CN109826178A - A kind of cement-soil compaction pile earth filling tamping time control construction method - Google Patents
A kind of cement-soil compaction pile earth filling tamping time control construction method Download PDFInfo
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- CN109826178A CN109826178A CN201910142076.0A CN201910142076A CN109826178A CN 109826178 A CN109826178 A CN 109826178A CN 201910142076 A CN201910142076 A CN 201910142076A CN 109826178 A CN109826178 A CN 109826178A
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Abstract
The present invention provides a kind of cement-soil compaction pile earth filling tamping time control construction method, comprising the following steps: carry out construction site fill and lead up roll it is smooth；Using tunnel or roadbed middle line as main shaft, the center position of multiple compaction piles to be onstructed is determined by surveying and locating；Compacted piling machine is aligned to the center position of one of them compaction pile to be onstructed, using compacted piling machine progress compaction pile drilling construction until hole depth reaches projected depth, withdraws from compacted piling machine；It carries out cement earthen backfill using hammer tamping machine to ram, wherein successively backfill soil cement into compaction pile pore-forming according to predetermined thickness, the soil cement for backfilling every layer is rammed the time and rammed according to predetermined, until backfill is rammed and reaches smooth absolute altitude；The stake top of cement-soil compaction pile is dispelled into reduction to design stake top absolute altitude, to complete the construction of the cement-soil compaction pile；Above step is repeated until completing the construction of whole cement-soil compaction piles.It ensure that construction quality, improve construction efficiency.
Description
Technical field
The present invention relates to technical field of tunnel construction, and in particular to a kind of control of cement-soil compaction pile earth filling tamping time is applied
Work method.
Background technique
During tunnel or subgrade construction, since tunnel or roadbed base stratum are the new loess of chiltern, have saturated yielding
Property, stiffening basic ground need to be carried out, consolidation process is usually realized by setting compaction pile.Compacting formation is being carried out using rammer compacter
When compaction pile, worker is only capable of by virtue of experience judging the thickness of filler and the number of compacting, and construction quality is unable to get guarantee, scene
Technical staff can not accurate control foundation stabilization effect.
Summary of the invention
The present invention provides a kind of cement-soil compaction pile earth filling tamping time control construction method, can better ensure that construction
Quality improves construction efficiency, enables the effect of the accurate control foundation stabilization of field technician.
The cement-soil compaction pile earth filling tamping time provided by the invention controls construction method, comprising the following steps: S1) it carries out
Construction site fill and lead up roll it is smooth；S2 it) using tunnel or roadbed middle line as main shaft, is determined by surveying and locating multiple to be onstructed
The center position of compaction pile；S3) compacted piling machine is aligned to the center position of one of them compaction pile to be onstructed, utilized
The compacted piling machine progress compaction pile drilling construction reaches projected depth up to hole depth, withdraws from the compacted piling machine；S4 it) adopts
Cement earthen backfill is carried out with hammer tamping machine to ram, wherein soil cement successively is backfilled into the compaction pile pore-forming according to predetermined thickness,
The soil cement backfilled to every layer is rammed the time and is rammed according to predetermined, until backfill is rammed and reaches smooth absolute altitude, to be formed
Cement-soil compaction pile, wherein the smooth absolute altitude is higher than the design stake top absolute altitude of cement-soil compaction pile；S5) soil cement is squeezed
The stake top of close stake dispels reduction to the design stake top absolute altitude, to complete the construction of the cement-soil compaction pile；S6 step) is repeated
S3) to S5), until completing the construction of whole cement-soil compaction piles.
Preferably, the step S2) in, the center position of multiple compaction piles to be onstructed is in quincunx or rectangular cloth
It sets.
Preferably, the stake diameter of the compaction pile is 40~60cm of φ, and the stake spacing of adjacent compaction pile is more than or equal to 1.0m.
Preferably, the compacted piling machine is diesel hammer lime-soil compaction piling machine.
Preferably, step S4) in, successively backfill soil cement is controlled by controlling the backfill time of successively backfill soil cement
Thickness.
Preferably, step S4) in, the smooth absolute altitude is higher than the design stake top absolute altitude 0.5m.
Preferably, the step S5) further include: the stake top of the cement-soil compaction pile is dispelled into reduction to the design stake
After top mark is high, the cement-soil compaction pile is detected, the detection includes the detection of stake diameter, the detection of pile body compacted density, stake
Between the compacted Density Detection of soil and Pile Composite Foundation loading test.
Preferably, the pile body compacted density detection includes: to carry out core boring sampling in the pile body position every 2m depth
For detecting；The compacted Density Detection of inter-pile soil includes: that position progress core boring sampling is used between the stake every 2m depth
Detection.
Preferably, the Pile Composite Foundation loading test is executed using plane-plate loading test method.
The cement-soil compaction pile earth filling tamping time provided by the invention controls construction method, passes through the mechanical intermittent work of control
Make, controls the thickness of every layer of backfill soil cement, and the time that the soil cement of every layer of backfill is rammed in control, can control to be formed
Cement-soil compaction pile density, preferably ensure that the quality of construction, improve construction efficiency, enable field technician
The effect of enough accurate control foundation stabilizations.
The other feature and advantage of the embodiment of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to further understand for providing to the embodiment of the present invention, and constitute part of specification, under
The specific embodiment in face is used to explain the present invention embodiment together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure:
Fig. 1 is the implementation step of the cement-soil compaction pile earth filling tamping time control construction method of embodiment according to the present invention
Rapid flow chart.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the embodiment of the present invention.It should be understood that this
Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
With reference to the accompanying drawing, technical solution in the embodiment of the present invention is described in detail.
As shown in Figure 1, the present invention provides a kind of cement-soil compaction pile earth filling tamping time control construction method, including following
Step: S1) carry out construction site fill and lead up roll it is smooth；S2 it) using tunnel or roadbed middle line as main shaft, is determined by surveying and locating
The center position of multiple compaction piles to be onstructed；S3) compacted piling machine is aligned in one of them compaction pile to be onstructed
Described squeeze is withdrawn from using the compacted piling machine progress compaction pile drilling construction until hole depth reaches projected depth in heart point position
Close piling machine；S4 it) carries out cement earthen backfill using hammer tamping machine to ram, wherein according to predetermined thickness successively to the compaction pile pore-forming
Interior backfill soil cement, the soil cement backfilled to every layer is rammed the time and is rammed according to predetermined, until backfill is rammed and reaches flat
Whole absolute altitude, to form cement-soil compaction pile, wherein the smooth absolute altitude is higher than the design stake top absolute altitude of cement-soil compaction pile；S5)
The stake top of the cement-soil compaction pile is dispelled into reduction to the design stake top absolute altitude, to complete applying for the cement-soil compaction pile
Work；S6 step S3) is repeated) to S5), until completing the construction of whole cement-soil compaction piles.
During tunnel or subgrade construction, since tunnel or roadbed base stratum are the new loess of chiltern, have saturated yielding
Property, stiffening basic ground need to be carried out, consolidation process is usually realized by setting compaction pile, is ceaselessly being rammed using rammer compacter
When in fact to form compaction pile, worker is only capable of by virtue of experience judging the thickness of filler and the number of compacting, and construction quality is unable to get
Ensure, field technician can not accurate control foundation stabilization effect.
According to the technique and scheme of the present invention, step S1 is first carried out) carry out construction site fill and lead up roll it is smooth, be subsequent rammer
Work is hit to be ready.
Later, step S2 is executed) using tunnel or roadbed middle line as main shaft, it is determined by surveying and locating multiple to be onstructed
The center position of compaction pile.
A kind of embodiment according to the present invention, step S2) in, the center position of multiple compaction piles to be onstructed is in plum
Flower-shape or square arrangement so that each compaction pile stress is relatively uniform, the compaction pile it is rationally distributed, and have it is good plus
Gu effect.
A kind of embodiment according to the present invention, the stake diameter of the compaction pile is 40~60cm of φ, described compacted to guarantee
Stake has enough bearing capacitys, and the stake spacing of adjacent compaction pile is more than or equal to 1.0m, is configured according to the actual situation, so that
Extruding density between each compaction pile stake is laid out effect within a preset range, to reach reasonable.
After the center position of multiple compaction piles to be onstructed to be determined, step S3) compacted piling machine is aligned wherein
The center position of one compaction pile to be onstructed, carry out compaction pile drilling construction using the compacted piling machine until hole as deep as
To projected depth, the compacted piling machine is withdrawn from.
A kind of embodiment according to the present invention, the compacted piling machine are diesel hammer lime-soil compaction piling machine, Ke Yixuan
With DD32 type diesel hammer lime-soil compaction piling machine, the high 21.5m of pile frame, pile pipe is made of Φ 400mm seamless steel pipe, indicates in pile pipe
Drilling depth label, can intuitively observe depth of pore forming, stop drilling construction when hole depth reaches projected depth, withdraw from described compacted
Piling machine.
After compaction pile pore-forming to be formed, step S4) it is rammed using hammer tamping machine progress cement earthen backfill, wherein according to predetermined
Thickness successively backfills soil cement into the compaction pile pore-forming, and the soil cement backfilled to every layer rams time progress according to predetermined
It rams, until backfill is rammed and reaches smooth absolute altitude, to form cement-soil compaction pile, wherein the smooth absolute altitude is squeezed higher than soil cement
The design stake top absolute altitude of close stake.
According to the technique and scheme of the present invention, in the operation of cement-soil compaction pile earth filling tamping, by mechanical service intermittent,
The thickness of every layer of backfill soil cement, and the time that the soil cement of every layer of backfill is rammed in control are controlled, formation can be controlled
The density of cement-soil compaction pile, preferably guarantees construction quality, improves construction efficiency, enables field technician's accurately handle
Control the effect of foundation stabilization.
A kind of embodiment according to the present invention, step S4) in, by control successively backfill soil cement the backfill time come
Control successively backfills the thickness of soil cement.There is the hopper for loading backfill soil cement, the hopper vibration in the hammer tamping machine
It is dynamic the backfill soil cement of predetermined volume once to be inserted in compaction pile pore-forming, when by controlling vibration that hopper once vibrates
It is long, it can control the volume of the backfill soil cement, in situation known to aperture, obtain the thickness of corresponding backfill soil cement
Degree is realized according to predetermined thickness so as to the vibration time once vibrated by controlling the hopper successively to described compacted
Soil cement is backfilled in stake pore-forming.
A kind of embodiment according to the present invention by experiment can obtain that the backfill soil cement is rammed to extruding extremely
Make a reservation for ram the time required for predetermined density, so as to realize that the soil cement for backfilling every layer rams the time according to predetermined
It is rammed, until backfill is rammed and reaches smooth absolute altitude, to form the cement-soil compaction pile for meeting design requirement.
According to site operation situation, the hammer ram diameter that can choose the hammer tamping machine is 40cm, and hammer ram weight is 245Kg, is rammed
Hammering is fallen away from for 0.7m hammer every time, so that backfill soil cement is along horizontal and vertical directions progress dense extrusion.According to above
Parameter can obtain ramming every layer of backfill soil cement extruding to the time is rammed required for predetermined density, backfill to every layer
Soil cement is rammed the time and is rammed according to predetermined, until backfill is rammed and reaches smooth absolute altitude.
A kind of embodiment according to the present invention, the hammer tamping machine are time control hammer tamping machine, including two time relays
Device, can control the vibration time that the hopper once vibrates respectively, and the control hammer tamping machine carry out that layering rams when
Between and ram dwell time (ram dwell time for hopper backfill soil cement).
A kind of embodiment according to the present invention, the clamping-bar type hammer tamping machine that can choose 320 type of model are rammed, often
Layer backfill soil cement with a thickness of 0.13m, ramming rear compacted thickness is 0.1m；For example, every layer is rammed according to practice of construction situation
No less than 6 times, used time time of ramming of the soil cement backfilled to every layer is no less than 6 seconds；It rams for every layer and stops being no less than after the completion
10 seconds, soil cement is backfilled for hopper, until backfill is rammed and reaches smooth absolute altitude.
Since the stake top of the cement-soil compaction pile of formation is not easy to be compacted, design requirement is often not achieved in density, according to this hair
The smooth absolute altitude of soil cement is set higher than the design stake top absolute altitude of cement-soil compaction pile, in order to the later period by bright technical solution
The stake top of cement-soil compaction pile is dispelled to design stake top absolute altitude, guarantee the cement-soil compaction pile meet design requirement height and
Density.
A kind of embodiment according to the present invention, it is preferable that step S4) in, the smooth absolute altitude is higher than the design stake
Top mark high 0.5m dispels arrangement convenient for later period compacted stake top while save the cost.
A kind of embodiment according to the present invention, backfill soil cement mixing be according to live dosage with mix with, it is excellent
Selection of land, the soil cement mixed overnight must not use, it is further preferred that the soil cement mixed makes again after must not exceed 6 hours
With, and must not be soaked with rain and impregnate, in order to avoid influence the quality of the cement-soil compaction pile.
According to the technique and scheme of the present invention, step S5) it the stake top of the cement-soil compaction pile is dispelled into reduction sets to described
Stake top absolute altitude is counted, to complete the construction of the cement-soil compaction pile.Since stake top compacted density is usually less than pile body, dispelled by stake top
It removes, can guarantee that the cement-soil compaction pile meets the height and density of design requirement, guarantee applying for the cement-soil compaction pile
Working medium amount.
A kind of embodiment according to the present invention, it is preferable that the step S5) further include: by the cement-soil compaction pile
Stake top dispel reduction to after the design stake top absolute altitude, the cement-soil compaction pile is detected, the detection includes stake
Diameter detection, the detection of pile body compacted density, the compacted Density Detection of inter-pile soil and Pile Composite Foundation loading test, to be formed with guaranteeing
The cement-soil compaction pile have and meet the stake diameter of design requirement, density and bearing capacity.
A kind of embodiment according to the present invention, it is preferable that the pile body compacted density detection includes: to exist every 2m depth
The pile body position carries out core boring sampling for detecting, to guarantee that each cement-soil compaction pile meets design requirement；Between the stake
The compacted Density Detection of soil includes: that position carries out core boring sampling for detecting, to guarantee a meta position between the stake every 2m depth
It sets and at all levels is all satisfied design bearing capacity requirement.
A kind of embodiment according to the present invention, the pile body compacted density detection and the compacted density inspection of the inter-pile soil
It surveys, respectively includes dry density detection and wet density detection, so that the pile body and inter-pile soil meet design requirement, guarantee construction
Safety.
A kind of embodiment according to the present invention, it is preferable that the Pile Composite Foundation loading test uses plate lotus
It carries test method to execute, the plane-plate loading test method are as follows: load design load pressure classification in soil cement to be detected
On compaction pile, the settling amount of ground is observed, the corresponding relationship of load pressure and settling amount is generated, judges whether that meeting bearing capacity wants
It asks.
According to the technique and scheme of the present invention, step S6) repeat step S3) to S5), until completing whole cement-soil compaction piles
Construction.
The object of the present invention is to provide a kind of cement-soil compaction pile earth filling tamping times to control construction method, will be multiple compacted
Stake is in quincunx or square arrangement, so that the compaction pile of construction section has good consolidation effect；It is mechanical intermittent by control
Work controls the thickness of every layer of backfill soil cement, and the time that the soil cement of every layer of backfill is rammed in control, can control shape
At cement-soil compaction pile density, preferably ensure that the quality of construction, improve construction efficiency, so that field technician
It is capable of the effect of accurate control foundation stabilization.
The optional embodiment of the embodiment of the present invention is described in detail in conjunction with attached drawing above, still, the embodiment of the present invention is simultaneously
The detail being not limited in above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention
The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection scope of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the embodiment of the present invention pair
No further explanation will be given for various combinations of possible ways.
In addition, any combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, equally should be considered as disclosure of that of the embodiment of the present invention.
Claims (9)
1. a kind of cement-soil compaction pile earth filling tamping time controls construction method, which is characterized in that the control construction method packet
Include following steps:
S1) carry out construction site fill and lead up roll it is smooth；
S2) using tunnel or roadbed middle line as main shaft, the center point of multiple compaction piles to be onstructed is determined by surveying and locating
It sets；
S3) compacted piling machine is aligned to the center position of one of them compaction pile to be onstructed, utilize the compacted piling machine
Progress compaction pile drilling construction reaches projected depth up to hole depth, withdraws from the compacted piling machine；
S4 it) carries out cement earthen backfill using hammer tamping machine to ram, wherein successively returning into the compaction pile pore-forming according to predetermined thickness
Soil cement is filled out, the soil cement backfilled to every layer is rammed the time and rammed according to predetermined, until backfill is rammed and reaches smooth mark
Height, to form cement-soil compaction pile, wherein the smooth absolute altitude is higher than the design stake top absolute altitude of cement-soil compaction pile；
S5) stake top of the cement-soil compaction pile is dispelled and is cut down to the design stake top absolute altitude, it is compacted to complete the soil cement
The construction of stake；
S6 step S3) is repeated) to S5), until completing the construction of whole cement-soil compaction piles.
2. construction method according to claim 1, which is characterized in that the step S2) in, multiple compaction piles to be onstructed
Center position be in quincunx or square arrangement.
3. construction method according to claim 2, which is characterized in that the stake diameter of the compaction pile is 40~60cm of φ, phase
The stake spacing of adjacent compaction pile is more than or equal to 1.0m.
4. construction method according to claim 1, which is characterized in that the compacted piling machine is that diesel hammer lime-soil compaction is beaten
Stake machine.
5. construction method according to claim 1, which is characterized in that step S4) in, by controlling successively backfill soil cement
The backfill time come control successively backfill soil cement thickness.
6. construction method according to claim 1, which is characterized in that step S4) in, the smooth absolute altitude is higher than described set
Count stake top absolute altitude 0.5m.
7. construction method according to claim 1, which is characterized in that the step S5) further include: the soil cement is squeezed
After the stake top of close stake dispels reduction to the design stake top absolute altitude, the cement-soil compaction pile is detected, the detection packet
Include a diameter detection, the detection of pile body compacted density, the compacted Density Detection of inter-pile soil and Pile Composite Foundation loading test.
8. construction method according to claim 7, which is characterized in that the pile body compacted density detection includes: every 2m
Depth carries out core boring sampling for detecting in the pile body position；The compacted Density Detection of inter-pile soil includes: every 2m depth
Position carries out core boring sampling for detecting between the stake.
9. construction method according to claim 7, which is characterized in that the Pile Composite Foundation loading test is using flat
Plate load test method executes.
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Application publication date: 20190531 |