JP2733722B2 - Construction method of deep foundation pile type retaining wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial application field] When a deep foundation pile is used as a freestanding retaining wall, a retaining wall between the deep foundation piles is required. The present invention relates to a method for constructing the deep foundation pile type retaining wall.

[0002]

2. Description of the Related Art In general, a self-supporting deep foundation is subjected to a process of pile core surveying, installation of a top ring, installation of a turret, excavation and installation of a liner plate, arrangement of reinforcements in a liner plate, and placement of concrete. Piles a are lined up, and flooring is repeated in such a manner that the excavation of the front soil of each deep foundation pile a and the construction of the temporary retaining wall g between adjacent deep foundation piles a are repeated.

In the figure, c is a flooring surface, d is a construction base surface, and an angle steel f is welded to a liner plate e bolted in a ring shape, and a horizontal sheet pile as a temporary retaining wall g is interposed between the angle steel f. After the installation, a permanent cast-in-place reinforced concrete retaining wall h is constructed between the liner plates e constituting the deep foundation pile. In the figure, i is a concrete anchor portion. (FIG. 8
reference)

[0004]

In the above-mentioned conventional method, when the permanent retaining wall is constructed, a series of steps of detaching a concrete anchor, a reinforcing bar, a formwork, and a shoring from a concrete anchor due to the deterioration of labor conditions in recent years. It takes a lot of time to work on site,
There was a problem that the construction period was postponed and the construction cost increased.

The present invention has been proposed in view of the above-mentioned problems of the prior art, and its object is to improve workability, save labor, shorten the construction period, and reduce construction costs. Another object of the present invention is to provide a construction method of a deep foundation pile retaining wall.

[0006]

According to the present invention, there is provided a method for constructing a deep foundation pile type retaining wall according to the present invention.
In the method of constructing a deep foundation pile retaining wall in which a deep foundation pile constructed at predetermined intervals is joined with a retaining wall, a groove formed by long and short side walls on a liner plate constituting each of the deep foundation pile bodies. Attaching the joint panels having a cross section integrally, arranging horizontal sheet piles between the long side walls of the adjacent joint panels, and fitting both ends of the precast concrete wall between the groove-shaped cross sections of the joint panels. Is what you do.

[0007]

According to the present invention, as described above, in the method of constructing a deep foundation retaining wall in which the deep foundation piles formed at predetermined intervals are joined by the retaining wall, the liner constituting each of the deep foundation piles is provided. The joining panel having a groove-shaped cross section composed of both long and short side walls is carried into the site, and is integrally attached to the liner plate, whereby the joining panel can be easily attached. Thereafter, by arranging the cross-sheets between the long side walls of the joint panels opposed to each other, the work of attaching the angle steel for mounting the cross-sheets in the temporary soil is omitted. By fitting a precast concrete wall for retaining in the channel-shaped cross-sections of the two joint panels, on-site work such as concrete anchoring work, rebar work, and formwork work can be omitted.
Further, since the precast concrete wall can be appropriately divided in the depth direction, it can be handled by a small construction machine when transporting and building.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In the same manner as the conventional method, pile core surveying, installation of the uppermost ring, setting up of the turret, excavation and liner plate 1
And the joining panel 3 are installed. The liner plate 1 is provided with an axial flange 1a and a circumferential flange 1b on the peripheral edge of the arc-shaped main body, and a joint bolt hole 2 is provided.

The joining panel 3 is formed in a groove-shaped cross section composed of a long side wall 3a and a short side wall 3b, and the side walls 3a, 3b and 3'a, 3 ' A stiffener 4 is provided between 3'b, and a bolt hole 5 is formed in the stiffener 4. Reference numeral 6 denotes a plate for joining the adjacent liner plates 1 disposed at the ends of 3a 'and 3b' constituting a part of the liner plate. In the figure, reference numeral 6a denotes a joint bolt hole.

[0010] The connection of the excavation and connection and installation of the joint panel 3 and the liner plate 1 is repeated up to the pile length, and a reinforcing bar is assembled in the liner plate 1 and concrete is cast to construct a deep foundation pile. Excavation of the front soil after construction of the deep foundation pile and installation of the horizontal sheet pile 8 between the long side walls 3a, 3a of the joining panels 3, 3 of the adjacent liner plates 1, 1 are repeated to a predetermined floor surface. Execute. Further, a precast concrete plate 7 is erected between the joining panels 3 and 3 of the liner plate 1 and drainage is performed.

[0011]

According to the present invention, as described above, when the deep foundation pile type retaining wall is formed by joining the deep foundation piles turned at predetermined intervals with the retaining wall, each of the above deep foundation piles is constructed. A joint panel having a groove-shaped cross section composed of both long and short side walls is integrally attached to a liner plate constituting the pile main body, and a horizontal sheet pile is disposed between the long side walls of both adjacent joint panels. By fitting both ends of the precast concrete wall between the channel-shaped cross-sections of the panel, reinforced concrete, concrete work,
Labor savings in on-site labor such as formwork are achieved, the construction period is shortened, and construction costs are reduced.

In addition, the joint panel is brought to the site by a factory, and the same joint panel as that of the standard section is used. Therefore, the same mounting method as that of the conventional liner plate is adopted. Is easy to assemble. In addition, the mounting of the horizontal sheet pile of the temporary domes is easily performed,
The mounting of the angle steel for mounting the horizontal sheet pile is omitted.

Further, since the precast concrete wall is appropriately divided in the depth direction, a small construction mechanism can be used for transportation and installation.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view showing an embodiment of a method for constructing a deep foundation pile type retaining wall according to the present invention.

FIG. 2 is a plan view of a liner plate.

FIG. 3 is a longitudinal sectional view of FIG. 2;

FIG. 4 is a view as viewed from the direction of the arrow in FIG. 2;

FIG. 5 is a front view of the joint panel, and is a Nini view as seen from the arrow in FIG. 7;

FIG. 6 is a roro view taken in the direction of arrows in FIG. 5;

FIG. 7 is a diagram viewed from the arrow in FIG. 5;

FIG. 8 is a cross-sectional plan view showing an implementation state of a conventional method.

FIG. 9 is a conceptual diagram of a construction method of a deep foundation pile type retaining wall.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liner plate 2 Joining bolt hole 3 Joining panel 3a Long side wall 3b Short side wall 4 Stiffener 5 Bolt hole 6 Joining plate 7 Precast concrete plate 8 Side sheet

Claims (1)

(57) [Claims] 1. A method for constructing a deep foundation pile retaining wall in which deep foundation piles constructed at predetermined intervals are joined by a retaining wall, wherein a liner plate constituting each of the deep foundation pile bodies is provided with a long and short side wall. The joint panels having the formed groove-shaped cross sections are integrally mounted, horizontal sheet piles are disposed between the long side walls of the adjacent joint panels, and a precast concrete wall is provided between the groove-shaped cross sections of the both joined panels. A method of constructing a deep foundation pile type retaining wall characterized by fitting both ends of a wall.