A Calculation Method for Passive Earth Pressure of Pile Bottom Deeper than Cement-soil Hidden Bracing Reinforced Solid Foundation Pit

Abstract

The invention provides a method for calculating passive soil pressure of a pile bottom deeper than a cement soil hidden support reinforcement body foundation pit based on ultimate equilibrium conditions for a cement soil hidden support reinforcement mode in a foundation pit passive area. Required parameters are calculated by acquiring the passive soil pressure of the pile bottom deeper than the cement soil hidden support reinforcement body foundation pit, a calculation formula of the passive soil pressure of the pile bottom deeper than the cement soil hidden support reinforcement body foundation pit is obtained through derivation, and the passive soil pressure of the pile bottom deeper than the cement soil hidden support reinforcement body foundation pit is obtained. The method for calculating passive soil pressure of the pile bottom deeper than the cement soil hidden support reinforcement body foundation pit has the advantages that the theoretical property of calculating the passive soil pressure of the pile bottom deeper than the cement soil hidden support reinforcement body foundation pit is strengthened, the reliability of a passive soil pressure result of the pile bottom deeper than the cement soil hidden support reinforcement body foundation pit is improved, and according to the passive soil pressure of the pile bottom deeper than the cement soil hidden support reinforcement body foundation pit, and the reinforcing design of the pile bottom deeper than a cement soil hidden support reinforcement body foundation pit passive area is helped, thereby being conductive to the stability of the cement soil hidden support reinforcement body foundation pit passive area.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a method for calculating the passive earth pressure of a foundation pit with a pile bottom deeper than that of cement-soil concealed bracing reinforcement. 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 ...

AI Technical Summary

Problems solved by technology

Compared with the skirt reinforcement in the passive area of ​​the foundation pit, the failure mechanism of the cement-soil concealed brace reinforcement is much more complicated. On the basis of the current elastic resistance method calculation method, for foundation pits with different cement-soil concealed brace reinforcement forms, the ultimate earth pressure in the passive area All calculations are based on Rankine's earth pressure theory, ignoring whether the width of the passive zone of the foundation pit meets the requirements of Rankine's passive sliding surface, and also not considering whether the sliding surface in the passive zone is continuous in the undisturbed soil and reinforced soil, which is obviously inappropriate. actual

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