JPS5873623A - Sheathing work for excavated trench and sheeting therefor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an earth retaining method and an earth retaining frame for completely constructing an earth retainer during trench excavation at an open cut site.

Conventionally, when a trench of 2 to 3 meters was excavated for burying gas pipes, sewer pipes, etc., sheet piles (mainly lightweight steel sheet piles) were built along the inner wall of the trench for earth retention. Attach a rack to the top and hold the sheet piles by stretching struts.

By the way, in this earth retaining method, in order to erect the sheet pile vertically against the inner wall of the trench after excavating the trench, it is necessary for a person to enter the trench and push the sheet pile. After construction, a person must enter the trench to attach the racks to the sheet piles and stretch the beams. Therefore, soil during these operations. The sand may collapse, creating a risk of personal injury. .

The present invention has been developed in view of the above circumstances, and is an earth retaining method that can reliably prevent earth and sand from collapsing during the work of inserting sheet piles, and is also capable of retaining earth and earth in a similar manner to earth retaining using cut beams. It is intended to provide a framework for retaining land.

According to the present invention, the earth retaining frame is suspended and held in an excavated trench by installing jacks between the ends of sheet pile retainers facing each other in one or more stages at appropriate intervals. A sheet pile is built between the inner wall of the excavation trench and the sheet pile holding material of item 111, earth retaining frame, and then the jacks of the earth retaining frame are extended and the sheet pile is supported by the sheet pile holding material. It is something to do.

Furthermore, the earth retaining frame according to the present invention includes at least a pair of opposed sheet pile retaining members suspended by wire ropes;
This consists of a jack stretched between the opposing ends of the sheet pile pressers.

An embodiment of the earth retaining method according to the present invention will be described below with reference to the drawings. As shown in FIG. 1, for example, #I#1 of a required width is manually dug on a road where a gas pipe is to be buried. Next, the connecting fittings 2 of the square steel pipes shown in Fig. 2 are hung horizontally with wire ropes 3 in two stages, upper and lower, at appropriate intervals.
Figure 1 b6c with a spacing of P9I'll in the longitudinal direction of
As shown, the connecting fitting 2 is held by being arranged opposite to the inner cylinder wall of <11, and the wire rope 3 is fastened and fixed to a suspension holder 4 of a square steel pipe that spans the opening edge of the groove 1. Then, between the connecting fittings 2 in the longitudinal direction of the groove 1 and the ends of the sheet pile holding material 5 made of a square steel pipe shown in FIG. 7, and the retaining frame 9 formed by connecting and holding the bearing fittings 7m at both ends to the ends of the sheet pile presser 5 with pins 8 is suspended as shown in FIG. 1C. Next, the end portions of the connecting fittings 2 and the sheet pile pressing members 5 of the retaining frame 9 are fitted together, and connected to the pins 8. Next, a sheet pile, for example, a lightweight steel sheet pile 1o, is inserted between the inner wall of the groove 1 and the sheet pile holding member 5, as shown in FIG. 1dK. Next, as shown in Fig. 1C, groove 1 is further dug MIJ while pushing 1° of lightweight steel sheet pile.
When the excavation is completed to a predetermined depth as shown in FIG. 1f, the jack 7 is extended and the lightweight steel sheet pile 1o is supported and retained by the sheet pile holding member 5 as shown in FIG. 3. Then, the square steel pipe suspension support 4 is removed with a remover as shown in FIG. 1g.

・：：［．

Note that this example is an earth retaining method for a relatively deep excavation trench, but in the case of a shallow excavation of 811 m, manual digging is not carried out, but a trench 1 is first excavated to a predetermined depth, and an earth retaining method is installed in this trench 1. After forming the retaining frame 9 and erecting the lightweight steel sheet piles 10 between the sheet pile retaining material 5 of the retaining frame 9 and the inner wall of the groove 1, immediately extend the jacks 1 of the retaining frame 9 to remove the sheet piles. It is preferable to support the lightweight steel sheet piles 10 with the holding members 5. In addition, the retaining frame 9
If there is no need to extend and connect the groove 1 in the longitudinal direction, the connecting fitting 2 may not be used.

As described above, in the earth retaining method of the present invention, the earth retaining material is formed by stretching the jacks 7 between the ends of the sheet pile retaining materials 2 which are arranged in upper and lower stages and facing each other on the inner wall of the excavated trench 1. Since the holding frame 9 is held in a hanging manner, the lightweight steel sheet pile 10 can be erected using the retaining frame 9 as a guide. This eliminates the need for humans to enter the trench and hold down the sheet piles in order to erect the sheet piles vertically and tightly against the inner wall of the trench, as was done in the past. The occurrence of accidents can be avoided.

- In addition, when supporting the lightweight copper sheet pile 10 after digging the groove 1 by hand before pushing in the lightweight steel sheet pile 10 that has been erected and making it to a predetermined depth, or when supporting the lightweight copper sheet pile 10,
Immediately after installing lightweight steel sheet piles 10 on the inside wall of
When supporting the sheet piles 10, a person enters the trench 1 to extend the jacks 7, but at this time, even if the earth and sand begins to collapse, the lightweight steel sheet piles 10 are held in the retaining frame 9. Since it does not fall down and the collapse of earth and sand can be reliably prevented, the safety of people working in the trench 1 can be ensured.

Furthermore, after the gas pipe is laid in trench 1, the earth retaining frame 9 can be removed and retained in the next excavated #11 for reuse, so the earth retaining method accompanying trench excavation can be carried out smoothly and efficiently. be able to.

In addition, the earth retaining method of the present invention costs the same as the conventional earth retaining method that uses sills and struts, so there is no need for special safety measures.

Furthermore, since the retaining frame 9 is suspended from above the groove 1 and placed inside the groove 1, it is extremely easy to position the retaining frame 9 horizontally, and the 100 lightweight steel sheet piles can be held securely. I can do it.

In the earth retaining method of the present invention, the earth retaining frame 9 formed in the excavation #1!1 is designed to shorten the long field of the sheet pile holding material 5 for strength, so the jacks 7 at both ends are in the longitudinal direction of the groove 1. Although the spacing is short and it is difficult to lay a long pipe, it is possible to easily lay a long pipe by directly and rigidly connecting the retaining frames 9 to each other and removing the intermediate jack 7. To illustrate and explain some specific means, the earth retaining frame 9 shown in FIG. At the same time, a connecting plate 13 is provided at one end of the jack 7 at both ends, and this is removably connected to a connecting plate 13' provided on the inner surface of the end of one sheet pile holding member 5, and the other end of the jack 7 is A fork 14 is provided on the holder, and this is connected to a bearing plate 15 provided horizontally on the inner surface of the end of the other sheet pile holding member 5 with a pin 16 and fixed with a stop pin 17. Reference numeral 18 denotes a projection pile provided on the inner surface of the sheet pile holding material 5.

When the earth retaining frame 9 is formed in the excavated groove 1 and the earth is retained, in order to bury a long gas pipe in the groove 1, the retainer is fixed with a wire rope (not shown) as shown in Fig. 3. 11, and the adjacent ones of the nine earth quality holding frame 9 are pressed in advance.
When the long gas pipe is suspended from the bottom of the groove 1 by abutting the 7 flanges 12 on the end faces of the filler material 5 and firmly connecting them as shown in the figure,
Remove the connection plate 13 at one end of the intermediate jack 1 of the joined retaining frame 9 from the connection plate 13' of the sheet pile holding member 5, remove the stopper 11 of fork No. 1 at the other end, and hold it horizontally as shown by the chain line. ie, in the longitudinal direction of the groove 1 to open it. In this way, the long gas pipe can be smoothly inserted into the groove 1.
It can be hung and laid at the bottom of the bed.

The retaining frame 9 shown in FIG. 5 has a connecting plate 19 provided on the end surface by bending both ends of the sheet pile retaining material 50, and connecting plates 19 on both sides between the connecting plates 19 facing each other. - A jack 1 with a groove 19 is removably attached, and a handle 1 for drawing out is attached to the inner surface of the sheet pile holding material 5.
8, adjacent earth retaining frames 9 have reinforcing connecting rods 20 superimposed on sheet pile holding members 5, and bolts 21
．． They are connected by tightening with a nut 21'.

When this earth retaining frame 9 is formed in the excavated groove 1 and the earth is retained, in order to bury a long gas pipe in the groove 1, wire lobes (not shown) are used to secure the retainer to a beam as shown in Fig. 3. Adjacent pieces of earth retaining frame 9 held at 11 are rigidly connected in advance with reinforcing connecting rods 20 as shown in the figure, and a long gas pipe is suspended at the bottom of pipe 1. At the same time, the earth retaining frame 9.9
Remove the jack 1 in the middle and open it.

In this way, a long gas pipe can be smoothly suspended and laid at the bottom of the trench 1.

The retaining frame 9 shown in FIG. 6 is constructed by fixing the connecting strips 22 of the connecting rods 20 shown in FIG. 21. Natsuto 2
Tighten it at 1' until it is firmly held. The image output handle 18 is provided on the upper surface of the sheet pile holding member 5.

In order to bury a long gas pipe in the trench 1 when this earth retaining frame 9 is formed in the excavated trench 1 to retain the earth, the same work as in the case of the earth retaining frame 9 shown in Fig. 5 is performed. The jack 7 in the middle of the joined earth retaining frames 9, 9 is removed and opened. In this way, the long gas pipe can be smoothly suspended and laid at the bottom of the groove 1.

In particular, in the case of the earth retaining frame 9 shown in FIGS. 5 and 6, since the adjacent earth retaining frames 9 can be connected with appropriate distance from each other by the reinforcing connecting rods 20, the length of the earth retaining frame 9 to be laid at the bottom of the groove 1 is Even if the gas pipe is longer, the opening can be made longer so that it can be hung down.

Although the sheet pile holding member 5 of the earth retaining frame 9 in each of the embodiments described above is made of a square steel pipe, it is not limited to this and may be made of a shaped steel.

As described in detail above, according to the earth retaining method and earth retaining frame of the present invention, there is no need for a person to enter the trench and hold down the sheet piles during the installation work of sheet piles during trench excavation, and the earth retaining frame is The work of extending the jacks to hold down the sheet piles with the sheet pile holding material can reliably prevent collapse of the jack, so it is safe for people to work inside the trench. Since it is composed of a holding material and a jack disposed between opposing ends, it can be carried by hand without requiring heavy machinery. The earth retaining frame can be used as a hanging type in the J groove of the excavation groove, so it can be used for other purposes.
The earth retaining method accompanying primary trench excavation can be carried out smoothly and efficiently. Moreover, the earth retaining method of the present invention does not require the conventional retaining method.
Since the cost is the same as that of the earth retaining method using strut construction, it has excellent effects such as no need for special safety measures.

Figure 1 1 to g are non-explosion, 6□ in excavation by fJA
1 method. - F. ENG'I$l:"It ys < f figure, 2nd
Components of the earth retaining frame used in the 1-layer earth retaining method ^♂
,' - A perspective view shown in Figure 3 is a perspective view of the state shown in Figure 1 f.
, FIG. 4, FIG. 5, and FIG. 6 are perspective views showing how adjacent pieces of another example of the earth retaining frame used in the earth retaining method of the present invention are connected.

DESCRIPTION OF SYMBOLS 1... Groove, 2... Connecting metal fitting, 3... Wire loop, 4... Hanging receiver, 5... Sheet pile holding material, 6... Pin, 7... Jack, 7a・・・
・Bearing bracket, 8... Pin, 9... Earth retaining frame,
10...Light steel sheet pile, 12..., flange,
13, 13'... Connection plate, 14... Fork, 15... Bearing plate), 16...
Pin, 17... Stop pin, 18... Hanging type handle,
19.19'...Connection grade, 20...
Reinforcing connecting rod, 21... Bolt, 21'... Nut, 22... Connecting band plate.

Applicant: Nippon Steel Corporation Applicant: Nippon Steel Materials Industry Co., Ltd. □− (a) (b) (9)

Claims (1)

[Claims] Jerky tensioning and retaining of stagnation between the ends of a pair of sheet pile retainers facing each other in one or more stages with appropriate intervals along the inner wall of an excavated trench. The plan is to maintain the projecting frame horizontally, firstly insert the sheet pile between the inner wall of the excavation S1m and the sheet pile retainer, then extend the jack and support the sheet pile with the sheet pile retainer. Earth retaining method for trench 1. 2) An earth retaining frame in an excavation trench consisting of at least a pair of opposing sheet pile holding members held by wire ropes and a jack stretched between the ends of the opposing sheet pile holding members.