CN109778845A - The construction method and connecting node of deposited reinforced concrete pile pile extension - Google Patents
The construction method and connecting node of deposited reinforced concrete pile pile extension Download PDFInfo
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- CN109778845A CN109778845A CN201910095760.8A CN201910095760A CN109778845A CN 109778845 A CN109778845 A CN 109778845A CN 201910095760 A CN201910095760 A CN 201910095760A CN 109778845 A CN109778845 A CN 109778845A
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- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 77
- 238000010276 construction Methods 0.000 title claims abstract description 39
- 239000004567 concrete Substances 0.000 claims abstract description 75
- 239000002689 soil Substances 0.000 claims abstract description 48
- 210000003205 muscle Anatomy 0.000 claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 230000002787 reinforcement Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000005266 casting Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 244000309464 bull Species 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses the construction methods and connecting node of a kind of deposited reinforced concrete pile pile extension, belong to pile foundation construction technical field.The construction method, huge rotary torque is provided by full-rotating drill, outer sleeve is pressed into the soil body and entangles the deposited reinforced concrete pile to pile extension, then the soil body in outer sleeve is removed, pile crown and vertical muscle to deposited reinforced concrete pile are modified, inner sleeve is transferred and fixed, steel reinforcement cage, casting concrete are transferred in inner sleeve, completes the pile connection construction of deposited reinforced concrete pile.The construction method has the advantages that full-rotating drill can provide huge rotary torque, outer sleeve is pressed into the soil body, outer sleeve verticality and position precision are high, method relative to hammer driven, have the advantages that noise is small, it is small to influence on the soil body of surrounding, and concrete cushion, rock stratum etc. can be passed through；The construction method also has the advantages that earthwork excavated volume is small, speed of application is fast, pile quality is good.
Description
Technical field
The present invention relates to the construction methods and connecting node of a kind of deposited reinforced concrete pile pile extension, belong to pile foundation construction
Technical field.
Background technique
Pile foundation has biggish bearing capacity and stability, has stronger adaptability, Er Qieneng to different geological conditions
Enough to reduce earthwork excavated volume to greatest extent, therefore, pile foundation is utilized extensively in engineering construction.
Deposited reinforced concrete pile is a kind of relatively conventional column foundation, and for prefabricated pile, armored concrete is filled
Note stake has the characteristics that diameter is big, noise is small, lower to foundation requirement.However, the concrete of deposited reinforced concrete pile is often
It is to be perfused in muddy water, therefore concrete quality is difficult to control, after concreting, in fact it could happen that armored concrete fills
Design requirement is not achieved in note stake local quality, carries out pile extension after being cut.There is broken pile in deposited reinforced concrete pile
Or elevation of top be lower than designed elevation when, it is also possible to need to take the technical solution of pile extension.
When using cut and cover method cost larger or not having open cut condition, how pile extension is carried out to deposited reinforced concrete pile
Construction, is pile foundation field technical problem urgently to be resolved.
Summary of the invention
The present invention provides the construction method and connecting node of a kind of deposited reinforced concrete pile pile extension, without to the soil body into
Row open cut has the advantages that speed of application is fast, pile extension effect is good.
In order to solve the above technical problems, the present invention includes following technical solution:
A kind of construction method of deposited reinforced concrete pile pile extension, comprising:
Deposited reinforced concrete pile is positioned, full-rotating drill is set in the surface of deposited reinforced concrete pile；
Outer sleeve is pressed into soil using full-rotating drill, the elevation of bottom of outer sleeve is lower than deposited reinforced concrete pile
Elevation of top, and the top of deposited reinforced concrete pile is located in outer sleeve；
Top and the soil body of pile crown surrounding and miscellaneous of device clear deposited reinforced concrete pile are grabbed using punching in outer sleeve
The concrete of the pile crown of deposited reinforced concrete pile is abolished and modified to object, keeps the vertical muscle of pile crown exposed；
Inner sleeve is transferred in outer sleeve, and inner sleeve is made to be set in the top of deposited reinforced concrete pile, and inner sleeve set
Elevation of bottom be lower than deposited reinforced concrete pile top of concrete absolute altitude, the elevation of bottom higher than outer sleeve, make inner sleeve
Axle center it is consistent with the axle center of deposited reinforced concrete pile, will verticality that is fixed and guaranteeing inner sleeve at the top of inner sleeve, and
Backfill is filled between inner sleeve and outer sleeve；
It transfers steel reinforcement cage in inner sleeve, guarantees that the exposed vertical muscle of pile crown protrudes into the length in steel reinforcement cage, fixed steel bars cage,
The casting concrete in inner sleeve；
Outer sleeve is extracted using full-rotating drill after to concreting, is bored before concrete initial set using full circle swinging
Machine extracts inner sleeve.
Further, after concreting, pressing plate is set on concrete, in inner sleeve withdrawal process, pressing plate is applied
Downward pressure, balance newly pour the upward frictional force from inner sleeve that bored concrete pile is subject to.
Further, outer sleeve bottom is provided with cutter head, for cutting the soil body.
Further, the concrete for abolishing and modifying the pile crown of deposited reinforced concrete pile keeps the vertical muscle of pile crown exposed, specifically
Include:
Pile crown is abolished using hand hammer drill machine, pile crown exposure rubble part is abolished, and by pile crown top
Face finishing is smooth, if vertical muscle curtailment, vertical muscle is extended to model reinforcing bar and need length by welding on vertical muscle.
Further, the exposed length of vertical muscle of pile crown is not less than 1m, and after the finishing of pile crown top surface is smooth, pile crown top surface is away from inner sleeve
The vertical range of bottom is not less than 0.5m, and vertical range of the inner sleeve bottom away from outer sleeve bottom is not less than 2m.
Further, after outer sleeve, inner sleeve are extracted, injecting treatment is carried out to the gap left.
Further, backfill uses sandy soil, and the gap that outer sleeve, inner sleeve leave after extracting has sandy soil voluntarily to seal
It closes.
Correspondingly, the present invention also provides a kind of connecting nodes of deposited reinforced concrete pile pile extension, which is characterized in that packet
The original deposited reinforced concrete pile being embedded in the soil body is included, newly pours bored concrete pile with what is spliced at the top of deposited reinforced concrete pile,
Newly pouring bored concrete pile includes steel reinforcement cage and young concrete；The pile crown of original deposited reinforced concrete pile after broken finishing,
Vertical muscle, which stretches out pile crown and protrudes into, newly to be poured in the steel reinforcement cage of bored concrete pile；Young concrete wraps up steel reinforcement cage and original reinforced concrete
The vertical muscle and pile crown surrounding of the pile crown of native bored concrete pile.
Further, the surrounding of bored concrete pile is newly poured filled with sandy soil.
Further, the vertical muscle of pile crown protrudes into the length in steel reinforcement cage not less than 1m, and young concrete wraps up the height of pile crown
Degree is not less than 0.5m.
The construction method of deposited reinforced concrete pile pile extension provided in this embodiment, is provided huge by full-rotating drill
Outer sleeve is pressed into the soil body and entangles the deposited reinforced concrete pile to pile extension, then removes the soil body in outer sleeve by rotary torque,
Pile crown and vertical muscle to deposited reinforced concrete pile are modified, and inner sleeve is transferred and fix, in inner sleeve transfer steel reinforcement cage,
Casting concrete completes the pile connection construction of deposited reinforced concrete pile.The construction method has the advantages that (1) full circle swinging is bored
Machine can provide huge rotary torque, and outer sleeve is pressed into the soil body, and outer sleeve verticality and position precision are high, relative to hammer
Strike into method, have the advantages that noise is small, it is small to influence on the soil body of surrounding, and concrete cushion, rock stratum etc. can be passed through；
(2) it under the retaining wall effect of outer sleeve, carries out the soil body inside outer sleeve and removes work, for cut and cover method, it is only necessary to dig out
A small amount of soil body, construction operation amount is small, and speed of application is fast；(3) the vertical muscle of pile crown and pile crown is modified in outer sleeve, to guarantee
The deposited reinforced concrete pile poured is connected quality with newly pour bored concrete pile；(4) in being placed under the retaining wall effect of outer sleeve
Sleeve transfers steel reinforcement cage and casting concrete, it is ensured that pile quality in inner sleeve.
Detailed description of the invention
Fig. 1 is housing tube construction and the schematic diagram that cuts of pile crown in one embodiment of the invention；
Fig. 2 is the inner sleeve tube construction and pile extension schematic diagram in one embodiment of the invention.
Figure label is as follows:
1- outer sleeve；2- inner sleeve；3- backfill；4- pressing plate；10- deposited reinforced concrete pile；11- pile crown；12- is vertical
Muscle；13- extends reinforcing bar；20- newly pours bored concrete pile；21- steel reinforcement cage；22- concrete.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to a kind of construction of deposited reinforced concrete pile pile extension provided by the invention
Method and connecting node are described in further detail.In conjunction with following explanation, advantages and features of the invention will be become apparent from.It needs to illustrate
, attached drawing is all made of very simplified form and using non-accurate ratio, only conveniently, lucidly to aid in illustrating originally
The purpose of inventive embodiments.
Embodiment one
The construction method for present embodiments providing a kind of deposited reinforced concrete pile pile extension, for being imbedded in underground and tool
There is the deposited reinforced concrete pile of certain buried depth to carry out pile extension.For example, deposited reinforced concrete pile stake top buried depth be 10m and
When above, according to cut and cover tunneling, need to dig out a large amount of soil bodys and just can be carried out construction after dewatering measure need to be taken, after construction
It also needs to backfill the soil body, larger workload.Deposited reinforced concrete pile pile extension provided in this embodiment can be used at this time
Construction method.
The construction method is further described below with reference to Fig. 1 and Fig. 2, which specifically comprises the following steps:
Step 1: positioning deposited reinforced concrete pile 10, is arranged in the surface of deposited reinforced concrete pile 10
Full-rotating drill.According to the location information of deposited reinforced concrete pile 10,22 bored concrete pile of concrete is determined on the ground
Position.As introduction, full-rotating drill generally include equipment (as work running gear, wedge-shaped clamping device, vertical means,
Motor reducer etc.), hydraulic power station (such as engine, control system, cutter head load automatic control system) and auxiliary machine tool
(such as punching grab bucket, weight, bull pawl, rotary drilling digger, augers), full-rotating drill is capable of providing huge torque.
Outer sleeve 1: being pressed into soil by step 2 using full-rotating drill, and the elevation of bottom of outer sleeve 1 is lower than reinforced concrete
The elevation of top of native bored concrete pile 10, and the top of deposited reinforced concrete pile 10 is located in outer sleeve 1.The wedge shape of full-rotating drill
Clamping device clamps outer sleeve 1, makes outer sleeve 360 degree rotation and is pressed down against the soil body, and transferring to 1 elevation of bottom of outer sleeve needs
The absolute altitude wanted.Preferably, the bottom of outer sleeve 1 is provided with cutter head, by cutting the soil body, accelerates 1 speed of application of outer sleeve.
Step 3: top and the pile crown 11 4 of device clear deposited reinforced concrete pile 10 are grabbed using punching in outer sleeve 1
The soil body and sundries in week, abolish and modify the concrete 22 of the pile crown 11 of deposited reinforced concrete pile 10, make the vertical muscle of pile crown 11
12 is exposed.In order to guarantee that top newly pours the splicing matter between the existing deposited reinforced concrete pile 10 of bored concrete pile 20 and lower part
Amount, the vertical exposed length of muscle 12 will reach 1m or more.As an example, pile crown 11 is abolished using hand hammer drill machine, by stake
First 11 exposure rubble part is abolished, and the finishing of 11 top surface of pile crown is smooth.As an example, indulging the control of the exposed length of muscle 12 is
1.5m can be welded with model reinforcing bar on vertical muscle 12 if curtailment 1.5m, vertical muscle 12 is extended to and needs length, such as
Extension reinforcing bar 13 in Fig. 1.Soil excavation depth can be flat with inner sleeve elevation of bottom depending on the following depth of inner sleeve
Together, the elevation of bottom of inner sleeve can also be slightly above (that is, making to be conducive to consolidating for inner sleeve in the inner sleeve bottom insertion soil body
It is fixed)；The following depth of outer sleeve should meet the buried depth requirement of outer sleeve bottom, as distance is 3m between bottom and soil excavation face
Or more.
Step 4: as shown in Fig. 2, transferring inner sleeve 2 in outer sleeve 1, inner sleeve 2 is made to be set in armored concrete perfusion
The top of stake 10, and 2 sets of inner sleeve of elevation of bottom is lower than the top of concrete absolute altitude of deposited reinforced concrete pile 10, higher than outer
The elevation of bottom of sleeve 1 keeps the axle center of inner sleeve 2 consistent with the axle center of deposited reinforced concrete pile 10, will be solid at the top of inner sleeve 2
Determine and guarantee the verticality of inner sleeve 2, and fills backfill 3 between inner sleeve 2 and outer sleeve 1.Preferably, 11 top surface of pile crown
Modify it is smooth after, vertical range of 11 top surface of pile crown away from 2 bottom of inner sleeve be not less than 0.5m, 2 bottom of inner sleeve is away from 1 bottom of outer sleeve
The vertical range in portion is not less than 2m.As shown in Figure 2, the vertical range 1.0m of 11 top surface of pile crown and 2 bottom of inner sleeve, inner sleeve
Vertical range of 2 bottoms away from 1 bottom of outer sleeve is 3m.
Step 5: steel reinforcement cage 21 is transferred in inner sleeve 2, protrudes into exposed vertical muscle 12 in steel reinforcement cage 21, fixed steel bars
Cage 21, the casting concrete 22 in inner sleeve 2.Wherein, the bottom of steel reinforcement cage 21 contacts 11 top surface of pile crown.
Step 6: outer sleeve 1 is extracted using full-rotating drill after pouring to concrete 22, before 22 initial set of concrete
Inner sleeve 2 is extracted using full-rotating drill.As an example, it can pour and be completed in half an hour after in concrete 22, to outer steel sleeve
Cylinder is pulled out.After outer sleeve 1 and inner sleeve 2 are extracted, injecting treatment is carried out to the gap left.
The construction method of 10 pile extension of deposited reinforced concrete pile provided in this embodiment, is provided huge by full-rotating drill
Rotary torque, outer sleeve 1 is pressed into the soil body and entangles deposited reinforced concrete pile 10 to pile extension, then removes outer sleeve 1
The interior soil body modifies the pile crown 11 and vertical muscle 12 of deposited reinforced concrete pile 10, transfers and fix inner sleeve 2, in inner sleeve
Steel reinforcement cage 21, casting concrete 22 are transferred in cylinder 2, complete the pile connection construction of deposited reinforced concrete pile 10.Construction method tool
Have the following advantages: (1) full-rotating drill can provide huge rotary torque, outer sleeve is pressed into the soil body, outer sleeve is vertical
Degree and position precision are high, relative to the method for hammer driven, have the advantages that noise is small, it is small to influence on the soil body of surrounding, and can
To pass through concrete cushion, rock stratum etc.；(2) it under the retaining wall effect of outer sleeve, carries out the soil body inside outer sleeve and removes work, phase
For cut and cover method, it is only necessary to dig out a small amount of soil body, construction operation amount is small, and speed of application is fast；(3) pile crown is modified in outer sleeve
And the vertical muscle of pile crown, to guarantee that the deposited reinforced concrete pile that has poured is connected quality with newly pour bored concrete pile；(4) outside
The retaining wall effect of sleeve is lower to place inner sleeve, steel reinforcement cage and casting concrete is transferred in inner sleeve, it is ensured that pile quality.
Preferred embodiment is, after concrete 22 pours, pressing plate 4 is arranged on concrete 22, extracted in inner sleeve 2
Cheng Zhong applies downward pressure to pressing plate 4, and balance newly pours the upward frictional force from inner sleeve 2 that bored concrete pile 20 is subject to, from
And prevent from taking the concrete 22 newly poured out of in 2 withdrawal process of inner sleeve, influence pile quality.As an example, pressing plate 4 can be with
For plank, steel plate or reinforced mesh, the shape and size of pressing plate 4 match with the shape and size of inner sleeve 2.
Preferred embodiment is that the backfill 3 in step 4 uses sandy soil, outer sleeve 1, inner sleeve 2 in step 6
The gap left after extraction, by sandy soil seal itself.Sandy soil has mobility, can voluntarily fill outer sleeve 1 or inner sleeve
The gap that cylinder 2 leaves after extracting can exempt the construction technology of mortar filling, and construction effect is good, speed is fast.
Embodiment two
The connecting node for present embodiments providing a kind of deposited reinforced concrete pile pile extension, below with reference to Fig. 1 and Fig. 2 to this
Connecting node is further described.
Referring to figs. 1 and 2, the connecting node includes the original deposited reinforced concrete pile 10 being embedded in the soil body,
Bored concrete pile 20 newly is poured with what is spliced at the top of deposited reinforced concrete pile 10, bored concrete pile 20 is newly poured and includes steel reinforcement cage 21 and newly pour
Build concrete 22.Wherein, the pile crown 11 of original deposited reinforced concrete pile 10 indulges muscle 12 and stretches out pile crown 11 simultaneously after broken finishing
It protrudes into and newly pours in the steel reinforcement cage 21 of bored concrete pile 20；Young concrete 22 wraps up steel reinforcement cage 21 and the perfusion of original armored concrete
11 surrounding of vertical muscle 12 and pile crown of the pile crown 11 of stake 10.
The connecting node of deposited reinforced concrete pile pile extension provided in this embodiment, by the way that original armored concrete to be perfused
The vertical muscle of the pile crown of stake, which protrudes into, newly to be poured in the steel reinforcement cage of bored concrete pile, and young concrete package steel reinforcement cage and original reinforced concrete
The pile crown surrounding of native bored concrete pile, so that the connecting node of deposited reinforced concrete pile pile extension has good globality.
Preferred embodiment is newly to pour the surrounding of bored concrete pile 20 filled with sandy soil.
Preferred embodiment is that the vertical muscle 12 of pile crown 11 protrudes into the length in steel reinforcement cage 21 not less than 1m, is newly poured mixed
The height that solidifying soil 22 wraps up pile crown 11 is not less than 0.5m.
It should be noted that as shown in Fig. 2, the diameter of inner sleeve be greater than original deposited reinforced concrete pile 10 diameter,
And the absolute altitude in soil excavation face is lower than the elevation of top of pile crown, therefore, the diameter for newly pouring bored concrete pile 20 is mixed greater than original reinforcing bar
The diameter of solidifying soil bored concrete pile 10, and young concrete 22 coats the surrounding of pile crown.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of construction method of deposited reinforced concrete pile pile extension characterized by comprising
Deposited reinforced concrete pile is positioned, full-rotating drill is set in the surface of deposited reinforced concrete pile；
Outer sleeve is pressed into soil using full-rotating drill, the elevation of bottom of outer sleeve is lower than the top of deposited reinforced concrete pile
Absolute altitude, and the top of deposited reinforced concrete pile is located in outer sleeve；
The top of device clear deposited reinforced concrete pile and the soil body and sundries of pile crown surrounding are grabbed using punching in outer sleeve, is broken
The concrete for removing and modifying the pile crown of deposited reinforced concrete pile keeps the vertical muscle of pile crown exposed；
Inner sleeve is transferred in outer sleeve, and inner sleeve is made to be set in the top of deposited reinforced concrete pile, and the bottom of inner sleeve set
Portion's absolute altitude is lower than top of concrete absolute altitude, the elevation of bottom higher than outer sleeve of deposited reinforced concrete pile, makes the axis of inner sleeve
The heart is consistent with the axle center of deposited reinforced concrete pile, by verticality that is fixed at the top of inner sleeve and guaranteeing inner sleeve, and in inner sleeve
Backfill is filled between cylinder and outer sleeve；
It transfers steel reinforcement cage in inner sleeve, guarantees that the exposed vertical muscle of pile crown protrudes into the length in steel reinforcement cage, fixed steel bars cage, inside
Casting concrete in sleeve；
Outer sleeve is extracted using full-rotating drill after to concreting, is pulled out before concrete initial set using full-rotating drill
Inner sleeve out.
2. construction method as described in claim 1, which is characterized in that after concreting, pressing plate is set on concrete,
In inner sleeve withdrawal process, downward pressure applied to pressing plate, it is upward from inner sleeve newly to pour that bored concrete pile is subject to for balance
Frictional force.
3. construction method as described in claim 1, which is characterized in that outer sleeve bottom is provided with cutter head, for cutting the soil body.
4. construction method as described in claim 1, which is characterized in that abolish and modify the pile crown of deposited reinforced concrete pile
Concrete keeps the vertical muscle of pile crown exposed, specifically includes:
Pile crown is abolished using hand hammer drill machine, pile crown exposure rubble part is abolished, and pile crown top surface is repaired
Flatten whole, if vertical muscle curtailment, vertical muscle is extended to model reinforcing bar and need length by welding on vertical muscle.
5. construction method as described in claim 1, which is characterized in that the exposed length of vertical muscle of pile crown is not less than 1m, pile crown top
After face finishing is smooth, vertical range of the pile crown top surface away from inner sleeve bottom is not less than 0.5m, and inner sleeve bottom is away from outer sleeve bottom
Vertical range be not less than 2m.
6. construction method as described in claim 1, which is characterized in that outer sleeve, inner sleeve extract after, to the gap left into
Row injecting treatment.
7. construction method as described in claim 1, which is characterized in that backfill uses sandy soil, and outer sleeve, inner sleeve are extracted
There is sandy soil seal itself in the gap left afterwards.
8. a kind of connecting node of deposited reinforced concrete pile pile extension, which is characterized in that including the original reinforcing bar being embedded in the soil body
Cast-in-place concrete pile newly pours bored concrete pile with what is spliced at the top of deposited reinforced concrete pile, and newly pouring bored concrete pile includes steel reinforcement cage
And young concrete；After broken finishing, vertical muscle stretches out pile crown and protrudes into newly to be poured the pile crown of original deposited reinforced concrete pile
It builds in the steel reinforcement cage of bored concrete pile；Young concrete wrap up the pile crown of steel reinforcement cage and original deposited reinforced concrete pile vertical muscle and
Pile crown surrounding.
9. connecting node as claimed in claim 8, which is characterized in that newly pour the surrounding of bored concrete pile filled with sandy soil.
10. connecting node as claimed in claim 8, which is characterized in that it is not small that the vertical muscle of pile crown protrudes into the length in steel reinforcement cage
In 1m, the height that young concrete wraps up pile crown is not less than 0.5m.
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| CN201910095760.8A CN109778845A (en) | 2019-01-31 | 2019-01-31 | The construction method and connecting node of deposited reinforced concrete pile pile extension |
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| CN114657974A (en) * | 2022-04-13 | 2022-06-24 | 中建三局第二建设工程有限责任公司 | Method for quickly splicing cast-in-place pile under complex geological condition |
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Application publication date: 20190521 |