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Open caisson structure applied to narrow zone and construction method of open caisson structure

A technology for narrow areas and construction methods, which is applied in infrastructure engineering, underwater structures, artificial islands, etc., can solve the problems of surrounding soil disturbance, inconsistent settlement speed, inconvenient scaffolding, etc., and achieves convenient pouring process and construction. , the effect of good structural stability

Active Publication Date: 2021-12-17
武汉市武昌市政建设(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the related technologies mentioned above, the inventor found the following defects in the actual construction: when the construction position of the caisson is in a narrow area, the scaffolding for pouring the prefabricated shaft It is inconvenient, and the hoisting equipment used to lift the prefabricated shaft is not easy to enter the construction position, and the disturbance of the surrounding soil is seriously affected during the settlement process of the prefabricated shaft, and it is easy to be deflected due to the inconsistent settlement speed of each part, and the follow-up needs more Adjustment steps for

Method used

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  • Open caisson structure applied to narrow zone and construction method of open caisson structure
  • Open caisson structure applied to narrow zone and construction method of open caisson structure
  • Open caisson structure applied to narrow zone and construction method of open caisson structure

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Experimental program
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Effect test

Embodiment 1

[0046] refer to figure 1 , the caisson structure applied in the narrow area includes the caisson foundation pit formed by excavating downward layer by layer, each layer of the caisson foundation pit is a caisson foundation pit unit 1, and evenly An anchor piece 2 is provided, and an annularly distributed reinforcement cage 3 is arranged on the inner peripheral side of the caisson foundation pit unit 1, and the reinforcement cage 3 and the anchor piece 2 are fixedly connected to each other. There is an annular concrete shaft wall 4 poured outside the anchor piece 2 and the reinforcement cage 3, and the adjacent two layers of annular concrete shaft walls 4 are stacked up and down, and a concrete bottom cover 11 is provided at the bottom of the caisson foundation pit unit 1 at the bottom.

[0047] Compared with the existing caisson construction method, this application can carry out the construction layer by layer, and the height of each layer can be controlled at 100-160cm, so t...

Embodiment 2

[0063] refer to figure 2 , image 3 The difference between embodiment 2 and embodiment 1 is that the caisson structure applied in narrow areas also includes auxiliary pouring units 5, and multiple auxiliary pouring units 5 are combined to form a pouring formwork, which makes the pouring process more convenient.

[0064] The auxiliary pouring unit 5 comprises a bottom support 51 horizontally supported on the ground, an arc formwork 52 vertically hinged on the upper surface of one side of the bottom support 51, and an arc formwork 52 arranged between the bottom support 51 and the arc formwork 52 for An angle adjustment assembly 53 for adjusting the angle of inclination of the arc formwork 52.

[0065] The bottom support member 51 is a flat plate structure up and down, and its side corresponding to the arc formwork 52 is arc-shaped, matching the curvature of the arc formwork 52 . The arc formwork 52 is hinged to the bottom support 51 through hinges, its arched surface is used ...

Embodiment 3

[0073] refer to Figure 4 The difference between Embodiment 3 and Embodiment 2 is that the caisson structure applied in narrow areas also includes elastic fixing components 54 for fixing two adjacent arc-shaped templates 52 .

[0074] The elastic fixing assembly 54 includes a fixed seat 541 and an elastic clamping seat 543 which are respectively fixedly connected to both sides of the concave surface of the arc template 52, and an elastic clamping seat 543 which is rotatably connected to the fixed seat 541 and can be connected to the adjacent arc template 52. 543 is the wrench 542 that is snapped in elastically.

[0075] The fixing seat 541 is rod-shaped, and one end is vertically fixedly connected to the arc template 52 . The handle 542 is provided with a through hole at the position corresponding to the fixed seat 541, and is connected to the fixed seat 541 by rotation through the through hole. The wrench 542 can only rotate around the axis of the fixed seat 541 relative to ...

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Abstract

The invention relates to the technical field of open caisson construction, in particular to an open caisson structure applied to a narrow zone and a construction method of the open caisson structure. The open caisson structure comprises open caisson foundation pits formed by excavating downwards layer by layer, wherein each layer of open caisson foundation pit is an open caisson foundation pit unit, anchoring parts are evenly arranged on the pit wall of each open caisson foundation pit unit, steel reinforcement cages distributed annularly are arranged on the inner circumferential side of each open caisson foundation pit unit, the steel reinforcement cages are fixedly connected with the anchoring parts, annular concrete well walls poured outside the anchoring parts and the reinforcement cages are further arranged on the inner circumferential sides of the open caisson foundation pit units, the annular concrete well walls on the upper layer and the lower layer which are adjacent to each other are stacked up and down, and a concrete sealing bottom is arranged at the bottom of the lowermost open caisson foundation pit unit. The open caisson construction method comprises the steps of positioning, open caisson foundation pit unit excavation, anchoring part installation, reinforcement cage binding, pouring and bottom sealing. Reverse construction is carried out in a layer-by-layer downward mode, construction is more convenient, the structural stability is good, and deflection is not prone to occurring.

Description

technical field [0001] The present application relates to the technical field of caisson construction, in particular to a caisson structure applied in a narrow area and a construction method thereof. Background technique [0002] Caissons are generally used as the foundation of bridge piers or other structures. [0003] At present, the main construction method of caissons is to prefabricate the shaft on the ground first, then excavate the foundation pit on the ground, and then hoist the shaft into the foundation pit. The design elevation, and finally through the concrete bottom and filling the gap between the wellbore and the foundation pit, the construction of the caisson is completed. [0004] In view of the related technologies mentioned above, the inventor found the following defects in the actual construction: when the construction location of the caisson is in a narrow area, it is inconvenient to build the scaffolding for pouring the prefabricated shaft, and the hoist...

Claims

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Application Information

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IPC IPC(8): E02D29/045E02D15/02
CPCE02D29/045E02D15/02E02D2250/0023
Inventor 范南征胡峰丁文峰郑为祥张波
Owner 武汉市武昌市政建设(集团)有限公司
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