KR20210063753A - Apparatus for measuring long-term compression subsidence of reinforced-earth abutment and method thereof - Google Patents

Abstract

The present invention relates to an apparatus for measuring long-term compression subsidence of a reinforced-earth abutment for analysis of long-term subsidence behavior and a method thereof. The apparatus comprises: a base table; a plurality of container holders provided on an upper surface of the base table, and provided at intervals set in a horizontal direction; soil filling containers detachably fixed to the container holders, respectively, and filled with a filling material sample or an original ground material sample; load applying units installed on the base table to correspond to the soil filling containers, respectively, and applying pressure to the sample filled in the soil filling containers; and displacement measurement units for measuring each displacement of the sample filled in the soil filling containers. The load applying units each include: a support frame mounted on the base table to be located next to the soil filling container; an applying bar having one end coupled to an upper portion of the support frame to rotate in a vertical direction; a weight hanging member connected to the other end of the applying rod; a plurality of unit weights loaded on the weight hanging member; and a pressing member connected to the applying bar, and applying pressure to the sample filled in the soil filling container by the load by the unit weights loaded on the weight hanging member. In accordance with the present invention, long-term subsidence of the reinforced-earth abutment with respect to reinforcing earth can be predicted, and thus the long-term subsidence and deformation of the reinforced-earth abutment can be prevented.

Description

Long-term compression settling measurement device and method for long-term settlement behavior analysis of reinforcing soil abutment {APPARATUS FOR MEASURING LONG-TERM COMPRESSION SUBSIDENCE OF REINFORCED-EARTH ABUTMENT AND METHOD THEREOF}

The present invention relates to a long-term compression settling measuring apparatus and method for long-term settlement behavior analysis of reinforced soil abutments.

A general abutment is a structure that supports both ends of the bridge in the longitudinal direction and transmits the load acting on the bridge superstructure and the earth pressure or surface load of the back fill as a basis. Since this abutment supports the vertical load and lateral earth pressure of the superstructure, the cross section is larger than that of the pier, which reduces economic efficiency and constructability. Since the front fill is constructed to prevent the abutment from sliding in the lateral direction, the space under the bridge is reduced and the span length is increased. In addition, since it is supported by a large number of pile foundations, a step difference is generated due to the difference in stiffness with the backfilling part, and the running performance is deteriorated. In addition, since an expansion joint device is required for the joint part with the upper structure, maintenance costs increase and the mechanical performance of the bridge bearing is deteriorated. Due to leakage of expansion joints, deterioration of abutment walls, bridge supports, and girders has deepened, making the durability of structures vulnerable.

In order to improve the problems of such concrete abutments, a reinforced soil abutment in which the vertical load is resisted by a direct foundation or pile foundation and the back earth pressure is resisted by a reinforced earth retaining wall is being researched and developed. Reinforced soil abutments are ductile structures that minimize the difference in stiffness with road fills to increase the drivability of bridge connections.

In the reinforcing soil alternation, as shown in FIG. 1 , the reinforcing soil body 10 in which the unit fill layer 1 and the reinforcing material 2 are stacked multiple times, and blocks are stacked in the vertical direction on the front surface of the reinforcing soil body 10 , It includes a wall 20 to which the reinforcing material is connected, and a mounting abutment on which the upper structure of the bridge is supported by being placed on the upper surface of the reinforcing soil body 10 .

With respect to the bridge to which the reinforcing earth abutment is applied, it is disclosed in Korean Patent Publication No. 10-2004-0066756 and Registered Patent No. 10-0603888.

For reinforcing soil abutments, the settlement amount and bearing capacity of the reinforcing soil body are different depending on the characteristics of the soil of the embankment layer constituting the reinforcement soil body. If the characteristics of the reinforcing soil body are not accurately grasped, and the vehicle is driven for a long time on the bridge to which the reinforcing soil abutment is applied, and subsidence occurs in the reinforcing soil abutment, the trajectory of the driving will be reduced and the bridge superstructure will be damaged. The part of the reinforcing soil body located under the supporting abutment may be deformed.

It is an object of the present invention to provide a long-term compression settling measuring device and method for long-term settlement behavior analysis of reinforcing soil abutments, which can prevent long-term settlement and deformation of reinforcing soil abutments by predicting long-term settlement of reinforcing soil bodies of reinforcing soil abutments .

Another object of the present invention is to provide a long-term compression settling measuring device and method for long-term settlement behavior analysis of a reinforcing soil abutment, which simultaneously measures the long-term settling characteristics of various filling materials of a reinforcing soil body.

In order to achieve the object of the present invention, the base table; a plurality of container holders provided on the upper surface of the base table at intervals set in a horizontal direction; Soil filling containers which are respectively detachably fixed to the container holders and filled with a fill material sample or a base material sample therein; load-loading units installed on the base table to correspond one-to-one to the soil-filled containers, each applying pressure to the sample filled in the soil-filled containers; Displacement measurement units for measuring each displacement amount of the sample filled in each of the soil-filled containers; includes, the load-bearing unit is a support frame mounted on the base table to be located next to the soil-filled container; a loading bar having one end rotatably coupled to an upper portion of the support frame in an up-down direction; a weight hanging member connected to the other end of the loading rod; a plurality of unit weights loaded on the weight hanging member; Long-term compression settling for long-term settlement behavior analysis of reinforcing soil abutments comprising; a pressing member connected to the loading bar and applying pressure to the sample filled in the soil filling container by the load by the unit weight loaded on the weight hanging member A measuring device is provided.

The container holders are preferably arranged on a straight line.

The container holder includes a base plate having a drain hole in the middle, a plurality of supports provided on a lower surface of the base plate and fixed to the base table, and a plurality of protruding portions from the upper edge of the base plate, so that the soil filling container is detachable It is preferable to include a detachable unit that is possibly coupled.

The soil filling container includes a cylindrical container part, and fixing parts that extend from the outer peripheral surface of the container part and are detachably fixed to the container holder, and a plurality of microholes are provided at the inner lower end of the soil filling container. It is preferable that a porous plate is provided.

The loading rod includes a straight rod having a set length, a first connection portion provided at one end of the rod portion and rotatably connected to the support frame, and a weight hanging member provided at the other end of the rod portion. A second connection part to which is connected, and a third connection part provided on the rod part adjacent to the first connection part and connected to the pressing member, wherein the third connection part is formed in a long hole shape having a different width and length desirable.

The pressing member preferably includes a pressing plate for pressing the upper surface of the sample filled in the soil filling container, a pressing shaft connected to the upper surface of the pressing plate, and a connecting member for movably connecting the pressing shaft and the loading rod. Do.

A balance weight may be provided at one end of the loading rod.

The displacement measuring unit includes a vertical axis coupled to the base table in a vertical direction so as to be located next to the soil filling container, a horizontal axis coupled to the vertical axis to be positionally movable, a displacement measuring device mounted on the horizontal axis, and the pressing member It is preferable to include a measuring stand coupled to the displacement measuring device to form a measuring surface of the displacement measuring device.

In addition, collecting the filling material constituting the reinforcing soil body; filling the soil filling container with the filling material; applying a first load to the upper surface of the embankment material filled in the soil filling container in a vertical direction and measuring the displacement amount of the embankment material; A load increase measurement step of loading a load greater than the first load, which is a previous load, on the filling material of the soil filling container at a time set based on the displacement amount of the filling material of the soil filling container, and measuring the displacement amount of the filling material; There is provided a long-term compression settling measurement method for long-term settlement behavior analysis of a reinforcing soil abutment comprising; repeating the load increase measuring step a set number of times.

In addition, collecting the reinforcing soil material constituting the reinforcing soil body and the base ground material in which the reinforcing soil body is filled into a plurality of types, respectively; filling each of the plurality of types of filling material samples and raw ground material samples into a plurality of soil filling containers; applying a first load in a vertical direction to the upper surface of the sample filled in each of the plurality of soil filling containers, respectively, and measuring the displacement amount of the sample in each of the soil filling containers; a load increase measurement step of loading a load greater than the first load, which is a previous load, on each sample of the soil-filled container at a time set based on the displacement amount of the sample of the soil-filled container, and measuring the amount of displacement of the sample; A long-term compression settlement measurement method for long-term settlement behavior analysis of reinforcing soil abutments is provided, including a step of repeating the load increase measurement step for each of the soil-filled containers a set number of times.

The vertical load applied to the upper surface of the sample of the soil filling container is applied in four steps, and the load applied in the four steps is preferably 150, 300, 450, and 600 KPa, respectively.

It is preferable that the plurality of soil filling containers are 4-6.

The present invention fills a plurality of soil-filled containers with different samples (fill material, raw ground material), respectively, and applies a load (pressure) that is increased in multiple steps so that a vertical stress is applied to each sample of the soil-filled containers, each After measuring the amount of displacement of the sample under the load of the step for a certain period of time and then applying the increased load to the sample and measuring the amount of displacement of the sample for a certain period of time, the amount of displacement of the sample is measured while repeating, so that the long-term settlement behavior of each sample can be accurately measured. This makes it possible to design and construct the reinforcing soil abutment by considering the long-term settlement and deformation of the reinforcing soil body of the reinforcing soil abutment when designing and constructing the reinforcing soil abutment.

In addition, according to the present invention, a plurality of soil filling containers are mounted on the base table and a load loading unit is provided next to each of the soil filling containers, so that it is possible to measure the settling behavior of various types of samples at the same time for a long period of time. It shortens the period of understanding long-term settlement behavior.

1 is a side cross-sectional view showing an example of a reinforcing soil abutment;
2 is a flowchart showing a first embodiment of a long-term compression settlement measurement method for long-term settlement behavior analysis of a reinforcing soil abutment according to the present invention;
3 is a flowchart showing a second embodiment of a long-term compression settlement measurement method for long-term settlement behavior analysis of a reinforcing soil abutment according to the present invention;
4 is a front view showing an embodiment of a long-term compression settling measuring device for long-term settlement behavior analysis of a reinforcing soil abutment according to the present invention;
5 is a plan view showing an embodiment of a long-term compression settling measuring device for long-term settlement behavior analysis of a reinforcing soil abutment according to the present invention;
Figure 6 is a right side view showing an embodiment of the long-term compression settling measuring apparatus for long-term settlement behavior analysis of the reinforcing soil abutment according to the present invention.

Hereinafter, an embodiment of a long-term compression settling measuring apparatus and method for long-term settlement behavior analysis of a reinforced soil abutment according to the present invention will be described with reference to the accompanying drawings.

2 is a flowchart illustrating a first embodiment of a long-term compression settlement measurement method for long-term settlement behavior analysis of a reinforcing soil abutment according to the present invention.

As shown in Figure 2, the first embodiment of the long-term compression settling measurement method for the long-term settlement behavior analysis of the reinforcing soil abutment according to the present invention, first, the step (S1) of collecting the fill material constituting the reinforcing soil body proceeds The filling material is collected from the area where the bridge will be installed, but may be collected from the starting point and the ending point where the bridge will be installed, or it may be transported from the outside and used to fill the reinforcing soil at the starting point and the ending point.

After collecting the filling material, the step (S2) of filling the soil filling container with the filling material is performed. The soil filling container is filled with the filling material and compacted. The degree of compaction is performed with a compaction rammer in a state where the relative density is 90 ~ 95%, and the optimal number of compactions is calculated, and then the filling material is placed in the soil filling container. Fill it up and make a promise with a compaction rammer.

After the soil filling container is filled with the filling material and compacted, a first load is applied to the upper surface of the filling material filled in the soil filling container in the vertical direction, and a step (S3) of measuring the displacement of the filling material is performed. It is preferable to measure the displacement of the fill material using a Linear Variable Displacement Transducer (LVDT). The displacement amount of the filling material is measured until the displacement amount of the filling material stops or for a set time.

After loading the embankment material as the first load and measuring the displacement, a load greater than the first load, which is the previous load, is applied to the embankment material of the earthfill container at the time set based on the displacement amount of the embankment material of the earthfill container, and the amount of displacement of the embankment material A load increase measurement step (S4) of measuring the . It is preferable to apply a load greater than the first load after the first load is applied to the embankment material and the amount of displacement is measured for a certain period of time and the change of the amount of displacement is stopped at the time of applying a load greater than the first load to the embankment material. .

Then, a step (S5) of repeating the load increase measurement step a set number of times is performed. It is desirable to repeat the load increase measurement step two more times. Therefore, the vertical load applied to the upper surface of the embankment material is applied in four steps. The load applied to the upper surface of the fill material in four steps is preferably 150, 300, 450, and 600 KPa.

The long-term compression settling behavior of the embankment material can be analyzed with this measurement method.

3 is a flowchart illustrating a second embodiment of a long-term compression settlement measurement method for long-term settlement behavior analysis of a reinforcing soil abutment according to the present invention.

As shown in Figure 3, the second embodiment of the long-term compression settling measurement method for the long-term settlement behavior analysis of the reinforcing soil abutment according to the present invention is first, the reinforcing soil material constituting the reinforcing soil and the base material in which the reinforcing soil is filled. A step (S10) of collecting each of a plurality of types is performed.

After collecting a plurality of fill materials and a plurality of base materials, respectively, a step (S11) of filling the plurality of kinds of fill material samples and base ground material samples into a plurality of soil filling containers, respectively, is performed. Each of the soil-filled containers is filled with a sample and compacted, and the optimal number of compactions is calculated by performing a repeated compaction experiment with a compaction rammer in a state where the degree of compaction corresponds to a relative density of 90 to 95%, and then the sample is placed in the soil-filled container. Fill it up and make a promise with a compaction rammer. It is preferable to have 4 to 6 soil filling containers.

After filling and compacting different samples in the plurality of soil-filled containers, a first load is respectively applied to the upper surface of the samples filled in the plurality of soil-filled containers in the vertical direction, and the displacement amount of the sample of each soil-filled container is measured Step S12 proceeds. It is preferable that the first load is applied to each sample of the soil-filled containers almost simultaneously, and the displacement of the sample is preferably measured using a Linear Variable Displacement Transducer (LVDT). The amount of displacement of the sample is measured until the amount of displacement of the sample is stopped or for a set time.

After loading each of the samples with the first load and measuring the amount of displacement, a load greater than the first load, which is the previous load, is applied to each sample of the soil-filled container at the time set based on the sample displacement of the soil-filled container, and the displacement of the sample is measured. A load increase measurement step (S13) is performed. When a load greater than the first load is applied to the sample, the first load is applied to the sample, the amount of displacement is measured for a certain period of time, and the load greater than the first load is applied after the change in the amount of displacement is stopped.

Then, a step (S14) of repeating the load increase measurement step for each of the soil-filled containers a set number of times is performed. It is desirable to repeat the load increase measurement step two more times. Therefore, the vertical load applied to the upper surface of the sample is applied in four steps. The load applied to the upper surface of the sample in four steps is preferably 150, 300, 450, and 600 KPa.

With such a measurement method, the long-term compression settling behavior of a plurality of fill materials and a plurality of raw ground materials can be analyzed.

4 is a front view showing an embodiment of a long-term compression settling measuring apparatus for long-term settlement behavior analysis of a reinforcing soil abutment according to the present invention. 5 is a plan view showing an embodiment of a long-term compression settling measuring apparatus for long-term settlement behavior analysis of a reinforcing soil abutment according to the present invention. 6 is a right side view showing an embodiment of a long-term compression settling measuring apparatus for long-term settlement behavior analysis of a reinforcing soil abutment according to the present invention.

As shown in Figures 4, 5, 6, an embodiment of the long-term compression settling measurement apparatus for long-term settlement behavior analysis of the reinforcing soil abutment according to the present invention, the base table 100, the container holder 200, the soil It includes the filling containers 300 , the load loading unit 400 , and the displacement measurement units 500 .

The base table 100 includes a table 110 in the shape of a square plate, and four legs 120 connected to each corner of the bottom surface of the table 110 in a vertical direction to support the table 110 .

A plurality of container holder 200 are provided on the upper surface of the base table 100, and are provided at intervals set in the horizontal direction. The container holders 200 are each detachably mounted on the upper surface of the table 110 of the base table 100, the container holders 200 are preferably arranged on a straight line. As an example, the container holder 200 may be six. As an example of the container holder 200 , the container holder 200 includes a base plate 210 having a drain hole in the middle, and a plurality of supports provided on the lower surface of the base plate 210 and fixed to the base table 100 . The earth 220 and a plurality of protruding from the upper surface edge of the base plate 210 includes a detachable unit 230 to which the soil filling container 300 is detachably coupled. The base plate 210 is preferably a square plate. It is desirable that the supporters 220 are four, and the four supporters 220 are connected to the four corners of the lower surface of the base plate 210 . The supporters 220 are preferably formed in a round bar shape having a uniform length, and a screw hole in the center of the supporters 220 is formed through. The detachable unit 230 includes a bolt coupled to the upper surface of the base plate 210 in a vertical direction, and a butterfly nut fastened to the bolt. It is preferable that there are two detachable units 230 and the two detachable units 230 are located on both sides with respect to the drain hole, and the two detachable units 230 and the drain hole are preferably located on the same straight line. . The container holder 200 is preferably fixed by fastening a plurality of fastening bolts 111 through-fastened to the table 110 of the base table 100 to the supports 220 of the container holder 200, respectively.

The soil filling containers 300 are respectively detachably fixed to the container holder 200, respectively, the filling material or the base material is filled therein. Hereinafter, the fill material and the base material are referred to as samples. The soil filling containers 300 are detachably fixed one-to-one to the container holder 200 . It is preferable that the filling materials filled in the soil filling containers 300 are different from each other, and the base material is also different from each other. As an example of the soil filling container 300, the soil filling container 300 has a cylindrical container part 310 and the container part 310 extending and protruding from the outer circumferential surface of the container part 310 to be detachably fixed to the container holder 200. Includes fixing parts 320 . The fixing parts 320 are connected to the outer peripheral surface of the container part 310 with a phase difference of 180 degrees in the circumferential direction. As an example of the fixing part 320 , the fixing part 320 is preferably formed in a plate shape with an insertion groove 321 opened on one side. It is preferable that a porous plate provided with a plurality of micro-holes is inserted at the bottom of the inner bottom of the soil filling container 300 . In the state in which the soil filling container 300 is positioned so that the lower end surface of the container part 310 is in contact with the upper surface of the base plate 210 of the container holder 200, the fixing parts 320 are the detachable unit of the container holder 200 ( 230) are respectively mounted and fixed to the container holder 200. At this time, the drain hole of the base plate 210 is located in the middle of the container part 310 of the soil filling container 300 .

The load units 400 are installed on the base table 100 so as to correspond one-to-one to the soil filling containers 300 , and apply pressure to the samples filled in the soil filling containers 300 , respectively. As an example of the load loading unit 400 , the load loading unit 400 includes a support frame 410 mounted on the base table 100 so as to be located next to the soil filling container 300 , and the support frame 410 . A loading rod 420 having one end rotatably coupled to the upper portion in the vertical direction, a weight hanging member 430 connected to the other end of the loading rod 420, and the weight hanging member 430 are loaded Pressure is applied to the sample filled in the soil filling container 300 by the load by the plurality of unit weights 440 and the unit weights 440 that are connected to the loading rod 420 and loaded on the weight hanging member 430 . It includes a pressing member 450 to apply. The support frame 410 has a set height. A support connecting portion 411 to which the loading rod 420 is connected is provided on the upper portion of the support frame 410 . As an example of the support connection part 411, the connection support part 411 is provided with an insertion groove having an upper side opened so that the loading rod 420 is inserted, and includes a connection pin passing through the insertion groove. The loading rod 420 includes a straight rod portion 421 having a set length, and a first connection portion 422 provided at one end of the rod portion 421 and rotatably connected to the support frame 410 and , is provided on the other end of the rod portion 421, the second connection portion 423 to which the weight hanging member 430 is connected, and the first connection portion 422 and adjacent to the rod portion 421 provided in the pressing member ( and a third connection part 424 connected to the 450 . The first connection part 422 includes a circular through hole through which the connection pin of the support frame 410 is inserted. The second connection part 423 includes a circular pin shape extending in the longitudinal direction of the rod part 421 . The third connecting portion 424 is preferably formed in the shape of a long hole having a different width and length. The loading rod 420 is rotatably connected to the first connecting portion 422 to the supporting connecting portion of the support frame 410 . A balance weight 460 may be provided at one end of the loading bar 420 . The balance weight 460 is provided at the end of the first connector side of the loading rod 420 , it is provided in the longitudinal direction of the loading rod 420 . The pressing member 450 includes a pressing plate 451 for pressing the upper surface of the sample filled in the soil filling container 300, a pressing shaft 452 connected to the upper surface of the pressing plate 451, and the pressing shaft 452 and It includes a connection member 453 for movably connecting the loading rod 420 . The connecting member 453 is preferably formed in a round bar shape so as to penetrate the third connecting portion 424 of the loading rod 420 .

The displacement measurement units 500 measure each displacement amount of the sample filled in the soil filling containers 300 . As an example of the displacement measurement unit 500, the displacement measurement unit 500 includes a vertical axis 510 coupled in a vertical direction to the base table 100 so as to be positioned next to the soil filling container 300, and the vertical axis 510. A horizontal shaft 520 coupled to be movable in the position, a displacement measuring device 530 mounted on the horizontal shaft 520, and a measuring table coupled to the pressing member 450 to form a measurement surface of the displacement measuring device 530 ( 540). The measuring table 540 is preferably connected to the upper surface of the pressing plate 451 of the pressing member 450 . When the pressure plate 451 moves downward while the pressure plate 451 presses the sample filled in the soil filling container 300 in a state in which the displacement gauge 530 is fixed to the horizontal axis 520, the pressure plate 451 moves downward according to the movement of the pressure plate 451. When the measuring table 540 moves downward, the displacement measuring device 530 measures the moving distance of the measuring table 540 .

Hereinafter, the operation and effect of a long-term compression settling measuring apparatus and method for long-term settlement behavior analysis of a reinforced soil abutment according to the present invention will be described.

First, a plurality of soil filling containers 300 are filled with different types of filling materials and different types of base materials, respectively, and compacted. Hereinafter, a case in which two types of filling materials and two types of base materials are filled in each of the four soil filling containers 300 will be described. The two filling materials are called samples 1 and 2, the two base materials are called samples 3 and 4, and the soil filling container 300 filled with samples 1, 2, 3, 4 is called samples 1, 2, 3, 4 It is called a soil filling container (300). The soil filling containers 300 filled with the samples are respectively fixed to the container holder 200 provided on the base table. On the other hand, after separating the container holder 200 from the base table 100 and fixing the soil container 300 to the container holder 200, the sample is filled in the soil filling container 300 and compacted, then the container holder 200 ) may be fixed to the base table 100 .

In a state in which the soil filling containers 300 each filled with samples are mounted on the container holder 200 of the base table 100, respectively, the load loading unit 400 positioned next to each of the soil filling containers 300 is configured. The pressing plate 451 of the pressing member 450 is brought into contact with the upper surface of the sample filled in the soil filling container 300 , and one unit weight 440 is placed on the weight hanging member 430 . At this time, the unit weight 440 is placed on each of the weight hanging members 430 of the load loading unit 400 positioned next to each of the four soil filling containers 300 at approximately the same time. As the unit weight 440 is placed on the weight hanging member 430, the loading rod 420 by the load of the unit weight 440 moves the second connection part 423 with the first connection part 422 as an axis. While moving downward, the pressing plate 451 of the pressing member 450 connected to the third connection part 424 presses the sample filled in the soil filling container 300 . As the pressing plate 451 of the pressing member 450 presses the sample, the pressing member 450 moves downward, and the displacement measuring device 530 of the displacement measuring unit 500 measures the movement of the pressing member 450. The amount of displacement of the sample according to the load is measured. A single unit weight 440 is placed on the weight hanging member 430 and the amount of displacement of the sample filled in each of the four soil filling containers 300 is measured while maintaining it for a set time in a state in which a load is applied to the sample. It is preferable to set the set time from 15 days to 20 days. On the other hand, the set time may be a point in time when there is no change in the sample. After a set time elapses by placing one unit weight on the weight hanging member of the load loading unit 400, put another unit weight 440 on the unit weight 440 placed on the weight hanging member 430 and set Measure the amount of displacement of the sample while maintaining time. In this way, the amount of displacement of the sample is measured while increasing the load on the sample. It is preferable to increase the load acting on the sample in four steps. That is, the displacement amount of the sample is measured while the four unit weights 440 are placed on the weight hanging member 430 one by one according to a set time. It is preferable that the loads applied to the sample over four times are 150, 300, 450, and 600 KPa.

As such, the present invention fills different samples in each of the plurality of soil filling containers 300, respectively, and applies a load (pressure) that is increased in multiple steps so that a vertical stress is applied to each sample of the soil filling container 300, After measuring the amount of displacement of the sample at each step of the load for a certain period of time, then the increased load is then applied to the sample, and the amount of displacement of the sample is measured while repeating the measurement of the amount of displacement for a certain period of time. This makes it possible to design and construct the reinforcing soil abutment by considering the long-term settlement and deformation of the reinforcing soil body of the reinforcing soil abutment when designing and constructing the reinforcing soil abutment.

In addition, in the present invention, a plurality of soil filling containers 300 are mounted on the base table and a load loading unit 400 is provided next to each of the soil filling containers 300 to measure the sedimentation behavior of various types of samples simultaneously for a long period of time. This will shorten the period of understanding the long-term settlement behavior of various types of samples.

100; base table 200; container holder
300; earth fill container 400; load-bearing unit
500; Displacement measuring unit

Claims (12)

base table;
a plurality of container holders provided on the upper surface of the base table at intervals set in a horizontal direction;
Soil filling containers which are respectively detachably fixed to the container holders and filled with a fill material sample or a base material sample therein;
load-loading units installed on the base table to correspond one-to-one to the soil-filled containers, each applying pressure to the sample filled in the soil-filled containers;
Displacement amount measuring units for measuring each displacement amount of the sample respectively filled in the soil-filled containers; includes,
The load-bearing unit is a support frame mounted on the base table so as to be located next to the soil filling container;
a loading bar having one end rotatably coupled to an upper portion of the support frame in an up-down direction;
a weight hanging member connected to the other end of the loading rod;
a plurality of unit weights loaded on the weight hanging member;
Long-term compression settling for long-term settlement behavior analysis of reinforcing soil abutments comprising; a pressing member connected to the loading bar and applying pressure to the sample filled in the soil filling container by the load by the unit weight loaded on the weight hanging member measuring device. The apparatus for measuring long-term compression settlement for long-term settlement behavior analysis of reinforcing soil abutments according to claim 1, wherein the container holders are arranged on a straight line. According to claim 1, wherein the container holder is a base plate provided with a drain hole in the center, a plurality of supports provided on the lower surface of the base plate fixed to the base table, a plurality of protruding from the upper edge of the base plate Long-term compression settling measuring device for long-term settlement behavior analysis of reinforcing soil abutments comprising a detachable unit to which the soil filling container is detachably coupled. According to claim 1, wherein the soil-filled container comprises a cylindrical container portion, and a plurality of fixing portions protruding from the outer peripheral surface of the container portion to be detachably fixed to the container holder, the inner bottom of the soil-filled container Long-term compression settling measuring device for long-term settling behavior analysis of reinforcing soil abutments, characterized in that a porous plate with fine holes is provided. According to claim 1, wherein the loading rod is a straight bar portion having a set length, a first connection portion provided at one end of the rod portion rotatably connected to the support frame, and the other end of the rod portion. It is provided and includes a second connection portion to which the weight hanging member is connected, and a third connection portion provided on the rod portion adjacent to the first connection portion and connected to the pressing member, wherein the third connection portion has a different width and length. Long-term compression settling measuring device for long-term settlement behavior analysis of reinforcing soil abutments, characterized in that they are formed in a long hole shape. According to claim 1, wherein the pressing member is a pressure plate for pressing the upper surface of the sample filled in the soil filling container, a pressure shaft connected to the upper surface of the pressure plate, and a connection for movably connecting the pressure shaft and the loading bar Long-term compression settling measuring device for long-term settlement behavior analysis of reinforced soil abutments including members. The apparatus for measuring long-term compression settlement for long-term settlement behavior analysis of reinforcing soil abutments according to claim 6, wherein a balance weight is provided at one end of the loading rod. The displacement of claim 1, wherein the displacement measuring unit includes a vertical axis coupled to the base table in a vertical direction to be positioned next to the soil filling container, a horizontal axis coupled to the vertical axis to be movable, and a displacement mounted on the horizontal axis. A long-term compression settling measuring device for long-term settlement behavior analysis of reinforcing soil abutments, comprising: a measuring device; and a measuring table coupled to the pressing member to form a measuring surface of the displacement measuring device. Collecting the filling material constituting the reinforcing soil body;
filling the soil filling container with the filling material;
applying a first load to the upper surface of the embankment material filled in the soil filling container in a vertical direction and measuring the displacement amount of the embankment material;
A load increase measurement step of loading a load greater than the first load, which is a previous load, on the fill material of the soil filling container at a time set based on the displacement amount of the filling material of the soil filling container, and measuring the displacement amount of the filling material;
Long-term compression settlement measurement method for long-term settlement behavior analysis of reinforcing soil abutments comprising; repeating the load increase measurement step a set number of times. Collecting the reinforcing soil material constituting the reinforcing soil and the original ground material in which the reinforcing soil is filled into a plurality of types, respectively;
filling each of the plurality of types of filling material samples and raw ground material samples into a plurality of soil filling containers;
applying a first load in a vertical direction to the upper surface of the sample filled in each of the plurality of soil filling containers, respectively, and measuring the displacement amount of the sample in each of the soil filling containers;
a load increase measuring step of loading a load greater than the first load, which is a previous load, on each sample of the soil-filled container at a time set based on the displacement amount of the sample of the soil-filled container, and measuring the amount of displacement of the sample;
Long-term compression settlement measurement method for long-term settlement behavior analysis of reinforcing soil abutment comprising; repeating the load increase measurement step for each of the soil-filled containers a set number of times. 11. The method of claim 9 or 10, wherein the vertical load applied to the upper surface of the sample of the soil-filled container is applied in four steps, and the loads applied in the four steps are 150, 300, 450, and 600 KPa, respectively. Long-term compression settlement measurement method for long-term settlement behavior analysis of reinforced soil abutments using 11. The method of claim 10, wherein the plurality of soil-filled containers are 5 to 6, long-term compression settlement measurement method for long-term settlement behavior analysis of reinforcing soil abutments.

Images