JPH05287745A - Mounting method for wale in column aligning method - Google Patents

Abstract

PURPOSE:To simplify a chipping work for mortar and to perform easy and rapid mounting of a wale. CONSTITUTION:A vertical shaft 1 is excavated, a parent pile 3 is driven in the vertical shaft 1, and further, mortar 5 is injected in the vertical shaft 1 and cured to build a column 7 in a ground. A number of the columns 7 are laterally aligned. A wale 23 is applied between the columns 7 as a ground on the one side partitioned by the columns 7 is excavated downward. The wale 23 is supported by a shore 25. In the column aligning method, before the parent pile 3 is driven in the vertical shaft 1, a member 13 for forming a space is removably mounted on a parent pile 3 part with which the wale 23 is brought into contact. When the wale 23 is mounted, the member 13 for forming a space is removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pillar row construction method used as one of underground continuous wall construction methods.

[0002]

2. Description of the Related Art In the column construction method, a continuous wall is made underground under the following procedure. First, the vertical hole is excavated. next,
Insert H-shaped steel (main pile) into the vertical hole. Next, mortar is poured into the vertical holes and solidified to form pillars, and a large number of such pillars are formed at intervals in the lateral direction along the place where the continuous wall is formed. In addition, between the columns in which the H-shaped steel is inserted, vertical holes are drilled, and then mortar is injected and solidified to form columns of only mortar.

Next, the ground on one side defined by these pillars is excavated, and every time a predetermined depth is excavated, an abdomen is applied over each pillar, and the abdomen is supported by a notch. In order to prevent the column from collapsing, it is necessary to dispose the bellows by connecting it to the H-shaped steel inside the mortar, not to the mortar. Therefore, conventionally, the mortar of the portion to which the abdomen is connected is suspended manually or by using a machine to expose the H-shaped steel.

[0004]

Therefore, in the conventional column-row construction method, there is a problem in that it is difficult to mount the mortar when the bellows are attached, and it is not possible to attach the bellows easily and quickly. In particular, in underground construction, manual work of mortar chipping in the SMW method is forced under the lining plate and near the buried pipe.
The work environment was also bad, so improvement was desired. The present invention has been devised to eliminate the above-mentioned inconvenience, and an object of the present invention is to attach bellows in a column row method that simplifies the work of mortar chipping and allows quick and quick attachment of bellies. To provide a method.

[0005]

Means for Solving the Problems The present invention, which achieves the above object, is to excavate a vertical hole, drive a main stake into the vertical hole, and further inject mortar into the vertical hole to solidify the mortar into the ground. Pillars are provided, and a large number of such pillars are arranged in a row in the lateral direction. While excavating the ground on one side defined by these pillars downward, abdomen is applied between the pillars, and the abdomen is cut. In the column row construction method that is supported by tension, before driving the main pile into the vertical hole, detachably attaching the space forming member to the portion of the main pile with which the bellows abuts, and attaching the bellows In addition, the space forming member is removed.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. When making an underground continuous wall by the pillar row method, first,
As shown in the plan view of FIG. 1, the vertical hole 1 is drilled with an earth drill or the like. Next, the H-shaped steel (main pile) 3 is inserted into the vertical hole 1. Next, the mortar 5 (see FIG. 2) is injected into the vertical hole 1 and the mortar 5 is solidified to form the pillar 7. Similarly,
A large number of such pillars 7 are made laterally at intervals. Next, a vertical hole 9 is drilled between the pillars 7, the mortar 5 is injected into the vertical hole 9, and the mortar 5 is solidified to form the mortar 5.
Make chisel pillar 11. In this way, the columns 11 made of only the mortar 5 are made between the columns 7, and the columns 7 and 11 form a continuous wall.

In the above work, as shown in FIGS. 2 and 3, styrofoam (space forming member) 13 is attached to the portion of the H-shaped steel 3 where the bellows are connected. The Styrofoam 13 is attached to the H-shaped steel 3 with, for example, bolts 15. As shown in FIG. 4, the styrofoam 13 is formed in such a size that the bracket 21 and the bellows 23 can be accommodated in the vertical direction. Further, the contour of the styrofoam 13 viewed from above is formed in a size corresponding to the space between the side plate 3A of the H-shaped steel 3 and the inner wall of the vertical hole 1, as shown in FIG. In this case, if the outside of the styrofoam 13 is made arcuate so as to correspond to the inner circumference of the vertical hole 1, the number of places where the mortar 5 is attached is further reduced, which is convenient.

Next, the ground on one side defined by the pillars 7 is excavated, and every time the excavation is carried out to a predetermined depth, the belly-up 23 and the notch 25 are attached to prevent the continuous wall from collapsing. . Here, when attaching the belly up 23 and the notch 25, the styrofoam 13 and the mortar around it (shown by diagonal lines a, b, and c in FIG. 1) are removed. This removal work may be performed by removing only the thin mortar 5 on the outer peripheral portion of the vertical hole 1 for the mortar 5, and for the Styrofoam 13 by removing the bolts 15, or the Styrofoam 13 It may be carried out by crushing itself. Therefore, the side plate of the H-section steel 3 can be exposed very easily as compared with the case of mounting the uniformly filled mortar 5 as in the conventional case.

Next, as shown in FIGS. 4 and 5, the bracket 21 is attached to the exposed side plate 3A of the H-shaped steel 3,
An abdomen riser 23 is placed on the bracket 21 so as to face the front of each pillar 7, and the abdomen riser 23 and the tip of the cut 25 are connected. Then, the side plate 3A of the H-shaped steel 3 and the bellows 23
The space between and is filled with concrete 27 and solidified to connect the H-shaped steel 3 and the waving up 23, whereby the collapse of the continuous wall is prevented. The attachment of the abdomen 23 and the cut 25 is sequentially performed every time a predetermined depth is excavated.

Thus, according to this embodiment, the mortar 5
Since the shaving work is simplified and the styrofoam 13 is removed, the side plate 3A of the H-shaped steel 3 can be exposed very easily, so that it is possible to easily and quickly attach the bellows 23.

As the space forming member, other members such as wood may be used, but the styrofoam 1
When a member such as No. 3 is used, it is advantageous in terms of easy crushing and weight reduction. Further, the space forming member is not limited to being attached by the bolt 15, but may be attached by using a wire or the like.

[0012]

As is apparent from the above description, according to the method for attaching abdomen accelerating according to the present invention, the space forming member is detachably attached to the portion of the main pile where the abdomen accelerating abuts, and the abdomen accelerating is performed. Since the space forming member is removed when attaching the mortar, the mortar chipping work can be simplified and the abdomen can be easily and quickly attached.

[Brief description of drawings]

FIG. 1 is a plan view showing the relationship among vertical holes, H-shaped steel, and styrofoam.

FIG. 2 is a cross-sectional side view showing a state in which mortar is injected after inserting H-shaped steel to which Styrofoam is attached into a vertical hole.

FIG. 3 is a perspective view of an essential part of the H-section steel to which Styrofoam is attached.

FIG. 4 is a cross-sectional side view showing a connected state of an H-shaped steel, an upset and a cut.

FIG. 5 is a plan view showing a connected state of an H-shaped steel, an upset and a cut.

[Explanation of symbols]

 1,9 Vertical hole 3 H-shaped steel 5 Mortar 7,11 Column 13 Styrofoam 21 Bracket 23 Raised 25 Cut and cut 27 Concrete

Claims (1)

[Claims] 1. A vertical hole is excavated, a main pile is driven into the vertical hole, and mortar is injected into the vertical hole to solidify the pillar to provide a pillar in the ground. In the column row construction method in which the abdomen is applied between the columns while excavating the ground on one side defined by these columns downward, and the abdomen is supported by cutting, Before driving the main pile into the hole, a space forming member is detachably attached to the portion of the main pile where the belly up abuts, and this space forming member is removed when the belly up is attached. The method of attaching the abdomen in the column construction method which is a feature.