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Bi-directional supporting system deformation monitoring and compensating device and construction method

A deformation monitoring and support system technology, applied in the direction of measuring devices, optical devices, excavation, etc., can solve problems such as difficulty in ensuring safe construction of deep and large foundation pits, difficulty in ensuring torque, and affecting the stress safety of steel support systems. Long side effect, avoid displacement error, ensure the effect of axial force

Pending Publication Date: 2018-07-31
SHANGHAI CONSTR NO 1 GRP
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Problems solved by technology

[0002] Nowadays, the fixed end of the two-way steel support system is generally fixed at the purlin, and the prestress is added to one end of the active end to ensure the force of the system, and the steel support system has been completely erected before the prestress is applied. The steel support system is still applicable, but it is difficult to guarantee the torque of the entire steel support body by applying prestress to one end of the super-long two-way steel support, especially the displacement deviation and torque generated at the cross joint of the two-way support are large, which affects the steel support system. It is difficult to guarantee the safe construction of deep and large foundation pits. Therefore, it is necessary to develop a new steel support system and construction technology that can simultaneously apply prestress at both ends to eliminate the torque on the steel support. The impact of system construction

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  • Bi-directional supporting system deformation monitoring and compensating device and construction method

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Embodiment 1

[0031] Combine below figure 1 and figure 2 The composition of the bidirectional support system deformation monitoring and compensating device of the present invention will be described in detail.

[0032] Such as figure 1 and figure 2 As shown, this embodiment discloses a two-way support system deformation monitoring and compensation device, including a cross joint 1, a steel support 2 and an active end 3, and the steel support 2 and the active end 3 are arranged symmetrically on both sides of the cross joint 1, and the steel support 2 It is composed of a number of steel support standard sections (not shown) connected end to end in sequence; one end of the active end 3 is fixedly connected to the steel support 2, and the other end of the active end 3 is connected to the purlin 4 of the foundation pit through the embedded part 12; it also includes The synchronous control device 11, the synchronous control device 11 is arranged on the cross joint 1, the synchronous control ...

Embodiment 2

[0038] Please continue to refer figure 1 and figure 2 , the present embodiment provides a construction method of a two-way support system deformation monitoring compensation device, the construction method includes the following steps:

[0039] Step 1. Excavate the earthwork of the foundation pit from the middle to both sides, and form opposite braces and diagonal braces in turn: During the excavation process of the foundation pit, excavate the earthwork in the middle of the foundation pit first to form the vertical (or horizontal) opposite braces in the middle. Brace, apply prestress to ensure that it bears force against the brace, and reduce the effect of the long side of the foundation pit; then excavate from the middle to both sides to form a horizontal (or vertical) brace of the foundation pit, and apply prestress; finally excavate the foundation The earthwork at the corner of the pit is formed to form a diagonal brace at the corner, and prestress is applied to ensure the...

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Abstract

The invention discloses a bi-directional supporting system deformation monitoring and compensating device and a construction method, and belongs to the technical field of foundation pit supporting systems. The bi-directional supporting system deformation monitoring and compensating device and the construction method solve the problems that during a construction process of a traditional bi-directional steel support, one end is used as a fixing end, and the other end is installed, so that the accurate positioning of a cross joint of super long bi-directional steel support is hard to guarantee; and the construction safety of a deep and large foundation pit is hard to guarantee since a displacement error is easy to produce by applying a prestress. The system comprises a cross joint, and steelsupports and adjustable ends symmetrically and sequentially arranged on two sides of the cross joint, wherein the other ends of the adjustable ends are connected with an enclosing purlin of the foundation pit through embedded parts; and a synchronous control device capable of detecting and controlling displacement deviations of the steel supports and the cross joint is arranged on the cross joint.The construction method comprises the steps of firstly excavating an earthwork of the foundation pit from the middle part to two sides, and sequentially forming diagonal braces and inclined struts, wherein during diagonal brace construction, the cross joint is firstly positioned and installed, then the steel supports are arranged at two ends, the cross joint and the adjustable ends at two ends are remained, and finally prestresses are synchronously applied to the adjustable ends.

Description

technical field [0001] The invention belongs to the technical field of foundation pit support systems, and in particular relates to a two-way support system deformation monitoring compensation device and a construction method. Background technique [0002] Nowadays, the fixed end of the two-way steel support system is generally fixed at the purlin, and the prestress is added to one end of the active end to ensure the force of the system, and the steel support system has been completely erected before the prestress is applied. The steel support system is still applicable, but it is difficult to guarantee the torque of the entire steel support body by applying prestress to one end of the super-long two-way steel support, especially the displacement deviation and torque generated at the cross joint of the two-way support are large, which affects the steel support system. It is difficult to guarantee the safe construction of deep and large foundation pits. Therefore, it is neces...

Claims

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Application Information

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IPC IPC(8): E02D17/04G01B11/02
CPCG01B11/02E02D17/04E02D2600/10
Inventor 徐磊高文志朱毅敏耿涛杨凤鹤顾春鸣
Owner SHANGHAI CONSTR NO 1 GRP
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