Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Tube-sinking cast-in-situ pile device suitable for expansive soil region and construction method
The invention relates to the technical field of engineering pile construction, in particular to a tube-sinking cast-in-situ pile device suitable for an expansive soil region. The device comprises a valve pile tip, a plug and a retaining ring, wherein the valve pile tip is arranged at the end part of an sunken tube; the plug is placed at the bottom of the sunken tube; the retaining ring is mountedon the outer side of the cast-in-place pile and the height is not lower than the atmospheric influence depth; a cover plate is arranged at the top of the retaining ring and is provided with a circularopening with the diameter not smaller than that of the cast-in-situ pile. The invention also relates to a construction method, which comprises the following steps of: constructing the sunken tube toa designed elevation by adopting a static pressure or power sunken tube method; placing the plug at the bottom of the sunken tube; placing steel bars in the sunken tube, then pouring the concrete to form a cast-in-situ pile, and then pulling out the tube; and sinking the retaining ring into the soil around the pile by adopting the static or dynamic pile pressing method. By sufficiently consideringthe engineering characteristics of expansive soil, the construction efficiency is high, and arrangement is flexible, the method is suitable for cast-in-situ pile construction of various expansive soil layers, and the influence of soil expansion and shrinkage on a pile body can be greatly reduced.
本发明涉及工程桩施工技术领域，特别涉及一种适用于膨胀土区域的沉管灌注桩装置，包括活瓣桩尖、堵头和护环，所述活瓣桩尖设置于沉管的端部；所述堵头放置于沉管的底部；所述护环安装于灌注桩外侧且高度不小于大气影响深度；所述护环顶部设置盖板，所述盖板上开设有直径不小于灌注桩直径的圆形开口。还涉及一种施工方法，采用静压或动力沉管法施工，将沉管施工至设计标高；将堵头放置于沉管底部；在沉管内放置钢筋，然后灌注混凝土形成灌注桩，然后拔管；采用静力或动力压桩的方法将护环沉入桩周土中。本发明充分考虑了膨胀土的工程特性，施工效率高，布置灵活，适用于各种胀缩性土层的灌注桩施工，可大大减小土体胀缩对桩体的影响。
Tube-sinking cast-in-situ pile device suitable for expansive soil region and construction method
The invention relates to the technical field of engineering pile construction, in particular to a tube-sinking cast-in-situ pile device suitable for an expansive soil region. The device comprises a valve pile tip, a plug and a retaining ring, wherein the valve pile tip is arranged at the end part of an sunken tube; the plug is placed at the bottom of the sunken tube; the retaining ring is mountedon the outer side of the cast-in-place pile and the height is not lower than the atmospheric influence depth; a cover plate is arranged at the top of the retaining ring and is provided with a circularopening with the diameter not smaller than that of the cast-in-situ pile. The invention also relates to a construction method, which comprises the following steps of: constructing the sunken tube toa designed elevation by adopting a static pressure or power sunken tube method; placing the plug at the bottom of the sunken tube; placing steel bars in the sunken tube, then pouring the concrete to form a cast-in-situ pile, and then pulling out the tube; and sinking the retaining ring into the soil around the pile by adopting the static or dynamic pile pressing method. By sufficiently consideringthe engineering characteristics of expansive soil, the construction efficiency is high, and arrangement is flexible, the method is suitable for cast-in-situ pile construction of various expansive soil layers, and the influence of soil expansion and shrinkage on a pile body can be greatly reduced.
本发明涉及工程桩施工技术领域，特别涉及一种适用于膨胀土区域的沉管灌注桩装置，包括活瓣桩尖、堵头和护环，所述活瓣桩尖设置于沉管的端部；所述堵头放置于沉管的底部；所述护环安装于灌注桩外侧且高度不小于大气影响深度；所述护环顶部设置盖板，所述盖板上开设有直径不小于灌注桩直径的圆形开口。还涉及一种施工方法，采用静压或动力沉管法施工，将沉管施工至设计标高；将堵头放置于沉管底部；在沉管内放置钢筋，然后灌注混凝土形成灌注桩，然后拔管；采用静力或动力压桩的方法将护环沉入桩周土中。本发明充分考虑了膨胀土的工程特性，施工效率高，布置灵活，适用于各种胀缩性土层的灌注桩施工，可大大减小土体胀缩对桩体的影响。
Tube-sinking cast-in-situ pile device suitable for expansive soil region and construction method
一种适用于膨胀土区域的沉管灌注桩装置及施工方法
LI XIONGWEI (Autor:in)
05.06.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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