CN103114594A - 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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- CN103114594A CN103114594A CN2013100710260A CN201310071026A CN103114594A CN 103114594 A CN103114594 A CN 103114594A CN 2013100710260 A CN2013100710260 A CN 2013100710260A CN 201310071026 A CN201310071026 A CN 201310071026A CN 103114594 A CN103114594 A CN 103114594A
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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 job practices thereof that is applicable to two the adjacent foundation ditches in the weak soil environment.
Background technology
The supporting and protection structure of traditional single foundation ditch comprises along the fender post of a circle steel concrete of margin of foundation pit setting, the stake of each fender post is pushed up and is provided with capping beam, be provided with the inner support with absolute altitude between each capping beam, be provided with one deck every certain altitude and enclose purlin on fender post, each of same layer encloses the inner support that also is provided with between purlin with absolute altitude; Above-mentioned fender post, capping beam, enclose the integer support structure that purlin and each inner support have consisted of foundation ditch.
In urban architecture; because land used is nervous; the approaching situation of foundation ditch distance that the basement of two buildings often can occur; in general; if the distance between two foundation ditches is during less than 3 times of foundation ditch digging depth; having influenced each other in the time of just must considering two Adjacent Pit constructions, two above-mentioned foundation ditches just can be thought 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, be each foundation ditch fender post, capping beam of having a complete set of steel concrete, enclose purlin and inner support etc., and, influencing each other when constructing for reducing Adjacent Pit, also poured into a mould multiple tracks contact beam in the soil body between two foundation ditches, armored concrete slab has also been poured into a mould on the top of contact beam, makes two foundation pit supporting constructions form complete monolithic construction.there is following defective in the supporting and protection structure of two adjacent foundation ditches of prior art: because each foundation ditch is provided with complete support system, it is the fender post that the edge of each foundation ditch is equipped with a complete circle reinforced concrete structure, and all be provided with inner support between four capping beams of a circle, also be provided with inner support between the four rhizosphere purlins of every layer, therefore material expends greatly, 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 one to the soil body lateral pressure of Adjacent Pit, in work progress, each step will keep two soil body side pressure equilibrium of forces constantly, like this, just make the necessary Complete Synchronization of construction sequence of two foundation ditches, to excavate simultaneously as two foundation ditches, 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 pour into a mould outer wall of basement and also identical with the progress that the steel support replacement substitutes inner support at exterior wall in two foundation ditches, can not one foundation ditch poured into a mould the outer wall of basement of 5 meters and replaced the steel support replacement and another foundation ditch is just poured into a mould 3 meters, and constantly calculate and keep the process of soil body lateral pressure balance loaded down with trivial details, and in case the uneven security incident that just may cause the support system displacement even to be caved in of soil body lateral pressure accidentally occurs, in addition, two Adjacent Pits often adhere to different units in charge of construction separately in the practice of construction process, coordinate different units in charge of construction, make it keep the synchronism of work progress very difficult.
in prior art, for fear of the calculating of loaded down with trivial details soil body lateral pressure balance with consider, two foundation ditches are made as a whole large foundation ditch to be considered, the soil body in the middle of two foundation ditches is also dug out simultaneously, the large foundation pit supporting construction of the integral body of constructing out, then water and outpour two foundation ditches outer wall of basement separately, use at last the gap of two outer wall of basement of earthen backfill, although above-mentioned form of construction work is the balance of considering soil lateral pressure constantly, but need to dig up two soil bodys between foundation ditch more, the construction complete after by backfill again, working strength is large, construction cost is high, and, in work progress, the soil body between two foundation ditches was to can be used as interim stacking material originally, driving or the platform that is unearthed, dig up this part soil body and just lost the beta site of this part, make original more nervous with regard to hard up construction land tenure, at last, with two foundation ditches as a foundation pit construction, synchronism to different units in charge of construction requires higher, adhere to two foundation ditches of different units 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, provides a kind of and can save material, reduces costs, the reduction of erection time, need not the considering soil lateral pressure balance and do not require the supporting and protection structure of two adjacent foundation ditches that two foundation pit construction processes are synchronous.
A technical solution of the present invention is, a kind of supporting and protection structure of adjacent two foundation ditches is provided, it comprises the middle soil body between two adjacent foundation ditches and two foundation ditches, two close sides of the middle soil body and two foundation ditches respectively are provided with the first continuous cement mixing pile of a row, and two ranked first and are provided with at a certain distance one between cement mixing pile and arrange the second continuous cement mixing pile; In each foundation ditch except with the immediate side of the middle soil body other side be provided with the fender post of steel concrete, the stake of each fender post is pushed up and is provided with capping beam, be provided with inner support between each capping beam, be provided with one deck every certain altitude on fender post and enclose purlin, enclosing of same layer is provided with inner support between purlin.
Another technical problem that the present invention will solve is, provides a kind of and can save material, reduces costs, the reduction of erection time, need not the considering soil lateral pressure balance and do not require the job practices of the supporting and protection structure of two adjacent foundation ditches that two foundation pit construction processes are synchronous.
Another technical solution of the present invention is, a kind of job practices of supporting and protection structure of adjacent two foundation ditches is provided, its construction sequence comprises: in each foundation ditch except with the immediate side of the middle soil body other side sink to the fender post of steel concrete, and annotate capping beam in the stake top casting of each fender post, and pour into a mould inner support between each capping beam, and at the both sides of middle soil body cast two the first continuous cement mixing piles of row, and ranked first two and pour into a mould at a certain distance second a continuous cement mixing pile of row between cement mixing pile.
The supporting and protection structure of two foundation ditches that the present invention is adjacent and job practices compared with prior art have following remarkable advantage and beneficial effect:
at first, no longer adopt the fender post of the steel concrete that cost is high, consumptive material is large, long in time limit in each foundation ditch with the immediate side of the middle soil body, but low with cost, do not consume the fast cement mixing pile of reinforcing bar, speed of application and replace, therefore reduce cost, save material, reduction of erection time, and, this side of each foundation ditch is no longer poured into a mould capping beam and each layer encloses purlin, further reduces cost, reduction of erection time, more crucial is, because being provided with two, the middle soil body ranked first cement mixing pile, 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, made it to form the independent support structure of gravity, popular says, middle soil body concretize, and simultaneously, in each foundation ditch except with the immediate side of the middle soil body other side be generally three sides and all still be provided with capping beam, fender post and enclose purlin, three capping beams, three roads of every layer enclose and are provided with inner support between purlin, like this, four sides of a foundation ditch, a concretize, the original soil body lateral pressure of two other symmetrical side is exactly balance, and the soil body lateral pressure of last side has been offset through the side that each encloses purlin inner support and capping beam inner support and two symmetries, so, the soil body lateral pressure of two Adjacent Pits no longer influences each other, so not only omitted numerous and diverse soil body side pressure calculation of force and verification repeatedly, simplified work progress, improve speed of application, avoid the displacement that causes due to the soil pressure imbalance, cave-in accident, and, the construction sequence of two foundation ditches no longer requires the coordinating and unifying, as long as completed each cement mixing pile construction of the middle soil body, two foundation ditches are free to complete construction speed and construction requirement according to each unit in charge of construction and go to carry out, two synchronized constraints of foundation pit construction have thoroughly been broken away from, easy construction, and the soil body in the middle of need not to dig up as second method, backfill again again after construction finishes, reduction of expenditure, time saving and energy saving.
As improvement, be provided with two placing of reinforcement concrete columns in the middle soil body, every row's concrete column top is provided with a steel concrete main beam, be provided with at a certain distance the secondary crossbeam of steel concrete between two steel concrete main beams one, the secondary crossbeam of two steel concrete main beams and Duo Gen steel concrete has consisted of reinforced concrete frame, and the reinforced concrete frame upper has concrete trestle plate.
Implementing this improved construction sequence is: after the first cement mixing pile and the second cement mixing pile driving construction are complete, 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 the steel concrete main beam, then at the reinforced concrete frame upper concrete trestle plate that is consisted of by steel concrete main beam and the secondary crossbeam of steel concrete.
Above architecture advances and the improvement of job practices have strengthened intensity and the bearing capacity of the middle soil body, and steel concrete trestle plate can be used as the temporary construction land used, is used for stacking material, driving or provides unearthed platform for excavating foundation ditch, therefore convenient and practical.
Description of drawings
Fig. 1 is the plan structure schematic diagram of the supporting and protection structure of two adjacent foundation ditches of the present invention.
Fig. 2 is the side-looking structural representation of the supporting and protection structure of two adjacent foundation ditches of the present invention.
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.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
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.Two close sides of the middle soil body 1 and two foundation ditches be provided with respectively that the first continuous cement mixing pile 2, two of a row ranked first between cement mixing pile 2 at a certain distance as 5 meters be provided with one and arrange the second continuous cement mixing pile 3.In other words, two ranked first and are provided with the second continuous cement mixing piles 3 of many rows between cement mixing pile 2, and continuous the second cement mixing pile 3 of every row is all vertical with the first cement mixing pile 2 of every row and often ranked second ranked first cement mixing pile 2 and push against with two respectively of two the second cement mixing piles 3 in two ends of cement mixing pile 3.In each foundation ditch except with the immediate side of the middle soil body 1 other side be equipped with the fender post 4 of steel concrete.In other words, in each foundation ditch except being provided with the fender post 4 of steel concrete with other side that ranked first that side of the parallel and contact of cement mixing pile 2, in particular, be exactly the outermost side of each foundation ditch also have two symmetries side totally three sides be equipped with fender post 4.The stake of each fender post 4 is pushed up and is provided with capping beam 5.Be provided with inner support 6 between three capping beams 5.Be provided with one deck every certain altitude on fender post 4 and enclose purlin 7, three roads of same layer enclose and are provided with inner support 6 between purlin 7.Be provided with two placing of reinforcement concrete columns 8 in the middle soil body 1, every placing of reinforcement concrete column 8 tops are provided with a steel concrete main beam 9, be provided with secondary 10, the two steel concrete main beams 9 of crossbeam of one steel concrete and the secondary crossbeam 10 of Duo Gen steel concrete has consisted of reinforced concrete frame at a certain distance as every 8 meters between two steel concrete main beams 9.The reinforced concrete frame upper has concrete trestle plate 11.
The job practices 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 other side sink to the fender post 4 of steel concrete, and annotate capping beam 5 in the stake top casting of each fender post 4, and cast inner support 6 between each capping beam 5, and at the both sides of the middle soil body 1 cast two the first continuous cement mixing piles 2 of row, and ranked first two and pour into a mould at a certain distance second a continuous cement mixing pile 3 of row between cement mixing pile 2.After the first cement mixing pile 2 and the second cement mixing pile 3 constructions are complete, at the interior construction reinforced bar concrete column 8 of the middle soil body 1, at reinforced concrete upright column 8 top casting reinforced concrete main beams 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 that is consisted of by steel concrete main beam 9 and the secondary crossbeam 10 of steel concrete.After concrete trestle plate 11 casting completes, can be according to construction sequence excavation pit same as the prior art, and enclose purlin 7 every certain altitude cast one deck, every layer is enclosed purlin 7 is three roads, lay respectively on two sides of the outermost side of each foundation ditch and symmetry, then in the cast inner support 6 between purlin 7 of enclosing with layer; After construction is arrived bottom foundation ditch, then the basement bottom board of constructing, outer wall of basement etc. poured into a mould from the bottom up.
Claims (4)
1. the supporting and protection structure of two adjacent foundation ditches, it comprises the middle soil body (1) between two adjacent foundation ditches and two foundation ditches, it is characterized in that: two close sides of the middle soil body (1) and two foundation ditches respectively are provided with continuous the first cement mixing pile (2) of a row, and two ranked first and are provided with at a certain distance continuous second cement mixing pile (3) of row between cement mixing pile (2); In each foundation ditch except with the immediate side of the middle soil body (1) other side be provided with the fender post (4) of steel concrete, the stake of each fender post (4) is pushed up and is provided with capping beam (5), be provided with inner support (6) between each capping beam (5), upward be provided with one deck every certain altitude encloses purlin (7) to fender post (4), and enclosing of same layer is provided with inner support (6) between purlin (7).
2. the supporting and protection structure of adjacent two foundation ditches according to claim 1, it is characterized in that: be provided with two placing of reinforcement concrete columns (8) in the middle soil body (1), every placing of reinforcement concrete column (8) top is provided with a steel concrete main beam (9), be provided with at a certain distance the secondary crossbeam (10) of steel concrete between two steel concrete main beams (9) one, two steel concrete main beams (9) and the many secondary crossbeams of steel concrete (10) have consisted of reinforced concrete frame, the reinforced concrete frame upper has concrete trestle plate (11).
3. the job practices of the supporting and protection structure of two adjacent foundation ditches, it is characterized in that: its construction sequence comprises: in each foundation ditch except with the immediate side of the middle soil body (1) other side sink to the fender post (4) of steel concrete, and annotate capping beam (5) in the stake top casting of each fender post (4), and pour into a mould inner support (6) between each capping beam (5), and at the both sides of the middle soil body (1) cast two continuous the first cement mixing piles (2) of row, and ranked first two and pour into a mould at a certain distance continuous second cement mixing pile (3) of row between cement mixing pile (2).
4. the job practices of the supporting and protection structure of adjacent two 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) construction are complete, 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), again at the reinforced concrete frame upper concrete trestle plate (11) that is consisted of by steel concrete main beam (9) and the secondary crossbeam of steel concrete (10).
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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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| CN103114594A true CN103114594A (en) | 2013-05-22 |
| CN103114594B CN103114594B (en) | 2014-12-17 |
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| CN110158600A (en) * | 2019-06-05 | 2019-08-23 | 浙江交工集团股份有限公司 | A kind of Adjacent Pit synchronizes the construction method of the asynchronous backfill of excavation |
| CN115387344A (en) * | 2022-08-19 | 2022-11-25 | 中建三局第三建设工程有限责任公司 | Double-foundation-pit double-working-condition rapid construction method |
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| CN115387344A (en) * | 2022-08-19 | 2022-11-25 | 中建三局第三建设工程有限责任公司 | Double-foundation-pit double-working-condition rapid construction method |
| CN115387344B (en) * | 2022-08-19 | 2023-09-12 | 中建三局第三建设工程有限责任公司 | Double-foundation pit double-working-condition rapid construction method |
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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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