CN102704489A - Foundation pit support structure and construction method thereof - Google Patents
Foundation pit support structure and construction method thereof Download PDFInfo
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- CN102704489A CN102704489A CN2012101314882A CN201210131488A CN102704489A CN 102704489 A CN102704489 A CN 102704489A CN 2012101314882 A CN2012101314882 A CN 2012101314882A CN 201210131488 A CN201210131488 A CN 201210131488A CN 102704489 A CN102704489 A CN 102704489A
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- foundation pit
- sloping
- pit supporting
- earthen platform
- lattice wall
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Abstract
The invention discloses a foundation pit support structure and a construction method thereof, wherein the foundation pit support structure comprises a lattice wall, a slope cutting stereobate, an inner support beam, a main body structure, and a foundation slab arranged on the bottom part of a foundation pit; the lattice wall and the slop cutting stereobate are orderly attached to the inner wall of the foundation pit; the inner support beam is arranged above the slope cutting stereobate; one end of the inner support beam is connected with the side of the lattice wall, and the other end of the inner support beam is connected with the main body structure. An earth cutting mode of a'center island' method is combined with the lattice wall to ensure water stopping and displacement control of the foundation pit when the foundation pit support structure is constructed, so the reliability of the foundation pit support structure is improved, the construction is simple, the work period is short and the economical efficiency is strong.
Description
Technical field
The present invention relates to the building foundation field, particularly relate to a kind of foundation pit supporting construction and construction method thereof.
Background technology
The river of China, sea distribute extensively, and the phase has deposited more weak soil and layer of sand stratum in the time immemorial, and existing these regional economy are basically all very flourishing, and engineering activity is constantly to underground expansion, and particularly big and dark foundation ditch is more and more.The large-scale foundation ditch key for design factor on weak soil and layer of sand stratum is the selection of going along with sb. to guard him mode and excavation method, and therefore selecting a kind of economical rationality, safe and reliable pattern foundation pit supporting structure mode is the key point of control foundation ditch monolithic stability and foundation pit deformation.
Existing foundation pit supporting construction has campshed formula supporting and protection structure, cement mixing pile gravity supporting and protection structure, steel sheet pile supporting and protection structure, diaphragm wall supporting and protection structure, gantry type piling structure, light water earth barricade supporting and protection structure, draws anchor formula supporting and protection structure, cantilevered supporting and protection structure etc.
In weak soil and the processing of layer of sand stratum, the major defect of existing foundation pit supporting construction shows:
Ordinary Portland cement agitation pile supporting and protection structure is applicable to the foundation ditch less than 6 meters, and bending resistance is relatively poor, and the control displacement is indifferent; SMW worker's method stake supporting and protection structure shaped steel and cement-soil can not co-operation, and operating expenses is big.
Steel sheet pile supporting and protection structure bending resistance a little less than, support rigidity is little, excavation back distortion is bigger, can not keep off the fine particle in the water and soil.
Diaphragm wall supporting and protection structure cost is higher, the construction requirement special equipment.
Draw anchor formula support construction difficulty big, operating expenses is big, and the bearing capacity discreteness is big.
Cantilevered supporting and protection structure is very sensitive to cutting depth, is easy to generate strange bigger distortion, and surrounding environment is had a negative impact.
The interior supporting and protection structure that supports influences main structure construction, influences duration, cost, and operating expenses is big, and the distortion of construction back greatly.
Summary of the invention
The purpose of this invention is to provide a kind of foundation pit supporting construction and construction method thereof, it can overcome the shortcoming of prior art, and it has not only improved the reliability of foundation pit supporting construction, and construction is simple, and the duration is short, and economy is strong.
The objective of the invention is to realize like this:
A kind of foundation pit supporting construction, it includes the lattice wall, puts sloping earthen platform; Interior brace summer; Agent structure and be arranged at the sole plate of foundation ditch bottom, said lattice wall and saidly put sloping earthen platform and be close to the setting of foundation ditch inwall successively, said top of putting sloping earthen platform is provided with interior brace summer; An end of brace summer is connected with the side of said lattice wall in said, and the other end of said interior brace summer is connected with said agent structure.
Among embodiment, said putting is inserted with many bamboo reinforcements in the sloping earthen platform therein, and at domatic injection concrete.
Among embodiment, said lattice wall includes the cement mixing piles of the two-way interlock of many rows, and in each cement mixing pile, is provided with steel pipe with ribbing therein.
Among embodiment, be longer than other a few draining mud agitation pile length therein near the length of the inboard draining mud agitation pile lower end of said foundation ditch.
Among embodiment, said lattice wall includes the cement mixing pile of the two-way interlock of three rows therein, and wherein two draining mud agitation piles are one group and lean on that said foundation ditch is inboard to be provided with, and are connected with another draining mud agitation pile through cement mixing pile.
Among embodiment, said steel pipe with ribbing is the segmented belt fin steel tube therein, and connects through screw shell in segmentation place.
Among embodiment, said steel pipe with ribbing is provided with a plurality of injected holes therein.
Among embodiment, it also includes sealing, ends native curtain therein, said sealing, ends native curtain and is arranged at said putting between sloping earthen platform and the said sole plate.
A kind of construction method like above each described foundation pit supporting construction, it includes:
(1) in foundation ditch, be provided with sealing, end native curtain;
(2) the lattice wall is set and puts sloping earthen platform at the foundation ditch inwall, and plug bamboo reinforcement, at the said domatic injection concrete of putting sloping earthen platform said putting in the sloping earthen platform;
(3) excavate the said soil body of putting the inboard said foundation ditch core in sloping earthen platform;
(4) construction is along making said sole plate, reaching the contrary interior brace summer of doing along doing said agent structure;
(5) secondary is cut the earth, and excavates the said soil body of putting sloping earthen platform, and accomplishes the residue agent structure.
Therein among embodiment, in step (2), when the steel pipe with ribbing of said lattice wall was set, said steel pipe segmented with ribbing was pressed in the said cement mixing pile, and adjacent two sections steel pipes with ribbing connect through screw shell.
The present invention compared with prior art has following beneficial effect:
(1) adopt the shoveling mode of " central island " formula to combine with steel pipe lattice wall with ribbing; Characteristics have separately been given full play to; Support said lattice wall (promptly supporting the foundation ditch inwall) through interior brace summer and agent structure; Can guarantee the sealing and the displacement control of foundation ditch, and significantly shorten the construction period, make the foundation ditch projected depth of cement-soil lattice wall can extend to 15m.
(2) lattice is inserted steel pipe with ribbing within the walls and has been solved lattice wall tensile strength problem of lower; Steel pipe with ribbing has increased the snap-in force between steel pipe and the cement-soil; Improve the anti-bending bearing capacity of lattice wall, and solved cooperative problem between steel pipe with ribbing and the lattice wall.
(3) putting sloping earthen platform in the foundation ditch is in putting the sloping soil body, to insert bamboo reinforcement to form bamboo reinforcement formula earth structure, domatic injection concrete, its internal stability and the stable problem of external overall during with solution foundation pit supporting construction first operating mode.
(4) the foundation ditch inner peripheral adopts the agent structure that method of center island accomplishes, the interior brace summer interior brace summer as pattern foundation pit supporting structure, after pattern foundation pit supporting structure is accomplished, need not remove agent structure and in brace summer, not only reduced construction costs but also shortened the construction period.
Description of drawings
Fig. 1 is the structural representation of foundation pit supporting construction of the present invention;
Fig. 2 is the structural representation of lattice wall of the present invention;
Fig. 3 is the structural representation of the present invention's steel pipe with ribbing.
The specific embodiment
As shown in Figure 1, foundation pit supporting construction of the present invention, it includes at said foundation ditch inwall and is provided with cement-soil lattice wall 11 successively and puts sloping earthen platform 12; Sealing, end native curtain 10; Brace summer 13 in the stacked plate type, agent structure 14 and be arranged at the sole plate 15 of foundation ditch bottom, said lattice wall 11 and saidly put sloping earthen platform 12 and be close to the setting of foundation ditch inwall successively; Said sealing, end native curtain 10 and be arranged at said putting between sloping earthen platform 12 and the said sole plate 15; Said top of putting sloping earthen platform 12 is provided with interior brace summer 13, and an end of said interior brace summer 13 is connected with the side 11 of said lattice wall, and the other end of said interior brace summer 13 is connected with said agent structure 14.The supporting role of the inwall through brace summer 13 in said and 11 pairs of foundation ditches of said lattice wall guarantee the displacement control of foundation ditch, and brace summer 13 need not removed in said, can be directly as the part of agent structure, the saving duration.
Said putting in the sloping earthen platform 12 is inserted with many bamboo reinforcements 16, and at domatic injection concrete 17, its internal stability and the stable problem of external overall during with solution foundation pit supporting construction first operating mode.In addition, present embodiment preferably also is inserted with many bamboo reinforcements 19 in natural discharging slope 18, and at domatic injection concrete 20.
Said lattice wall 11 includes the cement mixing piles 21 of the two-way interlock of many rows, and in each cement mixing pile 21, is pressed into through the hydraulic test segmented and is provided with steel pipe 22 with ribbing; Be longer than other a few draining mud agitation pile 21 length, like this, make a draining mud agitation pile 21 of innermost side can doublely do water-stop curtain near the length of an inboard draining mud agitation pile 21 lower ends of said foundation ditch.As shown in Figure 3, said steel pipe 22 with ribbing is the segmented belt fin steel tube, and connects through screw shell 23 in segmentation place.Be equipped with triangular fin 222 on the steel pipe with ribbing 221 of each section segmentation, and be provided with injected hole 223, be convenient to secondary grouting at triangular fin 222 places.
As shown in Figure 2, in this preferred embodiment, said lattice wall 11 includes the cement mixing pile 21 of the two-way interlock of three rows, and wherein two draining mud agitation piles are one group and lean on that said foundation ditch is inboard to be provided with, and are connected with another draining mud agitation pile through cement mixing pile 24.In order to save cost, the cement mixing pile 24 that connects two groups of cement mixing piles 21 can not be provided with steel pipe 22 with ribbing.
A kind of construction method of foundation pit supporting construction as previously discussed, it includes:
(1) in foundation ditch, be provided with sealing, end native curtain 10;
(2) lattice wall 11 is set and puts sloping earthen platform 12 at the foundation ditch inwall, and plug bamboo reinforcement 16, at the said domatic injection concrete 17 of putting sloping earthen platform 12 said putting in the sloping earthen platform 12;
(3) excavate the said soil body of putting the said foundation ditch core of 12 inboards, sloping earthen platform;
(4) construction is along making said sole plate 15, doing brace summer 13 in the stacked plate type along doing said agent structure 14 and contrary;
(5) secondary is cut the earth, and excavates the said soil body of putting sloping earthen platform 12, and accomplishes the residue agent structure.
Wherein, in step (2), when the steel pipe 22 with ribbing of said lattice wall 11 was set, said steel pipe 22 with ribbing was to be pressed in the said cement mixing pile 21 through the hydraulic test segmentation at mixing pile machine, and adjacent two sections steel pipes 22 with ribbing connect through screw shell 23.
Wherein, secondary is cut the earth to excavating the said sloping earthen platform 12 of putting in step (5), promptly remains dotted portion as shown in Figure 1.Dig the mode of establishing and secondary the said first time that puts sloping earthen platform 12 and excavate mode and all belonged to prior art, present embodiment repeats no more at this.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (10)
1. a foundation pit supporting construction is characterized in that, it includes the lattice wall; Put sloping earthen platform, interior brace summer, agent structure and be arranged at the sole plate of foundation ditch bottom; Said lattice wall and saidly put sloping earthen platform and be close to the setting of foundation ditch inwall successively; Said top of putting sloping earthen platform is provided with interior brace summer, and an end of said interior brace summer is connected with the side of said lattice wall, and the other end of said interior brace summer is connected with said agent structure.
2. foundation pit supporting construction according to claim 1 is characterized in that, said putting is inserted with many bamboo reinforcements in the sloping earthen platform, and at domatic injection concrete.
3. foundation pit supporting construction according to claim 1 is characterized in that, said lattice wall includes the cement mixing pile of the two-way interlock of many rows, and in each cement mixing pile, is provided with steel pipe with ribbing.
4. foundation pit supporting construction according to claim 3 is characterized in that, is longer than other a few draining mud agitation pile length near the length of the inboard draining mud agitation pile lower end of said foundation ditch.
5. according to claim 3 or 4 described foundation pit supporting constructions; It is characterized in that; Said lattice wall includes the cement mixing pile of the two-way interlock of three rows, and wherein two draining mud agitation piles are one group and lean on that said foundation ditch is inboard to be provided with, and are connected with another draining mud agitation pile through cement mixing pile.
6. foundation pit supporting construction according to claim 3 is characterized in that, said steel pipe with ribbing is the segmented belt fin steel tube, and connects through screw shell in segmentation place.
7. foundation pit supporting construction according to claim 3 is characterized in that, said steel pipe with ribbing is provided with a plurality of injected holes.
8. foundation pit supporting construction according to claim 1 is characterized in that, it also includes sealing, ends native curtain, said sealing, ends native curtain and is arranged at said putting between sloping earthen platform and the said sole plate.
9. construction method like each described foundation pit supporting construction of claim 1 to 8 is characterized in that it includes:
(1) in foundation ditch, be provided with sealing, end native curtain;
(2) the lattice wall is set and puts sloping earthen platform at the foundation ditch inwall, and plug bamboo reinforcement, at the said domatic injection concrete of putting sloping earthen platform said putting in the sloping earthen platform;
(3) excavate the said soil body of putting the inboard said foundation ditch core in sloping earthen platform;
(4) construction is along making said sole plate, reaching the contrary interior brace summer of doing along doing said agent structure;
(5) secondary is cut the earth, and excavates the said soil body of putting sloping earthen platform, and accomplishes the residue agent structure.
10. the construction method of foundation pit supporting construction according to claim 9; It is characterized in that, in step (2), when the steel pipe with ribbing of said lattice wall is set; Said steel pipe segmented with ribbing is pressed in the said cement mixing pile, and adjacent two sections steel pipes with ribbing connect through screw shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210131488.2A CN102704489B (en) | 2012-05-02 | 2012-05-02 | Foundation pit support structure and construction method thereof |
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| CN201210131488.2A CN102704489B (en) | 2012-05-02 | 2012-05-02 | Foundation pit support structure and construction method thereof |
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| CN102704489A true CN102704489A (en) | 2012-10-03 |
| CN102704489B CN102704489B (en) | 2015-03-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106120804A (en) * | 2016-06-26 | 2016-11-16 | 中建三局集团有限公司 | A kind of two grades of support systems of super-giant foundation pit double-row pile and construction method thereof |
| CN111810712A (en) * | 2020-07-17 | 2020-10-23 | 中铁十二局集团有限公司 | Push pipe starting construction method for bent pipeline |
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| CN106120804A (en) * | 2016-06-26 | 2016-11-16 | 中建三局集团有限公司 | A kind of two grades of support systems of super-giant foundation pit double-row pile and construction method thereof |
| CN106120804B (en) * | 2016-06-26 | 2018-12-11 | 中建三局集团有限公司 | A kind of super-giant foundation pit double-row pile second level support system and its construction method |
| CN111810712A (en) * | 2020-07-17 | 2020-10-23 | 中铁十二局集团有限公司 | Push pipe starting construction method for bent pipeline |
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| Publication number | Publication date |
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| CN102704489B (en) | 2015-03-18 |
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Address after: 510000 Guangdong city of Guangzhou province Yuexiu District Shuiyin Road No. 56 building 3 room 9BC-2 Patentee after: Guangzhou Luban building science and technology group Limited by Share Ltd Address before: 510665 Guangzhou City, Tianhe District Province Industrial Park Road, building No. 398, room 60, No. Patentee before: Guangzhou Luban Construction Group Co., Ltd. |
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Denomination of invention: Foundation pit support structure and construction method thereof Effective date of registration: 20191223 Granted publication date: 20150318 Pledgee: Bank of China Limited Guangzhou Yuexiu Branch Pledgor: Guangzhou Luban building science and technology group Limited by Share Ltd Registration number: Y2019440000302 |