KR20180083471A - Test apparatus for predicting performance of soft ground Tunnel Boring Machine - Google Patents

Abstract

The present invention relates to an excavation performance testing apparatus and method for predicting performance of a soft-ground tunnel boring machine (TBM). The apparatus includes: a housing; a compacted sample box provided on a lower end of the housing, with an upper portion being opened and compacted soil being filled therein; a soil chamber provided on the compacted sample box in the housing, in which the soil comes in the soil chamber according to excavation of the soil in the compacted sample box, and the soil chamber has an output port at one side, through which the soil is discharged; a small blade provided at a lower end of the soil chamber and having a cutting tool for excavating the soil in the compacted sample box and a small foam inlet port for injecting a foaming agent to the sand; a servo motor for rotating the small blade; a soil discharge unit provided at the soil discharge port to adjust a discharge amount of the soil to be discharged; a loading unit for moving the small blade to the sand to apply a vertical load to the sand; and a foam injecting unit for injecting the foam having a predetermined compounding ratio to the foam injecting port. It is possible to exactly simulate the same mechanism as the soft-ground TBM, thereby predicting the performance of the TBM according to properties of the ground.

Description

TECHNICAL FIELD [0001] The present invention relates to a test apparatus for predicting the performance of a soft ground tunneling boring machine,

The present invention relates to an apparatus and a test method for evaluating the performance of a pavement for predicting the performance of the TBM of the soil.

The tunnel excavation method is divided into a conventional tunneling method represented by NATM (New Austrian Tunneling Method) and a mechanized tunneling method represented by Open and Shield TBM (Tunnel Boring Machine) method. Conventional tunnel construction method has many problems such as personnel cost, construction period and safety problems.

Mechanized tunnel method is widely used to solve these problems. The mechanized tunnel method is an eco-friendly tunnel excavation method that can secure stability, minimize noise and vibration by minimizing ground deformation because it is mechanically stable, excitation with no vibration and no blasting because it is excavated with circular cross section.

Recently, excavation of tunnels and underground spaces have been carried out in subway, electric power, and communication tunnel tunnels instead of existing blasting methods in order to increase worker safety, reduce civil complaints caused by noise and vibration, and reduce air and air costs. The construction of mechanization by TBM is on the increase. FIG. 1 is a conceptual view of tunnel construction using a TBM (tunnel boring machine) 1. FIG.

Generally, blasting methods in tunnel construction are difficult to cope with noise, vibration and deformation after excavation. However, TBM can be applied to various grounds such as underground, soft ground, and riverbed with low noise and vibration, and it is constructed by inserting a cylinder with a sharp peripherally sharp steel sheet into the tunnel and excavating the inside of the cylinder.

However, the process of excavating a tunnel using a tunnel boring machine may cause unpredictable safety accidents depending on the various conditions of the ground, and the drilling is interrupted, which causes a problem of drastically increasing the cost for tunnel excavation. In addition, recent tunnel tendency has caused problems more frequently during the construction process.

In order to solve this problem, there has been an attempt to preliminarily simulate the excavation process by a tunnel boring machine by numerical analysis. However, numerical analysis has a problem of low accuracy because it is difficult to reproduce the local condition by converting the rock properties of the ground and the shape of the structure. By more precisely analyzing the excavation process by the tunnel boring machine, it is possible to predict all the processes that actually perform the tunnel construction, and by controlling the operating conditions of the tunnel boring machine when the tunnel boring machine is pivoted on the basis of the prediction results, There is an urgent need to make it possible to construct a tunnel quickly.

In the case of the TBM, the foaming agent containing foam agent, water, and air is used to maintain the surface pressure of the soil, to smooth excavation and clay, and to minimize the abrasion of the cutting tool (disc cutter or cutter bit) And injected into excavation surfaces and chambers. Fig. 2 is a photograph showing the foam spraying foreground of the soil material TBM. Fig. 3 shows a plot of the TBM pumping speed change according to the foam combination, and Fig. 4 shows a photograph of the worn TBM cutting tool. Also, as shown in FIG. 3, depending on the soil properties, the formulations of the foam, water, and air affect the TBM pumping speed and the load of the equipment.

Prior art 1 (Korean Patent No. 1322125) describes a TBM drilling simulation test apparatus. 5 shows a cross-sectional view of a TBM simulation test apparatus according to the prior art 1. Fig. A tester according to Prior Art 1 is a trench simulation apparatus for a tunnel boring machine for excavating a reduced-size ground, comprising: a cutter head rotatably installed to excavate a ground; A header disposed at a rear of the cutter head and having a through hole formed between the cutter head and the cutter head to form a chamber into which a force is applied in front of the partition; A drive motor for rotationally driving a central rotary shaft of the cutter head; A segment formed in the rear of the header to form a contour to prevent the introduction of a force; A screw conveyor arranged obliquely upwardly from the chamber for conveying backward the buckling excavated by the cutter head; A conveyor belt conveyed backward by the screw conveyor and installed in the segment; A cylinder for driving the header to move forward in a state in which the cutter head is rotated to excite the reduced model ground; A load cell measuring a force applied between the cylinder and the header; And a sensor for measuring a pushing distance of the cutter head.

However, this prior art 1 is directed to a small TBM simulation test apparatus for excavating a reduced scale ground, but it is impossible to measure the torque, thrust, and monitoring of the test apparatus, and TBM specifications can not be calculated according to the ground conditions. In addition, there is a disadvantage that it is also impossible to predict the wear of the TBM of the soil.

In addition, Prior Art 2 (Korean Patent No. 1293337) discloses a downward punching apparatus using a TBM and a punching method using the same. 6 is a cross-sectional view of a perforating apparatus according to Prior Art 2. [

BACKGROUND ART [0002] Conventional art 2 relates to a downward punching apparatus using a TBM and a punching method using the same, and more particularly, to a punching apparatus using a downcomer, A TBM (Tunnel Boring Machine) is installed upwards so that the diameter of the cutter head faces downward and is moved downward along the inside of the casing to puncture the downward hole. When the TBM is drilled, And an expanding / contracting means fixed to an inner surface of the casing so as to support an upper side of the TBM and fixed in the casing for moving the TBM downward.

According to the above-described prior art 2, the TBM having the cutter head of the diameter corresponding to the diameter of the downward hole to be formed is guided by the casing and the expanding and contracting means, and the upper side is supported, It is possible to easily drill the hole, thereby reducing the work process and time, and improving the working efficiency.

However, this prior art 2 is related to the downward punching technology itself (such as installation and propulsion jack extension), and it is impossible to measure and control detailed parameters such as torque and thrust of the device itself, and does not describe the configuration for the foam injection at all.

In the prior arts 1 and 2, it is not possible to calculate the TBM specification according to the ground condition, and since the actual behavior of the TBM of the soil (ie, the form injection, excavation and clay) , Cutting tool wear, TBM machine thrust, torque, etc.) can not be predicted and tested.

Therefore, equipment and method are required to accurately predict and test TBM performance by simulating the ground excavation principles of actual soil foundation TBM.

Korean Patent No. 10-1322125 Korea Patent No. 10-1293337

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide an apparatus and a method for accurately analyzing a mechanism (excavation, soil, The present invention provides a test apparatus for predicting the TBM performance (eg, yield rate, cutting tool wear, etc.) and an analysis method using the same.

In addition, according to one embodiment of the present invention, it is possible to precisely control the main parameters of the actual soil foundation TBM including the excavation surface on which the foam is sprayed, the earthworks chamber, the blade, the screw conveyor, The present invention provides a test apparatus capable of evaluating the TBM rolling performance and an analysis method using the same.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

A first object of the present invention is to provide an apparatus for evaluating soil earth TBM pumping performance, comprising: a housing; A compaction sample box provided at a lower end of the housing, the compartment being opened at an upper portion thereof and having a compaction soil inside; A soil chamber formed at the upper side of the compaction sample box in the housing, the soil chamber being formed by the excavation of the soil in the compaction sample box, the clay being introduced into the interior of the compaction sample box; A compact blade provided at a lower end of the soil chamber and provided with a cutting tool for excavating the soil within the compaction sample box and a foam inlet through which the foam is injected toward the soil side; A servo motor for rotating the small blade; A clay unit provided in the clay so as to adjust an amount of clay to be clay; A lower portion for moving the small blade toward the soil side to apply a vertical load to the soil side; And a foam injecting means for injecting a foam having a mixing ratio set to the side of the foam injection port.

In addition, a pressure cell for measuring earth pressure is provided at one side of the soil gravel chamber to measure the earth pressure by the introduced gravel in real time.

In addition, the compaction sample box may be configured as a multi-stage complex so that two or more units can be assembled and separated in the longitudinal direction, and each compartment can be compaction-compatible.

In addition, the cutting tools provided on the small blade may be spaced apart from each other by a predetermined distance, and may have a plurality of distances different from the center point.

In addition, it is also possible to provide a rotating speed measuring device for measuring the rotating speed of the small blade in real time, a rotating torque measuring device for measuring the rotating torque of the small blade in real time, And a penetration load load cell.

The clay unit includes a clay pipe having a lower end connected to the clay ball and having a discharge end at an upper side thereof, a clay screw configured to be detachable in the clay balloon, And a rotation driving unit.

The apparatus may further include an exhaust amount adjusting unit for adjusting an amount of exhaust gas discharged by varying the opening area of the discharge end.

The control unit may further include a pressure monitoring cell for measuring the earth pressure, the rotation speed measuring unit, the rotation torque measuring unit, and a control monitoring unit for receiving the measured values from the penetration load load cell in real time.

The control monitoring unit may receive the measured values from the earth pressure measuring pressure cell, the rotational speed measuring unit, the rotational torque measuring unit, and the penetration load load cell in real time, The rotation driving unit, the delivery amount adjusting unit, and the foam injecting unit.

A second object of the present invention is to provide a system for predicting and analyzing the pumping performance of a soil material TBM using a TBM testing apparatus, comprising: a test apparatus according to the first aspect; And analyzing means for predicting and analyzing the TBM performance based on the penetration load, the foam injection amount, the earth pressure, the rotational torque value, the rotational speed, the abrasion amount of the cutting tool after the test, The TBM performance prediction analysis system according to claim 1,

A third object of the present invention is to provide a method for evaluating the TBM performance of a soil based on the above-mentioned first object, comprising the steps of: holding a soil sample whose particle size is adjusted in a compaction sample box; Moving a small blade at a lower end of the soil chamber through a load receiving portion to load a vertical load on the sample; A foam is injected through a foam injection port provided in the small blade, and the small blade is rotated by a servo motor to be excavated; And estimating and analyzing the TBM performance based on the amount of abrasion of the cutting tool mounted on the small blade and the state of the clayed sample after the end of the test, and evaluating the performance of the TBM Can be achieved.

In the step of dipping, the type of the test sample is determined, and the sample with the particle size set in a plurality of compaction sample boxes is contained and the compaction sample box is tightened after compaction of the layers.

In addition, in the excavating step, the earth pressure caused by the earth soil introduced into the pressure cell for measuring the earth pressure installed on one side of the earthworks chamber is measured in real time, the rotation speed measuring unit measures the rotation speed of the small blade in real time, The torque measuring unit measures the rotational torque of the small blade in real time and measures the load applied to the small blade by the penetration load load cell in real time.

In the excavating step, the rotation driving unit for driving the clay screw of the clay apparatus is controlled based on the measured value to adjust the pressure in the clay chamber, and the foam injection means is controlled to control the amount of foam to be sprayed , And the rotation speed of the small blade is adjusted.

Also, the analyzing step predicts and analyzes the TBM performance based on the penetration load value, the foam injection amount, the earth pressure, the rotational torque value, the rotational speed, the abrasion amount of the cutting tool after the test, . ≪ / RTI >

According to an embodiment of the present invention, the TBM performance (the yield rate, the cutting tool wear, etc.) of each soil property can be predicted by accurately simulating the same mechanism (excavation, soil, foam injection, etc.) as the actual soil foundation TBM .

In addition, according to one embodiment of the present invention, it is possible to precisely control the main parameters of the actual soil foundation TBM including the excavation surface on which the foam is sprayed, the earthworks chamber, the blade, the screw conveyor, It is possible to minimize the equipment load such as torque of TBM cutter head, torque of screw conveyor and minimize the abrasion of cutting tool (ripper, scraper, etc.) through test equipment which can evaluate TBM performance by excavation, And it has an effect of minimizing the subsidence of the ground due to the smooth pressing surface pressure maintenance.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
FIG. 1A is a conceptual view of TBM tunnel construction,
FIG. 2 is a photograph showing the foam spraying foreground of the soil material TBM,
FIG. 3 is a graph of the TBM pumping speed change according to the foam combination,
Figure 4 shows a worn TBM cutting tool photo,
5 is a sectional view of a TBM simulation test apparatus according to Prior Art 1,
6 is a cross-sectional view of a perforating apparatus according to Prior Art 2,
FIG. 7 is an overall configuration diagram of a polishing performance evaluation test apparatus for predicting the performance of the soil layer TBM according to an embodiment of the present invention;
FIG. 8A is a partial perspective view of a tilting performance evaluation test apparatus for predicting the performance of the soil layer TBM according to an embodiment of the present invention; FIG.
FIG. 8B is a partial cross-sectional view of a tilting performance evaluation test apparatus for predicting the performance of the soil layer TBM according to an embodiment of the present invention;
9A and 9B are a bottom view of a small blade according to an embodiment of the present invention,
9C is a perspective view of a cutting tool according to an embodiment of the present invention,
10 is a partial cross-sectional view of a clay unit according to an embodiment of the present invention,
11 is a block diagram showing a signal flow of a control monitoring unit according to an embodiment of the present invention;
FIG. 12 is a flowchart illustrating a method for evaluating the performance of soil-borne TBM performance prediction according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Also in the figures, the thickness of the components is exaggerated for an effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional views and / or plan views that are ideal illustrations of the present invention. In the drawings, the thicknesses of the films and regions are exaggerated for an effective description of the technical content. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in the shapes that are produced according to the manufacturing process. For example, the area shown at right angles may be rounded or may have a shape with a certain curvature. Thus, the regions illustrated in the figures have attributes, and the shapes of the regions illustrated in the figures are intended to illustrate specific forms of regions of the elements and are not intended to limit the scope of the invention. Although the terms first, second, etc. have been used in various embodiments of the present disclosure to describe various components, these components should not be limited by these terms. These terms have only been used to distinguish one component from another. The embodiments described and exemplified herein also include their complementary embodiments.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms "comprises" and / or "comprising" used in the specification do not exclude the presence or addition of one or more other elements.

In describing the specific embodiments below, various specific details have been set forth in order to explain the invention in greater detail and to assist in understanding it. However, it will be appreciated by those skilled in the art that the present invention may be understood by those skilled in the art without departing from such specific details. In some instances, it should be noted that portions of the invention that are not commonly known in the description of the invention and are not significantly related to the invention do not describe confusing reasons to explain the present invention.

Hereinafter, the configuration and function of the pumping performance evaluation test apparatus 100 for predicting the performance of the soil pavement TBM according to an embodiment of the present invention will be described. First, FIG. 7 shows an overall configuration of a polishing performance evaluation test apparatus 100 for predicting the performance of a soil-borne TBM according to an embodiment of the present invention. FIG. 8A is a partial perspective view of a polishing performance evaluation test apparatus 100 for predicting the performance of the soil layer TBM according to an embodiment of the present invention, and FIG. 8B is a partial perspective view of the soil layer TBM 1 is a partial cross-sectional view of a polishing performance evaluation test apparatus 100 for performance prediction.

7, 8A and 8B, the polishing performance evaluation test apparatus 100 for estimating the performance of the soil layer TBM according to an embodiment of the present invention includes a housing 101, a compaction sample box 120, It can be seen that it can be configured to include the soil sand chamber 110, the small blade 130, the servo motor 103, the clay unit 140, the lower load lower portion 150, the foam injection means 105 and the like.

The housing 101 constitutes the outer frame of the test apparatus 100 and includes an upper plate 102. The upper plate 102 is mounted with a servomotor 103, (105), and is connected to the rotating shaft (151). The rotary shaft 151 is rotated about the longitudinal axis by the servo motor 103 to rotate the small blade 130 connected to the lower end of the rotary shaft 151, as will be described later. As shown in FIG. 8B, the rotary shaft 151 may be configured to include a foam injection pipe 104 and to introduce a foam Foam mixed at a foam mixing ratio set by the foam injection means 105.

As shown in FIG. 8B, the compaction sample box 120 according to an embodiment of the present invention is provided at the lower end of the housing 101, and the upper portion thereof is opened and the compaction soil sample is provided therein. In addition, the compaction sample box 120 may be composed of a composite ground that is composed of multiple stages so that two or more units can be assembled and separated in the longitudinal direction, and each compartment can be compaction-compatible. That is, the sample box 120 can be separated and combined, and a packing seal for maintaining pressure can be provided in the sample box 120.

The soil and soil chamber 110 according to an embodiment of the present invention is provided in the housing 101 and on the upper side of the compaction sample box 120 and is installed in the body 102 by excavation of the soil sample in the compaction sample box 120, And a clay ball 113 into which the clay is introduced into the inside and the clay that has flowed into one side is clay is formed.

As described later, the small-sized blades 130 are positioned on the lower side of the soil-erosion chamber 110, and the clogs 113 are formed on the upper plate. As shown in FIG. 8A, on one side of the top plate of the sandwiching chamber 110, the earth pressure by the introduced soil is measured in real time. In addition, a packing seal may be attached to maintain the pressure in the soil sand chamber 110.

The small blade 130 is connected to the lower end of the rotary shaft 151 constituted by the foam injection pipe 104 and is positioned at the lower end side of the sandwiching chamber 110 and excavates the soil within the compaction sample box 120 And a foam injection port 132 through which the foam is injected toward the sand side.

FIGS. 9A and 9B show a bottom view of a small blade 130 according to an embodiment of the present invention, and FIG. 9C shows a perspective view of a cutting tool 131 according to an embodiment of the present invention. 9B, the cutting tool 131 provided on the small blade 130 is spaced apart from each other by a predetermined distance, and a plurality of cutting tools 131 having different distances from the center point, ≪ / RTI >

In addition, the rotational speed measuring unit 133 measures the rotational speed of the small blade 130 in real time. During excavation, the rotational torque measuring unit 134 measures the rotational torque of the small blade 130 in real time. In addition, the intrusion load cell 135 measures the load applied to the small blade 130 in real time during excavation.

In addition, the foam injection port 132 is also composed of a plurality of foam, and the foam introduced into the foam purchase pipe by the foam injection means 105 is injected by the foam injection port 132 into the soil sample. As shown in FIG. 9A, the plurality of foam injection ports 132 are spaced apart from one another in the circumferential direction, and they are located at different distances from the center point.

The clay unit 140 is connected to a clay ball 113 formed on a top plate of the clay soil chamber 110 to control the pressure in the clay soil chamber 110 by adjusting the amount of clay soil discharged. 10 illustrates a partial cross-sectional view of a clay unit 140 according to an embodiment of the present invention.

8A, 8B, and 10, the clay unit 140 includes a clay tube 141 having a lower end connected to the clog 113 and having a discharge end 143 on the upper side, A clay screw 142 configured to be attachable and detachable within the clay tube 141 and a rotation driving unit 144 for rotating the clay screw 142 with respect to the longitudinal axis. As shown in FIG. 10, the opening area of the discharging end 143 may be varied, including the discharging amount adjusting unit 145, so that the discharged amount of the discharged toner can be adjusted.

Therefore, the testing apparatus 100 according to an embodiment of the present invention can perform the excavation of soil samples, the soil and the foam spraying of the soil sample in a small size, so that the same conditions as those of the actual soil foundation TBM can be realized do.

11 is a block diagram showing a signal flow of the control monitoring unit 160 according to an embodiment of the present invention. 11, the control monitoring unit 160 includes the pressure measuring cell 111 for measuring the earth pressure, the rotational speed measuring unit 133, the rotational torque measuring unit 134, the penetrating load cell 135) are received in real time.

The control monitoring unit 160 calculates the values measured by the pressure cell 111 for measuring the earth pressure, the rotational speed measuring unit 133, the rotational torque measuring unit 134 and the intrusion load cell 135 And controls the drive of the servomotor 103, the lower subassembly 150, the rotary drive 144, the delivery quantity regulator 145 and the form injection means 105 to a set value do.

That is, the control monitoring unit 160 receives the internal pressure of the soil gravel chamber 110 through the earth pressure measuring pressure cell 111 in real time, and controls the rotation driving unit 144 and the discharge amount adjusting unit 145, And the pressure in the soil and soil chamber 110 is controlled. The control monitoring unit 160 controls the lower portion 150 based on the load value measured by the penetration load cell 135. The control monitoring unit 160 controls the rotation speed measuring unit 133 and the rotation torque measuring unit 134, The servo motor 103 is controlled based on the measured value to adjust the rotation speed of the small blade 130 and the foam injection means 105 to control the injection amount of the foam to be injected.

The analyzing means 170 analyzes the penetration load, the foam injection amount, the earth pressure, the rotation torque value, the rotation speed, and the wear amount of the cutting tool 131 after the test by the test apparatus 100 according to the embodiment of the present invention , And TBM performance is predicted and analyzed based on the state of the clayed sample.

Therefore, according to one embodiment of the present invention, it is possible to accurately predict the TBM performance (yield rate, abrasion of the cutting tool 131, and the like) of each soil property by accurately simulating the same mechanism (excavation, soil, have. That is, the main parameters of the actual soil foundation TBM are precisely controlled by the excavation surface on which the foam is sprayed, the sandstone chamber 110, the small blade 130 and the clay unit 140, Excavation, clay) to evaluate TBM rolling performance.

Hereinafter, a method and a method for evaluating a pumping performance for predicting the performance of the soil material TBM according to an embodiment of the present invention will be described. FIG. 12 is a flowchart illustrating a method for evaluating the performance of soil-borne TBM performance prediction according to an embodiment of the present invention.

First, the type of soil sample to be tested is determined (S1). Then, the soil sample in which the particle size is adjusted is contained in the compaction sample box 120. That is, a plurality of compaction sample boxes 120 are filled with the samples to which the particle size is adjusted, and then compaction of the compaction sample box 120 is performed (S2).

Then, the small blade at the lower end of the sandwiching chamber 110 is moved through the lower portion 150 of the load material to load the vertical load in the soil sample (S3). The foam is injected through the foam injection port 132 provided in the small blade 130 and the small blade 130 is rotated by the servo motor 103 to excavate the soil sample (S4).

The excavated soil in the soil-soil chamber 110 is removed through the clay unit 140 to control the pressure in the soil-soil chamber 110 (S5).

In this step, the earth pressure measured by the earth moving in the pressure cell 111 is measured in real time, and the rotational speed measuring unit 133 measures the earth pressure of the small blade 130 The rotational torque is measured in real time and the rotational torque measuring unit 134 measures the rotational torque of the small blade 130 in real time and the load applied to the small blade 130 by the intrusive load cell 135 is measured in real time .

The control monitoring unit 160 controls the rotation driving unit 144 that drives the clay screw 142 of the clay unit 140 to adjust the pressure in the clayey chamber 110 based on the measured value, Controls the means 105 to control the amount of foam to be sprayed, and adjusts the rotational speed of the small blade (S6).

Then, after the end of the test (S7), the TBM performance is predicted and analyzed based on the amount of wear of the cutting tool 131 mounted on the small blade and the state of the cleaned sample (S8) (S9). That is, the TBM performance is predicted and analyzed on the basis of the penetration load value, the foam injection amount, the earth pressure, the rotation torque value, the rotation speed, the wear amount of the cutting tool 131, and the condition of the clayed sample at the time of excavation.

It should be noted that the above-described apparatus and method are not limited to the configurations and methods of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments are selectively combined .

100: Foam-mixed soil-shear strength test equipment for optimum foam formulation design
101: Housing
102: upper plate
103: Servo motor
104: Foam injection tube
105: Foam injection means
110: Dirt chamber
111: Pressure cell for earth pressure measurement
112: Body
113:
120: compaction sample box
130: Small blade
131: Cutting tool
132: Foam injection port
133: rotational speed measuring unit
134: Rotational torque measuring unit
135: Intrusive load cell
140: Clay unit
141:
142: Plaster screw
143: Discharge end
144:
145:
150: lower part
151:
160:
170: Analysis means

Claims (15)

In the soil sand TBM rolling performance evaluation test apparatus,
housing;
A compaction sample box provided at a lower end of the housing, the compartment being opened at an upper portion thereof and having a compaction soil inside;
A soil chamber formed at the upper side of the compaction sample box in the housing, the soil chamber being formed by the excavation of the soil in the compaction sample box, the clay being introduced into the interior of the compaction sample box;
A compact blade provided at a lower end of the soil chamber and provided with a cutting tool for excavating the soil within the compaction sample box and a foam inlet through which the foam is injected toward the soil side;
A servo motor for rotating the small blade;
A clay unit provided in the clay so as to adjust an amount of clay to be clay;
A lower portion for moving the small blade toward the soil side to apply a vertical load to the soil side; And
And a foam injecting means for injecting a foam having a mixing ratio set to the side of the foam injection port.
The method according to claim 1,
And a pressure cell for measuring the earth pressure is installed on one side of the soil gravel chamber to measure the earth pressure by the introduced gravel in real time.
3. The method of claim 2,
Wherein the compaction sample box is composed of a multi-stage multi-stage so that two or more units can be assembled and separated in the longitudinal direction, and each compartment is composed of a composite ground capable of compaction. Device.
The method of claim 3,
Wherein the cutting tools provided on the small blade are spaced apart from each other by a predetermined distance and have a plurality of distances different from the center point.
5. The method of claim 4,
A rotating speed measuring unit for measuring a rotating speed of the small blade in real time, a rotating torque measuring unit for measuring a rotating torque of the small blade in real time, a penetration load measuring unit for measuring a load applied to the small blade in real time Wherein the load cell comprises a load cell.
6. The method of claim 5,
The clay unit comprises:
And a rotatable driving unit for rotatably driving the rototrocheon screw about a longitudinal axis of the rotary shafts. The rotary shafts of the rotary shafts are rotatably mounted on the shafts. A performance evaluation test system for predicting the TBM performance of the soil.
The method according to claim 6,
Further comprising a discharge amount adjusting unit for adjusting an amount of discharged soil by varying an open area of the discharge end.
8. The method of claim 7,
Further comprising a control monitoring unit for receiving the measured values of the earth pressure measuring pressure cell, the rotational speed measuring unit, the rotational torque measuring unit and the intrusion load load cell in real time, A test device for evaluating the performance of pushing.
9. The method of claim 8,
The control monitoring unit,
Wherein the control unit receives the measured values of the earth pressure measuring pressure cell, the rotational speed measuring unit, the rotational torque measuring unit, and the penetration load load cell in real time and controls the servo motor, Wherein the control unit controls the discharge amount adjusting unit and the foam injecting unit.
A system for predicting and analyzing the pumping performance of a soil-to-ground TBM using a TBM testing apparatus,
10. A test apparatus according to any one of claims 1 to 9, And
The analysis means for predicting and analyzing the TBM performance based on the penetration load, the foam injection amount, the earth pressure, the rotation torque value, the rotation speed, the abrasion amount of the cutting tool after the test, The TBM performance prediction and analysis system of the present invention.
10. A method for evaluating the soil TBM rolling performance using a testing apparatus according to any one of claims 1 to 9,
Holding a soil sample whose particle size is adjusted within the compaction sample box;
Moving a small blade at a lower end of the soil chamber through a load receiving portion to load a vertical load on the sample;
A foam is injected through a foam injection port provided in the small blade, and the small blade is rotated by a servo motor to be excavated; And
And estimating and analyzing the TBM performance based on the amount of wear of the cutting tool mounted on the small blade and the state of the clayed sample after the end of the test.
12. The method of claim 11,
In the dewatering step,
Determining a type of the test sample, holding a sample whose particle size is adjusted in a plurality of compaction sample boxes, compaction of the compaction sample box, and fastening the compaction sample box.
13. The method of claim 12,
In the excavating step,
The soil pressure is measured in real time by a soil pressure introduced by a pressure cell for measuring the earth pressure provided at one side of the soil earth chamber and the rotational speed measuring unit measures the rotational speed of the small blade in real time, Wherein the torque is measured in real time and the load applied to the small blade by the penetration load cell is measured in real time.
14. The method of claim 13,
In the excavating step,
Controlling a rotation driving part for driving a clay screw of the clogging device based on the measured value to control the pressure in the clay chamber, controlling the amount of foam to be controlled by controlling the foam injection device, adjusting the rotation speed of the small blade Wherein the TBM performance prediction method comprises the steps of:
15. The method of claim 14,
Wherein the analyzing comprises:
The TBM performance is predicted and analyzed on the basis of the penetration load value, the foam injection amount, the earth pressure, the rotation torque value, the rotation speed, the abrasion amount of the cutting tool after the test, A method for evaluating the performance of a pendulum for prediction.

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