Cone penetration test (CPT) integrated geotechnical packaging bulk pile laboratory model experiment device and method

Abstract

The invention discloses a cone penetration test (CPT) integrated geotechnical packaging bulk pile laboratory model experiment device and a method, and relates to the technical field of soft soil foundation reinforcement. The experiment device comprises a scaled soft soil foundation model, a scaled composite geotechnical packaging bulk pile model, a positioning device, a CPT system, a loading system and a test component. An experiment method comprises the steps that model filling is performed, and a layered filling method is adopted; pile-forming sleeves are placed and filled, gradual pulling-up and vibrating are performed; piling preloading is performed; the CPT system is assembled and CPT is performed; and the loading system is assembled, and static loading test is performed. Theoreticalbasis is provided for the design and application of composite geotechnical packaging bulk piles by testing the deformation by force and pore pressure dissipation of the composite geotechnical packaging bulk piles under fluid-solid coupling conditions and in combination with the CPT to predict the bearing capacity of single piles.

Description

technical field [0001] The invention relates to the technical field of soft soil foundation reinforcement, in particular to a CPT-integrated geotechnically encapsulated bulk pile indoor model test device and method. Background technique [0002] Composite geotechnical encapsulated bulk piles have the advantages of economy, environmental protection and high performance in the field of strengthening weak clay subgrades with undrained shear strength less than 15kPa. In the scheme design of pile foundation, the method of determining the bearing capacity of a single pile is very important. At present, the methods of determining the vertical bearing capacity of composite geotechnically encapsulated loose piles mainly focus on theoretical calculation methods and field static load tests. The current theoretical calculation results often have some discrepancies with the results of the field static load test, and the cost of the field static load test is high. In addition, the rules ...

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Problems solved by technology

Its penetration mechanism can be similar to the construction of composite geotechnical encapsulated bulk piles. The indoor model test combined wi

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