixing assembly and a backfilling assembly arranged on the fixing assembly in a sliding mode. According to the method, the rotating shaft is controlled to rotate to drive the two sets of spiral conveying blades with opposite spiral directions to synchronously rotate, most of soil on the two sides of the groove is conveyed into the groove, the two sets of bulldozing plates are driven to push the residual coating into the groove through linkage of all the parts, and the backfilling efficiency is improved.

The utility model provides a deep perforating device for roadbed settlement reinforcement, which relates to the technical field of building construction and comprises a triangular bottom plate. Three groups of balance plates are annularly arranged on the triangular bottom plate, a supporting vertical plate is vertically arranged on the upper end face of the triangular bottom plate, a triangular top plate is fixedly connected to the top of the supporting vertical plate, and two guide columns are fixedly connected between the triangular top plate and the triangular bottom plate; by arranging the drilling and smoothing mechanism, after drilling operation is completed, a rotating rod slowly stretches out towards the earth surface direction, meanwhile, reverse accelerated rotating motion is conducted, and by means of inertia of an inertia balance weight piece, a traction rod forwards pushes a balance weight block to be separated towards the outer side; at the moment, the smoothing arc plate makes contact with the inner wall of the drill hole, the balancing weight exerts pressure, and the smoothing arc plate is tightly attached to the inner wall of the drill hole to do high-speed rotating motion, so that the inner wall is smoothed, the concave-convex degree of the inner wall is effectively reduced, and favorable conditions are created for follow-up steel bar implanting work; the problem that after an existing foundation punching device completes punching operation, the hole wall is obviously uneven is solved.

The invention relates to the technical field of highway safety, and particularly discloses a highway subgrade rolling stone early warning method and system. The method comprises the following steps: collecting vibration data along a highway subgrade by using a distributed optical fiber sonic sensor; constructing an original event data set, simulating a rolling stone event by throwing stones and collecting blocking event vibration data in a normal traffic flow, generating a vibration energy distribution diagram, and identifying and marking energy high-value point locations to obtain data fragments; carrying out sample expansion processing on the rolling stone event data fragments, and carrying out stratified sampling and clustering analysis on the blocking event data fragments to form a balanced final event data set; converting the vibration data into a two-dimensional spectrogram; training the spectrogram by using a multi-scale convolutional neural network model; and classifying real-time vibration data by using the trained model, and accurately identifying a rolling stone event and a blocking event. The system comprises a data acquisition module, a data set preprocessing module, a feature conversion module and an intelligent identification module. Through efficient data processing and a deep learning model, rolling stone and interference events can be effectively distinguished, and the early warning precision and reliability are improved.

The invention relates to the technical field of engineering monitoring, and discloses a soft soil foundation high-speed rail station roadbed safety construction monitoring method and system, and the method comprises the steps: constructing a finite element model and an LSTM model for bidirectional data feedback, and carrying out the monitoring of the safety construction of a soft soil foundation high-speed rail station roadbed according to construction time sequence data and construction real-time data; the method comprises the following steps: accurately performing short-term prediction and long-term prediction on monitoring data of a soft soil foundation high-speed railway station roadbed construction project, outputting a construction suggestion, and after the construction suggestion is implemented, further optimizing a finite element model and an LSTM model for data bidirectional feedback according to newly collected data, so as to obtain a prediction result; short-term and long-term prediction on soft soil foundation high-speed railway station roadbed construction projects is realized at the same time, so that safe construction monitoring is performed, and the problem of insufficient real-time performance of construction monitoring is avoided.

The invention relates to the technical field of roadbed detection, and discloses a roadbed compaction quality detection method based on ultrasonic wave collaboration, and the roadbed compaction quality detection method comprises the following steps: collecting full-wave band ultrasonic echo signals, and obtaining current environment data; calculating a longitudinal wave speed, a transverse wave speed and a wave speed ratio, and extracting an attenuation coefficient and a frequency dispersion characteristic of the ultrasonic echo signal to obtain an acoustic characteristic set; inputting the acoustic feature set and the environmental data into an environmental compensation model, outputting a standard acoustic parameter set subjected to temperature, humidity and water content correction, analyzing the standard acoustic parameter set through a soil texture classification algorithm, and judging the current soil texture type; and combining the standard acoustic parameter set and the current soil texture type into a multi-dimensional feature vector, inputting the multi-dimensional feature vector into a compactness calculation model, and calculating to obtain a roadbed compactness value of the current measuring point. According to the method, high-precision compaction degree numerical calculation is realized, and intelligent and visual whole-process support is provided for roadbed construction quality.

This invention relates to a support structure and construction method for rapid repair of landslide-affected roadbed slopes, belonging to the field of roadbed engineering emergency repair. The support structure is a pile-slab support structure, composed of steel piles and hollow precast diaphragms. The steel piles include bottom segments, standard segments, splicing pins, and splicing bolts. Both the bottom and standard segments include multiple splicing grooves at their top. The hollow precast diaphragms include bottom segments, standard segments, splicing pins, and splicing bolts. Both bottom and standard segments include multiple splicing grooves at their top. The pile-slab support structure of this invention features simple construction, high efficiency and convenience, high strength, good versatility, safety and reliability, wide applicability, and energy saving and economy. It can be used to achieve rapid restoration of traffic on damaged roads and provide a closed, efficient, and safe construction environment for rapid repair of landslide-affected roadbed slopes.

The invention provides a high-speed railway subgrade filler with noise reduction and crack resistance functions and a preparation process thereof, and particularly relates to a totally-enclosed sound barrier structure for high-speed railway noise reduction engineering, which comprises an entrance-exit hole section, a plurality of standard sections and a plurality of expansion joint sections, the access hole section and the first standard section are sequentially connected front and back, the standard sections and the expansion joint sections are arranged at intervals one by one, and one expansion joint section is arranged between every two adjacent standard sections; the totally-closed sound barrier has the advantages that the totally-closed sound barrier is divided into the access hole section, the standard section and the expansion joint section, the access hole is connected with the stand columns through the steel beams inclining inwards by 45 degrees, the ends of the arc-shaped stand columns are connected through the double-curved-surface arc-shaped steel beams, the integrity of the steel structure is improved, splicing nodes are optimized, the standard section is formed by arranging the arc-shaped steel beams at the interval of 2 m, and the expansion joint section is formed. The arc steel beams are arranged at intervals at the position of the expansion joint, the standard steel beams on the two sides of the expansion joint are designed to be of a full-cloth structure, firmness is improved, and the safe, reliable, economical and practical sound barrier design is formed.

The invention discloses a rolling device for railway roadbed construction filler, and relates to the technical field of soil compaction. The rolling device for the railway roadbed construction filler comprises a device main body, the device main body comprises a vehicle body, a mounting frame connected with the vehicle body and a grinding roller connected with the mounting frame; the device main body further comprises two groups of auxiliary rolling mechanisms for rolling the edge and the side slope of the roadbed. According to the rolling device for the railway roadbed construction filler, the roadbed edge and the side slope are recognized through the recognition mechanism, the auxiliary rolling wheel extends out through the adjusting mechanism and the rotating mechanism according to the recognition result, the inclination angle of the auxiliary rolling wheel is adjusted, the auxiliary rolling wheel makes contact with the roadbed edge or the side slope, and pressure is applied under the action of the pressure applying mechanism; according to the roadbed edge rolling device, rolling operation of a roadbed edge pre-pressing locking edge or a side slope is achieved, the roadbed edge rolling device is more convenient and faster, the filler can be prevented from sliding and collapsing towards the side slope, rolling blind areas can be avoided, and the rolling efficiency and quality are improved.

The present invention belongs to the field of railway roadbed, and particularly relates to the field of newly constructed railway roadbeds next to existing railways, and particularly relates to an adjustable railway roadbed structure and construction method. The roadbed structure is arranged at the side slope position of any side of the existing line, and includes a roadbed filler, as well as a force transmission component, a balancing base plate and a connector buried in the roadbed filler. The force transmission component, the balancing base plate and the connector form a triangular structure. The force transmission component is arranged on the side slope of the existing line subgrade, and the balancing base plate is arranged on the stratum adjacent to the corresponding side slope. By adjusting the length of the connector, the load of the roadbed filler on the existing line subgrade can be reduced. The adjustable form is used to adapt to the slopes of existing line subgrades with different side slope rates. The force on the existing line embankment is reduced, and the lateral or vertical deformation of the existing line subgrade caused by the factors of the railway roadbed structure is reduced.

The utility model discloses a level meter for monitoring vertical displacement of a roadbed, and relates to the technical field of roadbed monitoring. The road monitoring system comprises a road subgrade and further comprises a monitoring assembly, the monitoring assembly comprises pile bodies linearly distributed on the slope surface of the road subgrade, photoelectric sensors are installed at the top ends of the pile bodies, and the multiple photoelectric sensors are linearly distributed along the axis of the pile bodies. A laser measuring instrument is replaced by the monitoring assembly, and compared with the prior art, the device has the advantages of being not prone to being affected by the external environment, high in vertical displacement detection accuracy and the like and has practicability.

This invention discloses a modeling method for layered soft soil subgrades reinforced with pile foundations under simulated seismic loading, belonging to the field of seismic numerical simulation in geotechnical engineering. This method constructs a multi-field coupled numerical model based on a finite element platform, defines the contact mechanisms at the pile-soil and reinforced-subgrade interfaces, and completes the construction of in-situ stress equilibrium and initial pore water pressure fields. Static results are output through fill-consolidation coupling analysis. Distributed viscoelastic artificial boundaries are automatically constructed using Python scripts, and seismic waves are converted into equivalent nodal loads using wave theory. Multi-physics field connections between static and dynamic analysis boundaries are achieved, and core response parameters such as embankment settlement and pile-soil stress are output through implicit dynamic analysis. This invention considers the seismic wave propagation effect in layered soils, reduces spurious oscillations caused by the transformation of static and dynamic boundaries, and improves simulation accuracy and efficiency. It is suitable for seismic design and analysis of transportation infrastructure in soft soil areas.

The present application relates to a kind of overhead line support adjustment device. Currently overhead line support is mainly fixed on concrete foundation by anchor bolt, or directly embedded in subgrade, the flange of upper support is connected with anchor bolt on lower foundation, without the function of adjusting support inclination, when there is subgrade deformation, support inclination cannot be adjusted;Support may occur to fall in installation and unexpected situation. The present application includes base and spherical structure, spherical structure is arranged in the interior of base;Base includes upper base and lower base, the lower end of upper base and the upper end of lower base are oppositely arranged and located in vertical direction;Spherical structure includes upper cylinder, ball and lower cylinder, upper cylinder, ball and lower cylinder are integrally formed. The present application can greatly adjust the inclination of support in any direction, solve the problem of overhead line support inclination caused by subgrade deformation, thereby improve overhead line parameter, improve the reliability of overhead line system, reduce the maintenance workload of overhead line system, save operating cost.

The invention relates to the technical field of roadbed engineering monitoring, in particular to a roadbed engineering settlement deformation monitoring device and method, and the device comprises an optical fiber sensor network, a data collection module, a signal processing module, a model matching module, a frequency analysis module, a data fusion module, an early warning trigger module and a prediction report module. The optical fiber sensor network is deployed in a roadbed to collect an optical signal delay sequence, fluctuation characteristics are extracted through data collection and signal processing, settlement acceleration risks are judged through model matching, the speed trend is determined through frequency analysis, historical and real-time data are integrated through data fusion, an alarm is triggered when an early warning module exceeds a threshold value, and a risk assessment report is generated through a prediction module. According to the device, roadbed three-dimensional global monitoring and full-process automation are achieved, monitoring blind areas are eliminated, early warning lag is shortened, and accurate support is provided for roadbed stability operation and maintenance.

According to the high-speed railway subgrade settlement distributed monitoring method and system, the high-speed railway subgrade settlement distributed monitoring method has the advantages that the technology is mature, the precision is high (millimeter level), layered settlement of different soil layers can be measured, data are visual and reliable, and the precision is extremely high (can reach 0.1 mm level); the optical fiber is a sensor and a transmission medium and can continuously sense deformation of any point along an optical fiber path, the spatial resolution can reach the meter level or even the centimeter level, the anti-interference performance is high, the corrosion resistance and the electromagnetic interference resistance are achieved, the long-term stability is good, and the real distribution is achieved; the method is suitable for long-term monitoring, can realize multi-parameter monitoring (combining with different demodulation technologies and simultaneously monitoring settlement, strain, temperature and the like), and the monitoring system has full-time-domain continuity: 7 * 24-hour uninterrupted monitoring, which is far better than the frequency and full-space distribution of traditional manual inspection.

The present application relates to a kind of rural road pavement widening construction methods in rainy area, including the following steps, the material component, density and moisture content of widening section subgrade should be same with the material component, density and moisture content of old roadbed same level layer, the side middle part of old road cement concrete layer is drilled and planted with reinforcement with interval distance, adjacent planted reinforcement interval is 40-50cm, then a layer of SBS anti-cracking paste is uniformly arranged along joint;1-1.5cm thick rubber stress absorbing layer is spread on the upper end surface of new and old road cement concrete layer;With new asphalt, regenerating agent material, graded RAP material, aggregate and mineral powder are mixed in hot state, then asphalt concrete surface layer is paved on the upper end of rubber stress absorbing layer, and the thickness is 5-8cm.The present application prevents water damage caused by rain, delays damage at joint, reduces the probability of crack occurrence, and improves the service performance and durability of pavement.

The utility model belongs to municipal engineering technical field, concretely relates to a kind of shallow soft soil subgrade treatment combination structure in narrow site, comprising: replacement boundary line, roadbed replacement base layer, replacement demarcation line, ground line, excavation replacement slope line, cement soil mixing pile solid pile, cement soil mixing pile empty pile, cement solidification area and replacement granular material.Excavation replacement slope line starts from replacement demarcation line, and ends in replacement boundary line;Cement soil mixing pile solid pile is located below the area inside replacement boundary line road, its pile bottom is below replacement demarcation line, and pile top is cut off in excavation replacement slope line;Cement soil mixing pile empty pile is only as the "virtual section" that cement soil mixing pile solid pile body extends upwards;Cement solidification area is the area that replacement boundary line, cement soil mixing pile solid pile bottom and excavation replacement slope line, ground line are enclosed to form.The utility model can reduce the range of slope excavation, reduce the influence of excavation replacement subgrade treatment to surrounding environment and building structures.