CN206562933U - Soft soil layer shield grinds stake system - Google Patents
Soft soil layer shield grinds stake system Download PDFInfo
- Publication number
- CN206562933U CN206562933U CN201720128729.6U CN201720128729U CN206562933U CN 206562933 U CN206562933 U CN 206562933U CN 201720128729 U CN201720128729 U CN 201720128729U CN 206562933 U CN206562933 U CN 206562933U
- Authority
- CN
- China
- Prior art keywords
- soil layer
- soft soil
- layer shield
- shield machine
- wedge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
Stake system is ground the utility model discloses a kind of soft soil layer shield, soft soil layer shield machine is solved when shield is ground the concrete reinforcement of the existing buildings pile foundation on shield interval, the reinforcing bar segment that exists it is difficult and to the stabilizing influence of existing buildings it is larger the problem of.Steel bar concrete pile including soft soil layer shield machine and existing buildings, speed-variable pump is configured with the propulsion system of soft soil layer shield machine；Characterized in that, in the output gas circuit of the speed-variable pump of the propulsion system of soft soil layer shield machine, being in series with a gas circuit change-over switch valve, constant speed flow pump being connected with another input port of the gas circuit change-over switch valve；The cutterhead of soft soil layer shield machine is grinding on the steel bar concrete pile of existing buildings.The perturbation action for reducing ground pile foundation as far as possible is served, pile foundation ground is reduced and the possibility significantly settled occurs.
Description
Technical field
The present invention relates to the system that a kind of soft soil layer shield machine shield is ground existing buildings concrete pipe base, especially relate to
And one kind is in down town Tunnel Boring subway tunnel, the steel of existing buildings is ground come shield using soft soil layer shield machine
The system and mill piling method of reinforced concrete pile foundation.
Background technology
When urban central zone carries out subway shield tunnel construction, due to depositing for existing building pile foundation and existing underground utilities
Subway is set to plan that circuit needs the situation of shield crossing city existing pile foundation more and more.Because existing buildings carry
How the critical function in city, make shield-tunneling construction process, does not influence the normal of existing buildings to use, is faced as shield-tunneling construction
New problem.It is interval in subway tunnel shield, run into the situation for needing to be cut off to existing pile foundation sometimes, such situation,
General use removes former structures, and carries out ground pile pulling, or the mode of stake is dug after excavating shaft, and obstacle pile is torn open in advance
Remove, to ensure the normal construction of shield, but such construction method is present on surrounding enviroment influence greatly, and construction cost is high and long in time limit
Defect, particularly in urban central zone, limited by environmental objective factors, such construction method can not be implemented.
Soft soil layer shield machine is a kind of equipment that constructing tunnel is carried out in soft soil layer, is come with respect to compound shield
Say, low with equipment cost, cutter head structure is simple, safeguards easy advantage.During soft soil layer shield-tunneling construction, when running into
During armored concrete existing buildings pile foundation, how using soft soil layer shield machine, to block run into existing buildings
Concrete pipe base, is in the urgent need to address in constructing to ensure the stabilization of ground existing buildings, use safely and uninterruptedly
Problem.What is be equipped with due to the propulsion system of soft soil layer shield machine is speed-variable pump propulsion system, speed-variable pump be cutter head of shield machine to
The power source of preceding propulsion.Soft soil layer shield machine is in construction, during shield cut-out armored concrete existing buildings pile foundation,
The forward thrust of cutter head of shield machine depends primarily on speed-variable pump, unstable due to speed-variable pump output gas flow, cause cutterhead to
The preceding speed for promoting mill stake is also unstable, the mill stake operation of shield machine driver scene is not easy control.In addition, existing weak soil
The cutterhead of layer shield machine, the configuration of ability, particularly central cutter without cutting armored concrete, it is impossible to competent Cutting Steel
The task of muscle, its cutterhead is fixed a cutting tool the arrangement of track, and the concrete reinforcement that can not also cut ground stake be cut into segment, often hair
Raw cutterhead is wound the phenomenon of clamping stagnation by reinforcing bar is ground.
The content of the invention
The invention provides a kind of soft soil layer shield mill stake system and its mill piling method, soft soil layer shield machine is solved
When shield is ground the armored concrete of the existing buildings pile foundation on shield interval, the reinforcing bar segment existed is difficult and to existing
The larger technical problem of the stabilizing influence of structures.
The present invention is to solve above technical problem by the following technical programs：
A kind of soft soil layer shield grinds stake system, includes the reinforced concrete pile of soft soil layer shield machine and existing buildings
Base, speed-variable pump is configured with the propulsion system of soft soil layer shield machine；Characterized in that, in the propulsion of soft soil layer shield machine
In the output gas circuit of the speed-variable pump of system, a gas circuit change-over switch valve is in series with, in the another defeated of the gas circuit change-over switch valve
Constant speed flow pump is connected with entrance；The cutterhead of soft soil layer shield machine is steel bar concrete pile of the grinding in existing buildings
On.
In-line is provided with six shell knives, adjacent two on the center tool rest of the cutterhead of soft soil layer shield machine
Be 10 centimetres the spacing of shell knife, six every height shell knife in shell knife be from cutter head center to cutterhead edge according to
Secondary reduction, the height of the shell knife nearest apart from cutterhead edge is higher by 20 centimetres of cutter head panel；In soft soil layer shield
On the cutterhead plane domain of machine, knife spacing is 100 millimeters；On the cutterhead side circular arc sector of soft soil layer shield machine, knife spacing
For 50 millimeters.
Wedge-shaped dual-pilot cutter is provided with cutterhead spoke；On the cutterhead of soft soil layer shield machine, cutter path radius is small
In on 1985 millimeters of region, being provided with each cutter path line in two wedge-shaped dual-pilot cutters, this two wedge-shaped dual-pilot cutters
The height of one wedge-shaped dual-pilot cutter is 200 millimeters, and another height wedge-shaped dual-pilot cutter in this two wedge-shaped dual-pilot cutters is 170
Millimeter；On the cutterhead of soft soil layer shield machine, it is more than in cutter path radius on 1985 millimeters of region, each cutter path
Four wedge-shaped dual-pilot cutters are provided with line, this is wantonly 200 millimeters the height of wedge-shaped dual-pilot cutter one in wedge-shaped dual-pilot cutter, this
It it is wantonly 170 millimeters the height of wedge-shaped dual-pilot cutter another three in wedge-shaped dual-pilot cutter.
Wedge-shaped dual-pilot cutter is welded type, and arc hard alloy blocks are provided at both ends with the wedge-shaped dual-pilot cutter of welded type,
The centre of the wedge-shaped dual-pilot cutter of welded type is provided with hard alloy bar；It is additionally provided with and scrapes on the cutterhead of soft soil layer shield machine
Knife, the height of scraper is 140 millimeters.
A kind of soft soil layer shield grinds piling method, it is characterised in that when the cutterhead distance of soft soil layer shield machine is precut
Existing buildings 50 centimetres of steel bar concrete pile when, start speed-variable pump in the propulsion system of soft soil layer shield machine
The gas circuit change-over switch valve connected on air delivering pipeline, the hydraulic speed-changing pump of Thrust System of Shield Tunneling Machines is replaced with constant speed flow pump, this
When shield machine thrust provided by constant speed flow pump；The fltting speed for controlling cutterhead is 1-2 millimeters per minute, makes soft soil layer shield
Machine pushes ahead the steel bar concrete pile of grinding existing buildings under constant speed, until by the reinforcing bar of existing buildings
Untill concrete pipe base is cut off.
It is when shield machine fltting speed is constant, just small to the pile foundation disturbance that is ground, it is to avoid shield drilling depth is too fast, causes knife
Disk is stuck.Up to 10 centimetres lower of reinforcing bar is cut simultaneously, it is to avoid reinforcing bar is wrapped on cutterhead, and then the influence later stage normally digs
Enter, Tu Cang and screw machine, which are slagged tap, will not also produce catching phenomenon.
The present invention mainly replaces the hydraulic speed-changing pump of Thrust System of Shield Tunneling Machines by constant speed flow pump, to realize shield machine
Grinding to the constant low speed of existing buildings pile foundation, instead of the mode for manually controlling shield machine radial grinding, reaches
The purpose of stable grinding pile foundation, is blocked to existing pile foundation, and downward drag force will not be produced by making to be rubbed reinforcing bar, be played
The perturbation action of ground pile foundation is reduced as far as possible, reduces pile foundation ground and the possibility significantly settled occurs.In shield once
Property driving in, without changing cutter.
Brief description of the drawings
Fig. 1 is the structural representation of the soft soil layer cutter head of shield machine of the present invention；
Fig. 2 be the present invention set on the center tool rest 5 of cutter head of shield machine six shell knife 1 in overlook direction
Structural representation；
Fig. 3 be the present invention set on the center tool rest 5 of cutter head of shield machine six shell knife 1 in side-looking direction
Structural representation；
Fig. 4 is the structural representation of the shell knife of the present invention.
Embodiment
The present invention is described in detail below in conjunction with the accompanying drawings：
In soft soil layer shield-tunneling construction under the riverbed of down town inland river, the bridge of a heavy traffic is provided with inland river
Beam, the part pile foundation of the bridge is arranged on shield interval, how in the case where ensureing bridge normal pass, is completed on shield interval
The problem of shield excision of Partial Bridges pile foundation is in the urgent need to address in constructing.Because the cutterhead of soft soil layer shield machine is in mill
When cutting steel bar concrete pile, when cutterhead and bridge pier reinforcing bar are ground, the cutterhead power that is hampered can change, and the change of this resistance
The speed-variable pump of propulsion system outfit can be delivered to by cutter-devices system by changing, and speed-variable pump is by changing gas output, to export more
Big grinding force, whole process finally shows the jumping characteristic cutting bridge pier pile foundation reinforcing bar of shield cutter, to bridge pier pile foundation reinforcing bar
Downward drag force can be produced, cause pontic at the top of bridge pier by fluctuation, and the body of a bridge rocks cracking.A kind of soft soil layer shield
Stake system is ground, includes the steel bar concrete pile of soft soil layer shield machine and existing buildings, in pushing away for soft soil layer shield machine
Enter and speed-variable pump is configured with system；In the output gas circuit of the speed-variable pump of the propulsion system of soft soil layer shield machine, one is in series with
Individual gas circuit change-over switch valve, constant speed flow pump is connected with another input port of the gas circuit change-over switch valve；Soft soil layer shield
The cutterhead of structure machine is grinding on the steel bar concrete pile of existing buildings.When the cutterhead of soft soil layer shield machine is ground to
Before the existing bridge pile foundation cut off the need for shield interval is upper during 20 centimeters, by the liquid in soft soil layer Thrust System of Shield Tunneling Machines
Pressure and speed pump is turned off, and is replaced with constant speed flow pump, then controls cutterhead at the uniform velocity to push ahead cutting bridge pile foundation；Although cutterhead is met
Resistance can change after to reinforcing bar, but because the air-flow that constant speed flow pump is exported is constant, so can guarantee that cutterhead is basic
Pile foundation reinforcing bar is at the uniform velocity cut, when making cutterhead cutting bridge pier reinforcing bar, the drag force of fluctuation will not be produced, it is ensured that the base of the body of a bridge
This stabilization.
In-line is provided with six shell knives 1 on the center tool rest 5 of the cutterhead of soft soil layer shield machine, it is adjacent
The spacing of two shell knives is 10 centimetres, and six be from cutter head center to cutterhead side every height shell knife in shell knife 1
What edge was reduced successively, the height of the shell knife nearest apart from cutterhead edge is higher by 20 centimetres of cutter head panel；To strengthen weak soil
Cutting power of the cutter head of shield machine to reinforcing bar；On the cutterhead plane domain of soft soil layer shield machine, knife spacing is 100 millimeters；
On the cutterhead side circular arc sector of soft soil layer shield machine, knife spacing is 50 millimeters；Make shield cut under bridge pier reinforcing bar into
For segment, to prevent from winding on cutterhead, and be conducive to the conveying deslagging of conveying worm.
Wedge-shaped dual-pilot cutter 2 is provided with cutterhead spoke 3；On the cutterhead of soft soil layer shield machine, cutter path radius
On region less than 1985 millimeters, two wedge-shaped dual-pilot cutters 2, this two wedge-shaped dual-pilot cutters 2 are provided with each cutter path line
In one the height of wedge-shaped dual-pilot cutter be 200 millimeters, another height wedge-shaped dual-pilot cutter in this two wedge-shaped dual-pilot cutters 2
For 170 millimeters；On the cutterhead of soft soil layer shield machine, it is more than in cutter path radius on 1985 millimeters of region, each knife
Four wedge-shaped dual-pilot cutters 2 are provided with tool trajectory, this is wantonly the height of wedge-shaped dual-pilot cutter one in wedge-shaped dual-pilot cutter 2
200 millimeters, this is wantonly 170 millimeters the height of wedge-shaped dual-pilot cutter another three in wedge-shaped dual-pilot cutter.
Wedge-shaped dual-pilot cutter 2 is welded type, and arc hard alloy blocks are provided at both ends with the wedge-shaped dual-pilot cutter 2 of welded type
6, the centre of the wedge-shaped dual-pilot cutter 2 of welded type is provided with hard alloy bar 7, to strengthen the cutting to reinforcing bar；In soft soil layer
Scraper 4 is additionally provided with the cutterhead of shield machine, the height of scraper is 140 millimeters.
A kind of soft soil layer shield grinds piling method, when the precut existing buildings of the cutterhead distance of soft soil layer shield machine
50 centimetres of steel bar concrete pile when, start and gone here and there on the air delivering pipeline of the speed-variable pump in the propulsion system of soft soil layer shield machine
The gas circuit change-over switch valve of connection, the hydraulic speed-changing pump of Thrust System of Shield Tunneling Machines is replaced with constant speed flow pump, now shield machine thrust
There is provided by constant speed flow pump；The fltting speed for controlling cutterhead is 1-2 millimeters per minute, makes soft soil layer shield machine in constant speed
Under, the steel bar concrete pile of grinding existing buildings is pushed ahead, until the steel bar concrete pile of existing buildings is cut
Untill disconnected.
Claims (4)
1. a kind of soft soil layer shield grinds stake system, include the reinforced concrete pile of soft soil layer shield machine and existing buildings
Base, speed-variable pump is configured with the propulsion system of soft soil layer shield machine；Characterized in that, in the propulsion of soft soil layer shield machine
In the output gas circuit of the speed-variable pump of system, a gas circuit change-over switch valve is in series with, in the another defeated of the gas circuit change-over switch valve
Constant speed flow pump is connected with entrance；The cutterhead of soft soil layer shield machine is steel bar concrete pile of the grinding in existing buildings
On.
2. a kind of soft soil layer shield mill stake system according to claim 1, it is characterised in that in soft soil layer shield machine
Cutterhead center tool rest（5）It is upper that in-line is provided with six shell knives（1）, the spacing of two adjacent shell knives is 10
Centimetre, six shell knife（1）In every height shell knife reduced successively from cutter head center to cutterhead edge, apart from knife
The height of the nearest shell knife of plate edge is higher by 20 centimetres of cutter head panel；In the cutterhead plane domain of soft soil layer shield machine
On, knife spacing is 100 millimeters；On the cutterhead side circular arc sector of soft soil layer shield machine, knife spacing is 50 millimeters.
3. a kind of soft soil layer shield mill stake system according to claim 2, it is characterised in that in cutterhead spoke（3）On
It is provided with wedge-shaped dual-pilot cutter（2）；On the cutterhead of soft soil layer shield machine, cutter path radius is less than 1985 millimeters of region
On, two wedge-shaped dual-pilot cutters are provided with each cutter path line（2）, this two wedge-shaped dual-pilot cutters（2）In one wedge shape first
The height of row knife is 200 millimeters, this two wedge-shaped dual-pilot cutters（2）In another height wedge-shaped dual-pilot cutter be 170 millimeters；
On the cutterhead of soft soil layer shield machine, it is more than in cutter path radius on 1985 millimeters of region, is set on each cutter path line
It is equipped with four wedge-shaped dual-pilot cutters（2）, this four wedge-shaped dual-pilot cutters（2）In one the height of wedge-shaped dual-pilot cutter be 200 millimeters, this
It it is wantonly 170 millimeters the height of wedge-shaped dual-pilot cutter another three in wedge-shaped dual-pilot cutter.
4. a kind of soft soil layer shield mill stake system according to claim 3, it is characterised in that wedge-shaped dual-pilot cutter（2）It is
Welded type, in the wedge-shaped dual-pilot cutter of welded type（2）Be provided at both ends with arc hard alloy blocks（6）, in the wedge shape of welded type
Dual-pilot cutter（2）Centre be provided with hard alloy bar（7）；Scraper is additionally provided with the cutterhead of soft soil layer shield machine（4）, scrape
The height of knife is 140 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720128729.6U CN206562933U (en) | 2017-02-13 | 2017-02-13 | Soft soil layer shield grinds stake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720128729.6U CN206562933U (en) | 2017-02-13 | 2017-02-13 | Soft soil layer shield grinds stake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206562933U true CN206562933U (en) | 2017-10-17 |
Family
ID=60031209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720128729.6U Active CN206562933U (en) | 2017-02-13 | 2017-02-13 | Soft soil layer shield grinds stake system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206562933U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640105A (en) * | 2017-02-13 | 2017-05-10 | 中铁十九局集团轨道交通工程有限公司 | Soft land layer shield pile grinding system and pile grinding method |
| CN112983446A (en) * | 2021-04-22 | 2021-06-18 | 中铁一局集团第二工程有限公司 | Construction method for shield cutting of existing station reinforced concrete fender post |
-
2017
- 2017-02-13 CN CN201720128729.6U patent/CN206562933U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640105A (en) * | 2017-02-13 | 2017-05-10 | 中铁十九局集团轨道交通工程有限公司 | Soft land layer shield pile grinding system and pile grinding method |
| CN112983446A (en) * | 2021-04-22 | 2021-06-18 | 中铁一局集团第二工程有限公司 | Construction method for shield cutting of existing station reinforced concrete fender post |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101936167B (en) | Construction method for crossing bridge pile foundation by combining bridge underpinning with shield construction | |
| CN102733816B (en) | Deformation control method when shield traverse building within short distance | |
| CN106284187B (en) | The quick method for dismounting of Face Slab of Concrete of Rock-fill Dam destruction area | |
| CN206487480U (en) | A kind of big shape of a hoof slurry balance shield machine host | |
| CN106640105A (en) | Soft land layer shield pile grinding system and pile grinding method | |
| CN103397891A (en) | Cutting blade disc of muddy water balance push bench | |
| CN206562933U (en) | Soft soil layer shield grinds stake system | |
| CN104747202A (en) | Multi-cutter head combined type cutting system for rectangular pipe pushing machine | |
| CN108301842A (en) | A kind of fixing device and construction method for controlling duct pieces of shield tunnel floating | |
| CN209686488U (en) | Head is dug in milling for excavating side slope groove | |
| CN109139028B (en) | Arc-cutting shield tunneling machine cutterhead | |
| CN105065011A (en) | Construction method of soft soil shield tunneling cutting pile foundation | |
| Bäppler | New developments in TBM tunnelling for changing grounds | |
| CN108005670A (en) | A kind of shield cuts armored concrete clump of piles system | |
| CN207934896U (en) | A kind of fixing device for controlling duct pieces of shield tunnel floating | |
| CN212689974U (en) | Broken blade disc and entry driving machine of digging | |
| CN108755719A (en) | Seabed municipal tunnel over strait cofferdam open cutting construction method | |
| CN102943676A (en) | Concrete cutting advanced cutter for shield tunneling machine | |
| CN112523767A (en) | Construction method for shield pile grinding of expansion soil layer | |
| CN102852527A (en) | Cutter disc and cutter improving method for accelerating shield excavation in dense sand layer | |
| CN202228785U (en) | Jack type pipe-jacking head for long transmission pipeline | |
| CN202810846U (en) | Excavating equipment | |
| CN209724346U (en) | Mini-sized tunnelling machine | |
| CN202467850U (en) | Earth pressure balanced shield for large-grain diameter sandy cobble stratum | |
| CN103277109A (en) | Shield excavation construction method used for big-stickiness soil layer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |