CN212452773U

CN212452773U - Inner support mounting device for steel sheet pile cofferdam reverse construction

Info

Publication number: CN212452773U
Application number: CN202020520773.3U
Authority: CN
Inventors: 谢桂锋; 王翔
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2021-02-02
Anticipated expiration: 2030-04-10

Abstract

The utility model discloses an interior support installation device of steel sheet pile cofferdam reverse construction, it includes steel platform, bailey roof beam, suspends interior braced system etc. in midair, and it utilizes steel platform as supporting component, sets up to suspend in midair that the interior braced system is internal to be supported and sinks, has both reduced construction risk and cost, and the straightness and the plane position of hanging down of putting in steerable interior support again effectively guarantees inserting of steel sheet pile and beats the quality.

Description

Inner support mounting device for steel sheet pile cofferdam reverse construction

Technical Field

The utility model relates to a bridge construction technical field specifically is an interior support installation device in steel sheet pile cofferdam construction.

Background

When a structure needs to be constructed in water, such as bridge pier column construction, reservoir construction and the like, cofferdam construction is generally adopted, and a steel sheet pile cofferdam is the most common form of a sheet pile cofferdam, is suitable for deep water and hard riverbeds such as sandy soil, cohesive soil, gravel soil, strongly weathered rock and the like with high flow speed, has the characteristics of good waterproof performance and high overall rigidity, and is widely used compared with other deep water cofferdams and has good economical efficiency.

At present, the steel sheet pile cofferdam is constructed by a forward construction method and a reverse construction method. The reverse construction method is that the inner support is installed through the hoisting device, and then the steel sheet pile is driven, and the reverse construction method is just opposite. When the depth of water of the cofferdam is larger (more than 15 meters), the construction by adopting the reverse construction method can effectively avoid the problems that the steel sheet pile deforms too much and even trips and the like because the steel sheet pile bears the water pressure firstly during the construction by the forward construction method, and the safety accidents are reduced.

In the top-down construction of the steel sheet pile cofferdam, an inner support mounting device is needed to be implemented in order to meet the requirements of mounting and temporarily fixing the inner support before a steel sheet pile is not driven.

Disclosure of Invention

The utility model aims at the above-mentioned technical problem, provide an interior support installation device in steel sheet pile cofferdam reverse construction method construction.

In order to achieve the above object, the present invention provides the following technical solutions: an inner support installation device for reverse construction of a steel sheet pile cofferdam comprises a steel platform, a Bailey beam, a suspension inner support system and the like. The steel platform is a construction operation platform, the first I-steel and the second I-steel are vertically arranged, the lower ends of the first I-steel and the second I-steel are respectively arranged at the upper parts of two ends of the steel platform along the water flow direction, the Bailey beam is arranged at the upper ends of the first I-steel and the second I-steel in a crossing manner, the suspension inner support system is used for suspending an inner support of a cofferdam and comprises a third I-steel and a fourth I-steel which are respectively and vertically welded at the upper parts of two ends of the Bailey beam, the upper parts of the third I-steel and the fourth I-steel are respectively and horizontally welded with a fifth I-steel and a sixth I-steel, a first hydraulic jack and a second hydraulic jack are respectively erected on the fifth I-steel and the sixth I-steel, a seventh I-steel and an eighth I-steel are respectively and horizontally arranged above the first hydraulic jack, the fifth I-steel, the sixth I-steel, the seventh I-steel and the eighth I-steel are horizontally arranged, the four finish rolling threaded steel bar raising ropes penetrate through the upper and lower corresponding limit nuts of the finish rolling threaded steel bar hanging rod.

Furthermore, two pieces of the Bailey beams form a group, and a group of Bailey beams is erected on the first I-beam and the second I-beam; furthermore, a plurality of groups of first I-beams and second I-beams and corresponding Bailey beam groups are arranged on the steel platform and are perpendicular to the water flow direction; furthermore, two ends of the upper part of the steel platform along the water flow direction are respectively welded with an I-shaped steel as a support; furthermore, the inner support cantilever beam is lifted up by fixedly arranging the finish rolling threaded steel bar cantilever rope and two groups of finish rolling threaded steel bar suspender limit nuts arranged at two ends of the inner support cantilever beam.

The utility model has the advantages that:

1) the steel platform is used as a supporting member and is used as a processing and positioning platform for the inner support, so that the problems of an inner support processing field and large-scale hoisting equipment are solved, the construction risk and cost are reduced, and the positioning in the inner support sinking process is accurate and simple.

2) The steel platform is used as a supporting member, the suspension inner support system is arranged to sink the inner support, so that the construction risk and cost are reduced, the verticality and the plane position of the inner support sinking can be controlled, and the inserting and driving quality of the steel sheet pile is effectively guaranteed.

3) The utility model is suitable for a riverbed construction environment of deep water (the depth of water exceeds 15 meters), compare with other installation device, its material is general, has advantages such as the installation is high-efficient, construction safety to the personnel and the equipment that installation device operation drops into are less, have reduced construction cost to a certain extent, have extensive practicality and spreading value.

Description of the drawings:

fig. 1 is a schematic view of an installation plane of the present invention.

Fig. 2 is a schematic view of an installation elevation of the present invention.

1, a steel platform; 2 beret beam; 3 suspending the internal bracing system; 4, finely binding a threaded steel bar suspender limit nut; 5, finish rolling the twisted steel lifting rope; 11 a first i-beam; 12 second i-steel; 13 third i-steel; 14 fourth I-shaped steel; 15 fifth i-steel; 16 sixth i-steel; 17 seventh i-steel; 18 eighth i-steel; 21 a first hydraulic jack; 22 second hydraulic jack

Detailed Description

The present invention will be further specifically described with reference to the accompanying drawings.

An inner support installation device for reverse construction of a steel sheet pile cofferdam comprises a steel platform 1, a Bailey beam 2, a suspension inner support system 3 and the like. The steel platform is a construction operation platform, the first I-beam 11 and the second I-beam 12 are arranged vertically, the lower ends of the first I-beam 11 and the second I-beam 12 are respectively arranged at the upper parts of two ends of the steel platform along the water flow direction, the Bailey beam 2 stretches over the upper ends 12 of the first I-beam 11 and the second I-beam, the suspension inner support system 3 is used for suspending an inner support of a cofferdam and comprises a third I-beam 13 and a fourth I-beam 14 which are respectively welded at the upper parts of two ends of the Bailey beam 2 vertically, the upper parts of the third I-beam 13 and the fourth I-beam 14 are respectively welded with a fifth I-beam 15 and a sixth I-beam 16 horizontally, a first hydraulic jack 21 and a second hydraulic jack 22 are respectively erected on the fifth I-beam 15 and the sixth I-beam 16, a seventh I-beam 17 and an eighth I-beam 18 are respectively horizontally arranged above the first hydraulic jack 21 and the second hydraulic jack 22, and a fifth, a sixth, a seventh, And two groups of finish-rolled threaded steel bar suspender limit nuts 4 are respectively arranged at the upper part of the eighth I-shaped steel, and four finish-rolled threaded steel bar lifting ropes 5 penetrate through the corresponding upper and lower finish-rolled threaded steel bar suspender limit nuts and are fixedly connected with the nuts.

Furthermore, two pieces of the Bailey beam 2 form a group, and a group of Bailey beams 2 are erected on the first I-beam 11 and the second I-beam 12; furthermore, a plurality of groups of first I-beams 11 and second I-beams 13 and corresponding Bailey beam groups are arranged on the steel platform 1 and are perpendicular to the water flow direction; furthermore, two ends of the upper part of the steel platform 1 along the water flow direction are respectively welded with an I-shaped steel as a support.

The utility model discloses a use as follows:

1) and assembling the purlin enclosing system. Fixing purlins on a steel platform in layers (within the range of a cofferdam) and welding and assembling; after the enclosing purlin is installed, the supporting beams and the inner diagonal bracing beams are installed, and the inner diagonal bracing beams and the enclosing purlin are fixed by full welding; and in combination with the engineering working condition, the cross braces or the vertical ribs between the inner braces can be optionally increased. By adopting the same method, after the Nth internal bracing system is processed and spliced, a steel pipe with enough rigidity is inserted and driven into the inner sides of four corners of the Nth internal bracing system respectively to serve as positioning piles of the sinking internal bracing, so that the influence of the swing of a suspender on the stability of the suspension system caused by the impact of water flow and wind load on steel sheet piles which are not inserted and driven in the sinking water by the internal bracing is avoided.

2) After the assembly of the purlin system is completed, the finish rolling twisted steel lifting rope of the internal support mounting device is fixedly connected with the assembled purlin system, the mounted purlin system is synchronously transferred by utilizing the first jack and the second jack, after each layer is transferred, a second layer internal support frame is mounted on the water surface, and the second layer internal support frame sinks continuously after the mounting is completed until all internal support frames are completed; if the fine-binding thread lifting rope is not long enough in the lowering process, the length needs to be lengthened, and the specific method comprises the following steps: and keeping other suspension systems still, and lengthening the finish-rolled deformed steel bars of each suspension system one by one through the connector until all the suspension systems finish-rolled deformed steel bars are lengthened.

3) And after the inner support is sunk to the designed elevation by using the suspension system, a closed and firm inner support frame is finally formed. And then inserting and driving the steel sheet piles until all the inserting and driving work of the steel sheet piles is completed.

Claims

1. The utility model provides an interior support installation device of steel sheet pile cofferdam reverse construction which characterized in that: the steel platform is a construction operation platform, the first I-beam and the second I-beam are vertically arranged, the lower ends of the first I-beam and the second I-beam are respectively arranged at the upper parts of two ends of the steel platform along the water flow direction, the Bailey beam is arranged at the upper ends of the first I-beam and the second I-beam in a crossing manner, the suspension inner support system is used for suspending an inner support of a cofferdam and comprises a third I-beam and a fourth I-beam which are respectively vertically welded at the upper parts of two ends of the Bailey beam, the upper parts of the third I-beam and the fourth I-beam are respectively horizontally welded with a fifth I-beam and a sixth I-beam, a first hydraulic jack and a second hydraulic jack are respectively erected on the fifth I-beam and the sixth I-beam, a seventh I-beam and an eighth I-beam are respectively horizontally arranged above the first hydraulic jack and the second hydraulic jack, and the upper parts of the fifth, sixth, seventh and seventeenth I-beams which are horizontally arranged are respectively provided with two groups of finish-rolled threaded steel bar suspender limit nuts, and four finish-rolled threaded steel bar cantilever ropes penetrate through the corresponding finish-rolled threaded steel bar suspender limit nuts from top to bottom.

2. The internal support installation device for reverse construction of a steel sheet pile cofferdam of claim 1, wherein two pieces of the bailey beams form a group, and a group of bailey beams is erected on the first i-beam and the second i-beam.

3. The internal support installation device for reverse construction of a steel sheet pile cofferdam of claim 1, wherein a plurality of groups of first I-shaped steel and second I-shaped steel and corresponding Bailey beam groups are arranged on the steel platform perpendicular to the water flow direction.

4. The internal support installation device for reverse construction of a steel sheet pile cofferdam as claimed in claim 1, wherein two ends of the upper part of the steel platform along the water flow direction are respectively welded with an I-shaped steel as a support.

5. The inner support mounting device for reverse construction of a steel sheet pile cofferdam as claimed in claim 1, wherein the inner support outrigger is raised by fixedly arranging the finish-rolled threaded steel bar outrigger and two sets of finish-rolled threaded steel bar suspender limit nuts arranged at both ends of the outrigger of the inner support.