KR20030004210A - The method of construction (KY-5 Pipejacking and propulsion method) and apparatus for propulsion based on soft and weak layer soil - Google Patents

Abstract

PURPOSE: A pipejacking and propulsion method and apparatus for propulsion based on soft and weak layer soil are provided to restrain the uplift or subsidence of ground to the utmost and to secure the accuracy on ramming a pipeline. CONSTITUTION: The apparatus for propulsion based on soft and weak layer soil comprises a thrust guide pipe(F) for installing a lower footing concrete layer(14), an auxiliary steel pipe(D) connected to the backside of the thrust guide pipe(F) and provided with a built-in directional control device for a thrust guide pipe, a spiral steel pipe(G) installed on the backside of the auxiliary steel pipe(D), a space part(J) for forming a foundation layer by placing gravel concrete(14) on the outer lower part of the auxiliary steel pipe(E) and the spiral steel pipe(G), and an advancer(E) formed on the backside of the spiral steel pipe(G) to move the pipes forward by pressure.

Description

The method of construction (KY-5 Pipejacking and propulsion method) and apparatus for propulsion based on soft and weak layer soil}

The present invention relates to a soft ground indentation propulsion method (KY-5 propulsion method) and a device thereof, which will be described in detail, in order to prevent inequality settling during pipeline propulsion work in the soft ground and to secure the accuracy of the propulsion of the pipeline. The soft ground indentation propulsion method and its device, which are adapted to the geological conditions, are related to the soft ground indentation propulsion method and the device named by the applicant KY-5 propulsion method.

In recent years, the concentration of population and economic centers has accelerated around large cities, and the classification of administrative districts in Korea has become widespread. The necessity of three-dimensional use of underground space is rapidly increasing for various pipelines directly related to economic life such as sewerage, communication, electricity, and city gas.

In the case of domestic, so far. Most of pipeline construction such as sewer, communication, electric power, city gas performed by open construction method. However, the excavation of pipelines by the excavation method in urban areas is not only severe in traffic obstacles, but also the easy opening and excavation of roads due to various civil complaints is being increasingly regulated. In particular, there are strict regulations on the method of excavation and burial widely in roads, busy streets, dense housing and neighboring areas, as well as pipeline construction such as vehicle-only roads, highways, railroads, dikes and river crossings. It is true. In the case of pipeline construction, which is newly constructed due to the increase of underground buried materials, the construction of deep underground underground is required. Due to the change of construction environment, pipeline construction by propulsion drilling method is occupying a lot of market share in Korea.

In this situation, the demand for construction facilities is gradually increasing even in the soft ground where the sedimentation phenomenon of the buried pipe and the inaccuracy of the direction are marked. It is common sense that when the concrete PC pipes are pushed, an uneven settlement of about 25cm occurs in 30 years in soft ground. In this case, there is no problem in the case of the pressurized pipeline, but in the case of the natural downflow pipeline which is frequently used in the sewage collection pipeline, large construction defects and problems may occur in the future, such as backflow phenomenon and sludge accumulation under the pipeline. Can be.

Briefly, the method of embedding a pipe in the soft ground currently used is as follows (see Fig. 1).

In the case of the installation of various pipelines in the soft ground, the settlement of the pipelines occurs due to the softness of the ground. Therefore, rubble, crushed stone, or large gravel is laid at the lower part of the planned pipeline, After the concrete is cured by pouring concrete, the planned pipeline is joined. It is common to install by laying and fixing.

Unlike in the case of pressure pipes such as water pipes, gas pipes, oil pipes, etc., natural downflow pipes such as sewage pipes and sewage pipes are very important, so the level of pipes is very important.管 種 and ground. Depending on the soil conditions, foundation holes are required. The foundation hole of the conduit shall be constructed considering the following matters depending on the type of conduit and the ground or soil conditions. (Sewage facility standard established by Ministry of Environment)

In the case of rigid conduits, rigid conduits such as reinforced concrete or coated steel pipes are based on sand, stone (or gravel), concrete, etc. under the planned conduits. In the case of soft pipes, soft pipes, such as hard vinyl chloride pipes, are based on free sand foundations, and pile foundations are to be installed depending on conditions.

In general, the classification of the foundation hole according to the type of conduit in the conduit construction work in Korea is as follows.

<Division of the ground>

Ground Representative Soil Hard clay Hard clay, reverse mixed soil and reverse mixed Ordinary sat Sand, loam and sand clay Soft soil Silt and organoclay Dramatic soft soil Very light silt and organic soil

<Basics by tube type>

Ground tube bell Hard soil Soft soil Dramatic soft soil Rigid tube Reinforced concrete pipe Paddy timber foundation crusher foundation sand foundation Concrete foundation Pile foundation Reinforced concrete foundation Road pipe Pleasure-dong Wood Crusher Foundation Sand Foundation Crushed Foundation Concrete Foundation Reinforced Concrete Foundation Flexible tube Hard vinyl chloride tube Sand foundation Sand Foundation Bed Geotextile Foundation, Soil Cement Foundation Bed Geosynthetic Foundation, Soil Cement Foundation, Ladder Wood Foundation, Pile Foundation, Concrete + Sand Foundation Doctile Cast Steel Pipe Sand foundation Sand foundation Sand Foundation Ladder Wood Foundation, Concrete + Sand Foundation

Note): In case of embedding in rock, it is to be the basis of structure that can distribute stress evenly.

In particular, in the case of steel pipe pressurized holes in the soft ground, first, the tip of the propulsion pipe is generally lowered (falling) in proportion to the length of the propulsion distance. Ground reinforcement grouting is planned prior to or parallel to the planning line. Second, in general, the propulsion tip is downward, but the propulsion pipe may be upward depending on the physical properties of the clay and clay, which is the case where the soft ground acts as a sponge. . Third, in the case of soft ground under the aquifer, there has been a problem that the propulsion steel pipe is upward due to a sponge phenomenon at the tip of the propulsion pipe.

In order to solve the above problems, in the present invention, when the propulsion work due to the nature of the soft ground with high fluidity of the ground, ground bumps or settlements in the up and down direction often occur, and the occurrence of such phenomenon is suppressed to the maximum, and pipeline propulsion is performed. Technical Solution The present invention provides a soft ground indentation propulsion method (KY-5 propulsion method) and a device for constructing a steel pipe intrusion propulsion device and a foundation layer composed of gravel and concrete at the same time to secure the accuracy of the same. It is a task.

1 is a conventional soft ground detachment type pipe buried process diagram

Figure 2 is a soft ground indentation propulsion device of the present invention (KY-5 propulsion device) overall view

Figure 3 is a front view of the soft ground indentation propulsion tip (A Zone) of the present invention

Figure 4 is a detailed side view of the soft ground indentation propulsion tip (A Zone) of the present invention

Figure 5 is a plan cross-sectional detail view of the soft ground indentation propulsion tip (A Zone) of the present invention

Figure 6 is a detailed view of the back surface of the soft ground indentation propulsion tip (A Zone) of the present invention

7 is a front and rear detailed view of the soft ground indentation propulsion stop (B Zone) and rear end (C Zone) of the present invention;

8 is a detailed plan view of the soft ground indentation propulsion stop (B Zone) of the present invention;

<Explanation of symbols for the main parts of the drawings>

Lead medium pressure jack (1), lead medium pressure jack support wall (2), lead medium pressure jack repellent wall (3), direction correction hydraulic jack support wall (4), direction correction hydraulic jack support wall (5), direction correction hydraulic jack repulsion wall ( 6), nonwoven roll fixing stand (7), nonwoven roll (8), nonwoven fabric (9), up and down control door bulkhead (10), concrete injection chamber (11), concrete injection hole (12), door (13), concrete (14) ), Concrete hydraulic jack (15), concrete hydraulic jack multi-level cylinder (16), movable bulkhead (head bulkhead) (17), leading forward pipe front lower extension (18), nonwoven fabric inlet (19), hydraulic distributor (20), hydraulic Hose 21, reaction wall 22, hydraulic jack 23, cylinder 24, propulsion auxiliary pipe 25, rail 26, hydraulic unit 27, D: auxiliary steel pipe, E; forward device, F : Propulsion lead pipe, G: spiral steel pipe, H: road, I: soft ground (soil), J: space part.

In order to achieve the above object, the present invention is a method for preventing the downward and upward propulsion of the propulsion lead pipes occurring when the pipes are buried in the buried ground and the sedimentation phenomenon occurs when the pipes are pressurized. It has five characteristics such as

First, in the existing soft ground, the gravel-mixed concrete foundation, which is used to prevent inequality settlement when laying pipes, is made simultaneously with pipe propulsion work without re-installation of the ground, reducing construction period, reducing construction cost, and preventing inequality settlement. The construction of the was made.

Second, the nonwoven fabric is automatically placed between the foundations composed of gravel-mixed concrete injected under the propulsion tube, which reduces the propulsion force required for propulsion and facilitates the propulsion work.

Third, in order to secure the space in which the gravel-mixed concrete foundation is injected smoothly, the bottom part of the tip of the propulsion lead pipe was enlarged and manufactured in a trapezoidal shape so that the earth and sand was excavated, and the additional driving force required in this part was between the propulsion lead pipe and the second pipe. It is assisted by a leading heavy duty jack located at. And to correct the direction of propulsion. Ha. Left. A hydraulic jack for right direction correction was installed.

Fourth, the pipe propulsion work and the gravel-mixed concrete foundation injection work allowed one process to be performed in 3m units, and at the same time, the excavation work and excavation work of 3m propulsion amount were carried out so that the propulsion work could be done quickly and economically.

Fifth, the gravel-mixed concrete is injected into the gravel-blended concrete injection chamber, and then it is forced to be cast to a certain height in the opposite direction through the pipe penetration by the hydraulic hydraulic jack and the multi-stage cylinder and the movable bulkhead (head bulkhead) attached thereto. The speed of pushing the movable bulkhead (head bulkhead) of the concrete hydraulic jack was adjusted manually according to the propulsion speed of the leading heavy duty jack.

The present invention can be broadly divided into details.

First, the device shown in Fig. 2 is a 1m tip of the propulsion lead pipe F, the upper part of which is a circular steel pipe and the lower part has a trapezoidal shape made of steel plate (see Fig. 3). Is to secure the injection space of the nonwoven fabric and the gravel compounded concrete to be placed in the lower part of the propulsion pipe in advance, and the soil pushed into this part naturally propels backward along the inclination of the steel plate separating bulkhead installed at the 1m point of the propulsion lead pipe (F). It was allowed to flow into the steel pipe.

Second, the device shown in Figures 4 and 4 to press-pour the non-woven fabric and gravel compounded concrete to the lower part of the propulsion pipe to the rear two concrete hydraulic jack 15, length 3000mm concrete hydraulic jack multi-stage cylinder (16), movable bulkhead (Head bulkhead) (17), gravel mixed concrete injection chamber (11) and injection hole (12), lock door (13), up and down control door bulkhead (10), non-woven roll (8) and the fixed base (7) consist of. First, the upper and lower control door bulkheads 10 installed at the rear portion of the propulsion lead pipe F are lowered to close the space of the concrete injection chamber 11, and then open the door 13 of the concrete injection chamber 11 to open the injection hole. (12) is opened and filled with gravel compounded concrete transported from the ground part in a concrete injection chamber 11 of 3m in length, and then the door 13 is locked, and then the upper and lower control door bulkheads 10 are raised and the auxiliary steel pipe The concrete injection chamber 11 is driven by driving the hydraulic jack 15 and the concrete hydraulic jack multi-stage cylinder 16 in accordance with the propulsion speed of the heavy pressure jacks 1 and 4 attached to (D) and the hydraulic jack 23 of the forward device E. The gravel mixed concrete in the interior was allowed to be poured by pressure behind the propulsion lead pipe (F). In addition, the nonwoven fabric roll 8 installed at the bottom of the propulsion lead pipe F was naturally placed along the interface between the propulsion steel pipe and the gravel composite concrete. Third, the forward heavy pressure jack (1) and auxiliary steel pipe (D), the direction modification hydraulic jack (14) device shown in Figures 2 and 8, the propulsion lead pipe (F) is not a circular pipe, so the existing circular pipe In order to assist the propulsion force required a lot compared to the auxiliary steel pipe (D) on one side (side contacting the spiral steel pipe (G)) was installed the leading heavy pressure jack (1). Ha. Left. Four hydraulic jacks 4 for directional correction were installed on the other side of the auxiliary steel pipe D (side contacting the driving line conduit F) for smooth directional correction of the right side.

Various hydraulic jacks (23), leading heavy-duty jack (1), direction correction hydraulic jack (4) and concrete hydraulic jack (15) used in the present invention is a hydraulic distributor 20 by the hydraulic unit 27 installed in the forwarding device (E) And the hydraulic hose 21 is connected to operate and all the operation is to be adjusted manually and automatically by using the apparatus and method applied in the art, such hydraulic technology and devices are not the gist of the present invention. The description is omitted.

Hereinafter, the present invention will be described in detail with reference to the following Examples.

Example

First Process (First Promotion Process)

As shown in FIG. 2, the hydraulic unit 27 and the hydraulic jack 23 are operated to move the propulsion lead pipe F forward to the soft ground (soil) I, and the propulsion auxiliary pipe 25 is driven by the cylinder 24. ), The pressure is transmitted to the propulsion lead pipe (F), auxiliary steel pipe (D) and spiral steel pipe (G) in front of about 3m forward, and then remove the soil introduced into the propulsion lead pipe (F) ,

2nd process (direction correction process)

When the direction of the propulsion lead pipe (F) constructed in the first step is wrong, the front face toward the spiral steel pipe (G), the rear side is the direction modification repellent wall formed at the rear of the propulsion lead pipe (F) (6) Of the four direction correction hydraulic jacks (4) for correcting the up, down, left, and right directions located at the bottom side by correcting by operating the direction correction hydraulic jack (4) opposite to the direction to be corrected (see Figs. 2 and 8).

The third process (lower foundation part construction)

The upper and lower control door bulkheads 10 installed in the inner middle portion of the propulsion lead pipe F are fixed by extending downward, and then the door 13 of the concrete inlet 12 is opened to move the gravel mixed concrete 14 to the movable partition wall. 17) and the non-woven fabric roll (8) is installed in the nonwoven fabric holder (7) provided in the rear portion after the injection into the concrete injection chamber 11 formed between the upper and lower control door partition (10), one end of the nonwoven fabric roll (8) To the nonwoven fabric inlet 19, and then (see Figures 4 and 5)

When the concrete hydraulic jack 15 installed in front of the movable bulkhead 17 is operated, the concrete hydraulic jack multi-stage cylinder 16 connected to the concrete hydraulic jack 15 is operated to push the movable bulkhead 17 backwards to the concrete. As the concrete 14 injected into the injection chamber 11 is pushed backwards, the upper and lower control door bulkheads 10 are moved upward so that the space portion formed under the auxiliary steel pipe D and the spiral steel pipe G formed at the rear. (J) the concrete (14) is pushed together with the nonwoven fabric (9) introduced into the nonwoven fabric inlet 19 and pushed together with the concrete (14) into the space (J), the auxiliary steel pipe (D) and spiral steel pipe ( A non-woven fabric 9 is positioned between the lower portion of G) and the concrete 14 filled in the space portion J so that the base layer is formed (see FIGS. 6 and 7) to form the auxiliary steel pipes D and spirals formed thereon. The secondary steel pipe (D) by stably fixing the steel pipe (G) ) And minimizing the resistance during the forward propulsion of spiral steel pipe (G),

4th process (2nd promotion process)

Operate a plurality of leading heavy pressure jack (1) to propel the propulsion lead pipe (F) installed in front of the leading medium pressure jack (1), at this time to remove the soft soil coming in from the ground of the propulsion lead portion,

It is a soft ground press-injection propulsion method (KY-5 propulsion method) that is repeatedly excavated according to the process sequence to construct a certain distance.

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

Figure 1 is a conventional soft-based indentation propulsion process, Figure 2 is a general view of the soft ground indentation propulsion device (KY-5 vibration system) of the present invention, Figure 3 is a front view of the soft ground indentation propulsion tip (A Zone) of the present invention Figure 4 is a detailed side view of the soft ground indentation propulsion tip (A Zone) of the present invention, Figure 5 is a plan cross-sectional detail view of the soft ground indentation propulsion tip (A Zone) of the present invention, Figure 6 is a soft ground indentation of the present invention Detailed view of the propulsion front end (A Zone), Figure 7 is a front and rear detailed view of the soft ground press-in pushing propulsion stop (B Zone) and the rear end (C Zone) of the present invention, Figure 8 is a soft ground press-in propulsion of the present invention The top view of the stop zone (B Zone) is shown, and the leading medium pressure jack (1), the leading medium pressure jack support wall (2), the leading medium pressure jack repellent wall (3), the hydraulic jack for direction correction (4), and the direction correction Hydraulic Jack Support Wall (5), Directional Hydraulic Jack Repulsion Wall (6), Nonwoven Roll Fixture (7), Nonwoven Roll (8), Nonwoven Fabric (9), Up and Down Control Door Bulkhead (10), Concrete Column Seal 11, concrete inlet 12, door 13, concrete 14, concrete hydraulic jack 15, concrete hydraulic jack multi-stage cylinder 16, movable bulkhead (head bulkhead) (17), front lower propulsion pipe Expansion unit 18, nonwoven fabric inlet 19, hydraulic distributor 20, hydraulic hose 21, reaction force wall 22, hydraulic jack 23, cylinder 24, propulsion auxiliary pipe 25, rail 26 ), Hydraulic unit (27), D: auxiliary steel pipe, E; forwarding device, F: propulsion lead pipe (No. 1), G: spiral steel pipe (No. 2), H: road, I: soft ground, J: space part It can be seen that.

Referring to the structure, as shown in Figure 2, the propulsion diagram composed of a device for installing a lower layer of concrete 14, in order to press the steel pipe into the soft ground (soil) (I) under the road (H) The auxiliary steel pipe (D) and the auxiliary steel pipe (D), which is connected to the rear of the propulsion lead pipe (F), and which has a device for advancing and modifying the propulsion lead pipe (F), and the auxiliary steel pipe (D). Spiral steel pipe (G) is installed on the rear of the auxiliary steel pipe (D) and the outer lower portion of the spiral steel pipe (G) gravel concrete (14) is installed to form a base layer and the spiral steel pipe, the spiral steel pipe Formed on the rear of (G) is a soft ground indentation propulsion device (KY-5 propulsion device) consisting of a forwarding device (E) for advancing the pipes by forward pressure,

In more detail,

As shown in FIG. 2, the forward device E is installed on the rear side of the spiral steel pipe G and the upper portion of the rail 26 to advance the steel pipes by force.

Reaction wall 22 is installed on the rear, and the front of the reaction wall 22, the hydraulic jack 23 is connected to the hydraulic unit 27 by the hydraulic hose 21 and connected to the hydraulic jack 23 Propulsion auxiliary pipe 25 in close contact with the cylinder 24 and the front of the cylinder 24 to protect the spiral steel pipe (G), and in close contact with the rear of the spiral steel pipe (G) in front of the propulsion auxiliary pipe (25). Is configured to

As shown in Figures 2 and 8, the auxiliary steel pipe (D) is formed between the spiral steel pipe (G), the leading propulsion pipe (F), the rear side is directed toward the spiral steel pipe (G),

Four directional correction hydraulic jacks (4) for modifying the direction of up, down, left, and right and installed at the rear of the direction modification hydraulic jack repelling wall (6) formed at the rear of the propulsion lead pipe (F), and the directional correction hydraulic jack (4) Is formed at the end of the), and the direction correction jack support wall (5) protruding in the form of a band on the middle inner edge, the leading medium pressure jack repulsion wall (3) installed on the inner rear border, and the leading medium pressure jack repulsion wall (3) A space in which a plurality of lead medium pressure jacks 1 installed on the front of the head), a lead medium pressure jack support wall 2, and a concrete layer 14 formed on the outer lower part are formed on the front of the lead medium pressure jack 1 It consists of part (J),

As shown in Figures 2 to 5, the propulsion lead pipe (F) is installed on the front of the auxiliary steel pipe (D), the upper portion of the front portion (see Figure 3) is a circular steel pipe and the lower portion of the steel plate The trapezoidal shape of the forward propulsion pipe front lower extension part 18 is formed, and the middle part and the rear part have a circular tubular shape.

Concrete inlet 12 for injecting concrete into the concrete injection chamber 11 installed in the lower outer middle portion, the door 13 to be opened and closed up and down in the concrete inlet 12 and the rear of the concrete inlet 12 Up and down adjustment door bulkhead 10 is installed to extend to the outer bottom spaced apart, the non-woven fabric inlet 19 for injecting the nonwoven fabric 9 into the lower side of the rear, and the non-woven roll fixing unit installed in the rear of the nonwoven fabric inlet 19 ( 7) and the nonwoven roll 8 provided in the nonwoven roll fixing stand 7 (see FIGS. 4 and 5).

A movable hydraulic partition wall 17 which is moved by the concrete hydraulic jack 15 installed in front of the outer lower part, the concrete hydraulic jack multi-stage cylinder 16 connected to the concrete hydraulic jack 15, and the concrete hydraulic jack multi-stage cylinder 16; It can be seen that it is composed of a concrete injection chamber 11 formed between the movable bulkhead 17 and the up and down control door bulkhead 10 (see Figs. 4 and 5).

The present invention as described above is to reduce the occurrence of inequality settlement during the pipeline propulsion operation in the soft ground and to make the non-woven fabric is automatically placed between the base and the steel pipe consisting of the gravel compounded concrete to reduce the propulsion required during the propulsion, pipe propulsion work and gravel Mixing concrete foundation injection work was carried out in 3m unit for one process and at the same time, excavation work and excavation work of 3m propulsion were carried out, and gravel compounded concrete was injected into gravel compounded concrete injection room, followed by concrete hydraulic jack and multi-stage cylinder The movable bulkhead attached to this force was forced to be placed at a certain height in the opposite direction to the tube propulsion, resulting in uniformity of the foundation layer, and manually adjusting the speed of pushing the movable hydraulic jack of the concrete hydraulic jack according to the propulsion speed of the leading heavy jack. In order to secure the accuracy of pipeline promotion, Korea topography and geological tide It has the advantage that it fits the case and the additional construction cost is low.

Claims (3)

In soft ground indentation and promotion method, First Process (First Promotion Process) The hydraulic unit 27 and the hydraulic jack 23 are operated to move the propulsion lead pipe F forward on the soft foundation (soil) I, and the pressure is applied to the propulsion auxiliary pipe 25 by the cylinder 24. Propagated forward propulsion lead pipe (F), auxiliary steel pipe (D) and spiral steel pipe (G) forward, 2nd process (direction correction process) When the direction of the propulsion lead pipe (F) constructed in the first step is wrong, the front face toward the spiral steel pipe (G), the rear side is the direction modification repellent wall formed at the rear of the propulsion lead pipe (F) (6) Of the four direction correction hydraulic jacks (4) for modifying the up, down, left and right directions located in the) by operating the direction correction hydraulic jack (4) opposite to the direction to be corrected, The third process (lower foundation part construction) The upper and lower control door bulkheads 10 installed in the inner middle part of the propulsion lead pipe F are fixed by extending downward, and then the door 13 of the concrete inlet 12 is opened to install the gravel compounded concrete 14 for foundation laying. After injecting into the concrete injection chamber 11 formed between the movable bulkhead 17 and the upper and lower control door bulkheads 10, the nonwoven fabric roll 8 is installed on the nonwoven fabric fixing base 7 installed at the rear side, and the nonwoven roll 8 One end of the feeder into the nonwoven input opening (19), When the concrete hydraulic jack 15 installed in front of the movable bulkhead 17 is operated, the concrete hydraulic jack multi-stage cylinder 16 connected to the concrete hydraulic jack 15 is operated to push the movable bulkhead 17 backwards to the concrete. As the concrete 14 injected into the injection chamber 11 is pushed backwards, the upper and lower control door bulkheads 10 are moved upward so that the space portion formed under the auxiliary steel pipe D and the spiral steel pipe G formed at the rear. (J) the concrete (14) is pushed together with the nonwoven fabric (9) introduced into the nonwoven fabric inlet 19 and pushed together with the concrete (14) into the space (J), the auxiliary steel pipe (D) and spiral steel pipe ( A secondary steel pipe (D) and a spiral steel pipe formed on the upper portion so that the nonwoven fabric 9 is positioned between the lower portion of G) and the concrete 14 filled in the space portion J to form a base layer (see FIGS. 6 and 7). Hold (G) stable, 4th process (2nd promotion process) Operate a plurality of leading heavy pressure jacks 1 to propel the propulsion lead pipes F installed in front of the leading heavy pressure jacks 1, at this time, to remove the soft soil coming from the ground of the propulsion lead portion, and again in the process sequence. Repeated excavation along the construction of soft ground indentation method (KY-5 propulsion method). In the soft ground indentation propulsion device, a propulsion lead pipe (F) composed of a device for installing a lower concrete (14) layer to press the steel pipe into the soft foundation (soil) (I) under the road (H) and Is connected to the rear of the propulsion lead pipe (F), the auxiliary steel pipe (D) with a device for advancing and modifying the propulsion lead pipe (F), and the spiral installed on the back of the auxiliary steel pipe (D) Steel part (G), the space portion (J) is formed on the outer lower portion of the auxiliary steel pipe (D) and spiral steel pipe (G) to form a foundation layer, Is formed on the back of the spiral steel pipe (G) is composed of a forwarding device (E) for advancing the pipes by forward pressure, The forwarding device (E) is installed on the rear of the spiral steel pipe (G), and the upper portion of the rail 26 to advance the steel pipes by stepping down, Reaction wall 22 is installed on the rear, and the front of the reaction wall 22, the hydraulic jack 23 is connected to the hydraulic unit 27 by the hydraulic hose 21 and connected to the hydraulic jack 23 Propulsion auxiliary pipe 25 in close contact with the cylinder 24 and the front of the cylinder 24 to protect the spiral steel pipe (G), and in close contact with the rear of the spiral steel pipe (G) in front of the propulsion auxiliary pipe (25). Is configured to As shown in Figures 2 and 8, the auxiliary steel pipe (D) is formed between the spiral steel pipe (G), the leading propulsion pipe (F), the rear side is directed toward the spiral steel pipe (G), Four directional correction hydraulic jacks (4) for modifying the direction of up, down, left, and right and installed at the rear of the direction modification hydraulic jack repelling wall (6) formed at the rear of the propulsion lead pipe (F), and the directional correction hydraulic jack (4) Is formed at the end of the), and the directional correction jack support wall (5) protruding in the form of a band on the middle inner rim, the leading medium jack repulsion wall (3) installed on the inner rear border, and the leading medium jack repulsion wall (3) A space in which a plurality of lead medium pressure jacks 1 installed on the front of the head), a lead medium pressure jack support wall 2, and a concrete layer 14 formed on the outer lower part are formed on the front of the lead medium pressure jack 1 Soft ground press-in propulsion unit (KY-5 propulsion unit), characterized in that composed of a (J). The method according to claim 2, wherein the propulsion lead pipe (F) is installed on the front of the auxiliary steel pipe (D), the upper portion of the front portion is a straight line of the straight steel pipe and the lower portion of the trapezoidal shape of the leading propulsion tube front lower extension part made of steel plate It is formed of (18), the middle part and the rear part are circular tubular, Concrete inlet 12 for injecting concrete into the concrete injection chamber 11 installed in the lower outer middle portion, the door 13 to be opened and closed up and down in the concrete inlet 12 and the rear of the concrete inlet 12 Up and down adjustment door bulkhead 10 is installed to extend to the outer bottom spaced apart, the non-woven fabric inlet 19 for injecting the nonwoven fabric 9 into the lower side of the rear, and the non-woven roll fixing unit installed in the rear of the nonwoven fabric inlet 19 ( 7), the nonwoven fabric roll (8) provided in the nonwoven fabric roll holder (7), the concrete hydraulic jack (15) installed in front of the outer lower portion, the concrete hydraulic jack multi-stage cylinder (16) connected to the concrete hydraulic jack (15), The movable hydraulic partition wall 17 is moved by the concrete hydraulic jack multi-stage cylinder 16, and the concrete injection chamber 11 formed between the movable partition wall 17 and the up and down control door partition wall (10) Soft paper Semi indentation propulsion unit (KY-5 propulsion unit).