Hollow large-diameter excavated foundation and manufacturing method thereof

Abstract

The invention discloses a hollow hole-digging foundation with a major diameter. The hollow hole-digging foundation with the major diameter comprises a basic main post and a basic wide bottom; the basic main post comprises a basic outcrop and a basic burial depth section, and the basic burial depth section is internally provided with a main post cavity; the basic wide bottom comprises a round table and a bottom cylinder, and the round table is internally provided with a bottom cavity; the main post cavity and the bottom cavity are filled with spoil; main post main reinforcements are connected with cylinder main reinforcements through round table main reinforcements, external stirrups are arranged on the outer sides of the main post main reinforcements, the round table main reinforcements and the cylinder main reinforcements, and erection stirrups are arranged on the inner sides of the main post main reinforcements, the round table main reinforcements and the cylinder main reinforcements. The invention further discloses a manufacture method of the hollow hole-digging foundation with the major diameter. The method comprises the following steps that 1, hole-digging foundation size parameters are initially set; 2, bending moment, shearing force, displacement and corner of the hole-digging foundation are calculated; 3, section size is checked; 4, normal section bearing capacity is calculated; 5, site construction is conducted. According to the hollow hole-digging foundation with the major diameter and the manufacture method thereof, use of foundation concrete and amount of the spoil are effectively reduced, the environment is protected, and the hollow hole-digging foundation with the major diameter can be widely applied to the technical field of electric power engineering.

Description

technical field [0001] The invention relates to the technical field of electric power engineering, in particular to a hollow large-diameter digging foundation and a manufacturing method thereof. Background technique [0002] In recent years, with the development of UHV power grid construction, the load of UHV towers has increased significantly due to the increase in conductor cross-section, clearance, and distance to the ground, and the resulting load on the lower foundation has also increased. For example, 1000kV lines The basic force of the suspension tower reaches 7000kN, the tension tower reaches 15000kN, and the horizontal force is about 1000kN, which is 4 to 5 times the basic force of the 500kV line tower. The undisturbed soil excavated foundation is widely used in transmission lines because of its good technical, economic and environmental benefits. However, under the above loading conditions, the diameter and buried depth of the undisturbed soil excavated foundation...

AI Technical Summary

Problems solved by technology

However, under the above loading conditions, the diameter and buried depth of the excavated foundation in undisturbed soil need to be greatly increased, which greatly weakens its economy and environmental protection.

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