KR20150082152A - Anchor having a fixing device at a side of pressure plate to depress the land slope and method of installing the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soil structure for reinforcing slopes, and more particularly, to an anchor provided with a fixing member on the side of a hydraulic pressure plate for pressing a slope and a construction method for constructing the anchor on a slope.
A friction type fixing member of a steel pipe pipe type integrated with the hydraulic pressure plate is provided on the hydraulic pressure plate side of the anchor, A packer is installed to fix the anchor end side fixing body by press grouting, and then a large pressure plate for pressing the slope is pressed together with a tensile force applied to the tensile member of the anchor together with the pressure plate side fixing body, the secondary packer is inflated, There is provided an anchor provided with a fixing member on the pressure plate side for pressing a slope preventing secondary pressure grouting to prevent loss of an anchor tensioning force.

Description

[0001] The present invention relates to an anchor provided with a fixing member on a pressure plate side for pressing a slope, and an anchor having a fixation member on the side of the pressure plate for pressing the slope,

More particularly, the present invention relates to an anchor provided with a fixing member on a side of a pressure receiving plate for pressing a slope, and an anchor construction method for mounting the anchor on a slope.

In general, cut slopes or embankment slopes often occur in civil engineering works such as roads, railways, embankments, entrance and exit of tunnels, and apartment complexes. Slope and erosion occur in such cut slopes or embankment slopes, and environmentally friendly slope reinforcement methods that are compatible with natural environments have been demanded.

The soil nailing method, which has been conventionally applied by such a slope reinforcing method, has a problem in that the nail needs to be reinforced more than the structure of reinforcing the slope by the frictional force of the nail.

Reinforced concrete retaining walls have been mainly used as another slope reinforcement method. However, it takes a lot of cost and time to install a reinforced concrete structure, and an enormous construction cost is required. Therefore, anchors are installed and installed integrally with retaining walls. However, such a reinforcing method also has a disadvantage in that a large amount of cost is required for the working of the crushed stone and the embankment, and the structure is increased as a whole.

When the slope is cut off, the stress distribution is changed and the groundwater level is lowered and the ground subsides. This phenomenon occurs remarkably in relatively soft soils and weathered rocks. Therefore, even if the anchor is installed while the slope is being excavated and the slope is pressed by the large hydraulic pressure plate, there is a problem that the tension of the anchor is lost due to the settlement of the hydraulic pressure plate with time.

In addition, in the regions where the four seasons are clear, the soil layer is weakened by repeated freezing and thawing, resulting in the problem that the tension plate of the anchor is lost due to the pressure plate being continuously pressed.

An object of the present invention is to solve the above problems of the prior art, and it is an object of the present invention to provide a friction type fixing member in the form of a steel pipe integrated with a pressure plate on the tension side of an anchor, After fixing the front end side fixing member by press grouting, a large hydraulic pressure plate for pressing the slope is pressed together with a tensile force applied to the tensile member of the anchor together with the pressure plate side fixing member, the secondary pressure packer is inflated, And an anchor provided with a fixing member on the side of the pressure receiving plate for pressing a slope for preventing a loss of a tension force of the anchor, and a method of installing the anchor.

In the present invention, the term "fixation member" is referred to as a "fixation member". The fixation member at the right end of FIG. 1 is referred to as a fixation member on the tip side 6, The fixing member with the head is referred to as a fixing plate 5 on the pressure plate side. In the present invention, the soft ground refers to the ground where the pressure plate is settled by the long-term anchor tension due to weathering or weathering of the exposed part of the slope.

In order to achieve the above object of the present invention, the present invention provides an anchor comprising a pressure plate installed for pressing a slope and a tensile member for connecting a paper sheet and a fixing member fixed at the front side by grouting to introduce a tensile force, A first packer installed in the middle of the tensile material to grout and fix the fixture first and a second pressure grove configured to behave integrally with the pressure plate capable of supporting the soft ground slope, And a pressure plate side fixing member which is provided on the pressure plate side.

When the friction type fixture of steel pipe type integrated with the hydraulic pressure plate is installed on the tension side of the anchor, the phenomenon that the soil is repeatedly frozen and thawed in the region where the four seasons are clear is weakened by the deepening of the freezing depth, So that settlement can be prevented from the East Sea.

Even in the case of the soft ground which can not withstand the pressure of the hydraulic pressure plate, the friction type fixing member of the pipe type of pipe has the effect of reinforcing the supporting force of the soft ground by the frictional force.

The effect of preventing the additional settlement of the pressure plate subjected to the continuous compression and the loss of the tension of the anchor by installing a steel pipe type friction type fixing body integrated with the hydraulic pressure plate deeper than the influence range from the slope, .

In addition, the tensile side fixing member has the effect of acting as a nyling member, and the pressure plate is fixed to the friction type fixing member of the pipe type of pipe, so that the positional movement does not occur during tensioning, It is effective.

FIG. 1 is a view showing a state in which a pressure plate is pressed by an anchor provided with a fixing member on a pressure plate side for pressing a slope according to the present invention.
2 is a view showing the pressure plate side fixing member in a separated state.
Fig. 3 is a diagram showing the friction type front end side fixing member of the anchor of the present invention.
Fig. 4 is a cross-sectional view taken along line AA of Fig. 1, and is a sectional view of the position at which the bag base packer is mounted in a state in which the front end side fixing member 6 is fixed by grouting and the pressure plate side fixing body 5 is provided in the perforation hole.
Fig. 5 is a cross-sectional view taken along the line BB in Fig. 1, showing a first injection hose 12, a first hopper injection hose 11, a discharge hose 14, and a tensile member 9 for grouting and fixing the front- ), And a secondary injection hose (13).
Fig. 6 is a cross-sectional view taken along line CC of Fig. 1 showing the front end side fixing member 6. Fig.
FIG. 7 is a view showing a hose cutter installed at an angle of 40 to 50 degrees on a long iron rod, and a hose cutter configured to cut a hose by cutting a hose into a hole when a sharp blade is formed inside a hollow iron plate.
8 is a view showing various embodiments of the pressure plate.

Hereinafter, an anchor according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 8 are views showing the entirety of an anchor 50 according to the present invention in which an anchor is inserted into a perforated hole 22 and grouted to press the pressure plate 1 against a slope.

Fig. 1 is a view entirely showing an anchor 50 according to the present invention. In Fig. 1, a pressure plate 1 installed for pressing a slope is connected to a front end side fixing member 6 fixed by grouting, A primary packer 7 installed in the middle of the tensile material 9 to grout and fix the leading end side fixture 6 first and a primary packer 7 installed in the middle of the tensile material 9, Side fixing member 5, which is configured to move integrally with the pressure-sensitive pressure plate 1 that can be exerted and is fixed by secondary grouting, is joined to the pressure-side pressure-squeezing ring 4 by welding or a coupling means such as a screw And an anchor.

The anchor 50 according to the present invention is characterized in that the anchor head 2 formed on both side ends of the tensile material 9 and the tensile material 9 longer than the length of the perforated hole 22 and the thickness of the pressure plate 1, A hydraulic pressure plate 1 for pressing a slope at the right side surface of the tensile material 9 and an anchor cap 3 for covering the anchor head 2 and the anchor head 3; A pressure plate fixing body 5 which is joined to a pressure plate compression ring 4 fitted in the hole 19 by welding or a coupling means such as a screw and a front end side fixing member 6 which is in contact with the pressure plate fixing body 5 A primary packer 7 positioned at an intermediate position of the tensile material 9 and two shrinking tubes 10 positioned at a certain distance and sandwiched between the tensile material 9 on both sides of the primary packer 7, A second injection hose 13 provided inside the anchor 50 and a second injection hose 13 provided inside the anchor 50 and having a pressure plate fixing member 5 ) On the leading end side The primary packer injection hose 11, the primary injection hose 12, the discharge hose 14 and the secondary packer injection hose 16, which extend over the complex 6, temporarily stopping the packer, and a tubing cutter 21 for cutting the primary injection hose (12).

The tensile material 9 is composed of a single wire or a plurality of wires and is covered with a PE pipe 24 so that the elongation can be smoothly applied even after cement grouting. Herein, it is illustrated that a tensile material 9 composed of four sets is installed.

2, a flange-shaped pressure plate compression ring 4 is coupled to the tip of a steel pipe 18 by welding or by a coupling means such as a screw, so that the pressure of the water pressure applied to the pressure plate hole 19 When the plate compression ring 4 and the fixture in the form of a steel pipe are used to tension the tension member 9 by using the anchor head 2, At this time, the pressure plate compression ring is not necessarily circular, but a square hexagonal shape or the like can be used.

 The steel pipe of the fixing plate 5 on the pressure plate side is formed so as to have a large frictional force by grouting by providing concave and convex portions on the outside, and a steel pipe hole (not shown) is formed in the front end steel pipe from the secondary packer 8 so that the injection material inside the steel pipe is injected into the outside of the steel pipe 17) is formed on the outer side of the non-welded pipe section, and the secondary packer (8) is constituted of a secondary discharge hose passing through the secondary packer injection hose and the packer in the form of a bag packer outside the non-welded pipe section, Respectively. In a further preferred embodiment, the secondary packer is provided with a primary feeder hose 12 and a primary packer feeder hose 11, which are filled with a hose cutter 21 by a hose cutter 21, Cut at a depth of about 2 m from the hole to constitute the pressure plate side fixing body 5 having only the second-order packer.

      3 shows a friction type in which the anchor head 15 fixes the tension member 9 and the fixing member on the outside of the tension member 9 is in contact with the pressure- Various types of fixing members such as a composite type of a fixing member can be applied.

Fig. 4 is a cross-sectional view taken along the line AA of Fig. 1, showing a cross-sectional view of the position where the secondary side bag packer is mounted in a state where the front side fixing member 6 is fixed by grouting and the pressure plate side fixing body 5 is provided in the perforation hole 22. to be.

      Fig. 5 is a sectional view taken along the line BB in Fig. 1, showing a first bag packaging machine for first grouting and fixing the front side fixture 6, a first injection hose 12 and a first packer injection hose 11, A tensile member 9, and a secondary injection hose 13, as shown in Fig.

Fig. 6 is a cross-sectional view taken along line CC of Fig. 1 showing the front end side fixing member 6. Fig.

     7 is a hose cutter 21, which is installed at an angle of 40 to 50 degrees, preferably about 45 degrees, on the long rod 23, and the inner side of the hollowed iron plate is formed with a sharp blade, 12 and the discharge hose 14 are inserted into the hole and pulled out, the injection hoses 11, 12 and the discharge hose 14 are cut and cut. Is used to cut the injection hoses (11, 12) and the discharge hose (14) in the perforation hole (22).

      Fig. 8 is a view showing various types of hydraulic pressure plates 1 such as a square, a cross, and the like, and the cross-shaped hydraulic pressure plates 1 may be connected to each other by a lattice.

      The main technical idea and feature of the present invention is that when the slope is cut, the constrained stress is released, the stress distribution is changed, the ground water level is lowered, and the soft ground is plastic deformed. This phenomenon occurs remarkably in relatively soft soils and weathered rocks. Therefore, even if the anchor 50 is installed while the slope is being excavated and the slope is pressed by the large hydraulic pressure plate 1, the tensile force of the anchor 50 is lost as the pressure plate 1 is depressed with time, .

In addition, in the region where the four seasons are clear, the soil is repeatedly frozen and melted and weakened, so that the tension of the anchor (50) is lost as the hydraulic plate (1)

In order to solve such a problem, a friction type pressure plate side fixing body 5 in the form of a steel pipe pipe integrated with the pressure plate is provided on the tensile side of the anchor 50 to prevent loss of the tension of the anchor 50. [

The primary packer 7 is provided at an intermediate portion of the anchor 50 to fix the anchor end fixing member 6 by press grouting and fix the large hydraulic pressure plate 1 for pressing the slope surface to the pressure plate- The tensile force is applied to the tensile member 9 of the anchor together with the sieve body 5 and is compressed and then the secondary packer 8 is inflated and the secondary pressure grouting is completed.

A perforation hole 22 is formed in a slope having soft ground conditions such as sand and weathered rock and an anchor 50 having a front end side fixing member 6 and a tension member 9 joined thereto is inserted Grouting to the portion where the primary packer 7 is mounted in the middle portion of the anchor 50 for grouting the fixation member 6 at the tip side of the anchor;

Inserting the pressure plate (1) in the tensile member (9) of the anchor and inserting the pressure plate side fixing body (5) into the perforation hole (22) by fitting the tension member (9);

Expanding the secondary packer (8) mounted on the pressure plate side fixing body (5);

Installing the anchor head (2) on the hydraulic plate (1) and tensioning the tensile material (9);

And a second grouting step.

The second embodiment is different from the first embodiment in that the anchor 50 integrally assembling the front end side fixing member 6 with the tension member 9 and the pressure plate side fixing member 5 in a slope is inserted into the perforation hole 22, Expanding the packer to perform grouting;

Screwing the pressure plate (1) after inserting the pressure plate (1) into the fixing member (5)

And tensioning and fixing the anchor tensile material 9 protruding from the hydraulic pressure plate hole 19 by using the anchor head 2.

The above-described pressure plate side fixing body (5) has a pressure plate compression ring (4) welded or screwed in the form of a flange to a front end of a steel pipe, a pressure plate compression ring (4) Side fixing member 5 of the tension member 9 is constructed so as to behave integrally when the tension member 9 is tensioned by the hydraulic jack using the anchor head 2. [

The steel pipe 18 of the fixture body 5 on the pressure plate side fixes the tip steel pipe 18 to the outside so as to increase the frictional force by grouting and to inject the filler inside the steel pipe 18 during grouting, And the secondary packer 8 is constituted by a secondary discharge hose which passes through the secondary packer injection hose 16 and the packer as a bag packer outside the non-welded pipe section, and the primary injection hose 12 And a primary packer injection hose 11 are installed to pass through. In a more preferred embodiment, the primary injection hose 12 and the primary packer injection hose 11, which have been firstly injected with the hose cutter 21, are inserted into the perforation hole 22 by the hose cutter 21, At a depth of about 2 m. By cutting the hoses as described above, the primary packer injection hose 11 and the primary injection hose 12 do not penetrate through the secondary packer 8, thereby constituting the secondary packer 7 simply, (8) can be easily constructed. In the secondary grouting, a temporary packer is installed in a pressure plate compression ring of the pressure plate side fixing body (5) without a discharge hose to inject the grout liquid. The secondary packer 8 may be omitted for the ground in which the pressure plate 1 and the slopes are pressed together during the secondary injection.

The end fixing member 6 can use various conventional fixing members. 3 is a view showing a frictional type as the front end side fixing member 6 of the anchor 50. The front end side anchor head 15 serves to fix the tensile material 9 and the tensile material external to the anchor head 2 The steel pipe type fixing body 20 of the present invention can be applied in place of various types of fixing members such as a pneumatic type, a pneumatic type and a friction type combined type.

The method of designing the anchor should be designed such that the pressure plate and the pressure plate side fixture have a larger supporting capacity than the tensile load of the tensile material, and the tip side fixer should also be larger than the load applied to the tensile material.

1: Hydraulic plate 2: Anchor head
3: Anchor cap 4: Hydraulic pressure ring
5: pressure plate side fixing member 6: front end side fixing member
7: Primary Packer 8: Secondary Packer
9: tensile material 10: shrinkage tube
11: primary packer injection hose 12: primary injection hose
13: Secondary injection hose (inside of anchor) 14: Discharge hose
15: Tip side anchor head 16: Secondary packer injection hose
17: steel pipe hole 18: steel pipe
19: pressure plate hole 20: steel pipe type fixing body
21: Hose cutter 22: Perforation hole
23: long rod 24: PE tube
50: Anchor

Claims (7)

An anchor comprising a tension plate for introducing a tensile force by connecting a pressure plate (1) provided for pressing a slope and a front end side fixing member (6) fixed by grouting,
A primary packer 7 installed in the middle of the tensile material 9 for grouting and fixing the front end side fixing member 6 first and a pressure plate 1 capable of exhibiting a supporting force also on the soft ground slope, The anchor for pressing a slope provided with a fixing member on a pressure plate side is further provided with a pressure plate side fixing body (5) coupled to a pressure plate compression ring (4) fixed by secondary grouting configured to fix the slope.
The method according to claim 1,
Wherein the pressure plate compression ring (4) is coupled to the pressure plate side fixing body (5) by welding or a coupling means such as a screw. The anchor for pressing a slope provided with a fixing body on the pressure plate side.
The method according to claim 1,
Wherein the steel pipe of the pressure plate side fixing body (5) is provided with a steel pipe hole (17) at the tip end side of the steel pipe from the second packer (8) so that the injection material in the steel pipe during grouting is also injected into the outside of the steel pipe An anchor for pressing a slope provided with a fixing body.
The perforation hole 22 is formed on the slope of the soft ground condition and the anchor 50 with the front end side fixing member 6 and the tension member 9 is inserted and then the front end side fixing member 6 of the anchor is grouted Grouting to the portion where the primary packer 7 is mounted in the middle portion of the anchor 50 for carrying out the following steps:
Installing the pressure plate 1 on the tensile material 9 of the anchor 50 and inserting the pressure plate side fixing body 5 into the perforation hole 22 by fitting the tension member 9;
Expanding the secondary packer (8) mounted on the pressure plate side fixing body (5);
Installing the anchor head (2) on the hydraulic plate (1) and tensioning the tensile material (9);
And performing secondary grouting on the pressure plate side fixing member (5). The method of claim 1, wherein the fixing member (5)
The anchor 50 integrally assembled with the tension member 9 and the pressure plate side fixing member 5 is inserted into the perforation hole 22 on the slope according to the site conditions and the primary packer 7 ) To expand and grout:
Screwing the pressure plate (1) after inserting the pressure plate (1) into the fixing member (6) on the pressure plate side,
A step of tensioning and fixing the anchor tensile material 9 projected to the hydraulic pressure plate hole 19 using the anchor head 2 and covering the anchor cap 3:
And performing secondary grouting on the pressure plate side fixing member (5). The method of claim 1, wherein the fixing member (5)
The method according to claim 4 or 5,
The primary packer injection hose 11, the primary injection hose 12 and the discharge hose 14 used are connected to the hose cutter 21 (see FIG. 1) when the primary grouting is performed before the secondary grouting is performed on the pressure- The method according to any one of claims 1 to 5, further comprising the step of cutting the slab with a fixing member on the side of the pressure receiving plate.
The hose cutter 21 according to the sixth aspect of the present invention is installed at an angle of 40 to 50 degrees on the long rod 23 and the inner side of the hollowed iron plate is formed with a sharp blade so that the injection hoses 11 and 12 and the discharge hose 14 Is inserted into the hole and pulled out, the injection hose (11, 12) and the discharge hose (14) are cut and cut so that an anchor for pressing the slope provided with the fixing member on the pressure receiving plate side is formed.

Images