A construction method and cutting device for cutting rock platform of crane beam on rock wall of underground workshop

Abstract

The present invention is a cutting construction method and cutting device for a rock platform of a rock wall crane beam in an underground powerhouse. The present invention is applied to the cutting and excavation construction of a rock wall crane beam rock platform in an underground powerhouse. During the cutting construction of the rock wall crane beam rock platform, a rock wall crane beam cutting device is installed on the leveling concrete of the lower excavation surface, and a control system controls the movement and cutting of the cutting device, which greatly improves the excavation construction efficiency of the rock wall crane beam rock platform, reduces the construction interference caused by blasting, avoids loose circles and over-excavation and over-filling caused by geological reasons, and ensures the safety and stability of the rock wall crane beam rock platform.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy and hydropower engineering, and in particular to a cutting construction method and a cutting device for a crane beam rock platform on a rock wall of an underground powerhouse. Background Art

[0002] During the construction of water conservancy and hydropower projects, underground powerhouses are designed with rock wall crane beams, and large bridge cranes are installed on the crane beams for civil concrete construction and installation and maintenance of metal structures, electromechanical equipment. The rock wall crane beam uses long mortar-injected anchor rods to firmly anchor the reinforced concrete beam to the rock wall. Part of the beam body is supported on the inclined rock platform. The entire load of the bridge crane is transmitted to the rock wall beam platform through the friction between the long anchor rods and the reinforced concrete beam and the rock contact surface, and the compressive stress is borne by the compressed anchor rods and the inclined surface of the rock platform, making full use of the bearing capacity of the surrounding rock. The excavation and forming quality of the rock wall crane beam platform and the stability of the rock mass are the basis for the safe operation of the crane beam. Therefore, the excavation and construction of the rock wall crane beam of the powerhouse is the top priority of underground engineering. The rock wall crane beam platform is subjected to greater force and requires higher blasting control. The excavation of the rock wall crane beam platform requires that the over-excavation is as small as possible and the blasting loosening range is minimized. With the maturity and development of the existing technology, all rock wall crane beam and rock platform construction currently adopts vertical and oblique two-way controlled blasting excavation method. In the rock wall crane beam excavation construction, due to the strict requirements of particle vibration control, the loose circle must be controlled within 20cm and the over-excavation is less than 10cm. The conventional two-way controlled blasting method is used for construction. Due to the high quality of rock wall beam excavation and strict control of rock mass loose circle, it is difficult to meet the above requirements for drilling and blasting construction, and it is greatly affected by the geological conditions of the surrounding rock. Poor control will affect the stability of the rock mass at the position of the rock wall beam, and it will interfere with the construction of rock wall crane beam anchor rods and concrete. They cannot be carried out synchronously, and the construction efficiency is low. More manpower is invested, resulting in a certain waste of resources. The blasting method is affected by the factors of the surrounding rock geological conditions that are uncontrollable. Large geological over-excavation may occur, which requires reinforcing anchor rods and pouring reinforcing concrete, increasing the secondary construction costs, and it is easy to have the phenomenon of loose circle exceeding the standard, which requires reinforcement treatment. Therefore, how to overcome the shortcomings of the existing technology is an urgent problem to be solved in the field of water conservancy and hydropower engineering technology. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the prior art and to provide a cutting construction method and a cutting device for a rock wall crane beam and rock platform of an underground factory building, which overcomes the excessive loosening circle and over-excavation caused by blasting and excavation of the rock wall crane beam and rock platform, and ensures the stability of the rock mass reserved at the position of the rock wall beam and rock platform to the greatest extent.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A construction method for cutting rock platform of crane beam on rock wall of underground workshop,

[0006] 1) When excavating the upper part of the powerhouse, an upper vertical excavation surface is formed, and the upper horizontal excavation surface and the lower excavation surface of the outer excavation surface of the rock wall beam are excavated by blasting;

[0007] 2) Use concrete to level the lower excavation surface and lay a walking track so that the rock wall crane beam and rock platform cutting device can travel on the track;

[0008] 3) The vertical saw blade of the rock wall crane beam and rock platform cutting device is used to cut the vertical surface of the rock wall beam, and the inclined surface is cut by the inclined saw blade of the rock wall crane beam and rock platform cutting device to obtain the inclined surface of the rock wall beam. The vertical surface and the inclined surface are synchronously constructed with forward and backward staggered distances to complete the cutting work of the rock wall crane beam and rock platform of the underground factory.

[0009] A rock platform cutting device for a crane beam of an underground plant rock wall, comprising: a cutting device fixed frame, a vertical cutting mechanism, and an oblique cutting mechanism; the vertical cutting mechanism is fixed to the middle and upper part of the cutting device fixed frame, the vertical cutting mechanism comprises a vertical cutting saw blade, a vertical cutting transmission device, a vertical cutting motor, and a vertical cutting lifting device, the vertical cutting saw blade is connected to the vertical cutting transmission device, the vertical cutting transmission device is connected to the vertical cutting motor, the vertical cutting mechanism is also connected to the vertical cutting lifting device, and the vertical cutting lifting device is fixed to the vertical cutting lifting fixed beam; the oblique cutting mechanism comprises an oblique cutting saw blade, an oblique cutting transmission device, an oblique cutting motor, an oblique cutting lifting device, an oblique cutting fixed crossbeam, and an oblique cutting fixed oblique beam, the oblique cutting mechanism is fixed to the oblique cutting fixed crossbeam and the oblique cutting fixed oblique beam at the lower part of the cutting device fixed frame, the oblique cutting saw blade is connected to the oblique cutting transmission device, the oblique cutting transmission device is connected to the oblique cutting motor, the oblique cutting mechanism is also connected to the oblique cutting lifting device, and the oblique cutting lifting device is fixed to the oblique cutting fixed oblique beam;

[0010] The control system is connected with the vertical cutting motor and the oblique cutting motor through cables, and the cutting device fixing frame is placed on the leveling concrete through a walking track.

[0011] Furthermore, the vertical cutting lifting device is a screw-type lifting device and is controlled by an intelligent data system.

[0012] Furthermore, the oblique cutting lifting device is a chain-type lifting device and is controlled by an intelligent data system.

[0013] The cutting device fixing frame is made of steel into a square frame with a length × width × height of 13000mm × 6000mm × 12000mm. The vertical components are I30a I-beams, and the horizontal and oblique components are connected by "][" 30a double-back groove steel bolts.

[0014] The walking track adopts P23 type light rail, and the light rail is fixed on the leveling concrete with expansion bolts.

[0015] The vertical cutting mechanism and the oblique cutting mechanism are driven by an automatic driving walking device, and an intelligent system is set to control the uniform speed of advancement. The self-driving intelligent walking device is customized from the manufacturer.

[0016] The vertical cutting saw blade and the oblique cutting saw blade are made of alloy steel saw blades, and a cutter head is arranged on the saw teeth of the saw blade. The diameter of the vertical surface is φ4500mm, and the diameter of the oblique surface is φ4000mm.

[0017] The present invention is applied to the cutting and excavation construction of rock wall crane beams and rock platforms in underground workshops. During the cutting and construction of the rock wall crane beams and rock platforms, the rock wall crane beam cutting device is installed on the leveling concrete of the lower excavation surface, and the control system controls the movement and cutting of the cutting device, which greatly improves the excavation construction efficiency of the rock wall crane beams and rock platforms, reduces the construction interference caused by blasting, avoids loose circles and over-excavation and over-filling caused by geological reasons, and ensures the safety and stability of the rock wall crane beams and rock platforms.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The device of the present invention improves the existing two-way controlled blasting method for excavating rock wall crane beams and rock platforms into a method of using a rock wall crane beam and rock platform cutting device to synchronously cut in two directions at staggered intervals, thereby overcoming the problems of low blasting construction efficiency, high labor intensity, large construction interference, time-consuming and labor-intensive, blasting causing a loosening circle on the surrounding rock resulting in instability of the surrounding rock body, and over-excavation and over-filling caused by geological reasons. The present invention can reduce personnel input and labor intensity, overcome the blasting loosening circle, increase the stability of the surrounding rock of the rock wall crane beam and rock platform, improve the excavation speed of the rock wall crane beam and rock platform, greatly enhance the bearing capacity of the rock wall beam and rock platform, and avoid the interference caused by blasting construction, so as to achieve no over-excavation, avoid the risk of secondary costs caused by large over-excavation due to geological reasons, save construction costs, and improve the construction efficiency of the existing rock wall crane beam excavation by 40%, avoid the surrounding rock loosening circle and geological over-excavation, and reduce the over-excavation from the original 10 cm to 0, which can produce better economic and social benefits.

[0020] 2. The present invention belongs to the category of fundamental changes in the technical field of water conservancy and hydropower engineering, which will greatly promote the progress in technology and efficiency of rock wall crane beam and rock platform excavation in water conservancy and hydropower engineering. There are no related reports in the construction literature of rock wall crane beam and rock platform excavation in underground powerhouses at home and abroad.

[0021] 3. The present invention has not yet been applied in the construction of hydropower projects. It aims to reduce the input of personnel and the labor intensity of construction personnel, avoid the interference of blasting construction in the excavation construction of rock wall crane beam and rock platform, overcome the loosening circle of surrounding rock blasting and geological over-excavation and over-filling, improve efficiency, speed up the construction progress, and have high application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a schematic diagram of the underground factory rock wall crane beam rock platform cutting device and construction method of the present invention.

[0024] Figure 2 It is a side view of the underground factory rock wall crane beam rock platform cutting device of the present invention.

[0025] Figure 3 for Figure 2 AA cross-section diagram.

[0026] Figure 4 It is a top view of the rock wall crane beam rock platform cutting device.

[0027] Among them, 1. Rock wall crane beam and rock platform; 2. Vertical surface of rock wall beam; 3. Upper vertical excavation surface; 4. Leveling concrete; 5. Lower excavation surface; 6. Walking track; 7. Rock wall crane beam and rock platform cutting device: 71. Cutting device fixed frame; 72. Vertical cutting mechanism: 722. Vertical cutting motor; 723. Vertical cutting transmission device; 724. Vertical cutting lifting fixed beam; 724. Vertical cutting lifting fixed beam; 725. Vertical cutting lifting device; 73. Oblique cutting mechanism: 731. Oblique cutting saw blade; 732. Oblique cutting motor; 733. Oblique cutting transmission device; 734. Oblique cutting fixed beam; 735. Oblique cutting fixed oblique beam; 736. Oblique cutting lifting device; 74. Control system; traction system 75; 8. Inflection point on rock wall beam; 9. Inclined surface of rock wall beam; 10. Excavation surface outside rock platform; 11. Upper horizontal excavation surface; 12. Lifting equipment. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with embodiments.

[0029] Those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the field or the product instructions are used. The electrical appliances, lifting equipment, and saw blades used without specifying the manufacturer are all conventional products that can be purchased.

[0030] Embodiment 1:

[0031] like Figures 1 to 4As shown, a construction method for cutting the rock platform of the crane beam on the rock wall of an underground powerhouse is

[0032] 1) When excavating the upper part of the powerhouse, an upper vertical excavation surface 3 is formed, and the upper horizontal excavation surface 11 and the lower excavation surface 5 of the outer excavation surface of the rock wall beam are excavated by blasting method;

[0033] 2) Use concrete to level the lower excavation surface and lay a walking track 6 so that the rock wall crane beam rock platform cutting device 7 can travel on the track;

[0034] 3) The vertical saw blade of the rock wall crane beam and rock platform cutting device is used to cut the vertical surface 2 of the rock wall beam, the inclined surface is cut by the inclined saw blade of the rock wall crane beam and rock platform cutting device to obtain the inclined surface 9 of the rock wall beam, and the outer excavation surface 10 of the rock platform,

[0035] The upper vertical excavation surface 3 is located above the vertical surface 2 of the rock wall beam, 15 cm outside the vertical surface 2. The vertical surface 2 of the rock wall beam, the inclined surface 9, the outer excavation surface 10 of the rock platform, and the upper horizontal excavation surface 11 constitute the rock wall crane beam rock platform 1. The vertical surface 2 of the rock wall beam, the inclined surface 9, and the inflection point 8 on the rock wall beam are cut by the rock wall crane beam rock platform cutting device 7. The inflection point 8 on the rock wall beam is formed after the vertical surface 2 and the inclined surface 9 of the rock wall beam are cut. The upper horizontal excavation surface 11 is formed after the upper part of the cavern is excavated. The outer excavation surface 10 of the rock platform is obtained by vertical excavation after the upper horizontal excavation surface 11 is formed. On the inner side of the vertical surface 2 of the rock wall beam, the vertical surface and the inclined surface are synchronously constructed with a front-rear staggered distance to complete the cutting work of the rock wall crane beam rock platform of the underground factory.

[0036] The rock wall crane beam and rock platform cutting device 7 used in the above-mentioned construction is composed of a cutting device fixed frame 71, a vertical cutting mechanism 72 fixed on the cutting device frame 71, an oblique cutting mechanism 73, a control system 74 for controlling the cutting device, and a traction system 75 for driving the cutting device; the vertical cutting mechanism 72 is fixed to the middle and upper part of the cutting device fixed frame 71, and the vertical cutting mechanism 72 includes a vertical cutting saw blade 721, a vertical cutting transmission device 722, and a vertical cutting motor 723. The vertical cutting saw blade is connected to the vertical cutting transmission device 722, and the vertical cutting transmission device 722 is connected to the vertical cutting motor 723. The vertical cutting mechanism is also connected to a vertical cutting lifting device 725, and the vertical cutting lifting device is fixed on the vertical cutting lifting fixed beam 724, and is completely vertically cut by sliding and lifting on the vertical cutting lifting fixed beam 724. The oblique cutting mechanism 73 is fixed on the oblique cutting fixed horizontal beam 734 and the oblique cutting fixed oblique beam 735 at the lower part of the cutting device fixed frame 71. The oblique cutting mechanism includes an oblique cutting saw blade 731, an oblique cutting transmission device 732, and an oblique cutting motor 733. The oblique cutting saw blade is connected to the oblique cutting transmission device, and the oblique cutting transmission device is connected to the oblique cutting motor. The oblique cutting mechanism is also connected to an oblique cutting lifting device 736. The oblique cutting lifting device 736 adopts a chain type and is fixed on the oblique cutting fixed oblique beam 735. The oblique lifting movement of the oblique cutting lifting device 736 completes the oblique cutting. The control system 74 is connected to the vertical cutting motor 72 and the cutting motor of the oblique cutting mechanism 73 through cables. The cutting device fixed frame 71 is placed on the leveling concrete 4 (the leveling concrete is preferentially labeled as C20 normal plain concrete) through the walking track 6.

[0037] Preferably, the vertical cutting lifting device 725 uses a screw-type lifting device (existing equipment) and is controlled by an intelligent data system.

[0038] Preferably, the oblique cutting lifting device 736 adopts a chain lifting device (existing equipment) and is controlled by an intelligent data system.

[0039] Preferably, the walking track 6 adopts a P23 type light rail, and the light rail is fixed on the leveling concrete with expansion bolts.

[0040] Preferably, the vertical cutting mechanism and the oblique cutting mechanism are driven by an automatically driven walking device, an intelligent system is set to control the uniform speed of movement, and the self-driven intelligent walking device is customized from the manufacturer.

[0041] Preferably, the vertical cutting saw blade and the oblique cutting saw blade are alloy steel saw blades, and a cutter head is arranged on the saw teeth of the saw blade. The diameter of the vertical surface is φ4500mm, and the diameter of the oblique surface is φ4000mm.

[0042] Preferably, the cutting device fixing frame 71 is made of steel sections into a square frame with a length × width × height of 13000mm × 6000mm × 12000mm, the vertical components are I30a I-beams, the horizontal and oblique components are "][" 30a double-back groove steel bolts, the horizontal components have three layers of upper, middle and lower layers, and the layer spacing is 5600mm and 6400mm from low to high respectively. The components are connected by welding connecting plates and bolts to form a square shape. The oblique components are 65.0° with the horizontal direction, and a platform is set on each layer of the frame for personnel to operate.

[0043] The fixed frame is installed 200mm away from the outer excavation surface of the rock platform beam. After the frame is installed, the vertical surface cutting motor, vertical cutting transmission device, vertical cutting saw blade, V-belt, screw-type lifting device are installed in sequence. The vertical cutting saw blade 721 is not less than 15cm away from the upper vertical excavation surface as an operating space. Then install the oblique cutting motor, oblique transmission device, oblique cutting saw blade, V-belt, chain-type lifting device, and set a cutter head for each tooth of the vertical cutting saw blade and oblique cutting saw blade. Finally, install the traction system and control system. The control system is connected to each motor through a cable, and each motor is equipped with a control switch.

[0044] The vertical cutting transmission device 723 fixes the transmission shaft with a pulley on the vertical cutting lifting fixed beam 724 with bolts, connects to the belt rotating wheel on the vertical cutting motor with 4 V-belts, and is driven by the vertical cutting motor. It is an existing device.

[0045] The oblique cutting transmission device 733 fixes the transmission shaft of the pulley to the oblique cutting lifting fixed beams 734 on both sides with bolts, and is connected to the rotating gear of the oblique cutting motor with a chain and driven by the oblique cutting motor. It is an existing device.

[0046] The vertical cutting motor 722 adopts a three-phase asynchronous motor, which is fixed to the vertical cutting lifting fixed beam 724 with bolts, and the vertical cutting device is controlled to work through a control system.

[0047] The vertical cutting motor 732 adopts a three-phase asynchronous motor, which is fixed to the oblique cutting lifting fixed beam 734 with bolts, and the oblique cutting device is controlled to work through a control system.

[0048] The traction system 75 is driven by a motor with a gear box to drive a transmission chain and a steel roller, and the control system controls and drives the rock wall crane beam and rock platform cutting device to move automatically, which is an existing equipment.

[0049] Before use, the vertical upper excavation surface, the outer excavation surface and the lower excavation surface are excavated to form the rock wall crane beam rock platform. At the same time, the rock wall crane beam rock platform cutting device is processed and debugged in the factory outside the cave. Then, the slag on the lower horizontal excavation surface is leveled and rolled with a backhoe to pour the leveling concrete. The walking track is laid on the leveling concrete surface and the anchor bolts are driven to fix it. Then, the rock wall crane beam and rock platform cutting device is transported to the cave site for assembly and debugging. First, the vertical surface is cut to the inflection point by the screw-type lifting device, and then the inclined cutting saw blade is also cut to the inflection point of the rock wall crane beam and rock platform by the chain-type lifting device. Finally, the cutting construction of the rock wall crane beam and rock platform is started by horizontal walking of the self-propelled walking device. The rock wall crane beam and rock platform are continuously cut to form a rock wall beam. When cutting the rock platform, a lifting lug is set on the rock platform and fixed with a crane. After cutting, the crane is directly lifted to the dump truck for transportation. The invention is not only applicable to the cutting of rock wall crane beam rock platform, but also applicable to the cutting of high straight side walls of underground caverns, rock platforms of foundation pits, open-cut slope surfaces and the like.

[0050] The present invention is applied to the cutting and excavation construction of rock wall crane beams and rock platforms in underground workshops. During the cutting and construction of the rock wall crane beams and rock platforms, the rock wall crane beam cutting device is installed on the leveling concrete of the lower excavation surface, and the control system controls the movement and cutting of the cutting device, which greatly improves the excavation construction efficiency of the rock wall crane beams and rock platforms, reduces the construction interference caused by blasting, avoids loose circles and over-excavation and over-filling caused by geological reasons, and ensures the safety and stability of the rock wall crane beams and rock platforms.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rock platform cutting device for a crane beam on a rock wall of an underground powerhouse, characterized in that: include: A cutting device fixed frame, a vertical cutting mechanism, and an oblique cutting mechanism; the vertical cutting mechanism is fixed to the upper and middle part of the cutting device fixed frame, the vertical cutting mechanism includes a vertical cutting saw blade, a vertical cutting transmission device, a vertical cutting motor, and a vertical cutting lifting device, the vertical cutting saw blade is connected to the vertical cutting transmission device, the vertical cutting transmission device is connected to the vertical cutting motor, the vertical cutting mechanism is also connected to the vertical cutting lifting device, and the vertical cutting lifting device is fixed on the vertical cutting lifting fixed beam; the oblique cutting mechanism includes an oblique cutting saw blade, an oblique cutting transmission device, an oblique cutting motor, an oblique cutting lifting device, an oblique cutting fixed beam, and an oblique cutting fixed oblique beam, the oblique cutting mechanism is fixed to the oblique cutting fixed beam and the oblique cutting fixed oblique beam at the lower part of the cutting device fixed frame, the oblique cutting saw blade is connected to the oblique cutting transmission device, the oblique cutting transmission device is connected to the oblique cutting motor, the oblique cutting mechanism is also connected to the oblique cutting lifting device, and the oblique cutting lifting device is fixed on the oblique cutting fixed beam. The vertical cutting mechanism and the oblique cutting mechanism are staggered and cut synchronously; the control system is connected to the vertical cutting motor and the oblique cutting motor through a cable, and the cutting device fixed frame is placed on the leveling concrete through a walking track; the vertical cutting lifting device is a screw-type lifting device, and is controlled by an intelligent data system; the oblique cutting lifting device is a chain-type lifting device, and is controlled by an intelligent data system; the cutting device fixed frame is made of steel into a square frame with a length × width × height of 13000mm × 6000mm × 12000mm, the vertical member is I30a I-beam, and the horizontal and oblique members are connected by "]["30a double back groove steel bolts; the walking track adopts P23 light rail, and the light rail is fixed on the leveling concrete with expansion bolts; the vertical cutting saw blade and the oblique cutting saw blade adopt alloy steel saw blades, and a cutter head is arranged on the saw teeth of the saw blade, the diameter of the vertical surface is φ4500mm, and the diameter of the inclined surface is φ4000mm.

2. A cutting construction method for the underground plant rock wall crane beam rock platform cutting device according to claim 1, characterized in that: The following steps are followed: 1) When excavating the upper part of the factory building, an upper vertical excavation surface is formed, and the upper horizontal excavation surface and the lower excavation surface of the outer excavation surface of the rock wall beam are formed by blasting; 2) Concrete is used to level the lower excavation surface, and a walking track is laid so that the rock wall crane beam and rock platform cutting device can travel on the track; 3) The rock wall crane beam and rock platform cutting device uses a vertical saw blade to cut to form a vertical surface of the rock wall beam, and the inclined surface is cut by the inclined saw blade of the rock wall crane beam and rock platform cutting device to obtain the inclined surface of the rock wall beam. The vertical surface and the inclined surface are synchronously constructed with a front-rear staggered distance to complete the rock wall crane beam and rock platform cutting work of the underground factory building.

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