CN220978026U - Steel-concrete member, combined crown beam and combined purlin - Google Patents

Abstract

The application discloses a reinforced concrete member, which comprises an H-shaped steel and a reinforcing plate, wherein two flanges of the H-shaped steel face the same end along the thickness direction of a web plate of the H-shaped steel to form a closed end, the two flanges face the same other end to form a connecting end, a plurality of bolt holes are formed in each connecting end, and the bolt holes are arranged at intervals along the length direction of the H-shaped steel; the length of the reinforcing plate extends along the length direction of the H-shaped steel, two ends of the reinforcing plate in the width direction are welded on the two closed ends respectively, a containing cavity is formed between the H-shaped steel and the reinforcing plate, and concrete is filled in the containing cavity. The application also discloses a combined crown beam and a combined enclosing purlin which are manufactured by adopting the steel-concrete member. The reinforced concrete member has higher stability, can be used as a component of a foundation pit structural member, can be conveniently manufactured into a combined crown beam, a combined enclosing purlin, a horizontal support and a bracket, and improves the recovery rate of the foundation pit structural member.

Description

Steel-concrete member, combined crown beam and combined purlin

Technical Field

The utility model relates to a steel-concrete member, a combined crown beam formed by the steel-concrete member and a combined enclosing purlin.

Background

In order to ensure the safety in the construction process of the underground structure, a supporting device is required to be arranged in the foundation pit in the process of excavation of the foundation pit and the construction process of the underground structure so as to avoid landslide or collapse of the foundation pit. In order to improve the construction efficiency, in the existing foundation pit supporting device, various supporting components are generally manufactured by taking section steel as a main part, and because the size and the shape of a foundation pit are different, and the positions of various supporting components are also different in the same foundation pit, the supporting components with different forms are formed, and because each supporting component is designed and manufactured after being calculated according to a geological report, the universality among the supporting components is less considered, and only a small number of supporting components in a large number of recovered supporting components can be re-divided and used as small-sized components after one foundation pit is constructed, and most of recovered supporting components can only be used as waste steel materials, so that the waste of a large number of steel materials is caused, and the construction cost is also improved.

Disclosure of utility model

In order to solve the above problems, the present application firstly proposes a reinforced concrete member, which comprises an H-shaped steel and a reinforcing plate, wherein two flanges of the H-shaped steel are formed as closed ends towards the same end along the thickness direction of a web plate of the H-shaped steel, the two flanges are formed as connecting ends towards the same other end, each connecting end is provided with a plurality of bolt holes, and the bolt holes are arranged at intervals along the length direction of the H-shaped steel;

the length of the reinforcing plate extends along the length direction of the H-shaped steel, two ends of the reinforcing plate in the width direction are welded on the two closed ends respectively, a containing cavity is formed between the H-shaped steel and the reinforcing plate, and concrete is filled in the containing cavity.

The reinforced concrete member is actually a concrete reinforcing member, the reinforcing plate and one groove of the H-shaped steel form a containing cavity together, then concrete is poured in the containing cavity, the strength and the rigidity of the reinforced concrete member are effectively improved by utilizing the rigidity of the concrete and the toughness of the H-shaped steel and the reinforcing plate, and the stability of the reinforced concrete member can be effectively improved, so that the strength and the rigidity of a structural member manufactured by the reinforced concrete member are improved.

Bolt holes on the connecting ends are used as connecting parts with other structural parts, so that the connecting parts can be conveniently detached and recovered. By adopting the extra material and utilizing the bolt holes, two steel-concrete components which are parallel to each other can be connected to form a structural component with higher strength, and the distance between the two steel-concrete components can be adjusted according to the requirement so as to adapt to different working conditions. The additional material may be a plate or a profile.

Because a large number of bolt holes are arranged on the connecting end in advance, various external connectors can be connected to the reinforced concrete member in a detachable mode without temporary additional holes, and therefore, after the external connectors are removed, the external connectors can be smoothly restored to the original state and used for other purposes without reforming the reinforced concrete member again. The connecting end is provided with a large number of bolt holes, and although the strength of the H-shaped steel is lost to a certain extent, the concrete in the accommodating cavity can compensate the loss, and the reinforced concrete component is made into a standard component with set strength and rigidity.

The steel-concrete member can be used for conveniently manufacturing a combined crown beam, a combined enclosing purlin, a horizontal support and a bracket.

Further, in order to facilitate the connection and the disassembly of the two reinforced concrete members, an end plate is welded at least one end of the H-shaped steel in the length direction, and a connecting hole is formed in the end plate. The bolts are utilized, a plurality of steel-concrete components can be sequentially and detachably connected through the connecting holes, so that the length of the steel-concrete components is prolonged, the steel-concrete components are taken as components in other structural members, and after the steel-concrete components are used, the bolts are removed, and the steel-concrete components are recovered into single steel-concrete components for recycling.

Secondly, the application also provides a combined crown beam, which comprises a crown beam frame and filling blocks, wherein the crown beam frame comprises two crown beam members which extend in parallel along the horizontal direction and are arranged at intervals, the two crown beam members are respectively called a first crown beam member and a second crown beam member, each of the two crown beam members is composed of a plurality of steel-concrete members which are sequentially connected, the flanges of H-shaped steel of the steel-concrete members are horizontally arranged, reinforcing plates of the steel-concrete members of the two crown beam members are oppositely arranged, a casting cavity is formed in a space between the two crown beam members, and the top ends of the support piles upwards penetrate through the casting cavity; the filling block is formed by solidifying concrete poured in the pouring cavity;

The first crown beam member is positioned on the inner side of the support pile, and the second crown beam member is positioned on the outer side of the support pile;

A plurality of upper connecting transverse plates are arranged on the upper sides of the two crown beam members and are arranged at intervals along the length direction of the combined crown beam, and two ends of each upper connecting transverse plate are detachably connected to the connecting ends of the upper sides of H-shaped steel of the reinforced concrete members in the two crown beam members respectively by bolts;

a plurality of lower connecting transverse plates are arranged at the lower sides of the two crown beam members and are arranged at intervals along the length direction of the combined crown beam, and two ends of each lower connecting transverse plate are detachably connected to the connecting ends of the lower sides of the H-shaped steel of the reinforced concrete members in the two crown beam members respectively by bolts;

Isolation films are arranged among the filling blocks, the crown beam component, the upper connecting transverse plate and the lower connecting transverse plate.

Further, no divider is provided in the casting cavity. The pouring cavity is a through groove extending along the length direction of the combined crown beam, no dividing piece is arranged in the middle of the pouring cavity until the end part of the combined crown beam, and the continuity of the filling block is maintained. If the combined crown beam is in a closed ring shape, the filling block is in an endless ring shape.

The inner side refers to one side of the support pile facing the inner direction of the foundation pit, and the outer side refers to one side of the support pile facing the outer direction of the foundation pit. The isolating film may be geotextile, plastic film, etc. or may be produced through painting isolating paint onto the surfaces of the crown beam, upper and lower connecting cross plates to form isolating film.

The steel structural members in the existing combined crown beam all adopt a frame structure, and particularly comprise an outer frame and dividing members such as cross braces or connecting plates connected inside the outer frame, the dividing members divide the inner cavity of the outer frame into a large number of independent cavities, each cavity is provided with 1-3 supporting piles to pass through, the dividing members can position and strengthen the outer frame, but in different foundation pit construction, the types of the supporting piles and the shapes of the supporting piles are various, and when the recycled steel structural members are used in another combined crown beam, the dividing members need to be removed and reinstalled. The outer frame is generally made of flat tubes, steel plates or section steel and the like, holes are formed in the inner side of the outer frame, the partition pieces are connected to the outer frame through bolts, when concrete is poured, the inner side ends of the bolts can be poured into the concrete, and in the process of dismantling the combined crown beam and recycling the steel structural members, the partition pieces cannot be smoothly detached from the outer frame due to the fact that the inner side ends of the bolts are bonded into the concrete, accidental damage to the outer frame is often caused, and the outer frame cannot be reused.

The combined crown beam adopts the upper connecting transverse plate and the lower connecting transverse plate to connect two crown beam members which are arranged in parallel into the frame structure, concrete in the frame structure does not contact with bolts, the bolts cannot be influenced, and when the frame structure is recovered, the upper connecting transverse plate, the lower connecting transverse plate and the crown beam members can be recovered only by disassembling the bolts.

In addition, in the existing combined crown beam, the stability of the steel structural member is better enhanced by the dividing piece, but concrete is divided, so that the concrete in the combined crown beam is formed into independent concrete blocks, and as the separating layers are arranged between the steel structural member and the concrete blocks for convenient detachment, the connecting force between each concrete block and the steel structural member is weaker, the combined crown beam can generate outward bending deformation under the pushing and extrusion of the horizontal support, and as the concrete blocks are arranged at intervals and the connecting force between the combined crown beam and the steel structural member is weaker, each concrete block only plays a role of transmitting external force, so that the force generated by the horizontal support is completely resisted by the steel structural member, the plastic deformation of one side of the steel structural member deviating from a foundation pit is extremely easy to be generated, the prestress of the horizontal support is reduced or eliminated, and the supporting effect of the horizontal support on the foundation pit is reduced.

This results in a failure to pre-apply a large axial pre-stress to the horizontal support, so that the composite crown beam can only be used in shallow foundation pit protection of 5-8 meters, or in foundation pit protection of hard soil areas, and cannot be used in foundation pit protection of soft soil areas and deep foundation pit protection.

In the application, the dividing pieces are omitted, so that the lengths of the filling blocks and the combined enclosing purlin are equal, and the filling blocks and the crown beam members resist when being extruded by the horizontal support, so that the combined crown beam can bear larger horizontal thrust, further can maintain larger axial prestress for the horizontal support, can be applied to deep foundation pits of 15-22 meters, and can be applied to foundation pit protection of soft soil areas.

Further, the crown beam frame is formed by sequentially and fixedly connecting a plurality of crown beam units, and each crown beam unit comprises two steel-concrete members which are parallel to each other and are arranged at intervals along the horizontal direction; the flanges of the H-shaped steel of the steel-concrete members are horizontally arranged, the reinforcing plates of the steel-concrete members of the two crown beam members are oppositely arranged in the same crown beam unit, two ends of an upper connecting transverse plate are respectively connected to the connecting ends of the upper sides of the H-shaped steel of the two steel-concrete members of the same crown beam unit, and two ends of a lower connecting transverse plate are respectively connected to the connecting ends of the lower sides of the H-shaped steel of the two steel-concrete members of the same crown beam unit;

the steel-concrete members of the crown beam units facing the same side are mutually connected into a first crown beam member, and the steel-concrete members of the crown beam units facing the same other side are mutually connected into a second crown beam member.

By adopting the design, the construction progress can be effectively accelerated, and the construction efficiency is improved. Before the construction of the combined crown beam, the construction of the crown beam unit is finished in advance, when the combined crown beam is required to be constructed, each crown beam component is directly arranged according to a set position, then steel-concrete components in two adjacent crown beam components are connected, and after the connection is finished, concrete is poured to form a filling block. Therefore, the installation time of the steel structural part of the combined crown beam can be reduced, and the construction efficiency is improved.

The application further provides a combined purlin comprising a purlin frame and a pouring block, wherein the purlin frame comprises two purlin members; when the combined enclosing purlin is arranged on the inner side surface of the support pile, two enclosing purlin members extend in parallel along the horizontal direction and are arranged at intervals along the vertical direction, each enclosing purlin member is composed of a plurality of any one of the steel-concrete members connected in sequence, the web plate of the H-shaped steel of the steel-concrete member is arranged horizontally, and the reinforcing plates of the steel-concrete members of the two enclosing purlin members are arranged oppositely;

A plurality of outer connecting vertical plates are arranged at intervals along the length direction of the combined enclosing purlin at the outer sides of the two enclosing purlin components, and two ends of each outer connecting vertical plate are detachably connected to the connecting ends of the outer sides of H-shaped steel of the steel-concrete components in the two enclosing purlin components respectively; a plurality of inner connecting vertical plates are arranged at intervals along the length direction of the combined enclosing purlin on the inner sides of the two enclosing purlin components, and two ends of each inner connecting vertical plate are detachably connected to the connecting ends of the inner sides of H-shaped steel of the steel-concrete components in the two enclosing purlin components respectively; the space between the two enclosing purlin components is formed into a pouring cavity, and the pouring block is formed by solidifying concrete poured in the pouring cavity.

Preferably no dividing element is provided in the perfusion chamber. The pouring cavity is a through groove extending along the length direction of the combined enclosing purlin until the end part of the combined enclosing purlin is reached, no dividing piece is arranged in the middle of the combined enclosing purlin, and the continuity of the pouring block is maintained. If the combined enclosing purlin is in a closed ring shape, the pouring block is in an endless ring shape.

The inner side of the enclosing purlin member refers to one side of the enclosing purlin member facing the inner direction of the foundation pit, and the outer side of the enclosing purlin member refers to one side of the enclosing purlin member facing the outer direction of the foundation pit.

In order to facilitate recycling of the reinforced concrete member, isolation films are preferably arranged among the pouring block, the enclosing purlin member, the inner connecting vertical plate and the outer connecting vertical plate, and the isolation films can be made of geotechnical cloth, plastic films and other materials, or isolation paint is coated on the surfaces of the enclosing purlin member, the inner connecting vertical plate and the outer connecting vertical plate, and paint films formed by the isolation paint form the isolation films.

The combined enclosing purlin and the combined crown beam have basically the same structure, and the two are different only in that the participation of the supporting piles is avoided, and the combined enclosing purlin is manufactured by adopting steel-concrete members, so that the application range of the steel-concrete members is enlarged, the types of the members are reduced, the universality of the members is improved, and the management cost is reduced.

At present, the purlin is generally prefabricated to enclosing the purlin with concrete, perhaps simply adopt the steel purlin that H steel spliced becomes to enclose, the steel purlin after retrieving can be applied to in the foundation ditch that requires the same, but most foundation ditch all vary, the steel encloses the purlin and is formed by two parallel channel-section steel welding, when the back is used, need split, the split also adopts the gas cutting, when welding and gas cutting, the steel is heated repeatedly, its intensity reduces, can not reach the operation requirement any more, can only be as useless steel, or be cut apart into other small-size non-atress parts, the recycle rate that leads to the steel to enclose the purlin can only keep at 30-40%, cause the waste of a large amount of steels.

Adopt the reinforced concrete component to prepare the combination and enclose the purlin, owing to the combination encloses the purlin and includes two and enclose the purlin component that the interval set up from top to bottom to the pouring has the concrete between two and encloses the purlin component, utilizes the concrete to have high compressive strength's characteristics, improves the rigidity that the purlin was enclosed in the combination, reduces the deformation that the purlin was enclosed in the combination, makes the combination enclose the purlin can be applied to in the foundation ditch of various different grade types and requirement. In addition, because concrete has the advantage of convenient pouring, can set up the distance between two purlin components according to specific needs to form the combination purlin that has not co-altitude, with the area of contact of increase with support stake and foundation ditch inner wall. And can set up required structure in the concrete, need not the structure to weld on the reinforced concrete component, can add the steel reinforcement cage in the concrete when necessary.

After the foundation pit construction is completed, the concrete in the combined enclosing purlin is dismantled, and the steel-concrete member is only required to be kept complete and not destroyed, so that the combined enclosing purlin can be directly used in another foundation pit, and as a part of the combined enclosing purlin is inevitably destroyed to be incapable of being recycled in the construction process, therefore, when the combined enclosing purlin is prepared by adopting the steel-concrete member, the recovery rate of the steel-concrete member can only be kept at 92-96% and cannot be fully recycled, but compared with the existing steel enclosing purlin spliced by adopting H steel alone, the recovery rate of the steel-concrete member is still greatly improved, and the construction cost is reduced.

Because in the same foundation ditch work progress, the steel-concrete component can be used for preparing combination crown beam and combination enclosing purlin as standard component, reduced the management cost of structure in the foundation ditch construction by a wide margin, in fact, utilize the steel-concrete component can also make structural members such as horizontal support and support as horizontal support.

Further, the enclosing purlin frame is formed by sequentially and fixedly connecting a plurality of enclosing purlin units, and each enclosing purlin unit comprises steel-concrete members which are parallel to each other and are arranged at intervals along the vertical direction; the web plates of the H-shaped steel of the steel-concrete member are horizontally arranged, the same enclosing purlin unit and the reinforcing plates of the steel-concrete members of the two crown beam members are oppositely arranged, two ends of the inner connecting vertical plate are respectively connected to the connecting ends of the inner sides of the H-shaped steel of the two steel-concrete members of the same enclosing purlin unit, and two ends of the outer connecting vertical plate are respectively connected to the connecting ends of the outer sides of the H-shaped steel of the two steel-concrete members of the same enclosing purlin unit;

The steel-concrete components of the enclosing purlin unit facing upwards are mutually connected into one purlin component, and the steel-concrete components of the enclosing purlin unit facing downwards are mutually connected into another purlin component.

According to different requirements, concrete is poured between two steel-concrete members of the enclosing purlin unit, and concrete unit blocks are formed, or concrete is not poured, a cavity is kept, and after the erection of the enclosing purlin unit is completed in the foundation pit, concrete is poured.

By adopting the design, the construction progress can be effectively accelerated, and the construction efficiency is improved. Before the construction of the combined enclosing purlin, the construction of the enclosing purlin unit is finished in advance, when the combined enclosing purlin is required to be constructed, each enclosing purlin component is directly arranged according to a set position, then steel-concrete components of two adjacent crown beam components are connected, when the enclosing purlin unit is not filled with concrete, concrete is poured after the connection is finished, and a pouring block is formed. When concrete is poured into the surrounding purlin units, fine stone concrete is poured between adjacent concrete unit blocks after the steel-concrete members of adjacent surrounding purlin units are connected, and the concrete unit blocks are connected. The construction efficiency is improved due to the reduction of the installation time of the steel structural members combined with the purlin.

Drawings

Fig. 1 is a schematic structural view of a reinforced concrete member.

Fig. 2 is a view in the direction A-A in fig. 1.

Fig. 3 is a schematic view of the structure of the composite crown beam.

Fig. 4 is a schematic view of the construction of fig. 3 with the support piles removed.

Fig. 5 is a top view of fig. 3.

Fig. 6 is a schematic view of the structure of fig. 5 with the filler pieces removed.

Fig. 7 is a schematic view of the structure of the composite purlin.

Fig. 8 is a schematic view of the F-F direction in fig. 7.

Fig. 9 is an enlarged view of a portion G in fig. 7.

Fig. 10 is a schematic view of a partial structure of a foundation pit support device employing a composite crown beam and a composite purlin.

Detailed Description

Example 1

Steel-concrete component 100: referring to fig. 1 and 2, the reinforced concrete member 100 comprises an H-section steel 11 and a reinforcing plate 15, wherein two flanges 13 of the H-section steel are formed into a closed end 138 toward the same end along the thickness direction of a web 12 of the H-section steel 11, and are formed into a connecting end 139 toward the same end, and each connecting end 139 is provided with a plurality of bolt holes 14 which are arranged at intervals along the length direction of the H-section steel. In the embodiment, the model of the H-shaped steel 11 is H700 multiplied by 300, the inner diameter of the bolt hole is 18mm, and the center distance between adjacent bolt holes is 250mm.

The length of the reinforcing plate 15 extends along the length direction of the H-shaped steel 11, both ends of the reinforcing plate 15 in the width direction are welded to the two closed ends 138, respectively, a receiving cavity 111 is formed between the H-shaped steel and the reinforcing plate, and the receiving cavity 111 is filled with the first concrete 16. The notch of the groove on one side of the H-shaped steel, which is far away from the reinforcing plate, is open. The end plates 17 are welded at both ends of the H-beam in the length direction, and connection holes 171 for connecting two reinforced concrete members together to extend the length thereof are formed in the end plates. The inner diameter of the connecting hole is 18mm.

It will be appreciated that in another embodiment, the end plates may be welded at only one end of the length of the H-section steel.

Example 2

Composite crown beam 120: referring to fig. 3 to 6, the composite crown 120 includes a crown frame including two crown members extending in parallel in a horizontal direction and disposed at intervals, respectively referred to as a first crown member 128 and a second crown member 129, each of which is composed of a plurality of the above-mentioned steel-concrete members 100 connected in sequence, flanges 13 of H-section steel of the steel-concrete members 100 are disposed horizontally, reinforcing plates 15 of the steel-concrete members of the two crown members are disposed opposite to each other, a space between the two crown members is formed as a casting cavity 251 through which the top ends of the support piles 20 pass upward, and a filling block 25 is formed after the concrete cast in the casting cavity is solidified.

In this embodiment, no dividing piece is arranged in the pouring cavity, that is, the pouring cavity is a through groove extending along the length direction of the combined crown beam, until the end of the combined crown beam, no dividing piece is arranged in the middle of the combined crown beam, so that the continuity of the filling block is maintained.

The first crown-beam member 128 is located inboard of the stake 20 and the second crown-beam member 129 is located outboard of the stake 20; the inner side refers to one side of the support pile facing the inner direction of the foundation pit, and the outer side refers to one side of the support pile facing the outer direction of the foundation pit.

A plurality of upper connecting transverse plates 21 are arranged on the upper sides of the two crown beam members, the upper connecting transverse plates 21 are arranged at intervals along the length direction of the combined crown beam, and after a first bolt 23 passes through bolt holes of the upper connecting plate and the upper connecting end, two ends of the upper connecting transverse plates 21 are respectively detachably connected to the upper connecting ends of H-shaped steel of the steel-concrete member in the two crown beam members.

A plurality of lower connecting transverse plates 22 are arranged at the lower sides of the two crown beam members, the lower connecting transverse plates 22 are arranged at intervals along the length direction of the combined crown beam, and after a second bolt 24 passes through bolt holes of the upper connecting plate and the connecting end of the lower side, two ends of the lower connecting transverse plates are respectively and detachably connected to the connecting ends of the lower sides of the H-shaped steel of the steel-concrete members in the two crown beam members.

In this embodiment, the support pile 20 is formed of a stirring pile 26 and an H-steel pile 27 inserted in the stirring pile, the top end of the H-steel pile faces upward beyond the top end face of the stirring pile, and adjacent stirring piles overlap each other in the radial direction. The lower connecting cross plate is supported on the top end surface of the stirring pile, and the H-shaped steel pile 27 upwards exceeds the upper connecting cross plate. Geotextile as an isolating membrane is arranged among the filling blocks, the crown beam member, the upper connecting transverse plate and the lower connecting transverse plate. It will be appreciated that in other embodiments, the use of plastic film as the barrier film is also utilized, or the barrier paint is painted on the inner sides of the crown beam member, the upper and lower connecting rails, and the paint film formed from the barrier paint is used as the barrier film.

In the embodiment, the crown beam frame is formed by sequentially and fixedly connecting a plurality of crown beam units, and each crown beam unit comprises steel-concrete members which are parallel to each other and are arranged at intervals along the horizontal direction; the flange of the H-shaped steel of the steel-concrete member is horizontally arranged, the reinforcing plates of the steel-concrete members of the two crown-beam members are oppositely arranged in the same crown-beam unit, two ends of the upper connecting transverse plate are respectively connected to the connecting ends of the upper sides of the H-shaped steel of the two steel-concrete members of the same crown-beam unit, and two ends of the lower connecting transverse plate are respectively connected to the connecting ends of the lower sides of the H-shaped steel of the two steel-concrete members of the same crown-beam unit. The steel concrete members of the crown units facing the same side are interconnected as a first crown member 128 and the steel concrete members of the crown units facing the same other side are interconnected as a second crown member 129.

When the combined crown beam is constructed, the crown beam units are sleeved at the top of the supporting piles 20 according to the set positions, the lower connecting transverse plates are supported on the top end faces of the stirring piles 26, the end plates of the steel-concrete members in the adjacent crown beam units are abutted together, the bolts connect the adjacent crown beam units through the connecting holes in the end plates, and after the connection of the crown beam units is completed, geotextile and cast concrete are paved to form filling blocks.

Example 3

The combination encloses purlin 400: referring to fig. 7-9, the composite purlin 400 includes a purlin frame including two purlin members 401, and a perfusion block 43; the combined enclosing purlin is used for being installed on the inner side face of a supporting pile, when the combined enclosing purlin is installed on the inner side face of the supporting pile, two enclosing purlin components extend in parallel along the horizontal direction and are arranged at intervals along the vertical direction, the two enclosing purlin components are composed of a plurality of steel-concrete components 100 which are sequentially connected, a web 12 of H-shaped steel of the steel-concrete components is horizontally arranged, and reinforcing plates 15 of the steel-concrete components of the two enclosing purlin components are oppositely arranged.

A plurality of external connection vertical plates 41 which are arranged at intervals along the length direction of the combined enclosing purlin are arranged on the outer sides of the two enclosing purlin members 401, two ends of each external connection vertical plate are detachably connected to the connecting ends of the outer sides of H-shaped steel of the reinforced concrete members in the two enclosing purlin members respectively, and the connecting ends of the outer sides are connecting ends facing the outer direction of the foundation pit. A plurality of inner connecting vertical plates 42 which are arranged at intervals along the length direction of the combined enclosing purlin are arranged on the inner sides of the two enclosing purlin components, two ends of each inner connecting vertical plate are detachably connected to the connecting ends of the inner sides of H-shaped steel of the steel-concrete components in the two enclosing purlin components respectively, and the connecting ends of the inner sides are connecting ends facing the inner direction of the foundation pit. The space between the two purlin enclosing members forms a pouring cavity 431, and the pouring block 43 is formed by the concrete poured in the pouring cavity after solidification.

The inner side of the enclosing purlin member refers to one side of the enclosing purlin member facing the inner direction of the foundation pit, and the outer side of the enclosing purlin member refers to one side of the enclosing purlin member facing the outer direction of the foundation pit.

In order to be convenient for retrieve the reinforced concrete component, in this embodiment, all be provided with the barrier film between pouring block and enclosing purlin component, interior connection riser and external connection riser, the barrier film specifically adopts geotechnique's cloth. It will be appreciated that in another embodiment, the barrier film may also be a plastic film, or a barrier paint may be applied to the surfaces of the purlin member, the inner and outer connecting risers, and the paint film formed from the barrier paint is formed as a barrier film.

In this embodiment, no divider is provided within the perfusion chamber. The pouring cavity is a through groove extending along the length direction of the combined enclosing purlin until the end part of the combined enclosing purlin is reached, no dividing piece is arranged in the middle of the combined enclosing purlin, and the continuity of the pouring block is maintained.

In the embodiment, the enclosing purlin frame is formed by sequentially and fixedly connecting a plurality of enclosing purlin units, and each enclosing purlin unit comprises steel-concrete members which are parallel to each other and are arranged at intervals along the vertical direction; the web plates of the H-shaped steel of the steel-concrete member are horizontally arranged, the same enclosing purlin unit and the reinforcing plates of the steel-concrete members of the two crown beam members are oppositely arranged, two ends of the inner connecting vertical plate are respectively connected to the connecting ends of the inner sides of the H-shaped steel of the two steel-concrete members of the same enclosing purlin unit, and two ends of the outer connecting vertical plate are respectively connected to the connecting ends of the outer sides of the H-shaped steel of the two steel-concrete members of the same enclosing purlin unit; the steel-concrete components of the enclosing purlin unit facing upwards are mutually connected into one purlin component, and the steel-concrete components of the enclosing purlin unit facing downwards are mutually connected into another purlin component.

When setting up and enclose the purlin, erect each purlin unit in order and set up the position, then utilize the bolt to link together the end board on the reinforced concrete component of adjacent purlin unit, then pour fine stone concrete between adjacent concrete unit piece, connect each concrete unit piece into the pouring piece.

It will be appreciated that in another embodiment, the purlin units do not include concrete blocks within the purlin units, and the purlin units include only steel structures. When the purlin is erected, the purlin units are sequentially connected by bolts to form two purlin members, and then concrete is poured into a pouring cavity between the two purlin members to form a pouring block.

The use of the above-described composite crown beam and composite purlin in a foundation pit support device including a support pile 20 disposed along the edge of a foundation pit, with a composite crown beam 120 disposed on top of the support pile, and a first horizontal brace 410 removably attached to the composite crown beam 120 via a first connector 300, is briefly described below with reference to fig. 10.

A composite enclosing purlin 400 is mounted on the inner side of the support pile 20, and a bracket 201 is mounted on the inner wall of the support pile, and the composite enclosing purlin is erected on the bracket 201. The second horizontal brace 420 is removably attached to the composite purlin 400 via a second connector 440. The depth of the foundation pit in this embodiment is 20 meters.

In this embodiment, the first horizontal support and the second horizontal support are opposite supports.

Claims (8)

1. The reinforced concrete component is characterized by comprising H-shaped steel and a reinforcing plate, wherein two flanges of the H-shaped steel face the same end along the thickness direction of a web plate of the H-shaped steel to form closed ends, the two flanges face the same other end to form connecting ends, a plurality of bolt holes are formed in each connecting end, and the bolt holes are arranged at intervals along the length direction of the H-shaped steel;

the length of the reinforcing plate extends along the length direction of the H-shaped steel, two ends of the reinforcing plate in the width direction are welded on the two closed ends respectively, a containing cavity is formed between the H-shaped steel and the reinforcing plate, and concrete is filled in the containing cavity.

2. A reinforced concrete structure according to claim 1, wherein,

At least one end of the H-shaped steel in the length direction is welded with an end plate, and a connecting hole is formed in the end plate.

3. The combined crown beam is characterized by comprising a crown beam frame and filling blocks, wherein the crown beam frame comprises two crown beam members which extend in parallel along the horizontal direction and are arranged at intervals, the two crown beam members are respectively called a first crown beam member and a second crown beam member, each crown beam member is composed of a plurality of steel-concrete members according to claim 1 or 2 which are sequentially connected, flanges of H-shaped steel of the steel-concrete members are horizontally arranged, reinforcing plates of the steel-concrete members of the two crown beam members are oppositely arranged, a casting cavity is formed in a space between the two crown beam members, and the top ends of the supporting piles upwards penetrate through the casting cavity; the filling block is formed by solidifying concrete poured in the pouring cavity;

The first crown beam member is positioned on the inner side of the support pile, and the second crown beam member is positioned on the outer side of the support pile;

A plurality of upper connecting transverse plates are arranged on the upper sides of the two crown beam members and are arranged at intervals along the length direction of the combined crown beam, and two ends of each upper connecting transverse plate are detachably connected to the connecting ends of the upper sides of H-shaped steel of the reinforced concrete members in the two crown beam members respectively by bolts;

a plurality of lower connecting transverse plates are arranged at the lower sides of the two crown beam members and are arranged at intervals along the length direction of the combined crown beam, and two ends of each lower connecting transverse plate are detachably connected to the connecting ends of the lower sides of the H-shaped steel of the reinforced concrete members in the two crown beam members respectively by bolts;

Isolation films are arranged among the filling blocks, the crown beam component, the upper connecting transverse plate and the lower connecting transverse plate.

4. The composite crown beam of claim 3, wherein the crown beam is formed from a plurality of crown beams,

No dividing piece is arranged in the casting cavity.

5. The composite crown beam of claim 3, wherein the crown beam is formed from a plurality of crown beams,

The crown beam frame is formed by sequentially and fixedly connecting a plurality of crown beam units, and each crown beam unit comprises two steel-concrete members which are parallel to each other and are arranged at intervals along the horizontal direction; the flanges of the H-shaped steel of the steel-concrete members are horizontally arranged, the reinforcing plates of the steel-concrete members of the two crown beam members are oppositely arranged in the same crown beam unit, two ends of an upper connecting transverse plate are respectively connected to the connecting ends of the upper sides of the H-shaped steel of the two steel-concrete members of the same crown beam unit, and two ends of a lower connecting transverse plate are respectively connected to the connecting ends of the lower sides of the H-shaped steel of the two steel-concrete members of the same crown beam unit;

the steel-concrete members of the crown beam units facing the same side are mutually connected into a first crown beam member, and the steel-concrete members of the crown beam units facing the same other side are mutually connected into a second crown beam member.

6. The combined enclosing purlin is characterized in that,

The purlin comprises an enclosing purlin frame and pouring blocks, wherein the enclosing purlin frame comprises two enclosing purlin components; when the combined enclosing purlin is arranged on the inner side surface of the support pile, two enclosing purlin members extend in parallel along the horizontal direction and are arranged at intervals along the vertical direction, each enclosing purlin member is composed of a plurality of steel-concrete members in claim 1 or 2 which are sequentially connected, the web plate of H-shaped steel of the steel-concrete member is horizontally arranged, and reinforcing plates of the steel-concrete members of the two enclosing purlin members are oppositely arranged;

A plurality of outer connecting vertical plates are arranged at intervals along the length direction of the combined enclosing purlin at the outer sides of the two enclosing purlin components, and two ends of each outer connecting vertical plate are detachably connected to the connecting ends of the outer sides of H-shaped steel of the steel-concrete components in the two enclosing purlin components respectively; a plurality of inner connecting vertical plates are arranged at intervals along the length direction of the combined enclosing purlin on the inner sides of the two enclosing purlin components, and two ends of each inner connecting vertical plate are detachably connected to the connecting ends of the inner sides of H-shaped steel of the steel-concrete components in the two enclosing purlin components respectively; the space between the two enclosing purlin components is formed into a pouring cavity, and the pouring block is formed by solidifying concrete poured in the pouring cavity.

7. The composite purlin of claim 6, wherein,

No divider is provided in the perfusion chamber.

8. The composite purlin of claim 6, wherein,

The purlin enclosing frame is formed by sequentially and fixedly connecting a plurality of purlin enclosing units, and each purlin enclosing unit comprises steel-concrete members which are parallel to each other and are arranged at intervals along the vertical direction; the web plates of the H-shaped steel of the steel-concrete member are horizontally arranged, the same enclosing purlin unit and the reinforcing plates of the steel-concrete members of the two crown beam members are oppositely arranged, two ends of the inner connecting vertical plate are respectively connected to the connecting ends of the inner sides of the H-shaped steel of the two steel-concrete members of the same enclosing purlin unit, and two ends of the outer connecting vertical plate are respectively connected to the connecting ends of the outer sides of the H-shaped steel of the two steel-concrete members of the same enclosing purlin unit;

The steel-concrete components of the enclosing purlin unit facing upwards are mutually connected into one purlin component, and the steel-concrete components of the enclosing purlin unit facing downwards are mutually connected into another purlin component.