CN214832749U - Novel inner supporting structure for foundation pit - Google Patents
Novel inner supporting structure for foundation pit Download PDFInfo
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- CN214832749U CN214832749U CN202121557077.0U CN202121557077U CN214832749U CN 214832749 U CN214832749 U CN 214832749U CN 202121557077 U CN202121557077 U CN 202121557077U CN 214832749 U CN214832749 U CN 214832749U
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Abstract
The utility model discloses a novel foundation pit inner supporting structure, which comprises a foundation pit, wherein at least a first-floor building and a second-floor building are arranged in the foundation pit, a plurality of supporting piles are arranged on one side of the foundation pit, a first concrete supporting plate is arranged between the bottom of the second-floor building and the supporting piles, the first concrete supporting plate is connected with the bottom of the second-floor building and the supporting piles through pouring, a waist support replacing beam is arranged on one side of the supporting piles, and the height of the waist support replacing beam is flush with the bottom of the first-floor building; a plurality of short supporting beams which are uniformly distributed are also arranged between the waist replacing and supporting beam and the bottom of the negative first-storey building, and the short supporting beams and the waist replacing and supporting beam are fixedly arranged together and are used for supporting the bottom of the negative first-storey building and the supporting piles; the utility model discloses can directly carry out the follow-up construction of dismantling an interior supporting beam and burden one-storey building thing for engineering construction speed has shortened construction period, has practiced thrift the time limit for a project cost.
Description
Technical Field
The utility model relates to a foundation ditch supports technical field, in particular to novel bearing structure in foundation ditch.
Background
In the construction of new buildings in old cities, a lot of buildings are arranged around the site, various underground pipelines of surrounding roads are numerous, and the environmental conditions are complex. Therefore, the inner support system becomes an important force transmission component when the foundation pit is excavated, the safety of foundation pit excavation is ensured, and the normal use of surrounding buildings is ensured. Especially, in a newly built building, different underground building layers are often involved, so the excavated foundation depth also has the regional characteristic, a foundation pit needs to be partitioned according to the basement layers, the development progress and the like, and each partition needs to be supported independently.
As shown in fig. 1, both sides of the foundation pit need to be supported, and an inner supporting beam is used for supporting, as shown in fig. 2, the foundation pit reaches the underground negative two floors, a first-floor building and a negative two-floor building are to be built, and the inner supporting beam 10 is positioned in the middle of the negative first-floor building, if the negative first-floor building needs to be constructed, the inner supporting beam 10 must be firstly removed, so that the construction progress cannot be influenced; before the inner supporting beam is dismantled, the support changing treatment is needed, namely, other structures or devices are built to replace the inner supporting beam, so that the foundation pit can be stably supported without collapse; the tradition adopts the effect of replacing interior bracing beam of the mode of trading the fagging, the fagging is traded in the construction completion, and reach after the design intensity, interior bracing beam can demolish, as shown in fig. 3, the tradition trades the mode of propping of trading the fagging and comprises first concrete support board and the second concrete support board of installing in first concrete support board top, need accomplish the waterproof construction work to burden two-storey building outer wall before the second concrete support board of construction, and the back fill tamping work between first concrete support board and the second concrete support board, because the waterproof construction work of outer wall and back fill tamping work all need longer engineering time, so can lead to construction period longer, time limit for a project cost increase.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a novel foundation pit inner supporting structure; on the premise of not performing waterproof construction operation and filling operation, the construction of subsequently dismantling the inner supporting beam and bearing a floor building can be directly performed, the engineering construction speed is accelerated, the construction period is shortened, and the construction period cost is saved.
In order to achieve the purpose, the utility model provides a novel foundation pit inner supporting structure, including the foundation pit, burden first floor building and burden second floor building have been installed at least to the inside of foundation pit, a plurality of fender piles have been installed to foundation pit one side, burden second floor building bottom and fender pile between install first concrete backup pad, first concrete backup pad links together with burden second floor building bottom and fender pile through pouring, the fender pile one side is installed and is traded and prop the waist roof beam, trade the height of propping the waist roof beam and the bottom of burden first floor building and level; and a plurality of short supporting beams which are uniformly distributed are also arranged between the waist replacing and supporting beam and the bottom of the negative first-storey building, and the short supporting beams and the waist replacing and supporting beam are fixedly arranged together and are used for supporting the bottom of the negative first-storey building and the supporting piles.
Preferably, the distance between the negative first-storey building and the support piles is 1500mm, and the distance between two adjacent short support beams is 1.5-2 m.
Preferably, the height of the cross section of the waist-changing beam is larger than that of the short supporting beam.
Preferably, a plurality of triaxial cement mixing piles are further arranged between the foundation pit and the support piles, the triaxial cement mixing piles are 850mm in diameter and 19.4m in length, and the inserted strongly weathered rock is not less than 1.0 m.
Preferably, the support pile has a diameter of 1200mm and a length of 20.0m, and the inserted strongly weathered rock is not less than 2.0 m.
Preferably, the main reinforcement of the short support beam is reserved when the bottom plate of the first-floor building is constructed, the waist support replacing beam and the support pile are anchored by adopting a bar planting mode, and the short support beam, the waist support replacing beam and the bottom plate of the first-floor building are constructed simultaneously.
Preferably, the crown beam has been installed to the fender pile top, the triaxial cement stirring stake highly be higher than the height of crown beam, be equipped with on triaxial cement stirring stake and the foundation ditch and put the slope, be equipped with the sclerosis layer in the 3m scope that the top of slope and triaxial cement stirring stake of foundation ditch contacted.
Preferably, the bottom of the first concrete supporting plate is provided with a brick drainage ditch of 300mm by 300 mm.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the first concrete supporting plate is arranged between the bottom of the negative second-floor building and the supporting pile, is connected with the bottom of the negative second-floor building and the supporting pile through pouring and is used for supporting the bottom of the negative second-floor building and the supporting pile; a waist support replacing beam is arranged on one side of the support pile, and the height of the waist support replacing beam is flush with the bottom of a building bearing one floor; a plurality of short supporting beams which are uniformly distributed are also arranged between the waist replacing and supporting beam and the bottom of the negative first-storey building, and the short supporting beams and the waist replacing and supporting beam are fixedly arranged together and are used for supporting the bottom of the negative first-storey building and the supporting piles; the construction of subsequent dismantling of the inner supporting beam and the negative first-floor building can be directly carried out on the premise of not carrying out waterproof construction operation and filling operation on the exterior of the negative second-floor building, the engineering construction speed is accelerated, the construction period is shortened, and the construction period cost is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a prior art foundation pit support structure;
FIG. 2 is a prior art building structure to be constructed within a foundation pit;
FIG. 3 is a cross-sectional view of a prior art support structure within a foundation pit;
fig. 4 is a cross-sectional view of a novel foundation pit support structure provided by the present invention;
fig. 5 is a schematic structural diagram of a novel supporting structure in a foundation pit. The figure includes:
1-negative one-storey building, 2-negative two-storey building, 4-support piles, 5-first concrete support plate, 6-support-changing waist beam, 7-short support beam, 3-triaxial cement mixing pile, 8-crown beam, 9-brick drainage ditch, 10-inner support beam, 11-second concrete support plate, 12-backfill soil, 13-slope-setting and 14-hardening layer.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present embodiment, and it is obvious that the described embodiment is an embodiment of the present invention, not all embodiments. Based on this embodiment in the utility model, all other this embodiments that ordinary skilled person in the art obtained under the prerequisite of not making creative work all belong to the scope of the utility model.
Referring to fig. 4 and 5, the utility model provides a novel support structure in foundation pit, including the foundation pit, the shown foundation pit reaches two layers of underground burden deeply, the inside of foundation pit is installed at least and is born one-storey building 1 and two-storey building 2, will construct and bear one-storey building 1 and two-storey building 2, a plurality of triaxial cement mixing piles 3 are installed to one side of foundation pit, triaxial cement mixing pile 3 is used for blockking the earthwork around the foundation pit, keeps the integrality of foundation pit, prevents the foundation pit from collapsing; the diameter of the triaxial cement mixing pile 3 is 850mm, the length of the triaxial cement mixing pile is 19.4m, and the inserted strong weathered rock is not less than 1.0 m.
Only be provided with triaxial cement mixing pile 3 around the foundation ditch and can not be fine and prevent the foundation ditch completely to collapse, in this embodiment, in order to further prevent the foundation ditch to collapse, still be in triaxial cement mixing pile 3 one side is installed a plurality of fender posts 4, specifically, fender post 4 diameter is 1200mm, and length is 20.0m to it is no less than 2.0m to insert strong weathering rock.
As shown in fig. 4, the inner support beams 10 are located at the middle position of the minus one-storey building 1, and when the minus two-storey building 2 at the lower part of the minus one-storey building 1 is constructed, although the inner support beams 10 have an influence on the construction, the influence range is small; however, the construction of the negative one-storey building 1 by the inner support beams 10 is greatly influenced, and if the negative one-storey building 1 needs to be constructed, the construction progress cannot be influenced only by dismantling the inner support beams 10; the present embodiment replaces the support of the foundation pit with the following structure so that the inner support beam 10 can be replaced and removed.
As shown in fig. 4 and 5, a first concrete support plate 5 is installed between the bottom of the second floor building 2 and the support piles 4, and the first concrete support plate 5 is connected with the bottom of the second floor building 2 and the support piles 4 by casting and is used for supporting the bottom of the second floor building 2 and the support piles 4; one side of the support pile 4 is provided with a waist support replacing beam 6, and the height of the waist support replacing beam 6 is flush with the bottom of the building 1 with one floor; a plurality of short supporting beams 7 which are uniformly distributed are also arranged between the waist replacing and supporting beam 6 and the bottom of the first-storey building 1, and the short supporting beams 7 and the waist replacing and supporting beam 6 are fixedly arranged together and used for supporting the bottom of the first-storey building 1 and the supporting piles 4; the first concrete supporting plate 5, the short supporting beam 7 and the waist-changing beam 6 are used for supporting the upper part and the lower part of the supporting pile 4 respectively, and after the first concrete supporting plate 5, the short supporting beam 7 and the waist-changing beam 6 are solidified and have certain strength, the inner supporting beam 10 can be replaced, and the inner supporting beam 10 can be detached; the construction of subsequently dismantling the inner supporting beam 10 and the negative first-storey building 1 can be directly carried out on the premise of not carrying out waterproof construction operation and filling operation on the exterior of the negative second-storey building 2, so that the engineering construction speed is accelerated, the construction period is shortened, and the construction period cost is saved.
Furthermore, by adopting the foundation pit internal support structure, the construction speed of the main structures of the negative first-floor building 1 and the negative second-floor building 2 can be increased, the waterproof operation and the backfilling operation of the outer wall of the negative second-floor building 2 influencing the main construction are reserved in the later-stage unified construction, the construction period is advanced on the premise that the engineering cost is basically unchanged, the construction period is saved, and the construction period cost is saved.
Specifically, in the embodiment, the distance between the negative one-storey building 1 and the support piles 4 is 1500mm, and the distance between two adjacent short support beams 7 is 1.5m-2 m; in the present embodiment, the distance between two adjacent short supporting beams 7 is preferably 1.5m, and in other embodiments, the distance between two adjacent short supporting beams 7 may be selected according to actual construction conditions.
As shown in fig. 4, the cross-sectional height of the lumbar support beam 6 is greater than that of the short support beam 7; the waist-changing beam 6 with a higher cross-sectional height can have a larger contact area to contact with the support piles 4, and simultaneously the supporting force between the waist-changing beam 6 and the support piles 4 is transmitted to the bottom plate of the building 1 with one floor through the short support beam 7.
The main reinforcement of the short supporting beam 7 is reserved when the bottom plate of the first-floor building 1 is constructed, the waist-supporting beam 6 and the supporting piles 4 are anchored in a reinforcement planting mode, the short supporting beam 7, the waist-supporting beam 6 and the bottom plate of the first-floor building 1 are constructed simultaneously, and by adopting the reservation and simultaneous construction method, the supporting piles 4 can be supported more stably, and meanwhile, the construction period can be saved.
As shown in fig. 4, a crown beam 8 is arranged above the support piles 4, the crown beam 8 is used for preventing the edge of the top of the foundation pit from collapsing, the height of the triaxial cement mixing pile 3 is higher than that of the crown beam 8, slopes 13 are arranged on the triaxial cement mixing pile 3 and the foundation pit, and a hardened layer 14 is arranged in a range of 3m where the slope top of the foundation pit contacts with the triaxial cement mixing pile 3; and a brick drainage ditch 9 with the thickness of 300mm x 300mm is arranged at the bottom of the first concrete supporting plate 5.
The construction steps of the foundation pit inner supporting structure are as follows:
step S1, firstly, excavating a foundation pit, wherein the foundation pit at least reaches the underground minus two floors, and at least a first-floor building 1 and a minus two-floor building 2 are to be built inside the foundation pit;
step S2, installing or constructing a triaxial cement mixing pile 3 and a support pile 4, and protecting the foundation pit;
step S3, mounting the crown beam 8 and the inner support beam 10 for supporting the support pile 4;
step S4, constructing the negative second-storey building 2 and the first concrete supporting plate 5, and supporting the support piles 4 by the first concrete supporting plate 5;
step S5, pouring a bottom plate of the first-floor building 1 and reserving main ribs of the short supporting beams 7;
step S6, pouring the short supporting beam 7 and the waist replacing beam 6, and pouring the minus one-storey building 1, the short supporting beam 7 and the waist replacing beam 6 together;
step S7, waiting for a period of time, and when the short supporting beam 7 and the waist-changing beam 6 have certain strength and can replace the inner supporting beam 10, dismantling the inner supporting beam 10;
step S8, constructing the building above the bottom plate of the first floor building 1, and uniformly performing waterproof treatment on the outer side wall surface of the second floor building 2 after the construction is finished; and backfilling the space between the negative second-storey building 2 and the support piles 4, wherein the short support beams 7 and the waist support replacing beams 6 are backfilled inside without being dismantled.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (8)
1. The novel foundation pit inner support structure is characterized by comprising a foundation pit, wherein at least a first-floor building (1) and a second-floor building (2) are arranged in the foundation pit, a plurality of supporting piles (4) are arranged on one side of the foundation pit, a first concrete support plate (5) is arranged between the bottom of the second-floor building (2) and the supporting piles (4), the first concrete support plate (5) is connected with the bottom of the second-floor building (2) and the supporting piles (4) through pouring, a support-changing waist beam (6) is arranged on one side of each supporting pile (4), and the height of the support-changing waist beam (6) is flush with the bottom of the first-floor building (1); a plurality of short supporting beams (7) which are uniformly distributed are also arranged between the waist replacing and supporting beam (6) and the bottom of the negative one-storey building (1), and the short supporting beams (7) and the waist replacing and supporting beam (6) are fixedly arranged together and used for supporting the bottom of the negative one-storey building (1) and the supporting piles (4).
2. A novel foundation pit inner support structure as claimed in claim 1, wherein the distance between the building (1) bearing one storey and the supporting piles (4) is 1500mm, and the distance between two adjacent short supporting beams (7) is 1.5-2 m.
3. A novel foundation pit support structure as claimed in claim 1, wherein the cross-sectional height of the lumbar support beam (6) is greater than the cross-sectional height of the short support beam (7).
4. A novel foundation pit internal support structure as claimed in claim 1, wherein a plurality of triaxial cement mixing piles (3) are arranged between the foundation pit and the support piles (4), the triaxial cement mixing piles (3) have a diameter of 850mm and a length of 19.4m, and are inserted into strongly weathered rock to be not less than 1.0 m.
5. A novel foundation pit supporting structure as claimed in claim 1, wherein the supporting piles (4) are 1200mm in diameter and 20.0m long, and are inserted into the strongly weathered rock to be not less than 2.0 m.
6. A novel foundation pit inner supporting structure as claimed in claim 1, wherein main bars of the short supporting beams (7) are reserved when a bottom plate of a first-floor building (1) is constructed, the support-replacing wale (6) and the supporting piles (4) are anchored by adopting a bar planting mode, and the short supporting beams (7), the support-replacing wale (6) and the bottom plate of the first-floor building (1) are constructed simultaneously.
7. A novel foundation pit inner supporting structure as claimed in claim 4, wherein a top beam (8) is arranged above the supporting piles (4), the height of the triaxial cement mixing pile (3) is higher than that of the top beam (8), a slope (13) is arranged on the triaxial cement mixing pile (3) and the foundation pit, and a hardened layer (14) is arranged in the range of 3m where the slope top of the foundation pit is in contact with the triaxial cement mixing pile (3).
8. A novel foundation pit support structure as claimed in claim 1, wherein the bottom of the first concrete support plate (5) is provided with a 300mm by 300mm brick drain (9).
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| CN202121557077.0U CN214832749U (en) | 2021-07-09 | 2021-07-09 | Novel inner supporting structure for foundation pit |
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| CN202121557077.0U CN214832749U (en) | 2021-07-09 | 2021-07-09 | Novel inner supporting structure for foundation pit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961335A (en) * | 2022-06-24 | 2022-08-30 | 广东省第四建筑工程有限公司 | Demolition construction method for large-span reinforced concrete supporting beam |
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- 2021-07-09 CN CN202121557077.0U patent/CN214832749U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114961335A (en) * | 2022-06-24 | 2022-08-30 | 广东省第四建筑工程有限公司 | Demolition construction method for large-span reinforced concrete supporting beam |
| CN114961335B (en) * | 2022-06-24 | 2023-08-15 | 广东省第四建筑工程有限公司 | Demolition construction method for large-span reinforced concrete support beam |
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