CN108239986A - The small steel pipe dado reinforced construction method of artificial digging pile drift sand formation - Google Patents

The small steel pipe dado reinforced construction method of artificial digging pile drift sand formation Download PDF

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Publication number
CN108239986A
CN108239986A CN201611271931.0A CN201611271931A CN108239986A CN 108239986 A CN108239986 A CN 108239986A CN 201611271931 A CN201611271931 A CN 201611271931A CN 108239986 A CN108239986 A CN 108239986A
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CN
China
Prior art keywords
drift sand
sand formation
steel pipe
retaining
layer
Prior art date
Application number
CN201611271931.0A
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Chinese (zh)
Inventor
张双平
黄旭生
刘炜
Original Assignee
张双平
黄旭生
刘炜
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 张双平, 黄旭生, 刘炜 filed Critical 张双平
Priority to CN201611271931.0A priority Critical patent/CN108239986A/en
Publication of CN108239986A publication Critical patent/CN108239986A/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/06Foundation trenches ditches or narrow shafts
    • E02D17/08Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/66Mould-pipes or other moulds
    • E02D5/68Mould-pipes or other moulds for making bulkheads or elements thereof

Abstract

The present invention provides a kind of small steel pipe dado reinforced construction method of artificial digging pile drift sand formation, when artificial digging pile is excavated to drift sand formation top close to drift sand formation, along the base angle of current excavation line, the small steel pipe of first layer of certain length is hammered with the angular drift sand formation of certain flare around stake holes inner wall, then the retaining wall on drift sand formation upper strata is poured, conduit upper end is cast in this layer of retaining wall when pouring;Then make retaining wall using small steel pipe and excavate drift sand formation downwards, (be no more than 1m) when reaching certain depth, hammer second layer steel pipe to drift sand formation and pour retaining wall, so cycle construction, until passing through drift sand formation.The present invention can guarantee borehole operation quality to the pile foundation pore-forming containing drift sand formation, it is safe, it is at low cost, and construction efficiency is good, in addition to drift sand formation is encountered suitable for pile foundation drilling construction, moreover it is possible to meet pile foundation pore-forming and meet the geological conditions such as soft modeling soil property, mud and the molten room of karst area.

Description

The small steel pipe dado reinforced construction method of artificial digging pile drift sand formation
Technical field
The present invention relates to drift sand formation, mud and molten room of karst area etc. are met during artificial digging pile pile foundation construction poorly Matter situation need to use the method for the ancillary technique guarantee smooth pore-forming of artificial digging pile.
Background technology
It,, be in stake usually per certain depth is excavated downwards to prevent hole wall collapse in pile foundation manually digging hole work progress A layer concrete retaining wall is poured on the inner wall of hole.But drift sand formation is frequently encountered during borehole, since drift sand formation is more open And having infiltration, common retaining wall can not pour, and easily cave in even if poured, not only make normal borehole construction can not be into Row, is also easy to cause safety accident.
It constructs currently for the borehole with geological conditions such as drift sand formations, the general side for using high-pressure slip-casting method or bar planting Method reinforces drift sand formation.High-Pressure Grouting Method be stake holes surrounding from surface drilling pass through drift sand formation, then from drilling Lower steel floral tube (surrounding of steel pipe is drilled with some apertures) carries out slip casting so that the drift sand formation around stake holes be consolidated into one it is closely knit It is whole, so as to ensure borehole safety work working properly.It will be apparent that using High-Pressure Grouting Method, need equipment more, cost also compared with Height, and it is long in time limit, influence construction speed.And the method for bar planting, often due to reinforcing bar rigidity is inadequate, it is easily bent, retaining wall effect Also it is not satisfactory.
Invention content
The purpose of the present invention is to provide a kind of pile foundation drilling construction method under drift sand formation geological conditions, to this While geological disaster effectively prevent and block, construction efficiency can be improved, it is cost-effective.
The particular content of the present invention is as follows:
(1) artificial digging pile earthwork 1m left and right deeply, artificial digging pile walling crib of constructing are excavated;
(2) certain depth (being usually no more than 1m) is excavated downwards, pours one layer of reinforced concrete core-tube around stake holes inner wall, such as This cycle carries out;
(3) it when excavating to drift sand formation top close to drift sand formation, is first poured without the retaining wall on drift sand formation upper strata, but edge The base angle of current excavation line, the first layer steel pipe of certain length is hammered around stake holes inner wall, steel pipe is with certain inclination angle to drift sand formation It is inclined outwardly and hammers drift sand formation, and in the reserved certain length in outside;
(4) after the completion of first layer steel pipe, the retaining wall on drift sand formation upper strata is poured, by portion reserved outside first layer steel pipe when pouring Divide and be cast in together in this layer of retaining wall;
(5) and then downwards drift sand formation is excavated, when excavating to certain depth, first layer steel pipe is made to retain certain length still It is embedded in drift sand formation, rest part exposes hole wall, is implanted into again using the intubation construction method described in step (3) to drift sand formation at this time Second layer steel pipe, and the retaining wall casting method as described in step (4), pour drift sand formation retaining wall;
(6) continue to excavate drift sand formation downwards, often excavate certain depth, repeat intubation and retaining wall described in step (5) and pour Method, until passing through drift sand formation.
Above-mentioned construction method further includes following technical characteristic:
(1) it is described to the steel pipe that drift sand formation hammers around stake holes inner wall dense arrangement;
(2) the steel pipe head described in need to be sharpened processing and be convenient for into rock;
(3) retaining wall steel pipe is all constructed to rock stratum, top Welding flat steel, steel pipe dado is made to form an entirety, to carry High entirety lateral pressure resistant ability;
(4) dado thickness poured in drift sand formation is more than the dado thickness of drift sand formation;
(5) present invention to form firm retaining wall so as to pour, can guarantee to cut the earth in hole and make by being inserted into steel pipe to drift sand formation Industry safety, cost is relatively low, and relatively other methods are high at present for construction efficiency, and this method encounters drift sand suitable for pile foundation construction The processing of the geological disasters such as floor, mud and the molten room of karst area.
Description of the drawings
(1) Fig. 1 is the construction process figure of the present invention
(2) Fig. 2 is the geologic structure schematic diagram containing drift sand formation
(3) Fig. 3 is non-drift sand formation pore digging and retaining wall status diagram
(4) Fig. 4 is the stake holes section plan that drift sand formation is inserted into after steel pipe
(5) Fig. 5 is the stake holes sectional view that drift sand formation is inserted into after steel pipe
(6) Fig. 6 is the status diagram after drift sand formation upper strata retaining wall pours
(7) Fig. 7 is the status diagram after the completion of drift sand formation retaining wall pours
Specific embodiment
Below in conjunction with attached drawing, and pass through specific example, the present invention is described in detail:
(1) Fig. 2 show a kind of geologic structure schematic diagram containing drift sand formation, and top is soil layer 1 or rock stratum, and middle part is stream Sand bed 2, lower part are still soil layer or lithosphere.
(2) when proceeding by pore digging after the completion of walling crib, upper soil horizon 1 is constructed by common manually digging hole mode, often Certain depth is excavated, a layer concrete retaining wall 3 is poured on stake holes wall, as shown in Figure 3.
(3) when digging to drift sand formation top close to drift sand formation 2, the retaining wall on drift sand formation top wouldn't be poured, first along currently opening The base angle of line is dug, beats the first layer steel pipe of certain length into drift sand formation 2 around stake holes inner wall.Steel pipe is largely implanted into drift sand formation In 2, but outside will reserve certain length, as shown in Figure 4, Figure 5.
(4) steel pipe should be inserted into drift sand formation with certain angle of inclination to stake holes wall outer incline.As a kind of preferred embodiments, this inclines Rake angle can be between 5 ° to 10 °.Certainly it is less than the angular range, if inclination angle is for 3 ° to 5 ° or more than the angular range, such as 10 ° to 15 °, the method for the present invention can still be realized, depending on soil property situation.
(5) length of steel pipe is suitably determined according to the height of every layer of retaining wall 3, but its length should be greater than retaining wall height.When every When layer retaining wall is higher, steel pipe will be lengthened suitably, and when retaining wall height is relatively low, length of steel pipe can suitably shorten.As a kind of specific Example, when retaining wall height is 90~100cm or so, length of steel pipe can be 130cm, be inserted into drift sand formation 115cm, and outside is reserved 15cm。
(6) to the steel pipe of drift sand formation insertion around stake holes inner wall dense arrangement.After drift sand formation shown in Figure 4 is inserted into steel pipe The section plan of stake holes.Fig. 5 is the stake holes sectional view that drift sand formation is inserted into after steel pipe, can be more clearly visible that and be inserted into steel pipe Arrangement architecture.
(7) steel pipe is beaten by artificial (or machinery) is inserted into drift sand formation.
(8) after the completion of first layer steel pipe beats work, -30 × 5mm band steels are welded on steel pipe top, joint steel pipe is into whole Body, then pour the retaining wall on drift sand formation top, has to steel pipe being reserved in outer part when pouring and is poured into retaining wall, sees Fig. 6 It is shown, it can be seen that steel pipe some be cast in retaining wall 3.
(9) after the completion of the retaining wall on drift sand formation top pours, start the excavation of drift sand formation, excavate and control in certain depth, make The steel pipe that a part is beaten into drift sand formation exposes hole wall, and the steel pipe of certain length is kept still to be embedded in drift sand formation.Steel pipe at this time One temporary support is formed by part fixed in fixed part in the retaining wall of drift sand formation upper strata and lower part drift sand formation.Stop at this time It only excavates, by above-mentioned intubation procedure, second layer steel pipe is beaten into drift sand formation.
(10) after the completion of the construction of second layer steel pipe, drift sand formation retaining wall is poured by above-mentioned retaining wall casting method.To ensure drift sand Layer retaining wall is secured, and the thickness of drift sand formation retaining wall is greater than the thickness of non-drift sand formation retaining wall.As shown in Figure 7.
(11) flow of retaining wall, cycle construction, until passing through drift sand formation are excavated, are intubated, pouring by above-mentioned drift sand formation.Into After the non-drift sand formation in lower part, continue by common pore digging and the construction of retaining wall casting method.

Claims (9)

1. the small steel pipe dado reinforced construction method of artificial digging pile drift sand formation, which is characterized in that include the following steps:
(1) artificial digging pile earthwork 1m left and right deeply, artificial digging pile walling crib of constructing are excavated;
(2) certain depth (being usually no more than 1m) is excavated downwards, is poured one layer of reinforced concrete core-tube around stake holes inner wall, is so followed Ring carries out;
(3) it when excavating to drift sand formation top close to drift sand formation, is first poured without the retaining wall on drift sand formation upper strata, but along current The base angle of excavation line, the first layer steel pipe of certain length is hammered around stake holes inner wall to drift sand formation, and steel pipe is outside with certain inclination angle Inclination hammers drift sand formation, and in the reserved certain length in outside;
(4) after the completion of first layer steel pipe, the retaining wall on drift sand formation upper strata is poured, by reserved part one outside first layer steel pipe when pouring And it is cast in this layer of retaining wall;
(5) and then downwards drift sand formation is excavated, when excavating to certain depth, first layer steel pipe is made to retain certain length and is still embedded in In drift sand formation, rest part exposes hole wall, is implanted into second to drift sand formation using the intubation construction method described in step (3) again at this time Layer steel pipe, and the retaining wall casting method as described in step (4), pour drift sand formation retaining wall;
(6) continue to excavate drift sand formation downwards, often excavate certain depth, repeat intubation and retaining wall casting method described in step (5), Until passing through drift sand formation.
2. according to the method described in claim 1, it is characterized in that:The steel pipe being implanted into drift sand formation is around the intensive row of stake holes inner wall Row.
3. according to the method described in claim 1, it is characterized in that:The steel pipe is 32mm minor-diameter steel-tubes.
4. according to the method described in claim 1, it is characterized in that:Beaten to the steel pipe that drift sand formation hammers by artificial (machinery) It buries, steel pipe end of burying needs to sharpen.
5. according to the method described in claim 1, it is characterized in that:Steel pipe top along steel-pipe welding together 30 × 5mm it is flat Steel, for strengthening the globality of steel pipe.
6. according to the method described in claim 2, it is characterized in that:In the step (3), steel pipe with 5 ° to 10 ° of inclination angle to Outer incline is inserted into drift sand formation.
7. according to the method described in claim 2, it is characterized in that:In the step (3), the length of steel pipe is 130cm, is inserted into Drift sand formation 115cm, the reserved 15cm in outside.
8. according to the method described in claim 6, it is characterized in that:In the step (5), when excavating drift sand formation downwards, expose The length of steel pipe of hole wall is 80cm, and it is 35cm to keep the length of steel pipe being embedded in drift sand formation.
9. according to the method described in claim 1, it is characterized in that:The thickness of drift sand formation retaining wall is more than the thickness of non-drift sand formation retaining wall Degree.
CN201611271931.0A 2016-12-27 2016-12-27 The small steel pipe dado reinforced construction method of artificial digging pile drift sand formation CN108239986A (en)

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CN201611271931.0A CN108239986A (en) 2016-12-27 2016-12-27 The small steel pipe dado reinforced construction method of artificial digging pile drift sand formation

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109518684A (en) * 2018-11-15 2019-03-26 五冶集团上海有限公司 A kind of artificial digging pile drift sand formation steel pipe dado reinforced construction method
CN110185386A (en) * 2019-06-27 2019-08-30 四川公路桥梁建设集团有限公司 A kind of incompact-deposit bodies stratum concrete guard wall rotary digging fast pore-creating method
CN110258551A (en) * 2019-06-27 2019-09-20 四川公路桥梁建设集团有限公司 A kind of vertical ductule pipe curtain supporting construction of friction pile pore digging and construction method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102953373A (en) * 2012-11-23 2013-03-06 中冶集团武汉勘察研究院有限公司 Construction method for manual digging filling pile under quick sand condition
CN103031839A (en) * 2013-01-10 2013-04-10 中铁七局集团第三工程有限公司 Construction method of hand-dug piles
US9255476B2 (en) * 2012-08-17 2016-02-09 Ric-Man Construction, Inc. Shaft construction in the earth and method thereof
CN105464074A (en) * 2015-11-22 2016-04-06 合肥工业大学 Manual hole digging pile high polymer grouting protection structure and construction method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9255476B2 (en) * 2012-08-17 2016-02-09 Ric-Man Construction, Inc. Shaft construction in the earth and method thereof
CN102953373A (en) * 2012-11-23 2013-03-06 中冶集团武汉勘察研究院有限公司 Construction method for manual digging filling pile under quick sand condition
CN103031839A (en) * 2013-01-10 2013-04-10 中铁七局集团第三工程有限公司 Construction method of hand-dug piles
CN105464074A (en) * 2015-11-22 2016-04-06 合肥工业大学 Manual hole digging pile high polymer grouting protection structure and construction method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109518684A (en) * 2018-11-15 2019-03-26 五冶集团上海有限公司 A kind of artificial digging pile drift sand formation steel pipe dado reinforced construction method
CN110185386A (en) * 2019-06-27 2019-08-30 四川公路桥梁建设集团有限公司 A kind of incompact-deposit bodies stratum concrete guard wall rotary digging fast pore-creating method
CN110258551A (en) * 2019-06-27 2019-09-20 四川公路桥梁建设集团有限公司 A kind of vertical ductule pipe curtain supporting construction of friction pile pore digging and construction method

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Application publication date: 20180703