CN208023591U - A kind of foundation pit supporting construction of steel sheet pile combined deposited pile - Google Patents

A kind of foundation pit supporting construction of steel sheet pile combined deposited pile Download PDF

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Publication number
CN208023591U
CN208023591U CN201820372199.4U CN201820372199U CN208023591U CN 208023591 U CN208023591 U CN 208023591U CN 201820372199 U CN201820372199 U CN 201820372199U CN 208023591 U CN208023591 U CN 208023591U
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pile
steel sheet
sheet pile
foundation pit
concrete
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赵升峰
章新
陈祉阳
储征伟
刘俊生
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Nanjing Surveying And Mapping Investigation And Research Institute Ltd By Share Ltd
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Nanjing Surveying And Mapping Investigation And Research Institute Ltd By Share Ltd
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Abstract

The utility model discloses a kind of foundation pit supporting constructions of steel sheet pile combined deposited pile, including the steel sheet pile of foundation pit shallow-layer and the bored concrete pile of deep layer to combine the supporting construction to be formed;The steel sheet pile uses snapping water-stopping steel sheet pile, and steel sheet pile cross section both ends are respectively arranged with card convex structure and the notch with card convex symmetrical configuration.The supporting construction and construction method be suitable for proposed place upper formation be banket, the aquifers such as weak soil or silt;Lower part is the geological condition of the hard soil body or decayed rock.N is the integer not less than 2.The supporting construction top uses steel sheet pile, can play a dual role of earth-retaining and sealing;Earth-retaining bored concrete pile is only arranged, it is not necessary that water-seal pile, saving construction cost is arranged in the hard soil layer in lower part or rock;The steel sheet pile later stage can pull out, environmentally protective, saving construction cost;After steel sheet pile construction, you can excavate, need not conserve, during shallow-layer soil excavation, while deep layer bored concrete pile is conserved;After steel sheet pile is extracted, barrier is not stayed, building peripheral conduits is facilitated to construct.

Description

A kind of foundation pit supporting construction of steel sheet pile combined deposited pile
Technical field
The utility model is related to a kind of foundation pit supporting constructions of steel sheet pile combined deposited pile in civil engineering, belong to building Engineering field, the deep foundation pit support suitable for architectural engineering, dyke building, pipeline engineering, subway engineering.
Background technology
Base pit engineering not only faces excavation earth-retaining, and faces water seepage prevention, but as the foundation pit supporting pile of temporary structure, It is short using the period, of high cost.Therefore, shorten the foundation pit duration and reduce support pile cost, it has also become must solve the problems, such as, especially Its in the proposed foundation pit place shallow-layer soil body be banket or loose silt, sand, and foundation pit place deep soil be hard soil or When decayed rock excavation pit, the shallow-layer soil body not only needs that retaining support stake is arranged, it is also necessary to water seepage prevention stake be arranged;But deep layer The hard soil body and decayed rock are not necessarily to water-seal pile.Conventional deep foundation pit support all uses the supporting construction of bored concrete pile combination water-seal pile Form.
Bored concrete pile and water-seal pile are all constructed since ground, until the lowermost designed elevation.Water-seal pile is outside bored concrete pile Side is constructed, and the supporting construction of two campsheds is formed.But for foundation pit shallow-layer because cutting depth is small, Water And Earth Pressures are smaller, if entire stake up and down Body diameter is identical, this is bound to cause the wasting of resources;After filling pile construction, concrete need to conserve 28 days can excavation pit, This is bound to cause time waste again.After foundation pit construction, after major structure of construction binds, rainwater, dirt used in whole building group The pipelines such as water, electric power, heating power are all embedded along building periphery, and the supporting bored concrete pile constructed occupies pipeline construction position, also Bored concrete pile need to be abolished, not only difficulty of construction is big for this, and results in waste of resources.
Chinese patent(Application number:CN201610949378.5)" a kind of construction method of deep foundation pit support " is disclosed, It is characterized in that Larsen steel sheet pile and bored pile construction in same absolute altitude, are separately positioned on the different sections of foundation pit, and in Larsen Water-seal pile is set on the outside of steel sheet pile and cast-in-situ bored pile, bracing members are set among two rows of Larsen steel sheet piles and cast-in-situ bored pile.This Although kind of an engineering method steel sheet pile can be extracted, bracing members can be removed, and recycling has the disadvantages that:(1)Unresolved deep Layer pattern foundation pit supporting structure is not required to the problem of setting water-seal pile, still not economical enough;(2)Bored concrete pile pile body is still started setting up from ground, after Phase pipeline is embedded, it is still necessary to abolish bored concrete pile;(3)It is to banket and loose earth for foundation pit place shallow-layer, place deep layer is heavily fortified point The case where pan soil body or decayed rock, Larsen steel sheet pile can not can not be formed effectively in inserting piling to the hard soil body and decayed rock Foundation pit supporting construction.
Chinese patent(Application number:CN201710236901.4)Disclose a kind of " foundation pit branch that campshed is combined with steel sheet pile Maintaining method ", including:Using several bored concrete piles as campshed, steel sheet pile, this method then are installed between two adjacent bored concrete piles Organically it is combined with bored concrete pile supporting intensity height and the characteristics of steel sheet pile is easily installed dismounting.But still it has the following defects:(1)Cause Bored concrete pile is arranged with steel sheet pile interval in the invention, therefore the maintenance problem of still unresolved bored concrete pile, and it is big still to occupy entire engineering The part duration;(2)Steel sheet pile is arranged at intervals between bored concrete pile, because bored concrete pile cast in situs is formed, when bored concrete pile appearance is expanding When situation, steel sheet pile will be unable to construct;(3)Bored concrete pile is arranged with steel sheet pile interval, and after excavation of foundation pit, stress occurs for bored concrete pile After deformation, it certainly will so that steel sheet pile such as also bends at the deformations, is stuck between bored concrete pile, later stage steel sheet pile will be unable to extract.
Therefore, it can banket in shallow-layer there is an urgent need to one kind or loose earth, the field of the hard soil body of deep layer or decayed rock Ground, design one kind can fully consider foundation pit earth-retaining and sealing requirement and shorten the construction period, saving construction cost, and will not give the later stage The embedded foundation pit supporting construction for bringing constructional difficulties of pipeline.The foundation pit supporting construction of steel sheet pile combined deposited pile is under these conditions It comes into being, becomes and solve the problems, such as this effective ways.
Invention content
The utility model aim is to provide a kind of foundation pit supporting construction of steel sheet pile combined deposited pile, in traditional Larsen steel plate Stake, bored concrete pile are individually used on the basis of pattern foundation pit supporting structure, change the snap fit of Larsen steel sheet pile, and change former supporting construction Combining form and construction method form the foundation pit shallow-layer soil body steel sheet pile earth-retaining and sealing, foundation pit Deep Rock soil body bored concrete pile The new supporting structure of earth-retaining.Concrete engineering according to soil body thickness and range, can be determined by calculation the model of steel sheet pile and beat Enter the diameter, strength grade of concrete and arrangement of reinforcement of depth and bored concrete pile;According to the guarantor of the cutting depth of foundation pit and surrounding enviroment Shield requires, and one or multi-channel inner support is arranged.
What the purpose of this utility model was realized in:
A kind of foundation pit supporting construction of steel sheet pile combined deposited pile, including the steel sheet pile 1 of foundation pit shallow-layer and the perfusion of deep layer The supporting construction that 2 combination of stake is formed;
The steel sheet pile 1 uses snapping water-stopping steel sheet pile, and 1 cross section both ends of steel sheet pile are respectively arranged with card convex structure 102 and with 102 symmetrical notch 101 of card convex structure;
The steel sheet pile 1 is in stake top 1.0m H profile steel purlins 4 arranged below, and sectional dimension is according to determination is calculated, simultaneously According to calculating and setting inner support 401;4 lower section of steel purlin is provided with steel purlin shelf bracket 5;Setting among steel purlin 4 There is first of support 3;
The cast-in-place concrete pile that the bored concrete pile 2 is formed using drill-pouring method or pressure filling;The bored concrete pile 2 Top setting concrete Guan Liang 7, while according to calculating, concrete Guan Liang inner support is set;
The steel sheet pile 1 is whole by concrete force transmitting board band 9 and bored concrete pile top concrete Guan Liang 7 with bored concrete pile 2 It pours and links together;It is provided with steel sheet pile separation layer 6 between the concrete force transmitting board band 9 and bored concrete pile 2;
Second support 8 is provided between the bored concrete pile top concrete Guan Liang 7;Second supports 8 both ends and mixes It is provided with steel end plate 10 between solidifying soil Guan Liang 7;
The inside of the bored concrete pile 2 is provided with concrete purlin 11, and third road branch is provided between concrete purlin 11 Support 12;
The construction method of the foundation pit supporting construction of the steel sheet pile combined deposited pile, it is characterised in that including constructing as follows Step:
Step1. surveying setting-out:After levelling of the land, the coordinate of each steel sheet pile and bored concrete pile is measured, and is made detailed Label, while the axis of measuring building structure check the exterior wall relationship of foundation pit supporting pile and hypogee structure, it is ensured that supporting knot Structure does not influence the construction of hypogee structure;
Step2. support pile test pile:Report is surveyed in base area, selects the region of stratum big rise and fall, and steel plate is broken in first experiment examination Stake and bored concrete pile are no less than 5, check specific buried depth and the position of underground hard stratum, and then determine the construction of every steel sheet pile Length;Then the specific cutting depth on upper layer cubic metre of earth, the i.e. position of bored concrete pile hat bottom elevation are checked according to current specifications;
Step3. steel sheet pile construction:Steel sheet pile is measured according to fixed position, depth, and the position of corresponding foundation pit Setting-out performs construction note by root inserting piling steel sheet pile;
Step4. filling pile construction:After steel sheet pile construction, bored concrete pile is according to excavation stock tank, slurry ditch → shield-tube embedment → drilling machine is in place, hole bit correction → pore-forming, mud cycle, removes useless slurry, body refuse → first time borehole cleaning → inspection of quality → lower steel Muscle cage and steel conduit → second of borehole cleaning → pour underwater concrete → pile process and carry out;
Step5. foundation pit first layer earth excavation:After waiting for filling pile construction, layering, piecemeal, symmetrical earth excavation, Until being excavated to first of support bottom absolute altitude;
Step6. first of Construction of Supporting finishes, and after reaching design strength requirement, continues downward excavation construction, until Construction to bored concrete pile is preced with bottom elevation;
Step7. patch isolation malthoid on the inside of steel sheet pile, abolishes bored concrete pile stake top concrete laitance, by bored concrete pile Exposed reinforcement Out, length reaches anchoring and requires, and then binds Guan Liang and power transmission Strip muscle, installs Guan Liang and force transmitting board band template, pours Concrete, while second support is set;
Step8. after Guan Liang and second support reach design strength requirement, downward excavation construction, and according to design requirement The support of the roads N is set, and wherein construction technology and method and second support phase is same.
Positive beneficial effect:The foundation pit shallow-layer of the utility model uses steel sheet pile, can not only play earth-retaining, but also can play sealing Effect;Because foundation pit top Water And Earth Pressures are smaller, using steel sheet pile supporting, support pile section is comparable in foundation pit deep support stake It is much smaller, supporting cost can be saved;When foundation pit deep soil is the hard soil body or elegance and talent rock, it is not necessary that water-seal pile is arranged, therefore, Bored concrete pile earth-retaining, saving construction cost is only arranged in foundation pit deep support structure;Engineering site, because grout pile top mark height is in below ground Certain depth, therefore, steel sheet pile of first constructing, bored concrete pile of constructing afterwards, to the end of filling pile construction, you can excavation pit first Layer soil body, at this time the bored concrete pile of deep layer can be conserved, therefore, the entire duration of a project can be saved;After pit earthwork backfill, steel plate Stake can pull out, environmentally protective while saving construction cost;According to bored concrete pile supporting, the construction of later stage architecture pipe needs brokenly It removes, not only waste of resource, and wastes working measure and take, and after steel sheet pile is extracted, barrier is not stayed, and the later stage is facilitated to build peripheral tubes It constructs in road.
Description of the drawings
Fig. 1 is supporting construction diagrammatic cross-section in the present invention;
Fig. 2 is Steel Sheet Pile supporting construction floor map of the present invention;
Fig. 3 is main construction process figure in construction method of the present invention;
Fig. 4 is Steel Sheet Pile of the present invention and steel purlin connection figure.
Fig. 5 is load transfering strip figure between Steel Sheet Pile and bored concrete pile of the present invention;
Fig. 6 is bracing members and concrete Guan Liang connecting node figure one in the present invention;
It is bracing members and concrete Guan Liang connecting node figure two in the present invention that Fig. 7, which is the present invention,;
It is in figure:Steel sheet pile 1, bored concrete pile 2, first of support 3, steel purlin 4, steel purlin shelf bracket 5, steel sheet pile isolation Layer 6, concrete Guan Liang 7, second support 8, load transfering strip 9, steel end plate 10, concrete purlin 11, third road support 12.
Specific implementation mode
In order to make the technical means, creative features, achievement of purpose, and effectiveness of the utility model be easy to understand, with It is lower combination the drawings and specific embodiments to the utility model proposes steel sheet pile combined deposited pile foundation pit supporting construction and construction Method is described further.According to following explanation, will be become apparent from feature the advantages of the utility model.It should be noted that attached drawing The form for being all made of non-normalizing uses non-accurate ratio, only to convenient, lucidly aid illustration the utility model is implemented The purpose of example.
Below constitutional diagram 1 to Fig. 7 steel sheet pile combined deposited piles that the present invention will be described in detail supporting construction and construction method. It is characterized in that:It include mainly foundation pit shallow-layer steel sheet pile(1), deep layer bored concrete pile(2)With vertically arranged inner support.
The basic ideas of the utility model are:Further investigated according to geological exploration data first place shallow-layer banket or pine The distribution and thickness for dissipating the soil body and the hard soil layer of deep layer or decayed rock, then calculate separately determining foundation pit shallow-layer steel Sheet pile(1)With deep layer bored concrete pile(2)Length and sectional dimension;After figure detailed design to be onstructed, live measuring determines steel sheet pile With the Specific construction position of bored concrete pile, and steel sheet pile of first constructing, bored concrete pile of constructing afterwards;Then the excavation pit soil body, and according to setting Count drawing requirement, construction steel purlin(4), steel shelf bracket(5)And first of support(3);Continue to excavate the soil body downwards, construction Steel sheet pile separation layer(6), and bored concrete pile top concrete Guan Liang of constructing(7), concrete power transmission between steel sheet pile and bored concrete pile Band(9)It is supported with second(8);Continue to excavate Rock And Soil downwards, and is required according to design drawing, coagulation on the inside of construction bored concrete pile Fortifield village's purlin(11)And bury supporting steel end plate (10) and third road inner support(12);Continue to excavate Rock And Soil downwards, until excavating To the foundation pit bottom absolute altitude of design.
The supporting construction and construction method of the steel sheet pile combined deposited pile of the present invention, specifically include following steps:
Step1. surveying setting-out after levelling of the land, measures the coordinate of each steel sheet pile and bored concrete pile, and makees detailed Label;The axis of measuring building structure simultaneously checks the exterior wall relationship of foundation pit supporting pile and hypogee structure, it is ensured that supporting knot Structure does not influence the construction of hypogee structure;The position setting-out for carrying out pile foundation to the principle of part from entirety, rule are pressed in stake position setting-out When Sliding bicycle route, sidewalk is made to be maintained a certain distance with the position of steel sheet pile and bored concrete pile, in order to avoid influence piling and pore-forming Hole wall is stablized.
Step2. support pile test pile.Report is surveyed in base area, selects the region of stratum big rise and fall, and steel plate is broken in first experiment examination Stake and bored concrete pile are no less than 5, check specific buried depth and the position of underground hard stratum, and then further determine that every steel sheet pile Construction length.Then the specific cutting depth on upper layer cubic metre of earth, i.e. bored concrete pile top concrete Guan Liang are checked according to current specifications The position of bottom absolute altitude.Steel sheet pile rejects connection fore shaft rust to steel sheet pile before piling using loop wheel machine band vibration hammer injection by root inspection It loses, deform serious stake, just can be used after failure is to be trimmed, the preceding grease in the fore shaft of sheet pile of piling is beaten with facilitating Enter to extract;Gradient of the monitoring per pile is measured during inserting piling at any time and is no more than 2%, when deflection is excessive cannot be with pulling together method tune Timing is pulled up and is beaten again.
Step3. steel sheet pile construction.Steel sheet pile is according to fixed position, depth, to correspond to the position of foundation pit, by correspondence Sideline in foundation pit surveying and locating by root inserting piling steel sheet pile, and perform construction note.Steel sheet pile injection squeezes into method using screen-type, 10 ~ 20 sheet piles are in a row inserted into saddle when construction, it is in screen shape, then injection again, usually by screen panel both ends to make it One group of steel sheet pile is beaten to designed elevation, and strictly controls verticality, and electricity consumption solid welding is scheduled in steel purlin, then it is intermediate in order 1/3 or 1/2 steel sheet pile height is divided to squeeze into.
Step4. filling pile construction.After steel sheet pile construction, bored concrete pile is according to excavation stock tank, slurry ditch → shield-tube embedment → drilling machine is in place, hole bit correction → pore-forming, mud cycle, removes useless slurry, body refuse → first time borehole cleaning → inspection of quality → lower steel The process that muscle cage and steel conduit → second of borehole cleaning → pour underwater concrete → pile carries out.
Step5. foundation pit first layer earth excavation.After waiting for filling pile construction, layering, piecemeal, symmetrical earth excavation, Until being excavated to first layer support bottom absolute altitude.Construction steel purlin, wherein steel purlin use the Q235B grades of shaped steel of H400 × 400, steel to enclose Q235B grades are arranged under purlin, and [the equilateral right angled triangle bracket of 32b channel steels, the triangular right-angle length of side are more than the wide 200mm of steel purlin;Steel After the completion of purlin and the construction of steel bracket, sets up first of support and be fixed in steel purlin by welding or bolt.
Step6. first layer Construction of Supporting finishes, and after application prestressing force reaches design requirement, continues to excavate ground downwards Body, until construction to concrete is preced with bottom elevation.
Step7. the cementing isolation malthoid of II type pitch binder applied is pasted on the inside of steel sheet pile;Bored concrete pile stake top concrete laitance is abolished, Bored concrete pile Exposed reinforcement is come out, length reaches anchoring and requires, and load transfering strip reinforcing bar is then bound, wherein in the use of load transfering strip reinforcing bar Layer is up and down HPB grades 16, and outer layer is HPB grades 18, and spacing is 200mm;Guan Liang reinforcing bar is bound, while in Guan Liang reinforcing bar Support connection steel end plate is buried in cage, it is -600 × 600 × 20 that wherein steel end plate, which uses Q235B steel, section,;Reinforcing bar is bound After, supporting module pours Guan Liang and load transfering strip concrete;Second support is set up, wherein second supporting welding is pre- On the steel end plate buried, it is made to be closely joined together with concrete Guan Liang.
Step8. Guan Liang and power transmission band strength reach design requirement, and after second support applies prestressing force, continuation is opened downwards Excavation construction, according to the construction method of above-mentioned second support and Guan Liang, is applied until excavating Rock And Soil to third road supports bottom absolute altitude Work cast-in-place pile concrete purlin and the support of third road.
Step9. wait for that concrete purlin reaches design strength, after the support of third road applies prestressing force, continuation is opened downwards Rock And Soil is dug, until foundation pit bottom absolute altitude;The subsequent construction method of foundation pit is consistent with traditional foundation ditch construction method, repeats no more.
The foundation pit shallow-layer of the utility model uses steel sheet pile, can not only play earth-retaining, but also can play the role of sealing;Because of foundation pit Top Water And Earth Pressures are smaller, and using steel sheet pile supporting, support pile section is comparable much smaller in foundation pit deep support stake, can save Supporting cost;When foundation pit deep soil is the hard soil body or elegance and talent rock, it is not necessary that water-seal pile is arranged, therefore, foundation pit deep support Bored concrete pile earth-retaining, saving construction cost is only arranged in structure;Engineering site, because of the grout pile top mark high depth certain in below ground Place, therefore, steel sheet pile of first constructing, bored concrete pile of constructing afterwards, to the end of filling pile construction, you can the first layer soil body of excavation pit, this When deep layer bored concrete pile can be conserved, therefore, the entire duration of a project can be saved;After pit earthwork backfill, steel sheet pile can pull out It removes, environmentally protective while saving construction cost;According to bored concrete pile supporting, the construction of later stage architecture pipe needs to abolish, not only unrestrained Take resource, and wastes working measure and take, and after steel sheet pile is extracted, barrier is not stayed, facilitates later stage building peripheral conduits construction.
Basic principles and main features and advantages of the present invention described above and that describe the present invention, only of the invention Preferred embodiment is not intended to limit the invention, all within the spirits and principles of the present invention made by it is any modification, etc. With replace and improve etc., should be included in the present invention claims protection domain within.

Claims (5)

1. a kind of foundation pit supporting construction of steel sheet pile combined deposited pile, it is characterised in that:Steel sheet pile including foundation pit shallow-layer and depth The bored concrete pile of layer combines the supporting construction to be formed;
The steel sheet pile uses snapping water-stopping steel sheet pile, and steel sheet pile cross section both ends are respectively arranged with card convex structure and and card convex The notch of symmetrical configuration;
The cast-in-place concrete pile that the bored concrete pile is formed using drill-pouring method or pressure filling;The bored concrete pile stake top setting Concrete Guan Liang, solidifying native Guan Liang inner support.
2. a kind of foundation pit supporting construction of steel sheet pile combined deposited pile according to claim 1, it is characterised in that:Described Steel sheet pile is in stake top 1.0m H profile steel purlins arranged below, inner support;It is provided with steel purlin triangle support below the steel purlin Frame;First of support is provided among steel purlin.
3. a kind of foundation pit supporting construction of steel sheet pile combined deposited pile according to claim 1, it is characterised in that:Described Steel sheet pile is linked together with bored concrete pile by concrete force transmitting board band and bored concrete pile top concrete Guan Liang one-piece casting;It is described Concrete force transmitting board band and bored concrete pile between be provided with steel sheet pile separation layer.
4. a kind of foundation pit supporting construction of steel sheet pile combined deposited pile according to claim 1, it is characterised in that:Described Second support is provided between bored concrete pile top concrete Guan Liang;Second supports to be provided between both ends and concrete Guan Liang Steel end plate.
5. a kind of foundation pit supporting construction of steel sheet pile combined deposited pile according to claim 1, it is characterised in that:Described It is provided with concrete purlin on the inside of bored concrete pile, the support of third road is provided between concrete purlin.
CN201820372199.4U 2018-03-19 2018-03-19 A kind of foundation pit supporting construction of steel sheet pile combined deposited pile Active CN208023591U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110924433A (en) * 2019-12-09 2020-03-27 中交铁道设计研究总院有限公司 Design method of subway foundation pit foot-hanging pile enclosure structure in upper-soft lower-hard rock stratum

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110924433A (en) * 2019-12-09 2020-03-27 中交铁道设计研究总院有限公司 Design method of subway foundation pit foot-hanging pile enclosure structure in upper-soft lower-hard rock stratum

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