JPS63272811A - Pile-driving and connecting block work - Google Patents

Abstract

PURPOSE:To prevent the occurrence of cracks and also to raise the earthquake proofness of blocks by a method in which a supporter, a column, a beam, and a reaction base are stacked up on a pile by matching their through holes, and a prestress is applied to them. CONSTITUTION:A pile 1 is set with a supporter 2, the blocks of column 31 and beam 32 are stacked up on the supporter 2, and a reaction base 4 is placed on the uppermost block. A PC steel rod 5 whose one end is fixed to the supporter 2 is set between the pile 1 and the hole of the blocks and concrete is placed. After the concrete hardens, the other end of the rod 5 is pulled through the base 4 to give it prestress. A light-weight structure can thus be obtained, having earthquake proofness. Partial concentration of prestress can be prevented, and no cracks occur in the blocks.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pile driving connected block construction method used, for example, in constructing breakwaters and the like.

(Conventional technology) Conventionally, as a construction method suitable for building structures on soft ground,
The pile driving method is known.

As shown in Figure 3, this construction method involves driving into the ground q/ν
A supporting member consisting of an inner wedge and an outer wedge b2 that engages with the inner wedge is placed at a predetermined position on the pile a, and is hung by a pcrJA wire d with one end fixed to the inner wedge receiver C. Stack block O4 and beam block e2 on wedge b2 in sequence, and use the ci fish that has stacked these blocks Q and Q2 up to the top of pile body a to reduce the reaction acting on the reaction force table f by jacking pctJ4 line d. Prestress is applied to blocks c and c2 by force, and then concrete or mortar h is placed between pile a and the through-hole walls of blocks e and e2 in order to prevent rust on PC4l wire d and further increase the strength of the entire structure. It is injected into a rigid frame structure.

(Problems to be Solved by the Invention) However, according to the conventional construction method described above, only blocks e and e2 receive the prestress, so in order to prevent the stress from becoming excessive, It is necessary to increase the wall thickness of blocks e and e2 (usually 20 to 30 cm). As a result, the entire structure becomes heavier and the inertial force due to its own weight increases, which is disadvantageous in the event of an earthquake.

In addition, precast blocks e and e2 are not always set horizontally due to manufacturing errors, construction errors, and driving errors of pile a, so the end face of the uppermost block C or e2 may not always be set horizontally. The contact between e1.02 may be a point contact, and if the steel wire d is tensed under such circumstances, stress will be concentrated on the contact surface, causing
Cracks may occur.

An object of the present invention is to provide a pile driving and connecting block construction method that eliminates such conventional disadvantages.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention arranges a support member at a predetermined position of a pile driven into the ground, and attaches a column or beam to the support member. Load blocks such as the above by fitting their through holes into the pile bodies, place one reaction force stand on the top block 1-1, and press ()''L(A and block 1). P covered with a sheath with one end fixed to the Shinobe Shrine between the transparent hole and the surface.
At the same time as placing the Cn4 rod, concrete or mortar is poured, and after the concrete or mortar hardens, the other end of the PC steel rod is pulled through the reaction table, and the It is characterized in that the reaction force gives sore stress to the block and the filled concrete or mortar.

(Function) Since the PCw4 wire was covered with a sheath, the other end of the Pc steel wire was placed between the concrete poured between the through-hole walls of the pile body block cock, or the hardened mortar. It is possible to pull it through the block (1). The stress t applied to the block is smaller than that of the conventional construction method.

Therefore, the wall thickness of the block has been made smaller than before.
Furthermore, since stress is not concentrated locally on the block, cracks are less likely to occur in the block.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 and 2 do not show an example of a structure created by the pile driving connected block construction method of the present invention.

In the figure, 1 (a pile body made of a steel pipe or the like whose lower part is driven into the ground 9, 2 a support body fixed at a predetermined position of the pile body 1, 3
7 and 3□ are pillar blocks and beam blocks stacked iQ on the support member 2, respectively, and the blocks 3. ．． 32 is attached to the pile body 1 by inserting the pile body 1 into the through hole 8 formed in each of them and placing it on the support body 2 (the inner wall surface of the through hole 8 and the pile body 1 4 is the topmost block. 3. Concrete 1 or steel reaction table is installed on top of the top block. : Fixed, spiral.

A PC steel rod covered with a wire 6, for example, two pieces of the PC steel rod 5 are passed through the through holes 4a, 4a of the reaction force table 4, and the other end is passed through the reaction force table 4 by a shirt 1 (not shown). Make you nervous. , 7 is pile body 1 and company block 31,
This is concrete or mortar placed between the beam block 32 and the inner wall surface of the through hole 8.

Next, an example of the construction method of the present invention will be explained.

First, the pile body 1 is driven into the ground 5189 to a predetermined depth,
The support body 2 and one end of the PCN4 rod 5 are placed near the ground 9-1. Next, the pile body 1 is inserted r1 into the through hole 8 on the support body 2, and the required number of 11 blocks 3 □ are stacked on top of each other while holding the pile body 1 in the through hole 8. After that, with the PC steel bar 5 erected, concrete or Place mortar 1. Next, the reaction force table 4 is placed on the top block 31, and P
The C steel plate 5 is inserted into the through hole 4a of the reaction table 4.

4a, and after the concrete or mortar 7 has hardened, the PC steel rod 5 is tensioned with a jack (not shown) mixed between the PC steel rod 5 and the reaction force table 4.

As a result, a downward breath stress as a reaction force is transmitted to the shaft block 3 through the reaction force table 4. and beam block 32.
Given, pillar block 3. Prestress is also applied to the concrete or rutaru 1 fixed to the beam block 3□ and the pile body 1.

Thus, pile body 1, column block 3. and the beam block 32 and ]] The concrete 1 and the mortar 7 form an integrated structure (a rigid frame structure).

In addition, if the influence of waves is considered to be severe in the open sea, block 3. ．． When loading 32, PC steel bar 5
Perform the primary tension of block 3, . stabilize 32,
Next, concrete or mortar 7 is applied to the pile body 1 and blocks 3. ．． 32 holes 8, and after hardening, PCwI
Perform the final tension of bar 5 and move to block 3. ．． 32, concrete or mortar 7, etc., can also be prestressed.

(Effects of the Invention) As explained above, according to the present invention, the wall thickness around the through holes that fit into the pile bodies of column blocks and beam blocks can be made thinner, so that the structure is light 1 stalk of garlic
1 and become right-handed. In addition, since the stress applied to the brace of the PC steel bar is not partially concentrated on the column blocks and beam blocks, there is an effect that there is less risk of cracks forming in the blocks. .

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of one example of a structure created by the construction method of the present invention, an enlarged cross-sectional view of Figure 2 (other main point 81), and Figure 3.
The figure is a cross-sectional view of an example of a structure created by a conventional construction method. 1...Pile rest 2...Supporting member 31...
・Share block 3□...Beam block 4...Reaction force table 5...PC steel bar 6...Spiral sheath 7...Concrete or mortar 8...Through hole 9...Outside the ground 2 people-'

Claims (1)

[Claims] A support member is arranged at a predetermined position of the pile body driven into the ground, and blocks such as columns and beams are stacked on the support member with their through holes fitted to the pile body, and the uppermost block is stacked. A force platform is placed, a sheathed PC steel rod with one end fixed to the support member is placed between the pile body and the through-hole wall surface of the block, and concrete or mortar is poured; After the concrete or mortar hardens, the other end of the PC steel rod is pulled through the reaction force table, and the reaction force applies prestress to the block and the filled concrete or mortar. Connected block construction method.