JPS5947776B2 - Method for creating a cut slope using a lattice retaining wall - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the creation of cut slopes, and more specifically, to the invention related to the "retaining wall" (Japanese Patent Application Laid-open No. 51-51875) previously filed by the present inventor. The described prefabricated lattice retaining wall for cutting or embankment (Japanese Unexamined Patent Publication No. 48-62205) (hereinafter simply referred to as "lattice retaining wall") and the "anchored lattice retaining wall" used for the lattice retaining wall. ``Joints'' (Utility Model Registration No. 1211523 Utility Model Publication No. 52-16002) (hereinafter simply referred to as ``Joints'')
This article relates to a method for constructing a cut slope using the method.

[Prior art]

Conventionally, when constructing a cut slope, depending on the soil quality of the slope, a wide area of land or a strong retaining wall is required to ensure stability of the slope, but the present inventors invented the above-mentioned lattice-shaped retaining wall and its attached joints as a retaining wall that does not require such a large land area or the construction of a retaining wall that requires a great deal of cost.

However, when constructing a cut slope, in addition to the above-mentioned problems, accidents such as slope collapse such as landslides may occur due to the presence of unexpected strata during cutting work, the slope ground is not solidified, or water is present. There is a problem.

[Purpose of the invention]

An object of the present invention is to provide a method for constructing a cut slope that prevents these accidents during the construction of a cut slope.

Another object of the present invention is to provide a cutting slope construction method that allows construction work to be carried out at low cost without requiring a large area.

[Structure of the invention]

In the present invention, polling holes are vertically drilled at regular intervals along each planned slope shoulder line, and a plurality of vertical members and foundation members connected in series are inserted and fixed into each polling hole. , excavate sequentially from above to the top surface of the planned cut corresponding to the joint of each vertical member, then secure the joint exposed on the ground by driving anchors into the ground, and connect the joints laterally with cross beam members. The joints are then covered with concrete to complete the lattice retaining wall.

〔Example〕

Hereinafter, the present invention will be specifically explained based on embodiments shown in the accompanying drawings.

The method of the present invention uses vertical members, horizontal members, and joints of a lattice-shaped retaining wall, and the lattice retaining wall is
Each vertical member AI, A2 arranged in the vertical direction as shown in FIGS. 1 and 2, disclosed in No. 5.

Core material of A3... al, C2, C3...
...[A1 is a concrete cylinder or a prism (Fig. 2) that exposes both ends of the copper core al and covers the central part] by fitting into intervening connecting rings 3 and connecting them vertically. It is used as a component.

In addition, each horizontal beam member M1゜M is attached to the gutter-like receiving flange portions 6, 6' that protrude 1 2 3 on both sides of the ring between the vertical members A, A, A......
2 Core material ml, m2 ・・・・・・
・[Ml is a concrete cylinder or prism (Fig. 2) that exposes both ends of the core material ml and covers the center part] and connects them in contact with each other, and also connects the core material alta2 of the vertical member. Anchors 5 are driven from the outside through the gap 4 and the opening 7 of the joint 3 into the ground behind the slope or upright surface, and the vertical members A1, A2. A3 ・
After fixing..., each member of the lattice retaining wall with anchors is used to cover the joint 3 with concrete if necessary.

Further, the joint 3 has semicircular ring-shaped flanges 6, 6' protruding from the left and right sides of the cylindrical body 10, or either one of them, as shown in the perspective view of FIG. , a rib 11 is attached to the lower part of the tsuba 6.6', and a cylindrical body 10 is attached.
An anchor mounting hole 7 is bored through from the front side to the back side of the cylindrical body 10, and a columnar body 12 (or a similar ring is inserted) suspended horizontally above or below the opening 7 is inserted into the cylindrical body 10. The required number of anchored lattice retaining wall joints 3 are used.

In addition, this joint 3 has a cross beam member Ml on the lower collar 6, 6' of the semicircular ring shape.

M2 ・・・ Core material town, m2 ・・・
... placed horizontally and placed on top of the concentric part ml, m2
Upper flange 8, 8' to press down from above is attached.

In addition, the upper flange 8, 8' may be fixed by welding the joints depending on the case, or if the cross beam members M, M2, etc. are simply placed on it without welding. There is also.

The anchor 5 is attached to the anchor attachment opening 7 with bolts and nuts, and the vertical column material, the horizontal member, and the anchor are fixed as one body.

The anchored lattice retaining wall and its attached joint 3 have such a structure, and in terms of tosho calculation, the back tosho of the slope is the vertical member to be used. A1. A2. The structure is strong enough to be supported by only A3, and the cross beam members are M19M2...
... is a vertical member A1. A2: A retaining wall that is interposed between the vertical members and functions as an auxiliary material to hold down soil removal between the vertical members and prevent the vertical members from inclining. It is buried underground and used as a retaining wall on a slope or upright surface.

In the cut slope construction method of the present invention, the underground slope configuration line is polled, and the vertical members A1. A2... with the foundation member 9 attached is first buried along the same planned line, and the vertical member A1. A2
Using the joint 3 of . . . as a reference, the vertical member A1. A2: Fix the... and prevent the slope from collapsing while moving downwards one by one.

It begins with the construction work being carried out.

This method of construction will be explained in sequence with reference to FIGS. 5 and 6.

First, the area where the slope is planned to be cut is prepared by cutting the planned shoulder of the slope in advance at the required intervals determined by the softness of the soil at the back of the slope.
Define B'1, C'1... and make the points vertical.

(a) The multiple points A'1+ B'1. C11
...... toward the planned direction determined according to the slope of the upright surface or slope, respectively, to the planned bottom of the slope A'□.

Polling is performed until B'm + C'□...

The depth of the polling is equal to the vertical member A1 of the above-mentioned lattice retaining wall.

A2..., B1. B2......
C5C2...... are connected, the depth is the full length of the foundation member 9 attached, and the vertical member A1. A2 ・
・・・・・・．

B1. B2..., C1, C2...
・Make a poll with a diameter sufficient to allow insertion.

(b) A number of vertical members corresponding to the height of the planned slope for each of the above polling holes A1. A2 ......, B1゜B2 ......, C1, C2 ...... are connected by the corresponding number of joints, and the base member 9 is attached to the base and inserted into the polling hole. insert.

(c) Next, these vertical members A1. A2...
・、B1゜B2 ・・・・・・、C1,C2・・・・
... in the correct position and direction in the polling hole, and after adjusting and fixing it so that the uppermost joint 3 is on the same level surface, inject grout material equivalent to the surrounding volume of the foundation member 9 from each polling hole. Each vertical member A1. A2
......B1. B2 ・・・・・・、C1゜C
2. Fix each of...

In this case, the foundation member 9 is not fixed with grout at first, and the cross beam member M1゜M is placed between each joint 3 of the top or second stage.
2... is fixed or the first stage anchor 5 is driven and each vertical member A1. A2...
.

B1. The foundation member 9 may be fixed with grout after the correct positions of B2, C, C2, and so on are determined.

) Each vertical member A,, A2 ......, B,, B
2..., C1, C2..., the topmost burial point A'B', C'...1*1 1 Fixed cut surface corresponding to the part Excavate to the burial point A'1, B'1
.

At C'1..., each first stage anchor 5 is driven into the back soil to form a vertical member A1. A2......
B1°B2..., C1, C2... are fixed.

If necessary, at this stage, each joint 3 of the first stage may be connected to each cross beam member M12M22M3, and the joints 3 may be welded and/or covered with concrete each time, or Depending on the gradient of the slope, you can do it all at the end or either way.

(E) Next, in the same way, the second stage burial point (A'2).

Excavate up to the planned cut top surface 29 2 corresponding to the part B'C' . . . and bury it at the burial point A″2.
. . . through each anchor hole 7 of each joint 3.
Anchors 5 are cast and fixed up to that part, and if necessary, each joint 3 is connected with each cross beam member M19M2..., or the exposed part is covered and fixed, or at the end it is fixed in its entirety. As stated earlier, you can do either.

(to) Similarly, the third stage burial point A'3゜B'
C'......4th stage burial point A'
4゜39 3 B'C' ......... excavate the cutting surface in sequence, and 4ヲ4 Sequentially drive the anchors 5 of each stage, and then excavate and anchor one by one towards the bottom of the slope. While repeating pouring, and in some cases covering the exposed parts of the cross beam members M19M2... and joint 3, making the slope strong, construction work was carried out by repeating excavation and preparation downwards. I recommend going.

(G) In this way, the final burial point A' at the tail line of the slope
□ 13I□ CI□ ...... excavate up to 3 parts of each joint and cast with anchor 5 to form vertical members A4゜A2
)..., and at each stage, connect and/or joint 3 of the cross beam member M19M2......
Once the exposed parts have been covered with concrete, construction of the lattice retaining wall is almost complete at this stage.

(Force) When connecting the cross beam members M19M2 and/or covering the exposed parts of the joint 3 with concrete, all of these are completed at the end to finish the lattice-shaped retaining wall 1, and then this The construction is completed by finishing the wall surface by inserting concrete plates or vegetation plates or protecting the surface by spraying concrete onto the lattice frame surface as necessary.

Of course, create drainage channels at appropriate locations on the retaining wall. The method for constructing a cut slope using the lattice-shaped retaining wall of the present invention includes excavating and fixing the slope wall surface by installing vertical members A1 buried in advance.
．． A2...

The construction work can proceed by separating the 31 and 2 joints of BB, C1, C2, etc., fixing them in sequence, and excavating them.

〔Effect of the invention〕

Unlike conventional methods, it does not require an extra large area for construction, and by sequentially driving anchors, the retaining wall surface is strengthened and the sloped ground is strengthened, completely preventing disasters during construction such as landslides. However, it is possible to construct a simple and safe slope retaining wall, and it is also economical, requiring no extra costs other than the fixed cost of the lattice retaining wall.

In addition, concrete plates and vegetation plates are inserted against the frame surface.
If expanded, the sloped ground can be further strengthened.

1 Brief description of the drawings Figure 1 is a front view explaining the structure of a lattice-shaped retaining wall with anchors used in the construction method of the present invention, and Figure 2 is an enlarged view illustrating the structure of the joint part used in the same lattice-shaped retaining wall. 3 is a perspective view illustrating the structure of an example of a joint used in a lattice retaining wall, and FIG. 4 is a front view illustrating an assembled state of the lattice retaining wall (the 5 and 6 respectively show a cross-sectional explanatory diagram and a partially cutaway state of a method for constructing a cut slope to explain the order of the method of constructing a cut slope according to the present invention. Explanatory perspective view.

In the figure, 3...Joint, 4...Gap, 6,
6'...Gutter-shaped receiving flange, 7...Anchor mounting hole, 8, 8'...Upper flange, 10...
...Cylindrical body, 11...Rib, 12...
...Column receptor, A1. A2... Vertical member, al
, C2...core material, A'1, B'l...
...Burial point, A'□.

B'□・・・・・・Planned point at the bottom of the slope, M15M2 ・
...Horizontal beam member, ml, m2 ...Core material.

Claims (1)

[Claims] 1. (a) Each point A'l at the required interval on the planned slope shoulder line.
+ B'l + C'l ...... is determined as the burial point of the vertical members of the lattice-shaped retaining wall, (b) From the burial point toward the planned direction of the slope slope, each planned slope bottom point A ′□9 B'm +C'o
The above vertical members up to A1. A2...
..., B, B ...... CC2・
Preliminary 1 2 t
Vertical member AI to a depth equal to the fixed length of I9 and the buried depth of member 9 connected to the lower end of the vertical member. A2 ・・・・・・、B、、B ・・・・・・、C
(c) A plurality of vertical members AI are provided in the polling holes. A2..., B, B..., C1,
C22... and the foundation member 9 connected in series with a plurality of joints 3 are inserted, and each vertical member A1. A2..., B1. B
2..., C1, C2... are placed in the polling holes and fixed in the correct position and direction, then grout is injected into each polling hole and the vertical members A1. A2
......, B, B2...
Fix the foundations of ..., C1゜C2... with grout respectively.) Burying point of the topmost layer of each vertical member A'1
1 B'l + C'1 ...... Excavate to the top surface of the planned cut corresponding to burying point A'1. B'1.
The first stage anchor 5 is driven through the anchor hole provided in the direction perpendicular to the cut top surface at the location corresponding to each joint 3 of C'1..., and each cross beam is inserted between each joint 3 of the first stage. Connect with members M and M... 2 (to) and the following in the same way to the second stage burial point A'3゜B
'3. (C'3...... to the mth stage burial point A'□, (B'□ CI□). 3
(g) Furthermore, the joints 3 connected to the anchors 5 are covered with concrete each time or at the end to finish the lattice retaining wall. A method for constructing a cut slope using a lattice retaining wall. 2 (a) Each point A' at the required interval on the planned slope shoulder line
, B', C'... are the vertical parts 1 1 1 of the lattice retaining wall A1. A2..., B1. B2...,C
1°C2.... (b) From this point in the direction of the planned slope slope, the planned bottom of the slope points A'□, Bl, respectively. C.I. The above vertical members up to A1. A2
・・・・・・、B1゜B2 ・・・・・・、C1
Planned length and length of C...2 Vertical member A1. A2..., B1. B2
....... Foundation member 9 connected to the lower end of C1, C2...
vertical member AI up to the depth plus the burial depth of AI. A2..., B1. B2...,C
1, C2..., and (c) a plurality of vertical members A1.
A2... B, B..., C1, C
2...and 12 and the foundation members 9 connected in series with a plurality of joints 3 are inserted, and (b) each vertical member A1. A2..., B1. B
2..., (CI), (C2)...
After fixing the vertical members A, A2, B1, ... in the polling holes in the correct position and orientation, grout is injected into each of the polling holes. B2
. . . , C1°C2) . . . The base portions of each are fixed with grout, and (e) each vertical member A1. A2
......, B, B2..., C1, C2
The burial point A'1B'1 at the top of... C'1
Excavate to the top surface of the planned cut corresponding to ...... and bury it at A'l, B'1, C'1...
Drive the first stage anchors 5 through the anchor holes provided in the direction perpendicular to the cutting surface at the locations corresponding to the joints 3 of ..., and connect each cross beam member M19M between each joint 3 of the first stage.
2 Connect at ......, and do the same in the same way to the second stage burial point A'3゜B'C'...
The cut surface is sequentially excavated from ... to the mth stage burial point 3 A'□ Bl□l c', ...... and the anchors 5 of each stage are driven, and each Various cross beam members M19M2 between 3 joints...
..., and (g) The joint 3 connected to the anchor 5 is covered with concrete each time or at the end.
1. Insert and expand concrete sheet piles or vegetation boards on the slope or facing plane within the lattice frame consisting of B2..., C, C... and cross beam members M19M22... Or, a method for constructing a cut slope using a lattice-shaped retaining wall, which is characterized by covering the lattice-shaped retaining wall with concrete and finishing the lattice-shaped retaining wall.