CN203834486U - Rear reinforcement support pile structure - Google Patents
Rear reinforcement support pile structure Download PDFInfo
- Publication number
- CN203834486U CN203834486U CN201320591500.8U CN201320591500U CN203834486U CN 203834486 U CN203834486 U CN 203834486U CN 201320591500 U CN201320591500 U CN 201320591500U CN 203834486 U CN203834486 U CN 203834486U
- Authority
- CN
- China
- Prior art keywords
- pile
- piles
- foundation ditch
- bodies
- foundation pit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
The utility model relates to a rear reinforcement support pile structure. The rear reinforcement support pile structure is characterized by mainly comprising cast-in-situ bored piles, foundation pit back side grouting bodies, foundation pit internal grouting bodies, cement soil piles and pile core reinforcement bodies. The cast-in-situ bored piles are meshed with the cement soil piles, and when the cast-in-situ bored piles are used as maintenance piles, stiffening plates are welded to steel reinforcement cages in pile bodies with the large design bending moment. The foundation pit back side grouting bodies are located in foundation pit back side soil, and are arranged behind the cast-in-situ bored piles respectively, and the foundation pit internal grouting bodies are symmetrically arranged in foundation pit internal backfill soil. Reserved holes in the centers of the cement soil piles are filled with the pile core reinforcement bodies, and are formed by grouting inserting cores or cast-in-place reinforced concrete. The rear reinforcement support pile structure can be applied to the foundation pit composite supporting project of maintenance piles and project piles, the strength loss of the pile bodies in the stage of being used as the maintenance piles is remedied through multiple rear reinforcement measures, the strength of the pile bodies is guaranteed when the pile bodies are used as the project piles, and high technical economy benefits are achieved.
Description
Technical field
The utility model relate to a kind of after reinforce support pilework, belong to base pit engineering field, be applicable to the maintaining pile foundation ditch composite support engineering of engineering pile of holding concurrently.
Background technology
Along with greatly developing of domestic infrastructure, highrise building project is growing, and highrise building is all provided with basement or air raid shelter conventionally, and pile foundation and deep foundation ditch, as the important composition of building foundation, are widely used in building engineering field.Along with building in city proper is intensive gradually, especially, in Reconstruction Project, there is the situation that new and old building thing adjoins to occur, often in foundation pit construction process, slope difficulty is put in place, often need to use campshed supporting.
The Foundation Pit that campshed supporting is commonly used as base pit engineering, it accounts for larger specific gravity in the investment cost of building excavations and foundations, and as a kind of temporary works, its investment cost is large, the effectiveness time is of short duration, has caused huge waste.To safeguard campshed in excavation of foundation pit as outside enclosed structure, also as building engineering pile load superstructure load, simultaneously also as the part of outer wall of basement lateral pressure resistant power structural system, can save in a large number underground construction investment, change traditional Protection Engineering of Foundation Pit by means of Ground Penetrating only as temporary works, the way that after basement construction completes, enclosed structure is just scrapped, has higher technical economic benefit.
But, soldier pile is when as enclosed structure, pile body mainly bears foundation ditch periphery soil body soil pressure, pile body is to be subject to curved and to be cut as main, the fine and closely woven crack of the inner easily generation of pile body, there is micro-destruction in indivedual positions, affects pile body load-carrying properties, likely do not reach design strength requirement in the later stage during as engineering pile, have hidden dangers in project.
In sum, cast-in-place soldier pile is designed to the maintaining pile composite support mode of engineering pile of holding concurrently, when excavation of foundation pit, foundation ditch is played to maintenance effect; After foundation ditch internal construction has been constructed, then as the cushion cap foundation engineering pile of superstructure, realize dual-purpose, can to save a soldier pile cost, improved engineering construction efficiency simultaneously.But as can not effectively solve the micro-destruction of pile body that pile body produces in maintenance process, be there is to certain risk in later stage engineering, be to ensure workmanship, safety, should carry out pile body pretreatment and consolidation process again.
Given this,, for solving degradation problem under the pile quality producing in multiplex use procedure in stake early stage, need at present that a kind of bending resistance in early stage of invention, anti-minute crack ability are outstanding badly, the later stage can grouting and reinforcing pile body and enclosed structure before and after the rear reinforce support pilework of the soil body.
Summary of the invention
The purpose of this utility model is to provide a kind of rear reinforce support pilework of pasting enclosed structure grouting and reinforcing, the reinforcing of cement earth pile stake core employing Reinforced Concrete Materials in stiffener, the foundation ditch dorsal part soil body and in foundation ditch in the backfill soil body that is welded with in reinforcing cage in the larger moment of flexure scope pile body of bored pile design.
For realizing above-mentioned technical purpose, the utility model has adopted following technical scheme:
Reinforce support pilework after a kind of, is characterized in that described structure mainly comprises injecting cement paste in bored pile, foundation ditch dorsal part injecting cement paste, foundation ditch, cement earth pile, stake core intensive aspect; Bored pile and the interlock of cement earth pile phase, be welded with stiffener on reinforcing cage in design moment larger part pile body when wherein bored pile uses as maintaining pile; Foundation ditch dorsal part injecting cement paste is positioned at the foundation ditch dorsal part soil body, establishes together after every place bored pile, is provided with symmetrically injecting cement paste in foundation ditch in foundation ditch in backfill; Stake core intensive aspect fills in the preformed hole of each cement earth pile center, forms by slip casting lock pin or cast-in-situ steel reinforced concrete.
Stiffener is the steel plate of thick 20mm, wide 200mm, high 1500mm, and the even vertical welding of hoop is in reinforcing cage inner side.
Described stake core intensive aspect is pre-formed core, in core body pressing-in grouting preformed hole, punctures cement earth pile, inserts in the soil body of bottom.
Stake core intensive aspect is cast-in-situ steel reinforced concrete, and preformed hole suitably bores to dig deepens to be also placed with reinforcing cage therein.
In described foundation ditch dorsal part injecting cement paste, foundation ditch injecting cement paste and stake core reinforcing body all after pit backfill, maintaining pile constructed before engineering pile transition.
the utlity model has following feature and beneficial effect:
(1) the utility model relates to structure and can be used as the maintaining pile dual-purpose type supporting and protection structure of engineering pile of holding concurrently, and when foundation trench excavation, the foundation ditch dorsal part soil body is played to maintenance effect; After foundation trench internal construction has been constructed, then as the cushion cap foundation engineering pile of outboard structure, realize dual-purpose, can to save a soldier pile cost, reduced construction investment, improved engineering construction efficiency simultaneously.
(2) in design moment larger part pile body, on reinforcing cage, be welded with stiffener, improve local bending resistance, the shear resistance of bored pile, can reduce the minute crack that pile body produces when as maintaining pile.
(3) before and after enclosed structure, side arranges Grouting Pipe or injected hole, not only can fill up pile body minute crack, and can strengthen surrounding soil after high-pressure slip-casting, and the supporting capacity while improving pile body as engineering pile, reduces structure sediment; At cement earth pile stake core reserving hole, and adopt reinforced concrete stiff-core to reinforce in the later stage, the core body relative bearing stratum of suitably coming in and going out, has the effect that improves engineering pile supporting capacity equally.
(4) two kinds of preformed holes of the present utility model all adopt water filling pouch as interim resistance to compression obturator, later stage can directly be carried out slip casting or core body construction after discharging water and reclaiming pouch, gain quick return for pouch, can reuse, the method construction preformed hole, speed of fulfiling hole is very fast, the quality of boxing out is good, construction cost is lower, and operation is simple.
Brief description of the drawings
Fig. 1 is reinforce support pilework schematic cross-sectional view after the utility model one;
Fig. 2 is water filling pouch and Grouting Pipe layout schematic diagram before the utility model reinforcement;
Fig. 3 is that on the interior reinforcing cage of bored pile, stiffener is arranged schematic diagram;
In figure: injecting cement paste, 4-cement earth pile, 5-stake core intensive aspect, the outer water filling pouch of 6-foundation ditch, the interior Grouting Pipe of 7-backfill, 8-stake core water filling pouch, the 9-foundation ditch dorsal part soil body, the interior backfill of 10-foundation ditch, the main muscle of 11-, 12-stiffener, 13-stirrup in 1-bored pile, 2-foundation ditch dorsal part injecting cement paste, 3-foundation ditch.
Detailed description of the invention
Cement earth pile and drill-pouring construction technology, reinforcing cage colligation, foundation ditch dorsal part preformed hole are drilled with construction technical requirement, in the present embodiment such as grouting serous fluid proportioning, do not state tired, and emphasis is set forth the embodiment that the utility model relates to structure.
Fig. 1 is reinforce support pilework schematic cross-sectional view after the utility model one; Fig. 2 is water filling pouch and Grouting Pipe layout schematic diagram before the utility model reinforcement; Fig. 3 is that on the interior reinforcing cage of bored pile, stiffener is arranged schematic diagram.Shown in Fig. 1 ~ 3, a kind of rear reinforce support pilework mainly comprises: injecting cement paste 3, cement earth pile 4, stake core intensive aspect 5 and stiffener 12 in bored pile 1, foundation ditch dorsal part injecting cement paste 2, foundation ditch.
The hold concurrently composite support base pit engineering of engineering pile of maintaining pile, main body enclosed structure is made up of bored pile 1 and cement earth pile 4.Intended diameter 800mm bored pile 1 is maintaining pile type, the stake heart is apart from 1200mm, reinforcing cage external diameter 680mm, wherein main muscle 11 adopts the HRB345 indented bars of diameter 18mm, and stirrup 13 is the HPB300 light circle muscle of diameter 6mm, 3 stiffeners 12 of hoop uniform welding on reinforcing cage in as maintaining pile operational phase design moment larger part pile body, the every thick 20mm of stiffener 12, wide 200mm, high 1500mm, adopts the steel plate cutting of HRB345 to form.Cement earth pile 4, as sealing, stirs diameter 800mm, and the stake heart is apart from 1200mm, with bored pile 4 phase interlocks.
Behind the location, stake position of cement earth pile 4 and bored pile 1, the foundation ditch dorsal part soil body 9 in, the rear 15mm of bored pile 1 place, adopt small-sized drill to be drilled with diameter 100mm duct, the duct degree of depth is to design foundation ditch bottom surface absolute altitude 3000mm once.After pore-forming, fill in immediately diameter 800mm rubber pouch (slightly expanding after water filling), after the water filling of pouch inner high voltage, tighten sack, form the outer water filling pouch 6 of foundation ditch.
After all the outer water filling pouch 6 of foundation ditch has been arranged, carrying out cement earth pile 4 constructs, single pile cement-soil is not before initial set, fill in diameter 200mm rubber pouch (slightly expanding after water filling) in stake core position, can deliver within the scope of pile body compared with hardpan depth by steel pipe, high pressure water injection after port closed, finally tightens sack, forms stake core water filling pouch 8.
Reach after some strength until cement earth pile 4, carry out bored pile 1 and construct, cement earth pile 4 and bored pile 1 construction technology all meet the standard of country and local relevant industries specification.In cement earth pile 4 and bored pile 4 work progresss, machinery must be avoided the outer water filling pouch 6 of foundation ditch, prevents its breakage.
In foundation ditch, in work progress, regularly detect water filling pouch, free flat situation occurs, moisturizing immediately or replacing.
After foundation ditch internal construction has been constructed, pit backfill, built-in slip casting pipe 7 in backfill 10 in foundation ditch before each bored pile.After backfill completes, to the slip casting of backfill inner high voltage, form injecting cement paste 3 in foundation ditch by Grouting Pipe 7.Meanwhile, the outer water filling pouch 6 of foundation ditch and a stake core water filling pouch 8 discharge water, and pouch is shunk and taken out, and insert high-pressure slip-casting after Grouting Pipe backfill medium coarse sand, formation foundation ditch dorsal part injecting cement paste 2 outside foundation ditch in preformed hole; After being suitably in the milk, insert diameter 200mm precast reinforced concrete pile as stake core in the interior preformed hole of cement earth pile 4, form a stake core intensive aspect 5, stake core punctures cement earth pile 4, enters the relative hardpan 500mm in bottom.
Until the periphery slurries of injecting cement paste 3 in foundation ditch dorsal part injecting cement paste 2, foundation ditch, stake core intensive aspect 5, reach design strength 80% after, carry out the cushion cap foundation construction of superstructure on can the enclosed structure after reinforcement.
Claims (5)
1. a reinforce support pilework after, is characterized in that described structure mainly comprises injecting cement paste in bored pile, foundation ditch dorsal part injecting cement paste, foundation ditch, cement earth pile, stake core intensive aspect; Bored pile and the interlock of cement earth pile phase, be welded with stiffener on reinforcing cage in design moment larger part pile body when wherein bored pile uses as maintaining pile; Foundation ditch dorsal part injecting cement paste is positioned at the foundation ditch dorsal part soil body, establishes together after every place bored pile, is provided with symmetrically injecting cement paste in foundation ditch in foundation ditch in backfill; Stake core intensive aspect fills in the preformed hole of each cement earth pile center, forms by slip casting lock pin or cast-in-situ steel reinforced concrete.
2. rear reinforce support pilework according to claim 1, is characterized in that described stiffener is the steel plate of thick 20mm, wide 200mm, high 1500mm, and the even vertical welding of hoop is in reinforcing cage inner side.
3. rear reinforce support pilework according to claim 1, is characterized in that described stake core intensive aspect is pre-formed core, in core body pressing-in grouting preformed hole, punctures cement earth pile, inserts in the soil body of bottom.
4. rear reinforce support pilework according to claim 1, is characterized in that described stake core intensive aspect is cast-in-situ steel reinforced concrete, and preformed hole suitably bores to dig deepens to be also placed with reinforcing cage therein.
5. rear reinforce support pilework according to claim 1, it is characterized in that in described foundation ditch dorsal part injecting cement paste, foundation ditch injecting cement paste and stake core reinforcing body all after pit backfill, maintaining pile constructed before engineering pile transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320591500.8U CN203834486U (en) | 2013-09-24 | 2013-09-24 | Rear reinforcement support pile structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320591500.8U CN203834486U (en) | 2013-09-24 | 2013-09-24 | Rear reinforcement support pile structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203834486U true CN203834486U (en) | 2014-09-17 |
Family
ID=51512346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320591500.8U Expired - Lifetime CN203834486U (en) | 2013-09-24 | 2013-09-24 | Rear reinforcement support pile structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203834486U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480947A (en) * | 2014-11-24 | 2015-04-01 | 江西中恒岩土工程技术有限公司 | Construction method of prestress cast-in-place pile and soil cement pile engagement support |
| CN111665130A (en) * | 2020-06-03 | 2020-09-15 | 华侨大学 | Model device of self-expansion pile supporting structure and use method |
-
2013
- 2013-09-24 CN CN201320591500.8U patent/CN203834486U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104480947A (en) * | 2014-11-24 | 2015-04-01 | 江西中恒岩土工程技术有限公司 | Construction method of prestress cast-in-place pile and soil cement pile engagement support |
| CN111665130A (en) * | 2020-06-03 | 2020-09-15 | 华侨大学 | Model device of self-expansion pile supporting structure and use method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106988758A (en) | One kind is used to pass through large-scale vertical solution cavity group method for tunnel construction | |
| CN105544512A (en) | Reinforced sack grouting stone-breaking pile with heat transferring tube buried therein and construction method | |
| CN103321246B (en) | Underground diaphragm wall based foundation pit construction method | |
| CN103184734A (en) | Implanted and grouted compound pile and construction method | |
| CN110080169B (en) | Construction method for building land by enclosing sea based on basement utilization | |
| CN104420486A (en) | Method and structure for adding steel pipe pile at bottom of extended shallow foundation | |
| CN103437348A (en) | Construction device and method of pile peripheral cemented soil cast-in-place stiffness core pile | |
| CN104846809A (en) | Prefabricated tubular pile capable of draining water and increasing frictional resistance and construction method thereof | |
| CN104141304B (en) | The construction method of a kind of extrusion molding preformed pile stiff-core cement soil Y shape stake | |
| CN113373962B (en) | Combined leakage stoppage construction method for deep foundation pit | |
| CN206707721U (en) | A kind of tunnel structure for passing through large-scale vertical solution cavity group | |
| CN202969370U (en) | Novel steel pipe pile | |
| CN206157860U (en) | Drainage pipeline | |
| CN203834486U (en) | Rear reinforcement support pile structure | |
| CN112081158B (en) | Construction method for forming reinforced composite pile foundation by advanced grouting of high-rise building | |
| CN111395353A (en) | Foundation pit supporting device and method based on combination of steel sheet piles and vertical inclined struts | |
| CN111335912A (en) | Large-pipe-diameter mechanical pipe jacking construction process for soft soil foundation in collapsible loess area | |
| CN203684215U (en) | Carbon fiber cloth bag type cast-in-situ anti-arch curved surface combined special-shaped pile | |
| CN104480945A (en) | Inversed construction method for foundation pit | |
| CN103741682B (en) | The construction method of a kind of carbon fiber cloth bag cast-in-place antiarch surface composition shaped pile | |
| CN212642730U (en) | Collapsible loess area tunnel passes people's air defense structure | |
| CN211200425U (en) | High side slope composite supporting construction that fills of gravel soil | |
| CN212270943U (en) | Prefabricated assembled steel concrete combined supporting pile | |
| CN204059343U (en) | The stake of extrusion molding preformed pile stiff-core cement soil Y shape | |
| CN115637689A (en) | Immersed tube reinforcement gravel pile construction method for reinforcing soft foundation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140917 |
|
| CX01 | Expiry of patent term |