JPS6178917A - Construction of foundation pile - Google Patents

Abstract

PURPOSE:To form a construction ground having great bearing capacity by a method in which cement milk as a pile material is mixed with an expansible cement in a given proportion and placed to form a pile, during which period the expansible cement is expanded to fill up the peripheral space of the pile and at the same time to consolidate the surrounding ground of the pile. CONSTITUTION:Cement milk as a pile material is poured into a pit B drilled in the ground A to construct a pile P. When cement milk mixed with 5-10% an expansible cement P' is used in this case, the cement P' is expanded, although the cement tends to contract during the construction period of the pile P, to fill up completely the space between the pile P and the pit and at the same time to strongly consolidate the wall of the pit. The foundation pile having great bearing capacity can thus be formed under the ground, and the mounts of cement milk or mortar to be used can be saved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention utilizes the expansion chip of expanded cement to create a gap between the anti-surrounding soil 1 and the surrounding earth which can be constructed underground. Completely filled with soil around the pile? This invention relates to a method for constructing foundation piles that are more strongly polished and thus have a strong bearing capacity for preparing a site for construction of a/b building.

11 When performing on-site construction such as cast-in-place pits on the JJA construction site, drill holes in advance (drill holes in the appropriate hole foundation with a toilet, and place cement mold in the d7 hole). Foundation piles were constructed by inserting a core material such as H copper before pouring and hardening the piles. During the construction process, the cement material temporarily atrophies before it hardens, that is, during curing, and voids are formed between the cement and the outer wall, resulting in a significant difference in the originally calculated anti-crushing force. It has been found from various experimental results that this occurs.

The present invention is designed to address serious problems such as those described above.

Is it possible to use the expansion chip caused by the nuclear expansion cement during antibody construction by mixing it with a mixing ratio of 100%? A method for constructing foundation piles characterized by light burial and localized compaction 113-w? The gist of the invention is as follows: To explain the elliptical aspect of the present invention, in Fig. 1, the inside of the hole B drilled in the ground is almost completely filled with the cement mortar lC. Expandable cement P' with a change of about 6 chill and 10% is mixed.Therefore, when applying Antibody P, the cement tends to shrink, but on the other hand, the expandable cement P' to be mixed expands and the expandable cement P' is mixed. A powerful foundation pile that completely fills the void r created between the antibody P and the hole wall, and also solidly consolidates the hole wall from the inside, giving it great bearing capacity? It is possible to create it underground. In addition, it is also possible to fill the circumference of the pile with the mortar coring work without mixing expanded cement (P9) into the pile driving in advance. As another example, when driving a prefabricated pile P2 into the Q-shaped pile hole B in Fig. 2, expandable cement P? 1- Filling the gap C with light, as well as antibody P and anti-open ground? It has the effect of consolidating more firmly.

Therefore, the expansion cement will not expand during antibody construction.
cL, antibody circumferential surface? A completely scary space of Kong Zhou Hikai? Of course, is it necessary to completely fill the hole with soil surrounding the hole? It also has the advantage of being able to consolidate and create a stronger ground.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the foundation pile construction method according to the present invention. 21g is the same diagram as above showing another implementation body. O coded explanatory person, ground, B, pile hole, ? , antibody, G, circumferential void p/expanded cement

Claims (1)

[Claims] Expandable cement is mixed into pile driving cement at a blending ratio of approximately 5% to 10%, and the expansion force of the expandable cement is used during antibody construction to fill the voids around the pit and to consolidate the ground around the pile. A distinctive method of building foundation piles.