CN212316988U - Reinforcing structure of existing structure opening and new structure connection node - Google Patents
Reinforcing structure of existing structure opening and new structure connection node Download PDFInfo
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- CN212316988U CN212316988U CN202020349648.0U CN202020349648U CN212316988U CN 212316988 U CN212316988 U CN 212316988U CN 202020349648 U CN202020349648 U CN 202020349648U CN 212316988 U CN212316988 U CN 212316988U
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Abstract
The utility model provides an existing structure is opened hole and is plugged into reinforced structure of node with new construction, in this reinforced structure, include the L type lintel that sets up L shape between the node of plugging into of existing structure and new construction, L type lintel is including vertical section and horizontal segment, the vertical setting of vertical section, vertical section setting is between the roof of existing structure roof and new construction, has realized plugging into of existing structure and new construction promptly, has undertaken the moment of flexure that both sides roof load produced again, effectively guarantees structure safety. The utility model discloses need not increase higher joist in the bottom of existing structure roof, just so can increase the size of opening a hole, guarantee building function, the utility model discloses also need not set up the movement joint, can reduce the condition emergence of percolating water, it is littleer to the influence of existing track line under the condition of guaranteeing structure safety, guarantee subway safety operation, construction technical scheme is safer and the practicality is stronger in the past.
Description
Technical Field
The utility model relates to a track traffic technical field, more specifically say, in particular to existing structure opens hole and new construction reinforced structure of node of plugging into.
Background
The scale of urban construction in China is rapidly expanded, rail transit lines are gradually formed into a net, the scale of the existing underground station cannot meet the increasing passenger flow demand, and the station needs to be modified to meet the passenger flow demand.
To the transformation of underground station, generally can divide into and increase station room space and with the landmass two kinds of mainstream projects of plugging into in the square that sink, no matter which kind of transformation construction, the existing station side wall all inevitably has the condition of opening a hole on a large scale, the condition that existing structure and new construction plug into can also appear simultaneously. Because the beam column structure is not reserved at the position of the opening of the side wall of the existing structure, after the opening, the stress of the structure at the new and old connection nodes of the connection part is difficult to meet the design requirements, and the structure needs to be reinforced and reinforced.
The existing strengthening and reinforcing measures for the structure after the hole is opened mainly adopt the following scheme: the foundation is reinforced, deformation joints (the deformation joints are general terms of expansion joints, settlement joints and shockproof joints) are additionally arranged, the building is often deformed under the action of external factors, cracking and even damage are caused, the deformation joints are reserved for the situation, the new and old structure connection nodes are separated towards one meter of the new structure side by adopting the deformation joints, and then the beam column structures are respectively arranged. The implementation of above-mentioned scheme can form two rows of post structures in new and old structure range of plugging into in the construction of opening a hole by a large scale, and it seriously influences the building space, has still reduced simultaneously pleasing to the eye in the station to deformation joint, new and old structure node can appear twice waterproof weak point, arouse later stage structure easily and leak.
In summary, how to provide a connection structure with a small occupied space becomes a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a realize through following technical scheme:
the utility model provides a current structure opens hole and new construction reinforced structure of node of plugging into, this current structure opens hole and new construction reinforced structure of node of plugging into includes:
the structure comprises an existing structure, a side wall and a top plate of the existing structure, wherein the top plate of the existing structure is connected with the top end of the side wall, a hole opening part of the side wall is formed with an opening of the side wall of the existing structure, and reinforcing steel bars of the top plate of the existing structure are arranged in the top plate of the existing structure;
the novel structure comprises a novel structure top plate, and novel structure top plate steel bars are arranged in the novel structure top plate;
the L-shaped lintel comprises a vertical section and a horizontal section, wherein the horizontal section is connected to the lower end of the vertical section, the vertical section is connected between the existing structure and the new structure, and the horizontal section is connected with the existing structure and used for bearing the existing structure.
Preferably, the side wall is internally provided with existing structure side wall steel bars, and the existing structure side wall steel bars are connected with the horizontal section.
Preferably, the existing structure top plate and the new structure top plate are respectively connected with the vertical section; the bottom surface of the existing structure top plate is connected with the horizontal section.
Preferably, the existing structure roof plate steel bars and the new structure roof plate steel bars are arranged in the vertical section in a staggered mode.
Preferably, the reinforced structure is still including newly establishing the structural column, newly establishing the structural column and being provided with two, two newly establishing the structural column and setting up respectively at the both ends of entrance to a cave, two the top of newly establishing the structural column all with L type lintel connection.
Preferably, the steel bars of the newly-established structural column are connected with the existing structure through embedded steel bars, and the steel bars of the existing structural side wall are reserved in the lower end of the newly-established structural column to enhance the reliability of connection between the newly-established structural column and the side wall.
Preferably, the length of the existing structure side wall steel bar in the newly-arranged structural column is 35d to 37d, wherein d is the diameter of the existing side wall steel bar.
Preferably, the reinforcing structure further comprises a plurality of temporary supports, and the plurality of temporary supports are arranged in the horizontal section at intervals.
Preferably, each temporary support comprises two support units, each support unit comprises a bottom plate, a support tube and a top plate, the support tubes are arranged between the bottom plates and the top plates, the two bottom plates in the two support units are in butt joint by adopting single-side V-shaped groove welding, wedge blocks are arranged below the outer sides of the two bottom plates in the two support units, and the included angle between the two bottom plates is smaller than 180 degrees.
Preferably, be provided with a plurality of anchor bolt holes on the roof, the downthehole lower extreme that is used for setting up the crab-bolt of crab-bolt, the upper end anchor of crab-bolt goes into in the existing structure roof.
Preferably, the top plate is of a rectangular structure, four anchor bolt holes are formed in each top plate, and the four anchor bolt holes are respectively formed in four corners of the top plate.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a reinforced structure of existing structure division hole and new construction node of plugging into. The utility model discloses in, specifically include and set up the L type lintel of L shape between the node of plugging into of existing structure and new construction, L type lintel links into whole with new construction roof and existing construction roof through L type lintel including vertical section and horizontal segment, and simultaneously, the horizontal segment of L type lintel can also support, consolidate the position of opening a hole of existing structure. Furthermore, the horizontal section in the L-shaped lintel is horizontally arranged and is positioned at the bottom of the top plate of the existing structure and used for bearing the shearing force transmitted by the top plate of the existing structure, so that the stability of the structure after the existing structure is holed is ensured. The vertical section of the L-shaped lintel is vertically arranged, and the vertical section is arranged between the top plate of the existing structure and the top plate of the new structure, so that the existing structure and the new structure are connected, the bending moment generated by the loads of the top plates on the two sides is born, and the structure safety is effectively ensured. The utility model discloses remaining partial existing structure roof reinforcing bar and existing structure side wall reinforcing bar, going into the fixed connection that L type lintel realized existing structure and L type lintel through the reinforcing bar anchor, this scheme has reduced the crack at connection position effectively, reduces the risk of percolating water when using. Meanwhile, the same reinforcing steel bar anchoring and fixing scheme is adopted between the L-shaped lintel and the new structure top plate, so that the risk of water leakage in use is reduced while connection between the existing structure and the new structure is realized.
Compared with the prior art, the utility model discloses need not increase higher joist in the bottom of existing structure roof, just so can increase the size of opening a hole, guarantee building function, the utility model discloses also need not set up the movement joint, can reduce the condition emergence of percolating water, it is littleer to the influence of existing track line under the condition of guaranteeing structure safety, guarantees subway safety operation. The utility model discloses can open the hole position to the side wall and carry out the reinforcement safely, guarantee the rigid connection of the node of plugging into, reduce the risk of percolating water from now on, increase the height at hole position (entrance to a cave) is opened to the side wall, the better pipeline arrangement that satisfies. Compared with the prior construction technical scheme, the construction method is safer and has stronger practicability.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. Wherein:
FIG. 1 is a schematic diagram of a structure of an existing structure at a side wall opening part (a hole opening);
FIG. 2 is a schematic diagram of the structure of the existing structure after the side wall is holed;
fig. 3 is a schematic diagram of the structure of the present invention at the connection position after the existing structure and the new structure are connected;
FIG. 4 is a cross-sectional view of a reinforcement of an L-shaped lintel in an embodiment of the present invention;
FIG. 5 is a structural diagram of a reinforcement of an L-shaped lintel in an embodiment of the present invention;
fig. 6 is a schematic structural view of the existing structural side wall of the embodiment of the present invention when a new structural column construction hole is formed;
fig. 7 is a schematic structural view of the side wall of the existing structure provided with a supporting opening in the embodiment of the present invention;
fig. 8 is a schematic structural view of the side wall of the existing structure provided with an L-shaped lintel construction hole in the embodiment of the present invention;
fig. 9 is a schematic structural view of the embodiment of the present invention after the L-shaped lintel is poured in the L-shaped lintel construction opening;
fig. 10 is a schematic structural view of the existing sidewall structure when forming the existing sidewall structure opening in the embodiment of the present invention;
fig. 11 is a schematic structural view of the side wall of the existing structure after the temporary support is cut off from the opening of the side wall;
fig. 12 is a schematic structural view of a temporary support according to an embodiment of the present invention;
fig. 13 is a side view of a temporary support in an embodiment of the invention;
fig. 14 is a top view of a temporary support in an embodiment of the invention.
Description of reference numerals:
the structural roof plate 1, the structural side wall opening 2, the structural roof plate steel bar 3,
A new structure top plate 4, new structure top plate steel bars 5, a vertical section 6, a horizontal section 7,
Side wall steel bars 8 with the existing structure, a bottom plate 9, a supporting pipe 10, a top plate 11,
A newly-arranged structural column construction hole 12, a support hole 13, an L-shaped lintel construction hole 14,
A wedge block 15, a newly-arranged structural column 16, an anchor bolt 17 and an anchor bolt hole 18.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. Each example is provided by way of explanation of the invention and not limitation of the invention. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit of the invention. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present invention encompass such modifications and variations as fall within the scope of the appended claims and equivalents thereof.
In the description of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. The terms "connected", "connected" and "disposed" used in the present invention should be understood in a broad sense, and may be, for example, either fixedly connected or detachably connected; they may be directly connected or indirectly connected through intermediate members, and specific meanings of the above terms will be understood by those skilled in the art as appropriate.
Referring to fig. 1 to 14, fig. 1 is a schematic diagram of an existing structure located at a sidewall opening portion (opening); FIG. 2 is a schematic diagram of the structure of the existing structure after the side wall is holed; fig. 3 is a schematic diagram of the structure of the present invention at the connection position after the existing structure and the new structure are connected; FIG. 4 is a cross-sectional view of a reinforcement of an L-shaped lintel in an embodiment of the present invention; FIG. 5 is a structural diagram of a reinforcement of an L-shaped lintel in an embodiment of the present invention; fig. 6 is a schematic structural view of the existing structural side wall of the embodiment of the present invention when a new structural column construction hole is formed; fig. 7 is a schematic structural view of the side wall of the existing structure provided with a supporting opening in the embodiment of the present invention; fig. 8 is a schematic structural view of the side wall of the existing structure provided with an L-shaped lintel construction hole in the embodiment of the present invention; fig. 9 is a schematic structural view of the embodiment of the present invention after the L-shaped lintel is poured in the L-shaped lintel construction opening; fig. 10 is a schematic structural view of the existing sidewall structure when forming the existing sidewall structure opening in the embodiment of the present invention; fig. 11 is a schematic structural view of the side wall of the existing structure after the temporary support is cut off from the opening of the side wall; fig. 12 is a schematic structural view of a temporary support according to an embodiment of the present invention; fig. 13 is a side view of a temporary support in an embodiment of the invention; fig. 14 is a top view of a temporary support in an embodiment of the invention.
The utility model provides a current structure opens hole and new construction reinforced structure of node of plugging into the utility model discloses in, this reinforced structure concrete structure form as follows: the structure comprises an existing structure, wherein the existing structure comprises an existing structure top plate 1 and an existing structure side wall, the existing structure side wall is provided with an existing structure side wall hole 2 (the hole is formed by opening a hole), the existing structure top plate 1 is internally provided with an existing structure top plate reinforcing steel bar 3, and the existing structure side wall is internally provided with an existing structure side wall reinforcing steel bar 8; the novel structure comprises a novel structure top plate 4, and novel structure top plate steel bars 5 are arranged in the novel structure top plate 4; l type lintel, L type lintel are including vertical section 6 and horizontal segment 7, and horizontal segment 7 is connected at the lower extreme of vertical section 6, and vertical section 6 is connected between existing structure (existing structure roof 1) and new construction (new construction roof 4), and vertical section 6 is connected with existing structure roof reinforcing bar 3 and new construction roof reinforcing bar 5, and horizontal segment 7 and existing structural connection, be used for bearing existing structure. The side wall steel bars 8 of the existing structure are connected with the horizontal section 7.
In the utility model, the existing structure top plate 1 and the new structure top plate 4 are respectively connected with the vertical section 6; the bottom surface of the existing structure top plate 1 is connected with the horizontal section 7. The top plate (the existing structure top plate 1 and the new structure top plate 4) is connected with the vertical section 6, which can be directly connected, that is, the surfaces of the two structures are in direct contact, of course, the top plate (the existing structure top plate 1 and the new structure top plate 4) is connected with the vertical section 6, or can be indirectly connected, that is, other auxiliary components, such as weather-resistant rubber or metal profile members, are arranged between the surfaces of the two structures, and certain special structural requirements are met by arranging other auxiliary components, for example, a connection part is required to have certain deformation resistance, and the like, which can be achieved by the weather-resistant rubber.
In order to improve the firm degree that vertical section 6 set up between existing structure and new construction, the utility model discloses following optimal design has been made to the setting of reinforcing bar: the tip of existing structure roof reinforcing bar 3 and the tip of new structure roof reinforcing bar 5 crisscross setting in vertical section 6 can improve the structural strength of vertical section 6 itself like this, can also increase the area of contact of being connected between reinforcing bar and the vertical section 6 simultaneously, improves the joint strength between vertical section 6 and existing structure and the new construction.
In order to improve the structural strength of L type lintel, the utility model discloses in, L type lintel formula structure as an organic whole. The specific structure of L type lintel is: set up the steel reinforcement fossil fragments according to the design size of L type lintel, erect the steel reinforcement fossil fragments and connect into the node of existing structure and new construction, after the reinforcing bar that exposes existing structure and new construction is fixed well for this steel reinforcement fossil fragments, be about to the reinforcing bar that the existing structure exposes and new construction reinforcing bar after fixed well for this steel reinforcement fossil fragments, pour the concrete through the template to form the L type lintel of integral type structure.
In order to improve the stability of the side wall structure when the side wall opening 2 of the existing structure is constructed, the reinforcing structure further comprises a newly-arranged structural column 16. Newly establish structure post 16 and be provided with two, newly establish structure post 16 and set up respectively at the both ends of existing structure side wall entrance to a cave 2 for two, promptly: after the construction of the structural side wall opening 2 is completed, under the main viewing angle, two newly-arranged structural columns 16 are positioned at two sides of the structural side wall opening 2. The top ends of the two newly-arranged structural columns 16 are connected with the L-shaped lintel, and the newly-arranged structural columns 16 also have a supporting effect on the L-shaped lintel.
Further, the steel bars of the newly-built structural columns 16 are connected with the existing structure through embedded steel bars, and the steel bars of the existing structure side walls are reserved in the lower ends of the newly-built structural columns 16, so that the connection reliability of the newly-built structural columns 16 and the side walls is enhanced. The steel bars of the existing structural side wall are the steel bars in the existing structural side wall reserved when the side wall is provided with the newly-established structural column construction hole 12. It should be noted that, the newly-established structural columns 16 and the L-shaped lintel are connected with the reinforcing steel bars of the side wall of the existing structure, but the differences are that: the structural side wall reinforcing steel bars connected with the newly-installed structural columns 16 are reinforcing steel bars exposed when the newly-installed structural column construction openings 12 are formed, and are located at the lower portions of the newly-installed structural column construction openings 12, while the existing structural side wall reinforcing steel bars connected with the L-shaped lintel are reinforcing steel bars exposed when the L-shaped lintel construction openings 14 are formed, and are located at the upper portions of the L-shaped lintel construction openings 14.
The length of the existing structure side wall steel bars in the newly-arranged structure column 16 is 35d to 37d, wherein d is the diameter of the existing side wall steel bars. The length of the existing structural side wall steel bars in the newly-built structural columns 16 is preferably 35d, and the 35d is calculated according to 335 steel bars. Different engineering steel bar models and concrete grades are obstructed, the anchoring lengths are different, however, the setting length of the steel bar of the existing structural side wall in the newly-established structural column meets the requirement of the steel bar anchoring length in the concrete design specification, and the setting length is not less than 200 mm.
The reinforced structure also comprises a plurality of temporary supports which are arranged in the horizontal section at intervals. After the L-shaped lintel is formed, a plurality of temporary supports are arranged in the horizontal section 6 of the L-shaped lintel at intervals.
In the horizontal direction, the supporting holes 13 are drilled in an interval mode, namely, the positions of L-shaped lintels are constructed on the side walls, the side walls with the existing structures are broken at intervals, the positions of the broken side walls are called the supporting holes 13, at least one group of temporary supports are arranged in each supporting hole 13, each temporary support comprises two supporting units, each supporting unit comprises a bottom plate 9, a supporting tube 10 and a top plate 11, and the supporting tubes 10 are arranged between the bottom plate 9 and the top plate 11. The two bottom plates 9 in the two supporting units are in butt joint by adopting single-side V-shaped groove welding, wedge blocks 15 are arranged below the outer sides of the two bottom plates 9 in the two supporting units, and the included angle between the two bottom plates 9 is smaller than 180 degrees. The included angle between the two bottom plates 9 is used for ensuring that the top plate 11 is tightly abutted with the top surface of the supporting opening 13 after the wedge block 15 is driven into the side edge of the bottom plate 9 during supporting. If looseness occurs, stability of the support unit support can be ensured by continuing to drive the wedge 15. When the wedge block 15 is driven in, the bottom plates 9 move upwards, the included angle between the two bottom plates 9 is correspondingly reduced, and finally the top plate 11 is tightly abutted to the supporting hole 13. After the wedge 15 is driven, the force exerted by the wedge 15 on the base plate 9 has a horizontal component which is capable of holding the two support units together tightly, since the angle between the floors is less than 180 °.
Specifically, a plurality of anchor bolt holes 18 are formed in the top plate 11, the lower ends of anchor bolts 17 are arranged in the anchor bolt holes 18, the upper ends of the anchor bolts 17 are anchored in the top plate 11 of the existing structure, and the anchor bolts 17 are arranged to anchor the top plate 11 of the supporting unit in the top plate 1 of the existing structure. Further, the top plate 11 is a rectangular structure, and four anchor bolt holes 18 are provided on each top plate 11, and the four anchor bolt holes 18 are respectively provided in four corners of the top plate 11.
The reinforcing method of the reinforcing structure by utilizing the existing structure to open the hole and the new structure connection node comprises the following steps:
firstly, breaking wall concrete of a side wall according to the construction range of the L-shaped lintel; step two, arranging an L-shaped lintel at the broken part of the side wall, realizing the connection between the existing structure and the new structure through the L-shaped lintel, and supporting the existing structure through the L-shaped lintel; and step three, continuously breaking the wall concrete of the side wall and forming a side wall hole of the existing structure.
And according to the construction design, opening the hole of the existing structure before the new structure is constructed. The hole forming is particularly that holes are formed in the side wall of the existing structure according to the construction range of the L-shaped lintel, and therefore the temporary support is installed and the L-shaped lintel is arranged.
Specifically, L type lintel is including vertical section 6 and horizontal segment 7, and vertical section 6 sets up between new construction roof 4 and existing structure roof 1, and horizontal segment 7 sets up in the bottom of vertical section 6 to the setting is in the lower part of existing structure roof 1.
In the conventional technology, the holing of the side wall of the existing structure is to remove the side wall of the existing structure as a whole, or to remove the side wall of the existing structure in a large area to form a hole.
The utility model discloses in, the side wall operation of opening a hole to existing structure lies in with prior art's difference: around existing structure side wall entrance to a cave, remain the inside partial reinforcing bar of existing structure roof 1 and side wall (being located near the reinforcing bar of entrance to a cave), its aim at carries out fixed connection through partial reinforcing bar that remains and vertical section 6 and horizontal segment 7, realizes the connection of existing structure and new construction and the bearing support of opening the hole position through vertical section 6 and horizontal segment 7.
In the above operation, the vertical section 6 is provided between the existing structure roof 1 and the new structure roof 4, and the vertical section 6 is used to realize the butt joint between the existing structure roof 1 and the new structure roof 4. The vertical section 6 is fixedly connected with the existing structure and the new structure (the vertical section 6 is fixedly connected with the steel bars of the new structure and the steel bars of the existing structure), so that the vertical section 6 can maintain the connection strength and the connection stability relative to the existing structure and the new structure.
L type lintel includes vertical section 6 and horizontal segment 7, horizontal segment 7 sets up in the upper end department of existing structure side wall entrance to a cave 2 and is connected with the lower terminal surface of existing structure roof 1, and link to each other with existing structure side wall reinforcing bar 8 that existing structure roof 1 lower extreme was kept, support existing structure roof 1 by horizontal segment 7, and bear the shearing force that comes from existing structure roof 1, in order to keep the stability of existing structure roof 1 structure, avoid its local emergence structure to destroy or even the appearance of the problem of collapsing.
In the following description, the reinforcing bars in the existing structure top plate 1 are referred to as existing structure top plate reinforcing bars 3, the reinforcing bars in the new structure top plate 4 are referred to as new structure top plate reinforcing bars 5, and the reinforcing bars in the existing structure side wall are referred to as existing structure side wall reinforcing bars 8.
In order to improve the stability of the side wall structure when the side wall opening 2 of the existing structure is constructed, the reinforcing structure further comprises a newly-arranged structural column 16. Newly establish structure post 16 and be provided with two, newly establish structure post 16 and set up respectively at the both ends of existing structure side wall entrance to a cave 2 for two, promptly: after the construction of the structural side wall opening 2 is completed, under the main viewing angle, two newly-arranged structural columns 16 are positioned at two sides of the structural side wall opening 2. The top ends of the two newly-arranged structural columns 16 are connected with the L-shaped lintel, and the newly-arranged structural columns 16 also have a supporting effect on the L-shaped lintel.
Further, the existing structure side wall steel bars 8 are reserved in the lower ends of the newly-arranged structure columns 16. Preferably, the length of the existing structure side wall steel bar 8 in the newly-built structural column 16 is 90mm-100mm, so that the stability of the newly-built structural column 16 is improved.
The utility model discloses in, set up the L type lintel of L shape between the node of plugging into of existing structure and new construction, L type lintel is connected into whole with existing structure roof 1 through L type lintel with new construction roof 4 including vertical section 6 and horizontal segment 7, and simultaneously, the horizontal segment 7 of L type lintel can also support, consolidate the position of opening a hole of existing structure. Further, the horizontal section 7 in the L-shaped lintel is horizontally arranged and is positioned at the bottom of the existing structure top plate 1 and used for bearing the shearing force transmitted by the existing structure top plate 1, so that the stability of the structure after the existing structure is holed is ensured. Vertical section 6 vertical setting of L type lintel, vertical section 6 set up between existing structure roof 1 and new construction roof 4, have realized plugging into of existing structure and new construction promptly, have undertaken the moment of flexure that both sides roof load produced again, effectively guarantee structural safety. The utility model discloses remain the partial reinforcing bar of existing structure roof 1 and side wall, go into the fixed connection that L type lintel realized existing structure and L type lintel through the reinforcing bar anchor, this scheme has reduced the crack at connection position effectively, reduces the risk of percolating water when using. Meanwhile, the same reinforcing steel bar anchoring and fixing scheme is adopted between the L-shaped lintel and the new structure top plate 4, so that the risk of water leakage in use is reduced while connection between the existing structure and the new structure is realized.
Compared with the prior art, the utility model discloses need not increase higher joist in existing structure roof 1's bottom, just so can increase the size of opening a hole, guarantee building function, the utility model discloses also need not set up the movement joint, can reduce the condition emergence of percolating water, it is littleer to the influence of existing track line under the condition of guaranteeing structure safety, guarantees subway safety operation. The utility model discloses can open the hole position to the side wall and carry out the reinforcement safely, guarantee the rigid connection of the node of plugging into, reduce the risk of percolating water from now on, increase the height at the hole position (existing structure side wall entrance to a cave 2) is opened to the side wall, the better pipeline arrangement that satisfies. Compared with the prior construction technical scheme, the construction method is safer and has stronger practicability.
Specifically, in the present invention, the operation of step one is as follows, including: a, according to the construction range of the L-shaped lintel, breaking wall concrete of the side wall in an interval breaking mode, forming a support opening 13 for arranging temporary supports, and arranging the temporary supports in the support opening 13; and step one, breaking the residual wall concrete in the construction range of the L-shaped lintel and forming an L-shaped lintel construction hole 14.
In the first step, the side wall of the existing structure is bored according to the construction range of the L-shaped lintel, the boring size of the side wall of the existing structure is smaller than the design size according to the design, after the boring operation of the support opening 13 is finished, a temporary support is arranged in the support opening 13, then the existing structure at the edge of the opening 2 of the side wall of the existing structure is roughened, so that part of reinforcing steel bars of the top plate 1 of the existing structure and the side wall of the existing structure close to the opening are exposed, the exposed reinforcing steel bars are the reinforcing steel bars of the top plate 1 of the existing structure anchored into the side wall, and the length of the exposed reinforcing steel bars meets the anchoring length requirement of the vertical section of the L-shaped lintel. And holes are formed in the side wall of the existing structure, so that the side wall steel bars 8 of the existing structure are exposed, and the top plate steel bars 3 of the existing structure are exposed.
In the first step, the wall concrete of the side wall is broken by adopting an interval breaking mode to form a supporting opening 13, which specifically means: in the design range of the L-shaped lintel, wall concrete is broken by adopting a mode of opening holes at intervals along the length direction of the L-shaped lintel (namely the arrangement range of the horizontal section 7), and a certain distance is reserved between the formed supporting holes 13. For example, in an embodiment of the present invention, the width of the single supporting hole 13 in the horizontal direction is 1000mm, and the distance between two adjacent supporting holes 13 may be 1.5-2.0 times, and preferably 1.5 times, that of the supporting hole 13, that is, 1500 mm. Of course, the width of the supporting holes 13 and the distance between the supporting holes 13 can be designed according to the length of the L-shaped lintel so as to meet the requirement that the supporting holes 13 are arranged at equal intervals in the design range of the L-shaped lintel.
The utility model discloses preferably adopt the interval to abolish the partial wall body concrete that the mode got rid of existing structure lateral wall, can form like this and strut entrance to a cave 13, strut every check longitudinal length of entrance to a cave 13 and be 1m, two adjacent intervals of strutting between the entrance to a cave 13 are 1 m. In the supporting opening 13, temporary section steel is used as vertical temporary support of the top plate after the hole is opened.
The reinforced structure comprises a plurality of temporary supports, and after the L-shaped lintel is formed, the plurality of temporary supports are arranged in the horizontal section 6 of the L-shaped lintel at intervals.
In the horizontal direction, the supporting holes 13 are drilled in an interval mode, namely, the positions of L-shaped lintels are constructed on the side walls, the side walls with the existing structures are broken at intervals, the positions of the broken side walls are called the supporting holes 13, at least one group of temporary supports are arranged in each supporting hole 13, each temporary support comprises two supporting units, each supporting unit comprises a bottom plate 9, a supporting tube 10 and a top plate 11, and the supporting tubes 10 are arranged between the bottom plate 9 and the top plate 11. The two bottom plates 9 in the two supporting units are in butt joint by adopting single-side V-shaped groove welding, wedge blocks 15 are arranged below the outer sides of the two bottom plates 9 in the two supporting units, and the included angle between the two bottom plates 9 is smaller than 180 degrees. After the wedge 15 is driven, the force exerted by the wedge 15 on the base plate 9 has a horizontal component which is capable of holding the two support units together tightly, since the angle between the floors is less than 180 °.
Specifically, a plurality of anchor bolt holes 18 are formed in the top plate 11, the lower ends of the anchor bolts 17 are arranged in the anchor bolt holes 18, and the upper ends of the anchor bolts 17 are anchored in the top plate 11 of the existing structure. Further, the top plate 11 is a rectangular structure, and four anchor bolt holes 18 are provided on each top plate 11, and the four anchor bolt holes 18 are respectively provided in four corners of the top plate 11.
Please refer to fig. 12 to 14, wherein fig. 12 is a schematic structural view of a temporary support according to an embodiment of the present invention; fig. 13 is a side view of a temporary support in an embodiment of the invention; fig. 14 is a top view of a temporary support in an embodiment of the invention.
The concrete structure of temporary support is as follows: constitute by two support unit, support unit is including bottom plate 9, stay tube 10 (rectangle steel pipe) and roof 11, bottom plate 9 is placed on the bottom surface of strutting entrance to a cave 13, stay tube 10 sets up between bottom plate 9 and roof 11, bottom plate 9 and roof 11 adopt the rectangular plate structure, stay tube 10, coaxial setting between bottom plate 9 and the roof 11, roof 11 withstands the top surface of strutting entrance to a cave 13, in two support unit, adopt unilateral V-arrangement groove welding to realize the butt joint between two bottom plates 9, the outside limit of bottom plate 9 is realized tightening through voussoir 15.
Specifically, the wedge 15 is a steel wedge.
Specifically, the utility model discloses step two has been carried out after step one, and step two's specific operation is as follows: step two, binding L-shaped lintel steel bars in the L-shaped lintel construction opening 14, wherein the L-shaped lintel steel bars are connected with a top plate of the existing structure by using embedded bars; and step two, pouring an L-shaped beam concrete structure, and carrying out mud jacking construction between the L-shaped beam and the top plate.
After the supporting opening 13 is supported, the remaining wall concrete is broken according to the construction range of the L-shaped lintel to form an L-shaped lintel construction opening 14. And arranging the L-shaped lintel in the L-shaped lintel construction hole 14 according to the steps.
Specifically, the utility model discloses step three has been carried out after step two, step three's specific operation as follows: thirdly, breaking the remaining wall concrete of the side wall within the design range of the side wall opening of the existing structure, and forming the side wall opening of the existing structure; and thirdly, cutting off the redundant part of the temporary support in the range of the side wall hole of the existing structure.
When butt joint of the new structure roof and the L-shaped lintel is carried out, firstly, the new structure roof steel bars 5 are exposed, and the exposed new structure roof steel bars 5 are connected with the L-shaped lintel steel bars. The above-mentioned exposure of the new structure roof reinforcing steel bars 5 means that a part of reinforcing steel bars at a part where the new structure roof 4 is connected with the existing structure is exposed.
Through the new construction roof reinforcing bar 5 and the connection of L type lintel steel bar that will expose, realize that new construction roof reinforcing bar 5 anchors into vertical section 6, can provide the secondary to vertical section 6 and fix. After the exposed new structure roof reinforcing steel bars 5 are anchored into the vertical section 6, concrete is poured into the gap between the vertical section 6 and the roof 1 between the existing structures and the gap between the vertical section 6 and the new structure roof 4, so that seamless connection between the vertical section 6 and the existing structures and between the new structures is realized, and the sealing performance (waterproofness) and the connection strength of the connection node are improved.
After being connected new construction roof reinforcing bar 5 and L type lintel steel bar, pour the reinforcing bar of vertical section 6 and new construction roof 4 simultaneously to be connected with existing structure 1, make new and old structure effective connection through the chisel hair, improve the leakproofness (waterproof nature) and the joint strength of plugging into the node.
In the second step, the exposed side wall steel bars 8 of the existing structure are connected with the L-shaped lintel steel bars, and after the pouring of the L-shaped lintel concrete body structure is finished, the anchoring of the side wall steel bars 8 of the existing structure in the horizontal section 7 can be realized. Through the second step, the connection between the side wall of the existing structure and the horizontal section 7 can be realized, and the reinforcement of the horizontal section 7 on the side wall of the existing structure is improved.
The utility model discloses in, still including presetting the step before step one: performing wall concrete breaking on the side wall according to the design position of the newly-arranged structural column 16, and forming a newly-arranged structural column construction hole 12; binding a newly-arranged structural column 16 steel bar in the newly-arranged structural column construction hole 12; and pouring a concrete structure of the newly-arranged structural column 16. The wall columns are arranged on two sides of the existing structure side wall opening 2, the structural stability of the opening can be improved, and meanwhile, the vertical section 6 and the horizontal section 7 can be reinforced. The pilasters can also reduce the span of the L-shaped lintel, providing support for the L-shaped lintel.
In order to ensure the safety of the existing structure, the side wall breaking construction preferably adopts static cutting for construction, the steel bar range is required to be reserved and manually broken, and the mechanical breaking construction with larger vibration is strictly forbidden. When a plurality of trompils of one side wall are under construction, should the interval carry out the transformation construction, adjacent trompil time interval should satisfy the trompil pouring structure and satisfy 80% design value intensity.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a reinforced structure of existing structure division hole and new construction joint of plugging into which characterized in that includes:
the structure comprises an existing structure, a side wall and a top plate of the existing structure, wherein the top plate of the existing structure is connected with the top end of the side wall, a hole opening part of the side wall is formed with an opening of the side wall of the existing structure, and reinforcing steel bars of the top plate of the existing structure are arranged in the top plate of the existing structure;
the novel structure comprises a novel structure top plate, and novel structure top plate steel bars are arranged in the novel structure top plate;
the L-shaped lintel comprises a vertical section and a horizontal section, wherein the horizontal section is connected to the lower end of the vertical section, the vertical section is connected between the existing structure and the new structure, and the horizontal section is connected with the existing structure and used for bearing the existing structure.
2. The reinforcement structure according to claim 1,
and the side wall is internally provided with existing structure side wall reinforcing steel bars, and the existing structure side wall reinforcing steel bars are connected with the horizontal section.
3. The reinforcement structure according to claim 1,
the existing structure top plate and the new structure top plate are respectively connected with the vertical section;
the bottom surface of the existing structure top plate is connected with the horizontal section.
4. The reinforcement structure according to claim 1,
the existing structure roof reinforcing steel bars and the new structure roof reinforcing steel bars are arranged in the vertical section in a staggered mode.
5. The reinforcement structure according to claim 1,
the reinforced structure is still including newly establishing the structural column, newly establishing the structural column and being provided with two, two newly establish the structural column and set up respectively at the both ends of entrance to a cave, two newly establish the top of structural column all with L type lintel is connected.
6. The reinforcement structure of claim 5,
and the steel bars of the newly-established structural columns are connected with the existing structure through embedded steel bars, and the steel bars of the existing structure side walls are reserved in the lower ends of the newly-established structural columns to enhance the reliability of the connection of the newly-established structural columns and the side walls.
7. The reinforcement structure of claim 6, wherein the existing structure side wall rebars within the newly-installed structural columns have a length of 35d to 37d, wherein d is the diameter of the existing side wall rebars.
8. The reinforcement structure according to claim 1,
the reinforced structure also comprises a plurality of temporary supports which are arranged in the horizontal section at intervals,
each temporary support comprises two support units, each support unit comprises a bottom plate, a support pipe and a top plate, the support pipe is arranged between the bottom plate and the top plate,
the two bottom plates in the two supporting units are welded by adopting a single-side V-shaped groove to realize butt joint,
wedge blocks are arranged below the outer sides of the two bottom plates in the two supporting units, and the included angle between the two bottom plates is smaller than 180 degrees.
9. The reinforcement structure according to claim 8,
be provided with a plurality of anchor bolt holes on the roof, the downthehole lower extreme that is used for setting up the crab-bolt of crab-bolt, the upper end anchor of crab-bolt goes into in the existing structure roof.
10. The reinforcement structure according to claim 8,
the top plate is of a rectangular structure, four anchor bolt holes are formed in each top plate, and the four anchor bolt holes are formed in four corners of the top plate respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020349648.0U CN212316988U (en) | 2020-03-18 | 2020-03-18 | Reinforcing structure of existing structure opening and new structure connection node |
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| CN202020349648.0U CN212316988U (en) | 2020-03-18 | 2020-03-18 | Reinforcing structure of existing structure opening and new structure connection node |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111395390A (en) * | 2020-03-18 | 2020-07-10 | 广州地铁设计研究院股份有限公司 | Reinforcing structure and method for existing structure opening and new structure connection node |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111395390A (en) * | 2020-03-18 | 2020-07-10 | 广州地铁设计研究院股份有限公司 | Reinforcing structure and method for existing structure opening and new structure connection node |
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