CN109137894A - A kind of bored grouting steel pipe pile construction method to be followed up using casing overall length - Google Patents
A kind of bored grouting steel pipe pile construction method to be followed up using casing overall length Download PDFInfo
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- CN109137894A CN109137894A CN201811072738.3A CN201811072738A CN109137894A CN 109137894 A CN109137894 A CN 109137894A CN 201811072738 A CN201811072738 A CN 201811072738A CN 109137894 A CN109137894 A CN 109137894A
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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
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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Abstract
The invention discloses a kind of bored grouting steel pipe pile construction methods to be followed up using casing overall length, the construction of stake holes is carried out using the overall length follow-up bore mode of step S2, so that thering is casing to be supported stake holes in the pore-forming overall process of stake holes, it avoids and occurs collapse hole undergauge phenomenon in boring procedure, it ensure that the pile stake diameter in later period is accurate, it and is not in broken pile and other issues, and, without mud off pore-forming, substantially reduce the pore-forming time, mud emission amount, it accelerates construction progress, therefore, the present invention is able to solve in layer of sand, collapse hole undergauge problem when metalling drilling construction, it solves in layer of sand, slurries losing issue when metalling mortar depositing construction, the grouting steel pipe pile bearing capacity of formation is high, it is guaranteed, it can be used in house foundation basic reinforcing engineering.
Description
Technical field
The present invention relates to a kind of bored grouting steel pipe pile construction methods to be followed up using casing overall length.
Background technique
Currently, society is constantly advancing, and scientific and technical innovation is being constantly progressive, and Building Trade in China experienced different times
Development, China's building is increasing, and people's production and life to building requirements improve, the building that the past builds, building mark
Quasi- and technology has been updated substitution, is not able to satisfy the demand of social development using function, and because of add-story reconstruction and unevenly heavy
Reasons, the structural reliabilities such as drop cannot be met the requirements, and needed to improve foundation bearing capacity, met the safety of building.In reality
It is a kind of using the bored grouting steel-pipe pile that casing overall length follows up to avoid collapse hole undergauge in the undesirable stratum of soil property in trampling
More commonly used processing method.
Mini pile generally refers to form the tree root that diameter is not more than 300mm in soil with piling machinery or other small devices
Stake, pre-cast concrete mortar pile or steel-pipe pile.Had using casing overall length follow-up bored grouting steel-pipe pile to building foundation
Effect processing, by bored grouting steel pipe pile driving construction, makes foundation be able to bear the load that bigger top is transmitted.
Summary of the invention
The technical problems to be solved by the present invention are: provide it is a kind of using casing overall length follow-up bored grouting steel-pipe pile apply
Work method.
Above-mentioned technical problem is solved, the technical solution adopted in the present invention is as follows:
A kind of bored grouting steel pipe pile construction method to be followed up using casing overall length forms stake holes and in the stake for constructing
Construction forms grouting steel pipe pile in hole, wherein the stake holes gos deep into rock stratum to the slip casting steel after penetrating soil layer downwards by earth's surface
The bearing course at pile end designed elevation of tubular pole, it is characterised in that: the bored grouting steel pipe pile construction method includes:
Step S1, more piece casing and more piece pile body steel pipe are prepared, wherein the outer diameter of described sleeve pipe is equal to the hole of the stake holes
Diameter, the outer diameter of the pile body steel pipe are less than the internal diameter of described sleeve pipe；
Step S2, it with drilling machine and more piece drilling rod, constructs according to overall length follow-up bore mode, to form the stake holes,
The overall length follow-up bore mode are as follows:
Step A, drilling rod described in Section 1 and Section 1 described sleeve pipe are connected on the drilling machine, so that Section 1 institute
The axial location that drilling rod is located inside Section 1 described sleeve pipe is stated, and the lower end of drilling rod described in Section 1 is equipped with main drill bit, it is described
The lower end of Section 1 described sleeve pipe is equipped with pipe bit, the bore size and described sleeve pipe of the main drill bit and pipe bit
Outer diameter is equal；
Step B, it drives the main drill bit to be drilled downwards by the earth's surface by drilling rod described in Section 1 with the drilling machine, makes
It obtains described sleeve pipe drill bit and Section 1 described sleeve pipe follows the main drill bit downward；Also, it is controlled after reaching scheduled advanced depth
It makes the drilling machine to stop, so that Section 1 described sleeve pipe is embedded in the drilling that the main drill bit bores out, and being covered described in Section 1
Expose in the earth's surface upper end of pipe；
Step C, the connection for unclamping drilling rod and the i-th section described sleeve pipe and the drilling machine described in the i-th section, will be described in i+1 section
The lower end of drilling rod is coaxial with the upper end of drilling rod described in the i-th section to be connected and fixed, by the lower end of i+1 section described sleeve pipe and the i-th section institute
State casing upper end it is coaxial be connected and fixed, also, drilling rod described in i+1 section and i+1 section described sleeve pipe are connected to institute
It states on drilling machine；Wherein, i is the quantity for the described sleeve pipe having already embedded in the drilling that the main drill bit bores out；
Step D, the main drill bit is driven to drill downwards by drilling rod described in Section 1 to i+1 section with the drilling machine, so that
Described sleeve pipe drill bit and Section 1 to i+1 section described sleeve pipe follow the main drill bit downward；Also, reaching scheduled drilling depth
It controls the drilling machine after depth to stop, so that Section 1 is embedded in the drilling that the main drill bit bores out to i+1 section described sleeve pipe
In, and the upper end of i+1 section described sleeve pipe is exposed in the earth's surface；
Step E, repeating said steps C and step D, until elongated set of the Section 1 to the n-th connected formation of section described sleeve pipe
Pipe is embedded in the drilling that the main drill bit bores out, wherein n is the positive integer greater than 1, and the value of n meets: Section 1 institute
The lower end for stating casing reaches the bearing course at pile end designed elevation of the grouting steel pipe pile；At this point, the brill that the main drill bit bores out
Hole is the stake holes；
Step S3, borehole cleaning is carried out to the stake holes, to remove the mud formed in the stake holes when drilling, also, first
Control the drilling machine by the stake holes the whole drilling rod and main drill bit take out, then pile body steel pipe described in more piece put one by one
Enter in the stake holes, and respectively saves the pile body steel pipe and be sequentially connected end to end composition steel pipe pile body, the steel pipe pile body by order is put into
Coaxial with the stake holes, the lower end of the steel pipe pile body extends to the bottom hole of the stake holes, upper end is exposed in the earth's surface, wherein
In addition to this cement-free mortar recirculation hole on the top pipeline section of the steel pipe pile body forms the remaining pipe of the steel pipe pile body
Multiple cement mortar recirculation holes, the top pipe of the steel pipe pile body are offered on pile body steel pipe described in each section of section
The vertical extension of section is in 2m between 3m；
Step S4, cement injection mortar in the steel pipe pile body formed to the pile body steel pipe described in more piece, and take out described logical
Long casing enables the cement mortar fill the steel pipe pile body, and the cement mortar passes through the cement mortar recirculation hole stream
Enter and fill the stake holes, so that the cement mortar inside and outside the steel pipe pile body solidifies to form cement mortar pile body, and the cement
Mortar pile body forms the grouting steel pipe pile in conjunction with the steel pipe pile body that the pile body steel pipe described in more piece forms.
As the preferred embodiment of the present invention: in the top and bottom of described sleeve pipe any one be equipped with internal thread tooth,
Another one is equipped with outer silk tooth, and the upper end of the lower end of i+1 section described sleeve pipe and the i-th section described sleeve pipe passes through silk tooth connection type company
Connect fixation；The both ends of the pile body steel pipe are respectively equipped with internal thread tooth and outer silk tooth, and pile body steel pipe described in two adjacent sections passes through silk tooth
Connection type is connected and fixed.
As the preferred embodiment of the present invention: overall length used by the step S2 follows up in bore mode, first uses
Three leaf drill bits drill to the soil layer as the main drill bit, to the three leaves drill bit can not drilling depth, i.e. three leaf bores
When head penetrates the soil layer and is drilled into the rock stratum, replacement drill hammer is as the main drill bit, with matched using the drilling machine
Air compressor carries out percussive drilling to the rock stratum；Also, the drilling machine is track-mounted drill, Section 1 described sleeve pipe
The pipe bit installed of lower end be wolf's fang drill bit.
As the preferred embodiment of the present invention: in the step S3, carrying out borehole cleaning to the stake holes includes a borehole cleaning,
That is: when carrying out percussive drilling using the drill hammer as main drill bit, the borehole cleaning function of being carried with the air compressor will
Outstanding slag and sediment cleaning in the stake holes displace the earth's surface and drain.
As the preferred embodiment of the present invention: each the cement mortar recirculation hole opened up on the pile body steel pipe is equal
For circular hole, the arrangement of whole cement mortar recirculation holes on pile body steel pipe described in a section are as follows: setting multiple row cement mortar stream
Through-hole column, each column cement mortar recirculation hole column are arranged comprising multiple axis direction uniform intervals along the pile body steel pipe
Cement mortar recirculation hole, and to arrange included cement mortar circulation hole number equal for each column cement mortar recirculation hole,
It respectively arranges the cement mortar recirculation hole and arranges axis uniform intervals arrangement around the pile body steel pipe, and the adjacent two column cement bonded sand
The up and down direction identical cement mortar recirculation hole that sorts is mutually staggered along the axis direction of the pile body steel pipe in slurry recirculation hole.
As the preferred embodiment of the present invention: in the step S4, to the steel pipe that pile body steel pipe forms described in more piece
In pile body the step of cement injection mortar, comprising:
Step S4-1, once grouting pipe is protruded into the steel pipe pile body that the pile body steel pipe described in more piece forms, and described one
The lower port of secondary Grouting Pipe extends to the bottom hole of the stake holes；
Step S4-2, once grouting is carried out, it may be assumed that cement mortar is passed through described one by the upper port of the once grouting pipe
Secondary Grouting Pipe is lasting to be filled into the steel pipe pile body, meanwhile, the n-th section to Section 1 described sleeve pipe is successively drawn to described
Outside stake holes, and the once grouting pipe is increased with the liquid level of the cement mortar and is mentioned upwards, enables the once grouting pipe
Lower port is maintained at the position of the liquid level of the cement mortar or less 2m to 6m, until whole n section described sleeve pipe is extracted, and
After the cement mortar fills the steel pipe pile body and the stake holes, the once grouting pipe is taken out completely from the steel pipe pile body
Out.
As the preferred embodiment of the present invention: in the step S3, it further includes secondary clear for carrying out borehole cleaning to the stake holes
Hole, it may be assumed that into the steel pipe pile body before cement injection mortar, clear water is pressed into the stake holes by the once grouting pipe
Sediment in the stake holes is diluted and the earth's surface is discharged by bottom hole.
As the preferred embodiment of the present invention: in the step S4, to the steel pipe that pile body steel pipe forms described in more piece
In pile body the step of cement injection mortar, further includes:
In the step S4-1, secondary grouting pipe and the once grouting pipe are protruded into together in the steel pipe pile body, and
The lower port of the secondary grouting pipe extends to the bottom hole of the stake holes；Wherein, multiple cement are offered on the secondary grouting pipe
Recirculation hole is starched, and the cement slurry recirculation hole that the secondary grouting pipe is opened up is encased with adhesive plaster；
Step S4-3 after completing the step S4-2, carries out secondary grouting before the cement mortar final set, it may be assumed that will be pure
Cement slurry is pressed into the secondary grouting pipe from upper port, and pressure when being pressed into using the neat slurry unclamps the adhesive plaster pair
The closure of the cement slurry recirculation hole, so that the neat slurry penetrates into the cement mortar by the cement slurry recirculation hole
In, to compensate the space shunk when the cement mortar solidifies, the cement mortar and neat slurry using the neat slurry
Solidification forms the cement mortar pile body, and the secondary grouting pipe is embedded in the steel pipe pile body.
Wherein, preferred: the ratio between water and cement of the neat slurry are 0.7:1.
As the preferred embodiment of the present invention: the once grouting pipe uses galvanized pipe, and the secondary grouting pipe uses
Hose.
Compared with prior art, the invention has the following advantages:
First, the present invention carries out the construction of stake holes using the overall length follow-up bore mode of step S2, so that the pore-forming of stake holes
There is casing to be supported stake holes in overall process, avoids and occur collapse hole undergauge phenomenon in boring procedure, ensure that the later period
Pile stake diameter it is accurate, and be not in broken pile and other issues, moreover, being not necessarily to mud off pore-forming, substantially reduce pore-forming
Time, accelerates construction progress mud emission amount, and therefore, the present invention can be avoided collapse hole undergauge, increase substantially an end carrying
Power, it is significant improve foundation bearing capacity, and can reduce that field operation, construction is simple are quick, shorten construction period.
Second, the present invention grouting steel pipe pile to be formed of constructing can satisfy the needs of building foundation bearing capacity, pile body
Intensity is high, practical, suitable for being widely used to promote, can efficiently reduce differential settlement, meet structural safety and function
It can require.
Third, elongated casing of the invention are made up of more piece casing silk tooth connection type, and steel pipe pile body is by more piece stake
Body steel pipe is made up of silk tooth connection type, and the processing of internal thread tooth and outer silk tooth is completed in factory, and construction site need to only carry out silk
Tooth connection reduces construction site welding, reduces occupational health hazards, reduce a large amount of Contraction in Site, shortens work
Phase, while also greatly improving the verticality of stake.
4th, elongated casing of the invention is made up of more piece casing silk tooth connection type, is taken out in step S4 elongated
When casing, elongated casing easily can be split as more piece casing, in order to the recycling to casing, reduce cost.
In conclusion the present invention is able to solve the collapse hole undergauge problem in layer of sand, metalling drilling construction, solve in sand
The grouting steel pipe pile bearing capacity of slurries losing issue when layer, metalling mortar depositing construction, formation is high, guaranteed, with can be used for house
In base basic reinforcing engineering.
Detailed description of the invention
The following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments:
Fig. 1-1 is the structural schematic diagram of middle sleeve 1 of the present invention；
Fig. 1-2 is the structural schematic diagram of pile steel pipe 2 of the present invention；
Fig. 2-1 is the schematic diagram to be drilled with three leaf drill bits 5 to soil layer in step S2 of the invention；
Fig. 2-2 is the schematic diagram to be drilled with drill hammer 6 to rock stratum in step S2 of the invention；
Fig. 3-1 is the schematic diagram of step S3 and step S4 of the invention；
Fig. 3-2 is the structural schematic diagram of secondary grouting pipe 8 in the present invention
Fig. 4 is the structural schematic diagram that the present invention completes the grouting steel pipe pile obtained after step S4；
In figure, 1 to the n-th section casing 1 of Section 1 casing is successively denoted as: 11、12、···、1i、1i+1、···、1n；1st
Section 3 to the n-th section drilling rod 3 of drilling rod is successively denoted as: 31、32、···、3i、3i+1、···、3n。
Specific embodiment
Below with reference to embodiment, the invention will be further described:
Embodiment one
As shown in Figures 1 to 4, disclosed by the invention is a kind of bored grouting steel pipe pile driving construction to be followed up using casing overall length
Method forms grouting steel pipe pile for constructing to form stake holes PH and construct in stake holes PH, wherein the stake holes PH is by earth's surface
H0 penetrates downwards the bearing course at pile end designed elevation H2 for going deep into rock stratum H1 to the grouting steel pipe pile after soil layer, the bearing course at pile end
Designed elevation H2 depends on grouting steel pipe pile socket length required in the H1 of rock stratum.
The bored grouting steel pipe pile construction method includes:
Step S1, referring to Fig. 1-1 and Fig. 1-2, more piece casing 1 and more piece pile body steel pipe 2 are prepared, wherein described sleeve pipe 1
Outer diameter is equal to the aperture of the stake holes PH, and the outer diameter of the pile body steel pipe 2 is less than the internal diameter of described sleeve pipe 1；
Step S2 ,-1 and Fig. 2-2 is applied with drilling machine and more piece drilling rod 3 according to overall length follow-up bore mode referring to fig. 2
Work, to form the stake holes PH, the overall length follow-up bore mode are as follows:
Step A, drilling rod 3 described in Section 1 and Section 1 described sleeve pipe 1 are connected on the drilling machine, so that Section 1
The drilling rod 3 is located at the axial location inside Section 1 described sleeve pipe 1, and the lower end of drilling rod 3 described in Section 1 is equipped with main drill bit,
The lower end of Section 1 described sleeve pipe 1 is equipped with pipe bit, and the pipe bit is for avoiding Section 1 described sleeve pipe 1 from drilling
It damages in the process, the bore size of the main drill bit and pipe bit is equal with the outer diameter of described sleeve pipe 1；
Step B, the main drill bit is driven to be drilled downwards by the earth's surface H0 by drilling rod 3 described in Section 1 with the drilling machine,
So that described sleeve pipe drill bit and Section 1 described sleeve pipe 1 follow the main drill bit downward；Also, reaching scheduled advanced depth
After control the drilling machine and stop so that Section 1 described sleeve pipe 1 is embedded in the drilling that the main drill bit bores out, and Section 1 institute
Expose on the earth's surface H0 upper end for stating casing 1；
Step C, the connection for unclamping drilling rod 3 described in the i-th section and the i-th section described sleeve pipe 1 and the drilling machine, by i+1 section institute
State drilling rod 3 lower end it is coaxial with the upper end of drilling rod 3 described in the i-th section be connected and fixed, by the lower end and i-th of i+1 section described sleeve pipe 1
The upper end of section described sleeve pipe 1 is coaxial to be connected and fixed, also, drilling rod 3 described in i+1 section and i+1 section described sleeve pipe 1 are connected respectively
It connects on the drilling machine；Wherein, i is the quantity for the described sleeve pipe 1 having already embedded in the drilling that the main drill bit bores out；
Step D, it drives the main drill bit to drill downwards by drilling rod 3 described in Section 1 to i+1 section with the drilling machine, makes
It obtains described sleeve pipe drill bit and Section 1 to i+1 section described sleeve pipe 1 follows the main drill bit downward；Also, reach it is scheduled into
It controls the drilling machine after ruler depth to stop, so that Section 1 to i+1 section described sleeve pipe 1 is embedded in what the main drill bit bored out
In drilling, and the upper end of i+1 section described sleeve pipe 1 is exposed on the earth's surface H0；
Step E, repeating said steps C and step D, until Section 1 to the n-th section described sleeve pipe 1 connects the elongated of formation
Casing 1 ' is embedded in the drilling that the main drill bit bores out, wherein n is the positive integer greater than 1, and the value of n meets: the 1st
The lower end of section described sleeve pipe 1 reaches the bearing course at pile end designed elevation H2 of the grouting steel pipe pile；At this point, the main drill bit is bored
The drilling opened is the stake holes PH；
Wherein, the operation to be drilled in step S2 with drilling machine is applied according to the operating instruction and existing drilling of drilling machine
Work regulation enforcement, details are not described herein, such as: before drilling, drilling machine should pilot hole hole location in place in；It can be adjusted with guiding ruler
The levelness of whole control drilling machine body controls the verticality of column with the included pointer of guiding ruler and drilling machine front end column simultaneously；Stake
The perpendicularity deviation of hole PH should be not more than 0.5%；Casing 1, reversion pine can be clamped with the clamper that drilling machine front end column carries
Open the silk tooth connection between casing 1, drilling rod 3 and drilling machine.
Step S3, referring to Fig. 3-1, borehole cleaning is carried out to the stake holes PH, is formed in the stake holes PH when drilling with removing
Mud, also, first control the drilling machine by the stake holes PH the whole drilling rod 3 and main drill bit take out, and n section described in
Casing 1 then stays in stake holes PH, then pile body steel pipe 2 described in more piece is put into one by one in the stake holes PH, and respectively save the pile body
Steel pipe 2 is sequentially connected end to end composition steel pipe pile body by order is put into, and the steel pipe pile body is coaxial with the stake holes PH, the steel pipe pile body
Lower end extend to the bottom hole of the stake holes PH, upper end is exposed on the earth's surface H0, wherein the top of the steel pipe pile body manage
In addition to this cement-free mortar recirculation hole 2a in section forms pile body steel described in each section of the remaining pipeline section of the steel pipe pile body
Multiple cement mortar recirculation hole 2a are offered on pipe 2, the vertical extension of the top pipeline section of the steel pipe pile body is in 2m
To between 3m；The cement mortar recirculation hole 2a is opened up on pile body steel pipe 2 to be completed in step sl in factory, can also applied
Work scene carries out.
Step S4, referring to Fig. 3-1 to Fig. 4, priming petock silt particle in the steel pipe pile body that is formed to the pile body steel pipe 2 described in more piece
Slurry, and the elongated casing 1 ' is taken out, enable the cement mortar fill the steel pipe pile body, and the cement mortar is described in
Cement mortar recirculation hole 2a flows into and fills the stake holes PH, so that the cement mortar inside and outside the steel pipe pile body solidifies to form water
Cement mortar pile body 4, and the cement mortar pile body 4 is in conjunction with the steel pipe pile body that the pile body steel pipe 2 described in more piece forms described in formation
Grouting steel pipe pile.
Embodiment two
On the basis of the above embodiment 1, the present embodiment two additionally uses following preferred structure:
In the top and bottom of described sleeve pipe 1 any one be equipped with internal thread tooth 1a, another one be equipped with outer silk tooth 1b, i-th+
The lower end of 1 section described sleeve pipe 1 and the upper end of the i-th section described sleeve pipe 1 are connected and fixed by silk tooth connection type；The pile body steel pipe
2 both ends are respectively equipped with internal thread tooth 2b and outer silk tooth 2c, and pile body steel pipe 2 described in two adjacent sections is solid by the connection of silk tooth connection type
It is fixed.
Wherein, preferred: described sleeve pipe 1 and the length of pile body steel pipe 2 are in 1m between 2m, the internal thread tooth and outer silk
The length of tooth is 100mm.
Embodiment three
On the basis of above-described embodiment one or embodiment two, the present embodiment three additionally uses following preferred structure:
Overall length used by the step S2 follows up in bore mode, referring to fig. 2-1, is first used as institute using three leaf drill bits 5
Main drill bit is stated to drill to the soil layer, to the three leaves drill bit 5 can not drilling depth, i.e., the described three leaves drill bit 5 penetrates the soil
When layer is drilled into the rock stratum H1, referring to fig. 2-2, replacement drill hammer 6 is used as the main drill bit, with matched using the drilling machine
Air compressor to the rock stratum H1 carry out percussive drilling, during percussion drilling, should according to geological conditions, surrounding enviroment,
The requirements such as performance of air compressor control surge, and stratum is avoided to cross large disturbances；Also, the drilling machine is track-mounted drill, described
The pipe bit that the lower end of Section 1 described sleeve pipe 1 is installed is wolf's fang drill bit.
Example IV
On the basis of above-described embodiment three, the present embodiment four additionally uses following preferred structure:
In the step S3, carrying out borehole cleaning to the stake holes PH includes a borehole cleaning, it may be assumed that with the drill hammer 6 work
For main drill bit carry out percussive drilling when, with the air compressor carry borehole cleaning function, by the stake holes PH outstanding slag and
Sediment cleaning displaces the earth's surface H0 and drains, to reduce the mud balance in the stake holes PH.
Embodiment five
On the basis of any one embodiment into example IV of above-described embodiment one, the present embodiment five additionally use with
Preferred structure down:
Referring to Fig. 1-2, each the cement mortar recirculation hole 2a opened up on the pile body steel pipe 2 is circular hole, a section
The arrangement of whole cement mortar recirculation hole 2a on the pile body steel pipe 2 is quincuncial arrangement mode, it may be assumed that setting multiple row water
Cement mortar recirculation hole column, each column cement mortar recirculation hole column are equal comprising multiple axis directions along the pile body steel pipe 2
Even spaced apart cement mortar recirculation hole 2a, and each column cement mortar recirculation hole arranges included cement mortar circulation
Hole 2a quantity is equal, respectively arranges the cement mortar recirculation hole and arranges axis uniform intervals arrangement around the pile body steel pipe 2, and adjacent
In the two column cement mortar recirculation holes up and down direction sort identical cement mortar recirculation hole 2a along the pile body steel pipe 2 axis
Line direction mutually staggers.
Wherein, preferred: the diameter of the cement mortar recirculation hole 2a is 10mm, each column cement mortar recirculation hole
The spacing distance of the two neighboring cement mortar recirculation hole 2a is 500mm in column, the adjacent two column cement mortar recirculation hole
The middle up and down direction identical cement mortar recirculation hole 2a that sorts along the distance that the axis direction of the pile body steel pipe 2 mutually staggers is
250mm。
Embodiment six
On the basis of any one embodiment into embodiment five of above-described embodiment one, the present embodiment six additionally use with
Preferred structure down:
In the step S4, in the steel pipe pile body that is formed to the pile body steel pipe 2 described in more piece the step of cement injection mortar,
Include:
Step S4-1, referring to Fig. 3-1, once grouting pipe 7 is protruded into the steel pipe pile body that the pile body steel pipe 2 described in more piece forms
It is interior, and the lower port of the once grouting pipe 7 extends to the bottom hole of the stake holes PH；
Step S4-2, once grouting is carried out, it may be assumed that passed through cement mortar by the upper port of the once grouting pipe 7 described
Once grouting pipe 7 is lasting to be filled into the steel pipe pile body, meanwhile, the n-th section to Section 1 described sleeve pipe 1 is successively drawn to
Outside the stake holes, and the once grouting pipe 7 is increased with the liquid level of the cement mortar and is mentioned upwards, enables the once grouting
The lower port of pipe 7 is maintained at the position of the liquid level of the cement mortar or less 2m to 6m, to prevent the quality such as broken pile, folder mud
Problem, until whole n section described sleeve pipe 1 is extracted, and the cement mortar fills the steel pipe pile body and the stake holes PH
Afterwards, the once grouting pipe 7 is fully drawn out from the steel pipe pile body.
Wherein, cement mortar preferably uses M30 cement mortar, and the proportion of cement mortar should meet related specification, regulation is wanted
It asks, the process that the once grouting pipe 7 mentions upwards preferably by the way of Bian Tibian vibration, i.e., mentions once grouting pipe 7 upwards
While pulled and pushed the vibration of mode back and forth.
Embodiment seven
On the basis of above-described embodiment six, the present embodiment seven additionally uses following preferred structure:
In the step S3, carrying out borehole cleaning to the stake holes PH further includes secondary pile hole cleaning, it may be assumed that is filled into the steel pipe pile body
Before filling the water cement mortar, clear water is pressed into the bottom hole of the stake holes PH by the once grouting pipe 7, it will be in the stake holes PH
Sediment dilutes and is discharged the earth's surface H0, to further decrease the mud balance in the stake holes PH.
Embodiment eight
In the step S4, in the steel pipe pile body that is formed to the pile body steel pipe 2 described in more piece the step of cement injection mortar,
Further include:
In the step S4-1, referring to Fig. 3-1 and Fig. 3-2, secondary grouting pipe 8 and the once grouting pipe 7 are stretched together
Enter in the steel pipe pile body, and the lower port of the secondary grouting pipe 8 extends to the bottom hole of the stake holes PH；Wherein, described secondary
Multiple cement slurry recirculation hole 8a, and the cement slurry recirculation hole 8a glue that the secondary grouting pipe 8 is opened up are offered in Grouting Pipe 8
Cloth encases, and causes plugging to prevent the cement mortar being perfused in the step 4-2 from flowing into secondary grouting pipe 8；
Step S4-3 after completing the step S4-2, carries out secondary grouting before the cement mortar final set referring to fig. 4,
That is: neat slurry is pressed into the secondary grouting pipe 8 from upper port, pressure when being pressed into using the neat slurry unclamps institute
Closure of the adhesive plaster to the cement slurry recirculation hole 8a is stated, so that the neat slurry is penetrated by the cement slurry recirculation hole 8a
In the cement mortar, to compensate the space shunk when the cement mortar solidifies using the neat slurry, pile body is improved
Compactness, the cement mortar and neat slurry solidify to form the cement mortar pile body 4, and the secondary grouting pipe 8 is embedded in institute
It states in steel pipe pile body.
Wherein, preferred: the ratio between water and cement of the neat slurry are 0.7:1.
Embodiment nine
On the basis of above-described embodiment eight, the present embodiment nine additionally uses following preferred structure:
The once grouting pipe 7 uses galvanized pipe, and the secondary grouting pipe 8 uses hose.
Wherein, preferred: the cement slurry recirculation hole 8a on the secondary grouting pipe 8 preferably presses above-mentioned quincuncial arrangement mode
It is arranged.
The present invention is not limited to above-mentioned specific embodiment, according to above content, according to the ordinary technical knowledge of this field
And customary means, under the premise of not departing from above-mentioned basic fundamental thought of the invention, the present invention can also make other diversified forms
Equivalent modifications, replacement or change, all fall among protection scope of the present invention.Such as: the cement mortar stream on pile body steel pipe 2
Cement slurry recirculation hole 8a on through-hole 2a or secondary grouting pipe 8 can also be by the arbitrary interval mode except quincuncial arrangement mode
It is arranged, as long as ensuring that cement mortar can effectively be circulated inside and outside pile body steel pipe 2 by cement mortar recirculation hole 2a.
Claims (10)
1. a kind of bored grouting steel pipe pile construction method to be followed up using casing overall length forms stake holes (PH) and at this for constructing
Construction forms grouting steel pipe pile in stake holes (PH), wherein the stake holes (PH) gos deep into rock after penetrating soil layer downwards by earth's surface (H0)
The bearing course at pile end designed elevation (H2) of layer (H1) the extremely grouting steel pipe pile, it is characterised in that: the bored grouting steel pipe
Pile construction method includes:
Step S1, more piece casing (1) and more piece pile body steel pipe (2) are prepared, wherein the outer diameter of described sleeve pipe (1) is equal to the stake
The aperture in hole (PH), the outer diameter of the pile body steel pipe (2) are less than the internal diameter of described sleeve pipe (1)；
Step S2, it with drilling machine and more piece drilling rod (3), constructs according to overall length follow-up bore mode, to form the stake holes
(PH), the overall length follow-up bore mode are as follows:
Step A, drilling rod described in Section 1 (3) and Section 1 described sleeve pipe (1) are connected on the drilling machine, so that Section 1
The drilling rod (3) is located at the internal axial location of Section 1 described sleeve pipe (1), and the lower end of drilling rod described in Section 1 (3) is equipped with
Main drill bit, the lower end of Section 1 described sleeve pipe (1) are equipped with pipe bit, the drilling ruler of the main drill bit and pipe bit
It is very little equal with the outer diameter of described sleeve pipe (1)；
Step B, the main drill bit is driven to be drilled downwards by the earth's surface (H0) by drilling rod (3) described in Section 1 with the drilling machine,
So that described sleeve pipe drill bit and Section 1 described sleeve pipe (1) follow the main drill bit downward；Also, reaching scheduled depth of advance
It controls the drilling machine after degree to stop, so that Section 1 described sleeve pipe (1) is embedded in the drilling that the main drill bit bores out, and the 1st
Expose on the earth's surface (H0) upper end of section described sleeve pipe (1)；
Step C, the connection for unclamping drilling rod (3) and the i-th section described sleeve pipe (1) and the drilling machine described in the i-th section, by i+1 section institute
State drilling rod (3) lower end it is coaxial with the upper end of drilling rod described in the i-th section (3) be connected and fixed, will be under i+1 section described sleeve pipe (1)
End is coaxial with the upper end of the i-th section described sleeve pipe (1) to be connected and fixed, also, will be described in drilling rod described in i+1 section (3) and i+1 section
Casing (1) is connected on the drilling machine；Wherein, i is the set having already embedded in the drilling that the main drill bit bores out
Manage the quantity of (1)；
Step D, the main drill bit is driven to drill downwards by drilling rod (3) described in Section 1 to i+1 section with the drilling machine, so that
Described sleeve pipe drill bit and Section 1 to i+1 section described sleeve pipe (1) follow the main drill bit downward；Also, reach it is scheduled into
The drilling machine is controlled after ruler depth to stop, and is bored out so that Section 1 to i+1 section described sleeve pipe (1) is embedded in the main drill bit
Drilling in, and the upper end of i+1 section described sleeve pipe (1) is exposed on the earth's surface (H0)；
Step E, repeating said steps C and step D, until Section 1 to the n-th section described sleeve pipe (1) connects the elongated set formed
Pipe (1 ') is embedded in the drilling that the main drill bit bores out, wherein n is the positive integer greater than 1, and the value of n meets: the 1st
The lower end of section described sleeve pipe (1) reaches the bearing course at pile end designed elevation (H2) of the grouting steel pipe pile；At this point, the main drill bit
The drilling bored out is the stake holes (PH)；
Step S3, borehole cleaning is carried out to the stake holes (PH), the mud formed in the stake holes (PH) when removing drilling, and
And first control the drilling machine by the stake holes (PH) the whole drilling rod (3) and main drill bit take out, then by stake described in more piece
Body steel pipe (2) is put into one by one in the stake holes (PH), and is respectively saved the pile body steel pipe (2) and be sequentially connected end to end group by being put into order
At steel pipe pile body, the steel pipe pile body is coaxial with the stake holes (PH), and the lower end of the steel pipe pile body extends to the hole of the stake holes (PH)
Bottom, upper end are exposed on the earth's surface (H0), wherein cement-free mortar recirculation hole on the top pipeline section of the steel pipe pile body
(2a), in addition to this, form offered on pile body steel pipe (2) described in each section of the remaining pipeline section of the steel pipe pile body it is multiple
The cement mortar recirculation hole (2a), the vertical extension of the top pipeline section of the steel pipe pile body is in 2m between 3m；
Step S4, the cement injection mortar into the steel pipe pile body that pile body steel pipe (2) forms described in more piece, and take out described elongated
Casing (1 ') enables the cement mortar fill the steel pipe pile body, and the cement mortar passes through the cement mortar recirculation hole
(2a) is flowed into and is filled the stake holes (PH), so that the cement mortar inside and outside the steel pipe pile body solidifies to form cement mortar pile body
(4), and the cement mortar pile body (4) forms the slip casting in conjunction with the steel pipe pile body that pile body steel pipe (2) forms described in more piece
Steel-pipe pile.
2. according to claim 1 using the bored grouting steel pipe pile construction method of casing overall length follow-up, it is characterised in that: institute
Any one stated in the top and bottom of casing (1) is equipped with internal thread tooth, another one equipped with outer silk tooth, i+1 section described sleeve pipe
(1) lower end and the upper end of the i-th section described sleeve pipe (1) are connected and fixed by silk tooth connection type；The two of the pile body steel pipe (2)
End is respectively equipped with internal thread tooth and outer silk tooth, and pile body steel pipe (2) described in two adjacent sections is connected and fixed by silk tooth connection type.
3. the bored grouting steel pipe pile construction method according to claim 1 or claim 2 to be followed up using casing overall length, feature are existed
In: overall length used by the step S2 follows up in bore mode, is first used as the main drill bit to described using three leaf drill bits (5)
Soil layer drills, to the three leaves drill bit (5) can not drilling depth, i.e., the described three leaves drill bit (5) penetrate the soil layer be drilled into it is described
When rock stratum (H1), replacement drill hammer (6) is used as the main drill bit, to utilize the matched air compressor of the drilling machine to described
Rock stratum (H1) carries out percussive drilling；Also, the drilling machine is track-mounted drill, and the lower end of Section 1 described sleeve pipe (1) is pacified
The pipe bit of dress is wolf's fang drill bit.
4. according to claim 3 using the bored grouting steel pipe pile construction method of casing overall length follow-up, it is characterised in that: institute
It states in step S3, carrying out borehole cleaning to the stake holes (PH) includes a borehole cleaning, it may be assumed that using the drill hammer (6) as main brill
When head carries out percussive drilling, the borehole cleaning function of being carried with the air compressor, by the outstanding slag and sediment in the stake holes (PH)
Cleaning displaces the earth's surface (H0) and drains.
5. the bored grouting steel pipe pile construction method according to claim 1 or claim 2 to be followed up using casing overall length, feature are existed
In: each the cement mortar recirculation hole (2a) opened up on the pile body steel pipe (2) is circular hole, pile body steel pipe described in a section
(2) arrangement of whole cement mortar recirculation holes (2a) on are as follows: setting multiple row cement mortar recirculation hole arranges, described in each column
The cement mortar circulation that cement mortar recirculation hole column are arranged comprising multiple axis direction uniform intervals along the pile body steel pipe (2)
Hole (2a), and each included cement mortar recirculation hole (2a) quantity of the cement mortar recirculation hole column that arranges is equal, respectively arranges institute
It states cement mortar recirculation hole and arranges axis uniform intervals arrangement around the pile body steel pipe (2), and the adjacent two column cement mortar
The identical cement mortar recirculation hole (2a) of up and down direction sequence is mutually wrong along the axis direction of the pile body steel pipe (2) in recirculation hole
It opens.
6. the bored grouting steel pipe pile construction method according to claim 1 or claim 2 to be followed up using casing overall length, feature are existed
In: in the step S4, into the steel pipe pile body that pile body steel pipe (2) forms described in more piece the step of cement injection mortar, packet
It includes:
Step S4-1, once grouting pipe (7) is protruded into the steel pipe pile body that pile body steel pipe (2) forms described in more piece, and described
The lower port of once grouting pipe (7) extends to the bottom hole of the stake holes (PH)；
Step S4-2, once grouting is carried out, it may be assumed that cement mortar is passed through described one by the upper port of the once grouting pipe (7)
Secondary Grouting Pipe (7) is lasting to be filled into the steel pipe pile body, meanwhile, the n-th section to Section 1 described sleeve pipe (1) is successively extracted out
Outside to the stake holes, and the once grouting pipe (7) is increased with the liquid level of the cement mortar and is mentioned upwards, enabled described primary
The lower port of Grouting Pipe (7) is maintained at the position of the liquid level of the cement mortar or less 2m to 6m, until whole n saves described sleeve pipe
(1) it is extracted, and after the cement mortar fills the steel pipe pile body and the stake holes (PH), by the once grouting pipe
(7) it is fully drawn out from the steel pipe pile body.
7. according to claim 6 using the bored grouting steel pipe pile construction method of casing overall length follow-up, it is characterised in that: institute
It states in step S3, carrying out borehole cleaning to the stake holes (PH) further includes secondary pile hole cleaning, it may be assumed that the priming petock silt particle into the steel pipe pile body
Before slurry, clear water is pressed into the bottom hole of the stake holes (PH) by the once grouting pipe (7), it will be heavy in the stake holes (PH)
Slag dilutes and the earth's surface (H0) is discharged.
8. according to claim 6 using the bored grouting steel pipe pile construction method of casing overall length follow-up, it is characterised in that: institute
It states in step S4, into the steel pipe pile body that pile body steel pipe (2) forms described in more piece the step of cement injection mortar, further includes:
In the step S4-1, secondary grouting pipe (8) and the once grouting pipe (7) are protruded into together in the steel pipe pile body,
And the lower port of the secondary grouting pipe (8) extends to the bottom hole of the stake holes (PH)；Wherein, it is opened on the secondary grouting pipe (8)
Equipped with multiple cement slurry recirculation holes (8a), and cement slurry recirculation hole (8a) the adhesive plaster packet that the secondary grouting pipe (8) is opened up
Firmly；
Step S4-3 after completing the step S4-2, carries out secondary grouting before the cement mortar final set, it may be assumed that by striaght cement
Slurry is pressed into the secondary grouting pipe (8) from upper port, and pressure when being pressed into using the neat slurry unclamps the adhesive plaster pair
The closure of the cement slurry recirculation hole (8a) so that the neat slurry penetrated by the cement slurry recirculation hole (8a) it is described
In cement mortar, to compensate the space the shunk when cement mortar solidifies using the neat slurry, the cement mortar and
Neat slurry solidifies to form the cement mortar pile body (4), and the secondary grouting pipe (8) is embedded in the steel pipe pile body.
9. according to claim 8 using the bored grouting steel pipe pile construction method of casing overall length follow-up, it is characterised in that: institute
Stating the ratio between water and cement of neat slurry is 0.7:1.
10. according to claim 8 using the bored grouting steel pipe pile construction method of casing overall length follow-up, it is characterised in that:
The once grouting pipe (7) uses galvanized pipe, and the secondary grouting pipe (8) uses hose.
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| CN201811072738.3A CN109137894A (en) | 2018-09-14 | 2018-09-14 | A kind of bored grouting steel pipe pile construction method to be followed up using casing overall length |
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| CN201811072738.3A CN109137894A (en) | 2018-09-14 | 2018-09-14 | A kind of bored grouting steel pipe pile construction method to be followed up using casing overall length |
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| CN111677536A (en) * | 2020-06-30 | 2020-09-18 | 陕西陕煤韩城矿业有限公司 | Method for conveying explosive cartridge anchoring agent in soft coal seam |
| CN111719549A (en) * | 2020-07-06 | 2020-09-29 | 中国石油大学(北京) | Steel pipe cement composite pile and pile forming method and testing method thereof |
| CN115012405A (en) * | 2022-07-20 | 2022-09-06 | 中建八局第二建设有限公司 | Foundation pit supporting method for grouting of perforated pipe pile in stone-nitre area |
| CN115030187A (en) * | 2022-07-20 | 2022-09-09 | 中建八局第二建设有限公司 | Foundation pit supporting method for pipe following construction of steel pipe pile in stone-concrete area |
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| CN111719549A (en) * | 2020-07-06 | 2020-09-29 | 中国石油大学(北京) | Steel pipe cement composite pile and pile forming method and testing method thereof |
| CN115012405A (en) * | 2022-07-20 | 2022-09-06 | 中建八局第二建设有限公司 | Foundation pit supporting method for grouting of perforated pipe pile in stone-nitre area |
| CN115030187A (en) * | 2022-07-20 | 2022-09-09 | 中建八局第二建设有限公司 | Foundation pit supporting method for pipe following construction of steel pipe pile in stone-concrete area |
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