CN103882869A - Inclined supporting pile structure for foundation pit support and construction method thereof - Google Patents
Inclined supporting pile structure for foundation pit support and construction method thereof Download PDFInfo
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- CN103882869A CN103882869A CN201410107071.1A CN201410107071A CN103882869A CN 103882869 A CN103882869 A CN 103882869A CN 201410107071 A CN201410107071 A CN 201410107071A CN 103882869 A CN103882869 A CN 103882869A
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Abstract
The invention relates to the field of foundation pit supports, in particular to an inclined supporting pile structure for a foundation pit support and a construction method of the structure. The inclined supporting pile structure for the foundation pit support comprises a fender post, a top beam, a foundation pit base plate, a building structure, an inclined supporting pile, a waterstop device and a soil improved structure, wherein the inclined supporting pile is implanted in primary soil below the foundation pit base plate in an inclined mode by a certain angle, the top end of the inclined supporting pile is fixedly connected with the top end of the fender post, and is embedded inside the top beam, and the whole structure is formed through the inclined supporting column and the top beam. The soil improved structure is fixed to the bottom end of the inclined supporting pile and the periphery of the bottom end of the inclined supporting pile, and the inclined supporting pile, the building structure and the foundation pit base plate penetrate through the waterstop device on the inclined supporting pile. According to the inclined supporting pile structure, the structural design and the construction method are reasonable, the construction period is greatly shortened, the construction cost are greatly reduced, barrier-free earth cutting and structural construction can be achieved, the structure is environmentally friendly and safe, and the potential safety hazards, generated by dismounting the support, of the suspended wall of the foundation pit support are thoroughly avoided.
Description
Technical field
The present invention relates to bracing of foundation pit field, relate in particular to a kind of oblique supporting pile structure and construction method thereof for bracing of foundation pit.
Background technology
Foundation ditch must cause the distortion of surrounding soil in digging process, to around building and underground utilities exert an influence.Serious will jeopardize its normal use or safety, can increase support system stablize foundation ditch safety for fear of this situation in dark base design and hole construction, mainly contain at present three kinds of forms: support, diagonal brace and reverse anchoring.
Support and be widely used at present deep foundation ditch, taken space in a large amount of holes but support, long construction period, is unfavorable for digging, and when the later stage removes, potential safety hazard is large, has not only improved the cost of engineering but also be unfavorable for environmental protection.
Oppositely anchoring is the new technology of in recent years promoting, oppositely to be that foundation ditch is uncovered open for the advantage of anchoring, cut the earth and the little poor stability of the convenient but easy generation group's anchor effect safety factor of structure construction, the loaded down with trivial details cycle of construction technology is long, can not make full use of land resources because anchoring body exceeds land red-line.
Diagonal brace is used for the center rotary island formula construction of super-giant foundation pit, first excavate at foundation ditch center with respect to supporting to have more economic advantages but need in construction, after completing, construction of bottom plates just can carry out diagonal brace construction, and must reserve constuction joint in the time of building structure construction, the loaded down with trivial details long construction period of program, the later stage removes and structure difficult treatment.
The patent No. " 03267938.6 " discloses the diagonal brace that a kind of building foundation pit supporting is used, it comprises cant beam and cushion cap, it is characterized in that cushion cap is placed in the foundation ditch subsoil body of planning to build below basement bottom board, lower end and the cushion cap of cant beam are connected as a single entity, and upper end is connected with soil retaining block or is connected with the Guan Liang on soil retaining block top.This utility model adopts this kind of diagonal brace mode, have and cut the earth easily with respect to the mode of supporting, can the disposable shoveling of large area, reduction of erection time, but excavate out cushion cap work plane in advance before cant beam construction time, need reserve the earthwork as the further construction of passive area stabilization, the reserved earthwork needs secondary excavation very inconvenient, and the dismounting work of diagonal brace is also pretty troublesome, if do not removed, can not solve the problem of building structure sealing.
Along with area and the degree of depth of excavation of foundation pit are increasing, traditional support system has been difficult to meet the effect of safety economy, and the engineering quantity of traditional support form is large, and cost is high, and in support section excavation difficulty, the potential safety hazard existing in work progress is more, and the duration is longer.
Summary of the invention
Technical problem to be solved by this invention is to overcome existing above-mentioned deficiency in prior art, and provide a kind of oblique supporting pile structure and construction method thereof for bracing of foundation pit, solve the technical problem that conventional pattern foundation pit supporting structure technique cost is high and construction is inconvenient, ensured safety and the economy of foundation pit construction.
The present invention addresses the above problem adopted technical scheme: a kind of oblique supporting pile structure for bracing of foundation pit, comprise fender post, Guan Liang, base plate of foundation pit and building structure, also comprise oblique supporting pile, antipriming and reclamation structure, oblique supporting pile is at an angle in the oblique initial soil being implanted in below base plate of foundation pit; Oblique supporting pile top is fixedly connected with fender post top, is embedded in hat beam inside, forms overall structure with Guan Liang; Described oblique supporting pile bottom and bottom are fixed with reclamation structure around, and described reclamation structure is the hard solid structure that soil forms after overcuring is processed; Oblique supporting pile and building structure through part are provided with antipriming on oblique supporting pile, and described oblique supporting pile and base plate of foundation pit through part are also provided with antipriming on oblique supporting pile.
Antipriming, for the construction between oblique supporting pile and base plate of foundation pit through part and the construction between oblique supporting pile and building structure through part, after the construction later stage, oblique supporting pile cutting removed, prevents the seepy question of structure break joint; In Excavation Process, fender post is subject to the pressure of outside soil or works, and active force is sent to reclamation structure by oblique supporting pile, through overcuring reclamation structure after treatment, can effectively strengthen the supporting capacity of soil, the supporting role that improves oblique supporting pile.
As preferably, described oblique supporting pile is H formed steel construction, steel lattice column structure or steel tubular structure.
As preferably, described fender post uses Larsen steel sheet pile, reinforced concrete castinplace pile, the stake of SMW engineering method or steel pipe pile.
As preferably, the angle of the oblique insertion soil of described oblique supporting pile is less than 45 degree.
As preferably, described oblique supporting pile top is welded to connect or is connected by reinforcing bar binding by placing embedded iron parts with fender post top.
As preferably, described antipriming adopts sealing piece, and described sealing piece is connected with oblique supporting pile employing welding manner.
As preferably, reclamation structure is the hard solid structure forming after adopting high-pressure injection cement paste or soil-solidified-agent to process soil solidification.
For a construction method for the oblique supporting pile structure of bracing of foundation pit, the step of this construction method is as follows:
(1) foundation ditch fender post construction around;
(2) implantation of oblique supporting pile: along fender post edge by oblique supporting pile at an angle in the initial soil below oblique implantation base plate of foundation pit;
(3) the curing processing of initial soil: high-pressure injection pipe is stretched into oblique supporting pile bottom, repeat, to its bottom high-pressure injection cement paste or soil-solidified-agent, to form reclamation structure.
(4) process on oblique supporting pile top: oblique supporting pile top is fixedly connected with fender post top;
(5) pouring construction of Guan Liang: oblique supporting pile top and fender post top are wrapped in to inside concrete, form Guan Liang after hardening of concrete, the oblique supporting pile top of Guan Liang and its inside and fender post top form overall structure;
(6) excavation construction of foundation ditch;
(7) first build base plate of foundation pit, then construction building structure, in work progress: when the construction of base plate of foundation pit and oblique supporting pile through part, need on oblique supporting pile, antipriming be set, when the construction of building structure and oblique supporting pile through part, antipriming is also set on oblique supporting pile;
(8) subsequent treatment of oblique supporting pile: the construction in base plate of foundation pit and building structure completes, maintenance reaching after concrete strength, along building structure, oblique supporting pile upper/lower terminal cutting is removed, top surface edge along base plate of foundation pit removes oblique supporting pile cutting, and Guan Liang and the cutting of oblique supporting pile junction remove.
As preferably, in (2) step, high-pressure injection pipe is stretched into oblique supporting pile inside and be slightly longer than oblique supporting pile, first spray slurries and stir to facilitate the implantation of oblique supporting pile in advance.
As preferably, in (4) step, oblique supporting pile top and fender post top are by being welded and fixed or reinforcing bar binding mode is connected and fixed.
Step 2 was constructed before excavation of foundation pit, overcome the technical problem that first excavation supports again of the prior art, step 3 adopts the method for high-pressure injection cement paste or soil-solidified-agent by soil hardening, reach the supporting role effect of oblique supporting pile bottom, the mode that step 4 adopts oblique supporting pile top to be connected by welding or reinforcing bar binding with fender post top Guan Liang, by the hat beam concrete pouring construction in step 5, oblique supporting pile top, fender post top and Guan Liang are formed as entirety, stressed effect is that the reaction force acts of fender post is in oblique supporting pile, oblique supporting pile acts on reclamation structure.
The present invention is after oblique supporting pile has been constructed, excavation of foundation pit can disposablely complete, when base plate of foundation pit construction and building structure construction, directly with oblique supporting pile crossover sites integrated construction, utilize the construction technology of antipriming, solve the seepy question occurring after crossover sites construction, after all having constructed, by all the other the exposed portions serve excisions of oblique supporting pile.
The present invention compared with prior art, has the following advantages and beneficial effect: the construction period of 1, greatly having saved traditional support; 2, can realize accessible shoveling and structure construction; 3, do not need the construction materials such as a large amount of steel concrete, the later stage clears up without explosion, either environmental protection but also safety or reduced construction cost; 4, the sealing piece technology adopting is without the problem of considering constuction joint, and it is very convenient that later stage structure is processed; 5, thoroughly solve the stress release problem producing because of supporting removal; 6, thoroughly solve the potential safety hazard of the bracing of foundation pit suspended wall producing because of supporting removal.
Brief description of the drawings
Fig. 1 is product structure schematic diagram of the present invention;
Brief description of the drawings: 1, fender post; 2, Guan Liang; 3, oblique supporting pile; 4, reclamation structure; 5, antipriming; 6, base plate of foundation pit; 7, building structure.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in more detail.
Embodiment:
For an oblique supporting pile structure for bracing of foundation pit, its structure comprises fender post 1, hat beam 2, oblique supporting pile 3, reclamation structure 4, antipriming 5, base plate of foundation pit 6 and building structure 7.
Oblique supporting pile 3 is oblique being implanted in the initial soil of base plate of foundation pit below 6 at an angle; Oblique supporting pile 3 tops are fixedly connected with fender post 1 top, are embedded in hat beam 2 inside, form overall structure with hat beam 2.
Oblique supporting pile 3 bottoms and bottom are provided with reclamation structure 4 around, and this reclamation structure 4 is for adopting the hard soil texture forming after high-pressure injection cement paste or soil-solidified-agent.
Oblique supporting pile 3 is provided with antipriming 5 with building structure 7 through parts, oblique supporting pile 3 is also provided with antipriming 5 with base plate of foundation pit 6 through parts, and in the present embodiment, antipriming 5 adopts sealing piece, be fixedly welded on oblique supporting pile 3, built in inside concrete.
Be used for the construction method of a kind of oblique supporting pile structure for bracing of foundation pit of the present embodiment:
Oblique supporting pile 3 is oblique being implanted in initial soil at an angle, in the present embodiment, oblique supporting pile 3 adopts H formed steel construction, high-pressure injection pipe is extended to bottom from oblique supporting pile 3 inside, repeat to its bottom and bottom periphery high-pressure injection cement paste or soil-solidified-agent, form reclamation structure 4, be implanted in soil course at oblique supporting pile 3, high-pressure injection pipe can be stretched into oblique supporting pile 3 inside and slightly be longer than oblique supporting pile 3, first spray slurries and stir to facilitate the implantation of oblique supporting pile 3 in advance.Oblique supporting pile 3 tops and fender post 1 top are welded and fixed, and formwork concreting form hat beam 2 after hardening of concrete.Now, fender post 1, hat beam 2, oblique supporting pile 3 and reclamation structure 4 are formed as having the overall structure of interaction force.
Reach after predetermined strength wait the concrete of being preced with beam 2 and reclamation structure 4, implement excavation of foundation pit work, due to the operation before having adopted, foundation ditch can disposablely all be excavated to design elevation place.
When base plate of foundation pit 6 is constructed, run through the centre position at base plate of foundation pit 6 places at oblique supporting pile 3, antipriming 5 is set, this antipriming adopts sealing piece, be directly welded on oblique supporting pile 3, in the time of base plate of foundation pit 6 concreting, directly oblique supporting pile 3 built in the inside of base plate of foundation pit 6 with base plate of foundation pit 6 crossover sites.In the time that building structure 7 is constructed, with the position of running through of oblique supporting pile 3, antipriming 5 is being set equally, building structure herein 7 is shear wall in the present embodiment, when construction, oblique supporting pile 3 is built in building structure 6 inside with building structure 6 crossover sites, the concrete structure maintenance of building also reaches design strength.
Edge along building structure 7 removes the upper/lower terminal cutting of oblique supporting pile 3, along the top surface edge of base plate of foundation pit 6, oblique supporting pile 3 cuttings is removed, and hat beam 2 removes with oblique supporting pile 3 junction cuttings.
Although the present invention with embodiment openly as above; but it is not in order to limit protection scope of the present invention; any technician who is familiar with this technology, not departing from change and the retouching done in the spirit and scope of the present invention, all should belong to protection scope of the present invention.
Claims (10)
1. for an oblique supporting pile structure for bracing of foundation pit, comprise fender post, Guan Liang, base plate of foundation pit and building structure, it is characterized in that: also comprise oblique supporting pile, antipriming and reclamation structure,
Described oblique supporting pile is at an angle in the oblique initial soil being implanted in below base plate of foundation pit;
Described oblique supporting pile top is fixedly connected with fender post top, is embedded in hat beam inside, forms overall structure with Guan Liang;
Described oblique supporting pile bottom and bottom are fixed with reclamation structure around, and described reclamation structure is the hard solid structure that soil forms after overcuring is processed;
Described oblique supporting pile and building structure through part are provided with antipriming on oblique supporting pile, and described oblique supporting pile and base plate of foundation pit through part are also provided with antipriming on oblique supporting pile.
2. the oblique supporting pile structure for bracing of foundation pit according to claim 1, is characterized in that: described oblique supporting pile is H formed steel construction, steel lattice column structure or steel tubular structure.
3. the oblique supporting pile structure for bracing of foundation pit according to claim 1, is characterized in that: described fender post uses Larsen steel sheet pile, reinforced concrete castinplace pile, the stake of SMW engineering method or steel pipe pile.
4. the oblique supporting pile structure for bracing of foundation pit according to claim 1, is characterized in that: the angle of the oblique insertion soil of described oblique supporting pile is less than 45 degree.
5. according to the oblique supporting pile structure for bracing of foundation pit described in claim 1,2 or 3, it is characterized in that: described oblique supporting pile top is welded to connect or is connected by reinforcing bar binding by placing embedded iron parts with fender post top.
6. the oblique supporting pile structure for bracing of foundation pit according to claim 1 and 2, is characterized in that: described antipriming adopts sealing piece, and described sealing piece adopts welding manner to be connected with oblique supporting pile.
7. the oblique supporting pile structure for bracing of foundation pit according to claim 1, is characterized in that: described reclamation structure is the hard solid structure forming after adopting high-pressure injection cement paste or soil-solidified-agent to process soil solidification.
8. according to the construction method of a kind of oblique supporting pile structure for bracing of foundation pit described in right 1, it is characterized in that: the step of this construction method is as follows:
(1) foundation ditch fender post construction around;
(2) implantation of oblique supporting pile: along fender post edge by oblique supporting pile at an angle in the initial soil below oblique implantation base plate of foundation pit;
(3) the curing processing of initial soil: high-pressure injection pipe is stretched into oblique supporting pile bottom, repeat, to its bottom high-pressure injection cement paste or soil-solidified-agent, to form reclamation structure;
(4) process on oblique supporting pile top: oblique supporting pile top is fixedly connected with fender post top;
(5) pouring construction of Guan Liang: oblique supporting pile top and fender post top are wrapped in to inside concrete, form Guan Liang after hardening of concrete, the oblique supporting pile top of Guan Liang and its inside and fender post top form overall structure;
(6) excavation construction of foundation ditch;
(7) first build base plate of foundation pit, then construction building structure, in work progress: when the construction of base plate of foundation pit and oblique supporting pile through part, need on oblique supporting pile, antipriming be set, when the construction of building structure and oblique supporting pile through part, antipriming is also set on oblique supporting pile;
(8) subsequent treatment of oblique supporting pile: the construction in base plate of foundation pit and building structure completes, maintenance reaching after concrete strength, along building structure, oblique supporting pile upper/lower terminal cutting is removed, top surface edge along base plate of foundation pit removes oblique supporting pile cutting, and Guan Liang and the cutting of oblique supporting pile junction remove.
9. the construction method of the oblique supporting pile structure for bracing of foundation pit according to claim 7, it is characterized in that: in (2) step, high-pressure injection pipe is stretched into oblique supporting pile inside and be slightly longer than oblique supporting pile, first spray slurries and stir to facilitate the implantation of oblique supporting pile in advance.
10. the construction method of the oblique supporting pile structure for bracing of foundation pit according to claim 7, is characterized in that: in (4) step, oblique supporting pile top and fender post top are by being welded and fixed or reinforcing bar binding mode is connected and fixed.
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Cited By (11)
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| CN105464155A (en) * | 2014-09-06 | 2016-04-06 | 任丘市永基建筑安装工程有限公司 | Reutilization technique for prefabricated housing foundation beams |
| CN106638622A (en) * | 2017-02-20 | 2017-05-10 | 中车建设工程有限公司 | Foundation pit temporary supporting structure and foundation pit construction method for preventing adjacent building foundation from deforming |
| CN107882039A (en) * | 2016-09-30 | 2018-04-06 | 上海城地建设股份有限公司 | H type component building enclosures and its construction method are supportted before a kind of steel pipe |
| CN108035361A (en) * | 2017-12-28 | 2018-05-15 | 上海智平基础工程有限公司 | A kind of advanced support supporting construction and its construction method |
| CN108867656A (en) * | 2018-07-12 | 2018-11-23 | 中国建筑第八工程局有限公司 | Foundation pit system and its construction method |
| CN108951646A (en) * | 2018-07-18 | 2018-12-07 | 江苏东合南岩土科技股份有限公司 | Pit Bracing in Soft Soil structure and construction method |
| CN110130399A (en) * | 2019-05-15 | 2019-08-16 | 天津大学 | Tilt trapezoidal piping lane system and its construction method of the supporting in conjunction with main structure |
| CN112267472A (en) * | 2020-10-17 | 2021-01-26 | 江苏建院营造股份有限公司 | Construction process for foundation pit support of inclined pile of advanced mixing pile |
| CN113914323A (en) * | 2021-09-28 | 2022-01-11 | 中亿丰建设集团股份有限公司 | Steel pipe grouting type tree root pile construction method for advanced support |
| CN114197485A (en) * | 2021-12-23 | 2022-03-18 | 上海勇创环境岩土工程有限公司 | Construction process of inclined support pile for soft soil base enclosure |
| CN115125963A (en) * | 2022-06-24 | 2022-09-30 | 中建八局南方建设有限公司 | Enclosure structure for soft soil foundation and construction method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105464155A (en) * | 2014-09-06 | 2016-04-06 | 任丘市永基建筑安装工程有限公司 | Reutilization technique for prefabricated housing foundation beams |
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| CN110130399A (en) * | 2019-05-15 | 2019-08-16 | 天津大学 | Tilt trapezoidal piping lane system and its construction method of the supporting in conjunction with main structure |
| CN112267472A (en) * | 2020-10-17 | 2021-01-26 | 江苏建院营造股份有限公司 | Construction process for foundation pit support of inclined pile of advanced mixing pile |
| CN113914323A (en) * | 2021-09-28 | 2022-01-11 | 中亿丰建设集团股份有限公司 | Steel pipe grouting type tree root pile construction method for advanced support |
| CN114197485A (en) * | 2021-12-23 | 2022-03-18 | 上海勇创环境岩土工程有限公司 | Construction process of inclined support pile for soft soil base enclosure |
| CN115125963A (en) * | 2022-06-24 | 2022-09-30 | 中建八局南方建设有限公司 | Enclosure structure for soft soil foundation and construction method thereof |
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