CN106638655A - Conical-head tendon body post-tensioning pile foundation and construction process thereof - Google Patents
Conical-head tendon body post-tensioning pile foundation and construction process thereof Download PDFInfo
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- CN106638655A CN106638655A CN201710097144.7A CN201710097144A CN106638655A CN 106638655 A CN106638655 A CN 106638655A CN 201710097144 A CN201710097144 A CN 201710097144A CN 106638655 A CN106638655 A CN 106638655A
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- muscle body
- conical head
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- conical
- tendon
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
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- 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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
-
- 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)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a conical-head tendon body post-tensioning pile foundation and a construction process thereof. The conical-head tendon body post-tensioning pile foundation comprises a pile body, wherein the center of the pile body is provided with a tendon body; the outer side of the tendon body is sleeved by an spacer sleeve; the top end of the tendon body penetrates through the pile body and is locked by an anchor; the bottom end of the tendon body is provided with a conical-head anchorage body with thicker middle and thinner periphery. By virtue of arranging the conical-head anchorage body on the tendon body, during a process of inserting the tendon body into concrete grout, compared with a traditional flat anchorage body, the conical-head anchorage body is capable of reducing the friction between the concrete grout and the anchorage body, namely reducing the descending resistance of the tendon body, solving the problems of tendon body inclination and bending and low insert efficiency caused by overhigh resistance during a construction process of inserting the tendon body after concrete grouting of long auger holes, and improving the descending working efficiency and working quality of the tendon body; by virtue of threaded connection of the anchorage body and the tendon body, the replaceability of the tendon body is realized, and maintenance on the conical-head tendon body post-tensioning pile foundation during the late stage is solved.
Description
Technical field
The present invention relates to resistance to plucking anti-floating basic field, and in particular to a kind of conehead muscle body posttension pile foundation and construction technology.
Background technology
As the exploitation of the underground space, the anti-floating problem of building are outstanding day by day, building basis is born and pulls out load
Lotus is increasing, in level of ground water area higher, when some underground structures are less than Soil Surrounding water level, underground structure and structure
Build thing and there are problems that structural anti-buoyancy, in order to offset soil in water the buoyancy of fabric structure is acted on, it usually needs adopt
Measure of anti float is taken, existing measure of anti float often constrains subsoil water and building is floated using uplift pile or anti-float anchor rod is arranged
Power, plays building and is difficult to pull out role when floating.
Uplift pile is steel reinforcement cage to be inserted in concrete pile body, due to the relatively low tensile strength of concrete so that pile body is mixed
Solidifying soil is also easy to produce under a stretching force crack, and with the progressively expansion in crack, the inside reinforcing bar of pile body is easily etched, serious shadow
Ring pile body stress safety.In order to avoid the development in uplift pile pile body crack, the consumption that reinforcing bar is controlled by Checking Computation of Cracks is needed,
Generally require to configure substantial amounts of reinforcing bar, cause unnecessary waste.
The content of the invention
It is an object of the invention to provide a kind of conehead muscle body posttension pile foundation and construction technology, in one end of presstressed reinforcing steel body
Using taper header structure, the frictional force between muscle body and concrete grout is effectively reduced, so as to reduce the decentralization resistance of muscle body,
Efficiency of construction is improved, muscle body is solved and is transferred situation not in place or bend fracture.
The purpose of the present invention is to be achieved through the following technical solutions：
A kind of conehead muscle body posttension pile foundation, including pile body, the center of the pile body sets muscle body, the outside of the muscle body
Set is equiped with disrance sleeve, and the top of the muscle body is passed pile body and locked by anchorage, and the bottom of the muscle body is provided with centre
The thin taper of thick surrounding is casted anchor body.
In preferred embodiments, it is described to cast anchor body for conical structure, pyramidal structure or cross wimble structure.
In preferred embodiments, internal thread hole is provided with the center of muscle body phase joint face on the body that casts anchor, institute
The connection end for stating muscle body is provided with the external screw thread being engaged with the internal thread hole.
In preferred embodiments, the body that casts anchor is provided with the connection boss of the fixation disrance sleeve, it is described every
It is threaded connection between sleeve pipe and connection boss.
In preferred embodiments, it is located on the body that casts anchor on the outside of connection boss and is provided with for guiding protective sleeve pipe
Mobile guiding boss, the protection casing pipe sleeve outside disrance sleeve, it is described protection sleeve pipe one end be sleeved on it is described guiding it is convex
On platform, and can move reciprocatingly along the guiding boss, the protection sleeve pipe other end connection vibration hammer.
In preferred embodiments, the protection sleeve pipe is provided with positioning equally distributed around the protection sleeve pipe
Frame, the locating support is perpendicular to the protection sleeve pipe.
A kind of joint bar body construction technique after long spire pore-forming center pressure concrete injecting, its technological process is followed successively by：Surveying setting-out is determined
The drilling in place of hole position, rig, long screw drill rod drilling, the filling of coagulation soil pressure, conical head muscle body are inserted, apply reinforcing body pretightning force.
In preferred embodiments, comprise the following steps：
First the conical head body that casts anchor is fixed on into one end of muscle body, then disrance sleeve is sleeved on muscle body, and by separation sleeve
Pipe be connected boss and fix, obtain conical head muscle body assembly；
The upper end of conical head muscle body assembly is fixedly connected with vibration hammer, using suspender vibration hammer is lifted by crane, make conical head muscle
Body assembly be provided with conical head cast anchor body one end straight down, constitute conical head muscle body lowering system；
Conical head muscle body lowering system is slowly transferred and alignment hole center, and hanging down for conical head muscle body is kept during hanging
Directly；
Conical head muscle body bottom is entered after concrete, it is slow first under the Gravitative Loads of conical head muscle body lowering system under
Put；When transfer to can not sink naturally after, open vibration hammer, with vibration be controlled conical head muscle body decentralization depth；Shaking
During dynamic, it is ensured that steel wire rope band power all the time is lifted, in case conical head muscle body inclines insertion；Reach and stop shaking after projected depth
It is dynamic, dismantle vibration hammer by rotating straight screw sleeve.
In preferred embodiments, following step was included before the conical head muscle body assembly is fixedly connected with vibration hammer
Suddenly：
Protective case pipe is set with the outside of conical head muscle body assembly, and protection sleeve pipe is connected with guiding boss, will
The upper end of protection sleeve pipe is fixedly connected with vibration hammer.
In preferred embodiments, before the step of conical head muscle body assembly is fixedly connected with vibration hammer, in institute
State and some locating supports are installed on conical head muscle body assembly, locating support is tied up by tied silk and is fixed on conical head muscle body assembly
On.
In preferred embodiments, the method for applying reinforcing body pretightning force：After concrete reaches solidification requirement,
The jack cylinder of machine drawing tool is retracted to original position, and with jack the upper end that intermediate plate bites muscle body is engaged, and starts tensioning pump thousand
Jin top makes oil cylinder overhanging, and the anchorage positioned at upper end muscle body is acted against on muscle body supporting plate under the outer top surface effect of jack, continue plus
Pressure, the occlusion mechanism inside jack stings tight muscle body and is pulled outwardly, when the oil gauge on tensioner reaches setting pressure release,
Unclamp, complete the applying of muscle body pretightning force.
Beneficial effects of the present invention are：
1st, the present invention is casted anchor body by arranging conical head on muscle body, when muscle body is inserted in concrete grout, under taper
Anchor body phase is casted anchor body phase ratio for traditional flat board, reduces concrete grout and the frictional force casted anchor between body, that is, reduce muscle
The decentralization resistance of body, to solve and cause muscle body because resistance is excessive in joint bar body construction technique after long auger cast-with-pressure concrete pile
Incline, bend, inserting the low situation of efficiency, improve muscle body decentralization work efficiency and work quality.
2nd, the present invention casts anchor body and muscle body is threaded connection, and formation is removably casted anchor body, realizes later stage replaceable muscle
The prestressing force applied in body, direct removal muscle body, rotation muscle body can unload muscle body, reduce the replacing difficulty of muscle body, i.e.,
Reduce the maintenance cost on basis.
3rd, the present invention arranges protection sleeve pipe, solves muscle body in installation process, damages because of muscle body with concrete friction
Muscle body surface face, causes to reduce muscle body intensity, reduces the problem of muscle body service life, and protects sleeve pipe to be dismountable, by muscle
Body is installed to behind setting position, to protect sleeve pipe it is direct on pull out dismounting, reusable protection sleeve pipe, reduction use cost.
Description of the drawings
The present invention is described in further detail below according to accompanying drawing.
Fig. 1 is the overall structure figure of the conehead muscle body posttension pile foundation described in the embodiment of the present invention；
Fig. 2 a be in Fig. 1 A to enlarged drawing；
Fig. 2 b are the B direction views in Fig. 2 a；
Fig. 3 a are the A of another embodiment in Fig. 1 to enlarged drawing；
Fig. 3 b are the C direction views in Fig. 3 a；
Fig. 4 is the overall structure figure of the conehead muscle body posttension pile foundation described in another kind embodiment of the invention；
Fig. 5 be in Fig. 1 D to amplification assumption diagram；
Fig. 6 be in Fig. 1 E to amplification assumption diagram；
Fig. 7 is bored in joint bar body construction technique after long spire pore-forming center pressure concrete injecting described in another kind embodiment of the invention
The attachment structure figure of forming head muscle body assembly and vibration hammer 13；
Fig. 8 is to protect sleeve pipe in joint bar body construction technique after long spire pore-forming center pressure concrete injecting described in the embodiment of the present invention
11 with the attachment structure figure of vibration hammer 13；
Fig. 9 is the technological process of joint bar body construction technique after long spire pore-forming center pressure concrete injecting described in the embodiment of the present invention
Figure.
In figure：
1st, pile body；2nd, muscle body；3rd, disrance sleeve；4th, anchorage；5th, cast anchor body；6th, flank；7th, locating support；8th, female thread
Hole；9th, boss is connected；10th, boss is guided；11st, sleeve pipe is protected；12nd, location hole；13rd, vibration hammer；14th, concrete grout；15th, straight spiral shell
Stricture of vagina sleeve pipe；16th, stud.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention, rather than the embodiment of whole.Present invention enforcement generally described and illustrated in accompanying drawing herein
The component of example can be arranged and designed with a variety of configurations.Therefore, reality of the invention below to providing in the accompanying drawings
The detailed description for applying example is not intended to limit the scope of claimed invention, but is merely representative of the selected enforcement of the present invention
Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
Every other embodiment, belongs to the scope of protection of the invention.
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Below with reference to accompanying drawings the present invention is further illustrated with specific embodiment.
As shown in figure 1, a kind of conehead muscle body posttension pile foundation of the embodiment of the present invention, including the pile body formed by concrete
1, the shape such as being shaped as pile body 1 is cylindric, Bamboo-shaped, the center of the pile body 1 is provided with muscle body 2, and muscle body can be answered using pre-
The rhabodoids made by material such as power fining twisted steel, prestressing force round steel, high-strength bolt, the outer sheath of the muscle body 2 be equiped with every
From sleeve pipe 3, disrance sleeve 3 is pvc pipe, PE pipes, thermoplastic tube or steel pipe etc., for isolation bar body and concrete, forms conehead muscle
Body posttension pile foundation.
The top of the muscle body 2 is passed pile body 1 and is locked by anchorage 4, and the bottom of the muscle body 2 is provided with thick middle surrounding
The thin body 5 that casts anchor, the body 5 that casts anchor is conical structure (as illustrated in figures 2a and 2b), pyramidal structure or cross wimble structure (as schemed
Shown in 3a and 3b), for example straight cone of the conical structure or round platform, pyramidal structure such as Rhizoma Sparganii cone, rectangular pyramid, pentagonal pyramid
Many terrace with edges such as the polygonal pyramid bodies such as body, hexagonal pyramid body or three terrace with edges, truncated rectangular pyramids, five terrace with edges, cross wimble structure includes equal around muscle body 2
The flank 6 of even distribution, the shape of cross section of the flank 6 is T-shaped (as shown in Figure 3 a).
Further illustrate the attachment structure casted anchor between body 5 and muscle body 2 as a example by casting anchor body 5 for straight cone below：
As illustrated in figures 2a and 2b, cast anchor be connected with muscle body 2 on body 5 center of junction is provided with internal thread hole 8, muscle body 2
Connection end is provided with the external screw thread being engaged with the internal thread hole 8, muscle body 2 is inserted in internal thread hole 8, and with the body 5 that casts anchor
Removably it is fixedly connected, when the use time of muscle body 2 is long, muscle body 2 can be reversely rotated when will reach life termination, to muscle body
2 are changed, it is to avoid muscle body 2 ruptures and needs to destroy the problem on basis, and later maintenance cost greatly reduces, and improves
The service life on basis.
The connection boss 9 for fixing the disrance sleeve 3 is provided with around the periphery of internal thread hole 8 on the body 5 that casts anchor,
The outside of connection boss 9 is provided with external screw thread, is provided with the connection end of disrance sleeve 3 and is connected the female thread that boss 9 is engaged, and makes
Disrance sleeve 3 is threadedly coupled with the body 5 that casts anchor, and realizes the Fast Installation of disrance sleeve 3, and realizes the close of the bottom of disrance sleeve 3
Envelope, is that later stage dismounting muscle body creates conditions.
As shown in Figure 4,5, install muscle body during, in order to quickness and high efficiency realize muscle body 2 it is rear plant into, while
In order to avoid muscle body is inserted directly into the damage caused with concrete friction etc., in the outer cover of disrance sleeve 3 protection sleeve pipe is equiped with
11, the outside that boss 9 is connected on the body 5 that casts anchor is provided with the guiding boss 10 moved for guiding protective sleeve pipe 11, the protective case
One end of pipe 11 is sleeved on guiding boss 10, another section of connection vibration hammer 13 of the protection sleeve pipe 11, when muscle body is installed
Muscle body is driven in concrete grout 14 by vibration, and protection sleeve pipe 11 moves reciprocatingly along the guiding boss 10, that is, protect
Sleeve pipe 11 vibrates the body 5 that casts anchor, and the body 5 that casts anchor is shaken in concrete grout 14, plays a part of to protect muscle body 2, it is therefore prevented that muscle body
The situation of the bending of muscle body 2 during shaking under, it is therefore prevented that disrance sleeve 3 rubs and the situation of breakage with concrete grout 14, treats muscle
Shake to after specified location under body and directly extract protection sleeve pipe 11 using suspender lifting, realize the recycling of protection sleeve pipe 11, reduce
Construction cost.
As shown in Fig. 4,6, the protection sleeve pipe 11 is provided with around the protection equally distributed locating support of sleeve pipe 11
7, the locating support 7 is at least 2, is separately positioned on protective case perpendicular to the protection sleeve pipe 11, the quantity of locating support 7
The both sides up and down of pipe 11, for limit protection sleeve pipe 11 fix with the distance of the wall of surrounding location hole 12, it is equal, make protection sleeve pipe 11
Positioned at the center of location hole 12, even if conical head muscle body is moved down along the center vertical of location hole 12, conical head is prevented
The problem of muscle body oblique cutting because of both sides unbalance stress.
The construction technology of the conehead muscle body posttension pile foundation of the present invention is that joint bar body is applied after the pressure concrete injecting of long spire pore-forming center
Work technique, as shown in figure 9, its technological process is followed successively by：Surveying setting-out determine the drilling in place of hole position, rig, long screw drill rod drilling,
Coagulation soil pressure is filled, conical head muscle body is inserted, applies reinforcing body pretightning force.
The method of surveying setting-out fixed pile：
Smooth location first, surveying setting-out determines hole position on smooth location, and two ends measuring instrument is carried out location hole, prevented
Being checked at any time during deviation occurs in hole position；Determine hole position and typically make a call to a deep hole on the ground with drill rod or card punch, pour into albarium powder,
The distinguishing marks such as reinforcing rod are plugged at hole position.
The method of rig drilling in place：
Method is hammered into shape respectively from both sides to rig leveling, it is ensured that rig level, using two-wire while the perpendicularity for adjusting drilling tool is inclined
Difference is within specification allowed band.Depending on soil layer, water level, local environmental conditions drilling in turn or " jump is beaten " can be taken (one can be jumped
Individual hole or multiple holes).Pore-forming technique selects using rotary drilling rig, dives in addition to using long-spiral drilling machine also dependent on formation properties
The different process such as drift rig, manually digging hole are carried out.
The method of long screw drill rod drilling：
Depth is marked according to design, rig keeps long screw drill rod uniform rotation in boring procedure, it is at the uniform velocity lower to bore, and
Using concrete transfer pump by the press-in hole of delivery pipe Jing drilling tool center, first drilling tool slightly being stopped before pressure concrete injecting, it is ensured that bore door by deadweight
Fully open, then pressure concrete injecting, it is ensured that concrete burying has at least 0.5m, back lift drilling tool side press-in concrete, it is special during construction
Notice that the lifting speed of drilling tool is adapted with the concrete amount of press-in, carrying drilling speed degree should be by the uniform velocity controlling, and putting forward pipe speed should control 1.2
～1.5m/min or so, meets saturated sand or powder soil horizon, must not termination of pumping wait to expect, while slow down carry drilling speed degree, such as silt soil or
Muck soil, carrying drilling speed degree also should suitably slow down.
The method of conical head muscle body insertion：
First the conical head body 5 that casts anchor is fixed on into one end of muscle body 2, then separation sleeve pipe box 3 is mounted on muscle body 2, and will be every
Fix with boss 9 is connected from sleeve pipe 3, obtain conical head muscle body assembly；In order to avoid conical head muscle body assembly is in decentralization process
Because lowering velocity is too fast or lifts the situation that non-consolidation causes conical head muscle body assembly to offset, need in this step in taper
Several equally distributed locating supports are installed on head muscle body assembly, preferred technical scheme is the top of muscle body rod body, middle part,
Bottom both sides are required to install locating support, and the quantity of locating support is at least 3, and locating support is tied up by tied silk and is fixed on
On muscle body rod body 2.
As shown in fig. 7, the upper end of conical head muscle body assembly is removably solid with vibration hammer 13 by straight thread sleeve pipe 15
Fixed connection, the i.e. connection end of vibration hammer 13 is provided with stud 16, and stud 16 is threadedly coupled with straight thread sleeve pipe 15, by muscle body 2 with it is straight
Threaded sleeve 15 is threadedly coupled, and realizes that conical head muscle body assembly is fixedly connected with vibration hammer 13, and using suspender vibration hammer 13 is lifted by crane,
Make conical head muscle body assembly be provided with conical head cast anchor body 5 one end straight down, constitute conical head muscle body lowering system；In order to keep away
Exempt from muscle body 2 or disrance sleeve 3 is caused damaged surfaces in decentralization process by the friction of concrete, so as to cause disrance sleeve
3 damages or the damaged surfaces of muscle body 2, cause the intensity decreases of muscle body 2, therefore in order to solve this defect, as shown in figure 8, can
Protective case pipe 11 is set with the outside of conical head muscle body assembly, and protection sleeve pipe 11 is connected with guiding boss 10, will be protected
The upper end of protecting pipe 11 is fixedly connected with vibration hammer 13.
Conical head muscle body lowering system is slowly transferred and alignment hole center, and hanging down for conical head muscle body is kept during hanging
Directly；
Conical head muscle body bottom is entered after concrete, it is slow first under the Gravitative Loads of conical head muscle body lowering system under
Put；When transfer to can not sink naturally after, open vibration hammer, with vibration be controlled conical head muscle body decentralization depth；Shaking
During dynamic, it is ensured that steel wire rope band power all the time is lifted, in case conical head muscle body inclines insertion；Reach and stop shaking after projected depth
It is dynamic, dismantle and extract protection sleeve pipe 11.
Lift vibration hammer：Bian Tibian vibrates during vibration hammer lifts, by the uniform velocity controlling, after vibration hammer is proposed, using people
Work or mechanical system supply stake top for vacant section, vibrate.
Spoir is transported outward：Native clearly using little excavator, forklift is put together in time, and night is transported to specified spoir point.
The method for applying reinforcing body pretightning force：After concrete reaches solidification requirement, the jack cylinder of tensioner shrinks
To original position, the upper end that intermediate plate bites muscle body 2 is engaged with jack, starting tensioning pump jack makes oil cylinder overhanging, positioned at upper
The anchorage 4 for holding muscle body 2 is acted against on muscle body supporting plate under the outer top surface effect of jack, continues to pressurize, the occlusion inside jack
Mechanism stings tight muscle body 2 and is pulled outwardly, and when the oil gauge on tensioner reaches setting pressure, release, release, complete muscle body pretension
The applying of power.
Finally it should be noted that：Above-described each embodiment is merely to illustrate technical scheme, rather than to it
Limit；Although being described in detail to the present invention with reference to the foregoing embodiments, it will be understood by those within the art that：
It still can modify to the technical scheme described in previous embodiment, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence disengaging various embodiments of the present invention technical side of appropriate technical solution
The scope of case.
Claims (11)
1. a kind of conehead muscle body posttension pile foundation, it is characterised in that：Including pile body, the center of the pile body sets muscle body, described
The outer sheath of muscle body is equiped with disrance sleeve, and the top of the muscle body is passed pile body and locked by anchorage, the bottom of the muscle body
End is provided with the thin taper of thick middle surrounding and casts anchor body.
2. conehead muscle body posttension pile foundation according to claim 1, it is characterised in that：It is described to cast anchor body for cone knot
Structure, pyramidal structure or cross wimble structure.
3. conehead muscle body posttension pile foundation according to claim 2, it is characterised in that：Connect with muscle body phase on the body that casts anchor
The center of junction is provided with internal thread hole, and the connection end of the muscle body is provided with the external screw thread being engaged with the internal thread hole.
4. the conehead muscle body posttension pile foundation according to any one in claim 1-3, it is characterised in that：The body that casts anchor
The connection boss of the fixation disrance sleeve is provided with, is threaded connection between the disrance sleeve and connection boss.
5. conehead muscle body posttension pile foundation according to claim 4, it is characterised in that：Connection is located on the body that casts anchor convex
Be provided with the outside of platform for guiding protective sleeve pipe movement guiding boss, the protection casing pipe sleeve outside disrance sleeve, the guarantor
One end of protecting pipe is sleeved on the guiding boss, and can be moved reciprocatingly along the guiding boss, the protection sleeve pipe
The other end connects vibration hammer.
6. according to the conehead muscle body posttension pile foundation described in claim 5, it is characterised in that：The protection sleeve pipe is provided with and encloses
Around the equally distributed locating support of the protection sleeve pipe, the locating support is perpendicular to the protection sleeve pipe.
7. joint bar body construction technique after a kind of long spire pore-forming center pressure concrete injecting, it is characterised in that its technological process is followed successively by：Survey
Amount unwrapping wire determines the drilling in place of hole position, rig, long screw drill rod drilling, coagulation soil pressure is filled, conical head muscle body is inserted, it is pre- to apply reinforcing body
Clamp force.
8. joint bar body construction technique after long spire pore-forming center pressure concrete injecting according to claim 7, it is characterised in that include
Following steps：
First the conical head body that casts anchor is fixed on into one end of muscle body, then disrance sleeve is sleeved on muscle body, and by disrance sleeve with
Connection boss is fixed, and obtains conical head muscle body assembly；
The upper end of conical head muscle body assembly is fixedly connected with vibration hammer, using suspender vibration hammer is lifted by crane, make conical head muscle body total
Into be provided with conical head cast anchor body one end straight down, constitute conical head muscle body lowering system；
Conical head muscle body lowering system is slowly transferred and alignment hole center, and the vertical of conical head muscle body is kept during hanging；
Conical head muscle body bottom is entered after concrete, is slowly transferred under the Gravitative Loads of conical head muscle body lowering system first；
When transfer to can not sink naturally after, open vibration hammer, with vibration be controlled conical head muscle body decentralization depth；Vibrated
Cheng Zhong, it is ensured that steel wire rope band power all the time is lifted, in case conical head muscle body inclines insertion；Reach and stop after projected depth vibration, lead to
Cross rotation straight screw sleeve dismounting vibration hammer.
9. joint bar body construction technique after long spire pore-forming center pressure concrete injecting according to claim 8, it is characterised in that in institute
State before conical head muscle body assembly is fixedly connected with vibration hammer and comprise the following steps：
Protective case pipe is set with the outside of conical head muscle body assembly, and protection sleeve pipe is connected with guiding boss, will be protected
The upper end of sleeve pipe is fixedly connected with vibration hammer.
10. joint bar body construction technique after long spire pore-forming center pressure concrete injecting according to claim 8 or claim 9, it is characterised in that
Before the step of conical head muscle body assembly is fixedly connected with vibration hammer, install some fixed on the conical head muscle body assembly
Position support, locating support is tied up by tied silk and is fixed on conical head muscle body assembly.
Joint bar body construction technique after 11. long spire pore-forming center pressure concrete injectings according to claim 7, it is characterised in that institute
State the method for applying reinforcing body pretightning force：After concrete reaches solidification requirement, the jack cylinder of tensioner is retracted to starting
Position, with jack the upper end that intermediate plate bites muscle body is engaged, and starting tensioning pump jack makes oil cylinder overhanging, positioned at upper end muscle body
Anchorage is acted against on muscle body supporting plate under the outer top surface effect of jack, continues to pressurize, and the occlusion mechanism inside jack stings tight muscle
Body is pulled outwardly, and when the oil gauge on tensioner reaches setting pressure, release, release, complete the applying of muscle body pretightning force.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107245997A (en) * | 2017-08-09 | 2017-10-13 | 陕西桩鑫建设工程有限公司 | A kind of Dense Broken Stone Peg pile-forming equipment and bore forming method |
| CN108301428A (en) * | 2018-03-23 | 2018-07-20 | 健安诚（内蒙古）新能源科技有限公司 | The pre- tensioning post-tensioning pile foundation of stake top and construction technology |
| CN108360514A (en) * | 2018-04-12 | 2018-08-03 | 河海大学 | A kind of double-layer nested dish-shaped enlarged footing anchor pole of rotary squeezing and its application method |
| CN109183786A (en) * | 2018-10-16 | 2019-01-11 | 徐畅宇 | A kind of post-tensioned prestressing resistance to plucking small diameter long screw pouring piles and its construction method |
| CN109944244A (en) * | 2019-04-16 | 2019-06-28 | 安徽同济建设集团有限责任公司 | A kind of anti-float anchor rod and its construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107245997A (en) * | 2017-08-09 | 2017-10-13 | 陕西桩鑫建设工程有限公司 | A kind of Dense Broken Stone Peg pile-forming equipment and bore forming method |
| CN108301428A (en) * | 2018-03-23 | 2018-07-20 | 健安诚（内蒙古）新能源科技有限公司 | The pre- tensioning post-tensioning pile foundation of stake top and construction technology |
| CN108360514A (en) * | 2018-04-12 | 2018-08-03 | 河海大学 | A kind of double-layer nested dish-shaped enlarged footing anchor pole of rotary squeezing and its application method |
| CN108360514B (en) * | 2018-04-12 | 2020-07-07 | 河海大学 | Rotary extrusion double-layer nested dish-shaped enlarged footing anchor rod and use method thereof |
| CN109183786A (en) * | 2018-10-16 | 2019-01-11 | 徐畅宇 | A kind of post-tensioned prestressing resistance to plucking small diameter long screw pouring piles and its construction method |
| CN109944244A (en) * | 2019-04-16 | 2019-06-28 | 安徽同济建设集团有限责任公司 | A kind of anti-float anchor rod and its construction method |
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