JPH0220271Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to a coupling device for a support beam and a pile, which is a temporary structure supporting the end of a horizontal steel pipe sheet pile, used in the construction of an under-track crossing structure.

Problems that the invention aims to solve: Conventional horizontal steel pipe sheet pile end support structures require large-scale work such as reinforcing bar assembly, formwork assembly, and concrete pouring because reinforced concrete piles and support beams are constructed on site. Therefore, the connection between the pile and support beam is also an integral structure made by pouring concrete. Moreover, after the concrete box of the main structure is constructed on site at the bottom of the horizontal steel pipe sheet pile, the unnecessary piles and support beams must be dismantled and removed, which requires considerable effort.

This idea was developed to solve the above-mentioned conventional problems.It uses steel pipe piles and steel support beams, connects them by a simple and reliable means, and when the piles and support beams are removed, the required points can be removed. This can be easily handled by gas cutting, and it is possible to save a large amount of man-hours.

Structure of the invention and its implementation examples The gist of the device for connecting support beams and piles according to this invention is that a steel cylindrical body with a diameter smaller than the inner diameter of the steel pipe pile and a required length protrudes from the lower surface of the steel support beam. This steel cylinder is inserted into a steel pipe pile, and mortar is filled and hardened between the inner wall of the steel pile and the outer wall of the steel cylinder.

The details will be explained based on the illustrated embodiment.

During construction, first, steel pipe piles 1 are driven on both sides of the track A at a predetermined interval, and a support beam 2 made of H-shaped steel or the like is placed on top of the steel pipe pile 1, and the steel pipe pile 1 and support beam 2 are connected to each other. combine. This coupling means is related to this invention. That is, on the lower surface corresponding to the position of the steel pipe pile 1, a steel pipe 3 having a diameter smaller than the inside diameter of the pile is fixed to the lower surface of the support beam 2 by welding or the like, and this steel pipe 3 is inserted into the head of the steel pipe pile 1, A mortar 4 such as mortar or concrete is filled between the inner wall of the steel pipe pile 1 and the outer wall of the steel pipe 3.

Note that ribs 5 are provided on the receiving beam 2 near the above-mentioned joint to prevent local deformation of the beam. Moreover, a drop cover 6 is provided inside the steel pipe pile 1 at a position 2D ₁ to 5D (D is the inside diameter of the pile) from the pile cap, if necessary.

Further, the mortar 4 may be directly filled onto the soil inside the steel pipe pile 1.

By the way, the length L of the steel pipe 3 is set to 0.5D to 2D so that the load can be effectively transmitted from the support beam 2 to the steel pipe pile 1. Further, when the bonding strength is insufficient, deformed reinforcing bars 7 are appropriately attached to the inner wall of the steel pipe pile 1 and the outer wall of the steel pipe 3 in a hoop shape.

If the width of the support beam 2 is equal to or wider than the diameter of the steel pipe pile 1, a mortar injection port 8 and an air vent 9 are provided in the support beam 2.

As described above, both sides of the embankment body, that is, the track A
Temporarily place support beams 2 of the required length on the steel pipe piles 1 on the left and right sides of.

Thereafter, a required number of horizontal steel pipe sheet piles 10 are sequentially connected onto the support beam 2 by joints and inserted. Next, the earth and sand at the bottom of the horizontal steel pipe sheet pile 10 is excavated, and a concrete box for the main body is created within the excavation path. After the box is completed, the joints between each block of the support beam 2 are removed, and the head of the steel pipe pile 1 is used to drop the lid. Gas cut the slightly lower part and dismantle it.

Effects of the invention This invention has the above-mentioned structure, and even if there is a deviation in the pile installation when connecting the support beam and the pile, it can easily absorb the error, and it does not require the assembly of formwork or reinforcing bars, and it does not require the use of mortar, etc. The amount used is small, and therefore the curing period until the mortar hardens can be shortened. Furthermore, compared to conventional reinforced concrete structures, it is easier to construct, dismantle, and remove, making it possible to significantly shorten the construction period.

[Brief explanation of drawings]

Figures 1 and 2 are cross-sectional views showing the outline of the construction state of the under-track crossing structure implementing this idea, and Figure 3
4 are a plan view and a longitudinal sectional view of an embodiment of this invention, and FIG. 5 is a longitudinal sectional view of another embodiment. 1... Steel pipe pile, 2... Support beam, 3... Steel pipe, 4...
...mortars, 5...ribs, 6...drop lids, 7...
...Reinforcing bar, 8...Inlet, 9...Air vent, 1
0...Horizontal steel pipe sheet pile, A...Railway.

Claims (1)

[Scope of utility model registration request] A steel cylindrical body with a diameter smaller than the inner diameter of the steel pipe pile and the required length is protruded and fixed on the lower surface of the steel support beam.This steel cylindrical body is inserted into the steel pipe pile, and the inner wall of the steel pipe pile and the steel cylindrical body are fixed. A beam and pile connection device in which mortar is filled and hardened between the outer walls of a cylindrical body.