CN210482368U - Assembled flat-top large-span pillar-free underground structure - Google Patents

Abstract

The utility model belongs to the field of underground engineering construction, and relates to an assembled flat-top large-span pillar-free underground structure, which comprises an enclosure structure, a flat-top plate, a first plate and a first side wall prefabricated part, wherein the enclosure structure is internally provided with the flat-top plate and the first plate, two sides on the first plate are respectively provided with a first side wall, two ends of the flat-top plate are respectively arranged on two first side walls at two sides, the first side wall comprises the first side wall prefabricated part, the first side wall prefabricated part comprises a vertical section, a horizontal section and an inclined support section, the bottom of the vertical section is connected with the first plate, the top of the vertical section is connected with one end of the horizontal section, and the other end of the horizontal section is connected with one end of the inclined support section; the other end of the inclined support section is connected with the vertical section. The utility model discloses a first side wall prefab of tripod shape supports flat-topped slab, realizes that the flat top does not have the post, has better realized building vision does not have the big space effect of post, and the foundation ditch buries the depth and increases less, and does not have the hunch foot and expand thrust outward, has improved the stability of structure.

Description

Assembled flat-top large-span pillar-free underground structure

Technical Field

The utility model belongs to the technical field of underground works builds, concretely relates to assembled flat top stride no post underground structure greatly.

Background

The existing open cut method for constructing an underground structure with an inner support foundation pit adopts the traditional construction technology of a cast-in-place reinforced concrete structure, the design process is complex, and the workload is large; in the field construction process, a large amount of labor force of multiple types is needed, the construction operation environment is poor, the construction process is complex, the construction speed is low, the influence of various weather and climate is great, and the construction quality is difficult to ensure. Meanwhile, a lot of waste construction waste is generated in the construction process, so that resources are wasted and the environment is polluted. The cast-in-place concrete structure construction management and control is uneven, various quality defects often appear in the appearance or the interior of the concrete structure due to various reasons after construction is completed, the later-stage repair difficulty is high, and the quality is difficult to guarantee.

With the progress of science and technology, the development of equipment manufacturing industry and the upgrading and transformation of industry, more and more work is carried out by replacing manpower with machines, and high technology replaces labor-intensive type and automatic control equipment replaces manual control. Various components (beams, plates, columns, walls) required in the field of building engineering will be gradually produced in batches in factories and then transported to the site for assembly.

With the development of the assembly type technology, partial assembly type design and construction technical schemes are developed in the underground structure, and some underground structures are only suitable for open excavation foundation pits with less underground water and adopting slope release or anchor cables (rods) and are not suitable for areas with inner supports and abundant underground water in the foundation pits; some parts only adopt the assembled structure, and the assembly degree is not high, and the assembly efficiency is low. The existing scheme aims at the conventional underground structure with columns, and the view of the underground space is not wide; the existing scheme of the pillarless underground structure is mostly a vault, the external thrust is large, the increase of the buried depth of the foundation pit is large, the manufacturing cost is high, the soil body outside the foundation pit is strictly forbidden to be unloaded, and the requirement on the management and control of the surrounding environment after operation is high.

Disclosure of Invention

In order to overcome the not enough of above-mentioned prior art existence, the utility model aims at providing a no post underground structure is striden greatly to assembled flat top can effectively solve underground assembled structure waterproof problem and structural integrity problem, has better realized the big space effect of building vision no post, and the foundation ditch buries the depth and increases less, and does not have the outer thrust that expands of hunch foot, has improved the stability of structure.

In order to achieve the purpose, the technical scheme of the utility model is that an assembled flat top large span no-column underground structure, including enclosure, flat top plate, first plywood and first side wall prefab, be equipped with flat top plate and first plywood in the enclosure, both sides on the first plywood all are equipped with first side wall, the both ends of flat top plate set up respectively on two first side walls of both sides, the first side wall includes first side wall prefab, the first side wall prefab includes vertical section, horizontal segment and bearing diagonal section, the bottom of vertical section is connected with the first plywood, the top of vertical section is connected with one end of horizontal segment, the other end of horizontal segment is connected with one end of bearing diagonal section; and the other end of the inclined support section is connected with the vertical section.

Furthermore, the inclined support section comprises a horizontal part and an inclined support part, one end of the inclined support part is connected with the vertical section, and the other end of the inclined support part and the other end of the horizontal section are connected with one end of the horizontal part.

As an embodiment, the vertical section, the horizontal section and the diagonal bracing section are integrally prefabricated and molded; as another embodiment, the vertical section, the horizontal section and the diagonal bracing section are prefabricated separately, and the first side wall prefabricated member is formed by assembling.

In one embodiment, a first side wall cast-in-place layer is poured between the first side wall prefabricated member and the building envelope and between the first side wall prefabricated member and the first floor slab.

In another embodiment, a cast-in-place first side wall connecting section is poured between the first side wall prefabricated member and the first floor slab.

Furthermore, the flat top slab comprises a flat top slab prefabricated member and a flat top slab cast-in-place layer, two ends of the flat top slab prefabricated member are respectively arranged on the two first side wall prefabricated members on two sides, and the flat top slab cast-in-place layer is poured on the top of the first side wall prefabricated member, the top of the first side wall cast-in-place layer and the flat top slab prefabricated member.

Furthermore, a second layer plate is arranged below the first layer plate, second side walls are arranged on two sides of the second layer plate, and two ends of the first layer plate are arranged on the two second side walls on the two sides respectively.

In one embodiment, the second side wall comprises a second side wall prefabricated member, and a second side wall cast-in-place layer is poured between the second side wall prefabricated member and the building envelope and between the second side wall prefabricated member and the second laminate.

In another embodiment, the second side wall comprises a second side wall prefabricated member, and a second side wall cast-in-place connecting section is poured between the bottom of the second side wall prefabricated member and the second laminate.

Furthermore, a middle upright post is arranged on the second layer plate, a middle longitudinal beam is arranged on the middle upright post, and the middle part of the first layer plate is arranged on the middle longitudinal beam.

In one embodiment, the first floor comprises a first floor cast-in-place layer and two first floor prefabricated members, one end of each first floor prefabricated member is arranged on the middle longitudinal beam, the other end of each first floor prefabricated member is arranged on the second side wall, and the first floor cast-in-place layer is poured on the top of the second side wall, the top of the middle longitudinal beam and the first floor prefabricated members.

In another embodiment, the first floor comprises two first floor prefabricated parts, one end of each first floor prefabricated part is arranged on the second side wall, the other end of each first floor prefabricated part is arranged on the middle longitudinal beam, and a first floor cast-in-place connecting section is poured between the two first floor prefabricated parts.

Furthermore, a concrete cushion is arranged below the second layer plate, and a waterproof layer is constructed between the second layer plate and the concrete cushion.

In one embodiment, the second slab is a reinforced concrete cast-in-place layer.

As another embodiment, the second layer plate comprises two second layer plate-side prefabricated members and a second layer plate-side prefabricated member arranged between the two second layer plate-side prefabricated members, and a second layer plate cast-in-place connecting section is cast between the second layer plate-side prefabricated member and the second layer plate-side prefabricated member.

Furthermore, a first groove is formed in one side, away from the enclosure structure, of the second layer plate side prefabricated member, a second groove is formed in one side, opposite to the first groove, of the second layer plate middle prefabricated member, and the second layer plate cast-in-place connecting section is located between the first groove and the second groove.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the assembled flat-top large-span pillar-free underground structure provided by the utility model supports the flat-top slab through the triangular frame-shaped first side wall prefabricated member, so that the flat-top pillar-free structure realizes the flat-top pillar-free structure, better realizes the large space effect of building vision pillar-free structure, increases less foundation pit buried depth, has no arch foot outward expansion thrust, and improves the stability of the structure;

(2) the utility model provides an inclined support section, a vertical section and a horizontal section of a first side wall prefabricated part of an assembled flat-top large-span pillarless underground structure are enclosed to form a tripod structure, and the space in the tripod structure can be reasonably used for pipeline arrangement and the like;

(3) the utility model provides a no post underground structure application scope is wide for assembled flat top stride greatly, forms superimposed structure through prefab and cast-in-place layer, can remove partial on-the-spot formwork from, erect interim facilities such as scaffold frame, save the time limit for a project to can improve assembled underground structure's waterproof performance and whole atress performance effectively.

(4) The assembled flat-top large-span pillarless underground structure provided by the utility model adopts a reasonable component partitioning scheme, so that the size and the weight of a single prefabricated component can be reduced, the size and the weight of the prefabricated component can meet the requirements of on-site hoisting and splicing of a supporting foundation pit, the transportation of the prefabricated component is convenient, and the industrialized popularization and application can be better realized;

(5) the utility model provides a cast-in-place 'wet node' is adopted at the joint of the side wall prefabricated member and the laminate prefabricated member, the joint between the laminate prefabricated members and the joint of the laminate prefabricated member and the middle longitudinal beam of the fabricated flat-top large-span pillarless underground structure, and the fabricated underground structure has good waterproofness and integrity;

(6) the utility model provides an assembled flat top stride no post underground structure greatly has prefab size standardization, reduces design work load, improves production efficiency, promotes building quality, can better realize the industrialization, saves the labour, saves template and scaffold frame etc. advantages such as reduction of erection time, energy-conservation, environmental protection.

Drawings

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

Fig. 1 is a schematic structural diagram of an assembled flat-top large-span pillarless underground structure according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an assembled flat-top large-span pillarless underground structure according to a first embodiment of the present invention;

fig. 3 is a schematic structural view of a first side wall prefabricated member of an assembled flat-top large-span pillarless underground structure according to an embodiment of the present invention;

fig. 4 is a schematic view of a connection structure between a first slab cast-in-place layer and a first side wall prefabricated member according to a second embodiment of the present invention;

fig. 5 is a schematic partial structural view of a cast-in-place layer of a first floor provided in the second embodiment of the present invention;

fig. 6 is a schematic partial structural view of a first side wall prefabricated component according to a second embodiment of the present invention;

fig. 7 is a schematic view of a connection structure of two first floor preforms according to a third embodiment of the present invention;

fig. 8 is a top view of a connection structure of two first floor preforms according to a third embodiment of the present invention;

fig. 9 is a schematic partial structural view of a first floor preform according to a third embodiment of the present invention;

fig. 10 is a schematic partial structural view of a first floor preform according to a third embodiment of the present invention;

in the figure: 1. the building envelope comprises a building envelope, 2, a crown beam, 4, a concrete cushion, 5, a reinforced concrete cast-in-place layer, 6, a middle upright post, 7, a middle longitudinal beam, 8, a second side wall prefabricated part, 9, a second side wall cast-in-place layer, 10, a first floor prefabricated part, 11, a first floor cast-in-place layer, 12, a first side wall prefabricated part, 13, a vertical section, 14, a horizontal section, 15, an inclined support section, 151, a horizontal part, 152, an inclined support part, 16, a first side wall cast-in-place layer, 17, a flat top floor prefabricated part, 18, a flat top floor cast-in-place layer, 19, backfill soil, 20, a first U-shaped rib, 21, a first positioning member, 22, a second U-shaped rib, 23, a second positioning member, 24, a first transverse reinforcing steel bar, 25, a second transverse reinforcing steel bar, 26, an upper main reinforcing steel bar, 27, an additional transverse reinforcing steel bar, 28, a connecting rib, 29, a first vertical tie rib frame, a second tie rib frame, 31, The water stopping structure comprises 32 parts of upper longitudinal steel bars, 33 parts of lower longitudinal steel bars, 34 parts of lower main steel bars, 35 parts of additional longitudinal steel bars; 36. the cast-in-place construction method comprises the following steps of a second layer plate side prefabricated part, a second layer plate middle prefabricated part, 38, a second layer plate cast-in-place connecting section, 39, a middle upright post cast-in-place connecting section, 40, a second side wall cast-in-place connecting section and 41, and a first layer plate cast-in-place connecting section.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Example one

As shown in fig. 1-2, the present embodiment provides an assembled flat-topped large-span pillarless underground structure, which includes two enclosures 1, a flat-topped slab, a first slab and a first side wall prefabricated part 12, wherein the flat-topped slab and the first slab are disposed between the two enclosures 1, both sides of the first slab are provided with first side walls, and both ends of the flat-topped slab are disposed on the two first side walls on both sides, respectively; the first side wall comprises a first side wall prefabricated part 12, the first side wall prefabricated part 12 comprises a vertical section 13, a horizontal section 14 and an inclined support section 15, the bottom of the vertical section 13 is connected with the first floor, the top of the vertical section 13 is connected with one end of the horizontal section 14, and the other end of the horizontal section 14 is connected with one end of the inclined support section 15; the other end of the diagonal bracing section 15 is connected with the vertical section 13. This embodiment supports flat top floor through the first side wall prefab 12 of triangle-shaped structure, realizes that the flat top does not have the post, has better realized building vision does not have the big space effect of post, and the foundation ditch buried depth increases less, and does not have the hunch foot and expands thrust outward, has improved the stability of structure.

Further, as shown in fig. 3, the inclined strut section 15 includes a horizontal portion 151 and an inclined strut portion 152, one end of the inclined strut portion 152 is connected to the vertical section 13, and the other end of the inclined strut portion 152 and the other end of the horizontal section 14 are both connected to one end of the horizontal portion 151. The diagonal bracing section 15 of the present embodiment is provided with a horizontal part, so that the horizontal section 14 and the diagonal bracing section 15 are assembled; in addition, the horizontal portion 151 of this embodiment is provided with a step at the end away from the end connected to the horizontal section 14, so as to facilitate assembly with the flat top deck preform 17.

As an embodiment, as shown in fig. 1, the vertical section 13, the horizontal section 14 and the diagonal bracing section 15 are integrally prefabricated and formed, so that the field assembly process is reduced, the assembly efficiency is improved, and the construction period is shortened; as another embodiment, as shown in fig. 3, the vertical section 13, the horizontal section 14 and the diagonal bracing section 15 are prefabricated separately, and are assembled into the first side wall prefabricated member 12 in a triangular frame shape after being hoisted to a construction site according to fig. 3, so that the size and weight of the prefabricated member can be reduced, and the transportation, hoisting and assembly of the prefabricated member are facilitated.

As an embodiment, as shown in fig. 1, a first side wall cast-in-place layer 16 is poured between the first side wall prefabricated member 12 and the building envelope 1 and between the first side wall prefabricated member 12 and the first floor slab. The underground structure of this embodiment adopts and pours the cast-in-place layer 16 of first side wall in the first side wall prefab 12 outside and forms the coincide structure, can solve the waterproof problem of assembled underground structure to improve the structural integrity of assembly component. As another embodiment, a first side wall cast-in-place connecting section is cast between the first side wall prefabricated member 12 and the first floor slab, and the first side wall prefabricated member 12 and the first floor slab are connected into a whole through the first side wall cast-in-place connecting section, which is the same as the connection form of the second side wall prefabricated member 8 and the second side wall cast-in-place connecting section 40 in fig. 2. In addition, a waterproof layer can be constructed on the position, corresponding to the first side wall, of the enclosure structure 1, so that the waterproof performance is improved, and then the construction of the first side wall is completed.

As an embodiment, as shown in fig. 1, the flat top slab includes a flat top slab prefabricated member 17 and a flat top slab cast-in-place layer 18, both ends of the flat top slab prefabricated member 17 are respectively disposed on two first side wall prefabricated members 12 on both sides, and the flat top slab cast-in-place layer 18 is cast on the top of the first side wall prefabricated member 12, the top of the first side wall cast-in-place layer 16 and the flat top slab prefabricated member 17, so as to enhance the integrity of the fabricated underground structure and the waterproof performance of the underground structure. As another embodiment, the flat roof slab of the present embodiment may also be in a form of full cast-in-place, and the flat roof slab is formed by pouring concrete on the two first side wall prefabricated members 12 and between the two first side wall prefabricated members 12; as a third embodiment, the flat roof slab may also be in a fully prefabricated form, two ends of the flat roof slab prefabricated member 17 are respectively overlapped on the horizontal portions 151 of the first side wall prefabricated members 12 on two sides, and a cast-in-place connecting section is poured between the flat roof slab prefabricated member 17 and the horizontal portions 151 of the diagonal bracing sections 15. The waterproof layer is constructed on the flat top plate of the embodiment, and the waterproof performance of the assembled underground structure is further improved.

Further, as shown in fig. 1, a second layer board is arranged below the first layer board, second side walls are arranged on two sides of the second layer board, and two ends of the first layer board are respectively arranged on the two second side walls on the two sides.

As an embodiment, as shown in fig. 1, the second side wall includes a second side wall prefabricated member 8, and a second side wall cast-in-place layer 9 is poured between the second side wall prefabricated member 8 and the building envelope 1 and between the second side wall prefabricated member 8 and the flat top slab. Adopt and pour cast-in-place layer 9 of second side wall in 8 outsides of second side wall prefab and form the congruent structure, can reduce the size and the weight of prefab, be convenient for transportation, hoist and mount and assemble. As another embodiment, the second side wall comprises a second side wall prefabricated member 8, and a second side wall cast-in-place connecting section 40 is poured between the bottom of the second side wall prefabricated member 8 and the second laminate, as shown in fig. 2; in addition, the second side wall of this embodiment can also adopt the form of full cast-in-place, through building the template at envelope 1 inboard, assembles the reinforcing bar net and pours concrete formation second cast-in-place side wall. In addition, a waterproof layer can be constructed on the position, corresponding to the first side wall, of the enclosure structure 1, so that the waterproof performance is improved, and then the construction of the first side wall is completed.

Further, as shown in fig. 1, a center pillar 6 is disposed on the second layer board, a center longitudinal beam 7 is disposed on the center pillar 6, and a middle portion of the first layer board is disposed on the center longitudinal beam 7 and supported by the center pillar 6 and the center longitudinal beam 7. The center pillar 6 and the center longitudinal beam 7 of this embodiment may be in a cast-in-place form, or in a prefabricated form, and when a prefabricated member form is adopted, the prefabricated member assembly and fixing can be completed when the cast-in-place concrete of the second side wall is waiting for the age of the cast-in-place concrete, a cast-in-place connecting section is formed between the prefabricated members by pouring concrete to connect the two prefabricated members into a whole, as shown in fig. 2, a seam between the top of the prefabricated member of the center pillar 6 and the prefabricated member of the center longitudinal beam 7 is in cast-in-place connection, and after the bottom of the prefabricated member of the center pillar 6 and the second layer plate are connected by an embedded part, a cast-in-place connecting section 39 of the center pillar.

In one embodiment, the first floor comprises a first floor cast-in-place layer 11 and two first floor prefabricated members 10, two ends of each first floor prefabricated member 10 are respectively arranged on the middle longitudinal beam 7 and one of the second side wall prefabricated members 8, and the first floor cast-in-place layer 11 is cast on the top of the second side wall, the top of the middle longitudinal beam 7 and the first floor prefabricated members 10. As shown in fig. 1-2, a first slab cast-in-place layer 11 is cast on the top of the second side wall prefabricated member 8, the top of the second side wall cast-in-place layer 9, the top of the middle longitudinal beam 7 and the first slab prefabricated member 10, and the second side wall prefabricated member 8, the second side wall cast-in-place layer 9, the middle longitudinal beam 7 and the first slab prefabricated member 10 are integrally cast, so that the integrity of the fabricated underground structure and the waterproof performance of the underground structure are enhanced. As another embodiment, as shown in fig. 2, the first floor of this embodiment includes two first floor prefabricated members 10, one end of each first floor prefabricated member 10 is disposed on the second side wall, the other end of each first floor prefabricated member is disposed on the center longitudinal beam 7, a first floor cast-in-place connecting section 41 is cast between the two first floor prefabricated members 10, and as shown in fig. 2, the first floor cast-in-place connecting section 41 is connected with the enclosure structure 1 in a cast-in-place manner; as a third implementation manner, the first deck of this embodiment may also adopt a full cast-in-place form, and a bottom formwork is built between the second side wall and the middle longitudinal beam 7, and after a reinforcement cage is bound on a construction site, concrete is poured to form the first cast-in-place deck.

Further, as shown in fig. 1-2, a concrete cushion 4 is arranged below the second layer board, and a waterproof layer is constructed between the second layer board and the concrete cushion 4, so that the waterproof performance of the second layer board is improved.

As an implementation manner, the second layer board of the embodiment adopts a full cast-in-place mode, the second layer board is a reinforced concrete cast-in-place layer 5, and as shown in fig. 1, after the reinforcement cage is bound at the construction site, concrete is poured to form the reinforced concrete cast-in-place layer 5. As another embodiment, the second layer plate comprises two second layer plate-side prefabricated members 36 and a second layer plate-in-prefabricated member 37 arranged between the two second layer plate-side prefabricated members 36, and a second layer plate cast-in-place connecting section 38 is cast between the second layer plate-in-place prefabricated member 37 and the second layer plate-side prefabricated member 36. The second layer plate of the embodiment is spliced and connected through the multiple sections of prefabricated parts, so that the size and the weight of a single prefabricated part are reduced, and the prefabricated parts are convenient to transport, hoist and splice; and adjacent prefabricated members are connected in a cast-in-place mode through concrete pouring, and the structural integrity is improved. Further, as shown in fig. 2, a first groove is formed in one side of the second floor-side prefabricated member 36 away from the enclosure structure 1, a second groove is formed in the side of the second floor-side prefabricated member 37 opposite to the first groove, and the second floor-side cast-in-place connecting section 38 is located between the first groove and the second groove; the first groove and the second groove of the embodiment are oppositely arranged, so that the middle of the cast-in-place connecting section 38 of the second laminate is wide, the upper end and the lower end of the cast-in-place connecting section are narrow, and the integrity and the waterproof performance of the assembled underground structure are further improved; in addition, the reinforcing bars reserved on the second deck side prefabricated member 36 extend out of the first groove, the reinforcing bars reserved on the prefabricated member 37 in the second deck extend out of the second groove, the reinforcing bars of the two prefabricated members are partially overlapped in the second deck cast-in-place connecting section 38, so that the connecting strength of the second deck cast-in-place connecting section 38 is improved, the connection between the other two prefabricated members in the embodiment can also adopt the arrangement form of the grooves and the reinforcing bars, for example, the connection between the first deck prefabricated member 10 and the first deck prefabricated member 10 in the form of pouring the first deck cast-in-place connecting section 10 between the first deck prefabricated member 10 and the first deck prefabricated member 10 is adopted. In addition, the second plywood of this embodiment can also adopt superimposed structure, and the second plywood includes two second plywood prefabs, pours the cast-in-place layer of second plywood between two second plywood prefabs and on two second plywood prefabs, forms superimposed structure, and the structure with the first plywood in FIG. 1 is the same, improves assembled underground structure's waterproof performance and structural integrity.

The utility model provides a side wall prefab of assembled flat top stride no post underground structure greatly all adopts cast-in-place "wet node" with the junction of well longeron and the junction of plywood prefab and plywood prefab, and assembled underground structure's waterproof nature, wholeness are good.

The fabricated flat-top large-span pillarless underground structure provided by the embodiment can also be used for underground structures of other N layers, the topmost layer and the bottommost layer of the fabricated flat-top large-span pillarless underground structure can respectively adopt the structural forms of the underground layer and the underground layer of the embodiment, and the side walls and the laminated plates of other layers can also adopt the structural forms of other laminated plates and side walls of the embodiment, which are not detailed herein; the underground structure built by adopting a reasonable component partitioning scheme and a pre-construction supporting plate replacing scheme is not limited by geological conditions, inner supports and the like, and the problems of difficult hoisting and assembling of the construction prefabricated member of the support system in the open cut foundation pit and poor water resistance, poor integrity and the like of an assembled structure are solved; the optimized size and weight of the prefabricated member are adapted to the on-site hoisting and assembling requirements of the foundation pit with the inner support, and the industrialized popularization and application can be better realized. The underground structure that this embodiment provided forms congruent structure through pouring cast-in-place layer in the prefab outside, improves assembled underground structure's waterproof performance and structural integrity, is applicable to major structure engineering such as urban rail transit underground station, basement, utility tunnel.

Example two

As shown in fig. 4 to 6, the present embodiment provides a connection structure of a prefabricated member and a cast-in-place concrete layer, which can be used for connecting a prefabricated member 12 of a first side wall with a cast-in-place first layer plate 11 or a cast-in-place first layer plate when the first side wall is of a laminated structure, and the first layer plate is of a full-cast-in-place or laminated structure, and can also be used for connecting a prefabricated member 8 of a second side wall with a cast-in-place second layer plate or a cast-in-place reinforced concrete layer 5 when the second side wall is of a laminated structure, and the second layer plate is of a full-cast-; the connection structure of the first side wall prefabricated member 12 and the first cast-in-place slab, the connection structure of the second side wall prefabricated member 8 and the second cast-in-place slab or the reinforced concrete cast-in-place slab 5 are the same as those described above, and detailed description thereof is omitted.

The connecting structure of the first side wall prefabricated member 12 and the first floor cast-in-place layer 11 comprises a first side wall cast-in-place layer 16 for connecting the first side wall prefabricated member 12 and the first floor cast-in-place layer 11, a first U-shaped rib 20 reserved on the first floor cast-in-place layer 11 and a second U-shaped rib 22 reserved on the first side wall prefabricated member 12, wherein two side parts of the first U-shaped rib 20 extend into the first floor cast-in-place layer 11 for fixation, the bottom of the first U-shaped rib 20 extends out of the first floor cast-in-place layer 11, and the extension length of the first U-shaped rib is determined according to the calculation requirement of the relative installation position between the first side wall prefabricated member 12 and the first floor cast-in-place layer 11 and the lap joint length; one side part of the second U-shaped rib 22 extends into the first side wall prefabricated part 12, the other side of the second U-shaped rib 22 is located in the first side wall cast-in-place layer 16, the first side wall prefabricated part 12 and the first side wall cast-in-place layer 16 are fixed through two sides of the second U-shaped rib 22, meanwhile, the lower ends of the first U-shaped rib 20 and the second U-shaped rib 22 are overlapped and lapped, the lapping position of the first U-shaped rib 20 and the second U-shaped rib 22 is located in the first side wall cast-in-place layer 16, the first U-shaped rib 20 and the second U-shaped rib 22 are connected in a lapping mode, the problem that the first side wall prefabricated part 12 and the first side wall cast-in-place layer 11 are difficult to connect in site is solved, the first side wall prefabricated part 11, the first side wall prefabricated part 12 and the first side wall cast-in-place layer 16 are connected through the first U-shaped rib 20 and the second U-shaped rib 22, and the.

Further, as shown in fig. 5 and 6, a first positioning member 21 is arranged at the bottom of the first side wall prefabricated member 12, a second positioning member 23 used for being matched and positioned with the first positioning member 21 is arranged on the first slab cast-in-place layer 11, and the first side wall prefabricated member 12 and the first slab cast-in-place layer 11 are positioned through connection of the first positioning member 21 and the second positioning member 23, so that the problem that the first side wall prefabricated member 12 and the first slab cast-in-place layer 11 are difficult to position is effectively solved. As an implementation manner, a leveling device matched with the bottom of the first positioning member 21 may be disposed on the second positioning member 23, so as to improve the positioning accuracy. The positioning and connecting method of the first positioning member 21 and the second positioning member 23 in this embodiment may also be used for positioning and connecting other side wall prefabricated members and layer plates, positioning and connecting middle pillars and layer plates, and positioning and connecting side wall prefabricated members and an enclosure structure.

Further, the first positioning member 21 is arranged in a staggered manner with the overlapping portions of the first U-shaped rib 20 and the second U-shaped rib 22, the positions of the first positioning member 21, the first U-shaped rib 20 and the second U-shaped rib 22 are not affected, the positioning effect of the first positioning member 21 on the first side wall prefabricated member 12 is guaranteed, and the effect of the first U-shaped rib 20 and the effect of the second U-shaped rib 22 on the stress strength of the reinforced connection node are not affected.

Further, one side of first U type muscle 20 and the equal interval of the 22 lap joints of second U type muscle is equipped with many first transverse reinforcement 24, first transverse reinforcement 24 is perpendicular to first U type muscle 20 and the 22 arrangement of second U type muscle, many first transverse reinforcement 24 on the first U type muscle 20 and many first transverse reinforcement 24 mutual dispositions on the second U type muscle 22, through the setting of first transverse reinforcement 24, not only can be used to fixed first U type muscle 20 and the 22U type muscle of second, but also can further strengthen the connected node stress intensity of first side wall prefab 12 and the cast-in-place layer 11 of first floor. In addition, a plurality of second transverse reinforcing steel bars 25 are arranged on the second U-shaped reinforcing steel bars 22 respectively on the two sides of the interior of the first side wall prefabricated member 12 and the interior of the first side wall cast-in-place layer 16 at intervals, the second transverse reinforcing steel bars 25 are perpendicular to the second U-shaped reinforcing steel bars 22, and the stress strength of the connecting node of the first side wall prefabricated member 12 and the first side wall cast-in-place layer 16 is further enhanced through the second transverse reinforcing steel bars 25.

Further, first U type muscle 20 and second U type muscle 22 all have many, all arrange along first transverse reinforcement 24's extending direction, and first U type muscle 20 and second U type muscle 22 distribute in turn, and the overlap joint is buckled mutually of many first U type muscle 20 and second U type muscle 22, has further strengthened first side wall prefabricated component 12 and the cast-in-place layer 11 joint strength of first floor board.

The connecting structure provided by the embodiment solves the problem of difficult positioning implementation of the prefabricated member in the existing fabricated structural member and strengthens the stress strength of the connecting node of the prefabricated member and the concrete cast-in-place layer through buckling connection between the first U-shaped rib 20 and the second U-shaped rib 22 and connection positioning between the first positioning member 21 and the second positioning member 23; meanwhile, the prefabricated member and the concrete cast-in-place layer are cast into an integral structure in a cast-in-place mode, and the problem that water is easy to leak at the joint of the existing fabricated structural member is solved.

The connection structure of the prefabricated member and the cast-in-place concrete layer in the embodiment may also be used for connecting the prefabricated member and the prefabricated member, for example, when the first side wall adopts an overlapped structure, and the first slab adopts a form of a first slab prefabricated member and a first slab cast-in-place connection section, when the second side wall adopts an overlapped structure, and the second slab adopts a form of a second slab cast-in-place prefabricated member and a second slab cast-in-place connection section, the connection of the second side wall prefabricated member and the second slab prefabricated member is only distinguished by replacing the cast-in-place concrete layer with the first slab prefabricated member, and the remaining connection method is not changed, and will not be described in detail herein.

EXAMPLE III

The embodiment provides a connecting structure of prefabricated members and prefabricated members, which can be used for connecting the prefabricated members 10 and 10 of a first layer plate when the first layer plate adopts an overlapping structure, connecting the prefabricated members 16 and 16 of a flat top layer plate when the second layer plate adopts an overlapping structure; the connection structure of the two first-layer plate prefabricated members 10 when the first layer plates adopt the laminated structure is taken as an example for explanation, and the connection structure of the two second-layer plate prefabricated members and the connection structure of the two flat top plate prefabricated members 16 are the same, and the detailed description is omitted here.

As shown in fig. 7-10, the present embodiment provides a connection structure of prefabricated members, a cast-in-place first floor layer 11 is poured between two first floor prefabricated members 10 and above the two first floor prefabricated members 10, a reinforcing steel framework is reserved on each of the two first floor prefabricated members 10, the reinforcing steel framework includes an upper main rib 26, a lower main rib 34, and a connecting rib 28 connecting ends of the upper main rib 26 and the lower main rib 34, the upper main rib 26 and the lower main rib 34 are arranged in parallel, the lower main rib 34 partially extends into the first floor prefabricated member 10 along an extending direction of the first floor prefabricated member 10, the lower main rib 34 extends out of the first floor prefabricated member 10, and the upper main reinforcement 26 and the connecting reinforcement 28 are both arranged inside the first floor cast-in-place layer 11, and the steel bar frames of the two first floor prefabricated members 10 are partially overlapped and arranged inside the first floor cast-in-place layer 11 along the extending direction of the main reinforcement. This embodiment has realized the rigid connection between two first floor prefab 10 through the structure design and the steel framework coincide overlap joint design to first floor prefab 10 to and the common atress of superimposed structure that first floor prefab 10 and the cast-in-place layer 11 of first floor combine, has guaranteed this connection structure's bearing capacity and durability, has solved the problem of the easy percolating water of joint seam of current assembled first floor prefab 9.

Wherein, the bottom junction of two first floor prefab 10 is equipped with stagnant water structure 31, and as an implementation, this stagnant water structure 31 can be the sealing rod.

Further, as shown in fig. 7-10, a plurality of upper longitudinal steel bars 32 are arranged on the upper main bar 26 at intervals along the axial direction, the upper longitudinal steel bars 32 are arranged perpendicular to the upper main bar 26, and the stress strength of the first slab cast-in-place layer 11 is enhanced by arranging the upper longitudinal steel bars 32 and the upper main bar 26 in a criss-cross manner inside the first slab cast-in-place layer 11. Further, as shown in fig. 9 and 10, additional transverse steel bars 27 are arranged on the bottom inner layers of the two first-layer plate prefabricated members 10, the additional transverse steel bars 27 are arranged in parallel with the lower main steel bars 34 in the first-layer plate prefabricated members 10, a plurality of lower longitudinal steel bars 33 are arranged on the additional transverse steel bars 27 at intervals along the axial direction of the additional transverse steel bars, and the additional transverse steel bars 27 and the lower longitudinal steel bars 33 are arranged inside the first-layer plate prefabricated members 10 in a criss-cross manner, so that the stress strength of the two first-layer plate prefabricated members 10 is enhanced; meanwhile, a first wavy vertical tie bar frame 29 is arranged between the additional transverse steel bars 27 and the upper main steel bars 26, wave crests and wave troughs of the first vertical tie bar frame 29 are respectively connected to the upper longitudinal steel bars 32 and the lower longitudinal steel bars 33, and the first floor prefabricated member 10 and the first floor cast-in-place layer 11 are connected through the structure and arrangement mode design of the first vertical tie bar frame 29, so that the connection strength of the first floor prefabricated member 10 and the first floor cast-in-place layer 11 is enhanced, and the bearing capacity of the first floor prefabricated member 10 and the first floor cast-in-place layer 11 after being connected into a whole is improved.

Specifically, the end surfaces of the connecting sides of the two first floor prefabricated members 10 are oblique end surfaces, wherein the connecting rib 28 on one side of one of the first floor prefabricated members 10 is obliquely arranged, and the inclination of the connecting rib 28 is matched with the inclination of the oblique end surface of the other first floor prefabricated member 10, so that the steel bar frame of the first floor prefabricated member 10 can extend above the oblique end surface of the other first floor prefabricated member 10 when being overlapped and lapped with the steel bar frame of the first floor prefabricated member 10, and the connecting rib 28 of the other first floor prefabricated member 10 does not extend out of the connecting rib 28; and be equipped with the second between the splice bar 28 of first floor prefab 10 and upper portion owner muscle 26 and found the tie bar frame 30, the second is found the tie bar frame 30 and is set up for following the first vertical tie bar frame 29 extending direction that draws, has strengthened the intensity of first floor prefab 10 with first floor prefab 10 coincide overlap joint department, found the tie bar frame and can also play the effect of fixed prefabricated component outside steel reinforcement framework simultaneously.

Furthermore, a plurality of additional longitudinal steel bars 35 are arranged on the lower main steel bar 34, the additional longitudinal steel bars 35 are perpendicular to the lower main steel bar 34, the additional longitudinal steel bars 35 are distributed in the first floor prefabricated member 10 and the first floor cast-in-place layer 11 at intervals, and the stress strength of the joint of the first floor prefabricated member 10 and the first floor cast-in-place layer 11 is enhanced through the additional longitudinal steel bars 35. In addition, as shown in fig. 8, the steel frames of the two first floor prefabricated members 10 may be provided in plurality, and the steel frames of the first floor prefabricated members 10 are alternately arranged, so that the connection strength between the first floor prefabricated members 10 and the cast-in-place layer 11 of the first floor is further enhanced, and the overall bearing capacity of the connection structure of the fabricated first floor prefabricated members 10 is improved.

The connecting structure of the prefabricated members and the prefabricated members in the embodiment can also be used for connecting the vertical prefabricated members and the vertical prefabricated members in the length direction of the underground structure to improve the structural integrity and the waterproof performance, for example, the connecting structure of the first side wall prefabricated members 12 and the first side wall prefabricated members 12, the connecting structure of the second side wall prefabricated members 8 and the like can be used, the connecting structure of the vertical prefabricated members is the same as that of the two transverse first floor prefabricated members 10, the two prefabricated members can be used as templates for connecting the two side wall prefabricated members, and the building envelope or other systems which can be used as template conditions can be used for carrying out superposed layer concrete pouring on the other side of the prefabricated members; and will not be described in detail herein.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (15)

1. The utility model provides an assembled flat top is striden no post underground structure greatly which characterized in that: the building structure comprises a building enclosure, a flat top plate, a first plate and a first side wall prefabricated part, wherein the flat top plate and the first plate are arranged in the building enclosure, first side walls are arranged on two sides of the first plate, two ends of the flat top plate are respectively arranged on two first side walls on the two sides, the first side wall comprises a first side wall prefabricated part, the first side wall prefabricated part comprises a vertical section, a horizontal section and an inclined support section, the bottom of the vertical section is connected with the first plate, the top of the vertical section is connected with one end of the horizontal section, and the other end of the horizontal section is connected with one end of the inclined support section; and the other end of the inclined support section is connected with the vertical section.

2. The fabricated flat-top large-span pillarless underground structure of claim 1, wherein: the inclined support section comprises a horizontal part and an inclined support part, one end of the inclined support part is connected with the vertical section, and the other end of the inclined support part and the other end of the horizontal section are connected with one end of the horizontal part.

3. The fabricated flat-top large-span pillarless underground structure of claim 2, wherein: the vertical section, the horizontal section and the inclined support section are integrally prefabricated and molded; or the vertical section, the horizontal section and the inclined support section are prefabricated in a split mode, and a first side wall prefabricated part is formed through assembling.

4. The fabricated flat-top large-span pillarless underground structure of claim 1, wherein: cast-in-place layers of the first side wall are poured between the first side wall prefabricated member and the enclosure structure and between the first side wall prefabricated member and the first floor plate.

5. The fabricated flat-top large-span pillarless underground structure of claim 1, wherein: and a cast-in-situ connecting section of the first side wall is poured between the first side wall prefabricated member and the first slab.

6. The fabricated flat-top large-span pillarless underground structure of claim 4, wherein: the flat top slab comprises a flat top slab prefabricated member and a flat top slab cast-in-place layer, two ends of the flat top slab prefabricated member are respectively arranged on the two first side wall prefabricated members on two sides, and the flat top slab cast-in-place layer is poured on the top of the first side wall prefabricated member, the top of the first side wall cast-in-place layer and the flat top slab prefabricated member.

7. The fabricated flat-top large-span pillarless underground structure of claim 1, wherein: the lower part of the first laminate is provided with a second laminate, the two sides of the second laminate are provided with second side walls, and the two ends of the first laminate are respectively arranged on the two second side walls on the two sides.

8. The fabricated flat-top large-span pillarless underground structure of claim 7, wherein: the second side wall comprises a second side wall prefabricated part, and a second side wall cast-in-place layer is poured between the second side wall prefabricated part and the enclosure structure and between the second side wall prefabricated part and the second laminate.

9. The fabricated flat-top large-span pillarless underground structure of claim 7, wherein: the second side wall comprises a second side wall prefabricated part, and a second side wall cast-in-place connecting section is poured between the bottom of the second side wall prefabricated part and the second laminate.

10. The fabricated flat-top large-span pillarless underground structure of claim 7, wherein: the second laminate is provided with a center pillar, the center pillar is provided with a center longitudinal beam, and the middle of the first laminate is arranged on the center longitudinal beam.

11. The fabricated flat-top large-span pillarless underground structure of claim 10, wherein: the first floor comprises a first floor cast-in-place layer and two first floor prefabricated parts, one end of each first floor prefabricated part is arranged on the middle longitudinal beam, the other end of each first floor prefabricated part is arranged on the second side wall, and the first floor cast-in-place layer is poured on the top of the second side wall, the top of the middle longitudinal beam and the first floor prefabricated parts.

12. The fabricated flat-top large-span pillarless underground structure of claim 10, wherein: the first floor comprises two first floor prefabricated parts, one end of each first floor prefabricated part is arranged on the second side wall, the other end of each first floor prefabricated part is arranged on the middle longitudinal beam, and a first floor cast-in-place connecting section is poured between the two first floor prefabricated parts.

13. The fabricated flat-top large-span pillarless underground structure of claim 7, wherein: and a concrete cushion is arranged below the second laminate, and a waterproof layer is constructed between the second laminate and the concrete cushion.

14. The fabricated flat-top large-span pillarless underground structure of claim 7, wherein: the second layer plate comprises two second layer plate-side prefabricated members and a second layer plate-middle prefabricated member arranged between the two second layer plate-side prefabricated members, and a second layer plate cast-in-place connecting section is poured between the second layer plate-middle prefabricated member and the second layer plate-side prefabricated member.

15. The fabricated flat-top large-span pillarless underground structure of claim 14, wherein: one side of the second layer plate side prefabricated member, which is far away from the enclosure structure, is provided with a first groove, one side of the second layer plate side prefabricated member, which is opposite to the first groove, is provided with a second groove, and the cast-in-place connecting section of the second layer plate is positioned between the first groove and the second groove.

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