JPS59199995A - Construction of underground concrete structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention is a concrete structure in which concrete girders placed parallel to each other in and out of the ground are connected to each other in the direction perpendicular to the axis at several locations in the axial direction, so that the overload load is shared and the concrete supports are supported. Concerning construction methods for structures.

When constructing underground structures such as underground passages, gas roads, and delivery roads that intersect with railroads, roads, and existing buildings at three grade levels, it is necessary to construct vertical structures on both sides of above-ground structures. A vertical shaft is drilled, a propulsion machine with an auger is installed in the starting type pit, and a concrete girder of a predetermined length manufactured in a factory is fitted to the outline of the underground structure to be constructed. In various places, underground concrete structures are constructed by press-fitting them side by side, excavating the earth and sand inside them, and constructing underground concrete structures.

By the way, although the collectrete girders installed side-by-side by press-fit using conventional construction methods have considerable strength individually, they are not connected to each other and are designed to carry loads independently. Therefore, when subjected to a live load such as a moving train or automobile, the structure exhibits significant movement in response to the load, which may cause the structure to become unwell and reduce its durability.

This invention was devised to improve the above-mentioned problems, and at least the concrete girder parallel to the ceiling part.
1il11 are connected together at the same compound parent site, and Uke can hunt by dividing the superposition 5K in the valley, and 1l
The purpose is to obtain an underground structure rich in ir1 residence, and it consists of a substrate and a number of 1
A concrete girder with a square shape and a recessed groove along the longitudinal direction is constructed by placing a plurality of anchor materials made of whole or plate materials at predetermined intervals so that the base surface is located at the bottom. The required number of concrete girders are sequentially pressed into the ground through four pipes along the direction of the structure of the planned structure, and then the internal earth and sand are removed to ηI! After that, multiple anchors such as concrete beams parallel to at least the ceiling area are connected together by elongated steel beams, and formed by grooves on the sides of each beam. The entire feature is that the void is filled with concrete or mortar to maintain the function of distributing stress due to overload.

To explain the embodiment with reference to the drawings, in Figure 1A, 1 is a factory-produced concrete sill of the required length, with a corner J14 (no cross section, with an earth auger inserted in the center). It has a hole 1a and a hole in the center of both sides.
The cutting groove 1b of the required width is ′? 1), and there are silk handles 4 at the upper and lower positions sandwiching this recess 1b.
are planted on the left and right sides, and anchor materials 2 as described below are placed on the bottom at predetermined intervals in the 1iqij direction (longitudinal direction), i.e., with 1r (determined by Shizo's calculation). Multiple angles around the circumference.

The anchor material 2 is made by welding a plurality of rods or plate materials 2b erected on the upper surface of the substrate 2a, which is made of Oki J board or molded hook (Fig. When manufacturing girder 1, each erecting rod or t-mass 2
b was poured into the concrete instep, and the bottom surface of base 2a was carved. It is set so that the buttons are placed on the bottom of the button and the button direction is the same at the bottom of the button.

When burying such a concrete girder 1 in the target ground, a leading pipe 10 having a girder 111]-shaped cross section is fitted as shown in Fig. 2, and an earth auger 11 is inserted into the central through hole 1a. As mentioned above, the concrete girder 1 is dug and pressed into the ground from the starting shaft by a propulsion machine (not shown), but the concrete girder 1, which is the ceiling part that directly receives the live loads of trains and automobiles, is anchored by the anchor material 2. Press-fit the required number of screws in parallel in the horizontal direction as shown in Figure 3, with the screws facing downward. ii. At the part that contacts the wall, the anchor material 2 is blunted inward and then press-fitted in the vertical direction to form parallel pieces.

After a large number of concrete girders 1 are press-fitted and installed in parallel along the outline of the planned structure in this way, their ends are assembled into a gate shape at the starting shaft and the reaching shaft side. (not shown), and then excavate and remove the earth and sand inside.

After that, it is welded to the base plate 2a of car material aligned horizontally in multiple places on the bottom or side part of the concrete girder 1 that is parallel to the ceiling part or the inside part exposed underground, or is firmly fixed with bolts. Fixed to.

Thus, the horizontally juxtaposed concrete girders 1 are integrally connected to each other in the axial mantissa Ld skin.

Then, 11111 t+'r of each concrete girder 1
Filler material 5 made of concrete or mortar is injected into the gap formed by the concave grooves 1b provided at i, and is hardened to absorb the shearing force on each girder while at the same time absorbing the compressive stress due to bending. Hold on, the +i you formed earlier,
The stress caused by the overload is distributed by the joint action with the II long steel plate, etc.

In addition, regarding the concrete girders 1 vertically parallel to the side wall part, the voids formed by the grooves 1b of each girder are filled with concrete or mortar as described above, but each anchor material 2 is not necessarily connected with a steel plate. There's no need.

As described above, in the present invention, anchor materials are fixed at a plurality of locations at the bottom of a concrete girder, and via the anchor materials, each of the girders arranged in parallel to the ceiling portion is integrally connected at a plurality of locations in the axial direction, and each Since the voids formed between the girders are filled with concrete or mortar, the upper load can be shared between each girder, and a highly durable structure can be obtained. The anchor material can still be assembled at the time of manufacturing the concrete sill, which saves time and effort.

[Brief explanation of drawings]

Figure 1A is a perspective view of a part of the concrete girder. The opening of the figure is a 14-square drawing of the A-A Enoki. Figure C is a perspective view of the anchor material. Figure 2 shows the concrete girder and the ground auger.
Fig. 3 1 is a cross-sectional view of the underground structure in the installed state. Figure 4 is a perspective view of the concrete girder parallel to the ceiling area, viewed from below.

Claims (1)

[Claims] Anchor materials consisting of a substrate and a plurality of rods or plates bent and erected on the substrate are placed at predetermined intervals in a rectangular shape and housed in one longitudinal direction on the side surface, with the bottom surface of the anchor material positioned at the bottom. Form a concrete girder with a concave groove M, and then press-fit the required number of concrete girders into the ground along the edge of the planned structure via a leading pipe, and then press-fit them in parallel.
Next, the earth and sand inside is excavated and removed, and then the multiple anchor materials of each concrete girder that are parallel to at least the ceiling part are connected together with elongated steel plates, etc., and a groove is formed on the side of each girder. A construction method for an underground concrete toy structure characterized by filling voids with concrete or mortar.