JPH08105122A - Simultaneous construction method for underground structure - Google Patents

Abstract

(57) [Abstract] [Purpose] Immediately after the construction of the retaining wall 1, the simultaneous construction of the above-ground structure A part and the below-ground structure B part can be started simultaneously. I will provide a. [Structure] First, the earth retaining wall 1 which is an underground continuous wall is constructed, and then the truss beam 3 is erected on the ground by connecting to the earth retaining wall 1, and thereafter, the above-ground structure A is constructed on the truss beam 3. The above-ground construction and the underground excavation in the retaining wall 1 and the underground construction for constructing the underground skeleton B are independently performed in parallel, and finally the above-ground skeleton A and the underground skeleton B are integrally combined.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a structure, and more particularly, to an improvement of a method of constructing a structure underground and underground by simultaneously separating the aboveground work and the underground work and proceeding in parallel at the same time. .

[0002]

2. Description of the Related Art Conventional methods for constructing underground structures above ground include a reverse construction method and a first-floor preceding construction method. In the reverse construction method, in parallel with the underground root cutting work, a permanent building structure such as beams and floors on the first floor is constructed, and this is used as mountain retaining support to the lower floors to the first basement floor and the second basement floor. It is a construction method in which root cutting and construction of the body are repeated in sequence.

The first-floor preceding construction method is a method of constructing a first-floor floor prior to underground root cutting work. All of the above construction methods are floor beams and cast-in-place piles on the first floor. After erection of a true pillar, underground excavation and construction of an underground structure will be performed, and then the above-mentioned steel erection will be started.

[0004]

However, after the floor beams, piles, and structural columns of the first floor are first built in this way, the conventional method of undertaking underground excavation, underground structure construction, and steel erection on the ground is started. Then, there is a problem that it is not so effective in shortening the construction period. Therefore, the present invention has been made to improve such conventional problems, and enables the construction of the above-ground portion and the underground portion to be started immediately after the construction of the retaining wall (underground continuous wall). The purpose is to provide a simultaneous underground and above-ground construction method for structures that can shorten the construction period.

[0005]

SUMMARY OF THE INVENTION The present invention for achieving the above object relates to a method for simultaneously constructing a subterranean ground of a structure, firstly constructing an earth retaining wall of a continuous underground wall and then connecting it to the earth retaining wall. After that, the truss beam is built on the ground, and thereafter, the above-ground work for constructing the above-ground structure on the truss beam and the underground work for constructing the underground excavation and underground structure inside the retaining wall are performed independently in parallel. The construction is carried out, and finally the above-mentioned skeleton and the below-ground skeleton are integrally connected.

[0006]

[Operation] A truss beam or the like is provided on the ground to shorten the construction period so that the construction of the above-ground portion and the underground portion can be separated and the construction can be started immediately after the construction of the retaining wall (underground continuous wall) is completed. Assemble the truss immediately after the construction of the retaining wall. Alternatively, during the construction of the retaining wall, it is assembled in another place in advance, and after the completion of the retaining wall construction, it is slid into a fixed position for installation.

The underground construction and the above-ground construction are carried out separately and docked at the final construction stage. During construction, the force from the ground is applied in the order of truss->wall-> support ground. Eventually, the underground and the ground will be docked, and the power will flow in the order of ground, underground, and supporting ground.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A construction procedure of an embodiment of the present invention will be described below with reference to the drawings. First step: Placing a retaining wall and excavating underground (Fig. 1). In this step, first, the retaining wall 1 is placed by the underground continuous wall method. This is to construct panels, which are the walls of the units, in sequence and connect them to form a continuous underground wall. The construction method is to excavate an element groove for each wall construction section, insert a reinforcing steel cage into the excavated element groove, and place concrete from the groove bottom. The panels thus constructed are joined together by a joint. The constructed retaining wall 1 serves as an underground outer wall.

After the construction of the retaining wall 1, the underground section 2 surrounded by the retaining wall 1 is excavated relatively shallowly. Second step: truss beam assembly (Fig. 2). The truss beam 3 is mounted on the constructed retaining wall 1. The truss beam 3 is a frame body formed by assembling the large beam 4 and the truss 5, as shown in FIG. The truss beam 3 may be mounted on the ground retaining wall 1 immediately after the construction of the mountain retaining wall 1 while assembling it, or the truss beam 3 that has been assembled in another place before the construction of the mountain retaining wall 1 in advance, After the construction of the mountain retaining wall 1 is completed, the mountain retaining wall 1 may be slid on and mounted thereon.

Next, the first-floor concrete 6 is poured into the first-floor portion where the truss beam 3 is constructed. As shown in FIG. 2 and FIG. 4, the brace 8 is attached to the second floor portion of the truss beam 3 in a partition portion that does not construct a ground frame, as necessary. After that, the second-floor concrete 9 is placed except for the section where the brace 8 is attached. However, if both ends of the truss are finally required (1F floor area> standard floor area), after the first floor concrete is placed, the second floor is also similarly placed.

Third step: erection of the skeleton on the ground and excavation of the underground (Fig. 5). The above-ground part is on the truss beam 3 installed on the ground in the previous process,
The erection of the skeleton of the above-ground structure A is performed on the second and third floors in order toward the upper floor. At the same time, in parallel, the underground section excavates the underground section 2 to a required depth. 4th step: above-ground building structure, underground building structure (Fig. 6).

Following the third step, the above-ground portion carries out the erection of the upper floor of the above-ground structure A. On the other hand, in the underground part (up to the second basement in the figure) where the excavation to the predetermined depth has been completed, piles 1
After the in-situ construction work (Fig. 6a) of No. 0 (Fig. 6a) or the mat slab construction work (Fig. 6b), the skeleton erection of the underground skeleton B including the construction of the true column 11 (which is the main steel column) is performed. During the steps from the second step to the fourth step described above, the load by the constructed above-ground structure A is transmitted in order from the truss beam 3 through the mountain retaining wall 1 to the supporting ground and received.

Fifth step: docking of the underground structure and the above-ground structure, and removal of some members of the truss part only when unnecessary (FIG. 7). Structural column 11 of underground structure B and steel column 12 of aboveground structure A
And are connected and become one. Subsequently, the truss beam 3 (FIG. 7) is removed only when it is unnecessary in the design. Subsequent loads from the skeleton will be transmitted and received in the order of ground, underground, and supporting ground. Thus, according to this embodiment, as in the conventional method of constructing beams, piles, and structural columns on the first floor and then excavating underground, or constructing a steel frame on the ground, the above-ground and underground works influence each other. There is no match and each work is independent and can be done in parallel at the same time.

[0014]

As described above, according to the method for simultaneously constructing underground structures above ground according to the present invention, after building the earth retaining wall of the underground continuous wall, the truss beam is built on the ground using the earth retaining wall. After that, while constructing the above-ground structure on the truss beam while unloading the weight to the supporting ground through the truss beam, excavation inside the mountain retaining wall and construction of the underground structure are performed in parallel with the ground work independently. Since the above-mentioned structure and the underground structure are finally integrally combined, the construction period can be significantly shortened.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a first step of the present invention.

FIG. 2 is an explanatory diagram of a second step of the present invention.

FIG. 3 is a plan view of the first floor portion of the truss beam of the present invention.

FIG. 4 is a plan view of the second floor portion of the truss beam of the present invention.

FIG. 5 is an explanatory diagram of a third step of the present invention.

FIG. 6 is an explanatory diagram of a fourth step of the present invention. (A) shows the case of pile driving, (b) shows the case of mat slab construction.

FIG. 7 is an explanatory diagram of a fifth step of the present invention.

[Explanation of symbols]

 1 Mountain retaining wall 3 Truss beam 10 Pile 10A Mat slab 11 Structural true pillar A Aboveground structure B Underground structure

Claims (1)

[Claims] 1. After constructing the earth retaining wall of the underground continuous wall, the truss beam is connected to the earth retaining wall and the truss beam is built on the ground, and thereafter, the construction of the above-ground part frame on the truss beam and the inside of the earth retaining wall. Underground simultaneous construction method for a structure, characterized in that underground excavation and construction of an underground structure are independently and concurrently performed, and finally the above-ground structure and the underground structure are integrally connected.