Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Collapsible loess foundation strengthening method and constructed variable rigidity ramming extrusion piles
The invention discloses a collapsible loess foundation strengthening method and constructed variable rigidity ramming extrusion piles. A collapsible loess foundation is flattened; different fractionsof gravels are used for preparing filler A; different fractions of gravels, cement and water are used for preparing filler B; a pile hole is drilled and filled with the filler B to a certain height, ramming is conducted, and the process is repeatedly conducted till the distance between the top face of the compacted filler B and the ground meets the requirement; filling of the filler A is conductedto a certain height, ramming is conducted, and the process is repeatedly conducted till the filler A is flush to the ground after compaction, and the first variable rigidity ramming extrusion pile isconstructed; the rest of variable rigidity ramming extrusion piles are sequentially constructed; and after cement is sufficiently hardened, collapsible loess foundation strengthening is finished. Each constructed ramming extrusion pile is formed by fixedly connecting an upper pile body with the large length and a lower pile body with the small length. The properties of the upper pile bodies constructed through the strengthening body are closer to the properties of gravel piles; and collapsibility of loess can be eliminated or relieved on the part close to the ground surface. The lower pile bodies can transmit loads to a hard substratum, and the functions of long and short piles are achieved.
本发明公开了一种湿陷性黄土地基加固方法及建造的变刚度夯挤桩，平整湿陷性黄土地基；用不同粒级碎石配制A填料；用不同粒级碎石、水泥和水配制B填料；钻一个桩孔，就向该桩孔内填充B填料到一定高度，夯击，重复，至夯实的B填料顶面距地面距离符合要求；填充A填料到一定高度，夯击，重复，至A填料夯实后与地面平齐，建成第一根变刚度夯挤桩；依次建造其余变刚度夯挤桩；水泥充分硬化后，完成湿陷性黄土地基的加固。建造的夯挤桩由长度较长的上部桩体和长度较短的下部桩体固接而成。该加固方法建造的上部桩体的性质接近于碎石桩；可以在接近地表部分消除或减轻黄土的湿陷性。下部桩体可以将荷载传递至坚硬的下卧层，起到了长短桩的作用。
Collapsible loess foundation strengthening method and constructed variable rigidity ramming extrusion piles
The invention discloses a collapsible loess foundation strengthening method and constructed variable rigidity ramming extrusion piles. A collapsible loess foundation is flattened; different fractionsof gravels are used for preparing filler A; different fractions of gravels, cement and water are used for preparing filler B; a pile hole is drilled and filled with the filler B to a certain height, ramming is conducted, and the process is repeatedly conducted till the distance between the top face of the compacted filler B and the ground meets the requirement; filling of the filler A is conductedto a certain height, ramming is conducted, and the process is repeatedly conducted till the filler A is flush to the ground after compaction, and the first variable rigidity ramming extrusion pile isconstructed; the rest of variable rigidity ramming extrusion piles are sequentially constructed; and after cement is sufficiently hardened, collapsible loess foundation strengthening is finished. Each constructed ramming extrusion pile is formed by fixedly connecting an upper pile body with the large length and a lower pile body with the small length. The properties of the upper pile bodies constructed through the strengthening body are closer to the properties of gravel piles; and collapsibility of loess can be eliminated or relieved on the part close to the ground surface. The lower pile bodies can transmit loads to a hard substratum, and the functions of long and short piles are achieved.
本发明公开了一种湿陷性黄土地基加固方法及建造的变刚度夯挤桩，平整湿陷性黄土地基；用不同粒级碎石配制A填料；用不同粒级碎石、水泥和水配制B填料；钻一个桩孔，就向该桩孔内填充B填料到一定高度，夯击，重复，至夯实的B填料顶面距地面距离符合要求；填充A填料到一定高度，夯击，重复，至A填料夯实后与地面平齐，建成第一根变刚度夯挤桩；依次建造其余变刚度夯挤桩；水泥充分硬化后，完成湿陷性黄土地基的加固。建造的夯挤桩由长度较长的上部桩体和长度较短的下部桩体固接而成。该加固方法建造的上部桩体的性质接近于碎石桩；可以在接近地表部分消除或减轻黄土的湿陷性。下部桩体可以将荷载传递至坚硬的下卧层，起到了长短桩的作用。
Collapsible loess foundation strengthening method and constructed variable rigidity ramming extrusion piles
湿陷性黄土地基加固方法及建造的变刚度夯挤桩
LYU QINGFENG (Autor:in) / HAN QILIANG (Autor:in) / ZHAO YANXU (Autor:in) / GAO FEI (Autor:in) / GUO LIANXING (Autor:in) / LIU BEI (Autor:in)
23.06.2020
Patent
Elektronische Ressource
Chinesisch
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