Regular expanded-base size bag injection bag and bag injection molding method

Abstract

The invention relates to the field of building construction, in particular to a regular expanded-base size bag injection bag. The bag injection bag comprises a slurry bag, an upper partition plate, a grouting pipe, a drainage network, a drainage pipe and a limiting strip; the upper partition plate is arranged at the upper end of the slurry bag; a hole cover is arranged in the middle of the upper partition plate; the upper partition plate is detachably provided with a conveying rod on the periphery of the hole cover; the grouting pipe is arranged on the hole cover; the grouting pipe is communicated with the interior of the slurry bag; the drainage network is arranged on the outer side of the slurry bag and communicated with the drainage pipe through the upper partition plate and the hole cover; the drainage pipe is arranged on the hole cover; a bottom partition plate or a pile shoe is arranged at the lower end of the slurry bag; and the limiting strip is located on the outer side of the slurry bag and hinged to the upper partition plate. The invention further relates to a regular expanded-base size bag injection molding method. According to the regular expanded-base size bag injection bag, the expansion shape of the bag injection bag can be effectively controlled, regularization and optimization of the shape of a expanded head of a pile end can be achieved, soil compaction can be accelerated, the soil compaction range can be expanded, the compaction space can be increased, and the bearing capacity of the pile end and a whole pile is improved.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a bag injection bag and a bag injection molding method with a regular bottom-expanded size. Background technique [0002] The bearing capacity of the expanded bottom pile is high, so people not only make full use of the geological conditions, but also try to create conditions to use the expanded bottom pile. The research shows that the size of the enlarged head space and the construction method of the enlarged bottom pile are different, and the degree of improvement of the bearing capacity is very different. [0003] The construction methods for enlarging the head space include soil extraction method and compaction method. From the point of view of improving the bearing capacity, the compaction method will cause the space of the enlarged head to be compacted laterally, and the lateral compaction is equivalent to adding constraints to the soil below the enlarged head. Theref...

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Problems solved by technology

However, due to the limitation of the compressibility of the soil, the enlarged head space formed by this compaction method is limited.

Moreover, the spatial shape formed by this method is not optimal, and it is difficult to control well, which brings certain uncertainty to the design

Therefore, although this technology has improved the pile bearing capacity to a certain extent, it has not been well promoted and applied.

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