JP2700769B2 - Construction method of box-shaped building - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing an underground box-shaped building by propelling a submersible box.

[0002]

2. Description of the Related Art As an underground box-shaped structure, for example, a box-shaped structure below the surface of a garage having a plurality of layers is conventionally driven by driving a steel sheet pile to a predetermined depth so as to surround a predetermined ground as shown in FIG.
It is formed by excavating and carrying out internal soil and suspending a precast concrete box member, or casting concrete in place.

[0003]

However, the driving of a large number of steel sheet piles surrounding a predetermined area has the problem of giving noise and severe vibration to the surroundings, deteriorating the environment, and increasing the construction time and cost. was there.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a front and rear end member formed of concrete is provided with earth retaining plates on both outer sides, assembled in a rectangular frame shape, and submerged under the ground, Next, the front end member is unloaded onto the surface of the ground, and a thrusting means is assembled on the front surface of the rear end member for propelling the soil plate on both sides by a retractable stroke of a jack, and the rear end member is supported. A concrete intermediate member is suspended in a gap formed on the rear side of the propulsion means for each fixed propulsion with the retaining plate of the propulsion means, and when the intermediate member reaches a predetermined number, the intermediate member is attached to the front retaining plate. The propulsion means is carried out by retaining the front surface in the propulsion direction, and the front end member carried out on the ground is suspended on the front surface of the intermediate member, and a plurality of intermediate members are provided between the front and rear end members. By constructing an underground box-shaped structure connecting It is intended to Kesshiyo.

[0005]

According to the present invention, the front and rear end members assembled in a rectangular frame shape are laid down under the surface of the ground using the latent box method, and then the front end member is replaced with propulsion means to replace the rear end member. By the propulsion with the retaining plate on both sides of the propulsion means as the support, the intermediate member is sequentially hung on the rear side of the propulsion means to construct a box-shaped structure having a predetermined length under the ground.

[0006]

An embodiment will be described below with reference to the drawings.

A lower member 11a of the rear end member 11 and a lower member 12a of the front end member 12, each having a rectangular shape and forming a front portion and a rear portion of a rectangular box, are formed into an assembling jig 13. , 13 are sandwiched and assembled in a rectangular frame shape, and the lower plates 14a, 15a of the retaining plates 14, 15 are temporarily fixed to the outer sides on both sides thereof by applying bolts or the like, and the internal soil is removed from the surface of the ground. The submarine is sunk while being carried out. The lower member 11a,
The inner surface at the lower end of 12a is tapered to make it easier to cover.

Each time the lower members 11a and 12a sink to a certain depth, the middle members 11b and 12b, 11c and 12c, and the upper members 11d and 12d are similarly stacked and connected while being assembled in a rectangular frame shape, and the earth retaining members are simultaneously placed. Intermediate plates 14b, 15
b, upper plates 14c, 15c are replaced with lower plates 14a, 15a of the earth retaining plate
The rear end member 11, the front end member 12, and the retaining plate 14,
At 15, a start pit 17 is formed which surrounds all sides and makes the inside hollow.

Next, the temporary fixing between the earth retaining plates 14 and 15 is released, and the front end member 12 is lifted together with the assembling jigs 13 and 13 and carried out to the surface of the ground. Is fixed by grouting or the like, and a frame or the like constituting the propulsion means 18 is loaded into the front surface of the rear end member 11 and assembled.
15 and integrated therewith, to form a propulsion means 18 for propelling the earth retaining plates 14 and 15 together.

Reference numeral 19 denotes a hydraulically operated jack which constitutes the propulsion means 18 and is attached to the rear of the propulsion means 18 from the rear.
The propulsion means 18 is advanced by a predetermined width together with the retaining plates 14 and 15 by the extension of the jack 19 supported by the side end surface 20 and the excavation of the front soil from the surface of the ground so as to be in contact with or separated from the side end surface 20. Let it do. The earth retaining plates 14 and 15 have a reinforcing member 21 attached to an intermediate inner surface, and a tapered inclined surface 22 is provided at an inner front end thereof, and a rotatable roller-shaped seal packing 23 is interposed at a rear end to facilitate advancement. I have.

When the propulsion means 18 and the retaining plates 14 and 15 advance at a certain width while preventing the collapse of the soil walls on both sides by extension of the jack 19, the jack 19 is moved to the propulsion means 1
8 and concrete is thinly poured on the front bottom surface of the rear end member 11 and the inner bottom surface of the rear end member 11 generated by the contraction of the jack 19 to form a level concrete surface 24. Then, an inverted U-shaped concrete intermediate member 25 having both side plates and a bottom plate having the same width as the end member 11 is suspended in the gap between the rear end member 11 and the jack 19 and the rear end member. A bottom plate 26 having the same thickness as the bottom of the intermediate member 25 is cast by concrete on the leveled concrete surface 24 on the inner bottom surface of the rear end member 11.

Next, the tip of the jack 19 is applied to the front end face of the connected intermediate member 25 to extend the jack 19 again to advance the propulsion means 18 and to form a gap between the jack 19 and the intermediate member 25 by contraction. The intermediate members 25 are sequentially suspended and connected in a manner similar to that described above. After the predetermined number of intermediate members 25 are suspended and connected, the front retaining plate 27 is inserted between the front portions of the retaining plates 14 and 15 and the front soil is connected. And the propulsion means 18 is disassembled and carried out on the surface of the ground, and the front end member 12 which has been carried out is suspended and connected to the intermediate member 25, and is also placed on the inner bottom surface by concrete. A box-shaped structure 28 having an open top surface having a predetermined length by hitting the bottom plate 26
To build Thereafter, the front retaining plate 27 and the retaining plates 14, 15 on both sides are dismantled and carried out, and the surroundings are backfilled with excavated soil.

The underground depth of the underground box-shaped structure 28 can be freely changed by adjusting the number of stacked front and rear end members and the height of the intermediate member to the number of stacked members. In addition, the upper opening is closed by assembling a concrete upper plate.

[0014]

As described above, according to the present invention, an underground box is constructed by using both the submersible submersion method and the propulsion method, so that the construction eliminates noise and vibration and greatly shortens the construction period. This has the effect of being able to

Since the propulsion means is propelled together with the earth retaining plates on both sides, the effect of eliminating the occurrence of soil collapse on both sides during the propulsion and stably propelling is obtained.

Since the propulsion of the propulsion means is carried out by supporting the rear end member to be laid, there is an effect that no additional support means for propulsion is required.

When the front and rear end members and the earth retaining plates on both sides are divided into a plurality in the horizontal direction and stacked and connected, each member is reduced in size to facilitate handling such as transportation. It is possible to reduce the size of the equipment for lowering and pressing for concealment, thereby simplifying installation and dismantling work, and it is possible to freely change the immersion depth by increasing or decreasing the number of stacks.

[Brief description of the drawings]

1A and 1B are a plan view and a side sectional view of a step of submerging a starting pit according to an embodiment of the present invention.

2A and 2B are a plan view and a side sectional view showing a process of assembling and attaching a propulsion means.

FIGS. 3A and 3B are a plan view and a side sectional view showing a step of suspending an intermediate member in a gap generated by propulsion of a propulsion unit and contraction of a jack.

4A and 4B are a plan view and a side sectional view showing a step of inserting a front retaining plate, carrying out a propulsion unit, and hanging and connecting a front end member.

FIG. 5 is a perspective view showing front and rear end members and an intermediate member.

FIG. 6 is a diagram of a conventional example.

[Explanation of symbols]

 11 is a rear end member 12 is a front end agent 11a, 12a is a lower member 11b, 12b, 11c, 12c is a middle member 11d, 12d is an upper member 13 is an assembly jig 14, 15 is a retaining plate 14a, 15a Is a lower plate 14b, 15b is a middle plate 14c, 15c is an upper plate 16 is a tapered slope 17 is a starting pit 18 is a propulsion means 19 is a jack 20 is a side end face of a rear end member 21 is a reinforcing member 22 is a tapered slope 23 is a seal packing 24 is a level concrete surface 25 is an intermediate member 26 is a cast-in-place concrete bottom plate 27 is a front retaining plate 28 is an underground box-shaped structure

Claims (2)

(57) [Claims] 1. A front end member and a rear end member made of concrete are arranged in a rectangular frame shape with earth retaining plates disposed on both outer sides, and are submerged under the surface of the ground. Assembling propulsion means for carrying the ground plate together on both sides by the expansion and contraction stroke of a jack on the front surface of the rear end member after being carried out on the ground surface, and attaching the earth plate of the propulsion means supporting the rear end member. A concrete intermediate member is hung in a gap formed on the rear side of the propulsion means at every accompanying constant propulsion, and when the number of the intermediate members reaches a predetermined number, a front retaining plate is used to divert the front surface in the propulsion direction. An underground box-shaped structure in which a plurality of intermediate members are connected between the front and rear end members by hanging the front end member carried out on the ground surface and hanging the front end member carried out on the surface of the intermediate member. A method for constructing a box-shaped building, comprising building an object. 2. The method according to claim 1, wherein the front and rear end members and the earth retaining plates on both sides are horizontally divided into a plurality of pieces and stacked and connected to each other.