JPS6157712A - Pouring device for excavation hole - Google Patents

Abstract

PURPOSE:To perform a rapid work, by a method wherein a lateral blade member, which has an excavating blade, extended in a direction extending across an outer pipe for excavation hole, and can be withdrawn into the outer pipe, is coupled to a forward end device. CONSTITUTION:A forward end device 3 is formed such that an inner pipe 2 is engaged with an outer pipe 1 securely provided at its lower end surface with tips 5 for excavation, and a packer 8 is engaged with a body 7. The forward end device is connected to the lower end of the inner pipe 2 through a seal part 6. A lateral blade member 4, which has an excavating blade 11, extended at the forward end in a direction extending across the outer pipe 1 and held to a leg part 12, is coupled to the lower end of the forward end device 3 through a coupling member 10. Further, the lateral blade member 4 is so constituted as to allow withdrawal of the member into the outer pipe 1 in a way that the side parts of the leg part 12 can be engaged with vertical slits 13 of the outer pipe 1.

Description

[Detailed description of the invention] (Field of application in the FFJ industry) The present invention involves drilling a hole in the ground and applying grout to a desired depth range.
t: Pertains to drilling and injection equipment for ground improvement, water stoppage, etc. by infiltration and infiltration.

(Prior art) Conventionally, prior to grouting, one pot was placed in the ground (
When installing on rock (including bedrock), the rod is held upright against the ground and is gradually propelled and rotated to scrape away the soil and stone with a hard tip, diamond tip, etc. attached to the tip, and at the same time pour drilling water into the rod. It is said to be a method of press-fitting and ejecting it from the tip (lower end), and drilling the hole while blowing up the shavings Ii'+ (slime) to the ground with drilling water.

In the case of B, if the ground or rock is to be drilled, or if it is made up of a hard 1.15 degree layer, or if it is a place where a J/cleat is driven, it is a hard '7? Only the ground part facing the lower edge of the rod, which is removed by T-depth, die-), monodip, etc., is cut in a ring shape, and a cylindrical uncut part in the center [-1] This may cause problems with the drilling water supply, or the water supply pressure may become abnormally high, or in the worst case, the lot may become clogged and drilling becomes impossible. To recover, pull 11 to the -D ground and N
The problem was that it was not efficient and economical because it was necessary to take out the hot water.

Therefore, conventionally, in order to prevent the rod from talking, a digging blade in the shape of a single character, a cross, etc. extending in the lateral direction of the loft was fixedly attached to the inside of the tip of the J-shaped rod, and the cutting blade was fixed to the inside of the tip of the rod. It has been proposed to perform cutting.

By the way, recently, in order to continuously and effectively perform drilling and injection into the target ground, a tip device with an expandable packer and a liquid discharger was installed at the lower end of the outer tube. It is designed so that it can be protruded and retracted, and the tip device is housed inside the rod during drilling, so that it can be retracted when drilling is completed.
lj: Protrude the tip device in advance of the person, expand the backer and block the grout escape route between the drilled hole wall and the lot,
Although a drilling and press-fitting device has been developed that performs injection after a certain time, it is impossible to fix and provide the above-mentioned linear or cross-shaped horizontal drilling blade to this device.

This is because, as can be easily understood, this becomes an obstacle to the protrusion and withdrawal of the drilling blade or the tip device (the problem to be solved by the invention). To prevent condensation or clogging from occurring during drilling operations in an injection device.

(Means for Solving the Problems) In order to solve the above problems, the present invention
The drilling and injection device has a drilling blade in a direction transverse to the outer tube, and is provided so as to be able to protrude from the outer tube and be retracted,
At the time of withdrawal, a horizontal blade member is provided that is fixed in position so that the above-mentioned excavation blade is located approximately between the lower edge of the outer tube and the lower edge of the outer tube, and this horizontal blade member is inserted into the above-mentioned tip device. It is.

(Igokawa) Due to the structure of the 11th century, the horizontal blade part was removed during drilling, and in this state, the hole was placed between the drilling blade and the drilling tip provided on the lower edge of the outer pipe (at 1'I). Since the string, the holder, and the excavating tip work together to scrape off the dirt, etc. at the lower end of the outer pipe, no rod-shaped uncut parts are left behind, and the side blade member is removed when grouting. Since it is made to protrude from the outer tube together with the tip device, it does not interfere with the operation of the tip device in any way.

(Example) The present invention will be explained in detail below with reference to the attached figure "11."

Both Figures 1 and 2 are front views of the device of the present invention, and the - part (outer tube) is shown at 11 in longitudinal section, Figure 1 shows the hole II!7, and Figure 2 shows the Grau) i+: Shows the state of the large bamboo. In the figure, 1 is the outer tube, 2 is the inner tube, 3 is the tip device, and 4 is the horizontal blade member.

The outer pipe 1 acts as a drilling pipe, and therefore has a hard depth, a drilling depth made of diamond, etc. on its lower end surface (the third
(see Figures 5 to 5) are fixed.

An inner tube 2 is fitted into the outer tube 1 at intervals, and this inner tube feeds drilling water and grout to the tip device 3. The inner tube 2 may be constructed as a multi-tube structure, whereby different kinds of chemical solutions can be sent separately and mixed at the tip to form a flash-setting grout and then injected.

A tip device 3 is connected to the lower end of the inner tube 2 via a seal portion 6. The tip device consists of a main body 7 of the tube, into which a packer 8 consisting of an expandable and deflated rubber sleeve is fitted. When the tip device 3 is protruded (Fig. 2), the backer is expanded by being supplied with pressure fluid (for example, pressurized air) supplied to the gap 9 between the inner and outer tubes, and comes into contact with the borehole wall, and the tip The escape route for the grout, which is to be discharged from the tip of the device 3 and penetrated into the ground by 4°L, is closed.

According to the present invention, in the above-mentioned drilling device, a horizontal blade member 4 is provided at the lower end of the tip device 3 via a connecting member 10. This horizontal blade member has at its tip a digging blade 11 extending in a direction across the outer tube 1, and this digging blade is held by a plate-shaped leg portion 12 extending rearward. As is clear from FIG. 1, the horizontal blade member 4 can be withdrawn into the outer tube 1, with the lateral portions of the legs 12 engaging with the vertical slits 13 provided at the lower end of the outer tube 1. is being done. In this retracted position of the horizontal blade member 4, the χ'' method is determined so that the excavation blade 11 is on the side of the lower end surface of the outer tube 1, that is, the surface where the excavation depth 5 is provided. In this case, the excavating blade 11 does not need to be at the same level as the excavating tip 5, and may be shifted forward or backward relative to the depth 5.

As shown in FIGS. 3 to 5, the excavating blade 11 may be formed into a single character shape, a -1 character shape, or a seven character shape, and is preferably made of a tip made of cemented carbide or the like. Also, pickpocket 9) 13
It is preferable that the side portions of the leg portions 12 that are engaged with the leg portions have a shape that widens toward the distal end as shown in the figure, so that mutual engagement can be smoothly and reliably performed.

The lower end portion of the outer tube 1, that is, the drilling tip 5 and the slit 1
It is preferable that the crown 14 is formed by forming the crown 14, which is screwed onto the outer tube body and made removable.

(Effects of the Invention) Since the device according to the present invention has the above-described configuration and function, there is no columnar uncut portion when drilling into clay ground, concrete-cast ground, or rock. The holes can be reliably drilled without any occurrence of holes, and therefore the drilling work can be carried out quickly and continuously, and ground improvement can be carried out in a short period of time.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional front view of the drilling device according to the present invention in the state of drilling, and Fig. 2 is a front view of the same drilling device in the state of drilling 11 holes. 3 is a perspective view of the lower end of the same drilling injection device, FIG. 4 is a perspective view of the lower end in another embodiment, and FIG. 5 is a perspective view of the lower end in yet another embodiment. FIG. Explanation of symbols: 1...Outer tube, 2...Inner tube, 3...Tip device, 4...
・Horizontal blade member, 5...Drilling tip, 8...Packer, 11...Drilling blade, 13...Vertical slit. Patent issued by Toa Grout Industries Co., Ltd.
311 Toatsu Kagaku Co., Ltd. Tonan Kaihatsu Kogyo Co., Ltd. Agent Patent Attorney 1)
``31 Swimming A ``A, ff11, 5 Figure 5 - ζQ-

Claims (4)

[Claims] (1) An outer tube for drilling with a drilling tip attached to the lower edge,
A drilling injection device having an inner tube for liquid feeding fitted inside the inner tube, and a tip device having a liquid discharge port and a packer connected to the tip of the inner tube so as to protrude from the outer tube and be removable. The excavating blade is provided in a direction transverse to the outer tube, and is protruded from the outer tube so as to be removable, and the excavating blade is fixed in position so as to be approximately at the same position as the lower edge of the outer tube when withdrawn. A drilling injection device characterized in that the horizontal blade member is connected to the above-mentioned tip device. (2) The drilling and injection device according to claim 1, wherein the drilling blade extends in a straight line in the diameter direction of the outer tube. (3) The drilling and injection device according to claim 1, wherein the drilling blades intersect at the center of the outer tube and extend in a criss-cross shape. (4) Claims 1 to 3, wherein the digging blade is provided at the tip of a leg extending in the vertical direction, and the leg is supported and guided by engaging with a vertical slit provided in the outer tube. any one of the terms
The drilling injection device described in .