CN215830506U - Synchronous double-liquid grouting device - Google Patents
Synchronous double-liquid grouting device Download PDFInfo
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- CN215830506U CN215830506U CN202122073011.0U CN202122073011U CN215830506U CN 215830506 U CN215830506 U CN 215830506U CN 202122073011 U CN202122073011 U CN 202122073011U CN 215830506 U CN215830506 U CN 215830506U
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Abstract
The utility model discloses a synchronous double-liquid grouting device which comprises a mortar pipeline (3), a mixing device (5) and a water glass pipeline (8), wherein the mixing device (5) is provided with three or more joints, a first joint of the mixing device (5) is communicated with a shield tail synchronous grouting pipeline (11), a second joint of the mixing device (5) is communicated with the mortar pipeline (3), and a third joint of the mixing device (5) is communicated with the water glass pipeline (8). The synchronous double-liquid grouting device disclosed by the utility model has a simple and ingenious structure, can optimize the initial setting effect of slurry, slow down the upward floating of the pipe piece, avoid the ground settlement, and has extremely high application and popularization values.
Description
Technical Field
The utility model belongs to the technical field of shield construction, and particularly relates to a synchronous double-liquid grouting device in a shield tunneling construction process.
Background
In the shield tunneling construction process, gaps exist due to the fact that the cutter head excavation outline is compared with the outer diameter of the assembled duct piece, in the shield advancing process, the gaps outside the duct piece need to be uniformly filled, the existing synchronous grouting materials are all mortar, the solidification time is long, the duct piece floating amount is large, the post-construction settlement is large, particularly in a shallow earthing stratum, surface pipelines and buildings are easily damaged, and the extremely bad social influence is caused. Along with the development in city, the extra large diameter slurry shield constructs more and more generally, subsides the requirement to the earth's surface in city main city district more and more high, and in order to reduce the section of jurisdiction come-up, the strict control earth's surface subsides, the utility model discloses the people has designed the device of synchronous biliquid slip casting at research and development and practice in-process, can effectively solve above-mentioned problem.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a synchronous double-liquid grouting device, which solves the problems that the existing synchronous grouting materials are all mortar, the solidification time is long, the floating amount of a duct piece is large, the post-construction settlement is large, and particularly, a surface pipeline and a building are easily damaged in a shallow soil-covered stratum.
The utility model is realized by the following technical scheme:
the utility model provides a synchronous double-liquid grouting device which comprises a mortar pipeline, a mixing device and a water glass pipeline, wherein the mixing device is provided with three or more joints, a first joint of the mixing device is communicated with a shield tail synchronous grouting pipeline, a second joint of the mixing device is communicated with the mortar pipeline, and a third joint of the mixing device is communicated with the water glass pipeline. Through adopting above-mentioned technical scheme, mortar and water glass pour into shield tail slip casting pipeline into simultaneously, fill to the peripheral back space of shield pipe piece in synchronous slip casting thick liquid export, form synchronous slip casting thick liquid obturator, "water glass" (the chemical composition is "sodium silicate") can make cement just take place to solidify, the sclerosis in the short time, just also make their mixed back mortar will shorten than original setting time, optimize the initial setting effect, wrap up the fixed shield pipe piece, prevent the section of jurisdiction come-up, avoid the earth's surface to subside.
As a further improvement of the utility model, the shield tail synchronous grouting pipeline is positioned in a shell of the shield machine, the tail end of the shield tail synchronous grouting pipeline is a synchronous grouting slurry outlet, and the synchronous grouting slurry outlet is positioned at the periphery of a shield segment. Through adopting above-mentioned technical scheme, the mortar that the configuration is good is stored in the mortar jar, and accessible power pump is carried to mixing arrangement through the mortar pipeline.
As a further improvement of the present invention, the mortar pipe is connected to the mortar tank through a first control valve; a second control valve is arranged between the mortar pipeline and a second joint of the mixing device; the water glass pipeline is connected to the water glass grouting tank through a third control valve; and a fourth control valve is arranged between the water glass pipeline and the third joint of the mixing device. The first control valve can control the on-off between the mortar pipeline and the mortar tank, so that the mortar can be accurately controlled and conveyed conveniently. And a second control valve is arranged between the mortar pipeline and a second joint of the mixing device, so that the mortar pipeline can be closed/opened conveniently in time. The water glass pipeline is connected to the water glass grouting tank through a third control valve. The prepared water glass is stored in a water glass grouting tank and can be conveyed to a mixing device through a power pump and a water glass pipeline. The third control valve can control the on-off between the water glass pipeline and the water glass grouting tank, so that the water glass can be accurately controlled and conveyed conveniently. And a fourth control valve is arranged between the water glass pipeline and a third joint of the mixing device, so that the water glass pipeline can be closed/opened in time.
As a further improvement of the utility model, the mixing device is a three-way joint. And respectively injecting mortar and water glass into the tee joint and mixing the mortar and the water glass by the mortar pipeline and the water glass pipeline, and then entering the shield tail synchronous grouting pipeline through the tee joint.
As a further improvement of the utility model, the mixing device is provided with four joints which are four-way joints. Two joints can be selected to be communicated with the mortar pipeline, so that the mortar injection efficiency can be increased, and the injection volume ratio of the mortar and the water glass is controlled within a required range. The mixing device is provided with four connectors, and on the basis of the use principle of the three-way connector, the extra connectors can also be selected to be temporarily stopped, and can be started again when meeting other special conditions.
As a further improvement of the utility model, the mixing device comprises a water glass joint and a mortar pipe joint, wherein the water glass joint is sleeved in the mortar pipe joint. The water glass joint comprises a water glass joint inlet, and the water glass joint inlet is connected with a water glass pipeline; the mortar pipe joint comprises more than one mortar pipe joint inlet, and the mortar pipe joint inlets are connected with the mortar pipeline. The water glass joint is sleeved in the mortar pipe joint, so that the mortar pipe joint is convenient to mount and dismount, and meanwhile, the mortar and the water glass inlet are isolated through partitioning, so that direct reaction and uneven reaction of the mortar and the water glass are avoided, and the setting time of the mortar and the water glass can be effectively prolonged.
As a further improvement of the utility model, the diameter of the inner cavity of the water glass joint is gradually reduced from the inlet to the outlet, and the water glass nozzle is arranged at the outlet of the water glass joint. The diameter of the inner cavity of the water glass joint is gradually reduced from the inlet to the outlet, so that the spraying speed of the water glass can be accelerated, the pressure of the inner cavity of the water glass joint is increased, and the mortar is prevented from overflowing; the cross-sectional area of the water glass nozzle is gradually reduced along with the flow direction of the water glass, so that the mortar can be prevented from entering the water glass joint, and the water glass and the mortar are prevented from being condensed in the inner cavity of the water glass joint to cause blockage. The water glass nozzle is sleeved, internally clamped or screwed in the water glass joint cavity. After the water glass nozzle is used for a long time, the water glass nozzle is large in loss and convenient to replace through detachable connection.
As a further improvement of the utility model, a uniform resistance device is arranged in front of the water glass spray head and is connected with the inner cavity wall of the mortar pipe joint through a bracket or a silk thread. The uniform resistance device is arranged right in front of the water glass spray head, when the water glass is sprayed out, the uniform resistance device is just hit on the uniform resistance device to diffuse all around, and the uniform resistance device is fully mixed with the mortar all around. The middle part of the uniform resistance device is arc-shaped, and the resistance of the water glass sprayed on the uniform resistance device is small, but the water glass can be well shunted to the periphery. The water glass pipeline is provided with a water glass flow controller, and the mortar pipeline is provided with a mortar flow controller.
As a further improvement of the utility model, the mortar pipe joint comprises a feeding cavity and a discharging cavity, and the outlet of the water glass spray head extends into the discharging cavity. If the water glass spray head is too short, mortar can overflow into the water glass joint, so that the water glass spray head is blocked; and after the outlet of the water glass spray head extends to the discharging cavity, the siphon force of the discharging cavity of the mortar pipe joint can effectively prevent mortar from overflowing, so that the blockage of the water glass joint is avoided, meanwhile, the connection tightness of the water glass joint and the mortar pipe joint is improved, and the service life of the water glass spray head is prolonged.
The section of the joint of the feeding cavity and the discharging cavity is a central axial plane, the section area of the central axial plane is smaller than the section areas of other positions of the feeding cavity, and the section area of the central axial plane is smaller than the section areas of other positions of the discharging cavity. The cross section area from the feeding cavity to the middle shaft surface is gradually reduced, so that a pressurizing process is generated on the slurry in the cavity; the cross sectional area of the discharging cavity to the middle axial surface is gradually increased, when slurry enters the discharging cavity, a spraying effect can be generated, and the outlet of the water glass sprayer is arranged in the discharging cavity, so that the loss of the water glass sprayer is reduced.
As a further improvement of the utility model, a connecting pipeline is arranged between the mixing device and the shield tail synchronous grouting pipeline, and a pressure sensor is arranged on the connecting pipeline. Through adopting above-mentioned technical scheme, pressure sensor can feed back slip casting pressure in real time, is convenient for open according to the condition control slip casting of pressure and stops.
As a further improvement of the utility model, a water glass flow controller is arranged on the water glass pipeline, and a mortar flow controller is arranged on the mortar pipeline. The flow control of the water glass and the mortar is convenient.
The synchronous double-liquid grouting method adopts the synchronous double-liquid grouting device to perform synchronous and uniform grouting when the shield machine is propelled, wherein the mortar: the volume ratio of the water glass is 15-30: 1, pouring mortar and water glass at a mixing device, and filling a peripheral gap at the back of a shield segment through a shield tail synchronous grouting pipeline and a synchronous grouting slurry outlet to form a synchronous grouting slurry filling body. Mortar and water glass are synchronously grouted when the shield tunneling machine is propelled, grouting can be controlled and adjusted at any time, even if equipment in the construction process breaks down and needs to be shut down, the machine can be shut down in time, and grouting pipeline blockage cannot be caused. The traditional mortar and water glass are alternately injected into the stratum in turn, and the effect of uniform solidification of concrete cannot be achieved; by adopting the concrete directly mixed by the mortar and the water glass, once the concrete in the pipeline stays for a long time in case of shutdown or other conditions, the concrete is easy to solidify and block the pipeline and damage equipment, so that great economic loss is caused and the construction period is delayed.
When the synchronous double-liquid grouting device is started, mortar is firstly injected into the mixing device through the mortar pipeline, and water glass is injected through the water glass pipeline after the mortar is fully injected into the mixing device and enters the shield tail synchronous grouting pipeline to overflow; and stopping injecting the water glass in the water glass pipeline and then stopping injecting the mortar in the mortar pipeline before a fault or halt.
The shield machine is provided with at least two injection points, and each injection point is provided with a synchronous double-liquid grouting device. Through adopting above-mentioned technical scheme, the setting of a plurality of injection points can supply synchronous two liquid slip casting devices to pour into two liquid in turn, can guarantee the injection effect on the one hand, improves the initial set effect, and on the other hand can avoid the pipeline to block up.
The injection points are six for use and ten for standby. By adopting the technical scheme, the plurality of standby injection points are reasonably arranged, the synchronous double-liquid grouting device can be alternately used for injecting double liquid, and the standby injection points can avoid the delay of the construction period due to the blockage of the pipelines of part of the injection points.
According to the synchronous double-liquid grouting method, mortar and water glass are uniformly and synchronously injected by adopting the synchronous double-liquid grouting device in any scheme according to the advancing speed of the shield tunneling machine, the mortar and the water glass are converged at the mixing device, and a synchronous grouting slurry outlet is filled into a peripheral gap at the back of a shield segment through a shield tail synchronous grouting pipeline to form a synchronous grouting slurry filling body. Mortar and water glass evenly pour into shield tail slip casting pipeline in step, join through mixing arrangement, pack to the peripheral back space of shield pipe piece in synchronous slip casting thick liquid export, form synchronous slip casting thick liquid obturator, shorten than original setting time, can optimize the initial set effect, fixed shield pipe piece prevents the section of jurisdiction come-up, avoids the earth's surface to subside. Starting two synchronous double-liquid grouting pipelines by using a single ring, injecting mortar and water glass into each synchronous double-liquid grouting pipeline, closing water glass injection by other pipelines, and injecting the mortar; when the periphery of the next ring of shield segment is grouted, another two synchronous double-liquid grouting pipelines are started, mortar and water glass are injected into each synchronous double-liquid grouting pipeline, and the water glass injection is closed by the other pipelines to inject the mortar. Through adopting above-mentioned technical scheme, the synchronous biliquid slip casting pipeline that uses in turn can guarantee the injection effect, prevents that the pipeline from blockking up.
The synchronous double-liquid grouting device at least has the following beneficial effects: the structure is ingenious, and is convenient to use, and the synchronous injection of mortar and water glass of being convenient for carries the peripheral back space of section of jurisdiction through the synchronous slip casting pipeline of shield tail, optimizes the solidification effect, prevents the section of jurisdiction come-up, alleviates the earth's surface and subsides.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic structural diagram of a synchronous double-liquid grouting device according to an embodiment of the utility model;
FIG. 2 is another schematic structural diagram of a synchronous double-liquid grouting device according to an embodiment of the utility model;
fig. 3 is a partial structural diagram of fig. 2.
Fig. 4 is a schematic structural view of the mixing device.
In the figure: 1-mortar tank; 2 — a first control valve; 3-mortar pipeline; 4-a second control valve; 5-a mixing device; 6-water glass grouting tank; 7-a third control valve; 8-water glass pipeline; 9-a fourth control valve; 10-a pressure sensor; 11-shield tail synchronous grouting pipeline; 111-shield tail synchronous grouting standby pipeline; 12-shield tail wire brush; 13-synchronous grouting slurry outlet; 14-synchronous grouting slurry filling body; 15-shield segment; 16-synchronously grouting a first injection point position; 17-synchronous grouting second injection point position; 18-synchronous grouting third injection point position; 19-synchronous grouting at the fourth injection point; 20-synchronous grouting at the fifth injection point; 21-synchronous grouting at the injection point position of No. six; 100-a shield machine; 51-water glass joint; 52-mortar pipe joint; 511-water glass joint inlet; 512-water glass spray head; 521-mortar pipe joint inlet; 522-resistance homogenizing device; 523-central axis plane; 524-feed chamber; 525-discharge cavity; 31-mortar flow controller; 81-water glass flow controller.
Detailed Description
To further illustrate the technical means and effects of the present invention for achieving the intended purpose of the utility model, the following detailed description of the preferred embodiments, structures, features and effects according to the present invention will be given below.
In the description of the present application, it is to be understood that the terms "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the indicated orientations and positional relationships based on the orientation shown in the drawings for convenience in describing the application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting with respect to the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example 1
Referring to fig. 1 to 3, the utility model provides a synchronous double-liquid grouting device, which comprises a mortar pipeline 3, a mixing device 5 and a water glass pipeline 8, wherein the mixing device 5 is provided with three joints, a first joint of the mixing device 5 is communicated with a shield tail synchronous grouting pipeline 11, a second joint of the mixing device 5 is communicated with the mortar pipeline 3, and a third joint of the mixing device 5 is communicated with the water glass pipeline 8. Mortar and water glass pour into shield tail slip casting pipeline simultaneously, pack to the peripheral back space of shield section of jurisdiction in synchronous slip casting thick liquid export, form synchronous slip casting thick liquid obturator, "water glass" chemical composition is "sodium silicate" and can makes cement just take place to solidify, the sclerosis in the short time, just also make their mixed back mortar will shorten than original setting time, optimize the initial set effect, the fixed shield section of jurisdiction of parcel prevents the section of jurisdiction come-up, avoid the earth's surface to subside.
The shield tail synchronous grouting pipeline 11 is located in a shell of the shield machine 100, the tail end of the shield tail synchronous grouting pipeline 11 is a synchronous grouting slurry outlet 13, and the synchronous grouting slurry outlet 13 is located on the periphery of a shield segment 15. The prepared mortar is stored in a mortar tank and can be conveyed to a mixing device through a mortar pipeline by a power pump.
The mortar pipeline 3 is connected to the mortar tank 1 through a first control valve 2; a second control valve 4 is arranged between the mortar pipeline 3 and a second joint of the mixing device 5; the water glass pipeline 8 is connected to the water glass grouting tank 6 through a third control valve 7; a fourth control valve 9 is arranged between the water glass pipeline 8 and the third joint of the mixing device 5. The first control valve can control the on-off between the mortar pipeline and the mortar tank, so that the mortar can be accurately controlled and conveyed conveniently. And a second control valve is arranged between the mortar pipeline and a second joint of the mixing device, so that the mortar pipeline can be closed/opened conveniently in time. The water glass pipeline is connected to the water glass grouting tank through a third control valve. The prepared water glass is stored in a water glass grouting tank and can be conveyed to a mixing device through a power pump and a water glass pipeline. The third control valve can control the on-off between the water glass pipeline and the water glass grouting tank, so that the water glass can be accurately controlled and conveyed conveniently. And a fourth control valve is arranged between the water glass pipeline and a third joint of the mixing device, so that the water glass pipeline can be closed/opened in time.
The mixing device 5 is a three-way joint. And the mortar pipeline 3 and the water glass pipeline 8 respectively inject the mortar and the water glass into the tee joint and mix the mortar and the water glass, and then the mortar and the water glass enter the shield tail synchronous grouting pipeline 11 through the tee joint. The water glass pipeline 8 is provided with a one-way valve, and after the water glass conveying is stopped, the mortar can be prevented from overflowing and blocking the water glass pipeline 8.
A connecting pipeline is arranged between the mixing device 5 and the shield tail synchronous grouting pipeline 11, a pressure sensor 10 is arranged on the connecting pipeline, and a control valve is further arranged on the connecting pipeline. Through adopting above-mentioned technical scheme, pressure sensor can feed back slip casting pressure in real time, is convenient for open according to the condition control slip casting of pressure and stops. When the synchronous double-liquid grouting device needs to be shut down or maintained for a long time, a control valve on a connecting pipeline between the mixing device 5 and the shield tail synchronous grouting pipeline 11 is operated to be closed, clear water is injected through the water glass pipeline 8, and the clear water enters the mixing device 5 and then is discharged from the mortar pipeline 3, so that the purpose of protecting and cleaning the whole synchronous double-liquid grouting device is achieved.
The synchronous double-liquid grouting method adopts the synchronous double-liquid grouting device in the utility model to perform synchronous and uniform grouting when the shield machine 100 is propelled, wherein the mortar: the volume ratio of the water glass is 16: 1, the mortar and the water glass are converged at a mixing device 5, and a synchronous grouting slurry outlet 13 is filled into a peripheral gap at the back of a shield segment 15 through a shield tail synchronous grouting pipeline 11 to form a synchronous grouting slurry filling body 14. Mortar and water glass are synchronously grouted when the shield tunneling machine is propelled, grouting can be controlled and adjusted at any time, even if equipment in the construction process breaks down and needs to be shut down, the machine can be shut down in time, and grouting pipeline blockage cannot be caused. The traditional mortar and water glass are alternately injected into the stratum in turn, and the effect of uniform solidification of concrete cannot be achieved; by adopting the concrete directly mixed by the mortar and the water glass, once the concrete in the pipeline stays for a long time in case of shutdown or other conditions, the concrete is easy to solidify and block the pipeline and damage equipment, so that great economic loss is caused and the construction period is delayed. Preferably, the mortar: the volume ratio of the water glass is 16: 1, injecting, wherein if the water glass accounts for too much, the strength of the concrete is reduced, and the setting speed of the concrete is accelerated; the water glass has too small proportion and is not beneficial to condensation. Therefore, the water glass accounts for 1/17 in the total volume ratio, and the mortar has better setting speed and effect.
When the synchronous double-liquid grouting device is started, mortar is firstly injected into the mixing device 5 through the mortar pipeline 3, and after the mortar is fully injected into the mixing device 5 and enters the shield tail synchronous grouting pipeline 11 to overflow, water glass is injected through the water glass pipeline 8; when a fault or halt occurs, the injection of the water glass in the water glass pipeline 8 is stopped, and then the injection of the mortar in the mortar pipeline 3 is stopped.
Example 2
As shown in fig. 1, 2, 3 and 4, the present embodiment is different from embodiment 1 in that: the mixing device 5 is provided with four joints which are four-way joints. Two joints can be selected to be communicated with the mortar pipeline 3, so that the mortar injection efficiency can be increased, and the injection volume ratio of the mortar and the water glass is controlled within a required range. The mixing device 5 is provided with four connectors, and on the basis of the use principle of the three-way connector, the extra connectors can also be selected to be temporarily stopped, and can be started again when other special conditions are met.
Example 3
As shown in fig. 1, 2, 3 and 4, the present embodiment is different from embodiment 1 in that: the mixing device 5 comprises a water glass joint 51 and a mortar pipe joint 52, wherein the water glass joint 51 is sleeved in the mortar pipe joint 52. The water glass joint 51 comprises a water glass joint inlet 511, and the water glass joint inlet 511 is connected with the water glass pipeline 8; mortar pipe joint 52 includes more than one mortar pipe joint inlet 521, and mortar pipe joint inlet 521 is connected with mortar pipe 3. The water glass joint 51 is sleeved in the mortar pipe joint 52, so that the installation and the disassembly are convenient, and meanwhile, the mortar and the water glass inlet are isolated by partitioning, so that the direct reaction and the uneven reaction of the mortar and the water glass are avoided, and the setting time of the mortar and the water glass can be effectively prolonged.
The diameter of the inner cavity of the water glass joint 51 is gradually reduced from the inlet to the outlet, and a water glass spray head 512 is arranged at the outlet of the water glass joint 51. The diameter of the inner cavity of the water glass joint 51 is gradually reduced from the inlet to the outlet, so that the water glass injection speed can be accelerated, the pressure of the inner cavity of the water glass joint 51 is increased, and the mortar is prevented from overflowing; the cross-sectional area of the water glass nozzle 512 is gradually reduced along with the flow direction of the water glass, so that the mortar can be prevented from entering the water glass connector 51, and the water glass and the mortar are prevented from being condensed in the inner cavity of the water glass connector 51 to cause blockage. The water glass nozzle 512 is sleeved, clamped or screwed in the cavity of the water glass joint 51. After the water glass spray head 512 is used for a long time, the loss is large, and the water glass spray head is convenient to replace through detachable connection.
The front of the water glass spray head 512 is provided with a uniform resistance device 522, and the uniform resistance device 522 is connected with the inner cavity wall of the mortar pipe joint 52 through a bracket or a wire. The uniform resistance device 522 is arranged right in front of the water glass spray head 512, when the water glass is sprayed out, the water glass just hits the uniform resistance device 522 to be diffused all around, and is fully mixed with the mortar all around. The middle part of the uniform resistance device 522 is arc-shaped, and the resistance of the water glass sprayed on the uniform resistance device is small, but the water glass can be well shunted to the periphery. The water glass pipeline 8 is provided with a water glass flow controller 81, and the mortar pipeline 3 is provided with a mortar flow controller 31.
The section of the connection part of the feeding cavity 524 and the discharging cavity 525 is a central shaft surface 523, the section area of the central shaft surface 523 is smaller than the section areas of other positions of the feeding cavity 524, and the section area of the central shaft surface 523 is smaller than the section areas of other positions of the discharging cavity 525. The cross-sectional area from the feed chamber 524 to the medial axial surface 523 decreases gradually, thereby creating a pressurization process on the slurry within the chamber; the sectional area from the discharging cavity 525 to the middle shaft surface 523 is gradually increased, when slurry enters the discharging cavity 525, a spraying effect can be generated, and the outlet of the water glass sprayer 512 is arranged in the discharging cavity 525, so that the loss of the water glass sprayer 512 is reduced.
The synchronous double-liquid grouting method adopts the synchronous double-liquid grouting device in the utility model to perform synchronous and uniform grouting when the shield machine 100 is propelled, wherein the mortar: the volume ratio of the water glass is 20: 1, the mortar and the water glass are converged at a mixing device 5, and a synchronous grouting slurry outlet 13 is filled into a peripheral gap at the back of a shield segment 15 through a shield tail synchronous grouting pipeline 11 to form a synchronous grouting slurry filling body 14. In the embodiment, the preferred ratio of the water glass to the total volume is 1/21, the mortar setting speed is moderate, and the concrete setting effect and strength of the mixture ratio are better improved compared with those of the embodiment 1.
Example 4
As shown in fig. 1, 2, 3, and 4, in the present embodiment: synchronous biliquid slip casting device, including mortar pipeline 3, mixing arrangement 5, synchronous slip casting pipeline 11 of water glass pipeline 8 and shield tail, mixing arrangement 5's first joint intercommunication shield tail synchronous slip casting pipeline 11, mixing arrangement 5's second joint intercommunication mortar pipeline 3, mixing arrangement 5's third joint intercommunication water glass pipeline 8, shield tail synchronous slip casting pipeline 11 is located the casing of shield structure machine 100, shield tail synchronous slip casting pipeline 11's end is synchronous slip casting thick liquid export 13, synchronous slip casting thick liquid export 13 is located the periphery of shield structure section of jurisdiction 15. The inner wall of the tail part of the shield tunneling machine 100 is provided with a shield tail steel wire brush 12. The shield tail steel wire brush 12 is positioned outside the shield segment 15 of the next ring. A pressure sensor is arranged on the water glass pipeline 8, and a pressure sensor is arranged on the mortar pipeline 3.
The mortar pipe 3 is connected to the mortar tank 1 through the first control valve 2. A second control valve 4 is arranged between the mortar pipeline 3 and a second joint of the mixing device 5. The water glass line 8 is connected to the water glass grouting tank 6 through a third control valve 7. A fourth control valve 9 is arranged between the water glass pipeline 8 and the third joint of the mixing device 5. Each control valve adopts an automatic control mode to open or close the pipeline.
A pressure sensor 10 is arranged on a pipeline connecting the first joint of the mixing device 5 and the shield tail synchronous grouting pipeline 11. The pressure sensor can feed back grouting pressure in real time, the general double-control standard of grouting is realized, one controls grouting amount and the other controls grouting pressure, termination pressure can be set in advance, and the grouting can be stopped if the pressure of a certain pipeline is too high.
The shield machine is provided with at least two injection points, and each injection point is provided with a synchronous double-liquid grouting device. Each injection point is communicated with a shield tail synchronous grouting pipeline 11, the shield tail synchronous grouting pipelines 11 are mutually independent, the mortar pipelines 3 on the injection points are connected to the same mortar tank, and the water glass pipelines 8 are connected to the same water glass grouting tank. In other embodiments, other numbers of implant sites may be provided.
Preferably, the injection sites are six use/eight use, ten spare. And shield tail synchronous grouting standby pipelines 111 are arranged at the adjacent positions of the shield tail synchronous grouting pipeline 11 for six uses/eight uses. Of the ten spare injection points, two of the spare injection points are located on two sides of the top of the shield tunneling machine, namely on two sides of the top of the shield tunneling machine, and a shield tail synchronous grouting spare pipeline 111 is preset.
A synchronous double-liquid grouting method adopts the synchronous double-liquid grouting device of any scheme, and comprises the following steps:
the first step is as follows: and a mixing device 5 is arranged on the original mortar pipeline of the shield tunneling machine.
The second step is that: one end of a water glass pipeline 8 is connected with the mixing device 5, the other end of the water glass pipeline is connected with the water glass grouting tank 6, and a third control valve 7 and a fourth control valve 9 are installed on the water glass pipeline 8, so that the water glass pipeline can be closed/opened in time.
The third step: one end of the mortar pipeline 3 is connected with the mixing device 5, the other end of the mortar pipeline is connected with the mortar tank 1, and in addition, the first control valve 2 and the second control valve 4 are installed on the mortar pipeline 3, so that the mortar pipeline can be closed/opened conveniently in time.
The fourth step: before the shield is pushed, the prepared mortar is stored in a mortar tank 1, and the prepared water glass is stored in a water glass grouting tank 6.
The fifth step: according to the shield constructs quick-witted advancing speed, even synchronous injection theoretical mortar and water glass lets it converge in mixing arrangement 5 position, through shield tail synchronous grouting pipeline 11, fills to the 15 back spaces of shield segment in synchronous grouting thick liquid export 13, forms synchronous grouting thick liquid obturator 14, reaches the initial set effect early, wraps up fixed shield segment 15.
In the embodiment of the utility model, in order to avoid the shield tail blockage, a single ring is adopted to start two synchronous double-liquid grouting pipelines, mortar and water glass are injected into each synchronous double-liquid grouting pipeline, and the water glass injection is closed by other pipelines to inject the mortar; when the periphery of the next ring of shield segment is grouted, another two synchronous double-liquid grouting pipelines are started, mortar and water glass are injected into each synchronous double-liquid grouting pipeline, and the water glass injection is closed by the other pipelines to inject the mortar. In detail, 2 synchronous double-liquid grouting pipelines are started by adopting a single ring, the injection of water glass is closed through a fourth control valve 9, the first control valve 2 and the second control valve 4 are opened, mortar is injected, and the shield tail synchronous grouting pipeline 11 is ensured to be always kept unblocked by utilizing the mortar lubricating effect. And propelling the next ring of pipe pieces to switch the synchronous double-liquid grouting pipeline.
Example (c): the first ring starts a synchronous grouting first injection point 16 and a synchronous grouting fifth injection point 20, and the fourth control valve 9 is closed at other synchronous grouting points; the second ring starts a synchronous grouting second injection point position 17 and a synchronous grouting fourth injection point position 19, and the fourth control valve 9 is closed at other synchronous grouting point positions; the third ring starts the synchronous grouting third injection point 18 and the synchronous grouting sixth injection point 21, and the fourth control valve 9 is closed at other synchronous grouting points.
The synchronous double-liquid grouting method adopts the synchronous double-liquid grouting device in the utility model to perform synchronous and uniform grouting when the shield machine 100 is propelled, wherein the mortar: the volume ratio of the water glass is 23: 1, the mortar and the water glass are converged at a mixing device 5, and a synchronous grouting slurry outlet 13 is filled into a peripheral gap at the back of a shield segment 15 through a shield tail synchronous grouting pipeline 11 to form a synchronous grouting slurry filling body 14. In the embodiment, the ratio of the water glass to the total volume is preferably 1/23, when synchronous grouting is performed, 23 parts of mortar per ring, 1 part of water glass with Baume degree of 45 degrees, 24 parts in total, 19.1 parts of theoretical gaps outside each ring pipe sheet, 24 parts in actual injection and a filling coefficient of 1.256 are preferably performed. When the value near the ratio is selected, the mortar setting speed and the concrete setting effect and strength are optimal in actual construction, and the mortar setting speed and the concrete setting effect and strength are better improved in the embodiment 1 and the embodiment 2.
In other embodiments, the synchronous double-liquid grouting method, using the synchronous double-liquid grouting device of the present invention, performs synchronous uniform grouting when the shield tunneling machine 100 is propelled, wherein the mortar: the volume ratio of the water glass is as follows: 1, the mortar and the water glass are converged at a mixing device 5, and a synchronous grouting slurry outlet 13 is filled into a peripheral gap at the back of a shield segment 15 through a shield tail synchronous grouting pipeline 11 to form a synchronous grouting slurry filling body 14.
In the embodiment, the ratio of the water glass to the total volume is preferably 1/29, and the strength of the concrete prepared by the ratio is improved, but the mortar coagulation speed is obviously slowed down, and the coagulation effect is also poor.
Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the utility model is not limited to the disclosed embodiments, but is intended to cover various modifications, equivalents and alternatives falling within the spirit and scope of the utility model.
Claims (10)
1. Synchronous biliquid slip casting device, its characterized in that includes mortar pipeline (3), mixing arrangement (5), water glass pipeline (8), mixing arrangement (5) are equipped with three or three above and connect, and the first joint intercommunication shield tail of mixing arrangement (5) slip casting pipeline (11) in step, and the second of mixing arrangement (5) connects intercommunication mortar pipeline (3), and the third of mixing arrangement (5) connects intercommunication water glass pipeline (8).
2. The synchronous double-liquid grouting device according to claim 1, wherein the shield tail synchronous grouting pipeline (11) is located in a shell of the shield machine (100), the tail end of the shield tail synchronous grouting pipeline (11) is provided with a synchronous grouting slurry outlet (13), and the synchronous grouting slurry outlet (13) is located on the periphery of a shield segment (15).
3. The synchronous double-liquid grouting device according to claim 1, characterized in that the mortar line (3) is connected to a mortar tank (1) through a first control valve (2); a second control valve (4) is arranged between the mortar pipeline (3) and a second joint of the mixing device (5); the water glass pipeline (8) is connected to the water glass grouting tank (6) through a third control valve (7); a fourth control valve (9) is arranged between the water glass pipeline (8) and the third joint of the mixing device (5).
4. Synchronous double-fluid grouting device according to claim 1, characterized in that the mixing device (5) is a tee joint.
5. Synchronous double-liquid grouting device according to claim 1, characterized in that the mixing device (5) comprises a water glass joint (51) and a mortar pipe joint (52), the water glass joint (51) being nested inside the mortar pipe joint (52).
6. The synchronous double-liquid grouting device according to claim 5, characterized in that the diameter of the inner cavity of the water glass joint (51) is gradually reduced from the inlet to the outlet, and a water glass nozzle (512) is arranged at the outlet of the water glass joint (51).
7. The synchronous double-liquid grouting device as claimed in claim 6, wherein a uniform resistance device (522) is arranged in front of the water glass spray head (512), and the uniform resistance device (522) is connected with the inner cavity wall of the mortar pipe joint (52) through a bracket or a wire.
8. Synchronous double-liquid grouting device according to claim 6 or 7, characterized in that the mortar pipe joint (52) comprises a feed chamber (524) and a discharge chamber (525), the outlet of the water glass nozzle (512) extending into the discharge chamber (525).
9. The synchronous double-liquid grouting device according to claim 1, characterized in that a connecting pipeline is arranged between the mixing device and the synchronous grouting pipeline of the shield tail, and a pressure sensor (10) is arranged on the connecting pipeline.
10. The synchronous double-liquid grouting device according to claim 1, characterized in that a water glass flow controller (81) is arranged on the water glass pipeline (8), and a mortar flow controller (31) is arranged on the mortar pipeline (3).
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| CN202122073011.0U CN215830506U (en) | 2021-08-30 | 2021-08-30 | Synchronous double-liquid grouting device |
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| CN202122073011.0U CN215830506U (en) | 2021-08-30 | 2021-08-30 | Synchronous double-liquid grouting device |
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