KR101949086B1 - Self reliance pile and Self reliance retaining wall construction method using the same - Google Patents

Abstract

The present invention relates to a self-sustaining thumb pile and a method for building a self-sustaining earth retaining wall by using the self-sustaining thumb pile for allowing a thumb pile to be self-sustained by tension of a tensile material, in which it is possible to improve buildability as the settling end on the upper side of the tensile material can be adjusted in height even when there is a difference in insertion depth of the thumb pile. The self-sustaining thumb pile according to a preferred embodiment of the present invention includes a lower pile made of H-shaped steel; an upper pile made of an H-shaped steel and rigidly connected to the upper end of the lower pile and having an elongated through-hole and a fastening guide slot formed in the upper part; a tensile material cradle mounted on the upper pile to be slidable up and down along a cradle guide slot; a threaded steel bar for cradle positioning adjustment supported on the upper pile and screwed to the tie rod so as to adjust the height of the tie rod on the rotating operation direction; at least one locking nut screwed into the threaded steel rod for fixing the cradle to fix a height-adjusted position of the cradle-fixing member; and a tension member for self-standing of the pile which is fixed at the lower end side of the lower pile at one end with the other end tied to the tie rod through the tie rod through hole and then settled by tensioning on the tie rod side through the guide long hole of the tied rod of the tensile material.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a self-sustaining thumb pile and a self-

The present invention relates to a self-sustaining thumb pile and a method of constructing the self-supporting type earth retaining wall using the self-sustaining thumb pile. More particularly, although the thumb pile is self-supported by the tension of the tension member, The present invention relates to a self-supporting thumb pile and a self-supporting type earth retaining wall using the same.

The known self-standing earth retaining method is a method of reducing the bending moment generated by the earth pressure by applying a tensile force after installing a steel bar or a steel wire on the pile. This method has advantages such that the installation process of the supporting material is omitted and smooth excavation work is performed as compared with the other sand retaining method, thereby shortening the construction time and reducing the construction cost.

In this method, since the wedge is not used, even if the depth of penetration of the pile is different, there is no problem in the construction. However, it is difficult to fix the upper end of the steel wire to the wrist strap when the wrist straps are connected to each other by a wrist strap in order to prevent the piles which are under construction from moving independently. That is, if the penetration depths of the piles are different from each other, the upper and lower elevations of the steel wire become different from each other, so that it becomes difficult to fix the steel wire at the same height position of the belt. Therefore, there is a need for a method of adjusting the fixing position of the upper end of the steel wire to the same height even if the penetration depths of the piles are different from each other.

As a background of the present invention, Korean Patent Registration No. 10-1609805, 'Thumb pile incorporating a prestress and a self-supporting type permanent earth retaining method using the same' has been proposed. This is because a thumb pile is first introduced by introducing a prestress into a certain length of the rear portion of the H beam, the ground is pierced by a near-ground position where the excavation bottom surface inclined portion can be sufficiently fixed, a thumb pile is inserted into the perforation hole, , The required compressive force is ensured by introducing the prestresses at the second stage, and the back soil pressure, which gradually increases during the excavation of the excavation surface, is supported by the prestressed thrust pile and can be self-sustained. .

However, in the background art, there is no means for integrating the thumb piles with each other, so that individual behaviors can be generated. In addition, when the penetration depths of the thumb piles are different from each other, the introduction positions of the prestress are also different from each other, so that there is a problem that the distribution of the compressive resistance is uneven.

As another background art of the present invention, Korean Patent Registration No. 10-1729117 proposes a 'self-supporting type permanent earth retaining construction method using a prestressed stiff pile and strut'. This makes it possible to form a thumb pile by first applying a prestress to a predetermined length of the front surface of the pile of the pile and to bend the pile into a near position where the pile having the prestress introduced therein can be sufficiently fixed to the bottom of the bottom of the pile, After a shallow excavation of the ground in the first stage, a welt and a strut are installed at the top of the pile of the thumb, a required compressive force is secured by applying a second prestress to the thumb pile, and the back earth pressure, To receive the thumb peg introduced. However, this background technique requires a process of tensile and tensile loading of the tensile material several times while installing a bracket on the thumb pile at each excavation step, and construction work becomes troublesome.

Korean Patent Registration No. 10-1609805 Korean Patent Registration No. 10-1729117

The present invention relates to a self-sustaining thumb pile for allowing a thumb pile to be self-sustained by tension of a tensile material, and to improve the workability by adjusting the height of the upper side fixture of the tensile material even if there is a difference in the depth of insertion of the thumb pile. And an object of the present invention is to provide a method of constructing an earth retaining wall.

The self-supporting thumb pile according to a preferred embodiment of the present invention comprises: a lower pile made of H-shaped steel; An upper pile which is made of an H-shaped steel and which is rigidly connected to the upper end of the lower pile, and has an elongated through-hole and a fastening guide slot formed in the upper part; A tongue cradle mounted on the upper pile to be slidable up and down along a cradle guide slot; A threaded steel bar supported by the upper pile and screwed to the tie rod so as to adjust the height of the tie rod in accordance with the rotation direction; At least one locking nut screwed into the threaded steel rod for fixing the cradle to fix a height-adjusted position of the cradle-fixing member; And a tension member for self-standing of the pile which is fixed at the lower end side of the lower pile and the other end through the elongated member through the elongated member through the elongated member, .

Further, the self-supporting type thimbles are characterized in that the vertical section is disposed outside the earth-side flange so that the self-supporting thumb pillars can greatly resist the earthquake earth pressure.

In addition, the tensile material fastening bar has a guide groove having a constant radius of curvature and changing the direction of placement of the tension material for self-standing of the pile, a guide projection slidably coupled to the tension member through hole or the fastening guide guide slot, And a lower position adjusting plate.

Further, the upper pile is provided with a screw reinforcement support plate for supporting the screw rod for adjusting the position of the fastening bar.

According to another aspect of the present invention, there is provided a method for constructing a self-supporting type earth retaining wall using a self-supporting thumb pile, the method comprising the steps of: (a) perforating each self-supporting thumb pile to be installed on the ground; (b) approximating a self-supporting thumb pile to a perforated hole; (c) filling the perforated hole into which the self-supporting thumb pawl is inserted with soil or sand; (d) carrying out a first stage excavation on the planned ground for the installation of the belt and the tensioning of the ties for self-standing piles; (e) manipulating the threaded steel rod for adjusting the position of the cushioning pad in the self-supporting thumb pile so as to align all of the top positions of the tensions for self-standing pile by adjusting the height of the cushioning cushion; and (f) A step of setting the pendulum to stand on the thumb pile and pulling the pendulum standing tension material to fix it on the wale; (g) installing the soil plate between the self-supporting thumb piles and excavating the excavated soil to the intended depth of the ground.

In addition, according to another embodiment of the present invention, a method for constructing a self-supporting type earth retaining wall using a self-supporting thumb pile is characterized in that (a) after perforating the post- Closing the thumb pile; (b) filling soil or sand into the perforation hole into which the self-supporting thumb pail of the following row is inserted; (c) drilling a pile at a position of the heat-transfer pile located at a distance from the perforation hole of the subsequent row to the area to be excavated, and then approximating the heat-induced pile to the heat-transferring perforation hole; (d) filling soil or sand into the perforation hole into which the thumb pile of the heat transfer type is inserted; (e) operating the screw rod of the self-supporting thumb pile in the rear row so as to adjust the height of the tension member to adjust the position of the upper portion of the tension member for the self-supporting pile to the same height; (f) Afterwards, a wrist band of the rear row is placed on the upper end of the upper end of the self-supporting thumb pile, and a connecting steel pipe is installed between the wrist band of the rear row and the self- Thereby inserting the inside of the connecting steel pipe; (g) placing a wristband of the heat conduction after the first excavation on the thumb pile of the heat train, and tensioning the prestressing material for piling to fix it on the wristband of the heat conduction; (h) excavating the soil plate to the excavation depth of the planned soil while installing the soil plate between the heat pile piles.

According to the self-sustaining thumb pile of the present invention and the self-supporting type earth retaining wall using the self-supporting type piling wall, the self-supporting thumb pile can be installed independently by the tensile force of the tension member, , It is easy to excavate and economic construction is possible.

In particular, even if there is a difference in the depth of penetration during the construction of the self-supporting thumb pile, the elevation height of the tie rod can be adjusted by adjusting the height of the upper side fixture of the tie. Therefore, since the upper side fixing positions of the self-supporting thumb pile side tensions can all be set at the same height, it is easy to install the self-supporting thumb piles in order to integrate the self-supporting thumb piles with each other even if the self- , And the self-supporting thumb piles are interconnected by the tie straps so that they can effectively resist the back earth pressure integrally.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
1 is a perspective view of a self-supporting thumb pile according to an embodiment of the present invention.
Figure 2 is a side view of Figure 1;
FIG. 3 is an upper perspective view of the self-supporting thumb pile shown in FIG. 1 viewed from another angle; FIG.
4 is an exploded perspective view of the self-supporting thumb pile shown in Fig.
5A and 5B are a perspective view and a front cross-sectional view showing one embodiment of a tension member mounting bracket applied to the self-supporting thumb pile of the present invention.
FIG. 6 is a partial perspective view of a single row self-supporting thumb pile according to the present invention, in which a belt strip is installed.
7 is a partial perspective view of a two-row self-supporting thumb pile according to the present invention, in which a belt strip is installed.
FIGS. 8 to 13B are flowcharts showing a method of constructing a single-row self-supporting type earth mooring wall according to an embodiment of the present invention.
14 to 18 are flowcharts of a method of constructing two rows of self-supporting earthwalls according to another embodiment of the present invention.
19 is a view showing a state in which a step (h) is formed between a self-sustaining thumb pile 10 of a rear row and a thumb pile 10a of a heat row during the construction of two rows of self supporting type earth retaining walls according to another embodiment of the present invention Degree.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

First, a self-supporting thumb pile 10 installed for installing one or two self-supporting earth retaining walls will be described.

As shown in FIGS. 1 to 4, the self-supporting thumb pile 10 includes a lower pile 12, an upper pile 11, a tie-rod cage 13, a screw rod 14, Nuts 15 and tension members 16 and 16 for self-standing of the pile.

The lower pile (12) and the upper pile (11) are made of the same H-shaped steel material and are rigidly joined to each other. Therefore, the lower pile 12 and the upper pile 11 have the earth side flange 101, the excavation side flange 102, and the web 103. The lower pile 12 and the upper pile 11 may be made the same length or the lower pile 12 may be made longer than the upper pile 11. [ The lower pile 12 and the upper pile 11 are positioned such that the flange joint plate 19a and the web joint plate 19b are positioned on the joint surfaces of the lower pile 12 and the upper pile 11, They can be interconnected by combining them with a nut. Although not shown, one or more intermediate piles may be installed between the lower pile 12 and the upper pile 11 through the same coupling means.

On the other hand, the upper pile 11 is provided at its upper portion with an elongated passage 101a, 101a and a claw guide long hole 102a, 102a. The tensile material penetration holes 101a and 101a are formed in the earth pressure side flange 101 and the claw guide long holes 102a and 102a are formed in the excavation side flange 102. [ Here, the earth-side flange 101 is a portion receiving the earth pressure with respect to the earth retaining wall, and the excavation-side flange 102 is a portion located on the excavation region side.

The tie-rod cages 13, 13 are installed symmetrically with the web 103 on top of the upper pile 11. [ The tensile rigid supports 13 and 13 are installed so as to be slidable up and down along the rigid guide slots 102a and 102a formed in the upper pile 11. [ The tensile cushioning bases 13 and 13 are provided to determine the position of the upper end of the pile self-standing tension members 16 and 16, that is, the upper end fixation position. When the tensile cushioning bases 13 and 13 descend, the upper end portions of the tentative self-standing tension members 16 and 16 descend. When the tensile cushioning bases 13 and 13 rise, The position is also increased.

5a and 5b, the tie-rod cradle 13 has a guide groove 131 having a constant radius of curvature R and changing the arrangement direction of the tie-rod for self-standing of the pile 16, The upper and lower position control plates 133 and 134 formed with the guide protrusions 132 slidably movably coupled to the guide guide elongated holes 102a and the holes 133a and 134a through which the screw rods 14 for adjusting the position of the claws are inserted, Respectively. The taut caddy 13,13 is thus formed by the guiding projections 132 to allow the tie material through holes 101a or the caddy guide elongate 102a along the tie material through holes 101a or caddy guide long holes 102a Lt; / RTI > may have up and down movements within the section.

The threaded steel rods (14, 14) for adjusting the cradle position are installed to adjust the height of the caddy cradles (13, 13). The fastening rod position adjusting screw rods (14, 14) are supported by a screw rod supporting plate (19) provided on the upper pile (11). Also, the threaded steel rods 14, 14 for adjusting the cradle position can be screwed to the tension cadders 13, 13, respectively. Accordingly, the height position of the tension member cradle 13 can be adjusted to the upper direction (U) or the lower direction (D) according to the rotating operation direction of the screw rods (14, 14) for adjusting the cradle position. On the other hand, the screw rods (14, 14) for adjusting the cradle position can be fixed to the cradle holders (13, 13) by means of nuts. In this case, it is possible to adjust the height of the tension member cradle (13, 13) by rotating the fixing nut (15) screwed to the screw rod (14, 14) for adjusting the cradle position.

The fixing nut (15) is screwed on the upper part of the screw rod (14) for fixing the seat to fix the height-adjusted position of the seat fastener (13). Of course, the height of the tension member cradle 13 may be adjusted according to the direction of rotation of the fixing nut 15.

The pendulum self-standing tension members 16 and 16 are fixed to the lower end side of the lower pile 12 and the other end passes through the tongue through holes 101a and 101a and is fastened to the tension member cushions 13 and 13, And is tightly fixed to the side of the wristband 20 or 20a, as shown in Figs. 6 and 7, through the tightening material fastening guide long holes 102a and 102a. In this case, as shown in FIG. 2, it is preferable that the vertical sections are disposed outside the earth-side flange 101 so that the self-supporting thumb pile 10 can resist the earthquake earth pressure as shown in FIG. Therefore, according to the height adjustment of the tie-rod supports 13 and 13, the upper end fixing stumps of the pendulum tilting tangs 16 and 16 can be moved in the upper direction U or the lower direction D.

The lower ends of the tension members 16 and 16 for pawl self-standing are fixed to the lower fixing plate 17 provided at the lower end of the lower pile 12 through the lower fixing hole 18. The lower fixture 18 is comprised of a known wedge housing and a split wedge that is assembled to the wedge housing to engage the tensions. The pendulum self-standing tension members 16, 16 may be a PC stranded wire, a PC steel wire, and the like.

The construction method of the self-supporting type self-supporting earth retaining wall using the self-supporting thumb pile 10 constructed as described above will be described sequentially.

First, as shown in FIG. 8, perforation is performed for each installation position of the self-supporting thumb pile 10 on the ground 5 on which the retaining walls are planned. The perforation can be made through the perforator (200). Here, the perforations are formed at regular intervals so that the perforation holes 5a are arranged in one row.

Then, the self-supporting thumb pile 10 is inserted into the perforated hole 5a as shown in Fig. This can be accomplished by lifting the self-supporting thumb pile 10 with the crane 300 and inserting it into the perforation hole 5a.

Then, as shown in FIG. 10, the perforation hole 5a into which the self-sustaining thumb pile 10 is inserted is filled with gravel or sand. When the perforation hole 5a is filled with the gravel or sand, the gap between the self-supporting thumb pile 10 and the perforation hole 5a is lost.

Then, as shown in Fig. 11, one stage excavation is carried out on the ground 5 planned for the installation of the wale band 20 and the tensioning of the tension members 16, 16 for piling self-standing. Excavator 400 may be used for excavation.

Then, as shown in FIG. 2, each of the self-supporting thumb piles 10 is operated with the screw rods 14 and 14 for adjusting the rod position to adjust the height of the rods 14, So as to have the same height.

In this way, since the upper placing position of the pendulum standing tension members 16 and 16 can be matched, the wale band 20 to be installed afterwards can be installed horizontally even if the self-supporting pendulum 10 is inserted at a different position. That is, if the height of the tie-rod cushion 13 is adjusted, the upper end side fixing positions of all the pendulum tilting tongues 16, 16 can be at the same height, The wrist strap 20 can be installed horizontally and quickly.

Then, as shown in FIGS. 6 and 12, the wale band 20 is installed on the self-supporting thumb pile 10, and the pile self-standing tension members 16 and 16 are pulled and fixed to the wale band 20.

At this stage, the tensioning of the pendulous self-standing tension members 16, 16 can be accomplished using a hydraulic jack not shown. When a tensile force is applied to the pendulum self-standing tension members 16 and 16, a bending moment is introduced to the back side of the self-supporting thumb pile 10 receiving the earth pressure, thereby exhibiting a resistance force to support the earth retaining back surface.

In addition, since the wale band 20 is integrally formed by mutually connecting the self-supporting thumb piles 10 installed in a single row, the self-supporting thumb piles 10 can exhibit resistance effectively on the back of the earth retaining film due to limited individual behavior.

Then, as shown in FIGS. 13A and 13B, the soil plate 50 is installed between the self-supporting thumb piles 20 and excavated to the intended depth of the ground 5, thereby constructing the self-supporting type single-walled wall.

In the case of the single row self supporting type earth retaining wall constructed as described above, the bending moment acting on the back surface of the self-supporting thumb pile 10 is introduced and thus the displacement of the back ground can be more effectively suppressed. Further, even if the self-supporting thumb piles 10 are inserted at different positions during construction, the position of the tie-rod cushions 13, 13 is moved by operating the screw rods 14, 14 for adjusting the tie- And 16 can be adjusted to be coincident with each other, thereby providing an advantage that the workability is improved.

On the other hand, the construction method of the self-supporting two-column type earth retaining wall using the self-supporting thumb pile 10 will be described in order. In the following, the equipment used for the near or excavation uses the above-mentioned crane and excavator.

First, as shown in FIG. 14, a self-sustaining thumb pile 10 of a rear row is inserted into a perforation hole 5a of a rear row formed by drilling a posterior pile position B of a ground 5 on which a retaining wall is planned, Holes 5a are formed in the heat transfer pile position F spaced a certain distance from the drilling hole 5a in the succeeding row to the drilling hole 5a in the drilling hole 5a into which the thumb pile 10 is inserted, ).

Thereafter, as shown in FIG. 15, the heat-transferring thundering pile 10a is inserted into the heat-transferring perforation hole 5a '. The heat-induced thumb pile 10a is made of the illustrated H steel beam, and at least two or more of them are rigidly connected.

Then, as shown in Fig. 15, the perforation hole 5a 'into which the thumb pile 10a with the heat is inserted is filled with gravel or sand.

Next, as in the case of the one-column construction method, the elevation adjustment of the tension member cradle (13) is performed by operating the screw rods (14, 14) for adjusting the cradle position in the independent self- And the upper positions of the tentative materials 16, 16 for piling self-standing are made to coincide with each other at the same height. Thus, even if the submerged thumb piles 10 of the subsequent row are different from each other, the upper fixation positions of the tension members 16 and 16 can be set at the same height.

Next, as shown in Fig. 7, a wristband 20 of the rear row is arranged on the entire upper end of the self-sustaining thumb pile 10 of the rear row, and a wrist strap 20 is connected between the wrist strap 20 of the rear row and the self- After the steel pipe 30 is installed, the upper ends of the tension members 16, 16 for piling self-standing are passed through the wale 20 to allow the inside of the connecting steel pipe 30 to pass therethrough. Since the upper fixation positions of the pendulum treading tension members 16 and 16 are all set to the same position in the previous step, the upper ends of the tension members 16 and 16 for self-standing piles are attached to the wale band 20 and the connecting steel pipe 30 It can be inserted easily.

Then, after the primary excavation as shown in Fig. 16, the wale band 20a of the heat train is installed on the front surface of the thumb pile 10a of the heat transfer, and as shown in Figs. 16 and 17, Is tensioned and fixed to the wristband 20a of the heat conduction.

Then, the soil plate 50 shown in FIG. 13B is installed between the heat-exchanged thumb piles 10a and excavated to the depth of excavation of the designed ground 5 as shown in FIG. 18 to complete the construction of the two-row self-standing earth retaining wall .

In the case of the two-row self-standing earth retaining wall constructed as described above, a bending moment acting as a back surface is introduced to the self-sustaining thumb pile 10 of the rear row to the rear of the heat-induced thumb pile 10a to further suppress the displacement of the back ground . Therefore, if there is a lot of land on the back and depth of excavation is deep, a two row self-supporting type earth retaining wall can be constructed. In addition, even if the self-supporting thumb piles 10 of the subsequent row are different from each other, the positions of the tension members 13, 13 are moved by the operation of the screw rods 14, The height of the upper fixing stage of the first and second fixing members 16 and 16 can be adjusted to be coincident with each other, thereby improving the workability.

As shown in FIG. 19, after the self-supporting type pile 10 of the second row is installed during the construction of the self supporting type earth retaining wall 10, h, the excavation can be preceded by a step difference on the front surface of the self-sustaining thumb pile 10 of the succeeding row. Therefore, when the step is performed so as to have a step (h) between the self-sustaining thumb pile 10 and the heat-driven thumb pile 10a, the height of the upper side fixation step of the self-supporting tension members 16, 16 becomes lower than the ground surface, It is possible to cope with the suppression efficiently.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

10: Self-supporting thumb peg
11: Lower pile
12: Upper pile
13: Tensile Strap
131: Guide groove
132: guide projection
133, 134: upper and lower position control plate
14: Screw thread
15: Fixing nut
16: Tension material for self-standing of pile
19: Screws
20: Wale
30: Connection steel pipe
50: Circulation plate

Claims (7)

delete delete A self-supporting thumb pile (10) for installing a self-supporting type earth retaining wall,
A lower pile 12 made of H-shaped steel;
An upper pile 11 made of an H-shaped steel material and rigidly joined to the upper end of the lower pile 12 and having upper and lower tongue material through holes 101a and 101a and claw bar guide holes 102a and 102a;
A tension member cradle (13, 13) arranged on the upper pile (11) so as to be slidable up and down along the cradle guide long holes (102a, 102a);
A plurality of threaded steel rods 14, 14 which are supported on the upper pile 11 and at the same time threadedly coupled to the tensioner cushions 13, 13 to adjust the height of the tension cushion cushion 13 according to the rotation direction )and;
One or more locking nuts (15) screwed into the threaded steel rods (14) for fixing the cradle to fix the elevated position of the cradle (13);
102a of the tension member fastening piece after one end thereof is fixed to the lower end side of the lower pile 12 and the other end thereof is fastened to the tension member fastening bases 13, 13 after passing through the tension member passing holes 101a, 101a, And tensioned self-standing tensions (16, 16) that are pulled and fixed to the wale band (20) side;
The tension member cradle 13 has a guide groove 131 having a constant radius of curvature R and changing the direction of placement of the tension member 16 for pawl autonomy and a guide groove 131 sliding on the tension member passing hole 101a or the cradle guide long hole 102a And upper and lower position adjusting plates (133, 134) for inserting the guide projections (132) movably coupled and the screw rods (14) for adjusting the position of the cradle. The method of claim 3,
Characterized in that the upper pile (11) is provided with a screw-thread-clamping support plate (19) for supporting the screw rod (14) for adjusting the position of the claw. A method of constructing a self-supporting earth retaining wall using self-supporting thumb pile (10) according to any one of claims 3 and 4,
(a) performing a perforation for each installation position of a self-supporting thumb pile (10) to be installed on a ground (5) where a retaining wall is planned;
(b) approximating the self-supporting thumb pile (10) to the perforated hole (5a);
(c) filling the perforated hole 5a into which the self-supporting thumb pile 10 is inserted with soil or sand;
(d) performing a first stage excavation on the ground (5) intended for the installation of the wale band (20) and the tensioning of the tension members (16,16) for self-standing of the pile;
(e) By manipulating the threaded steel rods 14, 14 for adjusting the seat cushion position in the self-supporting thumb pile 10, the height position of the tension members 16, 16 for self- To the same height,
(f) installing a wale band (20) on a self-supporting thumb pile (10) and tensioning the tension members (16,16) for self-standing of the pile to fix it on the wale band (20);
(g) installing the soil plate (50) between the self-supporting thumb pile (20) and excavating it to the intended depth of the ground (5). The self- Construction method of earth retaining wall. A method of constructing a self-supporting earth retaining wall using self-supporting thumb pile (10) according to any one of claims 3 and 4,
(a) drilling at the post-heat pile position (B) of the ground (5) where the earth retaining slab is planned, and then approximating the self-sustaining thumb pile (10) of the rear row to the perforation hole (5a) of the rear row;
(b) filling gravel or sand into the perforation hole 5a into which the self-sustaining thumb pile 10 of the subsequent row is inserted;
(c) punching the heat-transfer pile position F away from the drilled hole 5a of the succeeding row to a region to be drilled by a certain distance and then approximating the heat-transferred thumb pile 10a to the heat-transferring perforation hole 5a 'Wow;
(d) filling the perforation hole 5a 'into which the thumb pile 10a with the heat is inserted, with gravel or sand;
(e) By manipulating the threaded steel rods 14 and 14 for adjusting the position of the cradle 10 in the self-sustaining thumb pile 10 of the rear row, the upper end of the tension members 16 and 16 for self- Aligning the positions to the same height;
(f) A wristwatch 20 of the rear row is disposed on the entire upper end of the self-supporting thumb pile 10 of the rear row, and a connecting steel pipe 30 is provided between the wristwatch 20 of the rear row and the self- The upper end of the tentative self-standing tension members 16, 16 is passed through the wale 20 to allow the inside of the connecting steel pipe 30 to pass therethrough;
(g) placing the wristband 20a of the heat conduction after the first excavation on the heat-driven thumb pile 10a and pulling the prestressing prestressing materials 16 and 16 to fix the wristband 20a on the heat train;
(h) excavating the soil plate (50) to the excavation depth of the planned ground (5) while installing the soil plate (50) between the heat-generating thumb piles (10a) Construction method of earthen wall. The method according to claim 6,
the excavation is preceded by a step on the entire surface of the self-supporting thumb pile 10 of the rear row so as to have a step (h) between the self-supporting thumb pile 10 and the heat-driven thumb pile 10a after the step (b) Construction method of self - supporting earth retaining wall using self - sustaining thumb pile.

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