A Calculation Method for Passive Earth Pressure of Pile Bottom Level Concealed Cement-Soil Concealed Bracing Reinforced Solid Foundation Pit

Abstract

The invention provides a calculating method for pile bottom flush cement soil hidden support reinforcement body foundation pit passive soil pressure aiming at a foundation pit passive area cement soilhidden support reinforcing form. The calculating method is characterized in that by acquiring parameters required by calculation of the pile bottom flush cement soil hidden support reinforcement bodyfoundation pit passive soil pressure and adopting different calculation formulas according to different conditions, the pile bottom flush cement soil hidden support reinforcement body foundation pitpassive soil pressure is acquired through calculation. The calculating method has the beneficial effects that the theoretical property of acquiring the pile bottom flush cement soil hidden support reinforcement body foundation pit passive soil pressure through calculation is reinforced, the result reliability of the pile bottom flush cement soil hidden support reinforcement body foundation pit passive soil pressure is improved, moreover, a reinforcement design of a pile bottom flush cement soil hidden support reinforcement body foundation pit passive area is assisted according to the pile bottom flush cement soil hidden support reinforcement body foundation pit passive soil pressure, and the stability of pile bottom flush cement soil hidden support reinforcement body foundation pit passivearea is facilitated.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a calculation method for passive earth pressure of a solid foundation pit with flush cement-soil concealed braces at the bottom of piles. Background technique [0002] With the rapid development of the national economy, the pace of urbanization has accelerated significantly. In order to meet the needs of people's daily life, the development and utilization of underground space has become inevitable. More and more foundation pits stand in the city. Many of the foundation pits are located in deep soft soil areas, which undoubtedly brings troubles to the selection of foundation pit support structures. Often, the deeper the embedding depth of the enclosure structure, the greater the deformation. The reason is that The above situation occurs because the shear strength index of soft soil is extremely low, which cannot provide sufficient passive resistance, and the active earth p...

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Problems solved by technology

Compared with the skirt reinforcement in the passive area of ​​the foundation pit, the failure mechanism of cement-soil concealed brace reinforcement is much more complicated. On the basis of the current calculation method of elastic resistance method, for foundation pits with different cement-soil concealed brace reinforcement forms, the passive earth pressure is all according to The theoretical calculation of Rankine's earth pressure ignores whether the width of the passive zone of the foundation pit meets the requirements of Rankine's passive sliding surface, and also does not consider whether the sliding surface of the passive zone is continuous in the undisturbed soil and reinforced soil, which is obviously unrealistic

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