Grouting hose device for pipe jacking type grouting and construction method

Abstract

The invention discloses a grouting hose device for pipe-jacking type grouting and a construction method. The grouting hose device comprises a flow guide assembly, a pipe jacking assembly, a pipe jacking assembly and a pipe jacking assembly, the grouting control module can control the flow speed of the concrete grout guided by the grouting machine, and comprises a pulse device for preventing the concrete grout from blocking a pipeline; the grouting pipe group comprises a grouting hose and is used for grouting a gap between the jacking pipe and the soil layer; grout outlets are uniformly formed in the grouting hose, and the grouting hose is symmetrically arranged on the two sides of the jacking pipe, so that grouting is more uniform and full; the whole grouting process is monitored in real time through the grouting monitoring module, a pulse device arranged in the grouting monitoring module is matched, the blocking situation of a grouting pipeline is effectively reduced, meanwhile, the device can adapt to different construction intervals on site through a sectional type combined installation structure, and the working condition adaptability of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of geotechnical engineering technology, and in particular to a grouting hose device and construction method for pipe jacking grouting. Background Technology

[0002] Grouting is a crucial process for ensuring the stability of the soil around pipelines and reducing surface settlement. The grouting hose, as a core component of the grouting system, directly affects the grouting effect. Traditional pipe jacking grouting methods use a single hose, one end connected to the grouting machine and the other inserted into the grouting hole at the top of the dedicated pipe. This method has several drawbacks: pressure is concentrated near the grouting hole, resulting in uneven pressure distribution and grout in the middle of the pipe being injected only by gravity, leading to incomplete grouting. The hose material has poor wear and corrosion resistance, making it prone to wear and leakage over long-term use; the connection points have poor sealing, easily causing grout leakage; the lack of real-time monitoring during grouting, with flow and pressure controlled entirely by manual experience, easily leads to uneven grouting or pipe blockage; blockage is difficult to clear, requiring pipe disassembly and affecting construction efficiency; and the simple nozzle structure is easily clogged by grout impurities, further reducing grouting quality.

[0003] Therefore, there is an urgent need for a new facility and equipment to solve the problems of incomplete grouting of hoses, poor sealing effect at connection points, easy leakage of grout, easy blockage of grouting equipment, lack of monitoring, and low construction efficiency in the existing technology, so as to improve the controllability and grouting quality of pipe jacking construction. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a grouting hose device and construction method for pipe jacking grouting, which solves the problems of incomplete grouting of hoses, poor sealing effect of connection parts, easy leakage of grout, easy blockage of grouting equipment, lack of monitoring, and low construction efficiency in the prior art, thereby improving the controllability and grouting quality of pipe jacking grouting construction.

[0005] The present invention provides a grouting hose device for pipe jacking grouting, comprising:

[0006] The flow guiding component connects to the grouting machine to introduce concrete slurry;

[0007] The grouting control module can control the flow rate of concrete grout introduced by the grouting machine, including a pulse device to prevent concrete grout from clogging the pipes.

[0008] Grouting pipe assembly, including grouting hose, is used to grout the gap between the jacking pipe and the soil layer.

[0009] Furthermore, the grouting pipe assembly includes a multi-port valve, the grouting hose is provided with a grouting branch, the multi-port valve is connected to the grouting pipe and the grouting branch through a conduit, and the other side of the multi-port valve is connected to the grouting control module.

[0010] Furthermore, the grouting hose is a flexible hose with a certain strength. The grouting hose has multiple sets of outlet holes evenly arranged along the length of the top pipe on the outer side, and grouting is continuously injected from the bottom outward.

[0011] Furthermore, the grouting branch is connected to the conduit via a pressure-bearing sealing buckle.

[0012] Furthermore, the flow guiding component is an adjustable hose, which is connected to the grouting machine via a flange, and the other end is connected to the grouting control module.

[0013] Furthermore, the grouting control module includes a monitoring unit, which includes a flow monitoring pipe and a base. One end of the flow monitoring pipe is connected to an adjustable hose, and the other end serves as a grout outlet connected to the grouting pipe assembly. The flow monitoring pipe is snapped and fixed to the base, and the base is equipped with a flow velocity sensor. The concrete flow velocity in the flow monitoring pipe can be detected by the flow velocity sensor. The pulse device is integrated at the grout outlet.

[0014] Furthermore, the grouting control module also includes a control unit, which includes a signal receiver and a PLC microcontroller. The signal receiver can receive signals from the monitoring unit and adjust the flow rate and pressure threshold parameters through the PLC microcontroller.

[0015] Furthermore, the adjustable hose has an approximate bellows structure, and an elastic seal is provided between the adjustable hose and the flange.

[0016] Furthermore, a construction method for a grouting hose device for pipe jacking grouting includes the following steps:

[0017] S1, adjust the connecting hose to the grouting machine according to the size of the cavity in the stratum under construction;

[0018] S2, insert the grouting pipe assembly into the formation cavity;

[0019] S3: Start the grouting machine and grouting monitoring module, set the flow rate threshold and pressure threshold, and monitor in real time;

[0020] S4, the control unit receives and analyzes the signal, and controls the grouting process to prevent blockage based on the analysis results;

[0021] S5, After the grouting operation is completed, start the pulse device to clean the pipeline;

[0022] S6, shut down the equipment and disassemble the device.

[0023] The beneficial effects of the present invention are as follows: The present invention provides a grouting hose device and construction method for pipe jacking grouting; by utilizing the evenly distributed grout outlets on the grouting hose and their symmetrical arrangement on both sides of the pipe jacking, the grouting is made more uniform and full; the entire grouting process is monitored in real time by the grouting monitoring module, and the pulse device set in the module effectively reduces the occurrence of grouting pipeline blockage. At the same time, the segmented combined installation structure can adapt to different construction spacings on site, improving the adaptability of the device to different working conditions. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the grouting hose of the present invention;

[0027] Figure 3 This is a left-side cross-sectional view of the grouting control module of the present invention; Detailed Implementation

[0028] like Figures 1 to 3 As shown: This embodiment illustrates a grouting hose device and construction method for pipe jacking grouting, comprising:

[0029] The flow guiding component 1 is connected to the grouting machine to introduce concrete slurry. The flow guiding component 1 can be adjusted according to the actual construction needs on site. The flow guiding component 1 can be L-shaped, cylindrical, or segmented. It is connected to the grouting machine to guide the concrete into the grouting control module 2 for grouting control and monitoring.

[0030] Grouting control module 2 controls the flow rate of concrete grout introduced by the grouting machine, including a pulse device 205 to prevent concrete grout from clogging the pipes. Grouting control module 2 is essentially a transition section in the entire grouting process. This transition section integrates multiple sensors to monitor the grouting process and prevent reduced construction efficiency due to insufficient flow rate. The pulse device 205 offers various options, such as electromagnetic pulses, laser pulses, and shock wave pulses, to improve the situation of concrete clogging the pipes, with shock wave pulses being the most common. The pulse device is most effective for hard and brittle materials (highly brittle): such as glass, ceramics, stone, concrete, and rock. These materials have high internal structural rigidity and are difficult to deform; stress waves easily generate cracks within them and propagate, leading to pulverization. For tough materials: such as metals, rubber, and plastics, these materials can absorb energy and deform (stretch or bend) rather than directly fracture; pulses may deform or create dents, but it is difficult to completely "shatter" them into fragments. In this real-time example, acoustic or ultrasonic pulse devices are preferred to accommodate the adhesive soft deposits formed by the concrete grout.

[0031] The grouting pipe assembly 3 includes a grouting hose 302, used for grouting the gap between the jacking pipe 4 and the soil layer. The grouting hose 301 can adapt well to the irregular space between the jacking pipe and the soil layer, smoothly entering the excavation space formed by the jacking operation, i.e., placing the hole formed by the jacking pipe. The grouting hose 302 can be set with multiple sets of coordinated grouting in the gap to ensure the efficiency and uniformity of grouting, and to improve the fault tolerance for grouting failure caused by blockage of individual pipes.

[0032] In this embodiment, the grouting pipe assembly 3 includes a multi-way valve 305, the grouting hose 302 is provided with grouting branches, and the multi-way valve port is connected to the grouting hose 302 and the grouting branches 301 through a conduit 304. The other side of the multi-way valve port is connected to the grouting control module 2. The multi-way valve 305 has more than or equal to 4 valve ports, and the number of valve ports that can be opened can be selected according to the actual needs on site to prevent grout from seeping out of the connection ports that are not connected to the pipeline. The multi-way valve 305 is a prior art multi-way valve 305 that can be selected as needed, and will not be described in detail here. The outside of the grouting hose 302 is provided with multiple sets of grouting branches 301. The grouting branches and the grouting pipe are connected to facilitate the rapid filling of the entire grouting pipe with concrete grout, thereby improving the grouting efficiency.

[0033] In this embodiment, the grouting hose 302 is a flexible hose. Multiple sets of grouting hoses 302 are spaced apart on the outer side of the jacking pipe, and multiple sets of grout outlet holes 3021 are evenly distributed along the length of the jacking pipe, allowing continuous grouting from the bottom outwards. The hose body of the grouting hose 302 is made of flexible material, preferably high-elasticity rubber, with 5mm diameter grout outlet holes 302 evenly distributed axially. The hole spacing can be adjusted within the range of 100-200mm according to the geological characteristics, facilitating uniform diffusion of grout into the tunneling cavity and solving the problem of uneven grout discharge in traditional grouting pipes. The grout diffusion area is increased by 40%, ensuring the density of the filling in the geological formation. As shown in the figure, at least two grouting hoses are provided: the grouting hose 302 and the retention pipe 303. The grouting hose 302 and the retention pipe 303 have the same structure. The grouting hose 302 and the retention pipe 303 can be symmetrically arranged on both sides of the jacking pipe 4 to improve the uniformity of grouting. After grouting is completed, one of them can be left in the gap to serve as the grouting skeleton and improve the strength. The grouting method from bottom to top can well control the grout to fill the entire grouting hose, that is, no cavity is generated in the pipe to affect the uniformity of grouting.

[0034] In this embodiment, the grouting branch 301 is connected to the conduit 304 via a pressure-bearing sealing buckle 306. The pressure-bearing sealing buckle 306 preferably adopts a stainless steel bayonet with a 4-point threaded adapter, which is the buckle used for connecting water pipes in washing machines in daily life. It mainly serves a connection function and its sealing requirements are not high, as long as there is no large amount of grout leakage. The buckle material has mature technology and a wide range of models, so it will not be described in detail here.

[0035] In this embodiment, the flow guiding component 1 is an adjustable hose 102. The adjustable hose 102 is connected to the grouting machine via a flange 101, and the other end is connected to the grouting control module 2. The flange 101 is made of cast steel and is fixedly connected to the grout inlet of the grouting machine with bolts, providing high strength and adaptability. Its high disassembly capability during pipeline cleaning also facilitates segmented cleaning. The adjustable hose is detachably connected to the grouting control module by welding or using existing sealing buckles, as long as the connection is secure and leak-proof.

[0036] In this embodiment, the grouting control module 2 includes a monitoring unit, which includes a flow monitoring pipe 201 and a base 203. One end of the flow monitoring pipe 201 is connected to an adjustable hose 102; the other end serves as a grout outlet connected to the grouting pipe assembly 3. The flow monitoring pipe 201 is snapped and fixed to the base 203. The base is equipped with a flow velocity sensor 202, the sensing end of which is placed inside the flow monitoring pipe 201. The concrete flow velocity inside the flow monitoring pipe 201 can be detected by the flow velocity sensor. The pulse device 205 is integrated at the grout outlet. The base 203 is a cuboid structure with a semi-circular slot on the upper part. The semi-circular slot is conformal to the flow monitoring pipe 201, i.e., the size is the same to facilitate the snapping of the flow monitoring pipe 201. Furthermore, a pressure sensor 204 is also provided at the slurry outlet end of the flow monitoring tube 201. The sensing end of the pressure sensor 204 is integrated inside the flow regulating tube. The pressure sensor 204 is a diffused silicon type, with a measurement range of 0-15MPa and an accuracy of ≤±0.8%. The flow velocity sensor is electromagnetic induction type, with a measurement accuracy of ≤±1.5%FS and a sampling frequency of 15Hz. The flow velocity sensor 202 and pressure sensor 204 transmit signals to the control unit 206 through shielded cables and wireless connections, preventing situations where the equipment cannot be installed properly due to site conditions, thus improving site applicability. The data transmission delay of the wired control is also smaller and more stable. The pulse device 205 is integrated into the connection section between the flow monitoring pipe 201 and the multi-channel valve 305. It impacts the inner wall of the pipeline with high-frequency pulse pressure, with an operating frequency of 15-40Hz and a pulse pressure of 0.8-3MPa. The pulse device can effectively break up slurry deposits in the pipeline and prevent blockage. That is, through active pulse impact, it solves the problem of easy blockage of traditional hoses. The pulse device 205 can be automatically triggered according to monitoring data. It is also equipped with a protective cover 207 on the outside to prevent damage to the device during grouting. It does not require manual disassembly and cleaning, reducing the pipeline blockage rate by 70% and significantly improving construction efficiency.

[0037] In this embodiment, the grouting control module 2 further includes a control unit 206, which includes a signal receiver and a PLC microcontroller. The signal receiver receives signals from the monitoring unit and uses the PLC microcontroller to adjust the flow rate and pressure threshold parameters. When the flow rate sensor and pressure sensor detect abnormal data, they are fed back to the PLC microcontroller for processing. The PLC microcontroller then adjusts the grouting speed of the grouting machine. If analysis indicates that there is a blockage in the pipeline, the pulse device 205 is activated to handle the potentially blocked pipeline. This achieves real-time dynamic monitoring of the grouting process, replacing the traditional extensive management based on manual judgment. Precise flow rate and pressure data provide a scientific basis for adjusting construction parameters, avoiding formation stability problems caused by uneven grouting, and improving grouting controllability by 45%.

[0038] In this embodiment, the adjustable hose 102 has an approximate corrugated pipe structure, and an elastic sealing element is provided between the adjustable hose 102 and the flange 101. The elastic sealing gasket is made of fluororubber to ensure the sealing effect under high-pressure grouting. The adjustable hose 102 has a corrugated pipe structure with a telescopic stroke of 100-300mm, which can flexibly adjust the length of the device according to the construction spacing. After adjustment, it is fixed by the limiting structure of the pipe body itself, realizing flexible adaptation of the construction spacing and solving the problem of fixed length of traditional hoses. The flange connection method is convenient for disassembly and assembly, and the telescopic function of the adjustable hose enables the device to adapt to the cavities of the formation under different working conditions, improving versatility by more than 50%.

[0039] In this embodiment, a construction method for a novel jacking-type grouting hose includes the following steps:

[0040] S1. Adjust the connecting hose 102 to the grouting machine according to the size of the cavity in the stratum. Specifically, adjust the extension length of the adjustable hose 102 according to the size of the cavity and the construction spacing to ensure the device fully fits the cavity space. Align the flange 101 with the grout inlet of the grouting machine, place the elastic sealing gasket, and tighten with bolts to ensure a leak-free seal. Connect the power supply to the intelligent control unit, start the equipment for debugging, check if the monitoring module and pulse device 205 are working properly, and set the flow velocity and pressure thresholds suitable for the current stratum.

[0041] S2, extend the grouting pipe assembly into the formation cavity; that is, use the jacking pipe 4 to put the grouting hose 302 and the retention pipe 303 in the grouting pipe assembly 3 into the formation cavity together, so as to ensure that the grouting hose and the retention pipe 303 will not be blocked in any place in the formation space due to the flexible material.

[0042] S3: Start the grouting machine and grouting control module, set the flow rate threshold and pressure threshold, and monitor in real time;

[0043] S4, the control unit 206 receives and analyzes the signal, and controls the grouting process to prevent blockage based on the analysis results; the control unit performs graded regulation based on the data monitoring results: under normal operating conditions, when the real-time flow rate and pressure are within the set threshold range, the grouting machine is kept running normally and the data is continuously monitored; under warning conditions, when the flow rate is lower than the lower threshold or the pressure is higher than the upper threshold, it indicates that there may be a slight blockage in the pipeline, and the control unit immediately controls the grouting machine to reduce the grouting rate by 20%-40%, and at the same time starts the pulse device 205 to work at a low frequency of 15-25Hz to continuously monitor data changes;

[0044] Abnormal operating conditions: If the data does not return to normal after adjustment, or if the pressure exceeds the safety threshold, the intelligent control unit will issue an audible and visual warning, automatically stop the grouting machine, and activate the pulse device to operate at a high frequency of 25-40Hz. Once the sensors detect that the data has returned to normal, the grouting machine can be manually restarted to continue operation.

[0045] S5. After the grouting operation is completed, start the pulse device 205 to clean the pipeline; that is, after the grouting operation meets the design requirements, turn off the grouting machine, keep the control unit 206 running, start the pulse device 205 to work at high frequency for 3-8 minutes to impact the residual grout on the inner wall of the pipeline until the cleaning is completed.

[0046] S6, shut down the equipment and disassemble the device.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A grouting hose device for pipe jacking grouting, characterized in that: include: The flow guiding component connects to the grouting machine to introduce concrete slurry; The grouting control module can control the flow rate of concrete grout introduced by the grouting machine, including a pulse device to prevent concrete grout from clogging the pipes. Grouting pipe assembly, including grouting hose, is used to grout the gap between the jacking pipe and the soil layer.

2. The grouting hose device for pipe jacking grouting according to claim 1, characterized in that: The grouting pipe assembly includes a multi-port valve, the grouting hose is provided with a grouting branch, the multi-port valve is connected to the grouting pipe and the grouting branch through a conduit, and the other side of the multi-port valve is connected to the grouting control module.

3. The grouting hose device for pipe jacking grouting according to claim 6, characterized in that: The grouting hose is a flexible hose with a certain strength. The grouting hose has multiple sets of outlet holes evenly arranged along the length of the top pipe on the outer side, and grouting is continuously injected from the bottom outward.

4. The grouting hose device for pipe jacking grouting according to claim 2, characterized in that: The grouting branch is connected to the conduit via a pressure-bearing sealing buckle.

5. The grouting hose device for pipe jacking grouting according to claim 1, characterized in that: The flow guiding component is an adjustable hose, which is connected to the grouting machine via a flange, and the other end is connected to the grouting control module.

6. The grouting hose device for pipe jacking grouting according to claim 1, characterized in that: The grouting control module includes a monitoring unit, which includes a flow monitoring pipe and a base. One end of the flow monitoring pipe is connected to an adjustable hose, and the other end serves as a grout outlet connected to the grouting pipe assembly. The flow monitoring pipe is snapped and fixed to the base, and the base is equipped with a flow velocity sensor. The concrete flow velocity in the flow monitoring pipe can be detected by the flow velocity sensor. The pulse device is integrated at the grout outlet.

7. The grouting hose device for pipe jacking grouting according to claim 1, characterized in that: The grouting control module also includes a control unit, which includes a signal receiver and a PLC microcontroller. The signal receiver can receive signals from the monitoring unit and adjust the flow rate and pressure threshold parameters through the PLC microcontroller.

8. The grouting hose device for pipe jacking grouting according to claim 5, characterized in that: The adjustable hose has a corrugated pipe structure, and an elastic seal is provided between the adjustable hose and the flange.

9. A construction method for a grouting hose device for pipe jacking grouting, comprising using the grouting hose device for pipe jacking grouting as described in any one of claims 1-8, characterized in that: Includes the following steps: S1, adjust the connecting hose to the grouting machine according to the size of the cavity in the stratum under construction; S2, insert the grouting pipe assembly into the formation cavity; S3: Start the grouting machine and grouting monitoring module, set the flow rate threshold and pressure threshold, and monitor in real time; S4, the control unit receives and analyzes the signal, and controls the grouting process to prevent blockage based on the analysis results; S5, After the grouting operation is completed, start the pulse device to clean the pipeline; S6, shut down the equipment and disassemble the device.

Images