Raft foundation bottom soil body void deformation monitoring device

A deformation monitoring and raft foundation technology, applied in foundation structure engineering, foundation structure testing, construction, etc., can solve the problems of affecting the stress characteristics, exposed raft pile foundation, and reduced foundation reinforcement effect, and improve the measurement accuracy. , Improve the rust resistance, and facilitate the measurement effect

A deformation monitoring and raft foundation technology, applied in foundation structure engineering, foundation structure testing, construction, etc., can solve the problems of affecting the stress characteristics, exposed raft pile foundation, and reduced foundation reinforcement effect, and improve the measurement accuracy. , Improve the rust resistance, and facilitate the measurement effect

CN103276755BActive Publication Date: 2015-05-20CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Raft foundation bottom soil body void deformation monitoring device

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, but these embodiments should not be construed as limiting the present invention.

[0021] see figure 1 , the present invention's raft foundation bottom soil hollow deformation monitoring device, including steel plate 1, anchor rod 2, inner steel bar 3, raft steel pipe 4, outer protective pipe 5, auxiliary measuring block 6 and protective cover 7.

[0022] First carry out the construction of the pile foundation 11, and then anchor a horizontally placed steel plate 1 in the foundation soil 9 below the raft 8 through the anchor rod 2. In this embodiment, the steel plate 1 can be square or circular , the side length or diameter is generally 30-40cm; the anchor rod 2 is a short anchor, and the short anchor can be made of smooth round steel bars, or can be made of threaded steel bars, and the lower part needs to be made into a pointed form. 1 are con...

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Abstract

The invention discloses a raft foundation bottom soil body void deformation monitoring device which comprises a steel plate located under a raft and arranged horizontally. An anchoring rod used for being anchored under the raft is arranged on the bottom face of the steel plate, an inner steel bar vertically arranged is fixed on the top face of the steel plate, a raft steel pipe vertically arranged and poured with the raft integrally is sleeved on the outside of the inner steel bar, the outer diameter of the inner steel bar is smaller than the inner diameter of the raft steel pipe, an outer protection pipe fixed on the inside of an embankment is sleeved on the outside of the raft steel pipe, and the outer diameter of the raft steel pipe is smaller than the inner diameter of the outer protection pipe. The monitoring device has the advantages of facilitating tests, being high in measuring accuracy, good in adaptability, good in long-term effectiveness and low in cost, and can be widely applied to the technical field of foundation deformation monitoring.

Description

technical field [0001] The invention relates to the technical field of foundation deformation monitoring, in particular to a monitoring device for void deformation monitoring of soil at the bottom of a raft foundation. Background technique [0002] Reinforced concrete pile-raft structure (pile-slab structure) can be used in projects such as deep and thick soft foundations, collapsible loess foundations, subgrade transition sections, and turnout area subgrades with strict settlement control. Due to its obvious advantages, it has been used in high-speed railway subgrades in recent years It has also been widely used in engineering. [0003] However, when the project site is of underconsolidated foundation soil, filling soil, loose soft soil, collapsible loess, saline soil and other types of foundation soil, with the occurrence of foundation soil settlement and deformation in the later stage, the foundation soil at the bottom of the raft will often appear The void phenomenon of...

Claims

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Application Information

Patent Timeline
20 May 2015
Publication
CN103276755B
IPC
E02D33/00
Inventors
刘坡拉; 张占荣