CN107034894A - Post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile and preparation method thereof and construction method - Google Patents
Post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile and preparation method thereof and construction method Download PDFInfo
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- CN107034894A CN107034894A CN201710171396.XA CN201710171396A CN107034894A CN 107034894 A CN107034894 A CN 107034894A CN 201710171396 A CN201710171396 A CN 201710171396A CN 107034894 A CN107034894 A CN 107034894A
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- 238000010276 construction Methods 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 210000002435 tendon Anatomy 0.000 claims abstract description 56
- 210000003205 muscle Anatomy 0.000 claims abstract description 12
- 206010021118 Hypotonia Diseases 0.000 claims abstract description 4
- 208000017561 flaccidity Diseases 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims description 51
- 239000004568 cement Substances 0.000 claims description 49
- 239000000203 mixture Substances 0.000 claims description 24
- 239000002689 soil Substances 0.000 claims description 23
- 239000011083 cement mortar Substances 0.000 claims description 19
- 238000007569 slipcasting Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000005553 drilling Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 11
- 230000002787 reinforcement Effects 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000012407 engineering method Methods 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000000295 complement effect Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 238000012795 verification Methods 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000009885 systemic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/30—Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/58—Prestressed concrete piles
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile and preparation method thereof and construction method.The pattern foundation pit supporting structure prefabricated pile cross section is T-shaped, the T-shaped top of pattern foundation pit supporting structure prefabricated pile and T-shaped bottom are vertically arranged with prestressing force beam hole, the prestressing force beam hole wears prestressing tendon, the pattern foundation pit supporting structure prefabricated pile also includes joint, construction muscle and stirrup, the joint is located at the two ends of pattern foundation pit supporting structure prefabricated pile, the construction flaccidity of tendon and muscle is to being arranged in pattern foundation pit supporting structure prefabricated pile, and the stirrup is laterally arranged in pattern foundation pit supporting structure prefabricated pile.Present invention construction is simple, low cost；Deep pit monitor is stable, and its pattern foundation pit supporting structure prefabricated pile not only has rigidity but also flexible, it may have very strong bending resistance, shear resistance.Therefore, pattern foundation pit supporting structure prefabricated pile cost performance of the present invention is high, is easy to construct and safeguards, deep pit monitor is stable, and service life is long.
Description
Technical field
The present invention relates to a kind of pattern foundation pit supporting structure prefabricated pile, i.e. PRP, more particularly to a kind of post-tensioned prestressed tension beam is recyclable
Formula pattern foundation pit supporting structure prefabricated pile and preparation method thereof and construction method.
Background technology
Prior art prefabricated pile includes following two stakes and its construction method：
One kind is SMW（Soil Mixing Wall）Engineering method stake, refers to fountain type drilling mixer at the scene to certain depth
Drilling is carried out, while spraying cement system's hardening agent at drill bit and being mixed repeatedly with foundation soil, between each construction cell
Then take overlapping lapping construction, then soil cement mixture do not tie it is hard before insertion steel or steel plate as its stress reinforcing material, extremely
Cement knot is hard, forms underground wall body.There is following defect in this method：
1st, construction costs is high：It is to belong to lease property, cost performance is higher over a period to come, but exceedes after leasing period, its foundation ditch
Engineering support infrastructure cost will progressively increase day by day.
2nd, rigidity is low：Bending resistance square is small, anti-shearing small, and base pit stability is poor.
Another method is concrete drilling bored concrete pile：Refer to pass through machine drilling, steel pipe soil compaction or people in engineering site
Power the means such as excavates and forms stake holes in foundation soil, and places in it steel reinforcement cage, concrete perfusion and the stake made.This method
There is following defect：
1st, cost is high：Construction costs is high, cost performance is low
2nd, it is long in time limit：Construction period is longer, has a strong impact on engineering total lever factor.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure
Prefabricated pile.Therefore, the present invention provides following technical scheme：
Post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile, it is characterised in that the pattern foundation pit supporting structure prefabricated pile is horizontal
Section is T-shaped, and the T-shaped top of pattern foundation pit supporting structure prefabricated pile and T-shaped bottom are vertically arranged with prestressing force beam hole, described
Prestressing force beam hole wears prestressing tendon, and the pattern foundation pit supporting structure prefabricated pile also includes joint, construction muscle and stirrup, and the joint is located at
The two ends of pattern foundation pit supporting structure prefabricated pile, the construction flaccidity of tendon and muscle is to being arranged in pattern foundation pit supporting structure prefabricated pile, and the stirrup is laterally arranged in
In pattern foundation pit supporting structure prefabricated pile, longitudinal two ends of the pattern foundation pit supporting structure prefabricated pile are provided with stake end butt junction location pin and positioning hole, described
Longitudinal two ends of pattern foundation pit supporting structure prefabricated pile are provided with component hoisting ring or lifting eye, and the pile body side is provided with spacing neck.Foundation ditch
Supporting prefabricated pile reasonable in design, the arrangement in length and breadth of prestressing tendon, construction muscle and stirrup causes its rigidity big, bending resistance, shearing resistance
Property is greatly improved.
On the basis of using above-mentioned technical proposal, the present invention can also be using technical scheme further below：
Pile grouting is provided with below the T-shaped top of pattern foundation pit supporting structure prefabricated pile, and the superposed prestressing force beam hole
Grouting behind shaft or drift lining body is filled with hole, the pile grouting hole, integrally-built elasticity is added, and can preferably have and expand with heat and contract with cold
Control characteristic.
Prestressing tendon end is provided with prestressing tendon retracting device, and the prestressing tendon retracting device is pre- including being respectively arranged at
The first prestressing tendon trap and the second prestressing tendon trap at stress beam two ends, facilitate prestressing tendon recovery, detection and
Change.
It is provided with outside prestressing tendon outside prestressing tendon sleeve pipe, the prestressing tendon sleeve pipe and is provided with stress beam locking piece,
The setting of sleeve pipe make it that the prestressing tendon in each hole is more accurately installed, and by the lock fit of locking piece, makes
Obtain position needed for the holding that multiple prestressing tendons can be consolidated in the space in hole.
The joint is provided with reinforcement and reinforced pipe.
Longitudinal two ends of the pattern foundation pit supporting structure prefabricated pile are provided with stake end butt junction location pin and positioning hole, and the pattern foundation pit supporting structure is pre-
Longitudinal two ends of stake processed are provided with component hoisting ring or lifting eye.
Grouting behind shaft or drift lining body is filled with the prestressing force beam hole, the formation one that each part can be consolidated.
Present invention additionally comprises the preparation method of post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile, including with
Lower step：
1st, compacting, with flattening pattern foundation pit supporting structure prefabricated pile fabricating yard platform；
2nd, laying pattern foundation pit supporting structure prefabricated pile end template is carried out using integrated form template；
3rd, pattern foundation pit supporting structure prefabricated pile reinforcing bar colligation is carried out；
The 4th, pattern foundation pit supporting structure prefabricated pile built-in fitting and support are installed；
5th, the integrated template encapsulation of pile body both sides；
6th, pattern foundation pit supporting structure prefabricated pile concrete placings shape；
7th, the prefabricated pile body of pattern foundation pit supporting structure is steam-cured：
7.1st, it is synchronous to make the steam-cured test block of concrete；
7.2nd, the steam-cured test block pressure testing of concrete：
7.2.1 the steam-cured test block of concrete, is detected by pressure testing, it is qualified to determine whether；
7.2.2 the sampling observation of pattern foundation pit supporting structure prefabricated pile batch and static load test, are carried out；
If the 8, the steam-cured test block of concrete and sampling static load Two indices are qualified after tested, come into operation, if unqualified, carry out structure benefit
Come into operation, or scrap after strong；
9th, pattern foundation pit supporting structure prefabricated pile prestressing force beam hole inner hole wall is cleared up, it is ensured that unobstructed in prestressing force beam hole；
10th, the lashing prestressing tendon in prestressing force beam hole；
11st, carry out pattern foundation pit supporting structure prefabricated pile and lay construction；
12nd, prestressing tendon tensioning；
12.1st, calculated prestressing force tensioning value；
13rd, sealing off and covering anchorage；
14th, slip casting in prestressing force beam hole；
14.1st, slip casting is cement mortar；
15th, make and form pattern foundation pit supporting structure prefabricated pile.
This construction method is possible in use, by pattern foundation pit supporting structure prefabricated pile and Soil-cement water curtain wall and mixed
Solidifying soil inner support beam structure cooperatively forms overall foundation pit support system；Or with Soil-cement water curtain wall and oblique pull anchor
Cable Structure cooperatively forms overall foundation pit support system.Integral construction is convenient, easy to operate and precision is high, forms firm
, efficient foundation pit support system.
Present invention additionally comprises the construction method of post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile：It is described to apply
Work method is that post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile is inserted to the gear formed in cement earth mixtures
Cob wall, as PRPCW engineering methods, comprise the following steps：
1st, rig drilling, stirring pore-forming：
1.1st, stake site is determined；
1.2nd, high-pressure injection pump churning；
1.2.1, configuration cement mortar；
1.2.2 grouting pump churning pressure, is set；
1.3rd, air pump charged air pressure is set, gases at high pressure are formed；
2nd, the aperture of measurement cement earth mixtures mixing pile pore-forming, hole depth；
3rd, Soil-cement pile or wall：
Churning by rig and water under high pressure mud, gases at high pressure to hole wall surrounding soil is cut, stirring, and formation is mixed by soil cement
The cement earth mixtures mixing pile body of compound, is set gradually to form foundation ditch ground by multiple cement earth mixtures mixing pile bodies
Enclosure wall；
4th, pattern foundation pit supporting structure prefabricated pile is laid；
5th, pattern foundation pit supporting structure prefabricated pile prestressing force beam hole inner hole wall is cleared up, is made unobstructed in prestressing force beam hole；
6th, prestressing tendon is worn：
7th, measurement verification pattern foundation pit supporting structure prefabricated pile has assigned length and perpendicularity；
8th, pattern foundation pit supporting structure prefabricated pile pile grouting；
9th, the post-stretching of pattern foundation pit supporting structure prefabricated pile is locked, i.e., apply prestressing force to pattern foundation pit supporting structure prefabricated pile：
9.1st, test is with age Soil-cement mixture pressure testing bulk strength；
9.1.1, Soil-cement Wall/stake for test block test failure carries out reinforcement or complement soil stirs wall/stake again；
9.2nd, calculated prestressing force tensioning value and record；
10th, slip casting in post-stress beam hole；
11st, construction of prefabricated piles is finished.
12nd, stake internal stress Shu Huishou：
12.1st, after after the completion of power transmission belt construction on the outside of shear wall or after the peripheral backfilling of earthwork of foundation ditch, the recovery anchor of prefabricated pile upper end
Has prestressing force in device unblock, slow release stake.
12.2nd, steel strand wires or deformed bar in PRP are reclaimed
12.3rd, stress Shu Huishou is finished.
It is described to apply present invention additionally comprises the construction method of post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile
Work method is the retaining wall of post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile combination high-pressure rotary jet grouting pile formation, i.e.,
PRPJW engineering methods, comprise the following steps：
1st, excavate rig drilling, excavate pore-forming：
1.1st, unwrapping wire determines stake site；
1.2nd, rig is excavated in place；
1.3rd, the aperture of measurement pore-forming, hole depth：
2nd, pattern foundation pit supporting structure prefabricated pile is laid：
3rd, prestressing tendon is worn：
3.1st, pattern foundation pit supporting structure prefabricated pile prestressing force beam hole inner hole wall is cleared up, is made unobstructed in prestressing force beam hole；
5th, pattern foundation pit supporting structure prefabricated pile pile grouting, the slurry is cement mortar or cement mortar or pea gravel concreten：
Mud soil in pile grouting, former excavated hole is carried out by injected hole reserved before in pattern foundation pit supporting structure prefabricated pile to be replaced as
Concrete bodies or body or cement slurry sets body, make concrete bodies or body or cement slurry sets body and pattern foundation pit supporting structure prefabricated
It is overall that stake forms a firm stress；
5.1st, cement mortar is configured；
6th, pattern foundation pit supporting structure prefabricated pile waterproof between piles stake/wall rotary-spraying construction:
High-pressure spiral jetting diaphragm stake is located between two pattern foundation pit supporting structure prefabricated piles, passes through rig and water under high pressure mud, gases at high pressure device to hole
Wall surrounding soil churning cutting, stirring, formed cement earth mixtures high-pressure rotary-spray pile body, by multiple high-pressure rotary-spray pile bodies according to
Secondary set forms a closed foundation pit waterproof curtain wall（Retaining wall）；
7th, the post-stretching of pattern foundation pit supporting structure prefabricated pile is locked, i.e., apply prestressing force to pattern foundation pit supporting structure prefabricated pile：
7.1, test with age high-pressure rotary jet grouting pile pressure testing bulk strength；
7.1.1, for test block test failure, the high-pressure rotary-spray wall of reply correspondence section（Stake）Carry out reinforcement or again complement；
7.2nd, stretching machine prepares in place；
7.2.1, calculated prestressing force tensioning value；
7.2.2, check and record the prestressed stretch-draw lock value of single pile application；
8th, slip casting in post-stress beam hole；
9th, construction of prefabricated piles is finished.
10th, stake internal stress Shu Huishou：
10.1st, after after the completion of power transmission belt construction on the outside of shear wall or after the peripheral backfilling of earthwork of foundation ditch, the recovery anchor of prefabricated pile upper end
Has prestressing force in device unblock, slow release stake.
10.2nd, steel strand wires or deformed bar in PRP are reclaimed
10.3rd, stress Shu Huishou is finished.
This construction method is possible in use, to prop up in pattern foundation pit supporting structure prefabricated pile and high-pressure rotary jet grouting pile and concrete
The pattern foundation pit supporting structure curtain system that support girder construction is collectively forming, or be collectively forming with high-pressure rotary jet grouting pile and oblique pull anchor cable structure 19
Pattern foundation pit supporting structure curtain system.Integral construction is convenient, easy to operate and precision is high, forms firm, efficient pattern foundation pit supporting structure system
System.And the stress beam of pattern foundation pit supporting structure prefabricated pile is recyclable, after load is released, can quickly it reclaim, it is cost-effective, improve
The efficiency of construction.
Due to using technical scheme, beneficial effects of the present invention are：Present invention construction is simple, low cost, base
Hole is stable, and its pattern foundation pit supporting structure prefabricated pile not only has rigidity but also flexible, it may have very strong bending resistance, shear resistance, therefore, of the invention
Pattern foundation pit supporting structure prefabricated pile cost performance is high, is easy to construct and safeguards, and service life is long.
Stress beam of the present invention is recyclable, cost-effective and be convenient for changing, safeguard.
Brief description of the drawings
Fig. 1 is a kind of pattern foundation pit supporting structure prefabricated pile sectional view that the present invention is provided.
Fig. 2 is a kind of pattern foundation pit supporting structure prefabricated pile working load state sectional view that the present invention is provided.
Fig. 3 is that a kind of pattern foundation pit supporting structure prefabricated pile that the present invention is provided releases use state sectional view.
Fig. 4 is the sectional view at A-A in Fig. 1.
Fig. 5 is the sectional view at B-B in Fig. 2.
Fig. 6 is the sectional view at C-C in Fig. 3.
The pattern foundation pit supporting structure prefabricated pile that Fig. 7 present invention is provided and Soil-cement water curtain wall and concrete inner support beam structure
The foundation pit support system being collectively forming.
The pattern foundation pit supporting structure prefabricated pile that Fig. 8 present invention is provided and Soil-cement water curtain wall and the common shape of oblique pull anchor cable structure
Into foundation pit support system.
The pattern foundation pit supporting structure prefabricated pile that Fig. 9 present invention is provided is collectively forming with high-pressure rotary jet grouting pile and concrete inner support beam structure
Pattern foundation pit supporting structure curtain system.
The base that the pattern foundation pit supporting structure prefabricated pile that Figure 10 present invention is provided is collectively forming with high-pressure rotary jet grouting pile and oblique pull anchor cable structure
Cheat supporting curtain system.
Embodiment
As shown in Fig. 1 ~ 7, post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile 12, the pattern foundation pit supporting structure is pre-
Stake cross section processed is T-shaped, and the pattern foundation pit supporting structure prefabricated pile 12T fonts top and T-shaped bottom are vertically arranged with prestressing force
Beam hole 8, the prestressing force beam hole wears prestressing tendon 6, and the pattern foundation pit supporting structure prefabricated pile 12 also includes joint 1, construction muscle 3 and hoop
Muscle 4, the joint 1 is located at the two ends of pattern foundation pit supporting structure prefabricated pile 12, and the construction flaccidity of tendon and muscle 3 is to being arranged in pattern foundation pit supporting structure prefabricated pile 12
Interior, the stirrup 4 is laterally arranged in pattern foundation pit supporting structure prefabricated pile 12.Longitudinal two ends of the pattern foundation pit supporting structure prefabricated pile are provided with stake end
Butt junction location pin and positioning hole, longitudinal two ends of the pattern foundation pit supporting structure prefabricated pile are provided with component hoisting ring or lifting eye, the stake
Body side is provided with neck 14.
The pattern foundation pit supporting structure prefabricated pile 12T fonts top, and the lower section of the superposed prestressing force beam hole 8 is provided with stake
Bottom injected hole 15.
The end of prestressing tendon 6 is provided with prestressing tendon retracting device, and the prestressing tendon retracting device includes being respectively arranged at
The first prestressing tendon trap 5 and the second prestressing tendon trap 11 at prestressing tendon two ends.
It is provided with outside prestressing tendon 6 outside prestressing tendon sleeve pipe 7, the prestressing tendon sleeve pipe 7 and is provided with stress Shu Suoding
Part 10.
The joint 1 is provided with reinforcement 2.
It is filled with the pile grouting hole 15 in grouting behind shaft or drift lining body 16, the prestressing force beam hole 8 of bottom and is filled with grouting behind shaft or drift lining body
17,6 are filled with grouting behind shaft or drift lining body 13 in the prestressing force beam hole on top
The pattern foundation pit supporting structure prefabricated pile pour concrete precast construction 9, the periphery of concrete precast construction 9 forms neck 14.
The preparation method of post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile, comprises the following steps：
1st, compacting, with flattening pattern foundation pit supporting structure prefabricated pile fabricating yard platform；
2nd, laying pattern foundation pit supporting structure prefabricated pile end template is carried out using integrated form template；
3rd, pattern foundation pit supporting structure prefabricated pile reinforcing bar colligation is carried out：
3.1st, raw material of reinforcement rebar prepares；
3.2nd, apply for checking and examination, censorship；
3.3rd, reinforcing bar setting-out, processing, making.
The 4th, pattern foundation pit supporting structure prefabricated pile built-in fitting and support are installed；
5th, the integrated template encapsulation of pile body both sides；
6th, pattern foundation pit supporting structure prefabricated pile concrete placings shape；
6.1st, sandstone, cement censorship, apply for checking and examination；
6.2nd, concrete proportioning is calculated；
6.3rd, concrete stirring, transport, pumping.
7th, the prefabricated pile body of pattern foundation pit supporting structure is steam-cured：
7.1st, it is synchronous to make the steam-cured test block of concrete；
7.2nd, the steam-cured test block pressure testing of concrete：
7.2.1 the steam-cured test block of concrete, is detected by pressure testing, it is qualified to determine whether；
7.2.2 the sampling observation of pattern foundation pit supporting structure prefabricated pile batch and static load test, are carried out；
If the 8, the steam-cured test block of concrete and sampling static load Two indices are qualified after tested, come into operation, if unqualified, carry out structure benefit
Come into operation, or scrap after strong；
9th, pattern foundation pit supporting structure prefabricated pile prestressing force beam hole inner hole wall is cleared up, it is ensured that unobstructed in prestressing force beam hole；
10th, the lashing prestressing tendon in prestressing force beam hole；
11st, carry out pattern foundation pit supporting structure prefabricated pile and lay construction；
12nd, prestressing tendon tensioning；
12.1st, calculated prestressing force tensioning value；
13rd, sealing off and covering anchorage；
14th, slip casting in prestressing force beam hole；
14.1st, slip casting is cement mortar；
15th, make and form pattern foundation pit supporting structure prefabricated pile.
The construction method of post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile：The construction method is will be pre-
The retaining wall formed in stress posttension tension beam recoverable pattern foundation pit supporting structure prefabricated pile insertion cement earth mixtures, be
PRPCW engineering methods, comprise the following steps：
1st, rig drilling, stirring pore-forming, rig can for single shaft, twin shaft or three axles etc.,
1.1st, stake site is determined；
1.2nd, high-pressure injection pump churning；
1.2.1, configuration cement mortar；
1.2.2 grouting pump churning pressure, is set；
1.3rd, air pump charged air pressure is set, gases at high pressure are formed；
2nd, the aperture of measurement cement earth mixtures mixing pile pore-forming, hole depth；
3rd, Soil-cement pile or wall：
Churning by rig and water under high pressure mud, gases at high pressure to hole wall surrounding soil is cut, stirring, and formation is mixed by soil cement
The cement earth mixtures mixing pile body of compound, is set gradually to form foundation ditch ground by multiple cement earth mixtures mixing pile bodies
Enclosure wall；
4th, pattern foundation pit supporting structure prefabricated pile is laid；
4.1st, lay whether pronucleus meets foundation pit enclosure Design Requirement Drawing to pattern foundation pit supporting structure prefabricated pile length and specification；
4.2nd, check pattern foundation pit supporting structure prefabricated pile outward appearance whether there is incomplete, fracture etc.；
4.3rd, pattern foundation pit supporting structure prefabricated pile is laid in place.
5th, pattern foundation pit supporting structure prefabricated pile prestressing force beam hole inner hole wall is cleared up, is made unobstructed in prestressing force beam hole；
6th, prestressing tendon is worn：Check prestressing tendon（Muscle）Specification, quantity.
7th, measurement verification pattern foundation pit supporting structure prefabricated pile has assigned length and perpendicularity, makes Soil-cement mixture pressure testing
Block.
8th, pattern foundation pit supporting structure prefabricated pile pile grouting；Stirred for increase pattern foundation pit supporting structure prefabricated pile pile body surrounding with cement earth mixtures
Mix stake（Wall）Between cohesive force and improve cement earth mixtures mixing pile（Wall）Intensity, pattern foundation pit supporting structure prefabricated pile lay
（Insert）After the completion of pass through in pattern foundation pit supporting structure prefabricated pile before reserved special slip casting hole carry out pile grouting
8.1st, cement mortar is configured
8.2.1, the test verification ratio of mud
8.3rd, grouting pressure is set on request
9th, the post-stretching of pattern foundation pit supporting structure prefabricated pile is locked, i.e., apply prestressing force to pattern foundation pit supporting structure prefabricated pile：
10.1st, test is with age Soil-cement mixture pressure testing bulk strength；
10.1.1, the Soil-cement Wall/stake for test block test failure carry out reinforcement or again complement soil stir wall/
Stake；
10.2nd, calculated prestressing force tensioning value and record；
10th, slip casting in post-stress beam hole:
10.1st, grouting pump is in place
10.2nd, cement mortar is configured
10.3rd, the test verification ratio of mud
10.4th, grouting pressure is set
11st, construction of prefabricated piles is finished.
12nd, stake internal stress Shu Huishou：
12.1st, after after the completion of power transmission belt construction on the outside of shear wall or after the peripheral backfilling of earthwork of foundation ditch, the recovery anchor of prefabricated pile upper end
Has prestressing force in device unblock, slow release stake.
12.2nd, steel strand wires or deformed bar in PRP are reclaimed
12.3rd, stress Shu Huishou is finished.
Pattern foundation pit supporting structure prefabricated pile uses as follows：
The pattern foundation pit supporting structure prefabricated pile that the pattern foundation pit supporting structure prefabricated pile figure present invention is provided and Soil-cement water curtain wall 18 and concrete
Inner support beam structure 21 cooperatively forms overall foundation pit support system；Or with Soil-cement water curtain wall and oblique pull anchor cable
Structure 19 cooperatively forms overall foundation pit support system.As shown in Figure 10.
Pattern foundation pit supporting structure prefabricated pile function uses releasing：Treat that overall foundation pit construction is finished, agent structure support replacement beam or load transfering strip
Intensity is reached after design requirement, to other inner support systems（Concrete inner support beam system or anchor cable oblique pull system）Removed
Or abolish.To the stress of prestressing tendon pre-add before in slow release pattern foundation pit supporting structure prefabricated pile, until being zero.
Prestressing tendon in pattern foundation pit supporting structure prefabricated pile（Muscle）Reclaim：By the dress for being embedded in pattern foundation pit supporting structure prefabricated pile bottom before
Put and recovery is unlocked to prestressing tendon.
Pattern foundation pit supporting structure prefabricated pile function is using terminating：Agent structure goes out the positive negative zero of foundation ditch, internal support of foundation pit system（Concrete
Inner support beam system or anchor cable oblique pull system）Remove or abolish, the outer backfilling of earthwork of foundation ditch shear wall is finished.Pattern foundation pit supporting structure prefabricated pile
Support Function failure in pattern foundation pit supporting structure, foundation ditch integer support systemic effect terminates.
As shown in figure 8, present invention additionally comprises the construction of post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile
Method, it is characterised in that the construction method is that post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile combines height
The retaining wall that pressure rotary-spraying stake 20 is formed, i.e. PRPJW engineering methods, comprise the following steps：
1st, excavate rig drilling, excavate pore-forming：
1.1st, unwrapping wire determines stake site；
1.2nd, rig is excavated in place；
1.3rd, the aperture of measurement pore-forming, hole depth：
2nd, pattern foundation pit supporting structure prefabricated pile is laid：
2.1st, lay whether pronucleus meets foundation pit enclosure Design Requirement Drawing to pattern foundation pit supporting structure prefabricated pile length and specification；
2.2nd, check pattern foundation pit supporting structure prefabricated pile outward appearance whether there is incomplete, fracture etc.；
2.3rd, pattern foundation pit supporting structure prefabricated pile is laid in place.
3rd, prestressing tendon is worn：
3.1st, pattern foundation pit supporting structure prefabricated pile prestressing force beam hole inner hole wall is cleared up, is made unobstructed in prestressing force beam hole；3.2nd, prestressing force is checked
Specification, the quantity of beam.
4th, pattern foundation pit supporting structure prefabricated pile pile grouting, the slurry is cement mortar or cement mortar or pea gravel concreten）：
After pattern foundation pit supporting structure prefabricated pile is laid and reaches layout design length, pass through slip casting reserved before in pattern foundation pit supporting structure prefabricated pile
Hole carries out mud soil in pile grouting, former excavated hole and is replaced as concrete bodies or body or cement slurry sets body, makes coagulation
The soil body or body or one firm stress of cement slurry sets body and the formation of pattern foundation pit supporting structure prefabricated pile are overall.Also increase simultaneously
Frictional force between pattern foundation pit supporting structure prefabricated pile pile body surrounding and ground, improves foundation ditch ground（The soil body）Steadiness.
4.1st, cement mortar is configured（Or cement mortar or pea gravel concreten）；
4.1.1, the test verification ratio of mud；
4.2nd, grouting pressure is set on request；
5th, pattern foundation pit supporting structure prefabricated pile waterproof between piles stake/wall rotary-spraying construction:
High-pressure spiral jetting diaphragm stake is located between two pattern foundation pit supporting structure prefabricated piles, passes through rig and water under high pressure mud, gases at high pressure device to hole
Wall surrounding soil churning cutting, stirring, formed cement earth mixtures high-pressure rotary jet grouting pile 20, by multiple high-pressure rotary jet grouting piles 20 according to
Secondary set forms a closed foundation pit waterproof curtain wall（Retaining wall）.
5.1st, unwrapping wire determines rotary churning pile site
5.2nd, hole is drawn
5.2.1 drilling machine, is drawn in place
5.2.2, rig drilling draws hole
5.2.3 aperture hole depth, is measured
5.3rd, water under high pressure mud churning pile
5.3.1, high-pressure rotary-spray pump machine is in place
5.3.2 cement mortar, is configured, the ratio of mud is checked
5.3.3 grouting pump churning pressure, is set
5.4th, gases at high pressure stirring concrete earth, forms the stake of cement earth mixtures（Water-seal pile）
5.4.1, high-pressure pump it is in place
5.4.2 high-pressure pump supply gas pressure, is set
5.5th, the sampling same period makes cement churning body test block
5.5.1, cement churning body test block maintenance age is set by design of foundation pit drawing requirement
6th, the post-stretching of pattern foundation pit supporting structure prefabricated pile is locked, i.e., apply prestressing force to pattern foundation pit supporting structure prefabricated pile：
6.1st, test is with age high-pressure rotary jet grouting pile pressure testing bulk strength；
6.1.1, for test block test failure, the high-pressure rotary-spray wall of reply correspondence section（Stake）Carry out reinforcement or again complement；
6.2nd, stretching machine prepares in place；
6.2.1, calculated prestressing force tensioning value；
6.2.2, check and record the prestressed stretch-draw lock value of single pile application；
7th, slip casting in post-stress beam hole；
8th, construction of prefabricated piles is finished；
9th, stake internal stress Shu Huishou：
9.1st, after after the completion of power transmission belt construction on the outside of shear wall or after the peripheral backfilling of earthwork of foundation ditch, the recovery anchorage of prefabricated pile upper end
Device is unlocked, prestressing force in slow release stake；
9.2nd, steel strand wires or deformed bar in PRP are reclaimed；
9.3rd, stress Shu Huishou is finished.
As shown in Figure 9, Figure 10, pattern foundation pit supporting structure prefabricated pile uses as follows：Pattern foundation pit supporting structure prefabricated pile and high-pressure rotary jet grouting pile 20 and
The pattern foundation pit supporting structure curtain system that concrete inner support beam structure is collectively forming, or with high-pressure rotary jet grouting pile 20 and oblique pull anchor cable structure
The 19 pattern foundation pit supporting structure curtain systems being collectively forming.
Pattern foundation pit supporting structure prefabricated pile function uses releasing：Treat that overall foundation pit construction is finished, agent structure support replacement beam or load transfering strip
Intensity is reached after design requirement, to other inner support systems（Concrete inner support beam system or anchor cable oblique pull system）Removed
Or abolish.To the stress of prestressing tendon pre-add before in slow release PRP, until being zero.
Prestressing tendon is reclaimed in pattern foundation pit supporting structure prefabricated pile：By being embedded in the device of PRP bottoms before to prestressing tendon
It is unlocked recovery.
Pattern foundation pit supporting structure prefabricated pile function and foundation ditch integer support systemic effect terminate：Agent structure goes out the positive negative zero of foundation ditch, base
Cheat inner support system（Concrete inner support beam system or anchor cable oblique pull system）Remove or abolish, the outer backfilling of earthwork of foundation ditch shear wall
Finish.The PRP Support Function failures in pattern foundation pit supporting structure, overall foundation pit support system effect terminates.
Claims (10)
1. post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile, it is characterised in that the pattern foundation pit supporting structure prefabricated pile
Cross section is T-shaped, and the T-shaped top of pattern foundation pit supporting structure prefabricated pile and T-shaped bottom are vertically arranged with prestressing force beam hole, institute
State prestressing force beam hole and wear prestressing tendon, the pattern foundation pit supporting structure prefabricated pile also includes joint, construction muscle and stirrup, the joint position
In the two ends of pattern foundation pit supporting structure prefabricated pile, the construction flaccidity of tendon and muscle is to being arranged in pattern foundation pit supporting structure prefabricated pile, and the stirrup is laterally arranged
In pattern foundation pit supporting structure prefabricated pile, longitudinal two ends of the pattern foundation pit supporting structure prefabricated pile are provided with stake end butt junction location pin and positioning hole, institute
The longitudinal two ends for stating pattern foundation pit supporting structure prefabricated pile are provided with component hoisting ring or lifting eye, and the pile body side is provided with neck.
2. post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile as claimed in claim 1, it is characterised in that institute
State and be provided with pile grouting hole below the T-shaped top of pattern foundation pit supporting structure prefabricated pile, and the superposed prestressing force beam hole, it is described
Grouting behind shaft or drift lining body is filled with pile grouting hole.
3. post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile as claimed in claim 1, it is characterised in that pre-
Stress beam end is provided with prestressing tendon retracting device, and the prestressing tendon retracting device includes being respectively arranged at prestressing tendon two ends
The first prestressing tendon trap and the second prestressing tendon trap.
4. the post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile as described in claim 1 or 4, its feature exists
In being provided with outside prestressing tendon outside prestressing tendon sleeve pipe, the prestressing tendon sleeve pipe and be provided with stress beam locking piece.
5. post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile as claimed in claim 1, it is characterised in that institute
State joint and be provided with reinforcement and reinforced pipe.
6. post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile as claimed in claim 1, it is characterised in that institute
The longitudinal two ends for stating pattern foundation pit supporting structure prefabricated pile are provided with stake end butt junction location pin and positioning hole, the longitudinal direction of the pattern foundation pit supporting structure prefabricated pile
Two ends are provided with component hoisting ring or lifting eye.
7. post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile as claimed in claim 1, it is characterised in that institute
State and grouting behind shaft or drift lining body is filled with prestressing force beam hole.
8. the preparation method of post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile, it is characterised in that including following
Step：
1st, compacting, with flattening pattern foundation pit supporting structure prefabricated pile fabricating yard platform；
2nd, laying pattern foundation pit supporting structure prefabricated pile end template is carried out using integrated form template；
3rd, pattern foundation pit supporting structure prefabricated pile reinforcing bar colligation is carried out；
The 4th, pattern foundation pit supporting structure prefabricated pile built-in fitting and support are installed；
5th, the integrated template encapsulation of pile body both sides；
6th, pattern foundation pit supporting structure prefabricated pile concrete placings shape；
7th, the prefabricated pile body of pattern foundation pit supporting structure is steam-cured：
7.1st, it is synchronous to make the steam-cured test block of concrete；
7.2nd, the steam-cured test block pressure testing of concrete：
7.2.1 the steam-cured test block of concrete, is detected by pressure testing, it is qualified to determine whether；
7.2.2 the sampling observation of pattern foundation pit supporting structure prefabricated pile batch and static load test, are carried out；
If the 8, the steam-cured test block of concrete and sampling static load Two indices are qualified after tested, come into operation, if unqualified, carry out structure benefit
Come into operation, or scrap after strong；
9th, pattern foundation pit supporting structure prefabricated pile prestressing force beam hole inner hole wall is cleared up, it is ensured that unobstructed in prestressing force beam hole；
10th, the lashing prestressing tendon in prestressing force beam hole；
11st, carry out pattern foundation pit supporting structure prefabricated pile and lay construction；
12nd, prestressing tendon tensioning；
12.1st, calculated prestressing force tensioning value；
13rd, sealing off and covering anchorage；
14th, slip casting in prestressing force beam hole；
14.1st, slip casting is cement mortar；
15th, make and form pattern foundation pit supporting structure prefabricated pile.
9. the construction method of post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile, it is characterised in that the construction
Method is that post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile is inserted to the earth-retaining formed in cement earth mixtures
Wall, as PRPCW engineering methods, comprise the following steps：
1st, rig drilling, stirring pore-forming：
1.1st, stake site is determined；
1.2nd, high-pressure injection pump churning；
1.2.1, configuration cement mortar；
1.2.2 grouting pump churning pressure, is set；
1.3rd, air pump charged air pressure is set, gases at high pressure are formed；
2nd, the aperture of measurement cement earth mixtures mixing pile pore-forming, hole depth；
3rd, Soil-cement pile or wall：
Churning by rig and water under high pressure mud, gases at high pressure to hole wall surrounding soil is cut, stirring, and formation is mixed by soil cement
The cement earth mixtures mixing pile body of compound, is set gradually to form foundation ditch ground by multiple cement earth mixtures mixing pile bodies
Enclosure wall；
4th, pattern foundation pit supporting structure prefabricated pile is laid；
5th, pattern foundation pit supporting structure prefabricated pile prestressing force beam hole inner hole wall is cleared up, is made unobstructed in prestressing force beam hole；
6th, prestressing tendon is worn：
7th, measurement verification pattern foundation pit supporting structure prefabricated pile has assigned length and perpendicularity；
8th, pattern foundation pit supporting structure prefabricated pile pile grouting；
9th, the post-stretching of pattern foundation pit supporting structure prefabricated pile is locked, i.e., apply prestressing force to pattern foundation pit supporting structure prefabricated pile：
9.1st, test is with age Soil-cement mixture pressure testing bulk strength；
9.1.1, Soil-cement Wall/stake for test block test failure carries out reinforcement or complement soil stirs wall/stake again；
9.2nd, calculated prestressing force tensioning value and record；
10th, slip casting in post-stress beam hole；
11st, construction of prefabricated piles is finished；
12nd, stake internal stress Shu Huishou：
12.1st, after after the completion of power transmission belt construction on the outside of shear wall or after the peripheral backfilling of earthwork of foundation ditch, the recovery anchor of prefabricated pile upper end
Has prestressing force in device unblock, slow release stake；
12.2nd, steel strand wires or deformed bar in PRP are reclaimed
12.3rd, stress Shu Huishou is finished.
10. the construction method of post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile, it is characterised in that the construction
Method is the retaining wall of post-tensioned prestressed tension beam recoverable pattern foundation pit supporting structure prefabricated pile combination high-pressure rotary jet grouting pile formation, i.e.,
PRPJW engineering methods, comprise the following steps：
1st, excavate rig drilling, excavate pore-forming：
1.1st, unwrapping wire determines stake site；
1.2, excavate rig it is in place；
1.3rd, the aperture of measurement pore-forming, hole depth：
2nd, pattern foundation pit supporting structure prefabricated pile is laid：
3rd, prestressing tendon is worn：
3.1st, pattern foundation pit supporting structure prefabricated pile prestressing force beam hole inner hole wall is cleared up, is made unobstructed in prestressing force beam hole；
5th, pattern foundation pit supporting structure prefabricated pile pile grouting, the slurry is cement mortar or cement mortar or pea gravel concreten：
Mud soil in pile grouting, former excavated hole is carried out by injected hole reserved before in pattern foundation pit supporting structure prefabricated pile to be replaced as
Concrete bodies or body or cement slurry sets body, make concrete bodies or body or cement slurry sets body and pattern foundation pit supporting structure prefabricated
It is overall that stake forms a firm stress；
5.1st, cement mortar is configured；
6th, pattern foundation pit supporting structure prefabricated pile waterproof between piles stake/wall rotary-spraying construction:
High-pressure spiral jetting diaphragm stake is located between two pattern foundation pit supporting structure prefabricated piles, passes through rig and water under high pressure mud, gases at high pressure device to hole
Wall surrounding soil churning cutting, stirring, formed cement earth mixtures high-pressure rotary-spray pile body, by multiple high-pressure rotary-spray pile bodies according to
Secondary set forms closed a foundation pit waterproof curtain wall or retaining wall；
7th, the post-stretching of pattern foundation pit supporting structure prefabricated pile is locked, i.e., apply prestressing force to pattern foundation pit supporting structure prefabricated pile：
7.1st, test is with age high-pressure rotary jet grouting pile pressure testing bulk strength；
7.1.1, for test block test failure, reinforcement or again complement should be carried out to high-pressure rotary-spray wall/stake of correspondence section；
7.2nd, stretching machine prepares in place；
7.2.1, calculated prestressing force tensioning value；
7.2.2, check and record the prestressed stretch-draw lock value of single pile application；
8th, slip casting in post-stress beam hole；
9th, construction of prefabricated piles is finished；
10th, stake internal stress Shu Huishou：
10.1st, after after the completion of power transmission belt construction on the outside of shear wall or after the peripheral backfilling of earthwork of foundation ditch, the recovery anchor of prefabricated pile upper end
Has prestressing force in device unblock, slow release stake；
10.2nd, steel strand wires or deformed bar in PRP are reclaimed
10.3rd, stress Shu Huishou is finished.
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| CN108547276A (en) * | 2018-05-28 | 2018-09-18 | 宁波交通工程建设集团有限公司 | It is waterborne to fill sand steel tube pile embeded in rock workbench and its construction method |
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| CN115467340A (en) * | 2022-09-28 | 2022-12-13 | 上海同人里岩土工程技术有限公司 | Foundation pit enclosure prefabricated component and construction method thereof |
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Application publication date: 20170811 |