Automatic slurry changing device and method for rigid and flexible combined slurry pipe

Abstract

The invention relates to an automatic slurry changing device and method for a rigid and flexible combined slurry pipe, and the automatic slurry changing device comprises a slurry outlet hose, a slurry suction steel pipe, a balancing weight, a circular filtering hole, an annular air hole belt, a compressed air conveying hose, an air compressor, a specific gravity detector and a slurry storage pool, the balancing weight and the circular filtering hole are arranged at the bottom of the slurry suction steel pipe, and the annular air hole belt is arranged at the lower part of the slurry suction steel pipe; the top is fixedly connected with a slurry outlet hose; the annular air hole belt is connected with a compressed air conveying hose to form a combined slurry pipe; the compressed air conveying hose is connected with an air compressor; and the slurry outlet hose is connected with the slurry storage tank through a self-adaptive slurry suction pump and a specific gravity detector. The gas lift reverse circulation principle is adopted, full-automatic standardized slurry changing construction can be achieved, convenience and reliability are achieved, the repeated utilization rate is high, the defects that traditional slurry changing is not standard, insufficient and unstable are overcome, visual monitoring is achieved for whole-course slurry changing, the construction condition facilitating slurry changing is created, subsequent wall seams of a ground wall and mud included in a wall body are greatly reduced, and the construction efficiency is improved. And the probability of rib leakage is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of slurry replacement in underground continuous wall construction, in particular to an air-lift reverse circulation automatic slurry replacement device using a rigid-flexible combined slurry pipe. Background Art

[0002] At present, the development and construction of underground space in the central urban area of ​​soft soil is still booming. With the progress of high-quality urban development, the quality and safety of the foundation pit itself and the protection standards of the surrounding environment are constantly improving, requiring that the underground enclosure and the main structure are leak-free. However, the development of underground space is often inseparable from enclosure construction. The high-quality development of enclosure construction has become an inevitable requirement of the industry.

[0003] In the current enclosure construction, the joints, whether they are rubber waterstop joints, lock pipe joints or cross steel plate joints of underground continuous walls, all revolve around the core point of no leakage. There is a common difficulty in the current construction, which is the slurry replacement of the slot section. As a crucial process, the quality of the slurry replacement is directly related to the stability of the slot wall, the thickness of the sediment, etc., which in turn affects the quality of concrete pouring. At present, there are many common problems in the slurry replacement, such as non-standard slurry replacement suction, insufficient slurry replacement at the bottom of the slot, and unstable slurry density after slurry replacement. Ultimately, during the concrete pouring process, impurities in the middle and lower part of the slot section are rolled into the slot section with the concrete, causing mud to be stuck in the wall and wall joints, and ultimately leading to leakage. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic slurry changing device and method using a rigid-flexible combined slurry pipe, which extracts the poor quality slurry at the bottom of the trough through the principle of air lift reverse circulation, repeats the cycle, and performs standard measurements on the extracted slurry until the quality of the slurry in the trough section, especially the slurry at the bottom of the trough, reaches the standard, and then stops the slurry changing, thereby providing favorable conditions for the quality of the wall.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is: an automatic slurry changing device that uses a rigid-flexible combined slurry pipe, including a slurry discharge hose, a slurry suction steel pipe, a counterweight, a circular filter hole, an annular air hole belt, a compressed air delivery hose, an air compressor, a specific gravity detector, and a slurry storage tank. A counterweight and a circular filter hole are arranged at the bottom of the slurry suction steel pipe, an annular air hole belt is arranged at the lower part, and the top is fixedly connected to the slurry discharge hose by a fixing bolt; the annular air hole belt is connected to the compressed air delivery hose to form a combined slurry pipe, and the compressed air delivery hose is connected to the air compressor; the slurry discharge hose is connected to the slurry storage tank through an adaptive slurry suction pump and a specific gravity detector.

[0006] Furthermore, the slurry discharge hose and the compressed air delivery hose located on the underground continuous wall groove section opening are fixed on the sliding tray, and the sliding tray is installed on the slide rails on both sides of the underground continuous wall groove section opening.

[0007] Furthermore, lifting openings are provided on both sides of the top of the grouting steel pipe.

[0008] A construction method of an automatic slurry changing device using a rigid-flexible combined slurry pipe, the steps of which are as follows:

[0009] Step 1: Connect the slurry discharge hose to the slurry suction steel pipe and fix them with fixing bolts to ensure effective connection;

[0010] Step 2: Install a counterweight at the bottom of the grouting steel pipe to ensure that the grouting steel pipe can sink to the bottom of the tank smoothly;

[0011] Step 3: Set multiple rows of circular filtering holes along the side of the lower part of the slurry suction steel pipe to filter large impurities at the bottom of the tank section to prevent the slurry pipe from being blocked during the slurry discharge process;

[0012] Step 4: Install an annular air hole belt at the bottom of the steel pipe, and connect the compressed air delivery hose to the annular air hole belt;

[0013] Step 6: Lift the combined slurry pipe as a whole through the lifting port and place it at the bottom of the trough section to remain still, insert the slurry discharge hose and the compressed air delivery hose into the sliding tray, and place them on the slide rail;

[0014] Step 7: Connect the compressed air delivery hose to the air compressor to provide continuous and stable compressed gas for subsequent slurry replacement;

[0015] Step 8: Connect the slurry discharge hose to the adaptive slurry suction pump, and connect the slurry suction pump to the mud specific gravity detector, and discharge the slurry into the mud backstage slurry storage tank after detection;

[0016] Step 9: Turn on the air compressor and the adaptive slurry suction pump, and simultaneously input fresh slurry from the top of the trough, observe the initial discharge status of the bottom mud, measure the mud indicators, record the core indicators of specific gravity, viscosity, and sand content, and move the combined slurry pipe horizontally at a uniform speed on the slide rail, and simultaneously record the slurry discharge indicators until the slurry discharge indicators tend to be stable, then re-test the bottom mud until the slurry indicators are qualified, and the standardized slurry change is completed, and then all the above-mentioned devices are dismantled for use in the lower trough section.

[0017] The beneficial effects of the present invention are:

[0018] The present invention adopts a combined slurry pipe device and method and the air lift reverse circulation principle to realize fully automatic standardized slurry replacement construction, which is convenient and reliable with a high reuse rate. It makes up for the shortcomings of traditional slurry replacement that is non-standard, insufficient and unstable. The slurry is replaced throughout the process to achieve visual monitoring, creating construction conditions that are convenient for slurry replacement and greatly reducing the probability of subsequent wall joints, mud inclusions in the wall, and reinforcement leakage in the ground wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of the automatic pulp changing device of the present invention;

[0020] Figure 2It is a schematic elevational cross-sectional view of the automatic pulp changing device of the present invention;

[0021] Figure 3 It is a detailed diagram of the main part of the automatic pulp changing device of the present invention;

[0022] In the figure: 1: slurry discharge hose, 2: slurry suction steel pipe, 3: fixing bolt, 4: counterweight block, 5: circular filtering hole, 6: annular air hole belt, 7: compressed air delivery hose, 8: lifting port, 9: sliding tray, 10: slide rail, 11: air compressor, 12: specific gravity tester, 13: slurry storage tank. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred embodiments of the present invention are described below in conjunction with specific embodiments:

[0024] The purpose of the present invention is to accurately control the slurry replacement of underground continuous wall groove sections, further substantially improve the slurry replacement quality of underground wall groove sections, and provide an automatic slurry replacement device and method using a rigid-flexible combined slurry pipe.

[0025] like Figures 1 to 3 As shown, an automatic slurry changing device for a rigid-flexible combined slurry pipe provided in an embodiment of the present invention includes a slurry outlet hose 1, a slurry suction steel pipe 2, a fixing bolt 3, a counterweight 4, a circular filter hole 5, an annular air hole belt 6, a compressed air delivery hose 7, a lifting port 8, a sliding tray 9, a slide rail 10, an air compressor 11, a specific gravity detector 12, and a slurry storage tank 13.

[0026] A counterweight block 4 and a circular filtering hole 5 are arranged at the bottom of the slurry suction steel pipe 2, an annular air hole belt 6 is arranged at the lower part, and the top is fixedly connected to the slurry discharge hose 1 through a fixing bolt 3; the annular air hole belt 6 is connected to the air compressor 11 through a compressed air delivery hose 7; the slurry discharge hose 1 is connected to the slurry storage tank 13 through an adaptive slurry suction pump and a specific gravity detector 12.

[0027] The slurry discharge hose 1 and the compressed air delivery hose 7 located on the underground continuous wall groove section opening are fixed on the sliding tray 9, and the sliding tray 9 is installed on the slide rails 10 on both sides of the underground continuous wall groove section opening.

[0028] Lifting openings 8 are provided on both sides of the top of the grout suction steel pipe 2 .

[0029] The present invention adopts an automatic slurry changing construction method using a rigid-flexible combined slurry pipe, and the steps are as follows:

[0030] Step 1: Connect the slurry discharge hose 1 to the slurry suction steel pipe 2 and fix them with a fixing bolt 3 to ensure effective connection;

[0031] Step 2: Install a counterweight 4 at the bottom of the grouting steel pipe to ensure that the grouting steel pipe can sink to the bottom of the tank smoothly;

[0032] Step 3: multiple rows of circular filtering holes 5 are arranged along the side of the lower part of the slurry suction steel pipe to filter large impurities at the bottom of the tank section to prevent the slurry pipe from being blocked during the slurry discharge process;

[0033] Step 4: Install the annular pore belt 6 at the bottom of the steel pipe, and connect the compressed air delivery hose 7 to the pore belt;

[0034] Step 6: hoist the combined pulp pipe as a whole through the hoisting port 8 and place it at the bottom of the trough section to remain stationary, insert the pulp discharge hose 1 and the compressed air delivery hose 7 into the sliding tray 9, and place them on the slide rail 10;

[0035] Step 7: Connect the compressed air delivery hose 7 to the air compressor 11 to provide continuous and stable compressed gas for subsequent slurry replacement;

[0036] Step 8: Connect the slurry discharge hose 1 to the adaptive slurry suction pump, and connect the slurry suction pump to the mud specific gravity detector 12, and discharge the slurry into the mud backstage slurry storage tank 13 after detection;

[0037] Step 9: Turn on the air compressor and the slurry suction pump, and simultaneously input fresh slurry from the top of the trough, observe the initial discharge status of the bottom mud, and measure the mud indicators, record the core indicators such as specific gravity, viscosity, and sand content, and move the combined slurry pipe horizontally at a uniform speed on the slide rail, and simultaneously record the slurry discharge indicators until the slurry discharge indicators tend to stabilize, then re-test the bottom mud until the slurry indicators are qualified, and the standardized slurry change is completed, and then all the above-mentioned devices are dismantled for use in the lower trough section.

Claims

1. An automatic pulp changing device using a rigid-flexible combined pulp pipe, characterized in that: It includes a slurry discharge hose, a slurry suction steel pipe, a counterweight, a circular filter hole, an annular air hole belt, a compressed air delivery hose, an air compressor, a specific gravity detector, and a slurry storage tank. A counterweight and a circular filter hole are arranged at the bottom of the slurry suction steel pipe, and an annular air hole belt is arranged at the lower part. The top is fixedly connected to the slurry discharge hose by a fixing bolt; the annular air hole belt is connected to the compressed air delivery hose to form a combined slurry pipe, and the compressed air delivery hose is connected to the air compressor; the slurry discharge hose is connected to the slurry storage tank through an adaptive slurry suction pump and a specific gravity detector.

2. The automatic pulp changing device for the combined rigid-flexible pulp pipe according to claim 1 is characterized in that: The slurry discharge hose and the compressed air delivery hose located on the underground continuous wall groove section opening are fixed on the sliding tray, and the sliding tray is installed on the slide rails on both sides of the underground continuous wall groove section opening.

3. The automatic pulp changing device for the rigid-flexible combined pulp pipe according to claim 2 is characterized in that: There are lifting openings on both sides of the top of the grouting steel pipe.

4. A construction method for an automatic slurry changing device using the rigid-flexible combined slurry pipe according to claim 3, characterized in that: The steps are as follows: Step 1: Connect the slurry discharge hose to the slurry suction steel pipe and fix them with fixing bolts to ensure effective connection; Step 2: Install a counterweight at the bottom of the grouting steel pipe to ensure that the grouting steel pipe can sink to the bottom of the tank smoothly; Step 3: Set multiple rows of circular filtering holes along the side of the lower part of the slurry suction steel pipe to filter large impurities at the bottom of the tank section to prevent the slurry pipe from being blocked during the slurry discharge process; Step 4: Install an annular air hole belt at the bottom of the steel pipe, and connect the compressed air delivery hose to the annular air hole belt; Step 6: Lift the combined slurry pipe as a whole through the lifting port and place it at the bottom of the trough section to remain still, insert the slurry discharge hose and the compressed air delivery hose into the sliding tray, and place them on the slide rail; Step 7: Connect the compressed air delivery hose to the air compressor to provide continuous and stable compressed gas for subsequent slurry replacement; Step 8: Connect the slurry discharge hose to the adaptive slurry suction pump, and connect the slurry suction pump to the mud specific gravity detector, and discharge the slurry into the mud backstage slurry storage tank after detection; Step 9: Turn on the air compressor and the adaptive slurry suction pump, and simultaneously input fresh slurry from the top of the trough, observe the initial discharge status of the bottom mud, measure the mud indicators, record the core indicators of specific gravity, viscosity, and sand content, and move the combined slurry pipe horizontally at a uniform speed on the slide rail, and simultaneously record the slurry discharge indicators until the slurry discharge indicators tend to be stable, then re-test the bottom mud until the slurry indicators are qualified, and the standardized slurry change is completed, and then all the above-mentioned devices are dismantled for use in the lower trough section.

Images