Rail installation method of underground cavern arch lifting equipment

Abstract

The invention discloses a rail installation method of underground cavern top arch hoisting equipment, which comprises the following steps of: S1, designing a rail layout scheme, and measuring and paying off on an underground cavern top arch; s2, fixing assemblies are installed, the multiple fixing assemblies are arranged along the center line of the track at intervals, each fixing assembly is composed of a pair of anchoring parts and a bearing part connected with the anchoring parts, the tops of the anchoring parts are anchored into the cavern top arch rock mass, and the bearing parts are fixedly connected with the exposed sections of the bottoms of the two anchoring parts; and S3, the rails are welded to the bearing pieces of all the fixing assemblies, and rail installation is completed. The rail installation method of the underground cavern top arch lifting equipment is convenient to construct, safe, reliable, low in investment cost and suitable for the situation that rail fixing embedded parts cannot be pre-embedded due to the fact that an underground cavern top arch is not provided with a reinforced concrete lining, and the operation requirement of the lifting equipment can be met.

Description

Technical Field

[0001] The invention relates to the technical field of underground cavern engineering construction, in particular to a track installation method for underground cavern top arch hoisting equipment. Background Art

[0002] Rail-mounted lifting equipment is widely used in factories, warehouses, and logistics. The quality of track installation is particularly crucial, directly impacting equipment life and operational safety. For typical industrial buildings, fixing the lifting equipment tracks to pre-embedded components in the reinforced concrete structure is sufficient. However, the situation is different in underground caverns, such as hydropower station powerhouses and underground laboratories of large scientific facilities. After excavation, the rock face is typically supported with only shotcrete support before being used directly as a room. To ensure the stability of the surrounding rock and uniform stress distribution, the cross-section of the cavern is typically designed in the shape of a city gate. Installing mobile lifting equipment in the cavern arch presents several challenges: Firstly, embedding track fixings directly within the surrounding rock of the cavern arch is extremely difficult; secondly, the excavated rock surface of the cavern arch is often uneven, further complicating the installation of the lifting equipment tracks within the cavern arch. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a track installation method for underground cavern arch hoisting equipment that is convenient to construct, safe and reliable, and the following technical solutions can be specifically adopted: The track installation method of the underground cavern arch hoisting equipment of the present invention comprises the following steps: S1: Design the track layout plan and measure and lay out the track at the underground cavern arch; S2, installing fixing assemblies, wherein a plurality of fixing assemblies are arranged at intervals along the centerline of the track, and each fixing assembly is composed of a pair of anchors and a supporting member connected thereto, wherein the top of the anchor is anchored into the rock mass of the cavern ceiling, and the supporting member is fixedly connected to the bottom exposed sections of the two anchors; S3, weld the rails to the supporting parts of each fixed component to complete the rail installation.

[0004] The fixing components are evenly spaced, and the spacing between adjacent fixing components is 2-3m.

[0005] The anchoring piece adopts a mortar anchor rod with a minimum diameter of 20 mm, the shortest length of the top anchored in the cavern arch rock mass is 2 m, and the minimum length of the exposed section at the bottom is 250 mm.

[0006] The anchors are symmetrically arranged on both sides of the center line of the track, and the two anchors in the same group are both located outside the track.

[0007] The supporting member is made of channel steel, the web of which is connected to the anchor member by welding, and the lower wing plate is connected to the track by welding.

[0008] The supporting members are symmetrically arranged along the center line of the track and extend to the outsides of the two anchoring members. The supporting members are connected to each anchoring member through two vertical fillet welds.

[0009] The track is a single track made of I-beams, and the intersection of the upper flange of the I-beam and the lower wing plate of the supporting member is connected by four horizontal fillet welds.

[0010] The track installation method for underground cavern ceiling arch hoisting equipment provided by the present invention is convenient to construct, safe and reliable, and has low investment costs. It is applicable to situations where the underground cavern ceiling arch is not provided with reinforced concrete lining, and where pre-embedded track fixing parts are not possible, and can meet the operating requirements of the hoisting equipment. By providing several groups of track fixing assemblies in the cavern ceiling arch, the method solves the disadvantage that conventional track fixing embedded parts are difficult to install in the ceiling arch surrounding rock. Secondly, the support member of the fixed structure can flexibly adjust its welding position with the anchor member according to the actual excavation conditions of the cavern, thereby ensuring that the installation height of the track of the hoisting equipment connected to the support member meets the design requirements, solving the problem of uneven excavation surface of the cavern surrounding rock, and providing a strong guarantee for the safe operation of the hoisting equipment suspended in the underground cavern ceiling arch. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the installation structure of the fixing assembly of the present invention.

[0012] Figure 2 yes Figure 1 AA cross-section diagram.

[0013] Figure 3 yes Figure 1 BB cross-section diagram. DETAILED DESCRIPTION

[0014] The following describes an embodiment of the present invention in detail with reference to the accompanying drawings. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process. However, the protection scope of the present invention is not limited to the following embodiment.

[0015] The track installation method of the underground cavern arch hoisting equipment of the present invention comprises the following steps: S1: Design the track layout plan and measure and lay out the track at the underground cavern arch; S2, installing fixing assemblies, wherein a plurality of fixing assemblies are arranged at intervals along the centerline of the track, and each fixing assembly is composed of a pair of anchors and a supporting member connected thereto, wherein the top of the anchor is anchored into the rock mass of the cavern ceiling, and the supporting member is fixedly connected to the bottom exposed sections of the two anchors; S3, weld the rails to the supporting parts of each fixed component to complete the rail installation.

[0016] like Figure 1-3 As shown, the anchoring members are vertically mounted mortar anchor rods 1, the supporting members are horizontally mounted channel steel 2, and the track 3 is a single track constructed of I-beams. Two mortar anchor rods 1 are symmetrically arranged on either side of the hoisting equipment's track 3. One end of each mortar anchor rod 1 is anchored into the rock mass 4 at the cavern's ceiling, while the other end (i.e., the exposed bottom section) is exposed within the cavern, extending at least 250mm beyond the surface of the sprayed concrete layer 5. The exposed portion of each mortar anchor rod 1 is connected to the web of the channel steel 2 via two vertical fillet welds 6. The lower flange of the channel steel 2 is connected to the upper flange of the I-beam track 3 via four horizontal fillet welds 7.

[0017] If cavern conditions permit, the aforementioned fixing components can be evenly spaced along the length of the track, with the spacing between adjacent fixing components being 2-3 meters. The diameter and anchoring length of the mortar anchor rod 1, the weld length and height of the vertical fillet weld 6, the weld length and height of the horizontal fillet weld 7, and the channel steel type are all determined through calculation based on the lifting capacity of the lifting equipment. HRB400 grade steel bars can be used for the mortar anchor rod 1. The recommended anchor rod diameter is no less than 20 mm, and the recommended anchoring length is no less than 2 meters. The spacing S between the two mortar anchor rods 1 in each fixing assembly is determined based on the width of the upper flange of the track 3, while also allowing for a certain amount of installation space. Typically, the two mortar anchor rods 1 are symmetrically positioned on either side of the centerline of the track 3, both located outside the track 3. This means that the spacing S between the mortar anchor rods 1 should be greater than the width of the track 3. The channel steel 2 is symmetrically arranged along the center line of the track 3 and extends to the outside of the two mortar anchor rods 1, that is, the channel steel 2 is set with a certain overhanging length relative to the mortar anchor rods 1. Generally, the length of the channel steel 2 can be selected as S+100mm.

[0018] During construction of the present invention, the track 3 laying route and the installation position of the fixed component are first determined according to the design drawing, and then the fixed component is installed, that is, the mortar anchor rod 1 is first anchored into the rock mass 4 of the cavern top arch, and then the channel steel 2 is welded between the two mortar anchor rods 1. When part or all of the fixed components are installed, the upper flange of the track 3 is welded to the lower wing plate of the channel steel 2 to complete the installation of the track 3.

[0019] The present invention can be flexibly adjusted according to the actual excavation conditions of the cavern, is convenient to construct, and has a safe and reliable structure, thus providing a guarantee for the safe operation of the lifting equipment suspended on the top arch of the underground cavern.

[0020] It should be noted that, in the description of the present invention, terms indicating orientation or positional relationships such as “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “inside”, and “outside” are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

Claims

1. A method for installing a track of an underground cavern arch hoisting device, characterized in that: The steps include: S1: Design the track layout plan and measure and lay out the track at the underground cavern arch; S2, installing fixing assemblies, wherein a plurality of fixing assemblies are arranged at intervals along the centerline of the track, and each fixing assembly is composed of a pair of anchors and a supporting member connected thereto, wherein the top of the anchor is anchored into the rock mass of the cavern ceiling, and the supporting member is fixedly connected to the bottom exposed sections of the two anchors; S3, weld the rails to the supporting parts of each fixed component to complete the rail installation.

2. The track installation method for underground cavern arch hoisting equipment according to claim 1, characterized in that: The fixing components are evenly spaced, and the spacing between adjacent fixing components is 2-3m.

3. The track installation method for underground cavern arch hoisting equipment according to claim 1, characterized in that: The anchoring piece adopts a mortar anchor rod with a minimum diameter of 20 mm, the shortest length of the top anchored in the cavern arch rock mass is 2 m, and the minimum length of the exposed section at the bottom is 250 mm.

4. The track installation method for underground cavern arch hoisting equipment according to claim 1, characterized in that: The anchors are symmetrically arranged on both sides of the center line of the track, and the two anchors in the same group are both located outside the track.

5. The track installation method for underground cavern arch hoisting equipment according to claim 1, characterized in that: The supporting member is made of channel steel, the web of which is connected to the anchor member by welding, and the lower wing plate is connected to the track by welding.

6. The method for installing a track of an underground cavern arch hoisting device according to claim 5, characterized in that: The supporting members are symmetrically arranged along the center line of the track and extend to the outsides of the two anchoring members. The supporting members are connected to each anchoring member through two vertical fillet welds.

7. The method for installing a track for an underground cavern arch hoisting device according to claim 5, characterized in that: The track is a single track made of I-beams, and the intersection of the upper flange of the I-beam and the lower wing plate of the supporting member is connected by four horizontal fillet welds.

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