CN112359856A

CN112359856A - Gravity flow method hydraulic filling type foundation treatment construction process

Info

Publication number: CN112359856A
Application number: CN202011225635.3A
Authority: CN
Inventors: 王成; 董鹏; 刘连岭; 范晓亮
Original assignee: Weifang Hongrun New Materials Co ltd
Current assignee: Weifang Hongrun New Materials Co ltd
Priority date: 2020-11-05
Filing date: 2020-11-05
Publication date: 2021-02-12

Abstract

The invention discloses a gravity flow method hydraulic fill type foundation treatment construction process, which solves the problem of high precipitation difficulty of a hydraulic fill layer in a coastal area in the prior art, has the effect of quickly ensuring the separation effect of silt and water in the coastal area, and has the following specific scheme: a gravity flow method hydraulic filling type foundation treatment construction process comprises the following steps: deep ploughing the hydraulic filling area to destroy the impervious layer; before the blow-filling area is subjected to blow filling, a latticed and communicated underground drainage blind ditch is arranged, wherein the latticed and communicated underground drainage blind ditch is provided with a plurality of rows and a plurality of columns of underground drainage blind ditches which are communicated with each other, and a reverse filtering cover plate is arranged at the top of the underground drainage blind ditch; performing blow filling on the blow filling area to form a blow filling layer; building a zigzag communication type drainage channel on the hydraulic reclamation layer and the periphery; extruding and vibrating the hydraulic filling layer, and collecting drainage; and carrying out tamping operation construction on the hydraulic reclamation layer through a tamping machine, and treating the foundation and further draining water.

Description

Gravity flow method hydraulic filling type foundation treatment construction process

Technical Field

The invention relates to the field of coastal area construction, in particular to a gravity flow method hydraulic filling type foundation treatment construction process.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The coastal region is mostly the salt field of the salt that shines, and the bottom can set up the tamping silt layer that does not contain organic matter when building the salt pond, and plastic film layer reaches the effect of antiseep, and when the regional construction industrial factory project of salt factory, it reaches the design height to adopt the blow-fill mode to increase original terrace more, guarantees that the terrace elevation can not submerged by the sea water, carries out ground treatment with the mode of ramming, reaches the purpose that improves the bearing capacity.

However, the inventor finds that the prior art has the following problems:

the impermeable layer at the bottom of the salt pond, namely the plastic layer and the silt impermeable layer, has the problem of improper treatment, so that a factory area is in a basin, brine and rainwater cannot seep downwards to cause a large amount of brine and rainwater to be remained on the impermeable layer of the salt pond, the alkalinity is large due to special soil quality and regions, the damage to buildings is large, the corrosivity is strong, the service lives of the buildings and underground pipe networks are seriously shortened, and the corrosivity to metal products and concrete is strong;

in addition, the pumping and filling project of the whole coastal area has high precipitation difficulty and difficult drainage, the time consumption is long, the tamping operation cannot be normally carried out due to the high water content in the sediment, the project construction needs long-time airing, the water content in the sediment is reduced by evaporation, the dependence degree on natural conditions is high, the time consumption is long, and the pumping and filling project is not suitable for tamping foundation treatment operation with a limited construction period.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a gravity flow method hydraulic filling type foundation treatment construction process, which can effectively treat an impermeable layer, accelerate the separation of silt and water, quickly and smoothly achieve the aim of precipitation and improve the bearing capacity of a foundation in advance by tamping.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a gravity flow method hydraulic filling type foundation treatment construction process comprises the following steps:

deep ploughing the hydraulic filling area to destroy the impervious layer;

before the blow-filling area is subjected to blow filling, a latticed and communicated underground drainage blind ditch is arranged, wherein the latticed and communicated underground drainage blind ditch is provided with a plurality of rows and a plurality of columns of underground drainage blind ditches which are communicated with each other, and a reverse filtering cover plate is arranged at the top of the underground drainage blind ditch;

performing blow filling on the blow filling area to form a blow filling layer;

building a zigzag communication type drainage channel on the hydraulic reclamation layer and the periphery;

extruding and vibrating the hydraulic filling layer, and collecting drainage;

and carrying out tamping operation construction on the hydraulic reclamation layer through a tamping machine, and treating the foundation and further draining water.

In the construction process, the salt pond impervious layer can be smoothly damaged through deep ploughing to enable rainwater to smoothly infiltrate underground, the hydraulic reclamation layer is subjected to extrusion vibration and tamping mechanical tamping operation, the underground drainage blind ditch and the reversed-square-shaped communicated drainage channel are matched, the acceleration of silt and water separation by a gravity flow method is realized, the rapid discharge of water in the hydraulic reclamation layer is facilitated, the purpose of precipitation is rapidly and smoothly achieved, the tamping operation mainly aims to improve the bearing capacity of a foundation in a hydraulic reclamation area, the treatment effect on the impervious layer is finally guaranteed, and the outflow of water in the hydraulic reclamation layer is fully guaranteed.

According to the gravity flow method blowing filling type foundation treatment construction process, the periphery of the latticed and communicated underground drainage blind ditch is provided with the plurality of drainage wells, the drainage wells are arranged on the periphery of the blowing filling area and are communicated with the underground drainage blind ditch, and the drainage wells temporarily store and discharge water collected by the underground drainage blind ditch.

According to the gravity flow method hydraulic fill type foundation treatment construction process, in order to improve the strength of the anti-filtering cover plate, the anti-filtering cover plate is respectively provided with the reinforcing steel bars in the vertical direction and the transverse direction, and is wrapped by the anti-filtering geotextile and used for filtering silt and permeating water to the drainage channel;

the step towards the inner side is arranged at the top of the underground drainage blind ditch, and the step supports the anti-filtering cover plate, so that the stability of the anti-filtering cover plate can be ensured;

or, both sides of the top of the underground drainage blind ditch are respectively provided with a groove, and both sides of the lower surface of the reverse filtering cover plate are respectively provided with a bulge which can be matched with the grooves.

According to the gravity flow method hydraulic filling type foundation treatment construction process, the zigzag-shaped communicated drainage channel comprises a plurality of drainage channels, the top of the drainage channel is provided with the spliced drainage channel frame, the drainage channel frame is wrapped and firmly fixed by the reverse filter geotextile, and the drainage channel frame filters impurities to prevent silt from entering the drainage channel;

in order to facilitate the entry of water into the drain channel, the width of the top of the drain channel is greater than the width of the bottom.

According to the gravity flow method hydraulic reclamation type foundation treatment construction process, in order to ensure the precipitation efficiency of extrusion vibration on a hydraulic reclamation layer, the hydraulic reclamation layer is subjected to extrusion vibration through the mechanical vibration arm, the mechanical vibration arm is arranged on a machine capable of walking, such as a broadband machine, and reciprocates on the surface of the hydraulic reclamation layer, the mechanical vibration arm comprises a vibration motor which is mechanically connected with the broadband machine, and the vibration motor is connected with the vibration plate and is in contact with the hydraulic reclamation layer through the vibration plate.

According to the gravity flow method hydraulic reclamation type foundation treatment construction process, before extrusion vibration is carried out on the hydraulic reclamation layer, a plurality of water collecting wells are arranged between the drainage channels of the square-back communication type drainage channels in the hydraulic reclamation layer, and the water collecting wells are arranged between two adjacent rows of the drainage channels.

According to the gravity flow method hydraulic fill type foundation treatment construction process, the holes are distributed in the circumferential direction of the water collecting wells, the pipelines are radiated towards the periphery of part of the water collecting wells, the holes are formed in the surfaces of the pipelines, the surfaces of the pipelines are wrapped with the anti-filtration geotextile, and the pipelines are buried in the sediment of the hydraulic fill layer to collect water in the sediment and realize communication of part of the water collecting wells.

In order to ensure that the hydraulic reclamation type foundation treatment construction process adopts the gravity flow method, in order to ensure that the hydraulic reclamation layer can be lowered to the greatest extent, the tamping operation construction on the hydraulic reclamation layer through the tamping machine comprises the following steps:

determining tamping points of a blowing and filling layer in a blowing and filling area;

performing point ramming on the hydraulic filling layer for at least two times, wherein the first point ramming is completed in two times, and the interval time between the two times of ramming is more than or equal to 7 days;

and fully tamping the hydraulic filling layer.

The gravity flow method hydraulic fill type foundation treatment construction process comprises the following steps of: tamping points of the blown-filling layer twice, wherein each tamping point is tamped at least twice in the first full tamping, and is lap-jointed tamping; the second full-compaction tamping energy is less than the first full-compaction tamping energy, and the second full-compaction tamping energy is lapping tamping;

and before the tamping machine works, laying a spare road base plate on a hydraulic filling layer.

The beneficial effects of the invention are as follows:

1) the construction process is given, the deep ploughing is carried out on the hydraulic fill area to destroy the impervious layer of the salt pan (comprising the sludge rammed layer without organic matters and the plastic film layer), the problems that the sludge rammed layer without organic matters does not absorb water and is difficult to treat are effectively solved, the impervious layer of the salt pond can be smoothly destroyed to enable rainwater to smoothly infiltrate underground, the purpose of flushing saline-alkali soil is achieved, the saline-alkali soil flushed for years can greatly reduce the salt alkalinity, and the service life of buildings and underground pipe networks can be greatly prolonged.

2) According to the invention, by carrying out extrusion vibration and tamping mechanical tamping operation on the hydraulic reclamation layer and matching with underground drainage blind ditches and reversed-square-shaped communicated drainage channels with different spatial distributions, the gravity flow method is realized to accelerate the separation of silt and water, so that the water in the hydraulic reclamation layer is conveniently and rapidly discharged, the purpose of dewatering is rapidly and smoothly achieved, the bearing capacity condition of tamping mechanical intervention can be realized in a short time, the tamping mechanical intervention is facilitated in advance, and the construction period is favorably accelerated.

3) The invention can cover the top of the underground drainage blind ditch through the arrangement of the back-filtering cover plate, prevents silt of a hydraulic reclamation layer from entering the underground drainage blind ditch, and can effectively improve the supporting strength of the back-filtering cover plate through arranging the reinforcing steel bar processed grate or the composite material back-filtering grate in the back-filtering cover plate so as to ensure the stable and reliable arrangement of the back-filtering cover plate.

4) According to the invention, through the arrangement of the radioactive pipeline, the hydraulic reclamation layer can be effectively collected, the water collection effect on the water accumulation area can be ensured, and the precipitation efficiency of the hydraulic reclamation layer is ensured.

5) The invention ensures the tamping effect of the hydraulic filling layer and the strength of the hydraulic filling layer by performing point tamping for multiple times and full tamping, can further ensure the damage to the impermeable layer in the tamping operation process by performing point tamping and full tamping for multiple times, and can also ensure the further outflow of water in the hydraulic filling layer to avoid the newly built building in the hydraulic filling layer from being soaked by a basin.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

Fig. 1 is a schematic diagram illustrating the arrangement of latticed, connected underground drainage underdrains in a gravity flow reclamation type foundation treatment process according to one or more embodiments of the present invention.

Fig. 2 is a schematic side view of a drainage underdrain in a gravity flow fill foundation treatment construction process according to one or more embodiments of the present disclosure.

Fig. 3 is a schematic view of a reverse filter cover plate in a gravity flow blow-fill foundation treatment construction process according to one or more embodiments of the present invention.

Fig. 4 is a schematic view of a zigzag connecting drainage channel in a gravity flow hydraulic fill type foundation treatment construction process according to one or more embodiments of the present invention.

Fig. 5 is a schematic longitudinal cross-sectional view of a drainage channel in a gravity flow fill foundation treatment process according to one or more embodiments of the present invention.

Fig. 6 is a schematic view of a framework for drainage channels in a gravity flow fill foundation treatment process according to one or more embodiments of the present invention.

FIG. 7 is a schematic illustration of a mechanical vibratory arm in a gravity flow reclamation type foundation treatment process according to one or more embodiments of the present invention.

FIG. 8 is a schematic illustration of a sump well arrangement in a gravity flow blow-fill foundation treatment construction process according to one or more embodiments of the present invention.

Fig. 9 is a side view of a sump well arrangement in a gravity flow blow-fill foundation treatment construction process according to one or more embodiments of the present invention.

Fig. 10 is a schematic diagram of a gravity flow reclamation type foundation treatment construction process cultivator plow in accordance with one or more embodiments of the invention.

In the figure: the spacing or dimensions between each other are exaggerated to show the location of the various parts, and the schematic is shown only schematically.

Wherein: 1. the water-collecting type water-saving and water-saving device comprises a drainage closed channel, 2. a drainage well, 3. an inner supporting plate, 4. a reverse filtering cover plate, 5. a reinforcing steel bar, 6. a drainage channel, 7. a drainage channel frame, 8. a connecting hole, 9. a connecting piece, 10. a vibrating motor, 11. a vibrating plate, 12. a pipeline, 13. a water-collecting well, 14. a supporting frame and 15. a deep ploughing hook.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Term interpretation section: the terms "connected," "connected," and "fixed" in the present invention should be understood broadly, for example, they may be fixed, detachable, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.

As introduced in the background art, the problem of great difficulty in drainage of coastal areas exists in the prior art, and in order to solve the technical problem, the invention provides a gravity flow method hydraulic filling type foundation treatment construction process.

In a typical embodiment of the present invention, a gravity flow method hydraulic fill type foundation treatment construction process includes the following steps:

1) ploughing the whole dredger fill salt field area deeply by adopting ploughing equipment to destroy the salt field impermeable layer and the pool bottom film and destroy the impermeable layer;

specifically, the plough equipment includes the plough, refer to fig. 10, through walking equipment like the tractor on the regional top layer of salt pan, the tractor is connected with the plough, the plough includes support frame 14 of being connected with the tractor, the support frame can set up the triangle suspension and be connected with the tractor, one side of support frame 14 sets up three piece at least deep ploughing hooks 15, interval set distance sets up between two adjacent deep ploughing hooks, and deep ploughing hook bending sets up, contained angle between the both sides that deep ploughing hook bent is the obtuse angle, along with the advancing or retreating of tractor, the deep ploughing hook of being convenient for destroys the barrier layer, and deep ploughing hook bottom side thickness is less than the upside, so that the deep ploughing hook enters the salt pan region.

2) Referring to fig. 1, a latticed and communicated underground drainage blind ditch is arranged in the whole hydraulic reclamation area and used for drainage work after hydraulic reclamation is completed, the underground drainage blind ditch leads to a peripheral drainage well of the hydraulic reclamation area, a reverse filtering cover plate made of resin materials is wrapped by reverse filtering geotextile, the reverse filtering cover plate is high in bearing capacity, and the reverse filtering cover plate is covered on the underground drainage blind ditch in an embedded mode, so that precipitation can be accelerated effectively;

the latticed and communicated underground drainage blind ditches are provided with a plurality of rows and a plurality of columns of underground drainage blind ditches which are communicated with each other, the underground drainage blind ditches are uniformly distributed in a reclamation area, the drainage wells are arranged on the periphery of the reclamation area and can be specifically arranged at four corners of the reclamation area, a set distance is reserved between each drainage well and the latticed and communicated underground drainage blind ditches, and a set distance is reserved between each drainage well and the latticed and communicated underground drainage blind ditches through pipelines.

Wherein, the diameter of the drainage well can reach 800-.

The underground drainage blind ditch has a set height, as shown in figure 2, the longitudinal section is U-shaped, the depth is 30-50cm, and can be 40cm, so that the water in the sand layer in the subsequent hydraulic filling layer can naturally flow out, the two sides of the interior of the underground drainage blind ditch are respectively provided with an inner side supporting part 3, and the top of the underground drainage blind ditch is provided with a reverse filtering cover plate 4.

The material of the anti-filter cover plate 4 is a resin material, and in some specific examples, the anti-filter cover plate has a thickness of 30mm, and as shown in fig. 3, in order to enhance the strength of the anti-filter cover plate, the anti-filter cover plate is provided with reinforcing bars 5 in the vertical direction and the lateral direction, respectively.

And the top of the underground drainage blind ditch is provided with an inward step for supporting the anti-filtering cover plate.

Or in other examples, grooves are respectively formed in two sides of the top of the underground drainage blind ditch, protrusions capable of being matched with the grooves are respectively formed in two sides of the lower surface of the anti-filtering cover plate, and the anti-filtering cover plate is supported through the matching of the grooves and the protrusions.

3) Performing hydraulic filling on the hydraulic filling area, wherein the hydraulic filling can be performed by adopting the existing hydraulic filling method to form a hydraulic filling layer;

4) after the hydraulic reclamation, as shown in fig. 4, a zigzag communication type drainage channel is built on the hydraulic reclamation layer and around the hydraulic reclamation layer for later drainage after the construction is completed, the size of the drainage channel is 1 mx 2.5m (depth), the drainage channel can be deepened according to the hydraulic reclamation height, a 1 mx 2.5m composite material such as a composite resin material assembled drainage channel frame 7 (shown in fig. 6) is placed at the top in the drainage channel, the drainage channel frame can also adopt a reinforcing mesh field welding mode, the assembled drainage channel frame is wrapped and fixed firmly by the anti-filtering geotextile, and silt and water are naturally filtered through the anti-filtering geotextile, and the water permeates through the silt and the sewage in the drainage channel is drained by a natural or pumping method, so that the water in the silt layer can transversely and naturally flow out.

Wherein it is easily understood that the width of the top of the drain 6 is greater than the width of the bottom, as shown with reference to fig. 5, for better collection of the sewage.

5) Referring to fig. 8 and 9, a collecting well 13 is arranged on a hydraulic fill layer, holes are distributed on the periphery of the collecting well 13, the outer side of the collecting well is wrapped with a reverse filtering geomembrane, partial collecting wells radiate pipelines 12 towards the periphery at different heights, holes are formed in the surfaces of the pipelines, the pipelines are embedded in silt of the hydraulic fill layer to collect water in the silt and realize communication of partial collecting wells, the pipelines can be (polyphenyl ether) PPE pipelines, the diameter of the pipelines is between 60 and 130mm, the outer side of the pipelines 12 is also wrapped with reverse filtering geotextile, and sewage is collected to the collecting well through the radiated pipelines; and setting time, and discharging water in the water collecting well through a sewage pump to accelerate precipitation in each area.

It is easily understood that the connection of the partial water collecting wells is realized by pipes.

6) To the hydraulic reclamation layer surface that the hydraulic reclamation was accomplished, lay the steel sheet, the steel sheet is the connected type steel sheet of multistage interconnect, the size can be 8mm x 4m x 5m, adopt wide band machinery such as large-scale excavator to walk about reciprocating on the hydraulic reclamation layer surface, mechanical vibration arm vibrates from inside to outside in proper order on the silt surface, through repeated extrusion vibration, make moisture in the silt flow out sooner, under the water-collecting well, return font intercommunication type drainage canal and latticed, under the mutually supporting of intercommunication type underground drainage blind ditch, effectively accelerate the drainage to the hydraulic reclamation layer, long-term waiting has been avoided, too rely on the evaporation of sunlight, the drawback of natural precipitation.

Mechanical vibration arm is including locating the mechanical vibrating motor 10 of broadband, refer to fig. 7 and show, vibrating motor passes through connecting piece 9 and broadband mechanical connection, the connecting piece sets up a plurality of connecting holes, the bolt passes connecting hole 8 and broadband mechanical connection, vibrating motor can set up a plurality ofly, the interval has the distance of setting for between the adjacent vibrating motor, a plurality of vibrating motor are connected to vibration board 11, the vibration board has longer length and width, the vibration board has great area, in order to guarantee the efficiency of single work.

Wherein the enlarged size of the vibrating plate may be 1.5m × 2 m.

7) The tamping machine suitable for construction on the soft foundation is selected to carry out tamping operation construction in a hydraulic filling area, and the hydraulic filling layer is effectively drained before the tamping machine enters, so that the tamping machine can intervene in the construction in advance, the construction period is shortened, the requirement of foundation treatment can be met, and the intervention in advance can be achieved.

The tamping can reach 7-14 m according to different tamping influence depths of the tamping according to the tamping energy, a large crawler-type dynamic compactor is particularly adopted to carry out dynamic compaction on a hydraulic fill layer, the damage to an impermeable layer is mainly embodied in that the impermeable layer can be damaged by fault and dislocation, the purpose of water seepage can be achieved, a tamping pit is mainly arranged on the hydraulic fill layer with the depth of 1m, a salt field below the hydraulic fill layer is an undisturbed soil layer and can also be called as original soil, the bearing capacity of the hydraulic fill layer with good compactness can reach about 120KP-130KP, and therefore excessive sinking cannot occur in the tamping process. The foundation after the tamping treatment reaches 220KP, and most construction requirements can be met.

The use steps of the hydraulic tamping machine are as follows:

1) determining tamping points of a blowing and filling layer in a blowing and filling area;

tamping point distance: the energy-saving type spot-ramming machine is arranged in a square frame, can be arranged in a 4m multiplied by 4m square, and has the spot-ramming energy of more than or equal to 4000KN.

2) And performing point tamping twice, wherein the first point tamping is completed by two times.

The tamping number is: the first point ramming is carried out for the first time, 4-6 times of ramming is carried out at each point, the depth of a ramming pit reaches about 1.5m, the principle of no hammer suction and no hammer deflection is taken, the penetration is not controlled, the ramming energy can be transmitted downwards as much as possible during the first time and the second time of point ramming, and finally, the early-stage preparation is carried out for the average ramming settlement of two times of ramming to meet the design and specification requirements;

the first time and the second time of point ramming, each point is 8-10 times of ramming, and the average ramming amount of the last two times of ramming is less than or equal to 10 cm;

the second point ramming, each point is 8-10 times rammed, and the average ramming amount of the last two times of ramming is less than or equal to 10 cm.

In addition, the first pass and the second pass are performed for the ramming clearance time: the time interval between two times of tamping is more than or equal to 7 days.

3) And (3) full ramming: the first full-compaction tamping energy is 1500KN.m, each point is 2 strikes, the lapping is performed, and the lapping width is 1/4 hammer diameter; and the full-compaction tamping energy of the second time is 1000KN.m, the lapping is tamped, the lapping width is 1/4 hammer diameters, and the characteristic value of the bearing capacity of the treated foundation is not less than 220 kPa.

It should be noted that, a spare road base plate such as a steel plate of a tamping machine is adopted on the surface of the hydraulic filling layer of the hydraulic filling area, and the tamping machine is used for construction on the road base plate when necessary, so that equipment sinking is avoided, and normal tamping construction is ensured.

According to the invention, through the latticed and communicated underground drainage underdrain and the zigzag communicated drainage channel, sewage collection is carried out on the backfill layer through the water collecting well, and the extrusion vibration is carried out on the hydraulic fill layer, so that the methods supplement each other, and a more effective gravity flow method is formed; the underground closed channel can ensure that the drainage of the hydraulic filling silt is more thorough, and the square-back communication type drainage channel can effectively divide the whole hydraulic filling area for drainage; the tree root type water collecting wells are distributed among the square drainage channels to accelerate precipitation in a three-dimensional collection mode;

the whole can achieve the bearing capacity condition of tamping machinery intervention in a short time, the integration of machinery and a construction method is realized, silt and water can be quickly separated, the water content in the silt is reduced to the maximum extent, the construction cost is low, the operability is strong, the dependence degree on natural conditions is low, the requirement of construction period is met, the construction method can be used for areas close to rivers, seas and the like, particularly seas salt field areas with saline-alkali soil and fine sand as main components, and an impermeable layer is damaged by tillage equipment before hydraulic reclamation, so that a newly built building is prevented from being soaked by a basin type; during tamping, under the strong impact of a tamping hammer, the bottom of the tamping pit is expected to be settled by about 1 meter, an impermeable layer, namely a plastic layer is punctured, so that the drainage of pore water is facilitated, and mucky soil at the bottom becomes dense; in the first point ramming, after the plastic film, the mucky soil and other soil in the ramming room are fully mixed, the point ramming and general ramming construction is carried out for two times, and the influence of the point ramming and general ramming on the foundation quality is further reduced.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gravity flow method hydraulic filling type foundation treatment construction process is characterized by comprising the following steps:

deep ploughing the hydraulic filling area to destroy the impervious layer;

performing blow filling on the blow filling area to form a blow filling layer;

extruding and vibrating the hydraulic filling layer, and collecting drainage;

2. The gravity flow method dredger fill type foundation treatment construction process according to claim 1, wherein a plurality of drainage wells are arranged on the periphery of the latticed and communicated underground drainage underdrains, the drainage wells are arranged on the periphery of the dredger fill area, and the drainage wells are communicated with the underground drainage underdrains.

3. The gravity flow method blow-fill type foundation treatment construction process according to claim 1, wherein the reverse filtering cover plate is respectively provided with a steel bar in a vertical direction and a transverse direction;

the top of the underground drainage blind ditch is provided with an inward step for supporting a reverse filtering cover plate through the step;

4. The gravity flow method hydraulic reclamation type foundation treatment construction process according to claim 1, wherein the zigzag communication type drainage channel comprises a plurality of drainage channels, a spliced drainage channel frame is arranged at the top of the drainage channel, and the drainage channel frame is wrapped and firmly fixed by the reversed filter geotextile;

the width of the top of the drainage channel is larger than that of the bottom.

5. The gravity flow method blow-fill type foundation treatment construction process according to claim 1, wherein the blow-fill layer is subjected to extrusion vibration through a mechanical vibration arm, the mechanical vibration arm comprises a vibration motor mechanically connected with a wide belt, and the vibration motor is connected with a vibration plate and is in contact with the blow-fill layer through the vibration plate.

6. The gravity flow method hydraulic reclamation type foundation treatment construction process according to claim 4, wherein before the hydraulic reclamation layer is subjected to extrusion vibration, a plurality of water collecting wells are arranged between the drainage channels of the zigzag communication type drainage channels in the hydraulic reclamation layer, and the water collecting wells are arranged between two adjacent rows of the drainage channels.

7. The gravity flow method hydraulic reclamation type foundation treatment construction process according to claim 6, wherein holes are distributed in the circumferential direction of the water collection wells, pipelines are radiated to the periphery of part of the water collection wells, holes are formed in the surfaces of the pipelines, and the surfaces of the pipelines are wrapped with anti-filtering geotextiles and are buried in the sediment of the hydraulic reclamation layer to collect water in the sediment and realize communication of part of the water collection wells.

8. The gravity flow method hydraulic reclamation type foundation treatment construction process according to claim 1, wherein the tamping operation construction on the hydraulic reclamation layer through the tamping machinery comprises the following steps:

performing point ramming on the hydraulic filling layer twice, wherein the first point ramming is completed in two times, and the interval time between the two times of ramming is more than or equal to 7 days;

and fully tamping the hydraulic filling layer.

9. The gravity flow method hydraulic reclamation type foundation treatment construction process according to claim 8, wherein the full ramming of the hydraulic reclamation layer comprises the following steps: tamping points of the blown-filling layer twice, wherein each tamping point is tamped at least twice in the first full tamping, and is lap-jointed tamping; the second full-compaction tamping energy is less than the first full-compaction tamping energy, and the second full-compaction tamping energy is lapping tamping;