Sectional type grouting pumping system for long-distance pipe jacking construction

Abstract

The utility model discloses a sectional type grouting pumping system for long-distance pipe-jacking construction, which is characterized in that a slurry preparation and storage device is used for preparing slurry required by grouting, an annular grouting body is provided with radial grouting pipes along the circumferential direction, a jacking section pipe is provided with grouting holes for installing the radial grouting pipes, and a pumping device comprises a pump body and a slurry conveying pipeline, the slurry conveying pipeline is connected with the slurry making and storing device, a conveying branch pipe is arranged on the slurry conveying pipeline, the annular grouting body is connected with the slurry conveying branch pipe, the pressure detection part comprises a pressure meter arranged in the annular grouting body, and the automatic control valve is arranged on the slurry conveying branch pipe. According to the sectional type grouting pumping system for long-distance pipe jacking construction, the slurry making and storing device, the pumping device and the grouting device form the sectional type grouting system suitable for long-distance pipe jacking construction, control operation can be conducted in a sectional mode in the construction process, and therefore slurry with appropriate pressure is kept between a jacking pipeline and a soil body.

Description

Technical Field

[0001] This utility model relates to the field of pipe jacking construction technology, and in particular to a segmented grouting pumping system for long-distance pipe jacking construction. Background Technology

[0002] With the advancement of urbanization, surface resources and developable space are becoming increasingly constrained, making the development of underground space an inevitable trend. The problems encountered in urban underground construction are becoming increasingly complex, involving crossing busy city roads, existing railways, and various obstacles, placing increasingly stringent requirements on the surface environment. Currently, the main tunnel construction methods for tunneling under existing structures in China are shield tunneling and pipe jacking. The use of pipe jacking machines for construction is becoming increasingly common. The application of long-distance pipe jacking technology allows for the laying of long-distance municipal underground pipelines such as water supply and drainage pipes without extensive excavation of urban roads or environmental damage.

[0003] Slurry lubrication and friction reduction in long-distance pipe jacking is an extremely important technology. It involves injecting lubricating slurry into the pores around the jacking pipe to form a slurry sleeve. The functions of the slurry sleeve are: firstly, to lubricate, turning the dry friction between the jacking pipe and the soil into wet friction, thus reducing frictional resistance during jacking; and secondly, to fill and support, filling the gaps between the pipe and the soil during construction, and reducing soil deformation and ensuring soil stability under grouting pressure.

[0004] In existing technologies, the traditional method of grout injection is manual grouting. This method has low grouting efficiency, high labor intensity for workers, and often fails to achieve timely and uniform grouting, resulting in high frictional resistance and difficulty in jacking. This is especially true for long-distance pipe jacking, where the grouting process is even more critical. The effectiveness of grouting in reducing friction directly affects the efficiency and even the success or failure of long-distance pipe jacking construction. Traditional manual grouting methods can no longer meet the construction requirements in terms of both construction efficiency and quality control. Utility Model Content

[0005] The purpose of this invention is to provide a segmented grouting pumping system for long-distance pipe jacking construction, so as to solve the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A segmented grouting pumping system for long-distance pipe jacking construction includes a grout preparation and storage device, a pumping device, a grouting device, and a monitoring and control device. The grout preparation and storage device is used to prepare the grout required for grouting. The grouting device includes an annular grouting body disposed within the jacking section, with radial grouting pipes arranged circumferentially along the annular grouting body. The jacking section has grouting holes for installing the radial grouting pipes, and the grouting holes penetrate the pipe wall of the jacking section. The pumping device includes a pump body and a grout delivery pipeline. The grout delivery pipeline is connected to the grout preparation and storage device, and a delivery branch pipe is disposed on the grout delivery pipeline. The annular grouting body is connected to the delivery branch pipe. The monitoring and control device includes an automatic control valve and a pressure detection device. The pressure detection device includes a pressure gauge disposed within the annular grouting body, and the automatic control valve is disposed on the delivery branch pipe.

[0008] The aforementioned segmented grouting pumping system for long-distance pipe jacking construction has multiple grouting holes, which are arranged sequentially at intervals along the circumference of the jacking section.

[0009] The segmented grouting pumping system for long-distance pipe jacking construction described above, from the center of the jacking section to the outer wall, the grouting hole includes a connected radial section, a circumferential connecting section and an inclined section, the length of the radial section being greater than the length of the inclined section.

[0010] In the aforementioned segmented grouting pumping system for long-distance pipe jacking construction, the diameter of the inclined section is larger than the diameter of the radial section.

[0011] The aforementioned segmented grouting pumping system for long-distance pipe jacking construction includes a circumferential connecting section comprising an inlet end connected to the radial section and an outlet end connected to the inclined section. The diameter of the circumferential connecting section gradually increases from the inlet end to the outlet end.

[0012] The aforementioned segmented grouting pumping system for long-distance pipe jacking construction has a filter body transversely installed on the inclined section.

[0013] The segmented grouting pumping system for long-distance pipe jacking construction described above includes an annular grouting body comprising an annular pipe, which is coaxially and fixedly connected to the jacking section.

[0014] In the aforementioned segmented grouting pumping system for long-distance pipe jacking construction, a plurality of radial grouting pipes are provided on the annular pipe, and the ends of the grouting pipes are fixedly installed in the radial section one by one.

[0015] In the above technical solution, the segmented grouting pumping system for long-distance pipe jacking construction provided by this utility model includes a grout preparation and storage device, a pumping device, a grouting device, and a monitoring and control device. The grout preparation and storage device is used to prepare the grout required for grouting. The grouting device includes an annular grouting body and a radial grouting pipe disposed in the jacking section. The jacking section is provided with grouting holes for installing the radial grouting pipe. The pumping device includes a pump body and a grout delivery pipeline. The monitoring and control device includes an automatic control valve and a pressure detection device. Thus, through the grout preparation and storage device, the pumping device, and the grouting device, a grouting system is formed... A segmented grouting system suitable for long-distance pipe jacking construction allows for grouting operations at different locations on the jacking pipe during construction. Grout is injected into the annular gap between the jacking section and the soil through the annular grouting body and radial grouting pipe. When the pressure gauge detects that the pressure in the annular grouting body reaches a preset threshold, the control unit causes the automatic control valve to close the corresponding delivery pipe, stopping the grouting of that section. Each section does not affect the others, thus maintaining a suitable pressure of grout between the jacking pipe and the soil, reducing the jacking resistance of the jacking pipe, and ensuring soil stability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the segmented grouting pumping system for long-distance pipe jacking construction provided in this embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the installation of the grouting device provided in an embodiment of the present utility model;

[0019] Figure 3 Provided for the embodiments of this utility model Figure 2 Enlarged view of point A in the middle.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Pulping and storage device; 2. Pumping device; 21. Pump body; 22. Pulping pipeline; 23. Conveying branch pipe; 3. Grouting device; 31. Annular grouting body; 32. Radial grouting pipe; 4. Monitoring and control device; 41. Automatic control valve; 5. Jacking section pipe; 51. Grouting hole; 52. Radial section; 53. Circumferential connecting section; 54. Inclined section; 55. Filter body. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] like Figure 1-3 As shown, this utility model provides a segmented grouting pumping system for long-distance pipe jacking construction, including a grout preparation and storage device 1, a pumping device 2, a grouting device 3, and a monitoring and control device 4. The grout preparation and storage device 1 is used to prepare the grout required for grouting. The grouting device 3 includes an annular grouting body 31 disposed within the jacking section 5. The annular grouting body 31 is provided with radial grouting pipes 32 arranged circumferentially. The jacking section 5 is provided with grouting holes 51 for installing the radial grouting pipes 32. The grouting holes 51 penetrate... The pumping device 2, which passes through the wall of the top-entry pipe 5, includes a pump body 21 and a grouting pipe 22. The grouting pipe 22 is connected to the grouting and storage device 1. A delivery branch pipe 23 is provided on the grouting pipe 22. The annular grouting body 31 is connected to the grouting branch pipe. The monitoring and control device 4 includes an automatic control valve 41 and a pressure detection element. The pressure detection element is a pressure gauge installed in the annular grouting body 31. The automatic control valve 41 is installed on the grouting branch pipe to control the opening or closing of the annular grouting body 31.

[0024] Specifically, the grout preparation and storage device 1 is installed on the ground and is used to prepare and store the grout required for grouting. This is existing technology and will not be elaborated further. Long-distance pipe jacking construction includes multiple jacking pipe sections 5. During the jacking process, the multiple jacking pipe sections 5 are connected sequentially. Some of the jacking pipe sections 5 are equipped with annular grouting bodies 31. The annular grouting body 31 can be installed in one of every four jacking pipe sections 5, or in one of every three jacking pipe sections 5. The annular grouting body 31 includes an annular steel pipe installed inside the jacking pipe section 5. The annular steel pipe is coaxially arranged with the jacking pipe section 5 and is fixedly connected to the jacking pipe section 5 by welding or other means. Radial grouting pipes 32 are provided on the annular grouting body 31. There are multiple radial grouting pipes 32, which are arranged sequentially at intervals along the circumference of the annular grouting body 31. Grouting holes 51 are provided on the jacking section pipe 5. The grouting holes 51 are arranged one-to-one with the radial grouting pipes 32, and each grouting hole 51 penetrates the pipe wall of the jacking section pipe 5. In this way, during the installation process, each radial grouting pipe 32 is installed one-to-one in the grouting hole 51.

[0025] In this embodiment, the pumping device 2 includes a pump body 21 and a slurry delivery pipe 22. The slurry delivery pipe 22 is laid along the longitudinal axis of the jacking pipe, and the other end of the slurry delivery pipe 22 is connected to the slurry preparation and storage device 1. The pump body 21 provides the power for conveying and lifting the slurry along the slurry delivery pipe 22, the delivery branch pipes 23, and the annular grouting body 31. The number of pump bodies 21 can be set as needed. Several delivery branch pipes 23 are connected to the slurry delivery pipe 22. Each delivery branch pipe 23 corresponds to and is connected to the annular grouting body 31. An automatic control valve 41 is provided on the delivery branch pipe 23, which can open or close the delivery branch pipe 23. Optionally, a manual ball valve can also be provided on the delivery branch pipe 23. The manual ball valve is normally open for easy manual emergency operation.

[0026] In this embodiment, a pressure gauge, which can be a diaphragm pressure gauge, is installed inside the annular grouting body 31. The diaphragm is embedded in the annular delivery pipeline within the grouting body 31, and the sensing diaphragm is in direct contact with the grout to collect pressure data in real time. The collected data is then transmitted to the control unit. Data transmission can be wireless or wired. During construction, the grouting and storage device 1 prepares cement grout according to the grouting process. The pump 21 pumps the grout into the annular grouting body 31 via the delivery pipeline 22 and the delivery branch pipe 23, and then injects it into the outer periphery of the pipe section through the radial grouting pipe 32. The pressure gauge monitors the pressure inside the annular grouting body 31 in real time. When a preset threshold is reached, the control unit causes the automatic control valve 41 to close the corresponding delivery branch pipe 23, stopping the grouting of that section.

[0027] This utility model provides a segmented grouting pumping system for long-distance pipe jacking construction, including a grout preparation and storage device 1, a pumping device 2, a grouting device 3, and a monitoring and control device 4. The grout preparation and storage device 1 is used to prepare the grout required for grouting. The grouting device 3 includes an annular grouting body 31 and a radial grouting pipe 32 disposed within the jacking section 5. The jacking section 5 is provided with grouting holes 51 for installing the radial grouting pipe 32. The pumping device 2 includes a pump body 21 and a grout delivery pipe 22. The monitoring and control device 4 includes an automatic control valve 41 and a pressure detection element. Thus, through the grout preparation and storage device 1, the pumping device 2, and the grouting device 3, the grouting system can be used to grout the pipe. The system 3 forms a segmented grouting system suitable for long-distance pipe jacking construction. During construction, grouting operations can be performed at different locations of the pipe jacking through each grouting device 3. Grouting is injected into the annular gap between the jacking section 5 and the soil through the annular grouting body 31 and the radial grouting pipe 32. When the pressure gauge detects that the pressure inside the annular grouting body 31 reaches the preset threshold, the control unit causes the automatic control valve 41 to close the corresponding delivery pipe 23 and stop the grouting of that section. Each section does not affect each other, thereby maintaining a suitable pressure of grout between the jacking pipe and the soil, reducing the jacking resistance of the jacking pipe, and ensuring soil stability.

[0028] In this embodiment, preferably, there are multiple grouting holes 51, which are arranged sequentially at intervals along the circumference of the jacking section pipe 5. Each grouting hole 51 is arranged along the radial direction of the jacking section pipe 5, and the grouting hole 51 penetrates the side wall of the jacking section pipe 5. Thus, when the radial grouting pipe 32 is installed in the grouting hole 51, the grouting hole 51 and the radial grouting pipe 32 are in a connected state, so that the grout can be pressed from the grouting hole 51 into the annular gap between the jacking section pipe 5 and the soil.

[0029] In this embodiment, preferably, from the center of the jacking pipe 5 towards the outer wall, the grouting hole 51 includes a connected radial section 52, a circumferential connecting section 53, and an inclined section 54, with the length of the radial section 52 being greater than the length of the inclined section 54. Thus, along a cross-section perpendicular to the axis of the jacking pipe 5, the radial section 52, the circumferential connecting section 53, and the inclined section 54 are sequentially connected to form the grouting hole 51, which can prevent debris from entering the radial grouting pipe 32. The inlet end of the radial section 52 forms an installation hole on the inner wall of the jacking pipe 5, allowing the radial grouting pipe 32 to be installed therein. The outlet end of the inclined section 54 forms a grout outlet hole on the outer wall of the jacking pipe 5. The circumferential connecting section 53 connects the radial section 52 and the inclined section 54. Thus, during use, when the grout in the radial grouting pipe 32 is transported into the radial section 52, it is then pressed into the annular gap between the outer wall of the jacking pipe 5 and the soil from the circumferential connecting section 53 and the inclined section 54. Meanwhile, the number of inclined sections 54 on each circumferential connecting section 53 can be one, two, or three. When there are two or three inclined sections 54 on the circumferential connecting section 53, the inclined sections 54 are arranged sequentially at intervals along the length of the circumferential connecting section 53, and each inclined section 54 is connected to the circumferential connecting section 53. In this way, when the grout is transported into the circumferential connecting section 53, the grout is dispersed from the circumferential connecting section 53 to each inclined section 54, and then dispersed from the inclined section 54 to the annular gap between the jacking pipe 5 and the soil.

[0030] In this embodiment, preferably, the diameter of the inclined section 54 is larger than the diameter of the radial section 52. The inclined section 54 can be a funnel-shaped flared channel. The circumferential connecting section 53 includes an inlet end connected to the radial section 52 and an outlet end connected to the inclined section 54. From the inlet end to the outlet end, the diameter of the circumferential connecting section 53 gradually increases, so that the slurry flows along the radial section 52. The inclined section 54 can be inclined at a certain angle. In this way, during the process of slurry transportation along the grouting hole 51, the gradually expanding structure of the circumferential connecting section 53 reduces the slurry flow velocity along the path, makes the pressure distribution more uniform, and reduces the erosion of the inner wall of the pipe section. The flared design of the inclined section 54 increases the slurry injection angle. A filter body 55 is installed transversely inside the inclined section 54. The filter body 55 is located at the liquid outlet end of the outer wall of the jacking section 5 of the inclined section 54. The filter body 55 allows the grout to be smoothly injected into the annular gap between the jacking section 5 and the soil, and also prevents sand and gravel from entering the inclined section 54 and the radial grouting pipe 32.

[0031] In this embodiment, preferably, the annular grouting body 31 includes an annular pipe, which is coaxially and fixedly connected to the jacking section pipe 5. The inner wall of the annular pipe and the jacking section pipe 5 can be fixed by welding multiple supporting ribs. Multiple radial grouting pipes 32 are provided on the annular pipe, and the ends of the radial grouting pipes 32 are fixedly installed in the radial section 52 one-to-one. Each radial grouting pipe 32 is vertically welded and fixed to the annular pipe, and the radial grouting pipes 32 are interconnected with the annular pipe. An annular flow channel is formed inside the annular pipe, and each radial grouting pipe 32 is connected to the annular flow channel inside the annular pipe. The other end is detachably installed in the radial section 52, and the length of the radial grouting pipe 32 located in the radial section 52 is less than the length of the radial section 52. A sealing structure is provided at the end of the radial grouting pipe 32 and the radial section 52 to prevent the grout from leaking out. During use, the pump body 21 presses the grout into the annular pipe through the grouting pipe 22 and the delivery branch pipe 23, and disperses it to each radial grouting pipe 32 through the annular pipe. After the grout in the radial grouting pipe 32 is output, it is pressed into the annular gap between the outer wall of the jacking section pipe 5 and the soil along the radial section 52, the circumferential connecting section 53 and the inclined section 54.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A segmented grouting pumping system for long-distance pipe jacking construction, characterized in that, The system includes a slurry preparation and storage device, a pumping device, a grouting device, and a monitoring and control device. The slurry preparation and storage device is used to prepare the slurry required for grouting. The grouting device includes an annular grouting body disposed within a jacking section, with radial grouting pipes arranged circumferentially around the annular grouting body. The jacking section has grouting holes for installing the radial grouting pipes, and the grouting holes penetrate the pipe wall of the jacking section. The pumping device includes a pump body and a slurry delivery pipeline. The slurry delivery pipeline is connected to the slurry preparation and storage device, and a delivery branch pipe is disposed on the slurry delivery pipeline. The annular grouting body is connected to the delivery branch pipe. The monitoring and control device includes an automatic control valve and a pressure detection device. The pressure detection device includes a pressure gauge disposed within the annular grouting body, and the automatic control valve is disposed on the delivery branch pipe.

2. The segmented grouting pumping system for long-distance pipe jacking construction according to claim 1, characterized in that, There are multiple grouting holes, which are arranged at intervals along the circumference of the jacking section.

3. The segmented grouting pumping system for long-distance pipe jacking construction according to claim 1, characterized in that, From the center of the jacking section towards the outer wall, the grouting hole includes a connected radial section, a circumferential connecting section, and an inclined section, the length of which is greater than ...

4. The segmented grouting pumping system for long-distance pipe jacking construction according to claim 3, characterized in that, The diameter of the inclined section is larger than the diameter of the radial section.

5. The segmented grouting pumping system for long-distance pipe jacking construction according to claim 4, characterized in that, The circumferential connecting section includes an inlet end connected to the radial section and an outlet end connected to the inclined section. The diameter of the circumferential connecting section gradually increases from the inlet end to the outlet end.

6. The segmented grouting pumping system for long-distance pipe jacking construction according to claim 5, characterized in that, A filter body is horizontally arranged on the inclined section.

7. The segmented grouting pumping system for long-distance pipe jacking construction according to claim 3, characterized in that, The annular grouting body includes an annular pipe, which is coaxially and fixedly connected to the jacking section pipe.

8. The segmented grouting pumping system for long-distance pipe jacking construction according to claim 7, characterized in that, The annular pipe is provided with a plurality of radial grouting pipes, and the ends of the grouting pipes are fixedly installed in the radial section one by one.

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