JPH09158181A - Excavation and sheathing, and sheathing pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce sheet pile cost, perform construction on an appropriately flat surface by curving a sheathing face, reduce vibration and noise, save labor and improve operability. SOLUTION: In excavation and sheathing, a sheathing pile 1 is pushed into a ground 7 at an excavation face. When the head reaches an excavation depth, push is stopped, and the orientation of each L-shape hole 1a is corrected. And then excavation is performed, and when the L-shape holes of side-by-side sheathing piles 1 appear, an L-shape angle 2 is arranged astride between the two L-shape holes 1a. Furthermore, excavation is processed with, when an L-shape angle 2 is arranged astride below the L-shape angle 2, a sheet pile 3 is inserted and fitted between the upper and lower L-shape angles 2. Excavation and the attachment of L-shape angles 2 and sheet piles 3 are proceeded with in sequence to the depth of an excavation bottom 6, and when a sheathing wall 4 and the excavation bottom 6 are built, the work ends.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a root cutting and earth retaining method for constructing roads and drainage channels, burying pipes, building foundation work, etc. The earth retaining wall can be bent at various angles to make a continuous arrangement, and the earth retaining wall can be constructed to have a strong structure.
The present invention relates to a soil retaining method and a soil retaining pile used therefor.

[0002]

2. Description of the Related Art The ground is dug down to construct roads and drainage channels,
For digging (root cutting) and earth stop when burying large diameter pipes or building foundation work, steel sheet piles have been continuously driven into the ground cutting surface position. Rear root cutting method (steel sheet pile method) or drilling (pre-drilling) at the root cutting surface position with earth auger at predetermined intervals, inserting H-shaped steel to be the main pile into each hole, and further cutting the root After hitting deeper than the depth to stabilize (called rooting),
Root cutting along the root cutting surface, and as the root cutting progresses, a sheet pile is sequentially fitted between the exposed H-shaped steel of the root cutting surface from above and backfilling is performed (parent pile side sheet pile construction method, Figure 8
(See) was commonly used. Among these conventional methods, the steel sheet pile construction method can construct a strong earth retaining wall with steel sheet piles, but installation on the root cutting surface of large and heavy steel sheet piles is performed by hammering etc. Has become a large scale, and the workability is poor, and it is difficult to implement in a narrow space. On the other hand, in the parent pile horizontal sheet pile construction method using H-section steel, only the parent pile can be driven, and the work can be carried out more finely, and it can be performed in a relatively narrow place, but each H-shaped parent pile installed at a predetermined interval In order to fit the sheet pile between the adjacent H-section steels, it was necessary for the groove portions of the respective H-section steels to face each other adjacent to each other. Therefore, even if you want to bend the root cut surface at a required angle such as a right angle when viewed in plan, while gradually changing the direction of the H-section steel so that the groove parts face each other so that a sheet pile can be inserted between them. There was no choice but to arrange them so that the root cutting surface was gradually bent (see FIG. 9), and there was a large restriction on the planar layout of the root cutting surface. On the other hand, the sheet piles fitted between the H-section steels are supported on both sides only by the groove portions of the H-section steels, and it is necessary to use thick and sturdy ones in order to sufficiently support earth pressure. It was a disadvantage.

[0003]

The problem to be solved by the present invention is to solve the above-mentioned problems and to secure a sufficient strength against earth pressure even if the strength of the sheet pile itself is lowered. In addition to cost reduction, the soil retaining pile that can set the direction of the hole for inserting the lateral member in multiple ways is used as the main pile, and the root cutting surface is bent at the main pile position to make an appropriate flat layout. Vibration and noise can be reduced by screwing the soil retaining pile into the ground and pressing it into the ground.In addition, pre-digging and earth removal treatment are not required, and it is highly accurate and the orientation can be adjusted easily. Can be put in and has good workability, root cutting
An object is to provide an earth retaining method and an earth retaining pile used for this method.

[0004]

Means for Solving the Problems The constitution of the present invention which has solved the above problems is as follows: 1) Two sets of holes each having a predetermined shape are formed on a side surface of a long cylindrical pile at predetermined peripheral positions and are separated from each other by a predetermined distance in the vertical direction. Plural earth retaining piles with a structure provided are separated by a prescribed distance along the root cutting surface position where the ground is cut, and are driven to the depth of the rooting so that the holes are facing each other. After aligning, perform root cutting along the set root cutting surface, expose both holes facing each other of adjacent soil stopping piles, insert the end of the horizontal member into these exposed holes, and insert between the holes A cross member is installed on the back of the horizontal member to construct a soil stop wall and supports the root cutting surface. 2) The root cutting and earth stopping method is used. Two sets of holes with a specified shape on the side of the pile at a specified circumferential position in the vertical direction In addition to providing a plurality of each with a predetermined interval, and a spiral blade for underground propulsion on the outer periphery of the bottom of the pile, while pushing this soil stop pile against the ground, push it vertically to the insertion depth, The root-cutting and earth-stopping construction method described in 1) above, in which the soil-stopping piles are rotated and aligned so that the holes face each other between the adjacent soil-stopping piles. Make a rectangular shape that is slightly longer than the distance between the holes in the vertical direction and has the right and left dimensions equal to the distance between the soil retaining piles, and cut the roots between the parallel horizontal members installed between the holes of each soil retaining pile. Inserting and inserting a sheet pile from the front side of the surface, and installing it on the back side of the horizontal member. 1) or 2) above-mentioned root cutting and earth retaining method 4) The sheet pile has a vertical dimension equal to the root cutting bottom depth and left and right. The dimensions are different for each soil stopper. 1) or 2 above, which has a vertically long rectangular shape equal to the distance between the piles, and the cross member is installed between the facing holes of the soil retaining piles, and then the sheet pile is pushed from the ground to install it on the back side of the cross member. ) Described in
Earth retaining method 5) The sheet pile is formed into a rectangular shape whose left and right dimensions are slightly shorter than the distance between the soil retaining piles, and a horizontal member is provided on the front side of the sheet pile at the same interval as the vertical hole interval of the soil retaining piles. If a plurality of horizontal members attached to the sheet pile expose the facing holes of the adjacent soil retaining piles, the horizontal members protrude from the sheet pile. Insert the ends of these into these holes and extend them between the holes, and insert an auxiliary sheet pile that closes the gap created between the sheet pile and the soil retaining pile on the back side of the horizontal member, and simultaneously install the sheet pile at the same time as the horizontal member. The root cutting and earth retaining method described in 1) or 2) to be installed. 6) Two sets of holes each having a predetermined shape are provided at a predetermined circumferential position on a side surface of a long tubular pile, and a plurality of sets are provided at predetermined intervals in the vertical direction. Pile for earth retaining structure 7) Long On the side surface of the cylindrical pile, two sets of holes of a predetermined shape were provided at predetermined circumferential positions, separated by a predetermined distance in the vertical direction, and a plurality of holes were provided respectively, and a spiral blade for underground propulsion was provided on the outer periphery of the bottom of the pile. 6) The earth retaining pile according to 6), which has a structure 8) The hole shape is L-shaped, and the L-shapes of the holes are left-right reversed at two circumferential positions.
Or it is in the pile for earth retaining as described in 7).

[0005]

In the root cutting and earth stopping method of the present invention, first, the earth stopping piles are arranged at predetermined intervals at the root cutting surface position of the ground,
Place this on the ground. Each hole of the soil retaining pile faces each corresponding hole of the adjacent soil retaining pile in a state where the soil retaining pile reaches the preset rooting depth. After installing the soil retaining pile, perform root cutting along the set root cutting surface.
When the holes facing each of the adjacent piles for soil stop appear on the surface by the root cutting, the transverse member is successively installed between these holes in such a manner that the end is inserted into each hole. Root cutting surface of each horizontal member between each pile for soil protection A sheet pile that receives the earth pressure of the root cutting surface is installed on the back side when viewed from the front, and the soil retaining pile, horizontal member, and sheet pile are used for soil protection. Build a wall. Since the sheet pile can be supported by a plurality of lateral members that are provided between the soil retaining piles, stress concentration is less compared to the case where it is supported on both sides only, which is advantageous in strength and is a thinner and lighter material. The sheet pile can be used.

In the method of using the soil retaining pile in the form of a cylinder, first, the soil retaining piles are arranged at predetermined intervals at the root cutting surface position of the ground, and the spiral blades are rotated in a direction in which the spiral blade tends to move downward. While pushing it down, push it vertically downward against the ground. The soil retaining pile is guided by the spiral blade and quickly moves into the ground while screwing, and no large noise, vibration, or soil discharge occurs. When the soil retaining pile reaches the preset rooting depth, stop pushing it so that each hole of the soil retaining pile faces the corresponding hole of each adjacent soil retaining pile, that is, each hole is cut. Rotate each soil retaining pile so that it is open parallel to the surface. The soil retaining pile has a columnar shape and can be easily rotated, and the holes can be easily aligned with each other, so that it is not necessary to pull out the soil for alignment. After the soil retaining piles have been installed, root cutting is performed along the set root cutting surface, and the transverse members and the sheet piles are installed between the soil retaining piles in the same manner as described above to construct the soil retaining wall.

In the method of inserting the sheet pile between two adjacent upper and lower horizontal members in parallel and installing it on the back side of the horizontal member, the root cutting is advanced so that the facing holes of the adjacent soil retaining piles are both on the surface. When it appears, a transverse member having the same sectional shape as the hole is successively provided between these holes. After proceeding with root cutting and laying of the horizontal member respectively, if a new horizontal member is laid under the horizontal member already laid between the soil retaining piles,
A rectangular sheet pile whose vertical dimension is slightly longer than the distance between the holes in the vertical direction of the soil retaining pile, that is, the distance between the lateral members, and whose left and right dimensions are equal to the distance between the soil retaining piles. Insert the upper part of the sheet pile deeply between the faces so that the lower part of the sheet pile can pass above the lower lateral member,
Push the entire sheet pile between the upper and lower horizontal members. After that, the entire sheet pile is lowered, the upper portion inserted deeply is returned, and the lower portion of the sheet pile is positioned on the back side of the lower lateral member. The sheet pile is sandwiched between the upper and lower horizontal members and the ground surface, and does not fall off even if the lower part is root-cut. In the same manner as above, if the root cutting, the cross member installation, and the sheet pile installation are sequentially advanced to the preset root cutting bottom depth, the earth retaining wall that supports the root cutting surface is completed.

In the method of pushing the sheet pile from the ground and installing it on the back side of the lateral member, the root cutting and the lateral member are installed in the same manner as described above, and a new lateral member is provided below the lateral member already installed between the soil retaining piles. After laying the members, push a sheet pile with the vertical dimension equal to the root cutting bottom depth and the horizontal dimension equal to the distance between the soil retaining piles from the ground between the soil retaining piles, and place the sheet piles on the back side of the newly laid lateral member. Make sure the bottom reaches. Root cutting and lateral member installation, and pushing the sheet pile,
By successively advancing to the preset depth of root cutting and finally backfilling the back side of each sheet pile, the earth retaining wall that supports the root cutting surface is completed.

In the method in which the sheet pile and the horizontal member are integrated and the sheet pile is installed at the same time as the transverse member is laid, a rectangular sheet pile having a lateral dimension slightly shorter than the distance between the soil retaining piles is used. A plurality of horizontal members are attached in advance at the same intervals as the vertical hole intervals of the retaining pile so that both ends thereof protrude from the side portion of the sheet pile and are used in an integrated state. We proceed with root cutting along the root cutting surface set in the same way as above, and when the holes facing each of the adjacent soil stopping piles are exposed by the number of lateral members attached to the sheet pile, either of the left and right sides of the sheet pile will be exposed. Insert the end of each cross member deeply into each corresponding hole so that the opposite end of each cross member does not contact the earth retaining pile on that side, and then place the entire sheet pile between the earth retaining piles. Put in. After that, move the entire sheet pile to the side opposite to the side where it was deeply inserted, insert the end of each side that was not inserted into each hole of the corresponding soil retaining pile, and insert the entire sheet pile between the soil retaining piles. Hold it. In the gap formed between the sheet pile and the soil retaining pile, an auxiliary sheet pile corresponding to the width of the gap is installed on the back side of the lateral member so as to close the gap to prevent escape of earth pressure from here. Similar to the above, if the root cutting and the installation of the sheet pile and the horizontal member are sequentially advanced to the preset root cutting bottom depth, the earth retaining wall that supports the root cutting surface is completed.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION As a soil retaining pile used in the root cutting and soil retaining method of the present invention, in addition to a steel pile having a cylindrical shape or a tubular shape having a polygonal cross section, a PC pile having a similar shape, RC
It doesn't matter if it is a pile. It is common to use holes in these pile bodies. The circumferential position where the holes for the soil retaining pile are provided can be freely set on any two side surfaces in the case of a cylinder with a polygonal cross section, and in any two circumferential positions in the case of a cylindrical shape. By using a large number of soil retaining piles having different orientations, the root cutting surface can be bent and arranged at various angles at the position of the soil retaining pile. A steel spiral blade is preferably attached to the bottom of the cylindrical earth retaining pile so that it can be driven by screwing.

The root cutting work in the present invention is carried out step by step such that the root cutting is carried out to a predetermined depth, the horizontal member and the sheet pile are installed to the root cutting surface to the depth, and then the root cutting is further advanced. Although it is desirable to do it in a working manner,
If the ground to be root-cut is relatively firm and there is no risk of collapse in the short term, a method may be used in which root cutting is performed all at once to the depth of the root cutting and then transverse members and sheet piles are installed.

As the lateral member used in the method of the present invention, an L-shaped angle, a chevron, or an H-shaped angle, which is made of durable steel and has a cross-sectional shape that is strong against bending, is preferable, but a pipe, a round bar, or a square bar is used. It doesn't matter. The holes in the soil retaining pile are also generally of the same shape as the cross-sectional shape of the transverse member. The transverse member may be attached to the hole of the soil retaining pile simply by inserting it as it is, but if the soil retaining pile is made of steel, it is preferable to further weld it in terms of strength.

The sheet pile used in the method of the present invention is generally made of a strong wooden board. For the size of the top and bottom, use the size that suits the installation method, such as the distance between the horizontal members that are laid in parallel between the soil retaining piles and a single plate that has the same depth as the root cutting bottom. The lateral members may be previously attached and integrated so that they are simultaneously attached between the soil retaining piles. In that case, a gap is created between the sheet pile and the soil pile, so it is desirable to install an auxiliary sheet pile to close the gap.

The soil retaining pile installed in the ground according to the method of the present invention is generally pulled out and removed when the root cutting part is backfilled after the main body construction such as foundation building and pipe burying is completed. However, it may be left as it is because it is related to the stability of the ground and cost.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments 1, 2, and 3 of the present invention will be described with reference to the drawings. Example 1 is an example of a method of inserting a sheet pile between two parallel horizontal members and installing it on the back side of the horizontal member, and Example 2 is an example of a method of pushing the sheet pile from the ground and installing it on the back side of the horizontal member. The third embodiment is an example of a method in which a sheet pile and a horizontal member are integrated and the sheet pile is installed at the same time when the horizontal member is installed. FIG.
3 is an explanatory view showing the root cutting and earth stopping method of Embodiment 1, FIG. 2 is a side view showing the earth stopping pile used in Embodiment 1, FIG.
6 is an explanatory view showing the installation method of the sheet pile of Example 1, FIG. 4 is an explanatory view showing the arrangement state of the soil retaining wall according to Example 1, FIG. 5 is an explanatory view showing the installation state of the sheet pile of Example 2, FIG. Is Example 3
FIG. 7 is an explanatory view showing the installation state of the sheet pile and the L-shaped angle, and FIG. 7 is an explanatory view showing the installation method of the sheet pile and the L-shaped angle of the third embodiment.

The soil retaining pile 1 used in the root cutting and soil retaining method of Example 1 is a root after press-fitting on the side surface of a cylindrical steel pile having a length of 8 m and ensuring a sufficient rooting length. Two sets of L-shaped holes 1a, into which the ends of the L-shaped angle 2 as a lateral member can be inserted, are provided at predetermined circumferential positions at 90 cm intervals from the position corresponding to the ground 7 in the upper half range exposed by cutting. The circumferential position where the two sets of L-shaped holes 1a are provided is set in accordance with the bending of the root cutting surface 5 to set the angle between the sheet piles 3 that directly support the root cutting surface 5 with the soil retaining pile 1 interposed therebetween. The L-shaped angles 2 for supporting the sheet pile 3 at the upper side and the lower side are arranged so that they can be inserted according to this angle. If the root cutting surface 5 is one continuous surface, L
The shaped holes 1a are provided so as to face each other at circumferential positions forming an angle of 180 ° so that the respective L-shaped angles 2 inserted therein are aligned. A spiral blade 1b for one round is provided at the bottom of the rooting portion of the soil retaining pile 1. When the soil retaining pile 1 is pushed into the ground 7 while rotating, it easily moves deep into the ground while screwing. The mechanism is such that it can be installed at the position of the root cutting surface 5 without generating noise or vibration. On the other hand, a press-fitting device (not shown) that pushes the soil retaining pile 1 onto the ground 7 is provided above the soil retaining pile 1.
In addition, a working hole 1c is provided for connecting to a pulling device (not shown) that pulls out the root cutting surface 5 from above when removing it from the root cutting surface 5.

In the root cutting and earth retaining method of Example 1,
First, in accordance with the layout of the root cutting surface 5, the soil retaining pile 1 in which the circumferential position of the L-shaped hole 1a that determines the direction of the sheet pile 3 is changed is set at a position corresponding to each position of the root cutting surface 5 of the ground 7. Are arranged at predetermined intervals and are pushed in while rotating vertically downward with respect to the ground 7 by a press-fitting device. The soil retaining pile 1 is guided by the lower spiral blade 1b to be swung into the soil and quickly enter the ground without generating noise or vibration. When the soil retaining pile 1 reaches a preset rooting depth, the pushing is stopped, and each L-shaped hole 1a of the soil retaining pile 1 is opened by a press-fitting device in a direction parallel to the root cutting surface 5. Rotate the soil retaining pile 1 to match. The soil retaining pile 1 has a cylindrical shape and can be easily rotated, and even if the L-shaped hole 1a is displaced from the correct position, it can be easily aligned, and it is not necessary to pull it out and realign it. After setting up the soil retaining pile 1, start root cutting little by little. When the root cutting is advanced along the root cutting surface 5 and the L-shaped holes 1a facing each other of the adjacent soil retaining piles 1 appear, L having a dimension slightly longer than the distance between these L-shaped holes 1a. First insert the angle 2 into the one L-shaped hole 1a, and then insert it between the two L-shaped holes 1a.
At the same time that the inserted part is returned, the other end is the other L-shaped hole 1
Insert it in a and attach it between the soil retaining piles 1 (Fig. 1
(B)). Root cutting and installation of the L-shaped angle 2 are advanced respectively, and if the L-shaped angle 2 is installed 90 cm below the already installed L-shaped angle 2 between the soil retaining piles 1, the top and bottom are longer than the L-shaped angle 2 interval. , The left and right are equal to the distance between the soil retaining piles 1, the sheet pile 3 is first inserted deeply from below between the upper L-shaped angle 2 and the ground 8 behind it, and pushed between the upper and lower L-shaped angles 2, And lower the inserted part, and at the same time place the lower edge on the lower L-shaped angle 2 and attach it between the L-shaped angles 2 (see FIG. 3). If the root cutting and the installation work of the L-shaped angle 2 and the sheet pile 3 are successively advanced to the depth of the root cutting bottom 6 which is set in advance, the root cutting will be performed while surely stopping the soil, which is safe. The work is completed on all the root cutting surfaces 5 and finally the root cutting bottom 6 is constructed, and the work is completed. A soil retaining wall 4 composed of the soil retaining pile 1, the L-shaped angle 2, and the sheet pile 3 firmly supports the root cutting surface 5 and does not hinder other subsequent work. When the temporary earth retaining wall 4 is to be removed, the sheet pile 3 and the L-shaped angle 2 may be removed in the reverse order of the above, and the earth retaining pile 1 may be pulled out by a pulling device after backfilling.

The root-cutting and earth-stopping method of the second embodiment is an example in which the single sheet having the root-cutting bottom depth in the vertical dimension is used as the sheet pile 3 in the first embodiment. The structure of the sheet pile 3 is the same as that of the first embodiment except for its mounting work. Similar to the first embodiment, the root cutting and the L-shaped angle 2 mounting are performed respectively, and when the L-shaped angle 2 is further mounted below the already mounted L-shaped angle 2, the upper and lower sides have the same dimension as the root cutting bottom depth, and the left and right sides are A sheet pile 3 having the same distance between the soil retaining piles 1 is pushed between the soil retaining piles 1 from the ground 7 so as to be located on the back side of each L-shaped angle 2 (see FIG. 5). Root cutting, attachment of L-shaped angle 2 and pushing of the sheet pile 3 are sequentially advanced to the depth of the root cutting bottom 6 that has been set in advance, and if the back side of the sheet pile 3 is fully back-filled at the end, the root cutting surface 5 will be securely The earth retaining wall 4 to support is completed.

The root cutting and earth stopping method of the third embodiment is an example of the first embodiment in which the L-shaped angle 2 and the sheet pile 3 are previously integrated and attached at the same time. Root cutting is carried out in the same manner as in Example 1, and a pair of L-shaped holes 1a facing each other for each soil retaining pile 1 and another set of L-shaped holes 1a 90 cm below them are provided in total. When the set is exposed, the vertical dimension of the sheet pile 3 has a length corresponding to two L-shaped hole 1a installation intervals of the soil retaining pile 1, and the left and right sides of the sheet pile 3 are slightly narrower than the distance between the soil retaining piles 1. L-shaped angle 2 at 1/4 and 3/4 positions from the top
Prepare a structure in which each of the sheet piles 3 is attached so as to protrude on either the left or right side of the sheet pile 3 by a length equal to the difference between the width of the sheet pile 3 and the distance between the soil piles 1. First, either side The ends of the L-shaped angle 2 above and below the corresponding L
After deeply inserting into the shaped holes 1a, put the whole between the soil retaining piles 1 and return the inserted amount a little, and at the same time, the other ends of the upper and lower L-shaped angles 2 correspond to the L-shaped holes on the other side. 1a and attach it between the soil retaining piles 1 (see FIG. 7). In the gap created between the sheet pile 3 and the soil retaining pile 1, an auxiliary sheet pile 3a corresponding to the width of the gap and having a vertical dimension equal to that of the sheet pile 3 is inserted from the front side of the root cutting surface 5, and the upper and lower L It is installed on the back side of the angle 2 to be aligned with the upper and lower sides of the sheet pile 3 to prevent escape of earth pressure from here. Root cutting and mounting of sheet piles and L-shaped angles are sequentially advanced to a preset depth of root cutting bottom 6 and finally sheet pile 3
By backfilling the backside sufficiently, the earth retaining wall 4 that securely supports the root cutting surface 5 is completed.

[0020]

According to the present invention, by adopting the above-mentioned method, the mounting direction of the sheet pile can be changed by setting the circumferential position of the hole of the soil retaining pile, which is the parent pile supporting the sheet pile, and the flat surface of the root cutting surface. It has a high degree of freedom in designing the layout shape and can handle various construction situations. Further, since the lateral members support the sheet piles, the bearing pressure of the root cutting surface increases, and the strength of the sheet piles itself can be reduced, which is economical because the cost of the sheet piles to be used is reduced.

When the method of using the soil retaining pile having a cylindrical shape and a spiral blade attached is employed, the soil retaining pile can be rooted in a single operation with little vibration and noise by using screwing. It is easy to secure the accuracy of posture and posture, and the work environment can be selected. Further, the work efficiency is high by omitting the labor of pre-digging and earth removal treatment, and the orientation can be easily adjusted at the time of rooting, resulting in excellent workability.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a root cutting and earth retaining method of a first embodiment.

FIG. 2 is a side view showing a soil retaining pile used in the first embodiment.

FIG. 3 is an explanatory diagram showing a method of installing the sheet pile according to the first embodiment.

FIG. 4 is an explanatory diagram showing an arrangement state of the earth retaining wall according to the first embodiment.

FIG. 5 is an explanatory diagram showing an installed state of the sheet pile according to the second embodiment.

FIG. 6 is an explanatory diagram showing a state of installation of a sheet pile and an L-shaped angle according to a third embodiment.

FIG. 7 is an explanatory diagram showing a method of installing the sheet pile and the L-shaped angle of the third embodiment.

FIG. 8 is an explanatory view showing a conventional root cutting and earth stopping method.

FIG. 9 is an explanatory view showing an arrangement state of a conventional earth retaining wall.

[Explanation of symbols]

 1 Earth retaining pile 1a L-shaped hole 1b Helical blade 1c Working hole 2 L-shaped angle 3 Sheet pile 3a Auxiliary sheet pile 4 Earth stop wall 5 Root cutting surface 6 Root cutting bottom 7 Ground 8 Ground 9 Drill 10 H-shaped steel 11 hole

Claims (8)

[Claims] 1. A soil retaining pile having a structure in which two sets of holes each having a predetermined shape are provided at a predetermined circumferential position on a side surface of a long cylindrical pile and are separated from each other by a predetermined distance in the vertical direction, and the ground is cut off. After placing for a predetermined interval along the root cutting surface position and placing it up to the rooting depth, after aligning the holes so that the adjacent soil retaining piles face each other, perform root cutting along the set root cutting surface, Both of the holes facing each other of the adjacent soil retaining piles are exposed, the ends of the lateral members are inserted into these exposed holes, the lateral members are provided between the holes, and the sheet pile is installed on the back side of the lateral members. Build earth retaining wall and support root cutting surface,
Root cutting and earth stop method. 2. The earth retaining pile is provided with two sets of holes of a predetermined shape on a side surface of a long cylindrical pile at predetermined circumferential positions and is separated from each other by a predetermined distance in the vertical direction, and at the bottom of the pile. It has a structure with a spiral blade for underground propulsion on the outer periphery of
The earth retaining pile is pushed vertically to the rooting depth while rotating with respect to the ground, and the soil retaining piles are rotated and aligned so that the holes face each other adjacent to each other. Root cutting and earth stop method. 3. The sheet pile is a rectangular shape whose vertical dimension is slightly longer than the distance between the holes in the vertical direction of the soil retaining pile and whose horizontal dimension is equal to the distance between the soil retaining piles. The root cutting and earth stopping method according to claim 1 or 2, wherein a sheet pile is inserted from the front side of the root cutting surface between the parallel horizontal members provided between the holes, and is installed on the back side of the horizontal member. 4. The sheet pile is formed into a vertically long rectangular shape having a vertical dimension equal to the root cutting bottom depth and a horizontal dimension equal to the distance between the soil retaining piles, and is horizontally disposed between the facing holes of the soil retaining piles. The root-cutting and earth-stopping method according to claim 1 or 2, wherein after the members are installed, the sheet pile is pushed in from the ground and installed on the back side of the lateral member. 5. The sheet pile is formed in a rectangular shape whose left and right dimensions are slightly shorter than the distance between the soil retaining piles, and a transverse member is provided on the front side of the sheet pile at the same spacing as the vertical hole spacing of the soil retaining piles. If a plurality of horizontal members attached to the sheet pile exposes the facing holes of the adjacent soil retaining piles, the horizontal members that protrude from the sheet pile are exposed. Insert the ends of these into these holes and extend them between the holes, and insert an auxiliary sheet pile that closes the gap created between the sheet pile and the soil retaining pile on the back side of the horizontal member, and simultaneously install the sheet pile at the same time as the horizontal member. The root cutting and earth retaining construction method according to claim 1 or 2, which is installed. 6. A soil retaining pile having a structure in which two sets of holes of a predetermined shape are provided on a side surface of a long tubular pile at predetermined peripheral positions and are separated from each other by a predetermined distance in the vertical direction. 7. A pair of holes of a predetermined shape are provided on a side surface of a long cylindrical pile at predetermined circumferential positions with a plurality of sets each being vertically separated from each other by a predetermined distance, and at the bottom outer periphery of the pile for underground propulsion. The soil retaining pile according to claim 6, wherein the pile has a spiral blade. 8. The shape of the hole is L-shaped, and the directions of the L-shape of the holes are left-right reversed at two circumferential positions.
The earth retaining pile according to claim 6 or 7.