On-site processing method and processing line of surplus soil in TRD construction method

Abstract

The TRD method residual soil on-site processing line includes a residual soil storage box, a recycled coarse aggregate storage box, a mixing device, a block making area, and a block stacking area; the residual soil storage box and the recycled coarse aggregate are connected to the feed port of the mixing device through a first conveyor belt, the discharge port of the mixing device is connected to the block making area through a second conveyor belt, and the block stacking area is arranged on one side of the block making area; a screen is arranged above the recycled coarse aggregate storage box, and the maximum diameter of the screen holes is less than 4cm; a plurality of block molds are arranged in the block making area; a ceiling is arranged in the block stacking area, and a sprinkler is arranged on the ceiling, and the sprinkler is connected to a water source through a water pipe. The advantage is that the waste residual soil and concrete blocks are used to produce cement soil blocks, turning waste into treasure, reducing external transportation, and saving part of the cost of external transportation of cement soil and concrete blocks.

Description

Technical Field

[0001] The present invention relates to the technical field of TRD construction method and construction site waste soil treatment, and specifically to an on-site processing method for waste soil of TRD construction method and a processing line thereof. Background Art

[0002] TRD method (Trench-Cutting & Re-mixing Deep Wall Method) was developed by Japan in the early 1990s. It is a complete set of equipment and construction methods that can continuously build walls in various soil layers and gravel layers. Its basic principle is to use a chain saw-type tool box to vertically insert into the stratum, and then make horizontal lateral movements. At the same time, the chain drives the tool to make up and down rotational movements, stir and mix the original soil and pour in cement slurry to form a wall of a certain thickness. Its main features are continuous wall formation, flat surface, consistent thickness, and good wall uniformity. It is mainly used in various construction projects, underground projects, bank protection projects, dams, foundation reinforcement of embankments, anti-seepage treatment, etc.

[0003] In the construction of subways, houses and other projects, a large amount of waste cement soil is generated during the continuous wall forming process of the TRD method, which is usually transported out as slag. Since cement soil needs to be naturally dried before it can be transported out, it needs to be transferred on site and a temporary soil dump needs to be set up during the period; the transportation time of slag trucks is affected by urban traffic management restrictions and the distance to the soil dump; the cost of transporting slag is relatively high. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a TRD construction method surplus soil on-site processing method and a processing line thereof which can be arranged and put into use on-site.

[0005] The present invention is achieved through the following technical solutions:

[0006] The on-site processing method of the surplus soil of the TRD construction method has the following specific steps:

[0007] S1. Build a residual soil processing line on the construction site and transport the residual soil generated by the TRD method to the processing line for storage;

[0008] S2. Collect the concrete slag on site as recycled coarse aggregate and store it in the processing line;

[0009] S3. Add water to the surplus soil and recycled coarse aggregate in a ratio of 1: (0.8-1) and stir to form a cement soil mixture;

[0010] S4. Pour the cement soil mixture into the block mold, demould it after 24 hours to obtain the finished blocks and stack them for storage.

[0011] As an improvement of the above solution, the remaining soil in S1 is stored in a remaining soil storage box of the processing line and a retarder is added.

[0012] As an improvement of the above solution, the maximum particle size of the recycled coarse aggregate in S2 is less than 4 cm.

[0013] As an improvement to the above solution, a retarder is added during the stirring process in S3.

[0014] As an improvement to the above solution, in S4, the blocks are watered and cured after being stacked and stored.

[0015] As an improvement of the above solution, the retarder is lignin sulfonate.

[0016] As an improvement to the above solution, water is piped to the treatment line through the outlet of the on-site sewage treatment device to provide treatment water.

[0017] The TRD method surplus soil on-site processing line comprises a surplus soil storage box, a recycled coarse aggregate storage box, a stirring and mixing device, a block making area, and a block stacking area; the surplus soil storage box and the recycled coarse aggregate are connected to the feed port of the stirring and mixing device through a first conveyor belt, the discharge port of the stirring and mixing device is connected to the block making area through a second conveyor belt, and the block stacking area is arranged on one side of the block making area; a screen is arranged above the recycled coarse aggregate storage box, and the maximum diameter of the screen holes is less than 4 cm; a plurality of block molds are arranged in the block making area; a ceiling is arranged in the block stacking area, and a sprinkler is arranged on the ceiling, and the sprinkler is connected to a water source through a water pipe.

[0018] As an improvement of the above scheme, the block mold includes a mold frame and a base plate. The mold frame is provided with a plurality of mold holes arranged in an array, and a plurality of support blocks are provided on the periphery of the mold holes and the end face of the mold frame; the base plate is arranged at the bottom of the mold frame and covers all the mold holes.

[0019] As an improvement of the above scheme, the interior of the recycled coarse aggregate storage box is divided into a rejection chamber and a material chamber, the screen is arranged above the material chamber with one end inclined toward the rejection chamber and fitted to the boundary of the rejection chamber and the material chamber; an inclined plate is provided at the bottom of the material chamber and below the screen, and the inclination direction of the inclined plate is opposite to the inclination direction of the screen; when concrete slag falls from above the screen and the screen rolls toward the rejection chamber, concrete slag with a diameter of less than 4 cm falls into the material chamber to form recycled coarse aggregate, and concrete slag with a diameter of more than 4 cm falls into the rejection chamber, and the concrete slag falling into the material chamber is accumulated backwards through the inclined plate, which is convenient for removal from the side of the material chamber away from the screen.

[0020] The present invention has the following beneficial effects: the processing line is set up on site, with a small footprint of about 100 square meters. It can be set up near the TRD construction wall, which is convenient for the transportation of surplus soil and concrete slag; the waste surplus soil and concrete blocks are used to produce cement soil blocks, turning waste into treasure, reducing external transportation, and saving part of the cost of external transportation of cement soil and concrete blocks. At the same time, the maintenance and construction water is filtered by sewage treatment equipment to produce reclaimed water. The purpose of saving resources and energy and green construction is achieved. The scope of use of cement soil blocks is temporary masonry such as curbstones, sedimentation tanks, water collection wells, and foundation brick molds of temporary greening roads. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a simplified plan view of the processing line of the present invention.

[0022] Figure 2 This is a structural diagram of a recycled coarse aggregate storage box.

[0023] Figure 3 This is a cross-sectional view of a block mould.

[0024] Figure 4 This is a plan view of the block mold.

[0025] Explanation of the accompanying drawings: excess soil storage box 1, recycled coarse aggregate storage box 2, stirring and mixing device 3, block making area 4, block stacking area 5, first conveyor belt 6, second conveyor belt 7, screen 8, rejection chamber 9, material chamber 10, inclined plate 11, block mold 12, mold frame 13, mold hole 14, support block 15, bottom plate 16. DETAILED DESCRIPTION

[0026] Example 1

[0027] The on-site processing method of the surplus soil of the TRD construction method has the following specific steps:

[0028] S1. Build a residual soil processing line on the construction site and transport the residual soil generated by the TRD method to the processing line for storage.

[0029] S2. Collect the concrete slag on site as recycled coarse aggregate and store it in the processing line. The maximum particle size of the recycled coarse aggregate is less than 4cm.

[0030] S3. Add water to the surplus soil and recycled coarse aggregate at a ratio of 1:0.8 and stir to form a cement soil mixture. During the stirring process, add a lignin sulfonate retarder.

[0031] S4. Pour the cement soil mixture into the block mold, demould it after 24 hours to obtain the finished blocks, stack them for storage and water curing.

[0032] The compressive strength of the blocks obtained reached 7.8Mpa.

[0033] Example 2

[0034] The on-site processing method of the surplus soil of the TRD construction method has the following specific steps:

[0035] S1. Build a residual soil processing line on the construction site and transport the residual soil generated by the TRD method to the processing line for storage.

[0036] S2. Collect the concrete slag on site as recycled coarse aggregate and store it in the processing line. The maximum particle size of the recycled coarse aggregate is less than 4cm.

[0037] S3. Add water to the surplus soil and recycled coarse aggregate in a ratio of 1:1 and stir to form a cement soil mixture. During the stirring process, a lignin sulfonate retarder is added.

[0038] S4. Pour the cement soil mixture into the block mold, demould it after 24 hours to obtain the finished blocks, stack them for storage and water curing.

[0039] The compressive strength of the blocks obtained reaches 7.5MPa.

[0040] Example 3

[0041] like Figure 1 As shown, the TRD method residual soil on-site processing line includes a residual soil storage box 1, a recycled coarse aggregate storage box 2, a mixing device 3, a block making area 4, and a block stacking area 5; the residual soil storage box 1 and the recycled coarse aggregate are connected to the feed port of the mixing device 3 through a first conveyor belt 6, and the discharge port of the mixing device 3 is connected to the block making area 4 through a second conveyor belt 7, and the block stacking area 5 is arranged on one side of the block making area 4. Figure 2 As shown, a screen 8 is provided above the recycled coarse aggregate storage box 2, and the maximum diameter of the holes of the screen 8 is less than 4 cm; the interior of the recycled coarse aggregate storage box 2 is divided into a rejection chamber 9 and a material chamber 10, and the screen 8 is provided above the material chamber 10 and one end of the screen 8 is inclined toward the rejection chamber 9 and fits the boundary between the rejection chamber 9 and the material chamber 10; an inclined plate 11 is provided at the bottom of the material chamber 10 and below the screen 8, and the inclination direction of the inclined plate 11 is opposite to the inclination direction of the screen 8; when concrete slag falls from above the screen 8 and the screen 8 rolls toward the rejection chamber 9, concrete slag with a diameter less than 4 cm falls into the material chamber 10 to form recycled coarse aggregate, and concrete slag with a diameter greater than 4 cm falls into the rejection chamber 9, and the concrete slag falling into the material chamber 10 is accumulated backwards through the inclined plate 11, so as to be conveniently taken out from the side of the material chamber 10 away from the screen 8. The block making area 4 is provided with a plurality of block molds 12, such as Figure 3 , Figure 4As shown, the block mold 12 includes a wooden mold frame 13 and a bottom plate 16. The mold frame 13 is provided with a plurality of mold holes 14 arranged in an array. A plurality of support blocks 15 are provided on the periphery of the mold holes 14 and the end surface of the mold frame 13. The support blocks 15 are used to create gaps when the block molds 12 are stacked, and to prevent mildew and rot by ventilation and drying. The bottom plate 16 is arranged at the bottom of the mold frame 13 and covers all the mold holes 14. A ceiling (not shown) is provided in the block stacking area 5, and a sprinkler head (not shown) is provided on the ceiling. The sprinkler head is connected to a water source through a water pipe, and the treatment line is piped to the treatment line through the outlet of the on-site sewage treatment device to provide treatment water.

[0042] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention should be included in the patent scope of this case.

Claims

1. The TRD method for processing surplus soil on site is characterized by: It comprises an on-site processing line for surplus soil of TRD construction method, which is arranged beside the wall of TRD construction method and comprises a surplus soil storage box, a recycled coarse aggregate storage box, a stirring and mixing device, a block making area and a block stacking area; the surplus soil storage box and the recycled coarse aggregate are connected to the feeding port of the stirring and mixing device through a first conveyor belt, the discharging port of the stirring and mixing device is connected to the block making area through a second conveyor belt, and the block stacking area is arranged on one side of the block making area; a screen is arranged above the recycled coarse aggregate storage box, and the maximum diameter of the screen holes is less than 4cm; a plurality of block molds are arranged in the block making area; a ceiling is arranged in the block stacking area, and a spray head is arranged on the ceiling, and the spray head is connected to a water source through a water pipe; the block mold comprises a mold A mold frame and a bottom plate, wherein the mold frame is provided with a plurality of mold holes arranged in an array, and a plurality of support blocks are provided on the periphery of the mold holes and the end surface of the mold frame; the bottom plate is arranged at the bottom of the mold frame and covers all the mold holes; the interior of the recycled coarse aggregate storage box is divided into a rejection chamber and a material chamber, and the screen is arranged above the material chamber and one end is inclined toward the rejection chamber and fits the boundary between the rejection chamber and the material chamber; an inclined plate is arranged at the bottom of the material chamber and below the screen, and the inclination direction of the inclined plate is opposite to that of the screen; when concrete slag falls from above the screen, while the screen rolls toward the rejection chamber, concrete slag with a diameter less than 4 cm falls into the material chamber, and concrete slag with a diameter greater than 4 cm falls into the rejection chamber, and the concrete slag falling into the material chamber is accumulated backwards through the inclined plate, so as to be conveniently taken out from the side of the material chamber away from the screen; The specific steps are as follows: S1. Build a residual soil processing line on the construction site and transport the residual soil generated by the TRD method to the processing line for storage; S2. Collect the concrete slag on site as recycled coarse aggregate and store it in the processing line; S3. Add water to the surplus soil and recycled coarse aggregate in a ratio of 1: (0.8-1) and stir to form a cement soil mixture; S4. The cement soil mixture is poured into the block mold, and the finished blocks are demoulded and stacked for storage after 24 hours; the remaining soil in S1 is stored in the remaining soil storage box of the processing line and a retarder is added; In S3, a retarder is added during the mixing process; The retarder is lignin sulfonate.

2. The on-site processing method for excess soil in TRD construction method according to claim 1 is characterized in that: The maximum particle size of recycled coarse aggregate in S2 is less than 4 cm.

3. The on-site processing method for surplus soil in TRD construction method according to claim 1 is characterized in that: In S4, the blocks are stacked and stored and then watered for curing.

4. The method for processing surplus soil on site according to any one of claims 1 to 3, characterized in that: Water is piped through the outlet of the on-site sewage treatment plant to the treatment line to provide water for treatment.

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