阅读说明：本技术 一种钢壳-混凝土组合结构 (Steel shell-concrete composite structure ) 是由 李永轩 刘玉擎 陈伟乐 宋神友 钟辉虹 刘健 金文良 张长亮 于 2020-07-20 设计创作，主要内容包括：本发明公开一种钢壳-混凝土组合结构,包括钢壳结构和钢壳结构内部填充的混凝土,钢壳结构由上面板、下面板、横向隔板和纵向隔板焊接而成,上面板纵向焊接型钢加劲肋,并在型钢加劲肋之间布置焊钉；下面板纵向焊接型钢加劲肋,横向焊接板肋；横向隔板为波折钢板,纵向隔板为平钢板,横向隔板与纵向隔板相互垂直；混凝土为自密实混凝土,通过上面板预留的浇筑孔进行混凝土浇筑,形成一个钢壳和混凝土组合结构单元,各个舱室连续布置形成钢壳与混凝土的组合结构。该钢壳-混凝土组合结构,结构设计合理、传力明确、经济安全、施工方便,且解决了现有钢壳混凝土组合结构横向抗剪刚度较低、横向隔板与混凝土组合效应弱、施工难度大的缺点。(The invention discloses a steel shell-concrete combined structure, which comprises a steel shell structure and concrete filled in the steel shell structure, wherein the steel shell structure is formed by welding an upper panel, a lower panel, a transverse partition plate and a longitudinal partition plate; the lower panel is longitudinally welded with the profile steel stiffening rib and transversely welded with the plate rib; the transverse partition plates are corrugated steel plates, the longitudinal partition plates are flat steel plates, and the transverse partition plates are perpendicular to the longitudinal partition plates; the concrete is self-compacting concrete, and the concrete is poured through the pouring holes reserved in the upper panel to form a steel shell and concrete combined structure unit, and all cabins are continuously arranged to form a combined structure of the steel shell and the concrete. The steel shell-concrete combined structure has the advantages of reasonable structural design, clear force transmission, economy, safety and convenience in construction, and overcomes the defects of low transverse shear rigidity, weak transverse partition plate and concrete combined effect and high construction difficulty of the conventional steel shell-concrete combined structure.)

1. A steel shell-concrete integrated configuration which characterized in that: the steel shell structure is formed by welding an upper panel, a lower panel, a transverse partition plate and a longitudinal partition plate, wherein profile steel stiffening ribs are longitudinally welded on the upper panel, and welding nails are arranged among the profile steel stiffening ribs; the lower panel is longitudinally welded with the profile steel stiffening rib and transversely welded with the plate rib; the transverse partition plates are corrugated steel plates, the longitudinal partition plates are flat steel plates, and the transverse partition plates are perpendicular to the longitudinal partition plates; the concrete is self-compacting concrete, the concrete is poured through the pouring holes reserved in the upper panel to form a steel shell and concrete combined structure unit, and all cabins are continuously arranged to form a combined structure of the steel shell and the concrete.

2. The steel shell-concrete composite structure according to claim 1, wherein: multichannel horizontal baffle horizontal parallel arrangement, and every horizontal baffle thickness is not less than 12 mm.

3. The steel shell-concrete composite structure according to claim 1, wherein: the transverse partition plate is not provided with or provided with a plurality of vertical stiffening ribs.

4. The steel shell-concrete composite structure according to claim 1, wherein: the transverse partition plate can adopt a 1000-type corrugated steel plate, a 1200-type corrugated steel plate, a 1600-type corrugated steel plate or a self-made corrugated steel plate.

5. The steel shell-concrete composite structure according to claim 1, wherein: the longitudinal partition plate is not provided with or provided with a plurality of vertical stiffening ribs.

6. The steel shell-concrete composite structure according to claim 1, wherein: the profile steel stiffening ribs longitudinally arranged on the upper panel and the lower panel are T-shaped steel or angle steel or flat-bulb steel or channel steel, and the height of each profile steel stiffening rib is 150-250 mm.

7. The steel shell-concrete composite structure according to claim 1, wherein: the diameter of the welding nail arranged on the upper panel is 16-22 mm, the length of the welding nail is 150-200 mm, the height of the welding nail is not more than that of the section steel stiffening rib on the upper panel, and the distance between every two adjacent welding nails is not more than 300 mm.

8. The steel shell-concrete composite structure according to claim 1, wherein: and a pouring hole and an air outlet hole are reserved in the top of the upper panel.

Technical Field

The invention relates to the technical field of tunnel structures, in particular to a steel shell-concrete combined structure.

Background

The steel shell-concrete combined structure is a combined structure consisting of a steel shell and concrete filled inside, and is applied to a top plate, a bottom plate, an outer wall and a middle wall of a submarine immersed tube tunnel with a rectangular cross section. The steel shell concrete structure with the traditional design is usually a circular section and is widely applied to a few lanes; and if adopt circular section to the multilane tunnel, its section diameter is too big, and the headroom is too high, and the utilization ratio is low to mostly be the tunnel that adopts the rectangle section. The rectangular section tunnel is usually mainly a reinforced concrete immersed tube tunnel, and is tested in the aspects of crack resistance, durability and other multiple problems. Compared with the prior art, the steel shell concrete immersed tube tunnel with the rectangular section can solve the problems of water resistance and earthquake resistance, improve the utilization rate of the section, improve the prefabrication level and ensure the construction precision, and is actively popularized and applied in domestic major projects in recent years.

Along with the increase of the section width, the span of the single-hole top plate is continuously increased, the transverse shearing force of the tunnel becomes a main influence factor of the structure safety, and the transverse partition plate also becomes a key structure of the structure. Because form the box hat structure earlier during the construction, later adopt self-compaction concrete to pour through the hole of pouring that the top panel was reserved, shear force that the dead weight load of bulky concrete produced in the cabin is transmitted by horizontal partition in the work progress. However, in the existing design, the transverse partition plate is often a flat steel plate, the shear rigidity of the transverse partition plate is weak, the structural deformation caused by construction load is large, the problem of downward deflection of a structural top plate is prominent, and the transverse partition plate becomes a main problem of structural construction quality and safety. Secondly, under the effect of long-term load, when the flat steel plate is used as a transverse partition plate, the restraint on concrete on two sides is small, the concrete in cabins on two sides can crack, and the transverse shear rigidity of the tunnel and the long-term performance of the structure are further influenced. In addition, when no concrete is poured, the vertical rigidity of the flat steel plate is insufficient, a plurality of vertical and transverse stiffening ribs need to be arranged to prevent local buckling, but the welding operation in the closed space is extremely difficult, and the buckling-preventing stiffening structure has no obvious effect after the concrete in the cabin is poured and formed to participate in stress, so that the problems that the rigidity of the transverse partition plate is improved, the combined action of the transverse partition plate and the concrete in the cabin is enhanced, and the welding construction operation for reducing the closed space is the problem that the steel shell-concrete combined structure sinking pipe is urgently needed to solve are solved.

Therefore, it is necessary to design a steel shell-concrete composite structure which can fully exert the function of the steel partition plate and improve the shear resistance of the structure, and is economical, safe and convenient to construct.

Disclosure of Invention

The invention aims to provide a steel shell-concrete combined structure with a transverse clapboard which is a corrugated steel plate, and the steel shell-concrete combined structure has the advantages of reasonable structural design, definite force transmission, economy, safety and convenient construction, thereby overcoming the defects of lower transverse shear rigidity, weak combined effect of the transverse clapboard and the concrete and high construction difficulty of the existing steel shell concrete.

In order to achieve the purpose, the invention provides the following scheme: the invention provides a steel shell-concrete combined structure, which comprises a steel shell structure and concrete filled in the steel shell structure, wherein the steel shell structure is formed by welding an upper panel, a lower panel, a transverse partition plate and a longitudinal partition plate; the lower panel is longitudinally welded with the profile steel stiffening rib and transversely welded with the plate rib; the transverse partition plates are corrugated steel plates, the longitudinal partition plates are flat steel plates, and the transverse partition plates are perpendicular to the longitudinal partition plates; the concrete is self-compacting concrete, the concrete is poured through the pouring holes reserved in the upper panel to form a steel shell and concrete combined structure unit, and all cabins are continuously arranged to form a combined structure of the steel shell and the concrete.

Preferably, a plurality of the transverse clapboards are transversely arranged in parallel, and the thickness of each transverse clapboard is not less than 12 mm.

Preferably, the transverse partition plate is not provided with or provided with a plurality of vertical stiffening ribs.

Preferably, the transverse partition plate can adopt 1000 type corrugated steel plates or 1200 type corrugated steel plates or 1600 type corrugated steel plates or self-made corrugations.

Preferably, the longitudinal partition plate is not provided with or provided with a plurality of vertical stiffening ribs.

Preferably, the profile steel stiffening ribs longitudinally arranged on the upper panel and the lower panel are T-shaped steel or angle steel or flat-bulb steel or channel steel, and the height of each profile steel stiffening rib is 150-250 mm.

Preferably, the diameter of the welding nail arranged on the upper panel is 16-22 mm, the length of the welding nail is 150-200 mm, the height of the welding nail is not more than that of the section steel stiffening rib on the upper panel, and the distance between every two adjacent welding nails is not more than 300 mm.

Preferably, a pouring hole and an air outlet hole are reserved in the top of the upper panel.

Compared with the prior art, the invention has the following beneficial technical effects:

the steel shell-concrete combined structure can replace the conventional flat steel plate by the corrugated steel plate, improves the shear rigidity of the steel shell structure, enhances the restraint of the transverse partition plate and the concrete in the cabins at two sides, reduces the vertical stiffening construction difficulty of the transverse partition plate, and is favorable for solving the problem of overlarge downward deflection of the top plate of the immersed tube tunnel in the pouring construction process and the like. Meanwhile, the self-compacting concrete is in three constraint states, and compared with a flat steel plate, the corrugated steel plate has stronger constraint performance on the concrete on two sides of the diaphragm plate, so that the concrete has higher shear strength, and the shear performance in the normal use stage is improved. In addition, compared with a flat steel plate, the corrugated web plate can obviously improve the out-of-plane rigidity of the transverse partition plate and reduce the deformation of a panel caused by concrete pouring. The structure atress is reasonable, mechanical properties is good, can be applicable to the tunnel structure that horizontal atress is complicated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a main body of a steel shell-concrete composite structure in which a transverse partition plate is a corrugated steel plate in an embodiment of the invention.

Fig. 2 is a schematic structural view of a transverse corrugated partition and a longitudinal partition in an embodiment of the present invention.

Fig. 3 is a schematic structural view of a lower panel in the embodiment of the present invention.

Fig. 4 is a schematic structural view of the upper panel in the embodiment of the present invention.

Reference numerals:

a-tunnel transverse, 1-concrete, 2-upper panel, 3-lower panel, 4-transverse corrugated partition, 5-longitudinal partition, 6-vertical stiffening rib, 7-vertical stiffening rib, 8-transverse plate rib, 9-longitudinal profile steel stiffening rib, 10-longitudinal profile steel stiffening rib, 11-welding nail, 12-pouring hole and 13-air outlet hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a steel shell-concrete combined structure with a transverse clapboard which is a corrugated steel plate, and the steel shell-concrete combined structure has the advantages of reasonable structural design, definite force transmission, economy, safety and convenient construction, thereby overcoming the defects of lower transverse shear rigidity, weak combined effect of the transverse clapboard and the concrete and high construction difficulty of the existing steel shell concrete.

The invention provides a steel shell-concrete combined structure, which comprises a steel shell structure and concrete filled in the steel shell structure, wherein the steel shell structure is formed by welding an upper panel, a lower panel, a transverse partition plate and a longitudinal partition plate; the lower panel is longitudinally welded with the profile steel stiffening rib and transversely welded with the plate rib; the transverse partition plates are corrugated steel plates, the longitudinal partition plates are flat steel plates, and the transverse partition plates are perpendicular to the longitudinal partition plates; the concrete is self-compacting concrete, and the concrete is poured through the pouring holes reserved in the upper panel to form a steel shell and concrete combined structure unit, and all cabins are continuously arranged to form a combined structure of the steel shell and the concrete.

The top panel, the bottom panel, horizontal separators and longitudinal baffle welding form the box hat structure, concreting forms this integrated configuration in the cabin of box hat structure, and this structure utilizes the ripples steel sheet to replace conventional flat steel sheet, has improved the rigidity of shearing of box hat structure, has strengthened the restraint of horizontal separators and both sides in-cabin concrete, has reduced horizontal separators's the vertical construction degree of difficulty of putting more energy into, is favorable to solving the too big problem of downwarping of in-process immersed tube tunnel roof such as pouring construction.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1-4, the present embodiment provides a steel shell-concrete composite structure, which includes a steel shell structure and concrete 1 filled in the steel shell structure, wherein the steel shell is formed by welding an upper panel 2, a lower panel 3, a plurality of transverse corrugated partitions 4, and a plurality of longitudinal partitions 5 to form a closed cabin.

As shown in fig. 2, the transverse corrugated partition 4 may or may not be provided with vertical stiffening ribs 6, and the arrangement, number and spacing of the stiffening ribs may be determined according to actual conditions; the longitudinal partition plates 5 are flat steel plates, vertical stiffening ribs 7 are often required to be arranged, and the arrangement, the number and the spacing of the stiffening ribs can be determined according to actual conditions.

Referring to fig. 1 and 2, the plurality of transverse corrugated partition plates 4 are parallel to each other, the plurality of longitudinal partition plates 5 are parallel to each other, the transverse corrugated partition plates 4 are perpendicular to the longitudinal partition plates 5, and when the transverse corrugated partition plates 4 are arranged in a staggered manner, the continuity of the transverse corrugated partition plates 4 is preferably ensured. The transverse corrugated partition plates 4 are connected by butt welding at variable thickness positions, and the positions of the butt welding are far away from the welding areas connected with the longitudinal partition plates 5 to prevent stress concentration. The position of the variable thickness is preferably arranged in the center of the steel shell cabin.

As shown in fig. 3, the lower panel 3 is provided with a transverse plate rib 8 and a longitudinal steel stiffening rib 9, the height of the transverse plate rib 8 is lower than that of the longitudinal steel stiffening rib 9, the transverse plate rib 8 can be a plate rib or a flat bulb steel, the longitudinal steel stiffening rib 9 can be a T-shaped steel, an angle steel, a flat bulb steel or a channel steel, the height is 150-250 mm, and the height can be determined according to actual conditions. In order to ensure the continuity of the transverse plate ribs 8, the longitudinal section steel stiffening ribs 9 are provided with holes at corresponding positions.

As figure 4, the top panel 2 sets up vertical shaped steel stiffening rib 10 to set up between the connecting piece and weld the nail connecting piece, vertical shaped steel stiffening rib 10 can be T shaped steel, angle steel, bulb steel or channel-section steel, and height 150 ~ 250mm can be confirmed according to actual conditions, and the diameter of welding nail 11 is 16 ~ 22mm, and length is 150 ~ 200mm and does not exceed vertical shaped steel stiffening rib 10 height, welds nail 11 interval and does not exceed 300mm, is located between the vertical shaped steel stiffening rib 10.

After the welding of the lower panel 3 and the upper panel 2 and the auxiliary connecting structures thereof as shown in fig. 1, 3 and 4 is completed, a plurality of transverse corrugated partition plates 4 are arranged in parallel transversely, and a plurality of longitudinal partition plates 5 are arranged in parallel longitudinally, wherein the positions of the corrugated steel plates and the longitudinal partition plates 5 are indicated by dotted lines in fig. 3 and 4.

As shown in fig. 1 and 4, a pouring hole 12 and an air outlet hole 13 are reserved on the upper panel 2 to ensure that internal air is exhausted during pouring and pouring of concrete. And (3) pouring concrete 1 after the closed steel shell is formed, and pouring self-compacting concrete with fine aggregate and good fluidity, wherein the slump of the self-compacting concrete is required to be not less than 500 mm. Through the pouring hole 12 of the upper panel and exhausts the gas in the steel shell cabin through the gas outlet hole 13. When the concrete 1 is poured, the concrete 1 emerges from the air outlet 13 to ensure the compactness of the concrete 1, so that a steel shell-concrete combined structural unit is formed. The corresponding units are continuously arranged in the transverse direction and the longitudinal direction to form the structures of a top plate, a bottom plate, a middle wall, an outer wall and the like of the steel shell-concrete combined structure immersed tube.

In another embodiment, preferably, the transverse corrugated partition plate 4 is a corrugated steel plate, the connection between the plate members is performed by double-sided welding, and the thickness of the corrugated steel plate is not less than 12 mm. The transverse corrugated partition plate 4 can adopt 1000 type, 1200 type or 1600 type corrugated steel plates commonly used for bridge structures, or adopts self-made corrugated plates, but the whole or local buckling of the web plate before shearing yielding is ensured. The transverse corrugated partition plate 4 is not provided with or provided with a plurality of vertical stiffening ribs or connecting pieces such as welding nails, and the stiffening ribs can be plate ribs or flat-bulb steel. The longitudinal partition 5 is not provided with or provided with a plurality of vertical stiffening ribs, and the stiffening ribs can be plate ribs or flat-bulb steel.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.