JPH0788699B2 - Body construction method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a skeleton construction method for a steel-framed reinforced concrete building having a basement floor, and more particularly to a basement floor outer shell preceding construction method.

“Problems to be solved by conventional techniques and inventions” Recently, there is an increasing demand for a short construction period for the construction period of a building, and a building having a basement floor is no exception.

In order to meet this demand, improvement of the construction method is indispensable, and in particular, sufficient examination is required for the construction method of a high-rise or super-high-rise building accompanied by large-scale or deep-depth excavation.

Conventionally, the reverse construction method and the semi-reverse construction method (improved reverse construction method) have been adopted as the short-term construction method for this type of building, including the improvement of safety. is necessary.

In addition, this structure column has relatively few problems when the foundation type is a pile foundation, but when it is a direct foundation, a structure column stake is required, which is cost, construction period, and foundation settlement. Since there are disadvantages, it is desirable to establish a short-term construction method that directly utilizes the basic form.

The present invention seeks to meet this need.

"Means for Solving the Problems" In order to achieve the above-mentioned object, the invention of claim 1 is
After assembling the subway bones, the outer shell of the underground skeleton is pre-constructed, and then the skeleton construction of the underground floor and the steel skeleton assembly and skeleton construction of the ground floor are performed in parallel.

In addition, the invention of claim 2 is that, after the subway bone is assembled, the outer peripheral pillars / beams / walls and the floors / beams on the first floor above the outer shell of the underground structure are constructed first, and then It is characterized by using the floor of the floor as a work floor and paralleling the skeleton factory on the basement floor with the steel frame assembly and skeleton construction on the ground floor.

"Operation" In any of the inventions of Claims 1 and 2, the outer shell of the underground skeleton that has been constructed in advance enables the multi-story parallel construction of the ground floor and the basement, and the construction Horizontal force of wind, earthquake, etc. applied to the ground floor inside is transmitted to the ground through the cliff wall to ensure a stable and safe condition even in the case of multi-story parallel construction.

Further, in the invention according to claim 2, the floor on the first floor above the ground, which was previously constructed as the outer shell, can be used as a working floor.

"Embodiment" FIG. 1 shows an embodiment of the body construction method according to the inventions of claims 1 and 2.

Hereinafter, the steps I to V will be sequentially described.

I Construction of a retaining wall In the ground, a retaining wall 1 that fits the underground outer wall of the building is constructed.

The type of the mountain retaining wall 1 may be suitable for the ground condition and the support work condition. It may be one having a high rigidity such as a continuous wall, or one having a relatively low rigidity such as a soil column wall or a horizontal H-shaped steel sheet pile. In particular, in the case of a mountain stop wall with relatively small rigidity,
Highly effective in leading the outer shell.

II Repetition of excavation and support work Excavation and support work are performed on the inside of the retaining wall 1, and the foundation ground is sequentially dug down to complete root cutting.

For the support work, the earth anchor method or the beam method shown in the figure is used. In the case of the earth anchor construction method, since a plurality of anchors 2 may be appropriately penetrated into the ground, workability is high.

The uprising 3 is an RC (reinforced concrete) upholstery that uses the underground wall of the main construction, and is used for the main construction as it is.

If the pillars, beams, and walls of the basement outer wall of the permanent construction are RC, it is also possible to perform reverse strike in parallel with excavation.

In addition, the required entry platform 4 is temporarily installed.

III Foundation Casting-Subway Bone Assembly-First Floor Floor, Beam Leading Casting Foundation 5 is cast, the bottom support structure is dismantled, and subway bone 6
The erection and final tightening of the
The wall 7 is placed in advance (it is possible even after the first floor above the floor and the beam is placed), and the floor and beam 8 on the first floor above is placed in advance.

Thus, on the first floor above the ground, a large work space is secured and the dismantling of the entrance gantry 4 is obtained at an early stage.

IV Completion of Underground Outer Shell and Parallel Work of Aboveground and Underground Layers Underground outer shell, namely foundation 5, floor / beam 8 on the first floor above ground, pillars / beams / walls 7 on the outer periphery of the underground, and then underground skeleton 9 Performs multi-layer parallel work on the above ground steel frame 10.

At this time, horizontal force due to wind, earthquake, etc. will be applied to the above-ground steel frame 10, but this horizontal force is the floor / beam 8 on the first floor above the ground, pillars / beams / walls 7 on the outer perimeter of the ground, and retaining walls. It is transmitted to the ground through No. 1 and, therefore, the frame becomes stable against horizontal force during construction.

V Parallel work on the ground / underground structure Multi-layer work on the underground structure 9 and the ground structure 11 is performed. Especially when the high-rise part is a steel frame structure, Pca
(Precast concrete) A slab 12 is built and a three-step parallel work is performed.

If the high-rise part is made of steel frame, the construction speed on the ground floor will be faster, and the horizontal force will also be large, but since it is transmitted to the ground as described above, stability can be secured.

"Effect of the invention" According to the inventions of claims 1 and 2, neither the construction column nor the pile for erection of the construction column is required, and the construction work can be done in a short period of time by taking advantage of the direct foundation type. Therefore, by the preceding construction of the outer shell of the underground skeleton, the skeleton construction of the later underground intermediate floor and the steel frame assembly and skeleton construction of the ground floor can be performed in parallel without any trouble, and the construction period is greatly shortened. The cost can be reduced.

In addition, by preceding construction of the outer shell of the underground structure, horizontal force such as wind and earthquake applied to the ground floor under construction can be appropriately transmitted from the outer shell to the ground through the mountain retaining wall,
Even in such multi-story parallel construction, stability and safety during construction can be secured.

Further, according to the invention of claim 2, since the first floor above the ground is constructed as the outer shell in advance, the floor can be used as a work floor, and the entry gantry can be disassembled at an early stage, and further The construction period can be shortened and the construction can be facilitated.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a construction procedure according to an embodiment of the present invention. 1 ... Mountain stop wall, 2 ... Earth anchor 3 ... Raised, 4 ... Entry pedestal 5 ... Foundation, 6 ... Subway bone 7 ... Pillars / beams / walls around underground 8 ... Ground Floors and beams on the first floor 9 …… Underground structure, 10 …… Overground steel frame 11 …… Overground structure, 12 …… Pca version

Claims (2)

[Claims] 1. A skeleton construction method, characterized in that after assembling a subway bone, an outer shell of an underground skeleton is pre-constructed, and then a skeleton construction on the basement floor and a steel frame assembly and skeleton construction on the ground floor are performed in parallel. 2. After assembling the subway bone, the outer peripheral columns / beams / walls of the underground structure and the floors / beams on the first floor above ground are pre-constructed, and then the floor on the first floor above is used as a work floor. Then, the skeleton construction method is characterized in that the skeleton construction on the basement floor and the steel frame assembly and skeleton construction on the ground floor are performed in parallel.