CN219033262U

CN219033262U - Double-wall steel cofferdam top steel column foundation structure

Info

Publication number: CN219033262U
Application number: CN202223302257.1U
Authority: CN
Inventors: 唐善金; 张子煜; 李颖乐; 戴攀; 韩真平
Original assignee: Cccc Third Navigation Bureau Eighth Engineering Hunan Co ltd; CCCC Third Harbor Engineering Co Ltd
Current assignee: Cccc Third Navigation Bureau Eighth Engineering Hunan Co ltd; CCCC Third Harbor Engineering Co Ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-05-16
Anticipated expiration: 2032-12-06

Abstract

The utility model discloses a steel column foundation structure at the top of a double-wall steel cofferdam, which comprises a cofferdam wall plate, wherein a beam bottom steel plate is fixedly arranged at the upper end of the cofferdam wall plate, lower stress plates are fixedly arranged at the upper end of the beam bottom steel plate, the lower stress plates are symmetrically distributed at the upper end of the beam bottom steel plate left and right, an upper stress plate is fixedly arranged above the lower stress plates, a main stress beam is fixedly connected between the lower stress plate and the upper stress plate, and a steel column is fixedly arranged at the upper end of the main stress beam. This double-walled steel cofferdam top steel stand foundation structure, except utilizing the conventional stagnant water and the envelope function of steel cofferdam, still ingenious performance steel cofferdam vertical bearing capacity has avoided the peripheral a large amount of tubular pile construction of cofferdam, has directly reduced steel box girder support material and construction cost, easy dismounting, save time has promoted the work efficiency greatly, forms reliable connection between support system and the steel cofferdam simultaneously, guarantees support overall stability.

Description

Double-wall steel cofferdam top steel column foundation structure

Technical Field

The utility model relates to the technical field of bridge construction, in particular to a steel column foundation structure at the top of a double-wall steel cofferdam.

Background

At present, the steel box girder at the main tower of the large-span cable-stayed bridge is widely applied by adopting a bracket method, more bracket foundations are arranged on the top surface of a bearing platform, and when the bracket erection range of the steel box girder is wider, the bracket foundations arranged in the bearing platform range cannot meet the stress requirement of the bracket foundations;

the construction of the steel box girder support method under the traditional in-water wind rock geological condition needs to adopt large-scale equipment to carry out a large number of steel pipe pile foundation constructions, provides reverse supporting force for a support system, has high construction cost of a single rock-entering steel pipe pile and longer period, and in order to save cost and accelerate construction progress, the installed double-wall steel cofferdam is utilized to replace a part of the rock-entering steel pipe pile to serve as a support bearing foundation.

Disclosure of Invention

(one) solving the technical problems

The utility model aims to provide a steel column foundation structure at the top of a double-wall steel cofferdam, which aims to solve the problems of slow progress and high cost in the prior art when the bridge construction is performed.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a double-walled steel cofferdam top steel stand foundation structure, includes the cofferdam wallboard, the upper end fixed mounting of cofferdam wallboard has the beam bottom steel sheet, the upper end fixed mounting of beam bottom steel sheet has the atress board down, the upper end at beam bottom steel sheet of the bilateral symmetry distribution of atress board down, the top fixed mounting of atress board has the atress board down, fixedly connected with main atress roof beam between atress board and the last atress board down, the upper end fixed mounting of main atress roof beam has the steel stand.

Preferably, the stress inclined beam is fixedly connected between the lower stress plate and the upper stress plate, the stress inclined beam is symmetrically distributed between the lower stress plate and the upper stress plate front and back, the main stress beam and the stress inclined beam are in triangular distribution, the vertical bearing capacity of the steel cofferdam is skillfully exerted except for the conventional water stopping and enclosing functions of the steel cofferdam, a large number of tubular pile constructions around the cofferdam are avoided, the steel box girder support materials and construction cost are directly reduced, the disassembly and assembly are convenient, the time is saved, the work efficiency is greatly improved, meanwhile, the reliable connection is formed between the support system and the steel cofferdam, and the overall stability of the support is ensured.

Preferably, the local reinforcing plate is fixedly connected between the lower stress plate and the upper stress plate, the local reinforcing plate is symmetrically distributed between the lower stress plate and the upper stress plate front and back, the cross section of the local reinforcing plate is triangular, the local reinforcing plate is irregularly distributed on the side between the lower stress plate and the upper stress plate, and the support capacity of the structure can be improved in a targeted manner according to stress conditions at places with larger stress.

Preferably, the left end and the right end of the cofferdam wallboard are fixedly provided with the partition plates, the side of the beam bottom steel plate extends to the outer side of the cofferdam wallboard, a ribbed plate is fixedly connected between the beam bottom steel plate and the partition plates, and reinforcement can be formed between the beam bottom steel plate and the partition plates by installing the ribbed plate, so that the phenomenon of deflection of the partition plates caused by uneven local stress is avoided.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the double-wall steel cofferdam top steel column foundation structure, the conventional water stopping and enclosing functions of the steel cofferdam are utilized, the vertical bearing capacity of the steel cofferdam is exerted skillfully, a large number of tubular pile constructions around the cofferdam are avoided, the steel box girder support materials and construction cost are directly reduced, the disassembly and assembly are convenient, the time is saved, the work efficiency is greatly improved, meanwhile, the support system and the steel cofferdam are reliably connected, and the overall stability of the support is guaranteed;

2. according to the steel upright column foundation structure at the top of the double-wall steel cofferdam, local reinforcing plates are irregularly distributed on the side between the lower stress plate and the upper stress plate, and are supported at places with larger stress according to stress conditions, so that the supporting capacity of the structure can be pertinently improved;

3. according to the steel upright column foundation structure at the top of the double-wall steel cofferdam, reinforcement can be formed between the beam bottom steel plate and the partition plate through the installation of the ribbed plates, and the phenomenon that the partition plate deflects due to uneven local stress is avoided.

Drawings

FIG. 1 is a schematic perspective view of the present utility model;

FIG. 2 is a schematic diagram of the split structure of the upper stress plate of the present utility model;

FIG. 3 is a schematic view of the split structure of the rib plate of the present utility model;

fig. 4 is a schematic perspective view of a partial reinforcing plate according to the present utility model.

In the figure: 1. a cofferdam wall plate; 2. a beam bottom steel plate; 3. a lower stress plate; 4. an upper stress plate; 5. a primary load beam; 6. a steel upright; 7. a stressed oblique beam; 8. a local reinforcing plate; 9. a compartment plate; 10. rib plates; 11. reinforcing ribs.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution: the steel column foundation structure at the top of the double-wall steel cofferdam comprises a cofferdam wallboard 1, a beam bottom steel plate 2 is fixedly arranged at the upper end of the cofferdam wallboard 1, a lower stress plate 3 is fixedly arranged at the upper end of the beam bottom steel plate 2, the lower stress plate 3 is symmetrically distributed at the upper end of the beam bottom steel plate 2 left and right, an upper stress plate 4 is fixedly arranged above the lower stress plate 3, a main stress beam 5 is fixedly connected between the lower stress plate 3 and the upper stress plate 4, a steel column 6 is fixedly arranged at the upper end of the main stress beam 5, stress inclined beams 7 are fixedly connected between the lower stress plate 3 and the upper stress plate 4, the stress inclined beams 7 are symmetrically distributed between the lower stress plate 3 and the upper stress plate 4 front and back, the main stress beam 5 and the stress inclined beams 7 are distributed in a triangular shape, and the load of the steel column 6 is transferred to a partition plate 9 during supporting, the main stress beam 5 and the stress inclined beam 7 are arranged, so that the main stress beam 5 and the stress inclined beam 7 are used as stress supports through the lower stress plate 3 and the upper stress plate 4, the stable diffusion pressure is realized, the plate body is prevented from being broken due to overlarge pressure of the steel upright post 6, the triangular distribution structure can enable the whole support structure to be more stable and firm, the support effect is improved, the structure not only utilizes the conventional water stopping and enclosing functions of the steel cofferdam, but also skillfully exerts the vertical bearing capacity of the steel cofferdam, the construction of a large number of tubular piles around the cofferdam is avoided, the support materials and construction cost of the steel box beam are directly reduced, the disassembly and assembly are convenient, the time is saved, the work efficiency is greatly improved, meanwhile, the reliable connection is formed between a support system and the steel cofferdam, and the integral stability of the support is ensured;

the lower stress plate 3 and the upper stress plate 4 are fixedly connected with a local reinforcing plate 8, the local reinforcing plate 8 is symmetrically distributed between the lower stress plate 3 and the upper stress plate 4 front and back, the cross section of the local reinforcing plate 8 is triangular, the local reinforcing plate 8 is irregularly distributed on the side between the lower stress plate 3 and the upper stress plate 4, the support is carried out at a place with larger stress according to stress conditions, the support capacity of the structure can be pertinently improved, the partition plates 9 are fixedly arranged at the left end and the right end of the cofferdam wallboard 1, the side of the beam bottom steel plate 2 extends to the outer side of the cofferdam wallboard 1, a rib adding plate 10 is fixedly connected between the beam bottom steel plate 2 and the partition plates 9, and reinforcement can be formed between the beam bottom steel plate 2 and the partition plates 9 through the installation of the rib adding plate 10, so that the partition plates 9 are prevented from being inclined due to local uneven stress;

fixedly connected with strengthening rib 11 between steel stand 6 and the upper stress board 4, the strengthening rib 11 of installation can improve the connection stability between steel stand 6 and the upper stress board 4, avoids steel stand 6 to appear crooked and lead to serious atress skew, and strengthening rib 11 and steel stand 6 are integrated into one piece structure, and the structure of integration makes it more stable.

Working principle: when the steel upright post 6 is supported, the load is transferred to the partition plate 9, the main stress beam 5 and the stress inclined beam 7 are installed, the main stress beam 5 and the stress inclined beam 7 are used as stress supports through the lower stress plate 3 and the upper stress plate 4, the problem that the steel upright post 6 is broken due to overlarge pressure is avoided, the whole supporting structure is more stable and firm due to the triangular distribution structure, the supporting effect is improved, the vertical bearing capacity of the steel cofferdam is skillfully exerted besides the conventional water stopping and enclosing functions of the steel cofferdam, the tubular pile construction on the periphery of the cofferdam is avoided, the steel box girder support materials and the construction cost are directly reduced, the dismounting is convenient, the time is saved, the work efficiency is greatly improved, meanwhile, reliable connection is formed between a support system and the steel cofferdam, the overall stability of the support is ensured, the local reinforcing plate 8 is irregularly distributed on the side between the lower stress plate 3 and the upper stress plate 4, the supporting capacity of the structure can be pertinently improved according to the stress condition, and the phenomenon that the partition plate 9 is unevenly stressed is avoided due to the fact that the reinforcing rib plates 10 are arranged between the girder bottom steel plate 2 and the partition plate 9.

Finally, it should be noted that the above description is only for illustrating the technical solution of the present utility model, and not for limiting the scope of the present utility model, and that the simple modification and equivalent substitution of the technical solution of the present utility model can be made by those skilled in the art without departing from the spirit and scope of the technical solution of the present utility model.

Claims

1. The utility model provides a double-walled steel cofferdam top steel stand foundation structure, includes cofferdam wallboard (1), its characterized in that: the upper end fixed mounting of cofferdam wallboard (1) has beam bottom steel sheet (2), the upper end fixed mounting of beam bottom steel sheet (2) has atress board (3) down, the upper end at beam bottom steel sheet (2) of atress board (3) bilateral symmetry distributes down, the top fixed mounting of atress board (3) has atress board (4) down, fixedly connected with owner atress roof beam (5) between atress board (3) and the last atress board (4) down, the upper end fixed mounting of owner atress roof beam (5) has steel stand (6).

2. A double-walled steel cofferdam top steel column foundation structure as in claim 1, wherein: the novel lifting device is characterized in that a stress oblique beam (7) is fixedly connected between the lower stress plate (3) and the upper stress plate (4), the stress oblique beams (7) are symmetrically distributed between the lower stress plate (3) and the upper stress plate (4) front and back, and the main stress beam (5) and the stress oblique beams (7) are in triangular distribution.

3. A double-walled steel cofferdam top steel column foundation structure as in claim 2, wherein: the novel mechanical arm is characterized in that a local reinforcing plate (8) is fixedly connected between the lower stress plate (3) and the upper stress plate (4), the local reinforcing plates (8) are symmetrically distributed between the lower stress plate (3) and the upper stress plate (4) front and back, and the cross section of each local reinforcing plate (8) is triangular.

4. A double-walled steel cofferdam top steel column foundation structure as in claim 3, wherein: the cofferdam is characterized in that the partition plates (9) are fixedly arranged at the left end and the right end of the cofferdam wall plate (1), the side of the beam bottom steel plate (2) extends to the outer side of the cofferdam wall plate (1), and a ribbed plate (10) is fixedly connected between the beam bottom steel plate (2) and the partition plates (9).

5. A double-walled steel cofferdam top steel column foundation structure of claim 4, wherein: reinforcing ribs (11) are fixedly connected between the steel upright posts (6) and the upper stress plate (4).

6. A double-walled steel cofferdam top steel column foundation structure as in claim 5, wherein: the reinforcing ribs (11) and the steel upright posts (6) are of an integrated structure.