CN107034874A - Double-screw type slip casting type freezing plant and construction method - Google Patents
Double-screw type slip casting type freezing plant and construction method Download PDFInfo
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- CN107034874A CN107034874A CN201710129361.XA CN201710129361A CN107034874A CN 107034874 A CN107034874 A CN 107034874A CN 201710129361 A CN201710129361 A CN 201710129361A CN 107034874 A CN107034874 A CN 107034874A
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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
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
- E02D3/115—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means by freezing
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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
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention provides a kind of double-screw type slip casting type freezing plant and construction method, including double-screw type slip casting type freezing pipe, the double-screw type slip casting type freezing pipe includes salt solution feed pipe and the outer tube being enclosed on outside the salt solution feed pipe, two helical ducts are provided between the tube wall of the salt solution feed pipe and the tube wall of the outer tube, two helical ducts share tube wall with the salt solution feed pipe and the outer tube, wherein it is slip casting helical pipe that a helical duct, which is salt solution helical pipe, another helical duct,.Double-screw type slip casting type freezing plant and construction method that the present invention is provided, realize the combination of grouting for water blocking, strengthening stratum technology and manual pipe jacking special construction technique, and the subterranean pipe line of two kinds of construction technologies is arranged in same pipeline, not only simplify construction method but also save drilling and pipeline cost.
Description
Technical field
The present invention relates to artificial stratum freezing engineering field, particularly a kind of double-screw type slip casting type freezing plant and construction
Method.
Background technology
Freeze-wellboring is before underground engineering construction, to beat a number of around the underground space to be excavated first
Frigo is installed, hypothermic saline flows in frigo, the heat of its surrounding formation is absorbed, loose, aqueous in freezing hole, hole
Formed in caving ground and freeze cylinder, freeze cylinder gradually expand and connect into closing, meet design thickness and intensity
Cylinder-dog collar, to resist native, water pressure, completely cuts off underground water, so that safety passes through aquifer water-bearing stratum, is that one kind is made by artificial
The special construction method of the cold temporary transient strengthening stratum of means and cut-off underground water.
Early in earlier 1800s, Russian begins to utilize weather freezing layer cutting vertical gold mining in Siberia.1862
Year, Britain reinforced foundation ditch first with artificial freezing technology.German engineer Bo Cishu in 1883 is used in Alba Reed Coal Exploitation
Freezing process digs depth 103m pit shaft, and obtains the patent of freeze-wellboring.From this, this technology is widely used in many states
In the engineering construction of family.The U.S. often carries out the reinforcing on basis using freezing process；The former Soviet Union once repeatedly made in subway tunnel construction
Stratum consolidation measure is used as with freezing technology；Freezing process is applied in the strengthening construction of bridges and culverts and Tunnel Engineering by the Western European countries；
Osaka, Japan Department of Communications freezes soil body volume up to 70m in No. five line engineering constructions of city's subway using freezing process3, to ensure
Shield is smoothly appeared.China to nineteen fifty-five with the help of Polish expert using freezing process establish out Luan First Weighting On Linxi Coal Mine ventilating shaft with
Come, freeze-wellboring obtains extensive popularization and application in China.
While engineering with artificial freezing method strengthening stratum is widely used in caving ground pit shaft construction project, in other Geotechnical Engineerings
Promoted rapidly in the particularly city underground engineering of field.Abroad, construction freezing method technology turn into it is a kind of feasible and
The weak soil of great competitiveness, unstable aquifer water-bearing stratum are reinforced, the effective ways of closure water.Germany is in Eisbach river bed within 1991
In the cave-in accident occurred during three Parallel Tunnel constructions, liquid nitrogen freezing method has been used to carry out soil layer reinforcing to collapsing position,
Receive good effect；Frozen soil is carried out in subway expansion works near the railway station of German Dusseldorf downtowns within 1994
Laboratory test, it is found that its intensity and anti-deformation could meet requirement when the saturation degree of soil reaches more than 60%.And now
With the development of China's Geotechnical Engineering, deep foundation and other underground municipal works are continued to bring out, and freezing process building enclosure is with it
Unique superiority and be increasingly taken seriously, ground freezing technique enters China's city underground engineering field comprehensively.
,, can band with the flowing of underground water if required frozen ground has Groundwater Flow in artificial Freezing stratum as rapid
The cold of a large amount of freezing pipes is walked, so that the cylinder that freezes for causing current top freezing pipe to be formed is difficult and current lower section freezing pipe
The cylinder that freezes formed hands over circle, and the cycle of whole frost wall greatly lengthens.Simultaneously because the flowing of underground water causes to freeze
First freeze below wall formation existence position difference, current, current freeze behind top, and frost wall partly belongs to relatively thin above current
The stress of frost wall during weak position, influence freeze-wellboring.Often through increasing freezing pipe caliber, increasing in engineering
Freeze the method for hypothermic saline usage amount and reduction hypothermic saline temperature to handle relevant issues, significantly increase energy consumption.For
There is provided a kind of new freezing pipe for freezing the stratum containing Groundwater Flow and construction work for the call of response modern society energy-saving and emission-reduction
Skill is particularly important.
The content of the invention
It is an object of the invention to provide a kind of double-screw type slip casting type freezing plant and construction method, it can overcome existing
The current flowing when freezing stratum containing Groundwater Flow of freezing pipe and construction freezing method technique causes substantial amounts of loss of refrigeration capacity, freezed
Wall is extremely difficult hand over circle, duration of freezing is longer, can not ensure frost wall uniformly freezes, after freeze thawing outer shaft wall by water pressure is excessive and nothing
Method is by slip casting the problems such as frozen construction is combined.
To achieve these goals, the present invention provides following technical scheme：
A kind of double-screw type slip casting type freezing plant, including double-screw type slip casting type freezing pipe, the double-screw type slip casting
Type freezing pipe includes salt solution feed pipe and the outer tube that is enclosed on outside the salt solution feed pipe, the salt solution feed pipe tube wall and
Be provided with two helical ducts between the tube wall of the outer tube, two helical ducts with the salt solution feed pipe and described
Outer tube shares tube wall, wherein it is slip casting spiral that a helical duct, which is salt solution helical pipe, another helical duct,
Pipeline；Two holes are provided with the upper end tube wall of the outer tube, two holes respectively as salt solution outlet end and slurries feed flow end,
Multiple slurries slurry outlets are provided with the outer tube；The slurries feed flow end is connected with one end of connecting tube, the connecting tube and set
It is equipped with into slurry ball valve, the other end of the connecting tube is connected with three-way pipe end, enters to starch ball valve and described three described
Grouting pressure table is provided with connecting tube between siphunculus, second end of the three-way pipe is provided with venting ball valve, described
3rd end of three-way pipe, which is connected with grouting pump, the grouting pump, is provided with pressure gauge, the grouting pump and air compressor machine phase
Even.
Further, in above-mentioned double-screw type slip casting type freezing plant, the upper end of the slip casting helical pipe is provided with
Upper end helical baffle, the lower end of the slip casting helical pipe is provided with lower end helical baffle.
Further, it is the salt solution feed pipe, the outer tube, described in above-mentioned double-screw type slip casting type freezing plant
Freeze salt solution helical pipe and the slip casting helical pipe to be made of low temperature mild steel；
Preferably, the slurries feed flow end is welded to connect with the connecting tube.
Further, in above-mentioned double-screw type slip casting type freezing plant, multiple slurries slurry outlets are in the outer tube
On in the shape of a spiral distribution and it is corresponding with the position of the slip casting helical pipe.
Further, in above-mentioned double-screw type slip casting type freezing plant, multiple grouting pressures are installed on the outer tube
Sensor；Preferably, multiple grouting pressure sensors on the outer tube in the shape of a spiral distribution and with the slip casting spiral
The position correspondence of pipeline, the grouting pressure sensor is distributed with the slurries slurry outlet batch (-type).
Further, in above-mentioned double-screw type slip casting type freezing plant, multiple solidification points are installed on the outer tube
Sensor, multiple solidification point sensors on the outer tube in the shape of a spiral distribution and with the position of the salt solution helical pipe
Put correspondence.
On the other hand there is provided a kind of construction method of double-screw type slip casting type freezing plant, comprise the following steps：
(1) vertical freezing hole, and the installation double-screw type slip casting type freezing pipe in the freezing hole are bored in the soil body；
(2) grouting equipment is used, inject injecting paste material by slip casting helical pipe carries out freezing preceding pre-pouring grout to the soil body；
(3) freezing system is used, refrigerant is injected by salt solution helical duct the soil body is freezed.
Further, in the above-mentioned methods, methods described is additionally included in step (1) using the inspection of theodolite Inclination Measurement by Light method
The depth of the perpendicularity, then repetition measurement freezing hole of double-screw type slip casting type freezing pipe is surveyed, and carries out salt solution helical duct and suppresses examination
The step of leakage；
Preferably, in step (2), after grouting equipment and corollary equipment are all connected, slip casting helical pipe is checked
It is whether normal, grouting pump is connected into slurries and pneumatic air compressor machine after inspection is errorless, venting ball valve is opened, closes into slurry ball valve, treat
When having slurries outflow in venting ball valve, slurries situation is observed, venting ball valve is closed, opens into slurry ball valve, utilize slip casting helix tube
Road carries out freezing preceding pre-pouring grout to the soil body；
Preferably, methods described, which is additionally included in install between step (2) and step (3), freezes station equipment, is debugged, tried
The step of operating, and leak test suppressed to the progress of salt solution helical duct is secondary.
On the other hand there is provided the construction method of another double-screw type slip casting type freezing plant, comprise the following steps：
(1) vertical freezing hole, and the installation double-screw type slip casting type freezing pipe in the freezing hole are bored in the soil body；
(2) freezing system is used, refrigerant is injected by salt solution helical duct the soil body is freezed；
(3) grouting equipment is used, inject injecting paste material by slip casting helical pipe carries out freezing grouting behind shaft or drift lining to the soil body.
Further, in the above-mentioned methods, methods described is additionally included in step (1) using the inspection of theodolite Inclination Measurement by Light method
The depth of the perpendicularity, then repetition measurement freezing hole of double-screw type slip casting type freezing pipe is surveyed, and carries out salt solution helical duct and suppresses examination
The step of leakage；
Preferably, methods described, which is additionally included in install between step (1) and step (2), freezes station equipment, is debugged, tried
The step of operating；
Preferably, in step (3), after grouting equipment and corollary equipment are all connected, slip casting helical pipe is checked
It is whether normal, grouting pump is connected into slurries and pneumatic air compressor machine after inspection is errorless, venting ball valve is opened, closes into slurry ball valve, treat
When having slurries outflow in venting ball valve, slurries situation is observed, venting ball valve is closed, opens into slurry ball valve, utilize slip casting helix tube
Road carries out freezing grouting behind shaft or drift lining to the soil body.
Analysis understands that double-screw type slip casting type freezing plant disclosed by the invention and construction method realize following technology
Effect：
(1) double-screw type slip casting type freezing pipe is formed by salt solution feed pipe is nested with outer tube, salt solution feed pipe and outer tube it
Between provided with two helical channels, respectively as the passage for freezing brine recycling and stratum slip casting.Realize grouting for water blocking, add
Gu the combination of stratum technology and manual pipe jacking special construction technique, and the subterranean pipe line of two kinds of construction technologies is arranged on same
In pipeline, construction method was not only simplified but also had saved drilling and pipeline cost.
(2) pressure gauge is mounted on the three-way pipe and grouting pump at slurries feed flow end, by observing note during slip casting
The change of pressure is starched, the progress of slip casting can be reasonably controlled, grouting pressure can be avoided excessive and double-screw type slip casting is damaged by pressure
Type freezing pipe, can be avoided because pressure of freezing wall is not enough and causes the problem of slip casting is insufficient again.
(3) choose a kind of in the two kinds of different construction methods that can be provided in the present invention by geological prospecting, according to
Pre-pouring grout or freeze grouting behind shaft or drift lining before actual conditions selection is freezed and be capable of the flowing of effective control freezing stratum water, and examine in real time
The pressure of slip casting and the temperature of freezing process are surveyed, is conducive to rationally controlling slip casting and freezing process, it is ensured that frost wall
Formed and the security in digging process.By geological prospecting, it can obtain freezing the flow condition of aquifer water-bearing stratum, if underground water
Flow velocity is less than 5m/d, it is only necessary to freezed, it is not necessary to stratum grouting and reinforcing is carried out after freezing；If groundwater velocity be 5m/d~
20m/d, can be freezed by increasing freezing pipe quantity, reducing the methods such as the temperature for freezing liquid, the caliber for increasing freezing pipe, be frozen
Need to carry out stratum grouting and reinforcing after knot；If groundwater velocity is more than 20m/d, need again to enter after first carrying out stratum grouting and reinforcing
Row freezes.Above-mentioned groundwater velocity is only term of reference, and Practical Project geological state should be combined during construction, is suitably adjusted.
(4) if groundwater velocity is more than 20m/d, need first to carry out again to be freezed after the grouting and reinforcing of stratum to choose the
A kind of construction method, carries out pre-pouring grout water blockoff to stratum containing Groundwater Flow by freezing preceding pre-pouring grout, reduces due to current
The loss of refrigeration capacity for flowing and causing so that the friendship circle of freezing pipe is more prone to, and shortens duration of freezing, and ensure that frost wall
Uniformly freeze, it is ensured that the security in frost wall formation and digging process.
(5) if groundwater velocity is 5m/d~20m/d, the temperature of liquid can be freezed by increasing freezing pipe quantity, reduction, increased
The methods such as the caliber of big freezing pipe are freezed, and need to carry out stratum grouting and reinforcing after freezing.Second of construction method is chosen,
Water blockoff is carried out to stratum containing Groundwater Flow by frost wall freeze thawing grouting behind shaft or drift lining, it is therefore prevented that a large amount of effect of water pressure on the borehole wall,
Reduce the seepage flow damage of the borehole wall, it is ensured that using for the borehole wall is safe.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not constitute inappropriate limitation of the present invention.Wherein：
Fig. 1 is the overall system architecture schematic diagram of one embodiment of the invention；
Fig. 2 is the structural representation in Fig. 1 embodiment middle external tubes；
Fig. 3 is the diagrammatic cross-section of embodiment in Fig. 1；
Fig. 4 is the outer tube structure schematic diagram in Fig. 1 embodiments；
Fig. 5 is the first construction method flow chart of one embodiment of the invention；
Fig. 6 is second of construction method flow chart of one embodiment of the invention.
Description of reference numerals：1st, salt solution feed pipe, 2, outer tube, 3, salt solution outlet end, 4, slurries feed flow end, 5, air compressor machine,
6th, grouting pump, 7, three-way pipe, 8, venting ball valve, 9, grouting pressure table, 10, enter to starch ball valve, 11, connecting tube, 12, salt solution helix tube
Road, 13, slip casting helical pipe, 14, upper end helical baffle, 15, lower end helical baffle, 16, slurries slurry outlet, 17, slurry pressure passes
Sensor, 18, solidification point sensor, 19, frozen soil, 20, non-frozen soil body.
Embodiment
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.It should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the application can be mutually combined.
In the description of the invention, term " longitudinal direction ", " transverse direction ", " on ", " under ", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " top ", " bottom " are, based on orientation shown in the drawings or position relationship, to be only
For the ease of the description present invention rather than require that the present invention must be therefore it is not intended that right with specific azimuth configuration and operation
The limitation of the present invention.The term " connected " that is used in the present invention, " connection " should be interpreted broadly, for example, it may be fixedly connected,
Can also be detachably connected；Can be joined directly together, can also be indirectly connected to by intermediate member, for the common of this area
For technical staff, the concrete meaning of above-mentioned term can be understood as the case may be.
As shown in Figures 1 to 4, there is provided a kind of double-screw type slip casting type freezing plant, bag for embodiments in accordance with the present invention
Double-screw type slip casting type freezing pipe is included, double-screw type slip casting type freezing pipe includes salt solution feed pipe 1 and is enclosed on outside salt solution feed pipe 1
The outer tube 2 in portion, is provided with two helical ducts, two helical ducts between the tube wall of salt solution feed pipe 1 and the tube wall of outer tube 2
Tube wall is shared with salt solution feed pipe 1 and outer tube 2, wherein a helical duct is salt solution helical pipe 12, another spiral leads to
Road is slip casting helical pipe 13；Salt solution helical pipe 12 is used as ground as the passage for freezing brine recycling, slip casting helical pipe 13
The passage of layer slip casting.
Two holes are provided with the upper end tube wall of outer tube 2, two holes are respectively as salt solution outlet end 3 and slurries feed flow end 4, salt
Water outlet end 3 is connected with the hypothermic saline circulatory system, and slurries feed flow end 4 is connected with slurries supply system, it is ensured that hypothermic saline
Circularly cooling, recycle.Multiple slurries slurry outlets 16 are provided with outer tube 2.
Slurries feed flow end 4 is connected with one end of connecting tube 11, is provided with connecting tube 11 into slurry ball valve 10, connecting tube 11
The other end is connected with an end of three-way pipe 7, in the connecting tube 11 for entering to starch between ball valve 10 and three-way pipe 7 (preferably adjacent to
At the position of three-way pipe 7) grouting pressure table 9 is provided with, second end of three-way pipe 7 is provided with venting ball valve 8, three-way pipe 7
The 3rd end be connected with grouting pump 6, grouting pump 6 pressure gauge be installed, grouting pump 6 is connected with air compressor machine 5.
Double-screw type slip casting type freezing pipe is by the concentric bilayer cylinder nested with outer tube 2 of salt solution feed pipe 1.Pass through
Concentrically nested integration is cast, it is ensured that the salt solution helical pipe 12 that the uniform inwall around salt solution feed pipe 1 and outer tube 2 is made
With slip casting helical pipe 13 so that salt solution helical pipe 12 and slip casting helical pipe 13 can provide the salt solution of uniform spiral flowing
And slurries.Facilitated spiral salt solution helical pipe 12 is arranged to for the brine pipeline freezed in freezing process, it is low
The bottom of warm saline from salt solution feed pipe 1 is flowed upwards out, and is flowed in the shape of a spiral around salt solution feed pipe 1, that is, increases flow velocity,
Improve and freeze efficiency, and sufficiently absorb the cold of hypothermic saline in salt solution feed pipe 1.Spiral slip casting spiral is set
Pipeline 13 is easy to during slip casting, and slurries are flowed downward out from slurries feed end 4, and is flowed in the shape of a spiral around salt solution feed pipe 1
It is dynamic, on the premise of not influenceing to freeze, grouting for water blocking is carried out to there is the stratum of Groundwater Flow, the shape around outer tube 2
Into frozen soil 19, the periphery of frozen soil 19 is non-frozen soil body 20, improves the stability on stratum.
Further, the upper end of slip casting helical pipe 13 is provided with upper end helical baffle 14, slip casting helical pipe 13
End is provided with lower end helical baffle 15.Lower end helical baffle 15 avoids the hypothermic saline flowed out by salt solution feed pipe 1 and flows into note
Helical pipe 13 is starched, upper end helical baffle 14, which avoids the slurries flowed into by slurries feed flow end 4 and flowed into, freezes salt solution helical pipe
12, it is ensured that freeze the separate flowing with hypothermic saline and grouting serous fluid.Salt solution feed pipe 1, outer tube 2, freeze salt solution spiral shell
Coil road 12 and slip casting helical pipe 13 can be made of low temperature mild steel, and ordinary carbon steel can be avoided using low temperature carbon steel
Under cryogenic because toughness reduces the fracture of freezing pipe accident for occurring brittle failure and causing.
Further, multiple slurries slurry outlets 16 on outer tube 2 in the shape of a spiral distribution and with the position of slip casting helical pipe 13
Put correspondence.Slurries slurry outlet 16 is distributed in the shape of a spiral to be easy to during slip casting, and slurries can be with salt solution feed pipe 1 in the shape of a spiral
Slip casting is carried out to stratum, it is to avoid the problem of slip casting for carrying out slip casting in a direction and bringing is uneven.
Further, multiple grouting pressure sensors 17 are installed on outer tube 2.Preferably, multiple grouting pressure sensors
17 are distributed and corresponding with the position of slip casting helical pipe 13 in the shape of a spiral on outer tube 2, and grouting pressure sensor 17 goes out with slurries
Starch the distribution of the batch (-type) of hole 16.The slip casting on the stratum during slip casting can be monitored in real time by being arranged such grouting pressure sensor 17
Pressure, and then the intensity and progress of slip casting can be effectively controlled, while spiral distribution can improve the reliability of monitoring.
Further, multiple solidification point sensors 18 are installed, multiple solidification point sensors 18 are in outer tube on outer tube 2
It is distributed in the shape of a spiral and corresponding with the position of salt solution helical pipe 12 on 2.Being arranged such solidification point sensor 18 can be real-time
Monitoring stratum in freezing process and frozen-thaw process temperature change, and then reasonably freezing strength and time can be entered
Row effectively control, efficiency is freezed in raising, while spiral distribution can improve the reliability of monitoring.
Further, slurries feed flow end 4 is welded to connect with connecting tube 11.The outside weld connecting tube 11 of slurries feed flow end 4, connecting tube
Slurry ball valve 10 is installed on 11, and is connected with three-way pipe 7.By in the connecting tube 11 for entering to starch between ball valve 10 and three-way pipe 7
(at the position of three-way pipe 7) sets grouting pressure table 9 to observe the change of grouting pressure, it is to avoid because pressure is excessive
And damaged to entirely freezing grouting device.The lower end of three-way pipe 7 is provided with venting ball valve 8, to observe slurry before slip casting
The mobility status of liquid, the other end of three-way pipe 7 is connected with grouting pump 6.Pressure gauge is installed on grouting pump 6, is easy to control slip casting
The intensity of the defeated slurry of pump 6, grouting pump 6 is connected with air compressor machine 5.
The invention also discloses a kind of construction method using above-mentioned double-screw type slip casting type freezing plant, as shown in figure 5,
Comprise the following steps：
(1) build construction foot stool, drilling equipment is installed；
(2) perpendicularity of drilling rod in drilling equipment is verified, freezing hole is bored；
(3) it is put into double-screw type slip casting type freezing pipe in freezing hole, and by the top of double-screw type slip casting type freezing pipe
It is welded on support；
(4) perpendicularity of double-screw type slip casting type freezing pipe is detected using theodolite Inclination Measurement by Light method, then repetition measurement freezes
The depth in hole, and carry out salt solution helical duct and suppress leak test；
(5) by after grouting equipment and corollary equipment all connection, check whether slip casting helical pipe 13 is normal, checks nothing
Grouting pump 6 is connected into slurries and pneumatic air compressor machine 5 after by mistake, venting ball valve 8 is opened, closes into slurry ball valve 10, treat in venting ball valve 8
When having slurries outflow, slurries situation is observed, venting ball valve 8 is closed, opened into 10 pairs of 13 pairs of utilization slip casting helical pipes of slurry ball valve
The soil body carries out freezing preceding pre-pouring grout；
(6) install and freeze station equipment, debugged, test running, and leak test is suppressed to the progress of salt solution helical duct is secondary；
(7) actively freezed after freezing system works well；
(8) after main structure construction is finished, stopping is freezed, extracts double-screw type slip casting type freezing pipe and fill out freezing hole
It is real.
In this construction method, slip casting, the slurries of use are carried out to slip casting helical pipe 13 before Freezing stratum as rapid construction
For low temperature resistant injecting paste material, (composition of low temperature resistant injecting paste material herein refers to application number respectively CN201510700150.8
With the low temperature resistant injecting paste material in CN201310333588.8 application for a patent for invention), it is to avoid made due to freezing after slip casting
Low temperature can not be born into institute's injection slurry and is failed.
The invention also discloses another construction method using above-mentioned double-screw type slip casting type freezing plant, such as Fig. 6 institutes
Show, comprise the following steps：
(1) build construction foot stool, drilling equipment is installed；
(2) perpendicularity of drilling rod in drilling equipment is verified, freezing hole is bored；
(3) it is put into freezing hole shaping double-screw type slip casting type freezing pipe, and by double-screw type slip casting type freezing pipe
Top is welded on support；
(4) perpendicularity of double-screw type slip casting type freezing pipe is detected using theodolite Inclination Measurement by Light method, then repetition measurement freezes
Hole depth, and carry out salt solution helical duct and suppress leak test；
(5) install and freeze station equipment, debugged, test running；
(6) actively freezed after freezing system works well；
(7) after main structure construction is finished, stop freezing；
(8) by after grouting equipment and corollary equipment all connection, check whether slip casting helical pipe 13 is normal, checks nothing
Grouting pump 6 is connected into slurries and pneumatic air compressor machine 5 after by mistake, venting ball valve 8 is opened, closes into slurry ball valve 10, treat in venting ball valve 8
When having slurries outflow, slurries situation is observed, venting ball valve 8 is closed, opens and slip casting helical pipe 13 is frozen into slurry ball valve 10
Tie grouting behind shaft or drift lining.
In this construction method, slip casting is carried out to slip casting helical pipe 13 after frost wall freeze thawing, the slurries of use can
For general injecting paste material, (general injecting paste material can carry out mortar depositing construction at normal temperatures, based on cement-based grout：Unconsolidated formation with
Based on cement-fly ash slurries, wind oxidized zone adds triethanolamine, salt or waterglass if necessary based on single liquid cement mortar
As external additive, to adjust serum viscosity and first final setting time) or low temperature resistant injecting paste material, it is respectively suitable for frozen soil complete
With the grouting in soil mass of frost free period after defrosting.
As can be seen from the above description, the above embodiments of the present invention realize following technique effect：
Double-screw type slip casting type freezing plant and construction method that the present invention is provided, overcome existing freezing pipe and freezing process
Construction technology current flowing when freezing stratum containing Groundwater Flow causes substantial amounts of loss of refrigeration capacity, frost wall are extremely difficult hand over circle, freeze
The knot cycle is longer, can not ensure frost wall uniformly freezes, outer shaft wall is excessive and can not be by slip casting with freezing by water pressure after freeze thawing
The problems such as knot construction is combined.Different sequences of construction can be chosen by geological prospecting, by freezing preceding pre-pouring grout or freezing
The flowing of the effective control freezing stratum water of grouting behind shaft or drift lining, and the pressure and the temperature of freezing process of detection slip casting in real time, favorably
Rationally controlled in slip casting and freezing process, it is ensured that the security in frost wall formation and digging process.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of double-screw type slip casting type freezing plant, it is characterised in that including double-screw type slip casting type freezing pipe, described pair of spiral shell
Rotating slip casting type freezing pipe includes salt solution feed pipe and the outer tube being enclosed on outside the salt solution feed pipe, in the salt solution feed pipe
Tube wall and the outer tube tube wall between be provided with two helical ducts, two helical ducts with the salt solution feed flow
Pipe and the outer tube share tube wall, wherein a helical duct is salt solution helical pipe, another helical duct is
Slip casting helical pipe；
Two holes are provided with the upper end tube wall of the outer tube, two holes respectively as salt solution outlet end and slurries feed flow end,
Multiple slurries slurry outlets are provided with the outer tube；
The slurries feed flow end, which is connected with one end of connecting tube, the connecting tube, to be provided with into slurry ball valve, the connecting tube
The other end is connected with an end of three-way pipe, enters to starch and be provided with note in connecting tube between ball valve and the three-way pipe described
Pressure gauge is starched, second end of the three-way pipe is provided with venting ball valve, and the 3rd end of the three-way pipe is connected with note
Pressure gauge is installed, the grouting pump is connected with air compressor machine on stock pump, the grouting pump.
2. double-screw type slip casting type freezing plant according to claim 1, it is characterised in that the slip casting helical pipe
Upper end is provided with upper end helical baffle, and the lower end of the slip casting helical pipe is provided with lower end helical baffle.
3. double-screw type slip casting type freezing plant according to claim 1, it is characterised in that the salt solution feed pipe, institute
Outer tube, salt solution helical pipe and the slip casting helical pipe of freezing is stated to be made of low temperature mild steel；
Preferably, the slurries feed flow end is welded to connect with the connecting tube.
4. double-screw type slip casting type freezing plant according to claim 1, it is characterised in that multiple slurries slurry outlets
It is distributed in the shape of a spiral and corresponding with the position of the slip casting helical pipe on the outer tube.
5. double-screw type slip casting type freezing plant according to claim 4, it is characterised in that be provided with the outer tube many
Individual grouting pressure sensor；Preferably, multiple grouting pressure sensors on the outer tube in the shape of a spiral distribution and with institute
The position correspondence of slip casting helical pipe is stated, the grouting pressure sensor is distributed with the slurries slurry outlet batch (-type).
6. double-screw type slip casting type freezing plant according to claim 1, it is characterised in that be provided with the outer tube many
Individual solidification point sensor, multiple solidification point sensors on the outer tube in the shape of a spiral distribution and with the salt solution spiral shell
The position correspondence in coil road.
7. using the construction method of the double-screw type slip casting type freezing plant any one of claim 1~6, its feature exists
In comprising the following steps：
(1) vertical freezing hole, and the installation double-screw type slip casting type freezing pipe in the freezing hole are bored in the soil body；
(2) grouting equipment is used, inject injecting paste material by slip casting helical pipe carries out freezing preceding pre-pouring grout to the soil body；
(3) freezing system is used, refrigerant is injected by salt solution helical duct the soil body is freezed.
8. method according to claim 7, it is characterised in that
Methods described is additionally included in hanging down using theodolite Inclination Measurement by Light method detection double-screw type slip casting type freezing pipe in step (1)
Straight degree, the then depth of repetition measurement freezing hole, and carry out the step of salt solution helical duct suppresses leak test；
Preferably, in step (2), after grouting equipment and corollary equipment are all connected, whether slip casting helical pipe is checked
Normally, grouting pump is connected into slurries and pneumatic air compressor machine after inspection is errorless, venting ball valve is opened, closes into slurry ball valve, wait to be vented
When having slurries outflow in ball valve, slurries situation is observed, venting ball valve is closed, opens into slurry ball valve, utilize slip casting helical pipe pair
The soil body carries out freezing preceding pre-pouring grout；
Preferably, methods described, which is additionally included in install between step (2) and step (3), freezes station equipment, is debugged, test run
The step of turning, and leak test suppressed to the progress of salt solution helical duct is secondary.
9. using the another construction method of the double-screw type slip casting type freezing plant any one of claim 1~6, it is special
Levy and be, comprise the following steps：
(1) vertical freezing hole, and the installation double-screw type slip casting type freezing pipe in the freezing hole are bored in the soil body；
(2) freezing system is used, refrigerant is injected by salt solution helical duct the soil body is freezed；
(3) grouting equipment is used, inject injecting paste material by slip casting helical pipe carries out freezing grouting behind shaft or drift lining to the soil body.
10. method according to claim 9, it is characterised in that
Methods described is additionally included in hanging down using theodolite Inclination Measurement by Light method detection double-screw type slip casting type freezing pipe in step (1)
Straight degree, the then depth of repetition measurement freezing hole, and carry out the step of salt solution helical duct suppresses leak test；
Preferably, methods described, which is additionally included in install between step (1) and step (2), freezes station equipment, is debugged, test running
The step of；
Preferably, in step (3), after grouting equipment and corollary equipment are all connected, whether slip casting helical pipe is checked
Normally, grouting pump is connected into slurries and pneumatic air compressor machine after inspection is errorless, venting ball valve is opened, closes into slurry ball valve, wait to be vented
When having slurries outflow in ball valve, slurries situation is observed, venting ball valve is closed, opens into slurry ball valve, utilize slip casting helical pipe pair
The soil body carries out freezing grouting behind shaft or drift lining.
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| CN108086301A (en) * | 2018-01-31 | 2018-05-29 | 王楠 | Sensitivity is built, structures reinforce deformation controller in hole |
| CN110159273A (en) * | 2019-06-18 | 2019-08-23 | 中国水利水电第八工程局有限公司 | It is a kind of with flowing to the construction freezing method of handoff functionality with every leaky refrigerating plant |
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