KR102220477B1 - Apparatus and Control Method for Retaining well construction using reverse analysis - Google Patents

Abstract

Measures the actual amount of deflection caused by changes in earth pressure according to changes in environmental conditions, and adjusts the tension of the HICT earth-blocking method to reduce the amount of deflection when the measured amount of deflection exceeds the allowable amount of deflection to improve the problem of maintenance through measurement of the current earth capping method. Calculate the additional pressure value for the purpose and analyze the design and measurement data according to the construction control method to calculate the minimum pressure result value so that the amount of deflection is within the set standard range. The effect of providing an inverse analysis algorithm and application program for the development of an information-based construction management system for controlling, predicting, and coordinating soil block construction that can timely respond to changes in site conditions is derived.

Description

Apparatus and Control Method for Retaining well construction using reverse analysis}

The present invention relates to a soil barrier construction information construction apparatus and method, and more particularly, to a soil barrier construction information construction apparatus and a control method using a reverse analysis technique.

Inverse analysis is a concept opposite to general pure analysis, and is useful for evaluating modeling parameters and adequacy of numerical analysis models using monitoring results. Net analysis is an analysis method that calculates displacement, stress, or strain due to external loads based on the set initial conditions and ground properties, whereas reverse analysis is an analysis method that obtains initial stress, ground properties and boundary conditions from measured displacement, stress, and strain. to be. Inverse analysis is the process of obtaining unknown parameters of the numerical analysis model so that the numerical analysis results match the field measurement results. That is, inverse analysis is a process of estimating design variables from response variables and is performed based on net analysis.

The inverse analysis technique proceeds to a stress analysis step to determine the distribution of stress, strain, and displacement in a problem, and an optimization step to minimize the nonlinear error function by analyzing the difference between the value measured in the field and the value obtained from the stress analysis as an error. do.

According to the method of obtaining the solution, there are two methods: the inverse method, which obtains the design constant from displacement or stress, which is the result of the positive analysis, and the direct method, which finds the design constant while adjusting design variables using positive analysis. The direct method is divided into a deterministic method and a probabilistic method according to the method of finding a solution.

On the other hand, a full-scale study on the earth pressure acting on the earthen wall was started by coulomb (1776). Coulomb (1776) and Rankine (1857) assumed the fracture surface to be a flat surface and proposed the active earth pressure and passive earth pressure in the limit state acting on the rigid wall. Terzaghi, Peck (1967), Tschebotarioff (1973), etc., through experiments, proposed empirical earth pressure distribution curves according to the types of soil layers that can be used in the cross-sectional design of the retaining wall, and many empirical earth pressure distribution curve equations for the analysis of ductile walls were proposed. Became (Das, 1998).

The analysis using the earth pressure distribution or the empirical earth pressure distribution curve according to the classical theory is still widely used in the design of the earth retaining structure, but since it is an analysis considering only the limiting conditions, it is impossible to consider the various earth pressure distributions that change at each construction stage. There is a disadvantage that the displacement of the retaining wall cannot be predicted.

Since the 18th century, various researches have been conducted for the development of numerical models, but an analysis method that can consistently and accurately predict the behavior of the structure has not yet been established. This is because a simple numerical model is limited because there are various variables that cannot be predicted in the actual field and the cause is difficult to determine.

In addition, even if a complex and sophisticated numerical model is used, it is necessary to consider determining an appropriate input value. As a technique to solve this problem, the'reverse analysis technique', which inversely estimates the input value of a numerical model from field measurements through the actual structural behavior measured from the 1970s, began to be applied.

Research to apply the reverse analysis technique to the geotechnical field was led by Eykhoff (1974) and Goodwin (1977), and since the 1980s, reverse analysis theories and techniques have developed rapidly. Representatively, Sakurai et al.(1981, 1983), Gioda et al.(1981), Yang et al.(1981, 1983), Ledesma et al.(1996) applied the optimization technique of inverse analysis to ground-structure interaction problems such as tunnels. Researchers such as et al. (1987) and Yang et al. (2001) applied inverse analysis to viscoelasticity problems, and the application of the inverse analysis technique in the field of geotechnical excavation has been mainly applied to problems such as rock mass and tunnels.

Due to the nature of the ground excavation soil barrier construction, it is impossible to consider various earth pressure distributions that change according to changes in site conditions. In addition, since it is impossible to predict the displacement of the barrier wall, a measurement management system has been introduced and constructed to understand the structural behavior and influences around the site.

However, the existing measurement management system analyzes qualitative structural behavior by empirical judgment on measurement data measured during construction. It is only introduced for the purpose of management of absolute reference values for design, understanding of the current state, and construction management, such as checking the safety of the site.

KR 10-1742110 B1 KR 10-2011-0136998 A

The present invention is derived from such a technical background, by analyzing design and measurement data, evaluating the quantitative safety in the current state and predicting future safety, and controlling, predicting, and adjusting the soil barrier construction that can timely respond to changes in site conditions. Its purpose is to propose an informatization construction apparatus and method for earth protection construction that can provide an inverse analysis algorithm and application program for the development of an information construction management system.

The present invention for achieving the above object includes the following configuration.

That is, in the method for controlling the construction of information on the soil barrier according to an embodiment of the present invention, the information grasping unit grasping the tension force hydraulic information and the actual sagging amount information generated by the earth pressure change, and the equation guide unit changing the load and tension hydraulic values. Analyzing the correlation between load load, tension hydraulic pressure, and deflection amount while giving, and inducing an equation by reflecting the actual deflection amount and tension force hydraulic information of the known belt length from the correlation equation calculated according to the analysis result. When the actual deflection amount exceeds the allowable deflection amount, calculating the additional tension hydraulic pressure for tension control so that the actual deflection amount is within the allowable deflection amount based on the derived relational formula, and the step of inputting the calculated additional tension hydraulic pressure by the hydraulic input unit Includes.

On the other hand, the earth protection construction information construction device according to an embodiment of the present invention is an information grasping unit for grasping the information on the amount of deflection of the actual strip caused by the tension pressure information and the earth pressure change, the load load, while giving changes to the load and tension hydraulic values. An equation derivation unit that analyzes the correlation between the tension pressure and the amount of deflection, and derives an equation by reflecting the actual deflection amount and the tension force hydraulic information of the grasp from the correlation equation calculated according to the analysis result, and the actual deflection determined by the information grasp unit In the case of exceeding the allowable deflection amount, a tension force hydraulic calculation unit that calculates an additional tension force hydraulic pressure for adjusting the tension force based on the relation derived from the equation guide unit, and a hydraulic input unit that inputs the additional tension force hydraulic pressure calculated from the tension force hydraulic pressure calculation unit. Characterized in that.

According to the present invention, it is a role for the development of an informational construction management system for controlling, predicting, and coordinating soil block construction that can analyze design and measurement data to evaluate quantitative safety in the current state and predict future safety, and respond in time to changes in site conditions. An effect that can provide an analysis algorithm and application program is derived.

1 is an exemplary view for explaining the allowable amount of deflection in the information-based construction control method of the earthing construction according to an embodiment of the present invention,
2 is an exemplary view for explaining the vertical component force applied to the strand in an embodiment of the present invention,
3 is a graph of correlation between tension and deflection for comparing the amount of deflection between the belt length theory calculation equation and the experimental data in the information-oriented construction control method for the earthing construction according to an embodiment of the present invention,
FIG. 4 is a graph of correlation between tension and deflection for comparing the amount of deflection between the computational analysis of the belt and experimental data in the information-oriented construction control method of the earthen barrier construction according to an embodiment of the present invention;
5 is a graph for analyzing the amount of deflection due to the tension hydraulic pressure and the reloading load in the information-oriented construction control method of the earthen protection construction according to an embodiment of the present invention;
Figure 6 is a graph of the correlation between the load and the amount of deflection in the information-based construction control method of the earth protection construction according to an embodiment of the present invention,
FIG. 7 is a graph showing the correlation between the load-deflection amount in the load load 5tonf (50kN) and the initial tension hydraulic pressure;
FIG. 8 is a graph showing the correlation between the load-deflection amount at a load load of 10 tonf (100 kN) and a tension force hydraulic pressure of 20 tonf (200 kN).
9 is a trend line analysis graph of LG with high reliability,
10 is a graph for analyzing the correlation between the tension hydraulic pressure and the initial deflection amount,
11 is an exemplary view for explaining a method of controlling the construction of information-based earthing construction according to an embodiment of the present invention;
12 is a flow chart of a construction control method for information-based construction of a soil barrier according to an embodiment of the present invention,
13 is a block diagram of an information construction device for earth protection construction according to an embodiment of the present invention.
14 is a load-load correlation graph in the information-oriented construction apparatus for earthing construction according to an embodiment of the present invention,
15 is a hydraulic pressure-initial deflection correlation graph in the information construction device for earth protection construction according to an embodiment of the present invention;
FIG. 16 is an exemplary view of an option value input screen in an information construction device for earth protection construction according to an embodiment of the present invention;
FIG. 17 is an exemplary view of a graph that is schematically illustrated as a result of reverse analysis in an information construction apparatus for earth protection construction according to an embodiment of the present invention.

It should be noted that the technical terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. In addition, the technical terms used in the present invention should be interpreted as generally understood by those of ordinary skill in the technical field to which the present invention belongs, unless otherwise defined in the present invention, and is excessively comprehensive. It should not be construed as a human meaning or an excessively reduced meaning.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The construction apparatus and method for earth protection construction information according to an embodiment applies a tension control and adjustment device as a method of introducing prestress (tension force) to a steel strand in order to respond to external force behavior (earth pressure). By offsetting/recovering the deformation amount and stress of the strip, it is possible to maintain high safety by applying active resistance even if the earth pressure fluctuates in real time.

In addition, the construction apparatus and method for earth protection construction information according to an embodiment can adjust the amount of deformation and stress of the strip by observing the behavior of external force and adjusting the tension, and integrated information management for hydraulic adjustment for measurement analysis and introduction of tension. This is advantageous in securing high safety by enabling timely response to changes in earth pressure. In addition, it is possible to increase the rigidity by applying a double composite cross section to improve structural safety.

In one embodiment, an experiment was performed to analyze the correlation between the tension force of the belt length and the amount of deflection according to the load by producing a real test object. In addition, by applying the experimental results, the correlation between tension pressure and deflection amount of the belt length according to the load (external force) is analyzed, and when a problem is predicted, the amount of deformation is offset/recovered through tension pressure control to support timely response.

According to an embodiment of the present invention, when the measured deflection exceeds the allowable deflection range, the minimum additional tension hydraulic pressure required so that the deflection of the final strip falls within the allowable deflection range is calculated. That is, the construction apparatus and method for earth protection construction information according to an embodiment of the present invention is a technology that supports adjusting the amount of deformation for offset/recovery through immediate tension pressure adjustment at the site. It is possible to evaluate the safety of the current state of the earthen block structure that changes in real time and respond in time to changes in site conditions. In particular, the inverse method of inverse analysis techniques is applied to develop an inverse analysis program.

When the earth pressure increases due to reverse analysis or when the permissible displacement of the strip (displacement within the allowable stress) or more occurs through the field measuring device, a structural safety review of the strip must be carried out. However, according to the information construction apparatus and method for earthing construction according to an embodiment of the present invention, since it is a system that secures structural safety through the tension of the strand, the displacement caused by the external force must be controlled through the tension of the strand, so the similarity between the theoretical formula and the actual behavior Need to be verified.

To this end, an experimental value for comparison and review of "the displacement value of the belt length due to the introduction of the tension force calculated through the theoretical equation" and the "displacement value of the belt length generated after the tension force is introduced into the actual strand" is required. That is, through the analysis of the experimental results, an inverse analysis algorithm and application program can be proposed that can calculate the tension force of the strand to cope with the amount of deformation of the strip due to external force (earth pressure).

1 is an exemplary diagram for explaining an allowable amount of deflection in a method for controlling an information-oriented construction of a soil barrier according to an embodiment of the present invention.

In one embodiment, assuming that the load acts in the center of the strip based on the allowable stress of the strip length steel, the deflection criterion of the strip length, that is, the allowable band length deflection is calculated. At this time, the design specifications of the strip are as shown in FIG. 1.

As can be seen from FIG. 1, the belt length is a structure in which H-Beam (300x300x10x15) is connected with bolts, and can be divided into composite and non-composite cross sections. At this time, the conditions for calculating the allowable deflection for the design specifications are shown in Table 1.

division 300*300*10*15(1ea)
standard 300*300*10*15(2ea)
<Non-composite section> 2-300*300*10*15
<Composite section> Steel grade SS 400 SS400 SS400 Modulus of elasticity 205,0000MPa 205,000MPa 205,000 MPa A(mm ² ) 11,980 23,960 23,960 I _{weak axis} (mm ⁴ ) 67,500,000 135,000,000 135,000,000 I _{strong shaft} (mm ⁴ ) 204,000,000 408,000,000 947,100,000

During the calculation of the allowable stress of steel, the minimum allowable stress is applied in consideration of structural safety.

Here, the allowable flexural tensile stress is 140 MPa, and the allowable flexural tensile stress during construction is 1.5 * 0.9 * 140 = 189 MPa.

At this time, the allowable stress increase factor of temporary structure is 1.5, the allowable stress correction factor of steel is 0.9, and the yield stress is 235 MPa.

Calculate the bending moment to calculate the allowable deflection of the belt length. Here, the equation for calculating the bending moment (M) is as follows.

[Equation 1]

이다. therefore

to be.

Applying this to calculate the bending moment, in the case of a composite section,

이다.

to be.

In addition, if the whip moment is calculated for a non-composite section,

이다.

to be.

And the formula for calculating the allowable deflection of the belt length is as follows.

[Equation 2]

이다. 이는 실험체 띠장의 지지점 간 거리이다. here,

to be. This is the distance between the support points of the specimen belt.

Applying this value and calculating the allowable deflection of the band length, in the case of a composite section,

이고,

ego,

In the case of a non-composite section,

이다.

to be.

As a result of calculating the allowable band length deflection according to the above-described process, 8.594 mm is calculated for both the composite section and the non-composite section. Therefore, 8.594mm may be applied to the allowable strip length deflection during the reverse analysis process in the soil barrier construction informational construction control method according to an embodiment.

In this embodiment, a Vibrating Wire Sensor for detecting the elongation of the strand and a Linear Gauge (mm) for measuring the amount of deflection of the strip are installed in the strip in order to detect the low settling amount of the strip according to the tension of the strand. do.

And it is possible to grasp the actual deflection information measured with a linear gauge.

First, an initial tension force of 3 tonf (about 30 kN) is loaded for each strand in order to position the strand on the strip.

And in order not to reflect the measured value due to the initial tension force introduction, the vibrating wire sensor and the linear gauge are zero-adjusted. That is, the rise of the linear gauge due to the initial tension force introduction may not be included.

And the hydraulic load for introducing tension to each strand is 6tonf (about 60kN) load (2nd), 9tonf (about 90kN) load (3rd), 12tonf (about 120kN) load (4th), 15tonf (about 150kN) load (5th), 18tonf (about 180kN) load (6th) sequentially increasing the value of the vibrating wire sensor and linear gauge.

When examining the amount of deflection due to tension hydraulic pressure through the belt length theory calculation formula, it is assumed that the vertical component force by the tension hydraulic pressure acts on the center of the belt length and the amount of deflection occurs.The theoretical calculation formula and the component force calculation by the tension force are as follows.

The theoretical calculation formula is as follows.

Here, E = 200,000 MPa, I (non-synthetic) = 408,000,000 mm ⁴ , I (synthetic) = 947,100,000 mm ⁴ and L = 6,020 m.

The component force by tension is shown in Table 2 below.

division Tension (kN) Horizontal component force (kN) Vertical component force (kN) 2nd (60kN tension load) 280.7 278.8 32.5 3rd (90kN tension load) 440.4 437.4 51.0 4th (120kN tension load) 558.6 554.8 64.7 5th (150kN tension load) 699.7 695.0 81.0 6th (180kN tension load) 843.9 838.2 97.7

And the results of the deflection calculation considering the non-composite cross-sectional characteristics are shown in Table 3 below.

division Vertical component force (kN) Theoretical value
Deflection (mm) Experimental value
Deflection (mm) Experiment-Theory Difference
Deflection (mm) 2nd (60kN tension load) 32.506 1.811 1.647 -0.164 3rd (90kN tension load) 50.999 2.841 3.494 0.653 4th (120kN tension load) 64.687 3.603 5.171 1.568 5th (150kN tension load) 81.026 4.513 7.004 2.491 6th (180kN tension load) 97.725 5.443 8.808 3.365

Here, the vertical component force was applied to examine the amount of deflection.

The results of calculating the amount of deflection considering the composite cross-sectional characteristics are shown in Table 4 below.

division Vertical component force (kN) Theoretical value
Deflection (mm) Experimental value
Deflection (mm) Experiment-Theory Difference
Deflection (mm) 2nd (60kN tension load) 32.506 0.780 1.647 0.867 3rd (90kN tension load) 50.999 1.224 3.494 2.270 4th (120kN tension load) 64.687 1.552 5.171 3.619 5th (150kN tension load) 81.026 1.944 7.004 5.060 6th (180kN tension load) 97.725 2.345 8.808 6.463

The vertical component can be calculated by loading the unit tension hydraulic pressure as in the indoor experiment and modeling in the same way as the stranded wire installation type. And the calculated vertical component force can be analyzed by loading it as a vertical component load in the belt length modeling.

At this time, the computational analysis may be performed by the MIDAS-Civil program, which is a common analysis program, and a frame element with 6-character derivation may be applied.

2 is an exemplary diagram for explaining a vertical component force applied to a strand in an embodiment of the present invention.

As shown in Fig. 2, the vertical component force and the amount of deflection are calculated and shown in a table by the computational analysis for the strand to which the tension force is applied. "+" indicates an upward force, "-" indicates a downward force, and vertical component force was applied to examine the amount of deflection.

Table 5 shows the calculation of the vertical component force by the tension applied to the strand.

division Tension (kN) Unit vertical component force (kN) Vertical component force due to tension (kN) Outer-1 Outside-2 Inside Outer-1 Outside-2 Inside Secondary 280.7 -0.255 0.183 0.145 -71.579 51.368 40.702 3rd 440.4 -112.302 80.593 63.858 4th 558.6 -142.443 102.224 80.997 5th 699.7 -178.424 128.045 101.457 6th 843.9 -215.195 154.434 122.366

To review the amount of deflection applied to the vertical component force, the vertical component force is loaded into the belt length modeling computational data, and the non-composite section and the composite section can be reviewed for modeling. In the case of non-composite sections, when applying rigid link and link degree of freedom, the load is transmitted and the moment is not transmitted, and the beam is connected. In addition, in the case of the composite section, the beam can be connected by selecting to transmit the load and moment when applying a rigid link and applying a link degree of freedom.

FIG. 3 is a graph showing a correlation graph of tension force and deflection amount for comparison of deflection amount between the belt length theory calculation formula and experimental data in the information-oriented construction control method for the earthen barrier construction according to an embodiment of the present invention.

FIG. 4 is a graph showing a correlation graph of tension and deflection for comparing the amount of deflection between the computational analysis and experimental data of a belt length in an information-oriented construction control method for a dirt barrier construction according to an embodiment of the present invention.

Looking at the theoretical calculation equation and the experimental result of FIG. 3, the amount of deflection at the load of 6tonf (about 60kN) secondary tension hydraulic pressure applied to the non-synthetic cross section is similar to the experimental result, but it can be seen that the difference in the amount of deflection increases as the tension hydraulic pressure is added thereafter . In particular, the difference in the amount of deflection of the composite section appears larger than that of the non-composite section.

In addition, as a result of examining the computational analysis and experimental results of FIG. 4, it can be seen that the difference in the amount of deflection is smaller than that of the theoretical calculation formula and the experimental results. However, contrary to the theoretical calculation formula, the difference in the amount of deflection was greatest at the second tension hydraulic pressure, that is, 6tonf (about 60kN) load. And it can be seen that the difference is smaller as the hydraulic pressure of the additional tension is introduced. The computational analysis result also shows that the difference in the amount of deflection of the composite section is larger than that of the non-composite section, similar to the result of the theoretical equation.

That is, the theoretical calculation results, the computational analysis results and the experimental results were different from each other, and these results may have been caused by errors due to the failure of the bolt of the test object and loss of tension due to elastic contraction of the fixing part during tension. have.

Through the actual production of the strip, it is possible to analyze the theoretical value, the tension of the stranded wire, and the result according to the loading load.

To this end, in one embodiment, 6 Vibrating Wire Sensors for detecting the elongation of the strands and 3 Linear Gauges (mm) for measuring the deflection of the strips are installed on each strand of the strip. And while loading the tension force, measure the elongation of the strand and the sag of the strip.

First, a tension force of 3 tons (about 30 kN) is applied for each strand in order to place the strand on the strip without being loose. In this process, a 1.1mm rise occurs due to the introduction of the initial tension force, but in order to prevent the measured value of the initial tension force from being reflected in the experimental results, a Vibrating Wire Sensor (VW) and a linear gauge for measuring the amount of deflection of the belt length (Linear) Gauge, LG) to zero.

And the experimental measurement process is repeated experiment/measurement while increasing the tension force and the loaded load in one cycle of "Tensile load => Load load => Load removal". As a result of the experiment, the equation is derived through correlation analysis of load, tension pressure and deflection at 20tonf, 40tonf, 60tonf, 80tonf, and 100tonf.

More specifically, the experimental measurement process is 3tonf (1st: initial tension) → VW/LG zero point adjustment → 5tonf (load load) → VW/LG measurement → load removal → VW/LG measurement → 20tonf (2nd: tension load) → VW/LG measurement → 10tonf (load load) → VW/LG measurement → load removal → VW/LG measurement → 40tonf (3rd: tension load) → VW/LG measurement → 15tonf (load load) → VW/LG measurement → load Removal → VW/LG measurement → 60tonf (4th: tension load) → VW/LG measurement → 20tonf (load load) → VW/LG measurement → load removal → VW/LG measurement → 80tonf (5th: tension load) → VW /LG measurement → 25tonf (load load) → VW/LG measurement → load removal → VW/LG measurement → 100tonf (6th: tension load) → VW/LG measurement → 30tonf (load load) → VW/LG measurement → load removal → VW/LG measurement → End process.

In other words, the derivation of the equation is the step of (a) applying an initial tension force of 3 tons and zeroing the Vibrating Wire Sensor for detecting the elongation of the strand and the Linear Gauge (mm) for measuring the deflection of the strand. , (b) 5tonf load and the step of measuring the elongation of the strand with a vibrating wire sensor, measuring the deflection of the strand with a linear gauge, (c) removing the load and measuring the elongation of the strand with a vibrating wire sensor, and using a linear gauge Measuring the amount of deflection of the intestine, (d) loading the tension force, detecting the elongation of the strand with a vibrating wire sensor, and measuring the deflection of the strand with a linear gauge, (e) loading the load and measuring the elongation of the strand with a vibrating wire sensor Measuring the deflection of the strip with a linear gauge, (f) removing the load, detecting the elongation of the strand with a vibrating wire sensor, measuring the deflection of the strip with a linear gauge, and (g) varying the values of the tension and load (d Steps) to (f) are repeated.

In other words, the process of loading the tension while varying the values of the tension and the load, detecting the elongation of the strand with a vibrating wire sensor, measuring the deflection of the strand with a linear gauge, loading a load and detecting the elongation of the strand with a vibrating wire sensor, and a linear gauge The process of measuring the amount of deflection of the belt length with a furnace, the process of removing the load, measuring the amount of elongation of the stranded wire with a vibrating wire sensor, and measuring the amount of deflection of the strip with a linear gauge are sequentially repeated.

5 is a graph for analyzing the amount of deflection due to the tension hydraulic pressure and the reloading load in the information-oriented construction control method of the earthen block construction according to an embodiment of the present invention.

In the graph shown in FIG. 5, a section in which the amount of deflection is marked with a "+" sign means that deflection occurs due to a load. The section where the amount of deflection is marked with a "-" sign means that a spring occurs in the opposite direction by introducing a tension hydraulic pressure. As a result of the experiment, it can be seen that the amount of deflection increases when the load is loaded, and returns to the previous state when the load is removed, and when the tension hydraulic pressure is introduced, a soaring occurs.

That is, as a result of the analysis of the amount of deflection when the tension force is introduced and the amount of deflection when the tension force and load are applied at the same time, an error in the test result occurs in some sections, but the effect is negligible, so the test result is reliable.

In the graph of FIG. 5, as a result of measuring the amount of deflection in the section "A", the cause different from the deflection pattern in the other section is due to the manufacturing error of the test object occurring during loading after the initial tension force is introduced. As an example, the manufacturing error may be a factor of the initial deformation of the bolt fastening section and the anchorage section of the stranded wire.

6 is a graph illustrating a correlation between a load load and a deflection amount in a method for controlling an information-oriented construction of a soil barrier according to an embodiment of the present invention.

As can be seen from the graph of FIG. 6, as the load increases, the amount of sag increases, and when the load is removed, the amount of sag decreases. For section "B", the amount of deflection in the section where the load is removed may be the amount of residual deformation generated due to factors such as clearance between bolts and bolt holes, hydraulic loss, etc. during the production of the specimen, but the effect is insignificant.

FIG. 7 is a graph showing the correlation between the load load-deflection amount in the load load 5tonf (50kN) and the initial tension hydraulic pressure.

FIG. 8 is a graph showing a correlation between a load-delay amount at a load load of 10 tonf (100 kN) and a tension pressure of 20 tonf (200 kN).

It can be seen that a similar graph between LG1 and LG2 is displayed based on the graphs shown in FIGS. 7 and 8. That is, by analyzing the correlation between the load and the amount of deflection while varying the load and tension hydraulic values, it is possible to identify the LG with high reliability as a result of the experiment. In other words, it is possible to obtain an experimental value by reflecting the measured value of LG having high reliability. And through the analysis of the load/tension hydraulic pressure reflecting the measured value of LG with high reliability, an equation for the load load and deflection amount can be derived.

9 is a graph of LG's high reliability trend line analysis.

As a result of the analysis in the graph shown in FIG. 9, it can be seen that the R2 value is very similar to 0.99 or more, indicating that the reliability of the equation is very high. That is, an equation for the load and deflection can be derived through the analysis of the load and the tension hydraulic pressure.

10 is a graph for analyzing the correlation between the tension pressure and the initial deflection amount.

It is possible to analyze the amount of deflection for the tension hydraulic pressure by examining the initial deflection amount (rising) according to the introduction of the tension force hydraulic pressure. As a result of the reliability analysis of the experimental results and the trend line, R2 is 0.99 or higher, and the reliability of the equation is very high. That is, through the analysis result of the graph shown in FIG. 10, a correlation equation between the amount of deflection and the tension force hydraulic pressure can be derived. Using this, it is possible to infer the magnitude of the hydraulic load corresponding to the amount of deflection generated in the strip.

11 is an exemplary view for explaining a method of controlling the construction of information-oriented earthing construction according to an embodiment of the present invention.

In the method of controlling the construction of information-oriented earthing construction according to an embodiment of the present invention, the tension force hydraulic information for introducing the tension force into the belt and information on the measured amount of deflection of the belt may be received.

Therefore, it is necessary to analyze the tension hydraulic pressure and the amount of deflection through the reverse analysis program, and calculate the additional tension hydraulic pressure so that the amount of deflection is within the allowable amount of deflection in the current state.

For this purpose, the correlation equation is calculated by analyzing the correlation between load-deflection amount for load/inflow load using experimental data. The equation calculated here has a high reliability of R2 of 0.99 or higher when compared with the experimental results. By analyzing each equation with high reliability, when the deflection exceeds the allowable deflection range, an additional tension hydraulic pressure can be derived so that the deflection falls within the allowable deflection range.

12 is a flow chart of a method for controlling construction information of a soil barrier construction according to an embodiment of the present invention.

In the method of controlling the construction of information-oriented earthwork construction according to an embodiment of the present invention, information on the tension force hydraulic pressure for introducing the tension force into the belt and information on the amount of deflection of the measured belt may be collected (S100). In other words, the information on the amount of deflection of the actual belt field caused by the change in the tension force and hydraulic pressure is identified.

And based on the collected data, it creates a graph suitable for the data. At this time, according to the load-load correlation analysis, it is possible to generate a tension force hydraulic pressure-sag amount graph (S110). In other words, while changing the load and tension hydraulic values, use the experimental data to analyze the correlation of “load-deflection” for the load/hydraulic load, and reflect the information collected from the correlation equation calculated according to the analysis result. To derive the equation.

The construction control method for information-oriented construction of a soil barrier according to an embodiment may analyze the correlation between the load load, the tension pressure, and the amount of deflection by diagramming a load-load correlation graph and a hydraulic pressure-initial deflection correlation graph.

According to an aspect of the present invention, an equation can be derived through an analysis of the correlation analysis of the load, tension pressure, and deflection amount at 20tonf, 40tonf, 60tonf, 80tonf, and 100tonf as a result of the experiment.

In addition, it is possible to infer a virtual quadratic equation based on the derived equation by receiving the tension hydraulic pressure and applying the tension hydraulic pressure and the amount of deflection received. And by inverting the inferred quadratic equation by applying the received deflection amount, it is possible to find a suitable load load (X) value.

After that, when the field measured deflection exceeds the allowable deflection standard (S120), the additional tension hydraulic pressure is calculated so that the field measured deflection is within the allowable deflection standard (S130). In other words, when the measured actual deflection exceeds the allowable deflection, the additional tension hydraulic pressure for tension control is calculated so that the actual deflection is within the allowable deflection based on the derived equation.

And the calculated additional tension hydraulic pressure is applied to the field (S140). Accordingly, the result value can be calculated so that the amount of deflection is within the set reference range.

In other words, when the received field measurement deflection exceeds the allowable deflection standard, the required minimum pressure result value (total tension hydraulic pressure, additional tension hydraulic pressure, load load) must be calculated to be within the standard range. It goes through tens of thousands of loop statements to calculate the result, and finds an equation in which the difference between the actual measured deflection amount and the allowable deflection amount is within the error range (set as 0.01). And the final minimum pressure result value including at least one of the total tension hydraulic pressure, the additional tension hydraulic pressure, and the loading load may be displayed on the graph.

13 is a block diagram of an information construction device for earth protection construction according to an embodiment of the present invention.

The inverse analysis program performed in the soil barrier construction informational construction apparatus according to an embodiment measures the actual amount of deflection caused by a change in earth pressure according to changes in environmental conditions. In addition, in order to improve maintenance problems through the measurement of the current retaining method, when the measured deflection exceeds the allowable deflection (design absolute standard value), the amount of deflection is set by calculating the additional tension hydraulic pressure for the tension control of the HiCT retaining method. It is a program that calculates the result value to be within a standard range.

The operating OS can be run on a Windows-based IBM compatible computer. (WindowXP, Window7, Window8, Window10) As an example, the development language is C++, and the development tool is Microsoft's Visual Studio (MFC).

When data is received after connecting to a serial communication, the earthbreaking construction information construction apparatus according to an embodiment collects data according to an input of a [start calculation] button. And, according to the input of the [Calculation End] button, the minimum pressure result value (total It outputs tension hydraulic pressure, additional tension hydraulic pressure, and loading load).

In addition, the coefficient value of the equation obtained through the analysis of the experimental result in the information construction apparatus for the earthen block construction according to an embodiment can be changed and improved by the user according to the analysis result according to the site condition.

In other words, through the analysis of each experimental data, it is possible to infer a curve equation for another unexperimented tension hydraulic pressure. In addition, it is possible to plot a curve suitable for the data by receiving the tension hydraulic pressure and the amount of deflection.

In addition, when the measured deflection exceeds the allowable deflection range, the total tension hydraulic pressure and additional tension hydraulic pressure to reach the allowable deflection (for reducing the deflection) can be calculated by moving the curve equation vertically and parallel to exist within the allowable deflection range. The allowable deflection range was found to be the same as 8.594mm as a result of the deflection review of the composite and non-composite sections, so for the development of the reverse analysis program, the deflection criterion of the band length is applied within ±8.594mm.

At this time, the allowable deflection standard can be changed within the program.

The time to collect data can be adjusted through the calculation start button and the calculation end button. In addition, among the collected data, the largest amount of deflection is applied and the hydraulic load corresponding to the maximum amount of deflection is applied, and the calculation is performed and output to the communication unit 200.

The communication unit 200 collects the current tension hydraulic pressure and the amount of deflection through a serial cable, for example, and when the collected maximum amount of deflection exceeds the allowable amount of deflection (the design absolute standard value), the required minimum pressure result value so that the amount of deflection is within the set reference range. It is interpreted to encompass a module for transmitting to the serial communication port.

The information grasping unit 210 may grasp the tension force hydraulic information and the actual sagging amount information of the belt length caused by the earth pressure change through the communication unit 200.

In one embodiment, the earthing construction information construction device further includes a Vibrating Wire Sensor for detecting the elongation of the strand and a Linear Gauge (mm) for measuring the amount of sag of the strip, and the information grasping unit 210 ) Can grasp the actual deflection information measured with a linear gauge.

First, the equation inducing unit 220 performs a correlation analysis of the load, tension, hydraulic pressure and deflection amount at 20tonf, 40tonf, 60tonf, 80tonf, and 100tonf through an indoor experiment. And as a result, it is possible to derive an equation representing the correlation between the load, the tension force and the amount of deflection.

After that, a virtual quadratic equation is inferred based on the equation input by the equation inducing unit 220 by applying the tension hydraulic pressure received through serial communication through the communication unit 200 at the site.

In other words, when the received field measurement deflection exceeds the allowable deflection standard, the required minimum pressure result value, that is, total tension hydraulic pressure, additional tension hydraulic pressure, and load load value must be calculated to be within the standard range. The equation derivation unit 220 finds an equation in which the difference between the field measured deflection amount and the allowable deflection amount falls within the error range (set as 0.01) while passing through tens of thousands of loop statements to calculate the result value.

The tension force hydraulic calculation unit 230 applies the field measured deflection amount received through the serial communication through the communication unit 200 and calculates the quadratic equation inferred from the equation induction unit 220 to find a suitable load (X) value. In addition, the tension pressure hydraulic calculation unit 230 calculates the required minimum pressure result value (total tension hydraulic pressure, additional tension hydraulic pressure, load load) to be within the reference range when the field measured deflection received by the communication unit 200 exceeds the allowable deflection standard. do.

The hydraulic input unit 240 transmits the result value through the communication unit 200 so that the hydraulic pressure according to the minimum pressure result value (total tension hydraulic pressure, additional tension hydraulic pressure, and load load) calculated by the tension force hydraulic calculation unit 230 is applied. do.

The equation derivation unit 220 according to an embodiment may analyze the experimental result and display the calculated equation, a reference graph according to the equation, and information on the allowable deflection reference line.

14 is a load-load correlation graph in the information construction apparatus for earthing construction according to an embodiment of the present invention.

At this time, in the case of the allowable deflection, the user can set an appropriate value within 8.594mm. Since the allowable deflection calculated through analysis is 8.594mm, a standard is presented, and the applied allowable deflection can be set to be separately presented next to the standard.

15 is a hydraulic pressure-initial deflection correlation graph in the information construction apparatus for earth protection according to an embodiment of the present invention.

That is, the equation calculated by analyzing the experimental result and the reference graph according to the equation can be schematically illustrated. The graph shown in FIG. 15 is intended to provide information on the analysis result of the correlation between hydraulic pressure and initial sag.

16 is an exemplary view of an option value input screen in an information construction device for earth protection construction according to an embodiment of the present invention.

As shown in Fig. 16, it is possible to run the option window and input/edit the equation coefficient values of the reload-deflection correlation graph and the hydraulic-initial deflection correlation graph as an option value, and the maximum load and limit deflection (allowable deflection ) Input/setting is possible.

That is, the equation coefficients from 20ton to 100ton of the hydraulic load (Press Curve) derived through the analysis of the experimental results in the reloaded load-deflection correlation graph shown in FIG. 14 may be input. It is possible to input the equation coefficient value calculated through the analysis of the experimental results in the hydraulic pressure-initial deflection graph shown in FIG. 15.

In addition, the user can set the range by setting the maximum value of the load load, which is the X axis of the graph. The maximum load load is used as the maximum value when calculating the load load for the received field measurement deflection.

In an embodiment, it is desirable to input a suitable value within 8.594mm of the allowable deflection calculated through analysis. You can enter the time interval to check the disconnection of the serial communication port, and select whether to display a warning message when the serial connection is not connected.

FIG. 17 is an exemplary view of a graph schematically illustrated as a result of an inverse analysis in an information construction apparatus for a soil barrier construction according to an embodiment of the present invention.

In the apparatus for constructing information construction for earthing according to an embodiment of the present invention, when a serial port is connected and a calculation start button is pressed, received data is displayed in a data window. Then, when the Calculation End button is pressed, the maximum deflection amount and the corresponding tension hydraulic pressure are applied among the received data, and when the allowable deflection standard is exceeded, an appropriate tension pressure hydraulic value for immediate deflection reduction is calculated and displayed in the data window and graph.

In the graph of FIG. 17, the blue line represents the measured maximum amount of deflection, and the gray dotted line graph is a graph inferred through a program using a reference equation by applying received data (tension pressure, amount of deflection).

As in the graph shown in Fig. 17, when the measured maximum deflection exceeds the allowable deflection, it is necessary to calculate the minimum additional tension hydraulic pressure and the total tension hydraulic pressure to reduce the deflection in the current state, and the final result calculated through the program is red. It can be represented by a dotted graph.

In one embodiment, in order to satisfy the allowable deflection range criterion, the minimum required additional tension hydraulic pressure is 26.562 tons, and the total tension hydraulic pressure is 58.562 tons. In addition, when the calculated value is normally output, data is transmitted through the communication unit 200.

200: communication unit 210: information grasp unit
220: equation guide unit 230: tension force hydraulic calculation unit
240: hydraulic input

Claims (10)

In the soil barrier construction information construction control method performed in the soil barrier construction information construction device,
Determining, by the information grasping unit, information on the amount of deflection of the actual belt field caused by the tension force hydraulic information and the earth pressure change;
The equation guidance unit analyzes the correlation between the load load, the tension force hydraulic pressure, and the amount of deflection while changing the load load and the tension pressure value based on the information on the amount of deflection of the actual strip, and grasps the information from the correlation equation calculated according to the analysis result. Deriving an equation by reflecting the actual deflection amount and tension force hydraulic information of the belt field identified in the part;
Calculating an additional tension hydraulic pressure for adjusting the tension force so that the actual deflection amount is within the allowable deflection amount based on the derived equation when the measured actual deflection amount exceeds the allowable deflection amount; And
Including; a hydraulic input unit inputting the calculated additional tension hydraulic pressure,
The step of deriving the equation is characterized in that the equation is derived through a correlation analysis of the load, tension pressure, and deflection amount at 20tonf, 40tonf, 60tonf, 80tonf, and 100tonf as a result of the experiment,
The step of deriving the equation,
(a) Zero-adjusting the Vibrating Wire Sensor for detecting the elongation of the stranded wire and the Linear Gauge (mm) for measuring the deflection of the strand after applying an initial tension of 3 tons,
(b) loading a 5tonf load, detecting the elongation of the stranded wire with a vibrating wire sensor, and measuring the deflection of the strip with a linear gauge,
(c) removing the load, detecting the elongation of the stranded wire with a vibrating wire sensor, and measuring the deflection of the strip with a linear gauge,
(d) loading tension, detecting the elongation of the stranded wire with a vibrating wire sensor, and measuring the deflection of the strip with a linear gauge,
(e) loading a load, detecting the elongation of the strand with a vibrating wire sensor, and measuring the deflection of the strip with a linear gauge,
(f) removing the load, detecting the elongation of the stranded wire with a vibrating wire sensor, and measuring the deflection of the strip with a linear gauge; and
(g) It is further characterized in that it comprises the step of repeatedly performing the steps (d) to (f) while varying the values of the tension and the load,
The step of determining information on the amount of deflection of the actual strip is
In order to detect the low sedimentation of the strip according to the tension of the strip, the vibration wire sensor is used to measure the actual deflection of the strip from the Vibrating Wire Sensor and Linear Gauge (mm) to detect the elongation of the strand installed on the strip. And a linear gauge to determine the actual deflection measurement in the state of the zero-point adjustment, characterized in that the soil barrier construction information construction control method.
delete delete The method of claim 1, wherein the earthing construction information construction device,
Receiving the tension pressure and the amount of deflection;
Inferring a virtual quadratic equation based on the derived equation by applying the received tension pressure and deflection amount; And
Applying the received amount of deflection and inverting the inferred quadratic equation to find a suitable load load (X) value.
The method of claim 1, wherein the earthing construction information construction device,
A total tension hydraulic pressure, an additional tension hydraulic pressure, and a final minimum pressure result including at least one of a loading load is displayed on a graph.
The method of claim 1,
The step of deriving the equation is to analyze the correlation between the load load, the tension force hydraulic pressure, and the amount of deflection by diagramming the load-load correlation graph and the hydraulic-initial deflection correlation graph.
delete An information grasping unit for grasping the tension force hydraulic information and the actual deflection amount information generated by the earth pressure change;
Analyzing the correlation between the load load, the tension force hydraulic pressure, and the amount of deflection while changing the load load and the tension force hydraulic value based on the detected actual deflection information of the belt length, and grasp in the information grasping unit from the correlation equation calculated according to the analysis result. An equation derivation unit for inducing an equation by reflecting the amount of deflection and the tension force hydraulic information of the actual belt field;
A tension force hydraulic pressure calculation unit that calculates an additional tension force hydraulic pressure for tension force adjustment based on a relational expression derived from the equation derivation unit when the actual deflection amount determined by the information grasping unit exceeds the allowable deflection amount; And
Includes; a hydraulic input unit for inputting the additional tension hydraulic pressure calculated by the tension force hydraulic pressure calculation unit,
The equation inducing unit is characterized in that it derives the equation through the correlation analysis of the load load, the tension pressure and the amount of deflection at 20tonf, 40tonf, 60tonf, 80tonf, and 100tonf as a result of the experiment,
Further comprising a Vibrating Wire Sensor for detecting the elongation of the stranded wire and a Linear Gauge (mm) for measuring the deflection of the strip,
The equation derivation unit,
(a) Zero-adjusting the Vibrating Wire Sensor for detecting the elongation of the stranded wire and the Linear Gauge (mm) for measuring the deflection of the strand after applying an initial tension of 3 tons,
(b) loading a 5tonf load, detecting the elongation of the stranded wire with a vibrating wire sensor, and measuring the deflection of the strip with a linear gauge,
(c) removing the load, detecting the elongation of the stranded wire with a vibrating wire sensor, and measuring the deflection of the strip with a linear gauge,
(d) loading tension, detecting the elongation of the stranded wire with a vibrating wire sensor, and measuring the deflection of the strip with a linear gauge,
(e) loading a load, detecting the elongation of the strand with a vibrating wire sensor, and measuring the deflection of the strip with a linear gauge,
(f) removing the load, detecting the elongation of the stranded wire with a vibrating wire sensor, and measuring the deflection of the strip with a linear gauge; and
(g) It is further characterized in that performing the step of repeatedly performing the steps (d) to (f) while varying the values of the tension and the load,
The information grasping unit
In order to detect the low sedimentation of the strip according to the tension of the strand, the Vibrating Wire Sensor and Linear Gauge (mm) are used to detect the elongation of the strand installed in the strip. And a ground barrier construction information construction device, further characterized in that the measurement of the actual deflection amount is grasped in a state where the linear gauge is zero-pointed.
delete delete

Images