Deep soft soil foundation pit reinforcement method
A technology for weak soil and foundation pits, applied in excavation, foundation structure engineering, construction, etc., can solve problems such as deformation and early deformation of foundation pits, and achieve the effect of reducing early deformation and controlling deformation
Inactive Publication Date: 2014-04-30
HOHAI UNIV
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[0004] In order to solve the foundation pit deformation and early deformation problems caused by the deformation of the support structure in the deep soft soil foundation pit, the present invention proposes a method for strengthening the deep soft soil foundation pit
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[0017] In order to make the purpose and technical solutions of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0018] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries shoul...
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The invention relates to a deep soft soil foundation pit reinforcement method and belongs to the technical field of foundation reinforcement. Firstly, an area requiring excavation is supported according to standards and divided into two zones which are sequentially marked as a first excavation zone and a second excavation zone from top to bottom, and the first excavation zone is excavated; secondly, the bottom of a foundation pit is reinforced to form a reinforced area, and the second excavation zone is excavated. The reinforcement method includes: piling the reinforced area according to a layout, by means of a high pressure jet grouting pile technology, when a power drill reaches a design depth, jetting curing agent and slowly lifting a drill bit upwards by a grouting pipe, stopping jetting the curing agent when the drill bit reaches an appointed position according to the designed pile length, and then quickly lifting the drill bit upwards. Owing to the deep soft soil foundation pit reinforcement method, influences of deformation of a supporting structure on the foundation pit can be effectively controlled while early deformation during excavation can be reduced, and accordingly stability of the foundation pit can be maintained more economically and effectively.
Description
technical field [0001] The invention relates to the technical field of foundation pit reinforcement, in particular to a method for reinforcing foundation pits in deep and weak soil. Background technique [0002] The traditional foundation pit reinforcement method is to drive piles into the bottom of the foundation pit to restrict the flow of the bottom soil after the excavation of the foundation pit is completed, so as to prevent the bottom of the pit from uplifting. The key of this technical method is that the pile can only play a role when it reaches a relatively hard bearing soil layer, and often only has a control effect on the uplift of the soil mass at the bottom of the foundation pit. In fact, during the excavation of the foundation pit, due to the unloading of the excavation surface, the enclosure wall will have a horizontal displacement under the action of the pressure difference on both sides, and this displacement will cause upward plastic deformation of the botto...
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IPC IPC(8): E02D17/04
Inventor 殷德顺孟瑞繁周超
Owner HOHAI UNIV