JPH0551926A - Constructing method for steel pipe sheet pile wall - Google Patents

Abstract

PURPOSE:To construct a steel pipe sheet pile wall, which requires a pre- excavation, reasonably in a short term. CONSTITUTION:Into steel pipe casings 1, the screw augers 2 of an earth auger excavator are inserted, and in ground, the holes 3 of required depths are excavated, and into the excavated holes 3 for the screw augers 2 taken out, steel pipe sheet piles 4 having each one wing-shaped steel sheet joint 4a on both the sides are inserted. After that, a process for drawing the steel pipe casings 1 is performed adjacently in order at every required interval, and in spaces between the joints 4a of the respective steel pipe sheet piles 4, the cut-off steel members 5 of H-shape steels with the horizontally directed end surfaces are fitted to be placed, and a steel pipe sheet pile wall is constructed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a steel pipe sheet pile wall used for earth retaining or the like.

[0002]

2. Description of the Related Art Conventionally, when constructing a steel pipe sheet pile wall, if the ground is hard and it is necessary to perform excavation in advance, first, a screw auger of an earth auger excavator is inserted into the steel pipe casing to excavate the earth. At the same time, cement milk was injected from the tip of the screw auger, the injected cement milk and the excavation soil were mixed to make soil cement, and when the steel pipe casing and the screw auger were pulled out from the excavation hole when excavating to the required depth. , A process of inserting a steel pipe sheet pile having a plane-arc-shaped steel connecting member (arc-shaped joint) on one side and a steel guide pipe (tubular joint) on the other side into a drill hole filled with soil cement While sequentially adjoining each other at required intervals, the tubular joint of the steel pipe sheet pile inserted earlier is fitted with the arcuate joint of the steel pipe sheet pile inserted later. And has (see JP-B-58-3091).

[0003]

By the way, in the above-mentioned conventional method, since the joints of the steel pipe sheet piles are fitted to each other, the steel pipe casing must be pulled out before the steel pipe sheet piles are struck. It is necessary to perform the excavation of the steel pipe and the placement of the steel pipe sheet pile with high accuracy.Because the steel pipe sheet pile is placed after the steel pipe casing is pulled out, cement milk is injected in advance, and the injected cement milk and the excavation soil are mixed. Since it is necessary to replace the ground with mixed soil cement, there is the problem of inefficiency and a long construction period.

[0004]

DISCLOSURE OF THE INVENTION The present invention was developed to solve the problems of the above-mentioned conventional method, and the first gist thereof is to provide a steel pipe casing with a screw auger for an earth auger excavator. Inserting, excavating a hole of the required depth in the ground, in the excavation hole that took out the screw auger, after inserting the steel pipe sheet pile having joints on both sides, the step of pulling out the steel pipe casing, sequentially at required intervals It is a method of constructing a steel pipe sheet pile wall, which is performed adjacently and a steel member for water stopping is fitted and inserted between the joints of the steel pipe sheet piles.

The second gist of the present invention is as follows.
Insert the screw auger of the earth auger excavator into the steel pipe sheet pile with joints on both sides, excavate the hole of the required depth in the ground, install this steel pipe sheet pile in the ground, and then take out the screw auger In the method for constructing a steel pipe sheet pile wall, a water-stopping steel member is inserted and driven between joints of the respective steel pipe sheet piles in order at required intervals.

[0006]

According to the first aspect of the method of the present invention, since the steel member for water stopping is fitted and driven between the joints of the respective steel pipe sheet piles without fitting the joints of the respective steel pipe sheet piles, the steel pipe casing is mounted. With the remaining state, the steel pipe sheet pile can be inserted into the drilled hole from which the screw auger has been taken out, and therefore it is not necessary to perform the hole drilling and the steel pipe sheet pile mounting with high precision,
Moreover, since the steel pipe casing is pulled out after the steel pipe sheet pile is placed, there is no need to replace the ground with soil cement, etc., so that the steel pipe sheet pile wall can be constructed more reasonably and in a shorter period of time than the conventional method. ..

Further, as in the second aspect of the method of the present invention, the steel pipe sheet pile itself is substituted for the steel pipe casing.
The steel pipe sheet pile wall can be constructed more reasonably and in a shorter period of time than the method of the present invention according to the above point.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the method of the present invention will be described with reference to FIGS. 1 to 4. As shown in FIG. 1, a screw auger 2 of an earth auger excavator is inserted into a steel pipe casing 1 to be installed in the ground. Drilling a hole 3 of depth, as shown in FIG.
After inserting the steel pipe sheet pile 4 having one blade-shaped steel plate joint 4a on both sides into the excavation hole 3 from which the screw auger 2 has been taken out, as shown in FIG. 3, the steel pipe casing 1 is pulled out, and these steps are sequentially performed. Adjacent to each other at intervals, as shown in FIG. 4, between the joints 4a of the steel pipe sheet piles 4, the water-stopping steel member 5 of H-shaped steel having the end face in a lateral direction is fitted and driven,
The steel pipe sheet pile wall is constructed. Prior to the insertion of the steel pipe sheet pile 4, if necessary, root consolidation is performed.

A second embodiment of the method of the present invention will be described with reference to FIGS. 5 to 8. As shown in FIG. 5, a steel pipe sheet pile 4 having two blade-shaped steel plate joints 4a on both sides is provided as shown in FIG.
After inserting the screw auger 2 of the earth auger excavator, excavating the hole 3 of the required depth in the ground, and installing the steel pipe sheet pile 4 in the ground, take out the screw auger 2 as shown in FIG. , These steps are sequentially performed adjacent to each other at required intervals, and as shown in FIG.
The water-stopping steel member 5 made of a steel plate is fitted and driven between a and the steel pipe sheet pile wall is constructed.

Incidentally, the steel pipe sheet pile 4 in the first embodiment.
May have a wing-shaped steel plate joint 4a of two plates as shown in FIG. 5, and the steel member 5 for waterproofing used in that case uses a steel plate as shown in FIG.

Further, the steel pipe sheet pile 4 in the second embodiment.
May have one blade-shaped steel plate joint 4a as shown in FIG. 2, and the water-stop steel member 5 used in that case is H-section steel as shown in FIG. Further, the joint 4a of the steel pipe sheet pile 4 and the steel member 5 for waterproofing may be welded if necessary.

[0012]

As described in the first aspect of the method of the present invention, the steel member for water stopping is fitted and driven between the joints of the steel pipe sheet piles without fitting the joints of the steel pipe sheet piles to each other. The steel pipe sheet pile can be inserted into the excavation hole from which the screw auger has been taken out with the steel pipe casing left, and therefore, there is no need to dig the hole and place the steel pipe sheet pile with high precision. Since the steel pipe casing is pulled out after the casting, it is not necessary to replace the ground with soil cement or the like. Therefore, the steel pipe sheet pile wall can be constructed more reasonably and in a shorter time than the conventional method.

Further, as in the second aspect of the method of the present invention, the steel pipe sheet pile itself is substituted for the steel pipe casing.
The steel pipe sheet pile wall can be constructed more reasonably and in a shorter period of time than the method of the present invention according to the above point.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first step in a first embodiment of the method of the present invention.

FIG. 2 is a plan view showing a second step in the first embodiment.

FIG. 3 is a plan view showing a third step in the first embodiment.

FIG. 4 is a plan view showing completion of construction of a steel pipe sheet pile wall in the first embodiment.

FIG. 5 is a plan view of a steel pipe sheet pile used in the second embodiment of the method of the present invention.

FIG. 6 is a vertical sectional view showing a first step in the second embodiment.

FIG. 7 is a plan view showing a second step in the second embodiment.

FIG. 8 is a plan view showing completion of construction of a steel pipe sheet pile wall in the second embodiment.

[Explanation of sign]

 1 Steel Pipe Casing 2 Screw Auger 3 Drilling Hole 4 Steel Pipe Sheet Pile 4a Joint 5 Steel Member for Water Stopping

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Chiyomaru Takahashi 2-3-2 Uchisaiwaicho, Chiyoda-ku, Tokyo Kawasaki Steel Works Tokyo Head Office (72) Inventor Taichi Kuwagaki 1-chome Shibata, Kita-ku, Osaka-shi, Osaka No. 1-4 Kawatetsu Construction Co., Ltd. Osaka Works (72) Inventor Seki Daiken 2-9-7 Ikenohata, Taito-ku, Tokyo Inside Kawatetsu Construction Co., Ltd.

Claims (4)

[Claims] 1. A screw auger for an earth auger excavator is inserted into a steel pipe casing to excavate a hole of a required depth in the ground, and the excavation hole from which the screw auger is taken out,
After inserting the steel pipe sheet piles having joints on both sides, the steps of pulling out the steel pipe casings are sequentially performed adjacent to each other at required intervals, and water-stopping steel members are inserted and mounted between the joints of the steel pipe sheet piles. Method for constructing steel pipe sheet pile wall. 2. A screw auger of an earth auger excavator is inserted into a steel pipe sheet pile having joints on both sides to excavate a hole of a required depth in the ground, and the steel pipe sheet pile is installed in the ground, and then screwed. A method for constructing a steel pipe sheet pile wall, characterized in that the steps of taking out the auger are sequentially performed adjacent to each other at required intervals, and a steel member for waterproofing is fitted and inserted between the joints of the steel pipe sheet piles. 3. Joints on both sides of the steel pipe sheet pile are one wing-shaped steel sheet, and the water-stopping steel member fitted and inserted between the joints of the respective steel pipe sheet piles has end faces in a lateral direction. H
The steel pipe sheet pile wall construction method according to claim 1 or 2, wherein the steel pipe sheet pile wall is a shaped steel. 4. Joints on both sides of the steel pipe sheet pile are two blade-shaped steel plates, and the water-stopping steel member to be fitted and inserted between the joints of the steel pipe sheet piles is a steel plate. The method for constructing a steel pipe sheet pile wall according to claim 1 or 2, characterized in that