Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Expanding precast pile and construction method for expanding precast pile
The invention discloses a diameter-expanded precast pile and a construction method for the diameter-expanded precast pile. The expanding precast pile comprises a precast pile body and an elastic air bag, the precast pile body is provided with a pile cavity and a drainage channel used for communicating the pile cavity with the outside, the side wall of a precast pile body is sleeved with the elastic air bag, and the elastic air bag is configured to be capable of expanding under the pressure effect of a filling medium introduced along the drainage channel and define a filling cavity with the side wall of the pile body. The construction method for expanding the precast pile comprises the following steps: driving the precast pile into a soil layer; the pile cavity is inflated, so that the elastic air bag is expanded by air pressure to form a filling cavity; and air inflation is stopped, concrete grout is poured into the pile cavity, and the filling cavity is filled with the concrete grout. And the concrete grout in the filling cavity is combined with the precast pile into a whole after being condensed, so that the concrete precast pile with the expanded section is formed in the soft soil, the upper load of the precast pile is effectively transmitted to a deep soil layer, the relative displacement of the precast pile and the soil layer and the settlement amount of the precast pile are reduced, and the bearing capacity of a soft soil foundation is remarkably improved.
本发明公开一种扩径预制桩及用于扩径预制桩的施工方法。扩径预制桩包括预制桩和弹性气囊，预制桩设有桩腔和用于连通桩腔与外界的引流通道，弹性气囊套设于预制桩桩本体的侧壁，弹性气囊被配置为能够在沿引流通道引入的填充介质的压力作用下膨胀并与桩本体侧壁围设形成填充腔。用于扩径预制桩的施工方法为：将预制桩打入土层；向桩腔内充气，使弹性气囊受到气压膨胀形成填充腔；停止充气，向桩腔内灌注混凝土浆，混凝土浆填设于填充腔内。填充腔内的混凝土浆凝结后与预制桩结合为一体，从而在软土中形成具有扩大段的混凝土预制桩，有效地将预制桩的上部荷载传递到深部土层，降低预制桩与土层的相对位移及预制桩的沉降量，显著提高软土地基承载力。
Expanding precast pile and construction method for expanding precast pile
The invention discloses a diameter-expanded precast pile and a construction method for the diameter-expanded precast pile. The expanding precast pile comprises a precast pile body and an elastic air bag, the precast pile body is provided with a pile cavity and a drainage channel used for communicating the pile cavity with the outside, the side wall of a precast pile body is sleeved with the elastic air bag, and the elastic air bag is configured to be capable of expanding under the pressure effect of a filling medium introduced along the drainage channel and define a filling cavity with the side wall of the pile body. The construction method for expanding the precast pile comprises the following steps: driving the precast pile into a soil layer; the pile cavity is inflated, so that the elastic air bag is expanded by air pressure to form a filling cavity; and air inflation is stopped, concrete grout is poured into the pile cavity, and the filling cavity is filled with the concrete grout. And the concrete grout in the filling cavity is combined with the precast pile into a whole after being condensed, so that the concrete precast pile with the expanded section is formed in the soft soil, the upper load of the precast pile is effectively transmitted to a deep soil layer, the relative displacement of the precast pile and the soil layer and the settlement amount of the precast pile are reduced, and the bearing capacity of a soft soil foundation is remarkably improved.
本发明公开一种扩径预制桩及用于扩径预制桩的施工方法。扩径预制桩包括预制桩和弹性气囊，预制桩设有桩腔和用于连通桩腔与外界的引流通道，弹性气囊套设于预制桩桩本体的侧壁，弹性气囊被配置为能够在沿引流通道引入的填充介质的压力作用下膨胀并与桩本体侧壁围设形成填充腔。用于扩径预制桩的施工方法为：将预制桩打入土层；向桩腔内充气，使弹性气囊受到气压膨胀形成填充腔；停止充气，向桩腔内灌注混凝土浆，混凝土浆填设于填充腔内。填充腔内的混凝土浆凝结后与预制桩结合为一体，从而在软土中形成具有扩大段的混凝土预制桩，有效地将预制桩的上部荷载传递到深部土层，降低预制桩与土层的相对位移及预制桩的沉降量，显著提高软土地基承载力。
Expanding precast pile and construction method for expanding precast pile
扩径预制桩及用于扩径预制桩的施工方法
HUANG JUNGUANG (Autor:in) / ZHANG HENG (Autor:in) / LI WEIKE (Autor:in) / LI LEI (Autor:in) / LI JIANBIN (Autor:in) / LIANG YONGHENG (Autor:in) / PENG HAO (Autor:in) / LI JIANJIN (Autor:in)
01.03.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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