CN103469798A - Pit support structure and construction method thereof - Google Patents
Pit support structure and construction method thereof Download PDFInfo
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- CN103469798A CN103469798A CN201310380666XA CN201310380666A CN103469798A CN 103469798 A CN103469798 A CN 103469798A CN 201310380666X A CN201310380666X A CN 201310380666XA CN 201310380666 A CN201310380666 A CN 201310380666A CN 103469798 A CN103469798 A CN 103469798A
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Abstract
The invention discloses a pit support structure and a construction method thereof. The pit support structure comprises a pit support pile, a water-stopping curtain, an earth berm and a horizontal lattice steel support. The pit support pile is a cast-in-place reinforced concrete bored pile. The water stopping curtain is a row of meshed cement mixing piles and disposed on one side, corresponding to the periphery of a pit, of the pit support pile. The horizontal lattice steel support is disposed between a cap beam and a reinforced concrete bracket.
Description
Technical field
Patent of the present invention relates to a kind of foundation pit supporting construction and job practices thereof, belongs to the Geotechnical Engineering field.
Technical background
Along with developing rapidly of highrise building increased, foundation ditch is by increasing, darker, and the construction of the supporting and protection structure of foundation ditch is also by more and more difficult.In building construction process, for the construction that guarantees underground structure and safety and the easy construction of surrounding deep foundation pit environment, must take to deep-foundation side wall and surrounding enviroment the measure of supporting and reinforcing.
At present, to the super large foundation ditch, the common employing bored pile of pattern foundation pit supporting structure, arrange the horizontal reinforcement concrete support in hole, improved rigidity and the stability of foundation pit enclosure structure, controlled preferably foundation pit deformation, and the foundation ditch accident greatly reduces.Weak point is that construction, maintenance and support replacement thereof and the dismounting of reinforced concrete support extended the foundation pit construction duration, has improved construction costs, also to basement construction, makes troubles.
Summary of the invention
The deficiency existed for prior art, the object of the present invention is to provide a kind of foundation pit supporting construction and job practices thereof that facilitates basement structure construction, saving engineering cost, shortens the foundation pit construction duration.
The present invention is achieved by the following technical solutions:
A kind of foundation pit supporting construction, comprise foundation pit supporting pile, water-stop curtain, back-pressure soil and horizontal lattice steel support, described foundation pit supporting pile is set to the cast-in-situ steel reinforced concrete bored pile, described water-stop curtain is set to the engaged cement mixing method of a row, and described water-stop curtain is arranged on the corresponding foundation ditch periphery of foundation pit supporting pile one side, and described horizontal lattice steel supports and is arranged between cap and Reinforced Concrete Corbels.
Be provided with reinforcing cage in described existing bar pouring concrete drilling bored concrete pile, the longitudinal rib of corresponding water-stop curtain one side of described reinforcing cage distributes close in opposite side.
Described cast-in-situ concrete bored pile top is provided with the steel concrete cap, and a side of cap leans on cement mixing method.
Be inserted with many bar dowels in described back-pressure soil, and at domatic sprayed mortar.
Advantage of the present invention is:
Base pit stand construction described in the present invention, incorporation engineering actual conditions and surrounding enviroment have adopted multiple support system, the pattern foundation pit supporting structure mode that adopts reserved back-pressure soil and horizontal lattice steel to support a kind of cost-effective support pattern of can yet be regarded as, especially be applicable to the supporting of large-scale excavation.
(1) support by cement mixing method, bored pile and horizontal lattice steel the foundation pit supporting system formed, given full play to characteristics separately, can guarantee sealing and the displacement control of foundation ditch, and significantly shorten the construction period.
(2) adopt " benzvalene form " shoveling mode, insert bar dowel in the interior reserved back-pressure soil of foundation ditch and form earth structure, domatic sprayed mortar, its internal stability and the stable problem of external overall during with solution foundation pit supporting construction the first operating mode.
(3) horizontal lattice steel is supported on prefabrication, after dismounting, can have enough to meet the need use, has not only reduced construction costs but also shortened the construction period.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Reference numeral: 1-foundation pit supporting pile, 2-water-stop curtain, 3-horizontal lattice steel support, 4-back-pressure soil, 5-steel concrete cap, 6-Reinforced Concrete Corbels, 7-steel concrete cap, 8-bar dowel, 9-sprayed mortar, 10-foundation ditch central area sole plate, 11-foundation ditch central area agent structure, 12-foundation ditch perimeter zone sole plate, 13-foundation ditch perimeter zone agent structure.
The specific embodiment
Embodiment: as shown in Figure 1 and Figure 2, a kind of foundation pit supporting construction comprises foundation pit supporting pile 1, water-stop curtain 2, horizontal lattice steel support 3, back-pressure soil 4, steel concrete cap 5, Reinforced Concrete Corbels 6, steel concrete cap 7, bar dowel 8, sprayed mortar 9, foundation ditch central area sole plate 10, foundation ditch central area agent structure 11, foundation ditch perimeter zone sole plate 12, foundation ditch perimeter zone agent structure 13.Described water-stop curtain 2 is set to the engaged cement mixing method of a row, described water-stop curtain is arranged on the corresponding foundation ditch periphery of foundation pit supporting pile one side, described bored pile 1 is close to water-stop curtain 2, and described horizontal lattice steel supports 3 and is arranged between Reinforced Concrete Corbels 5 and steel concrete cap 7.
A kind of job practices of foundation pit supporting construction is characterized in that: comprise the following steps:
The first step: according to site condition and computational analysis, determine that the stake of bored pile 1 is long, stake footpath, spacing and arrangement of reinforcement, determine that the stake of cement mixing method is long, stake footpath, spacing;
Second step: cross section, the arrangement of reinforcement of determining bored pile top steel concrete cap 5;
The 3rd step: construction water-stop curtain 2;
The 4th step: construction drill castinplace pile 1;
The 5th step: construction reinforced bar concrete cap 5;
The 6th step: the earthwork of excavation pit central area, reserved back-pressure soil 4;
Be inserted with many bar dowels 8 in described reserved back-pressure soil 4, and at domatic sprayed mortar 9, its internal stability and the stable problem of external overall during with solution foundation pit supporting construction the first operating mode.
The 7th step: at the bottom of hole, foundation ditch central area, being cleared up, flatten, build bed course, construction central area sole plate 10 and agent structure 11;
The 8th step: horizontal lattice steel is installed and is supported 3;
The 9th step: excavation pit periphery back-pressure soil 4;
The tenth step: at the bottom of hole, foundation ditch perimeter zone, being cleared up, flatten, build bed course, construction foundation pit periphery sole plate 12 and agent structure 13;
The 11 step: remove horizontal lattice steel support 4, Reinforced Concrete Corbels 6.
Certainly, the invention is not limited to above-mentioned embodiment, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and the modification that these are equal to or replacement all are included in the application's claim limited range.
Claims (5)
1. a foundation pit supporting construction, it is characterized in that: comprise that foundation pit supporting pile, water-stop curtain, back-pressure soil and horizontal lattice steel support, described foundation pit supporting pile is set to the cast-in-situ steel reinforced concrete bored pile, described water-stop curtain is set to the engaged cement mixing method of a row, described water-stop curtain is arranged on the corresponding foundation ditch periphery of foundation pit supporting pile one side, and described horizontal lattice steel supports and is arranged between cap and Reinforced Concrete Corbels.
2. foundation pit supporting construction according to claim 1 is characterized in that: be provided with reinforcing cage in described cast-in-situ steel reinforced concrete bored pile, the longitudinal rib of corresponding water-stop curtain one side of described reinforcing cage distributes close in opposite side.
3. foundation pit supporting construction according to claim 1 is characterized in that: described cast-in-situ concrete bored pile top is provided with the steel concrete cap, and a side of cap leans on cement mixing method.
4. foundation pit supporting construction according to claim 1 is characterized in that: be inserted with many bar dowels in described back-pressure soil, and at the jet surface concrete.
5. the job practices of foundation pit supporting construction as claimed in claim 1 is characterized in that: comprise the following steps:
The first step: according to site condition and computational analysis, determine that the stake of bored pile is long, stake footpath, spacing and arrangement of reinforcement, determine that the stake of cement mixing method is long, stake footpath, spacing;
Second step: cross section, the arrangement of reinforcement of determining bored pile top steel concrete cap;
The 3rd step: construction water-stop curtain;
The 4th step: construction drill castinplace pile;
The 5th step: construction reinforced bar concrete cap;
The 6th step: the earthwork of excavation pit central area, reserved back-pressure soil;
The 7th step: at the bottom of hole, foundation ditch central area, being cleared up, flatten, build bed course, construction central area sole plate and agent structure;
The 8th step: horizontal lattice steel is installed and is supported;
The 9th step: excavation pit periphery back-pressure soil;
The tenth step: at the bottom of hole, foundation ditch perimeter zone, being cleared up, flatten, build bed course, construction foundation pit periphery sole plate and agent structure;
The 11 step: remove horizontal lattice steel support, Reinforced Concrete Corbels.
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| CN201310380666.XA CN103469798B (en) | 2013-08-28 | 2013-08-28 | A kind of foundation pit supporting construction and construction method thereof |
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| CN201310380666.XA CN103469798B (en) | 2013-08-28 | 2013-08-28 | A kind of foundation pit supporting construction and construction method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032763A (en) * | 2014-06-25 | 2014-09-10 | 上海市建工设计研究院有限公司 | Combined-type anti-seepage waterstop curtain structure and construction method thereof |
| CN105040728A (en) * | 2015-06-05 | 2015-11-11 | 朱奎 | Three-layer basement supporting structure |
| CN105178326A (en) * | 2015-06-03 | 2015-12-23 | 福建工程学院 | Water stop method for upper-soft and lower-hard water-rich stratum foundation pit engineering retaining structure |
| CN105887889A (en) * | 2016-04-20 | 2016-08-24 | 中铁上海工程局集团有限公司 | Excavation construction method for super-wide low-permeability silty deep foundation pit |
| CN106120805A (en) * | 2016-06-23 | 2016-11-16 | 程华清 | The construction method of the ultra-deep foundation pit supporting under dilapidated house environment |
| CN107503355A (en) * | 2017-07-20 | 2017-12-22 | 广东省建筑工程集团有限公司 | Shaped steel formula double-row pile foundation pit supporting system and its construction method are inserted after outer row |
| CN108316316A (en) * | 2018-04-18 | 2018-07-24 | 南京工业大学 | Support system suitable for island type support and application thereof |
| CN109403339A (en) * | 2018-10-16 | 2019-03-01 | 中建局集团建设发展有限公司 | The deep basal pit composite supporting construction and its method for protecting support of double-row pile combination method of center island |
| CN113668550A (en) * | 2021-08-04 | 2021-11-19 | 深圳宏业基岩土科技股份有限公司 | Construction method for supporting foundation pit under geological condition of silt |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032763A (en) * | 2014-06-25 | 2014-09-10 | 上海市建工设计研究院有限公司 | Combined-type anti-seepage waterstop curtain structure and construction method thereof |
| CN105178326A (en) * | 2015-06-03 | 2015-12-23 | 福建工程学院 | Water stop method for upper-soft and lower-hard water-rich stratum foundation pit engineering retaining structure |
| CN105178326B (en) * | 2015-06-03 | 2017-05-31 | 福建工程学院 | Upper soft lower hard water rich strata base pit engineering building enclosure water-stopping method |
| CN105040728A (en) * | 2015-06-05 | 2015-11-11 | 朱奎 | Three-layer basement supporting structure |
| CN105887889A (en) * | 2016-04-20 | 2016-08-24 | 中铁上海工程局集团有限公司 | Excavation construction method for super-wide low-permeability silty deep foundation pit |
| CN105887889B (en) * | 2016-04-20 | 2018-04-24 | 中铁上海工程局集团有限公司 | A kind of ultra-wide hyposmosis mud method of excavation of deep foundation pit |
| CN106120805B (en) * | 2016-06-23 | 2019-09-13 | 程华清 | The construction method of ultra-deep foundation pit supporting under dilapidated house environment |
| CN106120805A (en) * | 2016-06-23 | 2016-11-16 | 程华清 | The construction method of the ultra-deep foundation pit supporting under dilapidated house environment |
| CN107503355A (en) * | 2017-07-20 | 2017-12-22 | 广东省建筑工程集团有限公司 | Shaped steel formula double-row pile foundation pit supporting system and its construction method are inserted after outer row |
| CN107503355B (en) * | 2017-07-20 | 2023-10-13 | 广东省建筑工程集团有限公司 | Externally-arranged rear-inserted steel type double-row pile foundation pit supporting system and construction method thereof |
| CN108316316A (en) * | 2018-04-18 | 2018-07-24 | 南京工业大学 | Support system suitable for island type support and application thereof |
| CN109403339A (en) * | 2018-10-16 | 2019-03-01 | 中建局集团建设发展有限公司 | The deep basal pit composite supporting construction and its method for protecting support of double-row pile combination method of center island |
| CN109403339B (en) * | 2018-10-16 | 2024-01-23 | 中建一局集团建设发展有限公司 | Deep foundation pit composite supporting structure combining double-row piles with center island method and supporting method thereof |
| CN113668550A (en) * | 2021-08-04 | 2021-11-19 | 深圳宏业基岩土科技股份有限公司 | Construction method for supporting foundation pit under geological condition of silt |
| CN113668550B (en) * | 2021-08-04 | 2023-03-07 | 深圳宏业基岩土科技股份有限公司 | Construction method for supporting foundation pit under geological condition of silt |
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| CN103469798B (en) | 2016-01-20 |
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