JPS58143020A - Slope protection work - Google Patents

Abstract

PURPOSE:To make easier the construction work for protecting a slope as well as to shorten the period of construction work by a method in which form pipes to be freely assembled are set on a slope, and concrete or cement mortar is placed into the form pipes to construct a concrete structure. CONSTITUTION:A form pipe 1 assembled of an upper form 11 and a lower steel plate 14 is set on a slope B, an iron bar 2 is set inside the form pipe 1, and the form pipe 1 is fixed by anchors 3. Then, cement mortar or concrete 4 is placed into the form pipe 1 to construct a concrete structure C, and then the upper part of the form pipe 1 is removed. Also, proper numbers of holes 16 through which cement mortar or concrete 4 is flowed out are drilled in the lower steel plate 14. By this, the loosening of the ground in the initial period can be prevented and the safety of the construction work can be raised.

Description

[Detailed description of the invention] This invention relates to a slope protection construction method.

Conventionally, there are mortar spraying method, masonry method, concrete bowl wall method, slope frame method, and Ankani method as methods for slope protection, but each of these methods has its own drawbacks.

In other words, the Wachimine rule spraying construction method lacks durability, and the masonry construction method and concrete retaining wall construction method require a great deal of labor.
It presents fI & risk and construction costs are high.

In addition, when constructing the slope method, the cut slope is generally very uneven and the work is performed on a slope, so it takes time and money to assemble the formwork, and skilled workers are required to assemble the formwork.

This invention has been made in order to improve the above-mentioned drawbacks, and aims to stabilize the slope by forming a slope on the slope according to the invention.

However, this method is completely new to the conventional method of constructing the slope, and it is easy to construct and can significantly shorten the construction period.
The purpose is to provide a slope protection construction method that can reduce construction costs.

In addition, we can repeat the parts used once for construction [usable,
The purpose is to provide a slope protection method that can reduce construction costs.

Next, the invention will be described in detail based on an example of a real wheel shown in the drawings.

This departure F! AK's slope preservation method 1 is characterized by assembling [a flexible formwork pipe is placed on the slope, concrete or mortar is poured into the formwork pipe, and a concrete structure is assembled.

(2) Layer frame pipe The formwork pipe 1 is constructed by assembling the upper formwork 11 and the lower steel plate 14 which are divided into parts. The upper formwork 11 is a substantially U-shaped member, but other shapes such as a chevron, a semicircle, etc. can be adopted. The upper formwork 11 can be made of various materials such as a steel plate, synthetic resin, and book.

The upper formwork 11 has locking portions 13.degree. 16, which are opposite to each other, each having an L-shaped cross section, formed along the entire length of the lower end of side plates 12.degree.

The lower steel plate 14 is a rectangular steel plate, and its total length is made to be the same as the total length of the upper formwork 11, and its width is made to match the interval between the side plates of the upper formwork 11. Locking pieces 15 and 15 are erected vertically along the entire length of the lower steel plate 14 in one direction, facing each other.

An arbitrary number of mortar and concrete outflow holes 16 are formed in the lower steel plate 14, and are used for leveling mortar formation, which will be described temporarily.

■ Fixing of lower steel plates When implementing the slope protection method according to this invention, first, a plurality of lower steel plates 14 are fixed to the slope.

After installing the anchor 3 on the slope and fixing it by a known method,
The upper part of this anchor 3 is made to protrude from a hole opened in the lower steel plate 14 at an appropriate distance, and the lower steel plate 14 is fixed by means of tight fitting to a screw cut in the upper part of the anchor 3.

Further, at this time, it is possible to apply primary tension to the anchor 5 to temporarily support a slope that is likely to collapse.

■ Arranging reinforcing bars Arranging reinforcing bars 2 on the lower copper plate 14. The reinforcing bars 2 can be arranged easily if they are arranged in advance in a shape that allows several reinforcing bars to be placed on the lower steel plate 14. - For example, four reinforcing bars 2 may be connected integrally by parallel KL'c square bars.

Seal: Installation of upper formwork The upper formwork 11 is installed on the lower steel plate 14.

The locking portions 15.1s of the side plates 12, 12 of the upper humiliation frame 11 are fitted into the locking pieces 15.15 of the lower steel plate. Therefore, the reinforcing bars 2 are housed within the canter frame pipe 1 constituted by the upper formwork 11 and the lower steel plate 14.

The upper part of the anchor 6 is inserted into the opened hole, and the upper part of the upper frame 11 is made to protrude 11ilijK from the upper part of the form 11, and then fixed to a nut or the like.

@ Concrete or mortar 4 inside the formwork pipe 1 when placing mortar etc.
(纂5rjjA).

A place K corresponding to the lower end of the formwork pipe 1 is covered with foundation concrete 6, and concrete or mortar 4 is placed on it.
is poured into the formwork pipe 1 from above. The concrete or mortar 4, which is not of low slump, flows from the top to the bottom and fills the steel pipe 1.

The mortar 4 flows out from the mortar and concrete outflow hole 16 formed on the lower steel plate 14, and becomes leveled mortar 5 that corresponds to the unevenness of the slope.

This K allows the earth and the pipe 1 to be integrated and prevents the steel plate 14 from rusting.

(2) Filling and removing the upper formwork After the mortar 4 and the like have hardened, the concrete structure C is constructed by removing the stopper am frame 11.

The cut-out upper formwork 11 can be used repeatedly for the next construction, and construction costs can be reduced.

By applying secondary tension to the anchors 3 of this concrete structure C, it is possible to resist slopes that are prone to collapse.

By the above-mentioned work, the concrete structure C is constructed horizontally, but it is also possible to form the structure C in a lattice shape as a framework.

Direction Kll intersecting with the existing concrete structure C
Assemble the frame and pour concrete or mortar.

That is, as shown in Fig. 4, concrete structure CK
A horizontal strip 7 is provided that runs parallel to the slope at right angles to the slope.
Install the parallel Km crusher 8 on the 1Itd side of the horizontal strip 7 @ The frame 8 is made of wire mesh, copper plate 1 synthetic resin 9 paper,
The distance between them is maintained by spacers, and the anchors 3 are installed and identified on the slope.

Mortar or concrete is placed between these 8 batons, and a concrete structure C is constructed in the form of a lattice with continuous beams and ribs.

The vertical beams made of hawk-framed pipes 1 resist the main earth pressure, and the structure is excellent in that small-scale earth pressures are resisted by the horizontal beams formed by the castle frame.

Since the slope bonding method according to the present invention has the above-described configuration, the following effects can be obtained.

■ Since it is only necessary to combine the frame pipes, assembly of the frame on site is labor-saving and the construction period can be significantly shortened.

Since it is poured into concrete or mortar frame pipes, the construction time can be significantly reduced compared to spraying.

θ Steel pipes dismantled after concrete etc. harden can be used for further construction, making it possible to reduce construction costs.

Furthermore, this invention is extremely effective as a method for preserving long slopes.

When cutting down a mountain or the like to form a long slope, as shown in No. 5 WAC, the current groundwork is to be cut down step by step from above along the planned excavation line BK.

. . . A method of gradually forming e is adopted.

The problem with these construction methods is the loosening of the ground prior to the construction of slope protection works such as the slope construction method, the concrete retaining wall construction method, the four-rutal spray construction method, and the Ankani method.

In other words, when forming slopes a, b, ......C from above, the initial ground loosens and collapse of the ground may occur during the slope forming work below. be.

In addition, it has been found that initial loosening has a significant impact on long-term slope stability, and it is important to prevent initial loosening of the ground for long-term slope protection.

As described above, when forming a long slope, this invention can prevent the initial loosening of the ground during the slope work, and can provide long-term slope protection after the slope has been formed. The object of the present invention is to provide a construction method for maintaining long slopes that allows surface forming work to be performed extremely safely and to shorten the construction period.

Furthermore, it is an object of the present invention to provide a long slope maintenance method that is easy to construct, does not require highly skilled workers, and can shorten construction fees and reduce construction costs.

Next, the invention will be explained in detail based on the embodiment shown in - ◎ ω In the case of slope m formation and earth retaining stage Skl, when cutting down the ground A and forming a long slope BQ shadow, cutting starts from the upper part of the slope. Slope a, b,...
...C is gradually formed step by step. in this case,
At the same time as cutting down, earth retaining is done on slopes a, b, ... C (6th block).

Earth retaining is performed by installing the lower steel plate I [14 of the formwork pipe 1 on the slope as described above and applying primary tension to the anchor 3. As a pressure plate,
Prevents initial loosening of the ground.

Continuation of the slope formation work.If the upper slope a is earth-retained, the collapse of the slope @a will be prevented, so the lower slopes @b and c will be prevented.

The formation work of d and c can be done safely and quickly (No. 61N)
. Therefore, the earth retaining work on the upper slope is performed sequentially, and the lower slope is formed by repeating the earth retaining work in sequence to form a long-sized method WUB (No. 7 @).

■ Placing concrete, etc. As described above, place reinforcing bars 2. An upper formwork 11 is assembled to form a formwork pipe 1, and mortar or concrete 4 is poured from above to construct a concrete structure C.

The construction of the contour structure C can be carried out in parallel with the earth retaining work and the slope forming work.

Removal of the upper frame s11 After the mortar or concrete 4 in the formwork pipe 1 has hardened, the upper formwork 11 is removed, and a concrete structure C is constructed.

By applying secondary tension to the anchors 5 of this concrete structure C, the slope can be stabilized.

■ Others mentioned above; concrete structure CK formwork 8 by the method described above.
By placing horizontal reinforcements 7 and pouring concrete etc., the vertical beams and horizontal beams are continuous in a lattice pattern; concrete structure C
(Fig. 8).

Since the method of construction according to the present invention has the above configuration, the following effects can be obtained even when working on a long slope.

Φ When forming a slope, a rigid formwork pipe is fixed to the slope with anchors and used as a bearing plate, which prevents the initial loosening of the ground and allows for safe work.

■ In addition, this invention can be applied not only to road slopes and dam slopes, but also to slopes on steep slopes and slopes with crumbling rocks that require an emergency, but special temporary earth retaining equipment is not required for slopes with densely populated houses. Therefore, it is very effective.

[Phase] After forming the slope, construct the concrete replacement structure C using the frame pipe and apply secondary tension to maintain the long-term retention of the surface.

Stabilization can be achieved.

0 In addition, speed of work as mentioned above.

Similar effects such as lower construction costs can be obtained.

[Brief explanation of drawings]

No. 1- is a perspective view of an embodiment of the form pipe used in the slope preservation method according to the present invention, No. 21 II is a perspective view of the assembled state of the frame pipe, and No. ! Figure 1 is an explanatory diagram of the workmanship,
Figure 4 is a perspective view of the construction state, Figures 5, 6, 1w, and 7 are explanatory diagrams of the body thickness when working on a long slope, #! Figure 8 is a completed perspective view. 1...-Frame pipe, 2...Reinforcement bar, S.
... Anchor, 4 ... Mortar, concrete, 11. Self ... Upper frame, 14 ... Lower steel plate. A...Mound, B...Slope, C...
...Concrete structure.

Claims (2)

[Claims] (1) On the slope, install the upper GMM frame and lower steel plate combination frame pipe, arrange reinforcing bars inside the formwork pipe, and fix the above-mentioned concentrated pipe to anchors, and then A construction method characterized by pouring rutal or concrete into the lid frame pipe, constructing the concrete structure, and then removing the upper part of the form pipe. (2) Claim 1 that the lower steel plate has an arbitrary number of shells and concrete spilling holes is defined as 411 mold.
Slope protection method described in section. (S) To form a long slope, we placed a lower steel plate on the slope 11 that had already been formed to apply primary tension to the anchor and retain the soil. After forming the entire long slope and performing earth retaining, attaching the upper 11ffi frame to the lower steel plate, forming the waterfall frame pipe, and pouring concrete or concrete to construct the concrete structure. This is a slope protection method characterized by removing the upper frame after the gauze, gable tar, or concrete hardens and applying secondary tension to the anchor. (The slope protection construction method according to claim 5, wherein the lower steel plate has an arbitrary number of concrete outflow holes.