Construction method for solidifying flowing silt stratum

Abstract

This invention patent relates to the technical field of pile bodies and discloses a construction method for solidifying fluid plastic silt strata. A silt solidifying agent is configured. By weight percentage, the silt solidifying agent includes 42.5P.O cement, S95-grade slag powder, gypsum, and double salt. The 42.5P.O cement, S95-grade slag powder, gypsum, and double salt are mixed and stirred in a stirrer to form the silt solidifying agent. The stirrer is connected with a delivery pipe, and the delivery pipe is equipped with a pump body. The silt solidifying agent in the stirrer is input into the silt in the silt strata by using the delivery pipe, and the silt solidifying agent is stirred and mixed with the silt to form a silt solidified layer. After the silt solidified layer stands for a set time, the silt solidified layer solidifies. In this way, compared with the silt, the solidified silt solidified layer loses fluidity and forms a certain strength, and situations such as necking and hole collapse will not occur during rotary drilling, effectively improving the hole forming quality of rotary drilling in the silt layer.

Description

Technical Field

[0001] This invention patent relates to the technical field of pile bodies, and more specifically, to a construction method for solidifying a fluid - plastic silt stratum. Background Art

[0002] With the development of cities, coastal areas have been vigorously developed. There are a large number of silt strata in a fluid - plastic state in such areas. The fluid - plastic silt has low strength and is easy to deform. On the one hand, its bearing capacity is relatively low, resulting in safety risks for large equipment such as rotary drilling rigs. On the other hand, in the process of rotary drilling for holes, problems such as necking and hole collapse are likely to occur, greatly affecting the efficiency of hole - forming construction of rotary drilling rigs.

[0003] In the prior art, rotary drilling for holes in a fluid - plastic silt stratum usually adopts a long casing in combination with mud for hole - forming. In a deep fluid - plastic silt stratum, the requirement for the verticality of the long casing is relatively high, and deviation of the hole is likely to occur. To ensure construction, the mud modulation is usually thick, which easily leads to a large mud cake thickness and difficult hole cleaning. The overall operation is complex and the hole - forming quality is poor. Summary of the Invention

[0004] The purpose of the present invention is to provide a construction method for solidifying a fluid - plastic silt stratum, aiming to solve the problem of great difficulty in rotary drilling for holes in a silt layer in the prior art.

[0005] The present invention is implemented as follows. For the construction method for solidifying a fluid - plastic silt stratum, a silt solidifying agent is configured. The silt solidifying agent includes 42.5P.O cement, S95 - grade slag micro - powder, gypsum, and a double salt; the 42.5P.O cement, S95 - grade slag micro - powder, gypsum, and double salt are mixed and stirred in a stirrer to form the silt solidifying agent;

[0006] The stirrer is connected with a delivery pipe, and the delivery pipe is provided with a pump body. The silt solidifying agent in the stirrer is input into the silt in the silt stratum by using the delivery pipe, and the silt solidifying agent is stirred and mixed with the silt to form a silt solidifying layer; after the silt solidifying layer stands for a set time, the silt solidifying layer solidifies.

[0007] Optionally, before injecting the silt solidifying agent into the silt stratum, a plurality of air delivery pipes are inserted into the silt stratum. A plurality of air holes are provided on the side wall of the air delivery pipe; the outer end of the air delivery pipe is exposed on the silt stratum, and a high - pressure air flow is injected into the air delivery pipe by using a blower, and the high - pressure air flow is output into the silt stratum through the plurality of air holes to form a plurality of bubble holes in the silt stratum.

[0008] Optionally, the bottom of the air delivery pipe is provided with a bottom opening, and a rotating ring is provided at the bottom of the air delivery pipe; the inner side of the rotating ring is sleeved on the outer circumference of the bottom of the air delivery pipe and is fixedly connected with the air delivery pipe; the outer side of the rotating ring is provided with an outer ring body arranged to rotate.

[0009] The bottom of the outer ring body is provided with a plurality of bottom blades extending downward, the bottom blades are located below the bottom opening of the gas transmission pipe, and the plurality of bottom blades are arranged at intervals along the circumferential direction of the outer ring body; along the direction from top to bottom, the bottom blades are inclined; the inner ends of the bottom blades extend towards the bottom opening of the gas transmission pipe to form inner ends, and there is an inner end interval between adjacent inner ends, and the inner end interval communicates with the bottom opening of the gas transmission pipe;

[0010] After the blower injects high-pressure air flow into the gas transmission pipe, part of the high-pressure air flow blows downward through the bottom opening and the inner end interval, and drives the plurality of bottom blades to rotate, stirring the silt at the bottom of the gas transmission pipe.

[0011] Optionally, the outer ends of the bottom blades are arranged flush with the outer circumference of the outer ring body up and down.

[0012] Optionally, the outer ring body has an outer peripheral wall arranged outward, and the outer peripheral wall is provided with a plurality of outer peripheral blades, and the plurality of outer peripheral blades are arranged at intervals along the circumferential direction of the outer ring body;

[0013] After the blower injects high-pressure air flow into the gas transmission pipe, part of the high-pressure air flow blows downward through the bottom opening and the inner end interval, driving the plurality of bottom blades and the plurality of outer peripheral blades to rotate, and the outer peripheral blades stir the silt outside the gas transmission pipe.

[0014] Optionally, the agitator includes an agitator drum, and the agitator drum has an agitation chamber; the bottom of the agitator drum has a connector, the delivery pipe is connected to the connector, and the connector controls the communication or disconnection between the delivery pipe and the agitation chamber;

[0015] During the mixing and stirring process of the silt curing agent in the agitation chamber, the connector disconnects the delivery pipe from the agitation chamber; when it is necessary to inject the silt curing agent into the silt formation through the delivery pipe, the connector connects the delivery pipe to the agitation chamber.

[0016] Optionally, the inner side wall of the agitation chamber has an airbag layer that inflates and expands or deflates and contracts, and the airbag layer is arranged in a circumferential direction around the agitation chamber; a stirring shaft that rotates longitudinally is provided in the agitation chamber, and stirring blades are provided on the outer periphery of the stirring shaft, and there is an interval between the stirring blades and the airbag layer;

[0017] The airbag layer has an air inlet and an air outlet. During the process of the stirring shaft mixing and stirring the silt curing agent in the agitation chamber, the airbag layer is alternately inflated and deflated through the air inlet and the air outlet, so that the airbag layer alternately expands and contracts, and the alternating expansion and contraction of the airbag layer drive the silt curing agent on the airbag layer to move towards the middle of the agitation chamber.

[0018] Optionally, a powerful stirring head is used to stir and mix the silt in the silt formation with the silt solidifying agent to form the silt solidified layer.

[0019] Optionally, a powerful stirring head of a mixer truck is used to mix and stir the silt solidifying agent and the silt.

[0020] The mixer truck includes a walkable vehicle body, on which a movable arm that can move in space is provided. The inner end of the movable arm is hinged to the vehicle body, and the powerful stirring head is connected to the outer end of the movable arm. The powerful stirring head includes a rotating shaft provided at the outer end of the movable arm and two longitudinally arranged stirring wheels. The rotating shaft is transversely arranged. The middle part of the rotating shaft is movably penetrated through the outer end of the movable arm, and the two stirring wheels are respectively connected to both ends of the rotating shaft and rotate along with the rotation of the rotating shaft.

[0021] The outer end of the movable arm has a cavity with an external opening, and the cavity is located between the two stirring wheels. A fixed channel is provided in the movable arm, and the fixed channel communicates with the middle part of the cavity. The delivery pipe is penetrated through the fixed channel and communicates with the cavity.

[0022] Two air channels are provided in the movable arm. The cavity has two corresponding inner peripheral side walls, and the two inner peripheral side walls are respectively located on both sides of the delivery pipe. A plurality of horizontally arranged air outlets are provided on the inner peripheral side walls, and the plurality of air outlets respectively communicate with the air channels.

[0023] When the stirring wheels rotate and stir in the silt, after the silt solidifying agent is transported to the cavity through the delivery pipe, it then falls into the silt and is mixed and stirred with the silt. At the same time, high-pressure airflows are respectively injected into the two air channels through two air blowers, and the high-pressure airflows blow towards the cavity through the plurality of air outlets, dispersing and stirring the silt solidifying agent in the cavity.

[0024] The pressures of the high-pressure airflows injected into the two air channels by the two air blowers are different, and within a set time, the pressures of the high-pressure airflows injected into the two air channels by the two air blowers alternate.

[0025] Optionally, the stirring wheel has a longitudinally arranged outer peripheral side wall, and a plurality of longitudinal blades are provided on the outer peripheral side wall. The plurality of longitudinal blades are arranged at intervals along the circumferential direction of the outer peripheral side wall.

[0026] The stirring wheel has an inner side wall facing the cavity, and a plurality of curved blades are provided on the inner side wall. The plurality of curved blades are arranged at intervals along the inner side wall. The curved blades are arranged in multiple curved sections, and a plurality of through holes are provided on the curved blades, and the through holes transversely penetrate the curved blades.

[0027] The bent blade is provided with a plurality of bent portions, and the plurality of bent portions are integrally formed. The adjacent bent portions are arranged in a bent manner, and the ends of the adjacent bent portions are butted to form a bent butt joint section. The adjacent bent portions are bent relative to the bent butt joint section; the bent butt joint section bulges towards both sides to form a thickened section, and the thickened section extends along the length direction of the bent butt joint section;

[0028] During the stirring process of the two stirring wheels, the bent blade is squeezed by the sludge and the sludge curing agent, and the bent portion reciprocally bends and deforms relative to the thickened section. At the same time, during the process of the bent portion recovering from deformation, the sludge and the sludge curing agent are stirred.

[0029] Compared with the prior art, the method for curing construction of a flowing plastic sludge formation provided by the present invention forms a sludge curing agent by mixing 42.5P.O cement, S95 grade slag powder, gypsum and double salt in a certain proportion, transports the sludge curing agent to the sludge formation through a conveying pipe, stirs and mixes and then stands for a certain time, and the sludge curing layer solidifies. Compared with the sludge, the solidified sludge curing layer loses fluidity and forms a certain strength after solidification, and necking and hole collapse will not occur during rotary drilling, effectively improving the hole forming quality of rotary drilling in the sludge formation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a sectional view of the gas transmission pipe provided by the present invention;

[0031] Figure 2 is a sectional view of the mixing drum provided by the present invention;

[0032] Figure 3 is a construction schematic diagram of the curing construction of a flowing plastic sludge formation provided by the present invention;

[0033] Figure 4 is a sectional view of the powerful stirring head provided by the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0036] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0037] Referring Figures 1-4 as shown, it is a preferred embodiment provided by the present invention.

[0038] The present invention provides a construction method for solidifying a fluidized silt stratum, configuring a silt solidifying agent, and the silt solidifying agent includes 42.5P.O cement, S95 grade slag micro-powder, gypsum, and double salt; mixing 42.5P.O cement, S95 grade slag micro-powder, gypsum, and double salt in a stirrer to form a silt solidifying agent;

[0039] The stirrer is connected with a delivery pipe 206, and the delivery pipe 206 is provided with a pump body. The silt solidifying agent in the stirrer is input into the silt in the silt stratum 100 by using the delivery pipe 206, and the silt solidifying agent is stirred and mixed with the silt to form a silt solidified layer 110; after the silt solidified layer 110 stands for a set time, the silt solidified layer 110 solidifies.

[0040] For the above-mentioned construction method for solidifying a fluidized silt stratum, compared with the silt stratum 100, the formed silt solidified layer 110 loses fluidity and forms a certain strength after solidification. When rotary drilling, there will be no situations such as necking and hole collapse, effectively improving the hole-forming quality of rotary drilling in the silt stratum.

[0041] Before injecting the silt solidifying agent into the silt stratum 100, insert a plurality of gas delivery pipes 101 into the silt stratum 100, and a plurality of air holes 102 are provided on the side wall of the gas delivery pipe 101; the outer end of the gas delivery pipe 101 is exposed on the silt stratum 100, and a high-pressure air flow is injected into the gas delivery pipe 101 by using a blower, and the high-pressure air flow is output to the silt stratum 100 through the plurality of air holes 102 to form a plurality of bubble holes in the silt stratum 100.

[0042] A plurality of bubble holes are formed. In the subsequent process, when injecting the silt solidifying agent into the silt stratum, the silt solidifying agent can pass through the plurality of bubble holes and initially spread to various parts of the silt stratum, so that the silt solidifying agent is initially mixed in the silt stratum 100.

[0043] The bottom of the gas pipeline 101 is provided with a bottom opening, and a rotating ring 103 is provided at the bottom of the gas pipeline 101; the inner side of the rotating ring 103 is sleeved on the outer periphery of the bottom of the gas pipeline 101 and is fixedly connected to the gas pipeline 101; the outer side of the rotating ring 103 is provided with an outer ring body 104 arranged to rotate;

[0044] The bottom of the outer ring body 104 is provided with a plurality of bottom blades 105 extending downward, the bottom blades 105 are located below the bottom opening of the gas pipeline 101, and the plurality of bottom blades 105 are arranged at intervals along the circumferential direction of the outer ring body 104; along the direction from top to bottom, the bottom blades 105 are arranged obliquely; the inner ends of the bottom blades 105 extend towards the bottom opening of the gas pipeline 101 to form inner ends, and there is an inner end interval between adjacent inner ends, and the inner end interval communicates with the bottom opening of the gas pipeline 101;

[0045] After the blower injects high-pressure air flow into the gas pipeline 101, part of the high-pressure air flow blows downward through the bottom opening and the inner end interval, and drives the plurality of bottom blades 105 to rotate, stirring the sludge at the bottom of the gas pipeline 101.

[0046] The rotating ring 103 is fixedly connected to the outer periphery of the bottom of the gas pipeline 101 in a sleeved manner. At the same time, the rotating ring 103 is provided with an outer ring body 104. At the bottom of the outer ring body 104, there are bottom blades 105. When high-pressure gas blows out from the bottom opening of the gas pipeline 101, most of the gas blows downward from the bottom opening, and a part of the gas can blow out from the inner end interval. These gases can drive the bottom blades 105 to rotate, and the rotating bottom blades 105 can stir the sludge at the bottom of the gas pipeline 101 and can break up large pieces of sludge.

[0047] The outer ends of the bottom blades 105 are arranged flush with the outer periphery of the outer ring body 104 up and down. In this way, the outer ends of the bottom blades 105 are connected to the outer periphery of the outer ring body 104 and are arranged flush with the outer periphery of the outer ring body 104 up and down, so that the inner end interval communicates with the bottom opening of the gas pipeline 101, and the high-pressure gas blown out from the bottom opening can blow out through the inner end interval.

[0048] The outer ring body 104 has an outer peripheral wall arranged outward, and the outer peripheral wall is provided with a plurality of outer peripheral blades 106, and the plurality of outer peripheral blades 106 are arranged at intervals along the circumferential direction of the outer ring body 104;

[0049] After the blower injects high-pressure air flow into the gas pipeline 101, part of the high-pressure air flow blows downward through the bottom opening and the inner end interval, driving the plurality of bottom blades 105 and the plurality of outer peripheral blades 106 to rotate, and the outer peripheral blades 106 stir the sludge outside the gas pipeline 101.

[0050] In this way, the high-pressure gas can be blown downward through the bottom opening and the inner-end interval. Blocked by the soil body, part of the gas is blown to the outer peripheral blades 106. At the same time, the high-pressure gas can also be blown up through the multiple pores 102 on the side wall of the gas delivery pipe 101. This part of the high-pressure gas can also drive the outer peripheral blades 106 to rotate rapidly, stirring the silt outside the gas delivery pipe 101, and can disperse the silt, facilitating the mixing of the silt solidifying agent and the silt in the subsequent process.

[0051] The stirrer includes a stirring cylinder 200, and a stirring chamber 201 is provided in the stirring cylinder 200; a connector 202 is provided at the bottom of the stirring cylinder 200, and a delivery pipe 206 is connected to the connector 202, and the connector controls the communication or disconnection between the delivery pipe 206 and the stirring chamber 201;

[0052] During the mixing and stirring of the silt solidifying agent in the stirring chamber 201, the connector 202 disconnects the delivery pipe 206 from the stirring chamber 201; when it is necessary to inject the silt solidifying agent into the silt formation 100 through the delivery pipe 206, the connector 202 connects the delivery pipe 206 to the stirring chamber 201.

[0053] In the stirring cylinder 200, 42.5P.O cement, S95 grade slag powder, gypsum and double salt are mixed and stirred in a certain proportion to form a silt solidifying agent. Then the connector 202 is opened to connect the stirring chamber 201 with the delivery pipe 206, and the silt solidifying agent is transported to the silt formation 100 through the delivery pipe 206.

[0054] An airbag layer 203 that can be inflated and expanded or deflated and contracted is provided on the inner side wall of the stirring chamber 201, and the airbag layer 203 is arranged circumferentially around the stirring chamber 201; a stirring shaft 204 that is longitudinally rotatably arranged is provided in the stirring chamber 201, stirring blades 205 are provided on the outer periphery of the stirring shaft 204, and there is a gap between the stirring blades 205 and the airbag layer 203;

[0055] The airbag layer 203 has an air inlet 207 and an air outlet 208. During the process of the stirring shaft 204 mixing and stirring the silt solidifying agent in the stirring chamber 201, inflation and deflation are alternately carried out through the air inlet 207 and the air outlet 208, so that the airbag layer 203 alternately expands and contracts. The alternating expansion and contraction of the airbag layer 203 drives the silt solidifying agent on the airbag layer 203 to move towards the middle of the stirring chamber 201.

[0056] In this way, through the stirring effect of the stirring shaft 204, the various components of the silt solidifying agent can be quickly and evenly mixed. At the same time, an airbag layer 203 is provided on the inner side wall of the stirring chamber 201. Through inflation and deflation, the airbag layer 203 alternately expands and contracts, driving the silt solidifying agent on the airbag layer 203 to move towards the middle of the stirring chamber 201, improving the fluidity of the mixed liquid in the stirring chamber 201, enabling the mixed liquid to be evenly mixed, and forming a silt solidifying agent.

[0057] The sludge in the sludge formation is stirred and mixed with the sludge solidifying agent by using the powerful stirring head 302 to form a sludge solidified layer 110. In this way, the stirring head is inserted into the sludge formation, and the sludge and the sludge solidifying agent are fully stirred to ensure that the sludge solidifying agent and the sludge are evenly mixed, avoiding inconsistent solidification strengths in different parts of the sludge solidified layer 110, so that the overall sludge solidified layer 110 can reach the set solidification strength.

[0058] The sludge solidifying agent and the sludge are mixed and stirred by using the powerful stirring head 302 of the mixer truck. The mixer truck includes a movable vehicle body 300, and a movable arm 301 that can move in space is provided on the vehicle body 300. The inner end of the movable arm 301 is hinged to the vehicle body 300, and the powerful stirring head 302 is connected to the outer end of the movable arm 301; the powerful stirring head 302 includes a rotating shaft 303 provided at the outer end of the movable arm 301 and two longitudinally arranged stirring wheels 304, and the rotating shaft 303 is transversely arranged; the middle part of the rotating shaft 303 is movably penetrated through the outer end of the movable arm 301, and the two stirring wheels 304 are respectively connected to both ends of the rotating shaft 303 and rotate with the rotation of the rotating shaft 303.

[0059] The outer end of the movable arm 301 has a cavity 305 with an external opening, and the cavity 305 is located between the two stirring wheels 304; a fixed channel 306 is provided in the movable arm 301, the fixed channel 306 communicates with the middle part of the cavity 305, and the conveying pipe 206 is penetrated through the fixed channel 306 and communicates with the cavity 305.

[0060] Two air channels 307 are provided in the movable arm 301. The cavity 305 has two corresponding inner peripheral side walls, and the two inner peripheral side walls are respectively located on both sides of the conveying pipe 206; a plurality of horizontally arranged air outlets 308 are provided on the inner peripheral side walls, and the plurality of air outlets 308 communicate with the air channels 307 respectively.

[0061] When the stirring wheels 304 rotate and stir in the sludge, after the sludge solidifying agent is conveyed to the cavity 305 through the conveying pipe 206, it then falls into the sludge and is mixed and stirred with the sludge; at the same time, high-pressure air flows are respectively injected into the two air channels 307 by two air blowers, and the high-pressure air flows are blown towards the cavity 305 from the plurality of air outlets 308 to disperse and stir the sludge solidifying agent in the cavity 305.

[0062] The pressures of the high-pressure air flows injected into the two air channels 307 by the two air blowers are different, and within a set time, the pressures of the high-pressure air flows injected into the two air channels 307 by the two air blowers change alternately.

[0063] In this way, the provided movable vehicle body 300 and the movable arm 301 that can move around the vehicle body 300 can be used for construction at the set construction site well. At the same time, when the mixing wheel 304 at the outer end of the movable arm 301 contacts the soil, the mixing wheel 304 can be used for mixing. And a conveying pipe 206 is provided in the fixed track 306. The conveying pipe 206 can convey the sludge curing agent into the cavity 305, and it falls from the cavity 305 into the sludge to mix the sludge with the sludge curing agent. At this time, the mixing wheel 304 is mixing.

[0064] During the working process of the mixing wheel 304, by blowing high-pressure gas into the air duct 307 in the movable arm 301, the high-pressure gas is blown through the air duct 307 to each air outlet 308, and a plurality of air outlets 308 are respectively arranged oppositely on the inner peripheral side wall. The wind pressures blown out by the air outlets 308 on the two inner peripheral side walls change alternately, which can disperse and mix the sludge curing agent in the cavity 305, and avoid the situation that the sludge curing agent is stuck in the conveying pipe 206 due to blowing high-pressure gas into the conveying pipe 206 from both sides at the same time.

[0065] The mixing wheel 304 has a longitudinally arranged outer peripheral side wall, and a plurality of longitudinal blades 309 are provided on the outer peripheral side wall. The plurality of longitudinal blades 309 are arranged at intervals along the circumferential direction of the outer peripheral side wall.

[0066] The mixing wheel 304 has an inner side wall arranged towards the cavity 305, and a plurality of curved blades 310 are provided on the inner side wall. The plurality of curved blades 310 are arranged at intervals along the inner side wall; the curved blades 310 are arranged in multiple curved sections, and a plurality of through holes are provided on the curved blades 310, and the through holes penetrate the curved blades 310 transversely.

[0067] A plurality of bending parts are provided on the curved blade 310. The plurality of bending parts are integrally formed, and the adjacent bending parts are arranged in a curved manner. The ends of the adjacent bending parts are butted to form a curved butt joint section. The adjacent bending parts are bent relative to the curved butt joint section; the curved butt joint section bulges towards both sides to form a thickening section 311, and the thickening section 311 extends along the length direction of the curved butt joint section.

[0068] During the mixing process of the two mixing wheels 304, the curved blades are extruded by the sludge and the sludge curing agent, and the bending parts are bent and deformed reciprocally relative to the thickening section 311. At the same time, during the process of the bending parts recovering from the deformation, the sludge and the sludge curing agent are mixed.

[0069] In this way, the longitudinal blades 309 designed on the peripheral side wall can longitudinally stir the mixed soil body of the silt and the silt solidifying agent around the peripheral side wall. The bending blades 310 are provided on the inner side wall. The bending blades 310 can stir the soil body on the outer periphery of the inner side wall. At the same time, the bending blades 310 have thickening sections 311. The thickening sections 311 will bend reciprocally. When the pressure difference on both sides of the thickening section 311 reaches a certain value, the thickening section 311 will protrude towards the side with a smaller extrusion pressure on the soil body. As the stirring progresses, the pressure difference changes continuously, and the thickening section 311 will undergo reciprocating bending deformation. During this bending deformation process, the silt and the silt solidifying agent are also stirred.

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Construction method for solidifying flowing silt stratum, Characterized in that, A silt solidifying agent is configured, and the silt solidifying agent includes 42.5 P.O cement, S95-grade slag powder, gypsum and double salt; the 42.5 P.O cement, S95-grade slag powder, gypsum and double salt are mixed and stirred in a stirrer to form the silt solidifying agent; The stirrer is connected with a delivery pipe, the delivery pipe is provided with a pump body, and the silt solidifying agent in the stirrer is input into the silt in the silt stratum by using the delivery pipe, and the silt solidifying agent is stirred and mixed with the silt to form a silt solidified layer; after the silt solidified layer stands for a set time, the silt solidified layer solidifies; Before injecting the silt solidifying agent into the silt stratum, a plurality of air delivery pipes are inserted into the silt stratum, and a plurality of air holes are arranged on the side wall of the air delivery pipe; the outer end of the air delivery pipe is exposed on the silt stratum, and a high-pressure air flow is injected into the air delivery pipe by using a blower, and the high-pressure air flow is output to the silt stratum through the plurality of air holes to form a plurality of bubble holes in the silt stratum; The bottom of the air delivery pipe is provided with a bottom opening, and the bottom of the air delivery pipe is provided with a rotating ring; the inner side of the rotating ring is sleeved on the outer periphery of the bottom of the air delivery pipe and is fixedly connected with the air delivery pipe; the outer side of the rotating ring is provided with an outer ring body arranged rotatably; The bottom of the outer ring body is provided with a plurality of bottom blades extending downward, the bottom blades are located below the bottom opening of the air delivery pipe, and the plurality of bottom blades are arranged at intervals along the circumferential direction of the outer ring body; Along the direction from top to bottom, the bottom blades are arranged obliquely; the inner ends of the bottom blades extend towards the bottom opening of the air delivery pipe to form inner ends, and there is an inner end interval between adjacent inner ends, and the inner end interval communicates with the bottom opening of the air delivery pipe; When the blower injects high-pressure air flow into the air delivery pipe, part of the high-pressure air flow blows downward through the bottom opening and the inner end interval, and drives the plurality of bottom blades to rotate, stirring the silt at the bottom of the air delivery pipe; The stirrer includes a stirring cylinder, and a stirring cavity is provided in the stirring cylinder; the bottom of the stirring cylinder is provided with a connector, the delivery pipe is connected with the connector, and the connector controls the communication or cut-off between the delivery pipe and the stirring cavity; When the silt solidifying agent is mixed and stirred in the stirring cavity, the connector cuts off the delivery pipe from the stirring cavity; when it is necessary to inject the silt solidifying agent into the silt stratum through the delivery pipe, the connector connects the delivery pipe with the stirring cavity; The inner side wall of the stirring cavity is provided with an airbag layer that inflates and expands or deflates and contracts, and the airbag layer is arranged in a circumferential direction around the stirring cavity; a stirring shaft arranged longitudinally rotatably is provided in the stirring cavity, stirring blades are arranged on the outer periphery of the stirring shaft, and there is an interval between the stirring blades and the airbag layer; The airbag layer is provided with an air inlet and an air outlet. When the stirring shaft mixes and stirs the silt solidifying agent in the stirring cavity, the airbag layer is alternately inflated and deflated through the air inlet and the air outlet, so that the airbag layer alternately expands and contracts, and the alternating expansion and contraction of the airbag layer drive the silt solidifying agent on the airbag layer to move towards the middle of the stirring cavity.

2. The solidification construction method for the flowing and plastic silt stratum as described in claim 1, characterized in that, the outer ends of the bottom blades are arranged flush with the outer periphery of the outer ring body up and down.

3. The solidification construction method for the flowing and plastic silt stratum as described in claim 2, characterized in that, the outer ring body has an outer peripheral wall arranged outward, and the outer peripheral wall is provided with a plurality of outer peripheral blades, and the plurality of outer peripheral blades are arranged at intervals along the circumferential direction of the outer ring body; after the blower injects high-pressure air flow into the air delivery pipe, part of the high-pressure air flow blows out downward through the bottom opening and the inner end at intervals, driving the plurality of bottom blades and the plurality of outer peripheral blades to rotate, and the outer peripheral blades stir the silt outside the air delivery pipe.

4. The solidification construction method for the flowing and plastic silt stratum as described in claim 1, characterized in that, the silt in the silt stratum is stirred and mixed with the silt solidifying agent by using a powerful stirring head to form the silt solidification layer.

5. The solidification construction method for the flowing and plastic silt stratum as described in any one of claims 1 to 4, characterized in that, the silt solidifying agent and the silt are mixed and stirred by using the powerful stirring head of the mixer truck; the mixer truck includes a walkable vehicle body, and a movable arm that moves in space is arranged on the vehicle body. The inner end of the movable arm is hinged to the vehicle body, and the powerful stirring head is connected to the outer end of the movable arm; the powerful stirring head includes a rotating shaft arranged at the outer end of the movable arm and two longitudinally arranged stirring wheels, and the rotating shaft is arranged horizontally; the middle part of the rotating shaft is movably penetrated through the outer end of the movable arm, and the two stirring wheels are respectively connected to both ends of the rotating shaft and rotate along with the rotation of the rotating shaft; the outer end of the movable arm has a cavity with an external opening, and the cavity is located between the two stirring wheels; a fixed channel is arranged in the movable arm, and the fixed channel communicates with the middle part of the cavity, and the delivery pipe is penetrated through the fixed channel and communicates with the cavity; two air channels are arranged in the movable arm, the cavity has two corresponding inner peripheral side walls, and the two inner peripheral side walls are respectively located on both sides of the delivery pipe; a plurality of horizontally arranged air vents are arranged on the inner peripheral side walls, and the plurality of air vents communicate with the air channels respectively; when the stirring wheels rotate and stir in the silt, after the silt solidifying agent is conveyed to the cavity through the delivery pipe, it then falls into the silt and is mixed and stirred with the silt; meanwhile, high-pressure air flow is respectively injected into the two air channels by two blowers, and the high-pressure air flow blows towards the cavity through the plurality of air vents to disperse and stir the silt solidifying agent in the cavity; the pressures of the high-pressure air flows injected into the two air channels by the two blowers are different, and within a set time, the pressures of the high-pressure air flows injected into the two air channels by the two blowers change alternately.

6. The solidification construction method for the flowing and plastic silt stratum as described in claim 5, characterized in that, the stirring wheel has a longitudinally arranged outer peripheral side wall, and a plurality of longitudinal blades are arranged on the outer peripheral side wall, and the plurality of longitudinal blades are arranged at intervals along the circumferential direction of the outer peripheral side wall; The stirring wheel has an inner side wall facing the cavity, and a plurality of curved blades are provided on the inner side wall, and the plurality of curved blades are arranged at intervals along the inner side wall; the curved blades are arranged in multiple curved segments, and a plurality of through holes are provided on the curved blades, and the through holes penetrate the curved blades transversely; A plurality of bending portions are provided on the curved blade, and the plurality of bending portions are integrally formed, and adjacent bending portions are arranged in a curved manner, and the ends of adjacent bending portions are butted to form a curved butt joint section, and adjacent bending portions are arranged in a curved manner relative to the curved butt joint section; the curved butt joint section bulges toward both sides to form a thickened section, and the thickened section extends along the length direction of the curved butt joint section; During the stirring process of the two stirring wheels, the curved blades are squeezed by the sludge and the sludge curing agent, and the bending portion bends and deforms reciprocally relative to the thickened section. At the same time, during the process of the bending portion recovering from deformation, the sludge and the sludge curing agent are stirred.

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