Recovery soil applied to nondestructive reinforcement of kiln site stratum and use method of recovery soil

Abstract

The invention relates to restored soil applied to nondestructive reinforcement of a kiln ruins stratum and a use method of the restored soil. The restored soil comprises the following components in percentage by mass (kg / m < 3 >): 50% of Jingdezhen local red soil particles, 40% of water and 10% of a special mineral-based curing material, the main component of the special mineral-based curing material is superfine slag powder containing SiO2, Fe2O3, Al2O3, MgO and CaO, and the color of hardened soil is not affected after the special mineral-based curing material is added into the soil slurry. The method comprises the steps of (1) wall body pretreatment, (2) hole leading and slag removal, (3) kiln site restoration soil preparation, (4) kiln site restoration soil injection, (5) kiln site restoration soil maintenance and (6) compactness and bearing capacity detection on a reinforced foundation. The miscellaneous fill of the original stratum is replaced by the restored soil, so that the purposes of original appearance protection and lossless reinforcement of the kiln ruin stratum are achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building construction, and particularly relates to a recovered soil for non-destructive reinforcement of kiln site strata and a use method thereof. BACKGROUND

[0002] In Jingdezhen, Jiangxi, China, there are unique kiln site strata, which are miscellaneous fill formed by waste materials generated in the process of ceramic production filled in the ground, usually being clay-wrapped broken pottery, broken porcelain, broken bricks, broken tiles, etc., with a size of up to 20 cm or more, as shown in FIG. 1. Figure 1 After thousands of years of accumulation, the thickness of the stratum can reach nearly 10 m.

[0003] Geological survey results show that the structure of the stratum has the characteristics of high void ratio, large unconformity, strong permeability, and loose and compressible. Therefore, the masonry structure building located thereon has shown significant uneven settlement and wall tilting and other diseases after hundreds of years of use. Under the background of the world intangible cultural heritage declaration of the hand-made porcelain industry in Jingdezhen, it is urgent to protect and reinforce the above-mentioned site.

[0004] However, it should be noted that a large number of porcelain pieces of different ages in the kiln site stratum form a unique sequence, record the development track of the Jingdezhen ceramic industry, and have rich historical and cultural value, and it itself is also part of the historical and cultural heritage. Therefore, the stratum reinforcement method needs to meet the principles of "not changing the original state", "minimum intervention" and "reversibility" of cultural relic protection. For such loose miscellaneous fill stratum, the most effective reinforcement means is grouting method. However, the conventional cement grouting reinforcement has the disadvantages of inconsistent material properties of cement with the original soil, too high reinforcement strength leading to irreversible reinforcement behavior, etc., which causes damage to the kiln site stratum, does not comply with the concept of cultural relic protection, and cannot be applied in such stratum.

[0005] Therefore, how to provide a recovered soil for non-destructive reinforcement of kiln site strata and a use method thereof is a technical problem that those skilled in the art need to solve urgently. SUMMARY

[0006] The application provides a recovered soil for non-destructive reinforcement of kiln site strata and a use method thereof. The main components and color of the recovered soil are consistent with the local soil in Jingdezhen, but the fluidity and hardening strength are adjustable. The miscellaneous fill of the original stratum is replaced, the compactness of the foundation is enhanced, and the bearing capacity of the stratum is improved, so that the purpose of original appearance protection and non-destructive reinforcement of the kiln site stratum is achieved.

[0007] To solve the above technical problems, the application includes the following technical solutions:

[0008] A kind of restoration soil applied to kiln industry site stratum non-destructive reinforcement, the components of the restoration soil are as follows by mass ratio (kg / m 3 ):

[0009] 50% of Jingdezhen local red soil particles, 40% of water, 10% of special mineral-based curing material;The main component of the special mineral-based curing material is slag powder containing SiO2, Fe2O3, Al2O3, MgO and CaO, which is close to the main component of Jingdezhen local red soil, and the color of the hardened soil is not affected after adding the special mineral-based curing material to the soil slurry.

[0010] The application also provides a use method of the restoration soil applied to kiln industry site stratum non-destructive reinforcement, which comprises the following steps:

[0011] Step S1, wall pretreatment: when the original wall is severely inclined, temporary support is first performed, and temporary plugging is performed on the damaged part of the wall if necessary, to ensure the stability of the whole wall during the reinforcement process;

[0012] Step S2, hole leading and slag cleaning: hole leading equipment is used to drill holes within the range specified in the scheme, and clean water is injected every 0.5 m during the drilling process to clean the slag and open the grouting path;

[0013] Step S3, preparation of the restoration soil for kiln industry site stratum non-destructive reinforcement according to claim 1: the formula amount of Jingdezhen local red soil particles, special curing material and water are sequentially put into a stirring barrel, and fully stirred to prepare a restoration soil slurry for standby;

[0014] Step S4, injection of kiln industry site restoration soil: start the grouting equipment, inject the prepared restoration soil slurry into the kiln industry accumulation layer foundation, and when the total amount of slurry injection reaches the preset requirement at a certain depth, pull out the grouting pipe by 0.5 m, continue to inject, and repeat the above process until the ground appears obvious slurry, and then stop;

[0015] Step S5, maintenance of kiln industry site restoration soil: after the injection is completed, the grouting pipe is pulled out, and the reinforced range is statically maintained for about 24-48 hours, so that the soil can be initially hardened, and the design use strength can be reached after 7 days.

[0016] Step S6, the compactness and bearing capacity of the reinforced foundation are detected by the way of exploration trench or coring, to ensure the construction quality.

[0017] Further, the preparation process of the restoration soil in step S3 is as follows: the formula amount of red soil particles is put into a stirring barrel and fully stirred for about 3 minutes;Then the formula amount of special curing material is put into the stirring barrel and fully stirred for about 3 minutes;Then the formula amount of water is put into the stirring barrel and fully stirred for about 5 minutes, to obtain the restoration soil slurry.

[0018] Furthermore, step S4 also includes: first grouting closer to the historical masonry and then grouting farther away, with the grouting pressure closer to the historical masonry being lower and the grouting pressure farther away being higher, grouting in alternate holes, and appropriately adjusting according to changes in the stratum, with the flow rate of the restoration soil slurry being 10 to 20 L / min.

[0019] Furthermore, the compressive strength of the restored soil is 1-1.5 MPa, the fluidity is 160-200 mm, the shrinkage rate is less than 0.1%, and the setting time is 2-3 hours.

[0020] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0021] The present invention provides a restoration soil for non-destructive reinforcement of kiln ruins and a method for using the restoration soil. The main components and color of the restoration soil are consistent with the local soil in Jingdezhen, but the fluidity and hardening strength are adjustable. The restoration soil is used to replace the miscellaneous fill soil of the original stratum, enhance the density of the foundation, and thus improve the bearing capacity of the stratum, thereby achieving the purpose of protecting the original appearance of the kiln ruins and non-destructive reinforcement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the stratigraphic layers of a typical kiln site;

[0023] Figure 2 This is a schematic diagram of step S2 in a method for using restored soil for non-destructive reinforcement of kiln ruins strata according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of step S4 in a method for using restored soil for non-destructive reinforcement of kiln ruins strata according to an embodiment of the present invention;

[0025] Figure 4 Schematic diagram of step S5 in a method for using restored soil for non-destructive reinforcement of kiln ruins strata according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following is a further detailed description of a restoration soil for non-destructive reinforcement of kiln ruins and its use method provided by the present invention in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description.

[0027] Example 1

[0028] The following combination Figures 2 to 4 , and describes in detail the restoration soil used for non-destructive reinforcement of kiln ruins strata and its use method of the present invention.

[0029] A restoration soil for non-destructive reinforcement of kiln ruins, wherein the components of the restoration soil are in the mass ratio of (kg / m 3 ):

[0030] Jingdezhen local red soil particles 50%, water 40%, special mineral-based curing material 10%; the main component of the special mineral-based curing material is slag powder containing SiO2, Fe2O3, Al2O3, MgO and CaO, which is close to the main component of the local red soil in Jingdezhen, and does not affect the color of the hardened soil after adding the special mineral-based curing material to the soil slurry.

[0031] The embodiment also provides a use method of the recovered soil applied to non-destructive reinforcement of kiln site stratum, which comprises the following steps:

[0032] Step S1, wall pretreatment: when the original wall is severely inclined, temporary support is first performed, and temporary plugging is performed on the damaged part of the wall if necessary, so as to ensure the stability of the whole wall during the reinforcement process;

[0033] Step S2, hole drilling and slag cleaning: small hole drilling equipment is used to drill holes within the range specified in the scheme, and clean water is injected every 0.5 m during the drilling process to clean the slag and punch the grouting path;

[0034] Step S3, preparation of the recovered soil for non-destructive reinforcement of kiln site stratum: the formula amount of Jingdezhen local red soil particles, special curing material and water are put into a stirring barrel in steps, and are fully stirred to prepare the recovered soil slurry for standby;

[0035] Step S4, injection of the recovered soil for kiln site: the prepared recovered soil slurry is injected into the kiln accumulation layer foundation by starting the grouting equipment, and when the total amount of the slurry injected to a certain depth reaches the preset requirement, the grouting pipe is pulled out by 0.5 m, the injection is continued, and the above process is repeated until the ground appears obvious slurry, and then the injection is stopped;

[0036] Step S5, curing of the recovered soil for kiln site: after the injection is completed, the grouting pipe is pulled out, and the reinforced range is cured statically for about 24-48 hours, so that the recovered soil is preliminarily hardened, and the design use strength can be reached after 7 days;

[0037] Step S6, the compactness and bearing capacity of the reinforced foundation are detected by the way of exploration trench or coring, so as to ensure the construction quality.

[0038] In the embodiment, more preferably, the preparation process of the recovered soil in step S3 is that the formula amount of red soil particles is put into a stirring barrel and fully stirred for about 3 minutes, then the formula amount of special curing material is put into the stirring barrel and fully stirred for about 3 minutes, and then the formula amount of water is put into the stirring barrel and fully stirred for about 5 minutes, so that the recovered soil slurry is obtained.

[0039] In the embodiment, more preferably, the step S4 further comprises: adopting a grouting sequence of first grouting the historical masonry nearby, then grouting the historical masonry far away, grouting pressure being smaller near the historical masonry and grouting pressure being larger far away, hole-by-hole grouting, and appropriately adjusting according to stratum variation, the flow rate of the recovered soil slurry being 10-20 L / min.

[0040] In the embodiment, more preferably, the fluidity of the slurry can be adjusted by changing the water mixing amount, and the hardening time and final strength of the slurry can be adjusted by changing the mixing amount of the special curing material. In the case of the ratio of soil: water: curing material = 5:4:1, the compressive strength of the recovered soil is 1-1.5 MPa (referring to "Cement Mortar Strength Test Method - GB / T 17671-1999"), the fluidity is 160-200 mm (referring to "Technical Specification for Bubble Mixed Light Soil Filling Engineering (CJJ T 177-2012)"), the shrinkage rate is <0.1% (referring to "Cement Mortar Shrinkage Test Method - GC / T 603-2004"), the setting time is 2-3 hours (referring to "Cement Mortar Shrinkage Test Method - GC / T 603-2004"), and good injection fluidity and early strength time can be achieved, which is a more suitable ratio range.

[0041] The above embodiments are preferred embodiments of the present application, but the embodiments of the present application are not limited by the above embodiments. The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which are within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A restoration soil used for non-destructive reinforcement of kiln ruins, characterized in that: The mass ratio of the components of the restored soil is (kg / m 3 ): 50% Jingdezhen local red soil particles, 40% water, and 10% special mineral-based curing material; the special mineral-based curing material is mainly composed of slag powder containing SiO2, Fe2O3, Al2O3, MgO, and CaO, and its main components are similar to the local red soil of Jingdezhen. After adding the special mineral-based curing material to the soil mud, it does not affect the color of the hardened soil.

2. A method for using restored soil for non-destructive reinforcement of kiln ruins, characterized in that: The steps include: Step S1, wall pretreatment: If the original wall is severely tilted, temporary support is first provided. If necessary, the damaged part of the wall is temporarily blocked to ensure the stability of the entire wall during the reinforcement process; Step S2, drilling and slag removal: using drilling equipment, drilling within the range specified in the plan, injecting clean water every 0.5m during the drilling process to remove slag and open up the grouting path; Step S3, preparing the restoration soil for non-destructive reinforcement of the kiln ruins stratum according to claim 1: adding the formulated amount of Jingdezhen local red soil particles, special solidifying materials and water into a mixing bucket, stirring them thoroughly to prepare a restoration soil slurry for later use; Step S4, injection of restoration soil for the kiln ruins: Start the grouting equipment and inject the prepared restoration soil slurry into the foundation of the kiln accumulation layer. When the total amount of slurry injected at a certain depth reaches the preset requirement, pull the grouting pipe up 0.5m and continue injection. Repeat the above process until obvious slurry appears on the ground. Step S5, curing of the kiln ruins restoration soil: After the injection is completed, the grouting pipe is pulled out and the reinforced area is statically cured for about 24 to 48 hours to achieve initial hardening. After 7 days, the designed service strength can be reached; Step S6: Conduct density and bearing capacity tests on the reinforced foundation by trenching or coring to ensure construction quality.

3. The method of use according to claim 2, characterized in that: The preparation process of the restored soil in step S3 is as follows: a formulated amount of red soil particles is put into a stirring bucket and stirred thoroughly for about 3 minutes; then a formulated amount of special curing material is put into the stirring bucket and stirred thoroughly for about 3 minutes; and then a formulated amount of water is put into the stirring bucket and stirred thoroughly for about 5 minutes to obtain the restored soil slurry.

4. The method of use according to claim 2, characterized in that: The step S4 also includes: first grouting closer to the historical masonry and then grouting farther away, with the grouting pressure closer to the historical masonry being lower and the grouting pressure farther away being higher, grouting in alternate holes, and appropriately adjusting according to changes in the stratum, with the flow rate of the restoration soil slurry being 10 to 20 L / min.

5. The method of use according to claim 4, characterized in that: The compressive strength of the restored soil is 1-1.5 MPa, the fluidity is 160-200 mm, the shrinkage rate is less than 0.1%, and the setting time is 2-3 hours.

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