CN105113512A - Bracing substitution at missed place of beam plate in foundation pit support structure and construction method thereof - Google Patents
Bracing substitution at missed place of beam plate in foundation pit support structure and construction method thereof Download PDFInfo
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- CN105113512A CN105113512A CN201510472080.5A CN201510472080A CN105113512A CN 105113512 A CN105113512 A CN 105113512A CN 201510472080 A CN201510472080 A CN 201510472080A CN 105113512 A CN105113512 A CN 105113512A
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- slab
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- foundation pit
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Abstract
The invention discloses a bracing substitution at a missed place of a beam plate in a foundation pit support structure and a construction method thereof. The method comprises the following steps: 1) constructing an underground structure to a place below the missed place of the beam plate in a foundation pit, and the underground structure at least comprising the beam plate and frame columns; 2) constructing an upward movement bearing platform at the top ends of the frame columns of the underground structure, and fixedly installing a first anchor plate on the surface of the upward movement bearing platform; 3) constructing a first ring beam at a side part of an underground diaphragm wall at the missed place of the beam plate, and fixedly installing a second anchor plate on a side surface of the first ring beam; 4) installing a sectional steel bracing substitution between the second anchor plate and the first anchor plate; and 5) detaching a concrete bracing at the missed place of the beam plate. The bracing substitution in the foundation pit support structure, which is disclosed by the invention is capable of carrying out supplementary bracing on a locally-missed part at the missed place of the beam plate. Under the effective bracing of the sectional steel bracing substitution, the concrete bracing above the missed place of the beam plate can be timely detached, in this way, the concrete bracing can be detached in advance and the safety working condition of the foundation pit support structure is ensured.
Description
Technical field
The present invention relates to building engineering field, the support replacement at beam slab disappearance place and construction method thereof in espespecially a kind of foundation pit enclosure structure.
Background technology
Construction work is just towards super-sized foundation pit future development, and for meeting the diversified requirement of building function, the structure design of foundation ditch also becomes increasingly complex various, the design conditions of appearance floor plates excalation more in underground structure.
Refer to Fig. 1, Fig. 1 is a kind of foundation ditch braced structures of the prior art.In huge ultradeep foundation pit engineering construction, mostly adopt Horizontal concrete to support (219,219', 229) and carry out pattern foundation pit supporting structure with the form that diaphragm wall 211 combines.Excavation of foundation pit on earth after, Horizontal concrete supports (219,219', 229) successively can abolish with in underground structure upwards work progress, utilizes the underground structure of having constructed as the permanent support of space enclosing structure.This underground structure comprises the beam slab and frame column 230 of having constructed.
The Specific construction process of underground structure as shown in Figures 2 to 4.As shown in Figure 2, the form adopting Horizontal concrete support 219 and diaphragm wall 211 to combine in Excavation Process carries out pattern foundation pit supporting structure.First construct after excavation of foundation pit completes undermost beam slab 214 and frame column 230, the underground structure be made up of beam slab 214 and frame column 230 after undermost beam slab 214 has been constructed stays on diaphragm wall 211.The Horizontal concrete removed after beam slab 214 has been constructed above it supports 219.
As shown in Figure 3, the beam slab 224 after Horizontal concrete support 219 dismounting above construction level concrete support 219 and frame column 230.As shown in Figure 4, the Horizontal concrete removed after beam slab 224 has been constructed above it supports 229.
The work progress of general underground structure is all successively construct according to above-mentioned process, each construction one deck beam slab (214,224) and frame column 230, and the Horizontal concrete knocked out subsequently above it supports (219,229).But as shown in Figure 4, when underground structure cannot form effective support to diaphragm wall 211 shape at beam slab disappearance place 214' when not having a beam slab disappearance place 214' of beam slab that constructs to.Once the Horizontal concrete abolishing 214' top, beam slab disappearance place in advance supports 219', then effectively cannot support space enclosing structure, thus cause foundation pit enclosure structure to be in unfavorable operating mode.If this layer of Horizontal concrete is not supported 219' to abolish and the beam slab 215' on its upper strata of directly constructing, the beam slab 215' of layer supports 219' abolishing this road Horizontal concrete after closing thereon, then in the small space of underground, cannot support 219' to Horizontal concrete at all efficiently abolish operation.
Summary of the invention
The invention provides support replacement and the construction method thereof at beam slab disappearance place in a kind of foundation pit enclosure structure, in this foundation pit enclosure structure, the support replacement at beam slab disappearance place and construction method thereof can solve existing foundation pit enclosure structure Problems existing.
Technical scheme of the present invention comprises beam slab disappearance place support replacement construction method in a kind of foundation pit enclosure structure, and the method comprises the following steps:
1) construct in foundation ditch the below of underground structure to beam slab disappearance place, described underground structure at least comprises beam slab and frame column;
2) in the construction of the top of the frame column of described underground structure, return cushion cap, the surface returning cushion cap on described fixedly mounts the first anchor slab;
3) to construct the first ring beam at the sidepiece of the diaphragm wall at described beam slab disappearance place; The second anchor slab is fixedly mounted in the side of described first ring beam;
4) between described second anchor slab and described first anchor slab, a shaped steel support replacement is installed;
5) concrete support at described beam slab disappearance place is removed.
In foundation pit enclosure structure of the present invention, the further improvement of beam slab disappearance place support replacement construction method is: the first beam slab of constructing above described beam slab disappearance place after described concrete support dismounting, the edge of described first beam slab stays on the surface of described diaphragm wall, the described shaped steel support replacement of dismounting after described first Beam-Slab Construction completes.
In foundation pit enclosure structure of the present invention, the further improvement of beam slab disappearance place support replacement construction method is: it is characterized in that installing described second anchor slab comprises the steps:
1) anchor bar is embedded in advance described first ring beam inner;
2) described second anchor slab is fitted in the side of described first ring beam, and use the technique of pressure arc slugging that described second anchor slab is welded in described anchor bar.
In foundation pit enclosure structure of the present invention, the further improvement of beam slab disappearance place support replacement construction method is: it is characterized in that installing described first anchor slab comprises the steps:
1) anchor bar is embedded in advance described on return cushion cap inside;
2) described first anchor slab is fitted in described on return the surface of cushion cap, and use the technique of pressure arc slugging that described first anchor slab is welded in described anchor bar.
The support replacement at foundation pit enclosure structure beam slab disappearance place can carry out supplementary supporting to the position of the localized loss at beam slab disappearance place.Under effective support of shaped steel support replacement, the concrete support above beam slab disappearance place can be removed timely, so both can carry out the safe operating mode that concrete support premature removal in turn ensure that foundation pit enclosure structure.
Technical scheme of the present invention also comprises a kind of support replacement of foundation pit enclosure structure beam slab disappearance place, and it comprises the second anchor slab, the first anchor slab and shaped steel support replacement, wherein:
The sidewall of foundation ditch is provided with diaphragm wall, and the surface of described diaphragm wall is provided with the first ring beam extended in the horizontal direction, and described second anchor slab is fixedly installed in the side of described first ring beam;
Foundation ditch inside is provided with frame column, and the top of described frame column is provided with returns cushion cap, described first anchor slab be fixedly installed in described on return the surface of cushion cap;
One end of described shaped steel support replacement is welded in described second anchor slab, and the other end of described shaped steel support replacement is welded in described first anchor slab.
The further improvement of the support replacement at foundation pit enclosure structure beam slab disappearance place of the present invention is: the height of described first anchor slab is less than the height of described second anchor slab.
The support replacement at foundation pit enclosure structure beam slab disappearance place can carry out supplementary supporting to the position of the localized loss at beam slab disappearance place.Under effective support of shaped steel support replacement, the concrete support above beam slab disappearance place can be removed timely, so both can carry out the safe operating mode that concrete support premature removal in turn ensure that foundation pit enclosure structure.
Accompanying drawing explanation
Fig. 1 to Fig. 4 is the schematic diagram of the work progress of the inner underground structure of foundation ditch of the prior art;
Fig. 5 is the lateral view of the support replacement at foundation pit enclosure structure beam slab disappearance place in the present invention;
Fig. 6 is that the concrete support of foundation pit enclosure structure in the present invention removes lateral side view;
Fig. 7 is the lateral view after the first Beam-Slab Construction of foundation pit enclosure structure in the present invention completes; And
Fig. 8 is the lateral view after the shaped steel support replacement of foundation pit enclosure structure in the present invention is removed.
Detailed description of the invention
Below by way of specific instantiation, embodiments of the present invention are described, those skilled in the art the content disclosed by this manual can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by detailed description of the invention different in addition, and the every details in this manual also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.
It should be noted that, structure, ratio, size etc. that this manual institute accompanying drawings illustrates, content all only in order to coordinate manual to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, quote in this manual as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
Bracing of foundation pit of the present invention is introduced below in conjunction with accompanying drawing
Beam slab disappearance place support replacement construction method in structure:
Refer to Fig. 5, Fig. 5 is the lateral view of the foundation pit enclosure structure in the present invention.As shown in Figure 5, in foundation pit enclosure structure of the present invention, beam slab disappearance place support replacement construction method specifically comprises the following steps:
1) at the below construction underground structure at the inner beam slab disappearance place 14 of foundation ditch, described underground structure frame column 10 and beam slab, cushion cap 12 is returned in the construction of the top of frame column 10, and the end face above returning cushion cap 12 is inclined-plane.
2) the first anchor slab 17 is installed.First anchor slab 17 be fixedly installed in frame column 10 on return the surface of cushion cap 12.In the installation process of the first anchor slab 17, first anchor bar 16 is embedded in advance the inside returning cushion cap 12, subsequently the first anchor slab 17 is fitted in the surface returning cushion cap 12, and use the technique of pressure arc slugging that the first anchor slab 17 is welded in anchor bar 16.
3) at the first ring beam 13 that the surface construction of the diaphragm wall 11 of foundation pit side-wall extends in the horizontal direction.The side of the first ring beam 13 is beam slab disappearance place 14.As shown in Figure 2, beam slab disappearance place 14 does not have to arrange the beam and slab structure staying on the first ring beam 13.Above beam slab disappearance place 14, be provided with concrete support 19, the two end supports of concrete support 19 is in diaphragm wall 11.
4) the second anchor slab 15 is fixedly mounted in the side of the first ring beam 13.Second anchor slab 15 is installed on the side of the first ring beam 13 near beam slab disappearance place 14.In the installation process of the second anchor slab 15, first anchor bar 16 is embedded in advance the inside of first ring beam 13, subsequently the second anchor slab 15 is fitted in the side of the first ring beam 13, and use the technique of pressure arc slugging that the second anchor slab 15 is welded in anchor bar 16.
5) shaped steel support replacement 18 is installed, one end of shaped steel support replacement 18 is welded in the second anchor slab 15, the other end of shaped steel support replacement 18 is welded in the first anchor slab 17.Shaped steel support replacement 18 is supported in first ring beam 13 on diaphragm wall 11 surface by the second anchor slab 15, and shaped steel support replacement 18 forms effective support to the diaphragm wall 11 near beam slab disappearance place 14 part.
6) as shown in FIG. 2 and 3, be provided with concrete support 19 above above beam slab disappearance place 14, concrete support 19 is arranged in the horizontal direction, and its two ends stay on the surface of diaphragm wall.Dismantling concrete after stable support is formed to diaphragm wall 11 support 19 in shaped steel support replacement 18 installation.
7) as shown in FIG. 4 and 5, concrete support 19 to be constructed the first beam slab 20 after removing above beam slab disappearance place 14.The edge of the first beam slab 20 stays on the surface of diaphragm wall 11, has constructed and formed diaphragm wall 11 effectively to support rear dismounting shaped steel support replacement 18 at the first beam slab 20.
Adopt beam slab disappearance place support replacement construction method in foundation pit enclosure structure of the present invention can carry out supplementary supporting to the position of the localized loss at beam slab disappearance place 14.Under effective support of shaped steel support replacement 18, the concrete support 19 above beam slab disappearance place 14 can be removed timely, so both can carry out the safe operating mode that concrete support 19 premature removal in turn ensure that foundation pit enclosure structure.
Technical scheme of the present invention also comprises a kind of foundation pit enclosure structure support replacement.As shown in Figure 2, foundation pit enclosure structure support replacement of the present invention comprises the second anchor slab 15, first anchor slab 17 and shaped steel support replacement 18, wherein:
The sidewall of foundation ditch is provided with diaphragm wall 11, and the surface of diaphragm wall 11 is provided with the side that the first ring beam 13, second anchor slab 15 extended in the horizontal direction is fixedly installed in the first ring beam 13.
Foundation ditch inside is provided with frame column 10, and the top of frame column 10 is provided with returns cushion cap 12, and the first anchor slab 17 is fixedly installed in the surface returning cushion cap 12.
One end of shaped steel support replacement 18 is welded in the second anchor slab 15, and the other end of shaped steel support replacement 18 is welded in the first anchor slab 17.In the present embodiment, the height of the first anchor slab 17 is less than the height of the second anchor slab 15.
Foundation pit enclosure structure support replacement can carry out supplementary supporting to the position of the localized loss at beam slab disappearance place 14.Under effective support of shaped steel support replacement 18, the concrete support 19 above beam slab disappearance place 14 can be removed timely, so both can carry out the safe operating mode that concrete support 19 premature removal in turn ensure that foundation pit enclosure structure.
The above is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, not departing from the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solution of the present invention, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (6)
1. a beam slab disappearance place support replacement construction method in foundation pit enclosure structure, is characterized in that comprising the following steps:
1) construct in foundation ditch the below of underground structure to beam slab disappearance place, described underground structure at least comprises beam slab and frame column;
2) in the construction of the top of the frame column of described underground structure, return cushion cap, the surface returning cushion cap on described fixedly mounts the first anchor slab;
3) to construct the first ring beam at the sidepiece of the diaphragm wall at described beam slab disappearance place; The second anchor slab is fixedly mounted in the side of described first ring beam;
4) between described second anchor slab and described first anchor slab, a shaped steel support replacement is installed;
5) concrete support at described beam slab disappearance place is removed.
2. beam slab disappearance place support replacement construction method in foundation pit enclosure structure as claimed in claim 1, it is characterized in that: the first beam slab of constructing above described beam slab disappearance place after described concrete support dismounting, the edge of described first beam slab stays on the surface of described diaphragm wall, the described shaped steel support replacement of dismounting after described first Beam-Slab Construction completes.
3. beam slab disappearance place support replacement construction method in foundation pit enclosure structure as claimed in claim 1, is characterized in that installing described second anchor slab comprises the steps:
1) anchor bar is embedded in advance described first ring beam inner;
2) described second anchor slab is fitted in the side of described first ring beam, and use the technique of pressure arc slugging that described second anchor slab is welded in described anchor bar.
4. beam slab disappearance place support replacement construction method in foundation pit enclosure structure as claimed in claim 1, is characterized in that installing described first anchor slab comprises the steps:
1) anchor bar is embedded in advance described on return cushion cap inside;
2) described first anchor slab is fitted in described on return the surface of cushion cap, and use the technique of pressure arc slugging that described first anchor slab is welded in described anchor bar.
5. the support replacement at foundation pit enclosure structure beam slab disappearance place, is characterized in that comprising the second anchor slab, the first anchor slab and shaped steel support replacement, wherein:
The sidewall of foundation ditch is provided with diaphragm wall, and the surface of described diaphragm wall is provided with the first ring beam extended in the horizontal direction, and described second anchor slab is fixedly installed in the side of described first ring beam;
Foundation ditch inside is provided with frame column, and the top of described frame column is provided with returns cushion cap, described first anchor slab be fixedly installed in described on return the surface of cushion cap;
One end of described shaped steel support replacement is welded in described second anchor slab, and the other end of described shaped steel support replacement is welded in described first anchor slab.
6. the support replacement at foundation pit enclosure structure beam slab disappearance place as claimed in claim 5, is characterized in that: the height of described first anchor slab is less than the height of described second anchor slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510472080.5A CN105113512A (en) | 2015-08-05 | 2015-08-05 | Bracing substitution at missed place of beam plate in foundation pit support structure and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510472080.5A CN105113512A (en) | 2015-08-05 | 2015-08-05 | Bracing substitution at missed place of beam plate in foundation pit support structure and construction method thereof |
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| CN105113512A true CN105113512A (en) | 2015-12-02 |
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| CN201510472080.5A Pending CN105113512A (en) | 2015-08-05 | 2015-08-05 | Bracing substitution at missed place of beam plate in foundation pit support structure and construction method thereof |
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| CN110318403A (en) * | 2019-07-15 | 2019-10-11 | 重庆建工第七建筑工程有限责任公司 | A kind of deep basal pit inner support assembled support replacement construction tool and construction method |
| CN110644499A (en) * | 2019-09-23 | 2020-01-03 | 中天建设集团有限公司 | Construction tool and construction method for asynchronous construction conversion support of foundation pit |
| CN114086596A (en) * | 2021-11-17 | 2022-02-25 | 中天建设集团有限公司 | Detachment-free support changing construction method for underground roof construction |
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Cited By (3)
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|---|---|---|---|---|
| CN110318403A (en) * | 2019-07-15 | 2019-10-11 | 重庆建工第七建筑工程有限责任公司 | A kind of deep basal pit inner support assembled support replacement construction tool and construction method |
| CN110644499A (en) * | 2019-09-23 | 2020-01-03 | 中天建设集团有限公司 | Construction tool and construction method for asynchronous construction conversion support of foundation pit |
| CN114086596A (en) * | 2021-11-17 | 2022-02-25 | 中天建设集团有限公司 | Detachment-free support changing construction method for underground roof construction |
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