CN111719883B - Joint structure for reinforcing new and old concrete by increasing section and construction method - Google Patents
Joint structure for reinforcing new and old concrete by increasing section and construction method Download PDFInfo
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- CN111719883B CN111719883B CN202010455232.1A CN202010455232A CN111719883B CN 111719883 B CN111719883 B CN 111719883B CN 202010455232 A CN202010455232 A CN 202010455232A CN 111719883 B CN111719883 B CN 111719883B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0285—Repairing or restoring flooring
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Abstract
The invention relates to the technical field of concrete interface treatment, in particular to a new and old concrete joint structure with an enlarged section and a construction method. Wherein, this new and old concrete handing-over structure is consolidated to increase cross-section includes old concrete layer, bearing wall, coupling mechanism and atress reinforcing bar, and the quantity of bearing wall is two, and a bearing wall sets up in one side on old concrete layer, and another bearing wall sets up the opposite side on old concrete layer, and the bearing wall that coupling mechanism and one side were passed through to the one end of atress reinforcing bar is connected, and the other end of atress reinforcing bar passes through coupling mechanism and is connected with the bearing wall of opposite side. The invention has the following effects: 1. after the new concrete layer is poured, most of stress is applied to the bearing wall, so that the old concrete layer is less in stress and not easy to damage and has long service life; 2. the time of site construction can be saved; 3. the connection of stress reinforcing steel bars and the bearing wall is more stable.
Description
Technical Field
The invention relates to the technical field of concrete interface treatment, in particular to a new and old concrete joint structure with an enlarged section and a construction method.
Background
Currently, concrete structures are the most common structural form in industrial and civil buildings in our country. Concrete reinforcement is gradually developed from the 50 s of the last century, and proper reinforcement technology and method ensure the safety of the existing building structure and prolong the service life of the building structure. In concrete reinforcement practice, the transfer of new and old concrete is one of the most common reinforcement practices. It is common to add new beams and new plates on existing concrete columns; adding new beams and new plates on the existing concrete wall; and a new beam, a new plate and the like are additionally arranged on the existing concrete beam.
With the increasing of the house price, due to the economic consideration, many people can purchase second-hand houses with older building and more economical price than new houses when purchasing houses, when the houses of the second-hand houses with the older building are decorated, because the ground of the houses is stepped on by former users for a long time, the old concrete layer on the ground can crack, the old concrete layer on the ground is usually required to be reinforced, and the new concrete layer is additionally arranged on the surface of the old concrete layer.
In order to make the connection of the new and old concrete joints more stable, the existing construction of the new and old concrete joints is usually to firstly coat an interface treating agent on the joints of the old concrete, then directly tie up stressed steel bars on the upper ends of the joints of the old concrete, build a pouring template, then pour new concrete into the pouring template, and finally remove the pouring template after the concrete reaches the strength, thus completing the addition of a new concrete layer on the old concrete layer.
The above prior art solutions have the following drawbacks: the stressed steel bars are directly tied up at the upper ends of the joint surfaces of the old concrete, most of stress is applied to the old concrete layer after the new concrete layer is poured, and the old concrete layer is easily damaged due to overlarge stress.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a new and old concrete connecting structure with an enlarged section for reinforcing, and the new and old concrete connecting structure has the advantages that after a new concrete layer is poured, the old concrete layer is stressed less and is not easy to damage.
The invention also aims to provide a new and old concrete jointing construction method for reinforcing the cross section, which has the advantages that the old concrete layer is less stressed and is not easy to damage after the new concrete layer is poured.
The above object of the present invention is achieved by the following technical solutions:
the invention relates to a new and old concrete connecting structure for reinforcing an enlarged section, which comprises an old concrete layer, two bearing walls, a connecting mechanism and stressed steel bars, wherein one bearing wall is arranged on one side of the old concrete layer, the other bearing wall is arranged on the other side of the old concrete layer, one end of each stressed steel bar is connected with the bearing wall on one side through the connecting mechanism, and the other end of each stressed steel bar is connected with the bearing wall on the other side through the connecting mechanism.
Through adopting above-mentioned technical scheme, the atress reinforcing bar is connected with the bearing wall, and most atress are all on the bearing wall after the new concrete layer is pour and is accomplished to old concrete layer atress is less, and is not fragile, long service life.
The present invention in a preferred example may be further configured to: the connecting mechanism comprises a connecting seat and a connecting head, the connecting head is fixedly connected with the end part of the stressed steel bar, the connecting seat comprises a mounting plate and a plurality of fixing blocks arranged along the circumferential direction of the mounting plate, and the fixing part sequentially penetrates through the mounting plate and the bearing wall so as to ensure that the mounting plate and the bearing wall are relatively fixed; the fixing blocks can be folded or unfolded relative to the mounting plate, and form a mounting channel for inserting the connector when the fixing blocks are unfolded, and the connector is fixedly inserted into the mounting channel by clamping the clamping component when the fixing blocks are folded.
Through adopting above-mentioned technical scheme, earlier during the installation be connected connecting seat and bearing wall, connector and atress reinforcing bar connection alone, because connecting seat and bearing wall fixed connection, connector and atress reinforcing bar fixed connection, only need be connected connector and connecting seat this moment, just enable the atress reinforcing bar and be in the same place with bearing wall connection. Therefore, the connecting seat can be connected with the bearing wall and the connector is connected with the stressed steel bar in the earlier stage during construction, and the connector is connected with the connecting seat during site construction, so that the time of site construction can be saved.
The present invention in a preferred example may be further configured to: the clamping and fixing assembly comprises a first clamping block and a second clamping block, the first clamping block is arranged on the connecting head, the second clamping block is arranged on the fixing block, and when the fixing block is folded, the second clamping block is used for abutting against one end, deviating from the mounting plate, of the first clamping block when the connecting head is inserted into the mounting plate to be in contact with the mounting plate, so that the connecting head is kept at the position of inserting the mounting channel.
Through adopting above-mentioned technical scheme, the second fixture block can offset with the one end that first fixture block deviates from the mounting panel when the fixed block draws in, and the unable orientation of keeping away from the direction motion of mounting panel of second fixture block this moment, so can make connector and bearing wall keep relatively fixed.
The present invention in a preferred example may be further configured to: the bearing wall is provided with a containing groove for containing the connecting seat, and the fixing piece sequentially penetrates through the mounting plate and the groove wall of the containing groove so that the mounting plate and the bearing wall are relatively fixed.
Through adopting above-mentioned technical scheme, inside new concrete layer grouted the operation and made concrete liquid can get into the holding tank, treat that concrete liquid can make the atress reinforcing bar pour after thoroughly fixing in the holding tank, compare and be connected the wall of atress reinforcing bar and bearing wall, this makes the area of being connected of atress reinforcing bar and bearing wall bigger to the atress reinforcing bar is more stable with being connected of bearing wall.
The present invention in a preferred example may be further configured to: the second fixture block is provided with an inclined surface, and the connector is used for abutting against the inclined surface when being inserted into the accommodating groove so as to enable the fixing block to be opened.
Through adopting above-mentioned technical scheme, when the atress reinforcing bar inserts the holding tank, need not to operate other devices, just can make the fixed block open the atress reinforcing bar of being convenient for and insert the installation passageway automatically, the atress reinforcing bar is comparatively convenient with being connected of bearing wall.
The present invention in a preferred example may be further configured to: an adjusting block is fixedly arranged at one end, close to the mounting plate, of the fixed block, and the adjusting block is used for abutting against the mounting plate when the fixed block is folded and separating from the mounting plate when the fixed block is unfolded; the connector is used for abutting against the adjusting block when being inserted into the mounting channel, and the adjusting block abuts against the mounting plate so that the fixing block is folded.
Through adopting above-mentioned technical scheme, when the connector inserts the installation passageway, can support and press the regulating block, the fixed block draws in when the connector inserts to the regulating block and offsets with the mounting panel, the second fixture block can with the one end that first fixture block deviates from the mounting panel offsets this moment to the connector just can't break away from the installation passageway, keeps inserting the position of installation passageway, and the atress reinforcing bar is connected with the bearing wall promptly this moment, so when having installed the connecting seat in the holding tank of bearing wall, only need insert the holding tank with the atress reinforcing bar, the connecting seat just can make automatically that the atress reinforcing bar keeps relatively fixed with the bearing wall, thereby the atress reinforcing bar is comparatively convenient with being connected of bearing wall.
The present invention in a preferred example may be further configured to: the stress steel bar is composed of at least two steel bar sections, the two adjacent steel bar sections are connected through the connecting sleeve, the connecting sleeve is provided with a cavity, the two ends of the connecting sleeve are respectively provided with an inserting port for inserting the steel bar sections, and the inserting ports are communicated with the cavity; the connecting sleeve comprises two clamping blocks and a driving mechanism, the two clamping blocks are arranged in the cavity, and the two clamping blocks can be relatively close to or far away from each other so as to clamp the reinforcing steel bar sections extending from the inserting ports at the two ends when the two clamping blocks are relatively close to each other and loosen the reinforcing steel bar sections when the two clamping blocks are relatively far away from each other; the driving mechanism is used for driving the two clamping blocks to relatively approach or move away.
Through adopting above-mentioned technical scheme, two grip blocks can be better to the centre gripping of reinforcing bar section connect two reinforcing bar sections, and the accessible is adjusted actuating mechanism simultaneously and is made the distance that two grip blocks are close to relatively change, makes its fixed not unidimensional reinforcing bar section, so connecting sleeve suitability is strong.
The present invention in a preferred example may be further configured to: the driving mechanism comprises a screw rod, a threaded hole is formed in the side wall of the connecting sleeve, the screw rod penetrates through the threaded hole and is in threaded connection with the threaded hole, one end of the screw rod is rotatably connected with one clamping block, and the screw rod is used for being driven to drive the other clamping block to be relatively close to or away from the other clamping block.
Through adopting above-mentioned technical scheme, the screw rod inserts the also corresponding change of degree of depth of cavity when rotating to the distance between the grip block of being connected with the screw rod and another grip block also can change, so only need rotate the screw rod just can adjust the distance between two grip blocks, it is comparatively convenient to adjust.
The present invention in a preferred example may be further configured to: the connecting sleeve comprises a first half cylinder and a second half cylinder, one end of the first half cylinder is hinged with one end of the second half cylinder, and the first half cylinder and the second half cylinder can be opened or closed relatively and are kept relatively fixed through bolts when being closed;
the first half cartridge has a first half cavity and the second half cartridge has a second half cavity, the first half cartridge and the second half cartridge forming the cavity when relatively closed.
Through adopting above-mentioned technical scheme, need not to insert the cavity with the reinforcing bar section from the interface during two adjacent reinforcing bar section connections inside, only need open half first section of thick bamboo and half a section of thick bamboo of second relatively, then make two adjacent reinforcing bar sections be located inside the cavity, close half first section of thick bamboo and half a section of thick bamboo of second relatively again, just enable two reinforcing bar section connections to the connection of reinforcing bar section is comparatively convenient.
The second aim of the invention is realized by the following technical scheme:
the invention relates to a new and old concrete jointing construction method for reinforcing an enlarged section, which comprises the following steps:
(1) performing chiseling treatment on the old concrete layer by adopting a chiseling machine;
(2) connecting the stressed steel bars with a bearing wall arranged on the old concrete layer, and building a pouring template;
(3) and pouring concrete into the pouring template to form a new concrete layer.
Through adopting above-mentioned technical scheme, the atress reinforcing bar is connected with the bearing wall, and most atress are all on the bearing wall after the new concrete layer is pour and is accomplished to old concrete layer atress is less, and is not fragile, long service life.
In summary, the invention includes at least one of the following beneficial technical effects:
1. after the new concrete layer is poured, most of stress is applied to the bearing wall, so that the old concrete layer is less in stress and not easy to damage and has long service life;
2. the time of site construction can be saved;
3. the connection between the stressed steel bars and the bearing wall is more stable;
4. the connection of the stressed steel bars and the bearing wall is more convenient;
5. the connection of two adjacent reinforcing bar sections is comparatively convenient.
Drawings
Fig. 1 is a partial structural view illustrating a connection between a load-bearing wall and a load-bearing reinforcing bar for reinforcing a joint structure of new and old concrete with an increased cross section according to an embodiment of the present invention.
Fig. 2 is a schematic structural view illustrating a fixed member being folded when a stressed steel bar is connected to a connecting mechanism according to an embodiment of the present invention.
Fig. 3 is a schematic view of the assembly relationship between the stressed steel bar and the connecting mechanism in fig. 2.
Fig. 4 is a schematic structural view illustrating the expansion of the fixing member when the stressed steel bar is connected with the connecting mechanism according to an embodiment of the invention.
Fig. 5 is a schematic view of the assembly relationship between the stressed steel bar and the connecting mechanism in fig. 4.
Fig. 6 is a partial structural schematic view of two adjacent reinforcement bar segments connected by a connecting sleeve according to an embodiment of the present invention.
Fig. 7 is a cross-sectional view taken at a-a in fig. 6.
Fig. 8 is a cross-sectional view at B-B in fig. 6.
In the figure, 1, an old concrete layer; 2. a load-bearing wall; 3. a connecting mechanism; 31. a connecting seat; 311. mounting a plate; 312. a fixed block; 32. a connector; 4. stressed steel bars; 41. a steel bar section; 5. a fixing member; 6. a clamping component; 61. a first clamping block; 62. a second fixture block; 7. installing a channel; 8. a connecting sleeve; 81. a clamping block; 82. a drive mechanism; 821. a screw; 83. a first half cylinder; 84. a second half cartridge; 9. A bevel; 10. an adjusting block; 11. accommodating grooves; 12. a cavity; 121. a first half-cavity; 122. a second cavity half; 13. an interface; 14. a threaded bore.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the new and old concrete connecting structure for reinforcing the cross section of the new and old concrete comprises two old concrete layers 1, two bearing walls 2, two connecting mechanisms 3 and a plurality of stress steel bars 4, wherein one bearing wall 2 is arranged on one side of the old concrete layer 1, the other bearing wall 2 is arranged on the other side of the old concrete layer 1, one end of each stress steel bar 4 is connected with the bearing wall 2 on one side through the connecting mechanism 3, the other end of each stress steel bar 4 is connected with the bearing wall 2 on the other side through the connecting mechanism 3, the number of the stress steel bars 4 is multiple, and the stress steel bars 4 are arranged side by side. Because the stress reinforcing steel bars 4 are connected with the bearing wall 2, most of stress is on the bearing wall 2 after the new concrete layer is poured, so that the old concrete layer 1 is low in stress and not easy to damage, and the service life is long.
Regarding the concrete connection mode of the stressed steel bars 4 and the bearing wall 2, the joint structure for reinforcing the new and old concrete with the increased cross section further comprises a fixing member 5 and a clamping and fixing component 6, the connecting mechanism 3 comprises a connecting seat 31 and a connecting head 32, referring back to fig. 1, the bearing wall 2 is provided with a receiving groove 11 for receiving the connecting seat 31, the receiving groove 11 can be drilled out by a drilling machine during concrete construction, as shown in fig. 2 and 3, the fixing member 5 can be a screw, and the fixing member 5 sequentially penetrates through the mounting plate 311 and the groove wall of the receiving groove 11, so that the mounting plate 311 and the bearing wall 2 are relatively fixed. The new concrete layer of event grout the operation and make inside concrete liquid can get into holding tank 11, wait to make the atress reinforcing bar 4 pour after the concrete liquid dries out and fix in holding tank 11, compare with the wall with atress reinforcing bar 4 and bearing wall 2 and be connected, this makes the area of being connected of atress reinforcing bar 4 and bearing wall 2 bigger to atress reinforcing bar 4 is more stable with being connected of bearing wall 2.
As shown in fig. 3 or fig. 5, the connector 32 is fixedly connected to the end of the stressed steel bar 4, the fixed connection manner may be welding, the connecting seat 31 includes a mounting plate 311 and a plurality of fixing blocks 312 circumferentially disposed along the mounting plate 311, the fastening assembly 6 includes a first fastening block 61 and a second fastening block 62, the first fastening block 61 is disposed on the connector 32, the first fastening block 61 and the connector 32 may be welding, the second fastening block 62 is disposed on the fixing block 312, and the second fastening block 62 and the fixing block 312 may be welding. Each fixing block 312 may be provided with one second block 62, and the number of the first blocks 61 is the same as that of the second blocks 62 and corresponds to one another. The fixing blocks 312 can be folded or unfolded relative to the mounting plate 311, the first latch 61 and the second latch 62 can be triangular, that is, the second latch 62 has an inclined surface 9, and the connector 32 is used for pressing the inclined surface 9 when being inserted into the receiving groove 11 (not shown), so as to unfold the fixing blocks 312. The fixing blocks 312 form an installation channel 7 for inserting the connector 32 when being opened, and when the fixing blocks 312 are folded, the second latch 62 abuts against one end of the first latch 61 departing from the installation plate 311 when the connector 32 is inserted to be in contact with the installation plate 311, so that the connector 32 is kept at the position inserted into the installation channel 7.
Preferably, as shown in fig. 3 and 5, an adjusting block 10 is fixedly disposed at one end of the fixing block 312 close to the mounting plate 311, the adjusting block 10 and the fixing block 312 may be integrally formed or welded, and the adjusting block 10 is used for abutting against the mounting plate 311 when the fixing block 312 is folded and being separated from the mounting plate 311 when the fixing block 312 is unfolded; the connector 32 is used for pressing the adjusting block 10 when being inserted into the mounting channel 7 until the adjusting block 10 abuts against the mounting plate 311, so that the fixing block 312 is folded. That is, when the connector 32 is inserted into the receiving groove 11, as shown in fig. 4, the inclined surface 9 of the second engaging block 62 is firstly pressed to open the fixing block 312, the adjusting block 10 is separated from the mounting plate 311, and as the connector 32 is continuously inserted, the connector 32 is pressed against the adjusting block 10, when the adjusting block 10 is pressed against the mounting plate 311, since the adjusting block 10 is fixedly connected with the fixing block 312, the fixing block 312 is correspondingly moved to a folded state, as shown in fig. 2, when the fixing block 312 is folded, the second engaging block 62 is pressed against an end of the first engaging block 61 away from the mounting plate 311, so that the connector 32 cannot be separated from the mounting channel 7, and is kept at a position inserted into the mounting channel 7, at this time, the stressed steel bar 4 is connected with the bearing wall 2, so that when the connecting seat 31 is already installed in the receiving groove 11 of the bearing wall 2, only the stressed steel bar 4 is inserted into the receiving groove 11, the connecting seat 31 can automatically keep the stress steel bar 4 and the bearing wall 2 relatively fixed, so that the stress steel bar 4 and the bearing wall 2 can be conveniently connected.
The stress reinforcing steel bar 4 is composed of at least two reinforcing steel bar sections 41, and in concrete construction, different reinforcing steel bar sections 41 are connected with different bearing walls 2 on two sides of the old concrete layer 1 in the mode, then the two adjacent reinforcing steel bar sections 41 are connected by using the connecting sleeve 8, and when all the reinforcing steel bar sections 41 are connected, the stress reinforcing steel bar 4 can be connected with the bearing walls 2. Regarding the specific arrangement of the connection of two adjacent reinforcement sections 41, as shown in fig. 6 or fig. 7, the connecting sleeve 8 has a cavity 12, the two ends of the connecting sleeve 8 are respectively provided with a socket 13 for inserting the reinforcement sections 41, and the sockets 13 are both communicated with the cavity 12. The connecting sleeve 8 comprises two clamping blocks 81 and a driving mechanism 82, the number of the clamping blocks 81 is two, the two clamping blocks 81 are arranged in the cavity 12, and the two clamping blocks 81 can be relatively close to or far away from each other so as to clamp the reinforcing steel bar sections 41 extending from the insertion ports 13 at the two ends when the two clamping blocks are relatively close to each other and loosen the reinforcing steel bar sections 41 when the two clamping blocks are relatively far away from each other. Two grip blocks 81 can be better to the centre gripping of reinforcing bar section 41 connect two reinforcing bar sections 41, and the distance between two grip blocks 81 simultaneously can change to can fix not unidimensional reinforcing bar section 41, so 8 suitability of this connecting sleeve is strong.
As shown in fig. 7, the driving mechanism 82 is configured to drive the two clamping blocks 81 to relatively approach or move away from each other, the driving mechanism 82 includes a screw 821, the side wall of the connecting sleeve 8 is provided with a threaded hole 14, the screw 821 passes through the threaded hole 14 and is in threaded connection with the threaded hole 14, one end of the screw 821 is rotatably connected to one of the clamping blocks 81, and the screw 821 is configured to be driven to drive one of the clamping blocks 81 to relatively approach or move away from the other clamping block 81. When the screw 821 is rotated, the depth of the screw 821 inserted into the cavity 12 is also changed correspondingly, so that the distance between the clamping block 81 connected with the screw 821 and the other clamping block 81 is also changed, the distance between the two clamping blocks 81 can be adjusted only by rotating the screw 821, and the adjustment is convenient.
Finally, as shown in fig. 8, the connecting sleeve 8 comprises a first half cylinder 83 and a second half cylinder 84, one end of the first half cylinder 83 and one end of the second half cylinder 84 are hinged, the first half cylinder 83 and the second half cylinder 84 can be opened or closed relatively, and are kept relatively fixed by bolts when closed; the first cartridge half 83 has a first cavity half 121 and the second cartridge half 84 has a second cavity half 122, the first cartridge half 83 and the second cartridge half 84 forming the cavity 12 when relatively closed. Therefore, when two adjacent steel bar sections 41 are connected, the steel bar sections 41 do not need to be inserted into the cavity 12 from the insertion port 13, only the first half cylinder 83 and the second half cylinder 84 need to be opened relatively, then the two adjacent steel bar sections 41 are positioned in the cavity 12, and the first half cylinder 83 and the second half cylinder 84 are closed relatively, so that the two steel bar sections 41 are connected, and the connection of the steel bar sections 41 is convenient.
The implementation principle of the embodiment is as follows: when the interface treatment of new and old concrete is performed, the old concrete layer 1 is first chiseled, then the reinforcing bar segment 41 with the end portion fixedly provided with the connector 32 is inserted into the receiving groove 11 of the bearing wall 2 mounted with the connecting socket 31, when the connector 32 is inserted into the receiving slot 11, it will first press the inclined surface 9 of the second latch 62 to open the fixing block 312, at this time, the adjusting block 10 will be separated from the mounting plate 311, as the connector 32 continues to be inserted, the connector 32 will press the adjusting block 10, when the adjusting block 10 is pressed to be pressed against the mounting plate 311, because the adjusting block 10 is fixedly connected with the fixed block 312, at this time, the fixed block 312 is correspondingly moved to be in a folded state, when the fixing block 312 is in the closed state, the second latch 62 will abut against the end of the first latch 61 away from the mounting plate 311, so that the connector 32 cannot be detached from the mounting passage 7 and is kept inserted into the mounting passage 7. Then, the first half cylinder 83 and the second half cylinder 84 are opened relatively, then the two adjacent steel bar sections 41 are positioned in the cavity 12, the first half cylinder 83 and the second half cylinder 84 are closed relatively, the screw 821 is adjusted to enable the clamping block 81 to clamp the two steel bar sections 41, so that the two steel bar sections 41 can be connected, and the connection of the steel bar sections 41 is convenient. Because the stress reinforcing steel bar 4 is formed by connecting at least two reinforcing steel bar sections 41, the stress reinforcing steel bar 4 is formed after the reinforcing steel bar sections 41 are completely connected, and the stress reinforcing steel bar 4 is connected with the bearing wall 2, most of stress is on the bearing wall 2 after the new concrete layer is poured, so that the old concrete layer 1 is small in stress and not easy to damage, and the service life is long.
The invention relates to a new and old concrete jointing construction method for reinforcing an enlarged section, which comprises the following steps:
(1) performing chiseling treatment on the old concrete layer 1 by adopting a chiseling machine;
(2) connecting the stressed steel bars 4 with the bearing wall 2 arranged on the old concrete layer 1, and building a pouring template;
(3) and pouring concrete into the pouring template to form a new concrete layer.
The implementation principle of the embodiment is as follows: need not to paint interface treatment agent during the construction, it is comparatively convenient to be under construction, simultaneously through making atress reinforcing bar 4 be connected with bearing wall 2, most atress all are on bearing wall 2 after the new concrete layer is pour to old concrete layer 1 atress is less, and is not fragile, long service life.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. The utility model provides a new and old concrete handing-over structure is consolidated to increase cross-section which characterized in that: the concrete-bearing wall comprises two old concrete layers (1), two bearing walls (2), two connecting mechanisms (3) and two stressed steel bars (4), wherein one bearing wall (2) is arranged on one side of the old concrete layer (1), the other bearing wall (2) is arranged on the other side of the old concrete layer (1), one end of each stressed steel bar (4) is connected with the bearing wall (2) on one side through the connecting mechanism (3), and the other end of each stressed steel bar (4) is connected with the bearing wall (2) on the other side through the connecting mechanism (3);
the connecting mechanism (3) comprises a connecting seat (31) and a connecting head (32), the connecting head (32) is fixedly connected with the end part of the stressed steel bar (4), the connecting seat (31) comprises a mounting plate (311) and a plurality of fixing blocks (312) arranged along the circumferential direction of the mounting plate (311), and the fixing piece (5) sequentially penetrates through the mounting plate (311) and the bearing wall (2) so that the mounting plate (311) and the bearing wall (2) are kept relatively fixed;
the fixing blocks (312) can be folded or unfolded relative to the mounting plate (311), and form a mounting channel (7) for inserting the connector (32) when the fixing blocks are unfolded, and the connector (32) is clamped and inserted into the mounting channel (7) through the clamping component (6) when the fixing blocks are folded.
2. An enlarged cross-section reinforced old and new concrete interface structure as recited in claim 1, wherein: the clamping and fixing component (6) comprises a first clamping block (61) and a second clamping block (62), the first clamping block (61) is arranged on the connector (32), the second clamping block (62) is arranged on the fixing block (312), when the fixing block (312) is folded, the second clamping block (62) is used for being inserted into the connector (32) to be in contact with the mounting plate (311), and the end, deviating from the mounting plate (311), of the first clamping block (61) is abutted to enable the connector (32) to be kept at the position where the mounting channel (7) is inserted.
3. An enlarged cross-section reinforced old and new concrete interface structure as recited in claim 2, wherein: the bearing wall (2) is provided with a containing groove (11) used for containing the connecting seat (31), and the fixing piece (5) sequentially penetrates through the mounting plate (311) and the groove wall of the containing groove (11) so that the mounting plate (311) and the bearing wall (2) are relatively fixed.
4. An enlarged cross-section reinforced old and new concrete interface structure as recited in claim 3, wherein: the second fixture block (62) is provided with an inclined surface (9), and the connector (32) is used for abutting against the inclined surface (9) when being inserted into the accommodating groove (11) so as to open the fixing block (312).
5. An enlarged cross-section reinforced old and new concrete interface structure as recited in claim 4, wherein: an adjusting block (10) is fixedly arranged at one end, close to the mounting plate (311), of the fixing block (312), and the adjusting block (10) is used for abutting against the mounting plate (311) when the fixing block (312) is folded and is separated from the mounting plate (311) when the fixing block (312) is unfolded;
the connector (32) is used for pressing the adjusting block (10) to be abutted against the mounting plate (311) when being inserted into the mounting channel (7), so that the fixing block (312) is folded.
6. An enlarged cross-section reinforced old and new concrete interface structure according to any one of claims 1 to 5, wherein: the stress steel bar is characterized by further comprising a connecting sleeve (8), the stress steel bar (4) is composed of at least two steel bar sections (41), the two adjacent steel bar sections (41) are connected through the connecting sleeve (8), the connecting sleeve (8) is provided with a cavity (12), two ends of the connecting sleeve (8) are respectively provided with a socket (13) for the steel bar sections (41) to be inserted into, and the sockets (13) are communicated with the cavity (12);
the connecting sleeve (8) comprises two clamping blocks (81) and a driving mechanism (82), the two clamping blocks (81) are arranged in the cavity (12), and the two clamping blocks (81) can be relatively close to or far away from each other so as to clamp the reinforcing steel bar sections (41) extending from the insertion ports (13) at the two ends when the two clamping blocks are relatively close to each other and release the reinforcing steel bar sections (41) when the two clamping blocks are relatively far away from each other; the driving mechanism (82) is used for driving the two clamping blocks (81) to relatively close to or far away from each other.
7. An enlarged cross-section reinforced old and new concrete interface structure as recited in claim 6, wherein: the driving mechanism (82) comprises a screw rod (821), a threaded hole (14) is formed in the side wall of the connecting sleeve (8), the screw rod (821) penetrates through the threaded hole (14) and is in threaded connection with the threaded hole (14), one end of the screw rod (821) is in rotary connection with one clamping block (81), and the screw rod (821) is used for driving one clamping block (81) to be relatively close to or far away from the other clamping block (81).
8. An enlarged cross-section reinforced old and new concrete interface structure as recited in claim 7, wherein: the connecting sleeve (8) comprises a first half cylinder (83) and a second half cylinder (84), one end of the first half cylinder (83) and one end of the second half cylinder (84) are hinged, and the first half cylinder (83) and the second half cylinder (84) can be opened or closed relatively and are kept relatively fixed through bolts when being closed;
the first half-cylinder (83) has a first half-cavity (121), the second half-cylinder (84) has a second half-cavity (122), and the first half-cylinder (83) and the second half-cylinder (84) form the cavity (12) when closed relatively.
9. A construction method for reinforcing a new and old concrete joint structure based on an enlarged cross section according to claim 1, characterized in that: the method comprises the following steps:
(1) adopting a chiseling machine to perform chiseling treatment on the old concrete layer (1);
(2) connecting the stressed steel bars (4) with the bearing wall (2) arranged on the old concrete layer (1) and building a pouring template;
(3) and pouring concrete into the pouring template to form a new concrete layer.
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