Municipal pipeline backfilling construction system and method

Abstract

The municipal pipeline backfilling construction system comprises a concrete cushion layer, the upper end of the concrete cushion layer is provided with a pipeline through a concrete base, the pipeline is buried in a backfilling layer, one end of the backfilling layer is provided with a slope structure, the upper end face of the backfilling layer is provided with a vibration compaction device, and the vibration compaction device is provided with a vibration compaction device. A concrete pressing plate is arranged at the inclined face end of the backfill layer, a PVC watering pipe is supported at the upper end of the vibration compaction device through a support and connected with an electric three-way ball valve through a water feeding hose, and the electric three-way ball valve is further connected with a submersible pump and a water discharging hose. And the vibration compaction device, the electric three-way ball valve and the submersible pump are electrically connected with a control terminal through cables. According to the method, the characteristic that sand and stone chips are easy to compact in a saturated state is utilized, the water content of the backfill material is saturated through circulating water irrigation, and heavy object pre-pressing and vibration measures are added, so that the backfill material gradually reaches a compact state under the action of water flow, pressure and vibration.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline backfilling, and in particular to a municipal pipeline backfilling construction system and method. Background Art

[0002] Municipal pipeline projects, as an important part of urban infrastructure, play a key role in the normal operation of cities and the quality of life of residents. These pipelines not only provide residents with essential services such as drinking water, gas, and electricity, but are also part of important systems such as urban drainage and flood control. With the acceleration of urbanization, the demand and quality requirements for municipal pipeline projects are also getting higher and higher.

[0003] In the construction process of municipal pipeline projects, pipeline backfilling is one of the most important links. At present, common pipeline backfill materials include crushed stone, loess, cement, sand, stone chips, etc., but traditional backfill material compaction methods such as mechanical compaction or compaction, manual compaction, etc. are easily affected by construction conditions and environmental factors, often resulting in unstable compaction quality. In addition, there is no optimal moisture content for sand and stone chips. They are only easy to compact in two states: completely air-dried and saturated. However, these two materials are generally in a wet state during backfilling, which makes it difficult for traditional compaction methods to effectively compact sand or stone chips, affecting the construction quality and service life of municipal pipeline projects. Summary of the invention

[0004] In view of the above technical problems in the related art, the present invention provides a municipal pipeline backfill construction system and method, which can solve the above problems.

[0005] To achieve the above technical objectives, the technical solution of the present invention is implemented as follows: A municipal pipeline backfill construction system includes a concrete cushion layer, a pipeline is installed on the upper end of the concrete cushion layer through a concrete base, the pipeline is buried in the backfill layer, one end of the backfill layer is provided with a slope structure, the upper end surface of the backfill layer is provided with a vibration compaction device, the slope end of the backfill layer is provided with a concrete pressure plate, the upper end of the vibration compaction device is supported by a PVC watering pipe through a bracket, the PVC watering pipe is connected to an electric three-way ball valve through a water supply hose, the electric three-way ball valve is also connected to a submersible pump and a water discharge hose, and the vibration compaction device, the electric three-way ball valve, and the submersible pump are all electrically connected to a control terminal through cables.

[0006] Furthermore, an inverted filter layer is paved on the upper end surface of the concrete cushion layer, a water collection well is provided below one side end of the inverted filter layer, and the submersible pump is located in the water collection well.

[0007] Furthermore, the filter layer is provided with a first stone layer composed of crushed stone or pebbles with a particle size of 30 to 40 mm, a second stone layer composed of crushed stone or pebbles with a particle size of 5 to 10 mm, and a geotextile in sequence from top to bottom.

[0008] Furthermore, the vibration compaction device includes a steel shell, the bottom surface of which is connected to a high-frequency vibrator sealing box with a top plate through a sealing box base, a high-frequency vibrator is installed in the high-frequency vibrator sealing box, and the space between the high-frequency vibrator sealing box and the steel shell is filled with a concrete filling body.

[0009] Furthermore, the upper ends of the vibration compaction device and the concrete pressure plate are symmetrically provided with two lifting ears 1 and 2, respectively, the bottom surface of the steel shell is provided with a plurality of water leakage holes, and the concrete filling body is a permeable concrete with a porosity of not less than 25%.

[0010] Furthermore, a plurality of groups of water holes are provided at the bottom of the PVC watering pipe, and each group of water holes is arranged in a plum blossom shape. An electric water supply valve is provided at the water inlet end of the PVC watering pipe, and a flow meter is provided on the rear side of the electric water supply valve. The electric water supply valve and the flow meter are both electrically connected to the control terminal.

[0011] Furthermore, the backfill material in the backfill layer is medium-coarse sand or stone chips.

[0012] A municipal pipeline backfill construction method comprises the following steps: S1, excavating a pipeline trench, pouring the concrete cushion layer, then pouring the concrete base and placing the pipeline; S2, laying the water filter layer on both sides of the concrete base; S3, loosely spread the backfill material in layers around the pipeline until it reaches the height multiplied by the design height and the loose spreading coefficient, scrape the unbackfilled end into an inclined surface, and hoist the concrete pressing plate to place it on the inclined surface; S4, hoisting a number of the vibration compaction devices according to the construction length and placing them on the top surface of the backfill layer, placing a bracket on each vibration compaction device, and placing a PVC watering pipe on the bracket; S5, excavating a water collection pit, placing the water collection pit and the submersible pump, installing the electric three-way ball valve, the water supply hose and the water discharge hose, and connecting the electric three-way ball valve to the submersible pump, the water supply hose and the water discharge hose respectively; S6. The vibration compaction device, the electric three-way ball valve, the submersible pump, the water supply electric valve, and the flow meter are electrically connected to the control terminal through cables, and the control terminal is started to control the compaction operation process of the backfill layer. Water first flows from the downcomer hose to the water collection well. After the submersible pump is automatically turned on, water enters the PVC watering pipe from the water supply hose, and is dispersed to the area to be compacted through the water-permeable holes and the vibration compaction device. The vibration compaction device starts to vibrate (the operating frequency is not less than 100 Hz). After the water penetrates into the backfill material, combined with the influence of pressure and vibration, the backfill material gradually tends to be dense, and the infiltrated water passes through the water filtration layer and then re-enters the water collection well for recycling.

[0013] Furthermore, when the water level of the water collection well is lower than preset value one, the control terminal controls the electric three-way ball valve to perform action one, and at the same time controls the submersible pump to be closed, and water flows into the water collection well through the lower water hose. When the water level of the water collection well reaches preset value two, the control terminal controls the electric three-way ball valve to perform action two, and at the same time controls the submersible pump to be opened, and the water pumped by the submersible pump enters the PVC watering pipe through the upper water hose.

[0014] Furthermore, before the municipal pipeline backfill construction is officially carried out, a test section for the municipal pipeline backfill construction is established based on steps S1 to S6, and the working time of the high-frequency vibrator, the working frequency of the high-frequency vibrator, and the amount of water spraying are used as research variables to carry out a municipal pipeline backfill experiment, and the test results are summarized, and the best experimental values ​​or change values ​​of the research variables are selected, and the best experimental values ​​or change values ​​are imported into the control terminal.

[0015] Beneficial effects of the present invention: (1) This application utilizes the property that sand and stone chips are easy to compact in a saturated state. The water content of the backfill material is saturated through circulating water irrigation, and heavy pre-compression and vibration measures are added to gradually make the backfill material reach a dense state under the action of water flow, pressure and vibration. It can avoid the unstable compaction quality often caused by traditional compaction methods such as mechanical compaction or compaction, and manual compaction, and is minimally affected by construction conditions and environmental factors. It is easy to ensure the density and uniformity of the backfill material around the pipeline, thereby ensuring the construction quality of the municipal pipeline project.

[0016] (2) Conventional municipal pipeline backfilling generally adopts layered construction, which requires the backfill material to be divided into more than a dozen layers less than 30 cm, and the layers are filled and compacted. Each layer requires the use of small machinery to tamp or compact the construction area several times. When compacting above the pipeline, it is easy to damage the pipeline, and the construction efficiency is low. This application optimizes the layered backfilling into overall backfilling, which greatly improves the construction efficiency, avoids damage to the pipeline, and reduces the construction cost. It has good application prospects and market potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] The present invention will be described in further detail below with reference to the accompanying drawings.

[0019] Figure 1 It is a front view of a municipal pipeline backfill construction system according to an embodiment of the present invention; Figure 2 It is a left view of a municipal pipeline backfill construction system according to an embodiment of the present invention; Figure 3 2 is a top view of the vibratory compaction device according to an embodiment of the present invention.

[0020] In the figure: 1. Vibration compaction device; 1-1. Steel shell; 1-2. Concrete filling body; 1-3. High-frequency vibrator sealing box; 1-4. High-frequency vibrator; 1-5. Lifting ear one; 1-6. Cable one; 2. PVC watering pipe; 3. Concrete pressure plate; 3-1. Lifting ear two; 4. Bracket; 5. Water supply hose; 6. Water discharge hose; 7. Electric three-way ball valve; 8. Water collection well; 9. Submersible pump; 9-1. Cable two; 10-1. Stone layer one; 10-2. Stone layer two; 10-3. Geotextile; 11. Control terminal; 12. Concrete cushion layer; 12-1. Concrete base; 13. Backfill layer; 14. Pipeline. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0022] like Figure 1-3As shown, according to the present invention, a municipal pipeline backfill construction system and method are disclosed, and during the construction, the following steps are included: S1, excavating a pipeline trench, pouring the concrete cushion layer 12, then pouring the concrete base 12-1 and placing the pipeline 14; S2, laying the water filter layer on both sides of the concrete base 12-1; S3, loosely spread the backfill material in layers around the pipeline until it reaches the height multiplied by the design height and the loose spreading coefficient, scrape the unbackfilled end into an inclined surface, and hoist the concrete pressing plate 3 and place it on the inclined surface; S4, hoisting a number of the vibration compaction devices 1 according to the construction length and placing them on the top surface of the backfill layer 13, placing a bracket 4 on each vibration compaction device 1, and placing a PVC watering pipe 2 on the bracket 4; S5, excavate a water collection pit, place the water collection pit 8 and the submersible pump 9, install the electric three-way ball valve 7, the water supply hose 5 and the water discharge hose 6, and connect the electric three-way ball valve 7 to the submersible pump 9, the water supply hose 5 and the water discharge hose 6 respectively; S6. The vibration compaction device 1, the electric three-way ball valve 7, the submersible pump 9, the water supply electric valve 2-2, and the flow meter are electrically connected to the control terminal 11 through cables (for example, the high-frequency vibrator 1-4 is connected to the control terminal 11 through cable 1-6, and the submersible pump 9 is connected to the control terminal 11 through cable 2 9-1), and the control terminal 11 is started to control the compaction operation process of the backfill layer 13. Water first flows from the downcomer hose 6 to the water collection well 8. After the submersible pump 9 is automatically turned on, water enters the PVC watering pipe 2 through the water-permeable hole 2-1 and the vibration compaction device 1 and is dispersed to the area to be compacted. The vibration compaction device 1 starts to vibrate. After the water penetrates into the backfill material, combined with the influence of pressure and vibration, the backfill material gradually tends to be dense, and the infiltrated water passes through the water filtration layer and re-enters the water collection well 8 for recycling.

[0023] Embodiment 1: In the present application, an arc-shaped installation groove is opened on the upper end surface of the concrete base 12-1, and the pipe 14 is installed in the arc-shaped installation groove for positioning. At the same time, after the pipe 14 is placed in the arc-shaped installation groove, the volume under the armpit of the pipe 14 can be reduced, which is beneficial to the overall backfilling plan of the present application.

[0024] The filter layer is laid on both sides of the concrete base 12-1, and the filter layer is provided with a stone layer 10-1 composed of crushed stones or pebbles with a particle size of 30-40 mm, a stone layer 10-2 composed of crushed stones or pebbles with a particle size of 5-10 mm, and a geotextile 10-3 from top to bottom. The sewage seeping from the backfill layer 13 can be purified and filtered through the stone layer 10-1, the stone layer 10-2, and the geotextile 10-3, and finally flow into the collection well 8 for reuse.

[0025] Embodiment 2: The vibratory compaction device 1 in the present application comprises a steel shell 1-1, a concrete filling body 1-2, a high-frequency vibrator sealing box 1-3 and a high-frequency vibrator 1-4, wherein the upper end of the vibratory compaction device 1 is also symmetrically provided with two lifting ears 1-5 to facilitate the turnover use of the vibratory compaction device 1; the concrete filling body 1-2 in the present application is a permeable concrete with a porosity of not less than 25%, and at the same time, a plurality of water leakage holes are opened on the bottom surface of the steel shell 1-1, and further, a plurality of channels connected to the water leakage holes and the permeable concrete are provided inside the base of the sealing box, thereby ensuring that the water poured from the PVC watering pipe 2 can leak into the area to be compacted through the upper end of the vibratory compaction device 1.

[0026] The upper end surface height of the high-frequency vibrator sealing box 1-3 in the present application is not lower than the upper end surface height of the concrete filling body 1-2. Preferably, the upper end surface height of the high-frequency vibrator sealing box 1-3 is 1 cm higher than the upper end surface height of the concrete filling body 1-2. At the same time, the connection of the upper top plate of the high-frequency vibrator sealing box 1-3 needs to be sealed. Further, the upper top plate can be set in a V shape to avoid water accumulation, and the cable holes on the upper top plate are also sealed (for example, using a sealing ring and a sealing resin material).

[0027] The concrete pressing plate 3 in the present application is a precast concrete plate of not less than C30, on which two lifting ears 3-1 are symmetrically arranged for easy turnover. Its plane size is equivalent to the oblique side surface of the area to be compacted, and its thickness is not less than 15 cm.

[0028] Embodiment three: In the present application, the upper end of the vibrating compaction device 1 is supported by a bracket 4 with a PVC watering pipe 2. The bracket 4 can be made of three or four round steel pipes with a diameter of 5 cm, which are welded at a certain angle. At the same time, a positioning hole can be set in the vibrating compaction device 1 so that the bracket 4 can be inserted into the positioning hole for positioning. In the present application, a plurality of groups of water-permeable holes 2-1 are opened at the bottom of the PVC watering pipe 2. Each group of water-permeable holes 2-1 is arranged in a plum blossom shape, with no less than 24 holes per meter. The diameter of the water-permeable holes 2-1 is 5 mm. At the same time, a water supply electric valve 2-2 is provided at the water inlet end of the PVC watering pipe 2. A flow meter is provided at the rear side of the water supply electric valve 2-2. The opening degree of the water supply electric valve 2-2 is controlled by the control terminal 11. Thus, the water supply amount is controlled and monitored by the flow meter.

[0029] Embodiment 4: In the present application, when the water level of the water collection well 8 is lower than the preset value one (the water level in the water collection well 8 can be identified by a water level sensor, and the identification information is transmitted to the control terminal 11), the control terminal 11 controls the electric three-way ball valve 7 to perform action one (i.e., the downcomer hose 6 is connected to the water collection well 8), and at the same time controls the submersible pump 9 to be closed, and water flows from the downcomer hose 6 to the water collection well 8. When the water level of the water collection well 8 reaches the preset value two, the control terminal 11 controls the electric three-way ball valve 7 to perform action two (i.e., the upcomer hose 5 is connected to the upcomer inlet of the submersible pump 9), and at the same time controls the submersible pump 9 to be turned on, and the water pumped by the submersible pump 9 enters the PVC watering pipe 2 from the upcomer hose 5.

[0030] Embodiment five: In the present application, before the formal municipal pipeline backfill construction is carried out, a test section for the municipal pipeline backfill construction is established based on steps S1 to S6, and the working time of the high-frequency vibrator 1-4, the working frequency of the high-frequency vibrator 1-4, and the amount of water spraying are used as research variables to carry out a municipal pipeline backfill experiment. For example, different construction times are used in sections to carry out vibration saturation watertight construction, and the density of the backfill material at different depths under different construction time conditions is determined by the water irrigation method. For example, different working frequencies are used in sections to carry out vibration saturation watertight construction, etc., and the test results are summarized, the best experimental value or change value of the research variable is selected, and the best experimental value or change value is imported into the control terminal 11, so as to achieve precise control of the subsequent formal municipal pipeline backfill construction through the control terminal 11.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A municipal pipeline backfill construction system, characterized in that: The invention comprises a concrete cushion layer (12), wherein a pipe (14) is installed at the upper end of the concrete cushion layer (12) via a concrete base (12-1), wherein the pipe (14) is buried in a backfill layer (13), wherein one end of the backfill layer (13) is provided with an inclined surface structure, wherein the upper end surface of the backfill layer (13) is provided with a vibration compaction device (1), wherein the inclined surface end of the backfill layer (13) is provided with a concrete pressure plate (3), wherein the upper end of the vibration compaction device (1) is supported by a PVC watering pipe (2) via a bracket (4), wherein the PVC watering pipe (2) is connected to an electric three-way ball valve (7) via a water supply hose (5), wherein the electric three-way ball valve (7) is further connected to a submersible pump (9) and a water discharge hose (6), and wherein the vibration compaction device (1), the electric three-way ball valve (7) and the submersible pump (9) are all electrically connected to a control terminal (11) via cables.

2. A municipal pipeline backfill construction system according to claim 1, characterized in that: An inverted filter layer is laid on the upper end surface of the concrete cushion layer (12), a water collection well (8) is provided below one side end of the inverted filter layer, and the submersible pump (9) is located in the water collection well (8).

3. A municipal pipeline backfill construction system according to claim 2, characterized in that: The filter layer is provided with a first stone layer (10-1) composed of crushed stones or pebbles with a particle size of 30 to 40 mm, a second stone layer (10-2) composed of crushed stones or pebbles with a particle size of 5 to 10 mm, and a geotextile (10-3) in sequence from top to bottom.

4. A municipal pipeline backfill construction system according to claim 1, characterized in that: The vibratory compaction device (1) comprises a steel shell (1-1), the bottom surface of the steel shell (1-1) being connected to a high-frequency vibrator sealed box (1-3) with a top plate via a sealed box base, a high-frequency vibrator (1-4) being installed in the high-frequency vibrator sealed box (1-3), and a space between the high-frequency vibrator sealed box (1-3) and the steel shell (1-1) being filled with a concrete filling body (1-2).

5. A municipal pipeline backfill construction system according to claim 4, characterized in that: The upper ends of the vibrating compaction device (1) and the concrete pressing plate (3) are symmetrically provided with two lifting ears (1-5) and two lifting ears (3-1), respectively; the bottom surface of the steel shell (1-1) is provided with a plurality of water leakage holes; and the concrete filling body (1-2) is a permeable concrete with a porosity of not less than 25%.

6. A municipal pipeline backfill construction system according to claim 1, characterized in that: The bottom of the PVC watering pipe (2) is provided with a plurality of groups of water permeable holes (2-1), each group of the water permeable holes (2-1) being arranged in a plum blossom shape, the water inlet end of the PVC watering pipe (2) is provided with a water supply electric valve (2-2), the rear side of the water supply electric valve (2-2) is provided with a flow meter, and the water supply electric valve (2-2) and the flow meter are both electrically connected to the control terminal (11).

7. A municipal pipeline backfill construction system according to claim 1, characterized in that: The backfill material in the backfill layer (13) is medium-coarse sand or stone chips.

8. A construction method of a municipal pipeline backfill construction system according to any one of claims 1 to 7, characterized in that: The steps include: S1, excavating a pipeline trench, pouring the concrete cushion layer (12), then pouring the concrete base (12-1) and placing the pipeline (14); S2, laying the water filtration layer on both sides of the concrete base (12-1); S3, loosely spread the backfill material in layers around the pipeline until it reaches a height equal to the design height multiplied by the loose spreading coefficient, scrape the unbackfilled end into an inclined surface, and hoist the concrete pressure plate (3) to place it on the inclined surface; S4, hoisting a number of the vibrating compaction devices (1) according to the construction length and placing them on the top surface of the backfill layer (13), placing a bracket (4) on each vibrating compaction device (1), and placing a PVC watering pipe (2) on the bracket (4); S5, excavating a water collection pit, placing the water collection pit (8) and the submersible pump (9), installing the electric three-way ball valve (7), the water supply hose (5) and the water discharge hose (6), and connecting the electric three-way ball valve (7) to the submersible pump (9), the water supply hose (5) and the water discharge hose (6), respectively; S6. The vibrating compacting device (1), the electric three-way ball valve (7), the submersible pump (9), the water supply electric valve (2-2), and the flow meter are electrically connected to the control terminal (11) via cables, and the control terminal (11) is started to control the compaction operation process of the backfill layer (13). Water first flows from the water discharge hose (6) to the water collection well (8). After the submersible pump (9) is automatically started, water enters the PVC watering pipe (2) from the water supply hose (5), and is dispersed to the area to be compacted through the water permeable hole (2-1) and the vibrating compacting device (1). The vibrating compacting device (1) starts to vibrate. After the water penetrates into the backfill material, combined with the influence of pressure and vibration, the backfill material gradually becomes dense. The infiltrated water passes through the water filtration layer and re-enters the water collection well (8) for recycling.

9. A municipal pipeline backfill construction method according to claim 8, characterized in that: When the water level of the water collection well (8) is lower than a preset value one, the control terminal (11) controls the electric three-way ball valve (7) to perform action one and controls the submersible pump (9) to be closed, so that water flows from the lower water hose (6) into the water collection well (8). When the water level of the water collection well (8) reaches a preset value two, the control terminal (11) controls the electric three-way ball valve (7) to perform action two and controls the submersible pump (9) to be opened, so that water pumped by the submersible pump (9) enters the PVC watering pipe (2) through the upper water hose (5).

10. A municipal pipeline backfill construction method according to claim 8, characterized in that: Before the municipal pipeline backfill construction is officially carried out, a test section for the municipal pipeline backfill construction is established based on steps S1 to S6, and a municipal pipeline backfill experiment is carried out with the working time of the high-frequency vibrator (1-4), the working frequency of the high-frequency vibrator (1-4), and the water spraying amount as research variables. The test results are summarized, and the best experimental value or change value of the research variable is selected, and the best experimental value or change value is imported into the control terminal (11).

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