A kind of foundation ditch recoverable concrete support
This utility model belongs to technical field of building construction, and in particular to a kind of foundation ditch recoverable concrete support.
With the quickening of China's infrastructure construction, in city incity, base pit engineering is more and more, and foundation ditch is subject to perimeter bar
Part is limited, and cannot be adopted substantially slope digging mode, mostly be selected vertical type building enclosure（Diaphram wall or drilled pile）+ interior
Support as foundation pit supporting system.Conventional inner support has reinforced concrete support and steel pipe support, reinforced concrete support rigidity
Greatly, control deform, can resistance to compression, also can shearing resistance, it is safe, but which is performed often by cast-in-place mode, and later stage need
Cut, cause that its working procedure is loaded down with trivial details, the construction period is longer, investment is larger；Steel pipe support sets up speed soon, repeats and utilizes,
But rigidity is little, can only resistance to compression, it is impossible to shearing resistance, therefore foundation pit enclosure structure selects first support to adopt concrete support mostly, its
Remaining support adopts bracing members, and it is cast-in-place that this still can not solve concrete support, needs to wait for excavate after its intensity reaches requirement
Foundation ditch, and the later stage to cut, it is impossible to the problem of recycling.
Utility model content
In order to solve the above problems, this utility model is there is provided a kind of first concrete of reusable foundation ditch
The technical scheme adopted by this utility model for：
A kind of foundation ditch recoverable concrete support, it is characterised in that including precast support, building enclosure, central post, company
Binder, is provided with the standard paragraphs that are sequentially connected and its two ends is connected with junction in the middle part of the precast support, described adjacent
Standard paragraphs between, be connected by banjo fixing butt jointing between the standard paragraphs of end and junction；The top at the building enclosure two ends
Portion is provided with supporting termination corresponding with junction, and shearing resistance draw-in groove is provided with the supporting termination, and the junction is arranged
In shearing resistance draw-in groove, the shearing resistance draw-in groove, the gap position of junction are filled by micro-expansion cement；Arrange on the central post
There is linking beam, the linking beam is arranged at the lower section of precast support.
The central post is arranged at the middle part of the precast support.
Suspension hook is provided with the standard paragraphs, junction.
The building enclosure is diaphram wall or drilled pile.
The periphery of the banjo fixing butt jointing is provided with steel plate, the steel plate patch merga pass connecting bolt fastening of adjacent banjo fixing butt jointing
The banjo fixing butt jointing is internally provided with dowel, and adjacent banjo fixing butt jointing anchored by dowel.
The beneficial effects of the utility model are：
Precast concrete supports recyclable recycling, saves construction costs, while can also make first concrete of foundation ditch
Support participates in structure stress as early as possible, shortens the excavation of foundation pit time.
Description of the drawings
Fig. 1 is precast concrete support drawing in side sectional elevation in this utility model；
Fig. 2 is supported end cephalomere point diagram in this utility model；
Fig. 3 is A-A profiles in Fig. 1；
Fig. 4 is B-B profiles in Fig. 1；
Fig. 5 is C-C profiles in Fig. 4.
The utility model is described in further detail below in conjunction with the accompanying drawings：
In Fig. 1-5,1-standard paragraphs；2-junction；3-banjo fixing butt jointing；4-supporting termination；5-shearing resistance draw-in groove；6-micro-
Expanding cement；7-central post；8-linking beam；9-suspension hook；10-building enclosure；11-excavation of foundation pit face；12-steel plate；
As Figure 1-5, a kind of foundation ditch recoverable concrete support, including precast support, building enclosure 10, central post
7th, linking beam 8, are provided with the standard paragraphs 1 that are sequentially connected and its two ends are connected with junction 2 in the middle part of precast support, adjacent
It is connected by banjo fixing butt jointing 3 between standard paragraphs 1, between the standard paragraphs 1 of end and junction 2；The top at 10 two ends of building enclosure
Portion is provided with and 2 corresponding supporting termination 4 of junction, and supporting is provided with shearing resistance draw-in groove 5 on termination 4, and junction 2 is arranged at anti-
Cut in draw-in groove 5, shearing resistance draw-in groove 5, the gap position of junction 2 are filled by micro-expansion cement 6；It is provided with central post 7 and links
Beam 8, linking beam 8 are arranged at the lower section of precast support.
Central post 7 is arranged at the middle part of precast support.
Suspension hook 9 is provided with standard paragraphs 1, junction 2.
Building enclosure 10 is diaphram wall or drilled pile.
The periphery of banjo fixing butt jointing 3 is provided with steel plate 12, the patch merga pass of steel plate 12 connecting bolt 13 of adjacent banjo fixing butt jointing 3
Banjo fixing butt jointing 3 is internally provided with dowel 14, and adjacent banjo fixing butt jointing 3 anchored by dowel 14.
Specific construction step is as follows：
1st, first concrete support is divided into by some standard paragraphs 1 and two ends junction 2 according to foundation ditch width；
2nd, construction foundation pit building enclosure 10（Diaphram wall or drilled pile）And central post 7, while being segmented precast concrete
Support, and embedded joint docking built-in fitting, support lifting built-in fitting；
3rd, foundation ditch Guan Liang is poured, while pouring supporting termination 4 and shearing resistance draw-in groove 5, Grouting Pipe is buried；
4th, set up first support linking beam 8；
5th, design slotting excavation pit at Support Position bottom surface absolute altitude is supported to first；
6th, erecting concrete support, and docking will be supported integral；
7th, space micro-expansion cement 6 between shearing resistance draw-in groove 5 and supporting termination 4 and precast concrete support is filled into closely knit,
Formed can resistance to compression, again can tension support system.
After the completion of foundation pit construction, precast concrete supports detachable recycling.
Above 1 embodiment of the present utility model is described in detail, but the content is only of the present utility model
Preferred embodiment, it is impossible to be considered as limiting practical range of the present utility model.It is all to be made according to this utility model application range
Impartial change with improve etc., still all should belong within patent covering scope of the present utility model.