A kind of underpinning system for force conversion of existing structure and its control method
A technology with existing structures and control methods, applied in building construction, construction, building maintenance, etc., can solve problems such as damage to existing structures, failure to guarantee prestressing at underpinning points, cracking, etc., and achieve the effect of avoiding progressive damage
Active Publication Date: 2022-07-15
CHINA RAILWAY DESIGN GRP CO LTD
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Problems solved by technology
When the steel wedge is inserted, half of the prestress is lost, and it is impossible to ensure that the force of each underpinning point meets the prestress required by the design
In addition, when the steel wedge is removed with a jack, the jack's jacking force is too large to cause deformation or even cracking of the upper structure, causing damage to the existing structure
Method used
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Embodiment 1
[0046] like Figure 1-Figure 5 As shown, a kind of underpinning system and control method thereof for the conversion of existing structural force, including steel support column 3, steel beam 4 and axial force servo system, the steel beam 4 is erected under the structural top plate 6, and the structural bottom plate 5 An axial force servo system is erected on the upper part, and the steel support column 3 is supported between the axial force servo system and the steel beam 4. The axial force servo system includes an underpinning support 1 and a control box 2, and the underpinning support 1 includes a jack 13 and several The mechanical lock 12 is provided with a distance measuring sensor and a pressure sensor on the underpinning support 1. The distance measuring sensor and the pressure sensor are respectively connected with the control box 2, and the control box 2 controls the jack through the signals fed back by the distance measuring sensor and the pressure sensor. 13 output,...
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The invention discloses an underpinning system for force conversion of an existing structure and a control method thereof, comprising a steel supporting column, a steel beam and an axial force servo system. Servo system, the steel support column is supported between the axial force servo system and the steel beam. The axial force servo system includes an underpinning support and a control box. The underpinning support is provided with ranging sensors and pressure sensors, ranging sensors and The pressure sensors are respectively connected with the control box. Through the synchronous loading of the axial force servo system and the through erection of the steel support columns, the existing structural system is vertically supported, so as to realize the transformation of the whole process and overall force of the system from the original support system to the temporary support system; the transformation is completed to form a new structure After the system is installed, by synchronizing and proportional unloading, the force conversion from the temporary support system to the new structural system and the rapid dismantling of the temporary support are realized, so as to avoid the impact load caused by unsynchronized unloading and the progressive damage of the support system.
Description
technical field [0001] The invention belongs to the field of wall column underpinning of existing structures, and in particular relates to an underpinning system for force conversion of existing structures and a control method thereof. Background technique [0002] The development and utilization of urban underground space is becoming more and more extensive. The construction and renovation of underground structures such as underground passages, underground shopping malls, subway stations, etc., as well as the connection of old and new underground structure spaces all involve the underpinning of wall columns (vertical load-bearing structures). . [0003] The underpinning of the vertical load-bearing structure is to realize the safe underpinning of the structure by changing the load transmission path. The most common types of underpinning include column underpinning, wall underpinning and overall structure underpinning. The load of the superstructure before underpinning is b...
Claims
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IPC IPC(8): E04G23/02E04G23/04
CPCE04G23/0222E04G23/04
Inventor 张晨明张西巡郭现钊杨励董秀竹吕宝伟时旦杨涛王宁李爱东任天宇姬利伟池浩
Owner CHINA RAILWAY DESIGN GRP CO LTD