Steel sleeve concrete bottom plate hanging box device

Abstract

The utility model relates to the technical field of bridge engineering, and discloses a steel sleeve concrete bottom plate hanging box device which comprises a hanging box mechanism and a supporting mechanism, the supporting mechanism is arranged at the bottom of the hanging box mechanism, the hanging box mechanism comprises a splicing unit and a hanging unit, the splicing unit is connected to the top of the supporting mechanism, and the hanging unit is connected with the splicing unit. And the hanging unit is arranged above the splicing unit. According to the steel sleeve concrete bottom plate hanging box device, the steel consumption is reduced, the cost is reduced, after the steel hanging box is put down, only concrete between the steel casing and the steel sleeve needs to be poured, large-area underwater bottom sealing concrete pouring does not need to be conducted, the cost is reduced, the bottom sealing effect is good, an assembling platform is erected above the water surface, the bottom plate and the side edges are convenient and rapid to assemble, and the construction efficiency is improved. And water stopping of the connecting parts between the bottom plate and the side plates is easier to control, a prefabricated combined splicing structure is adopted, underwater operation is reduced, and safety is higher.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, specifically to a steel-casing concrete base plate hoisting device. Background Technology

[0002] In bridge construction, the proportion of construction in water areas is increasing. Piers are generally located below the normal water level. Therefore, cofferdams are usually set up in advance to provide a good working environment for pier construction. Currently, the common types of cofferdams are steel sheet pile cofferdams and steel caisson cofferdams. Steel caissons are often used in deep water environments. Steel caisson cofferdams are further divided into bottomless steel caisson cofferdams and bottomed steel caisson cofferdams. Bottomed steel caisson cofferdams are more commonly used in deep water environments.

[0003] However, the existing technology still has the following shortcomings: steel caisson cofferdams with bottoms generally use steel plates and structural steel to make the bottom plate and side plates of the steel caisson, and then pour bottom sealing concrete after it is lowered into place. This process requires a large amount of steel and has high construction costs. In addition, there are many uncontrollable factors in pouring underwater bottom sealing concrete, and the construction quality of underwater concrete is difficult to guarantee. Utility Model Content

[0004] The purpose of this utility model is to provide a steel-cased concrete base slab caisson device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a steel-casing concrete base slab caisson device, comprising a caisson mechanism and a support mechanism, wherein the support mechanism is disposed at the bottom of the caisson mechanism.

[0006] The hoisting mechanism includes a splicing unit and a hanging unit. The splicing unit is connected to the top of the support structure, and the hanging unit is located above the splicing unit.

[0007] Preferably, the splicing unit consists of a concrete base slab, a steel casing, a steel sleeve, an L-shaped step, bolt holes, side plates, and precision-rolled threaded steel bars. The steel casing is placed on the concrete base slab, the steel sleeve is placed inside the steel casing, the L-shaped step is fixedly connected to the perimeter of the concrete base slab, the bolt holes are opened on the surface of the L-shaped step, the side plates are installed on the top of the L-shaped step, and the precision-rolled threaded steel bars pass through the bolt holes, serving as a splicing and connecting element.

[0008] Preferably, the suspension unit consists of a suspension beam and a hydraulic jack. The suspension beam is located on top of the steel sleeve, and the hydraulic jack is located on top of the suspension beam. The force is transferred from the support system to the suspension system, and the temporary support is removed.

[0009] Preferably, the support mechanism consists of a corbel, a double-I-beam crossbeam, and a distribution beam. The corbel is located below the caisson mechanism, the double-I-beam crossbeam is located on top of the corbel, and the distribution beam is installed on top of the double-I-beam crossbeam, serving as a splicing support platform for the concrete base slab.

[0010] Preferably, waterstop strips are provided on the bottom and side walls of the L-shaped step, as well as between the side plates, to ensure that the concrete base plate and the side plates are in close contact.

[0011] Preferably, the side plates are connected by bolts to serve as a connection and mating mechanism.

[0012] Preferably, the concrete base slab is prefabricated in a centralized manner, and the concrete base slabs are connected by wet joints to facilitate assembly.

[0013] Preferably, the steel sleeve is welded with a sealing plate and has a stiffening plate inside to improve its strength.

[0014] Preferably, the diameter of the steel sleeve is 60 centimeters larger than that of the steel casing, and the length of the steel sleeve is not less than 1.6 meters, which facilitates concrete pouring.

[0015] Preferably, the side plate is provided with a water-passing connector, and the connector is located below the lowest water level. This keeps the connector open until the concrete inside the steel casing reaches the design strength, preventing water pressure differences between the inside and outside of the steel casing, which could lead to poor bonding between the concrete and the steel casing and easy water seepage. Once the concrete reaches the design strength, the connector is closed, and water is pumped out of the steel casing.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This steel-casing concrete base plate caisson device reduces the amount of steel used and lowers costs. After the steel caisson is lowered, only the concrete between the steel casing and the steel sleeve needs to be poured. There is no need to pour a large area of ​​underwater bottom sealing concrete, which reduces costs and provides a good sealing effect.

[0018] 2. The steel-casing concrete base slab hoisting device uses a precast base slab, which reduces underwater concrete construction and ensures the quality of the concrete base slab.

[0019] 3. The steel-casing concrete base plate caisson device has an assembly platform erected above the water surface, which makes the assembly of the base plate and sides convenient and quick, and the water stop at the connection between the base plate and the side plate is easier to control.

[0020] 4. The steel-casing concrete base caisson device has high cohesion between the steel casing, steel sleeve and concrete, and strong load-bearing capacity and anti-buoyancy capacity of the steel caisson.

[0021] 5. The steel-casing concrete base caisson device adopts a prefabricated and assembled structure, which reduces underwater operations and enhances safety. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the steel casing structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the supporting structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the present invention in the concrete pouring state;

[0025] Figure 4 This is a side view of the structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of the present invention in the completed construction state.

[0027] In the diagram: 1. Hoisting mechanism; 101. Concrete base slab; 102. Steel casing; 103. Steel sleeve; 104. L-shaped step; 105. Bolt hole; 106. Side plate; 107. Precision rolled threaded steel; 111. Hanging beam; 112. Hydraulic jack; 2. Support mechanism; 201. Bracket; 202. Double-jointed I-beam crossbeam; 203. Distribution beam. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-5 The present invention provides the following technical solution: a steel sleeve concrete base plate caisson device, including a caisson mechanism 1 and a support mechanism 2, wherein the support mechanism 2 is disposed at the bottom of the caisson mechanism 1.

[0030] The hoisting mechanism 1 includes a splicing unit and a hanging unit. The splicing unit is connected to the top of the support mechanism 2, and the hanging unit is located above the splicing unit.

[0031] The splicing unit consists of a concrete base slab 101, a steel casing 102, a steel sleeve 103, an L-shaped step 104, bolt holes 105, side plates 106, and precision-rolled threaded steel bars 107. The concrete base slab 101 is prefabricated in a centralized manner, and the concrete base slabs 101 are connected by wet joints to facilitate assembly. The steel casing 102 is installed on the concrete base slab 101, and the steel sleeve 103 is installed inside the steel casing 102. The steel sleeve 103 is welded with a sealing plug. The concrete base slab 101 is reinforced with internal stiffeners to enhance its strength. The diameter of the steel sleeve 103 is 60 centimeters larger than that of the steel casing 102, and the length of the steel sleeve 103 is not less than 1.6 meters, facilitating concrete pouring. L-shaped steps 104 are fixedly connected to the perimeter of the concrete base slab 101. Waterstop strips are installed on the bottom and side walls of the L-shaped steps 104, as well as between the side plates 106, ensuring a tight fit between the concrete base slab 101 and the side plates 106. The side plates 106... A water-passing connector is installed below the lowest water level. This keeps the connector open until the concrete inside the steel sleeve 103 reaches its design strength, preventing a water pressure difference between the inside and outside of the steel caisson, which could lead to poor bonding between the concrete and the steel sleeve 103 and cause water seepage. Once the concrete reaches its design strength, the connector is closed, and water is pumped out of the steel caisson. Bolt holes 105 are located on the surface of the L-shaped step 104, and side plates 106 are installed on the top of the L-shaped step 104. Side plates 106 are connected by bolts, serving as a connection. High-strength threaded steel bars 107 penetrate the bolt holes 105, serving as a splicing connection. The suspension unit consists of a suspension beam 111 and a hydraulic jack 112. The suspension beam 111 is located on the top of the steel sleeve 103, and the hydraulic jack 112 is located on the top of the suspension beam 111. The force is transferred from the support system to the suspension system, and temporary supports are removed.

[0032] The support mechanism 2 consists of a corbel 201, a double-jointed I-beam crossbeam 202, and a distribution beam 203. The corbel 201 is located below the lifting box mechanism 1, the double-jointed I-beam crossbeam 202 is located on top of the corbel 201, and the distribution beam 203 is installed on top of the double-jointed I-beam crossbeam 202, serving as a splicing support platform for the concrete base plate 101.

[0033] In use, a corbel 201 is welded above the normal water level. A double-span I-beam crossbeam 202 is installed on the corbel 201, and a distribution beam 203 is installed on the double-span I-beam crossbeam 202 as a support platform for splicing the concrete base slab 101. The prefabricated concrete base slab 101 is transported to the site and hoisted onto the assembly platform using hoisting equipment. Then, wet joints are poured on the assembly platform. Waterstop strips are installed on the bottom and side walls of the L-shaped step 104 of the concrete base slab 101. Side plates 106 are installed, and waterstop strips are installed between side plates 106. Side plates 106 are connected to each other with bolts. A threaded steel bar 107 is installed as a connector between the concrete base slab 101 and side plates 106. The threaded steel bar 107 is tightened to ensure a tight fit between the side plates 106 and the concrete base slab 101. A hanging beam system is installed on the steel casing 102. Hydraulic jack 112, with a high-strength bolt at its top, is activated by starting the oil pump, transferring the load from the support system to the suspension system. Temporary supports are removed, and the high-strength bolt on top of hydraulic jack 112 is adjusted to 2 / 3 of its maximum stroke. Hydraulic oil is then pumped into the cylinder of hydraulic jack 112. The piston rod in the cylinder moves upward under the pressure of the hydraulic oil, stopping when it reaches the high-strength bolt. The return valve in the cylinder returns the hydraulic oil to the oil tank. The threaded steel bar 107 moves downward with the piston rod, lowering the casing. This process is repeated until the casing reaches the design elevation. Sealing concrete is poured between the steel sleeve 103 and the steel casing 102. The connecting valve is opened to maintain internal and external water pressure balance. Once the sealing concrete reaches its design strength, the connecting valve is closed, and water is pumped out of the steel casing for the next step.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A steel-casing concrete base slab hoisting device, comprising a hoisting mechanism (1) and a supporting mechanism (2), characterized in that: The support mechanism (2) is located at the bottom of the lifting box mechanism (1); The hoisting mechanism (1) includes a splicing unit and a hanging unit. The splicing unit is connected to the top of the support mechanism (2), and the hanging unit is located above the splicing unit. The splicing unit consists of a concrete base plate (101), a steel casing (102), a steel sleeve (103), an L-shaped step (104), bolt holes (105), a side plate (106), and a precision-rolled threaded steel bar (107). The steel casing (102) is installed on the concrete base plate (101), the steel sleeve (103) is installed inside the steel casing (102), the L-shaped step (104) is fixedly connected to the perimeter of the concrete base plate (101), the bolt holes (105) are opened on the surface of the L-shaped step (104), the side plate (106) is installed on the top of the L-shaped step (104), and the precision-rolled threaded steel bar (107) penetrates the interior of the bolt holes (105). The suspension unit consists of a suspension beam (111) and a hydraulic jack (112). The suspension beam (111) is located on the top of the steel sleeve (103), and the hydraulic jack (112) is located on the top of the suspension beam (111). The support mechanism (2) consists of a bracket (201), a double-I-beam crossbeam (202), and a distribution beam (203). The bracket (201) is located below the lifting box mechanism (1), the double-I-beam crossbeam (202) is located on top of the bracket (201), and the distribution beam (203) is installed on top of the double-I-beam crossbeam (202).

2. The steel-casing concrete base caisson hoisting device according to claim 1, characterized in that: Waterstop strips are provided on the bottom and side walls of the L-shaped step (104), as well as between the side plates (106).

3. The steel-casing concrete base caisson hoisting device according to claim 2, characterized in that: The side plates (106) are connected by bolts.

4. The steel-casing concrete base caisson hoisting device according to claim 3, characterized in that: The concrete base slab (101) is prefabricated in a centralized manner, and the concrete base slabs (101) are connected by wet joints.

5. The steel-casing concrete base caisson hoisting device according to claim 4, characterized in that: The steel sleeve (103) is welded with a sealing plate and has a stiffening plate inside.

6. The steel-casing concrete base caisson hoisting device according to claim 5, characterized in that: The diameter of the steel sleeve (103) is 60 centimeters larger than that of the steel casing (102), and the length of the steel sleeve (103) is not less than 1.6 meters.

7. The steel-casing concrete base caisson hoisting device according to claim 6, characterized in that: The side plate (106) is provided with a water-passing device, and the device is located below the lowest water level.

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