CN103114594B - Supporting structure of adjacent two foundation trenches and construction method thereof - Google Patents
Supporting structure of adjacent two foundation trenches and construction method thereof Download PDFInfo
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- CN103114594B CN103114594B CN201310071026.0A CN201310071026A CN103114594B CN 103114594 B CN103114594 B CN 103114594B CN 201310071026 A CN201310071026 A CN 201310071026A CN 103114594 B CN103114594 B CN 103114594B
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- 238000010276 construction Methods 0.000 title claims abstract description 47
- 239000002689 soil Substances 0.000 claims abstract description 52
- 239000004568 cement Substances 0.000 claims abstract description 45
- 239000004567 concrete Substances 0.000 claims description 55
- 229910000831 Steel Inorganic materials 0.000 claims description 39
- 239000010959 steel Substances 0.000 claims description 39
- 239000011150 reinforced concrete Substances 0.000 claims description 20
- 238000005266 casting Methods 0.000 claims description 10
- 230000002787 reinforcement Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 238000009412 basement excavation Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- IXHBTMCLRNMKHZ-LBPRGKRZSA-N levobunolol Chemical compound O=C1CCCC2=C1C=CC=C2OC[C@@H](O)CNC(C)(C)C IXHBTMCLRNMKHZ-LBPRGKRZSA-N 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a supporting structure of adjacent two foundation trenches. The supporting structure of the adjacent two foundation trenches comprises two adjacent foundation trenches and a middle soil body (1), two sides, closed to the two foundation trenches, of the middle earth body (1) are respectively provided with a row of continuous first cement mixing piles (2), and a row of continuous second cement mixing piles (3) are arranged between two rows of continuous first cement mixing piles (2) at every certain distance. The invention further discloses a construction method of the supporting structure of the adjacent two foundation trenches. The key steps of method comprises: pouring two rows of continuous first cement mixing piles (2) on two sides of the middle earth body (1), and pouring a row of continuous second cement mixing piles (3) between the two rows of continuous first cement mixing piles (2) at every certain distance. The supporting structure of the adjacent two foundation trenches and the construction method of the supporting structure of the adjacent two foundation trenches can save materials, reduce cost, shorten work period, does not need to consider the lateral pressure balance of the earth body, and does not need the construction process of two foundation trenches to be synchronous.
Description
Technical field
The present invention relates to building field, is specifically a kind of supporting and protection structure and construction method thereof of two the adjacent foundation ditches be applicable in weak soil environment.
Background technology
The supporting and protection structure of traditional single foundation ditch comprises the fender post of the circle steel concrete arranged along margin of foundation pit, the stake top of each fender post is provided with capping beam, the inner support of same absolute altitude is provided with between each capping beam, fender post is provided with one deck every certain altitude and encloses purlin, each of same layer encloses the inner support being also provided with same absolute altitude between purlin; Above-mentioned fender post, capping beam, enclose the integer support structure that purlin and each inner support constitute foundation ditch.
In urban architecture; because land used is nervous; often there will be the foundation ditch of the basement of two buildings apart from close situation; in general; if when the distance between two foundation ditches is less than 3 times of foundation ditch digging depth; just must consider having influenced each other when two Adjacent Pits are constructed, two above-mentioned foundation ditches just can think Adjacent Pit.
The supporting and protection structure of two adjacent foundation ditches of prior art comprises two independences and complete foundation pit supporting system, in other words each foundation ditch is provided with separately complete foundation pit supporting system, namely each foundation ditch have a complete set of steel concrete fender post, capping beam, enclose purlin and inner support etc., and, for reducing influencing each other when Adjacent Pit is constructed, multiple tracks connection beam has also been poured into a mould in the soil body between two foundation ditches, armored concrete slab has also been poured into a mould on the top of connection beam, makes two foundation pit supporting constructions form complete monolithic construction.There is following defect in the supporting and protection structure of two adjacent foundation ditches of prior art: because each foundation ditch is provided with complete support system, namely the edge of each foundation ditch is equipped with the fender post of a complete circle reinforced concrete structure, and be all provided with inner support between a circle four capping beams, also be provided with inner support between the four rhizosphere purlins of every layer, thus material consumption is large, construction cost is high, long in time limit, and, because the soil body between two foundation ditches is less, and the soil body of two foundation ditch both sides is more, therefore each foundation ditch can produce a soil body lateral pressure to Adjacent Pit, in work progress, each step will keep two soil body side pressure equilibrium of forces moment, like this, just make the necessary Complete Synchronization of the construction sequence of two foundation ditches, as two foundation ditches will excavate simultaneously, the degree of depth of excavation is identical, the progress of excavation is also identical, can not one dig 30 meters another just dig 20 meters, and cast outer wall of basement to carry out the progress of alternative inner support in exterior wall steel support replacement also identical in two foundation ditches, foundation ditch can not pour into a mould the outer wall of basement of 5 meters and replaced steel support replacement and another foundation ditch just pours into a mould 3 meters, and the moment calculates and the process keeping soil body lateral pressure to balance is loaded down with trivial details, and once accidentally occur the security incident that soil body lateral pressure imbalance just may cause support system displacement even to be caved in, in addition, in practice of construction process, two Adjacent Pits often adhere to different units in charge of construction separately, coordinate different unit in charge of construction, it is made to keep the synchronism of work progress very difficult.
In prior art, in order to avoid the loaded down with trivial details soil body lateral pressure balance calculating and consider, two foundation ditches large foundation ditch is integrally considered, the soil body in the middle of two foundation ditches is also dug out simultaneously, to construct out an overall large foundation pit supporting construction, then water and outpour two foundation ditches outer wall of basement separately, finally use the gap of earthen backfill two outer wall of basement, although above-mentioned form of construction work considers soil body side pressure equilibrium of forces without the moment, but need the soil body dug up between two foundation ditches more, by must again backfill after having constructed, working strength is large, construction cost is high, and, in work progress, the soil body between two foundation ditches was can as piling putting material temporarily originally, driving or the platform be unearthed, dig up the beta site that this part soil body just loses this part, make natively hard up construction land tenure more nervous, finally, using two foundation ditches as a foundation pit construction, require higher to the synchronism of different unit in charge of construction, adhere to two foundation ditches of different unit in charge of construction separately, the coordinating and unifying is very difficult.
Summary of the invention
The technical problem that the present invention will solve is, provide a kind of and can save material, reduce costs, the reduction of erection time, without the need to considering soil body lateral pressure balance and not requiring the supporting and protection structure of two adjacent foundation ditches of two foundation pit construction course synchronization.
A technical solution of the present invention is, a kind of supporting and protection structure of two adjacent foundation ditches is provided, it comprises the middle soil body between two adjacent foundation ditches and two foundation ditches, the middle soil body and close two sides of two foundation ditches are respectively provided with row's continuous print first cement mixing pile, and two ranked first between cement mixing pile and are provided with row's continuous print second cement mixing pile at a certain distance; In each foundation ditch except with the immediate side of the middle soil body except other side be provided with the fender post of steel concrete, the stake top of each fender post is provided with capping beam, inner support is provided with between each capping beam, fender post is provided with one deck every certain altitude and encloses purlin, enclosing between purlin of same layer is provided with inner support.
Another technical problem that the present invention will solve is, provide a kind of and can save material, reduce costs, the reduction of erection time, without the need to considering soil body lateral pressure balance and not requiring the construction method of the supporting and protection structure of two adjacent foundation ditches of two foundation pit construction course synchronization.
Another technical solution of the present invention is, a kind of construction method of supporting and protection structure of two adjacent foundation ditches is provided, its construction sequence comprises: in each foundation ditch except with the immediate side of the middle soil body except other side sink to the fender post of steel concrete, and note capping beam in the stake top casting of each fender post, and inner support is poured into a mould between each capping beam, and at the both sides of middle soil body cast two row continuous print first cement mixing piles, and ranked first between cement mixing pile two and pour into a mould row's continuous print second cement mixing pile at a certain distance.
The supporting and protection structure of two foundation ditches that the present invention is adjacent and construction method compared with prior art, have following remarkable advantage and beneficial effect:
First, the fender post of the steel concrete that cost is high, consumptive material is large, long in time limit is no longer adopted with the immediate side of the middle soil body in each foundation ditch, but low by cost, do not consume the fast cement mixing pile of reinforcing bar, speed of application and replace, therefore reduce cost, saving material, reduction of erection time, and, this side of each foundation ditch no longer pours into a mould capping beam and each layer encloses purlin, reduces cost, reduction of erection time further, more crucially, cement mixing pile is ranked first because the middle soil body is provided with two, two ranked first to be provided with again between cement mixing pile and ranked second cement mixing pile more, therefore increased substantially intensity and the hardness of the middle soil body, make it the free-standing structure defining gravity, popular says, middle soil body concretize, and simultaneously, in each foundation ditch except with the immediate side of the middle soil body except other side be generally three sides and be all still provided with capping beam, fender post and enclose purlin, three capping beams, every Ceng tri-road encloses between purlin and is provided with inner support, like this, four sides of a foundation ditch, concretize, the soil body lateral pressure that the side of two other symmetry is original balances, and the soil body lateral pressure of last side encloses purlin inner support and capping beam inner support through each and two symmetrical sides counteract, so, the soil body lateral pressure of two Adjacent Pits no longer influences each other, so not only eliminate calculating and the verification of numerous and diverse soil body lateral pressure repeatedly, simplify work progress, improve speed of application, avoid the displacement because soil pressure imbalance causes, cave-in accident, and, the construction sequence of two foundation ditches no longer requires the coordinating and unifying, as long as complete the construction of each cement mixing pile of the middle soil body, two foundation ditches are free to completely go to carry out according to the construction speed of each unit in charge of construction and construction requirement, two synchronized constraints of foundation pit construction are thoroughly broken away from, easy construction, and without the need to diging up the middle soil body as second method, again backfill again after construction terminates, reduction of expenditure, time saving and energy saving.
As improvement, two placing of reinforcement concrete columns are provided with in the middle soil body, often arrange concrete column top and be provided with a steel concrete main beam, one secondary crossbeam of steel concrete is provided with at a certain distance between two steel concrete main beams, two steel concrete main beams and the secondary crossbeam of Duo Gen steel concrete constitute reinforced concrete frame, and reinforced concrete frame upper has concrete trestle plate.
The construction sequence implementing this improvement is: after the first cement mixing pile and the second cement mixing pile driving construction, construction reinforced bar concrete column in the middle soil body, at reinforced concrete upright column top casting reinforced concrete main beam, the secondary crossbeam of casting reinforced concrete between steel concrete main beam, then at the reinforced concrete frame upper concrete trestle plate be made up of steel concrete main beam and the secondary crossbeam of steel concrete.
Above structure improvement and the improvement of construction method, increase intensity and the bearing capacity of the middle soil body, and steel concrete trestle plate can, as temporary construction land used, be used for piling putting material, driving or providing unearthed platform for excavating foundation ditch, therefore convenient and practical.
Accompanying drawing explanation
Fig. 1 is the plan structure schematic diagram of the supporting and protection structure of two foundation ditches that the present invention is adjacent.
Fig. 2 is the side-looking structural representation of the supporting and protection structure of two foundation ditches that the present invention is adjacent.
Shown in figure 1, the middle soil body, the 2, first cement mixing pile, the 3, second cement mixing pile, 4, fender post, 5, capping beam, 6, inner support, 7, enclose purlin, 8, reinforced concrete upright column, 9, steel concrete main beam, 10, the secondary crossbeam of steel concrete, 11, concrete trestle plate.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1 and Figure 2, the supporting and protection structure of two foundation ditches that the present invention is adjacent, it comprises the middle soil body 1 between two adjacent foundation ditches and two foundation ditches.The middle soil body 1 two sides close with two foundation ditches be respectively provided with row's continuous print first cement mixing pile 2, two to ranked first between cement mixing pile 2 at a certain distance as 5 meters be provided with row's continuous print second cement mixing pile 3.In other words, two ranked first and to be provided with many row's continuous print second cement mixing piles 3 between cement mixing pile 2, often arrange all vertical with the first cement mixing pile 2 often arranged and the cement mixing pile 2 that ranked first with two respectively that often ranked second two second cement mixing piles 3 in two ends of cement mixing pile 3 of continuous print second cement mixing pile 3 and push against.In each foundation ditch except with the immediate side of the middle soil body 1 except other side be equipped with the fender post 4 of steel concrete.In other words, except ranked first with one the fender post 4 that parallel and other side except that side contacted of cement mixing pile 2 is provided with steel concrete in each foundation ditch, in particular, the outermost side of each exactly foundation ditch also have two symmetrical sides totally three sides be equipped with fender post 4.The stake top of each fender post 4 is provided with capping beam 5.Inner support 6 is provided with between three capping beams 5.Fender post 4 is provided with one deck every certain altitude and encloses purlin 7, three roads of same layer enclose between purlin 7 and are provided with inner support 6.Two placing of reinforcement concrete columns 8 are provided with in the middle soil body 1, every placing of reinforcement concrete column 8 top is provided with a steel concrete main beam 9, at a certain distance as being provided with secondary crossbeam 10, the two steel concrete main beams 9 of one steel concrete and the secondary crossbeam 10 of Duo Gen steel concrete constitutes reinforced concrete frame every 8 meters between two steel concrete main beams 9.Reinforced concrete frame upper has concrete trestle plate 11.
The construction method of the supporting and protection structure of two foundation ditches that the present invention is adjacent, its construction sequence comprises: in each foundation ditch except with the immediate side of the middle soil body 1 except other side sink to the fender post 4 of steel concrete, and note capping beam 5 in the stake top casting of each fender post 4, and inner support 6 is poured into a mould between each capping beam 5, and at the both sides of the middle soil body 1 cast two row continuous print first cement mixing piles 2, and ranked first between cement mixing pile 2 two and pour into a mould row's continuous print second cement mixing pile 3 at a certain distance.After first cement mixing pile 2 and the second cement mixing pile 3 are constructed, construction reinforced bar concrete column 8 in the middle soil body 1, at reinforced concrete upright column 8 top casting reinforced concrete main beam 9, the secondary crossbeam 10 of casting reinforced concrete between steel concrete main beam 9, then at the reinforced concrete frame upper concrete trestle plate 11 be made up of steel concrete main beam 9 and the secondary crossbeam 10 of steel concrete.After concrete trestle plate 11 casting complete, can according to construction sequence excavation pit same as the prior art, and pour into a mould one deck every certain altitude and enclose purlin 7, every layer is enclosed purlin 7 is three roads, lay respectively on the outermost side of each foundation ditch and two symmetrical sides, then pour into a mould inner support 6 in enclosing between purlin 7 of same layer; Construct after bottom foundation ditch, then basement bottom board of constructing, pour into a mould outer wall of basement etc. from the bottom up.
Claims (4)
1. the supporting and protection structure of adjacent two foundation ditches, it comprises the middle soil body (1) between two adjacent foundation ditches and two foundation ditches, it is characterized in that: the middle soil body (1) two sides close with two foundation ditches are respectively provided with row's continuous print first cement mixing pile (2), two ranked first between cement mixing pile (2) and are provided with row's continuous print second cement mixing pile (3) at a certain distance; In each foundation ditch except with the middle soil body (1) immediate side except other side be provided with the fender post (4) of steel concrete, the stake top of each fender post (4) is provided with capping beam (5), inner support (6) is provided with between each capping beam (5), fender post (4) is provided with one deck every certain altitude and encloses purlin (7), enclosing between purlin (7) of same layer is provided with inner support (6).
2. the supporting and protection structure of two adjacent foundation ditches according to claim 1, it is characterized in that: in the middle soil body (1), be provided with two placing of reinforcement concrete columns (8), every placing of reinforcement concrete column (8) top is provided with a steel concrete main beam (9), one secondary crossbeam (10) of steel concrete is provided with at a certain distance between two steel concrete main beams (9), two steel concrete main beams (9) and the many secondary crossbeams (10) of steel concrete constitute reinforced concrete frame, reinforced concrete frame upper has concrete trestle plate (11).
3. the construction method of the supporting and protection structure of adjacent two foundation ditches, it is characterized in that: its construction sequence comprises: in each foundation ditch except with the middle soil body (1) immediate side except other side sink to the fender post (4) of steel concrete, and note capping beam (5) in the stake top casting of each fender post (4), and inner support (6) is poured into a mould between each capping beam (5), and the both sides of the middle soil body (1) cast two row's continuous print first cement mixing pile (2), and ranked first between cement mixing pile (2) two and pour into a mould row's continuous print second cement mixing pile (3) at a certain distance.
4. the construction method of the supporting and protection structure of two adjacent foundation ditches according to claim 3, it is characterized in that: after the first cement mixing pile (2) and the second cement mixing pile (3) are constructed, construction reinforced bar concrete column (8) in the middle soil body (1), on reinforced concrete upright column (8) top casting reinforced concrete main beam (9), the secondary crossbeam (10) of casting reinforced concrete between steel concrete main beam (9), again at reinforced concrete frame upper concrete trestle plate (11) be made up of steel concrete main beam (9) and the secondary crossbeam (10) of steel concrete.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310071026.0A CN103114594B (en) | 2013-03-06 | 2013-03-06 | Supporting structure of adjacent two foundation trenches and construction method thereof |
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| CN201310071026.0A CN103114594B (en) | 2013-03-06 | 2013-03-06 | Supporting structure of adjacent two foundation trenches and construction method thereof |
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| CN103114594B true CN103114594B (en) | 2014-12-17 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110158600B (en) * | 2019-06-05 | 2021-07-06 | 浙江交工集团股份有限公司 | Construction method for synchronous excavation and asynchronous backfilling of adjacent foundation pits |
| CN115387344B (en) * | 2022-08-19 | 2023-09-12 | 中建三局第三建设工程有限责任公司 | A rapid construction method for double foundation pits and double working conditions |
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Effective date of registration: 20160505 Address after: 315020, No. 40, Pagoda Road, Jiangbei District, Zhejiang, Ningbo Patentee after: Ningbo civil building design and Research Institute Co Ltd Address before: 315020, No. 40, Pagoda Road, Jiangbei District, Zhejiang, Ningbo Patentee before: Xiong Chuyan |
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Granted publication date: 20141217 Termination date: 20190306 |