Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Comprehensive pipe gallery foundation collapse reduction method combining foundation expansion pressure reduction and light backfilling
The invention discloses a comprehensive pipe gallery foundation collapsibility reduction method combining foundation expansion pressure reduction and light backfilling, and belongs to the technical field of shallow-buried open-cut comprehensive pipe gallery construction engineering in collapsible loess district.The method comprises the steps that the type of a pipe gallery and the depth of a foundation pit are determined, drilling and sampling are conducted, collapsibility initial pressure of all loess layers lying below the pipe gallery is obtained, and the collapsibility initial pressure of all the loess layers lying below the pipe gallery is obtained; selecting the minimum initial collapsing pressure Pshm; calculating the self-weight pressure of the light backfill body on the upper part of the pipe gallery foundation surface, the additional load on the upper part of the pipe gallery foundation surface and the foundation stress P of the foundation surface; the foundation stress P of the foundation surface is compared with the minimum initial collapsing pressure Pshm; if P is larger than Pshm, collapsing deformation is reduced in a light backfilling or foundation expansion pressure reduction mode till P is not larger than Pshm; under the conditions that the excavation area of a foundation pit is not enlarged, and the pipe gallery foundation surface and the foundation area are not increased, a bearing plate is arranged on the lower portion of the pipe gallery, and foundation expansion and pressure reduction are achieved by enlarging the width of the bearing plate. Construction is easy and convenient, economical, efficient, environment-friendly and energy-saving, and the problem of collapsible deformation of the comprehensive pipe gallery foundation in the collapsible loess area can be effectively solved.
本发明公开了扩基减压与轻质回填相结合的综合管廊地基湿陷削减方法，属于湿陷性黄土地区浅埋明挖综合管廊建设工程技术领域，包括：确定管廊类型与基坑深度，钻孔取样，获取管廊下卧各黄土层的湿陷起始压力，选取最小湿陷起始压力Pshm；计算管廊地基面上部轻质回填体自重压力和管廊地基面上部附加荷载及地基面基底应力P；比较地基面基底应力P与最小湿陷起始压力Pshm；若P大于Pshm，通过轻质回填或扩基减压的方式削减湿陷变形，直至P不大于Pshm；不扩大基坑开挖面积、不增加管廊地基面与基础面积的情况下，在管廊下部设置承载板，通过扩大承载板宽度来实现扩基减压。施工简便、经济高效、环保节能，能有效解决湿陷性黄土地区综合管廊地基湿陷变形问题。
Comprehensive pipe gallery foundation collapse reduction method combining foundation expansion pressure reduction and light backfilling
The invention discloses a comprehensive pipe gallery foundation collapsibility reduction method combining foundation expansion pressure reduction and light backfilling, and belongs to the technical field of shallow-buried open-cut comprehensive pipe gallery construction engineering in collapsible loess district.The method comprises the steps that the type of a pipe gallery and the depth of a foundation pit are determined, drilling and sampling are conducted, collapsibility initial pressure of all loess layers lying below the pipe gallery is obtained, and the collapsibility initial pressure of all the loess layers lying below the pipe gallery is obtained; selecting the minimum initial collapsing pressure Pshm; calculating the self-weight pressure of the light backfill body on the upper part of the pipe gallery foundation surface, the additional load on the upper part of the pipe gallery foundation surface and the foundation stress P of the foundation surface; the foundation stress P of the foundation surface is compared with the minimum initial collapsing pressure Pshm; if P is larger than Pshm, collapsing deformation is reduced in a light backfilling or foundation expansion pressure reduction mode till P is not larger than Pshm; under the conditions that the excavation area of a foundation pit is not enlarged, and the pipe gallery foundation surface and the foundation area are not increased, a bearing plate is arranged on the lower portion of the pipe gallery, and foundation expansion and pressure reduction are achieved by enlarging the width of the bearing plate. Construction is easy and convenient, economical, efficient, environment-friendly and energy-saving, and the problem of collapsible deformation of the comprehensive pipe gallery foundation in the collapsible loess area can be effectively solved.
本发明公开了扩基减压与轻质回填相结合的综合管廊地基湿陷削减方法，属于湿陷性黄土地区浅埋明挖综合管廊建设工程技术领域，包括：确定管廊类型与基坑深度，钻孔取样，获取管廊下卧各黄土层的湿陷起始压力，选取最小湿陷起始压力Pshm；计算管廊地基面上部轻质回填体自重压力和管廊地基面上部附加荷载及地基面基底应力P；比较地基面基底应力P与最小湿陷起始压力Pshm；若P大于Pshm，通过轻质回填或扩基减压的方式削减湿陷变形，直至P不大于Pshm；不扩大基坑开挖面积、不增加管廊地基面与基础面积的情况下，在管廊下部设置承载板，通过扩大承载板宽度来实现扩基减压。施工简便、经济高效、环保节能，能有效解决湿陷性黄土地区综合管廊地基湿陷变形问题。
Comprehensive pipe gallery foundation collapse reduction method combining foundation expansion pressure reduction and light backfilling
扩基减压与轻质回填相结合的综合管廊地基湿陷削减方法
AN PENG (Autor:in) / SONG HUAJIE (Autor:in) / XU BOWEI (Autor:in) / LIU HAISONG (Autor:in) / YANG YUYING (Autor:in) / WU FARONG (Autor:in)
03.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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