Anti-floating, anti-shearing and leaking stoppage steel frame capable of enhancing strength of bottom sealing of vertical shaft

Abstract

The utility model discloses an anti-floating, anti-shearing and leaking stoppage steel frame capable of enhancing the strength of a vertical shaft sealing bottom, the steel frame comprises a U-shaped ring beam and a truss, the truss comprises a disc hinge, main truss beams and connecting beams, the main truss beams are arranged along the circumferential direction of the disc hinge, and the adjacent main truss beams are connected through the connecting beams; the U-shaped ring beam is formed by assembling a plurality of arc-shaped ring beams, each arc-shaped ring beam comprises a connecting bottom plate and fixing toes arranged at the upper end and the lower end of the connecting bottom plate respectively, and a U-shaped groove used for containing the main truss beam is formed between the connecting bottom plate and the fixing toes. The utility model has the advantages that the steel frame can enhance the strength of the plain concrete shaft bottom seal and resist buoyancy and shear force of underground water to the shaft bottom seal; the steel frame is adopted for secondary bottom sealing, and the water leakage problem of the bottom sealing of the vertical shaft can be further solved; the steel frame is fast and efficient to assemble and can also be prefabricated in a customized mode; the steel frame is composed of a plurality of components and is small in size, light in weight and convenient to hoist and construct.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of shaft construction, especially a reinforced shaft bottom sealing strength has anti -floating anti -shear leak -stop steel frame. BACKGROUND

[0002] With the rapid development of cities in China, urban renewal and reconstruction have become the future development trend. With the acceleration of urban renewal in China, the problem of underground space utilization is increasingly prominent. Major cities have built shaft garages to alleviate the problem of parking difficulty, underground water storage pools to adjust flood disasters and water resource recycling, and shafts as underground energy storage and underground energy storage space. The shaft construction method is divided into manual excavation construction, semi-mechanical excavation construction and mechanical excavation construction. For poor ground stability, the shaft sinking machine is usually used for construction. In the construction process, the shaft sinking machine needs to be submerged in water for construction. Especially in water-rich strata, especially in coastal cities, the shaft sinks to the designed depth, and there is a lot of strata water in the shaft wall. Shaft excavation is prone to thick mud skin inside the shaft wall, and pouring deep shaft bottom is easy to cause concrete segregation, causing bottom leakage. At the same time, the shaft bottom is usually made of mass concrete, and the shear strength of the bottom is insufficient, especially in water-rich strata, which is prone to bottom damage, and a reinforced shaft bottom strength with anti-floating and anti-shear leak-stop steel frame is urgently needed. SUMMARY

[0003] The utility model aims at according to the deficiency of above -mentioned prior art, provides a kind of reinforced shaft bottom strength with anti-floating and anti-shear leak-stop steel frame, the steel frame is composed of U-shaped ring beam and truss, truss includes disc hinge, main truss beam and connecting beam, main truss beam is set along disc hinge periphery, and adjacent main truss beam is connected by connecting beam, U-shaped ring beam is assembled by several arc ring beams, and arc ring beam includes connecting bottom plate and fixed toe respectively arranged in upper and lower ends of connecting bottom plate, and U-shaped groove for placing main truss beam is formed between connecting bottom plate and fixed toe. Steel frame can enhance the strength of plain concrete shaft bottom, resist the buoyancy and shear force of underground water on shaft bottom;Secondary bottom sealing is carried out using steel frame, which can further solve the problem of shaft bottom leakage.

[0004] The utility model aims at according to the deficiency of above -mentioned prior art, provides a kind of reinforced shaft bottom strength with anti-floating and anti-shear leak-stop steel frame, the steel frame is composed of U-shaped ring beam and truss, truss includes disc hinge, main truss beam and connecting beam, main truss beam is set along disc hinge periphery, and adjacent main truss beam is connected by connecting beam, U-shaped ring beam is assembled by several arc ring beams, and arc ring beam includes connecting bottom plate and fixed toe respectively arranged in upper and lower ends of connecting bottom plate, and U-shaped groove for placing main truss beam is formed between connecting bottom plate and fixed toe.

[0005] A reinforced shaft bottom strength with anti-floating and anti-shear leak-stop steel frame, the steel frame includes U-shaped ring beam and truss, the truss includes disc hinge, main truss beam and connecting beam, the main truss beam is set along the disc hinge periphery, and the adjacent main truss beam is connected by the connecting beam;The U-shaped ring beam is assembled by several arc ring beams, and the arc ring beam includes connecting bottom plate and fixed toe respectively arranged in upper and lower ends of the connecting bottom plate, and U-shaped groove for placing the main truss beam is formed between the connecting bottom plate and the fixed toe.

[0006] The main truss beam includes a chord, a diagonal web, a web connecting rod, a curved connecting plate, a reinforcement plate, a fixed plate and a reinforcement rod. There are four chords, and the four chords are arranged in a rectangular shape. The chords located at the same horizontal position and the chords located at the same vertical position are connected by diagonal webs, and the chords located at diagonal positions are connected by web connecting rods. One end of the four chords is connected to the curved connecting plate, and the other end is connected to the reinforcement plate. There are four reinforcement rods, and the four reinforcement rods are respectively located on the extension lines of the four chords. One end of the four reinforcement rods is connected to the reinforcement plate, and the other end is connected to the fixed plate.

[0007] One end of the main truss beam is hinged to the disk through a fastening bolt, and the other end is fixed to the arc-shaped ring beam through an anchor bolt.

[0008] The arc-shaped ring beam is fixed on the shaft wall by anchor bolts.

[0009] The advantages of the utility model are:

[0010] (1) The steel frame can enhance the strength of the plain concrete shaft bottom seal and resist the buoyancy and shear force of groundwater on the shaft bottom seal;

[0011] (2) Using steel frame for secondary bottom sealing can further solve the problem of water leakage in the bottom of the shaft;

[0012] (3) Steel frames can be assembled quickly and efficiently, and can also be customized and prefabricated;

[0013] (4) The steel frame is composed of multiple components, which is small in size and light in weight, making it easy to hoist and construct. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the steel frame of the utility model;

[0015] Figure 2 for Figure 1 Middle AA section;

[0016] Figure 3 This is a structural diagram of the main truss beam of the utility model;

[0017] Figure 4 This is a schematic structural diagram of the U-shaped ring beam of the utility model;

[0018] Figure 5 for Figure 4 Middle BB cross-section;

[0019] Figure 6 This is a schematic diagram of the position of the steel frame of the utility model installed in the shaft;

[0020] like Figures 1 to 6 As shown, the marks in the figure represent:

[0021] 1. Steel frame, 2. Vertical shaft, 3. Ground layer;

[0022] 11. U-shaped ring beam, 12. truss;

[0023] 111. Arc-shaped ring beam, 112. Fixed toe, 113. Connecting base plate, 114. Anchor bolt, 115. U-shaped groove, 116. Anchor bolt hole;

[0024] 121. Disc hinge, 122. Main truss beam, 123. Connecting beam;

[0025] 1211. Disc, 1212. Fastening bolt hole;

[0026] 1221. Upper chord, 1222. Lower chord, 1223. Diagonal web, 1224. Web connecting rod, 1225. Arc connecting plate, 1226. Reinforcement plate, 1227. Fixing plate, 1228. Reinforcement rod, 1229. Fastening bolts;

[0027] 21. Well wall, 22. Bottom seal, 23. Secondary bottom seal concrete, 24. Cracks. DETAILED DESCRIPTION

[0028] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:

[0029] Example: Figures 1 to 6As shown, this embodiment relates to a steel frame for strengthening the bottom seal of a vertical shaft, providing anti-floating, anti-shear, and leak-proof properties. The steel frame 1 is installed at the bottom of a vertical shaft 2 and above a bottom seal 22. The steel frame 1 is encased in secondary bottom seal concrete 23, forming a secondary bottom seal. The vertical shaft 2 is located within a stratum 3, and the bottom seal 22 has cracks 24. The steel frame 1 primarily comprises a U-shaped ring beam 11 and a truss 12. The truss 12 includes a disc hinge 121, main truss beams 122, and connecting beams 123. The main truss beams 122 are arranged circumferentially along the disc hinge 121, and adjacent main truss beams 122 are connected by connecting beams 123. The U-shaped ring beam 11 is assembled from a plurality of curved ring beams 111. The curved ring beams 111 include a connecting base plate 113 and fixed toes 112 disposed at the upper and lower ends of the connecting base plate 113. A U-shaped groove 115 is formed between the connecting base plate 113 and the fixed toes 112 for accommodating the main truss beams 122. In this embodiment, the vertical cross-section of the fixed toe 112 is a right-angled trapezoid, and anchor bolt holes 116 are provided on the fixed toe 112 and the connecting base plate 113, and the anchor bolt holes 116 cooperate with the anchor bolts 114. The disc hinge 121 is a disc 1211 with fastening bolt holes 1212, and the fastening bolt holes 1212 cooperate with the fastening bolts 1229; one end of the main truss beam 122 is connected to the disc hinge 121 by the fastening bolts 1229, and the other end is fixed to the arc-shaped ring beam 111 by the anchor bolts 114, and the arc-shaped ring beam 111 is fixed to the shaft wall 21 of the shaft 2 by the anchor bolts 114.

[0030] like Figures 1 to 5As shown, the main truss beam 122 includes a chord, a diagonal web 1223, a web link 1224, an arc-shaped connecting plate 1225, a reinforcement plate 1226, a fixed plate 1227 and a reinforcement rod 1228. There are four chords, including two upper chords 1221 and two lower chords 1222. The four chords are arranged in a rectangular shape. The chords at the same horizontal position and the chords at the same vertical position are connected by the diagonal web 1223. The diagonal web 1223 is cross-arranged, that is, the two cross-arranged diagonal webs 1223 are X-shaped, forming a group of diagonal webs 1223. The chords at the diagonal positions are connected by the web link 1224. The web link 1224 is also cross-arranged, that is, the two cross-arranged web links 1224 are X-shaped, forming a group of web links 1224. The four chord members are connected to arcuate connecting plates 1225 at one end and reinforcing plates 1226 at the other end. The shape and size of arcuate connecting plates 1225 match those of disk 1211, and fastening bolt holes 1212 are provided in arcuate connecting plates 1225. Four reinforcing rods 1228 are provided, located on the extension lines of the four chord members. One end of each reinforcing rod 1228 is connected to reinforcing plates 1226, and the other end is connected to fixing plates 1227. Fixing plates 1227 are provided with anchor bolt holes 116. Reinforcing rods 1228 and fixing plates 1227 are installed in U-shaped grooves 115 of arcuate ring beam 111.

[0031] like Figures 1 to 6 As shown, this embodiment also has two construction methods, one is a microbial induced advance curtain and secondary bottom sealing method inside the vertical shaft, and the other is a microbial induced advance curtain and secondary bottom sealing method outside the vertical shaft.

[0032] Specifically, the steps of the microbial-induced advance curtain and secondary bottom sealing method in the vertical shaft are as follows:

[0033] S1: Grouting is performed from the inside of the shaft 2 into the cracks 24 of the bottom seal 22 of the shaft 2 and into the soil layer at the bottom of the bottom seal 22 .

[0034] The method for grouting from the inside of the shaft 2 is as follows:

[0035] Use a drill rod with a drill bit to drill grouting holes at intervals along the circumference of the bottom cover 22, and extend the bottom of the grouting hole to 0.3m below the bottom of the bottom cover 22. Pull out the drill rod, insert the grouting pipe into the grouting hole, and make the bottom of the grouting pipe be located at the bottom of the grouting hole. Inject inorganic slurry (water glass slurry or water glass and cement mixed slurry) into the soil layer at the bottom of the bottom cover 22 to complete the grouting of the soil layer at the bottom of the bottom cover 22 and form an advance curtain. Replace the inorganic slurry with microbial slurry (Bacillus pasteurianus slurry), pull the grouting pipe to the interface between the bottom cover 22 and the soil layer at the bottom of the bottom cover 22, and inject microbial slurry into the interface to complete the grouting of the interface. While pulling out the grouting pipe, continue the grouting operation until the bottom of the grouting pipe leaves the top surface of the bottom cover 22, completing the grouting of the cracks 24 and the grouting holes of the bottom cover 22.

[0036] S2: Remove the formation water and mud residue in shaft 2.

[0037] S3: Hoist the U-shaped ring beam 11 to the top surface of the bottom cover 22 and fix the U-shaped ring beam 11 to the inner wall 21 of the shaft 2. Hoist the truss 12 and fix it to the U-shaped ring beam 11 to form the steel frame 1.

[0038] S4: pouring the secondary bottom seal concrete 23 and vibrating and compacting it to form the secondary bottom seal.

[0039] The microbial induced advance curtain and secondary bottom sealing plugging method outside the vertical shaft is the same as step 1 except that the microbial induced advance curtain and secondary bottom sealing plugging method inside the vertical shaft is different from step 1. The remaining steps (steps S2 to S4) are the same and will not be repeated here.

[0040] Step S1 of the method for plugging leaks by microbial-induced advanced curtain and secondary bottom sealing outside the shaft is: grouting is performed from the outside of the shaft 2 into the cracks 24 of the bottom sealing 22 of the shaft 2 and into the soil layer at the bottom of the bottom sealing 22 .

[0041] The method of grouting from the outside of the shaft 2 is as follows:

[0042] Using a drill rod with a directional drill bit, grouting holes are drilled downward at intervals of 1 meter along the soil outside the circumference of shaft 2. When the directional drill bit approaches 1-2 meters below the bottom of bottom seal 22, the directional drill bit is controlled to drill toward shaft 2, extending the bottom of the grouting hole to the bottom of bottom seal 22. The drill rod is removed, and the grouting pipe is inserted into the grouting hole, with the bottom of the grouting pipe positioned at the bottom of the grouting hole. A microbial slurry (Bacillus pasteurianus slurry) is injected into the soil layer at the bottom of bottom seal 22 and into the cracks 24 of bottom seal 22, completing the grouting of the soil layer at the bottom of bottom seal 22 and the cracks 24 of bottom seal 22, forming an advance curtain. The grouting operation is continued while the grouting pipe is withdrawn until the bottom of the grouting pipe clears the top surface of the soil outside the circumference of shaft 2.

[0043] The beneficial technical effects of this embodiment are:

[0044] (1) The steel frame can enhance the strength of the plain concrete shaft bottom seal and resist the buoyancy and shear force of groundwater on the shaft bottom seal;

[0045] (2) Using steel frame for secondary bottom sealing can further solve the problem of water leakage in the bottom of the shaft;

[0046] (3) Steel frames can be assembled quickly and efficiently, and can also be customized and prefabricated;

[0047] (4) The steel frame is composed of multiple components, which is small in size and light in weight, making it easy to hoist and construct.

[0048] Although the above embodiments have described the concepts and embodiments of the present invention in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, so they are not described here one by one.

Claims

1. A steel frame for strengthening the bottom sealing strength of a vertical shaft and having anti-floating, anti-shear and leak-proof functions, characterized by: The steel frame includes a U-shaped ring beam and a truss, and the truss includes a disc hinge, a main truss beam and a connecting beam. The main truss beam is arranged along the circumference of the disc hinge, and adjacent main truss beams are connected by the connecting beam; the U-shaped ring beam is assembled from a plurality of arc-shaped ring beams, and the arc-shaped ring beam includes a connecting base plate and fixed toes respectively provided at the upper and lower ends of the connecting base plate, and a U-shaped groove for placing the main truss beam is formed between the connecting base plate and the fixed toe.

2. A steel frame for strengthening the bottom sealing strength of a vertical shaft and having anti-floating, anti-shear and leak-proof functions as claimed in claim 1, characterized in that: The main truss beam includes a chord, a diagonal web, a web connecting rod, a curved connecting plate, a reinforcement plate, a fixed plate and a reinforcement rod. There are four chords, and the four chords are arranged in a rectangular shape. The chords located at the same horizontal position and the chords located at the same vertical position are connected by diagonal webs, and the chords located at diagonal positions are connected by web connecting rods. One end of the four chords is connected to the curved connecting plate, and the other end is connected to the reinforcement plate. There are four reinforcement rods, and the four reinforcement rods are respectively located on the extension lines of the four chords. One end of the four reinforcement rods is connected to the reinforcement plate, and the other end is connected to the fixed plate.

3. The steel frame for strengthening the bottom sealing strength of a vertical shaft and having anti-floating, anti-shear and leak-proof functions as claimed in claim 1 is characterized in that: One end of the main truss beam is hinged to the disk through a fastening bolt, and the other end is fixed to the arc-shaped ring beam through an anchor bolt.

4. A steel frame for strengthening the bottom sealing strength of a vertical shaft and having anti-floating, anti-shear and leak-proof functions as claimed in claim 1, characterized in that: The arc-shaped ring beam is fixed on the shaft wall by anchor bolts.

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