JPH0414525A - Coping pile work - Google Patents

Abstract

PURPOSE:To shorten the period of construction by a method in which a female screw cylinder having a female screw groove on its periphery is attached to the head exposed from the ground of a pile, and a wedge with a male screw groove is attached to the female screw cylinder. CONSTITUTION:A precast concrete pile 1 is penetrated into the bearing layer 3 of the ground 2, and the head of the pile 1 is projected from the surface 4 of the ground. A female screw cylinder 16 is attached to the head of the pile 1, and the male screw groove of a wedge 9 is coupled with the female screw groove of the cylinder 16 to attach the wedge 9 to the pile 1.

Description

[Detailed Description of the Invention] (Field of Industrial Application) This invention is a pile foundation in which an umbrella cone is fitted into a pile formed by fitting and joining a female cylinder to the foundation pile head of a ready-made pile method, and the pile is integrated with the pile. A ready-made pile method in which an umbrella cone is attached to a pile with a female thread groove cut into the pile cap body, and an umbrella pile method in which an umbrella cone is attached to a cast-in-place pile and the umbrella cone attached to the pile cap becomes the foundation bed. Regarding.

(Conventional technology) Conventional foundation pile construction methods are broadly divided into cast-in-place pile construction and embedded pile construction.In order to connect the pile head and the footing that forms the foundation base, the pile is inserted into the underground support layer. The head was cut off, cracked stone was laid around the pile that would become the floor base, concrete was poured to the required thickness, and a concrete base was poured to surround the pile, making up the foundation base. This is the flooring layer. In the cast-in-place pile method, after driving the piles, the ground is excavated, the pile heads are exposed, concrete is poured, and the reinforcing bars are exposed. This is a foundation pile construction method that supports the superstructure by connecting the reinforcing bars of the superstructure and the foundation pile head on top of the bed layer, connecting the superstructure and the pile as an integrated structure.

(Problem to be solved by the invention) In the pile driving method and the cast-in-place pile method, the ground around the pile head is excavated, and then split stones are laid and concrete is poured, resulting in a single bed layer. Foundation ground construction method.

Concrete quality issues due to concrete strength, etc. during the concrete pouring process where concrete is post-cast around the piles to construct the floor slab.

Material costs for cracked stone and concrete and construction labor costs.

Shortening of foundation construction period.

A point regarding the joint strength of the piles and the deck layer.

The conventional flooring layer was made up of a single flooring layer using the concrete pouring method, so the heavy pressure applied to the flooring layer was absorbed by the entire flooring, so it could not be applied to the flooring during shaking such as an earthquake. There is a drawback that as the applied pressure increases, the upper structure will shake more.

(Function of the invention) This construction method uses an umbrella cone made of press cast concrete for piles, rather than a post-casting method using concrete, because the pile and the bed layer, which is cast around the pile, are integrated with the pile. By joining the umbrella cone to the pile head, the umbrella cone forms the foundation bed layer.As a construction method, the umbrella cone is screwed into the female thread tube which is welded and bolted to the pile cap, and the pile cap is made of press cast concrete. In the ready-made pile method and the cast-in-place pile method, the pile cap is fitted into the center hole of the umbrella cone to expose the reinforcing bars of the pile cap, and then the foundation bed of the umbrella cone is formed. The upper part was constructed by pouring concrete into the recessed part to create a completely integrated structure of the pile and the umbrella cone, and by inserting the umbrella cone into the pile cap and welding the pile and the umbrella cone to form an integral oval structure. This provides an umbrella pile construction method in which the heavy stress of the structure is applied to the individual main piles as a foundation bed.

(Example) To explain this umbrella pile construction method with drawings, Figure 1 shows the top surface 2 of the pile 1 being horizontal, and the vertical portion 3 where the girth is vertical, and the bottom surface pointing toward the center hole of the bottom. This is an overall view of a main pile 6 in which an umbrella cone 5 consisting of an inclined inclined portion 4 is attached to a ready-made pile and a cast-in-place pile 1. Figure 2 shows a ready-made lug having a structure in which a spiral male screw groove 8 is carved on the inner periphery of the center hole 7, which becomes the inclined portion 4 from the girth of the vertical part 3 where the top surface 2 is horizontal toward the center hole 7. Umbrella cone to store 5
FIG. Figure 3 shows a structure in which a spiral groove is carved on the outer periphery where the top surface 2 is horizontal, from the waist circumference to the center hole, and the groove effect is a structure in which spiral grooves are carved on the outer periphery to obtain buoyancy. This is an umbrella cone 5 used for ready-made piles and cast-in-place piles. FIG. 4 is a cross-sectional view of an umbrella cone 5 used for spot punching, which has a recess 9 larger than the center hole 7, which serves as a through hole extending to the bottom, in the center of the top surface where the top surface 2 is horizontal. . FIG. 5 is a sectional view of the umbrella cone 5 used for spot punching, in which the center hole 7 of the umbrella cone 5 penetrates from the top surface 2 to the bottom. Figure 6 shows a ready-made pipe in which a female threaded cylinder 12 having a cylindrical structure with a female thread /1110 carved on the outer periphery and a hole through which the inner periphery 11 is formed is attached to the pile cap 13 of the pile 1, and the female threaded cylinder 12 is a cross-sectional view. FIG. 3 is a front view showing the state of use. FIG. 7 is a cross-sectional view of a female thread @12 which has a female thread groove 10 carved on its outer periphery, and a female thread cylinder 12 with the top surface 2 of the inner periphery 11 closed is attached to the pile cap 13 of the pile 1. FIG. 3 is a front view showing a state in which Figure 8 shows a female screw hole 14 in the center of the top surface 2 of the pile *13! After inserting into the pile cap 13 a female screw cylinder 12, which has a concavity 9 at the center of the term M2 whose outer circumference is a bell screw 10 and whose center penetrates through the hole in the inner circumference 11, into the pile 1 that has been prepared.
Insert the bolt 15 into the pile cap 13 from the center of the recess 9 of the female thread @ 12.
FIG. 2 is a front sectional view showing a state in a ready-made pile construction method in which the pile 1 is screwed into the female screw hole 14 of the pile 1 and the female screw l'1ij12 is integrated with the pile 1. FIG. 9 shows an internally threaded cylinder 12 with a vertical portion 3 between the ridges. FIG. 10 shows a female threaded tube 12 with a vertical portion 3 between the female thread grooves 10 on the outer periphery and a through hole 16 horizontally drilled in the vertical portion between the female threads. The female thread cylinder 12 is fitted into a pile 1 which has a plurality of female thread holes 14 with female thread grooves 10 cut horizontally on the side surface and a certain depth on the inner periphery, and the through hole 16 of the female thread cylinder 12 and the female thread groove of the pile cap 13 are inserted. 10 is a partially sectional front view showing a state in which the bolts 15 are screwed in vertically to integrate the internally threaded cylinder 12 and the pile 1 after the bolts 10 are aligned. FIG. FIG. 11 is a front view showing a state in which the female threaded cylinder 12 is integrated with the pile head of the pile 1. 12th
The figure is a front view showing a pile 1 in which a female thread groove 10 is cut in the pile head portion of the pile I. Figure 13 shows a ready-made pile construction method in which a pile 1 with a female thread groove 10 cut into the pile head is inserted into the support layer in the ground 17, excavation is made around the pile head 9, and an umbrella cone 5 is attached. FIG. FIG. 14 is a plan view of the umbrella cone 5 in which the reinforcing bars 18 are exposed on the outer periphery of the center hole 7 of the umbrella cone 5. Figure 15 shows a recess 9 larger than the through-hole 16 made through the bottom in the center of the top surface 2, where the top surface 2 is horizontal, after exposing the reinforcing bar 18 of the cast-in-place pile cap driven in the ground 17. After drilling the through hole 16 of the umbrella body 5 with
5 is an umbrella pile construction method for cast-in-place piles, in which the umbrella cone 5 is a cross-sectional view. Fig. 16 shows an umbrella cone 5 which is housed in the pile head of a pile 1 that has been inserted into the support layer 17 underground.
The top surface 2 will be the foundation floor. This is an umbrella pile method 1 in which an umbrella cone 5 is integrated with a foundation pile formed by standing piles 6 underground 17.

(Effect of the invention) Since the deck layer is constructed by integrating the umbrella cone made of press cast concrete attached to each pile cap with the pile cap of each foundation pile, the heavy pressure applied to the deck layer can be reduced by individual pile caps. By being distributed over the support piles, the umbrella cone has the effect of reducing and stabilizing the shaking of the superstructure.The umbrella cone stabilizes the supply force of press cast products and also stabilizes the supporting force of the flooring layer. When the umbrella cone is attached to a portion of the pile of the floor bed layer, the material cost of 1-split chestnut stone and the material cost of ready-mixed concrete used in the gap between them can be reduced. As a result, the range of pouring of the floor slab layer can be narrowed. By constituting the entire deck layer, the umbrella cone can reduce the cost of laying the deck layer and material costs, and by integrating the piles and the umbrella cone, the upper structure can withstand shaking caused by earthquakes, etc. The part that is applied to the fulcrum of the object's turning force is 1. The umbrella cone attached to each pile has a floating force and has the effect of dispersing the shaking individually, which has the effect of minimizing the range of shaking of the superstructure.

[Brief explanation of the drawing]

Figure 1 is an overall front view of the pile, Figure 2 is a front sectional view of the umbrella cone, Figure 3 is a front view of the umbrella cone, Figure 4 and Figure 5 are front sectional views of the umbrella cone. , FIG. 6, and FIG. 7 are front cross-sectional views showing the state of use, which are cross-sectional views of the female threaded cylinder being attached to the piles. Figure 8 is a front cross-sectional view of the female threaded tube attached to the pile, Figure 9 is a front view of the female threaded tube, Figure 10 is a partial vertical cross-sectional view showing the state in which the female threaded tube is attached to the pile, and Figure 11 is the pile. FIG. 12 is a front view showing a pile with a female screw groove attached to the pile head. Figure 13 is a front view explaining construction and use. FIG. 14 is a plan view of the umbrella cone. FIG. 15 is a front view showing the construction state in which the umbrella cone is a sectional view. 1st
Figure 6 is a perspective view showing the construction state.

Claims (1)

[Claims] 1. In the ready-made pile driving method and the cast-in-place method, the top surface of the foundation pile is horizontal and the girth is vertical, and the bottom surface slopes toward the center hole of the bottom. This umbrella pile method is characterized by attaching an umbrella cone to the pile head of the foundation pile. 2. An umbrella cone with a vertical trunk with a horizontal top surface and a sloped surface facing the center hole at the bottom with a spiral male thread groove carved on the inner periphery of the center hole, and an inner cone with a female thread groove carved on the outer periphery on the pile head. After attaching a female threaded tube with a cylindrical structure with a hole through the circumference to the pile cap and making it an integral structure, the umbrella cone is integrated with the pile cap by screwing the male thread of the center hole of the umbrella cone into the female threaded tube of the pile cap. The umbrella pile construction method according to claim 1, which uses a ready-made pile made of aluminum. 3. After retrofitting and integrating a female thread cylinder with a female thread groove on the outer periphery and a closed top surface on the inner periphery into the foundation pile cap, attach it to the pile cap and then attach it to the inner periphery of the center hole of the umbrella cone. The umbrella pile construction method according to claim 1 or 2, in which a ready-made pile is formed by screwing a cut male screw into a female screw tube of a pile head and integrating the pile. 4. A female screw tube with a female screw groove on the outer periphery and a female screw hole in the center of the top surface of the foundation pile cap, which has a recess at the center of the top and the center of the recess penetrates the hole on the inner circumference, is attached to the pile cap with a female screw hole at the center of the top surface of the foundation pile cap. After fitting the female threaded cylinder, screw a bolt into the female threaded hole of the pile cap from the center of the recess of the female threaded cylinder to integrate the female threaded cylinder into the pile cap, and then attach the umbrella cone with a male thread groove on the inner periphery of the center hole to the pile. An umbrella pile construction method as set forth in Claims 1, 2, and 3 in which a ready-made pile is integrated with a pile screwed into a female threaded cylinder of the head. 5. A female screw cylinder with a vertical through hole made horizontally in the vertical part between the female screw threads with a vertical part between the female thread grooves on the outer periphery, and a female screw cylinder whose top surface is closed, is placed horizontally on the side of the pile cap to a certain depth. Fit the female thread tube into the pile head which has multiple female thread holes with female thread grooves carved on the inner circumference, align the through hole of the female thread tube with the female thread hole of the pile head, then screw the bolt vertically to retrofit and integrate the female thread tube. The umbrella pile construction method according to Claims 1, 2, 3, and 4 in a ready-made pile, in which an umbrella cone having a male thread groove is then attached to the inner periphery of the center hole. 6. The umbrella pile construction method according to claim 1, item 2, characterized in that a male thread groove 9 is carved on the outer periphery of the pile head of the ready-made pile. 7. Insert an umbrella key into the foundation pile cap for cast-in-place piles, which has a recess larger than the through hole in the bottom in the center of the top surface where the top surface is horizontal, and then pour concrete into the recess. The umbrella pile construction method according to claim 1, wherein the pile head and the umbrella cone are integrated with concrete. 8. Claim 1, item 7, characterized in that the foundation pile head in the cast-in-place pile is fitted with a penetration part through which the inner periphery of the center hole of the umbrella cone is perpendicularly inserted into the pile head. Umbrella pile method. 9. In the cast-in-place method, an umbrella cone with exposed reinforcing bars is fitted around the outer periphery of the center hole of the umbrella cone into the foundation pile cap with exposed reinforcing bars, and then the reinforcing bars of the pile cap and the reinforcing bars of the umbrella cone are tied together. The umbrella pile construction method according to claim 1, item 7, or 8, characterized in that the foundation pile and the umbrella cone are integrated by subsequently pouring concrete. 10. A feature of the pile cap used in ready-made pile construction method and cast-in-place method is that an umbrella cone is attached to the foundation pile cap, with the top surface being horizontal and a spiral groove carved from the circumference toward the center hole on the outer periphery. An umbrella pile construction method according to claims 1, 2, 3, 4, 5, 6, 7, 8, and 9.