CN113897995A

CN113897995A - Method for treating water plant foundation in mining area of mine

Info

Publication number: CN113897995A
Application number: CN202111212555.9A
Authority: CN
Inventors: 李斌; 张锦良; 杨国威; 褚琪超; 谢超
Original assignee: Zhejiang Dadongwu Group Construction Co Ltd
Current assignee: Zhejiang Dadongwu Group Construction Co Ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-01-07

Abstract

A method for treating a water plant foundation in a mining area of a mine relates to the technical field of special geological foundation treatment and comprises the following steps: s1, equipment before piling: excavating a foundation pit, and pouring a reinforced concrete well ring; s2, tube making: vertically driving an outer ring cylinder along a reinforced concrete well ring, cleaning sludge, water and miscellaneous stones in the outer ring cylinder, and leveling the bottom; s3, piling: vertically driving a pile body with a hollow interior into the foundation pit; s4, pouring: hoisting a reinforcement cage in the pile body, and pouring concrete in the pile body; s5, taking a barrel: after the concrete in the pile body is solidified, a cylinder taking mechanism is abutted against the inner wall of the outer ring cylinder, and the outer ring cylinder is taken out through the traction of the cylinder taking mechanism and is recycled; s6, pile driver displacement: and moving the pile driver and the outer ring barrel to the next pile point, and repeating the steps. This application possess an outer ring section of thick bamboo that is used for forming good internal environment, and an outer ring section of thick bamboo takes out through getting a section of thick bamboo structure, and reuse save material.

Description

Method for treating water plant foundation in mining area of mine

Technical Field

The invention relates to the technical field of special geological foundation treatment, in particular to a method for treating a water plant foundation in a mining area of a mine.

Background

At present, the society and the economy of China are in a rapid development stage, the scale of domestic construction engineering is continuously enlarged, the construction of a large number of high-rise and super high-rise buildings and large public infrastructures is concentrated, the construction is continuously developed towards the underground in order to ensure the basic requirements of each party, benefits are required towards the underground, and the construction of deep foundation pit engineering is more important. Meanwhile, as the main structure of the building is increased, the deeper the embedding depth of the building is, and thus the construction quality requirement on the deep foundation pit engineering is improved. Deep foundation pit engineering is an important link in construction of high-rise buildings, super high-rise buildings and large public infrastructures, and deep foundation pit support technology is the key for guaranteeing construction quality of deep foundation pit engineering.

As large volumes of land are redistributed integrally, many geologically specific lands get new plans, such as: after the mining of the mine field is finished, the mining value of the mine field can be pumped out, but the land area still exists, and if the area is reasonably utilized, the application area of the functional building land can be saved for the country. However, the recycling of the soil conditions such as mines and farming lands is accompanied by the dilemma of piling a lot, the mines have a lot of broken stones, excavated pits and holes, even some mines can be communicated with underground rivers, the farming lands have more soil which is a soft soil structure, the filling coefficient is too large during piling in the actual construction process of the two geological structures, the difficulty of reconstruction is large, the investment of capital is higher, and in some places, after the mines are excavated, the mines can be refilled as agricultural cultivated lands within a period of time.

For example: the Chinese invention patent with the application number of 201710295401.8 discloses a immersed tube cast-in-place pile and a construction process thereof, wherein the immersed tube cast-in-place pile relates to a pile tip, a pile tube, a geotextile bag, a pile body and a reinforcement cage, and the process flow is as follows: positioning a pile tip; sinking the pipe; putting the earthwork cloth bag; pouring concrete; hoisting a reinforcement cage; tube drawing; and (5) molding. This application has avoided the common problems such as necking pile, disconnected stake, hanging foot stake, stake point intake among the traditional immersed tube bored concrete pile technology, has guaranteed the shaping of bored concrete pile to the bearing capacity of stake has been increased effectively.

However, the inventor of the present application finds that the above technical solutions have at least the following technical problems:

the mechanism that this technical scheme relates wants to take out the sleeve and probably need cooperate other large-scale machinery just can extract, and secondly, this pile-forming mode is follow-up can't carry out the compaction to cement through other compacting mechanism, and the inside cement density of post after the shaping is low can cause the possibility that the bubble appears in inside even because of the reason of pulling the pile pipe, consequently, the quality of post must not be ensured, appears the safety problem easily.

Disclosure of Invention

A method for treating a water plant foundation in a mining area of a mine comprises the following steps: s1, equipment before piling: excavating a foundation pit, and pouring a reinforced concrete well ring; s2, tube making: vertically driving an outer ring cylinder along a reinforced concrete well ring, cleaning sludge, water and miscellaneous stones in the outer ring cylinder, and leveling the bottom; s3, piling: vertically driving a pile body with a hollow interior into the foundation pit; s4, pouring: hoisting a reinforcement cage in the pile body, and pouring concrete in the pile body; s5, taking a barrel: after the concrete in the pile body is solidified, a cylinder taking mechanism is abutted against the inner wall of the outer ring cylinder, and the outer ring cylinder is taken out through the traction of the cylinder taking mechanism and is recycled; s6, pile driver displacement: and moving the pile driver and the outer ring barrel to the next pile point, and repeating the steps.

Preferably, in the above technical solution, an accommodating gap is provided between the outer ring cylinder and the pile body, and the outer ring cylinder and the pile body are coaxially arranged.

Preferably, the inner wall surface of the outer ring barrel is provided with a plurality of racks which are uniformly distributed, the racks are arranged in the accommodating gap, and the plurality of racks are arranged along the axial direction of the outer ring barrel; get a section of thick bamboo mechanism detachably set up in on the pile body, get a section of thick bamboo mechanism contain power box and a plurality of set up in promote the gear on the power box, a plurality of promote the gear by power box provides power, promote the gear quantity with the quantity of rack is the same, every it corresponds one respectively to promote the gear rack toothing.

Preferably, in step S2, the outer surface of the outer tube is covered with a civil cloth bag.

Preferably, in the step S3, the upper end surface of the driven pile body is 0.1 to 0.2 meters higher than the upper end of the reinforced concrete well curb, and the upper end surface of the concrete filled in the pile body is 0.05 to 0.1 meters higher than the upper end of the reinforced concrete well curb; and after the concrete is condensed and the outer ring cylinder is taken out, cutting off the part of the pile body higher than the condensed concrete, and keeping the upper end surface of the condensed concrete and the upper end surface of the cut-off pile body horizontal.

Preferably, the pile body comprises a pile body and a pile tip for sinking into soil, and the pile body is made of a steel cylinder; the pile tip is made of a conical steel block or a prefabricated conical reinforced concrete block.

Preferably, in step S4, the concrete is delivered into the pile body by a concrete pump, and the concrete in the pile body is compacted by a concrete vibrator.

Preferably, an electromagnet is fixedly arranged below the tube taking mechanism, the tube taking mechanism is arranged above the pile body, and the electromagnet abuts against the inner wall of the pile body.

In summary, the invention has the following advantages:

1. the outer environment of a piling area can be effectively isolated, sundries are prevented from entering and the forming quality of the pile is influenced, the quality of the pile is not reduced due to the fact that the sundries and concrete are mixed, after all, the concrete is injected into the pile, and the external sludge, water and sundry stones are mainly prevented from entering the piling area, so that the piling precision is influenced;

2. furthermore, the outer ring barrel for forming a good inner environment can be taken out through the barrel taking structure and recycled, so that materials are saved;

3. furthermore, the cylinder taking mechanism for taking out the outer ring cylinder is convenient and simple to use, can be used only by being placed on the pile body after the position of the pile body is adjusted, and can also enable the pile body to be matched with the ground bottom more tightly due to the downward pressing force of the pile body.

In addition, the beneficial effects not referred to will be explained in the embodiments.

Drawings

FIG. 1 is a solid diagram of the relative arrangement relationship of the pile body, the outer ring barrel and the barrel taking mechanism in the present application;

FIG. 2 is a schematic view of the present application in the form of an outer collar;

fig. 3 is an enlarged view of region a of fig. 2.

Detailed Description

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like as referred to or as may be referred to in this specification are defined with respect to the configuration shown in the drawings, and the terms "inner" and "outer" refer to directions toward and away from the geometric center of a particular component and are relative terms, and thus may be changed accordingly depending on the position and the state of use of the particular component. Therefore, these and other directional terms should not be construed as limiting terms.

The invention is further illustrated by the following examples:

example (b):

a method for treating a water plant foundation in a mining area of a mine comprises the following steps:

s1, preparation before piling: the position of a pile to be driven is determined through design, then a foundation pit hole is excavated through a manual or large-scale machine mode, when the depth reaches 1-1.2 m, excavation is stopped, a reinforced concrete well collar 3 is poured at the opening of the foundation pit hole through an annular mold, and the reinforced concrete well collar 3 can be 0.06-0.1 m higher than a water level.

What need guarantee among the above-mentioned step is that reinforced concrete walling crib 3's up end is parallel with the horizontal plane, and reinforced concrete walling crib 3's hole is cylindrical, and this columniform hole is perpendicular with the horizontal plane.

S2, tube making: the outer ring barrel 2 is perpendicularly driven into the reinforced concrete well ring 3, the outer diameter of the outer ring barrel 2 is the same as the inner diameter of a hole of the reinforced concrete well ring 3, the outer ring barrel 2 is perpendicularly driven into the reinforced concrete well ring 3 in a guiding mode, a blocked outer ring barrel inner environment and an outer ring barrel outer environment are formed, sludge, water and miscellaneous stones in the outer ring barrel inner environment are cleaned, and the bottom is leveled.

In the above steps, the purpose of driving the outer ring barrel 2 is to easily cause the condition that sundry stones, sludge and water are gathered to the center position of the foundation pit due to loose and soft soil in the foundation pit in a mining area of a mine or an agricultural land area, and the outer ring barrel 2 can effectively isolate the environment and keep the area needing to be driven dry and flat.

S3, piling: driving a hollow pile body 1 into a foundation pit through a pile driver; when piling, the pile body 1 and the outer ring barrel 2 are coaxially arranged; the pile body 1 is at least embedded into the flat bottom of the outer ring barrel by 0.8-1 meter.

The pile body 1 comprises a pile body 11 and a pile tip 12 for sinking into soil, wherein the pile body 11 is made of a steel cylinder; the pile tip 12 is made of a conical steel block or a prefabricated conical reinforced concrete block.

S4, pouring: and (2) hoisting a reinforcement cage in the hollow pile body 1 and pouring concrete in the pile body 1, conveying the concrete into the pile body 1 through a concrete pump, and vibrating and compacting the concrete in the pile body 1 by a concrete vibrator.

When pouring, attention needs to be paid to adding an expanding agent to prevent concrete shrinkage from influencing the forming condition of the whole pile body 1, and the formed pile body 1 needs to ensure that the height of the upper end surface is higher than that of the reinforced concrete well ring, so that the pile body 1 can be ensured to support the bottom of a building, therefore, in the step S3, the upper end surface of the driven pile body 1 is 0.1-0.2 meter higher than the upper end of the reinforced concrete well ring 3, and the upper end surface of concrete filled in the pile body 1 is 0.05-0.1 meter higher than the upper end of the reinforced concrete well ring 3; after the concrete is condensed and the outer ring barrel 2 is taken out, the part of the pile body 1 higher than the condensed concrete is cut off, so that the upper end surface of the condensed concrete and the upper end surface of the cut-off pile body 1 are kept horizontal.

S5, taking a barrel: after concrete in the pile body 1 is solidified, an accommodating gap is formed between the pile body 1 and the outer ring barrel 2, the inner wall of the outer ring barrel 2 is abutted against the barrel taking mechanism 4, the outer ring barrel 2 is taken out through traction of the barrel taking mechanism 4, the barrel taking mechanism 4 is taken down from the pile body 1 after the outer ring barrel 2 is taken out, and the outer ring barrel 2 and the barrel taking mechanism 3 are repeatedly utilized.

Referring to fig. 1 to 3, in the present application, four racks 21 are disposed on an inner wall surface of the outer ring cylinder 2 and are uniformly distributed along an axial direction of the outer ring cylinder 2, the four racks 21 are located in the accommodating gap, the cylinder taking mechanism 4 includes a power box 41 and four lifting gears 42, the power box 41 includes a motor and a gear set structure, the gear set structure simultaneously controls the four lifting gears 42 to rotate around a central axis thereof at the same speed, the four lifting gears 42 are rotatably disposed on a fixed shaft inside the power box 41 through bearings, the four lifting gears 42 rotate in a direction of lifting the outer ring cylinder 2, as shown by a solid arrow j1 in fig. 2, when the cylinder taking mechanism 4 is disposed in the outer ring cylinder 2, the four lifting gears 42 of the cylinder taking mechanism 4 are respectively engaged with the four racks 21 in the outer ring cylinder 2, as shown in fig. 3. An electromagnet 43 is fixedly arranged below the tube taking mechanism 4, the tube taking mechanism 4 is arranged above the pile body 1, and the electromagnet 43 is abutted against the inner wall of the pile body 1. The electromagnet 43 and the power box 41 are electrically connected with a PLC (not shown in the figure), and when the PLC controls the power box 41 to be started, the electromagnet 43 is controlled to be started simultaneously, so that the cylinder taking mechanism 4 is tightly matched with the cylinder 1, and the shaking is prevented.

Under the interaction of the lifting gear 42 and the rack 21, the four lifting gears 42 provide a downward pressure to the four connecting fixed shafts in the power box 41, that is, the whole power box 41 provides a downward pressure to the whole pile body 11 under the interaction of the lifting gear 42 and the rack 21, so as to tighten the matching relationship between the pile body 1 and the ground, although the effect may be very small, the tube taking mechanism 4 is mainly used for providing an upward traction force to the outer ring tube 2, so that the outer ring tube 2 is pulled out in the foundation pit, and thus the outer ring tube 2 can be reused when a pile is driven next. In another embodiment, a bag made of oil and fat substances can be coated on the outer surface of the outer barrel ring 2 in the step of rolling, and the bag made of oil and fat substances can be soaked in the bag made of oil and fat substances before being placed in the bag made of oil and fat substances to improve the friction force of the surface.

S6, pile driver displacement: moving the pile driver and the outer ring barrel to the next pile point, and repeating the steps

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for treating a water plant foundation in a mining area of a mine is characterized by comprising the following steps:

s1, equipment before piling: excavating a foundation pit, and pouring a reinforced concrete well ring (3);

s2, tube making: vertically driving an outer ring barrel (2) along a reinforced concrete well ring, cleaning sludge, water and miscellaneous stones in the outer ring barrel (2), and leveling the bottom;

s3, piling: vertically driving a pile body (1) with a hollow interior into a foundation pit;

s4, pouring: hoisting a reinforcement cage in the pile body (1), and pouring concrete in the pile body (1);

s5, taking a barrel: after concrete in the pile body is solidified, a cylinder taking mechanism (4) is abutted against the inner wall of the outer ring cylinder (2), and the outer ring cylinder (2) is taken out through traction of the cylinder taking mechanism (4) for recycling;

s6, pile driver displacement: and moving the pile driver and the outer ring barrel (2) to the next pile point, and repeating the steps.

2. The method for treating the water plant foundation in the mined-out area according to claim 1, characterized in that: an accommodating gap is formed between the outer ring barrel (3) and the pile body (1), and the outer ring barrel (3) and the pile body (1) are coaxially arranged.

3. The method for treating the water plant foundation in the mined-out area according to claim 1, characterized in that: a plurality of racks (21) which are uniformly distributed are arranged on the inner wall surface of the outer ring barrel (2), the racks (21) are arranged in the accommodating gap, and the plurality of racks (21) are axially arranged along the outer ring barrel (2); get a section of thick bamboo mechanism (4) detachably set up in on the pile body (1), get a section of thick bamboo mechanism (4) contain power box (41) and a plurality of set up in promote gear (42), a plurality of on power box (41) promote gear (42) by power box (41) power, promote the quantity of gear (42) with the quantity of rack (21) is the same, every promote gear (42) and correspond one respectively rack (21) meshing.

4. The method for treating the water plant foundation in the mined-out area of the mine according to claims 1 to 3, characterized by comprising the following steps: in step S2, the outer surface of the outer ring cylinder (2) is coated with a civil cloth bag.

5. The method for treating the water plant foundation in the mined-out area according to claim 3, characterized in that: in the step S3, the upper end face of the driven pile body (1) is 0.1-0.2 m higher than the upper end of the reinforced concrete well curb (3), and the upper end face of the concrete filled in the pile body (1) is 0.05-0.1 m higher than the upper end of the reinforced concrete well curb (3); and after the concrete is condensed and the outer ring barrel (2) is taken out, cutting off the part of the pile body (1) higher than the condensed concrete, and keeping the upper end surface of the condensed concrete and the upper end surface of the cut-off pile body (1) horizontal.

6. The method for treating the water plant foundation in the mined-out area according to claim 1, characterized in that: the pile body (1) comprises a pile body (11) and a pile tip (12) for sinking into soil, wherein the pile body (11) is made of a steel cylinder; the pile tip (12) is made of a conical steel block or a prefabricated conical reinforced concrete block.

7. The method for treating the water plant foundation in the mined-out area according to claim 1, characterized in that: in step S4, the concrete is delivered into the pile body (1) by a concrete pump, and the concrete inside the pile body is vibrated to be dense by a concrete vibrator.

8. The method for treating the water plant foundation in the mined-out area according to claim 5, characterized in that: get a fixed electro-magnet (43) that is provided with in a section of thick bamboo mechanism (4) below, get a section of thick bamboo mechanism (4) set up in the top of pile body (1), electro-magnet (43) support and lean on pile body (1) inner wall.