CN104863120B - Occlusive pile construction method and prefabricated occlusive piles used for method - Google Patents
Occlusive pile construction method and prefabricated occlusive piles used for method Download PDFInfo
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- CN104863120B CN104863120B CN201510240262.XA CN201510240262A CN104863120B CN 104863120 B CN104863120 B CN 104863120B CN 201510240262 A CN201510240262 A CN 201510240262A CN 104863120 B CN104863120 B CN 104863120B
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Abstract
The invention discloses an occlusive pile construction method and prefabricated occlusive piles used for the method. The occlusive pile construction method comprises the steps that (1), the prefabricated occlusive piles are manufactured, and occlusion notches are manufactured on two sides of each prefabricated occlusive pile respectively; (2), a first prefabricated occlusive pile hole is formed by drilling on a construction site, the first prefabricated occlusive pile is installed in a hoisting mode, a second prefabricated occlusive pile hole is formed in the position away from the first prefabricated occlusive pile hole by one pile-forming interval in a drilling mode, and the second prefabricated occlusive pile is installed in a hoisting mode; (3), a hole is drilled between the first prefabricated occlusive pile and the second prefabricated occlusive pile and poured with the first cast-in-place occlusion pile; (4), a third prefabricated occlusive pile hole is formed in the position away from the second prefabricated occlusive pile hole by one pile-forming interval in a drilling mode, and the third prefabricated occlusive pile is installed in a hoisting mode; (5), a hole is drilled between the second prefabricated occlusive pile and the third prefabricated occlusive pile and poured with the second cast-in-place occlusion pile; (6), the prefabricated occlusive piles and the cast-in-place occlusion piles are alternately constructed according to the construction sequence of the prefabricated occlusive piles and the cast-in-place occlusion piles till construction is finished.
Description
Technical field
The present invention relates to the realm of building construction, refers in particular to a kind of construction method of interlocking pile and stings for the prefabricated of the method
Close stake.
Background technology
Interlocking pile is that a kind of foundation pit enclosure structure for being mutually twisted arrangement is formed between stake and stake.Stake arrangement mode be
One not arrangement of reinforcement and using extra retarded set plain concrete pile (A stakes) and reinforced concrete pile (B stakes) arranged for interval, A stakes, B stakes
Constructed using all casing drill, the concrete that adjacent A stakes intersection is cut away after A pile driving constructions are complete is constructed again B stakes, so as to reality
Existing A stakes are engaged with B stakes.During construction, A stakes of first constructing, B stakes of constructing afterwards completed the construction of B stakes before the initial set of A pile concretes.
Specifically, coordinate and refer to Fig. 1, Fig. 1 is the construction process figure of the interlocking pile of prior art.As shown in figure 1, during construction, first constructing
A1 stakes, then A2 stakes of constructing, cut away the concrete of A1 stakes, A2 stakes and B1 stake intersections, B1 stakes of then constructing again, make B1 stakes with
A1 stakes, A2 stakes occlusion, then construct successively by this method.
At present interlocking pile has been a kind of common pit maintenance soil form in engineering, but because the height of underground engineering is answered
The restriction of polygamy and construction technology, has when interlocking pile occurs broken pile, folder mud, is engaged the accident of failure leak during practice of construction
Occur.And be likely to affect to be engaged effect due to scale error when extra retarded set plain concrete pile (A stakes) is cut off.
The content of the invention
In view of the problems referred to above, the invention provides a kind of construction method of interlocking pile, including：
(1) prefabricated interlocking pile is made, relative two sidepieces in the prefabricated interlocking pile make respectively occlusion breach, make
The occlusion breach matches with the pile body structure of cast-in-place interlocking pile to be onstructed；
(2) at the construction field (site) drilling forms first prefabricated occlusion stake holes and in described first prefabricated occlusion stake holes infantile tic
Fill first prefabricated interlocking pile, at a distance of described first it is prefabricated occlusion one one-tenth pile spacing of stake holes at drill to be formed second it is prefabricated
Occlusion stake holes simultaneously fills second prefabricated interlocking pile in described second prefabricated occlusion stake holes infantile tic；
(3) first is drilled and carried out between first prefabricated interlocking pile and second prefabricated interlocking pile now
Pour pouring for interlocking pile, form first cast-in-place interlocking pile, the both sides of first cast-in-place interlocking pile are respectively with described first
The occlusion breach of individual prefabricated interlocking pile and the occlusion breach of second prefabricated interlocking pile are mutually twisted；
(4) drilling to form the 3rd prefabricated occlusion stake holes at described second prefabricated occlusion one one-tenth pile spacing of stake holes
And fill the 3rd prefabricated interlocking pile in described 3rd prefabricated occlusion stake holes infantile tic；
(5) second is drilled and carried out between second prefabricated interlocking pile and the 3rd prefabricated interlocking pile now
Pour pouring for interlocking pile, form second cast-in-place interlocking pile, the both sides of second cast-in-place interlocking pile are respectively with described second
The occlusion breach of individual prefabricated interlocking pile and the occlusion breach of the 3rd prefabricated interlocking pile are mutually twisted；
(6) according to above-mentioned prefabricated interlocking pile and the sequence of construction of cast-in-place interlocking pile, alternating is constructed prefabricated interlocking pile and cast-in-place
Interlocking pile, until construction is finished.
The construction method of interlocking pile of the present invention, by making prefabricated interlocking pile, in relative two sidepieces of prefabricated interlocking pile
Formed respectively and be engaged breach with the pile body structure of cast-in-place interlocking pile matches, need not be to cast-in-place when occlusion pile driving construction is carried out
Interlocking pile is cut just can be directly engaged with prefabricated interlocking pile, when saving the material of cutting tip, artificial, construction
Between and cutting apparatus, and can preferably ensure construction quality.
Construction method of interlocking pile of the present invention further improvement is that, when making the prefabricated interlocking pile, described prefabricated
The middle part of interlocking pile opens up through hole along the axial direction of the prefabricated interlocking pile.
Further improvement is that for construction method of interlocking pile of the present invention, when making the prefabricated interlocking pile sectional making is adopted
Mode the prefabricated interlocking pile is fabricated to into multiple segmentation pile bodies, by multiple segmentation stakes when lifting the prefabricated interlocking pile
Body is spliced to form the prefabricated interlocking pile by the way of segmental hoisting.
Construction method of interlocking pile of the present invention further improvement is that, when making the segmentation pile body, in the segmentation stake
The middle part of body opens up through hole along the axial direction of the segmentation pile body, inner core steel pipe is arranged in the through hole of the segmentation pile body, in institute
The outer layer for stating segmentation pile body arranges steel plate.
Construction method of interlocking pile of the present invention further improvement is that, when lifting the prefabricated interlocking pile, first by adjacent two
The inner core steel pipe of the individual segmentation pile body is welded, then the steel plate of the two neighboring segmentation pile body is welded.
Present invention also offers a kind of prefabricated interlocking pile, for being mutually twisted with cast-in-place interlocking pile when pile driving construction is engaged,
Two sidepieces relative in the prefabricated interlocking pile are respectively formed with occlusion breach, the occlusion breach and the cast-in-place interlocking pile
Pile body structure match.
The prefabricated interlocking pile of the present invention, is formed respectively and cast-in-place interlocking pile by relative two sidepieces in prefabricated interlocking pile
The occlusion breach that matches of pile body structure, cast-in-place interlocking pile need not be cut when occlusion pile driving construction is carried out just can be with
Directly it is engaged with prefabricated interlocking pile, is saved material, artificial, engineering time and the cutting apparatus of cutting tip, and
Construction quality can preferably be ensured.
Further improvement is that for prefabricated interlocking pile of the invention, is formed with along described prefabricated in the middle part of the prefabricated interlocking pile
The through hole that the axial direction of interlocking pile opens up.
Prefabricated interlocking pile of the invention further improvement is that the prefabricated interlocking pile is by the splicing of multiple segmentation pile bodies
Into any one described segmentation in the middle part of pile body is formed with the through hole opened up along the axial direction of the segmentation pile body.
Further improvement is that for prefabricated interlocking pile of the invention, in the through hole of the segmentation pile body inner core steel pipe is provided with,
The outer layer of the segmentation pile body is provided with steel plate.
Prefabricated interlocking pile of the invention further improvement is that the cast-in-place interlocking pile is cylindrical stake, the occlusion lacks
Mouthful be shaped as arcwall face.
Description of the drawings
Fig. 1 is the construction process figure of the interlocking pile of prior art.
Fig. 2 is the structural representation of prefabricated interlocking pile of the invention.
Fig. 3 is the preferred embodiment schematic diagram of prefabricated interlocking pile of the invention.
Fig. 4 is the flow chart of construction method of interlocking pile of the present invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
Coordinate referring to shown in Fig. 2, Fig. 2 is the structural representation of prefabricated interlocking pile of the invention.As shown in Fig. 2 the present invention
Prefabricated interlocking pile, for being mutually twisted with cast-in-place interlocking pile when pile driving construction is engaged, two sides relative in prefabricated interlocking pile 10
Portion is respectively formed with occlusion breach 110, and occlusion breach 110 matches with the pile body structure of the cast-in-place interlocking pile.In such as Fig. 2 institutes
In the embodiment shown, the cast-in-place interlocking pile is cylindrical stake, and the occlusion breach 110 of prefabricated interlocking pile 10 is shaped as arc
Arcwall face, the other both sides of prefabricated interlocking pile 10 for outer arcuate arcwall face 120.Preferably, prefabricated interlocking pile 10 is reinforcing bar
Concrete-pile, the cast-in-place interlocking pile is extra retarded set plain concrete pile.
Coordinate refering to shown in Fig. 3, Fig. 3 is the preferred embodiment schematic diagram of prefabricated interlocking pile of the invention.As shown in figure 3,
In the preferred embodiment of the prefabricated interlocking pile of the present invention, the middle part of prefabricated interlocking pile 10 is formed with opens along the axial direction of prefabricated interlocking pile 10
If through hole 130.Preferably, through hole 130 is manhole.Through hole 130 can mitigate the deadweight of prefabricated interlocking pile 10, and save
About concrete amount, while being also convenient for lifting operation.
Further, prefabricated interlocking pile 10 can be spliced by multiple segmentation pile bodies, the middle part of each segmentation pile body
The through hole opened up along the axial direction of segmentation pile body is each formed with, each segmentation pile body is spliced to form prefabricated interlocking pile 10, is respectively segmented pile body
On through hole be also interconnected to form the through hole 130 of prefabricated interlocking pile 10.Preferably, it is additionally provided with the through hole of each segmentation pile body
Inner core steel pipe, the outer layer of each segmentation pile body is additionally provided with steel plate, is easy to that each segmentation pile body is lifted and spliced.
The prefabricated interlocking pile of the present invention, is formed respectively and cast-in-place interlocking pile by relative two sidepieces in prefabricated interlocking pile
The occlusion breach that matches of pile body structure, cast-in-place interlocking pile need not be cut when occlusion pile driving construction is carried out just can be with
Directly it is engaged with prefabricated interlocking pile, is saved material, artificial, engineering time and the cutting apparatus of cutting tip, and
Construction quality can preferably be ensured.
Present invention also offers a kind of construction method of interlocking pile, including：
(1) prefabricated interlocking pile is made, relative two sidepieces in the prefabricated interlocking pile make respectively occlusion breach, make
The occlusion breach matches with the pile body structure of cast-in-place interlocking pile to be onstructed；
(2) at the construction field (site) drilling forms first prefabricated occlusion stake holes and in described first prefabricated occlusion stake holes infantile tic
Fill first prefabricated interlocking pile, at a distance of described first it is prefabricated occlusion one one-tenth pile spacing of stake holes at drill to be formed second it is prefabricated
Occlusion stake holes simultaneously fills second prefabricated interlocking pile in described second prefabricated occlusion stake holes infantile tic；
(3) first is drilled and carried out between first prefabricated interlocking pile and second prefabricated interlocking pile now
Pour pouring for interlocking pile, form first cast-in-place interlocking pile, the both sides of first cast-in-place interlocking pile are respectively with described first
The occlusion breach of individual prefabricated interlocking pile and the occlusion breach of second prefabricated interlocking pile are mutually twisted；
(4) drilling to form the 3rd prefabricated occlusion stake holes at described second prefabricated occlusion one one-tenth pile spacing of stake holes
And fill the 3rd prefabricated interlocking pile in described 3rd prefabricated occlusion stake holes infantile tic；
(5) second is drilled and carried out between second prefabricated interlocking pile and the 3rd prefabricated interlocking pile now
Pour pouring for interlocking pile, form second cast-in-place interlocking pile, the both sides of second cast-in-place interlocking pile are respectively with described second
The occlusion breach of individual prefabricated interlocking pile and the occlusion breach of the 3rd prefabricated interlocking pile are mutually twisted；
(6) according to above-mentioned prefabricated interlocking pile and the sequence of construction of cast-in-place interlocking pile, alternating is constructed prefabricated interlocking pile and cast-in-place
Interlocking pile, until construction is finished.
Wherein, prefabricated interlocking pile is preferably reinforced concrete pile, and it is mixed that the cast-in-place interlocking pile is preferably extra retarded set element
Solidifying soil stake, the prefabricated interlocking pile can be prefabricated in the factory and complete.When making the prefabricated interlocking pile, in the prefabricated interlocking pile
Middle part open up through hole along the axial direction of the prefabricated interlocking pile, the deadweight of prefabricated interlocking pile can be mitigated, and save concrete
Consumption, while being also convenient for lifting operation.In order to mitigate the requirement lifted to crane and live place, the prefabricated interlocking pile is made
The prefabricated interlocking pile is fabricated to multiple segmentation pile bodies by the mode of Shi Caiyong sectional makings, will during the lifting prefabricated interlocking pile
Multiple segmentation pile bodies are spliced to form the prefabricated interlocking pile by the way of segmental hoisting.Further, divide for convenience
The lifting of section pile body, when making the segmentation pile body, opens up at the middle part of the segmentation pile body along the axial direction of the segmentation pile body
Through hole, in the through hole of the segmentation pile body inner core steel pipe is arranged, and in the outer layer of the segmentation pile body steel plate is arranged, and lifting is described
During prefabricated interlocking pile, first the inner core steel pipe of the two neighboring segmentation pile body is welded, then by the two neighboring segmentation
The steel plate of pile body is welded.
It is described in detail below in conjunction with construction method of interlocking pile of the accompanying drawing to the present invention also.Coordinate refering to shown in Fig. 4, scheme
4 is the flow chart of construction method of interlocking pile of the present invention.As shown in figure 4, the construction method of interlocking pile of the present invention is concretely comprised the following steps：
It is prefabricated in the factory and completes the making of prefabricated interlocking pile, first banding steel cage after-pouring concrete is preliminarily formed prefabricated
Interlocking pile；Then relative two sidepieces in the prefabricated interlocking pile make to form occlusion breach respectively, make the occlusion breach
Match with the pile body structure of cast-in-place interlocking pile to be onstructed；Open up logical along the axial direction of segmentation pile body at the middle part of each segmentation pile body
Hole, in the through hole of each segmentation pile body inner core steel pipe is arranged, and in the outer layer of each segmentation pile body steel plate is arranged；
The each segmentation pile body for completing is transported to into job site, drilling at the construction field (site) forms first prefabricated interlocking pile
Hole and second prefabricated occlusion stake holes；
First prefabricated interlocking pile B1 is lifted respectively in first prefabricated occlusion stake holes and second prefabricated occlusion stake holes
With second prefabricated interlocking pile B2, during lifting, first the inner core steel pipe of the two neighboring segmentation pile body is welded, then by phase
The steel plate of adjacent two segmentation pile bodies is welded；
The drilling between first prefabricated interlocking pile B1 and second prefabricated interlocking pile B2 carries out first cast-in-place interlocking pile
A1's pours, and respectively interlocking pile B1 prefabricated with first is engaged breach and second for the both sides of first cast-in-place interlocking pile A1
The occlusion breach of prefabricated interlocking pile B2 is mutually twisted；
The 3rd prefabricated occlusion stake holes is formed drilling at second prefabricated occlusion one one-tenth pile spacing of stake holes and in institute
State the 3rd prefabricated occlusion stake holes infantile tic and fill the 3rd prefabricated interlocking pile B3；
Second cast-in-place occlusion is drilled and carried out between second prefabricated interlocking pile B2 and the 3rd prefabricated interlocking pile B3
Stake A2 is poured, and respectively interlocking pile B2 prefabricated with second is engaged breach and the 3rd for the both sides of second cast-in-place interlocking pile A2
The occlusion breach of individual prefabricated interlocking pile B3 is mutually twisted；
So cycle alternation construction A stakes and B stakes, finishes until being engaged pile driving construction.
The construction method of interlocking pile of the present invention, by making prefabricated interlocking pile, in relative two sidepieces of prefabricated interlocking pile
Formed respectively and be engaged breach with the pile body structure of cast-in-place interlocking pile matches, need not be to cast-in-place when occlusion pile driving construction is carried out
Interlocking pile is cut just can be directly engaged with prefabricated interlocking pile, when saving the material of cutting tip, artificial, construction
Between and cutting apparatus, and can preferably ensure construction quality.
The above is only presently preferred embodiments of the present invention, and any pro forma restriction is not done to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
Member, in the range of without departing from technical solution of the present invention, when using the technology contents of the disclosure above make it is a little change or repair
The Equivalent embodiments for equivalent variations are adornd, as long as being the content without departing from technical solution of the present invention, according to the technology reality of the present invention
Any simple modification, equivalent variations and modification that confrontation above example is made, still fall within the scope of technical solution of the present invention
It is interior.
Claims (7)
1. a kind of construction method of interlocking pile, it is characterised in that include：
(1) prefabricated interlocking pile is made, the prefabricated interlocking pile is reinforced concrete pile, relative two in the prefabricated interlocking pile
Individual sidepiece makes respectively occlusion breach, makes the occlusion breach match with the pile body structure of cast-in-place interlocking pile to be onstructed；
(2) at the construction field (site) drilling forms first prefabricated occlusion stake holes and fills the in described first prefabricated occlusion stake holes infantile tic
One prefabricated interlocking pile, is drilling to form second prefabricated occlusion at described first prefabricated occlusion one one-tenth pile spacing of stake holes
Stake holes simultaneously fills second prefabricated interlocking pile in described second prefabricated occlusion stake holes infantile tic；
(3) first is drilled and carried out between first prefabricated interlocking pile and second prefabricated interlocking pile cast-in-place to sting
Pouring for stake is closed, first cast-in-place interlocking pile is formed, the cast-in-place interlocking pile is extra retarded set plain concrete pile, and described first existing
Pour the both sides of interlocking pile and be engaged breach and second prefabricated interlocking pile with first prefabricated interlocking pile respectively
Occlusion breach is mutually twisted；
(4) at a distance of described second it is prefabricated occlusion one one-tenth pile spacing of stake holes at drill to be formed the 3rd it is prefabricated occlusion stake holes and
The 3rd prefabricated occlusion stake holes infantile tic fills the 3rd prefabricated interlocking pile；
(5) second is drilled and carried out between second prefabricated interlocking pile and the 3rd prefabricated interlocking pile cast-in-place to sting
Pouring for stake is closed, second cast-in-place interlocking pile is formed, the both sides of second cast-in-place interlocking pile are pre- with described second respectively
The occlusion breach of interlocking pile processed and the occlusion breach of the 3rd prefabricated interlocking pile are mutually twisted；
(6) according to above-mentioned prefabricated interlocking pile and the sequence of construction of cast-in-place interlocking pile, construct prefabricated interlocking pile and cast-in-place occlusion are replaced
Stake, until construction is finished.
2. construction method of interlocking pile as claimed in claim 1, it is characterised in that when making the prefabricated interlocking pile, described
The middle part of prefabricated interlocking pile opens up through hole along the axial direction of the prefabricated interlocking pile.
3. construction method of interlocking pile as claimed in claim 1, it is characterised in that using segmentation when making the prefabricated interlocking pile
The prefabricated interlocking pile is fabricated to multiple segmentation pile bodies by the mode of making, will be multiple described point during the lifting prefabricated interlocking pile
Section pile body is spliced to form the prefabricated interlocking pile by the way of segmental hoisting.
4. construction method of interlocking pile as claimed in claim 3, it is characterised in that when making the segmentation pile body, at described point
The middle part of section pile body opens up through hole along the axial direction of the segmentation pile body, and in the through hole of the segmentation pile body inner core steel pipe is arranged,
In the outer layer of the segmentation pile body, steel plate is set.
5. construction method of interlocking pile as claimed in claim 4, it is characterised in that when lifting the prefabricated interlocking pile, first by phase
The inner core steel pipe of adjacent two segmentation pile bodies is welded, then the steel plate of the two neighboring segmentation pile body is welded.
6. a kind of prefabricated interlocking pile, for being mutually twisted with cast-in-place interlocking pile when pile driving construction is engaged, it is characterised in that described pre-
The through hole opened up along the axial direction of the prefabricated interlocking pile is formed with the middle part of interlocking pile processed, relative two in the prefabricated interlocking pile
Individual sidepiece is respectively formed with occlusion breach, and the occlusion breach matches with the pile body structure of the cast-in-place interlocking pile；It is described pre-
Interlocking pile processed is reinforced concrete pile, and the cast-in-place interlocking pile is extra retarded set plain concrete pile；
The prefabricated interlocking pile is spliced by multiple segmentation pile bodies, is formed with along described in the middle part of any one described segmentation pile body
The through hole that the axial direction of segmentation pile body opens up, is provided with inner core steel pipe, outside the segmentation pile body in the through hole of the segmentation pile body
Layer is provided with steel plate.
7. prefabricated interlocking pile as claimed in claim 6, it is characterised in that the cast-in-place interlocking pile is cylindrical stake, described to sting
That closes breach is shaped as arcwall face.
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| CN201510240262.XA CN104863120B (en) | 2015-05-13 | 2015-05-13 | Occlusive pile construction method and prefabricated occlusive piles used for method |
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| CN201510240262.XA CN104863120B (en) | 2015-05-13 | 2015-05-13 | Occlusive pile construction method and prefabricated occlusive piles used for method |
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| CN105862876A (en) * | 2016-05-19 | 2016-08-17 | 邱树贵 | Concrete continuous pile, concrete continuous pile wall and construction method of concrete continuous pile wall |
| CN107989032A (en) * | 2017-11-28 | 2018-05-04 | 深圳市工勘岩土技术有限公司 | A kind of construction method of punching interlocking pile |
| CN109056740B (en) * | 2018-08-03 | 2020-04-07 | 浙江大学城市学院 | Construction method for judging whether secant pile is secant or not |
| CN114319330A (en) * | 2022-01-12 | 2022-04-12 | 中煤江南建设发展集团有限公司 | Occlusive pile, sleeve for occlusive pile plain pile and construction method of sleeve |
| CN114718057B (en) * | 2022-05-23 | 2023-12-26 | 中交二公局萌兴工程有限公司 | Secant pile unit, partition wall and construction process thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1209490A (en) * | 1997-08-22 | 1999-03-03 | 黄嘉雄 | C-shaped pile and method of setting up piles using C-shaped piles to construct gang-piles |
| JP2005146733A (en) * | 2003-11-18 | 2005-06-09 | Marutoku Kigyo:Kk | Cast-in-place pile wall construction method |
| CN200964585Y (en) * | 2006-04-12 | 2007-10-24 | 昆明捷程桩工有限责任公司 | All-bushing perfusion stake bitten cement earth stake |
| CN102011397B (en) * | 2010-11-09 | 2012-07-25 | 中安泰达建设发展(北京)有限公司 | Construction process of concrete form water-stopping occlusion pile |
| CN104278679A (en) * | 2013-07-01 | 2015-01-14 | 上海城地建设股份有限公司 | Envelope structure combining five (six) shaft mixing piles with precast tubular piles and construction method |
| CN104088275A (en) * | 2014-05-15 | 2014-10-08 | 大连大金马基础建设有限公司 | Prestressed concrete secant pile and construction method thereof |
| CN104164871B (en) * | 2014-07-10 | 2016-06-01 | 大连大金马基础建设有限公司 | The constructional method of the two recessed occlusion water-seal pile of supporting |
| CN104088285A (en) * | 2014-07-24 | 2014-10-08 | 上海强劲地基工程股份有限公司 | Method for constructing cement soil mixing pile and concrete pile meshed foundation pit supporting structure |
| 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 |
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