JPH01263334A - Core part precedence type construction method - Google Patents

Abstract

PURPOSE:To shorten the construction period and economize the construction cost by previously executing the steel frame construction and body construction for a core part to the uppermost floor by using a tower crane and executing the steel frame construction and the body construction for an outer shell structure part by using the tower crane. CONSTITUTION:A tower crane 1 is installed at a core part A, and the steel frame construction and body construction for the core part A are executed to the uppermost floor by using the tower crane 1, and the outer peripheral part steel frame construction and outer peripheral part body construction for an outer shell structure part B are executed by using the tower crane 1. The steel frame pillar 3 of the core part A is erected through the joint with the steel frame of a supporting pile, and the construction of the core part A on the ground, pit excavation, body construction for the underground floor structure part D are executed in parallel. Therefore, the number of used tower cranes 1 can be economized, and the previous utilization of the installation of an elevator, toilet, and staircase, etc., for the main construction in the core A is permitted, and the temporary construction cost can be economized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention provides a relatively lightweight structure with a relatively light but not very large load-bearing capacity, which is constructed by surrounding steel columns, beams, wall plates, etc. on the outer periphery of a core part of a strong and heavy load-bearing structure. The present invention relates to a core-first construction method used in the construction of high-rise and ultra-high-rise buildings in which a shell structure (also called a bearing wall structure) is constructed in a composite manner.

Conventional Technology Conventionally, in the construction of high-rise and super-high-rise buildings, regardless of their structure, the so-called layered construction method has been generally used, in which the structure of each floor is built up in sequence from the ground floor to the second floor. It has been implemented. In this case, the normal procedure is to begin construction of the underground steel frame after the underground structure work is almost complete.

Problems to be Solved by the Invention For example, as shown in the plan view in Fig. 6, a large-scale high-rise building with a composite structure of a core part A and outer shell structural parts B, B is constructed using the conventional layered construction method. In this case, two large tower cranes with a maximum working radius of io 1-1 and a maximum lifting load of 18 tons are usually required. The I- has a lifting capacity of 101- at the maximum working radius.
About two small C2 cranes are also required, and it is customary to use a total of four cranes to cover the entire building surface during construction.

This is because when using the layered construction method, material storage must be located within the premises (open space) around the building, and therefore the working radius of the crane is likely to be large.
The lifting load of cranes is limited in inverse proportion to the working radius. - On the other hand, the large heavy steel frame that makes up core section A must be suspended from the site around the building's periphery within a large working radius, and for this reason, the weight of each core section steel frame must be reduced to about 10 tons or less. Lifting becomes impossible. As a result, the number of joints in steel frames, etc. increased, and the number of joints increased.

In addition, the center of rotation o1 of the large tower crane c1 must be selected at a V-diameter position where the large heavy steel frame of the core section A can be lifted from the outer periphery of the building, and the position is inevitably limited. The shortfall must be covered by small crane C2. Therefore, there is a drawback that the number of cranes increases. Of course, it is possible to reduce the number of cranes by using a super-large tower crane, but if a tower crane larger than a general-purpose model is used,
-1- The construction costs are not profitable when the usage fees are high. Therefore, as shown in Figure 6, an inexpensive small crane C
Usually, you can make do with using 2 together. but,
In this way, when a large number of cranes 1/-c1 and c2 are used for 1 Jl, in the working range where the crane boom or ball is aligned,
In practice, this is always troublesome on the J1, as you have to organize the work order exactly in front of the car and make arrangements to avoid the risk of the boom colliding.

In addition, conventional lamination--Large tower crane C under the Act
As illustrated in FIG. 6, the center of rotation o1 of the rotor 1 is generally located outside the core portion A, that is, within the outer shell structure portion B having low proof stress. For this reason, special reinforcement is often required to support the tower crane mast.
The problem is that it takes time and money.

Furthermore, in the case of the conventional layered construction method, the usual procedure is to first complete the underground structure work and then start the underground steel frame work, which makes it impossible to wrap the process (parallel construction). Shortening has become a bottleneck.

Therefore, an object of the present invention is to reduce the actual number of lynes required by dividing the lifting capacity of lynes into large and small working radii and use them efficiently; By installing the crane in the core area, which has a large core area, the crane mast can be supported in just one minute.Also, by constructing the core area in advance, it is possible to eliminate the need for equipment, toilets, elevators, etc. that are concentrated in the core area. It is an object of the present invention to provide a core part advance construction method that has been improved so as to enable early start, shorten the construction period, and improve safety.

Means for Solving the Problems 1-4 As a means for solving the problems of the prior art,
As shown in preferred embodiments in FIGS. 1 to 5 of the drawings, the core-based construction method according to the present invention includes steel columns, beams, and walls on the outer periphery of the core portion A, which has a strong load-bearing structure. In a construction method for high-rise and super high-rise buildings in which an outer shell structure part B made of boards or the like is constructed in a composite manner, a tower crane 1 is installed in the core part A, and the tower crane 1 is used to move the core part 1. Steel frame erection and core structure work will be carried out up to the Lth floor in advance, and then the outer peripheral steel frame construction and outer peripheral structure work of outer shell structure portion B will be carried out using the tower crane 1. Features.

In addition, in the above-mentioned core part advance construction method, core part 1
The steel frame column 3 was built by connecting it with the steel frame of the support pile, and the construction of the core part l on the ground, the root cutting work, and the structural part C of the basement F floor were carried out.
It is also characterized by the fact that it is carried out in parallel with the construction of.

Since the tower crane 1/-1 is installed in the working core part A, the mast of the tower crane 1 is firmly supported by the core part A, which has a large bearing capacity, and reinforcement for supporting the crane mast is... Not desperately needed.

Steel frame erection of core part A and core part frame] ``Because the work is carried out independently before and independently of the outer shell structure part B, the materials of the core part A are the same as those of the outer shell structure part B, which should be on the outer periphery of the core part A. It is possible to place it at a position within a plane and lift it with the tower crane 1. Therefore, the materials of the core part A can be lifted within a relatively small range of the working radius of the tower crane 1, and its 917 One piece of steel frame can be suspended as a fairly large and heavy piece.Therefore, the number of joints of steel frames etc. at high places can be reduced.

On the other hand, when constructing the outer steel frame and constructing the outer frame, which is the outer shell structure part B, the materials must be placed on the outer site (open space) of the building plane, but the outer steel frame and the 1m outer frame members Since it is originally one piece or relatively small in size, there is no particular problem in lifting it with a tower crane in a large working radius.

In short, the tower cranes 1 can be used efficiently depending on their lifting capacity and working radius, so that the number of tower cranes 1 can be reduced while still being a general-purpose machine. As a result, the working range in which the booms overlap is small (FIG. 5), and there are few tasks in which the booms overlap, increasing the degree of freedom in the work order and the safety of the work.

Next, the ground IL steel frame work and underground structure work for core part A can be done in parallel and can be started during the rainy season, so 1"U
It is possible to shorten l. In addition, since there is a large time lag between the work schedule for the core part A and the outer shell structure part B, it is important to ensure that materials are brought in, managed, and stored in a well-organized manner, resulting in mistakes and time loss due to confusion. can be prevented.

In the core part A, which was constructed in advance, construction work such as toilets, equipment, elevators, stairs, etc., which would take a long time to construct, could be completed in the first stage, and these could be put to practical use. Early dismantling of the lift is possible.

Example The illustrated invention will now be described in detail.

1 to 4 show important process diagrams of the core-advanced construction method according to the present invention.

First of all, Fig. 1 shows that after the construction of the continuous underground wall 6 (see Fig. 2) for supporting piles and mountain retaining, the steel frame of the core part A is erected using crawler rough 1/-2 on the ground. This figure shows the initial stage of installing a large tower crane in Section A. As shown in the working plan view in Fig. 5, the tower crane 1 is installed so that two units can cover the lifting work of the entire plane of the building, and with its rotation center 01 located within the core part A. There is.

The steel column 3 of the core part A is connected to the steel frame of the support pile. Since this core part A is structurally constructed of a large heavy steel frame and has a very high strength, no special reinforcement is required for supporting or climbing the mast 1a of the large tower crane 1.

Figure 2 shows that while the tower crane 1 is being used to proceed with the erection of the steel frame of the core section A and the construction of the core section, at the same time, root cutting work is being carried out using the Taramsiel 4, backhoe 5, etc., and the underground floor This shows the stage in which the construction of the main body is proceeding in parallel. Unpublished works will also be held. 6 in the diagram
This is a continuous underground wall that was constructed to serve both as the building frame and as a retainer.

FIG. 3 shows the stage where the tower crane 1 is used to climb the structure, and the steel frame is erected to the core section and the core section construction work is completed up to the second floor. In this case, the ground
The floor 7 of the outer shell structure part B, which corresponds to the 1st to 3rd floors, will be used as a material storage area, and the structural materials of the core part A carried into this area will be hoisted up by the tower crane 1 to construct the core part A. work is being done. Therefore, the tower crane 1 is used for lifting operations with a relatively small working radius, up to i s +
The weight of each piece of steel frame can be large, since the lifting capacity can be expected to be approximately 100-1000 yen. Therefore, by assembling one piece into a large piece on the ground, it is possible to reduce the number of joints and reduce the number of joints required for work at high places.

In addition, since the space 9 under the floor 7 of the outer shell structure part B on the J-3rd floor is configured as a large passageway for materials M transport trucks, etc., the space 9 under the floor 7 of the outer shell structure part B on the J-3rd floor is configured as a large passageway for materials M transportation trucks, etc. There will be no hindrance to its execution.

Along with the construction of core section A, construction work on equipment, toilets, elevators, etc. to be installed in core section A will begin in phase V and will be carried out in parallel. Temporary elevators and lifts that are no longer needed will be dismantled and removed in the seventh phase.

Figure 4 shows that after the construction of the core part A is completed up to the top floor, the same tower crane 1 is used to lift the outer steel frame 8 of the outer shell structure part B, and the outer steel frame is erected. [7] shows the stage in the middle of construction of the outer shell structure part B by carrying out construction of the outer peripheral frame. In this case, the materials for the outer shell structure part B are placed within the outer perimeter site (open space) of the building plane,
This will be lifted by the tower crane 1, but the outer peripheral steel frame 8 and outer peripheral frame members (PCa plates) should originally be lifted by the tower crane 1.
Since the pieces are relatively lightweight, there is no shortage of lifting capacity even when lifting with the maximum working radius of the tower crane I.

As described in detail in conjunction with the embodiments, the effects of the present invention are as follows.According to the core-advanced construction method according to the present invention, the number of general-purpose large-scale tower cranes 1 to be used can be reduced to the minimum number. In addition to reducing costs, the tower crane 1 can be installed in the core part A, which has a large bearing capacity, and as the construction progresses in the core part A, uninstalled elevators, equipment, toilets, and stairs can be installed in the core part A. Since they can be installed and used in advance, they facilitate the reduction of temporary construction work and temporary construction costs.

In addition, the construction process of the core part A and the construction process of the outer shell structure part B are significantly different in time, and the timing of delivering the necessary structural materials to the site is also significantly different. It is extremely easy to procure materials, manage them, secure storage space, etc., and there is no risk of misidentification or confusion. Therefore, it also contributes to safe construction.

Furthermore, construction of the above-ground steel frame for core section A and the underground structure for the basement floor structure can be started at an early stage in parallel, and as construction of core section A progresses, equipment, elevators, toilets, etc. can be started at an early stage. This also contributes to shortening the construction period by several months.

[Brief explanation of the drawing]

Figures 1 to 4 are elevational views showing the important steps of the core-advanced construction method according to the present invention, Figure 5 is a plan view showing the arrangement of tower cranes, and Figure 6 is a conventional tower construction method. FIG. 3 is a plan view showing the arrangement of cranes. A...Core part B...Outer shell structure part l.
... Tower crane 8 ... Outer steel frame Figure 1 Figure 4 Figure 3

Claims (1)

[Scope of Claims] [1] In a construction method for a high-rise building in which an outer shell structure including peripheral steel columns, beams, wall plates, etc. is constructed around the outer periphery of a strong core, a tower crane is installed in the core. Then, the same tower crane was used to construct the core steel frame and the core structure up to the top floor in advance, and then the tower crane was used to construct the outer steel frame of the outer shell structure and construct the outer circumference. A core construction method that is characterized by carrying out frame work. [2] The core steel column is connected to the steel frame of the support pile, and
1. The core part-first construction method as set forth in claim 1, wherein the construction of the core part above ground, the root cutting work, and the frame work of the underground floor structure part are carried out in parallel.