CN101787701B - Construction method for supporting pine pile in elevator shaft foundation pit - Google Patents
Construction method for supporting pine pile in elevator shaft foundation pit Download PDFInfo
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- CN101787701B CN101787701B CN 201010127272 CN201010127272A CN101787701B CN 101787701 B CN101787701 B CN 101787701B CN 201010127272 CN201010127272 CN 201010127272 CN 201010127272 A CN201010127272 A CN 201010127272A CN 101787701 B CN101787701 B CN 101787701B
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Abstract
The invention relates to a construction method for supporting a pine pile in an elevator shaft foundation pit, belonging to the technical field of supporting the elevator shaft foundation pit of buildings and comprising the following steps of: paying off lines, pressing the pine pile by using an excavator, setting a top support, excavating and manufacturing a foundation pit bottom support, building brick molds, removing the top support and casting capping concrete. The method has the advantages of low construction cost, short construction period and good supporting effect, and is suitable for pits in foundation-pit supporting engineering of coastal soft soil foundations with the soil of silt or silt clay and the pits in foundation-pit (elevator shaft foundations) of the buildings with the excavation depth within 3m.
Description
Technical field
The invention belongs to building elevator shaft Base hole supporting technology field, refer in particular to a kind of construction method for supporting pine pile in elevator shaft foundation pit.
Background technology
Weak geology soil property feature at domestic certain areas: be mud or silt clay below the 2m, thickness reaches 20-30m.Along with the development of foundation pit construction technology, going along with sb. to guard him of basement foundation ditch correspondingly is tending towards safe and perfect, but for the elevator shaft supporting of cheating in the hole, it is gone along with sb. to guard him still needs treat respectively according to different depth, makes it reasonable, safe, cheap, is convenient to construction.
General high building construction work, the degree of depth of elevator shaft 2m～4m under base plate of foundation pit.It goes along with sb. to guard him form open caisson, cement mixing pile gravity barricade, and its weak point is: the cost height of cement mixing pile gravity barricade, long in time limit.
Summary of the invention
The purpose of this invention is to provide the construction method for supporting pine pile in elevator shaft foundation pit that a kind of cost is low, the duration is short, supporting effect is good.
The object of the present invention is achieved like this:
Construction method for supporting pine pile in elevator shaft foundation pit includes following steps:
(1) unwrapping wire: hole plane positioning unwrapping wire at the bottom of the bed course of the basement foundation ditch of building bottom, cheating by the width of pine stake around the elevator shaft foundation ditch and stock mould, and spread the lime line;
(2) utilize excavator to press timber: to use rope, one is hung on excavator bucket tooth, one is tacked one meter, pine stake end, sling, one people commander with the pine stake set by step the position of the pine stake of (1) unwrapping wire in place after, press down the pine stake to design stake top mark height with the grab bucket plane, press the pine stake to form the rectangle guide pile by the interval of setting successively;
(3) establish top braces: select for use the pine stake as enclosing the purlin material, along the inside top of rectangle guide pile successively with U-shaped nail with the rectangle guide pile with enclose purlin and enclose purlin with the formation of pine dowel pin jail, simultaneously at the middle part horizontal shore (shoring) is set, required space when horizontal shore (shoring) being set considering to cut the earth;
(4) cut the earth and make the end, hole and support: in the rectangle guide pile, take little excavator to cut the earth, dig the bed course base plate absolute altitude of elevator shaft when soil after, lay piece stone bed course immediately, build the concrete bed course, form the end, hole to support;
(5) mould of laying bricks: accurate unwrapping wire stock mould position around the end, hole, stock mould around building, slit between stock mould and the pine stake is tamped with yellow sand while building, build when stock mould and do the concrete collar tie beam when cheating half dark height, continuing to lay bricks mould absolute altitude at the bottom of the base plate on the concrete collar tie beam;
(6) remove top braces, build the concrete that bears down on one: remove when enclosing the top braces of purlin and horizontal shore (shoring), should strengthen observing, as find that stock mould has the sidesway phenomenon, then in time add collar tie beam place horizontal support, guarantee supporting safety in hole in the hole, the inboard rectangle guide pile that outwards coats is built the concrete that bears down on one to the edge, bed course base of foundation ditch bottom along the upper end of stock mould, the upper surface flush at the bottom of the bed course of the last plane of the concrete that bears down on one and foundation ditch bottom, and inner surface flushes with the inner surface of stock mould.
Above-mentioned pine stake and the width sum of stock mould are 500mm.
Above-mentioned rope is the rope made of hemp.
The length of above-mentioned pine stake is 5.8～6.2m, and top diameter is greater than 0.09～0.11m, and the pine stake is by every meter at least 3 settings.
The length of above-mentioned pine stake is 6m, and top diameter is greater than 0.1m.
Above-mentioned concrete collar tie beam is: at 0.24 * 0.24m
2Sectional area in join 4 of φ 14 reinforcing bars, stirrup φ 6@200 builds the C20 concrete, forms elevator shaft foundation ditch middle part and supports.
The advantage that the present invention gives prominence to compared to existing technology is:
1, going along with sb. to guard him and soil excavation of elevator shaft, it is shorter better directly influence the safe construction phase that basement foundation ditch goes along with sb. to guard him, and the present invention takes the pine stake to add to support then the duration the shortest, the while easy construction, compliance is stronger;
2, the present invention utilizes excavator to press the pine stake earlier, and recycling excavator excavation pit is very convenient, kills two birds with one stone;
3, the present invention selects supporting pine pile, adapts to the degree of depth of elevator shaft in 3m, timber can be pressed into more than the soil layer 3m, and the timber top is established and enclosed purlin, and with pine to having shored, form the support system that seals, the cost of material is low, intensity is big, supporting effect is good;
4, the present invention is applicable to coastal soft foundation, and soil property is mud or silt clay, and the digging depth in hole (elevator pit) is cheated support engineering at 3m in interior hole in the hole.
Description of drawings
Fig. 1 is the position view of elevator shaft foundation ditch of the present invention in basement foundation ditch;
Fig. 2 is the present invention presses down the pine stake in the elevator shaft foundation ditch with little excavator sectional view;
Fig. 3 is the sectional view that the present invention's rectangle guide pile is provided with top braces;
Fig. 4 is the structure vertical view of rectangle guide pile of the present invention and top braces;
Fig. 5 is the schematic diagram that the present invention cuts the earth in the elevator shaft foundation ditch with little excavator;
Fig. 6 is lay bricks in the elevator shaft foundation ditch sectional view behind mould and the pour concrete collar tie beam of the present invention;
Fig. 7 is overall structure sectional view of the present invention.
The specific embodiment
With specific embodiment the present invention is further described below, referring to Fig. 1-7:
Technological principle of the present invention is as soldier pile with the pine stake, be pressed into the pine stake in the soil in order with excavator, the edge at top is established and is enclosed purlin and the top is formed go along with sb. to guard him, and make interim horizontal brace with pine, can cut the earth, utilize bed course and collar tie beam to carry out support replacement behind the soil excavation, be that bottom support (concrete bed course) and middle part support (concrete collar tie beam) substitutes pine stake top horizontal support, remove top braces, form the elevator pit space, can carry out the foundation ditch structure construction, the degree of depth of elevator shaft foundation ditch of the present invention is in 3m, its cross section is less, adopts 6m pine stake sealing to go along with sb. to guard him, and namely safety is convenient to construction again.
Construction method for supporting pine pile in elevator shaft foundation pit includes following steps:
(1) unwrapping wire: at the bottom of the bed course of basement foundation ditch 1 bottom of building on 16 by elevator shaft foundation ditch 2 around the width of pine stakes 3 and stock mould 8 cheat in hole plane positioning unwrapping wire, and spread the lime line;
(2) utilize excavator 4 to press timber: to use rope, one is hung on excavator 4 bucket teeth, one is tacked one meter, pine stake 3 ends, sling, one people commander with pine stake 3 set by step the position of the pine stake 3 of (1) unwrapping wire in place after, press down pine stake 3 to the high H1 of design stake top mark with the grab bucket plane, press pine stake 3 to form the rectangle guide pile by the interval of setting successively;
(3) establish top braces: select for use pine stake 3 as enclosing the purlin material, along the inside top of rectangle guide pile successively with U-shaped nail 30 with the rectangle guide pile with enclose purlin and enclose purlin 5 with pine stake 3 stickfast formation, a horizontal shore (shoring) 6 is set at the middle part simultaneously, form " day " font top braces, certainly, if the length of elevator shaft foundation ditch 2 is longer, the horizontal shore (shoring) 6 more than also can be set, required space when horizontal shore (shoring) 6 being set considering to cut the earth;
(4) cut the earth and make the end, hole and support: take little excavator 4 to cut the earth in the rectangle guide pile, the bed course base plate absolute altitude H2 that digs elevator shaft when soil (generally behind 1.5m～3m), lays piece stone bed course immediately, builds the concrete bed course, form the end, hole to support 7;
(5) mould of laying bricks: accurate unwrapping wire stock mould position around the end, hole, stock mould 8 around building, slit between stock mould 8 and the pine stake 3 is tamped with yellow sand while building, build when stock mould 8 and do concrete collar tie beam 9 when cheating half dark height, continuing to lay bricks mould 8 absolute altitude H2 at the bottom of the base plate on the concrete collar tie beam 9;
(6) remove top braces, build the concrete that bears down on one: remove when enclosing the top braces of purlin 5 and horizontal shore (shoring) 6, should strengthen observing, as find that stock mould 8 has the sidesway phenomenon, then in time add collar tie beam place horizontal support 6, guarantee supporting safety in hole in the hole, the concrete 10 that bears down on one is built at 16 edges at the bottom of along the inboard outwards coating in the upper end of stock mould 8 rectangle guide pile to the bed course of foundation ditch bottom, 16 upper surface flush at the bottom of the bed course of the last plane of the concrete 10 that bears down on one and foundation ditch bottom, and inner surface flushes with the inner surface of stock mould 8.
Above-mentioned pine stake 3 is 500mm with the width sum of stock mould 8.
Above-mentioned rope is the rope made of hemp.
The length of above-mentioned pine stake 3 is 5.8～6.2m, and top diameter is greater than 0.09～0.11m, and pine stake 3 is by every meter at least 3 settings.
General employing length is 6m, and top diameter is greater than the pine stake 3 of 0.1m.
Above-mentioned concrete collar tie beam is: at 0.24 * 0.24m
2Sectional area in join 4 of φ 14 reinforcing bars, stirrup φ 6@200 builds the C20 concrete, forms the support of elevator shaft foundation ditch 2 middle parts.
The present invention construct needed main material and equipment:
1, main material: pine stake (6m is long, and top diameter is greater than 100mm), U-shaped nail, cement brick or hollow brick,
2, main facility: excavator, the rope made of hemp, tower crane, transit and tape measure etc.
Key Quality Control of the present invention is:
1, quality requirements of raw materials: select for use tall and straight straight, the pine stake of microcephaly 〉=100mm; Brick, mortar and concrete strength will meet the requirements.
2, process quality requires: the timber supporting should meet the requirement of building foundation pit supporting tecnical regulations JGJ120-99; Lay bricks and concrete project is carried out " concrete Structural Engineering construction quality standards of acceptance " and is numbered GB50204-2002 and " code for construction and acceptance of masonry structure engineering " is numbered GB50203-2002.
The present invention's safety measure that need take of constructing is:
1, note supporting whether loosening phenomenon is arranged, in time reinforce during cutting the earth, the sedimentation of edge of foundation changes can not be greater than 30mm, otherwise will stop to cut the earth, and takes corresponding emergency measure.
Space between brick fetal membrane and the pine stake is tamped with sand or rubble while building when 2, laying bricks fetal membrane, make it stressed jointly.
3, it is dismountable that the concrete strength of middle part collar tie beam reaches the interim support in design strength 70% back.
Performance analysis of the present invention:
Barricade is gone along with sb. to guard him if the elevator shaft foundation ditch is taked cement mixing pile gravity, then the construction period long, cost height, basement the bigger of deep water mud waste of healing, and very high to the quality requirement of agitation pile as the gravity barricade is difficult to guarantee.
If employing open caisson, cost are higher naturally, construction period is also long, and easy construction is gone along with sb. to guard him in the pine stake by contrast, and is simple, as long as firm supporting, bed course and collar tie beam are in time built.Foundation ditch safety is very secure.
Appropriation budget:
| Support pattern | Duration (my god) | Cost |
| Open caisson is gone along with sb. to guard him | 15 | Steel bar concrete: 22m 3* 500 yuan/m 3* 4=44000 yuan open caisson expenses: 5000 yuan * 4=20000 yuan subtotals: 66000 yuan |
| Cement mixing pile is gone along with sb. to guard him | 28 | Agitation pile: 150m 3* 120 yuan/m 3* 4=72000 yuan |
| The pine stake is gone along with sb. to guard him | 4 | Pine stake: 36 * 60 yuan/root * 4=8640 yuan |
The present invention is applicable to coastal soft foundation, and soil property is mud or silt clay, and the digging depth in hole (elevator pit) is cheated support engineering at 3m in interior hole in the hole of building.
Claims (1)
1. construction method for supporting pine pile in elevator shaft foundation pit includes following steps:
(1) unwrapping wire: hole plane positioning unwrapping wire at the bottom of the bed course of the basement foundation ditch of building bottom, cheating by the width of pine stake around the elevator shaft foundation ditch and stock mould, and spread the lime line;
(2) utilize excavator to press timber: to use rope, one is hung on excavator bucket tooth, one is tacked one meter, pine stake end, sling, one people commander with the pine stake set by step the position of the pine stake of (1) unwrapping wire in place after, press down the pine stake to design stake top mark height with the grab bucket plane, press the pine stake to form the rectangle guide pile by the interval of setting successively;
(3) establish top braces: select for use the pine stake as enclosing the purlin material, along the inside top of rectangle guide pile successively with U-shaped nail with the rectangle guide pile with enclose purlin and enclose purlin with the formation of pine dowel pin jail, simultaneously at the middle part horizontal shore (shoring) is set, required space when horizontal shore (shoring) being set considering to cut the earth;
(4) cut the earth and make the end, hole and support: in the rectangle guide pile, take little excavator to cut the earth, dig the bed course base plate absolute altitude of elevator shaft when soil after, lay piece stone bed course immediately, build the concrete bed course, form the end, hole to support;
(5) mould of laying bricks: accurate unwrapping wire stock mould position around the end, hole, stock mould around building, slit between stock mould and the pine stake is tamped with yellow sand while building, build when stock mould and do the concrete collar tie beam when cheating half dark height, continuing to lay bricks mould absolute altitude at the bottom of the base plate on the concrete collar tie beam;
(6) remove top braces, build the concrete that bears down on one: remove when enclosing the top braces of purlin and horizontal shore (shoring), should strengthen observing, as find that stock mould has the sidesway phenomenon, then in time add collar tie beam place horizontal support, guarantee supporting safety in hole in the hole, the inboard rectangle guide pile that outwards coats is built the concrete that bears down on one to the edge, bed course base of foundation ditch bottom along the upper end of stock mould, the upper surface flush at the bottom of the bed course of the last plane of the concrete that bears down on one and foundation ditch bottom, and inner surface flushes with the inner surface of stock mould;
The width sum of described pine stake and stock mould is 500mm;
Described rope is the rope made of hemp;
The length of described pine stake is 5.8～6.2m, and top diameter is greater than 0.09～0.11m, and the pine stake is by every meter at least 3 settings;
Described concrete collar tie beam is: at 0.24 * 0.24m
2Sectional area in join 4 of φ 14 reinforcing bars, stirrup φ 6@200 builds the C20 concrete, forms elevator shaft foundation ditch middle part and supports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010127272 CN101787701B (en) | 2010-03-16 | 2010-03-16 | Construction method for supporting pine pile in elevator shaft foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010127272 CN101787701B (en) | 2010-03-16 | 2010-03-16 | Construction method for supporting pine pile in elevator shaft foundation pit |
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| CN101787701A CN101787701A (en) | 2010-07-28 |
| CN101787701B true CN101787701B (en) | 2013-07-31 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102071698B (en) * | 2010-12-24 | 2012-07-04 | 浙江中南建设集团有限公司 | Construction method of beddings of foundation downward overturn beam and pile cap |
| CN102561408A (en) * | 2012-02-24 | 2012-07-11 | 山东同圆设计集团有限公司 | Obliquely and mutually supported underground water-resistant structure and construction method thereof |
| CN102966074B (en) * | 2012-11-07 | 2015-04-22 | 深圳市工勘岩土工程有限公司 | Artificial channel bank protection structure and method for constructing same |
| CN103195067A (en) * | 2013-03-29 | 2013-07-10 | 中国十七冶集团有限公司 | Deep foundation pit muddy-silty clay cushion layer construction method |
| CN104060618A (en) * | 2014-07-04 | 2014-09-24 | 上海建工七建集团有限公司 | Method for designing foundation pit support |
| CN109958123A (en) * | 2017-12-25 | 2019-07-02 | 中国二十冶集团有限公司 | Steel sheet pile method for protecting support for completely decomposed sandstone foundation pit |
| CN108978680B (en) * | 2018-08-22 | 2020-11-27 | 中天建设集团有限公司 | Mucky soil elevator foundation pit supporting construction device and method |
| CN115142433A (en) * | 2022-07-08 | 2022-10-04 | 中国建筑第八工程局有限公司 | Foundation pit supporting structure and construction method thereof |
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| CN101205722A (en) * | 2006-12-18 | 2008-06-25 | 郑鸿彰 | Integral rapid construction method for earthwork, ground mould and pile of manhole pile multi-pile cap |
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| CN101205722A (en) * | 2006-12-18 | 2008-06-25 | 郑鸿彰 | Integral rapid construction method for earthwork, ground mould and pile of manhole pile multi-pile cap |
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