Trolley capable of adapting to excavation and dust removal of tunnels in various surrounding rock forms

Abstract

The utility model discloses a trolley capable of adapting to excavation and dust removal of tunnels in various surrounding rock forms. The trolley comprises a frame with a construction platform, hydraulic telescopic rods are arranged at the lower ends of supporting legs at the four corners of the frame, and walking wheels are arranged at the lower ends of the hydraulic telescopic rods and provided with brakes. Ground supporting mechanisms are arranged on the left side and the right side of the frame and comprise upper transverse rods connected between the supporting legs, transverse supporting rods used for supporting the ground and adjusting rods distributed and connected between the upper transverse rods and the transverse supporting rods, the adjusting rods are vertical, and the length of the adjusting rods can be adjusted; spraying heads are distributed on the water pipe on the top and the two sides of the upper portion of the frame along the line. The trolley is suitable for tunnel section construction of different surrounding rock grades, the trolley does not need to be replaced, it is guaranteed that the excavation progress is efficient and safe, dust falling and cooling can be achieved, and dust is removed in a tunnel.

Description

Technical Field

[0001] The utility model relates to tunnel construction, in particular to a trolley that can adapt to tunnel excavation and dust removal for various surrounding rock forms. Background Technique

[0002] During tunnel construction, different geological conditions are often encountered. As the tunnel is excavated and advanced, the excavation section will experience various surrounding rock conditions, and it is necessary to adjust the excavation method according to the change of the surrounding rock state, such as the full-face method, the bench method, the ring excavation with reserved core soil method, the middle wall method, the drill and blast method, etc. Different excavation methods require different trolleys to provide a suitable construction platform. However, the space in the tunnel is narrow, and it is difficult to replace the traditional trolley. Moreover, the replacement process affects the operation of other teams, greatly affecting the construction efficiency.

[0003] In addition, during the construction process, sometimes it is necessary to vacate the construction face for other construction processes. The traditional trolley needs to be transported by loading machinery, and when the initial support is carried out, the trolley needs to be transported to the face, which is very cumbersome, delays the construction period, and consumes a lot of manpower.

[0004] In addition, the commonly used excavation method for highway tunnels is the drill and blast method. After blasting, a large amount of dust will be generated, which is very harmful to the human body. Generally, a ventilator is used to blow the ash layer out of the tunnel, with low dust removal efficiency and great environmental pollution. Content of the Utility Model

[0005] The purpose of the utility model is to provide a trolley that can adapt to tunnel excavation and dust removal for various surrounding rock forms, which is applicable to tunnel section construction with different surrounding rock grades, does not need to replace the trolley, ensures the high efficiency and safety of the excavation progress, can reduce dust and temperature, and the dust is solved in the tunnel.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A trolley that can adapt to tunnel excavation and dust removal for various surrounding rock forms includes a frame with a construction platform; hydraulic telescopic rods are provided at the lower ends of the legs at the four corners of the frame, walking wheels are provided at the lower ends of the hydraulic telescopic rods, and the walking wheels are equipped with brakes; ground support mechanisms are provided on both the left and right sides of the frame, and the ground support mechanism includes an upper cross bar connected between the legs, a cross strut for supporting the ground, and adjusting rods distributed and connected between the upper cross bar and the cross strut. The adjusting rods are vertical and can adjust their lengths; a water pipe is provided on the frame, and spray heads are distributed along the top and both upper sides of the frame on the water pipe.

[0008] Preferably, the adjusting rod includes an upper rod and a lower rod sleeved together. Bolt holes are distributed on both the upper rod and the lower rod, and the two are connected by bolts passing through the bolt holes.

[0009] Preferably, a valve for adjusting the water flow of the water pipe is provided on the frame.

[0010] Preferably, the cross strut is made of I-beam.

[0011] Preferably, the spray head is an atomizing spray head.

[0012] Preferably, the spacing between the spray heads is 60 cm.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The hydraulic telescopic rod can adjust the height of the entire trolley, can adapt to excavation and primary support operations under various excavation methods, is suitable for tunnel section construction with different surrounding rock grades, and does not require replacing the trolley, ensuring the high efficiency and safety of the excavation progress; the walking wheels and brakes can realize the movement and temporary fixation of the trolley, facilitating transfer and ensuring the personal safety of construction workers during temporary operations; the ground support mechanism can increase the ground bearing area, ensuring the stability and safety of the trolley during long-term and wide-range operations; the water pipes and spray heads can reduce dust and temperature, and can greatly reduce the impact of dust generated by blasting, drilling, mechanical vibration, etc. on the health of construction workers. The dust is solved inside the tunnel and will not be blown outside the tunnel by the blast air, polluting the environment. Description of the Drawings

[0015] Figure 1 is the front view of the trolley in the embodiment of the present utility model that can adapt to tunnel excavation and dust removal for various surrounding rock forms.

[0016] Figure 2 is the partial side view of the trolley in the embodiment of the present utility model that can adapt to tunnel excavation and dust removal for various surrounding rock forms.

[0017] In the figure: 1 - walking wheel; 2 - brake; 3 - hydraulic telescopic rod; 4 - leg; 5 - construction platform; 6 - spray head; 7 - valve; 8 - water pipe; 9 - upper cross bar; 10 - bolt hole; 11 - adjusting rod; 12 - cross strut. Detailed Embodiment

[0018] The present utility model will be further described below with reference to the drawings and embodiments.

[0019] This embodiment discloses a trolley that can adapt to tunnel excavation and dust removal for various surrounding rock forms, as Figure 1 and Figure 2As shown in the figure: it includes a vehicle frame with a construction platform 5; hydraulic telescopic rods 3 are provided at the lower ends of the legs 4 at the four corners of the vehicle frame, walking wheels 1 are provided at the lower ends of the hydraulic telescopic rods 3, and the walking wheels 1 are equipped with brakes 2; support mechanisms are provided on both the left and right sides of the vehicle frame, and the support mechanism includes an upper cross bar 9 connected between the legs 4, a cross strut 12 for supporting the ground, and adjusting rods 11 distributed and connected between the upper cross bar 9 and the cross strut 12. The adjusting rods 11 are vertical and their lengths can be adjusted; a water pipe 8 is provided on the vehicle frame, and spray nozzles 6 are distributed along the top and both upper sides of the vehicle frame. Among them, regarding the adjusting rod 11, preferably: the adjusting rod 11 includes an upper rod and a lower rod sleeved together, bolt holes 10 are distributed on both the upper rod and the lower rod, and the two are connected by bolts passing through the bolt holes 10. Among them, a valve 7 for adjusting the flow rate of the water pipe 8 can also be provided on the vehicle frame. Among them, the cross strut 12 preferably uses an I-beam. Among them, the spray nozzles 6 preferably use atomizing nozzles, and the spacing between the spray nozzles 6 is 60 cm.

[0020] The working method of this trolley is as follows

[0021] When changing from the full-section or two-bench excavation method to the three-bench excavation method: During the tunnel excavation process, different surrounding rock grades are often encountered. When the surrounding rock grade becomes weaker, it often changes from the full-section or two-bench excavation method to the three-bench excavation method. Under the condition that the tunnel section height is certain, after changing to the three-bench method, the construction working surface becomes lower, and the construction trolley needs to be lowered. At this time, the height of the entire trolley can be reduced through the hydraulic telescopic rod 3 to enable the trolley to smoothly enter the three-bench construction area. Then, first brake the walking wheel 1 brake 2, and then adjust the length of the adjusting rod 11 to make the cross strut 12 support the ground. Then, the construction workers perform operations such as drilling, excavation, and shotcreting on the construction platform 5. During the drilling process, the water pipe 8 can also be opened to reduce the dust content in the tunnel through the spray nozzles 6 and avoid the impact of harmful gases and dust on the health of construction workers.

[0022] When changing from the three-bench excavation method to the two-bench or full-section excavation method: When the surrounding rock grade of the tunnel becomes better, the tunnel excavation method can change from the three-bench excavation method to the two-bench or full-section excavation method, and the construction clearance becomes higher. To facilitate the tunneling operation and ensure the personal safety of construction workers, the trolley needs to be adjusted to the appropriate height in a timely manner. At this time, the height of the entire trolley can be increased through the hydraulic telescopic rod 3, the brake 2 can be released, and the cross strut 12 can be lifted to enable the trolley to enter the two-bench or full-section construction area. Then, first brake the walking wheel 1 brake 2, and then adjust the length of the adjusting rod 11 to make the cross strut 12 support the ground. Then, the construction workers perform operations such as drilling, excavation, and shotcreting on the construction platform 5. During the drilling process, the water pipe 8 can also be opened to reduce the dust content in the tunnel through the spray nozzles 6 and avoid the impact of harmful gases and dust on the health of construction workers.

[0023] When carrying out blasting mucking, dust reduction and temperature reduction operations: Drilling and blasting tunneling is the most commonly used tunneling method for highway tunnels. When using blasting excavation operations, the operators drill blast holes with the help of a jumbo. After blasting, a large amount of dust will be generated in the tunnel. And during the mucking process, the dust caused by construction machinery cannot be ignored. The water pipe 8 can be opened, and the dust content in the tunnel can be reduced through the spray head 6. Combined with the tunnel ventilation duct, dust treatment in the tunnel can be carried out. Moreover, the atomized spraying process can also dissolve a small amount of harmful gases and reduce the tunnel temperature, making the tunnel air fresh and avoiding the impact of harmful gases, dust and high temperature on the health of construction workers.

[0024] Under different geological conditions: It is necessary to change from the bench method construction to the ring excavation with reserved core soil method, the middle diaphragm method or the full face method, etc. Due to the change in the bench height, the height adjustment and support of the jumbo can be realized by adjusting the hydraulic telescopic rod 3 and the cross brace 12 to meet the construction requirements.

[0025] When the jumbo is evacuated and moved forward: When choosing tunneling excavation in tunnel construction, the jumbo is moved to a position near the heading face through the walking wheels 1. For temporary construction, the jumbo can be fixed by the brake 2 to prevent accidents such as personnel falling caused by the movement of the jumbo during the construction process. For construction operations in a long-term, wide-range or high-risk area, the cross brace 12 can be used to support the ground to increase the contact area and thus improve the stability and safety of the construction jumbo.

[0026] As can be seen from the above: The hydraulic telescopic rod 3 can adjust the height of the entire jumbo, can adapt to the excavation and initial support operations under various excavation methods, is suitable for tunnel section construction with different surrounding rock grades, and there is no need to replace the jumbo, ensuring the high efficiency and safety of the excavation progress; The walking wheels 1 and the brake 2 can realize the movement and temporary fixation of the jumbo, which is convenient for transfer and can ensure the personal safety of construction workers during temporary operations; The ground support mechanism can increase the ground contact area and ensure the stability and safety of the jumbo during long-term and wide-range operations; The water pipe 8 and the spray head 6 can reduce dust and temperature, and can greatly reduce the impact of dust generated by blasting, drilling, mechanical vibration, etc. on the health of construction workers. The dust is solved in the tunnel and will not be blown outside the tunnel by the air blower to pollute the environment.

[0027] The embodiments described above are some, but not all, of the embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

Claims

1. A trolley capable of adapting to tunnel excavation and dust removal in various surrounding rock forms, comprising a frame with a construction platform; characterized in that: Hydraulic telescopic rods are provided at the lower ends of the legs at the four corners of the frame, and walking wheels are provided at the lower ends of the hydraulic telescopic rods, and the walking wheels are equipped with brakes; ground-supporting mechanisms are provided on the left and right sides of the frame, and the ground-supporting mechanisms include an upper cross bar connected between the legs, a cross brace for supporting the ground, and an adjusting rod distributed and connected between the upper cross bar and the cross brace, and the adjusting rod is vertical and can adjust the length; a water pipe is provided on the frame, and sprinkler heads are distributed along the top of the frame and both sides of the upper part of the water pipe.

2. The trolley capable of adapting to tunnel excavation and dust removal in various surrounding rock forms as claimed in claim 1, characterized in that: The adjusting rod comprises an upper rod and a lower rod which are sleeved together. Bolt holes are distributed on both the upper rod and the lower rod and the two are connected by bolts passing through the bolt holes.

3. The trolley capable of adapting to tunnel excavation and dust removal in various surrounding rock forms as claimed in claim 1, characterized in that: The frame is provided with a valve for regulating the flow of the water pipe.

4. The trolley capable of adapting to tunnel excavation and dust removal in various surrounding rock forms as claimed in claim 1, characterized in that: The cross brace is made of I-beam.

5. The trolley capable of adapting to tunnel excavation and dust removal in various surrounding rock forms as claimed in claim 1, characterized in that: The sprinkler head adopts atomizing nozzle.

6. The trolley capable of adapting to tunnel excavation and dust removal in various surrounding rock forms as claimed in claim 1, characterized in that: The spacing between the sprinkler heads is 60cm.

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