CN115217137A - Anti-radiation raft foundation dewatering well sealing structure and construction method - Google Patents
Anti-radiation raft foundation dewatering well sealing structure and construction method Download PDFInfo
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- CN115217137A CN115217137A CN202210868902.1A CN202210868902A CN115217137A CN 115217137 A CN115217137 A CN 115217137A CN 202210868902 A CN202210868902 A CN 202210868902A CN 115217137 A CN115217137 A CN 115217137A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention discloses a well sealing structure of a dewatering well of a radiation-proof raft foundation and a construction method, and relates to the technical field of well sealing of dewatering wells. The invention has the beneficial effects that: inside there is the through joint during traditional shut-in well device later stage shutoff, and the anti-radiation raft foundation precipitation well shut-in well structure of this scheme design is through setting up middle part cavity and top cavity as the isolation layer, and during impervious concrete was pour in later stage, all formed the concrete structure of unsmooth type at middle part cavity and top cavity, and optimized the shape that has become unsmooth type with the inside vertical through connection seam of traditional shut-in well device, realized effectively blockking the radiation ray.
Description
Technical Field
The invention relates to the technical field of dewatering well sealing, in particular to a dewatering well sealing structure of a radiation-proof raft foundation and a construction method.
Background
Proton and heavy ion therapy technology is one of radiotherapy, is internationally recognized advanced technology of radiotherapy, and represents the highest technology and future trend of radiotherapy compared with the development of traditional radiotherapy for hundreds of years, and the number of domestic proton and heavy ion hospitals is gradually increased.
Because proton heavy ion therapy relates to radiation operation, the therapy room usually adopts structures such as walls and floor slabs with larger thickness, most of the structural forms are large-volume concrete construction, for example, in a certain proton heavy ion hospital project in Xuzhou, the thickness of a raft plate in a proton heavy ion area reaches 3m, the local thickness reaches 6m, and the concrete pouring amount of the raft plate exceeds 1 ten thousand cubes. When the raft foundation is located below the ground water level, a precipitation well needs to be constructed in the earth excavation and underground structure construction stages, the foundation pit is subjected to continuous precipitation, and the precipitation is stopped generally only by main body capping, so that steel pipes (penetrating through the raft and penetrating into the precipitation well) need to be installed on the precipitation well during raft construction, and the precipitation construction after the raft construction is completed is met;
but traditional shut-in well device is straight section of thick bamboo structure, can form the through joint in the section of thick bamboo during later stage shutoff, the condition that the radiation leaked can appear in radiation protection structure, produces the radiation influence to soil, simultaneously to super thick raft board, how to carry out interim fixed also the difficult problem that urgently needs to solve with super high shut-in well steel pipe, consequently need improve traditional shut-in well device in the heavy ion structure construction of proton.
Disclosure of Invention
In order to achieve the purpose, the invention provides a well sealing structure of a dewatering well of a radiation-proof raft foundation and a construction method.
The technical scheme includes that the well sealing steel cylinder comprises a temporary fixing ring unit, a lower clamping ring, a well sealing pipe barrel, a middle cavity and a top cavity, wherein the temporary fixing ring unit, the lower clamping ring, the well sealing pipe barrel, the middle cavity and the top cavity are arranged along a sand-free pipe well from bottom to top;
the bottom of the well sealing pipe barrel is provided with a bottom downward extending barrel, and the diameter of the barrel body of the bottom downward extending barrel is smaller than the inner diameter of the sand-free pipe well.
The temporary fixing ring unit comprises a fixing ring, a base plate, a fixing bolt, a fixing nut and a fixing upright rod.
The middle cavity and the top cavity are both annular cavities, the top of the top cavity is provided with an opening, and the diameters of the middle cavity and the top cavity are both larger than the diameter of the well sealing pipe barrel.
The lower clamping ring is annular and is fixedly arranged on the outer wall of the well sealing pipe barrel.
The retainer plate is provided with two, every the retainer plate all sets up to the semi-annular, through backing plate, fixing bolt, fixation nut fixed connection between two retainer plates.
Two the retainer plate cup joints the outside of no sand pipe well, the internal diameter of retainer plate equals with the external diameter of no sand pipe well, the both ends of retainer plate all are provided with the screw hole, the backing plate both ends are provided with the screw hole, pass through between backing plate and the retainer plate fixing bolt with fixation nut fixed connection.
Fixed pole setting sets up the upper surface of retainer plate, the retainer plate with through fixed pole setting welded fastening between the snap ring of lower part.
A construction method based on a radiation-proof raft foundation dewatering well shut-in structure comprises the following steps:
s1, when earth is excavated to a cushion layer position, the bottom of a well sealing steel cylinder is placed in a sand-free pipe well, and a bottom downward extending cylinder is enabled to completely enter the sand-free pipe well, and at the moment, a lower clamping ring is just positioned at the top of the sand-free pipe well;
the inner diameter of the fixed ring is equal to the outer diameter of the sand-free pipe well, so that the well body of the sand-free pipe well can be just clamped when the two fixed rings are combined;
s2, meanwhile, the fixing ring is connected with the lower clamping ring in a welding mode through the fixing vertical rod;
s3, when the well sealing steel cylinder is placed on the sand-free pipe well, installing a base plate, and fixing the two semi-annular fixing rings into a whole through a fixing bolt and a fixing nut, so that the whole well sealing steel cylinder can be stably fixed on the sand-free pipe well;
s4, during the later-stage raft casting process, the lower clamping ring and the middle cavity directly enter the concrete structure to be cast, the whole well sealing steel cylinder is completely wrapped by concrete, and a channel for upward drainage of the pipe well can be formed inside the well sealing steel cylinder.
When the field construction does not need to be carried out to precipitation, the final plugging of the well sealing steel cylinder is needed, and the method comprises the following steps:
s1, lifting devices such as a water pump and a water pipe in a sand-free pipe well when the structure is constructed to the extent that underground water does not need to be drained any more;
s2, filling graded broken stones into the sand-free pipe well until the lower area of the middle cavity;
s3, pouring impervious concrete in the upper area of the graded broken stones to fill the whole well sealing steel cylinder until the height of the well sealing steel cylinder is higher than that of the top mark of the raft plate;
s4, in order to guarantee the water-resisting effect, water-stopping expansion rubber strips are symmetrically installed on the side wall of the middle cavity, and the water-resisting function of the well sealing device is improved.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: the invention provides a well sealing structure of a dewatering well of a radiation-proof raft foundation and a construction method, which can solve the following construction problems:
(1) According to the scheme, the middle cavity and the top cavity are used as isolation layers, when impervious concrete is poured in the later period, concave-convex concrete structures are formed in the middle cavity and the top cavity, vertical through connecting joints in the traditional well sealing device are optimized into concave-convex shapes, and effective blocking of radiation rays is achieved;
(2) The raft that the heavy ion of proton building adopted is super thick raft, and consequently the shut-in well device is all great, appears rocking easily in concrete work progress, leads to appearing the potential safety hazard of empting, and this scheme is when the shut-in well steel cylinder is placed on no sand pipe tube well, the installation backing plate, through fixing bolt with fixation nut fixes two semi-annular retainer plates for a whole, has realized that whole shut-in well steel cylinder can be firm fix on no sand pipe tube well, has effectively reduced the hidden danger that the shut-in well device is too high to appear empting in the super thick raft, has effectively guaranteed site operation safety.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.
Fig. 2 is a partially enlarged view a of fig. 1.
FIG. 3 is a cross-sectional view of an embodiment of the present invention.
FIG. 4 is a schematic diagram of a later plugging mode of the well plugging steel cylinder in the embodiment of the invention.
Wherein the reference numbers are: 1. a sand-free pipe well; 2. a temporary retainer ring unit; 3. a lower snap ring; 4. sealing a well pipe barrel; 5. a middle cavity; 6. a top cavity; 7. a bottom down-extending cylinder; 201. a stationary ring; 202. a base plate; 203. fixing the bolt; 204. fixing a nut; 205. fixing the vertical rod; 8. grading broken stone; 9. impervious concrete; 10. and (4) stopping the water and expanding the rubber strip.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. Of course, the specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting.
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings, which are merely for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; 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 meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
Example 1
Referring to fig. 1 to 4, the invention provides a well sealing structure of a radiation-proof raft foundation dewatering well and a construction method, comprising a well sealing steel cylinder, wherein the well sealing steel cylinder comprises a temporary fixing ring unit 2, a lower clamping ring 3, a well sealing pipe barrel 4, a middle cavity 5 and a top cavity 6 which are arranged from bottom to top along a sand-free pipe well 1;
the bottom of the well-sealing pipe barrel 4 is provided with a bottom downward extending barrel 7, and the diameter of the barrel body of the bottom downward extending barrel 7 is smaller than the inner diameter of the sand-free pipe well 1.
The temporary fixing ring unit 2 comprises a fixing ring 201, a backing plate 202, a fixing bolt 203, a fixing nut 204 and a fixing upright 205.
The middle cavity 5 and the top cavity 6 are both provided with annular cavities, the top of the top cavity 6 is provided with an opening, and the diameters of the cylinder bodies of the middle cavity 5 and the top cavity 6 are both larger than that of the well sealing cylinder 4.
The lower clamping ring 3 is annular, and the lower clamping ring 3 is fixedly arranged on the outer wall of the well sealing pipe barrel 4.
The retainer plate 201 is provided with two, and every retainer plate 201 all sets up to the hemicycle, through backing plate 202, fixing bolt 203, fixation nut 204 fixed connection between two retainer plates 201.
Two retainer plates 201 cup joint in the outside of no sand pipe shaft 1, and the internal diameter of retainer plate 201 equals with no sand pipe shaft 1's external diameter, and the both ends of retainer plate 201 all are provided with the screw hole, and backing plate 202 both ends are provided with the screw hole, through fixing bolt 203 and fixation nut 204 fixed connection between backing plate 202 and the retainer plate 201.
Fixed pole setting 205 sets up the upper surface at retainer plate 201, and through fixed pole 205 welded fastening between retainer plate 201 and the lower part snap ring 3.
A construction method based on a radiation-proof raft foundation dewatering well shut-in structure comprises the following steps:
s1, when earth is excavated to a cushion layer position, the bottom of a well sealing steel cylinder is placed in a sand-free pipe well 1, a bottom downward extending cylinder 7 is enabled to completely enter the sand-free pipe well 1, and at the moment, a lower clamping ring 3 is just positioned at the top of the sand-free pipe well 1;
the inner diameter of the fixing ring 201 is equal to the outer diameter of the sand-free pipe well 1, so that the well body of the sand-free pipe well 1 can be just clamped when the two fixing rings 201 are combined;
s2, meanwhile, the fixing ring 201 and the lower clamping ring 3 are connected through a fixing upright rod 205 in a welding mode;
s3, when the well sealing steel cylinder is placed on the sand-free pipe well 1, installing a base plate 202, and fixing the two semi-annular fixing rings 201 into a whole through a fixing bolt 203 and a fixing nut 204, so that the whole well sealing steel cylinder can be stably fixed on the sand-free pipe well 1;
s4, in the later-stage raft plate pouring process, the lower portion clamping ring 3 and the middle portion cavity 5 directly enter into and are poured into the concrete structure, the whole well sealing steel cylinder is completely wrapped by concrete, and a passage for upward drainage of the tube well can be formed inside the well sealing steel cylinder.
When the field construction does not need to be carried out to precipitation, the final plugging of the well sealing steel cylinder is needed, and the method comprises the following steps:
s1, lifting devices such as a water pump, a water pipe and the like in a sand-free pipe well 1 when the structure is constructed to the state that underground water does not need to be drained;
s2, filling graded broken stones 8 into the sand-free pipe well 1 to the lower area of the middle cavity 5;
s3, pouring impervious concrete 9 into the upper area of the graded broken stones 8 to fill the whole well sealing steel cylinder until the height of the well sealing steel cylinder is higher than the top mark of the raft;
s4, in order to guarantee the water-resisting effect, water-resisting expansion rubber strips 10 are symmetrically arranged on the side wall of the middle cavity 5, and the water-resisting function of the well sealing device is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (9)
1. A well sealing structure of a dewatering well of a radiation-proof raft foundation is characterized by comprising a well sealing steel cylinder, wherein the well sealing steel cylinder comprises a temporary fixing ring unit (2), a lower clamping ring (3), a well sealing pipe barrel (4), a middle cavity (5) and a top cavity (6) which are arranged from bottom to top along a sand-free pipe well (1);
the bottom of the well shut-in pipe barrel (4) is provided with a bottom downward extending barrel (7), and the diameter of the barrel body of the bottom downward extending barrel (7) is smaller than the inner diameter of the sand-free pipe well (1).
2. The anti-radiation raft foundation dewatering well sealing structure according to claim 1, wherein the temporary fixing ring unit (2) comprises a fixing ring (201), a base plate (202), a fixing bolt (203), a fixing nut (204) and a fixing upright rod (205).
3. The well sealing structure of the radiation protection raft foundation dewatering well according to claim 1, wherein the middle cavity (5) and the top cavity (6) are both provided as annular cavities, the top of the top cavity (6) is provided with an opening, and the diameters of the barrel bodies of the middle cavity (5) and the top cavity (6) are both larger than the diameter of the well sealing barrel (4).
4. The anti-radiation raft foundation dewatering well shut-in structure of claim 1, wherein the lower snap ring (3) is arranged in a ring shape, and the lower snap ring (3) is fixedly arranged on the outer wall of the well shut-in pipe barrel (4).
5. The anti-radiation raft foundation dewatering well sealing structure according to claim 2, wherein two fixing rings (201) are arranged, each fixing ring (201) is semi-annular, and the two fixing rings (201) are fixedly connected through a base plate (202), a fixing bolt (203) and a fixing nut (204).
6. The anti-radiation raft foundation dewatering well sealing structure according to claim 4, wherein the two fixing rings (201) are sleeved outside the sand-free pipe well (1), the inner diameter of each fixing ring (201) is equal to the outer diameter of the sand-free pipe well (1), threaded holes are formed in two ends of each fixing ring (201), threaded holes are formed in two ends of the backing plate (202), and the backing plate (202) and the fixing rings (201) are fixedly connected through the fixing bolts (203) and the fixing nuts (204).
7. The well sealing structure of the radiation-proof raft foundation dewatering well according to claim 2, wherein the fixing vertical rods (205) are arranged on the upper surface of the fixing ring (201), and the fixing ring (201) and the lower snap ring (3) are welded and fixed through the fixing vertical rods (205).
8. The construction method of the anti-radiation raft foundation dewatering well sealing structure based on the claim 1 is characterized by comprising the following steps:
s1, when earth is excavated to a cushion layer position, the bottom of a well sealing steel cylinder is placed in a sand-free pipe well (1), a bottom downward extending cylinder (7) is enabled to completely enter the sand-free pipe well (1), and at the moment, a lower clamping ring (3) is just positioned at the top of the sand-free pipe well (1);
the inner diameter of the fixing ring (201) is equal to the outer diameter of the sand-free pipe well (1), so that the well body of the sand-free pipe well (1) can be just clamped when the two fixing rings (201) are combined;
s2, the fixing ring (201) and the lower clamping ring (3) are connected through a fixing vertical rod (205) in a welding mode;
s3, when the well sealing steel cylinder is placed on the sand-free pipe well (1), installing a base plate (202), and fixing two semi-annular fixing rings (201) into a whole through a fixing bolt (203) and a fixing nut (204), so that the whole well sealing steel cylinder can be stably fixed on the sand-free pipe well (1);
s4, during the later-stage raft casting process, the lower clamping ring (3) and the middle cavity (5) directly enter into the concrete structure to be cast, the whole well sealing steel cylinder is completely wrapped by concrete, and a passage for upward drainage of the pipe well can be formed inside the well sealing steel cylinder.
9. The construction method of the well sealing structure of the radiation-proof raft foundation dewatering well based on claim 1, wherein when the field construction is completed and no dewatering is needed, the final plugging of the well sealing steel cylinder is needed, and the method comprises the following steps:
s1, lifting devices such as a water pump and a water pipe in a sand-free pipe well (1) when the structure is constructed to the state that underground water does not need to be drained;
s2, filling graded broken stones (8) into the sand-free pipe well (1) to the lower area of the middle cavity (5);
s3, pouring impervious concrete (9) into the upper area of the graded broken stones (8) to fill the whole well sealing steel cylinder until the height of the well sealing steel cylinder is higher than the top mark of the raft;
s4, in order to guarantee the water-resisting effect, water-stopping expansion rubber strips (10) are symmetrically arranged on the side wall of the middle cavity (5), and the water-resisting function of the well sealing device is improved.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210868902.1A CN115217137B (en) | 2022-07-22 | 2022-07-22 | Anti-radiation raft foundation dewatering well sealing structure and construction method |
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| CN202210868902.1A CN115217137B (en) | 2022-07-22 | 2022-07-22 | Anti-radiation raft foundation dewatering well sealing structure and construction method |
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