Vertical jacking machine

Abstract

The utility model relates to a vertical jacking machine which is applied to vertical jacking in a rock tunnel, a cutter head is arranged at the top of jacking equipment, the cutter head is provided with a main shaft and a transverse shaft, an alloy rolling cutter head is arranged on the transverse shaft, the alloy rolling cutter head is used for crushing and cutting a tunnel top rock layer, and the alloy rolling cutter head is used for crushing and cutting rocks. The problem of adaptability of vertical jacking in a soil layer can be solved, the vertical jacking device can be suitable for soft soil and hard rock stratums, the problem that only blind jacking can be achieved in previous vertical jacking is solved, and the vertical jacking device has the active rock breaking capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a vertical jacking machine used in rock tunnels. Background Art

[0002] The water intake and drainage systems of thermal power plants mainly use open channels or caissons. Due to environmental protection and seawall restrictions, the water intake and drainage systems of coastal power plants do not have the conditions for open excavation. They need to adopt deep-sea water intake and drainage, set up deep buried tunnels, use shield construction, and install water intake and drainage risers at the ends of the tunnels. The construction method of water intake and drainage risers is mainly vertical jacking. Vertical jacking is to install jacking equipment at the predetermined position in the tunnel. The jacking water intake and drainage pipes are prefabricated and segmented. After the prefabricated jacking pipe section is reliably connected to the reserved opening of the tunnel, the jacking equipment is used to jack the vertical pipe section upward. Generally, a blind jacking method is used to pass through the soil layer at the top of the tunnel to reach the designed elevation. After the water is balanced inside and outside the tunnel, the water intake and drainage grille is installed underwater above the riser to achieve tunnel penetration.

[0003] Patent document CN202210333173.X discloses a method for vertical jacking of pipelines. Using a special semi-open slab, the internal pressure of the soil layer inside the slab is controlled by controlling the mud removal rate, water injection rate, and jacking speed, thereby maintaining the stability of the soil layer outside the slab and reducing the jacking thrust. However, this method is only suitable for weak soil layers, such as silt and clay, and the thickness cannot be too large. Too large a thickness will result in excessive jacking resistance, requiring a large jacking force, making it difficult to control the verticality of the vertical jacking, and even impossible to jack into rock formations. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a vertical jacking machine used for tunnels in rocks. Improvements are made to the vertical jacking equipment. A cutter head is set at the top of the jacking and equipped with an alloy rolling cutter head. The alloy rolling cutter head is used to crush and cut the rock, so that the vertical jacking device can also be used in harder rock formations to solve the above-mentioned problems.

[0005] The utility model provides the following technical solutions:

[0006] A vertical jacking machine is used for vertical jacking in rock tunnels, comprising a base with a vertical pole provided vertically at the center of the base, a jack and a drive motor for jacking arranged on the base, a jacking pipe section installed above the jack, a jacking cutter head installed on the top of the prefabricated jacking pipe section, and the jacking cutter head and the jacking pipe section are fastened together by bolts; a main shaft is provided in the vertical direction of the center of the jacking cutter head, the main shaft is connected to the vertical pole, and the drive motor can drive the vertical pole and the main shaft to rotate; the jacking cutter head is also provided with a plurality of horizontal shafts, the axes of the horizontal shafts intersecting the axis of the main shaft at right angles; a plurality of alloy rolling cutter heads are provided on the horizontal shaft, and the alloy rolling cutter heads crush and cut the rock layer on the top of the tunnel; a ring beam and a lateral sealing plate are also provided around the jacking cutter head, and the main sealing plate is welded between the ring beam and the main shaft.

[0007] Furthermore, the jacking cutter disc also includes: a main sealing plate, a lateral sealing plate and a ring beam, the ring beam is arranged at the periphery of the jacking cutter disc, the main sealing plate is welded between the ring beam and the main shaft, and the lateral sealing plate is arranged below the ring beam.

[0008] Furthermore, the vertical pole and the main shaft are made of long round steel pipes, and the horizontal shaft is composed of steel sections; the alloy rolled cutter head is cast in one step by the steel structure; the main sealing plate and the lateral sealing plate are made of steel plates.

[0009] Furthermore, the vertical jacking machine also includes a water inlet pipe and a mud discharge pipe. The water inlet pipe and the mud discharge pipe are both made of round steel pipes and hoses and are equipped with water stop valves; a water stop gasket is provided at the connection between the jacking pipe section and the jacking cutter disc; the base is arranged at the reserved notch position at the bottom of the tunnel, and the base is welded with a steel structure, and the base is welded to the tunnel lining.

[0010] Furthermore, a water-stopping mechanism is arranged around the reserved gap at the bottom of the tunnel, and the water-stopping mechanism includes a water-stopping frame and a water-stopping ring; the water-stopping ring adopts an annular elastic water-stopping material, such as rubber.

[0011] Furthermore, the vertical pole is a height-adjustable mechanism.

[0012] The utility model has the following beneficial technical effects:

[0013] 1. The utility model mainly makes improvements on the vertical jacking equipment. A cutter head is set at the top of the jacking, and an alloy rolling cutter head is equipped. The alloy rolling cutter head is used to crush and cut the rock, which can solve the problem of vertical jacking's adaptability in soil layers. It can be applied from soft soil to harder rock layers. This solves the problem that vertical jacking can only be done blindly, and makes the vertical jacking device have the ability to actively break rocks.

[0014] 2. The device of the utility model is mainly completed in the tunnel, which reduces the cross-operation inside and outside the tunnel, can reduce the time of offshore operations, reduce the impact of offshore wind and waves and climate, can increase the reliability of construction, and can speed up the construction speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front structural schematic diagram of a vertical jacking machine of the present utility model.

[0016] Figure 2 It is a side structural schematic diagram of a vertical jacking machine of the utility model.

[0017] Figure 3 This utility model Figure 1 Schematic cross-section of AA.

[0018] Figure 4 This utility model Figure 1 Schematic cross-section of the BB.

[0019] The reference numerals in the figures are:

[0020] 1 Lifting cutter head

[0021] 1-1 spindle

[0022] 1-2 alloy rolling cutter head

[0023] 1-3 horizontal axis

[0024] 1-4 main cover plate

[0025] 1-5 ring beam

[0026] 1-6 bolts

[0027] 1-7 side cover

[0028] 2 water inlet pipe

[0029] 3 Mud discharge pipe

[0030] 4 poles

[0031] 5-way water pipe

[0032] 6 lifting pipe section

[0033] 7 Water-stop mechanism

[0034] 7-1 Waterstop frame

[0035] 7-2 water stop ring

[0036] 8 jacks

[0037] 9 drive motor

[0038] 10 bases

[0039] 11 Tunnel DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Example

[0042] A vertical jacking machine is used for vertical jacking in rock tunnels, comprising a base 10, with a vertical pole 4 vertically provided at the center of the base, a jack 8 and a drive motor 9 for jacking arranged on the base 10, and a jacking pipe segment 6 installed above the jack 8, characterized in that a jacking cutter head 1 is installed on the top of the prefabricated jacking pipe segment 6, and the jacking cutter head 1 and the jacking pipe segment 6 are fastened together by bolts 1-6; a main shaft 1-1 is provided in the vertical direction of the center of the jacking cutter head 1, the main shaft 1-1 is connected to the vertical pole 4, and the drive motor 9 can drive the vertical pole 4 and the main shaft 1-1 to rotate; a plurality of horizontal shafts 1-3 are also provided on the jacking cutter head 1, and the axis of the horizontal shaft 1-3 intersects the axis of the main shaft 1-1 at right angles; a plurality of alloy rolling cutter heads 1-2 are provided on the horizontal shaft 1-3, and the alloy rolling cutter heads 1-2 crush and cut the rock layer on the top of the tunnel; preferably, the vertical pole is a height-adjustable mechanism.

[0043] In this embodiment, the jacking cutter disc 1 also includes: a main sealing plate 1-4, a lateral sealing plate 1-7 and a ring beam 1-5. The ring beam 1-5 is arranged on the periphery of the jacking cutter disc 1, and the main sealing plate 1-4 is welded between the ring beam 1-5 and the main shaft 1-1. The lateral sealing plate 1-7 is arranged below the ring beam 1-5. By arranging the main sealing plate 1-4, the open space of the jacking cutter disc 1 is partially closed, so that the jacking cutter disc 1 forms a whole. The opening ratio of the jacking cutter disc 1 is controlled by adjusting the size of the main sealing plate to facilitate slag discharge, and the lateral sealing plate 1-7 serves to close the jacking cutter disc 1 to form a closed cavity, while isolating it from external soil and water.

[0044] In this embodiment, the vertical jacking machine also includes a water inlet pipe 2 and a mud discharge pipe 3. The water inlet pipe 2 and the mud discharge pipe 3 are made of round steel pipe and hose and are equipped with a water stop valve. A water stop gasket is provided at the connection between the jacking pipe section 6 and the jacking cutter head 1.

[0045] Preferably, the vertical pole 4 and the main shaft 1-1 are made of long round steel pipes, the horizontal shaft 1-3 is composed of steel sections, the alloy rolled cutter head 1-2 is cast in one step by the steel structure, and the main sealing plate 1-4 and the lateral sealing plate 1-7 are made of steel plates.

[0046] In this embodiment, the base 10 is arranged at the reserved gap at the bottom of the tunnel. The base 10 is welded from a steel structure. The base 10 is welded to the tunnel lining. A water-stop mechanism 7 is arranged around the reserved gap at the bottom of the tunnel. The water-stop mechanism 7 includes a water-stop frame 7-1 and a water-stop ring 7-2. The water-stop ring 7-2 is made of rubber.

[0047] The specific implementation method of the device of the present invention is as follows: when the tunnel 11 is excavated into place and the lining is completed, a jacking base 10 is arranged at the bottom of the tunnel at the reserved gap position. The base 10 is made of welded steel structure, and the base 10 is welded to the tunnel lining. A jacking jack 8 and a drive motor 9 are arranged on the base 10.

[0048] A water-stop mechanism 7 is arranged around the reserved gap, and the water-stop mechanism 7 includes a water-stop frame 7-1 and a water-stop ring 7-2. The jacking pipe section 6 is installed above the jack 8, and the vertical jacking cutter head 1 is installed on the top of the prefabricated jacking pipe section 6. A water-stop gasket is provided between the top of the jacking pipe section 6 and the bottom of the jacking cutter head 1. The jacking cutter head 1 and the prefabricated jacking pipe section 6 are connected with fastening bolts 1-6. After installation, vertical jacking begins.

[0049] When entering the top rock layer of the tunnel, the drive motor 9 is turned on to drive the cutter head main shaft 1-1, the cutter head main shaft 1-1 drives the horizontal shaft 1-3 to rotate, the horizontal shaft 1-3 drives the alloy rolling cutter head 1-2 and the main sealing plate 1-4, the lateral sealing plate 1-7, and the ring beam 1-5 to rotate, and the alloy rolling cutter head 1-2 enters the tunnel top rock layer to crush and cut; at the same time, the jack 8 is started to apply upward vertical jacking pressure to the jacking pipe section 6 and the jacking cutter head 1, and the entire vertical jacking system is jacked upward under the crushing and cutting action of the jack 8 and the jacking cutter head 1.

[0050] After one section of the jacking pipe section 6 is pushed forward, the jack 8 is retracted, and a new pipe section is installed under the jacking pipe section 6 and connected by tightening bolts 1-6; the replacement mud is transported into the cutter head 1 through the water pipe 2, and the cut soil and rock are formed into mud, which is then discharged to the ground outside the tunnel through the mud discharge pipe 3.

[0051] After vertical jacking reaches the mud surface on the seabed, stop the operation, reliably connect the lowest jacking pipe section 6 to the tunnel, remove the water inlet pipe 2 and mud discharge pipe 3, remove the vertical pole 4 and the lower base 10, jack 8, and drive motor 9, and let water flow into the tunnel 11 until the internal and external water pressures are balanced. Then, arrange personnel to dive to the jacking position at sea, open the water stop valve of the water pipe 5, and loosen bolts 1-6. Arrange lifting equipment to lift the jacking cutter head 1, and then install the inlet and outlet water grids on the top of the vertical pipe 6 to achieve tunnel penetration.

[0052] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A vertical jacking machine used for vertical jacking in rock tunnels, comprising a base (10), a vertical pole (4) vertically provided at the center of the base, a jack (8) and a drive motor (9) for jacking arranged on the base (10), and a jacking pipe section (6) installed above the jack (8), characterized in that: A jacking cutterhead (1) is installed on the top of the prefabricated jacking pipe section (6), and the jacking cutterhead (1) and the jacking pipe section (6) are fastened together by bolts (1-6); a main shaft (1-1) is provided in the vertical direction of the center of the jacking cutterhead (1), the main shaft (1-1) is connected to the vertical rod (4), and the driving motor (9) can drive the vertical rod (4) and the main shaft (1-1) to rotate; a plurality of transverse shafts (1-3) are also provided on the jacking cutterhead (1), and the axes of the transverse shafts (1-3) intersect perpendicularly with the axis of the main shaft (1-1); a plurality of alloy rolling cutter heads (1-2) are provided on the transverse shafts (1-3), and the alloy rolling cutter heads (1-2) crush and cut the tunnel top rock layer.

2. A vertical lifting machine according to claim 1, characterized in that: The lifting cutter disc (1) further comprises: a main sealing plate (1-4), a lateral sealing plate (1-7) and a ring beam (1-5); the ring beam (1-5) is arranged at the periphery of the lifting cutter disc (1); the main sealing plate (1-4) is welded between the ring beam (1-5) and the main shaft (1-1); and the lateral sealing plate (1-7) is arranged below the ring beam (1-5).

3. A vertical lifting machine according to claim 1, characterized in that: The vertical pole (4) and the main shaft (1-1) are made of long round steel pipes, and the horizontal shaft (1-3) is composed of section steel; the main sealing plate (1-4) and the lateral sealing plate (1-7) are made of steel plates.

4. A vertical lifting machine according to claim 1, characterized in that: The alloy rolling cutter head (1-2) is formed by casting the steel structure in one step.

5. The vertical lifting machine according to claim 1, characterized in that: It also includes a water inlet pipe (2) and a mud discharge pipe (3). The water inlet pipe (2) and the mud discharge pipe (3) are both made of round steel pipes and hoses and are equipped with water stop valves.

6. A vertical lifting machine according to claim 1, characterized in that: A water-stop gasket is provided at the connection between the lifting pipe section (6) and the lifting cutter disc (1).

7. A vertical lifting machine according to claim 1, characterized in that: The base (10) is arranged at a reserved notch position at the bottom of the tunnel. The base (10) is formed by welding a steel structure, and the base (10) is welded to the tunnel lining.

8. A vertical lifting machine according to claim 7, characterized in that: A water-stopping mechanism (7) is arranged around the reserved gap at the bottom of the tunnel, and the water-stopping mechanism (7) comprises a water-stopping frame (7-1) and a water-stopping ring (7-2).

9. A vertical lifting machine according to claim 8, characterized in that: The water stop ring (7-2) is made of an annular elastic water stop material.

10. The vertical lifting machine according to claim 1, characterized in that: The vertical pole (4) is a height-adjustable mechanism.

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