CN103255772A - Construction method optimizing deep foundation pit changing supporting construction sequences - Google Patents
Construction method optimizing deep foundation pit changing supporting construction sequences Download PDFInfo
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- CN103255772A CN103255772A CN2013102000016A CN201310200001A CN103255772A CN 103255772 A CN103255772 A CN 103255772A CN 2013102000016 A CN2013102000016 A CN 2013102000016A CN 201310200001 A CN201310200001 A CN 201310200001A CN 103255772 A CN103255772 A CN 103255772A
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Abstract
The invention relates to a construction method optimizing deep foundation pit changing supporting construction sequences. Top-down method sequence construction is adopted, and a supporting structural system of a foundation pit is formed by a drill hole potting supporting pile and a waterproof curtain. When foundation pit grooving is carried out, an original soil layer below a changing supporting structure is reserved, after the foundation pit grooving and construction of foundation brick dies are completed, the changing supporting structure and a cushion layer are poured simultaneously, the changing supporting structure and the foundation brick dies are utilized at the same time to serve as a bottom plate outer die, pouring of a foundation mat is carried out when waterproof construction is finished, and an upper part horizontal supporting structure can be dismantled when both strength of the changing supporting structure and strength of concrete of the foundation mat reach strength when the horizontal supporting structure can be dismantled. The construction method optimizing the deep foundation pit changing supporting construction sequences has the advantages of eliminating cleaning of sundries and back-fill consolidation soil operation construction, shortening a construction period, and reducing risks of the foundation pit.
Description
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Technical field
The present invention relates to a kind of deep foundation ditch support replacement job practices, relate in particular to a kind of job practices of optimizing deep foundation ditch support replacement sequence of construction, belong to technical field of building construction.
Background technology
Along with the quickening of China's urbanization construction speed, land resources demand growing tension, in order to take full advantage of land use area, building is developed in depth and breadth to underground, thereby enters the deep foundation ditch job execution.Need to accelerate the construction speed of deep foundation ditch in the work progress of deep foundation ditch, reduce the foundation ditch risk.
Support replacement in the base pit engineering, it is the inner supporting structure system of taking certain technical measures progressively to replace under given conditions to bring into play interim supporting role, thereby after guaranteeing provisional interior supporting removal, engineering construction can continue safety and successfully carry out, and its essence is safe and orderly adjustment, transfer and the reallocation of stress.
When deep foundation ditch was nearer apart from existing building, the supporting braced structures system of foundation ditch adopted the supporting braced structures system of the composition that water-stop curtain+drill-pouring soldier pile+concrete horizontal supports usually.In the support replacement work progress in the above-mentioned supporting braced structures system, after the foundation ditch fluting finishes, for preventing that the resilience of the deep foundation ditch shoveling back substrate soil body is excessive and reduce the foundation ditch rebound deformation, its effective measures that prevent are to reduce the variation of effective stress in the soil body and reduce open-assembly time., dig to design foundation ditch substrate absolute altitude in the foundation ditch substrate for this reason, build bed course and sole plate as early as possible, carry out the support replacement construction after sole plate is built and finished.In this construction technology process, the sequence of construction of support replacement and progress thereof are determining the time started of upper level supporting removal and the construction of post wall beam plate.This shows that the sequence of construction of support replacement and progress thereof play an important role to shortening the foundation construction progress and reducing the foundation ditch risk.
Tradition support replacement job practices, its sequence of construction comprises the support replacement structure construction of sole plate and the support replacement structure between sole plate and the supporting and protection structure, the support replacement structure construction of described sole plate, it is the support replacement structure construction that between supporting and protection structure and sole plate outward flange, installs basic stock mould after-pouring concrete floor, support replacement structure between described sole plate and the supporting and protection structure, refer to carry out after sole plate is finished the support replacement structure between sole plate and the supporting and protection structure, during comprise foreign material cleaning between sole plate and the supporting and protection structure, the backfill compacting, build the concrete support replacement above the backfill.Treat that the prescribed strength that support replacement reaches in the time of can removing braced structures carries out the dismounting of upper level braced structures and the construction of post wall beam plate again, treats that carrying out the water jacket earth backing after waterproof construction all finishes reaches safe location.
The method of tradition support replacement sequence of construction, its shortcoming is: 1, the space is little between sole plate edge and the supporting and protection structure, and cleaning foreign material and backfilling compaction soil constructing operation are all very difficult.2, the support replacement concrete strength is often lower, waits for that its time that reaches prescribed strength is longer.
Therefore, how optimizing the construction of support replacement sequence of construction, is the technical problem that those skilled in the art press for solution.
Summary of the invention
Purpose of the present invention, aim to provide a kind of job practices of optimizing deep foundation ditch support replacement sequence of construction, this job practices, can exempt and clear up foreign material and backfilling compaction geotechnique order, the support replacement concrete strength is higher, wait for that its time that reaches prescribed strength is shorter, accelerated the support replacement construction speed, thereby overcome the shortcoming that exists in the prior art.
The present invention for achieving the above object, the technical scheme that adopts is:
A kind of job practices of optimizing deep foundation ditch support replacement sequence of construction, it is characterized in that: adopt the contrary sequence method sequence construction, the supporting structure system of foundation ditch is made up of drill-pouring soldier pile and water-stop curtain, former soil layer when foundation ditch is slotted below the reservation support replacement structure, after foundation ditch fluting and basic stock mould are built by laying bricks or stones and are finished, build support replacement structure and bed course simultaneously, utilize support replacement structure and basic stock mould simultaneously as the base plate external mold, treat that carrying out sole plate after waterproof construction finishes builds, the concrete intensity of support structure to be changed and sole plate all reaches in the intensity that can remove horizontal support structure, just dismountable upper level braced structures.
Beneficial effect of the present invention
Compared with prior art, the significant beneficial effect that has of the present invention is as follows:
1, fluting is reserved former soil layer between sole plate edge and the enclosed structure, has saved the time of cleaning foreign material and the operation of backfilling compaction soil.
2, because the support replacement concrete strength is lower than underplate concrete intensity, sole plate is that concrete in mass reaches the time of requirement of strength early than the support replacement concrete, therefore insert support replacement engineering time, construction flow process in advance, saved and waited for that support replacement reaches the time of intensity, and then shifted to an earlier date insertion time of upper level supporting removal and post wall beam plate construction, shorten the duration, reduced the foundation ditch risk.
Description of drawings
Fig. 1 is the supporting structure system schematic diagram after the present invention optimizes the construction of deep foundation ditch support replacement sequence of construction;
Fig. 2 be after the construction of traditional deep foundation ditch support replacement the supporting structure system schematic diagram.
Among Fig. 1: 1 horizontal support structure; 2 braced structuress; 3 sole plates; 4 bed courses; 5 former soil layers; 6 basic stock moulds; 8 drill-pouring soldier piles; 9 water-stop curtains.
Among Fig. 2: 1 horizontal support structure; 2 braced structuress; 3 sole plates; 4 bed courses; 5 former soil layers; 6 basic stock moulds; The cleaning of 7 foreign material and tamped backfill; 8 drill-pouring soldier piles; 9 water-stop curtains.
The specific embodiment
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is described in further detail below in conjunction with accompanying drawing and most preferred embodiment.
Embodiment
Referring to Fig. 1, a kind of job practices of optimizing deep foundation ditch support replacement sequence of construction, adopt the contrary sequence method sequence construction, the supporting structure system of foundation ditch is made up of drill-pouring soldier pile 8 and water-stop curtain 9, former soil layer 5 when foundation ditch is slotted below the reservation support replacement structure 2, after foundation ditch fluting and basic stock mould 6 are built by laying bricks or stones and are finished, build support replacement structure 2 and bed course 4 simultaneously, utilize support replacement structure 2 and basic stock mould 6 simultaneously as the base plate external mold, treat that carrying out sole plate 3 after waterproof construction finishes builds, support structure 2 to be changed all reaches in the intensity that can remove horizontal support structure 1 with sole plate 3 concrete intensity, just dismountable upper level braced structures 1.
In the present invention, as shown in Figure 2, in traditional support replacement job practices, being positioned at plinth base plate 3 edges is the space 7 of clearing up foreign material and backfilling compaction soil with forming the supporting and protection structure space by drill-pouring soldier pile 8 and water-stop curtain 9.
In the present invention, described contrary sequence method (top-down method) sequence construction, be utilize the main body underground structure all or part of as supporting and protection structure, construction from top to bottom.
The above only is preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (1)
1. job practices of optimizing deep foundation ditch support replacement sequence of construction, it is characterized in that: adopt the contrary sequence method sequence construction, the supporting structure system of foundation ditch is made up of drill-pouring soldier pile (8) and water-stop curtain (9), when slotting, foundation ditch reserves the former soil layer (5) of support replacement structure (2) below, after foundation ditch fluting and basic stock mould (6) are built by laying bricks or stones and are finished, build support replacement structure (2) and bed course (4) simultaneously, utilize support replacement structure (2) and basic stock mould (6) simultaneously as the base plate external mold, treating to carry out after waterproof construction finishes sole plate (3) builds, support structure to be changed (2) all reaches in the intensity that can remove horizontal support structure (1) with the concrete intensity of sole plate (3), just dismountable upper level braced structures (1).
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| CN2013102000016A CN103255772A (en) | 2013-05-27 | 2013-05-27 | Construction method optimizing deep foundation pit changing supporting construction sequences |
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| CN2013102000016A CN103255772A (en) | 2013-05-27 | 2013-05-27 | Construction method optimizing deep foundation pit changing supporting construction sequences |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469798A (en) * | 2013-08-28 | 2013-12-25 | 中国建筑第七工程局有限公司 | Pit support structure and construction method thereof |
| CN103590405A (en) * | 2013-10-25 | 2014-02-19 | 上海建工四建集团有限公司 | Foundation pit construction method |
| CN103603360A (en) * | 2013-11-27 | 2014-02-26 | 上海建工七建集团有限公司 | Foundation pit enveloping method |
| CN103711128A (en) * | 2013-12-31 | 2014-04-09 | 上海建工七建集团有限公司 | Construction method for shallow foundation structural beam slab |
| CN104234082A (en) * | 2014-08-29 | 2014-12-24 | 中国电建集团华东勘测设计研究院有限公司 | Jump-layer reversed construction method for deep foundation pit |
| 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 |
| CN104631467A (en) * | 2015-03-11 | 2015-05-20 | 中国建筑第八工程局有限公司 | Method for erecting L-shaped support replacement plate for foundation pit excavation project |
| CN105821886A (en) * | 2015-01-04 | 2016-08-03 | 中天建设集团有限公司 | Method using box mold to serve as uneven-bottom support beam system moulding bed |
| CN106193047A (en) * | 2015-04-07 | 2016-12-07 | 罗海军 | Big width base pit stand construction |
| CN109371982A (en) * | 2018-12-07 | 2019-02-22 | 武汉丰达地质工程有限公司 | A kind of construction method of basement bottom board support replacement |
| CN110485432A (en) * | 2019-07-30 | 2019-11-22 | 中建三局第一建设工程有限责任公司 | A kind of foundation pit tears support body system optimization method and its system open |
| CN112726624A (en) * | 2020-12-15 | 2021-04-30 | 上海建工集团股份有限公司 | Efficient excavation construction method for deep foundation pit |
| CN115787672A (en) * | 2023-02-10 | 2023-03-14 | 中国建筑一局(集团)有限公司 | Asynchronous support changing construction method for ultra-large area deep foundation pit in complex environment |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103469798B (en) * | 2013-08-28 | 2016-01-20 | 中国建筑第七工程局有限公司 | A kind of foundation pit supporting construction and construction method thereof |
| CN103469798A (en) * | 2013-08-28 | 2013-12-25 | 中国建筑第七工程局有限公司 | Pit support structure and construction method thereof |
| CN103590405A (en) * | 2013-10-25 | 2014-02-19 | 上海建工四建集团有限公司 | Foundation pit construction method |
| CN103603360A (en) * | 2013-11-27 | 2014-02-26 | 上海建工七建集团有限公司 | Foundation pit enveloping method |
| CN103711128A (en) * | 2013-12-31 | 2014-04-09 | 上海建工七建集团有限公司 | Construction method for shallow foundation structural beam slab |
| CN104234082A (en) * | 2014-08-29 | 2014-12-24 | 中国电建集团华东勘测设计研究院有限公司 | Jump-layer reversed construction method for deep foundation pit |
| CN104328789B (en) * | 2014-10-31 | 2016-04-13 | 天津三建建筑工程有限公司 | The overhanging type support replacement construction method of the horizontal inner support of a kind of steel concrete |
| 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 |
| CN105821886A (en) * | 2015-01-04 | 2016-08-03 | 中天建设集团有限公司 | Method using box mold to serve as uneven-bottom support beam system moulding bed |
| CN104631467A (en) * | 2015-03-11 | 2015-05-20 | 中国建筑第八工程局有限公司 | Method for erecting L-shaped support replacement plate for foundation pit excavation project |
| CN106193047A (en) * | 2015-04-07 | 2016-12-07 | 罗海军 | Big width base pit stand construction |
| CN106193047B (en) * | 2015-04-07 | 2018-04-03 | 罗海军 | Big width base pit stand construction |
| CN109371982A (en) * | 2018-12-07 | 2019-02-22 | 武汉丰达地质工程有限公司 | A kind of construction method of basement bottom board support replacement |
| CN110485432A (en) * | 2019-07-30 | 2019-11-22 | 中建三局第一建设工程有限责任公司 | A kind of foundation pit tears support body system optimization method and its system open |
| CN110485432B (en) * | 2019-07-30 | 2022-03-15 | 中建三局第一建设工程有限责任公司 | Foundation pit support removing system optimization method and system |
| CN112726624A (en) * | 2020-12-15 | 2021-04-30 | 上海建工集团股份有限公司 | Efficient excavation construction method for deep foundation pit |
| CN112726624B (en) * | 2020-12-15 | 2023-03-31 | 上海建工集团股份有限公司 | Efficient excavation construction method for deep foundation pit |
| CN115787672A (en) * | 2023-02-10 | 2023-03-14 | 中国建筑一局(集团)有限公司 | Asynchronous support changing construction method for ultra-large area deep foundation pit in complex environment |
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Application publication date: 20130821 |