JPH0336370B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION A. Field of Industrial Application The present invention relates to a foundation formwork and method for erecting pillars such as signage poles or road lighting poles into the ground.

B. Conventional technology The method for installing the pillars described above is to
The pillars were inserted and ready-mixed concrete was poured into the holes, and the pillars were temporarily fixed using separate supporting materials until the concrete hardened completely.

C. Problems to be solved by the invention According to the above-mentioned conventional technology, the construction period is long because the support material must be removed after waiting for the ready-mixed concrete to harden completely, and the inner wall of the hole is destroyed when pouring the ready-mixed concrete. There was a high risk that the collapsed soil would deteriorate the strength of the ready-mixed concrete.

D. Means for Solving the Problems The present invention uses quick-drying fluid mortar instead of ready-mixed concrete in order to significantly shorten the construction period required for pillar erection, but the quick-drying mortar is expensive. By mixing it with gravel and reducing its usage, it becomes more practical.

When this quick-drying mortar is dissolved in water, it hardens within minutes, but before hardening it is a fluid with the same viscosity as water, so when poured into gravel, it completely fills the gaps between the gravel. Therefore, unlike ready-mixed concrete, there is no need to stir and mix it with gravel in a separate container before use, increasing work efficiency.

When using the quick-drying mortar, the present invention involves inserting a cylindrical iron plate made of reinforcing bars into an auger excavation hole, inserting a column into the cylindrical iron plate, and pouring gravel around the column before applying the quick-drying mortar. However, since these processes are carried out inside a cylindrical iron plate, there is no need to disturb the soil in the excavation hole as in conventional techniques, and the quick-drying mortar that hardens inside the cylindrical iron plate does not disturb the soil. There is no risk of deterioration.

In addition, the gap between the excavation hole and the outer wall of the cylindrical iron plate is such that quick-drying mortar leaks from the many holes drilled in the cylindrical iron plate, fills the gap, and then hardens. The foundation is made of reinforcing bars, and the columns can be built into the ground with sufficient support through quick-drying mortar.

E Effects and Examples Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 shows a foundation formwork 1 for building columns, and 2 in the figure is a cylindrical iron plate in which a large number of through holes 3 are bored, and the outer peripheral surface of the cylindrical iron plate 2 has a plurality of longitudinal reinforcements 4. are fixed evenly in the axial direction, and a plurality of ring bars 5 are inserted and fixed at appropriate intervals around the vertical reinforcements 4, and the inner diameter of the cylindrical steel plate 2 is set as appropriate from the outer diameter of the column to be erected. The outer edge diameter of the ring reinforcement 5, which is required to have a large diameter and is integrated with the cylindrical iron plate 2 via the longitudinal reinforcement 4, is required to be appropriately smaller than the diameter of the auger excavation hole.

The method for using the foundation formwork 1 for pillar construction starts with inserting it into the auger excavation hole a as shown in Figure 2. First, gravel 7 is poured under the foundation formwork 1 for pillar construction until the required height is reached. Then, pillar b is placed on top of the gravel 7.

Figure 3 shows quick-drying fluid mortar 8 on the gravel 7.
This shows the stage where the gravel 7 section is hardened by pouring it, and then another gravel 7 is packed around pillar b, and quick-drying mortar 8 is poured into the other gravel 7 section as shown in Figure 4. be.

The quick-drying mortar 8 poured in the steps shown in FIGS. 3 and 4 fills the gaps between the gravels 7 and 7, and further leaks out from the through hole 3 of the cylindrical iron plate 2 and connects the cylindrical iron plate 2 with the auger excavation hole a. A foundation is formed that fills the gap between the holes and is in close contact with the auger drilled hole a.

The formed foundation does not come into direct contact with the auger excavation hole a, even when the gravels 7 and 7 are introduced, nor when the quick-drying mortar 8 is poured, and all of them are inside the cylindrical iron plate 2. Because it is carried out in the conventional technique, it is possible to avoid breaking the soil or involving collapsed soil as in the case of pouring ready-mixed concrete, and it is possible to form a pure mixed hardened product of gravel 7, 7 and quick-drying mortar 8. .

In addition, the vertical reinforcements 4 and ring reinforcements 5 that are integral with the cylindrical iron plate 2 are completely covered with the quick-drying mortar 8 leaked from the through holes 3 of the cylindrical iron plate 2 after the quick-drying mortar 8 is filled. There is no risk of corrosion in the soil, and the quick-drying mortar 8 formed in the embedded part of the pillar b has the effect of further strengthening the foundation.

As mentioned above, the quick-drying mortar 8 has the property of hardening in minutes, so if you check the hardening state after pouring it into the gravel 7 placed around pillar b as shown in Fig. 4. This completes all construction work.

Effects of the Invention Effects of the Invention As explained above, according to the present invention, the erection of pillars can be completed in a short time, and it does not take much time to mix it with gravel in advance, unlike when using ready-mixed concrete. is also omitted, greatly increasing work efficiency.

In addition, the effect of the cylindrical steel plate 2 is to sufficiently prevent the collapse of the soil on the side wall of the auger excavation hole a and the mixing of soil into the foundation body, and the vertical reinforcements 4 and ring reinforcements 5 arranged around the foundation This has a reinforcing effect, and the practical effects of the present invention are extremely large.

[Brief explanation of the drawing]

The drawings relate to the foundation formwork for pillar construction of the present invention and its method of use; FIG. 1 is a perspective view of the foundation formwork for pillar construction, and FIG. 2 is a side view for explaining the method of use. FIG. 3 and FIG. 4 are cross-sectional views related to the same explanation. Notes, 1: Foundation formwork for pillar construction, 2: Cylindrical iron plate, 3:
Through hole, 4: Vertical bar, 5: Ring bar, 7, 7: Gravel, 8:
Mortar, a: auger drilling hole, b: pillar.

Claims (1)

[Scope of Claims] 1. A plurality of longitudinal reinforcements are fixed at equal intervals on the outer circumferential surface of a cylindrical steel plate with a large number of through holes, and a plurality of orbicular reinforcements are further fixed at appropriate intervals around the longitudinal reinforcements. Foundation formwork for pillar construction. 2. For pole construction, in which a plurality of longitudinal reinforcements are fixed at equal intervals to the outer circumferential surface of a cylindrical steel plate with a large number of through holes, and a plurality of ring reinforcements are further fixed at appropriate intervals around the longitudinal reinforcements. The foundation formwork is inserted into the auger excavation hole, the pillars to be erected are inserted into the cylindrical iron plate, the gap between the pillar and the cylindrical iron plate is filled with gravel, and quick-drying fluid mortar is poured into the gravel gap and the cylindrical iron plate. A method of using a foundation form for building a column, which is characterized by filling the gap between an iron plate and an auger excavation hole, solidifying it in a short time, and building a column.