CN103758134B - A kind of construction method combining Double-row Piles Support system - Google Patents
A kind of construction method combining Double-row Piles Support system Download PDFInfo
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- CN103758134B CN103758134B CN201410033020.9A CN201410033020A CN103758134B CN 103758134 B CN103758134 B CN 103758134B CN 201410033020 A CN201410033020 A CN 201410033020A CN 103758134 B CN103758134 B CN 103758134B
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- 238000010276 construction Methods 0.000 title claims abstract description 69
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 109
- 239000010959 steel Substances 0.000 claims abstract description 109
- 239000004568 cements Substances 0.000 claims abstract description 104
- 230000002787 reinforcement Effects 0.000 claims abstract description 51
- 239000010410 layers Substances 0.000 claims abstract description 41
- 239000002689 soil Substances 0.000 claims abstract description 22
- 239000011901 water Substances 0.000 claims abstract description 16
- 210000003414 Extremities Anatomy 0.000 claims abstract description 13
- 239000004567 concrete Substances 0.000 claims abstract description 11
- 238000009412 basement excavation Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 9
- 239000000203 mixtures Substances 0.000 claims description 7
- 210000003205 Muscles Anatomy 0.000 claims description 4
- 238000006073 displacement reactions Methods 0.000 claims description 4
- 230000000875 corresponding Effects 0.000 claims description 3
- 239000003673 groundwater Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 239000011150 reinforced concrete Substances 0.000 description 9
- 238000007789 sealing Methods 0.000 description 5
- 230000003014 reinforcing Effects 0.000 description 3
- 238000010586 diagrams Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000000034 methods Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 208000008425 Protein Deficiency Diseases 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effects Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering processes Methods 0.000 description 1
- 239000000463 materials Substances 0.000 description 1
- 230000000414 obstructive Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000007787 solids Substances 0.000 description 1
Abstract
Description
Technical field
The present invention relates to a kind of building foundation pit supporting system and construction method thereof.
Background technology
The common double Row Piles Supporting Structure that cantilevered shaped steel Soil-cement piling wall (also claiming SMW engineering method) and front and rear row are reinforced concrete pile in base pit engineering, applied increasing support form in the last few years.
Described cantilevered shaped steel Soil-cement piling wall is used for weak soil, silt, under the non-rigid geological conditionss such as fine sand, a kind ofly in cement mixing method, insert H profile steel and the compound formed keeps off native waterproof structure, there is intercepting water property of height, economical, construction pollution is little, to features such as surrounding environment influence are little, and after basement construction completes, H profile steel in shaped steel Soil-cement piling wall can be extracted, then recovery and reuse are given, not only can economize on resources, it also avoid fender body forever to leave in underground after basement construction, become the obstruction of other underground engineering construction follow-up.The shortcoming of shaped steel Soil-cement piling wall is, because the main lateral resisting element of shaped steel Soil-cement piling wall is shaped steel, therefore rigidity is lower, lateral deformation stiffness is not enough, be unfavorable for controlling distortion, and for darker foundation ditch, shaped steel Soil-cement piling wall also needs and inner support or anchor pole (anchor cable) conbined usage, construction is inconvenient, and efficiency is low.
Described common double Row Piles Supporting Structure is made up of bear down on one Guan Liang and linking beam of front-seat reinforced concrete pile, rear placing of reinforcement concrete pile, front and back campshed, before and after this supporting and protection structure utilizes, campshed and linking beam form space door frame, have the advantages that lateral deformation stiffness is large, and without the need to arranging inner support or anchor cable in hole, so be very easy to construction, the construction period can be shortened.The shortcoming of common double Row Piles Supporting Structure is, for the base pit engineering needing to intercept water, because front and rear row separated steel rib concrete pile cannot form water-stop curtain, so need separately to establish water-stop curtain, because this increasing working procedure and construction costs.
Summary of the invention
The object of this invention is to provide a kind of construction method combining Double-row Piles Support system, solve and needing in the base pit engineering intercepted water, adopt common double Row Piles Supporting Structure construction costs too high, adopt cantilevered shaped steel Soil-cement piling wall can not meet again the problem of base pit engineering safety and Deformation control requirement.
For achieving the above object, the present invention adopts following technical scheme: a kind of combination Double-row Piles Support system, include front campshed, front campshed stake apical cap beam, rear campshed, rear campshed stake apical cap beam and linking beam, it is characterized in that: described front campshed is the placing of reinforcement concrete pile that parallel interval is arranged, described rear campshed is shaped steel Soil-cement piling wall, and described linking beam is two limb linking beams; Interpolation shaped steel in described shaped steel Soil-cement piling wall is H profile steel, and is exposed at the top of rear campshed stake apical cap beam outside the upper end of H profile steel; Also be provided with shallow layer reinforcement cement earth pile between described front campshed and rear campshed, and shallow layer reinforcement cement earth pile and overall overlap joint of shaped steel Soil-cement piling wall link together.
Described shallow layer reinforcement cement earth pile can be made up of front-seat shallow layer reinforcement cement earth pile and rear row's shallow layer reinforcement cement earth pile two campshed, and front-seat shallow layer reinforcement cement earth pile and overall overlap joint of rear row's shallow layer reinforcement cement earth pile link together.
The pile spacing of described shallow layer reinforcement cement earth pile can be identical with the pile spacing of front campshed.
The spacing of the interpolation shaped steel in described shaped steel Soil-cement piling wall can be one times, twice or three times of the pile spacing of front campshed.
The upper end of described H profile steel can be provided with shaped steel lifting eye.
The flange width that clear distance between two limbs of described pair of limb linking beam can be H profile steel adds 60mm.
The length that exposes of upper end above hat beam of described H profile steel can be and is not less than 500mm.
The main muscle of front campshed in described front campshed can anchor in front campshed stake apical cap beam on stake top, and anchorage length is not less than the tension anchorage length of 1.5 times.
Lengthways main steel bar in described linking beam can anchor in front campshed stake apical cap beam and rear campshed stake apical cap beam, and anchorage length is not less than the tension anchorage length of 1.5 times.
A kind ofly apply a kind of construction method combining Double-row Piles Support system, it is characterized in that construction sequence is as follows: step one, according to planning to build the hydrogeological conditions in place, base pit engineering geometric parameter, base pit engineering water proof, Antiseepage stability requirement, calculate a kind of each technical data combined required for Double-row Piles Support system of construction, step 2, according to construction project to be built site condition and surrounding enviroment condition, select particular location, to start to construct the cement mixing method of campshed after a section and one section of shallow layer reinforcement cement earth pile with triaxial cement mixing pile machine, before the cement mixing method setting and harden of the rear campshed of having constructed at this section, after next section of triaxial cement mixing pile machine displacement construction during the cement mixing method of campshed, start interpolation shaped steel and insert cement-soil stirring pile construction operation, interpolation shaped steel insertion cement-soil stirring pile construction operation completes in 30 minutes at the cement-soil stirring pile construction of corresponding position carries out, the height that shaped steel exposes is worn rear campshed stake apical cap beam and is extracted reserved requirement for height on need meeting, step 3, constantly repeat step 2, until to have constructed all rear campsheds, interpolation shaped steel and shallow layer reinforcement cement earth pile by designing requirement, step 4, construction front campshed, front campshed stake apical cap beam, rear campshed stake apical cap beam and linking beam, step 5, until after campshed meet seepage resistance demand time, carry out Ground Water Pumping during Excavation, when a kind of combination Double-row Piles Support system each several part all meets requirement of strength, carry out pit earthwork excavation, after step 6, excavation of foundation pit to projected depth, start Underground Construction, step 7, Underground Construction go out terrace, after the space backfill compacting between structure and Foundation Pit wall, pull out interpolation shaped steel, the space slip casting packing that interpolation shaped steel stays.
Compared with prior art the present invention has following characteristics and beneficial effect: the present invention is a kind of novel foundation pit supporting construction form integrating the native water proof function of gear, the deep-foundation pit engineering of water proof is needed, possession base basic field under being especially suitable for the geological conditionss such as weak soil, silt, fine sand.
The present invention is by being positioned at front-seat front-seat reinforced concrete pile and front campshed stake apical cap beam, be positioned at rear row's shaped steel Soil-cement piling wall and the rear campshed wall apical cap beam (namely campshed stake apical cap beam) of rear row, and the two limb linking beam compositions between the campshed of front and back, it is a kind of space gantry type supporting structure system, Water And Earth Pressures load can be born, there is the advantage that lateral deformation stiffness is large, effectively can control the side-move distortion of foundation ditch.
Calculating and the measured result of common double Row Piles Supporting Structure show, front campshed pressurized, rear campshed tension, the present invention takes full advantage of this loading characteristic of double-row pile, using reinforced concrete pile good for anti-pressure ability as front campshed, using H profile steel good for tensile property as rear campshed, give full play to the performance of material.
The present invention takes full advantage of the advantage of common double Row Piles Supporting Structure and shaped steel Soil-cement piling wall, namely overcome common double Row Piles Supporting Structure in the base pit engineering that need intercept water and need set up the defect of water-stop curtain, overcome again the defect that shaped steel Soil-cement piling wall rigidity is low.
The present invention's shaped steel Soil-cement piling wall replaces the rear placing of reinforcement concrete pile in common double Row Piles Supporting Structure, shaped steel Soil-cement piling wall has sealing, water proof, antiseepage function, therefore the water proof problem of base pit engineering is solved, overcome the defect that common double campshed needs to set up water-stop curtain, achieving supporting and protection structure gear soil and the unification of water proof, so without the need to separately establishing water-stop curtain, greatly reducing support engineering cost, decrease working procedure, save the construction period.
H profile steel in rear row's shaped steel Soil-cement piling wall in the present invention, terrace is gone out at Underground Construction, between structure and foundation ditch after the backfill of space, recycling can be extracted, significantly reduce support engineering cost, save resource, it also avoid and cause obstacle to the construction of other next-door neighbour's underground constructions follow-up.
Present invention overcomes the defect of shaped steel cement mixing piling wall lateral deformation stiffness deficiency, for general deep-foundation pit engineering, without the need to arranging inner support or anchor pole (anchor cable) in hole, being very easy to soil excavation and Underground Construction in foundation ditch, improve efficiency of construction.
The present invention arranges shallow layer reinforcement cement earth pile (shallow layer reinforcement cement mixing method) between front-seat reinforced concrete pile and rear row's shaped steel Soil-cement piling wall, such design improves collaborative work rigidity between front campshed and rear campshed wall, also improve the intensity of the active region soil body between front campshed and rear campshed simultaneously, reduce the load acted in supporting and protection structure, be conducive to the stressed and stable of supporting and protection structure.
The present invention replaces the reinforced concrete pile of common drill-pouring in the side (namely row) near land red-line with shaped steel Soil-cement piling wall, can reduce the adverse effect of drilling pouring pile hole construction to foundation ditch surrounding enviroment significantly.Specifically; shaped steel Soil-cement piling wall adopts three axes agitating pile machine to cut the soil body on the spot when constructing; and make the soil body and the abundant mix of cement grout form cement-soil; the cement-soil of flow regime is in the cement grout displacement that low pressure continues to inject; retentively descend cement-soil overall balance; so without the need to boring; there is not the collapse hole phenomenon during construction of common double campshed; therefore the disturbance to surrounding soil can be reduced; reduce the harm to periphery pipeline, underground building structure etc., effectively protect surrounding enviroment.
The present invention first constructs near the shaped steel Soil-cement piling wall of land red-line side (namely row); rear construction is positioned at front-seat reinforced concrete pile; the shaped steel Soil-cement piling wall of first constructing is formed between the reinforced concrete pile and surrounding enviroment medium of rear construction isolates curtain; reduce reinforced concrete pile drilling construction bring out the adverse effect of soil body damage to surrounding medium, effectively protect surrounding enviroment.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention will be further described in detail.
Fig. 1 is that solid of the present invention arranges schematic diagram.
Fig. 2 is Double-row Piles Support mechanics model schematic diagram of the present invention.
Fig. 3 is schematic top plan view of the present invention.
Fig. 4 is that pile body of the present invention arranges schematic top plan view.
Reference numeral: arrange shallow layer reinforcement cement earth pile, 8-shaped steel lifting eye after campshed stake apical cap beam, 6-linking beam, 7-shallow layer reinforcement cement earth pile, the front-seat shallow layer reinforcement cement earth pile of 7.1-, 7.2-after campshed, 4-interpolation shaped steel, 5-after campshed stake apical cap beam, 3-before campshed, 2-before 1-.
Detailed description of the invention
Embodiment is see shown in Fig. 1-4, and this combination Double-row Piles Support system, includes front campshed 1, front campshed stake apical cap beam 2, rear campshed 3, rear campshed stake apical cap beam 5 and linking beam 6.
The placing of reinforcement concrete pile that described front campshed 1 is arranged for parallel interval, described rear campshed 3 is shaped steel Soil-cement piling wall, and described linking beam 6 is two limb linking beams (shaped steel be convenient in shaped steel Soil-cement piling wall is pulled out).
Interpolation shaped steel 4 in described shaped steel Soil-cement piling wall is H profile steel, and is exposed at the top of rear campshed stake apical cap beam 5 outside the upper end of H profile steel.In the present embodiment, the upper end of H profile steel is also provided with shaped steel lifting eye 8, and the protruded length of H profile steel on stake apical cap beam is for being not less than 500mm.
Also be provided with shallow layer reinforcement cement earth pile 7 between described front campshed 1 and rear campshed 3, and shallow layer reinforcement cement earth pile 7 links together with overall overlap joint of shaped steel Soil-cement piling wall.Shallow layer reinforcement cement earth pile 7 only needs to arrange on support system top.
The row of described shallow layer reinforcement cement earth pile 7 and lap width can be determined according to forward and backward campshed spacing.In the present embodiment, shallow layer reinforcement cement earth pile 7 is made up of front-seat shallow layer reinforcement cement earth pile 7.1 and rear row's shallow layer reinforcement cement earth pile 7.2 liang of campsheds, and front-seat shallow layer reinforcement cement earth pile and overall overlap joint of rear row's shallow layer reinforcement cement earth pile 7.2 link together.Certainly, in other embodiments, shallow layer reinforcement cement earth pile 7 also can only have a campshed, also can be three campsheds or more campshed.
In the present embodiment, the pile spacing between shallow layer reinforcement cement earth pile 7 is identical with the pile spacing between front campshed 1, and in other embodiments, the pile spacing of shallow layer reinforcement cement earth pile 7 also can not be identical with the pile spacing of front campshed 1.
In the present embodiment, the spacing of the shaped steel in shaped steel Soil-cement piling wall is one times of the pile spacing of front campshed 1, and the spacing of the shaped steel namely in shaped steel Soil-cement piling wall is identical with the pile spacing of front campshed 1.In other embodiments, the spacing of the shaped steel in shaped steel Soil-cement piling wall is the twice or three times of the pile spacing of front campshed 1.
Clear distance a between two limbs of described pair of limb linking beam is that the flange width b of H profile steel adds about 60mm.
The main muscle of front campshed in described front campshed 1 anchors in front campshed stake apical cap beam 2 on stake top, and anchorage length is not less than the tension anchorage length of 1.5 times.
Lengthways main steel bar in described linking beam 6 anchors in front campshed stake apical cap beam 2 and rear campshed stake apical cap beam 5, and anchorage length is not less than the tension anchorage length of 1.5 times.
The present invention is when carrying out intensity, stabilization and deformation calculating, carry out calculating by the double-row pile be made up of front campshed 1, front campshed stake apical cap beam 2, shaped steel 4, rear row's shaped steel Soil-cement piling wall apical cap beam 5, two limb linking beam 6 to try to achieve, and determine that the diameter of front campshed, arrangement of reinforcement, building-in depth and level are to spacing according to designing requirement, and the model of shaped steel in shaped steel Soil-cement piling wall, the sectional dimension of two limb continuous beam, concrete class and arrangement of reinforcement.
The length of the cement earth pile in described shaped steel Soil-cement piling wall is determined (being required the large person's value determined by shaped steel length and foundation ditch sealing, antiseepage) jointly by shaped steel length and foundation ditch sealing, antiseepage, and the pile strength of the cement earth pile in shaped steel Soil-cement piling wall need meet sealing and Strength co-mputation requirement.
A kind of construction method combining Double-row Piles Support system of this application, its construction sequence is as follows.
Step one, according to planning to build the hydrogeological conditions in place, base pit engineering geometric parameter, base pit engineering water proof, Antiseepage stability requirement, calculate a kind of each technical data combined required for Double-row Piles Support system of construction.Specifically, first according to hydrogeological conditions and the base pit engineering geometric parameter of planning to build place, carry out supporting and protection structure intensity, support system stability and distortion to calculate, determine the diameter of front campshed 1, coagulation strength grade, sectional reinforcement, building-in depth and level interval etc., the model of shaped steel 4 and length, the sectional dimension of linking beam 6, concrete class and arrangement of reinforcement etc.Then require and the calculated length of shaped steel 4 according to base pit engineering water proof, Antiseepage stability, determine the length of rear campshed 3.The pile strength of rear campshed 3 should meet calculation requirement, and transmission coefficient meets sealing requirement.
Step 2, according to construction project to be built site condition and surrounding enviroment condition, select particular location, to start to construct the cement mixing method of campshed 3 after a section and one section of shallow layer reinforcement cement earth pile 7 with triaxial cement mixing pile machine, before the cement mixing method setting and harden of the rear campshed 3 of having constructed at this section, after next section of triaxial cement mixing pile machine displacement construction during the cement mixing method of campshed 3, start interpolation shaped steel 4 and insert cement-soil stirring pile construction operation, interpolation shaped steel 4 inserts cement-soil stirring pile construction operation and completes in 30 minutes at the cement-soil stirring pile construction of corresponding position and carry out, the height that shaped steel exposes is worn rear campshed stake apical cap beam 5 and is extracted reserved requirement for height on need meeting.
Step 3, constantly repeat step 2, until to have constructed all rear campsheds 3, interpolation shaped steel 4 and shallow layer reinforcement cement earth pile 7 by designing requirement.
Step 4, construction front campshed 1, front campshed stake apical cap beam 2, rear campshed stake apical cap beam 5 and linking beam 6.Specifically, before construction, the stake of campshed 1 is pushed up main muscle length in reserve and need be met anchoring and require before campshed 1() while, the construction of campshed stake apical cap beam 2, rear campshed stake apical cap beam 5 and linking beam 6 is carried out with front-seat pile driving construction substep, the work progress of campshed stake apical cap beam 2, rear campshed stake apical cap beam 5 and linking beam 6 is, the reinforcing bar of first colligation front campshed stake apical cap beam, rear campshed stake apical cap beam reinforcing bar and the reinforcing bar of linking beam, it is integrated poured then to carry out concrete.
Step 5, until after campshed 3 meet seepage resistance demand time, carry out Ground Water Pumping during Excavation, when a kind of combination Double-row Piles Support system each several part all meets requirement of strength, carry out pit earthwork excavation.
After step 6, excavation of foundation pit to projected depth, start Underground Construction.
Step 7, Underground Construction go out terrace, after the space backfill compacting between structure and Foundation Pit wall, pull out interpolation shaped steel (shaped steel namely in shaped steel Soil-cement piling wall reclaims after being used to complete), the space slip casting packing that interpolation shaped steel stays.
Content described in this manual embodiment is only enumerating the way of realization that the present invention conceives; protection scope of the present invention should not be regarded as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention also and conceive the equivalent technologies means that can expect according to the present invention in those skilled in the art.
Claims (9)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104594360A (en) * | 2014-12-31 | 2015-05-06 | 云南建工基础工程有限责任公司 | Composite double-row pile foundation pit supporting structure |
| CN104762975B (en) * | 2015-02-10 | 2016-05-25 | 云南建工基础工程有限责任公司 | A kind of H type Double-row-piles Structure that adds core rotary churning pile that is provided with |
| CN104695446B (en) * | 2015-03-13 | 2016-08-24 | 朱奎 | Basement construction method for supporting |
| CN106087975B (en) * | 2015-11-20 | 2020-09-22 | 上海市政工程设计研究总院（集团）有限公司 | Pile top ring beam structure based on SMW (soil mixing wall) construction method and construction method thereof |
| CN105714830B (en) * | 2016-02-03 | 2017-09-26 | 华侨大学 | It is a kind of to be used for the connecting plate of special-shaped double-row pile |
| CN105714831A (en) * | 2016-02-03 | 2016-06-29 | 华侨大学 | Abnormal-shape double-row pile for supporting foundation pit side wall and construction method of abnormal-shape double-row pile |
| CN105755948A (en) * | 2016-04-15 | 2016-07-13 | 上海市城市建设设计研究总院 | Trestle structure combined with smw (soil mixing wall) working method enclosure |
| CN106284296B (en) * | 2016-09-28 | 2019-04-23 | 南京工业大学 | A kind of supporting construction and its construction method of double steel sheet pile |
| CN109778867A (en) * | 2018-12-28 | 2019-05-21 | 上海建工集团股份有限公司 | A kind of self-supporting Composite Enclosure Structure and its construction method |
| CN110820763A (en) * | 2019-11-29 | 2020-02-21 | 兰州理工大学 | Truss type cast-in-situ bored pile supporting method for mucky soil deep foundation pit |
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| KR20090029993A (en) * | 2007-09-19 | 2009-03-24 | 주식회사 한미파슨스건축사사무소 | Underground structure and its construction method with retaining wall supported by rigid diaphragm |
| CN201241327Y (en) * | 2008-05-28 | 2009-05-20 | 天津大学建筑设计研究院 | Section steel and soil cement composite double rows pile |
| CN202689008U (en) * | 2012-06-11 | 2013-01-23 | 东南大学 | Supporting structure for double-row prefabricated high-strength concrete thin-walled steel pipe pile foundation pit |
| CN202989937U (en) * | 2012-12-05 | 2013-06-12 | 昆明理工大学 | Grille-type double-row pile supporting structure |
| CN203729308U (en) * | 2014-01-24 | 2014-07-23 | 中国建筑股份有限公司 | Double-row pile supporting system of reinforced concrete pile combined structural steel cement mixing pile wall |
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