CN107313420B - The construction method of strong rammer densification block pier is replaced using high pressure water - Google Patents
The construction method of strong rammer densification block pier is replaced using high pressure water Download PDFInfo
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- CN107313420B CN107313420B CN201710402724.2A CN201710402724A CN107313420B CN 107313420 B CN107313420 B CN 107313420B CN 201710402724 A CN201710402724 A CN 201710402724A CN 107313420 B CN107313420 B CN 107313420B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
- E02D3/054—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil involving penetration of the soil, e.g. vibroflotation
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Abstract
The invention discloses a kind of construction methods for replacing strong rammer densification block pier using high pressure water, for the ground for the mud that crouches under huge thick Backfilled Stone Layer, Backfilled Stone Layer is passed through to be inserted into mud using diversion pipe, utilize high-pressure water jet cutting, dilution mud, muddy water cavity is formed, as muddy water shoves upwards under high pressure effect, Backfilled Stone Layer slump into cavity above cavity, displacement block pier is formed, finally keeps Backfilled Stone Layer and block pier closely knit using strong rammer.The construction method that the present invention replaces strong rammer densification block pier using high pressure water solves the problems, such as to handle mud under huge thick Backfilled Stone Layer.It is a kind of not only economical but also simple and efficient, not only can guarantee the duration but also can guarantee the method for construction quality.
Description
Technical field
The present invention relates to the basement process for the mud that crouches under huge thick Backfilled Stone Layer, and in particular to be a kind of to utilize high pressure
Water replaces the construction method of strong rammer densification block pier.
Background technology
In filling out the backfill of the water field of big area such as sea and making ground engineering, in the prevalence of the huge thick Backfilled Stone Layer of overlying.Sleeping thickness is not down
The phenomenon that equal muds.Processing to sleeping mud under this is always the problem in design and construction, just it is known at present in the world
There are no methods that is a kind of not only economic but also simple and efficient, not only can guarantee the duration not only but also can guarantee construction quality.
Currently, the basement process for the mud that crouches under thickness Backfilled Stone Layer huge to overlying, generally use replace strong rammer and high-pressure rotary-spray
Two methods of stake, but both methods has limitation again.
1, dynamic replacement block pier is difficult to puncture if top Backfilled Stone Layer is too thick, hits not wear not becoming to replace and lead to
Road, replacing process can not just carry out.
2, high-pressure rotary-spray piling method processing mud is feasible, but to large-area construction, long in time limit and make us nothing because of cost height
Method is born.
It the methods of inserts drain bar, sanding stake in addition, also having, smash stone mar, without engineering economy meaning.
Invention content
The object of the present invention is to provide a kind of construction method for replacing strong rammer densification block pier using high pressure water, the method solutions
It has determined and has handled the problem of mud under huge thick Backfilled Stone Layer.It is a kind of not only economical but also simple and efficient, not only can guarantee the duration but also can protect
The method for demonstrate,proving construction quality.
The present invention can be achieved through the following technical solutions：For the ground for the mud that crouches under huge thick Backfilled Stone Layer, profit
It passes through Backfilled Stone Layer to be inserted into mud with diversion pipe, using high-pressure water gas injection rotary cutting, dilution mud, forms muddy water cavity,
As muddy water shoves upwards under high pressure effect, Backfilled Stone Layer forms displacement block pier to cavity slump above cavity.
As one of preferred embodiment of the present invention（From bottom to top）：The lower part of the diversion pipe is equipped with nozzle, and diversion pipe is inserted
Enter the lower part or bottom of mud；High-pressure hydraulic pump and air compressor are opened, the nozzle of diversion pipe lower part sprays high-pressure water gas
Jet stream cuts and dilutes mud, forms muddy water cavity；Diluted mud pulp-water is cut along top mud most weakness, that is, is become silted up
Gap between mud and diversion pipe is shoved upwards, is influxed mud layer surface and is gushed in the gap of Backfilled Stone Layer around and fills out, mud
Lower part or bottom formed several rice be full of high pressure water muddy water cavity；As diversion pipe is slowly promoted upwards, cavity is therewith
Constantly upwardly extend expansion, high pressure water constantly gets into cavity, and liquid in cavity is made to have very high pressure, to cavity surrounding and
The mud at top plays supporting role, and the mud at the top of cavity is made not deform and collapse with the expansion of cavity；Work as spray
When mouth is close to mud at the top of cavity and Backfilled Stone Layer bottom, Backfilled Stone Layer is because losing support due to the slump into cavity, the silt in cavity
Slime water shoves upwards from the block stone gap of whereabouts；Water vapor jet is closed, the pressure in cavity die-offs, and opens at the top of diversion pipe
Vibrator accelerates block stone falling speed, so that block stone is gradually filled up muddy water cavity and by pressure by cibration, to form several meters of block
The stone pier.
Improvement to said program：Stop water vapor jet, transfers to diversion pipe, shift to another construction point, several construction points are applied
Work finishes to form several areas after, the loose Backfilled Stone Layer of each pier point is carried out ramming by Backfilled Stone Layer surface flattening, then with dynamic compaction machinery, is rammed
It hits the big of energy and neglects loose rockfill layer thickness and the determination of block pier length.
Improvement to said program：Need to handle the ground of mud of crouching under huge thick Backfilled Stone Layer for large area, it can be with
Reasonable Arrangement diversion pipe places site, to the block in the lower sleeping mud of monoblock ground, having the formation of target a number of
The stone pier.
Further improvement of these options：In Backfilled Stone Layer earth's surface by eccentric impactor pilot hole, hole deep penetration Backfilled Stone Layer, steel
The long diversion pipe of several rice is inserted by cylinder-wall protecting by hole, until mud lower part or bottom, or the block according to design requirement
Stone pier bottom depth determines.
Two as preferred embodiment of the present invention（From top to bottom）：The lower part of the diversion pipe is equipped with nozzle, water conservancy diversion pipe end
Portion is inserted into several meters of the surface depths of mud；Open high-pressure hydraulic pump and air compressor, the high pressure of the nozzle ejection of diversion pipe
Water vapor jet cuts and dilutes mud, forms muddy water cavity；Diversion pipe slowly rotates and upgrades upwards, and mud cavity upwardly extends,
When nozzle is close to Backfilled Stone Layer bottom at the top of cavity, Backfilled Stone Layer due to losing support to intracavitary slump, the silt slurry in cavity
Water shoves upwards from the block stone gap of whereabouts；After completing one section of displacement operation, using the vibrator at the top of diversion pipe, make water conservancy diversion
For pipe again insertable into being completed in the mud of pars infrasegmentalis, insertion depth is 5 meters below replacing section pier body bottom, then starts water
Gas jet stream, slowly rotation is lifted up diversion pipe, and mud cavity upwardly extends, when the close block pier bottom that displacement is completed of nozzle
When portion, Backfilled Stone Layer to cavity slump, shoves upwards due to losing support in the block stone gap that the mud pulp-water in cavity is fallen from above；
Such above-mentioned steps are repeated several times, and block pier segmentation does not stop to extend downwardly, until the depth that complete design requires.
Improvement to said program：Stop water vapor jet, transfers to diversion pipe, shift to another construction point, several construction points are applied
Work finishes to form several areas after, Backfilled Stone Layer ground is bulldozed, then the loose Backfilled Stone Layer of each pier point is carried out ramming with dynamic compaction machinery, is rammed
It hits the big of energy and neglects loose rockfill layer thickness and the determination of block pier length.
Improvement to said program：It, can for the ground for the mud that crouches under large area huge thick Backfilled Stone Layer to be treated
Site is placed with reasonable Arrangement diversion pipe, in the lower sleeping mud of monoblock ground, there is the formation of target a number of
Block pier.
Diversion pipe described in above-mentioned two scheme is rotatable；Diversion pipe top tape vibrator, vibrator can assist diversion pipe
Into and out vibrator can accelerate block stone to sink.
The present invention is different from the side of existing processing mud using the construction method of high pressure water displacement strong rammer densification block pier
Method：Current art is generally the method by various Chemical Physics, and the purpose of consolidated subsoil is realized by improving mud intensity；
The present invention acts in a diametrically opposite way, and dilutes mud using high-pressure water gas, by reducing mud intensity, block stone is promoted to be handed over mud position
The method to form block pier is changed, to realize the purpose of consolidated subsoil.
The present invention has been filled up in the world using the construction method of high pressure water displacement strong rammer densification block pier to huge thick Backfilled Stone Layer
The blank of beneath sleeping not equal thickness sullage layer treatment, the method has the advantages that following notable：
1, work efficiency is high：By technique inference, the every 2 hours mud that can handle about 140 square metres of Backfilled Stone Layer bottoms.Work efficiency is higher
Pressure rotary-spraying stake about improves 3-5 times.
2, low cost：Unit price is about the 1/3-1/5 of high-pressure rotary jet grouting pile.
3, with strong points：The construction effect that the construction methods such as high-pressure rotary jet grouting pile and displacement strong rammer are difficult to realize under given conditions
Fruit, this method can all be realized.
Description of the drawings：
Attached drawing 1 is one schematic diagram of embodiment for the construction method that the present invention replaces strong rammer densification block pier using high pressure water；
Attached drawing 2 is two schematic diagram of embodiment for the construction method that the present invention replaces strong rammer densification block pier using high pressure water.
Specific implementation mode：
In order that those skilled in the art will better understand the technical solution of the present invention, with reference to embodiment and attached drawing
Product of the present invention is described in further detail.
In Fig. 1, for the first of the invention embodiment, it is to take processing procedure " from bottom to top " to mud,
In marine reclamation land engineering, the bed course 1 that rockfills is covered in the top of mud 2.It is divided into five processes of (a)-(e) in Fig. 1.
As shown in Fig. 1 (a), 1, in Backfilled Stone Layer earth's surface by eccentric impactor pilot hole, hole deep penetration Backfilled Stone Layer, steel pile casting shield
Wall；2, about 20 meters of long steel diversion pipes are inserted by hole, until the lower part or bottom of mud（The block pier column bottom of design requirement
Portion's depth）, as shown in Fig. 1 (a)；3, high-pressure hydraulic pump and air compressor are opened, the high-pressure water gas that the nozzle of diversion pipe sprays is penetrated
Stream cuts and dilutes mud, about 1.2-2.0 meters of radius of clean-up；4, it is most thin along top mud to be cut diluted mud pulp-water
Gap between weak place, i.e. mud and diversion pipe is shoved upwards, is influxed mud layer surface and is gushed in the gap of Backfilled Stone Layer around
It fills out, as shown in Figure 1 b；5, the high-pressure chamber that several rice are full of muddy water is formed at the lower part or bottom of mud, with diversion pipe
It is slowly promoted upwards, cavity constantly upwardly extends expansion therewith, as shown in Fig. 1 (c)；6, high-pressure water gas to be more than 500 per hour
The flow of cubic meter constantly gets into cavity, so that the liquid in cavity is had very high pressure, to the mud of cavity surrounding and top
Layer plays supporting role, so that the mud at the top of cavity is not deformed with the expansion of cavity and collapses, as shown in Fig. 1 (c)；7、
It repeats the above steps, diversion pipe is constantly lifted up；8, it when nozzle is close to mud at the top of cavity and Backfilled Stone Layer bottom, rockfills
Layer is to cavity slump due to losing support, and the mud pulp-water in cavity shoves upwards from the block stone gap of whereabouts, such as Fig. 1 (d)
It is shown；9, water vapor jet is closed, the pressure in cavity die-offs, and starts the vibrator on diversion pipe top, and upper mass stone is accelerated to fill up
Cavity, to form 2.4-4.0 meters of diameter, high several meters of block pier, as shown in Fig. 1 (e)；10, diversion pipe is transferred to shift to down
One construction point；11, the construction of several construction points finishes to form several areas after, Backfilled Stone Layer earth's surface is bulldozed, then with dynamic compaction machinery pair
The loose Backfilled Stone Layer of each pier point carries out a rammer；12, the big of heavy tamping energy neglects loose rockfill layer thickness and pier length determination.
It, can reasonable cloth for the ground for the mud that crouches under large area huge thick Backfilled Stone Layer to be treated in the present embodiment
It sets diversion pipe and places site, to the block pier in the lower sleeping mud of monoblock ground, having the formation of target a number of.
The long diversion pipe of several rice is inserted by hole in the present embodiment, until mud lower part or bottom, it can basis
The block pier bottom depth of design requirement determines.
In Fig. 2, for second of embodiment of the invention, it is to take processing procedure " from top to bottom " to mud,
In marine reclamation land engineering, block stone bed course 1 is covered in the top of mud 2.It is divided into (a)-(d) Four processes in Fig. 2.
1, in Backfilled Stone Layer earth's surface by eccentric impactor pilot hole, hole deep penetration Backfilled Stone Layer, steel pile casting retaining wall, such as Fig. 1 (a) institutes
Show；2, the long steel diversion pipe of several rice is inserted by hole, water conservancy diversion tube end is inserted into 5 meters of the surface depths of mud, such as Fig. 1 (a)
It is shown；3, high-pressure hydraulic pump and air compressor are opened, the high-pressure water gas jet current that the nozzle of diversion pipe sprays cuts and dilutes mud,
Form muddy water cavity；4, dilution mud pulp-water is cut to shove around and in the lamellar spacing of rockfilling on top, at the top of mud by
The mud cavity for gradually forming one several meters, as shown in Fig. 1 (b)；5, diversion pipe slowly rotates and upgrades upwards, and mud cavity is upward
Extend, as shown in Fig. 1 (b)；6, in the case where being more than the high-pressure water gas jet current impact of 500 cubic metres of flows per hour, when nozzle is close
When Backfilled Stone Layer bottom at the top of cavity, Backfilled Stone Layer is because losing support due to the slump into cavity, and mud pulp-water in cavity is from upper layer
Block stone gap in shove upwards, as shown in Fig. 1 (c)；7, after completing one section of displacement operation, the vibration at the top of diversion pipe is utilized
Device makes diversion pipe again insertable into being completed in the mud of pars infrasegmentalis, and insertion depth is 5 meters below replacing section pier body bottom,
Then start water vapor jet, slowly rotation is lifted up diversion pipe, and mud cavity upwardly extends, and displacement is completed when nozzle is close
Block pier bottom when, Backfilled Stone Layer due to losing support to cavity slump, the block stone gap of mud pulp-water in cavity from whereabouts
In shove upwards, as shown in Fig. 1 (d)；8, such above-mentioned steps are repeated several times, and block pier segmentation does not stop to extend downwardly, until full
Until the depth of sufficient design requirement；9, stop water vapor jet, transfer to diversion pipe, shift to another construction point；10, several construction points are applied
Work finishes to form several areas after, Backfilled Stone Layer earth's surface is bulldozed, then the loose Backfilled Stone Layer of each pier point is carried out ramming with dynamic compaction machinery；
11, the big of heavy tamping energy neglects loose layer thickness determination of rockfilling.It becomes silted up for crouching under large area huge thick Backfilled Stone Layer to be treated
The ground of mud layer can place site, the block pier for having the formation of target a number of with reasonable Arrangement diversion pipe.
Diversion pipe described in above-mentioned two embodiment is rotatable, and diversion pipe top tape vibrator, vibrator can assist to lead
Flow tube is into and out vibrator can accelerate block stone to sink.
Above-mentioned two embodiment can realize that the ground for the mud that crouches under huge thick Backfilled Stone Layer is effectively located
Reason.Vibrator, air compressor can be more effective, complete the radius of clean-up of bigger.
The construction method that the present invention replaces strong rammer densification block pier using high pressure water is divided into " from bottom to top " and " from upper
Under " two kinds of techniques realize.Which kind of technique is used in specific implementation, mud character, backfill layer stone depending on geologic information announcement
Expect particle, the conditions such as the depth and replacement rate that need reinforcement and determine.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the present invention in any form；It is all
The those of ordinary skill of the industry can be shown in by specification attached drawing and described above and swimmingly implement the present invention；But it is all
Those skilled in the art without departing from the scope of the present invention, using disclosed above technology contents
The equivalent variations for a little variation, modification and evolution made are the equivalent embodiment of the present invention；Meanwhile it is all according to the present invention
Substantial technological to the variation, modification and evolution etc. of any equivalent variations made by above example, still fall within the present invention's
Within the protection domain of technical solution.
Claims (9)
1. a kind of construction method for replacing strong rammer densification block pier using high pressure water, it is characterised in that：For huge thick Backfilled Stone Layer bottom
The ground of sleeping mud down passes through Backfilled Stone Layer to be inserted into mud using diversion pipe, is become silted up using high-pressure water jet injection cutting, dilution
Mud forms muddy water cavity, and as muddy water shoves upwards under high pressure effect, Backfilled Stone Layer slump into cavity above cavity is formed
Replace block pier；
The diversion pipe is connect with high-pressure hydraulic pump, and the lower part of diversion pipe is equipped with nozzle, diversion pipe be inserted into mud lower part or
Bottom；High-pressure hydraulic pump is opened, the high-pressure water jet that the nozzle of diversion pipe sprays cuts and dilute mud, forms muddy water cavity；Quilt
Diluted mud pulp-water is cut along top mud most weakness, i.e. gap between mud and diversion pipe is shoved, influxed upwards
Mud layer surface, which is gushed into the gap of Backfilled Stone Layer surrounding block stone, fills out, and the lower part or bottom of mud form several rice full of height
Press the cavity of muddy water；As diversion pipe slowly rotates and upgrades upwards, muddy water cavity constantly upwardly extends expansion therewith, and high pressure water is not
Disconnected to get into cavity, the liquid in cavity has higher pressure, and playing temporary support to the mud of cavity surrounding and top makees
With making it not deform and collapse with the expansion of muddy water cavity；When the lower part of diversion pipe is close to the Backfilled Stone Layer bottom at the top of cavity
When portion, to intracavitary slump due to losing support, the mud pulp-water in cavity shoves Backfilled Stone Layer upwards from the block stone gap of slump,
Solid starts to exchange with the position of liquid；High-pressure hydraulic pump is closed, the pressure in cavity die-offs, and starts vibrator at the top of diversion pipe and adds
Fast block stone sinks, and upper mass stone gradually fills up muddy water cavity, to form several meters of block pier, completes replacement process.
2. the construction method according to claim 1 for replacing strong rammer densification block pier using high pressure water, it is characterised in that：Institute
The diversion pipe stated also is connect with air compressor, and compressed-air atomizer is additionally provided at the lower nozzle of diversion pipe, and work space-time
Air compressor works together in company with high-pressure hydraulic pump, forms water vapor jet cutting dilution mud, makes the radius of cutting dilution mud more
Greatly.
3. the construction method according to claim 2 for replacing strong rammer densification block pier using high pressure water, it is characterised in that：Institute
The upper end for stating diversion pipe is equipped with vibrator, and the lower end of diversion pipe is equipped with guide pipe, vibrator can assist diversion pipe be inserted into and
It extracts, vibrator can accelerate block stone to sink.
4. the construction method according to any one of claim 1-3 that strong rammer densification block pier is replaced using high pressure water,
It is characterized in that：Transfer to diversion pipe shift to next construction point, several construction points finish to form several areas after, by Backfilled Stone Layer earth's surface
It being bulldozed, then a rammer is carried out to the loose Backfilled Stone Layer of each pier point with dynamic compaction machinery, the big of heavy tamping energy neglects loose layer thickness determination of rockfilling,
For the ground for the mud that crouches under large area huge thick Backfilled Stone Layer to be treated, site can be placed with reasonable Arrangement diversion pipe,
To the block pier in the lower sleeping mud of monoblock ground, having the formation of target a number of.
5. the construction method according to claim 4 for replacing strong rammer densification block pier using high pressure water, it is characterised in that：
Backfilled Stone Layer earth's surface is by eccentric impactor pilot hole, hole deep penetration Backfilled Stone Layer, steel pile casting retaining wall, by the long diversion pipe of several rice by hole
It is inserted into, until following about several meters depths or mud bottom at the top of mud.
6. a kind of construction method for replacing strong rammer densification block pier using high pressure water, it is characterised in that：For huge thick Backfilled Stone Layer bottom
The ground of sleeping mud down passes through Backfilled Stone Layer to be inserted into mud using diversion pipe, is become silted up using high-pressure water jet injection cutting, dilution
Mud forms muddy water cavity, and as muddy water shoves upwards under high pressure effect, Backfilled Stone Layer slump into cavity above cavity is formed
Replace block pier；
The lower part of the diversion pipe is equipped with nozzle, and water conservancy diversion tube end is inserted into several meters of the surface depths of mud；
High-pressure hydraulic pump is opened, the high-pressure water gas jet current that the nozzle of diversion pipe sprays cuts and dilute mud, forms muddy water cavity；
Diversion pipe slowly rotates and upgrades upwards, and mud cavity upwardly extends, when nozzle is close to Backfilled Stone Layer bottom at the top of cavity,
To intracavitary slump due to losing support, the mud pulp-water in cavity shoves Backfilled Stone Layer upwards from the block stone gap of whereabouts；
After the completion of completing one section of displacement, diversion pipe moves down several rice, then starts water vapor jet, slowly rotation carries diversion pipe upwards
It rises, mud cavity upwardly extends, and when nozzle is close to the block pier bottom that displacement is completed, Backfilled Stone Layer is due to losing support to chamber
Body slump, the mud pulp-water in cavity shove upwards from the block stone gap of whereabouts；
Such above-mentioned steps are repeated several times, and block pier segmentation does not stop to extend downwardly, until the depth that complete design requires.
7. the construction method according to claim 6 for replacing strong rammer densification block pier using high pressure water, it is characterised in that：Institute
The diversion pipe stated also is connect with air compressor, and compressed-air atomizer is additionally provided at the lower nozzle of diversion pipe, and work space-time
Air compressor works together in company with high-pressure hydraulic pump, forms water vapor jet cutting dilution mud, makes the radius of cutting dilution mud more
Greatly；The upper end of the diversion pipe is equipped with vibrator, and the lower end of diversion pipe is equipped with guide pipe, and vibrator can assist diversion pipe to insert
Enter and extract, vibrator can accelerate block stone to sink；After completing one section of replacement depth, is vibrated and squeezed using the vibrator at the top of diversion pipe
The close block stone fallen into cavity, while making the guide pipe of diversion pipe lower end again insertable into being completed in the mud of pars infrasegmentalis, it inserts
Enter depth for several rice below replacing section pier body bottom.
8. the construction method according to claim 7 for replacing strong rammer densification block pier using high pressure water, it is characterised in that：Stop
Only water vapor jet transfers to diversion pipe, shifts to another construction point, several construction points constructions finish to form several areas after, will rockfill
Layer earth's surface is bulldozed, then carries out a rammer to the loose Backfilled Stone Layer of each pier point with dynamic compaction machinery, and the big of heavy tamping energy neglects loose thickness of rockfilling
Degree and block pier depth determine；It, can be reasonable for the ground for the mud that crouches under large area huge thick Backfilled Stone Layer to be treated
Arrange that diversion pipe places site, to the block pier in the lower sleeping mud of monoblock ground, having the formation of target a number of.
9. the construction method that strong rammer densification block pier is replaced using high pressure water according to any one of claim 6-8,
It is characterized in that：In Backfilled Stone Layer earth's surface by eccentric impactor pilot hole, hole deep penetration Backfilled Stone Layer, steel pile casting retaining wall is long by several rice
Diversion pipe is inserted by hole.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN2016103858494 | 2016-06-03 | ||
| CN201610385849 | 2016-06-03 |
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| CN107313420B true CN107313420B (en) | 2018-08-31 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109440727B (en) * | 2018-10-24 | 2024-03-12 | 中国海洋大学 | Vibrating grouting equipment for reinforcing submarine soil foundation and treatment method |
| CN112081090A (en) * | 2020-06-12 | 2020-12-15 | 山西机械化建设集团有限公司 | Foundation treatment method for sludge layer under deep backfilled gravel soil by high-pressure water-gas replacement |
| CN112030931A (en) * | 2020-08-17 | 2020-12-04 | 中交天津港湾工程研究院有限公司 | Deep foundation soft soil interlayer replacement and reinforcement method |
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