CN206090547U - Strength nature composite pile of dysmorphism - Google Patents

Strength nature composite pile of dysmorphism Download PDF

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Publication number
CN206090547U
CN206090547U CN201621132653.6U CN201621132653U CN206090547U CN 206090547 U CN206090547 U CN 206090547U CN 201621132653 U CN201621132653 U CN 201621132653U CN 206090547 U CN206090547 U CN 206090547U
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pile
prefabricated
cement
stake
stiff composite
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CN201621132653.6U
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刘全林
张衡
张扬
宋伟民
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Shanghai Qiangjin Foundation Engineering Co Ltd
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Shanghai Qiangjin Foundation Engineering Co Ltd
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Abstract

The utility model provides a strength nature composite pile of dysmorphism, including the high -strength steel bar concrete body or the piling bar of a cement or a curing agent stirring stake and a prefabrication, through the composite action of prefabricated pile body uneven surface with solidified soil, vertical bearing capacity of pile foundation in the soft soil foundation (resistance to compression and resistance to plucking bearing capacity) and horizontal bearing capacity have been improved. The uneven surface and the basic solidified soil of cement of prefabricated pile body spout stirring stake interlock together soon, increase the area of contact on pile foundation and ground layer, play an active role is protected to foundation ditch excavation process's pile foundation in the top and the bottom that enlarge, and the pile body adopts screw lock formula mechanical connection, has solved the durability difficult problem of pile foundation to shorten construction period effectively, reduced engineering cost.

Description

A kind of stiff composite pile of abnormity
Technical field
This utility model is related to technical field of civil engineering, more particularly to foundation and underground structure resistance to compression and resistance to plucking Stake, the resistance to compression and uplift pile of high-rise buildings.
Background technology
With urban construction, the high speed development of traffic engineering, the development and utilization of the underground space develops into trend.Therewith , impact of the buoyancy to underground structure produced by subsoil water be especially prominent, when underground structure buried depth it is bigger, then by subsoil water The buoyancy of generation is then higher.Effect of the groundwater pressure to underground structure is mainly manifested in:Basement bottom board swells, basement leakage Water is until coal seam floor failure;Overall uneven floating for underground structure, can cause at beam-column node cracking, bottom slab crack and build Build inclination of thing etc..In order to meet the needs of this basic stress balance, at present typically using uplift pile technology or increase building Solving, use of the uplift pile therein in underground structrue engineering is more universal, and uplift pile is used as pile foundation for the forms such as thing counterweight In one kind, increasingly paid attention to by engineering circles at present.By uplift pile produce withdrawal resistance to offset Groundwater under structure The buoyancy of generation.Uplift pile has emerged various resistance to plucking pile body versions through the development of decades, from uiform section drilling Bored concrete pile is to prestress pulling resistant stake and reducing uplift pile etc., but these pile-type still suffer from many defects.
For the little high-rise or skyscraper generally built in city, be both needed to arrange pressure-bearing pile foundation in ground, prefabricated pile and Cast-in-situ bored pile is the pile-type for commonly using, because the soil compaction of the bearing capacity finite sum pile driving process of prefabricated pile is made to surrounding edge environment Into destruction, cause use of the prefabricated pile in these areas strongly limit.
Drilling or rotary digging bored concrete pile, used as the most frequently used pressure-bearing and pull-out resistant pile foundation, there are the following problems in application process:
(1) the thickness of protection tier requirement of bored concrete pile is difficult to ensure that, such as existing《Technical code for building pile foundation》 JGJ94 allows pouring pile hole construction stake footpath deviation -50mm, and when there is stake footpath minus deviation, protective layer thickness is zero.
(2) the concrete construction quality problem of bored concrete pile, such as pile body necking down, hole wall collapse, bottom hole sediment, pile body cavity, honeybee The mass defects such as nest, broken pile, folder mud, the mass defect of concrete loses the protective effect to reinforcing bar, affects the durable of bored concrete pile Property.
(3) damage problem of the end bar process to reinforcing bar is stripped out, for example, strips out reinforcing bar abolishing an end concrete, caused Cage bar is impaired serious, and the tensile strength of reinforcing bar reduces more.
(4) the mud skin that the slurry coat method of bored concrete pile is produced reduces the frictional resistance of pile body, so as to reduce the carrying of pile foundation Power;
(5) discharge of mud causes the destruction of environment.
Cast-in-situ bored pile is nearby deep-etching region in underground, especially dry and wet interface, when concrete pile body it is not close When in fact, there is crack, the corrosion of reinforcing bar will necessarily be caused, so as to have impact on the durability of pile foundation.For uplift pile especially will be wanted The width of control critical eigenvalue, then need to greatly improve its ratio of reinforcement, necessarily causes greatly improving for construction costs, that is to say, that drilling The construction costs of bored concrete pile will be greatly improved.
For pile for prestressed pipe and square pile, although construction costs is relatively low, but there are problems that as follows:
(1) endurance issues of piling, steel end plate itself departs from the corrosion that generation gap causes internal cage bar with concrete.
(2) jointing weldquality is unreliable between stake, steel plate connector corrosion.
(3) stake end and cushion cap and base plate etc. are connected by filling that core is connected or end plate welding quality, exposing for steel beam column cause Connector corrodes.
(4) static pressure or hammer piling process, the casting of precast pile is extruded the life of ground local products, cause periphery pipeline, Structure foundation is damaged or ftractures, and causes higher engineering to be lost.
(5) damage of the pile driving process to piling --- hammering or static pressure produces damage to the concrete of piling, makes the impaired product of pile body Raw crack.
Based on common at present prefabricated pile and the problems of cast-in-situ bored pile or rotary digging bored concrete pile, engineering circles are badly in need of will A kind of new uplift pile is researched and developed, enough bearing capacities can be provided, pile body durability and service life can be solved the problems, such as again.
Stiff composite pile, used as a kind of new pile-type, its structure is as shown in Figure 1 a, 1 b.He be a kind of cement earth pile X1 with The assembly of prefabricated pile X2, overcomes some problems existing for common prefabricated pile, but is finding there is following lacking using process Fall into:
(1) cement mixing method formed in weak soil, its pile strength is relatively low, and typically only 0.2MPa causes this The bearing capacity of composite pile is relatively low, does not play the compound action with prefabricated pile;
(2) smooth in appearance of precast pile, it is relatively low with the cohesive force of cement mixing method, occur shelling in loading process Phenomenon, the bearing capacity of composite pile is relatively low and with uncertainty;
(3) it is connected with cushion cap or base plate to realize composite pile, frequently with the connection of core method is filled, the endoporus of pile tube is sealed in construction Close and do not allow backfilling cement soil, cause soil compaction phenomenon occur in pile driving process, cause the environmental damage of periphery;
(4) joint of prefabricated pile is still using welding, and welding quality is unreliable;The welding procedure time is long, causes Site Soil cement initial set after again be prefabricated stake destruction, make the second-rate of cement soil pile;
(5) pile center hole closing in prefabricated pile pile driving process, the mud or soil cement amount of discharge is larger, causes environment dirty Dye.
(6) isodiametric Soil-cement pile body so that the horizontal bearing capacity of this composite pile is relatively low, in excavation of foundation pit mistake Often occur prefabricated pile in journey and glance off damage phenomenon.
For above-mentioned various problems, a kind of stiff composite pile of abnormity of our utility models is substantially overcomed at present Deficiency existing for all kinds of pile foundations.
Utility model content
Technical problem to be solved in the utility model is that the technical barrier and structure for overcoming existing pile foundation presence lacks Fall into, there is provided a kind of compressive pile of high-bearing capacity and uplift pile, its ultimate principle is as follows:
When the inner core of stiff composite pile adopts the common prefabricated pile of equal diameter smooth surface, due to the receipts of outer core cement-soil Compression deformation is larger and amount of contraction of inner core prefabricated pile is minimum, will appear from gap and connects between outer core cement-soil and stake inner core prefabricated pile Tactile defective tightness, and elapse inner core over time, crack can increase between outer core, cause the load that inner core prefabricated pile bears can not There is hidden danger in effectively outwards core cement-soil stake transmission, common stiff composite pile quality.The shaped pile in longitudinal unequal-side section, in it The male and fomale(M&F) of core prefabricated pile can be segmented the shearing force for undertaking each section of pile body and cement earth pile, enhance pile body frictional force, it is to avoid Occurs the problem that shaft load can not be transmitted effectively behind crack between inner core, outer core.
To reach above-mentioned purpose, the technical solution adopted in the utility model is:
A kind of stiff composite pile of abnormity, including cement or firming agent mixing pile, and prefabricated pile, is characterized in that, prefabricated pile Body surface face is in concave-convex type;Prefabricated pile merogenesis is constituted;The upper, middle and lower of cement or firming agent mixing pile is in different-diameter; It is mechanically connected using screw lock formula between prefabricated pile section, between stake termination contacting surface high-strength resin bonding is adopted.
Prefabricated pile section is in hollow circular or rectangle.
Prefabricated pile section is in hollow circular or rectangle.
Prefabricated pile section is T-shaped.
The top of cement or firming agent mixing pile is major diameter.
Cement or firming agent mixing pile bottom are major diameter.
It is more than unconfined compressive strength 1000KPa of cement or firming agent mixing pile in sludge soft.
Prefabricated pile is compound with cement or firming agent mixing pile as core stake, the length of the core stake in wait core, long core or Short core distribution;Core stake surface with ground directly contact is smooth.
Prefabricated pile is processed in the protection of concrete and high-strength resin without steel end plate, the reinforcing bar and connector of core stake;In advance Pile body processed is in cement or filling and the parcel of firming agent mixing pile.
Prefabricated pile section connection is the docking one by one of stress cage bar, and in the joint of uplift pile dowel is increased.
The outer surface of prefabricated pile is concavo-convex in abnormity.
Scheme of the present utility model, improves the cohesive force between inner core prefabricated pile and cement or firming agent mixing pile and rubs Wipe power;
The cement of outer core or the upper, middle and lower of firming agent mixing pile is set to be in different-diameter.Cement or firming agent are stirred The top diameter for mixing stake is big, for the weak soil reinforced at the top of pile foundation, the horizontal bearing capacity of pile foundation is improve, in being easy to digging process Protection to pile foundation;The base diameter of cement or firming agent mixing pile is big, for the Rock And Soil of reinforcing pile basilar parts, improves stake The bottom bearing of base;
Using soft soil curing agent, reach the unconfined compressive strength of cement or firming agent stirring pile body in sludge soft More than 1000KPa;
It is mechanically connected using screw lock formula between prefabricated pile section, between stake termination contacting surface high-strength resin bonding is adopted.
For the distribution of strata requirement different with bearing capacity, using prefabricated pile as core stake, with cement-based solidified native churning The compound tense of mixing pile, the length of its core stake is in wait the distribution of core, long core or short core.
A steel end plate is eliminated, the principal rod and connector for making prefabricated pile is among the protection of concrete, is allowed to It is difficult corrosion.
In the most filling and parcel in cement or firming agent mixing pile of the endoporus of Prefabricated hollow pile body, appearance, make With higher durability;
To improve the bonding strength of joint of precast piles, by the docking one by one of the stress cage bar of prefabricated pile, and in uplift pile Joint increased dowel.
The material of prefabricated pile is armored concrete or shaped steel
By above technical scheme, the composite pile foundation of manufacture will obtain higher bearing capacity of pile foundation and durability.
Description of the drawings
With reference to the accompanying drawings and detailed description describing this utility model in detail;
Fig. 1 a are stiff composite pile structural representation in prior art.
Fig. 1 b are stiff composite pile cross section structure schematic diagram in prior art.
Fig. 1 is a kind of stiff composite pile structural representation for waiting core special-shaped described in the utility model.
Fig. 2 is a kind of stiff composite pile structural representation of long core abnormity described in the utility model.
Fig. 3 is a kind of stiff composite pile structural representation of short core abnormity described in the utility model.
Fig. 4 is a kind of stiff composite pile structural representation of the expanding abnormity in top described in the utility model.
Fig. 5 is a kind of stiff composite pile structural representation of the expanding abnormity in bottom described in the utility model.
Fig. 6 is a kind of stiff composite pile structural representation of the expanding abnormity in two end described in the utility model.
Fig. 7 is a kind of stiff composite pile structure section figure of reducing abnormity described in the utility model.
Fig. 8 is a kind of stiff composite pile structure section figure of isometrical abnormity described in the utility model.
Fig. 9 is that a kind of inner core described in the utility model is the special-shaped stiff composite pile structure section figure of square pile.
Figure 10 is that a kind of inner core described in the utility model is the special-shaped stiff composite pile structure section figure of hollow square pile.
Figure 11 is that a kind of inner core described in the utility model is the special-shaped stiff composite pile structure section figure of rectangular pile.
Figure 12 is that a kind of inner core described in the utility model is the special-shaped stiff composite pile structure section figure of T-shaped stake.
Figure 13 be a kind of outer section described in the utility model be square inner core be open circles stake stiffness abnormity stiffness answer Close pilework sectional drawing
Figure 14 be a kind of outer section described in the utility model be square inner core be hollow square pile stiffness abnormity stiffness answer Close pilework sectional drawing
Figure 15 is that a kind of outer section described in the utility model is square inner core for the stiffness abnormity stiff composite pile of T-shaped stake Structure section figure
Figure 16 is a kind of joint connection diagram of the stiff composite pile of abnormity described in the utility model.
Diagram:1--- cement or firming agent mixing pile;2--- prefabricated shaped pile;21--- prefabricated equal-diameter pile;3--- The convex surface of precast pile;4--- prefabricated square pile;5-prefabricated hollow square pile;The stake of 6-prefabricated rectangle;The prefabricated T-shaped stakes of 61--- The joint seam of 7-high-strength resin bonding;8-high tensile reinforcement;9-connecting socket;10--- joint screw lock connectors;11--- is expanding Cement or firming agent mixing pile.
Specific embodiment
In order that technological means, creation characteristic, reached purpose and effect that this utility model is realized are easy to understand, under Face combines and is specifically illustrating, and this utility model is expanded on further.
Referring to Fig. 1, Fig. 2, Fig. 3, special-shaped stiff composite pile structure in the present embodiment, substep is applied and completed, both can be Apply in more hard rock-soil layer, also can apply in weak soil layer such as muck soil, quicksand and slity soil;First use churning Stirring technique, mixes the mixing of cement based soil body firming agent, applies and completes cement-based solidified native jet mixing pile body 1;Then it is concentric The precast reinforced concrete pile 2 of implantation abnormity;The convex surface 3 of precast reinforced concrete pile body is engaged in one with rotation stirring pile body 1 Rise, increased the adhesive surface of composite pile, improve its bonding force.
Spreading prefabricated pile is mechanically connected using screw lock formula and reaches design length, and be implanted in place, the composite pile is certain in maintenance Higher bearing capacity can be obtained after time.Referring to Figure 16, at the pile joint seam 7 of high-strength resin bonding, prefabricated pile end High tensile reinforcement 8, is connected by joint screw lock connector 10, and inside joint screw lock connector connecting socket 9 is provided with.
Example one:Deng the stiff composite pile of core abnormity
The inner core stake of this kind of composite pile and to wrap up in stake outward be equal length, in being generally used for the more uniform ground of the soil body.In week Surrounding environment is more complicated, the region with the viscosity soil body as ground, when effect of driving pile affects more serious to surrounding enviroment, commonly uses this Plant pile-type.Herein referring to Fig. 1.
Example two:The stiff composite pile of long core abnormity
The inner core pile length of this kind of composite pile is more than wrapping up in outward stake, and it is softer and based on cohesive soil to be generally used for upper soil horizon, Bottom soil layer is harder and ground based on sandy soil in.When the requirement for bearing capacity of pile foundation it is not high, and when tighter to Deformation control, When need to use longer prefabricated pile control settlement, this pile-type is commonly used;It is mainly used as compressive pile.It is prefabricated with Rock And Soil directly contact Stake adopts equal diameter reinforced concrete pile 21, disturbance of the bottom pile driving process to the soil body is reduced, beneficial to soil body frictional resistance after pile sinking The recovery of power.Herein referring to Fig. 2.
Example three;The stiff composite pile of short core abnormity
The inner core pile length of this kind of composite pile wraps up in stake outside being shorter than, in being generally used for the more uniform ground of the soil body.In peripheral ring Border is more complicated, the region with viscosity or the mud soil body as ground, when effect of driving pile affects more serious to surrounding enviroment, and When not tight to the settlement request of pile foundation, the pile-type is commonly used.Herein referring to Fig. 3.
Example four:The stiff composite pile of the expanding abnormity in top
The outer diameter lower part for wrapping up in stake on top of this kind of composite pile is larger, is mainly used in excavating thin-skinned soil base Reinforce, to improve the horizontal bearing capacity on pile foundation top.It is to protect the engineering pile constructed when the excavation pit in mud, Using this kind of pile-type, you can ensure that precast reinforced concrete pile does not occur the accidents such as sidesway, broken pile.Herein referring to Fig. 4.
Example five:The stiff composite pile structure of the expanding abnormity in bottom
The outer diameter for wrapping up in stake in bottom of this kind of composite pile is larger compared with top, is mainly used in the reinforcing to pile-end soil body, To improve pile foundation bottom bearing.When stake end is located at compared with Soft Soil Layer or detrition region, the bottom bearing provided by pile-end soil is less, In order to not increase the length of core stake, using this kind of pile-type, you can improve the bearing capacity of composite pile.Herein referring to Fig. 5.
Example six:The stiff composite pile structure of the expanding abnormity in two ends
Referring to Fig. 6, to wrap up in stake larger in upper and lower diameter for this kind of composite pile outer, and mid diameter is less, mainly For the reinforcing to excavating thin-skinned soil base and pile-end soil body, can not only improve the horizontal bearing capacity on pile foundation top but also base can be improved Bottom bearing.The stiff composite pile (referring to Fig. 7) of isometrical abnormity.Stiff composite pile (the ginseng of isometrical abnormity can certainly be designed as See Fig. 8).
Example seven:Inner core is the stiff composite pile of square pile abnormity
The inner core of this kind of composite pile is square pile, is mainly used in the region of not only pressure-bearing but also resistance to plucking.It is more complicated in surrounding enviroment, with Viscosity or the mud soil body are the region of ground, when effect of driving pile affects more serious to surrounding enviroment, both may be used using the pile-type Soil compaction effect is eliminated, and higher bearing capacity can be provided.The square pile of heart is solid or hollow square pile.Fig. 9 inner cores are solid square 4 schematic diagrams of stake;It is the schematic diagram of hollow square pile 5 that Figure 10 is inner core.
Example eight:Inner core is the stiff composite pile of rectangular pile abnormity
The inner core of this kind of composite pile is rectangular pile 6 or T-shaped stake 61, is mainly used as bearing along long side direction effect higher level The pile foundation of load.In high-rise building, it is desirable to provide very high horizontal bearing capacity, while surrounding enviroment are more complicated, sink When stake soil compaction effect affects again very serious to surrounding enviroment, soil compaction effect can both be eliminated using the pile-type, and can be provided higher Horizontal bearing capacity.Herein referring to Figure 11 and Figure 12.
Example nine:Outer section is that square inner core is the special-shaped stiff composite pile of hollow rectangle stake
The inner core of this kind of composite pile is hollow circular stake, rectangular pile or T-shaped stake, and stake is wrapped up in outward using multiaxis rotating spraying mixture pile machine Formed and intend square jet mixing pile body, reduce the outer sectional area for wrapping up in stake, may be inserted into the circular stake compared with big cross section or rectangular pile, There is provided larger friction area and higher withdrawal resistance, anti-floating pile foundation is commonly used for.Inner core is hollow circular stake referring to Figure 13, interior Core is hollow rectangle stake referring to Figure 14, and inner core is T-shaped stake referring to Figure 15.
Ultimate principle of the present utility model, principal character and advantage of the present utility model has been shown and described above.One's own profession The technical staff of industry it should be appreciated that this utility model is not restricted to the described embodiments, described in above-described embodiment and description Simply illustrate principle of the present utility model, this utility model can also on the premise of without departing from this utility model spirit and scope There are various changes and modifications, these changes and improvements are both fallen within the range of claimed this utility model.This utility model will Protection domain is asked to be defined by appending claims and its equivalent.

Claims (10)

1. a kind of stiff composite pile of abnormity, including cement or firming agent mixing pile and precast reinforced concrete pile or piling bar, its It is characterized in that, prefabricated pile body surface is in concave-convex type;Prefabricated pile merogenesis is constituted;The top of cement or firming agent mixing pile, middle part and under Portion is in different-diameter;It is mechanically connected using screw lock formula between prefabricated pile section, between stake termination contacting surface high-strength resin bonding is adopted.
2. a kind of stiff composite pile of abnormity according to claim 1, is characterized in that:Prefabricated pile section is in hollow circle Or it is square.
3. a kind of stiff composite pile of abnormity according to claim 1, is characterized in that:Prefabricated pile section in solid round or It is square.
4. a kind of stiff composite pile of abnormity according to claim 1, is characterized in that:Prefabricated pile section is T-shaped.
5. a kind of stiff composite pile of abnormity according to claim 1, is characterized in that:The top of cement or firming agent mixing pile Portion is major diameter.
6. a kind of stiff composite pile of abnormity according to claim 1, is characterized in that:The bottom of cement or firming agent mixing pile Portion is major diameter.
7. a kind of stiff composite pile of abnormity according to claim 1, is characterized in that:Cement or firming agent mixing pile are becoming silted up It is more than unconfined compressive strength 1000KPa in mud weak soil.
8. a kind of stiff composite pile of abnormity according to claim 1, is characterized in that:Prefabricated pile as core stake, with cement Or firming agent mixing pile is compound, the length of the core stake is in wait the distribution of core, long core or short core;With the core stake of ground directly contact Surface is smooth.
9. a kind of stiff composite pile of abnormity according to claim 1, is characterized in that:Prefabricated pile is without steel end plate, core stake Reinforcing bar and connector process in the protection of concrete and high-strength resin;Prefabricated high-strength pile body is stirred in cement or firming agent The filling of stake and parcel.
10. a kind of stiff composite pile of abnormity according to claim 1, is characterized in that:Prefabricated pile section connection is to be advocated The docking one by one of muscle, in the joint of uplift pile dowel is increased.
CN201621132653.6U 2016-10-18 2016-10-18 Strength nature composite pile of dysmorphism Active CN206090547U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106284329A (en) * 2016-10-18 2017-01-04 上海强劲地基工程股份有限公司 A kind of stiff composite pile of abnormity
CN111705830A (en) * 2020-05-29 2020-09-25 中和华丰建设有限责任公司 Pile foundation and construction method thereof
CN112726582A (en) * 2021-01-08 2021-04-30 中国建筑第二工程局有限公司 PHC cement soil mixing composite pile construction process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106284329A (en) * 2016-10-18 2017-01-04 上海强劲地基工程股份有限公司 A kind of stiff composite pile of abnormity
CN111705830A (en) * 2020-05-29 2020-09-25 中和华丰建设有限责任公司 Pile foundation and construction method thereof
CN112726582A (en) * 2021-01-08 2021-04-30 中国建筑第二工程局有限公司 PHC cement soil mixing composite pile construction process

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