JPH0521540Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field to which the invention belongs) The present invention relates to earth retaining supporters (cut beams).

(Problems of the invention and its features) A guide rail assembly is formed by connecting a pair of guide rails with a plurality of supporters with a length corresponding to the trench width, and as trench excavation progresses, the assembly is assembled. The Mizohori construction method, in which earth retaining panels are placed between adjacent guide rails on both sides, is a well-known method in which earth retaining panels are installed at predetermined intervals along the length of the trench. Attach an end metal fitting with a curved tip and an elastic member, connect the end metal fitting with a pin to a grooved engagement member fixed to the front of the guide rail, and bring the tip into contact with the main body of the guide rail, One in which the elastic member is brought into contact with the front surface of the grooved engagement member (see Utility Model Publication No. 58-38022), and the tip edges of both pieces are formed into a dogleg shape at both ends, and the inner surface of the intermediate piece is Attach a U-shaped end metal fitting with an elastic material fixed to it, connect the end metal piece with a pin to a rectangular connecting member protruding from the guide rail, and connect the tips of both sides of the end metal piece to the main body of the guide rail. At the same time, the elastic material is brought into contact with the front side of the connecting member (Jikko 58
-45320) is also known.

When the supporter tries to tilt upward or downward from its normal position perpendicular to the guide rail, the elastic material deforms and resists this, and eventually the inclined surface on one side of the tip edge touches the guide rail. It is designed to prevent further tilting.
Although it is practically effective, the drawback is that
Since the elastic material is brought into contact with the supporter shaft stopper member (grooved engagement member, coupling member) attached to the guide rail, it is necessary to provide a contact surface of the elastic material on the supporter shaft stopper member. be.

The object of the present invention is to provide a supporter with an elastic material that does not have the above-mentioned disadvantages, and its structural features are as described in the claims of the utility model registration.

In other words, in the earth retaining supporter of the present invention, the end surfaces of the head portions at both ends that are pin-coupled to the guide rail for installing the earth retaining panel, which contact the guide rails, are formed into a gently sloped mountain shape, and the upper and lower An elastic material is embedded in each of the inclined surfaces, and the tip of the elastic material is flush with the top of the chevron, and the elastic material is brought into contact with the main body of the guide rail.

(Description of Examples) In Figures 1 and 2, 1 is a supporter, 2
is a cylinder with a threaded part on the inner surface, 3 is a telescopic cylinder with a threaded part on the outer surface, and the length of the supporter 1 is determined by the rotation of the telescopic cylinders 3 inserted into both ends of the cylinder 2. It is adjustable by expanding and contracting.

A head portion 4 is attached to the tip of the telescopic cylinder 3, and the end surface of the head portion 4 is formed into a gently sloped (about 7°) chevron shape, and the upper and lower sloped surfaces 5, 5 are made of elastic material. 6, 6 are buried, and the elastic material 6,
Each tip of the head portion 6 is flush with the chevron-shaped top portion 7 of the end surface of the head portion 4.

The material of the elastic member 6 is arbitrary, but urethane rubber is suitable. Also, its shape is arbitrary, but
It has a circular cross section, and there are 8 spaces inside to make it easier to deform.
8' (see Figure 3).

The head portion 4 is provided with a horizontal pin hole 9,
The head portions 4, 4 at both ends of the supporter 1, whose lengths are adjusted according to the width of the excavated groove, are inserted between a pair of shaft fasteners 11 protruding from the front of the guide rail 10, and are connected by pins 12. (See Figure 4).

A pair of guide rails 10 are connected to a plurality of supporters 1
As trench excavation progresses, this assembly is successively driven at predetermined intervals in the length direction of the trench, and the adjacent guide rails 10 on both sides are joined together to form an assembly of guide rails 10. An earth retaining panel is inserted in between to form an earth retaining structure. At this time, when the supporter 1 is perpendicular to the guide rail 10, the head portion 4 of the supporter 1
The tip of the supporter 1 contacts the guide rail 10 at three points: the tips of the elastic members 6, 6 and the top of the crest, but if the supporter 1 tries to tilt in either direction up or down from this state, The elastic material 6 on the side deforms and resists this, and eventually the inclined surface on one side of the tip of the head portion 4 hits the guide rail 10, preventing further inclination, so that the assembly of the guide rail 10 is completed. At each stage: when hoisting and installing the assembly in a predetermined position, when driving the assembly by driving the guide rails 10 on both sides alternately, and when earth pressure acts on the assembly of the guide rails 10 from the side. , the deformation of the assembly of the guide rail 10 is effectively controlled, and the construction work can be carried out safely.

(Effects of the invention) Since the earth retaining supporter of the present invention is as described above, deformation of the guide rail assembly is effectively controlled at each stage of construction, and construction can be carried out safely. In addition to this advantage, there is a remarkable advantage that there is no need to provide an abutment surface of an elastic material on the supporter shaft stopper member attached to the guide rail.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a front view, and FIG. 3 is a side view of an example of an elastic material.
FIG. 4 is a partially enlarged, partially sectional side view of the guide rail assembly. DESCRIPTION OF SYMBOLS 1... Supporter, 4... Head part, 5... Inclined surface, 6... Elastic material, 7... Top part, 9... Pin hole, 10... Guide rail,...

Claims (1)

[Scope of utility model registration request] The end surfaces of the head portions at both ends that are pin-coupled to the guide rails for installing the earth retaining panel are formed into a gently sloped chevron shape, and are in contact with the guide rails.
An earth retaining supporter characterized in that an elastic material is embedded in each of the upper and lower sloped surfaces, and the tip of the elastic material and the top of the chevron are flush with each other.