KR102150358B1 - Method for implementing measurement structure of soft ground press-fit layered setter - Google Patents

Abstract

The present invention relates to a method for implementing a measurement structure of a soft ground press-fitting type layer settling system. More specifically, according to the method for implementing the measurement structure of the soft ground press-fit type layer settling system of the present invention, since subsidence of a soft ground shows a different behavior for each layer, subsidence of each layer generated on the soft ground is identified by measuring the subsidence of each layer. The method for implementing the measurement structure of the soft ground press-fitting type layer settling system is improved so that rational construction can be achieved for a construction work embedding on the soft ground by changing a design and construction. The method for implementing the measurement structure of the soft ground press-fitting type layer settling system includes: a first step of drilling (equal to or more than 100mm of boring inner diameter) 1m before an installation plan depth; a second step of rotating a screw formed at a lower end of a sinking rod and fixing the screw to the ground; a third step of maintaining verticality of a measuring rod; and a fourth step of measuring level of settlement.

Description

Method for implementing measurement structure of soft ground press-fit layered setter}

The present invention relates to a method of implementing the measurement structure of a soft ground press-fit layer-by-floor settlement system, and more particularly, because the settlement of soft ground shows a different behavior for each layer, it occurs by floor by measuring the settlement of each layer on the soft ground. It relates to a method of implementing an improved soft-ground press-fitting layer-by-floor settling system measurement structure so that reasonable construction can be achieved for construction works embedding on the soft ground by grasping the subsidence of the soft ground and changing the design and construction.

In general, when constructing a site for expressways, airports, ports, or industrial complexes and new towns on the soft ground, for civil engineering-related work, soil is filled on the soft ground and then the construction is carried out on the ground.

In this case, a settling phenomenon occurs in the soft ground that is the basis, and the degree of settlement of the soft ground is measured through a measuring device.

At this time, if it is difficult to predict the amount of compression occurring in each layer due to the complex structure of the stratum, a settlement system is installed at a point desired by the constructor through the stratum settlement system and the settlement amount and speed of the stratum are measured to measure the elasticity and consolidation settlement of each stratum. To be able to confirm.

The field of application of this settlement measurement is not only the soft ground, but also the displacement measurement due to subsidence or elevation of the foundation ground and the embankment ground, displacement measurement of retaining walls and bridges, and displacement measurement of embankments and sand dams.

In the conventional general floor settling system, after drilling an excavation hole into the ground, a magnetic device is positioned for each stratum in the excavation hole, and the amount of settlement of the magnetic device is measured to check the amount of settlement.

For example, as shown in the example of Figure 1, the conventional layer-by-floor settling system 10 is a plurality of insertion tubes 20, the insertion tube 20 and the insertion tube for insertion / burying in a perforation (H) artificially formed in the soft ground (20) A connector 50 for connecting between, but inserted/connected to the outer circumferential surface of the insertion tube 20, and a plurality of settlement elements 30 and the insertion tube 20 respectively positioned in the set stratum to be measured It is inserted through the electrical cable 41 to the settlement element 30 is configured to include a probe element 40 for detecting the displacement amount.

However, such a conventional floor settling system is assembled by inserting/connecting the settlement device to the outer circumferential surface of the insertion tube after perforating the corresponding ground to check the insertion position of the settlement element. In this case, the settlement device In order to move the pipe to the desired position within the insertion pipe, it is necessary to slide from the end of the insertion pipe to the corresponding position. Accordingly, it takes a long time to assemble the floor-by-floor settling system after drilling, so that the floating object sinks into the hole to the desired depth. There is a problem in not being able to install a floor settling system.

In addition, since the connector for connecting the insertion tube and the insertion tube protrudes to the outside of the insertion tube when assembling the floor settlement system, if the installation location of the settlement element and the connection section of the connector overlap, the settlement element can be installed at that location. There is a problem in that accurate settlement cannot be measured because there is no.

In addition, if the insertion tube is deformed due to subsidence, it may be lost or the measured value may be distorted.

Republic of Korea Patent Registration No. 10-1410907 (2014.06.17.), "Settlement measurement system using anchor and settlement measurement method using the same" Republic of Korea Patent Publication No. 10-2013-0000681 (2013.01.03.), "underground subsidence measurement device and method for each floor"

The present invention was created to solve the problems in the prior art as described above, and because the subsidence of the soft ground exhibits different behaviors for each stratum, it occurs for each layer by measuring the subsidence of each layer that occurs on the soft ground. Its main purpose is to provide a method of implementing an improved soft ground press-fitting type floor settling system measurement structure so that rational construction for construction works embedding on the soft ground can be made by grasping the subsidence of the soft ground and changing the design and construction. have.

The present invention is a means for achieving the above object, as a method for implementing a measurement structure of a soft ground press-fitting layered settling system, including a settling rod 100 pressed into the soft ground, and a screw ( 110) is formed in a certain length, and when the settling bar 100 is typed on a soft ground, a settling bar protection tube 120 that is fitted with a larger diameter than the settling bar 100 to protect the settling bar 100 is further provided. And, the inner diameter of the settling rod protection pipe 120 is provided with a spacer 130 at an interval of 2m in the longitudinal direction so that the settling rod 100 is inserted when the settling rod protection pipe 120 is installed, so that the vertical of the settling rod 100 In the soft ground press-fitting type layer-by-floor settling meter measurement structure implementation method configured to measure the settling amount by measuring the change in the upper level of the settling rod 100 due to the screw 110 configured to maintain the degree and settled together when the soft ground subsides;
The first step of drilling (boring inner diameter 100mm or more) before the installation plan depth 1m in order to safely and accurately measure the degree of settlement;
A second step of rotating the screw formed at the lower end of the sinking rod until the installation plan depth after the first step and fixing it to the ground;
After the second step, a third step of installing the settling bar protection tube to a depth of perforation, and inserting spacers provided at 2m intervals in the settling bar protection tube to the measurement bar to maintain the verticality of the measurement bar;
When the third step is completed, the fourth step of measuring the sinking level by writing the total connection length of the measuring rod on the top of the installed measuring rod is performed, so that it is possible to install at an accurate installation depth, and the measuring instrument is lost due to the settlement. It provides a method of implementing a measurement structure of a soft ground press-fit layer-by-floor settlement system, characterized in that the inaccuracy of measurement and measurement is greatly improved.

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According to the present invention, since the subsidence of soft ground exhibits different behaviors for each layer, by measuring the subsidence of each layer occurring on the soft ground, the subsidence of the soft ground generated by each layer is identified, and the design and construction are changed to determine the soft ground. Improved effects can be obtained so that rational construction can be made for the construction work to be filled on the top.

1 is a view showing an enlarged view of a conventional floor settling system installed on a soft ground and a settlement element applied thereto.
Figure 2 is an exemplary cross-sectional view showing a method of implementing the measurement structure of the soft ground press-fitting layered settling system according to the present invention.
FIG. 3 is a photograph of a site showing a layer-by-floor settling material used in FIG. 2.
FIG. 4 is a photograph of a site showing an installation example of a floor settling system used in FIG. 2.

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

The present invention is a structure to measure the subsidence of each layer at a certain point of the soft ground. After drilling to the depth to determine the amount of subsidence by layer, a settling bar having a screw shape at the lower end is penetrated into the soft layer, and then the settling bar is connected to the ground surface, and then It has a measurement structure to measure the settlement of the lower layer of the intrusion point by performing leveling.

The method of implementing the measurement structure of the soft ground press-fitting layered settling system according to the present invention uses a screw-type settling rod 100 instead of the existing settling element as illustrated in FIG. 2.

That is, the settling rod 100 has a structure in which a screw 110 of a predetermined length is formed at the lower end.

In addition, when the settling bar 100 is typed on a soft ground, a settling bar protection tube 120 is further provided to protect it.

In particular, spacers 130 are installed at 2m intervals on the inner diameter of the sinking rod protection tube 120 so that the sinking rod 100 can maintain a completely vertical degree.

In this case, the spacer 130 is configured to pass through the settling rod 100, and the through hole is configured to form a concentric circle with the center of the settling rod protection tube 120.

Such a layered settling system measurement structure is usually used when a clay layer, which is the main constituent layer of a soft ground, is placed on a solid layer.

In the case of such a structure, ground settlement usually occurs in the clay layer, and a crushed stone mat is usually laid on it, and a crushed stone mat is laid on the crushed stone mat to form an embankment layer.

In the present invention, the devices used for the measurement structure of the floor settling system of the present invention as shown in FIG. 3 are constructed as shown in FIG.

At this time, the specifications constituting the measurement structure of the floor settlement system are as follows.

(A) Condition: 1 installation per hole (bore 100mm or more)

(B) Settlement rod:

① Material and standard: Galvanized steel pipe for water supply, outer diameter 34mm, thickness 3.25mm

② Length: 1m per book

(C) Screw

① Diameter: Φ3″ steel

② Install a screw (1.0m) at the bottom of the settling bar (1.0m)

③ Corrosion prevention coating

(D) Protection pipe: Corrugated rigid PE pipe

(E) Spacer: installed every 2m

(F) Corrosion prevention coating

(G) Consumables and all others

The method to implement the floor-by-floor settlement structure under these specifications is as follows.

First, the first step of drilling (boring inner diameter 100mm or more) is performed 1m before the installation plan depth.

At this time, the reason for drilling 1m before the installation plan depth is to measure the degree of settlement safely and precisely.

Subsequently, a second step of fixing the screw to the ground by turning the screw formed at the lower end of the sinking rod to the installation plan depth is performed.

That is, the remaining 1m is fixed to the ground by screwing and fixing it.

Then, a third step of installing the settling bar protection tube to the depth of perforation, and maintaining the verticality of the measurement bar by inserting spacers provided at 2m intervals in the settling bar protection tube to the measurement bar is performed.

In this way, when the third step is completed, the fourth step of measuring the settling level by writing the total connection length of the measuring rod on the top of the installed measuring rod is performed.

This is possible because the screw part is integrated with the installation ground, so it behaves like a ground subsidence, so by measuring the level change of the top of the upper sinking bar, it is possible to check the amount of settlement very simply and accurately.

As described above, the press-fit screw type according to the present invention can be installed at an accurate installation depth, and it is a floor settling system that greatly improves the loss of the measuring instrument and the measurement inaccuracy according to the settlement. It is expected to be of great effect if it is installed on the marine clay ground in the southern coastal area.

100: sinking rod 110: screw
120; Settlement rod protection tube 130: spacer

Claims (1)

As a method of implementing the measurement structure of the soft ground press-fitting type layer-by-floor settlement system, it includes a settling rod 100 that is pressed into the soft ground, and a screw 110 is formed at a predetermined length at the lower end of the settlement rod 100, and the settlement rod 100 ) Is further provided with a settling bar protection tube 120 that is fitted with a larger diameter than the settling bar 100 to protect the settling bar 100 when it is typed on the soft ground, and the inner diameter of the settling bar protection tube 120 has a length Spacers 130 are installed at 2m intervals in the direction so that the sinking rod 100 is inserted when the sinking rod protection pipe 120 is installed to maintain the verticality of the sinking rod 100 so that it sinks together with the soft ground. In the method of implementing the measurement structure of the soft ground press-fit layer settling system configured to measure the amount of settlement by measuring the change in the upper level of the settling rod 100 due to the screw 110;
The first step of drilling (boring inner diameter 100mm or more) before the installation plan depth 1m in order to safely and accurately measure the degree of settlement;
A second step of rotating the screw formed at the lower end of the sinking rod until the installation plan depth after the first step and fixing it to the ground;
A third step of installing the settling rod protection tube to a depth of perforation after the second step, and inserting spacers provided at 2m intervals in the settling rod protection tube to the measuring rod to maintain the verticality of the measuring rod;
When the third step is completed, the fourth step of measuring the sinking level by writing the total connection length of the measuring rod on the top of the installed measuring rod is performed, so that it is possible to install at an accurate installation depth, A method of implementing the measurement structure of a press-fit layered settling system for soft ground, characterized in that the inaccuracy of measurement and measurement is greatly improved.

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