Construction method capable of blowing sludge and solidifying sludge at same time

Abstract

The invention discloses a construction method for curing sludge while blowing sludge, which comprises the following steps of: filling sludge with two layers of film bags to form a fence for blocking sludge on the outer surface layer, and pumping floating water on the upper layer by using a sludge pump; sludge solidification is directly carried out on the reinforced area in an in-situ solidification mode, the hydraulic reclamation area is propelled from one side of the levee, and the next construction working face is fished out; curing in the cured area for 7 days, and moving the sludge curing equipment to the cured area after the strength is reached; a film bag is arranged at the solidification boundary to flush and fill the flow-state solidified soil, and sludge solidification equipment is adopted for assisting sinking to the bottom elevation + 0.22 m; carrying out in-situ solidification on the dredger-filled sludge soil in the rest area; after the in-situ curing area reaches the strength, sludge ex-situ curing construction is conducted in a layered mode, and the curing thickness of each layer is 0.8 m; and the flow-state solidified soil is constructed layer by layer in sequence to + 6.20 m. The construction process of in-situ curing and heterotopic curing is adopted, an effective construction channel and an effective construction platform are formed, and a guarantee is provided for the on-site production progress.

Description

Technical Field

[0001] The invention relates to the technical field of engineering construction, in particular to a construction method for simultaneously blowing mud and solidifying silt. Background Art

[0002] Silt solidification technology is a method of solidifying the shallow layer of soft foundation with inorganic solidifying agents. It can make full use of silt soil to form a foundation with a certain bearing capacity, and achieve the purpose of green environmental protection while improving the efficiency of silt soil treatment. This technology is widely used in some coastal areas.

[0003] At present, in land reclamation projects, artificial island construction, and marine mudflat reclamation projects, silt solidification treatment is often carried out after the blown silt reaches the design elevation. During the silt blowing stage, due to severe restrictions on construction channels and construction platforms, construction progress is often difficult to advance effectively, which directly affects the overall progress of the project. When silt blowing and silt solidification are carried out simultaneously, as the blowing elevation gradually increases, the blown silt will invade the solidification area, directly affecting the effect of silt solidification.

[0004] Therefore, in order to solve the above problems, a construction method of solidifying silt while blowing mud is provided. Summary of the Invention

[0005] The purpose of the present invention is to overcome the existing defects and provide a construction method for blowing mud and solidifying silt at the same time. The solidification area is isolated by membrane bag partition weirs and enclosures, and an in-situ solidification plus ex-situ solidification construction process is adopted to form an effective construction channel and platform, thereby providing a guarantee for the on-site production progress.

[0006] The technical solution to achieve the above purpose is:

[0007] A construction method for simultaneously blowing mud and solidifying silt, comprising:

[0008] Step S1: First, two layers of film bags are filled with sludge to form a barrier to block the outer surface sludge, and the upper floating water is pumped out with a sludge pump;

[0009] Step S2: Use in-situ solidification to directly solidify the silt in the reinforced area, starting from one side of the levee and moving towards the fill area to quickly establish the next construction working surface;

[0010] Step S3, curing the solidified area for 7 days, and moving the sludge solidification equipment to the solidified area after the strength is reached;

[0011] Step S4: film bags are set at the solidification boundary to flush the fluidized solidified soil, and silt solidification equipment is used to assist in sinking it to the bottom elevation +0.22m;

[0012] Step S5, in-situ solidification of the remaining area's dredger-filled silt soil;

[0013] Step S6: After the in-situ solidification area reaches the required strength, ex-situ solidification of the sludge is carried out in layers, with each layer having a solidification thickness of 0.8 m.

[0014] Step S7, build the fluidized solidified soil layer by layer to +6.20m, with an interval of 7 days between each layer, until the last layer is solidified;

[0015] Step S8: Fill the stones, level them, and compact them to form a temporary road, completing the construction.

[0016] Preferably, in step S1, the height of the enclosure is set according to the blowing and filling speed.

[0017] Preferably, in step S6, before the construction of each layer, wooden formwork is first supported on the side, and after the formwork is completed, fluidized solidified soil is poured. The fluidized solidified soil is formed by extracting the original blown fill silt soil and mixing it with a curing agent.

[0018] Preferably, in step S8, after the construction is completed, the range is widened to 30 meters from the axis. At this stage, the mud blowing elevation is +3.00m, the silt solidification bottom elevation is +1.90m, and the top elevation is +6.20m.

[0019] The beneficial effects of the present invention are: the present invention isolates the solidification area through membrane bag partitions and enclosures, adopts the construction process of in-situ solidification plus ex-situ solidification to form an effective construction channel and platform; solidified soil is used for widening, and the widening range is within 30 meters of the axis. The current mud blowing elevation is +3.00m, the designed silt solidification bottom elevation is +1.90m, and the top elevation is +6.20m. Local silt solidification can be carried out simultaneously during the silt blowing and filling stage to ensure the traffic requirements of the on-site construction channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a flow chart of a construction method for simultaneously blowing mud and solidifying silt according to the present invention;

[0021] Figure 2 This is a typical cross-sectional view of the inner side of the south dike widened after two layers of film bags are first filled with silt to form a barrier in the present invention;

[0022] Figure 3 The present invention adopts the in-situ solidification method to directly solidify the silt in the reinforcement area, starting from one side of the levee and advancing towards the filling area, first rushing out the typical cross-section of the widening of the inner side of the south levee for the next construction working surface;

[0023] Figure 4 This is a typical cross-sectional view of the inner widening of the south embankment in the present invention, in which film bags are set at the solidification boundary to flush the fluidized solidified soil, and silt solidification equipment is used to assist the sinking to the bottom elevation +0.22m;

[0024] Figure 5This is a typical cross-sectional view of the inner widening of the south embankment in which the remaining area of the blown-fill silt soil is solidified in situ;

[0025] Figure 6 This is a typical cross-sectional view of the inner widening of the south embankment in which, after the in-situ solidified area reaches the required strength, the silt ex-situ solidification construction is carried out in layers, with each solidified layer having a thickness of 0.8m;

[0026] Figure 7 This is a typical cross-sectional view of the inner widening of the south embankment where fluidized solidified soil is built layer by layer to +6.20m;

[0027] Figure 8 It is a typical cross-sectional view of the inner side widening of the south dike in which mud blowing and silt solidification are finally completed in the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] The present invention aims to solve the problems that during the sludge blowing and filling stage, construction progress is often difficult to advance effectively due to severe restrictions on construction channels and construction platforms, which directly affects the overall progress of the project. When sludge blowing and sludge solidification are carried out simultaneously, as the blowing elevation gradually increases, the blown filling sludge will invade the solidification area, directly affecting the effect of sludge solidification. A construction method for blowing and solidifying sludge is provided, and the specific implementation steps are as follows:

[0031] like Figure 1 As shown, a construction method for simultaneously blowing mud and solidifying silt comprises:

[0032] Step S1: First, fill the silt with two layers of film bags to form a barrier to block the outer surface silt, and use a sludge pump to pump out the upper floating water. Figure 2 shown.

[0033] In the embodiment, the height of the enclosure is set according to the filling speed.

[0034] Step S2: Use in-situ solidification to directly solidify the silt in the reinforcement area, starting from one side of the levee and moving towards the filling area, first rushing to open up the next construction working surface, such as Figure 3 shown.

[0035] Step S3: Curing in the solidified area for 7 days, and moving the sludge solidification equipment to the solidified area after reaching the strength.

[0036] Step S4: Set up film bags at the solidification boundary to flush the fluidized solidified soil, and use silt solidification equipment to assist in sinking to the bottom elevation +0.22m. Figure 4 shown.

[0037] Step S5, in-situ solidification of the remaining area of the silt fill, such as Figure 5 shown.

[0038] Step S6: After the in-situ solidification area reaches the required strength, ex-situ solidification of the sludge is carried out in layers, with each layer having a solidification thickness of 0.8 m.

[0039] In the embodiment, before the construction of each layer, wooden formwork is first supported on the side. After the formwork is completed, the fluidized solidified soil is poured. The fluidized solidified soil is formed by extracting the original blown-fill silt soil and mixing it with a curing agent.

[0040] Step S7, build the fluidized solidified soil layer by layer to +6.20m, with an interval of 7 days between each layer, until the last layer is solidified. Figure 6 、 7 shown.

[0041] Step S8: Fill the stone materials, level and compact them to form a temporary road, and complete the construction. Figure 8 As shown, the widening range is within 30 meters of the axis. At present, the mud blowing elevation is +3.00m, the silt solidification bottom elevation is +1.90m, and the top elevation is +6.20m.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A construction method for solidifying sludge while blowing sludge, characterized in that: include: Step S1: First, two layers of film bags are filled with sludge to form a barrier to block the outer surface sludge, and the upper floating water is pumped out with a sludge pump; Step S2: Use in-situ solidification to directly solidify the silt in the reinforced area, starting from one side of the levee and moving towards the fill area to quickly establish the next construction working surface; Step S3, curing the solidified area for 7 days, and moving the sludge solidification equipment to the solidified area after the strength is reached; Step S4: film bags are set at the solidification boundary to flush the fluidized solidified soil, and silt solidification equipment is used to assist in sinking it to the bottom elevation +0.22m; Step S5, in-situ solidification of the remaining area's dredger-filled silt soil; Step S6: After the in-situ solidification area reaches the required strength, ex-situ solidification of the sludge is carried out in layers, with each layer having a solidification thickness of 0.8 m. Step S7, build the fluidized solidified soil layer by layer to +6.20m, with an interval of 7 days between each layer, until the last layer is solidified; Step S8: Fill the stones, level them, and compact them to form a temporary road, completing the construction.

2. A construction method for solidifying sludge while blowing sludge according to claim 1, characterized in that: In step S1, the height of the enclosure is set according to the filling speed.

3. The construction method of blowing mud and solidifying silt according to claim 1, characterized in that: In step S6, before each layer is constructed, wooden formwork is first supported on the side. After the formwork is completed, fluidized solidified soil is poured. The fluidized solidified soil is formed by extracting the original blown-fill silt soil and mixing it with a curing agent.

4. The construction method of blowing mud and solidifying silt according to claim 1, characterized in that: In step S8, after the construction is completed, the scope is widened to 30 meters from the axis. At this stage, the mud blowing elevation is +3.00m, the silt solidification bottom elevation is +1.90m, and the top elevation is +6.20m.

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