CN114439043A

CN114439043A - Construction device and construction method for horsehole

Info

Publication number: CN114439043A
Application number: CN202111673573.7A
Authority: CN
Inventors: 范晓翔; 李宙鼎; 郝英雷; 罗干
Original assignee: Shanghai Mechanized Construction Group Co Ltd
Current assignee: Shanghai Mechanized Construction Group Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-06

Abstract

The invention relates to the technical field of pipeline engineering, and discloses a construction device and a construction method of a horseback hole. The first casing pipe is placed to the design depth in advance through the pipe shaking machine, soil bodies around the first casing pipe can be effectively separated during excavation, influences on the surrounding environment during excavation are reduced, and operation safety during welding of the shaft wall of the horse riding well and the first casing pipe can be improved. A pouring cavity is formed between the first sleeve and the second sleeve, and concrete is poured in the pouring cavity to form the horseback riding well. The second sleeve pipe has reduced a formwork as the centre form that the well was pour on the horse, can provide bigger space for constructor borehole operation, and protection constructor safety shortens the activity duration simultaneously, improves the efficiency of construction, and then shortens construction cycle.

Description

Construction device and construction method for horsehole

Technical Field

The invention relates to the technical field of pipeline engineering, in particular to a construction device and a construction method of a horsewell.

Background

The horse riding well is a special inspection well additionally built on a pipeline, for example, after pipe jacking construction is completed, a shaft (namely the horse riding well) is made above a built underground pipeline (namely the pipe jacking), and after the pipeline is built to be water-filled, the shaft can provide a passage for maintenance personnel to go down a well for inspection.

For the horseback riding well in a general environment, because the earth covering is not deep, a high-pressure jet grouting pile is usually adopted as a building envelope, then downward excavation is carried out through machinery or manpower, a hole is reserved on a special pipe joint externally coated with a steel plate during pipe jacking construction, and a concrete well barrel is poured. However, the construction method cannot be adopted for the horse riding well which is positioned close to a main road, a city street, a historical protective building or an important pipeline. The construction method has large disturbance to the soil body in the construction process, can generate great influence on the surrounding environment and buildings, and cannot meet the construction requirements. In addition, for pipelines with deep depth, partial residual soil in the excavation stage needs to be removed by a deep well manually, and the construction method has the defects that the space in the well is narrow and small due to the fact that illumination, fresh air equipment and the like need to be arranged during excavation, the underground operation of constructors is difficult, the operation time in a closed space is long, and great potential safety hazards exist.

Disclosure of Invention

Based on the above problems, the present invention aims to provide a construction device and a construction method for a horseback, which have simple construction procedures and easy operation, can reduce the influence of excavation operation on the surrounding environment and buildings, reduce formwork support, reduce the underground operation time of constructors, improve the construction efficiency and the construction safety, shorten the construction period, and are more economical and practical.

In order to achieve the purpose, the invention adopts the following technical scheme:

in one aspect, there is provided a construction device for a horse riding well, comprising:

a pipe shaking machine;

the first sleeve is rocked to a preset construction position of the horsewell through the pipe rocking machine and is connected with a jacking pipe;

the MJS construction method piles are arranged at the preset construction position of the riding well in a surrounding manner along the circumferential direction;

the excavating equipment is used for excavating the soil material in the first sleeve;

and the second sleeve is coaxially arranged in the first sleeve at intervals and is connected with the top pipe, and concrete is poured between the first sleeve and the second sleeve to form the horse riding well.

As a preferable aspect of the construction device for a horse-riding well according to the present invention, the opening edge of the end of the first casing inserted into the ground is provided with a plurality of pointed structures at intervals in the circumferential direction.

As a preferable aspect of the construction apparatus for a horse-riding well according to the present invention, the first casing includes a plurality of connected pipe sections, and each two adjacent pipe sections are welded to each other.

As a preferable aspect of the construction device for a horsewell according to the present invention, the excavating equipment includes a boom excavator and a telescopic arm excavator, the first stage soil in the first casing is excavated by the boom excavator, the second stage soil in the first casing is excavated by the telescopic arm excavator, and a depth of the second stage soil is greater than a depth of the first stage soil.

As a preferred scheme of the construction device of the horsewell, a connecting plate is annularly arranged on the outer wall of the jacking pipe, and the jacking pipe is connected with the first sleeve through the connecting plate.

As a preferable aspect of the construction device for a horse riding well according to the present invention, a partition plate is provided at an opening at a top end in the first casing, and a cover plate is provided at a top end cover of the first casing.

As a preferable aspect of the construction device of a horsewell according to the present invention, the first casing is made of a steel material, and the second casing is made of a polyethylene material.

As a preferable mode of the construction device of the horsehole, the first sleeve is provided with a first embedded single-wall pipe, and the second sleeve is internally provided with a second embedded single-wall pipe.

As a preferable scheme of the construction device of the horsewell, a plurality of grouting holes are formed in the bottom of the jacking pipe.

In another aspect, there is provided a construction method of a horse-riding well, which uses the above-mentioned construction apparatus of a horse-riding well, comprising the steps of:

erecting the piles in the MJS construction method by adopting a construction method of 180-degree swinging and spraying in the MJS construction method to form a surrounding structure;

adopting the pipe shaking machine to shake the first sleeve pipe to a preset construction position of the horsewell, so that the first sleeve pipe extends to be in contact with the underground jacking pipe;

digging out the soil material in the first casing pipe by using the digging equipment;

after the excavation is finished, fixedly connecting the bottom end of the first casing pipe with the outer wall of the top pipe, and forming a through hole in the top pipe;

lowering the second casing pipe in the first casing pipe, and fixedly connecting the bottom end of the second casing pipe with the outer wall of the top pipe;

casting concrete between the first and second casings to form the horsewell.

The invention has the beneficial effects that:

the invention provides a construction device and a construction method of a horsehole, wherein an MJS construction method pile is erected by adopting a construction method of 180-degree swinging and spraying in an MJS construction method to form a surrounding structure, and then a first sleeve is rocked to a preset construction position of the horsehole through a tube rocking machine. The MJS construction method can effectively reduce the influence of soil extrusion, bulging and the like on the surrounding environment and buildings caused by overhigh pressure in the ground during foundation treatment, the enclosure structure can be used as a waterproof curtain to ensure the construction safety in the excavation process, and the waterproof effect is good. The first casing pipe is placed to the design depth in advance through the pipe shaking machine, soil bodies around the first casing pipe can be effectively separated during excavation, influences on the surrounding environment during excavation are reduced, and operation safety during welding of the shaft wall of the horse riding well and the first casing pipe can be improved. After excavating the soil in the first sleeve by utilizing excavating equipment, firstly connecting the first sleeve with the outer wall of the top pipe, then lowering the second sleeve into the first sleeve, fixedly connecting the second sleeve with the outer wall of the top pipe, forming a pouring cavity between the first sleeve and the second sleeve, pouring concrete in the pouring cavity, and forming the horse riding well after the concrete is formed. The setting of second sleeve pipe makes it can regard as the centre form that the horse-riding well was pour to reduce a formwork, can provide bigger space for constructor borehole operation, shortened the activity duration, and then shortened construction cycle, constructor's safety can be ensured to great activity space simultaneously. The construction method of the horsewell has the advantages of simple construction process, easy implementation, effective improvement of construction efficiency and good economic benefit.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a sectional view of a construction apparatus for a horse-riding well according to an embodiment of the present invention;

FIG. 2 is a top view of a construction apparatus for a horsewell according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a completed horsewell according to an embodiment of the present invention.

In the figure:

1-shaking the pipe machine; 2-MJS construction method pile; 3-a first sleeve; 4-a second sleeve; 5-a separator; 6-cover plate;

7-a first pre-buried single-process wall pipe; 8-a second pre-buried single-process wall pipe;

100-pipe jacking; 101-a connecting plate; 102-a through hole; 103-grouting holes; 200-concrete; 300-ground.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The MJS construction method is a short for an omnibearing high-pressure injection technology. The MJS construction method adopts an omnibearing high-pressure jet grouting machine for construction, the construction method can be used for ultra-deep reinforcement and horizontal stratum or inclined stratum reinforcement, and the whole system is characterized by being provided with an automatic device for regulating and controlling and measuring the underground pressure. The MJS construction method adopts a unique perforated pipe and a front end generating device on the basis of the traditional high-pressure jet grouting process, realizes the forced slurry discharge in holes and the monitoring of the underground pressure, controls the underground pressure by adjusting the forced slurry discharge, greatly reduces the influence on the surrounding environment and is very favorable for protecting the surrounding environment.

As shown in fig. 1 to 3, the present embodiment provides a construction apparatus for a saddle-riding well, which includes a pipe shaker 1, a first casing 3, an MJS construction method pile 2, an excavating device, and a second casing 4.

The pipe shaking machine 1 is used for shaking the first sleeve 3 to a preset construction position of a horse riding well, and the bottom end of the first sleeve 3 is connected with the jacking pipe 100. The MJS construction method piles 2 are used for surrounding and forming an enclosure structure in the circumferential direction of a preset construction position of the horseback. Excavating equipment is used for excavating the soil material in first sleeve 3, and after the soil material in first sleeve 3 excavated, first sleeve 3 formed the external mold that the horse-riding well was pour. The second sleeve 4 is coaxially arranged in the first sleeve 3 at intervals to form an inner membrane of the horsewell, and concrete 200 is poured between the first sleeve 3 and the second sleeve 4. In this embodiment, self-compacting concrete is preferably poured.

In the embodiment, the MJS construction method is adopted to erect the MJS construction method pile 2 by 180-degree swing jetting to form a building envelope, and then the pipe shaking machine 1 is used for shaking the first sleeve 3 to a preset construction position of the horsehole. The MJS construction method can effectively reduce the influence of soil body extrusion, uplift and the like on the surrounding environment and buildings caused by overhigh pressure in the ground during foundation treatment, the enclosure structure can be used as a waterproof curtain to ensure the construction safety in the excavation process, and the waterproof effect is good. First sleeve pipe 3 is transferred to the design depth in advance through rocking tube machine 1, can effectively cut off the soil body on every side during the excavation, to the influence of all ring edge borders during the reduction excavation to operation security when can increase the horse-riding well wall of a well and first sleeve pipe 3 welding. After the soil in the first sleeve 3 is excavated by the excavating equipment, the first sleeve 3 is connected with the outer wall of the top pipe 100, then the second sleeve 4 is placed in the first sleeve 3 and fixedly connected with the outer wall of the top pipe 100, a pouring cavity is formed between the first sleeve 3 and the second sleeve 4, concrete 200 is poured in the pouring cavity, and the horse riding well is formed after the concrete 200 is formed. The setting of second sleeve 4 makes it can regard as the centre form that the horse-riding well was pour to reduce a formwork, can provide bigger space for constructor borehole operation, shortened the activity duration, and then shortened construction cycle, constructor's safety can be ensured to great activity space simultaneously.

Optionally, first sleeve 3 inserts and is provided with a plurality of point shape structures along circumference interval on the opening border of secret one end, and a plurality of point shape structures can reduce the resistance when first sleeve 3 moves down, and the first sleeve 3 of being convenient for shakes the pipe smoothly to predetermineeing the construction position. Illustratively, a sawtooth structure may be machined in the circumferential direction at the end of the first sleeve 3, the length of the sawtooth being 10 cm.

Optionally, the first casing 3 comprises a plurality of connected pipe sections, and each two adjacent pipe sections are welded. During specific construction, a pipe section is clamped through a clamping ring of the pipe shaking machine 1 (the pointed structure is arranged at one end, inserted into the ground, of the pipe section), the pipe section is pressed into the ground to a preset position (the top of the pipe section is exposed out of the ground 300), then the pipe shaking machine 1 loosens the pipe section to clamp the next pipe section, the next pipe section is in butt joint with the pipe section pressed into the ground and welded, and then the pipe shaking is continued. And repeating the steps until the lowering depth of the first casing 3 meets the design requirement of the horsehole. The number of pipe sections included in the first casing 3 is chosen according to the depth of the horseback, and for example, each pipe section has a length of 2m, and if the horseback has a depth of 17.8m, 9 pipe sections may be used.

Further, the two adjacent pipe sections are welded up and down in a 45-degree groove welding mode, the depth of a welding line needs to meet 14mm, and the overall strength of the first sleeve 3 is guaranteed.

Optionally, the excavating equipment comprises a sliding arm excavator and a telescopic arm excavator, the first-stage soil in the first sleeve 3 is excavated by the sliding arm excavator, the second-stage soil in the first sleeve 3 is excavated by the telescopic arm excavator, and the depth of the second-stage soil is greater than that of the first-stage soil. Taking a 23m deep horse riding well as an example, the soil material in the first sleeve 3 before 9m downwards from the ground 300 is excavated by a sliding arm excavator, and the soil material at the 9m-23m downwards is excavated by a telescopic arm excavator, so that the construction equipment is reasonably utilized, and the construction cost is saved. The residual soil at the bottommost part of the first sleeve 3 needs to be cleaned and transported out by a constructor from the bottom, and meanwhile, manual trimming and tidying are carried out.

Optionally, referring to fig. 1 and 2, a connecting plate 101 is annularly arranged on the outer wall of the top pipe 100, and the top pipe 100 is connected with the first sleeve 3 through the connecting plate 101. In this embodiment, the connecting plate 101 is an annular steel plate preset on the top pipe 100 in advance, and is prepared for the connection between the first sleeve 3 and the top pipe 100 at a later stage. After the soil material clean up in first sleeve 3, constructor down to first sleeve 3's bottom, with first sleeve 3 and connecting plate 101 welding, specifically, all weld firmly with connecting plate 101 with first sleeve 3 inner wall along circumference, guarantees that first sleeve 3 is fixed stable.

Referring to fig. 1 and 3, after the first casing 3 is fixed, a through hole 102 is formed in the pipe wall of the top pipe 100, the through hole 102 is opposite to the inner cavity of the first casing 3, the through hole 102 is used for providing a passage for later pipeline maintenance, and the diameter of the through hole 102 is slightly smaller than that of the second casing 4, so that the second casing 4 is connected with the top pipe 100. After the through hole 102 on the top pipe 100 is opened, the second sleeve 4 is lowered into the first sleeve 3, and the bottom end of the second sleeve 4 is fixedly connected with the connecting plate 101 on the top pipe 100. In this embodiment, the second casing 4 is fixed by using the fine aggregate concrete, specifically, the fine aggregate concrete is coated in the circumferential direction at the position where the bottom of the second casing 4 contacts the connecting plate 101, and after the fine aggregate concrete is set and solidified, the second casing 4 is fixed.

Optionally, in this embodiment, the first sleeve 3 is made of a steel material, and has sufficient structural strength, so that the requirement of lowering the swing pipe can be met. The second sleeve 4 is made of polyethylene (for example, HDPE), so that the second sleeve 4 has acid resistance and salt and alkali resistance, meets the anticorrosion requirement of the horsewell, does not need to be coated with an anticorrosion material, and saves anticorrosion construction steps.

Alternatively, referring to fig. 1 and 3, the bottom of the top pipe 100 is provided with a plurality of grouting holes 103. The grouting holes 103 are arranged to press grout outside the pipe through the grouting holes 103 so as to fill gaps outside the pipe, increase the strength of the bottom of the top pipe 100 and reduce settlement. The grouting holes 103 may be arranged according to different purposes and requirements, such as semi-circular (arch), row-type, etc.

Optionally, referring to fig. 3, a partition plate 5 is disposed at the top opening in the first sleeve 3, and the partition plate 5 is used for preventing foreign objects from falling into the horse riding well, so that the safety is improved, and meanwhile, impurities can be shielded, and the lower pipeline is prevented from being plugged. The partition 5 is preferably a mesh plate to avoid complete sealing of the horse-riding well while at the same time being able to filter impurities. Further, the top end of the first sleeve 3 is covered with a cover plate 6. The cover plate 6 is made of concrete and can cover the wellhead of the riding well, so that the safety is further improved, and foreign objects are prevented from accidentally falling off the riding well.

Alternatively, referring to fig. 1 and 3, a first pre-buried single wall pipe 7 is provided on the first casing pipe 3, and a second pre-buried single wall pipe 8 is provided in the second casing pipe 4. If have a large amount of water to gush out in the pipeline, pressure in the pipeline can be cushioned to first pre-buried single method wall pipe 7 and the pre-buried single method wall pipe 8 homoenergetic of second, avoids the water in the pipeline directly to gush out the horse riding well. In this embodiment, the flange plate on the second pre-buried single method wall pipe 8 is blind flange, can prevent on the one hand that water from gushing out the horse riding well, and on the other hand can further prevent that foreign object from falling.

Referring to fig. 1 to 3, the present embodiment further provides a construction method of a horsewell, which adopts the above construction apparatus, and specifically includes the following steps:

(1) erecting an MJS construction method pile 2 by adopting an MJS construction method of 180-degree swing spraying to form an enclosure structure;

(2) adopting a pipe shaking machine 1 to shake the first sleeve 3 to a preset construction position of the horsewell, so that the first sleeve 3 extends to be in contact with an underground top pipe 100;

(3) digging out the soil in the first sleeve 3 by using digging equipment;

(4) after the excavation is finished, fixedly connecting the bottom end of the first sleeve 3 with the outer wall of the top pipe 100, and forming a through hole 102 in the top pipe 100;

(5) a second sleeve 4 is lowered in the first sleeve 3, and the bottom end of the second sleeve 4 is fixedly connected with the outer wall of the top pipe 100;

(6) concrete 200 is poured between the first and

second casings

3, 4 to form the horsewell.

In the embodiment, in the step (2), the MJS construction method is adopted to perform 180-degree swinging spraying construction, namely, half-range rotation can further reduce the influence of construction on the surrounding environment and buildings. Meanwhile, the enclosure structure formed by the MJS piles has a good water stopping effect, and the influence on the surrounding environment can be avoided.

The construction method of the horsewell provided by the embodiment has the advantages of simple construction process, easiness in implementation, capability of effectively improving the construction efficiency and good economic benefit.

Taking a certain construction project as an example, the construction method of the horsewell is adopted for construction, the plurality of pipe sections of the first casing 3 are all steel casings, and specific parameters are shown in tables 1 and 2.

TABLE 1 MJS construction method 180 degree swinging spray construction parameters

Serial number

Content providing method and apparatus

Parameter(s)

Serial number

Content providing method and apparatus

Parameter(s)

1

Pile diameter

2600mm (half width)

10

Pile forming angle error control

≦1/100

2

Water cement ratio

1:1

11

Speed of lifting

25～40min/m

3

Pressure of cement slurry

40MPa

12

Step distance travel

25cm～4cm

4

Flow rate of cement slurry

90L/min

13

Step rise time

60s

5

Main air pressure

0.7～1.05MPa

14

Rotational speed

3～5rpm

6

Main air flow

1.0～2.0Nm3/min

15

Coefficient of pressure in the earth

1.3～1.6

7

Back suction pressure

0～20MPa

16

Amount of cement blended

≥40％

8

Reverse flow

0～60L/min

17

Deviation of hole position

≤5cm

9

Pressure of water in hole

10～30MPa

18

28d compressive strength

1.0MPa

TABLE 2 Steel sleeve Rocker sinking construction parameters

After the construction method of the embodiment is adopted, the settlement amount of the pipeline close to 4m of the saddle well is 1.1cm (less than 2cm) and the horizontal displacement is 0.6mm during the whole construction period of the saddle well through measurement and calculation, and the construction requirements are met. The settlement of the pipeline within 2m close to the horsewell is 1.6cm (less than 2cm), and the construction requirement is met. After the pipe rocking machine is constructed, the vertical deviation of the first sleeve 3 is 51mm, and the construction requirement of 1/300 is met. Compared with the traditional construction method, the construction efficiency of a single horsewell is obviously improved.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A construction device for a horse-riding well, comprising:

a pipe shaking machine (1);

the first sleeve (3) is rocked to a preset construction position of the horsewell through the pipe rocking machine (1) and is connected with the top pipe (100);

the MJS construction method piles (2) are arranged at the preset construction position of the riding well in a surrounding manner along the circumferential direction;

excavating equipment for excavating the soil in the first casing (3);

the second sleeves (4) are coaxially arranged in the first sleeves (3) at intervals and connected with the top pipe (100), and concrete (200) is poured between the first sleeves (3) and the second sleeves (4) to form the horse riding well.

2. Construction equipment for horse-riding wells according to claim 1, wherein the first casing (3) is provided with a plurality of pointed structures at intervals in the circumferential direction on the edge of the opening at the end inserted into the ground.

3. Construction equipment for a horse-riding well according to claim 1, characterized in that said first casing (3) comprises a plurality of connected pipe sections, each two adjacent ones of which are welded connections.

4. Construction equipment for a horsewell according to claim 1, characterized in that said digging equipment comprises a sliding arm excavator and a telescopic arm excavator, said sliding arm excavator is used to dig the first stage soil material in said first casing (3), said telescopic arm excavator is used to dig the second stage soil material in said first casing (3), and the depth of said second stage soil material is larger than the depth of said first stage soil material.

5. Construction equipment for horse-riding wells according to claim 1, wherein a connecting plate (101) is annularly arranged on the outer wall of the top pipe (100), and the top pipe (100) is connected with the first casing (3) through the connecting plate (101).

6. Construction device for a horse-riding well according to claim 1, characterized in that a partition (5) is provided inside the first sleeve (3) at the top end opening, and the top end of the first sleeve (3) is covered with a cover plate (6).

7. Construction device for a horse-riding well according to claim 1, characterized in that the first casing (3) is made of a steel material and the second casing (4) is made of a polyethylene material.

8. Construction equipment for horse-riding wells according to claim 1, characterized in that a first pre-buried single-wall pipe (7) is provided on the first casing pipe (3) and a second pre-buried single-wall pipe (8) is provided in the second casing pipe (4).

9. Construction equipment for horse-riding wells according to claim 1, characterized in that the bottom of the top pipe (100) is provided with a plurality of grouting holes (103).

10. A construction method of a horse-riding well using the construction device of a horse-riding well according to any one of claims 1 to 9, comprising the steps of:

erecting the MJS construction method piles (2) by adopting a construction method of 180-degree swinging spraying in an MJS construction method to form a surrounding structure;

adopting the pipe shaking machine (1) to shake the first casing pipe (3) to a preset construction position of the horsehole, so that the first casing pipe (3) extends to be in contact with the underground top pipe (100);

digging out the soil in the first casing (3) by using the digging equipment;

after the excavation is finished, fixedly connecting the bottom end of the first casing pipe (3) with the outer wall of the top pipe (100), and forming a through hole (102) in the top pipe (100);

the second casing (4) is lowered in the first casing (3), and the bottom end of the second casing (4) is fixedly connected with the outer wall of the top pipe (100);

-casting concrete (200) between the first sleeve (3) and the second sleeve (4) to form the horse-riding well.