KR101765313B1 - Mobile type integration grouting apparatus and its grouting injection method - Google Patents

Abstract

The present invention relates to an integrated mobile grouting apparatus and a grouting method using the same. The objective of the present invention is to perform grouting in an optimal condition proper for a construction site with various site conditions, construction conditions, and geographical conditions by moving freely without limit of a site condition, a construction condition, and a geographical condition. According to the present invention, the integrated mobile grouting apparatus comprises: a frame which is fixated, to be able to be separated, to a platform of a moving vehicle; a grouting unit which is mounted on the frame; a control unit which controls the grouting unit and outputs grouting information on a screen; and a main test unit which is installed on the frame and tests the ground by injecting water into a grouting hole under the ground.

Description

[0001] The present invention relates to a mobile type integrated grouting apparatus and a grouting method using the same,

The present invention relates to a grouting apparatus and a grouting method, and more particularly,

Site conditions, construction conditions and geographical limitations such as general road tunnel and subway road tunnel and subway tunnel construction, subway tunnel construction, high speed railway tunnel construction, various mountain tunnel construction, river / reservoir newbuilding and repair work, slope reinforcement, soft ground handling The present invention relates to a mobile type integrated grouting apparatus and a grouting method using the same, wherein the grouting is performed in an optimal condition suitable for a construction site in various site conditions, construction conditions and geographical conditions.

With the development of industrialization, for the purpose of construction of ground and underground roads and railways, etc., excavation of general and subsea and submarine tunnels, treatment of soft ground, construction of steep slopes, and reservoirs and dams for natural disasters It is inevitable to reinforce the order. For this, stabilization measures are required to meet the stability of the construction, economical efficiency, and environment preservation.

For this purpose, a grouting method for reinforcement of a tunnel order, a soft ground reinforcement, a reservoir and a dam reinforcement, and a slope reinforcement is widely used. In the grouting method, a plurality of perforation holes are drilled at a site- A grouting material is injected into the perforation hole so that the grouting material injected in the space of the perforation hole is hardened and the surrounding ground is formed and reinforced.

The grouting equipment includes a hopper for supplying the grout material, a mixer for mixing the grout material, an agitator for agitating the grout material, a grout pump for pumping the agitated grout material, a grout material pumped by the grout pump, And grout hoses to be injected, and they are separately transported to a construction site by a transportation vehicle and fixedly installed and operated, which makes it difficult to operate in a place with poor geographical conditions such as a mountainous area.

Registration No. 10-0507896

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method of constructing a road tunnel, an underwater road tunnel and a underpass road tunnel, a tunnel for a high speed railway, various mountain tunnels, The present invention provides a mobile type integrated grouting apparatus and a grouting method using the same, wherein the grouting is performed in an optimal condition suitable for a construction site in various geographical conditions by freely moving without being subjected to site conditions, construction conditions and geographical restrictions such as reinforcement, It has its purpose.

A mobile integrated grouting apparatus according to the present invention comprises: a frame detachably fixed to a platform of a moving vehicle; A grouting portion mounted on the frame; A control unit for controlling the grouting unit to output control and grouting information; A grouting portion installed in the frame and injecting water into a grouting hole in the ground to test the ground, wherein the grouting portion includes a hopper for feeding the grout into the grout, a mixer for mixing the grout supplied from the hopper, A stirrer for stirring the grout material mixed by the grouting pump, a grouting pump for feeding the grout material stirred by the stirrer, a valve for controlling the amount of the grout material to be fed by the grouting pump, And a grouting hose for grouting the grout material pumped by the grouting pump into the ground, wherein the pouring water test portion is mounted on the frame and includes a pouring test portion for pouring water test before grouting , And the main test section A water tank for storing water for testing and a water main test pump for injecting water stored in the water tank into the ground, thereby moving the soil to the grouting construction site by the moving vehicle, testing the ground through the water main test section, And grouting through the grouting portion.

According to the mobile integrated grouting apparatus and the grouting method using the same, the grouting unit, the casting test unit, and the control unit are integrated with the frame to mount the frame on the moving vehicle, and the operator directly drives the moving vehicle to move to the grouting construction site Therefore, it is expected that the site conditions, construction conditions and geographical conditions such as general road tunnel and subway road tunnel and subway tunnel construction, subway tunnel construction, high speed railway tunnel construction, various mountain tunnel construction, river / reservoir newbuilding and repair work, slope reinforcement, The grounding characteristics of the construction site were tested at the construction site through the test section and the control section such as the casting test section mounted together with the grouting section on the frame without using a separate test apparatus, The optimal grouting conditions (material, injection pressure, etc.) are determined and grouted Workability and is excellent in an effect of reliably reinforce the ground.

1 is a side view showing the construction of a mobile type integrated grouting apparatus according to the present invention.
2 is a plan view showing the construction of a mobile type integrated grouting apparatus according to the present invention.
3 is a rear view of an upper lid and a lower shelf applied to a mobile type integrated grouting machine according to the present invention.
FIG. 4 is an illustration of a piping of a grouting pump applied to a mobile type integrated grouting apparatus according to the present invention. FIG.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

1 and 2, the mobile type integrated grouting apparatus according to the present invention includes a grouting unit 100 mounted on a moving vehicle 1 and moving to a construction site and grouting the ground at a construction site, A control section 300 for controlling the grouting and outputting grouting information on the screen, and a frame 400 for installing these (100, 200, 300) on the moving vehicle 1 do.

The frame 400 provides a space for installing grooves 100, 200, and 300 and is preferably a container shape of a hexahedron formed by combining a beam (H beam, I beam), an angle and an iron plate, 100, the main test section 200, and the control section 300, and the remaining one surface is configured to be retractable. The one side is configured to be openable and closable to protect the structures (100, 200, 300) for grouting during transportation and storage, and to operate and inspect structures (100, 200, 300) for grouting at the time of grouting. In addition, a buffering means (spring, elastic pad, etc.) for buffering the buffering structure described above is provided at the bottom of the frame 400, and the buffering means protects the above-mentioned structure from the grouting impact,

As shown in Fig. 3, for example, the lid is formed on one or more of left and right sides of a relatively larger area than the front and rear, and a single lid is also possible. However, And includes a cover 410 and a lower shelf 420. That is, the lower shelf 420 serves as a work space by opening and closing the lower portion of the opening portion of the frame 400, for example, horizontally spreading with the ground. In addition, a shelf is additionally housed in the lower shelf 420, so that a wider space can be secured. Further, a shelf to be added can be variously housed in a sliding type or a pivot type.

The upper cover 410 and the lower shelf 420 are hinged to the frame at their respective ends, and can be opened and closed by using a cylinder such as a hydraulic pressure as a driving means.

The frame 400 can be fixedly mounted on the moving vehicle 1 and can be fixedly mounted on the moving vehicle 1 so that it can be grouted while being mounted on the moving vehicle 1 at the time of grouting, It is also possible to carry out the grouting by getting off the moving vehicle 1 at the construction site after being transported to the construction site through the vehicle 1.

In the former case, the frame 400 is fixed to the moving vehicle 1 via various fixing means.

In the latter case, a leg supported by the ground is formed at the bottom of the frame 400. [ Of course, this leg is supported on the platform of the moving vehicle 1 and supported. In addition, leveling means can be applied to the legs of the frame 400 to stably install the grouting portion 100 and the grouting operation smoothly regardless of the road surface of the construction site.

The leveling means may be an out trigger or the like.

The grouting unit 100 includes at least one hopper 110, a mixer 120 for mixing the grout supplied from the hopper 110, a mixer 120 for mixing the grout supplied from the hopper 110, A grouting pump 140 for pressurizing the grout mixed material stirred by the stirrer 130 and a control unit 130 for controlling the amount of grout pressurized by the grout pump 140 A valve 150 and a measuring device 160 for measuring the flow rate and pressure of the grout mixed material being pressure-fed by the grouting pump 140, a grouting hose 170 for discharging the grout mixed material pressed by the grouting pump 150 for grouting, These components 110, 120, 130,... Are installed in the frame 400, and are detachably fixed to the frame 400 for replacement due to failure, and various fixing methods are possible, But it is not limited to.

The hopper 110 is installed in the frame 400 as a structure having an inlet at an upper end and an outlet at a lower end. The inlet is configured to be openable and closable so as to prevent contamination during transportation and storage, Do.

The hopper 110 is supplied with grout material before being transported to a construction site, and is supplied to the mixer 120 through a feeding means 111 at a construction site (it is also possible to feed a grout material at a construction site) In case of tunnel reinforcement grouting, the volume is 1.17 ~ 1.56m ³ (capacity 1,700 ~ 2,250kg) so that 10 holes (about 4,000kg of cement amount) can be simultaneously applied.

The feeding means 111 may include a feeding pipe having one side connected to the discharge end of the hopper 110 while the other side is connected to the upper input port of the mixer 120 while being inclined and a motor (hydraulic motor) And a feeding screw that is rotatably installed to feed the grout material supplied from the hopper 110. The rotation speed of the hydraulic motor is 100 RPM, and the discharge amount may be about 80-150 kg / min.

When two or more hoppers 110 are applied, simultaneous operation can be performed, one by one, based on a predetermined order.

The hopper 110 can be configured to be height-adjustable so that it can be used at a height suitable for the site conditions during use without being restricted by the height of the mobile.

The mixer 120 mixes and receives the grout material through the feeding means 111, and is preferably a colloidal mixer type, which facilitates homogeneous mixing of the high-powder cement and mixing of the particles by the impeller.

A mixer tank and an impeller which is installed in the mixer tank and mixes the grout material in the mixer tank, and the rotation speed of the mixer is 1,300 to 1,400 RPM.

The stirrer 130 serves to maintain a low viscosity and to prevent precipitation. Also, the material stirred in the mixer 120 is kept for a predetermined period of time without causing material separation, and the foam is removed. The rotation speed is 60 ~ 65RPM.

The grouting pump 140 pumps the grouting material agitated by the agitator 130 for grouting and applies a suitable high pressure to secure a sufficient penetration range. The piston type is a double action piston type, Is 60 kg / cm < ² >, for example, the main working pressure is 20 kg / cm < ^{2 &} gt ;. The maximum injection rate is 100 l / min and the minimum injection rate is 10 l / min.

4 shows an application example of the piping of the grouting pump 140 and the valve 150 and the measuring device 160. The feed pipe 141 is provided on the discharge side of the grouting pump 140, First and second switching valves 151 and 152 for controlling the supply amount of the grout material, and a meter 160 for measuring the flowmeter and the pressure gauge are installed and the grouting hose 170 is connected. The first switching valve 151 connects the grouting pump 140 and the main test pump 210 of the main test section 200. The second switch valve 152 connects the pressure feeding pipe 141 and the return pipe 142, Lt; / RTI > The first switch valve 151 connects the grouting pump 140 or the main test pump 210 to the pressure feed pipe 141 and the second switch valve 152 connects the return pipe 142 and the pressure feed pipe 141 Connect. Further, a valve for regulating the flow rate of the feed pipe 141 may be configured.

The grouting hose 170 is provided with a packer for pressurized grouting.

The main test section 200 includes a water tank 220 installed in the frame 400 and capable of performing a water test before grouting, in which water for the main test is stored, water stored in the water tank 220, 4, the pumping test pump 210 is connected to the first valve 151 and shares the pressure feeding pipe 141. As shown in FIG.

The control unit 300 includes a sensor for sensing various information for grouting, a microcomputer (program) for processing (calculating) the sensed value of the sensor, and a monitor for outputting grouting information. The control unit 300 calculates groundwater inflow, Calculation, calculation of grouting pressure, calculation of injection time, algorithm grouting, calculation of removal strength of packer, etc., and material selection and grouting injection effect can be applied to the field after simple calculation and field test .

A mobile type integrated grouting method according to the present invention includes a first step of moving a mobile type integrated grouting equipment to a grouting construction site; The grouting hose of the mobile type integrated grouting equipment is inserted into a grouting hole formed in the ground, water is injected into the grouting hole through a main test portion, and the grout material is tested by selecting the grout material and the injection pressure is calculated A second step; A third step of activating the grouting part of the mobile type integrated grouting equipment and injecting the selected grout material through the second step into the grouting hole at the calculated injection pressure and grouting; And a fourth step of finishing the grouting or controlling the injection of the grouting after the completion of the grouting in the third step, wherein the grounding property test performed in the second step is a calculation of a groundwater inflow calculation, a calculation of a joint interval, Calculation of the injection expected time, algorithm grouting, calculation of the removal strength of the packer, and determination of the grouting injection effect.

1. Calculation of groundwater inflow.

The amount of groundwater inflow can be calculated using the following formula. Equation (1) is used in rock mass before grouting and Equation (2) is used in rock mass after grouting. The amount of groundwater inflow before and after the injection can determine the effect before and after grouting.

식(1)

Equation (1)

식(2)

Equation (2)

= 터널에 유입량 (

)

= Inflow to the tunnel (

)

= 그라우트된 영역 밖에서 암반의 수리전도도(m/s)

= Hydraulic conductivity of the rock outside the grouted area (m / s)

= 그라우트된 영역에서의 수리전도도(m/s)

= Hydraulic conductivity in grouted area (m / s)

= 터널 중심에서 물의 수두로서 물의 압력으로 표현됨(m)

= Expressed as the pressure of water as the head of water at the center of the tunnel (m)

= 터널의 반경 (m)

= Radius of tunnel (m)

= 활동하는 물의 반경(m), 일반적으로

로 예측함

= Radius of active water (m), generally

Predicted by

= 그라우트존의 범위 (m)

= Range of grout zone (m)

= 접촉 상수 (the skin factor) (-)

= The skin factor (-)

2. Joint interval calculation formulas and program implementation

The joint spacing can be calculated using the following equation (3). The result of the joint interval calculation is used in the material selection method.

식(3)

Equation (3)

                 here,

= 침투계수 (

)

= Penetration coefficient (

)

= 절리의 수리적 간격 (m)

= The numerical spacing of joints (m)

= 중력 가속도 (

)

= Gravitational acceleration (

)

= 물의 동 점성 (Pas)

= The viscosity of water (Pas)

= 물의 밀도 (

)

= Density of water (

)

3. Selection of materials.

)는 상기 식(3)을 이용하여 계산한 절리간격 계산값(b)보다 3배정도 적게 한다.Average size distribution size of cement material (

) Is made to be three times smaller than the joint interval calculation value (b) calculated using the above formula (3).

식(4)

Equation (4)

The number of divisors in Equation (4) can vary depending on the number of various influencing factors, and the value can be widely varied from 2 to 16.

4. Calculation of grouting pressure.

)은 아래 식(5)에 의해 계산한다.
Grouting pressure (

) Is calculated by the following equation (5).

식(5)

Equation (5)

                  here,

= 그라우팅 압력(Pa)

= Grouting pressure (Pa)

= 지하수위 압력(Pa)

= Groundwater pressure (Pa)

= 암반의 밀도(

)

= Density of rock mass

)

)
g = gravitational acceleration (

)

5. Calculation of injection time estimate.

Equation (6) is the one-dimensional expected injection time calculation formula, and (7) is the two-dimensional injection expected time calculation formula.

식(6)

Equation (6)

식(7)

Equation (7)

             here,

= 상대적 침투길이

= Relative penetration length

= 상대적 그라우팅 시간

= Relative grouting time

6. Algorithm grouting.

Algorithm We use Eq. (8) in soil layer (3D) during grouting and use Eq. (9) in rock mass 1D (1D) and Eq. (10) in 2D (2D).

식(8)
Soil Layer (3D):

Equation (8)

here,

:

시간 동안의 주입량,

: 전체주입량,

: 초기 천공시 구근의 반지름,

: i시간 동안 증가되는 구근의 반지름,

: i시간 동안 변하는 지반의 공극률,

: i시간에서의 측정간격시간,

: 그라우트재의 단위중량,

: 지반의 고유투수계수를 의미한다.
In equation (8)

:

The amount of time,

: Total dose,

: The radius of the bulb during initial puncture,

: the radius of the bulb increased for i hours,

: the porosity of the ground which varies over time i,

: measurement interval time in i time,

: Unit weight of grout material,

Means the inherent permeability coefficient of the soil.

식(9)
Rock layer 1D:

Equation (9)

:

시간 동안의 주입량,

: 전체주입체적의 미분값,

: 상대적침투길이의 미분값,

: 그라우팅 시간,

: 주입압력,

: 재료의 초기 항복강도,

: 절리의 폭,

: 절리의 두께를 의미한다.
In equation (9)

:

The amount of time,

: Derivative value of the entire main body,

: Derivative value of relative penetration length,

: Grouting time,

: Injection pressure,

: Initial yield strength of the material,

: Width of joint,

: It means the thickness of the joint.

식(10)
The rock layer (2D):

Equation (10)

:

시간 동안의 주입량,

: 전체주입체적의 미분값,

: 상대적침투길이의 미분값,

: 그라우팅 시간,

: 주입압력,

: 재료의 초기 항복강도,

: 절리의 두께를 의미한다.
In equation (10)

:

The amount of time,

: Derivative value of the entire main body,

: Derivative value of relative penetration length,

: Grouting time,

: Injection pressure,

: Initial yield strength of the material,

: It means the thickness of the joint.

7. Calculate the removal strength of the packer.

The shear strength of the grout at the time of removal of the packer is calculated by the following equation (11).

식(11)

Equation (11)

            here,

= 지하수 압력(Pa)

= Groundwater pressure (Pa)

= 천공홀의 길이(m)

= Length of perforation hole (m)

= 천공홀의 반경(m)

= Radius of perforated hole (m)

= 그라우트의 전단응력(Pa)

= Shear stress of grout (Pa)

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood, however, that the invention is not to be limited to the specific forms thereof, which are to be considered as being limited to the specific embodiments, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims. .

1: Moving vehicle,
100: grouting portion, 110: hopper
120: mixer, 130: stirrer
140: grouting pump, 150: valve
160: measuring instrument, 170: grouting hose
200: main test section, 210: main test pump
220: water tank, 300: control unit
400: frame,

Claims (5)

A frame detachably secured to the platform of the moving vehicle;
A grouting portion mounted on the frame;
A control unit for controlling the grouting unit to output control and grouting information;
And a main test section installed in the frame and injecting water into a grouting hole in the ground to test the ground,
The grouting unit includes a hopper for feeding the grazing material, a mixer for mixing the grouting material supplied from the hopper, an agitator for agitating the grout material mixed by the mixer, a grouting pump for agitating the grout material agitated by the agitator, A valve for controlling a pressure feed amount of the grout material pumped by the grouting pump, a meter for measuring a flow rate and a pressure of the grout material pumped by the grouting pump, a grout material pumped by the grouting pump to be grouted Grouting hose,
Wherein the main test section includes a main test section mounted on the frame and before the grouting test for main test, the main test section includes a water tank for storing water for the main test, a main test pump for injecting the water stored in the water tank into the ground, / RTI >
Wherein the grouting pump includes a pressurization pipe for pressurizing the grout material and provided with the valve and the measuring device, and the main test pump of the main water testing unit is connected to the pressure transfer pipe through a switching valve, And the grouting is performed through the grouting portion after the ground is tested through the casting test portion. [2] The frame according to claim 1, wherein the frame has a structure in which an opening portion having one or more open sides is formed in the peripheral portion and the remaining portion is closed, and a lid for opening and closing the opening portion is provided in the opening portion of the frame, Wherein the lower shelf is a combination of an upper cover and a lower shelf, the lower shelf being combined with a cover to provide a working space. delete A first step of moving the mobile integrated grouting equipment according to claim 1 to a grouting construction site;
The grouting hose of the mobile type integrated grouting equipment is inserted into a grouting hole formed in the ground, water is injected into the grouting hole through a main test portion, and the grout material is tested by selecting the grout material and the injection pressure is calculated A second step;
A third step of activating the grouting part of the mobile type integrated grouting equipment and injecting the selected grout material through the second step into the grouting hole at the calculated injection pressure and grouting;
And a fourth step of finishing grouting or controlling injection of grouting after completion of grouting in the third step. The mobile integrated grouting method according to claim 4, wherein the second step is to calculate an injection pressure at a maximum injection pressure of 60 kg / cm ² , a maximum injection rate of 100 l / min and a minimum injection rate of 10 l / min.

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