Waste soil liquid solidified soil manufacturing system

Abstract

The utility model relates to a spoil liquid solidified soil manufacturing system which comprises a spoil pretreatment system, a slurry stirring system, a curing agent slurry manufacturing system and a mixing and stirring system, the spoil subjected to primary sorting and secondary screening is conveyed into the primary powerful stirring box, the primary powerful stirring box is connected with the secondary fine adjustment stirring box, the secondary fine adjustment stirring box is connected with the mixing and stirring system, the curing agent slurry preparation system is connected with the mixing and stirring system, and the mixing and stirring system is used for mixing and stirring spoil and curing agent slurry. The utility model has the advantages that the prepared spoil liquid solidified soil has good fluidity, can meet the requirement of long-distance transportation, and has the characteristics of self-compaction, early strength, seepage prevention, economy and environmental protection; 2) the prepared spoil liquid solidified soil is low in dry shrinkage rate, good in uniformity and stability, green and environment-friendly, and 3) the preparation process is simple and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid solidified soil for abandoned soil, in particular to a system for making liquid solidified soil for abandoned soil. Background Art

[0002] Liquid solidified soil from abandoned soil refers to a self-leveling, self-compacting, and pouring engineering material that can be transported by a mud pump after a certain proportion of special mud solidifier is directly added to the engineering waste mud and stirred by special machinery (abandoned slag can also be used to stir into mud by adding water). Liquid solidified soil from abandoned soil is a low-strength geotechnical engineering material with controllable quality. It can be used as a backfill and filling material for foundation trenches, fertilizer trenches, deep and shallow foundation junctions, room core backfill, extra-long retaining wall backfill, semi-enclosed spaces, basement roofs, trenches, pipelines, road bases, cushions, subsidence areas, goafs, and caves. How to make liquid solidified soil from abandoned soil that is cheap, meets requirements, has reliable engineering quality, is in sufficient supply, makes full use of on-site abandoned soil, and is environmentally friendly is an urgent problem to be solved. Summary of the invention

[0003] The purpose of the utility model is to provide a system for producing liquid solidified soil for abandoned soil in accordance with the above-mentioned deficiencies of the prior art. The system realizes the premixing of liquid solidified soil for abandoned soil by reasonably configuring the abandoned soil pretreatment system, the mud mixing system, the curing agent slurry making system and the mixing and stirring system. The liquid solidified soil for abandoned soil has the characteristics of uniformity, stability, early strength, impermeability and environmental protection, is simple to construct and inexpensive, and can also make maximum use of the abandoned soil excavated by the project itself, thereby solving the problem of difficult disposal of abandoned soil.

[0004] The purpose of this utility model is achieved by the following technical solutions:

[0005] A system for making liquid solidified soil from abandoned soil, characterized in that it includes an abandoned soil pretreatment system, a mud stirring system, a curing agent slurry making system and a mixing and stirring system, wherein the abandoned soil pretreatment system is connected to a first-level high-power stirring box of the mud stirring system, the abandoned soil after first-level sorting and second-level screening is transported to the first-level high-power stirring box, the first-level high-power stirring box is connected to a second-level fine-tuning stirring box, the second-level fine-tuning stirring box is connected to the mixing and stirring system, the curing agent slurry making system is connected to the mixing and stirring system, and the mixing and stirring system is used to mix and stir the abandoned soil with the curing agent slurry.

[0006] The first-level high-power stirring box and the second-level fine-tuning stirring box are respectively provided with a stirring head and a filter screen; the first-level high-power stirring box is connected to the water tank through a mud pump.

[0007] A specific gravity monitoring system is arranged in the secondary fine-tuning mixing box.

[0008] The curing agent slurry production system comprises a silo and a stirring barrel, a stirring head is arranged inside the stirring barrel, and the stirring barrel is connected to the mixing and stirring tank of the mixing and stirring system through a mud pump.

[0009] A weighing system is arranged in the stirring barrel, and the stirring barrel is connected with a water tank of the mud stirring system through a mud pump.

[0010] The mixing and stirring system comprises a mud storage tank and a mixing and stirring tank, which are connected via a mud pump.

[0011] The mud storage tank is provided with a weighing system; and the mixing and stirring tank is provided with a stirring head.

[0012] The spoil pretreatment system includes an excavator, a screening bucket, a conveyor belt and a spoil weighing system. The excavator performs primary sorting on the spoil, the screening bucket performs secondary screening on the spoil, and the conveyor belt is used to transport the spoil that has undergone primary sorting and secondary screening to the mud mixing system.

[0013] The advantages of the utility model are:

[0014] 1) The prepared liquid solidified soil has good fluidity, can meet the requirements of long-distance transportation, and has the characteristics of self-compacting, early strength, anti-seepage, economy and environmental protection;

[0015] 2) The prepared liquid solidified soil has low shrinkage rate, good uniformity and stability, and is green and environmentally friendly;

[0016] 3) The preparation process is simple and reliable, and the prepared liquid solidified soil of abandoned soil has a wide range of adaptability and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a preparation flow chart of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0019] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by technicians in the same industry:

[0020] like Figure 1-2As shown, the marks 1-18 in the figure respectively represent: waste soil pretreatment system 1, mud mixing system 2, curing agent slurry production system 3, mixing and stirring system 4, water tank 5, first-level strong mixing box 6, strong mixing head 7, first-level filter 8, second-level fine-tuning mixing box 9, second-level filter 10, specific gravity monitoring system 11, mixing head 12, mud pump 13, mud storage tank 14, silo 15, mixing barrel 16, weighing system 17, mixing and stirring tank 18.

[0021] Example: Figure 1 and Figure 2 As shown, the spoil liquid solidified soil making system in this embodiment is mainly divided into four parts: spoil pretreatment system 1, mud stirring system 2, solidifying agent slurry making system 3, and mixing and stirring system 4. Among them, the spoil pretreatment system 1 is used for pretreatment of the spoil by primary sorting and secondary screening, the mud stirring system 2 is used for liquefying the spoil, the solidifying agent slurry making system 3 is used for preparing solidifying agent slurry, and the mixing and stirring system 4 is used for mixing and stirring the liquefied spoil with the prepared solidifying agent slurry to make liquid solidified soil.

[0022] In this embodiment, the spoil pretreatment system 1 is composed of an excavator, a screening bucket, a conveyor belt, and a spoil weighing system. The excavator performs preliminary sorting of the spoil, the screening bucket performs secondary screening of the spoil, the conveyor belt transports the spoil to the mud mixing system 2, and the spoil weighing system is used to accurately weigh the transported spoil.

[0023] The mud mixing system 2 is composed of a water tank 5, a first-level strong mixing tank 6, a first-level filter 8, a second-level fine-adjusting mixing tank 9, a second-level filter 10, and a mud pump 13. The first-level strong mixing tank 6 includes a strong mixing head 7; the second-level fine-adjusting mixing tank 9 includes a mixing head 12 and a specific gravity monitoring system 11.

[0024] The water tank 5 delivers a predetermined amount of water to the first-level powerful stirring box 6, and the waste soil pretreatment system 1 delivers a predetermined amount of waste soil to the first-level powerful stirring box 6. The powerful stirring head 7 in the first-level powerful stirring box 6 forcibly stirs the waste soil to form a primary stirring soil slurry, which flows through the first-level filter screen 8 to the second-level fine-tuning stirring box 9. According to the specific gravity monitoring system 11 monitoring the specific gravity of the soil slurry, water is automatically added and stirred through the stirring head 12 to make the soil slurry reach a predetermined specific gravity; the soil slurry with a predetermined specific gravity is delivered to the mixing and stirring system 4 through the mud pump 13.

[0025] The curing agent slurry production system 3 comprises a silo 15, a mixing barrel 16, and a weighing system 17. The silo 15 is used to store the curing agent, and the weighing system 17 weighs water and curing agent according to a predetermined water-binder ratio, and transports them to the mixing barrel 16 and is stirred evenly by the stirring head 12 to form the curing agent slurry.

[0026] The mixing and stirring system 4 comprises a mud storage tank 14, a mixing and stirring tank 18, and a stirring head 12. The mud storage tank 14 comprises a weighing system 17, which is used to weigh the soil slurry in the mud storage tank 14. The curing agent slurry and the soil slurry of a predetermined specific gravity are transported to the mixing and stirring tank 18 in a predetermined ratio, and are stirred by the stirring head 12 to form liquid solidified soil.

[0027] When this embodiment is applied, Figure 1 As shown, there are the following preparation steps:

[0028] S1. Pretreatment of spoil: In the spoil pretreatment system 1, the spoil is sorted to remove large-diameter stones, concrete blocks, steel bars, formwork, domestic garbage, etc. The solid size shall not be greater than 50mm.

[0029] In this step, the waste soil may come from the original soil and miscellaneous fill generated by foundation pit excavation, the waste mud generated by cast-in-place piles, the return slurry and cement soil generated by the construction of cement-soil mixing piles and MJS method, etc.

[0030] S2, spoil liquefaction treatment: This step is completed by the mud stirring system 2. The water tank 5 conveys a predetermined amount of water to the first-level strong stirring tank 6, and the spoil pretreatment system 1 conveys a predetermined amount of spoil to the first-level strong stirring tank 6. The strong stirring head 7 in the first-level strong stirring tank 6 forcibly stirs the spoil to form a primary stirring slurry, which flows through the first-level filter 8 to the second-level fine-tuning stirring tank 9; after being filtered by the second-level filter 10, water is automatically added and stirred by the stirring head 12 to make the soil slurry reach a predetermined specific gravity; according to the specific gravity monitoring system 11 monitoring the specific gravity of the soil slurry, the soil slurry with the predetermined specific gravity is conveyed to the mud storage tank 14 by the mud pump 13.

[0031] In this step, the solid particles in the stirred soil slurry are no larger than 20 mm. The specific gravity monitoring system 11 can be implemented by various devices and systems in the prior art.

[0032] S3, preparation of curing agent slurry: According to the preset water-binder ratio, curing agent slurry is prepared in curing agent slurry preparation system 3. Silo 15 is used to store curing agent, and weighing system 17 weighs water and curing agent according to the preset water-binder ratio, and transports them to mixing barrel 16 for uniform mixing to form curing agent slurry.

[0033] S4. Preparation of liquid solidified soil: Mud of a predetermined specific gravity and a solidifying agent slurry of a predetermined water-binder ratio are transported to the mixing and stirring tank 18 in the mixing and stirring system 4 in a certain mass ratio and stirred evenly to prepare liquid solidified soil.

[0034] In this step, the soil slurry specific gravity is predetermined according to the abandoned soil and casting scenes, and the curing agent dosage is predetermined according to the strength requirements of the solidified soil in the casting scene.

[0035] S5. Transportation and pouring of liquid solidified soil.

[0036] In this step, the transportation of liquid solidified soil is divided into long-distance transportation and short-distance transportation. Long-distance transportation uses mixer trucks, while short-distance transportation can be carried out by pumping and pouring.

[0037] In this embodiment, the unconfined compressive strength is used to represent the solidification strength of the liquid solidified soil of the abandoned soil. The determination method is as follows: a cubic test mold with a size of 70.5 mm × 70.5 mm × 70.5 mm is selected, and the test mold is poured with the liquid solidified soil of the abandoned soil. The mold is demolded after 48 hours, and the test piece is placed in a standard curing room with a temperature of 20±2°C and a relative humidity of >95% for curing for 7 days, 14 days, and 28 days, and the compressive strength of the test piece is tested using an unconfined uniaxial press.

[0038] Although the above embodiments have described the concepts and embodiments of the purpose of the utility model in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the utility model without departing from the scope of the claims, so they are not described one by one here.

Claims

1. A system for making liquid solidified soil from abandoned soil, characterized in that: The method comprises a spoil pretreatment system, a mud stirring system, a curing agent slurry production system and a mixing and stirring system, wherein the spoil pretreatment system is connected to a first-level high-power stirring box of the mud stirring system, the spoil after first-level sorting and second-level screening is transported to the first-level high-power stirring box, the first-level high-power stirring box is connected to a second-level fine-tuning stirring box, the second-level fine-tuning stirring box is connected to the mixing and stirring system, the curing agent slurry production system is connected to the mixing and stirring system, and the mixing and stirring system is used to mix the spoil with the curing agent slurry.

2. The system for making liquid solidified soil from abandoned soil according to claim 1, characterized in that: The first-level high-power stirring box and the second-level fine-tuning stirring box are respectively provided with a stirring head and a filter screen; the first-level high-power stirring box is connected to the water tank through a mud pump.

3. A system for making liquid solidified soil from spoil according to claim 1 or 2, characterized in that: A specific gravity monitoring system is arranged in the secondary fine-tuning mixing box.

4. The system for making liquid solidified soil from abandoned soil according to claim 1, characterized in that: The curing agent slurry production system comprises a silo and a stirring barrel, a stirring head is arranged inside the stirring barrel, and the stirring barrel is connected to the mixing and stirring tank of the mixing and stirring system through a mud pump.

5. The system for making liquid solidified soil from abandoned soil according to claim 4, characterized in that: A weighing system is arranged in the stirring barrel, and the stirring barrel is connected with a water tank of the mud stirring system through a mud pump.

6. The system for making liquid solidified soil from spoil according to claim 1, characterized in that: The mixing and stirring system comprises a mud storage tank and a mixing and stirring tank, which are connected via a mud pump.

7. The system for making liquid solidified soil from spoil according to claim 6, characterized in that: The mud storage tank is provided with a weighing system; and the mixing and stirring tank is provided with a stirring head.

8. The system for making liquid solidified soil from abandoned soil according to claim 1, characterized in that: The spoil pretreatment system includes an excavator, a screening bucket, a conveyor belt and a spoil weighing system. The excavator performs primary sorting on the spoil, the screening bucket performs secondary screening on the spoil, and the conveyor belt is used to transport the spoil that has undergone primary sorting and secondary screening to the mud mixing system.

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