In-situ solidifiable pipe jacking thixotropic mud and grouting system

Abstract

The application discloses an in-situ solidifiable pipe jacking thixotropic mud, and belongs to the technical field of pipe jacking mud main body construction, which comprises a mud main body and a solidified slurry, wherein the mud main body comprises bentonite, thickening stabilizer, dispersing agent, additive and xanthan gum, and the solidified slurry comprises high-calcium fly ash, cement and gypsum. The application further provides a grouting system of the in-situ solidifiable pipe jacking thixotropic mud, which comprises a first preparation machine, a second preparation machine, a driving pump, a controller and a grouting pipe, wherein the first preparation machine is used for preparing the mud main body; the second preparation machine is used for preparing the solidified slurry; the grouting pipe is in abutment with a pipe jacking pipe and detachably connected with the driving pump through a conversion assembly at one end. The application solves the problem that the thixotropic mud needs to be replaced after pipe jacking construction is completed, which greatly disturbs the soil, has remarkable effects and is suitable for wide popularization.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pipe jacking mud body construction technology, in particular to a pipe jacking thixotropic mud capable of curing in situ and a grouting system. BACKGROUND

[0002] At present, pipe jacking engineering is widely used in the development of urban underground space, among which, the key projects for people's livelihood such as urban underground street passage, subway station entrance and exit, underground pipe gallery and the like are mainly constructed by using rectangular pipe jacking, on the basis of ensuring the smooth construction of underground structure, the disturbance and influence of pipe jacking process on the surrounding environment cannot be ignored, in the urban core area, the pipe jacking often faces the risk of passing under roads and buildings and the like, and the requirement for ground surface settlement is extremely high, therefore, the selection and preparation of thixotropic mud is particularly important.

[0003] At present, in the traditional pipe jacking construction process, thixotropic mud is injected, the thixotropy of the thixotropic mud is used to achieve the effect of reducing resistance and supporting soil, after the construction is completed, cement slurry or double-liquid slurry is injected from the pipe joint grouting port to displace the original thixotropic mud, the actual construction condition shows that the displacement mud operation will inevitably cause disturbance to the surrounding soil, which is not conducive to the consolidation settlement in the later period. Therefore, in order to solve the above-mentioned disturbance problem of soil, it is necessary to prepare a pipe jacking thixotropic mud capable of curing in situ and a grouting system. SUMMARY

[0004] In view of the above-mentioned defects, the technical problem solved by the present application is to provide a pipe jacking thixotropic mud capable of curing in situ and a grouting system, so as to solve the problem that the thixotropic mud needs to be replaced after the pipe jacking construction is completed, which causes great disturbance to soil.

[0005] The present application provides a pipe jacking thixotropic mud capable of curing in situ, which comprises a mud body and a curing slurry, the mud body comprises the following components in mass fraction: bentonite 79-81 parts, thickening stabilizer 1-2 parts, dispersing agent 2-3 parts, additive 1-2 parts and xanthan gum 9-11 parts; the curing slurry comprises the following components in mass fraction: high-calcium fly ash 86-88 parts, cement 9-11 parts and gypsum 2-4 parts.

[0006] Preferably, the thickening stabilizer is sodium carboxymethyl cellulose; the dispersing agent is soda ash; and the additive is anionic polyacrylamide.

[0007] Preferably, the ratio of the components in the mud body is as follows: bentonite: thickening stabilizer: dispersing agent: additive: xanthan gum = 80: 1: 3: 1.5: 10.

[0008] Preferably, the ratio of the components in the curing slurry is as follows: high-calcium fly ash: cement: gypsum = 87: 10: 3.

[0009] The application also provides a grouting system of an in-situ solidifiable pipe jacking thixotropic mud, which applies the in-situ solidifiable pipe jacking thixotropic mud according to any one of the above.

[0010] A first preparation machine is configured to prepare the mud body.

[0011] A second preparation machine is configured to prepare the solidified slurry, and has the same structure as the first preparation machine.

[0012] A driving pump is provided with two driving units, and is connected to the first preparation machine and the second preparation machine respectively, and is configured to drive the mud body and / or the solidified slurry to move.

[0013] A controller is electrically connected to the driving pump, the first preparation machine and the second preparation machine.

[0014] A grouting pipe is abutted to the pipe, and is detachably connected to the driving pump through a conversion assembly at one end, and the grouting pipe moves synchronously with the pipe and extends into the soil.

[0015] Preferably, the grouting pipe comprises a plurality of grouting units which are detachably connected to each other in a head-to-tail manner, and the grouting unit comprises:

[0016] An outer pipe body is abutted to the pipe, and the outer pipe body at the end away from the driving pump is fixedly connected to the pipe, and the outer pipe body extends into the soil.

[0017] An inner pipe body has the same structure as the outer pipe body, and the outer diameter of the inner pipe body is smaller than the inner diameter of the outer pipe body, and the inner pipe body is connected to the inner pipe body in the adjacent grouting unit through the outer pipe body.

[0018] A support frame is connected to the outer pipe body and the inner pipe body, and a plurality of support frames are arranged along the arrangement direction of the outer pipe body, and are configured to support the inner pipe body.

[0019] A first control valve is electrically connected to the controller, and is connected to the outer pipe body and the inner pipe body, and is configured to control the on-off of the outer pipe body.

[0020] A second control valve is electrically connected to the controller, and is connected to the inner pipe body, and is configured to control the on-off of the inner pipe body, and the first control valve and the second control valve are both provided with two units, and are arranged at positions close to the two ends of the inner pipe body.

[0021] Preferably, the outer pipe body comprises:

[0022] A first connecting head is connected to the first control valve at one end, and is provided with a first inclined surface at the other end.

[0023] The second connecting head has one end connected with the first control valve and the other end provided with a second inclined surface. A clamping table abutting against the first connecting head is arranged on the second connecting head. An outer diameter of the second connecting head away from the clamping table is equal to an inner diameter of the first connecting head.

[0024] The connecting part has one end integrally formed with the first connecting head away from the first inclined surface and the other end integrally formed with the second connecting head away from the second inclined surface.

[0025] The first electromagnet is connected with the first connecting head and arranged on the first connecting head. The first electromagnet is electrically connected with the controller.

[0026] The second electromagnet is connected with the second connecting head and arranged on the second connecting head. The second electromagnet is electrically connected with the first electromagnet and the controller.

[0027] Preferably, the first preparation machine comprises:

[0028] The first storage tank is provided with a plurality of first storage cavities. The plurality of first storage cavities are respectively used for storing raw materials for preparing the mud body.

[0029] The first mixing tank is connected with the first storage tank and communicates with the first storage tank through a third control valve. The third control valve corresponds to the first storage cavities one by one. The first mixing tank comprises a material guiding cavity and a stirring cavity. The material guiding cavity simultaneously communicates with the plurality of first storage cavities. The material guiding cavity has a reverse circular table structure. The stirring cavity communicates with the material guiding cavity. The stirring cavity is provided with a stirring member.

[0030] The first liquid storage tank is connected with the first mixing tank and communicates with the first mixing tank through the fourth control valve. The first liquid storage tank is connected with the driving pump through a first connecting pipe. The first liquid storage tank is provided with a liquid level detector for detecting a liquid level.

[0031] Preferably, the conversion assembly comprises:

[0032] The conversion pipe is detachably connected with the grouting pipe. The two ends of the conversion pipe have the same structure as the first connecting head or the second connecting head.

[0033] The interface connecting pipe is detachably connected with the conversion pipe or the first connecting head or the second connecting head. One end of the interface connecting pipe has the same structure as the second connecting head or the first connecting head.

[0034] The first shunt pipe has one end connected with the other end of the interface connecting pipe and the other end connected with the driving pump.

[0035] A second shunt pipe is connected with the other end of the interface connecting pipe, one end of the second shunt pipe is arranged in the first shunt pipe, and the other end of the second shunt pipe is connected with the other driving pump through the first shunt pipe.

[0036] Preferably, a driving box connected with the first preparation machine and the second preparation machine simultaneously is further included, the driving box is provided with a control cavity for accommodating the controller and a driving cavity for accommodating the driving pump, and the conversion assembly is arranged through the driving box.

[0037] From the above scheme, the mud main body in the in-situ solidifiable pipe jacking thixotropic mud provided by the application is used for large-section pipe jacking construction, and the solidified slurry is used for solidifying the mud main body that has been injected after construction is completed, so that the soil body is supported and the soil body is not disturbed in the case of good construction completion. The application further provides a grouting system of the in-situ solidifiable pipe jacking thixotropic mud, which solves the problem that the thixotropic mud needs to be replaced after pipe jacking construction is completed and the soil body is greatly disturbed, has remarkable effect, and is suitable for wide promotion. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0039] Figure 1 A settlement duration curve diagram of a test section and a normal solidification section of the in-situ solidifiable pipe jacking thixotropic mud provided by the application;

[0040] Figure 2 A final settlement cross section diagram of the test section and the normal solidification section of the in-situ solidifiable pipe jacking thixotropic mud provided by the application;

[0041] Figure 3 A structure schematic diagram of a guide member in the grouting system of the in-situ solidifiable pipe jacking thixotropic mud provided by the application;

[0042] Figure 4 A structure schematic diagram of the grouting system of the in-situ solidifiable pipe jacking thixotropic mud provided by the application;

[0043] Figure 5 A structure schematic diagram of the grouting system of the in-situ solidifiable pipe jacking thixotropic mud provided by the application; Figure 4 A sectional structure diagram along the A-A line in the grouting system of the in-situ solidifiable pipe jacking thixotropic mud provided by the application;

[0044] Figure 6A sectional view structure schematic diagram of the first preparation machine, the second preparation machine and the drive box in the in-situ solidified pipe jacking thixotropic mud grouting system provided by the application;

[0045] Figure 7 A sectional view structure schematic diagram of the first preparation machine and the drive box in the in-situ solidified pipe jacking thixotropic mud grouting system provided by the application;

[0046] Figure 8 A sectional view structure schematic diagram of the grouting monomer in the in-situ solidified pipe jacking thixotropic mud grouting system provided by the application;

[0047] Figure 9 For Figure 5 An enlarged structure schematic diagram of B in the figure;

[0048] Figure 10 For Figure 5 An enlarged structure schematic diagram of C in the figure.

[0049] In the figure:

[0050] 1, the first preparation machine; 2, the second preparation machine; 3, the drive pump; 4, the controller; 5, the grouting monomer; 6, the pipe jacking; 7, the conversion assembly; 8, the drive box; 9, the propeller; 10, the guide; 11, the first storage tank; 12, the first mixing box; 13, the first liquid storage tank; 14, the sealing plug; 15, the stirring part; 51, the outer pipe body; 52, the inner pipe body; 53, the support frame; 54, the first control valve; 55, the second control valve; 71, the conversion pipe; 72, the interface connecting pipe; 73, the first shunt pipe; 74, the second shunt pipe; 101, the first guide hole; 102, the second guide hole; 103, the guide rail; 111, the first storage cavity; 511, the first connecting head; 512, the second connecting head; 513, the connecting part; 514, the first electromagnet; 515, the second electromagnet. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the application will be apparently and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0052] Please refer to Figures 1-2A specific embodiment of the in-situ solidifiable pipe jacking thixotropic mud provided by the present application is described. The in-situ solidifiable pipe jacking thixotropic mud comprises a mud body and a solidification slurry, the mud body comprises the following components in mass fraction: bentonite 79-81 parts, thickening stabilizer 1-2 parts, dispersant 2-3 parts, additive 1-2 parts and xanthan gum 9-11 parts; the solidification slurry comprises the following components in mass fraction: high-calcium fly ash 86-88 parts, cement 9-11 parts and gypsum 2-4 parts.

[0053] In the embodiment, the thickening stabilizer is sodium carboxymethyl cellulose (CMC); the dispersant is soda ash; and the additive is anionic polyacrylamide (PHP). The sodium carboxymethyl cellulose (CMC) aqueous solution has viscosity and is the most important ionic cellulose glue. The main functions of the sodium carboxymethyl cellulose (CMC) in the mud are thickening agent and stabilizer. In the filter press test, the mud cake formed by the mud with the CMC formula is generally thick and hard, and the effect of reducing the mud loss is obvious. Meanwhile, the sodium element in the sodium carboxymethyl cellulose (CMC) helps the combination of bentonite and water.

[0054] The chemical formula of the soda ash is Na2CO3. The soda ash is easily soluble in water, and the main function of the soda ash in the mud ratio process is dispersant. The sodium ions in the soda ash exchange with the calcium ions in the bentonite to produce a hydration reaction, which can promote the combination ability of the solid phase and the liquid phase in the mud and increase the stability of the mud configuration. Meanwhile, the two kinds of slurry can be more uniformly fused when the subsequent solidification slurry is injected into the pipe-soil gap, and the solidification is more complete.

[0055] The anionic polyacrylamide (PHP) is a long-chain molecular substance with high viscosity and great viscosity. The movement resistance of the polyacrylamide molecule in the solution is very large. The viscosity is the essence of reflecting the size of the internal friction of the solution. Therefore, the larger the molecular weight, the greater the movement resistance in the solution, and the more viscous it is. Due to the hydrophilic group (—CONH2) in the chemical structure of the polyacrylamide, the polyacrylamide has a strong adsorption effect. In addition, the organic connection between the molecules can easily occur to build a network structure, so the polyacrylamide can easily increase the viscosity of the mud and enhance the stability of the mud (water separation rate).

[0056] As an environmentally friendly biological macromolecular material, xanthan gum has also received more and more attention in the field of civil engineering. It is found through experiments that the mechanical properties of the swelling clay treated by xanthan gum are obviously higher than those of the untreated clay, and the xanthan gum has a significant reinforcement effect on the soil.

[0057] Compared with the prior art, the mud main body in the in-situ solidifiable pipe jacking thixotropic mud is used for large-section pipe jacking construction, and the solidification slurry is used for solidifying the injected mud main body after the construction is completed, so that the soil body is supported and is not disturbed in the case of good completion of the construction, and the problem that the traditional thixotropic mud needs to be replaced after pipe jacking construction is completed and disturbs the soil body is solved.

[0058] As another embodiment of the present application, the structure of the in-situ solidifiable pipe jacking thixotropic mud is basically the same as that in the above embodiment, and the difference lies in that the ratio of the components in the mud main body is: bentonite: thickening stabilizer: dispersant: additive: xanthan gum = 80: 1: 3: 1.5: 10. The measured mud performance index is dynamic viscosity 73.25 s, loss amount 16.4 ml / 30 min, and stability (water separation rate) 0. The ratio of the components in the solidification slurry is: high-calcium fly ash: cement: gypsum = 87: 10: 3. The high-calcium fly ash is fly ash obtained by burning lignite, and the composition contains silicon dioxide, aluminum oxide and more than 10% of calcium oxide, has a certain water hardness, and has an apparent density significantly smaller than that of cement, a good particle shape, can be filled more densely in the solidified slurry, and can also make the cement more uniformly dispersed and the hydration reaction more sufficient after being mixed together with the cement.

[0059] The content of the high-calcium fly ash is the largest in the solidification slurry, slows down the hydration and solidification, and the gypsum has a retarding effect. After the solidification slurry enters the outside of the pipe wall and is mixed with the mud main body, the solidification time is slowed down, and the solidification is more sufficient. For example, in the pipe jacking section, a 10m range is selected as a test section, and no solidification grouting is performed. The comparison results of Figure 1 and Figure 2 show that the use of solidification grouting can significantly slow down the settlement.

[0060] Please refer to Figures 1-10, now a specific embodiment of the in-situ solidifiable pipe jacking thixotropic mud grouting system provided by the application is described. The in-situ solidifiable pipe jacking thixotropic mud grouting system applies the in-situ solidifiable pipe jacking thixotropic mud provided by any of the above embodiments, and comprises a first preparation machine 1, a second preparation machine 2, a driving pump 3, a controller 4, and a grouting pipe. The first preparation machine 1 is used to prepare the mud main body. The second preparation machine 2 has the same structure as the first preparation machine 1 and is used to prepare the solidification slurry. The driving pump 3 is provided with two driving pumps and is connected with the first preparation machine 1 and the second preparation machine 2 respectively, and is used to drive the mud main body or / and the solidification slurry to move. The controller 4 is electrically connected with the driving pump 3, the first preparation machine 1 and the second preparation machine 2. The grouting pipe is abutted with the pipe 6, and one end of the grouting pipe is detachably connected with the driving pump 3 through a conversion assembly 7. The grouting pipe moves synchronously with the pipe 6 and extends into the soil, and is used to inject the slurry into the soil.

[0061] In the embodiment, a plurality of grouting holes are arranged on the grouting pipe, and the grouting holes are used to inject the mud main body into the soil. In use, the first preparation machine 1 first prepares the mud main body, and injects the mud main body into the soil in the process of pushing the pipe 6. After the pipe 6 is installed in place, the second preparation machine 2 prepares the solidification slurry, and the grouting pipe is pulled out of the soil. In the process of pulling out, the solidification slurry is first injected to solidify the mud main body which has been injected, and then the mud main body and the solidification slurry are simultaneously injected to fill the gap in the pulling-out stroke.

[0062] Compared with the prior art, the in-situ solidifiable pipe jacking thixotropic mud grouting system can supplement the slurry on the outer surface of the pipe 6 in time by synchronously moving the grouting pipe with the pipe 6, and facilitates the construction of the pipe 6. The mud main body in the entire construction section is solidified by simultaneously preparing and injecting the solidification slurry when the grouting pipe is pulled out, thereby solving the problem that the mud main body needs to be replaced after the construction of the pipe 6 is completed, which greatly disturbs the soil.

[0063] As another embodiment of the present application, the structure of the in-situ solidifiable pipe jacking thixotropic slurry grouting system is basically the same as that of the above embodiment, and the difference is that the grouting pipe comprises a plurality of grouting monomers 5 which are detachably connected with each other in a head-to-tail manner, and the grouting monomer 5 comprises an outer pipe body 51, an inner pipe body 52, a support frame 53, a first control valve 54, and a second control valve 55. The outer pipe body 51 abuts against the pipe 6, and the outer pipe body 51 in the grouting monomer 5 away from the driving pump 3 is fixedly connected with the pipe 6 and extends into the soil body. The inner pipe body 52 has the same structure as the outer pipe body 51, and the outer diameter of the inner pipe body 52 is smaller than the inner diameter of the outer pipe body 51. The inner pipe body 52 penetrates the outer pipe body 51 and is connected with the inner pipe body 52 in the adjacent grouting monomer 5. The support frame 53 is connected with the outer pipe body 51 and the inner pipe body 52, and a plurality of support frames 53 are arranged along the arrangement direction of the outer pipe body 51 to support the inner pipe body 52. The first control valve 54 is electrically connected with the controller 4 and is connected with the outer pipe body 51 and the inner pipe body 52 to control the on-off of the outer pipe body 51. The second control valve 55 is electrically connected with the controller 4 and is connected with the inner pipe body 52 to control the on-off of the inner pipe body 52. The first control valve 54 and the second control valve 55 are both provided with two valves which are arranged at the positions close to the two ends of the inner pipe body 52.

[0064] In the embodiment, the grouting hole is arranged on the outer pipe body 51. The support frame 53 can be a plurality of rod-shaped structures arranged along the circumference of the inner pipe body 52, and the slurry body can still pass through between the adjacent support frames 53. The first control valve 54 and the second control valve 55 are both prior art, and as long as they can realize the above-mentioned functions, they are within the protection scope of the present application.

[0065] As another embodiment of the application, the structure of the in-situ solidifiable pipe jacking thixotropic slurry injection system is basically the same as that in the above embodiment, and the difference is that the outer pipe body 51 comprises a first connecting head 511, a second connecting head 512, a connecting part 513, a first electromagnet 514 and a second electromagnet 515, wherein one end of the first connecting head 511 is connected with the first control valve 54, and the other end is provided with a first inclined surface; one end of the second connecting head 512 is connected with the first control valve 54, and the other end is provided with a second inclined surface, and the second connecting head 512 is provided with a clamping table abutting against the first connecting head 511, and the outer diameter of the second connecting head 512 away from the first control valve 54 side of the clamping table is equal to the inner diameter of the first connecting head 511; one end of the connecting part 513 is integrally formed with the end of the first connecting head 511 away from the first inclined surface, and the other end is integrally formed with the end of the second connecting head 512 away from the second inclined surface; the first electromagnet 514 is connected with the first connecting head 511 and arranged on the inner wall of the first connecting head 511, and the first electromagnet 514 is electrically connected with the controller 4; the second electromagnet 515 is connected with the second connecting head 512 and arranged on the outer wall of the second connecting head 512, and the second electromagnet 515 is electrically connected with the first electromagnet 514 and the controller 4.

[0066] In this embodiment, the structure of the second connecting head 512 is adapted to the first connecting head 511, and the two can be connected by clamping, and after connection, the first electromagnet 514 and the second electromagnet 515 are started by the controller 4, the first electromagnet 514 and the second electromagnet 515 are attracted to each other, and the fixation of the two adjacent injection monomers 5 is realized; during the process of extracting the injection monomer 5, the first electromagnet 514 and the second electromagnet 515 are closed, so that the two adjacent injection monomers 5 can be separated, and the structure is convenient for disassembly and reuse, and also convenient for storage and transportation. When the injection pipe is extracted, the first electromagnet 514 and the second electromagnet 515 at the middle position can be disconnected first, and then the injection pipe is continuously extracted from both sides while pouring the solidified slurry. The arrangement of the first inclined surface and the second inclined surface can make the injection pipe more fluent during movement, and can also expand the injection and diffusion area during the injection process, avoid the generation of gaps during the extraction process, and have better construction effect and better supporting effect.

[0067] As another embodiment of the present application, the structure of the in-situ solidifiable pipe jacking thixotropic slurry grouting system is basically the same as that in the above embodiment, and the difference is that the first preparation machine 1 comprises a first storage tank 11, a first mixing tank 12, and a first liquid storage tank 13, wherein the first storage tank 11 is provided with a plurality of first storage cavities 111, the plurality of first storage cavities 111 are respectively used for storing raw materials for preparing the slurry body, the first storage tank 11 is provided with a feeding port, the feeding port is connected with a sealing plug 14, and the feeding port and the sealing plug 14 are in one-to-one correspondence with the first storage cavities 111; the first mixing tank 12 is connected with the first storage tank 11 and communicates with the first storage tank 11 through a third control valve, the third control valve is in one-to-one correspondence with the first storage cavities 111, the first mixing tank 12 comprises a material guiding cavity and a stirring cavity, the material guiding cavity simultaneously communicates with the plurality of first storage cavities 111, the material guiding cavity has a reverse circular table structure, the stirring cavity communicates with the material guiding cavity, and a stirring piece 15 is arranged in the stirring cavity; the first liquid storage tank 13 is connected with the first mixing tank 12 and communicates with the first mixing tank 12 through a fourth control valve, and the first liquid storage tank 13 is connected with the driving pump 3 through a first connecting pipe.

[0068] In the embodiment, the sealing plug 14 is provided with a detector for measuring the content of the material in the first storage cavity 111, and the first liquid storage tank 13 is provided with a liquid level detector for detecting the liquid level. The structure of the material guiding cavity can better leak the material into the stirring cavity. The stirring piece 15 is a prior art, and will not be described in detail here.

[0069] As another embodiment of the present application, the structure of the in-situ solidifiable pipe jacking thixotropic slurry grouting system is basically the same as that in the above embodiment, and the difference is that the conversion assembly 7 comprises a conversion pipe 71, an interface connecting pipe 72, a first shunt pipe 73, and a second shunt pipe 74, wherein the conversion pipe 71 is detachably connected with the grouting pipe, the two ends of the conversion pipe 71 have the same structure as the first connecting head 511 or the second connecting head 512; the interface connecting pipe 72 is detachably connected with the conversion pipe 71 or the first connecting head 511 or the second connecting head 512, one end of the interface connecting pipe 72 has the same structure as the second connecting head 512 or the first connecting head 511; one end of the first shunt pipe 73 is connected with the other end of the interface connecting pipe 72, and the other end is connected with the driving pump 3; the second shunt pipe 74 is connected with the other end of the interface connecting pipe 72, one end of the second shunt pipe 74 is arranged in the first shunt pipe 73, and the other end penetrates through the first shunt pipe 73 and is connected with the other driving pump 3.

[0070] In the embodiment, the two ends of the conversion pipe 71 are the same as the structure of the first connector 511, and the structure of the end of the interface connecting pipe 72 away from the driving pump 3 is the same as the structure of the second connector 512. In use, the conversion pipe 71 is connected to the second connector 512 of the grouting pipe, and then the interface connecting pipe 72 is connected to the conversion pipe 71, and grouting can be performed. When the grouting pipe is pulled out, one side can be pulled out, and the connection structure does not change. Both sides can be pulled out, and the connection structure of one side does not change. The other side of the grouting pipe, i.e. the end of the first connector 511, is directly connected to the interface connecting pipe 72, and grouting operation is performed.

[0071] As another embodiment of the present application, the structure of the grouting system of the in-situ solidifiable pipe thixotropic mud is basically the same as that in the above embodiment, and the difference is that the device further comprises a driving box 8 connected to the first preparation machine 1 and the second preparation machine 2, the driving box 8 is provided with a control cavity for accommodating the controller 4 and a driving cavity for accommodating the driving pump 3, and the conversion assembly 7 penetrates the driving box 8; the driving box 8 is provided with an operation display electrically connected to the controller 4.

[0072] In the embodiment, the device further comprises a guide 10 connected to a guide rail 103, the guide 10 is provided with a first guide hole 101 matched with the grouting pipe and a second guide hole 102 matched with the pipe 6, the guide rail 103 is fixed to the bottom of the well and used to guide the movement direction of the pipe 6, the pipe 6 is pushed into the soil along the guide rail 103 under the pushing of the pusher 9, the guide 10 is provided with a plurality of guide rails 103, the pipe 6 and the grouting pipe penetrate the guide 10, the grouting pipe is provided with a plurality of guide rails 103 around the pipe 6, and the first guide hole 101 corresponds to the grouting pipe one by one. It should be understood that the terms "inner", "outer" and the like indicate the position or location relationship based on the position or location relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0073] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other. The contents not described in detail in the embodiments of the present application belong to the prior art known to those skilled in the art.

[0074] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A grouting system for in-situ curable pipe jacking thixotropic mortar, characterized in that, The utility model relates to a kind of slurry injection pipe and slurry injection device, including: First preparation machine (1) is used to prepare mud main body; Second preparation machine (2) is identical with the structure of the first preparation machine (1), used to prepare solidified slurry; Drive pump (3) is provided with two, and is respectively connected with the first preparation machine (1) and the second preparation machine (2), for driving the mud main body or / and the solidified slurry movement; Controller (4) is electrically connected with the drive pump (3), the first preparation machine (1) and the second preparation machine (2) simultaneously; Slurry injection pipe is abutted with top pipe (6), and one end is detachably connected with the drive pump (3) through conversion component (7), and the slurry injection pipe moves synchronously with the top pipe (6), and extends into soil body; The slurry injection pipe includes a plurality of slurry injection monomers (5) detachably connected between the first end and the tail, and the slurry injection monomer (5) includes: Outer pipe body (51) is abutted with the top pipe (6), and the outer pipe body (51) in the slurry injection monomer (5) away from the drive pump (3) one end is fixedly connected with the top pipe (6), and the outer pipe body (51) extends into soil body; Inner pipe body (52) is identical with the structure of the outer pipe body (51), and the outer diameter of the inner pipe body (52) is less than the inner diameter of the outer pipe body (51), and the inner pipe body (52) is connected with the inner pipe body (52) in adjacent slurry injection monomer (5) through the outer pipe body (51); Support frame (53) is connected with the outer pipe body (51) and the inner pipe body (52) simultaneously, and a plurality of support frames (53) are provided along the setting direction of the outer pipe body (51) for supporting the inner pipe body (52); First control valve (54) is electrically connected with the controller (4) and connected with the outer pipe body (51) and the inner pipe body (52) simultaneously, for controlling the on-off of the outer pipe body (51); Second control valve (55) is electrically connected with the controller (4) and connected with the inner pipe body (52), for controlling the on-off of the inner pipe body (52), and the first control valve (54) and the second control valve (55) are both provided with two, and are respectively arranged at the positions close to the two ends of the inner pipe body (52); The outer pipe body (51) includes: First connecting head (511) is connected with the first control valve (54) at one end, and is provided with first inclined plane at the other end; Second connecting head (512) is connected with the first control valve (54) at one end, and is provided with second inclined plane at the other end, and the second connecting head (512) is provided with clamping table abutted with the first connecting head (511), and the outer diameter of the second connecting head (512) away from the first control valve (54) side is equal to the inner diameter of the first connecting head (511); Connecting part (513) is integrally formed with the first connecting head (511) away from the first end of the first inclined plane at one end, and is integrally formed with the second connecting head (512) away from the second end of the second inclined plane at the other end. A first electromagnet (514) is connected with and arranged on the first connector (511), and the first electromagnet (514) is electrically connected with the controller (4); A second electromagnet (515) is connected with and arranged on the second connector (512), and the second electromagnet (515) is electrically connected with the first electromagnet (514) and the controller (4) at the same time; The conversion assembly (7) comprises: A conversion pipe (71) is detachably connected with the grouting pipe, and two ends of the conversion pipe (71) are identical in structure to the first connector (511) or the second connector (512); An interface connecting pipe (72) is detachably connected with the conversion pipe (71) or the first connector (511) or the second connector (512), and one end of the interface connecting pipe (72) is identical in structure to the second connector (512) or the first connector (511); A first shunt pipe (73) is connected at one end with the other end of the interface connecting pipe (72) and at the other end with the drive pump (3); A second shunt pipe (74) is connected with the other end of the interface connecting pipe (72), one end of the second shunt pipe (74) is arranged in the first shunt pipe (73), and the other end of the second shunt pipe (74) penetrates through the first shunt pipe (73) and is connected with another drive pump (3).

2. A grouting system for a thixotropic mortar for pipe jacking that can be cured in situ according to claim 1, characterized in that, The first preparation machine (1) comprises: A first storage tank (11) is provided with a plurality of first storage cavities (111), and the plurality of first storage cavities (111) are respectively used for storing raw materials for preparing the mud body; A first mixing tank (12) is connected with the first storage tank (11) and communicates with the first storage tank (11) through a third control valve, the third control valve corresponds to the first storage cavities (111) one by one, the first mixing tank (12) comprises a material guiding cavity and a stirring cavity, the material guiding cavity simultaneously communicates with the plurality of first storage cavities (111), the material guiding cavity is a reverse circular table structure, the stirring cavity communicates with the material guiding cavity, and the stirring cavity is provided with a stirring piece (15); A first liquid storage tank (13) is connected with the first mixing tank (12) and communicates with the first mixing tank (12) through a fourth control valve, the first liquid storage tank (13) is connected with the drive pump (3) through a first connecting pipe, and the first liquid storage tank (13) is provided with a liquid level detector for detecting a liquid level.

3. A grouting system for a thixotropic mortar for pipe jacking that can be cured in situ according to claim 2, characterized in that, Further comprising a drive box (8) connected with the first preparation machine (1) and the second preparation machine (2) at the same time, the drive box (8) is provided with a control cavity for accommodating the controller (4) and a drive cavity for accommodating the drive pump (3), and the conversion assembly (7) penetrates through the drive box (8) and is arranged.

4. A grouting system for a thixotropic mortar for pipe jacking that can be cured in situ according to claim 3, characterized in that, The mud body comprises the following components in mass fraction: bentonite 79-81 parts, thickening stabilizer 1-2 parts, dispersant 2-3 parts, additive 1-2 parts and xanthan gum 9-11 parts; the solidified slurry comprises the following components in mass fraction: high-calcium fly ash 86-88 parts, cement 9-11 parts and gypsum 2-4 parts; The thickening stabilizer is sodium carboxymethyl cellulose; the dispersant is soda ash; and the additive is anionic polyacrylamide.

5. A grouting system for a thixotropic mortar for pipe jacking curable in situ according to claim 4, characterized in that, The ratio of the components in the mud body is: bentonite: thickening stabilizer: dispersant: additive: xanthan gum = 80:1:3:1.5:

10.

6. A grouting system for a thixotropic mortar for pipe jacking curable in situ according to claim 5, characterized in that, The ratio of the components in the solidified slurry is: high-calcium fly ash: cement: gypsum = 87:10:3.

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