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Air pressure balance shield tunneling machine and construction method

A technology of air pressure balance and shield machine, which is applied in the direction of earth drilling, mining equipment, tunnels, etc., which can solve the problems of large construction power consumption, large surface subsidence, and secondary wear of tools, so as to achieve good promotion prospects and reduce subsidence , Reduce the effect of secondary wear

Pending Publication Date: 2020-11-06
POWERCHINA RAILWAY CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of using a hard rock tunnel boring machine is that the construction progress is fast. The hob is only worn out by breaking the rock without secondary wear. It only needs to be improved by adding water, and the dregs are relatively dry. The disadvantage is that the excavated rock must be hard rock and cannot be used in soft rock formations. The advantages of using earth pressure balance shield tunneling are that the working well covers a small area, the equipment cost and construction cost are low, and the construction progress is fast, etc.; Pressed slag soil leads to serious secondary wear of the tool, etc.
The advantage of using mud-water balance shield construction is that the pressure of the soil tank is controlled by air pressure, the pressure control is precise, the surface subsidence is small during construction, and there will be no gushing due to the connection between the soil tank and the mud pipe; the disadvantage is that the mud-water separation system on the working well occupies a large area , The cost of shield equipment is high, the construction power consumption is large, and the construction progress is affected by the capacity of the mud separation system, etc.

Method used

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  • Air pressure balance shield tunneling machine and construction method
  • Air pressure balance shield tunneling machine and construction method
  • Air pressure balance shield tunneling machine and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, a kind of air pressure balance shield machine, the front shield partition 4 of the air pressure balance shield includes two parts: the air pressure chamber 29 and the slag storage chamber 22, wherein the air pressure chamber 29 is between the front shield partition 4 and the soil chamber partition Between the upper space and the front space of the soil cabin partition, the slag storage compartment 22 is the lower space between the front shield partition 4 and the soil cabin partition;

[0038] A hob and a slag inlet are arranged on the cutterhead 1, and the slag inlet is connected to the slag chute 25 provided in the cutterhead 1, the cutterhead support arm 21 is fixed to the soil compartment spacer 35, and the cutterhead support arm 21 is connected to the main drive 20, The cutter head support arm 21 rotates under the drive of the main drive 20;

[0039]The slag scraper 24 is installed on the cutter head 1, and the slag scraper 24 is used to...

Embodiment 2

[0042] Such as image 3 As shown, the soil compartment partition includes an outer soil compartment partition 23 and a middle soil compartment partition 26, and the outer soil compartment partition 23 and the middle soil compartment partition 26 are respectively connected to the front shield 2 (or can be described as the front shield 2). fixed support) is fixed, and between the outer soil cabin partition 23 and the middle soil cabin partition 26 is the soil cabin partition ring 35.

[0043] For barometric chamber 29 and slag storage chamber 22, it can be described as: front shield partition 4 between front shield 2 and middle shield 6 divides front shield 2 internal space by outer soil compartment partition 23, middle part soil compartment partition 26 and soil The cabin partition ring 35 is divided into two parts, and the front and the middle part soil cabin dividing plate 26 tops are air pressure chambers 29, and the rear lower space of the middle part soil cabin dividing pl...

Embodiment 3

[0048] A water spray port is arranged on the cutter head 1, and the water spray port is connected to a water pump through a pipeline, and the water pump communicates with the water storage device. Spray water in front of the cutter head 1 for dust reduction and cooling. The water spraying step is set before the cutter head 1 starts to rotate, and the effect is better.

[0049] The slag tank 28 is an inclined structure, and the inclination angle of the inclined structure is 30°-45°. The tilt direction of the tilted structure can be found in figure 1 , the direction from the cutter head 1 to the main drive 20 is inclined from top to bottom.

[0050] The shield machine includes front shield 2, middle shield 6 and shield tail 11. The front shield partition 4 is arranged between the front shield 2 and the middle shield 6, and the front shield partition 4 is provided with a slag inlet 34, which is connected with the entrance of the screw conveyor 15.

[0051] A hinged seal 8 is ...

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PUM

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Abstract

The invention discloses an air pressure balance shield tunneling machine. The air pressure balance shield tunneling machine is provided with an air pressure cabin and a slag storage cabin, a cutter head is provided with a hob and a slag inlet, the slag inlet communicates with a slag containing chute formed in the cutter head, and a cutter head supporting arm is connected with a main drive and driven by the main drive to rotate; a slag scraping plate is installed on the cutter head and used for scraping slag into the slag containing chute in the cutter head; a slag stopping ring is installed ona front shield, a slag chute is formed in the slag stopping ring, an inlet of the slag chute is formed in the slag stopping ring, and the slag chute communicates to the slag storage cabin; the slag containing chute, the slag stopping ring and the slag chute form a slag outlet channel; and the slag in the slag containing chute is conveyed to the slag storage cabin through the slag chute. The invention further discloses a construction method of the air pressure balance shield tunneling machine. Air pressure and water-soil pressure of undisturbed soil of a shield excavation face are balanced, sedimentation of the earth surface and nearby buildings can be effectively reduced, secondary abrasion of the hob is greatly reduced, and the air pressure balance shield tunneling machine and the construction method have great popularization prospects.

Description

technical field [0001] The invention relates to the design of a shield machine, in particular to an air pressure balance shield machine and a shield construction method. Background technique [0002] Tunnels are generally constructed by the underground excavation method, and the quality of tunnel construction generally depends mainly on the quality of workmanship. The quality of tunnel construction can only be guaranteed after the quality is ensured. [0003] The shield method is a fully mechanized construction method in the underground excavation method. It is to push the shield machine in the ground, and support the surrounding rock through the shield casing and segments to prevent collapse into the tunnel. A mechanized construction method in which a cutting device is used to excavate the soil body in front of the excavation face, transported out of the hole by an excavation machine, pressurized and jacked at the rear by a propulsion cylinder, and assembled with prefabric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/087E21D9/06E21D9/12
CPCE21D9/087E21D9/0642E21D9/12E21D9/124
Inventor 王国义孟庆明张雯张晶房师涛刘秀争
Owner POWERCHINA RAILWAY CONSTR