CN112647514B - Overhanging type support-changing construction method for reinforced concrete horizontal inner support - Google Patents
Overhanging type support-changing construction method for reinforced concrete horizontal inner support Download PDFInfo
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- CN112647514B CN112647514B CN202011570444.0A CN202011570444A CN112647514B CN 112647514 B CN112647514 B CN 112647514B CN 202011570444 A CN202011570444 A CN 202011570444A CN 112647514 B CN112647514 B CN 112647514B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
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- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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Abstract
The application relates to an overhanging type support-changing construction method for a reinforced concrete horizontal inner support, which comprises the following steps: s1, setting a support changing beam: a plurality of support replacing beams are arranged on the sides, close to each other, of the support pillars on the two sides in the foundation pit along the vertical direction, so that the sides, far away from the support pillars, of the support replacing beams are flush with the inner side surface of the wall body; s2, pouring a wall body: sequentially pouring a cushion layer and a base layer on the inner bottom surface of the foundation pit, then pouring a wall body on the base layer, and pouring the wall body for multiple times along the vertical direction; s3, support replacement: and after the wall body is poured above the support replacing beams each time, installing support replacing structures between every two layers of support replacing beams, removing the inner supports between the upper part of the wall body and the next layer of support replacing beams, and then performing the next pouring process of the wall body. The multi-channel inner support structure has the effect that the multi-channel inner support along the vertical direction in the foundation pit is convenient to replace and support, and the replacement and support process of the inner support is more convenient.
Description
Technical Field
The application relates to the field of foundation pit supporting, in particular to an overhanging type support-changing construction method for a reinforced concrete horizontal inner support.
Background
In the construction of building foundation, a plurality of inner supports are generally arranged in an excavated foundation pit, and when the inner supports are touched during construction, the inner supports need to be removed, and a new support structure is added, which is called support replacement. The support changing function is that the original inner support is removed without influencing the engineering, so that the new support structure can replace the original inner support.
The existing Chinese patent with reference to the publication number of CN104328789A discloses an overhanging type support-changing construction method for a reinforced concrete horizontal inner support, which comprises the construction steps of setting a support-changing structural member and an overhanging type support-changing construction process, wherein the support-changing structural member is an overhanging support-changing beam and a reinforcing plate; the cantilever type support replacing construction process comprises the construction of a foundation bottom plate, a basement outer wall and a cantilever support replacing beam, and the continuous construction of a reinforcing plate, a second-floor top plate and a frame beam, wherein after the support replacing belt reaches the design strength, a waterproof layer and a protective layer of the second-floor outer wall are finished, and the support removing condition is met; and after the reinforced concrete horizontal inner support structure is demolished by blasting, the usable concrete slag is backfilled into the empty groove between the support pile and the outer wall of the basement step by step and layer.
Aiming at the related technologies, the inventor thinks that a plurality of horizontal inner supports are generally arranged along the vertical direction in the foundation pit, and the support changing method can only change the support of the frame beam and cannot change the supports of the rest positions in the foundation pit, thereby seriously influencing the support changing process of the foundation pit.
Disclosure of Invention
In order to facilitate the replacement of the support of the multiple inner supports in the foundation pit along the vertical direction, the support replacement process of the inner supports is more convenient, and the application provides an overhanging type support replacement construction method of the reinforced concrete horizontal inner support.
The application provides a construction method that props is traded to overhanging type of reinforced concrete horizontal inner support adopts following technical scheme:
an overhanging type support-changing construction method for a reinforced concrete horizontal inner support comprises the following steps:
s1, setting a support changing beam: a plurality of support replacing beams are arranged on the sides, close to each other, of the support pillars on the two sides in the foundation pit along the vertical direction, so that the sides, far away from the support pillars, of the support replacing beams are flush with the inner side surface of the wall body;
s2, pouring a wall body: sequentially pouring a cushion layer and a base layer on the inner bottom surface of the foundation pit, then pouring a wall body on the base layer, and pouring the wall body for multiple times along the vertical direction;
s3, support replacement: and after the wall body is poured above the support replacing beams each time, installing support replacing structures between every two layers of support replacing beams, removing the inner supports between the upper part of the wall body and the next layer of support replacing beams, and then performing the next pouring process of the wall body.
Through adopting above-mentioned technical scheme, set up the multichannel along vertical direction in the foundation ditch and trade the supporting beam, pour at every turn to trading the back of supporting beam top when the wall body, trade at every layer and install between the supporting beam and trade and prop the structure to demolish wall body top and trade the interior support between the supporting beam next time, thereby realize in the foundation ditch the multichannel of vertical direction support in the trade the process of propping, make the trade of interior support prop the process more convenient.
Preferably, trade and prop the structure and include the bracing piece and support the cover, the bracing piece is coaxial to be provided with two, and the one end that two bracing pieces kept away from each other is closely butt with the bracing beam that trades of foundation ditch both sides respectively, and the one end that two bracing pieces are close to each other all inserts and establish in the support cover to with supporting cover threaded connection, and the screw thread opposite direction on two bracing pieces.
Through adopting above-mentioned technical scheme, when trading and propping, place the bracing piece level and trade between the supporting beam at every layer of foundation ditch both sides to rotate and support the cover, because support cover and bracing piece threaded connection, and the screw thread opposite direction on two bracing pieces, support the cover this moment and can drive two bracing pieces and keeping away from each other, and make the one end that two bracing pieces kept away from each other respectively with the foundation ditch both sides trade the inseparable butt of supporting beam, thereby play the supporting role between the wall body of foundation ditch both sides, and make the interior support of foundation ditch trade the process of propping more convenient.
Preferably, a plurality of horizontal connecting rods are embedded in the supporting columns, and one ends of the connecting rods are embedded in the support exchanging beams.
Through adopting above-mentioned technical scheme, pre-buried connecting rod in the support column to make the one end of connecting rod bury underground in trading the supporting beam, thereby effectively improved and traded the joint strength between supporting beam and the support column, make the structure of trading the supporting beam more stable.
Preferably, the end of the connecting rod far away from the supporting column is flush with the side face of the support beam far away from the supporting column, the end of the connecting rod far away from the supporting column is provided with a slot, and the end of the supporting rod far away from the supporting sleeve is inserted into the slot.
Through adopting above-mentioned technical scheme, set up the slot on the connecting rod to make the bracing piece insert and establish in the slot, not only can fix a position the supported position of bracing piece, avoid the bracing piece to take place the skew at the support in-process, also can make the bracing piece pass through the connecting rod and exert pressure to the support column, effectively reduced and traded the pressure that the supporting beam received, improved and traded the supporting strength and the stability to the foundation ditch of propping the structure.
Preferably, the supporting rod is sleeved with a tightly-supporting sleeve which is rotatably connected with the supporting rod, one end of the tightly-supporting sleeve, which is far away from the supporting sleeve, is tightly abutted against the support-changing beam, and an elastic piece is fixedly arranged between the other end of the tightly-supporting sleeve and the supporting sleeve.
Through adopting above-mentioned technical scheme, set up the cover that supports on the bracing piece, trade and prop the back, under the effect of elastic component, make the cover that supports with trading the inseparable butt of stay beam to play the outrigger effect between the stay beam of trading to foundation ditch both sides, further improved the support intensity and the stability to the foundation ditch of trading the stay structure.
Preferably, the both ends of supporting the cover all are seted up annular spread groove, support the tight cover and be close to the one end of supporting the cover and insert and establish in the spread groove, and the elastic component sets up in the spread groove.
Through adopting above-mentioned technical scheme, set up the spread groove on the support bar, will support tight cover and insert and establish in the spread groove to set up the connecting piece in the spread groove, make the spread groove not only can play the guide effect to the removal process of supporting tight cover, can also play the guard action to the elastic component.
Preferably, the support changing beam is arranged in one-to-one correspondence with the inner supports in the vertical direction and is arranged below the corresponding inner supports.
Through adopting above-mentioned technical scheme, make to trade and prop the roof beam and set up along vertical direction and interior support one-to-one, can ensure to support in every way and when demolising, can both trade to prop to the internal support, realize supporting in the multichannel along vertical direction in the foundation ditch and trade and prop to ensure the support effect to the foundation ditch in the work progress.
Preferably, the cross section of the slot is polygonal or irregular.
Through adopting above-mentioned technical scheme, set up the slot cross-section into polygon or dysmorphism, can make the slot play limiting displacement to the bracing piece, avoid the bracing piece at the slot internal rotation to it is more convenient to make the installation and the dismantlement process of trading the strut structure.
Preferably, the wall body is plugged with a plugging piece in the slot during pouring.
Through adopting above-mentioned technical scheme, when pouring the wall body, pack into the shutoff piece in the slot, can make the opening of shutoff piece shutoff slot, avoid pouring the in-process and block up the slot and influence the installation of bracing piece.
Preferably, the end of the abutting sleeve far away from the supporting sleeve is fixedly provided with a rubber pad.
Through adopting above-mentioned technical scheme, set up the rubber pad on supporting tightly sheathe in, trade and prop the back and make the rubber pad and trade the supporting beam butt, not only can ensure to support tightly sheathe in and trade the butt compactedness between the supporting beam, also can with trade and form the soft contact between the supporting beam, avoid supporting tightly sheathe in scratch to trade the supporting beam, play the guard action to trading the supporting beam.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the plurality of support changing beams are arranged in the foundation pit along the vertical direction, and the support changing structure is arranged between each layer of support changing beams, so that the support changing of a plurality of inner supports in the foundation pit along the vertical direction is facilitated, and the support changing process of the inner supports is more convenient;
2. by arranging the supporting rods and the supporting sleeves, the supporting function is realized between the walls on the two sides of the foundation pit, and the supporting change process of the inner support of the foundation pit is more convenient;
3. through setting up the cover that supports, play the stable stay effect between the supporting beam to trading of foundation ditch both sides, improved and traded the support intensity and the stability to the foundation ditch of propping the structure.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present application;
FIG. 2 is a cross-sectional view of an embodiment of the present application;
fig. 3 is a partially enlarged view of a portion a in fig. 2.
Description of reference numerals: 1. a foundation pit; 11. a cushion layer; 12. a base layer; 2. a support pillar; 21. a connecting rod; 211. a slot; 3. an inner support; 4. replacing the supporting beam; 5. a wall body; 6. a support replacing structure; 61. a support bar; 62. a support sleeve; 621. connecting grooves; 6211. a spring; 63. abutting the sleeve; 631. and (7) a rubber pad.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses an overhanging type support-changing construction method for a reinforced concrete horizontal inner support.
An overhanging type support-changing construction method for a reinforced concrete horizontal inner support comprises the following steps:
s1, setting a support replacing beam 4:
referring to fig. 1 and 2, during construction, a plurality of horizontal connecting rods 21 are embedded at one side of the foundation pit 1, which is close to the supporting columns 2 at two sides, and a plurality of support exchanging beams 4 are poured at one side of the foundation pit 1, which is close to the supporting columns 2 at two sides, and one end of each connecting rod 21, which is far away from the supporting column 2, is embedded in each support exchanging beam 4, so that the support exchanging beams 4 are arranged in a one-to-one correspondence manner along the vertical direction and the inner supports 3 and are arranged below the corresponding inner supports 3, the support exchanging beams 4 are also arranged in a plurality along the horizontal direction, the support exchanging beams 4 are arranged in a one-to-one correspondence manner with the connecting rods 21, one side of each support exchanging beam 4, which is far away from the supporting column 2, is flush with the inner side surface of the wall body 5, one end of each connecting rod 21, which is far away from the supporting column 2, is flush with the side surface of each support exchanging beam 4, and one end of each connecting rod 21, which is far away from the supporting column 2, and the cross section of each slot 211 is polygonal or irregular, in the present embodiment, the slot 211 has a rectangular cross section.
S2, pouring the wall 5:
referring to fig. 1 and 2, after the bracing change beam 4 is solidified and formed, a cushion layer 11 is poured on the inner bottom surface of the foundation pit 1, after the cushion layer 11 is solidified and formed, a base layer 12 is poured on the cushion layer 11, after the base layer 12 is solidified and formed, a wall body 5 is poured on the base layer 12, when the wall body 5 is poured, pouring is carried out for multiple times along the vertical direction, the wall body 5 is poured above each layer of bracing change beam 4 and below the corresponding inner support 3, and plugging pieces are plugged into the slots 211 on the connecting rods 21 in each layer of bracing change beam 4 before each layer of wall body 5 is poured.
S3, support replacement:
referring to fig. 2 and 3, after the wall 5 is poured each time, when the wall 5 is solidified and formed, the support replacing structures 6 are installed between each layer of support replacing beams 4 on the support columns 2 on the two sides in the foundation pit 1, each support replacing structure 6 comprises a support rod 61, a support sleeve 62 and a pressing sleeve 63, the support rods 61, the support sleeves 62 and the pressing sleeves 63 are coaxially arranged, the axes of the support rods are perpendicular to the wall 5, the two support rods 61 and the pressing sleeves 63 are respectively arranged at the two ends of the support sleeves 62, the ends, far away from each other, of the two support rods 61 are matched with the slots 211 and are respectively inserted into the slots 211 of the connecting rods 21 on the support replacing beams 4 on the two sides of the foundation pit 1, the ends, close to each other, of the two support rods 61 are respectively inserted into the support sleeves 62 and are in threaded connection with the support rods, and the thread directions on the two support rods 61 are opposite; support the fixed rubber pad 631 that is provided with of one end that supports cover 62 is kept away from to tight cover 63, rubber pad 631 with trade supporting beam 4 inseparable butt, support tight cover 63 and be greater than the internal diameter of the other end near the internal diameter that supports cover 62 one end, annular connecting groove 621 has all been seted up at the both ends that support cover 62, support tight cover 63 and be close to the one end that supports cover 62 and insert and establish in connecting groove 621, be provided with the elastic component in the connecting groove 621, the elastic component is spring 6211, spring 6211 evenly is provided with a plurality of along the circumference that supports cover 62, the length direction of spring 6211 is the same with the axis direction that supports cover 62, the one end and the support cover 62 fixed connection of spring 6211, the other end with support tight cover 63 fixed connection.
Referring to fig. 2, after the support replacing structure 6 is installed, the inner support 3 between the upper side of the wall body 5 and the next layer of support replacing beam 4 is removed, then the next pouring process of the wall body 5 is performed, and the process is circulated, so that the support replacing process of the inner support 3 in the foundation pit 1 is realized, the support replacing process of the inner support 3 in the foundation pit 1 in multiple channels along the vertical direction is facilitated, and the support replacing process of the inner support 3 is more convenient.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. An overhanging type support-changing construction method for a reinforced concrete horizontal inner support is characterized by comprising the following steps:
s1, arranging a support exchange beam (4): a plurality of support replacing beams (4) are arranged on the sides, close to each other, of the support columns (2) on the two sides in the foundation pit (1) along the vertical direction, so that the sides, far away from the support columns (2), of the support replacing beams (4) are flush with the inner side surface of the wall body (5);
s2, pouring the wall (5): sequentially pouring a cushion layer (11) and a base layer (12) on the inner bottom surface of the foundation pit (1), then pouring a wall body (5) on the base layer (12), and pouring the wall body (5) for multiple times along the vertical direction;
s3, support replacement: after the wall body (5) is poured above the support replacing beams (4) each time, installing support replacing structures (6) between every two layers of support replacing beams (4), removing inner supports (3) between the upper part of the wall body (5) and the next layer of support replacing beams (4), and then performing the next pouring process of the wall body (5);
trade and prop structure (6) including bracing piece (61) and support cover (62), bracing piece (61) coaxial be provided with two, the one end that two bracing pieces (61) kept away from each other respectively with the foundation ditch (1) both sides trade bracing beam (4) inseparable butt, the one end that two bracing pieces (61) are close to each other all inserts and establish in supporting cover (62) to with supporting cover (62) threaded connection, and the screw thread opposite direction on two bracing pieces (61).
2. The overhanging type support-changing construction method of the reinforced concrete horizontal inner support according to claim 1 is characterized in that a plurality of horizontal connecting rods (21) are embedded in the supporting column (2), and one ends of the connecting rods (21) are embedded in the support-changing beam (4).
3. The cantilever type support-changing construction method for the horizontal inner support of the reinforced concrete according to claim 2, wherein one end of the connecting rod (21) far away from the supporting column (2) is flush with the side surface of the support-changing beam (4) far away from the supporting column (2), one end of the connecting rod (21) far away from the supporting column (2) is provided with a slot (211), and one end of the supporting rod (61) far away from the supporting sleeve (62) is inserted into the slot (211).
4. The cantilever type support-changing construction method for the horizontal inner support of the reinforced concrete according to claim 1, wherein the supporting rod (61) is sleeved with a pressing sleeve (63) rotatably connected with the supporting rod, one end of the pressing sleeve (63) far away from the supporting sleeve (62) is tightly abutted with the support-changing beam (4), and an elastic element is fixedly arranged between the other end of the pressing sleeve and the supporting sleeve (62).
5. The cantilever type support-changing construction method for the horizontal inner support of the reinforced concrete according to claim 4, wherein two ends of the support sleeve (62) are provided with annular connecting grooves (621), one end of the abutting sleeve (63) close to the support sleeve (62) is inserted into the connecting grooves (621), and the elastic member is arranged in the connecting grooves (621).
6. The cantilever type support-changing construction method of the reinforced concrete horizontal inner support according to claim 1, wherein the support-changing beams (4) are arranged in one-to-one correspondence with the inner supports (3) in the vertical direction and are arranged below the corresponding inner supports (3).
7. The overhanging type support-changing construction method of the reinforced concrete horizontal inner support according to claim 3, wherein the section of the slot (211) is polygonal or irregular.
8. The overhanging type support-replacing construction method for the reinforced concrete horizontal inner support according to claim 3, wherein the wall body (5) is plugged into a plugging piece in the slot (211) during pouring.
9. The cantilever type support-replacing construction method for the horizontal inner support of reinforced concrete according to claim 4, wherein a rubber pad (631) is fixedly arranged at one end of the abutting sleeve (63) far away from the support sleeve (62).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011570444.0A CN112647514B (en) | 2020-12-26 | 2020-12-26 | Overhanging type support-changing construction method for reinforced concrete horizontal inner support |
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| CN202011570444.0A CN112647514B (en) | 2020-12-26 | 2020-12-26 | Overhanging type support-changing construction method for reinforced concrete horizontal inner support |
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| CN112647514B true CN112647514B (en) | 2022-01-04 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104328789A (en) * | 2014-10-31 | 2015-02-04 | 天津三建建筑工程有限公司 | Overhanging type support changing construction method for reinforced concrete horizontal inner support |
| CN105951848A (en) * | 2016-07-01 | 2016-09-21 | 杭州江润科技有限公司 | Non-intermittent composite transfer structure for super-deep foundation pit support and construction method |
| CN106567395A (en) * | 2016-11-14 | 2017-04-19 | 中建三局基础设施工程有限公司 | Construction method capable of replacing steel support substitution by full space supports |
| CN110029674A (en) * | 2019-04-18 | 2019-07-19 | 江苏省华建建设股份有限公司 | A kind of bracing demolition and basement construction method for deep basal pit |
| CN110593269A (en) * | 2019-08-27 | 2019-12-20 | 中建四局第六建筑工程有限公司 | Turnover type structure support changing system and construction method thereof |
-
2020
- 2020-12-26 CN CN202011570444.0A patent/CN112647514B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104328789A (en) * | 2014-10-31 | 2015-02-04 | 天津三建建筑工程有限公司 | Overhanging type support changing construction method for reinforced concrete horizontal inner support |
| CN105951848A (en) * | 2016-07-01 | 2016-09-21 | 杭州江润科技有限公司 | Non-intermittent composite transfer structure for super-deep foundation pit support and construction method |
| CN106567395A (en) * | 2016-11-14 | 2017-04-19 | 中建三局基础设施工程有限公司 | Construction method capable of replacing steel support substitution by full space supports |
| CN110029674A (en) * | 2019-04-18 | 2019-07-19 | 江苏省华建建设股份有限公司 | A kind of bracing demolition and basement construction method for deep basal pit |
| CN110593269A (en) * | 2019-08-27 | 2019-12-20 | 中建四局第六建筑工程有限公司 | Turnover type structure support changing system and construction method thereof |
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