Construction device and method for preventing slurry loss and water leakage in trenchless pipe shell forming

Abstract

The application discloses a construction device and method for preventing slurry loss and water penetration in trenchless pipe outside shell forming, which comprises a pipe jacking machine and a plurality of pipe sections connected with the pipe jacking machine, and a mold section arranged between the pipe jacking machine and the first pipe section; the mold section comprises an inner mold and an outer mold which are sleeved together, the inner mold and the outer mold are closed and connected at the front end of the mold section, and a first pouring cavity for pouring a shell is formed between the inner mold and the outer mold; a second pouring cavity is formed between the shell and the outer edge of the pipe section; a plurality of first grouting holes which are communicated with the first pouring cavity are arranged on the inner mold, the plurality of first grouting holes are connected with extrusion grouting equipment, a plurality of second grouting holes which are communicated with the second pouring cavity are arranged on each pipe section, and the plurality of second grouting holes are connected with grouting equipment. In the jacking process, a closed ring shell is formed along the outer side of the pipeline, the slurry is injected between the shell and the pipeline, the direct contact between the slurry and the soil is broken through the shell, the slurry loss is prevented, the groundwater penetration is prevented, no pollution is caused, and long-distance jacking can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipeline construction, in particular to a construction device and method for preventing slurry loss and water leakage in non-excavation pipe shell formation. BACKGROUND

[0002] In traditional non-excavation construction, in order to minimize the impact on surrounding buildings, pipe jacking, shield, directional pipe pulling and other processes are generally used. During the construction process, a large amount of lubricating slurry or cement slurry is usually injected between the outer edge of the pipe section and the gap between the excavated soil to achieve the purpose of reducing resistance and reinforcement. Since the injected lubricating slurry or cement slurry directly contacts the soil outside the pipe, a large amount of slurry will be lost when the soil porosity is large, the construction cost will also increase, and serious environmental pollution will be caused. At the same time, groundwater will also flow into the pipe through the joints of the pipe section or pipe segment, resulting in poor waterproof effect. Therefore, there is an urgent need for a construction device and method for preventing slurry loss and water leakage in non-excavation pipe shell formation. SUMMARY

[0003] In view of the deficiencies in the prior art, the present application provides a construction device and method for preventing slurry loss and water leakage in non-excavation pipe shell formation.

[0004] The present application discloses a construction device for preventing slurry loss and water leakage in non-excavation pipe shell formation, comprising a pipe jacking machine, one end of the pipe jacking machine is provided with a cutter head, the other end is connected with multiple pipe sections, and a mold section is arranged between the pipe jacking machine and the first pipe section adjacent to the pipe jacking machine.

[0005] The mold section comprises an outer mold and an inner mold which are sleeved together, the outer mold and the inner mold are closed and connected at one end of the mold section by a first baffle, and a first pouring cavity for pouring a protective shell is formed between the outer mold and the inner mold; the poured protective shell and the outer edge of the pipe section are spaced apart to form a second pouring cavity;

[0006] A plurality of first grouting holes are arranged on the inner mold and communicated with the first pouring cavity, the first grouting holes are connected with an extrusion injection device through a grouting pipeline, and a plurality of second grouting holes are arranged on each pipe section and communicated with the second pouring cavity, the second grouting holes are connected with a grouting device through a grouting pipeline.

[0007] As a further improvement of the present application, the outer contour of the mold section is adapted to the outer contour of the pipe jacking pipe section or the pipe section to be laid, and the length of the mold section is 1-3m.

[0008] As a further improvement of the present application, the mold section further comprises a second baffle and a plurality of reinforcing ribs.

[0009] A plurality of said reinforcing bars are laid on the inner side of said inner mold along the advancing direction of said mold segment, one end of a plurality of said reinforcing bars abuts on the inner wall surface of said first baffle and is fixedly connected with said first baffle, and the other end of a plurality of said reinforcing bars is fixedly connected with the inner wall surface of the second baffle after extending out of said inner mold by a distance;

[0010] The middle part of said first baffle and said second baffle is provided with a through hole for the equipment or personnel to pass through, and the advancing end of the first pipe segment abuts on the outer wall surface of said second baffle.

[0011] As a further improvement of the present application, a plurality of said reinforcing bars include, but are not limited to, I-shaped steel.

[0012] As a further improvement of the present application, a plurality of said electric heating wires are laid on the inner side of said inner mold, and said electric heating wires are used to heat said inner mold.

[0013] The outer side of said electric heating wire is covered with a rock wool thermal insulation layer.

[0014] As a further improvement of the present application, the thickness of said protective shell is 3-10mm.

[0015] As a further improvement of the present application, the spacing distance between said protective shell and the outer edge of said pipe segment is 10-30mm.

[0016] As a further improvement of the present application, said squeeze injection equipment is placed inside said mold segment or inside said pipe segment after jacking is completed, and is communicated with said first grouting hole through a plurality of said grouting pipes.

[0017] Said squeeze injection equipment includes, but is not limited to, an extruder or a glue injection machine.

[0018] As a further improvement of the present application, it further includes a pipe jacking equipment placed in the starting work well.

[0019] Said pipe jacking equipment includes a backrest, a plurality of hydraulic cylinders and an equalizing ring, the cylinder barrel end of a plurality of said hydraulic cylinders is fixedly installed on said backrest, and said backrest is tightly attached to the well wall of said starting work well.

[0020] The piston rod end of a plurality of said hydraulic cylinders is connected with said equalizing ring, the outer side of said equalizing ring abuts on the to-be-installed pipe segment and pushes said to-be-installed pipe segment to advance.

[0021] The present application discloses a method for a construction device for preventing slurry loss and water leakage in non-excavation pipe outer shell forming, comprising:

[0022] The pipe jacking machine, the squeeze injection equipment and the mold segment are transported to the to-be-excavated horizontal plane by hoisting equipment.

[0023] The jacking machine is started, and the extension and retraction of the hydraulic cylinders in the starting working well are matched to drive the jacking machine to move the mold segment forward, at this time, the extrusion equipment synchronously pressurizes the chemical agent into the first pouring cavity of the mold segment, and the chemical agent forms a closed protective shell after solidification;

[0024] With the forward movement of the jacking machine, the hoisting equipment hoists the pipe segment to be laid into the starting working well in sequence, the pipe segment is pushed forward by the extension and retraction of the plurality of hydraulic cylinders, and the grouting equipment synchronously pressurizes the lubricating slurry into the second grouting hole of the pipe segment to fill the second pouring cavity between the protective shell and the outer edge of the pipe segment;

[0025] The above steps are repeated to complete the laying and pressurizing of the protective shell, the pipe segment and the lubricating slurry;

[0026] When the jacking machine reaches the receiving working well, the jacking machine, the mold segment and the extrusion equipment are lifted out of the receiving working well by the hoisting equipment, and the laying of the whole pipeline is completed.

[0027] As a further improvement of the present application,

[0028] Compared with the prior art, the present application has the following advantages:

[0029] The present application can form a closed protective shell along the outer side of the pipe segment during the jacking construction process by arranging the mold segment between the jacking machine and the first pipe segment, pressurizing the slurry between the protective shell and the pipe segment through the plurality of second grouting holes, breaking the direct contact between the slurry and the soil through the protective shell, and achieving the internal protection of the slurry loss, the external protection of the groundwater penetration, the non-pollution, and the long-distance jacking, which reduces the construction cost and prolongs the service life of the newly laid pipe segment;

[0030] The protective shell formed in the present application has the advantages of high strength and water resistance. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 The structure diagram of the construction device for preventing slurry loss and water of the non-excavation pipe outer shell is disclosed for an embodiment of the present application;

[0032] Figure 2 The structure connection diagram of the mold segment and the pipe segment structure of the construction device for preventing slurry loss and water of the non-excavation pipe outer shell is disclosed for an embodiment of the present application;

[0033] Figure 3 The structure diagram of the mold segment of the construction device for preventing slurry loss and water of the non-excavation pipe outer shell is disclosed for an embodiment of the present application;

[0034] Figure 4A-A sectional view of the mold segment structure of the construction device for the trenchless pipe shell forming disclosed in an embodiment of the present application;

[0035] Figure 5 A-A sectional view of the mold segment structure of the construction device for the trenchless pipe shell forming disclosed in an embodiment of the present application; Figure 4

[0036] Figure 6 B-B sectional view of the mold segment structure of the construction device for the trenchless pipe shell forming disclosed in an embodiment of the present application; Figure 5

[0037] Figure 7 I part enlarged view of the mold segment structure of the construction device for the trenchless pipe shell forming disclosed in an embodiment of the present application. Figure 6 In the drawings:

[0038]

[0039] 1, pipe jacking machine; 2, extrusion equipment; 3, mold segment; 31, outer mold; 32, inner mold; 33, second baffle; 34, first baffle; 35, reinforcing rib; 4, pipe segment; 5, protective shell; 6, starting shaft; 7, first pouring cavity; 8, second pouring cavity; 9, grouting pipeline. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element 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. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.​​​

[0043] The application will be further described in detail below with reference to the accompanying drawings:

[0044] As Figures 1-2 shown, the application provides a construction device for preventing slurry loss and water in non-excavation pipe outer shell, comprising a pipe jacking machine 1, the pipe jacking machine 1 is provided with a cutter head at one end, the other end is connected with a plurality of pipe sections 4, further comprising a mold section 3 arranged between the pipe jacking machine 1 and the first pipe section 4 adjacent to the pipe jacking machine 1; the mold section 3 comprises an outer mold 31 and an inner mold 32 which are sleeved together, the outer mold 31 and the inner mold 32 are connected by a first baffle 34 at one end of the mold section 3, a first pouring cavity 7 for pouring the protective shell 5 is formed between the outer mold 31 and the inner mold 32; the protective shell 5 after pouring is spaced a certain distance from the outer edge of the pipe section 4 to form a second pouring cavity 8; a plurality of first grouting holes are arranged on the inner mold 32 and communicated with the first pouring cavity 7, the plurality of first grouting holes are connected with the extrusion grouting equipment 2 through a grouting pipeline 9, and a plurality of second grouting holes are arranged on each pipe section 4 and communicated with the second pouring cavity, the plurality of second grouting holes are connected with the grouting equipment through a grouting pipeline 4.

[0045] In the application, the mold section 3 is arranged between the pipe jacking machine 1 and the first pipe section 4, so that a closed ring of protective shells 5 can be formed along the outer side of the pipe section during pipe jacking construction, the slurry is injected between the protective shell 5 and the pipe section 4 through the plurality of second grouting holes, the direct contact between the slurry and the soil is broken through the protective shell 5, the internal slurry loss is prevented, the external groundwater penetration is prevented, the pollution-free body is achieved, the construction cost is reduced, and the service life of the newly laid pipe section 4 is prolonged.

[0046] The protective shell 5 formed in the application has the advantages of high strength and water resistance.

[0047] Specifically:

[0048] As Figures 3-7 shown, the outer contour of the mold section 3 in the application is matched with the outer contour of the pipe jacking pipe section 4 or the pipe section 4 to be laid. The length of the mold section 3 in the application is 1-3m, and in specific construction, the length of the mold section 3 can be determined according to the size of the pipe section and the material characteristics of the protective shell 5, so as to ensure that the protective shell 5 can be formed in the mold section 3 and reach the required strength within the jacking speed range.

[0049] Further, the material of the mold section 3 in the application can be determined according to the material characteristics of the protective shell 5, and can be a metal plate such as a steel plate or an aluminum plate, or a composite plate such as plastic or glass steel.

[0050] Further, the mold segment 3 in the application further comprises a second baffle 33 and a plurality of reinforcing ribs 35; the plurality of reinforcing ribs 35 are laid on the inner side of the inner mold 32 along the advancing direction of the mold segment 3, one end of the plurality of reinforcing ribs 35 abuts against the inner wall surface of the first baffle 34 and is fixedly connected with the first baffle 34, the other end of the plurality of reinforcing ribs 35 extends out of the inner mold 32 by a distance and is fixedly connected with the inner wall surface of the second baffle 33; the middle part of the first baffle 34 and the second baffle 33 are both provided with through holes for the equipment or personnel to pass through, and one end of the advancing first pipe segment 4 abuts against the outer wall surface of the second baffle 33. The fixed connection in the application can be welding connection.

[0051] Further, the inner side of the inner mold 32 in the application is further laid with a plurality of electric heating wires, and the plurality of electric heating wires are used for heating the inner mold 32; the outer side of the electric heating wire is covered with a rock wool heat preservation layer. The plurality of electric heating wires in the application can make the material injected into the first pouring cavity 7 quickly solidify to form a closed ring-shaped high-strength protective shell 5 within a certain space from the outer edge of the pipe segment 4.

[0052] Further, the reinforcing ribs in the application all include but are not limited to I-shaped steel, the plurality of I-shaped steels are uniformly arranged on the inner wall surface of the inner mold 32 of the mold segment 3 along the advancing direction of the mold segment 3 and are fixedly connected with the inner wall surface of the inner mold 32 of the mold segment 3, one end of the plurality of I-shaped steels abuts against the inner wall surface of the first baffle 34 and is fixedly connected with the first baffle 34, the other end of the plurality of reinforcing ribs 35 extends out of the inner mold 32 by a distance and is fixedly connected with the inner wall surface of the second baffle 33. The fixed connection in the application can be welding connection. The reinforcing ribs in the application can also be replaced by square steel or channel steel.

[0053] Further, the thickness of the protective shell 5 in the application is 3-10 mm, and the thickness of the protective shell in the application can be determined comprehensively according to the raw material quality of the protective shell 5 and the material and weight of the jacking pipe segment 4.

[0054] Further, the interval distance between the protective shell 5 and the outer edge of the pipe segment 4 in the application is 10-30 mm.

[0055] Further, the extrusion injection equipment 2 in the application can be placed inside the mold segment 3 (as shown in Figure 3 , Figure 6 ) or inside the jacked pipe segment 4, and is communicated with the first grouting hole through a plurality of grouting pipelines 9; the extrusion injection equipment in the application includes but is not limited to an extruder or a glue injection machine.

[0056] Further, the extrusion injection equipment 2 in the application can also be arranged between the pipe jacking machine 1 and the mold segment 3 (as shown in Figure 1 , Figure 2The first pouring cavity 7 is communicated with the first pouring hole through a plurality of grouting pipes 9; the extrusion equipment in the application includes but is not limited to an extruder or a glue injection machine.

[0057] Further, the chemical agent extruded by the extrusion equipment 2 in the application into the first pouring cavity 7 is resin or other chemical agent with high strength after solidification, such as a resin, a catalyst and a fiber to form a glass steel shell.

[0058] Further, the outer side of the outer mold 31 of the mold segment 3 in the application can be injected with lubricating slurry by the grouting equipment through the grouting pipes to reduce the resistance of the mold segment 3 and improve the lubrication of the mold segment 3.

[0059] Further, the application also includes a pipe jacking equipment arranged in the starting working well 6; the pipe jacking equipment includes a backrest, a plurality of hydraulic cylinders and an equalizing ring, the cylinder barrels of the plurality of hydraulic cylinders are fixedly installed on the backrest, and the backrest is tightly attached to the well wall of the starting working well; the piston rod ends of the plurality of hydraulic cylinders are connected with the equalizing ring, and the outer side of the equalizing ring is in contact with the to-be-installed pipe segment 4 to push the to-be-installed pipe segment 4 to move forward.

[0060] The application provides a method for constructing a construction device for preventing slurry loss and water of a trenchless pipe outer shell, and specifically comprises the following steps.

[0061] 1) Installing the pipe jacking equipment in the starting working well 6 is completed;

[0062] 2) The pipe jacking machine 1, the extrusion equipment 2 and the mold segment 3 are transported to the to-be-excavated horizontal plane by the hoisting equipment;

[0063] 3) The pipe jacking machine 1 is started, and the extension and retraction actions of the plurality of hydraulic cylinders are coordinated to move the pipe jacking machine and the mold segment forward, at this time, the extrusion equipment 2 synchronously extrudes the chemical agent into the first pouring cavity 7 of the mold segment 3, and the chemical agent is heated by the heating wire to quickly solidify to form the closed protective shell 5;

[0064] 4) With the forward movement of the pipe jacking machine 1, the to-be-laid pipe segment 4 is hoisted into the starting working well 6 by the hoisting equipment in sequence, and the pipe segment 4 is pushed forward by the extension and retraction actions of the plurality of hydraulic cylinders to move forward;

[0065] 5) The lubricating slurry is synchronously injected into the second grouting hole of the pipe segment 4 by the grouting equipment to fill the second pouring cavity between the protective shell 5 and the outer edge of the pipe segment 4;

[0066] 6) Steps 3-5 are repeated to complete the laying and extruding of the protective shell 5, the pipe segment 4 and the lubricating slurry;

[0067] 7), when the pipe jacking machine 1 reaches the receiving working well, the pipe jacking machine, the mold segment and the extrusion equipment 3 are lifted away from the receiving working well by the lifting equipment, and the whole pipeline laying work is completed.

[0068] Further, the lifting equipment and the pipe jacking machine 1 in the application are existing designs, which will not be described here.

[0069] Further, the application scope of the construction method in the application includes but is not limited to pipe jacking, shield, pipe pulling and other processes. When used for directional drilling pipe pulling construction, only the mold segment 3 needs to be connected at the rear end of the expanded head after the reaming construction is completed, and the forming is completed with the reaming, so as to realize the injection molding of the protective shell 5.

[0070] Further, in the construction method in the application, the outer side of the outer mold 31 of the mold segment 3 can be injected with lubricating slurry through the grouting pipe 9 by the grouting equipment, so as to achieve the effect of reducing the resistance of the mold segment 3 and improve the lubricity of the mold segment 3 in advancing.

[0071] The above is only the preferred embodiment of the application and is not used to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A non-excavation pipe outside shell forming anti-slurry leakage and waterproof construction device, comprising a pipe jacking machine, one end of the pipe jacking machine is provided with a cutter head, and the other end is connected with a plurality of pipe sections, characterized in that, A mold segment is arranged between the jacking machine and the first pipe segment adjacent to the jacking machine; The mold segment comprises an outer mold and an inner mold sleeved together, the outer mold and the inner mold are connected by a first baffle at one end of the mold segment, and a first pouring cavity for pouring a protective shell is formed between the outer mold and the inner mold; the closed annular protective shell after pouring forms a second pouring cavity at a distance from the outer edge of the pipe segment; A plurality of first grouting holes are arranged on the inner mold and communicated with the first pouring cavity, and a plurality of the grouting holes are connected with the extrusion injection equipment through a grouting pipeline; a plurality of second grouting holes are arranged on each pipe segment and communicated with the second pouring cavity, and a plurality of the second grouting holes are connected with the grouting equipment through a grouting pipeline.

2. The construction apparatus of claim 1, wherein The outer contour of the mold segment is matched with the outer contour of the pipe segment or the pipe segment to be laid; The length of the mold segment is 1-3m.

3. The construction apparatus of claim 1, wherein The mold segment further comprises a second baffle and a plurality of reinforcing ribs; The plurality of reinforcing ribs are laid on the inner side of the inner mold in the advancing direction of the mold segment, one end of the plurality of reinforcing ribs abuts against the inner wall surface of the first baffle and is fixedly connected with the first baffle, and the other end of the plurality of reinforcing ribs is fixedly connected with the inner wall surface of the second baffle after extending out of the inner mold by a distance; The middle part of the first baffle and the second baffle is provided with a through hole for the equipment or personnel to pass through, and one end of the advancing pipe segment abuts against the outer wall surface of the second baffle.

4. The construction apparatus of claim 3, wherein The plurality of reinforcing ribs include but are not limited to I-beams.

5. The construction apparatus of claim 1, wherein A plurality of heating wires are laid on the inner side of the inner mold, and the plurality of heating wires are used for heating the inner mold; The outer side of the heating wire is covered with a rock wool thermal insulation layer.

6. The construction apparatus of claim 1, wherein The thickness of the protective shell is 3-10mm.

7. The construction apparatus of claim 1, wherein The distance between the protective shell and the outer edge of the pipe segment is 10-30mm.

8. The construction device according to claim 1, wherein the extrusion injection equipment is arranged inside the mold segment or inside the pipe segment after jacking is completed, and is communicated with the first grouting hole through a plurality of grouting pipelines; The extrusion injection equipment includes but is not limited to an extruder or a glue injection machine.

9. The construction apparatus of claim 1, wherein A jacking device arranged in a starting work well is further included; The jacking device comprises a backrest, a plurality of hydraulic cylinders, and an equalizing ring, the cylinder barrel end of the plurality of hydraulic cylinders is fixedly installed on the backrest, and the backrest is tightly attached to the well wall of the starting work well; the piston rod end of the plurality of hydraulic cylinders is connected with the equalizing ring, the outer side of the equalizing ring abuts against the pipe segment to be installed, and pushes the pipe segment to be installed to advance.

10. A method of constructing a non-excavated, external-cured, slurry- loss- controlled, water- resistant apparatus as claimed in any one of claims 1 to 9, wherein, The jacking machine, the extrusion injection equipment, and the mold segment are transported to the to-be-excavated horizontal plane by hoisting equipment; The jacking machine is started, the extension and retraction actions of the plurality of hydraulic cylinders in the starting work well are coordinated, the jacking machine drives the mold segment to move forward, at this time the extrusion injection equipment synchronously press-injects chemical agents into the first pouring cavity of the mold segment, and the chemical agents form a closed annular protective shell after solidification; ​ With forward movement of the pipe jacking machine, the hoisting device hoists the pipe sections to be laid into the starting shaft in sequence, the pipe sections are pushed forward by the extension and retraction of the plurality of hydraulic cylinders, and the lubricating grout is injected into the second grouting holes of the pipe sections by the grouting device to fill the second pouring cavities between the protective shell and the outer edges of the pipe sections; The above steps are repeated to complete the laying and injection of the protective shell, pipe sections and lubricating grout; When the pipe jacking machine reaches the receiving shaft, the pipe jacking machine, the mold segments and the grouting device are lifted out of the receiving shaft by the hoisting device, and the laying of the entire pipeline is completed.

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