JPS5844125A - Construction work of pile - Google Patents

Abstract

PURPOSE:To absorb striking sound as well as make the confirmation of bearing force easier by giving an impaction to a spacer for upper and lower piles by a hammer provided inside the upper pile whose top is covered with a sound-proof cover. CONSTITUTION:A pit 1 is excavated in such a way that the depth H of the pit is slightly shorter than the length L of a pile to be erected. Cement milk 2 is injected into the pit 1, a lower pile 3 is inserted into the pit 1, the lower face of a spacer 4 is welded to the tip of the lower pile 1, the upside of the spacer 4 is welded to the tip of the upper pile 5, and these piles are penetrated into the pile 1. Then, a hammer 6 is hung down into the hollow of the upper pile 5 by a wire 7 and an impaction is given to the upside of spacer 4 by the hammer 6 to penetrate the tip of the lower pile 3 into the ground. The striking sound of the hammer 6 is absorbed by the upper pile 5 and the sound-proof cover 8. The bearing force of the piles is confirmed by measuring the penetration amount of the piles by giving an impaction to the spacer 4 by the hammer 6 after the cement milk hardened.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pile insertion method that suppresses the generation of noise and vibration.

Traditionally, this woodcutter construction method involved drilling a hole with a stile auger machine, injecting cement bulk into the hole, and then inserting and press-fitting the pile into the hole. In order to confirm this, a load test is necessary.The test for strength is carried out by applying a load of Xk to the line part of the pile using hydraulic pressure, etc., but it is very expensive (for example, when applying 500 tons of hydraulic pressure) The shortcoming was that it required an expense of approximately 10,000,000 yen.

1. Insert the pile into the excavated hole into which cement bulk, etc. has been injected, hammer the heel of the pile, and force only the leading part of the pile into the support base. Great,
In view of the above, with the present invention, there is no need to conduct a loading test, and it is possible to significantly reduce costs. possible, and with less noise
This was done in order to provide a product that suppresses vibrations. The purpose is to drill a hole slightly shallower than the length of the intermediary pile, and after injecting cement bulk into the hole, insert one continuous hole through the upper pile and the upper pile spacer,
By driving mt into the spacer inside the upper pile, the leading edge of the upper pile penetrates into the ground. To explain in detail, Figure 1 is a diagram similar to the construction order. First, as shown in the same figure (IL), the tip of the auger machine (not shown) to the screw is Insert m" accurately on the desk, start drilling, and drill until it reaches a depth slightly shallower than the length of the pile to be erected here. cement milk 21i
Inject about 2 to 3 m and then pull up while rotating the screw At in the opposite direction.

Next, the upper pile 3 is lifted up and inserted into the drilled hole 1, and the head of the upper pile 3 is joined to the spacer 4 by #l contact.

This spacer 4 is reinforced by arranging radial glue plates (41), 4b, etc. in the cylindrical pipe 4a as shown in Fig.
By attaching and closing the hole, as will be described later, when a blow is applied to this by hand #6, the force of the blow is spread over the entire surface.

Then, lift up the upper stake 5 and connect this tip to the upper surface of the spacer 4! Threatening folds by contact, lower VT, 3 and upper pile 5
The piles are connected to each other through the spacer 4 and installed in the drilled hole 1, and the pile is erected.At this time, as shown in Fig. Because the length is shallower than the sum of the lengths of the upper pile 3, spacer 4, and upper pile 5, the upper pile 5
A part of it is exposed above the ground, and the cement milk 2 that has been press-fitted into the drilled hole is pushed upward by the zero thread of the pile, and the cement milk 2 is pushed upward by the zero thread of the pile, and is exposed to the excavated surface of the drilled hole 1 and the outer periphery of the upper pile 3, spacer 4, and upper pile 5. It will fill up between the surface and the surface.

Next, the hollow hole 5a of the upper pile 5 is suspended with a wire 7, a hammer 6 is inserted, and the hammer 6 is applied to the soil surface of the spacer 4 to give a hammering l11t- to the tip 41i- of the upper pile 3. Buy it into the ground and put it on top pile 5! This is done so that it is on the same level as the ground surface, but at this time, the hammer 6 is hammered inside the upper pile 5, so the hammer that occurs here.
Zeng is not only absorbed by the upper stake 5, but also 1 along the upper stake 5.
Since the same is transmitted to the earth, it is prevented from spreading to the earth, and the vibration becomes very small.
Since the area of propagation is limited to the purchase part at the base end of the upper pile 3, it is narrow, and the location of occurrence is very small, so it is very small. Vj on the head of 5
If the f cover has an 8t iron layer, it can be made smaller in size.

1. To check the support capacity of the pile, check that the cement milk has hardened, and as above and tir+, it is inside the upper pile 5! Insert the hammer 6t into the hole a, give several blows to the spacer 4 with the hammer 6, measure the force, and use the dynamic support force formula as 1.
In other words, it is done in the same way as the conventional hammering method, and the auger machine ammeter, the soil remaining at the tip of the screw, and the one stroke at the end of the screw give a bearing capacity of 41. You can also do it.

In the present invention, as described above, a 1 ton hole is drilled to a slightly shallower depth than the length Lj of the pile to be intermediary, and after pouring cement milk into this 1 yen hole, the upper @ 3 and upper pile 5 t spacers are drilled into 4 holes. Connect 1 through 1, connect 1 god, and connect 1 subt4 to ff1lt4 inside the upper stake 5. By doing this, the tip of the upper pile 3 121It-
Since the rice is purchased into the ground, the following young rice is produced.〇■Nkf is small, and since the driving is done inside the upper pile 5, the driving mf% at this time is small, which causes vibration. There are also few.

■The bearing capacity of the piles is equivalent to that of the conventional driving method.■Since the piles are suspended in the drilled hole 1, the piles can be installed steadily. to tilt d
do not have.

■Confirming the bearing capacity is easy and there is no need to conduct expensive loading tests.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, FIG. 1 is a schematic diagram showing the drilling order, and FIG. 2 is a perspective view showing the spacer. 1...Drilling, 2...Cement Milk, 311...Top stake, 4...Spacer, 4a...Cylinder part, 4b・-・Rip, 4C...Lid, 5・Fist・Upper stake, 6・1 Hammer, 8-・・Defense tl Kano'% a1st (, () Prison λ) (d) Fig. 1 (e) (e) Fig. 2

Claims (3)

[Claims] (1) Drill a hole 1 ctLvc slightly shallower than the length of the pile to be inserted, and after injecting cement milk into the hole, insert the upper pile and the upper pile through a spacer, Pile fly penetration construction method 0 characterized in that the lower pile point 4 is forced into the ground by driving an I1 class spacer inside the upper pile. (2) The method of embedding piles as described in paragraph 1 above, where an iron layer of anti-t cover is placed on the line of the upper pile. (3) In addition to arranging the lip in the cylindrical tube, the upper end of the circular tube is attached with the spacer forming the I11'tl: 1 spacer and the range of the special ff restriction specified in item 1 or 2 as the special value. The pile insertion method described.