CN111827359A

CN111827359A - Valve well and construction method thereof

Info

Publication number: CN111827359A
Application number: CN202010729239.8A
Authority: CN
Inventors: 吴学向; 林叶青; 李晔; 蒋翀雄
Original assignee: Fujian Xinggang Construction Engineering Co ltd
Current assignee: Fujian Xinggang Construction Engineering Co ltd
Priority date: 2020-07-27
Filing date: 2020-07-27
Publication date: 2020-10-27

Abstract

The utility model relates to a valve well, be the well body that the opening set up including upper portion, install in the top of the well body and control the well lid that well body opening opened and close and install in the shock mount mechanism of well body lower extreme, first pipeline hole and second pipeline hole have been seted up respectively to the relative both sides wall of the well body, first pipeline hole and second pipeline hole all are equipped with the installation pipe, the installation pipe is including having elasticity and one end sealing connection in the flexible pipe in first pipeline hole or second pipeline hole and connecting in the connecting pipe of the other end of flexible pipe, two the one end that the well body was kept away from to flexible pipe is through flange fixed connection in pre-buried inlet channel and outlet conduit in the stratum respectively, places the well body in being connected with between two connecting pipes and has the control duct of valve. This application has the effect that improves the antidetonation waterproof performance of valve well.

Description

Valve well and construction method thereof

Technical Field

The application relates to the technical field of valve wells, in particular to a valve well and a construction method thereof.

Background

The valve well is a valve of an underground pipeline (such as tap water, oil, natural gas pipelines and the like), is convenient to open and close part of a pipe network or overhaul operation when needed, is provided with a pit (or a well) similar to a small room, and the valve and the like are arranged in the pit, so that the pipeline can be regularly checked, cleaned and dredged, a junction for preventing the pipeline from being blocked is formed, and the pit is called as the valve well.

The valve well brick valve well and the reinforced concrete valve well of prior art, the connected mode of buried pipeline and valve well usually is rigid seal connection, the shock resistance coefficient is lower, china's part area is in many earthquakes and takes place the area, the phenomenon of breaking takes place easily in the junction and the valve well lateral wall that often takes place the earthquake and lead to buried pipeline and valve well, lead to the water infiltration in the stratum to cause the valve well ponding in the valve well, the pipeline, the valve soaks in the aquatic for a long time, the corrosion phenomenon takes place easily, influence the pipeline, the life of valve.

Disclosure of Invention

In order to improve the antidetonation waterproof performance of valve well, one of the purpose of this application is to provide a valve well.

The application provides a valve well adopts following technical scheme:

the utility model provides a valve well, is the well body that the opening set up including upper portion, installs in the top of the well body and controls the well lid that well body opening opened and close and install in the shock mount mechanism of well body lower extreme, first pipeline hole and second pipeline hole have been seted up respectively to the relative both sides wall of well body, first pipeline hole and second pipeline hole all are equipped with the installation pipe, the installation pipe is including having elasticity and one end sealing connection in the flexible pipe in first pipeline hole or second pipeline hole and connecting in the connecting pipe of the other end of flexible pipe, two the one end that the well body was kept away from to flexible pipe is respectively through flange fixed connection in pre-buried inlet channel and outlet conduit in the stratum, places the well body in being connected with between two connecting pipes and has the control duct of valve.

Through adopting above-mentioned technical scheme, be provided with flexible pipe, the mounting tube is flexonics with the connected mode of pre-buried inlet channel and outlet conduit in the stratum, make well body and inlet channel, certain elastic deformation variable quantity has between the outlet conduit, reduce because the ground subsides the possibility that leads to the leakproofness decline of the junction of inlet channel and well body or the junction of outlet conduit and well body, the water in stratum permeates into the well body by first pipeline hole or second pipeline hole, the well body is provided with the shock mount mechanism, improve the shock resistance of the well body, effectively reduce because the earthquake leads to the well body lateral wall to take place cracked possibility, thereby further reduce the water in stratum and permeate into the well body possibility by first pipeline hole or second pipeline hole.

Preferably, the damping seat mechanism is including setting up in the first connecting plate of terminal surface under the well body, the second connecting plate that is located first connecting plate below, two and be intercrossing setting and both ends slide respectively and connect in the damping rod of first connecting plate and second connecting plate and the first damping spring of the contained angle between two damping rods of restriction, two damping rod middle part is articulated and is located between first connecting plate and the second connecting plate.

Through adopting above-mentioned technical scheme, two shock attenuation poles are with first connecting plate and second connecting plate fixed connection, the both ends of shock attenuation pole slide respectively connect in first connecting plate, the second connecting plate and two shock attenuation pole intercrossing hinge sets up, the corner of two shock attenuation poles changes and makes the upper and lower altitude distance of first connecting plate and second connecting plate have certain change space, be provided with first damping spring, when taking place the earthquake, the well body receives vertical effort, thereby extrude two shock attenuation poles, the tip production of two shock attenuation poles is respectively to first connecting plate, the open trend in second connecting plate both sides, force first damping spring and take place spring deformation, first damping spring produces the deformation power, be used for offsetting partial impact force, thereby reach the shock resistance who improves the well body.

Preferably, the lower terminal surface of first connecting plate be equipped with along the first spout that the horizontal direction extends and a pair of sliding connect in the first sliding block of first spout, two first sliding block articulates respectively in the upper end of two shock-absorbing rods, the up end of second connecting plate is equipped with along the second spout that the horizontal direction extends and a pair of sliding connect in the second sliding block of second spout, two the second sliding block articulates in the lower extreme of two shock-absorbing rods, and fixed connection is perhaps fixed connection between two second sliding blocks respectively in first damping spring's both ends.

Through adopting above-mentioned technical scheme, set up the first spout of first connecting plate and set up the second spout of second connecting plate up end and supply first sliding block and second sliding block to steadily slide respectively, thereby realize the turned angle regulation of two shock attenuation poles and realize first connecting plate, altitude variation between the second connecting plate is adjusted, receive vertical impact force when the well body, the contained angle increase of two shock attenuation poles, lead to two first sliding blocks, two second sliding blocks slide towards the direction of keeping away from each other respectively, thereby stretch first damping spring, thereby realize that first damping spring offsets partial impact force.

Preferably, a third sliding groove extending transversely is formed in the lower end face of the well body, a third sliding block connected with the third sliding groove in a sliding mode is arranged in the first connecting plate in a protruding mode, and a second damping spring is arranged between the third sliding block and the inner side wall of the third sliding groove.

Through adopting above-mentioned technical scheme, be provided with third spout and third sliding block for can follow transversely taking place relative sliding motion between the well body and the first connecting plate, set up the second damping spring between third sliding block and the third spout inside wall and can produce absorbing effect to horizontal ripples, after the earthquake, second damping spring provides the restoring force, makes the structure resume.

Preferably, the shock mount mechanism further comprises a base located below the second connecting plate and fixedly installed on the ground, a fourth sliding groove extending longitudinally is formed in the upper end face of the base, the second connecting plate is convexly provided with a fourth sliding block connected with the fourth sliding groove in a sliding mode, and a third shock absorption spring is arranged between the fourth sliding block and the inner side wall of the fourth sliding groove.

Through adopting above-mentioned technical scheme, be provided with fourth spout and fourth sliding block for can follow vertical relative sliding motion that takes place between base and the second connecting plate, set up the third damping spring between fourth sliding block and the fourth spout inside wall and can produce absorbing effect to vertical ripples, after the earthquake, third damping spring provides the restoring force, makes the structure resume.

Preferably, the base is provided with a concrete column in a penetrating manner, one end, far away from the base, of the concrete column extends into the stratum, a conical anti-falling block is integrally arranged at one end, located in the stratum, of the concrete column, and the diameter of the end face, close to the concrete column, of the anti-falling block is larger than that of the concrete column.

Through adopting above-mentioned technical scheme, through being provided with concrete column and anticreep piece, realize being fixed in the stratum with the base on, increase well body overall structure's stability and reliability.

Preferably, the flexible pipe is provided with the connecting end cover of seal installation in first pipeline hole or second pipeline hole, the fine sand concrete that mixes the expanding agent has all been pour in first pipeline hole, second pipeline hole, the periphery wall protrusion of connecting end cover is provided with the seal ring that improves connecting end cover and its peripheral fine sand concrete interlock intensity that mixes the expanding agent, the coaxial protrusion of seal ring is provided with the spacing ring of inlaying in the fine sand concrete, the connecting end cover passes through flange fixed connection with the connecting pipe.

Through adopting above-mentioned technical scheme, through between the inner wall with fine sand concrete pouring connection end cover outer wall and first pipeline hole, second pipeline hole, pour the fine sand concrete who mixes the expanding agent and ensure the impervious effect between installation pipe and the well body, be provided with the seal ring, further improve the impermeability between flexible pipe and the well body, be provided with the spacing ring, improve flexible pipe and its periphery and mix the fine sand concrete interlock intensity of expanding agent, the fastness in the pipeline hole of the well body is arranged in to the reinforcing installation pipe.

Preferably, the one end that the connecting pipe is close to the control duct has sliding sleeve along the axial sliding sealing connection, sliding sleeve is close to the tip periphery wall ring of connecting pipe and is equipped with the propelling movement ring, sliding sleeve passes through flange fixed connection with the control duct.

Through adopting above-mentioned technical scheme, be provided with sliding sleeve for certain compensation volume has between connecting pipe and the control duct, the installation of the control duct of being convenient for and connecting pipe improves the convenience of installation between the pipeline.

The second purpose of the invention is to provide a construction method of the valve well, which comprises the following steps:

s1, measuring and positioning, wherein the measuring and positioning are carried out according to a design drawing, and the axis position, the elevation of a base point and the plane size are marked obviously;

step S2, excavating a well chamber, wherein the well chamber is excavated by adopting mechanical excavation to artificially clean the bottom, the axis, the elevation and the geometric dimension of the well chamber are extended according to a design drawing, and the next procedure is carried out after the well chamber is qualified;

step S3, performing well chamber inner wall plastering treatment, namely plastering 1 on the inner side wall and the bottom wall of the well chamber: 2.5, if the cement mortar layer is below the underground water level, 1: 3, plastering cement mortar with the thickness of 20mm, and performing the next procedure after the strength is achieved;

step S4, hoisting the valve well, hoisting the prefabricated valve well to a well chamber through a crane, and reserving a gap between the well chamber and a well body;

step S5, installing and connecting pipelines;

and S6, installing a well ring and a well cover.

By adopting the technical scheme, the inner wall of the well chamber is subjected to surface finishing treatment, the anti-permeability capability of the peripheral wall and the bottom wall of the well chamber is improved, the possibility of water permeating into the well chamber is effectively reduced, the prefabricated valve well is hung in the well chamber, the construction period is effectively reduced, a gap is reserved between the well body of the valve well and the well chamber, a certain sliding movement space is provided for the well body, and the possibility of cracks of the well body due to earthquakes is reduced.

In summary, the present application includes at least one of the following beneficial technical effects:

the installation pipe is flexibly connected with the water inlet pipeline and the water outlet pipeline which are embedded in the stratum, so that a certain elastic deformation variable quantity exists between the well body and the water inlet pipeline and between the well body and the water outlet pipeline, the possibility that the sealing performance of the joint of the water inlet pipeline and the well body or the joint of the water outlet pipeline and the well body is reduced due to foundation settlement is reduced, and water in the stratum permeates into the well body from the first pipeline hole or the second pipeline hole;

the well body is provided with the shock absorption seat mechanism, so that the shock resistance of the well body is improved, the possibility of fracture of the side wall of the well body caused by an earthquake is effectively reduced, and the possibility of the water of the stratum penetrating into the well body from the first pipeline hole or the second pipeline hole is further reduced;

through between the inner wall with fine sand concrete pouring connection end cover outer wall and first pipeline hole, second pipeline hole, pour the fine sand concrete who mixes the inflation agent and ensure the impervious effect between installation pipe and the well body, be provided with the seal ring, further improve the impermeability between flexible pipe and the well body, be provided with the spacing ring, improve flexible pipe and its peripheral fine sand concrete interlock intensity of mixing the inflation agent, the fastness in the pipeline hole of well body is arranged in to the reinforcing installation pipe.

Drawings

FIG. 1 is a schematic view of the overall structure of a valve well;

FIG. 2 is a schematic view of the internal structure of the well;

FIG. 3 is a schematic view of the construction of the installation tube;

FIG. 4 is a schematic illustration of a connection of the connection end fitting to the first and second conduit bores;

FIG. 5 is a schematic structural view of a damper mount mechanism;

FIG. 6 is a schematic view of the connection structure of the first and second sliding blocks and the first damping spring;

fig. 7 is a process flow diagram of a method of constructing a valve well.

Description of reference numerals: 1. a well body; 11. an opening; 12. a first conduit aperture; 13. a second conduit aperture; 14. fine sand concrete; 15. a supporting seat; 16. an operating bar; 17. climbing a ladder; 2. a well cover; 3. a damper base mechanism; 31. a first connecting plate; 311. a third slider; 312. a second damping spring; 313. a first chute; 314. a first slider; 32. a second connecting plate; 321. a second chute; 322. a second slider; 323. a fourth slider; 324. a third damping spring; 33. a shock-absorbing lever; 34. a first damping spring; 35. a base; 351. a fourth chute; 352. a concrete column; 353. an anti-drop block; 4. a water inlet pipe; 5. a water outlet pipeline; 6. a control conduit; 7. installing a pipe; 71. a telescopic pipe; 711. connecting the end sleeves; 712. a water stop ring; 713. a limiting ring; 72. a connecting pipe; 721. a sliding sleeve; 722. the ring is pushed.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses valve well, refers to fig. 1, including upper portion be opening 11 setting and transversal personally submit square well body 1, install in the top of well body 1 and control well lid 2 that well body 1 opening 11 opened and close and install in the shock attenuation seat mechanism 3 of well body 1 lower extreme. The well body 1, well lid 2 are formed by impervious concrete pouring, and shock attenuation seat mechanism 3 is provided with four groups and distributes in four summits of well body 1.

Referring to fig. 2 and 3, a first pipeline hole 12 and a second pipeline hole 13 are respectively formed in two opposite side walls of the well body 1, the axes of the first pipeline hole 12 and the second pipeline hole 13 are transversely arranged, and the first pipeline hole 12 and the second pipeline hole 13 are both provided with installation pipes 7. The installation pipe 7 comprises an extension pipe 71 which has elasticity and one end of which is connected with the first pipeline hole 12 or the second pipeline hole 13 in a sealing manner and a connecting pipe 72 connected with the other end of the extension pipe 71, one ends of the two extension pipes 71, which are far away from the well body 1, are respectively and fixedly connected with an inlet pipe 4 and an outlet pipe 5 which are pre-embedded in the ground layer through flanges, and the other end of the extension pipe 71 is provided with a connecting end sleeve 711 which is mounted in the first pipeline hole 12 or the second pipeline hole 13 in a sealing manner.

Referring to fig. 3 and 4, fine sand concrete 14 doped with a calcium sulphoaluminate type concrete expanding agent is poured in each of the first pipeline hole 12 and the second pipeline hole 13, a water stop ring 712 for improving the engagement strength of the connecting end sleeve 711 and the fine sand concrete 14 doped with the expanding agent on the periphery of the connecting end sleeve 711 is arranged on the outer peripheral wall of the connecting end sleeve 711 in a protruding mode, the diameter of the water stop ring 712 is smaller than that of the first pipeline hole 12 and the second pipeline hole 13, a limit ring 713 embedded in the fine sand concrete 14 is coaxially arranged on the water stop ring 712 in a protruding mode, and the connecting end sleeve 711 is fixedly connected with the connecting pipe 72 through a flange. A control pipeline 6 which is arranged in the well body 1 and is provided with a valve is connected between the two connecting pipes 72, one end of the connecting pipe 72 close to the control pipeline 6 is connected with a sliding sleeve 721 in a sliding and sealing mode along the axial direction, the peripheral wall of the end part of the sliding sleeve 721 close to the connecting pipe 72 is provided with a pushing ring 722 in a surrounding mode, and the sliding sleeve 721 is fixedly connected with the control pipeline 6 through a flange. Referring to fig. 2, a climbing ladder 17 is arranged on the inner wall of the well body 1, an operating platform and a supporting seat 15 are convexly arranged on the inner wall of the bottom of the well body 1, and the top of the supporting seat 15 is used for supporting the control pipeline 6.

Referring to fig. 5 and 6, each damping mount mechanism 3 includes a first connecting plate 31 disposed on the lower end surface of the well body 1, a second connecting plate 32 located below the first connecting plate 31, two damping rods 33 disposed in an intersecting manner and having two ends slidably connected to the first connecting plate 31 and the second connecting plate 32, a first damping spring 34 for limiting an included angle between the two damping rods 33, and a base 35 located below the second connecting plate 32. Each base 35 is provided with a concrete column 352 in a penetrating manner, one end of the concrete column 352, which is far away from the base 35, extends into the ground, a conical anti-falling block 353 is integrally arranged at one end of the concrete column 352, which is located in the ground, and the diameter of the end face, close to the concrete column 352, of the anti-falling block 353 is larger than that of the concrete column 352.

The lower end surface of the first connecting plate 31 is provided with a first sliding slot 313 extending along the transverse direction and a pair of first sliding blocks 314 connected to the first sliding slot 313 in a sliding manner, and the two first sliding blocks 314 are respectively hinged to the upper ends of the two shock-absorbing rods 33. The upper end face of the second connecting plate 32 is provided with a second sliding slot 321 extending along the transverse direction and a pair of second sliding blocks 322 connected to the second sliding slot 321 in a sliding manner, and the two second sliding blocks 322 are hinged to the lower ends of the two shock-absorbing rods 33. The two ends of the first damping spring 34 are fixedly connected between the two first sliding blocks 314 or between the two second sliding blocks 322, respectively.

The lower terminal surface of the well body 1 is provided with a transversely extending third sliding groove, the first connecting plate 31 is convexly provided with a third sliding block 311 connected to the third sliding groove in a sliding manner, a second damping spring 312 is arranged between the third sliding block 311 and the inner side wall of the third sliding groove, and one end of the second damping spring 312 is fixedly connected to the inner side wall of the third sliding groove and the other end of the second damping spring 312 is fixedly connected to the third sliding block 311. The upper end surface of the base 35 is provided with a fourth sliding groove 351 extending along the longitudinal direction, the second connecting plate 32 is convexly provided with a fourth sliding block 323 connected to the fourth sliding groove 351 in a sliding manner, a third damping spring 324 is arranged between the fourth sliding block 323 and the inner side wall of the fourth sliding groove 351, and one end of the third damping spring 324 is fixedly connected to the inner side wall of the fourth sliding groove 351 and the other end of the third damping spring is fixedly connected to the fourth sliding block 323.

The implementation principle of this application embodiment valve well does: the installation pipe 7 is flexibly connected with the water inlet pipeline 4 and the water outlet pipeline 5 which are pre-buried in the stratum, so that a certain elastic deformation variable quantity exists between the well body 1 and the water inlet pipeline 4 and between the well body 5, the possibility that the sealing performance of the connection part of the water inlet pipeline 4 and the well body 1 or the connection part of the water outlet pipeline 5 and the well body 1 is reduced due to foundation settlement, and the water in the stratum permeates into the well body 1 through the first pipeline hole 12 or the second pipeline hole 13;

when an earthquake occurs, the well body 1 is subjected to a vertical acting force so as to extrude the two shock absorption rods 33, the end parts of the two shock absorption rods 33 generate a tendency of respectively opening towards the two sides of the first connecting plate 31 and the second connecting plate 32, so that the first shock absorption spring 34 is forced to generate spring deformation, and the first shock absorption spring 34 generates deformation force for offsetting partial vertical impact force; a third sliding chute and a third sliding block 311 are arranged, so that the well body 1 and the first connecting plate 31 can perform relative sliding movement along the transverse direction, and a second damping spring 312 arranged between the third sliding block 311 and the inner side wall of the third sliding chute can perform a damping effect on transverse waves; be provided with fourth spout 351 and fourth sliding block 323 for can take place relative sliding motion along vertically between base 35 and the second connecting plate 32, set up third damping spring 324 between fourth sliding block 323 and the fourth spout 351 inside wall and can produce the absorbing effect to longitudinal wave, after the earthquake, first damping spring 34, second damping spring 312 and third damping spring 324 provide the restoring force, make the structure reset.

The embodiment of the application also discloses a construction method of the valve well, which comprises the following steps with reference to fig. 7:

step S4, hoisting the valve well, hoisting the prefabricated valve well to a well chamber through a crane, and pouring a concrete column 352 and an anti-falling block 353 on the base 35, so that the base 35 is fixed at the bottom of the well chamber, and a gap is reserved between the well chamber and the well body 1;

step S5, installing and connecting each pipeline, namely, firstly, fixedly installing the extension pipe 71, the water inlet pipeline 4 and the water outlet pipeline 5 through flanges, then fixedly installing the connecting pipe 72 and the other end of the extension pipe 71 through the flanges, then fixedly installing the sliding sleeve 721 and the control pipeline 6 through the flanges, after the installation of each pipeline is finished, carrying out waterproof sealing detection on each pipeline, after the detection is passed, plugging and pouring the first pipeline hole 12 and the second pipeline hole 13, and pouring fine sand concrete 14 doped with a calcium sulphoaluminate type concrete expanding agent into the first pipeline hole 12 and the second pipeline hole 13;

and step S6, installing a well ring and a well cover, and hermetically installing the well cover 2 and the well body 1, so that the possibility that water enters the well body 1 from the opening 11 of the well body 1 is reduced.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A valve well, comprising: the device comprises a well body (1) with an opening (11) at the upper part, a well cover (2) which is arranged above the well body (1) and controls the opening (11) of the well body (1) to open and close, and a shock absorption seat mechanism (3) which is arranged at the lower end of the well body (1), wherein a first pipeline hole (12) and a second pipeline hole (13) are respectively arranged on two opposite side walls of the well body (1), the first pipeline hole (12) and the second pipeline hole (13) are respectively provided with a mounting pipe (7), the mounting pipe (7) comprises a telescopic pipe (71) which has elasticity and one end of which is hermetically connected with the first pipeline hole (12) or the second pipeline hole (13), and a connecting pipe (72) which is connected with the other end of the telescopic pipe (71), one ends of the two telescopic pipes (71) far away from the well body (1) are respectively and fixedly connected with a water inlet pipeline (4) and a water outlet pipeline (5, a control pipeline (6) which is arranged in the well body (1) and is provided with a valve is connected between the two connecting pipes (72).

2. A valve well according to claim 1, wherein: shock mount mechanism (3) are including setting up in well body (1) first connecting plate (31) of terminal surface down, second connecting plate (32) that are located first connecting plate (31) below, two and are intercrossing setting and both ends and slide respectively and connect in shock attenuation pole (33) of first connecting plate (31) and second connecting plate (32) and two damping spring (34) of contained angle between the shock attenuation pole (33) of restriction, two shock attenuation pole (33) middle part is articulated and is located between first connecting plate (31) and second connecting plate (32).

3. A valve well according to claim 2, wherein: the lower terminal surface of first connecting plate (31) is equipped with along the first spout (313) of horizontal direction extension and a pair of sliding connection in first sliding block (314) of first spout (313), two first sliding block (314) articulate respectively in the upper end of two shock attenuation poles (33), the up end of second connecting plate (32) is equipped with along the second spout (321) of horizontal direction extension and a pair of second sliding block (322) of sliding connection in second spout (321), two second sliding block (322) articulate in the lower extreme of two shock attenuation poles (33), and the both ends of first damping spring (34) are fixed connection respectively between two first sliding block (314) or fixed connection between two second sliding block (322).

4. A valve well according to claim 2, wherein: the lower terminal surface of well body (1) is seted up the third spout of horizontal extension, first connecting plate (31) protrusion be provided with slide connect in third sliding block (311) of third spout, be provided with second damping spring (312) between third sliding block (311) and the third spout inside wall.

5. A valve well according to claim 2, wherein: shock attenuation seat mechanism (3) are still including being located second connecting plate (32) below and fixed mounting in base (35) of stratum, fourth spout (351) along longitudinal extension are seted up to the up end of base (35), second connecting plate (32) protrusion be provided with slide connect in fourth sliding block (323) of fourth spout (351), be provided with third damping spring (324) between fourth sliding block (323) and fourth spout (351) inside wall.

6. A valve well according to claim 5, wherein: the anti-dropping device is characterized in that a concrete column (352) penetrates through the base (35), one end, far away from the base (35), of the concrete column (352) penetrates into a stratum, a conical anti-dropping block (353) is integrally arranged at one end, located in the stratum, of the concrete column (352), and the diameter of the end face, close to the concrete column (352), of the anti-dropping block (353) is larger than that of the concrete column (352).

7. A valve well according to claim 1, wherein: the telescopic pipe (71) is provided with a connecting end sleeve (711) which is hermetically installed in a first pipeline hole (12) or a second pipeline hole (13), fine sand concrete (14) doped with an expanding agent is poured in the first pipeline hole (12) and the second pipeline hole (13), a water stop ring (712) for improving the engaging strength of the connecting end sleeve (711) and the fine sand concrete (14) doped with the expanding agent on the periphery of the connecting end sleeve (711) is arranged on the outer peripheral wall of the connecting end sleeve (711) in a protruding mode, a limiting ring (713) embedded in the fine sand concrete (14) is coaxially arranged on the water stop ring (712) in a protruding mode, and the connecting end sleeve (711) is fixedly connected with the connecting pipe (72) through flanges.

8. A valve well according to claim 7, wherein: the connecting pipe (72) are close to the one end of control duct (6) and slide sealing connection along the axial has sliding sleeve (721), sliding sleeve (721) are close to the tip periphery wall ring of connecting pipe (72) and are equipped with propelling ring (722), sliding sleeve (721) pass through flange fixed connection with control duct (6).

9. A construction method of a valve well is characterized by comprising the following steps: the method comprises the following steps:

step S4, hoisting the valve well, namely hoisting the valve well according to any one of the prefabricated claims 1-8 to a well chamber by a crane, and leaving a gap between the well chamber and the well body (1);

step S5, installing and connecting pipelines;

and S6, installing a well ring and a well cover.