JPH05230846A - Construction method of underground structure by reverse-placing construction method - Google Patents

Abstract

PURPOSE:To enable the construction of an underground part to be the lower floor than a previously constructed top slab and a part excluding a part right under the opening part of the top slab in the constructing direction of an underground structure by a reverse-placing construction method, thereby improving constructing performance and attaining the labor-saving and safety of work. CONSTITUTION:After constructing land slide protection walls 10 and piles 11 in a reverse-placing construction method, jury struts 12 are constructed therein, and a top slab 13 is constructed after the termination of primary drilling. Carriers A with carrier bases provided with horizontal rotating mechanism 2, push-up inclining mechanism and self-position detecting mechanism 3 are lowered to the bottom part of a drilled part from the top slab 13. Beam members made of PC and semi-PC, and floor members are then conveyed by the carriers A and fitted to the jury struts 12.

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 structure by a reverse driving method.

[0002]

2. Description of the Related Art In constructing an underground structure by the reverse driving method, a mountain retaining wall and piles are constructed, then temporary columns and construction columns are installed, and after the first excavation, a top slab is constructed first. An excavator is put into the excavation section through the opening of the top slab to construct the structure of the underground section to descend. When constructing a structure using factory-produced members such as steel frame members, PC members, and half-PC members, construction is performed by a lifting machine such as a crane.

[0003]

In the reverse construction method in which the top slab is constructed in advance to construct the above-ground and underground structures, the construction of the underground portion below the top slab is performed under the top slab. Since there is no horizontal transportation means in the above, it was impossible to construct except the part directly under the top slab opening. Also, the structure below the gantry could not be constructed for the same reason. Therefore, if a small crane is introduced for the work of attaching the members, the construction can be performed, but since it is difficult to hold the load stationary, it is impossible to attach the load at an accurate position, and thus it is difficult to perform the automated construction.

The present invention has been proposed in view of the problems of the above-mentioned prior art, and the purpose thereof is to provide an underground construction by the reverse driving method which improves the workability, saves labor and makes the work safer. The point is to provide a method for constructing a structure.

[0005]

In order to achieve the above-mentioned object, according to the method for constructing an underground structure by the reverse striking method according to the present invention, in the method for constructing an underground structure by the reverse striking method, a mountain retaining wall, After constructing the piles, constructing the columns, and after constructing the top slab after the completion of the primary excavation, a horizontal rotation adjustment mechanism, a push-up tilt mechanism, from the top slab to the bottom of the excavation part,
After lowering a transportation vehicle equipped with a transportation platform having a self-position detecting mechanism, the transportation vehicle transports the beam member and the floor member and attaches them to the columns.

[0006]

Since the present invention is constructed as described above,
After finishing the first excavation and constructing the top slab, the beam member, floor member, etc. are supported on the work carriage on the bottom of the excavation from the lift on the ground through the opening of the top slab, and the work carriage is specified. It is conveyed horizontally to a position and is attached to a predetermined position of the pillar by a horizontal rotation adjusting device, a lifting and tilting mechanism, etc., and a signal from a position pointing device provided in each part of the structure is received by a self-position detecting mechanism. However, it recognizes one's position while driving and enables accurate construction work of the basement floor.

[0007]

The present invention will be described below with reference to the illustrated embodiments. A is a transport vehicle, which is a shock absorber device for preventing excessive vibration or shaking that may cause harmful cracks or the like on a traveling carriage composed of a low ground pressure type crawler 1 traveling on an excavated ground surface (Fig. (Not shown) is attached.

The crawler 1 is provided with a horizontal rotation mechanism 2 configured to rotate the load horizontally one rotation with respect to the traveling direction in order to pass between the columns, and position indications provided at various places of the structure. A self-position detecting mechanism 3 that receives a signal from the device and recognizes a self-position during traveling, a horizontal fine adjustment mechanism 4 that shifts the load in two horizontal directions orthogonal to each other to mount the load at an accurate position, and the load at a predetermined position. For mounting, a lifting / tilting mechanism 5 consisting of two pairs or a plurality of jack devices by hydraulic pressure capable of pushing up or tilting, and a supporting mechanism for preventing displacement and drop during transportation or when the loading platform is tilted during mounting. 6 is provided.

In the figure, 7a and 7b are an X direction position indicating signal transmitting device and a Y direction position indicating signal transmitting device which are arranged on the mountain retaining wall and the pillar. 10 is a retaining wall. Hereinafter, as an underground structure, an example in which a beam and a floor are a PC beam and a half-PC floorboard, respectively, when a basement floor of an RC structure of a building is constructed by the reverse construction method will be described with reference to the drawings.

After forming the mountain retaining wall 10 and the cast-in-place pile 11, the temporary support columns 12 are installed, and after the first excavation, the top slab 13 is constructed. Half PC with scaffolding for construction of beam-column joints
The beam 14 is moved by the ground crane 15 to the transport vehicle A on the ground floor.
The PC beam 14 is transferred to a predetermined position in. The transport vehicle A loaded with the same half PC beam 14 transports the excavated ground surface to the PC beam mounting position while confirming its own position via the self position detection mechanism 3. During this time, the half-PC beam 14 is horizontally rotated through the horizontal rotation mechanism 2 so as to avoid the column and be conveyed to a predetermined position.

The transport vehicle A that has reached the predetermined position is a half-PC beam 1.
The horizontal and vertical inclinations and heights of 4 are the horizontal rotation mechanism 2,
The half-PC beam 14 is adjusted to the installation portion protruding from the temporary support 12 by adjusting the horizontal fine adjustment mechanism 4 and the lifting / tilting mechanism 5.
Set up. In the same manner as above, the half-PC floor board 16 is transferred from the above-ground crane 15 to a predetermined position and attached, and the scaffolding preceded by the half-PC beam 14 is used as a work floor. And the reinforcement work on the beams 14 and the floor board 16. Furthermore, around the beam-column joints and floorboard 1
Concrete is placed on 6 to build an underground structure.

Although an overhead traveling crane is used as the ground crane in the illustrated example, a mobile crane may be used as long as it suspends members. 4 to 8
Indicates the transportation and mounting state of the PC beam 14 by the transportation vehicle A,
4 and 5 are front views and plan views, respectively, at the time of conveyance, and FIGS. 6 and 7 are side views and front views, respectively, when the PC beam is attached. FIG. 8 is a front view when a plurality of transport vehicles A are used.

FIGS. 9 to 15 show a half P by a carrier vehicle A.
FIG. 9 shows a front view at the time of transfer, FIG. 10 shows a horizontal rotation state at the front view at the time of mounting, FIG. 11 shows a horizontal movement to the left and an inclined support state, and FIG. FIG. 13 shows a rightward horizontal movement tilt support state, FIG. 13 shows a push-up right tilt horizontal movement state, and FIG. 14 shows a push-up left horizontal movement state.
Reference numeral 5 shows the state of compression and attachment to the beam 14.

[0014]

According to the present invention, since the vehicle for the basement floor constituent members set from the top slab to the bottom of the excavation section has the functions of horizontal rotation, push-up inclination, and self-position detection, the underground driving method is used. When constructing a structure, it is possible to construct a structure below the top slab or below the gantry, and the transportation and installation work of beam members and floor members can be performed automatically or remotely by accurate position control. Therefore, labor saving and work safety can be achieved. Further, since the transport member by the transport vehicle can be held stationary, the joint construction can be immediately started, and by mounting the beam member and the floor member while supporting them from below, slinging work is eliminated and workability is remarkably improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an implementation state of an embodiment of a method for constructing an underground structure by a reverse driving method according to the present invention.

FIG. 2 is an arrow view of FIG.

FIG. 3 is a side view of a carrier vehicle.

FIG. 4 is a front view showing a state during transportation by a transportation vehicle.

FIG. 5 is a plan view of FIG.

FIG. 6 is a side view showing a state when a member is attached by the transport vehicle.

FIG. 7 is a front view of FIG.

FIG. 8 is a front view showing a state in which a plurality of transport vehicles are mounted.

FIG. 9 is a front view showing a state when the half PC floorboard is being conveyed.

FIG. 10 is a front view showing a state of FIG. 9 during horizontal rotation.

FIG. 11 is a front view showing a state in which the half PC floorboard is moved horizontally to the left and is supported obliquely.

FIG. 12 is a front view showing a state in which the half PC floorboard is horizontally moved to the right and is supported in an inclined manner.

FIG. 13 is a front view showing a state in which a half-PC floor board is pushed up and horizontally moved to the right and inclined.

FIG. 14 is a front view showing a state in which a half PC floorboard is pushed up and horizontally moved to a left tilt.

FIG. 15 is a front view showing a state where the half PC floorboard is pushed up and leftward is horizontally moved.

[Explanation of symbols]

 A transport vehicle 1 crawler 2 horizontal rotation mechanism 3 self-position detection mechanism 4 horizontal fine adjustment mechanism 5 push-up / tilt mechanism 6 support mechanism 7a X-direction position indication signal transmitter 7b Y-direction position indication signal transmitter 10 mountain retaining wall 11 cast in place Piles 12 Temporary columns 13 Top slabs 15 Ground cranes 16 Half PC floor boards 17 Beams 18 columns

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiichi Shibayama 4-6-15 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd.

Claims (1)

[Claims] 1. In the method of constructing an underground structure by the reverse driving method, a mountain retaining wall and piles are constructed, and then columns are installed, 1
After finishing the next excavation, after constructing the top slab, lower the transport vehicle equipped with the horizontal rotation adjusting mechanism, the push-up tilting mechanism, and the self-position detecting mechanism at the bottom of the excavating part from the top slab, and then transport the same. A method of constructing an underground structure by a reverse construction method, characterized in that a beam member and a floor member are transported by a vehicle and attached to the pillar.