A steel pipe support wedge block pre-tightening and failure prevention device and installation method
A steel pipe support and installation method technology, applied in the field of steel pipe support, can solve problems such as support failure, reduction of the effect of steel support, and wedge-shaped falcon failure, so as to avoid the loss of prestress, improve stability, and avoid reduction Effect
Active Publication Date: 2022-06-24
HOHAI UNIV
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Problems solved by technology
This not only greatly reduces the construction efficiency and the effect of steel support, but also seriously affects the safety of the foundation pit.
[0003] The wedge-shaped falcon is difficult to drive in. Once it pops out, the support will fail, the slope will collapse, and the foundation pit accident will be caused.
The existing steel pipe supports and fixes the wedge-shaped scorpion by hammering it in. Due to the high friction of the steel, it is difficult to feed the wedge-shaped scorpion into the gap to fill it up, which in turn aggravates the reduction of steel pipe support rigidity and the loss of prestress; if the gap is too large If the filling depth of the wedge-shaped falcon is not enough, it may pop out when the axial force suddenly increases, which will cause the support to fail, the slope will collapse, and then cause the foundation pit accident. Now there is a need for a steel pipe support wedge-shaped block pre-tightening and failure prevention device Used to solve the problem of wedge-shaped falcon failure
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[0031] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and cannot be used to limit the protection scope of the present invention.
[0032] In the description of the present invention, it should be understood that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right", " The orientation or positional relationship indicated by vertical, horizontal, top, bottom, inner, outer, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and The description is simplified rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the in...
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The invention discloses a steel pipe support wedge-shaped block pre-tightening and failure prevention device, which is characterized in that it includes a fixing mechanism and a force applying mechanism, the force applying mechanism is connected with the fixing mechanism, the fixing mechanism includes a beam, the The force application mechanism includes a force application rod, which is movably linked with the crossbeam, the position of the force application rod matches the wedge block, the bottom end of the force application rod is in contact with the force transmission block, and the transmission The bottom end of the force block is in contact with the wedge block, and the force application rod is provided with a force application range, and the force application range is used to give the force application rod a continuous load; the present invention continuously applies force to the wedge block through the force application rod on the beam Apply force to slowly push the wedge into the gap to fill the gap, avoiding the reduction of the rigidity of the pipe support and the loss of the prestress, which is conducive to improving the strength of the support.
Description
technical field [0001] The invention relates to the technical field of steel pipe support, in particular to a steel pipe support wedge block pre-tightening and anti-failure device and an installation method. Background technique [0002] The function of the envelope structure of the vertically excavated deep foundation pit is closely related to the support erection time and the structural rigidity. The existing steel supports are usually assembled and assembled by steel pipes with a diameter of 609mm and a wall thickness of 16mm. Although the installation speed is fast and simple and practical, the cross-sectional area is 1 / 30 of the concrete support, resulting in a support stiffness of 1 / 1 of the concrete support. 5. At the same time, it is also reduced by the influence of factors such as steel pipe joints, joint flatness, and filling material compactness. The on-site pre-axial force value test shows that the steel support applies pre-axial force with the assistance of hyd...
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IPC IPC(8): E02D17/04E02D5/76
CPCE02D17/04E02D5/765
Inventor 曹雪山曹怀玉
Owner HOHAI UNIV