A self-balancing root key jacking device based on vertical jack contraction
A vertical jack, self-balancing technology, applied in infrastructure engineering, construction, sheet pile walls, etc., can solve problems such as low efficiency and long labor hours, achieve low manufacturing costs, simple structure, and avoid pressure rod instability. Effect
Active Publication Date: 2019-07-05
TONGJI UNIV
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Problems solved by technology
In this method, the device needs to be lifted and then lowered every time it is jacked, and the alignment must be performed every time, which is inefficient and takes a long time
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[0024] A self-balancing root key jacking device based on vertical jack contraction, such as figure 1 , figure 2 As shown, including limit system and jacking system. The limit system includes four telescopic cross bars 6 and four rigid vertical bars 3 and a suspended top plate 1, the four telescopic horizontal bars 6 are horizontally fixed around the suspended top plate 1, and the four rigid vertical bars 3 The upper end is vertically connected below the suspended top plate 1, and the top of the suspended top plate 1 is connected with a drilling rig drill pipe 5. The jacking system includes eight jacking rods 8, two vertical jacks 2, a steel structure base 4 and two cross-shaped fixing plates 7, and the upper and lower sides of the steel structure base 4 are respectively connected with two vertically symmetrical jacks 2 The bottom is connected, the wing plates around the steel structure base 4 are connected to the lower ends of the four vertical rigid rods 3, the fixed plate...
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The invention relates to a self-balancing root key jacking device based on vertical jack contraction. The device comprises a limit system and a jacking system, the limit system comprises four telescopic cross bars, four rigid vertical bars and a suspended top plate, the four telescopic cross bars are horizontally fixed on the suspended top plate, the upper ends of the four rigid vertical rods areconnected to the suspended top plate, and a drilling machine drilling rod is connected above the suspended top plate; the jacking system includes eight jacking pressing rods, two vertical jacks, a steel structure base and two fixed plates, the steel structure base is connected with the bottoms of the two vertically symmetric jacks, the steel structure base is also connected with the lower ends ofthe four rigid vertical rods, two ends of the fixed plates are fixed to the movable ends of the jacks, each two jacking pressing rods are hinged to form pressing rod frames, two ends of the pressing rod frames are respectively hinged on the two fixed plates, and the four pressing rod frames form a pressing rod mechanism which can be deformed according to the strokes of the jacks. The device can effectively eliminate the vertical counter force applied by the outside, and avoid unstable pressing rods of suspending rods.
Description
technical field [0001] The invention relates to a jacking device for root pile construction, in particular to a self-balancing root key jacking device based on vertical jack contraction. Background technique [0002] At present, during the jacking construction of small and medium-sized piles with cast-in-place root keys, the jacking device carries the root key required for a single layer and lowers it. After one jacking is completed, the jacking device needs to be lifted to the ground, the root key is reinstalled, and lowered again . In this method, the device needs to be lifted and then lowered every time it is jacked, and the alignment must be performed again every time, which is inefficient and takes a long time. In order to improve efficiency, a new construction method is going to be adopted. The root key is placed on the reinforcement cage in advance, and then lowered together with the reinforcement cage, so that the jacking process can be carried out continuously. Wh...
Claims
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IPC IPC(8): E02D7/20
CPCE02D7/20
Inventor 全程浩高林蔚任少岚雷思勉宁世祺操金鑫
Owner TONGJI UNIV