JPH0874265A - Precast concrete foundation pole and manufacture thereof - Google Patents

Abstract

PURPOSE: To reduce superfluous digging, and reduce the quantity of residual earth for processing, save the cost of construction and shorten the term of construction. CONSTITUTION: A base rod and each fixing rod such as foundation beam rods 4 and 5 and a post rod 2 are arranged, respectively, on the base of a foundation post and independent footing, and also foundation concrete P is laid. The lower end fixing rod of the post rod 2 and the base fixing rod of the foundation rod are fixed, severally, to the concrete part of the foundation post, and also a PC foundation post projecting by a required length for fixation is constituted in the direction of each extension of the post rod 2 and the foundation beam.

Description

Detailed Description of the Invention

[0001]

The present invention relates to a precast concrete foundation column (hereinafter referred to as a PC foundation column) in a building,
It relates to the manufacturing method.

[0002]

2. Description of the Related Art A building supports an upper structure,
There is a foundation part that supports the building by receiving other external force, and further, a pile land industry that supports the foundation part is deeply ground to excavate the foundation part, and the foundation part is adjacent to the foundation of the foundation pillar. It consists of foundation beams that connect the foundation columns. After foundation and excavation, the foundation of the foundation pillar is prepared by digging the ground on the bottom surface of the foundation, and then laying concrete to prepare for foundation construction.

The foundation is constructed by marking out the foundation columns and beams on the waste concrete, and then assembling the foundation columns.
Further, assemble the foundation beam reinforcement, assemble the formwork to the foundation column and the beam reinforcement, and place the concrete.When the placed concrete develops the specified strength, the formwork is dismantled and the surrounding voids are refilled for construction. Complete. At this time, the rebar scaffolds necessary for the assembly of the foundation column reinforcements and foundation beam reinforcements are temporarily installed, and once the assembly is completed, they are dismantled and moved to the next construction area.

[0004]

As for the excavation width required to construct the foundation, the rebar scaffold of the foundation, the rebar assembly, and the formwork assembly are carried out. Since extra digging is carried out, the amount of excavation increases, and the cost for carrying out excavated soil and processing such as backfilling increases. In addition, since the reinforcing bars and formwork required for building the foundation must be transported to the building position of the foundation, heavy labor is required, and a large number of reinforcing bars and formworkers specialized in assembling are put on site. There is a problem that the process becomes unstable because it depends on the weather.

The present invention has been proposed in view of the above-mentioned problems of the prior art, and paying attention to the fact that the foundation member is a simple work for reversing the actions of rebar assembly, formwork assembly and dismantling. By establishing a manufacturing yard that supplies basic materials on the site of the site and improving the environment of the work place,
It was proposed for the purpose of reducing excess dug, residual soil, and treated soil volume to reduce the cost of earthwork, and to provide a PC foundation pillar with a stable process and a manufacturing method thereof regardless of the weather. is there.

[0006]

In order to achieve the above-mentioned object, a precast concrete foundation column according to the present invention comprises:
Base reinforcements and foundation reinforcements of foundation beams and reinforcements are placed in the base and independent footing of foundation reinforcements, and foundation reinforcement concrete is placed. When the base end fixing bars of the beam are respectively fixed, a required fixing length is projected in the extending direction of the column bar and the foundation beam.

According to a second aspect of the present invention, a portion corresponding to a cross section of the foundation beam is cut in a joint portion of the foundation column with the foundation beam extending from the pillar, and the joint portion is formed in the joint portion. Adjacent to each other, there is provided a groove for inserting a side frame in the concrete formwork for construction of the foundation beam. According to the invention of claim 3, anchor bolts for constructing a steel frame are planted in the foundation columns.

According to a fourth aspect of the present invention, a manufacturing yard for supplying a base member is provided on the site of the construction site, and the reinforcing bar is processed and supplied in the manufacturing yard to install a bottom formwork for the bottom of the foundation pillar. Base reinforcements, pillar reinforcements and anchoring reinforcements for foundation beams are placed in the formwork, and a side formwork of a predetermined size is integrally mounted on the side surface of the bottom frame, concrete is placed in the formwork, and The present invention relates to a method for manufacturing a precast concrete foundation column, which comprises demolding the side formwork and moving to a stockyard for curing after the concrete strength is developed.

[0009]

As described above, according to the PC foundation column of the present invention, the base of the foundation column is provided with required base reinforcements, and the independent footing is provided with predetermined foundation column reinforcements and anchorages of foundation beams. Reinforcement is performed, the foundation column concrete is placed, the lower end anchorage part of the column reinforcement and the base end anchorage part of the foundation beam are anchored in the concrete part, and the required anchoring length projecting in the extension direction of the column reinforcement and foundation beam. Since this is done, it is easy to construct the foundation pillars and foundation beams after the earthquake.

According to the second aspect of the present invention, a portion corresponding to the cross section of the foundation beam is cut in the joint portion of the foundation column with the foundation beam, and the foundation beam is adjacent to the portion. Since the side groove of the concrete formwork for construction is provided, by inserting the beam side frame into the same groove and placing the beam concrete in the formwork, the formwork end becomes the foundation pillar. Fixed.

According to the third aspect of the present invention, the steel frame pillar is fixed by implanting the steel structure erection anchor bolt in the foundation pillar. According to the invention of claim 4, a manufacturing yard is provided in the site of the construction site, the reinforcing bar is processed, and the bottom formwork of the bottom of the foundation column is installed. Anchorings for the foundation columns are arranged, side molds of a certain size are integrally mounted on the side surface of the same bottom, concrete is placed in the formwork, and the cast concrete has given strength. After that, by removing the mold, moving to the stockyard and curing it in the stockyard, a PC foundation pillar with high structural reliability and excellent quality in which the foundation pillar and the foundation beam are integrated is constructed. It is manufactured efficiently.

[0012]

The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a reinforcing bar diagram showing a structure of reinforcing bars arranged in a foundation column, where A indicates an outer contour of a PC foundation column and B indicates an outer contour of a PC foundation beam. The base reinforcement 1 is arranged on the base of the PC foundation pillar A, and the reinforcement 2 of the reinforcement having a required fixation length is extended from the outer upper portion of the foundation pillar A to the reinforcement 1 of the base reinforcement 1. .

Further, upper and lower beam reinforcements 4 and 5 are arranged in the footing portion 3 in a length corresponding to the fixing length. Reference numeral 4 is an upper beam reinforcement, 4a is an anchored rebar of a post-beam, 5a is an anchored bar of a post-beam, 2b
Is a stirrup and 4b is a rib. Figure 4 is a completed drawing of a PC foundation column. The rebars arranged as described above are set in a predetermined formwork, concrete is placed, and the placed concrete develops a predetermined strength. Then, the PC basic pillar A is formed.

The PC foundation pillar A is provided with a cutout portion 7 corresponding to the cross section of the PC foundation beam B arranged between the adjacent foundation pillars, and the same portion is formed later. The insertion groove 6 of the beam form which closes both side surfaces of the PC base beam B joined to 7 is arranged, and by inserting the form end of the beam side wall into the groove 6, the form end is Fixed. In addition, when attaching a steel frame pillar, it is fixed by implanting the steel structure erection anchor bolt 8 in a foundation pillar. (See FIG. 5) Next, a method of manufacturing the PC foundation pillar A will be described.

As shown in FIG. 6, the PC member manufacturing yard D is provided with a gate-type traveling crane a, and a carrier carriage c which travels on a track c ₁ is installed on a member carrier path b. d is a reinforcing bar processing and assembling yard, e is a manufacturing yard for the PC foundation pillar A, f is a manufacturing yard for the foundation beam B, g is a stock yard for the respective basic PC members manufactured, and h is a track of the portal crane. is there.

Then, the reinforcing bar processed in the reinforcing bar processing and assembling yard d is placed on the nearest transfer carriage c and transferred to the manufacturing yard e of the PC foundation pillar A. A bottom formwork 9 is installed in the manufacturing yard e, and the bottom formwork 9 is assembled on the same side frame 9 in the order of the base reinforcement 1, the column reinforcement 2, the beam reinforcements 4, 5 as shown in FIG. Assembling is completed by arranging the stirrup 2b on the columnar bar 2 and the rib 4b on the beam.

Next, P is attached to the reinforcing bar assembled as described above.
Assemble the side molds on the four sides of the C foundation pillar A. The same side mold is constructed by assembling side molds 10a and 10b obtained by dividing one side mold 10 into three parts, and beam bars 4 and 5 penetrate through the side mold 10b divided at the center. Column clamp 11 around the frame
It is concluded with. Reference numeral 12 is a formwork for the cutout portion of the beam.
(See FIG. 3) The anchor bolt 8 for the steel frame pillar is embedded and fixed in a predetermined position.

Next, as shown in FIG. 3, concrete P is poured into the above-mentioned mold via a concrete placing hose 13.
In FIG. 4, 14 is a round ring for lifting. Thus, when the poured concrete P develops the required strength, the side formwork 10 is demolded, transported to the stockyard by a mobile crane (not shown) installed in the site, and cured, and then the carrier truck c is used to remove the building foundation. It is transported to the specified position and lifted by a crane.

[0019]

As described above, in the PC foundation column according to the present invention, the foundation base reinforcement, the foundation beam and the anchorage of the column reinforcement are arranged, and the foundation support concrete is cast, and the foundation support concrete part is formed. Since the lower end anchoring part of the column reinforcement and the base end of the foundation beam are respectively anchored, and a predetermined anchoring length is projected in the extension direction of the column reinforcement and the foundation beam, the construction of the foundation column and foundation beam after the The work can be done easily, and the work such as reinforcing bar arrangement and concrete placement can be done easily, the amount of excavated soil is small, labor saving is achieved, and the construction period is shortened.

According to a second aspect of the present invention, a portion corresponding to the cross section of the foundation beam is cut off at a joint portion of the PC foundation column with the foundation beam connected to the same column, and the PC foundation column is adjacent to the joint portion. Thus, by providing the insertion groove of the side frame in the concrete formwork for constructing the foundation beam, the foundation beam constructed between the PC foundation columns can be accurately and easily constructed.

According to the third aspect of the present invention, since anchor bolts for erection of the steel frame columns are planted in the foundation columns, the steel frame columns are securely fixed. According to the invention of claim 4, the base reinforcement, the column reinforcement, and the beam reinforcement of the PC foundation pillar are processed in the production yard provided on the site of the construction site, and the PC reinforcement pillar is conveyed to the nearest foundation pillar production yard by the conveying means, and then, in the formwork. By assembling each of the above-mentioned reinforcing bars and placing concrete, the PC foundation columns can be efficiently manufactured at the construction site.

Due to the PC foundation column, there is almost no work around the installation position of the column, the overdug of excavation is minimized, the amount of excavated soil is reduced, and the residual soil disposal associated therewith is reduced. Construction cost is reduced. In addition, the production of PC foundation columns is carried out in a certain work yard on the construction site as described above, and the work of assembling reinforcing bars, assembling formwork, placing concrete, etc. is simplified, and the surroundings are always organized. In addition, the working environment is good, and therefore, the work efficiency of assembling the reinforcing bars is significantly improved, and labor is saved.

Further, a PC foundation member manufacturing yard is provided on the site of the construction site, the reinforcing bars are processed in the reinforcing bar processing and assembly yard, and the reinforcing bars processed in the PC basic pillar manufacturing yard are supplied to the base bars of the PC basic pillars. Assembling the column reinforcement and the beam reinforcement in the formwork and arranging the concrete and then placing the concrete. After the placed concrete develops its strength, it is demolded and further cured in the stockyard to manufacture the PC foundation column member. As a result, each process is not affected by the weather, and a strict inspection is performed for each process, which significantly improves the quality of the PC foundation pillar member.

[Brief description of drawings]

FIG. 1 is a perspective view showing a bar arrangement of a PC foundation column according to the present invention.

FIG. 2 is a perspective view showing a manufacturing process of the PC foundation pillar.

FIG. 3 is a perspective view showing a form-assembled state of the PC foundation pillar.

FIG. 4 is a perspective view showing a completed state of the PC foundation pillar.

FIG. 5 is a perspective view showing a state where anchor bolts for erection of a steel frame column are planted in the PC foundation column.

FIG. 6 is a plan view showing a manufacturing yard for a PC base member.

[Explanation of symbols] A PC foundation pillar B PC foundation beam D PC member manufacturing yard a Gate-type traveling crane b Member conveying path c Carrier trolley c ₁ track e PC foundation pillar manufacturing yard f PC foundation beam manufacturing yard g Foundation Stockyard of PC member h Track of gate type traveling crane 1 Base reinforcement 2 Column reinforcement 2a Column reinforcement anchor 2b Belt reinforcement 3 Footing part 4 Beam reinforcement 4a Post-strength anchored reinforcement 4b Rib 5 Beam reinforcement 5a Post-cast beam Fixing rebar 6 Insertion groove of formwork 7 Cutout section 8 Anchor bolt 9 Bottom formwork 10a Side formwork 10b Side formwork 11 Column clamp 12 Formwork for beam cutout section 13 Concrete placing hose 14 Lifting round ring

Front Page Continuation (72) Inventor Kimihiro Yamamoto 4-6-15 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd.

Claims (4)

[Claims] 1. A base reinforcement and an anchoring reinforcement of a foundation beam and a column reinforcement are arranged in a base and an independent footing of the foundation reinforcement, and the foundation concrete is placed and the concrete reinforcement of the foundation reinforcement is A precast concrete foundation column, characterized in that, when the bottom end anchoring portion and the base end anchoring bar of the foundation beam are anchored respectively, a required anchoring length is projected in the extending direction of the column bar and foundation beam. 2. A portion corresponding to a cross section of the foundation beam is cut out at a joint portion of the foundation pillar with a foundation beam extended from the pillar, and the foundation is provided adjacent to the cutout portion. The precast concrete foundation column according to claim 1, wherein a groove for inserting a side frame in a concrete formwork for constructing a beam is provided. 3. The precast concrete foundation column according to claim 1, wherein anchor bolts for constructing a steel frame are planted in the foundation column. 4. A manufacturing yard for supplying a base member is provided on the site of a construction site, a reinforcing bar is processed and supplied in the manufacturing yard to install a bottom formwork on the bottom of a foundation pillar, and the base form is used for the bottom formwork. Reinforcing bars, columns, and anchoring beams for foundation beams are arranged, side molds of a specified size are integrally mounted on the sides of the bottom frame, and concrete is poured into the molds to develop the specified concrete strength. After that, the side formwork is demolded, and the precast concrete foundation column is manufactured by moving to a stockyard for curing.