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Pull rod-bending resistant steel plate combined soil box analog device

A simulation device and combined technology, applied in the fields of foundation engineering, earthquake engineering, material engineering, and civil engineering

Inactive Publication Date: 2010-07-14
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention proposes a hoop-bending steel plate combined soil box specially used for pile-soil indoor model tests, which overcomes the shortcomings of other types of soil boxes in simulating the soil around piles

Method used

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  • Pull rod-bending resistant steel plate combined soil box analog device
  • Pull rod-bending resistant steel plate combined soil box analog device
  • Pull rod-bending resistant steel plate combined soil box analog device

Examples

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Embodiment

[0054] The specific parameters of the pile group-soil interaction prototype described in this example are as follows: the pile group foundation consists of 9 concrete bored piles, arranged in a determinant, the pile length is 58m, the pile diameter is 1.80m, and the pile spacing is 4.5m. The length of the free section of the pile is 5.3 times the pile diameter; the site soil where the high pile cap is located is medium-density medium-sand, and the site soil type is considered as a single homogeneous soil layer, which is medium-density medium-sand, and the internal friction angle φ= 35°, the bulk density is 19.11kN / m 3 . Pile foundations, caps, and pier columns are made of C40 concrete and Class II steel bars. The longitudinal reinforcement of the pile foundation adopts 36Φ28 main reinforcement, the longitudinal reinforcement ratio is 0.86%, the hoop reinforcement ratio is 0.379%, and the protective layer is 6cm thick.

[0055] For the prototype, the length scale ratio of the...

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Abstract

The invention relates to a pull rod-bending resistant steel plate combined soil box analog device, which comprises pile foundations, hoops, a pull rod and a bending-resistant steel plate and a counter-force steel column, wherein each pile foundation is connected with the bending-resistant steel plate through the hoops, screws, internal thread sleeves and the pull rod; the fixed end of the bending-resistant steel plate is connected with the counter-force steel column; a plurality of hoops can be fixed on the pile foundations; the hoops are fixed through the screws and nuts; the outer sides of the nuts are provided with the internal thread sleeves; an expended head at one end of the pull rod is arranged in cavities of the internal thread sleeves connected with the hoops, and the other end of the pull rod passes through a preformed hole of the bending-resistant steel plate and connected with the bending-resistant steel plate through clamp nuts; and the counter-force steel column is connected with a transition steel plate at the bottom of a soil box through welding or bolting. Compared with the conventional soil box, the soil box analog device solves the great problem that confining pressure constraint conditions of model soil under a gravity field of the conventional soil box are hard to be similar to those of undisturbed soil. The soil box analog device has diversified installation modes, reduces technical requirements and site condition restriction of loading equipment and expands the engineering application range of the loading equipment.

Description

technical field [0001] The invention belongs to the fields of civil engineering, material engineering, foundation engineering and earthquake engineering, and in particular relates to a tie rod-bending steel plate combined soil box simulation device for simulating pile-soil interaction. Background technique [0002] So far, there are roughly three types of soil boxes commonly used in indoor model tests: rigid wall boxes, flexible wall barrels, and laminar shear boxes. [0003] 1. Rigid soil box [0004] Rigid soil boxes have walls made of metal or wood that do not provide for shear deformation. Flexible materials such as foam plastics are attached to the inner wall of the box to absorb the waves of the lateral boundary to simulate the boundary of the soil. [0005] This kind of soil box has been adopted in foreign countries in the 1980s. For example, Gohl and Finn (1987) used the hollow aluminum tube as the model pile and dry sand as the model soil in the single pile model ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00E02D27/12
Inventor 袁万城周敉高永
Owner TONGJI UNIV
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