JP2000017655A - Soldier piles and lagging method and groove forming member to be used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily installed horizontal laggings even though soil cement is filled up to the top end of H-section steel. SOLUTION: Pile holes 21 are excavated at predetermined intervals, H-section steel 1 is inserted to each pile hole, soil cement is injected and a main pile 20 is formed, one side of a line of the soldier piles is drilled forward, horizontal laggings are sequentially installed crossing between grooves of both H-frame steel facing each other and the retaining for other single side is carried out. In this case, included are a process of attaching groove forming member 3 capable of forming a groove for horizontal lagging supporting after forming the soldier pile to the H-frame steel before inserting a pile hole, a process of forming the soldier pile by using H-frame steel with a groove forming member, and a process of forming a groove 30 by the groove forming member and installing the horizontal lagging with the groove formed by the groove 30. Thus, means of attaching the groove forming member to the H-frame steel should be an adhesive or clips. The groove forming member is a groove section shaped having a groove with the width equivalent to the dimension of the thickness of the horizontal lagging and is made of a main body portion formed to a predetermined length and a lid portion 3b with the groove opening side closed, and the groove is formed by removing the lid portion.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parent pile horizontal sheet pile method applied when excavating the inside of a predetermined section when constructing a lower part of a building below the ground, and the method used in the method. And a groove forming member.

[0002]

2. Description of the Related Art The outline of the original parent pile horizontal sheet pile construction method is as follows. When a space for forming the lower part of a building is formed by digging down the ground, for example, inside a predetermined lane marking of the ground, excavate pile holes at predetermined intervals along the lane marking, and in each of the pile holes, Insert the H-section steel in a predetermined direction so that the grooves face each other with a gap between them, and inject soil cement (a mixture of soil and cement milk) to allow the soil cement to solidify. While digging inward from the row of H-sections, remove the solidified material in the H-section grooves appropriately and insert a horizontal sheet pile between the facing H-section grooves,
Retaining the outer estate adjacent to the compartment.
As the digging progresses, a new horizontal sheet pile is added to the lower side. By digging in this way, the ground which was surrounded by the H-section steel and the horizontal sheet pile inside the row of the H-section steel in a state where the ground collapse from the estate outside the row of the H-section steel was prevented. A lower space is formed. The above-mentioned injection of the soil cement is for making the H-shaped steel into a parent pile securely fixed to the ground.

However, in the recent parent pile horizontal sheet pile method, almost no soil cement is injected. In many cases, soil is put without soil cement, soil cement is poured only at the lower end of the H-section steel, and soil is put on it, or nothing is put at all. The reason why cement milk is not injected to the upper end of the H-section steel is that it is necessary to remove the solidified soil cement at the installation portion for the installation of the horizontal sheet pile described above, and the work takes time and increases costs. It is.

[0004]

When soil cement is not injected to the upper end of the H-section steel in the parent pile horizontal sheet pile method, the inside of the section may not be securely fixed to the ground because the H-section steel may not be securely fixed to the ground. As the digging progresses, the H-shaped steel may tilt and the ground of the estate outside the section may loosen. Also, depending on the direction in which the H-section steel is tilted, there is a problem that installation is difficult, such as adjustment of the length of the horizontal sheet pile. An object of the present invention is to make it possible to easily install a horizontal sheet pile even when soil cement is injected to the upper end of an H-section steel in the parent pile horizontal sheet pile method.

[0005]

According to the present invention, a pile hole is excavated at a predetermined interval, and an H-shaped steel is inserted into each of the pile holes in a predetermined direction so that the grooves face each other. Inject soil cement together to form a parent pile, excavate one side of the row of parent piles, and install horizontal sheet piles so as to straddle between the grooves of both facing H-sections, and retain the earth on the other side In the parent pile horizontal sheet pile construction method, a groove forming member capable of forming a groove for supporting the end portion of the horizontal sheet pile after the parent pile is formed is attached to a position where the horizontal pile sheet of the H-section steel is to be installed before being inserted into the pile hole. Forming the parent pile using the H-shaped steel to which the groove forming member is attached; forming a groove with the groove forming member and supporting an end in the groove to form a horizontal sheet pile; And a step of installing (claim 1).

In this means, before forming the parent pile, the groove forming member is attached to the H-shaped steel so that a groove for installing the horizontal sheet pile can be formed in advance. Even if it is a parent pile formed by injecting, a groove is formed by the groove forming member and a horizontal sheet pile is installed in the groove, so that the solidified soil inside the H-section steel is formed to form the groove. There is no need to remove cement.

The means for attaching the groove forming member to the H-section steel is preferably an adhesive. Alternatively, the means for attaching the groove forming member to the H-section steel includes:
A clip may be used (claim 3).

[0008] The groove forming member used in the means of the present invention comprises: a main body portion having a groove-shaped cross-sectional shape having a groove having a groove width corresponding to a thickness dimension of a horizontal sheet pile to be used; And a lid that closes the opening side of the groove, wherein the lid can be removed to form the groove (claim 4). Since this groove forming member forms a groove which can be inserted and supported by the end of the horizontal sheet pile by removing the lid portion, it is possible to prevent the soil cement from adhering to the inner surface of the groove, and the formed groove can be formed horizontally. It is easy to insert the end of the sheet pile and has a good guiding action.

Preferably, the groove forming member is provided with a reinforcing portion for external pressure in a direction crossing the groove of the main body portion, and the reinforcing portion is provided so as to be removable when forming the groove. Item 5). With this configuration, it is possible to suppress the deformation of the main body due to the external pressure acting on the main body when the soil cement is injected.

Preferably, the groove forming member includes a clip as an attaching means for attaching the main body to the H-section steel. With this configuration, when the groove forming member is attached to the H-section steel, a separate adhesive or member is not used, so that the attaching operation is easy.

The groove forming member is preferably formed by extruding a synthetic resin material. With this configuration, the groove forming member can be provided relatively inexpensively.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. In this method, a groove forming member 3 is used in addition to the H-section steel 1, the cross sheet 2 and the soil cement used in the ordinary parent pile horizontal sheet pile method. The groove forming member 3 to be used is attached to the H-shaped steel 1 as shown in FIG.
For example, it is formed of a plastic material such as vinyl chloride into a shape as shown in FIG. That is, as shown in FIG. 2A, the outer shape of the cross-sectional shape perpendicular to the longitudinal direction is rectangular, and the U-shaped main body 3 has a substantially uniform thickness.
a, a lid 3b closing the open side of the U-shape, and a reinforcing portion 3c extending along a short side provided so as to cross the central portion of the inside. The length of the long side of the rectangular section corresponds to the depth of the groove of the H-beam 1 to be applied, and the length of the short side substantially corresponds to the thickness of the cross sheet pile 2. The groove forming member 3 is formed by extrusion molding. The main body portion 3a and the lid portion 3b are formed with V-shaped cuts 10 and 10 and are connected by thin portions, and the main body portion 3a and the reinforcing portion 3c are formed. Cuts 11, 11, 12, and 12 are formed in substantially the same manner, and are connected by thin portions. This thin portion is such that the lid 3b and the reinforcing portion 3c can be removed by forming a groove when the groove is formed. After the extrusion molding, if necessary, the lid member 3b
Cuts 13 are formed over the entire surface at appropriate intervals, for example, at intervals of about the width of the horizontal sheet pile 2 or about half thereof, on the surface thereof. This is to make it easier to work by folding the lid 3b to an appropriate length.

The groove forming member 3 is, as shown in FIG.
The grooves 14 on both sides of the H-section steel 1 are pasted on one side of each of the grooves 14 with an adhesive. At this time, it is affixed in the range of the dimension D corresponding to the depth of digging down while retaining the soil, that is, the range from the upper end of the H-section steel to the depth where the horizontal sheet pile is installed. Since the groove forming member 3 is formed to have a suitable length for easy carrying, the groove forming member 3 is usually attached so as to have the dimension D, but the joint is closed with a seal tape or the like when adding. It is to be noted that the workability is further improved by preparing a joint that fits into the joint end of the groove forming member 3. The openings at the lower end and the upper end are closed with a suitable plate or a cap prepared in advance. This is to prevent soil and soil cement from entering the interior.

First, the parent pile horizontal sheet pile method is performed at a predetermined interval along a predetermined dug-down section, that is, a length dimension of the horizontal sheet pile 2 to be used, a thickness dimension of an intermediate portion of the H-section steel, and a groove. .., Twice the thickness of the body 3a of the forming member 3 plus the margin of the weak crown.
Are drilled, the H-shaped steel 1 with the groove forming members 3 attached thereto is inserted into each of the pile holes 21, and the soil cement 22 is injected and solidified to form the parent pile 20. FIG. 3 (a)
Is a schematic cross-sectional view of the ground on which the parent pile is formed, in which imaginary line 23 is a boundary line to be dug, 24 is a non-digged property, and 25 is a dug property.

When the soil is removed by digging down the estate 25, one side of the H-section steel 1 and the surface of the lid 3b of the groove forming member 3 are exposed. The cover portion 3b is lightly tapped with a small hammer or a bar or the like to be cut along the cuts 10, 10, and 13. In addition, the reinforcing portion 3c on the inner side also cuts off an appropriate length along the cuts 11 and 12. As a result, the groove 30 is formed. As shown in FIG. 3B, the horizontal sheet pile 2 is installed using the groove 30. The horizontal sheet pile 2 is installed such that the horizontal sheet pile 2 is simultaneously inserted into the grooves 30 on both sides corresponding to both ends from above the H-shaped steel. Subsequently, the trenches 30 and 3 are formed by digging down the estate 25 and breaking off the lid 3b and the reinforcing portion 3c.
When the formation of zeros and the installation of the cross sheet pile 2 are repeated, the other lot 25 is dug down while retaining the soil 24 on the side not dug down, and reaches a predetermined depth, and the parent pile cross sheet method is carried out. Ends the digging. The horizontal sheet pile 2 is installed in such a manner that it is always supplied from the upper side and is sequentially pushed down. Since this pressing operation is in a state where soil cement or the like does not adhere to the groove 30, it is smoothly performed by a good guiding action.

In this parent pile horizontal sheet pile method, it is necessary to attach the groove forming member 3 to the H-section steel 1, but this can be prepared in advance, and the work of breaking off the lid 3b and the reinforcing portion 3c. However, this operation is extremely simple and easy as compared with the operation of removing the soil cement solidified inside the H-section steel along the excavation of the estate 25. Efficiency is improved.

In the above embodiment, the groove forming member 3 is provided with the reinforcing portion 3c and the cut 13; however, this is related to the material and dimensions, and if the deformation due to external pressure is not large, the reinforcing portion 3c is omitted. Alternatively, the cut 13 may be omitted if the cutting is easy.

An adhesive is used as a means for attaching the groove forming member 3 to the H-section steel 1.
As shown in (a) and (b), the clip portion 40 may be formed integrally with the groove forming member 3 over the entire length, or may be attached by a separately formed clip 41. The clip portion 40 may be attached later after the groove forming member 3 has been buried, and in that case, the clip portion 40 may be provided partially instead of the entire length.

[0019]

According to the first, second, and third aspects of the present invention, the step of removing the soil cement inside the H-section steel, which is troublesome for installing the cross sheet pile, is eliminated, so that the original method can be achieved. Work efficiency does not change even if the parent pile is solidified by injecting soil cement up to the upper end of the H-section steel, and it is not necessary to reduce or omit the amount of soil cement injection. And work efficiency is improved. According to the fourth aspect of the present invention, it is possible to prevent soil cement from adhering to the inner surface of the groove, and the formed groove facilitates insertion of the end of the horizontal sheet pile and provides a good guiding action. The effect that work becomes easy is produced. According to the fifth aspect of the invention, since the deformation of the main body portion can be suppressed, there is an effect that a groove can be obtained in which the end of the horizontal sheet pile can be securely inserted into the groove. The invention described in claim 6 has an effect of facilitating an attaching operation when attaching the groove forming member to the H-section steel. The invention according to claim 7 is
There is an effect that the groove forming member can be provided relatively inexpensively.

[Brief description of the drawings]

FIG. 1 shows one embodiment of an H-section steel to which a groove forming member used in the method of the present invention is attached, (a) is a top view,
(B) is a partially omitted front view, (c) is a cross-sectional view taken along the line AA of (d), and (d) is a front view in a state where an upper portion of a lid is removed.

FIG. 2 shows an embodiment of a groove forming member used in the method of the present invention, wherein (a) is a plan view, (b) is a partial front view,
(C) is a partial side view.

FIG. 3 is an explanatory view of an embodiment of the method of the present invention,
(A) is a cross-sectional plan view of a state in which a parent pile is formed, (b) is a plan view of a state in which a groove is formed by a groove forming member and a horizontal sheet pile is being installed, and (c) is a front view of (b). It is.

FIG. 4 shows another embodiment of the H-section steel to which the groove forming member used in the method of the present invention is attached, (a) is a partial perspective view using the clip-integrated groove forming member, (b) FIG. 3 is a perspective view in which a groove forming member is attached using a clip.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 H-section steel 2 Horizontal sheet pile 3 Groove forming member 3a Main part 3b Lid 3c Reinforcement part 10 Cut 11 Cut 12 Cut 13 Cut 14 H-shaped groove 20 Parent pile 21 Pile hole 22 Soil cement 23 Drilling boundary line 24 Property on the side 25 Property on the side digging down 30 Groove 40 Clip part 41 Clip

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[Procedure amendment]

[Submission date] May 27, 1999 (1999.5.2
7)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Claim 4

[Correction method] Change

[Correction contents]

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

According to the present invention, a pile hole is excavated at a predetermined interval, and an H-shaped steel is inserted into each of the pile holes in a predetermined direction so that the grooves face each other. Inject soil cement together to form a parent pile, excavate one side of the row of parent piles, and install horizontal sheet piles so as to straddle between the grooves of both facing H-sections, and retain the earth on the other side In the parent pile horizontal sheet pile construction method, a groove for supporting the end portion of the horizontal pile sheet can be formed after the parent pile is formed at a position where the horizontal pile sheet is to be installed on one side of the groove inside surface of the H-section steel before being inserted into the pile hole. Channel
A step of Ru attaching the formed member, a step of using the H-shaped steel forming the parent pile fitted with the groove-shaped formation member, the parent
After pile formed with burrows one side of the column of Shinkui before Kimizogata formed
A groove is formed by part material by supporting the end portions in the groove, characterized in that it comprises a step of installing a lateral sheet pile with (claim 1).

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

The groove forming member used in the means of the present invention comprises: a main body having a groove-shaped cross-sectional shape having a groove having a groove width corresponding to a thickness dimension of a horizontal sheet pile to be used ;
Of which is constituted by a lid portion closing the opening side of the front Kimizo of the body portion, and characterized in that it is capable of forming a groove by removing the lid (claim 4). This groove forming member,
By removing the lid, a groove is formed that can insert and support the end of the horizontal sheet pile, so it is possible to prevent soil cement from adhering to the inner surface of the groove, and the formed groove inserts the end of the horizontal sheet pile. It is easy to perform and has a good guiding action.

Claims (7)

[Claims] 1. A pile hole is excavated at a predetermined interval, an H-shaped steel is inserted into each pile hole in a predetermined direction so that grooves are opposed to each other, and soil cement is injected to set a parent pile. In the parent pile horizontal sheet pile method of forming and digging one side of the row of parent piles and sequentially installing horizontal sheet piles so as to straddle between the grooves of both facing H-beams and retaining the soil on the other side, A groove forming member capable of forming a groove for supporting an end portion of the horizontal sheet pile after the parent pile is formed is attached to a position where the horizontal pile sheet is to be installed in the H-section steel before being inserted into the pile hole, and the groove forming member is mounted. Forming the parent pile using the H-shaped steel, and forming a groove with the groove forming member, and supporting the end portion of the groove to install a cross sheet pile, Parent pile horizontal sheet pile construction method. 2. The method according to claim 1, wherein the means for attaching the groove forming member to the H-section steel comprises:
A parent pile horizontal sheet pile construction method using an adhesive. 3. The parent pile horizontal sheet pile construction method according to claim 1, wherein the means for attaching the groove forming member to the H-section steel comprises:
A parent pile horizontal sheet pile construction method using a clip. 4. The groove forming member used in the parent pile horizontal sheet pile method according to claim 1, wherein the groove forming member has a groove-shaped cross-sectional shape having a groove having a groove width corresponding to a thickness dimension of a horizontal sheet pile to be used. And a lid that closes the opening side of the groove, and the groove can be formed by removing the lid. 5. The groove forming member according to claim 4, wherein a reinforcing portion for external pressure is provided in a direction crossing the groove of the main body portion, and the reinforcing portion is provided so as to be removable when forming the groove. A groove forming member characterized by the above-mentioned. 6. The groove forming member according to claim 4, wherein the main body has a clip as an attaching means for attaching to the H-shaped steel. 7. The groove forming member according to claim 4, wherein the groove forming member is formed by extruding a synthetic resin material.