JPH0738231U - Back-filling jack for supporting the mountain stop wall - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a back-filling jack for supporting a retaining wall that can be used for changing the distance and between slopes. [Structure] A nut member 2 and a screw shaft 3 are screwed together, and a seat plate 9 is fixed to an end portion of a shaft body that penetrates the nut member 2 and the screw shaft 3 in a retaining manner in the axial direction. A locking hook to the uprising is fixed to the screw shaft, the seat plate 12 is swingably attached to the outer end of the screw shaft 3 with a pin 11, and the nut member 2 and the screw shaft 3 are attached between the mountain retaining wall and the uprising. By extending it, the load of the retaining wall is transmitted to the retina.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a backfill jack for supporting a cliff wall.

[0002]

[Prior art]

 In order to prevent the collapse of the surrounding ground during the construction of the underground structure, a cliff wall is constructed.The cliff wall is designed to support earth pressure by reinforcing it with upsets and beams. In order to support the load of the wall by waving, a member for transmitting the load is interposed between the main pile H steel of the mountain wall and the seat pile and the waving.

[0003] Concrete or steel is generally used as a conventional member to be interposed between the cliff wall and the abdomen.

However, when concrete is used, a curing period must be set until a predetermined strength is obtained, which affects the progress of the work and also requires considerable time and effort for placing concrete and dismantling it. There is.

Further, when steel materials are used for backfilling, since the interval and parallelism are not always constant between the facing pile H steel of the mountain wall and the facing of the upset, many types of members having different lengths and shapes are used. In addition to having to prepare, the only way to install it is by welding, which makes work impossible in rainy weather, and there is also the problem that it must be disconnected with gas.

Therefore, the present invention was made in order to solve the above-mentioned problems, and a single structure can easily cope with a change in the interval, can transmit a load, and requires no labor for construction. It is an object to provide a backfill jack for supporting a cliff wall.

[0007]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention relates to a nut member whose one end is closed and a screw shaft, and the nut member is prevented from coming off from the screw shaft in the axial direction. A seat plate with a hook is fixed to the tip of the shaft that penetrates, and a seat plate is attached to the outer end of the screw shaft with a pin.

[0008]

[Action]

 With the screw shaft and nut member screwed together, insert it between the cliff wall and the upset, and rotate the nut member with the hook locked on the upright to extend the screw shaft and nut member. The seat plate on the side of the nut member abuts against the abutment, the seat plate of the screw shaft contacts the parent pile H steel of the retaining wall, and this seat plate is oscillated by the pin, and the parent pile H steel. By following the surface, the load on the retaining wall can be transmitted in an agitated manner in a tensioned state.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the first example shown in FIGS. 1 and 2, the back-filling jack 1 is a hollow member in which a screw shaft 3 is screwed into a nut member 2 whose one end is closed, and the screw shaft 3 is closed on one end side. The part 4 is formed along the axis, and the shaft body 5 inserted into the hollow part 4 penetrates the end wall 6 of the screw shaft 3 and the end wall 7 of the nut member 2 so as to be movable in the axial direction. The head 8 holds the shaft 5 in the insertion direction so that the shaft 5 can be prevented from coming off, and a disc-shaped seat plate 9 is fixed to the outer end of the shaft 5.

The nut member 2 and the screw shaft 3 contract most when the end walls 6 and 7 are in contact with each other, and are most expanded when the head portion 8 is in contact with the end wall 6, and are screwed together for strength. The amount is being secured.

Pin holes 10 and 10 are provided at the outer end of the peripheral wall of the screw shaft 3 in a direction orthogonal to the axis, and a pin 11 inserted into the pin holes 10 and 10 is used to form a circular plate at the outer end of the screw shaft. A seat plate 12 is attached so as to be swingable.

This seat plate 12 has a pair of hinges 13 and 13 sandwiching the screw shaft 3 fixed to one surface side, the pin 11 penetrates the hinges 13 and 13 and the pin holes 10 and 10, and the seat plate 12 is a pin. It is possible to swing around 11.

A hook 14 is fixed to the outer periphery of the seat plate 9 located on the end portion side of the nut member 2 so as to be angulated.

In the illustrated case, the hook 14 is provided with a plurality of lateral holes 16 at regular intervals on a pipe shaft 15 fixed to the outer periphery of the seat plate 9, and an outer cylinder whose upper end bends is externally fitted on the pipe shaft 15. By vertically connecting the both at the portion of the lateral hole 16, the vertical length can be freely adjusted at the interval of the lateral hole 16.

The nut member 2 has a polygonal outer shape so that the nut member 2 can rotate, and the screw shaft 3 and the screw of the nut member 2 are square screws excellent in load supporting strength.

Next, a second example shown in FIG. 3 shows another mounting structure of the seat plate with respect to the screw shaft 3, in which the end portion of the screw shaft 3 is spherical and the screw shaft 13 of the seat plate 12 is A spherical concave portion 31 with which the spherical surface of the screw shaft 3 is fitted is formed on the surface with which the end portion abuts.

By such fitting of the spherical surface and the spherical concave portion 31, the seat plate 12 can be swung by the amount of the gap of the connecting portion of the pin 11, and the end of the screw shaft 3 contacts the seat plate 12. Since they are supported in contact with each other, the load is not directly applied to the pin 11, and the load supporting force is superior to that in the first example.

The jack of the present invention has the above-mentioned configuration, and as shown in FIGS. 4 to 6, the jack 1 is interposed between the parent pile H steel 22 and the waving ridge 23 on the mountain wall 21 to raise the waving. The hook 14 is hooked on the H steel forming the sash 23, and the jack 1 is erected and attached to the sack 23.

Next, the nut member 2 is rotationally operated to extend the screw shaft 3 and the nut member 2, and the seat plate 9 on the nut member 2 side abuts the upright 23, and the seat plate on the screw shaft 3 side. By tensioning 12 so as to contact the parent pile H steel 22, it is possible to support the cliff wall 21 and to erect its load and transmit it to 23.

FIG. 6 (A) shows a case in which the facing surfaces of the uprising 23 and the parent pile H steel 22 are parallel to each other, and FIG. 6 (B) shows a back-filling jack when the facing surface is inclined. The state of 1 is shown.

As shown in FIG. 6B, when the facing surface is inclined, the seat plate 12 swings about the pin 11 so that the entire end surface is joined to the inclined surface, and the mountain stopper is easily formed. The load of the wall 21 can be transferred to the derrick 23.

[0023]

【effect】

 As described above, according to the present invention, the screw shaft and the nut member are screwed together to allow expansion and contraction, and the seat plates are provided at both ends of the screw shaft. The load of the cliff wall can be supported and transmitted to the abdomen.

[0024] Furthermore, since the hook for locking the abdomen can be positioned between the abdomen and the cliff wall without supporting it by hand, tension operation can be performed easily and efficiently, and the seat on the screw shaft side can be performed. Since the plate can be swung with a pin, both ends will surely bulge and stick to the mountain stop wall even if the abutment and the facing surface of the mountain stop wall are not parallel. Supporting transmission of the stop wall load can be performed.

[Brief description of drawings]

FIG. 1 is a perspective view of a jack according to the present invention.

FIG. 2A is a plan view of a first example of the jack, and FIG.
Is a vertical cross-sectional view of the arrow bb in (A)

FIG. 3A is a plan view showing a second example of the jack,
(B) is a vertical sectional view taken along the line bb of (A).

FIG. 4 is a perspective view showing a usage state of the jack.

FIG. 5 is a vertical sectional view showing a usage state of the jack.

FIG. 6A is a cross-sectional plan view showing a usage state of the jack, and FIG. 6B is a cross-sectional view showing a usage state when the main pile is inclined.

[Explanation of symbols]

 1 Back-filling jack 2 Nut member 3 Screw shaft 5 Shaft body 9, 12 Seat plate 11 Pin

Continuation of the front page (72) Creator Go Yaomoto 44, 227, Hikita, Shinjo-cho, Kitakatsuragi-gun, Nara

Claims (1)

[Scope of utility model registration request] 1. A nut member whose end is closed and a screw shaft are screwed together, and a seat plate with a hook is fixed to the tip of a shaft body that penetrates the nut member from the screw shaft in the axial direction in a retaining manner. Back-filling jack for supporting the retaining wall with a seat plate attached to the outer edge of the.