CN101597903A - A kind of construction method of cylindrical slurry core pile that is used for pattern foundation pit supporting structure - Google Patents
A kind of construction method of cylindrical slurry core pile that is used for pattern foundation pit supporting structure Download PDFInfo
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- CN101597903A CN101597903A CNA2009100631582A CN200910063158A CN101597903A CN 101597903 A CN101597903 A CN 101597903A CN A2009100631582 A CNA2009100631582 A CN A2009100631582A CN 200910063158 A CN200910063158 A CN 200910063158A CN 101597903 A CN101597903 A CN 101597903A
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Abstract
A kind of cylindrical slurry core stake supporting method that is used for pattern foundation pit supporting structure of the present invention; belong to municipal engineering foundation ditch construction method and facility field; the inventive method is before excavation of foundation pit; according to working design; be provided with at interval by the center along foundation ditch two bodies of wall and preset the cylindrical slurry core stake that on-the-spot sizing material forming body that hollow core and outer wall connect is formed; promptly locate through the stake hole; machinery creeps into the pile hole, core is preset in this hole, location hole perfusion colloidality slurry between core and stake hole; after solidifying, slurry promptly forms single cylindrical slurry core stake with core; by design foundation ditch both sides body of wall finish slurry core stake stake be disbursed from the cost and expenses protect after, excavation pit, construction finishes after the backfill earthwork; extract and preset core in the stake; and with sand backfill stake hole, this method is a kind of simple and easy hollow cylindrical shell stake supporting method at better soil property, adopts mechanical hole building; occupied ground is little; need not the heavy excavation construction, the favorable environment protection, the steel pipe core is reusable; economize on resources, this method has wide range of applications.
Description
Technical field
The present invention is a kind of construction method of cylindrical slurry core pile that is used for pattern foundation pit supporting structure, belongs to the foundation pit support construction technology of municipal engineering and building engineering field.
Background technology
At present, in municipal engineering and architectural engineering pit construction,, normally select different supporting method with engineering geological conditions according to the foundation ditch surrounding enviroment for pipeline and box culvert foundation ditch.When open and engineering geological conditions is better when surrounding enviroment, be to adopt the heavy excavation mode since the long period.But in order to protect environment, protection and reasonable development and the valuable land resources of effective utilization in the rules of urban construction, do not allow to adopt the heavy excavation mode for numerous pipelines and box culvert foundation pit construction.Because municipal pipeline and box culvert foundation ditch, its buried depth reaches more than the 5.0m usually, and its neighboring buildings circumstance complication, even engineering geological conditions allows to adopt the heavy excavation mode to construct, does not in fact also carry out the possibility that the heavy excavation mode is constructed.Therefore, when preceding pipeline during with the box culvert foundation pit construction majority adopted the supporting method of different pile bodies.
Fig. 1 is existing general steel plate pile foundation hole supporting schematic diagram, the foundation ditch width B is generally 3.0m-5.0m, the common 4.0m-7.0m of foundation depth, when engineering geological conditions suits, the topsoil and the subsoil that are foundation ditch are all comparatively weak, when its characteristic value of foundation bearing capacity is no more than 130kPa, generally can adopt the common channel-section steel steel sheet pile of relatively economical and Larsen steel sheet pile outside the foundation ditch wall as soldier pile 1, and employing inner supporting device supporting in foundation ditch, adjacent interior 2 the common 3.0m-5.0m of space D that supports.But, under many circumstances, the topsoil of foundation ditch and subsoil do not belong to weak soil property, its one of both or both when being hard soil property such as old clay, gravelly soil or rock, for environment and security risk reason, can not adopt direct straight trough digging mode construction, and also can't rely on existing method to adopt common channel-section steel steel sheet pile or the supporting of Larsen steel sheet pile with vibration or static pressure machinery mode.Other is as support pattern such as castinplace pile, root pile and SMW worker's method diaphragm wall etc., because engineering cost is high and factors such as relevant co-ordination amount is big also are difficult to employing.
In addition, the applicant also notices some disclosed recently patented method, the patent (patent No.: 00114586.X) propose a kind of continuous wall constructing method including drilling holes and late grouting as Wang Ping, this worker's method is divided into several adjacent successively unit with diaphragm wall, each unit adopts single head or bull rig pore-forming, mud off earlier; From bottom, stake hole the stake hole being injected by mud and cement then is the soil cement slurry of soil-solidified-agent preparation, thereby the mud in the stake hole is cemented out; After finishing, each unit construction promptly forms diaphragm wall with sealing function.This method construction equipment is many, needs comparatively open construction plant, and it is loaded down with trivial details to construct, long construction period, and construction costs height, therefore inapplicable municipal pipeline and box culvert pattern foundation pit supporting structure.
For this reason, for soil layer, seek a kind ofly to implement conveniently, safe and reliable, economical and practical foundation pit supporting method, become the major issue of paying close attention in the industry with comparatively hard geological conditions.
Summary of the invention
The purpose of this invention is to provide a kind of slurry core pile construction method that is used for pattern foundation pit supporting structure makes at municipal pipeline and box culvert foundation pit construction, avoid direct straight trough heavy excavation, simple and easy cylindrical shell stake supporting method at hard soil property enforcement, and it is convenient, safe and reliable, economical and practical that this method is implemented, and has wide range of applications.
The objective of the invention is to be achieved through the following technical solutions:
The present invention is used for the slurry core stake supporting method of excavation of foundation pit construction, be according to the pile body height of working design and density is set, before excavation of foundation pit, by the cylindrical slurry core stake of being preset the specified altitude that on-the-spot sizing material forming body that hollow core and outer wall thereof connect forms by the center is set at interval at foundation ditch both sides body of wall, form cylindrical slurry core stake soldier pile row 3 in the both walls for the treatment of construction foundation pit in advance, as shown in Figure 2, and after the foundation ditch interior construction is finished, extract the hollow core that presets this slurry core stake inside and a kind of foundation pit supporting method in backfill stake hole.
Implementing this method comprises the steps:
One, according to the distribution design of pattern foundation pit supporting structure pile body, locate in the stake hole in advance;
Two,,, adopt to be suitable for rig or other machinery, drilled dry or sleeve pipe retaining wall pore-forming according to soil condition at place, pile body location;
Three,, the hollow core of circular cross-section or square-section is preset in the above-mentioned stake hole with locator location;
Four, the hole between hollow core outer wall 4 and stake hole inwall 5 adopts cement paste or other colloidality slurry 6 to fill, and promptly forms single cylindrical slurry core stake with core after slurry solidifies, as shown in Figure 3;
Five,, carry out foundation ditch and excavate construction and the construction of corresponding interior support facility thereof by designing after cylindrical slurry core stake supporting is finished in the foundation ditch both sides;
Six, after foundation pit construction finishes and finishes backfilling of earthwork, extract the hollow core that presets in this slurry core stake;
Seven,, and recover ground with sand backfill stake hole.
The job practices that the present invention starches the core stake is different from existing castinplace pile and other job practices mainly shows as 2 points.
First: its final supporting pile body that forms of existing castinplace pile and other job practices is generally solid pile, for solid pile, its center material does not generally participate in stressed or very little to stressed contribution, so solid pile has been wasted the material and the engineering time of pile body center range; And starch the core stake owing to be provided with hollow core, therefore the function of the material that uses can access and fully play, and has saved the pile body center range support system is contributed materials with smaller.This point is and does operation castinplace pile, wet trade castinplace pile, miniature boundling steel pipe pile and the continuous wall constructing method including drilling holes and late grouting (patent No.: one of main difference of construction technology such as 00114586.X).
Second: its final supporting pile body that forms of existing castinplace pile and other job practices is generally temporary supporting, promptly after the construction of building such as pipeline, box culvert finishes, these pile bodies are not generally playing a role, can not extract repeated use yet rigid materials such as the reinforcing bar in these supporting pile bodies, steel pipe owing to mixes with cementing properties materials such as concrete, cement pastes bond together, so waste rigid materials such as reinforcing bar, steel pipe.And the stake of slurry core can be extracted hollow cores such as steel pipe, steel concrete tubing in the later stage, and therefore the rigid material that uses can be reused.This point is and two of the main difference of doing construction technologies such as operation castinplace pile, wet trade castinplace pile, miniature boundling steel pipe pile.
It is a kind of innovation piling method that surmounts prior art that the present invention starches core stake supporting method, and technology is simple and direct, and easy construction after foundation pit construction is finished, takes out that to preset core reusable, economize on resources, construction costs is low, and broad range of applicability, practical.Following two aspects of concrete manifestation:
One, the present invention starches core pile construction method and the comparison of existing associated construction method, has following outstanding feature:
(1) implements the present invention and starch the core stake, its hollow core inner chamber then needn't filling concrete slurry or other colloidality slurry, only cement injection slurry or other colloidality slurry in the hole between core outer wall and stake hole inwall, real is a kind of hollow cylindrical shell stake, compare with existing solid cylinder stake, technology is simple, the operating personnel is few, the saving of labor, save time, material-saving;
(2) can adopt the rig pore-forming, the construction equipment that needs is few, and equipment occupation space is little, and it is flexible relatively to construct;
(3) do not need the heavy excavation construction, less demanding to operating environment, and little to the surrounding enviroment influence, help environmental protection;
(4) preset hollow core such as steel pipe, steel concrete tubing etc. as what supporting was used, can reuse, economize on resources;
Two, because the inherent characteristics of this slurry core pile construction method, so in foundation pit construction, be widely used:
(1) be used for the pipeline foundation ditch:
Good and can not put the slope and must carry out under the situation of straight trough excavation in engineering geological conditions, the cylindrical slurry core stake has the ample scope for abilities; Its construction costs is close with the Larsen steel sheet pile, but because that it adopts is mechanical little, it is comparatively flexible to construct, and its interference to surrounding enviroment is significantly less than the Larsen steel sheet pile, so has application prospect.
(2) be used for box culvert foundation ditch, pumping plant foundation ditch, passage foundation ditch:
The situation doffing somaplasm core stake good in engineering geological conditions can replace castinplace pile and miniature boundling steel pipe pile etc.; General in engineering geological conditions, to sealing under the less demanding situation, the stake of tubular slurry core can replace SMW worker's method diaphragm wall and drill-grouted diaphragm wall etc.
Description of drawings
Fig. 1 is existing steel sheet pile foundation ditch supporting schematic diagram
Fig. 2 is a cylindrical slurry core pile foundation hole supporting schematic diagram of the present invention
Fig. 3 is a cylindrical slurry core stake schematic diagram of the present invention
The specific embodiment
How now further specify the present invention in conjunction with the accompanying drawings implements:
Example 1 old cohesive soil pipeline foundation pit construction operation, cylindrical slurry core stake stake position center distance 500mm, foundation depth 6.0m, cylindrical slurry core stake height 9.0m.
1) ground and underground obstacle are got rid of in the leveling place, location, stake hole, pile-forming machine perching;
2) for old cohesive soil, adopt the drilled dry mode to hole, bore dia is generally 250mm;
3) hole depth reaches design height, if in the hole water is arranged, pump drainage hole Zhong Shui, the soil body that cements out place beyond the 3.0m of limit, aperture;
4) the steel pipe core that utilizes backhoe or rig will descend the end closure diameter to be generally 210mm-230mm is inserted in the boring, utilizes the locator location;
5) hole between steel pipe core 4 and the hole wall 5 injects cement slurry, and slip casting finishes and is solidified as sizing material forming body 6, promptly forms single cylindrical slurry core stake pile body by steel pipe hollow core 4 and sizing material forming body 6;
6), equidistantly build up the cylindrical slurry core stake stake row that single cylindrical slurry core pile body is from the above mentioned formed respectively in the foundation ditch soil at both sides, thereby the foundation ditch soil at both sides is formed strong pile body supporting so by design;
7) excavation pit supports in applying etc.;
8) operation finishes in the foundation ditch, supports in removing, and finishes backfilling of earthwork;
9) extract and preset the steel pipe core in the cylindrical slurry core stake,, recover ground again with sand backfill stake hole.Example 2 certain solid rock soil property foundation pit construction operation, cylindrical slurry core stake stake position center distance 500mm, foundation depth 6.0m, cylindrical slurry core stake height 9.0m.
Whole construction operations and example 1.
Example 3 topsoils are that weak relatively cohesive soil, subsoil are the foundation pit construction operation of solid rock soil property, cylindrical slurry core stake stake position center distance 400mm, foundation depth 5.0m, cylindrical slurry core stake height 8.0m.
1) ground and underground obstacle are got rid of in the leveling place, location, stake hole, pile-forming machine perching;
2) the weak relatively cohesive soil for the upper strata adopts sleeve pipe retaining wall pore-forming, and for the solid rock soil property employing drilled dry pore-forming of lower floor, the aperture is all 180mm-250mm;
3) hole depth reaches design height, and pump drainage hole Zhong Shui, the soil body that cements out place beyond the 3.0m of limit, aperture;
4) utilize backhoe or rig will descend the steel concrete tubing core of end closure to insert in the boring, utilize the locator location;
5) hole between steel pipe core 4 and the hole wall 5 injects cement slurry, and slip casting finishes and solidifies the preceding protection casing that takes out, and solidifies back slurry 6 and forms single cylindrical slurry core stake pile body with core 4;
Following working procedure is with example 1.
Example 4 topsoils are that solid rock soil property, subsoil are the foundation pit construction operation of weak relatively cohesive soil,
Cylindrical slurry core stake stake position center distance 400mm, foundation depth 5.0m, cylindrical slurry core stake height 9.0m.
1) ground and underground obstacle are got rid of in the leveling place, location, stake hole, pile-forming machine perching;
2) the solid rock soil property for the upper strata adopts the drilled dry pore-forming, and for the weak relatively cohesive soil employing sleeve pipe retaining wall pore-forming of lower floor, the aperture is all 180mm-250mm;
Following working procedure is identical with example 3.
Claims (2)
1, a kind of construction method of cylindrical slurry core pile that is used for pattern foundation pit supporting structure, be according to the pile body height of design in advance and density is set, before excavation of foundation pit, by the cylindrical slurry core stake of being preset the specified altitude that on-the-spot sizing material forming body that hollow core and outer wall thereof connect forms by the center is set at interval at foundation ditch both sides body of wall, form cylindrical slurry core stake soldier pile row in the both walls for the treatment of construction foundation pit in advance, after the foundation ditch interior construction is finished, extract the hollow core that presets this slurry core stake inside and a kind of foundation pit supporting method in backfill stake hole.
The processing step of a kind of slurry core pile construction method that is used for pattern foundation pit supporting structure of 2, implementing claim 1 is as follows:
One, according to the distribution design of pattern foundation pit supporting structure pile body, locate in the stake hole in advance;
Two,,, adopt to be suitable for rig or other machinery, drilled dry or sleeve pipe retaining wall pore-forming according to soil condition at place, pile body location;
Three,, the hollow core of circular cross-section or square-section is preset in the above-mentioned stake hole with locator location;
Four, at the outer wall of hollow core (4) and the hole between the stake hole inwall (5), adopt cement paste or other colloidality slurry to fill, the sizing material forming body (6) after slurry solidifies forms single cylindrical slurry core stake with hollow core (4);
Five,, carry out foundation ditch and excavate construction and the construction of corresponding interior support facility thereof by designing after cylindrical slurry core stake supporting is finished in the foundation ditch both sides;
Six, after foundation pit construction finishes and finishes backfilling of earthwork, extract the hollow core that presets in this slurry core stake;
Seven,, and recover ground with sand backfill stake hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009100631582A CN101597903B (en) | 2009-07-14 | 2009-07-14 | Construction method of cylindrical slurry core pile for retaining and protecting foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100631582A CN101597903B (en) | 2009-07-14 | 2009-07-14 | Construction method of cylindrical slurry core pile for retaining and protecting foundation pit |
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| CN101597903A true CN101597903A (en) | 2009-12-09 |
| CN101597903B CN101597903B (en) | 2011-05-25 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967829A (en) * | 2010-10-29 | 2011-02-09 | 中国神华能源股份有限公司 | Construction method of base pit |
| CN102330430A (en) * | 2011-07-18 | 2012-01-25 | 上海市隧道工程轨道交通设计研究院 | Construction method for prefabricated building enclosure of deep foundation pit in low-temperature environment construction |
| CN109914421A (en) * | 2019-03-01 | 2019-06-21 | 华北水利水电大学 | A kind of side slope reinforcement of foundation pit recyclable mini pile steel pipe and its construction method |
| CN110173267A (en) * | 2019-06-06 | 2019-08-27 | 中铁一局集团第二工程有限公司 | Building up station construction method is passed through in a kind of metro shield section |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5096333A (en) * | 1990-04-27 | 1992-03-17 | Jeanne Bassett | Foundation repair method and apparatus |
| CN101054802A (en) * | 2007-05-24 | 2007-10-17 | 宋琼 | Method for static steel structure pile applying to deep foundation pit support |
-
2009
- 2009-07-14 CN CN2009100631582A patent/CN101597903B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101967829A (en) * | 2010-10-29 | 2011-02-09 | 中国神华能源股份有限公司 | Construction method of base pit |
| CN102330430A (en) * | 2011-07-18 | 2012-01-25 | 上海市隧道工程轨道交通设计研究院 | Construction method for prefabricated building enclosure of deep foundation pit in low-temperature environment construction |
| CN109914421A (en) * | 2019-03-01 | 2019-06-21 | 华北水利水电大学 | A kind of side slope reinforcement of foundation pit recyclable mini pile steel pipe and its construction method |
| CN110173267A (en) * | 2019-06-06 | 2019-08-27 | 中铁一局集团第二工程有限公司 | Building up station construction method is passed through in a kind of metro shield section |
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| CN101597903B (en) | 2011-05-25 |
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