Retention type prestress applying device
A technology of applying device and prestressing, applied in construction, excavation, infrastructure engineering, etc., can solve the problems of hidden safety hazards, low accuracy, low assembly, etc. strong effect
Pending Publication Date: 2022-05-27
上海巨鲲科技有限公司
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Problems solved by technology
[0003] In the prior art, the prestressing and re-addition of steel supports in foundation pits requires manual handling of jacks and manual pressurization; manual operation is not only inefficient and inaccurate, but also has certain advantages for the operation in the narrow space around the deep foundation pit. Potential safety hazards; after applying the prestress, it is necessary to maintain the pressure through the conversion structure, and the loss of prestress is not easy to control; the prestress application device cannot be adjusted according to the number of supporting steel sections, has no expandability, and the assembly is not high, which will cause the joint to be too heavy. difficulty
Method used
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Embodiment Construction
[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0033] see Figure 1-Figure 11 , a reserved prestressing device, comprising a jack joint 4, a leveling bolt 9, a leveling plate 10, a movable head 8, and a backing plate 11; the jack joint 4 is provided with a number of nodes that are fixedly connected side by side and each has a jack slot. There is a gap between the adjacent jack slots, and the movable head 8 has a guide plate 801 and an end plate 802 that are perpendicular to each other. The guide plate 801 is set in the gap and can be guided by the gap. Move back and forth; the adjacent end plates 802 are staggered and overlapped, and a backing plate 11 with the same thickness as the end plate 802 is fixed on the outermost end plate 802 .
[0034] In this example, see figure 2 , the jack joint 4 includes a left node 401, at least one standard node 402, and a right node 403 that are spliced ...
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The invention relates to a retaining type prestress applying device which comprises a jack connector, a leveling bolt, a leveling plate, a movable head and a base plate. The jack joint is provided with a plurality of node parts which are fixedly connected side by side and are respectively provided with a jack groove, a gap is formed between every two adjacent jack grooves, the movable head is provided with a guide plate and an end plate which are perpendicular to each other, and the guide plate is arranged in the gap and can move back and forth under the guidance of the gap; the leveling plate is fixed to the upper portion of the movable head in a covering mode through leveling bolts and extends towards the positions of the jack grooves in the two sides. And the base plate and the movable head are alternately and fixedly connected to form a whole. A reserved prestress applying mode is adopted, the jack and the supporting rod are designed into a whole, prestress is conveniently applied and unloaded, and frequent manual carrying during pressurization / decompression is avoided.
Description
technical field [0001] The invention relates to a reserved prestressing device, belonging to the technical field of building construction. Background technique [0002] In order to ensure the safety of the construction of the underground structure and the surrounding environment of the foundation pit, it is necessary to adopt the support, reinforcement and protection measures for the side wall of the foundation pit and the surrounding environment. Whether it is a high-rise building or a deep foundation pit project for subway construction, since most of the excavation is carried out in the city, there are usually various structures such as traffic arteries, existing buildings or pipelines around the foundation pit. Safety, saving construction period and cost, the inner support system of steel structure is widely used. [0003] In the prior art, the application and addition of prestressing steel support in the foundation pit requires manual handling of jacks and manual pressu...
Claims
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IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 王震唐涛
Owner 上海巨鲲科技有限公司