Inclined shaft station structure intersecting with tunnel at small angle

Abstract

The utility model discloses an inclined shaft station structure intersected with a tunnel at a small angle, and relates to the technical field of inclined shaft stations. The device comprises a parking lot section which is connected with an inclined shaft section through a shaft bottom transition section; one end of the parking lot straight section is connected with the shaft bottom transition section, the other end is connected with the parking lot turning section, one end of the parking lot crossing section is connected with the parking lot turning section, and the other end is vertically connected with a tunnel; the side, close to the well bottom transition section, of the parking lot straight section is perpendicularly connected with the tunnel through a traffic hole. A winch lifting system is arranged in the inclined shaft section, the shaft bottom transition section and the parking lot straight line section and comprises a main lifting skip bucket and an auxiliary lifting skip bucket. The parking lot section is perpendicularly intersected with the tunnel, and the problems that when the inclined shaft and the tunnel are intersected at a small angle, a large excavation span is formed, and stability of surrounding rock is not facilitated are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of inclined shaft well bottom yard, more specifically it is a kind of inclined shaft well bottom yard structure with small angle intersection of tunnel. BACKGROUND

[0002] As an important channel for slagging, feeding and personnel transportation, the inclined shaft can provide another working face for long tunnel construction, realize long hole short punching, shorten construction period, and is widely applied in deep long tunnel construction engineering in recent years;Due to the large slope of inclined shaft, a horizontal hole section needs to be arranged at the well bottom as the well bottom yard for the transportation transition between inclined shaft and tunnel, which is the extremely important traffic and transportation hub of well bottom.

[0003] The common intersection mode of inclined shaft and tunnel is mostly right angle or large angle intersection;Due to the limitation of many factors such as terrain, traffic condition and geological condition, when arranging and designing inclined shaft, sometimes it is inevitable to arrange inclined shaft and tunnel with small angle intersection, which forms larger excavation span at intersection, and is not conducive to the stability of surrounding rock;Due to the limited space of inclined shaft well bottom yard, when the excavation and support workload of tunnel is large, if the yard section slagging and feeding transportation operation and personnel share a transportation channel, it will affect transportation efficiency and construction safety;That is, when inclined shaft and tunnel intersect with small angle straight line in the prior art, there are problems such as large intersection excavation span, poor stability of surrounding rock, difficult slagging and feeding transportation and low construction safety.

[0004] Therefore, it is necessary to develop an inclined shaft well bottom yard structure with small angle intersection of tunnel. CONTENT OF UTILITY MODEL

[0005] The utility model aims at overcoming the insufficient of the prior art, and provides an inclined shaft well bottom yard structure with small angle intersection of tunnel.

[0006] In order to achieve the above object, the technical scheme of the utility model is as follows: an inclined shaft well bottom yard structure with small angle intersection of tunnel, characterized by comprising a yard section, wherein the yard section is connected with inclined shaft section through well bottom gradual change section;The yard section comprises yard straight section, yard turning section and yard intersection section;

[0007] One end of the yard straight section is connected with well bottom gradual change section, and the other end is connected with yard turning section, one end of the yard intersection section is connected with yard turning section, and the other end is connected with tunnel vertically;The side of the yard straight section close to well bottom gradual change section is connected with tunnel vertically through traffic hole;

[0008] Winch lifting system is arranged in the inclined shaft section, well bottom gradual change section and yard straight section, and the winch lifting system comprises main hoist bucket and auxiliary hoist bucket;

[0009] The upper part of the turning section and the cross section of the yard is a residue storage area, the lower part is a hole residue transfer channel area, the straight section of the yard is a skip parking area, the connection part of the turning section and the straight section of the yard is a hole residue loading area for the main skip, and the connection part of the straight section of the yard and the traffic hole is a feeding and discharging area for the auxiliary skip.

[0010] In the above technical solution, the inclination angle of the inclined shaft section is 27°, and the cross-sectional size is 6.5m x 6.0m.

[0011] In the above technical solution, the bottom plate of the shaft bottom gradual change section is vertically circular arc-shaped, and the circular arc of the bottom plate of the shaft bottom gradual change section is tangent to the bottom plate of the inclined shaft section and the bottom plate of the straight section of the yard.

[0012] In the above technical solution, a traveling crane is arranged in the straight section of the yard.

[0013] In the above technical solution, the rock body width D1 between the straight section of the yard and the tunnel is greater than 2 times the excavation hole diameter, and the rock body width D2 between the traffic hole and the cross section of the yard is greater than 2 times the excavation hole diameter.

[0014] In the above technical solution, the radius of the circular arc of the bottom plate of the shaft bottom gradual change section is 36m.

[0015] In the above technical solution, the turning radius of the turning section of the yard is 15m.

[0016] In the above technical solution, the hole residue loading area adopts a PC200 excavator to load the hole residue in the yard section.

[0017] In the above technical solution, the cross section of the yard section is a city gate type, and the net cross-sectional size is 9m x 10m; and the cross section of the traffic hole is a city gate type, and the net cross-sectional size is 5.0m x 5.0m.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] 1) The yard section of the utility model is perpendicular to the tunnel, which avoids the problem of large excavation span and unstable surrounding rock when the inclined shaft and the tunnel intersect at a small angle.

[0020] 2) The bottom plate of the shaft bottom gradual change section is vertically circular arc-shaped, which can make the skip smoothly pass through the intersection of the inclined shaft and the yard section and safely run.

[0021] 3) The traffic hole is arranged between the yard section and the tunnel, so that the slag discharge, the feeding transportation and the personnel passing are separated, the lifting efficiency of the winch main hoist can be fully played, the mutual interference between the slag transfer and the feeding transfer is avoided, and the safety hidden danger is reduced; the secondary lining material can enter the tunnel from the traffic hole and avoid the slag discharge channel, so that the requirement of following the excavation for the secondary lining is met. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a function zoning diagram of the utility model.

[0023] Figure 2 It is a structure schematic diagram of the utility model.

[0024] Figure 3 It is Figure 1 The section view of F-F.

[0025] Figure 4 It is Figure 2 The section view of G-G.

[0026] Wherein, A is a slag storage area, B is a tunnel slag transfer channel area, C is a skip parking area, D is a tunnel slag loading area, E is a feeding and discharging area, 100 is a yard section, 110 is a yard straight section, 111 is a travelling crane, 120 is a yard turning section, 130 is a yard crossing section, 140 is a traffic hole, 200 is a shaft bottom gradual change section, 300 is an inclined shaft section, 400 is a tunnel, 500 is a winch lifting system, 510 is a main lifting skip, 520 is a vice lifting skip, and 530 is a track. DETAILED DESCRIPTION

[0027] The implementation of the utility model will be described in detail below in combination with the drawings, but they do not constitute the limitation of the utility model, but only serve as an example. At the same time, the advantages of the utility model will become clearer and easier to understand through the description.

[0028] As shown in the drawings, the utility model discloses a kind of inclined shaft shaft bottom yard structure with tunnel small angle intersection, it is characterized by comprising yard section 100, the yard section 100 is connected with inclined shaft section 300 by shaft bottom gradual change section 200;The yard section 100 includes yard straight section 110, yard turning section 120 and yard crossing section 130;

[0029] The yard straight section 110 is connected with shaft bottom gradual change section 200 in one end, and is connected with yard turning section 120 in other end, the yard crossing section 130 is connected with yard turning section 120 in one end, and is connected with tunnel 400 vertically in other end;The yard straight section 110 is connected with tunnel 400 vertically by traffic hole 140 in the side close to shaft bottom gradual change section 200;

[0030] The winch lifting system 500 is arranged in the inclined shaft section 300, the shaft bottom gradual change section 200 and the car park straight section 110, and the winch lifting system 500 comprises a main hoist 510 and a secondary hoist 520.

[0031] The upper part of the car park turning section 120 and the car park intersection section 130 is used as a residue storage area A, the lower part is used as a hole residue transfer channel area B, the car park straight section 110 is used as a skip parking area C, the connection part of the car park turning section 120 and the car park straight section 110 is used as a hole residue loading area D for the main hoist 510, and the connection part of the car park straight section 110 and the traffic hole 140 is used as a feeding and discharging area E for the secondary hoist 520.

[0032] The inclination angle of the inclined shaft section 300 is 27°, and the cross-sectional size is 6.5m x 6.0m.

[0033] The bottom plate of the shaft bottom gradual change section 200 is vertically circular arc-shaped, and the circular arc of the bottom plate of the shaft bottom gradual change section 200 is tangent to the bottom plates of the inclined shaft section 300 and the car park straight section 110.

[0034] The car park straight section 110 is provided with a travelling crane 111.

[0035] The rock body width D1 between the car park straight section 110 and the tunnel 400 is greater than 2 times the excavation hole diameter, and the rock body width D2 between the traffic hole 140 and the car park intersection section 130 is greater than 2 times the excavation hole diameter.

[0036] The radius of the circular arc of the bottom plate of the shaft bottom gradual change section 200 is 36m.

[0037] The turning radius of the car park turning section 120 is 15m.

[0038] The hole residue loading area D uses a PC200 excavator to load hole residue in the car park section 100.

[0039] The cross section of the car park section 100 is a city gate type, and the net cross-sectional size is 9m x 10m, and the cross section of the traffic hole 140 is a city gate type, and the net cross-sectional size is 5.0m x 5.0m.

[0040] The area and length required by the slag storage area A are calculated as follows: the daily slag output of the tunnel 300 upstream and downstream double working faces is V, the main hoisting completes one slag hoisting cycle time T1 = descending time + loading time + hoisting time + unloading time, the main hoisting volume is V1, the full load coefficient is a, and the actual transportation efficiency is b, then the main hoisting average hourly slag transportation volume V2 = V1 × a ÷ (T1 ÷ b); the single trip transportation time of the tunnel slag from the tunnel face to the slag storage area A is T2, and the single trip slag transportation volume is V3, then the required time T3 = V ÷ V3 × T2 for transporting the tunnel face slag to the slag storage area A; during the transportation, the synchronous slag transportation volume V4 = V2 × T3 of the main hoisting bucket 510, and the required slag storage volume V5 = V - V4 of the slag storage area A; the average height of the slag accumulation is h, then the required slag storage area S = V5 ÷ h of the slag storage area A, and the average width of the slag accumulation is D, then the required slag storage length L = S ÷ D of the slag storage area A.

[0041] Embodiment

[0042] Taking a water diversion project as an example, as shown in Figure 1 , 2 , an inclined shaft intersects with a water conveying tunnel at a small angle, the inclined shaft section 300 has an inclination of about 27°, and the cross-sectional size is 6.5m × 6.0m; the winch hoisting system 500 adopts a four-track double-line winch hoisting system, is equipped with two buckets, the main hoisting bucket 510 is used as a slag transportation and concrete mixture transportation special line, and the auxiliary hoisting bucket 520 is used as a steel supporting material and other auxiliary material and personnel transportation line.

[0043] As shown in Figure 3 , in the embodiment, the inclined shaft section 300 is smoothly connected with the yard straight section 110 through the shaft bottom gradual change section 200; the shaft bottom gradual change section 200 has a vertical circular arc-shaped bottom plate, which can smoothly transition and safely operate the main hoisting bucket 510 and the auxiliary hoisting bucket 520 when passing through the inclined shaft section 300 and the yard straight section 110; the circular arc-shaped bottom plate of the shaft bottom gradual change section 200 is tangent to the bottom plates of the inclined shaft section 300 and the yard straight section 110, and the radius of the circular arc is about 36m.

[0044] In the embodiment, the yard turning section 120 has a turning radius of about 15m, and the purpose of setting the yard turning section 120 is to make the yard section 100 vertically intersect with the tunnel 400, which can effectively reduce the excavation span of the intersection, is conducive to the stability of the surrounding rock of the intersection and the transportation of the upstream and downstream of the tunnel 400.

[0045] In this embodiment, the main and auxiliary skip 510 and 520 are lifted by the winch of the winch lifting system 500, and can only run in a straight line, and can only be lowered to the farthest yard straight section 110, and cannot reach the intersection of the yard section 100 and the tunnel 400 through the yard turning section 120, so that the slag discharge and feed transportation of the upstream and downstream working faces of the tunnel 400 need to be transferred at the yard section 100; due to the heavy transfer task of the yard section 100 and the limited space, it is difficult to simultaneously meet the slag discharge transportation and feed transportation of the double working faces of the tunnel 400; the main and auxiliary transportation operations will interfere with each other, and will also cause safety hazards to equipment and personnel, therefore, the traffic hole 140 is additionally arranged in the yard straight section 110, and is specially used for auxiliary feed transportation and pedestrian passing; the traffic hole 140 connects the yard straight section 110 and the tunnel 400, and is perpendicular to the tunnel 400.

[0046] In this embodiment, the yard section 100 is mainly used for main slag discharge and shotcrete mixture transportation and auxiliary material unloading; the yard section 100 needs to be provided with a slag storage area A, a tunnel slag transfer channel area B, a skip parking area C, a tunnel slag loading area D, and a feed unloading area E; the slag storage area A is used for temporarily stacking the slag discharged from the double working faces of the tunnel 400; the tunnel slag transfer channel area B is used for the tunnel slag transfer vehicle to pass through; the tunnel slag loading area D is used for the excavator to load the tunnel slag into the main skip 510; the skip parking area C is used for parking the main skip 510 and the auxiliary skip 520; the feed unloading area E is used for unloading the supporting feed and other auxiliary materials of the auxiliary skip 520; the yard straight section 110 is arranged with a travelling crane 111 for hoisting and transferring equipment and materials.

[0047] In this embodiment, the tunnel slag stacking and transportation process is that the tunnel slag in the tunnel 400 is transferred to the slag storage area A by a self-unloading vehicle, and at the same time, the excavator loads the tunnel slag into the main skip 510 at the tunnel slag loading area D, and then the tunnel slag is lifted to the ground to unload the slag and then returns to the bottom of the well to wait for loading.

[0048] The shotcrete mixture transportation process is that the main skip transports the shotcrete mixture to the yard straight section 110, and then the shotcrete mixture is transferred to the underground mixing station for mixing by a self-unloading vehicle, and does not need to be stacked in the yard section 100.

[0049] In this embodiment, the tunnel supporting material and other auxiliary material transportation process is that the material is transported to the skip parking area C by the auxiliary skip, the material is hoisted to the transportation vehicle in the feed unloading area E by the travelling crane 111, and then the material is transferred to the tunnel 400 through the traffic hole 140.

[0050] The secondary lining concrete transportation process is that the concrete is transported to the bottom of the well through the inclined shaft chute, the concrete is received by a concrete transportation tank vehicle, and then the concrete is transferred to the tunnel 400 through the traffic hole 140.

[0051] The length and cross-sectional dimensions of the yard section 100 must simultaneously meet the requirements for hoisting equipment and materials, storing tunnel muck, operating and passing construction equipment, and maintaining safe distances. In this embodiment, a PC200 excavator is used to load tunnel muck into the muck loading area D within the yard section 100. The minimum working width for the excavator loading is 8.4m, with a 30cm safety distance reserved on each side of the sidewalls. Therefore, the minimum width of the yard section 100 is 9m. The height of the yard section 100 must meet the requirements for the excavator's muck dredging and loading operation height and the equipment and material hoisting height. In this embodiment, the cross-section of the yard section 100 is a city gate shape, with a net cross-sectional dimension of 9m wide × 10m high.

[0052] In this embodiment, the required area and length of the slag storage area A are calculated as follows:

[0053] In this embodiment, the surrounding rock category upstream and downstream of Tunnel 400 is mainly Class IV. The daily advance per working face is 1.8m, and the excavation volume per linear meter of rock tunnel is 72.35m. 3 Assuming a looseness coefficient of 1.4, the daily muck production of a 400m³ tunnel is: 72.35 × 1.8 × 2 × 1.4 = 365m³. 3 .

[0054] The calculation method for the main hoisting (descent) time in this embodiment is as follows: Hoisting (descent) time = Start-up time + Acceleration time + Normal operating time + Deceleration time + Low-speed operating time; Calculated, the slag hoisting time in this embodiment is 6.13 min, the descent time is 4.6 min, the slag unloading and loading times at the wellhead and bottom are taken as 3 min and 10 min respectively, and the time for completing one cycle of skip slag transportation is: 4.6 + 3 + 10 + 6.13 = 24 min; The main hoisting volume in this embodiment is 10 m³. 3 With a full load factor of 0.8 and an actual transportation efficiency of 0.8, the average hourly slag transport volume of the main hoist is: 10 × 0.8 ÷ (24 ÷ 60 ÷ 0.8) = 16 m³ 3 In this embodiment, four 20-ton dump trucks were used to transport the tunnel slag, with each truck having a capacity of 12.5 cubic meters. 3 The vehicle's one-way trip and loading / unloading time is 6 minutes; therefore, the time required to transfer the tunnel slag from the tunnel face to the slag storage area A is: 365 ÷ (12.5 × 4) × 6 = 44 minutes; during the transfer, the main skip 510 can simultaneously transport the following amount of slag: 16 ÷ 60 × 44 = 12 m³. 3 Therefore, the volume of slag to be stored in slag storage area A is: 365 - 12 = 353 m³. 3 Assuming an average muck accumulation height of 2m, the required muck storage area for storage zone A in this embodiment is: 353 ÷ 2 = 176.5m². 2 .

[0055] according to Figure 1The width of the 100-meter section of the vehicle yard needs to simultaneously meet the sum of the width of the tunnel muck transfer channel area B and the width of the muck storage area A. In this embodiment, the required transfer channel width for the tunnel muck transfer vehicle is 4m, so the width of the muck storage area A is: 9-4=5m; and the required length of the muck storage area A is: 176.5÷5=35m.

[0056] The 140mm cross-sectional dimension of the traffic tunnel should at least allow for single-lane vehicle traffic and provide a certain safety distance. In this embodiment, steel, formwork, and other materials are mainly transported using a ZL50 wheel loader, and the secondary lining concrete is mainly constructed using 8m... 3 Concrete mixer trucks are used for transportation; the maximum width of the ZL50 wheel loader is 3.3m, with a safety distance of 80cm on both sides and a pedestrian walkway of 90cm. Therefore, the width of the 140mm traffic tunnel is taken as 5.0m; 8m 3 The concrete mixer truck is 3.8m high. To meet the safe passage requirements of both types of vehicles, the cross-section of traffic tunnel 6 is a city gate type, such as... Figure 3 As shown, the net cross-sectional dimensions are 5.0m wide × 5.0m high.

[0057] All other unspecified parts belong to the prior art.

Claims

1. A structure for a parking area at the bottom of an inclined shaft intersecting a tunnel at a small angle, characterized in that: It includes a parking lot section (100), which is connected to the inclined shaft section (300) through a bottom transition section (200); the parking lot section (100) includes a straight section (110), a turning section (120), and a crossing section (130); One end of the straight section (110) of the parking lot is connected to the bottom transition section (200) and the other end is connected to the turning section (120) of the parking lot. One end of the intersection section (130) of the parking lot is connected to the turning section (120) of the parking lot and the other end is perpendicularly connected to the tunnel (400). The straight section (110) of the parking lot is perpendicularly connected to the tunnel (400) through the traffic tunnel (140) on the side near the bottom transition section (200). The inclined shaft section (300), the bottom transition section (200), and the straight section of the yard (110) are equipped with a winch hoisting system (500), which includes a main skip (510) and a secondary skip (520). The upper part of the turning section (120) and the intersection section (130) of the parking lot is used as a slag storage area (A), and the lower part is used as a tunnel slag transfer channel area (B). The straight section (110) of the parking lot is used as a skip parking area (C). The connection between the turning section (120) and the straight section (110) of the parking lot is used as a tunnel slag loading area (D) for the main skip (510) to use. The connection between the straight section (110) of the parking lot and the traffic tunnel (140) is used as a feeding and unloading area (E) for the auxiliary skip (520) to use.

2. The inclined shaft bottom parking lot structure intersecting the tunnel at a small angle according to claim 1, characterized in that: The inclined section (300) has an inclination angle of 27° and a cross-sectional dimension of 6.5m wide × 6.0m high.

3. The inclined shaft bottom parking lot structure intersecting the tunnel at a small angle according to claim 2, characterized in that: The bottom plate of the well bottom transition section (200) is vertically arc-shaped, and the arc of the bottom plate of the well bottom transition section (200) is tangent to the bottom plate of the inclined shaft section (300) and the bottom plate of the straight section (110) of the vehicle yard.

4. The inclined shaft bottom parking lot structure intersecting the tunnel at a small angle according to claim 1, characterized in that: A gantry crane (111) is installed in the straight section (110) of the parking lot.

5. The inclined shaft bottom parking lot structure intersecting the tunnel at a small angle according to claim 1, characterized in that: The rock mass width D1 between the straight section (110) of the parking lot and the tunnel (400) is greater than twice the excavation diameter; the rock mass width D2 between the traffic tunnel (140) and the intersection section (130) of the parking lot is greater than twice the excavation diameter.

6. The inclined shaft bottom parking lot structure intersecting the tunnel at a small angle according to claim 3, characterized in that: The vertical radius of the arc-shaped bottom plate of the bottom transition section (200) is 36m.

7. The inclined shaft bottom parking lot structure intersecting the tunnel at a small angle according to claim 6, characterized in that: The turning radius of the turning section (120) in the parking lot is 15m.

8. The inclined shaft bottom parking lot structure intersecting the tunnel at a small angle according to claim 7, characterized in that: The tunnel muck loading area (D) uses a PC200 excavator to load tunnel muck into trucks in the yard section (100).

9. The inclined shaft bottom parking lot structure intersecting the tunnel at a small angle according to claim 8, characterized in that: The section of the parking lot (100) has a gate-shaped cross-section with a net cross-sectional dimension of 9m x 10m (width x height). The section of the traffic tunnel (140) has a gate-shaped cross-section with a net cross-sectional dimension of 5.0m x 5.0m (width x height).

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