Deep shaft supporting operation rack

Abstract

The utility model provides a deep shaft supporting operation rack. The deep shaft supporting operation rack comprises an operation rack body and at least two supporting layers. The operation rack is of a frame type structure, and frame layers with the number the same as that of the supporting layers or larger than that of the supporting layers are formed on the operation rack. The supporting layer is arranged on the basis of the frame layer, the supporting layer comprises transverse supporting rods capable of stretching outwards in the horizontal direction of the periphery of the working rack, the transverse supporting rods form a supporting face surrounding the periphery of the working rack after stretching out, and anchor rod connecting parts are arranged at the outer ends of the transverse supporting rods; the supporting layer further comprises movable meshes, and the movable meshes are used for being laid on a supporting face formed by the transverse supporting rods to form a working platform. The deep shaft supporting operation rack has the effects of improving the supporting operation efficiency and ensuring the shaft construction safety.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy and pumped storage engineering. Specifically, it relates to a deep shaft support working platform. Background Art

[0002] Shafts are common structures in water conservancy projects. Their construction methods vary according to different on-site actual conditions, but there is still a general context to follow.

[0003] The construction process of the shaft is accompanied by support. The usual support method is to follow the excavation or use a working platform.

[0004] Since the shaft excavation is carried out in the vertical direction, the shaft excavation support is different from that of the adit. In the adit, a certain distance can be maintained between the excavation surface and the support surface. Because the arch crown itself has the support ability, the support can be postponed. However, the distance between the support of the shaft and the excavation surface cannot be too large, otherwise it will cause suspended support and increase the safety risk of working at heights. Therefore, the overall construction progress is relatively slow.

[0005] Due to the particularity of the shaft construction environment, in most shaft projects, the support is no more than 2m - 3m each time. This situation restricts the construction progress of the shaft. However, during the construction of infrastructure, the construction period requirements are relatively strict. Therefore, it is necessary to conduct research and development on the support operation to improve the efficiency of shaft operation while ensuring safety. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art, and thus provide a deep shaft support working platform that improves the efficiency of support operation and ensures the safety of shaft construction.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is: a deep shaft support working platform, including a working platform and at least two layers of support layers;

[0008] The working platform is of a frame structure, and the working platform forms frame layers with the same number or more than the number of support layers;

[0009] The support layer is arranged based on the frame layer. The support layer includes horizontal support rods that can expand outwards in the circumferential direction of the working platform. After the horizontal support rods extend out, they form a support surface surrounding the working platform. The outer ends of the horizontal support rods are provided with bolt connection parts;

[0010] The support layer further includes a movable mesh, which is used to be laid on the support surface constructed by the horizontal support rods to form a working platform.

[0011] Preferably, a ladder is arranged on the working platform, and the ladder is used to connect each layer of frame layers.

[0012] Preferably, the horizontal projection surface of the working bench has a rectangular shape, and the transverse support rods are telescopically arranged in four directions of the working bench.

[0013] Preferably, perforations are provided on the frame layer corresponding to the transverse support rods.

[0014] Preferably, the transverse support rods in each direction in the same frame layer are arranged staggeredly.

[0015] Preferably, the working bench is formed by welding I-beams together, and the I-beams of the working bench are welded and fixed on both sides.

[0016] Preferably, the transverse support rods are steel pipes, and the anchor rod connection part is a pipe hole at the outer end of the steel pipe.

[0017] Preferably, the movable mesh is a steel bar mesh.

[0018] Preferably, the diameter of the lower layer steel bars of the steel bar mesh is larger than that of the upper layer steel bars.

[0019] Preferably, the outer end of the movable mesh is an arc surface, and the movable meshes around form a circular working platform after being assembled.

[0020] The utility model has substantial features and progress compared with the prior art. Specifically, the utility model uses the form of a bench to increase the number of single-shot support layers. When using this bench for underground operations, the original single-shot support per cycle is changed to multiple-shot supports per cycle (depending on the on-site rock conditions). The original support was carried out every 2 m - 3 m of excavation, and now it is carried out every 3 m - 5 m of excavation (specifically determined by the surrounding rock conditions and the support method, because it is not easy to support when the excavation is too deep), which speeds up the excavation progress, creates a working surface for support, and greatly improves the overall construction efficiency.

[0021] This bench can be used for operations such as installation of shaft wall steel bars, installation of steel arch frames, shaft wall bolt support, and shaft wall shotcrete. This bench has the characteristics of being easy to manufacture and having low cost. Description of the Drawings

[0022] Figure 1 is the working view of a deep shaft support working bench in the utility model.

[0023] Figure 2 is the top view of a deep shaft support working bench in the utility model in the working state.

[0024] Figure 3 is the distribution diagram of the support rods in one direction in the support layer of the utility model.

[0025] Figure 4It is the distribution diagram of the support rods in another direction in the support layer of the present utility model.

[0026] Figure 5 It is Figure 3 the structural schematic diagram of the unfolded state of the transverse support rods in the A-A direction in

[0027] Figure 6 It is Figure 3 the structural schematic diagram of the unfolded state of the transverse support rods in the B-B direction in

[0028] Figure 7 It is Figure 3 the structural schematic diagram of the unfolded state of the transverse support rods in the C-C direction in

[0029] Figure 8 It is Figure 3 the structural schematic diagram of the unfolded state of the transverse support rods in the D-D direction in

[0030] In the figure: 1. working platform frame; 2. support layer; 3. ladder; 21. transverse support rod; 22. movable mesh; 4. lifting hole; 5. steel wire rope; 6. vertical shaft. Specific embodiments

[0031] The technical solution of the present utility model will be further described in detail below through specific embodiments.

[0032] As Figures 1 - 8 shown, a deep vertical shaft support working platform frame includes a working platform frame 1, at least two support layers 2 and a ladder 3.

[0033] The working platform frame 1 is of a frame structure. Frame layers with the same number or more than the number of support layers are formed on the working platform frame 1. Taking this embodiment as an example, two support layers and three frame layers are set. The bottommost frame layer is used to support the working platform frame 1 itself, usually located at the bottom of the well, and can also be regarded as one support layer. The ladder is used to connect each frame layer.

[0034] In this embodiment, the material of the working platform frame 1 is I18 I-beam, and all connections of the I18 I-beam are welded on both sides to ensure its structural stability.

[0035] A lifting hole is provided at the top of the working platform frame 1, and it is usually hoisted into the vertical shaft 6 through a gantry crane and a steel wire rope 5.

[0036] In this embodiment, the horizontal projection surface of the working platform frame 1 is rectangular.

[0037] The support layer 2 is arranged based on the framework layer. The support layer 2 includes transverse support rods 21 that can telescopically extend outward in the horizontal direction along the circumference of the working bench. After the transverse support rods 21 extend out, a support surface surrounding the working bench for one week is formed. An anchor rod connection part is arranged at the outer end of the transverse support rods 21.

[0038] Specifically, in this embodiment, the transverse support rods 21 are telescopically arranged in four directions along the working bench. The transverse support rods 21 are made of steel pipes. Through holes are arranged on the framework layer corresponding to the transverse support rods 21. The transverse support rods 21 in each direction in the same framework layer are arranged in a staggered manner. The anchor rod connection part is a pipe hole at the outer end of the steel pipe and is used for inserting into the anchor rods on the well wall.

[0039] The support layer further includes a movable mesh 22. The movable mesh 22 is used for laying on the support surface constructed by the transverse support rods to form a working platform. As Figure 2 shown, the position indicated by the arrow is the position where part can be movably turned up.

[0040] In this embodiment, the movable mesh 22 is a steel bar mesh. The diameter of the lower-layer steel bars of the steel bar mesh is larger than that of the upper-layer steel bars. The outer end of the movable mesh 22 is an arc surface. The movable meshes around the perimeter are assembled to form a circular working platform.

[0041] During fabrication, first use I18 I-beams to fabricate the framework of the working bench, and then drill horizontal holes in different framework layers and install the transverse support rods. As shown in the figure, the two holes opposite to each other should be staggered to ensure that the steel pipes with a length of L = 3.5m do not collide when retracted. The hole diameter is 8cm, and the cut hole diameter should be polished to prevent sharp edges from hurting people.

[0042] The working bench has a total of 3 layers. The upper two layers need to be paved with steel bar meshes. Each layer of mesh is welded with steel bars. The thicker steel bars are located in the lower layer, and the thinner steel bars are located in the upper layer. The nodes of the mesh steel bars are welded, and the mesh is welded to the trolley. Note that there are 2 layers of movable meshes. The transverse braces extend out and are sleeved on the steel bars pre-drilled on the rock wall (here the steel bars penetrate into the rock by no less than 0.5m). After the mesh is extended, the distance from the well wall is not greater than 0.3m, which is convenient for lifting out the working bench after the mesh is retracted.

[0043] After the bench is fabricated, ladders need to be installed on both sides of the bench. The width of the ladder is 0.6m, and the spacing is 0.25m. It is welded with steel bars. The steel bars on both sides are threaded steel bars with a diameter of 25, and the steps are threaded steel bars with a diameter of 20 for operators to get on and off the bench. Necessary hooks are set on the trolley to facilitate the operators to hang tools. Holes with a diameter of not less than 0.5cm are respectively cut on the 4 columns of the bench. The purpose is to use a gantry crane to lower the bench into the well when the bench goes down the well, and the four-point lifting method is used during hoisting to ensure safety.

[0044] This device has been experimentally verified in the actual process. The project is completed based on the Jiufengshan Pumped-storage Power Station in Huixian, Henan. The power station mainly consists of buildings such as the upper reservoir, lower reservoir, water diversion system, underground powerhouse, surface switchyard, and water replenishment project. The total height of the swirl shaft in the lower reservoir diversion tunnel is 203.57 m. The swirl shaft includes the direct excavation section of the swirl shaft (above 535 m), the intake section of the swirl shaft (535 m - 500.00 m), the swirl shaft section (500.00 m - 371.20 m), and the outlet section of the swirl shaft (371.20 m - 334.33 m). Among them, the intake section is 35 m high (the excavation diameter gradually changes from 11.5 m to 8.5 m), the shaft section is 128.8 m high (the excavation diameter is 8.4 m from EL385 to EL500, and 9.5 m from EL371.2 to EL385), and the outlet section is 36.87 m high (the excavation diameter is 9.5 m). The lithology of the excavated rock is mainly quartz sandstone and marlstone, and the surrounding rock is mainly Class II, III, IV, and V surrounding rock. The main support forms of the initial support are: shotcrete with steel fiber and wire mesh, mortar bolts, steel arch frames and other support measures.

[0045] Before the shaft construction of this project, the inlet protection is carried out first, then about 20 m is excavated by the raise boring method, and then a pilot hole is constructed by a raise boring machine with a pilot hole diameter of 2.5 m. After the pilot hole is completed, the raise drill is used for excavation, and this working platform is used in cooperation with the support.

[0046] When in use, first use the existing gantry crane at the hole to lift the platform to the lower part. Pay attention to making the center of the working platform coincide with the center of the well as much as possible, so that the lowest layer of the platform completely covers the pilot hole to ensure the safety of underground operations. At the same time, the hook of the gantry crane is not removed to increase the safety reserve. After the platform is placed stably, extend a part of the cross braces on the upper and lower layers, drive support bolts on the shaft wall (the penetration into the rock is not less than 0.5 m, and the exposed part is not less than 0.3 m), then sleeve the outer ends of the cross braces on the support bolts, and then place the movable mesh on the surrounding horizontal supports and fix it firmly. Then the operators can work on the platform. This platform creates three working surfaces up and down, ensuring safety and accelerating the construction speed, thus improving the construction efficiency.

[0047] Finally, it should be noted that: The above detailed description of the preferred embodiment of this patent is given, but this patent is not limited to the above embodiment. Within the scope of knowledge possessed by those of ordinary skill in the art, various changes can be made without departing from the purpose of this patent.

Claims

1. A deep shaft support working platform, characterized in that: It includes a working bench frame and at least two layers of support layers; The working bench frame is of a frame structure, and on the working bench frame, frame layers with the same number as or more than the number of support layers are formed; The support layers are arranged based on the frame layers. The support layer includes transverse support rods that can telescopically extend outward in the horizontal direction along the perimeter of the working bench frame. After the transverse support rods extend out, a support surface surrounding the working bench frame is formed, and an anchor rod connection part is arranged at the outer end of the transverse support rods; The support layer further includes a movable mesh sheet, and the movable mesh sheet is used for being laid on the support surface constructed by the transverse support rods to form a working platform.

2. The deep shaft support working platform according to claim 1, wherein: A ladder is arranged on the working bench frame, and the ladder is used for connecting each layer of frame layers.

3. The deep shaft support working platform according to claim 1 or 2, characterized in that: The shape of the horizontal projection plane of the working bench frame is rectangular, and the transverse support rods are telescopically arranged along the four directions of the working bench frame.

4. The deep shaft support workbench according to claim 3, characterized in that: Perforations are arranged on the frame layers corresponding to the transverse support rods.

5. The deep shaft support working platform according to claim 4, wherein: The transverse support rods in each direction in the same frame layer are arranged in a staggered manner.

6. The deep shaft support working platform according to claim 5, wherein: The working bench frame is formed by welding I-beams together, and the I-beams of the working bench frame are welded and fixed on both sides.

7. The deep shaft support working platform according to claim 6, characterized in that: The transverse support rods are steel pipes, and the anchor rod connection part is a pipe hole at the outer end of the steel pipe.

8. The deep shaft support working platform according to claim 7, characterized in that: The movable mesh sheet is a steel bar mesh.

9. The deep shaft support working platform according to claim 8, wherein: The diameter of the lower-layer steel bars of the steel bar mesh is larger than that of the upper-layer steel bars.

10. The deep shaft support working platform according to claim 9, characterized in that: The outer end of the movable mesh sheet is an arc surface, and the movable mesh sheets around the perimeter are assembled to form a circular working platform.

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