CN114960814B - Method for conveying solid sludge of deep foundation pit - Google Patents
Method for conveying solid sludge of deep foundation pit Download PDFInfo
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- CN114960814B CN114960814B CN202210721827.6A CN202210721827A CN114960814B CN 114960814 B CN114960814 B CN 114960814B CN 202210721827 A CN202210721827 A CN 202210721827A CN 114960814 B CN114960814 B CN 114960814B
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- conveying
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/8808—Stationary installations, e.g. installations using spuds or other stationary supports
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/905—Manipulating or supporting suction pipes or ladders; Mechanical supports or floaters therefor; pipe joints for suction pipes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
- E02F5/287—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways with jet nozzles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F7/00—Equipment for conveying or separating excavated material
- E02F7/10—Pipelines for conveying excavated materials
Abstract
The application relates to the technical field of building construction, especially, relate to a deep foundation pit solid sludge conveying method, be built at a side bight of deep foundation pit and have mud pit and cistern, be provided with the silt in the outside of deep foundation pit and stack the district, the road spanned between silt stack district and cistern, the deep foundation pit adopts segmentation, layering to excavate the processing, including following construction steps: the utility model provides a dredge pipe discharges, delivery pipe discharges, silt delivery pump installs, deep basal pit earthwork excavation, solid form silt soften processing, flow and mould form silt and carry, in order to improve the time limit for a project of shortening foundation ditch construction, this application provides a deep basal pit solid form silt conveying method, can use manpower and materials sparingly to and improve the conveying efficiency of silt.
Description
Technical Field
The application relates to the technical field of building construction, in particular to a method for conveying solid sludge of a deep foundation pit.
Background
The foundation pit is a space below the ground excavated for construction of a building foundation and a basement, and in order to ensure operation safety of constructors, foundation pit supports are usually arranged on the side walls, corners and surrounding environments of the foundation pit so as to support and strengthen the inside of the foundation pit.
At present, in the work progress of foundation ditch, because there is very thick silt layer on the upper surface of foundation ditch excavation region, the hardness in silt layer is low, constructor or construction equipment is when silt layer passes through, and then cause the construction inconvenient, therefore, before foundation ditch earthwork excavation, generally need constructor lay stone fill roadbed on preset route earlier, utilize the excavator to foundation ditch earthwork excavation, and transport earth to the dump truck on, by constructor driving the dump truck again, fill roadbed through stone, finally transport earth to silt stack district department, accomplish the seting up of foundation ditch.
However, in the actual construction process, the constructors need to spend a long time paving the stone filled roadbed, and the transferring engineering quantity of the earthwork of the whole foundation pit is very large, so that manpower and material resources are wasted and the construction period is long.
Disclosure of Invention
In order to improve and shorten the construction period of foundation pit construction, the application provides a method for conveying solid sludge of a deep foundation pit, which can save manpower and material resources and improve the conveying efficiency of the sludge.
The application provides a method for conveying solid sludge of a deep foundation pit, which adopts the following technical scheme:
a mud pit and a reservoir are built at a corner of one side of a deep foundation pit, a mud stacking area is arranged outside the deep foundation pit, a road spans between the mud stacking area and the reservoir, and the deep foundation pit is excavated in a segmented and layered mode;
the construction method comprises the following construction steps:
step one: and (3) discharging by a mud discharging pipe: a sludge conveying point is set in the deep foundation pit, a sludge pump is arranged on a pontoon, the pontoon is fixed on the sludge conveying point of the deep foundation pit, one end of a sludge discharge pipe is communicated with the deep foundation pit, the other end of the sludge discharge pipe is communicated with a sludge pond, the output end of the sludge pump is assembled with the sludge discharge pipe, and a sludge discharge pipe is connected between the sludge pond and the sludge stacking area;
step two: discharging the water supply pipe: the water supply pump is arranged in the reservoir, one end of the water supply pipe is communicated with the reservoir, the other end of the water supply pipe is communicated with the deep foundation pit, and the output end of the water supply pump is communicated with the water supply pipe;
step three: and (3) installing a sludge conveying pump: the sludge conveying pump is arranged outside the foundation pit, the input end of the sludge conveying pump is communicated with the sludge discharge pipe, a sludge material cylinder is assembled at the output end of the sludge conveying pump, and the sludge material cylinder is communicated with the sludge tank;
step four: deep foundation pit earthwork excavation: digging hard earthwork in the digging area by a backhoe excavator, and digging fine sand in the digging area by a submersible slurry pump;
step five: softening solid sludge: manually pumping water or storing and soaking natural rainwater in the excavated area, and soaking the solid sludge for a period of time to form fluid-plastic sludge;
step six: and conveying the fluidized plastic sludge: and the flowing plastic sludge sequentially passes through the sludge conveying pump, the sludge discharge pipe, the sludge pond and the sludge discharge pipe, and is finally stored in the sludge stacking area.
Through adopting above-mentioned technical scheme, deep basal pit adopts segmentation, layering excavation processing, so that constructor handles different earthwork, it is biggest to excavate the biggest stereoplasm earthwork of hardness through the backhoe excavator cooperation dump truck, through diving the fine sand of sediment stuff pump excavation powder, finally transport through the mode of water storage soaking and pumping and flow the shaping silt, can accomplish the seting up of excavation region, simultaneously can conveniently carry the silt in the deep basal pit to silt stacking area, the whole excavation process of deep basal pit need not constructor excessively intervene, on the one hand can avoid laying stone to fill out the road bed, reduce constructor excavation transportation's engineering quantity, save manpower and materials, shorten the time limit for construction of deep basal pit effectively, on the other hand can reduce equipment and produce additional load to the steel structure post of installing in the deep basal pit when walking in the deep basal pit, namely, reduce the disturbance to the steel structure post, and, reduce the equipment because the unstable condition that falls down of foundation appears in the course in the work process, be favorable to guaranteeing constructor the operation safety in the deep basal pit excavation process.
Preferably, the bottom of the mud pit and the bottom of the water storage pool are made of 100-thickness C20 concrete, and the wall enclosure walls of the mud pit and the water storage pool are made of 240-thickness cement bricks M10 cement sand.
Through adopting above-mentioned technical scheme, mud pit, cistern firmly install, make mud pit, cistern have good structural strength, difficult emergence collapses, be favorable to extension mud pit, cistern's life to a certain extent.
Preferably, the inner side wall of the mud pit and the inner side wall of the reservoir are sequentially coated with a cement mortar layer and a waterproof layer.
Through adopting above-mentioned technical scheme, through having paintd cement mortar layer and waterproof layer in proper order at the inside wall of mud pit, the inside wall of cistern, make mud pit, cistern obtain that the inner wall has good waterproof nature and weatherability, be favorable to prolonging the life of mud pit, cistern.
Preferably, in the processing step of discharging the sludge discharge pipe in the first step, a lubricant is added at the sludge discharge pipe and the pipe wall of the sludge discharge pipe.
Through adopting above-mentioned technical scheme, through adding the lubricant that is equipped with in mud pipe, mud pipe's pipe wall department, can reduce the frictional force between plastic form silt and the mud pipe wall of flowing, or between plastic form silt and the mud pipe wall of flowing, improve plastic form silt's mobility, play the effect that improves the pumping continuity.
Preferably, the middle part of the road is provided with a plurality of mounting grooves, the sludge discharge pipes are correspondingly arranged in the mounting grooves, the top of each sludge discharge pipe is provided with a pipeline positioning frame, and the pipeline positioning frames are used for spacing a plurality of sludge discharge pipes.
Through adopting above-mentioned technical scheme, the seting up of mounting groove makes the silt discharging pipe can place steadily, plays the effect of location to the silt discharging pipe, and the distance between two adjacent silt discharging pipes can be adjusted in the setting of pipeline locating rack, plays the effect of adjusting the straightness between the silt discharging pipe, can improve the conveying efficiency of flow plastic form silt in the silt discharging pipe to a certain extent.
Preferably, a stone punching mechanism is arranged at a position, close to the sludge conveying point, of the side wall of the deep foundation pit, the stone punching mechanism is aligned to the bottom of the deep foundation pit and impacts stones accumulated at the bottom of the sludge conveying point, and the input end of the sludge discharge pipe is communicated with the top of the side wall of the deep foundation pit.
Through adopting above-mentioned technical scheme, constructor utilizes towards stone mechanism to strike the stone of accumulation in silt delivery point bottom, can collect the stone fast, conveniently, erode the stone to the preset position to constructor builds the construction step of concrete support to regional juncture, be favorable to improving the utilization ratio of resource, reduce engineering cost, be favorable to reducing the engineering volume of material transportation, short construction period.
Preferably, the sludge conveying points are a plurality of, the number of the sludge discharge pipes and the number of the water supply pipes correspond to the number of the sludge conveying points, and the sludge conveying points are set in the excavation area of the deep foundation pit.
Through adopting above-mentioned technical scheme, through setting up a plurality of silt delivery points to with silt delivery point settlement in the excavation region, can take out the water in the cistern fast to the excavation region in, shortened the pumping time, improved the work efficiency of deep basal pit pumping silt.
Preferably, in the processing step of conveying the fluid plastic sludge in the step six, after the first section of excavation of the deep foundation pit is completed, backfilling the deep foundation pit to the elevation position of the terrace, and tamping backfilled soil.
Through adopting above-mentioned technical scheme, backfill to terrace elevation position through to the deep basal pit after accomplishing the excavation to tamp backfill soil property, on the one hand can reach the effect of developing the interior construction process of deep basal pit simultaneously, on the other hand can in time consolidate the structure in the deep basal pit to reinforcing the structural stability of deep basal pit improves constructor's operation factor of safety.
Preferably, after the deep foundation pit is excavated, the sludge conveying points are transferred to the periphery of the next section of area to be excavated, and the distance between two adjacent sludge conveying points is 5m.
Through adopting above-mentioned technical scheme, the silt delivery point is followed the development of engineering and is shifted, makes the slush pump of installing on silt delivery point remain the distance closely with the excavation region all the time, makes the intraductal high pressure state that remains all the time of mud discharge, and then improves the conveying efficiency of flow plastic form silt, improves the transportation continuity.
Preferably, a circulating water pipe with a pump is communicated between the mud pit and the water storage pool, and clarified water in the mud pit is discharged into the water storage pool through the circulating water pipe with the pump.
Through adopting above-mentioned technical scheme, under the effect of taking pump circulating water pipe, can easily transport back the cistern with the water after the mud pond is inside clear, water resource can cyclic utilization.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the whole excavation process of the deep foundation pit does not need excessive intervention of constructors, on one hand, the construction method can avoid paving stone to fill roadbed, reduce the engineering quantity of excavation and transportation of constructors, save manpower and material resources, effectively shorten the construction period of the deep foundation pit, on the other hand, the additional load of equipment on steel structure columns arranged in the deep foundation pit when the equipment walks in the deep foundation pit can be reduced, namely, the disturbance on the steel structure columns is reduced, in addition, the situation that the equipment sags due to unstable foundation in the construction process is reduced, and the safety of the constructors in the excavation process of the deep foundation pit is guaranteed;
2. the arrangement of the mounting groove enables the sludge discharge pipes to be stably placed, plays a role in positioning the sludge discharge pipes, and the arrangement of the pipeline positioning frame can adjust the distance between two adjacent sludge discharge pipes, plays a role in adjusting the straightness between the sludge discharge pipes, and can improve the conveying efficiency of the flow-plastic sludge in the sludge discharge pipes to a certain extent;
3. constructors impact the stones accumulated at the bottom of the sludge conveying point by using the stone flushing mechanism, can collect the stones rapidly and conveniently, and flush the stones to a preset position, so that the constructors can conveniently construct the construction step of concrete support at the junction of the areas, the utilization rate of resources is improved, the construction cost is reduced, the engineering quantity of material transportation is reduced, and the construction period is short.
Drawings
Fig. 1 is a schematic structural diagram of a deep foundation pit in an embodiment of the present application.
Fig. 2 is a schematic representation of an excavated area in an embodiment of the present application.
Fig. 3 is a construction flow chart of an embodiment of the present application.
Fig. 4 is a schematic view of the installation of a sludge discharge pipe in the embodiment of the present application.
Reference numerals illustrate: 1. a slurry pool; 2. a reservoir; 3. a sludge stacking area; 4. a road; 41. a mounting cavity; 42. a mounting groove; 43. a pipe positioning frame; 5. deep foundation pit; 51. a sludge conveying point; 52. excavating an area; 53. the area to be excavated; 54. supporting concrete; 61. a mud pipe; 611. a slurry pump; 62. a sludge discharge pipe; 63. a water supply pipe; 64. a water supply pump; 65. a sludge transfer pump; 651. a silt material cylinder; 66. circulating water pipe with pump.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-4.
The embodiment of the application discloses a method for conveying solid sludge of a deep foundation pit.
Referring to fig. 1 and 2, a deep foundation pit 5 is excavated by segmentation and layering, the deep foundation pit 5 can be divided into an excavation area 52 and an area 53 to be excavated along the transverse direction of the deep foundation pit 5, the deep foundation pit 5 can be divided into three layers from top to bottom, the first layer is hard earthwork, the second layer is silty soil, and the third layer is solid sludge, wherein the thickness of the solid sludge is 6m, the thickness of silty soil is 1m, and silty soil is unevenly distributed in the whole deep foundation pit 5.
The mud pit 1 and the reservoir 2 are built at one side corner of the deep foundation pit 5, the mud stacking area 3 is arranged outside the deep foundation pit 5, the road 4 spans between the mud stacking area 3 and the reservoir 2, wherein the bottom of the mud pit 1 and the reservoir 2 are made of 100-thickness C20 concrete, the wall of the mud pit 1 and the wall of the reservoir 2 are made of 240-thickness cement bricks M10 cement sand, the inner side wall of the mud pit 1 and the inner side wall of the reservoir 2 are coated with cement mortar layers, after the cement mortar layers are cured to be designed strength, a waterproof layer is coated outside the cement mortar layers, so that the mud pit 1 and the reservoir 2 have good structural strength and waterproof effect, and the weather resistance of the pond and the reservoir 2 can be improved, and the service life is prolonged.
The method for conveying the solid sludge of the deep foundation pit 5 comprises the following construction steps:
step one: the mud discharging pipe 61 discharges: the interior of the deep foundation pit 5 is provided with a sludge conveying point 51, a sludge pump 611 is arranged on a pontoon, the pontoon is fixed on the sludge conveying point 51 of the deep foundation pit 5, one end of a sludge discharge pipe 61 is communicated with the deep foundation pit 5, the other end of the sludge discharge pipe is communicated with a sludge tank 1, the output end of the sludge pump 611 is assembled with the sludge discharge pipe 61, and a sludge discharge pipe 62 is connected between the sludge tank 1 and a sludge stacking area 3.
Specifically, referring to fig. 2 and 3, there are four sludge transfer points 51, two sludge transfer points 51 in the transverse direction are on the same horizontal line, two sludge transfer points 51 in the longitudinal direction are on the same extension line, the distance between two adjacent sludge transfer points 51 is 5m, and the four sludge transfer points 51 are set in the excavation region 52 of the deep foundation pit 5, so that the installation of the pontoon, the slurry pump 611 is facilitated.
In the embodiment of the application, the mud pump 611 is fixed on the pontoon, the constructor hangs the pontoon carrying the mud pump 611 into the mud conveying point 51, and the input end of the mud pipe 61 is installed at the top of the side wall of the deep foundation pit 5, so that the mud pipe 61 is connected with the deep foundation pit 5, that is, the input end of the mud pipe 61 is directly put into the excavation region 52 for self-priming during construction.
The mud discharging pipe 61 is paved along the direction of the mud pit 1, the length dimension of the mud discharging pipe 61 is larger than the distance from the deep foundation pit 5 to the mud pit 1, the mud discharging pipe 61 is properly bent in the paving and discharging process, when the mechanical movement or the movement of the mud conveying point 51 is carried out, the length of the mud discharging pipe 61 in construction is ensured, and the mud pit 1 at the output end of the mud discharging pipe 61 is communicated.
More specifically, one end of the sludge discharge pipe 62 is connected with the mud pit 1, the other end is connected with the sludge stacking area 3, and the middle part of the sludge discharge pipe 62 spans across the road 4, referring to fig. 2 and 4, a mounting cavity 41 is formed in the middle part of the road 4, a plurality of mounting grooves 42 are formed in the bottom of the road 4 close to the mounting cavity 41, the sludge discharge pipe 62 corresponds to the number of the mounting grooves 42, the mounting grooves 42 are arc grooves, constructors correspondingly and stably place the sludge discharge pipe 62 in the mounting grooves 42, a pipeline positioning frame 43 is arranged in the mounting cavity 41, the pipeline positioning frame 43 is made of 20 thick steel plates, the pipeline positioning frame 43 is fixedly inserted between the sludge discharge pipes 62, and the sludge discharge pipes 62 can be separated, so that the effect of positioning and adjusting the straightness of the sludge discharge pipe 62 is achieved.
In the embodiment of the application, the sludge discharge pipe 62 is a pump sludge discharge pipe 62, and the sludge discharge pipes 61 and 62 are all PE pipes, so that the sludge discharge pipes 61 and 62 have good weather resistance, and the wall parts of the sludge discharge pipes 61 and 62 are additionally provided with a lubricant so as to reduce the resistance of pumped sludge in the sludge discharge pipe 61 or 62 and improve the continuity of sludge pumping.
Step two: the water supply pipe 63 discharges: the water supply pump 64 is installed in the reservoir 2, one end of the water supply pipe 63 is connected to the reservoir 2, the other end is connected to the deep pit 5, and the output end of the water supply pump 64 is connected to the water supply pipe 63.
Referring to fig. 2 and 3, the number of the sludge discharge pipes 61, the number of the water supply pipes 63, and the number of the sludge transfer points 51 correspond to each other, and a constructor can control the same sludge transfer point 51, perform sludge impact and sludge pumping at the same time according to actual conditions to improve a sludge pumping effect, or can control sludge pumping times of different sludge transfer points 51 to improve flexibility in a sludge pumping process.
The constructor draws water from the ditch near the deep foundation pit 5 into the reservoir 2 as high-pressure pump draft for construction to, switch on and have the circulating water pipe 66 of taking the pump between mud pit 1 and reservoir 2, the water after the mud pit 1 clarification is discharged into reservoir 2 through taking the circulating water pipe 66 of taking the pump in, uses as the flushing circulating water, is favorable to the water economy resource.
Step three: the sludge transfer pump 65 is installed: the silt delivery pump 65 is installed outside the foundation pit, the input end of the silt delivery pump 65 is communicated with the mud discharging pipe 61, a silt material cylinder 651 is assembled at the output end of the silt delivery pump 65, and the silt material cylinder 651 is communicated with the mud pit 1.
In the embodiment of the application, the sludge conveying pump 65 is a double-shaft pre-pressing screw conveyor, and the lubricant is also added at the conveying pipeline of the sludge conveying pump 65, so that the resistance of pumping sludge is reduced, and the continuity of pumping the sludge is improved.
Step four: deep foundation pit 5 earthwork excavation: the hard earthwork is excavated in the excavated area 52 by the backhoe, and the fine silt is excavated in the excavated area 52 by the submersible slurry pump.
Referring to fig. 2 and 3, the hard earthwork and fine sand excavated in the excavation region 52 is temporarily placed in the excavation region 52, the soil is transferred to the dump truck by using the backhoe excavator, the dump truck is driven by a constructor, and finally the soil is transferred to the sludge stacking region 3, and the hard earthwork and fine sand are impacted by the high-pressure water gun in the process of excavating by the backhoe excavator or the submersible slurry pump, so that the humidity of the hard earthwork and fine sand can be increased, the hardness of the hard earthwork and fine sand can be reduced, and the convenience and efficiency of excavation can be improved.
Step five: softening solid sludge: the excavated area 52 is manually pumped or naturally rain water soaked.
Specifically, referring to fig. 1 and 2, a constructor starts a water supply pump 64 to transport water in the reservoir 2 into the excavation region 52, so as to achieve pumping and soaking, wherein the solid sludge forms a fluid plastic sludge after being soaked for a period of time, and the soaking time of the solid sludge is a conversion time of the solid sludge into the fluid plastic sludge in the practical application process, and the fluid plastic sludge is soft soil with a certain degree of fluidity.
Step six: and conveying the fluidized plastic sludge: the fluidized plastic sludge passes through the sludge transfer pump 65, the sludge discharge pipe 61, the sludge pond 1, and the sludge discharge pipe 62 in this order, and is finally stored in the sludge stacking area 3.
Specifically, referring to fig. 1 and 2, a constructor starts a water supply pump 64, a slurry pump 611 and a slurry conveying pump 65, wherein the water supply pump 64 is used as a power source for conveying the flowing slurry in the excavation area 52 to enhance the fluidity of the flowing slurry, the slurry conveying pump 65 presses the flowing slurry into the slurry material cylinder 651 to enable the slurry material cylinder 651 to be in a suction stroke state, the slurry material cylinder 651 is guaranteed to achieve high fullness, the slurry pump 611 conveys the flowing slurry in the slurry material cylinder 651 into the slurry tank 1, and the slurry discharge pipe 62 conveys the flowing slurry in the slurry tank 1 into the slurry stacking area 3, so that the whole slurry conveying process is completed.
In the embodiment of the present application, in the sludge pumping process of the sludge transfer pump 65, only the flowing plastic sludge with smaller density can be pressed into the sludge material cylinder 651, or the stone with smaller volume can be pressed into the sludge material cylinder 651, and the stone with larger volume is accumulated at the bottom of the deep foundation pit 5 close to the sludge transfer point 51 under the action of pumping force.
The side wall of the deep foundation pit 5 is provided with a stone-punching mechanism at a position close to the sludge conveying point 51, the stone-punching mechanism is aligned to the bottom of the deep foundation pit 5 and impacts stones accumulated at the bottom of the sludge conveying point 51, and the stone-punching mechanism is a stone-punching high-pressure water gun.
After the deep foundation pit 5 is excavated, a constructor backfills the deep foundation pit 5 to the terrace elevation position and tamps backfill soil, and in the backfilling process, the stone flushing mechanism flushes the stone to the junction position of the excavation area 52 and the area 53 to be excavated, specifically, the constructor adjusts the angle between the stone flushing mechanism and the stone to be 45 degrees, so that the stone can be easily adjusted under the action of high-speed water flow.
In the embodiment of the application, the deep foundation pit 5 is excavated from the corner to the middle, and after one section of excavation of the deep foundation pit 5 is completed, the sludge conveying point 51 is transferred to the periphery of the next section of area 53 to be excavated.
When constructors construct the concrete support 54 at the junction of the areas, the concrete support 54 of the deep foundation pit 5 is constructed from the corners to the middle, so that the structural stability of the deep foundation pit 5 is ensured, collapse phenomenon is reduced, stone, hard earthwork and fine sand excavated in the excavated area 52 can be used as raw materials for constructing the concrete support 54, the utilization rate of resources is improved, the engineering quantity of material transportation is reduced, and the construction period is shortened.
Referring to fig. 1 and 2, concrete supports 54 at corners of the deep foundation pit 5 are obliquely arranged, and stones are collected in the middle of the deep foundation pit 5 by a stone-punching mechanism when the middle region of the deep foundation pit 5 is excavated, so that the subsequent construction process can be carried out.
After each section of the excavation region 52 is constructed, the construction steps one to six are repeated, and the steps are sequentially advanced.
The foregoing is a preferred embodiment of the present application, which is merely illustrative of the present application and not intended to limit the scope of the present application in any way, so long as the present application is not limited thereto: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (8)
1. A method for conveying solid sludge of a deep foundation pit is characterized in that a slurry pond (1) and a water storage tank (2) are built at one side corner of the deep foundation pit (5), a sludge stacking area (3) is arranged outside the deep foundation pit (5), a road (4) spans between the sludge stacking area (3) and the water storage tank (2), the deep foundation pit (5) is excavated in a segmented and layered manner, the deep foundation pit (5) can be divided into an excavation area (52) and an area to be excavated (53) along the transverse direction of the deep foundation pit (5), the deep foundation pit (5) can be divided into three layers from top to bottom, a first layer is hard earthwork, a second layer is fine sand, a third layer is solid sludge,
the construction method comprises the following construction steps:
step one: discharging by a mud discharging pipe (61): a sludge conveying point (51) is arranged in the deep foundation pit (5), a sludge pump (611) is arranged on a pontoon, the pontoon is fixed on the sludge conveying point (51) of the deep foundation pit (5), one end of a sludge discharge pipe (61) is communicated with the deep foundation pit (5), the other end of the sludge discharge pipe is communicated with a sludge tank (1), the output end of the sludge pump (611) is assembled with the sludge discharge pipe (61), and a sludge discharge pipe (62) is connected between the sludge tank (1) and the sludge stacking area (3);
step two: and a water supply pipe (63) for discharging: the water supply pump (64) is arranged in the water reservoir (2), one end of the water supply pipe (63) is communicated with the water reservoir (2), the other end of the water supply pipe is communicated with the deep foundation pit (5), and the output end of the water supply pump (64) is communicated with the water supply pipe (63);
step three: and (3) installing a sludge conveying pump (65): the sludge conveying pump (65) is arranged outside the foundation pit, the input end of the sludge conveying pump (65) is communicated with the sludge discharge pipe (61), a sludge material cylinder (651) is arranged at the output end of the sludge conveying pump (65), and the sludge material cylinder (651) is communicated with the sludge tank (1);
step four: deep foundation pit (5) earthwork excavation: digging hard earthwork in the digging area (52) by a backhoe excavator, and digging fine sand in the digging area (52) by a submersible slurry pump;
step five: softening solid sludge: manually pumping water or storing and soaking natural rainwater in the excavated area (52), and soaking the solid sludge for a period of time to form flowing plastic sludge;
step six: and conveying the fluidized plastic sludge: the flowing plastic sludge sequentially passes through the sludge conveying pump (65), the sludge discharging pipe (61), the sludge pond (1) and the sludge discharging pipe (62) and is finally stored in the sludge stacking area (3);
in the sludge pumping process of the sludge conveying pump (65), only small-density plastic-flowing sludge can be pressed into the sludge material cylinder (651), or small-volume stones can be pressed into the sludge material cylinder (651), and large-volume stones are accumulated at the bottom of the deep foundation pit (5) close to the sludge conveying point (51) under the action of pumping force;
a stone punching mechanism is arranged at the position, close to the sludge conveying point (51), of the side wall of the deep foundation pit (5), and is aligned to the bottom of the deep foundation pit (5) and used for impacting stones accumulated at the bottom of the sludge conveying point (51), and the input end of the sludge discharge pipe (61) is communicated with the top of the side wall of the deep foundation pit (5);
a plurality of mounting grooves (42) are formed in the middle of the road (4), sludge discharge pipes (62) are correspondingly arranged in the mounting grooves (42), pipeline locating frames (43) are arranged at the tops of the sludge discharge pipes (62), and the pipeline locating frames (43) are used for spacing a plurality of sludge discharge pipes (62).
2. The method for conveying the solid sludge of the deep foundation pit according to claim 1, wherein the bottom of each of the mud pit (1) and the reservoir (2) is 100-thickness C20 concrete, and the wall enclosure walls of each of the mud pit (1) and the reservoir (2) are 240-thickness cement bricks M10 cement sand.
3. The method for conveying the solid sludge of the deep foundation pit according to claim 1, wherein the inner side wall of the slurry tank (1) and the inner side wall of the reservoir (2) are sequentially coated with a cement mortar layer and a waterproof layer.
4. The method for conveying solid sludge in deep foundation pit according to claim 1, wherein in the step of processing the sludge discharge pipe (61) of the first step, a lubricant is added to the walls of the sludge discharge pipe (61) and the sludge discharge pipe (62).
5. The method for conveying solid sludge in a deep foundation pit according to claim 1, wherein the sludge conveying points (51) are a plurality of, the number of sludge discharge pipes (61) and the number of water supply pipes (63) correspond to the number of the sludge conveying points (51), and the sludge conveying points (51) are set in the excavation area (52) of the deep foundation pit (5).
6. The method for conveying solid sludge of a deep foundation pit according to claim 1, wherein in the step of conveying the solid sludge of the deep foundation pit, after the deep foundation pit (5) is excavated for a section, backfilling the deep foundation pit (5) to the elevation of a terrace and tamping backfilled soil.
7. A method for conveying solid sludge in a deep foundation pit according to claim 1, characterized in that after the completion of one section of excavation of the deep foundation pit (5), the sludge conveying points (51) are transferred to the periphery of the next section of area (53) to be excavated, and the distance between two adjacent sludge conveying points (51) is 5m.
8. The method for conveying the solid sludge of the deep foundation pit according to claim 1, wherein a circulating water pipe (66) with a pump is connected between the mud pit (1) and the water reservoir (2), and the clarified water in the mud pit (1) is discharged into the water reservoir (2) through the circulating water pipe (66) with the pump.
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| CN116362162B (en) * | 2023-05-30 | 2023-08-01 | 湖南百舸水利建设股份有限公司 | Underwater high-concentration sludge conveying method, system, computer equipment and storage medium |
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| CN2435432Y (en) * | 2000-08-16 | 2001-06-20 | 陶松垒 | Pollutionless sludge removing and conveying equipment |
| CN103615010A (en) * | 2013-12-03 | 2014-03-05 | 明业建设集团有限公司 | Construction method of digging and conveying earth of deep foundation pit through current scour |
| CN107460881A (en) * | 2016-06-02 | 2017-12-12 | 宜兴市周铁镇生力钻探机械厂 | A kind of subgrade water jetting earth excavation construction technology |
| CN112030865A (en) * | 2020-08-28 | 2020-12-04 | 中国化学工程第三建设有限公司 | Pond dredging method and suction device |
| CN113265979A (en) * | 2021-05-17 | 2021-08-17 | 中电建十一局工程有限公司 | Construction method for dredging shallow layer of thick-sludge river |
| CN114016511A (en) * | 2021-11-23 | 2022-02-08 | 中国二十冶集团有限公司 | Excavation system of deep foundation pit and excavation construction method of deep foundation pit |
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