Intelligent walking jacking system

Description

Application

Features

Technical data

■ Description

The walking jacking technology is developed from the traditional multi-point synchronous jacking technology, which changes the multi-point continuous jacking (or dragging) device into a walking jacking device placed on an independent pier.

GDBLDT150 Intelligent walking jacking system is composed of multiple walking jacking devices, and each device synchronously realizes jacking, forward movement with load, supporting beam drop and other cyclic actions to realize the forward movement of the jacking heavy objects. Compared with the traditional jacking construction using steel strand dragging, it has the characteristics of high safety, stable jacking and convenient axis adjustment. It does not require a lateral limit device. The equipment's own adjustment device can easily adjust the horizontal, longitudinal and vertical positions of the bridge. It is suitable for the jacking construction of large steel arch beams and steel box beams in the field of bridge construction. The walking jacking device consists of a sliding box, a slide, a PTFE slide plate, a jacking jack, a translation jack, a deviation correction device, a hydraulic pump station and a sub-control system. Each walking jacking device can also be connected to a set of master control systems.

ZNBD walking intelligent jacking system is the latest jacking system developed by our company. It adopts distributed control system to realize decentralized arrangement and centralized operation of actuators. It can not only meet the synchronous lifting of multiple hydraulic cylinders with uneven loads, but also monitor the pressure and displacement of each monitoring point in the process of bridge lifting in real time, and realize the force and position double closed-loop control of the bridge. It is mainly used for the special construction of bridge lifting such as large steel arch beams and steel box beams.

■ Application

1. Bridge jacking and bearing replacement

2. Bridge girder lifting and launching

3. Building lifting and relocation

4. Heavy machinery positioning

5. Steel structure installation

6. Shipyard block movement

7. Railway and metro construction

8. Large equipment horizontal moving

9. Structural correction and leveling

■ Features

1. A master control system controls multiple jacking equipment in three directions, and can automatically and manually complete vertical lifting, longitudinal horizontal jacking and lateral deviation correction synchronous work.

2. Using sensor technology, combined with PLC control technology, frequency conversion technology and computer software, precise control of displacement and synchronization is achieved.

3. Using force and displacement synchronous dual control, real-time deviation correction of the jacking process is achieved to ensure the slope of the steel beam and the line shape of the entire bridge.

4. The designed double-top structure for correction can ensure that when the correction cylinder moves, it will not generate lateral force on the cylinders in other directions. The spherical plate structure designed for the main top is conducive to centering and leveling during jacking.

5. Real-time display of monitoring parameters such as displacement and pressure of each jacking point, as well as the operating status of the oil pump and solenoid valve, and feedback control.

6. The sliding amplitude composed of special materials has a static friction coefficient of 0.06 and a dynamic friction coefficient of 0.03.

7. The modular design of the jacking and jacking structure reduces the workload of on-site pipeline connection and reduces the risk of system use.

8. The system structure is simple, the working space is small, and the cost is low.

9. Intelligent data management; over-limit alarm, safe and reliable.

■ Technical data

Technical parameters of walking jack:

Model	Thrust (KN)		Stroke(mm)	Working pressure(MPa)	Cylinder effective area (m2)	Dimensions(mm)
GDGDBLDT150	Lifting thrust	1500	200	48	3.14x10-2	1050x735x390
	Jumping thrust	300	400	47	0.64x10-2
	Correcting thrust	300	100	47	0.64x10-2
GDGDBLDT200	Lifting thrust	2000	200	48	4.15x10-2	1600x860x470
	Jumping thrust	600	400	53	1.13x10-2
	Correcting thrust	600	100	53	1.13x10-2
GDGDBLDT400	Lifting thrust	4000	200	50	8.04x10-2	1655x1185x560
	Jumping thrust	1300	400	52	2.54x10-2
	Correcting thrust	1300	100	52	2.54x10-2
GDGDBLDT650	Lifting thrust	6500	200	52	12.56x10-2	1800x1330x650
	Jumping thrust	1300	400	52	2.54x10-2
	Correcting thrust	1300	100	52	2.54x10-2
GDGDBLDT800	Lifting thrust	8000	150	53	16.08x10-2	1880x1380x700
	Jumping thrust	2000	400	49	4.15x10-2
	Correcting thrust	2000	100	49	4.15x10-2
GDGDBLDT1000	Lifting thrust	10000	200	52	19.24x10-2	2250x1500x1080
	Jumping thrust	2000	400	49	4.15x10-2
	Correcting thrust	2000	100	49	4.15x10-2

Synchronous jacking system for bridge bearing replacement

Technical parameters of intelligent walking jacking pump station:

Serial number	Parameters	GDBLBZ4X4-500A type	GDBLBZ4X8-315A type
1	Rated pressure	50MPa	31.5MPa
2	Rated flow	4X4L/min	4X8L/min
3	Total motor power	16kW	16kW
4	Hydraulic working medium	32# high-quality anti-wear hydraulic oil (winter) 46# high-quality anti-wear hydraulic oil (summer)	32# high-quality anti-wear hydraulic oil (winter) 46# high-quality anti-wear hydraulic oil (summer)
5	Pressure transmitter accuracy	Range: 0~70MPa Accuracy: 0.3%FS	Range: 0~70MPa Accuracy: 0.3%FS
6	Hydraulic oil filling amount	400 liters/unit	400 liters/unit
7	Jack displacement measurement	Range: 0~600mm Resolution: 0.1mm Accuracy: 0.5%FS	Range: 0~600mm Resolution: 0.1mm Accuracy: 0.5%FS
8	Weight	580kg	680kg
9	Dimensions	1200X1100x1070	1200X1100X1070
10	Control three-way jacking quantity	2	2

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