JPS6059228A - Steel sheet pile sheathing work using stay steel sheet pile - Google Patents

Abstract

PURPOSE:To perform sheathing work more simply and at lower cost than the other methods by a method in which steel sheet piles are driven in a circular from at given intervals, stay steel sheet piles are connectedly driven from the crossing points of circular arcs, anchors are provided on the final end, and the front of the circular steel sheet piles is excavated. CONSTITUTION:Steel sheet piles 1 for sheathing are connectedly driven in a circular form at given intervals in such a way as to extend the sheet piles toward the excavation side. Steel sheet piles 1 as stay steel piles 2 are driven connectedly from crossing points of the circular arcs. Anchor metals 3 are attached to the final ends of the stay steel sheet piles 2 and driven to the back of the active degradation angle, and then excavation is made to given subsoil. The load of the sheathing is offset by the tensile force of the steel sheet piles, and the tensile strength can be increased by the friction force of the surrounding ground.

Description

Detailed Description of the Invention In earth retaining work, straight steel sheet piles are connected and driven as earth retaining steel sheet piles at predetermined intervals so as to protrude toward the excavation side. This invention relates to a steel sheet pile earth retaining method in which straight steel sheet piles are connected as steel sheet piles, anchor fittings are fixed to the final ends, and the anchor fittings are fixed and driven into one piece, and then root cutting is carried out to a predetermined ground level.

Conventionally, the stabilization of earth retaining walls in earth retaining works has been carried out by raising the slope, installing struts or earth retaining anchors, but the installation of these struts or earth retaining anchors can be done at the position where the struts or anchors are installed. To the position &! After cutting, struts or anchors are installed to stabilize the retaining wall. In this case, if you install a strut or anchor and then excavate below the location where the strut or earth retaining anchor is installed, the earth retaining wall will deform due to the excavation, and the load on the strut or earth retaining anchor will increase and the ground surface will deform. There was a drawback to growing up.

This invention solves the above-mentioned drawbacks and connects straight steel sheet piles as circular arc-shaped earth retaining steel sheet piles and bracing steel sheet piles so as to protrude toward the excavation side, and attaches anchor fittings to the final ends of the straight steel sheet piles. This method provides an earth retaining method that can be used in a variety of ways.

Next, embodiments of the present invention will be described based on the drawings. FIG. 1 is a plan view of the present invention, FIG. 2 is a longitudinal sectional view, and FIG. 3 is a detailed view of the installation of the steel sheet pile and anchor fittings. In the figure, the straight Wi sheet piles are connected and driven in a circular arc so as to project toward the excavation side at predetermined intervals to the left of the ground as earth retaining steel sheet piles, and the straight steel sheet piles as retaining steel sheet piles are driven from the intersection point B of each arc. Connect and drive to the back A-A line of the active collapse angle,
In addition, a flat or concave anchor metal fitting 3 is fixed to the end of the steel sheet pile 2, and the anchor metal fittings 3 are fixed to the ground S to a predetermined depth (if necessary, reinforcement M& is installed as shown).
This is a steel sheet pile earth retaining method.

Therefore, by connecting and driving the earth-retaining steel sheet piles in an arc shape, the load from the back can be resisted by the tensile force of the earth-retaining steel sheet piles. By attaching it, it becomes possible to increase the tensile resistance force due to the frictional force with the surrounding soil, and the ground S can be excavated to a predetermined depth at one time.

As mentioned above, compared to the conventional steel sheet pile earth anchor construction method and steel sheet pile double cofferdam construction method, this invention is advantageous in terms of construction period, enables the diversion of earth retaining materials, and is expected to lower construction costs. .

[Brief Description of the Drawings] Fig. 1 is a plan view of the present invention, Fig. 2 is a longitudinal sectional view, and Fig. 3 is a longitudinal sectional view of the present invention.
The figure shows a detailed view of the installation of the steel sheet pile and anchor fittings. /: 2nd floor sheet pile 2: Steel sheet pile 3, anchor metal fittings Il: Reinforcement material S: Ground O: Intersection part

Claims (1)

[Claims] In earth retaining work, straight steel sheet piles as earth retaining steel sheet piles are directly connected and driven in an arc shape so as to project toward the excavation side at specified intervals, and the straight steel sheet piles are connected as backing steel sheet piles on the opposite side from the intersection of each arc. The steel sheet pile earth retaining method is characterized in that the anchor fittings are fixed to the final end of the straight steel sheet piles, and the anchor fittings are driven as one piece to the back of the main slope collapse angle, and then the roots are cut to a specified ground level. construction method