Transverse bar reinforcement rigid-and-soft composite pile reinforced soft soil foundation device and construction method

Abstract

The invention relates to a transverse bar reinforcement rigid-and-soft composite pile reinforced soft soil foundation device. The device comprises a sinking steel pipe, a steel guide rod, cross-shapedspring casing pipes, a precast rebar concrete pile tip, a soft pile, a rigid pile and telescopic members; a pre-buried rebar is arranged in the center of the precast rebar concrete pile tip, and a sinking steel pipe locating groove is formed in the edge of the pile tip; each the telescopic member comprise a transverse bar between mesh, a high-strength spring, a steel gasket and idler wheels, oneends of the transverse bars between mesh are welded to the idler wheels, and the other ends of the transverse bars between mesh are welded to the steel gaskets; one ends of the high-strength springs are welded to the steel gaskets, and the other end of the high-strength springs are connected with the steel guide rod through a solid cushion block and a steel hoop; the telescopic members are arranged in the cross-shaped spring casing pipes, fixed casing pipes of which the centers are provided with small holes are welded to the outer ends of the cross-shaped spring casing pipes, and the small holes are matched with the transverse bars between mesh. The transverse bar reinforcement rigid-and-soft composite pile reinforced soft soil foundation device has the advantages that the bonding strengthof the rigid pile and the soft bar can be effectively increased through the transverse bars between mesh, the synergistic effect of the rigid pile and the soft pile is improved, the bearing force ofa rigid-and-soft composite pile is increased, and the interface shearing strength is increased.

Description

technical field [0001] The invention belongs to the field of foundation reinforcement engineering, and in particular relates to a device and a construction method for strengthening soft soil foundations with transversely reinforced rigid-flexible composite piles, which are suitable for soft soil foundation treatment construction. Background technique [0002] A large number of deep soft soil foundations are widely distributed along the coast of my country. Due to the characteristics of high compressibility and low bearing capacity of soft soil foundations, foundation treatment is usually required before construction, road engineering, etc. The general foundation treatment method is mostly ordinary rigid-flexible composite piles to reinforce soft foundations. This method has the following defects: rigid piles and flexible piles have poor synergy bearing capacity, interface strength is not high, cement mixing piles or cement-soil cannot be reinforced, etc. . [0003] To sum u...

AI Technical Summary

Problems solved by technology

The general foundation treatment method is mostly ordinary rigid-flexible composite piles to reinforce soft foundations. This method has the following defects: rigid piles and flexible piles have poor synergy bearing capacity, interface strength is not high, cement mixing piles or cement-soil cannot be reinforced, etc.

[0003] In summary, the reinforcement of soft soil subgrade with rigid-flexible composite piles has problems such as poor synergistic force bearing capacity and low interface strength, and it is urgent to solve these problems through improved technology

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