Study On Deformation Mechanism And Design Theory Of Embankment Crossing Large-scale Deep Super Soft Soil

In the highway construction line,special soil(rock)sections and unfavorable geological sections are inevitable,of which mud pool sections are rare,especially across deep and large mud pools.When roads built under such ultra-soft soil sites,All the sections may be located in the mud pool.It is necessary to consider the mechanical approach,the roadbed reinforcement in the mud pool,and how to effectively judge and predict the stability of the embankment slope and the deformation value and the settlement value.In view of the deformation characteristics of high-water content,high void ratio,low shear strength and large thickness of flow plastic mud,this paper relies on highway subgrade engineering bulk in the area of large-area deep mud pool,based on shallow stabilization composite foundation construction method,from technology of on-site construction,on-site monitoring,numerical simulation,and design theory,describing the deformation mechanism and design method of embankment of large-area deep super soft soil,including the following main tasks:1.Review relevant literatures at domestic and foreign,summarize and study the current status of acrossing embankments,ultra-soft soil characteristics and reinforcement methods,in-situ mixing and reinforcement techniques,and clarify the research background and significance.2.Relying on the road section of the deep mud pool section in Shaoxing area,according to the thickness and working conditions of the three large mud pools,reinforcing with shallow stabilization+cement mixing pile,shallow stabilization+prestressed pipe pile,full-section shallow stabilization.And carrying out research of construction technology on specific projects.3.Conduct on-site monitoring and observation in different construction sections,using soil pressure box,pore water pressure gauge,layered settling tube,surface sinking board,inclinometer and other equipment to measure and study the settlement deformation of the ground after stabilization.4.The geotechnical finite element software Plaxis was used to simulate the artificial hard shell composite foundation.The effects of different stabilization thicknesses,different pile spacings and the effect of the strength and modulus of the solidified soil on the settlement of the foundation were studied.5.The acrossing embankment is designed from the perspectives of satisfying foundation bearing capacity,controlling embankment settlement and lateral deformation.The bearing capacity of the artificial double-layer foundation is derived from the perspective of the embanklent load.The subgrade damage is divided into the piercing shear failure and the overall shear failure respectively.The settlement of the solidified layer is solved by the principle of minimum potential energy and the lateral deformation of the mixing pile under the surrounding load is discussed..Figure[78]table[8]reference[100]...