CN107299631A - A kind of constructing device and construction method for superpressure retaining wall cast-in-situ bored pile - Google Patents
A kind of constructing device and construction method for superpressure retaining wall cast-in-situ bored pile Download PDFInfo
- Publication number
- CN107299631A CN107299631A CN201710723553.3A CN201710723553A CN107299631A CN 107299631 A CN107299631 A CN 107299631A CN 201710723553 A CN201710723553 A CN 201710723553A CN 107299631 A CN107299631 A CN 107299631A
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- steel pipe
- top layer
- cast
- bored pile
- situ bored
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
-
- 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
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The present invention provides a kind of constructing device and construction method for superpressure retaining wall cast-in-situ bored pile, and constructing device includes the base, top layer steel pipe and some middle level steel pipes for being cast with embedded steel tube；The two ends that embedded steel tube extends the upper end of base, the lower end of top layer steel pipe, and middle level steel pipe are equipped with the flange mutually fastened and connect for three；Embedded steel tube is internally formed the centre bore entered for cast-in-situ bored pile；The side wall of top layer steel pipe is provided with sludge discharge pipe.During construction, according to mud liquid level rising height is expected, middle level steel pipe and top layer steel pipe are installed successively from the bottom to top on embedded steel tube, the mud tube of connection sedimentation basin is installed on sludge discharge pipe, sludge discharge pipe is mud liquid level rising height apart from ground level.Its advantage is：When facing the complex random systems such as loose crushing, soft, cementing properties be poor, to provide bigger lateral pressure, therefore by mud liquid level lifting, the problems such as being reduced the hole wall collapse that solves to occur in the work progress of cast-in-situ bored pile, aperture.
Description
Technical field
The present invention relates to a kind of device of superpressure retaining wall cast-in-situ bored pile and technique, cast-in-situ bored pile is mainly solved in construction
During the particular problem such as hole wall collapse and hole position deflection.
Background technology
When carrying out construction operation using conventional holing with slurry wall protection bored concrete pile, due to the effect of reservoir stress, to hole wall
Stability can produce large effect.In the presence of reservoir stress, the form for causing hole wall to destroy can be divided into extruding destruction
And tension failure, wherein extruding destruction is main failure mode in drilling construction again.Strata pressure is divided into pressure at right angle and side
Pressure, and it is ground lateral pressure to cause hole wall to produce fall damage, according to, when stratum be loose crushing,
During the poor or soft ground of cementing properties, its lateral pressure is larger, easily unstable phenomenon occurs under lateral pressure effect.Again according to native power
Circular hole stability principle is learned, formula can be obtained by carrying out estimation to the support earth pressure needed for hole wall（For the unit weight of hole wall soil；
M is coefficient, ratio and the internal friction angle of soil with drilling depth H and boring radius RIt is relevant）, therefore when the lifting of mud liquid level is high
During degree increase, support earth pressure also increases, to safeguard the stabilization of hole wall.
The bored pile construction method of any measure is not taken, hole wall easily caves in, or occur aperture shrink, shadow
Pile quality is rung, and it is big on closely constructing special influence.So for the complex random systems such as loose crushing, soft, cementing properties be poor, adopting
Hole wall collapse is prevented with the device and technique of superpressure retaining wall cast-in-situ bored pile, preferable effect can be played.
The content of the invention
The purpose of the present invention is in view of the shortcomings of the prior art, to propose a kind of construction for superpressure retaining wall cast-in-situ bored pile
Device and construction method, when facing the complex random systems such as loose crushing, soft, cementing properties be poor, to provide bigger lateral pressure,
Therefore by mud liquid level lifting lifting, reduced the hole wall collapse that solves to occur in the work progress of cast-in-situ bored pile, aperture etc.
Problem.
In order to reach foregoing invention purpose, present invention firstly provides a kind of construction for superpressure retaining wall cast-in-situ bored pile
Device, is achieved through the following technical solutions：
A kind of constructing device for superpressure retaining wall cast-in-situ bored pile, it is characterised in that：The constructing device is pre- including being cast with
Bury the base, top layer steel pipe and some middle level steel pipes of steel pipe；The caliber phase of the embedded steel tube and top layer steel pipe, middle level steel pipe
Together, the embedded steel tube extends the two ends of the upper end of the base, the lower end of the top layer steel pipe, and the middle level steel pipe
It is equipped with the flange mutually fastened and connect for three；The embedded steel tube is internally formed the centre bore entered for cast-in-situ bored pile, institute
The axis for stating centre bore is located on the base center axis line；The side wall of the top layer steel pipe is provided with sludge discharge pipe, the mud
Discharge pipe end and be provided with flange.
The flange fastens to connect is all provided with elastic sealing gasket outside.
The base is columned reinforced concrete structure, and its outer radius is 3-5 times of cast-in-situ bored pile diameter, and thickness is
1-2m；The center pore radius is more than design hole radius 3-5cm.
The flange of the embedded steel tube be higher by the base top surface 15-20cm, the flange of the embedded steel tube screw it
Between at intervals of 5-15cm.
The joint portion of the sludge discharge pipe and top layer steel pipe is to top layer steel pipe upper end apart from 30-70cm.
In addition, a kind of construction method for superpressure retaining wall cast-in-situ bored pile that the present invention is also proposed, this method is included such as
Lower step：
A, place is reconnoitred, it is determined that the diameter and depth of design hole, and expect mud liquid level rising height；And be based on
Surveys make embedded steel tube, top layer steel pipe and the Duo Gen middle levels steel pipe as described in claim 1-5 any one；
B, smooth hardening is carried out to place, and dug at design hole and build base mounting groove, it is 3-5 that the base, which lays groove radius,
Times cast-in-situ bored pile diameter, depth is 1-2m；
C, 10cm plain concrete cushion layer will be set in the base mounting groove, and reinforcing bar is installed；Laid at the design hole
The embedded steel tube；The base of poured in place concrete formation afterwards；Afterwards according to the expectation mud liquid level rising height, in institute
State and the middle level steel pipe and top layer steel pipe are installed successively from the bottom to top on embedded steel tube, and seal described pre- by elastic sealing gasket
Bury the gap between steel pipe, middle level steel pipe and top layer steel pipe；Connection precipitation is installed on the sludge discharge pipe of the top layer steel pipe
The mud tube in pond, sludge discharge pipe is mud liquid level rising height apart from ground level；
The mud prepared is pressed into the hollow drill pipe of pore-forming equipment by d, slush pump；
E, drilling machine equipment carry out mud Drilling by inverse circulation operation；
F, after after pore-forming to projected depth, then borehole cleaning, steel reinforcement cage is laid, and carries out filling concrete；
G, after the filling concrete of bored concrete pile is completed 48-60 hours, then remove the top layer steel pipe and middle level steel pipe, and the bottom of by
Embedded steel tube Partial Resection above ground level on seat.
The beneficial effects of the invention are as follows：The present invention can generally adapt to that aperture is big, hole depth is big, the drilling of various complex random systems is filled
Note pile driving construction.Compared with conventional bored pile construction, the present invention enables the situation of hole wall collapse largely to suppress, more
The incidence for reducing hole position deflection, aperture is greatly reduced, it is to avoid unnecessary damage to property in work progress.
Flexibly control mud liquid level rising height of the invention, so that the liquid column hydrostatic pressure in control hole, to prevent due to ground
The phenomenons such as hole wall collapse, undergauge that layer is extruded and occurred.And by the fixation of base, solve hole position deflection, aperture and collapse
The problems such as falling into.In device, constructed by the way of superposition, connected between steel pipe, between steel pipe and base by flange, make dress
Overall stability is put to improve.
Brief description of the drawings
By the description carried out below in conjunction with the accompanying drawings to its exemplary embodiment, features described above and advantage of the present invention will become
Obtain more clear and be readily appreciated that.
Fig. 1 is superpressure drilling pile grouting device overall schematic.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, in order to the understanding of technical staff of the same trade：
As shown in figure 1, the present embodiment provides a kind of constructing device for superpressure retaining wall cast-in-situ bored pile first, including：
Base 1
Base 1 is cylinder, and using the reinforced concrete structure of high intensity, its setting time should be greater than 7 days to reach high intensity.
The outer radius of base 1 is 3-5 times of cast-in-situ bored pile diameter, and thickness is 1-2m.The outer rim of base 1 rotates about the axis thereof symmetrical provided with 4
Reserved steel bar ring.Reserved steel bar ring is circular or ellipse, and radius is 3-5cm, and its bottom and the plane of base 1 are tangent.
Base 1 is embedded with embedded steel tube 2.The axis of embedded steel tube 2 is located inside the geometric center of base 1, embedded steel tube 2
Form the centre bore 21 entered for cast-in-situ bored pile, the big 3-5cm of the radius ratio of centre bore 21 design hole radius.On embedded steel tube 2
End is additionally provided with ring flange 22.Ring flange 22 is higher by the top surface 15-20cm of base 1, thereon between screw at intervals of 5-15cm.
Middle level steel pipe 3 and top layer steel pipe 4
Embedded steel tube 2, middle level steel pipe 3 and top layer steel pipe 4 have identical caliber.Wherein：
The lower end of top layer steel pipe 4, and the two ends of middle level steel pipe 3 are equipped with the flange being adapted with ring flange 22.Top layer steel pipe
Side wall away from the 30-70cm of its upper end be provided with sludge discharge pipe 41.The end of sludge discharge pipe 41, which is provided with, to be used to install mud tube
Flange, the radius of sludge discharge pipe 41 is not less than 10cm.
Offered at the top outer rim of top layer steel pipe 4 identical with reserved steel bar number of rings amount（It is 4 in the present embodiment）Pair
Claim the hole of distribution.Distance of each hole away from the top edge of top layer steel pipe 4 is 3-5cm, and the radius of hole is 3-5cm.Pass through steel
The connection ring of the hole of top layer steel pipe 4 and base 1 is attached fixation by cable, to increase its stability.
In addition, preventing the purpose of mud leakage to reach, elastic sealing gasket 5 is all provided with outside all flanges of constructing device.
During assembling, sealed between flange by elastic sealing gasket 5, to play sealing effectiveness.
Below in conjunction with using the novel construction method after the device, above-mentioned constructing device occupation mode is described in detail.
Construction method comprises the following steps：
A, place is reconnoitred, highly determined according to the stability of the soil body, physical and mechanical property, dense state, level of ground water
The diameter and depth of hole are designed, and expects mud liquid level rising height；
And make embedded steel tube 2 as described above, top layer steel pipe 4 and Duo Gen middle levels steel pipe 3 based on surveys；Middle level steel pipe 3
Quantity and length should according to expect mud liquid level rising height be designed；In a preferred embodiment, middle level steel pipe 3 should
It is divided into 2 meters of specifications（Many）With 1 meter of specification（1）, it is how many so no matter to expect mud liquid level rising height, passes through above-mentioned group
Conjunction can be by control errors within 0.5m.
B, smooth hardening is carried out to place, and dug at design hole and build base mounting groove, it is 3-5 that base, which lays groove radius,
Times cast-in-situ bored pile diameter, depth is 1-2m；
C, 10cm plain concrete cushion layer will be set in base mounting groove, and reinforcing bar is installed；Embedded steel tube is laid at design hole
2, the flange of embedded steel tube 2 bassets at least 15-20cm；The base 1 of poured in place concrete formation afterwards；Base 1 has been hardened
Hardened ground 7 is done thereon afterwards；
Afterwards according to mud liquid level rising height is expected, middle level steel pipe 3 and top layer are installed successively from the bottom to top on embedded steel tube 2
Steel pipe 4, and the gap between embedded steel tube 2, middle level steel pipe 3 and top layer steel pipe 4 is sealed by elastic sealing gasket 5.Top layer steel pipe 4
Sludge discharge pipe 41 on install connection sedimentation basin 8 mud tube 6.Now, on top layer steel pipe 4 sludge discharge pipe 41 apart from ground
Highly it is mud liquid level rising height；
The mud prepared is pressed into the hollow drill pipe of pore-forming equipment by d, slush pump 9；
E, drilling machine equipment 10 carry out mud Drilling by inverse circulation operation；
F, after pore-forming is deep to design, then borehole cleaning, steel reinforcement cage is laid, and carries out filling concrete；
G, after the filling concrete of bored concrete pile is completed 48-60 hours, then remove middle level steel pipe 3 and top layer steel pipe 4, and by base
The Partial Resection above ground level of embedded steel tube 2 on 1.
In above-mentioned steps, completed from bored pile construction to filling concrete, mud remains at top layer steel pipe 4
The height of sludge discharge pipe 41 so that the mud pressure in the bored pile construction process mesopore improved.
The beneficial effects of the invention are as follows：The present invention can generally adapt to that aperture is big, hole depth is big, the drilling of various complex random systems is filled
Note pile driving construction.Compared with conventional bored pile construction, the present invention enables the situation of hole wall collapse largely to suppress, more
Greatly reduce hole position deflection, the incidence of undergauge, it is to avoid unnecessary damage to property in work progress.
Flexibly control mud liquid level rising height of the invention, so that the liquid column hydrostatic pressure in control hole, to prevent due to ground
The phenomenons such as hole wall collapse, undergauge that layer is extruded and occurred.And by the fixation of base, solve aperture diminution, aperture and collapse
The problems such as falling into.In device, constructed, connected between steel pillar by flange by the way of superposition, between steel pillar and base
Connected by flange；Further through the further bracing means of wirerope, improve the overall stability of device.
It should be noted that above content is that to combine specific embodiment made for the present invention further specifically
It is bright, it is impossible to assert that the embodiment of the present invention is only limitted to this, under the guidance of above-described embodiment, those skilled in the art can
To carry out various improvement and deformation on the basis of above-described embodiment, and these are improved or deformation falls in protection model of the invention
In enclosing.
Claims (6)
1. a kind of constructing device for superpressure retaining wall cast-in-situ bored pile, it is characterised in that：The constructing device includes being cast with
Base, top layer steel pipe and some middle level steel pipes of embedded steel tube；The caliber phase of the embedded steel tube and top layer steel pipe, middle level steel pipe
Together, the embedded steel tube extends the two ends of the upper end of the base, the lower end of the top layer steel pipe, and the middle level steel pipe
It is equipped with the flange mutually fastened and connect for three；The embedded steel tube is internally formed the centre bore entered for cast-in-situ bored pile, institute
The axis for stating centre bore is located on the base center axis line；The side wall of the top layer steel pipe is provided with sludge discharge pipe, the mud
Discharge pipe end and be provided with flange.
2. a kind of constructing device for superpressure retaining wall cast-in-situ bored pile according to claim 1, it is characterised in that：It is described
Elastic sealing gasket is all provided with outside flange.
3. a kind of constructing device for superpressure retaining wall cast-in-situ bored pile according to claim 1, it is characterised in that：It is described
Base is columned reinforced concrete structure, and its outer radius is 3-5 times of cast-in-situ bored pile diameter, and thickness is 1-2m；In described
Heart pore radius is more than design hole radius 3-5cm.
4. a kind of constructing device for superpressure retaining wall cast-in-situ bored pile according to claim 1, it is characterised in that：It is described
The flange of embedded steel tube be higher by the base top surface 15-20cm, the flange of the embedded steel tube between screw at intervals of 5-
15cm。
5. a kind of noise-measuring system of high-precision box-beam structure according to claim 1, it is characterised in that：The mud
The joint portion of discharge pipe and top layer steel pipe is to top layer steel pipe upper end apart from 30-70cm.
6. a kind of construction method for superpressure retaining wall cast-in-situ bored pile, it is characterised in that this method comprises the following steps：
A, place is reconnoitred, it is determined that the diameter and depth of design hole, and expect mud liquid level rising height；And be based on
Surveys make embedded steel tube, top layer steel pipe and the Duo Gen middle levels steel pipe as described in claim 1-5 any one；
B, smooth hardening is carried out to place, and dug at design hole and build base mounting groove, it is 3-5 that the base, which lays groove radius,
Times cast-in-situ bored pile diameter, depth is 1-2m；
C, 10cm plain concrete cushion layer will be set in the base mounting groove, and reinforcing bar is installed；Laid at the design hole
The embedded steel tube；The base of poured in place concrete formation afterwards；Afterwards according to the expectation mud liquid level rising height, in institute
State and the middle level steel pipe and top layer steel pipe are installed successively from the bottom to top on embedded steel tube, and seal described pre- by elastic sealing gasket
Bury the gap between steel pipe, middle level steel pipe and top layer steel pipe；Connection precipitation is installed on the sludge discharge pipe of the top layer steel pipe
The mud tube in pond, sludge discharge pipe is mud liquid level rising height apart from ground level；
The mud prepared is pressed into the hollow drill pipe of pore-forming equipment by d, slush pump；
E, drilling machine equipment carry out mud Drilling by inverse circulation operation；
F, after after pore-forming to projected depth, then borehole cleaning, steel reinforcement cage is laid, and carries out filling concrete；
G, after the filling concrete of bored concrete pile is completed 48-60 hours, then remove the top layer steel pipe and middle level steel pipe, and the bottom of by
Embedded steel tube Partial Resection above ground level on seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710723553.3A CN107299631A (en) | 2017-08-22 | 2017-08-22 | A kind of constructing device and construction method for superpressure retaining wall cast-in-situ bored pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710723553.3A CN107299631A (en) | 2017-08-22 | 2017-08-22 | A kind of constructing device and construction method for superpressure retaining wall cast-in-situ bored pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107299631A true CN107299631A (en) | 2017-10-27 |
Family
ID=60131934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710723553.3A Withdrawn CN107299631A (en) | 2017-08-22 | 2017-08-22 | A kind of constructing device and construction method for superpressure retaining wall cast-in-situ bored pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107299631A (en) |
-
2017
- 2017-08-22 CN CN201710723553.3A patent/CN107299631A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171027 |
|
| WW01 | Invention patent application withdrawn after publication |