CN110130912A - A kind of earth pressure balance shield machine cutter head used in soft soil layer step method construction - Google Patents

Abstract

The present invention relates to the technical field of shield machines, in particular to an earth pressure balance shield machine cutter head used for construction in soft soil layers by step method, which includes a plurality of transmission devices installed on the partition of the soil bin to drive the shield machine respectively There are multiple cutterheads at the front end, and the transmission device includes a reducer installed with the motor. The reducer is installed on the input end of the gearbox through a shaft, and the output end of the gearbox is installed with a drive shaft for installing cutterheads, which is located in the upper semicircle of the shield machine. The length of the drive shaft is longer than that of the lower semicircle drive shaft of the shield machine, so that the distance between the cutter head installed on the upper semicircle drive shaft of the shield machine and the partition of the soil bin is greater than that of the cutterhead installed on the lower semicircle drive shaft of the shield machine. The distance between the cutter head and the partition of the soil bin makes the upper half-circle cutter head and the lower half-circle cutter head staggered to realize excavation by step method, and the disturbance of surrounding soil is small through multi-cutter excavation, and through the steps The method of excavation improves the stability of the tunnel face and avoids the problem that the ground is prone to subsidence as much as possible.

Description

A kind of earth pressure balance shield machine cutter head used in soft soil layer step method construction

technical field

The invention relates to the technical field of shield machines, in particular to an earth pressure balance shield machine cutterhead used for construction in soft soil layers by step method.

Background technique

The shield machine is a kind of professional equipment for tunneling, which is widely used in the construction of subway tunnels. According to the different strata, it is necessary to customize the corresponding shield machine. For soft soil formations, a single circular cutterhead shield machine is routinely used at present. However, its cutter head and drive structure are complicated, and the equipped torque is relatively large. For soft ground, there is a problem of configuration waste. The torque of a single circular cutter head cannot be offset, and the disturbance to the surrounding soil is large, which is prone to land subsidence .

Contents of the invention

Aiming at the problems existing in the prior art, the present invention provides an earth pressure balance shield machine cutter head used for the step method construction in soft soil layers, which avoids as far as possible the inability to offset the torque of the cutter head in the prior art, and damages the surrounding soil. The disturbance of the body is relatively large, and the problem of ground subsidence is likely to exist, and the cutter head of the earth pressure balance shield machine used for the construction of the soft soil layer by the step method of the present invention forms step excavation, which improves the stability of the tunnel face.

Technical scheme of the present invention is as follows:

A cutter head of an earth pressure balance shield machine used for construction by step method in soft soil layer, including a plurality of transmission devices installed on the partition of the soil bin, and correspondingly, a plurality of cutter heads are installed on the front end of the shield machine, that is, a The transmission device drives a cutter head, the transmission device includes a reducer installed with the motor, the reducer is installed on the input end of the gearbox through a shaft, and the output end of the gearbox is installed with a drive shaft for installing the cutter head, located in the The length of the transmission shaft of the semicircle on the top of the machine is longer than the length of the transmission shaft located in the lower semicircle of the shield machine, so that the distance between the cutterhead installed on the semicircle transmission shaft of the shield machine and the partition of the soil bin is greater than that installed in the lower semicircle of the shield machine. The distance between the cutter head on the transmission shaft and the partition of the soil bin, so that the cutter head of the upper semicircle and the cutter head of the lower semicircle are arranged alternately, so as to realize excavation by step method, and the shield body of the upper semicircle of the shield machine is facing The direction of the surface to be excavated protrudes to form a brim structure, and a spatula is arranged along the circumferential direction on the contact surfaces of the upper semicircular shield body and the lower semicircular shield body and the surface to be excavated.

Specifically, the gear box is installed on the soil bin partition, and a through hole is provided on the soil bin partition to guide the installation seat, and the gear box is installed on the installation seat provided by the through hole as a whole, so that the transmission device is fixed as a whole. On the partition of the soil silo.

Preferably, there are eight transmission devices, and there are eight corresponding cutter heads, and each transmission device drives an independent cutter head.

Preferably, the cutterhead is divided into a large cutterhead and a small cutterhead, and there are four large cutterheads and four small cutterheads respectively, a small cutterhead and two cutterheads are arranged in the upper semicircle of the shield machine, and two large cutterheads are arranged in the lower semicircle of the shield machine There are three small cutter heads between the two large cutter heads set in the upper semicircle of the shield machine and the lower semicircle of the shield machine.

The gear box of the transmission device used to drive the rotation of the large cutter head is provided with three input ends and one output end, the three input ends are respectively connected to the reducer through the shaft, and the output end is connected to the transmission shaft, and three are installed in the gear box The input shaft and one output shaft are equipped with pinion gears on the input shaft, and large gears are installed on the output shaft. The three small gears mesh with the large gear respectively, so that the reducer can be driven by three motors to move synchronously, so that the three The reducer synchronously drives the gear on the input shaft of the gearbox to rotate, so that the large gear on the output shaft rotates, so that the transmission shaft connected to the output end of the gearbox rotates, driving the large cutter head to rotate.

The gear box of the transmission device used to drive the small cutterhead to rotate is provided with an output end and an input end, the output end is connected to the reducer through a shaft, and the transmission shaft is connected to the output end, and an output shaft and an input end are installed in the gear box. The input shaft, the input shaft and the output shaft are equipped with gears and mesh with each other, so that a motor drives the reducer to move, and the reducer drives the gear installed on the input shaft in the gearbox through the shaft, so that the output shaft drives the drive shaft to rotate , to drive the small cutter head to rotate.

Beneficial effects of the present invention: the present invention arranges a plurality of cutterheads at the excavation end of the shield body, and adopts a staggered arrangement between the cutterheads located in the upper semicircle of the shield body and the cutterheads in the lower semicircle of the shield body, through the cooperation of the large cutterhead and the small cutterhead The excavation has little disturbance to the surrounding soil, and the invention adopts the staggered arrangement to realize the excavation by the step method, improves the stability of the tunnel face, and avoids the problem that the ground is prone to subsidence as much as possible.

Description of drawings

Fig. 1 is the schematic diagram of the cutter head installation position of the present invention;

Fig. 2 is a structural schematic diagram of a multi-cutter disc of the present invention;

Fig. 3 is a schematic diagram of the installation position of the transmission device of the present invention;

Fig. 4 is a schematic diagram of the large cutter head transmission device of the present invention;

Fig. 5 is a schematic diagram of the small cutter head transmission device of the present invention;

Explanation of reference signs: 1. shield body; 2. motor; 3. reducer; 4. earth bin partition; 5. large cutter head; 6. small cutter head; .

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Referring to accompanying drawing 1 to accompanying drawing 5, the optimum embodiment of the present invention is described in detail, a kind of earth pressure balance shield machine cutter head that is used for the step method construction of soft soil layer, comprises the A plurality of transmission devices respectively drive multiple cutterheads at the front end of the shield machine. The transmission device includes a reducer 3 installed with the motor 2. The reducer 3 is installed on the input end of the gear box 9 through a shaft. The gear box 9 The output end is equipped with a transmission shaft 8 for installing the cutterhead, and the length of the semicircular transmission shaft 8 located on the upper shield machine is greater than the length of the semicircular transmission shaft 8 located on the lower shield machine, so that the cutterhead installed on the semicircular transmission shaft 8 on the shield machine The distance between the partition plate 4 and the soil bin is greater than the distance between the cutter head installed on the lower semicircle transmission shaft 8 of the shield machine and the partition plate 4 of the soil bin, so that the cutter head of the upper semicircle and the cutter head of the lower semicircle are staggered arrangement, so as to realize excavation by step method, and the upper semicircular shield body 1 of the shield machine protrudes toward the direction of the surface to be excavated to form a brim structure, and the upper semicircular shield body 1 and the lower semicircular shield body 1 are connected with the to-be-opened A spatula 7 is arranged along the circumferential direction on the contact surface of the digging surface. The gear box 9 is installed on the soil bin partition 4, and a through hole is provided on the soil bin partition 4, and the gear box 9 is integrally installed on the mounting seat provided by the through hole, so that the transmission device as a whole is Be fixed on the earth bin dividing plate 4.

There are eight transmission devices, and there are eight corresponding cutter heads, and each transmission device drives an independent cutter head. The cutterheads are divided into a large cutterhead 5 and a small cutterhead 6. There are four large cutterheads 5 and four small cutterheads 6 respectively. A small cutterhead 6 and two cutterheads are arranged in the upper semicircle of the shield machine, and two cutterheads are arranged in the lower half circle of the shield machine. There are three large cutterheads 5, and three small cutterheads 6 are arranged between the two large cutterheads 5 arranged in the upper semicircle of the shield machine and the lower semicircle of the shield machine.

The gear box 9 of the transmission device used to drive the large cutter head 5 to rotate is provided with three input ends and an output end, and the three input ends are respectively connected with a reducer 3 through shafts, and the output end is connected with a transmission shaft 8, and the gear box Three input shafts and one output shaft are installed in 9, and pinion gears are installed on the input shafts, and large gears are installed on the output shafts, and the three small gears mesh with the large gears respectively, so that the reducer can be driven by three motors 2 3 synchronous movement, so that the three reducers 3 synchronously drive the gear on the input shaft of the gearbox 9 to rotate, so that the large gear on the output shaft rotates, so that the transmission shaft 8 connected to the output end of the gearbox 9 rotates, driving Big cutterhead 5 rotates.

The gear box 9 of the transmission device that is used to drive the small cutter head 6 to rotate is provided with an output end and an input end, the output end is connected to the speed reducer 3 through the shaft, and the transmission shaft 8 is connected on the output end, and the gear box 9 is equipped with An output shaft and an input shaft, gears are installed on the input shaft and the output shaft and meshed with each other, so that a motor 2 drives the reducer 3 to move, and the reducer 3 drives the gear installed on the input shaft in the gearbox 9 to move through the shaft , so that the output shaft drives the transmission shaft 8 to rotate and drives the small cutter head 6 to rotate.

The present invention resets the cutter head without changing other equipment of the original shield machine, adopts a plurality of transmission devices to respectively drive a plurality of cutter heads, guides a through hole on the partition plate 4 of the soil bin to set up a mounting seat, and a gear box 9 The whole is installed on the mounting seat provided by the through hole, so that the transmission device is fixed on the earth bin partition 4 as a whole. In addition, the upper half-circle cutter head of the shield machine and the lower half-circle cutter head of the shield machine are arranged in a staggered manner, so that excavation by the step method can be realized, and the excavation by the large cutter head 5 and the small cutter head 6 will cause little disturbance to the surrounding soil, and in the The soft soil layer is excavated by the step method, which improves the stability of the tunnel face and avoids the problem of easy ground settlement as much as possible.

Claims (6)

1. a kind of earth pressure balance shield machine cutterhead for the construction of Soft Soil Layer benching tunnelling method, which is characterized in that including being mounted on Tu Cang Multiple transmission devices on partition (4), corresponding, shield machine front end is equipped with multiple cutterheads, and a transmission device drives one Cutterhead rotation, the transmission device includes the speed reducer (3) mutually installed with motor (2), and speed reducer (3) is mounted on gear by axis The input terminal of case (9), the output end of gear-box (9) are equipped with the transmission shaft (8) for installing cutterhead, are located at shield machine upper semi-circle The length of transmission shaft (8) is greater than the length positioned at shield machine lower half circle transmission shaft (8), so that being mounted on the transmission of shield machine upper semi-circle The distance between cutterhead on axis (8) and native storehouse partition (4) be greater than the cutterhead that is mounted on shield machine lower half circle transmission shaft (8) with The distance between native storehouse partition (4)；And the shield body (1) of the shield machine upper semi-circle is protruded to form cap to the direction to excavation face Eaves structure, and the shield body (1) of the shield body of upper semi-circle (1) and lower half circle with it is peripherally disposed on the contact surface to excavation face Perching knife (7).

2. a kind of earth pressure balance shield machine cutterhead for the construction of Soft Soil Layer benching tunnelling method as described in claim 1, feature exist In the gear-box (9) is mounted on native storehouse partition (4), and through-hole setting mounting base, gear-box have been led on native storehouse partition (4) (9) integral installation is in the mounting base that the through-hole is arranged, so that transmission device is integrally fixed on native storehouse partition (4).

3. a kind of earth pressure balance shield machine cutterhead for the construction of Soft Soil Layer benching tunnelling method as claimed in claim 2, feature exist In the transmission device shares eight, and the corresponding cutterhead shares eight, and each transmission device drives an independent knife Disk.

4. a kind of earth pressure balance shield machine cutterhead for the construction of Soft Soil Layer benching tunnelling method as claimed in claim 3, feature exist Be divided into semi shield oil cylinder (5) and small cutterhead (6) in, the cutterhead, semi shield oil cylinder (5) and small cutterhead (6) respectively there are four, shield machine upper half Circle is provided with one small cutterhead (6) and two cutterheads, and there are two semi shield oil cylinder (5), shield machine upper semi-circles for the setting of shield machine lower half circle There are three small cutterhead (6) for setting between two semi shield oil cylinders (5) of shield machine lower half circle setting.

5. a kind of earth pressure balance shield machine cutterhead for the construction of Soft Soil Layer benching tunnelling method as claimed in claim 4, feature exist In there are three input terminals and an output for gear-box (9) setting of the transmission device for driving semi shield oil cylinder (5) to rotate End, three input terminals pass through axis connection respectively to be had speed reducer (3), connects transmission shaft (8) on output end, peace in gear-box (9) Dress is mounted on pinion gear on input shaft there are three input shaft and an output shaft, is equipped with gear wheel on output shaft, and three Pinion gear is engaged with gear wheel respectively.

6. a kind of earth pressure balance shield machine cutterhead for the construction of Soft Soil Layer benching tunnelling method as claimed in claim 4, feature exist In the gear-box (9) of the transmission device for driving small cutterhead (6) to rotate is provided with an output end and an input End, output end connect transmission shaft (8) on output end by axis connection speed reducer (3), be equipped in gear-box (9) one it is defeated Shaft and an input shaft are mounted on gear and intermeshing on input shaft and output shaft.