A construction method of a medical linear accelerator connected to the main body of a basement

Abstract

The present invention belongs to the technical field of underground structures. The present invention discloses a construction method of a medical linear accelerator connected to the main body of a basement. The vertical construction sequence is as follows: Excavate the soil in the linear accelerator area to the elevation of the bottom of the fourth support beam; Construct the basement floor slab; Remove the internal support beams from bottom to top and construct the main structure at the corresponding height, and at the same time construct the lower structure of the linear accelerator floor slab or the linear accelerator structure; Construct the remaining basement roof slab of the linear accelerator; The horizontal construction sequence of the basement main structure and the linear accelerator is as follows: Construct the main structure of the three sections at the -2F level underground, and the third section is constructed simultaneously with the linear accelerator floor slab; Construct the main structure of the three sections at the -1F level underground, and the third section is constructed simultaneously with the outer wall of the linear accelerator. The method of the present invention can prevent ray leakage at low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of underground structures, and particularly relates to a construction method for a medical linear accelerator connected to the main body of a basement. Background Art

[0002] The description of the background art in the present invention belongs to the related art related to the present invention, and is only used to illustrate and facilitate the understanding of the content of the present invention, and should not be construed as the applicant clearly believing or presuming that the applicant believes it is the prior art on the filing date of the first application of the present invention.

[0003] At present, medical linear accelerators are all separate buildings and are not connected to the main body of the hospital basement. And due to the reason of preventing ray leakage of the linear accelerator, it is generally required that the main structure of the linear accelerator be poured in one go. Since the prior art cannot achieve the all-at-once pouring of the main structure of the linear accelerator, at the present stage, the method of leaving a rabbet construction joint and strengthening with local lead plates is usually adopted for construction. On the other hand, at the present stage, all linear accelerators are independent buildings, separately designed and constructed from the main structure of the hospital. However, since most hospitals are located in the city center, especially in big cities, in order to alleviate the tense land use situation, the main structure of the basement and the linear accelerator are gradually designed as a whole. Due to the special requirements of the linear accelerator, there are great differences in the construction sequence between the construction of the main body of the basement and the construction of the linear accelerator, further increasing the construction difficulty of the linear accelerator. Summary of the Invention

[0004] The purpose of the embodiment of the present invention is to provide a construction method for a medical linear accelerator connected to the main body of a basement. The method of the present invention solves the new shape and position of the construction joint of the linear accelerator, and solves the technical problems such as the earth excavation sequence and method during the construction of the linear accelerator and the main structure (sharing piles, columns, and walls with the main structure), the demolition sequence of the concrete internal support of the foundation pit support, the conflict between the linear accelerator and the lattice column of the internal support, and the concrete pouring sequence during the construction of the linear accelerator and the main structure.

[0005] The purpose of the embodiment of the present invention is achieved through the following technical solutions:

[0006] A construction method for a medical linear accelerator connected to the main body of a basement includes the following steps:

[0007] Vertical construction sequence of the main body of the basement and the linear accelerator:

[0008] Excavate the soil in the linear accelerator area to the elevation of the bottom of the fourth support beam, and then retain a reserved soil platform at the outer edge of the basement floor slab; construct the basement floor slab;

[0009] Demolish the internal support beams from bottom to top and construct the main structure at the corresponding height. Meanwhile, construct the substructure under the linear accelerator floor slab or the linear accelerator structure.

[0010] Construct the remaining basement roof slab of the linear accelerator.

[0011] Horizontal construction sequence of the basement main structure and the linear accelerator:

[0012] Construct the main structure of the first construction section at the -2F level of the basement, then construct the main structure of the second construction section at the -2F level of the basement, and finally construct the main structure of the third construction section at the -2F level of the basement and the linear accelerator floor slab simultaneously.

[0013] Construct the main structure of the first construction section at the -1F level of the basement, then construct the main structure of the second construction section at the -1F level of the basement, and finally construct the main structure of the third construction section at the -1F level of the basement and the outer wall of the linear accelerator simultaneously.

[0014] Furthermore, a reserved soil platform is retained at the outer edge of the basement floor slab. Specifically, a reserved soil platform with a slope of 1:1 is retained at a distance of 1000 mm from the outer edge of the basement floor slab.

[0015] Furthermore, the specific steps for demolishing the internal support beams from bottom to top and constructing the main structure at the corresponding height while constructing the substructure under the linear accelerator floor slab or the linear accelerator structure are as follows:

[0016] Construct the basement floor slab, demolish the fourth support beam, and construct the main structure at the -3F level of the basement. Construct the outer wall of the basement up to the bottom elevation of the linear accelerator floor slab.

[0017] After the main structure at the -3F level of the basement reaches 75% of the design strength, construct the waterproofing of the outer wall of the basement and backfill the cement stone powder to 500 mm below the elevation of the -3F floor slab of the basement.

[0018] Construct 500 - mm - thick replacement support concrete, which is connected to the third waist beam.

[0019] Demolish the third internal support beam and construct the main structure at the -2F level of the basement, the linear accelerator floor slab, and the partial outer wall of the linear accelerator.

[0020] Demolish the second internal support beam and construct the main structure at the -1F level of the basement, the outer wall of the linear accelerator, the partial top slab of the linear accelerator, and the replacement support short columns. The top elevation of the horizontal construction joint of the linear accelerator top slab is kept consistent with the elevation of the -1F floor slab of the basement.

[0021] Demolish the first internal support beam and construct the remaining basement roof slab of the linear accelerator.

[0022] Furthermore, a V - shaped construction joint is set on the outer wall of the linear accelerator, and the top elevation of the V - shaped construction joint is kept consistent with the elevation of the -2F floor slab of the basement.

[0023] Further, the construction joint between the main structure of the first construction section, the main structure of the second construction section at the underground -2F level and the floor slab of the linear accelerator is set at 1 / 3 of the main span near the linear accelerator side.

[0024] Further, the construction joint between the main structure of the first construction section at the underground -1F level, the main structure of the second construction section at the underground -1F level and the outer wall of the linear accelerator is set at 1 / 3 of the main span near the linear accelerator side.

[0025] Further, when the lattice column is within the scope of the linear accelerator, the lattice column is cleaned and directly poured into the concrete of the linear accelerator.

[0026] Further, steel formwork is erected inside the lattice column, and the steel formwork is welded and fixed to the angle irons at the four corners of the lattice column. The horizontal steel bars of the floor slab, wall and roof slab of the linear accelerator pass through and around the lattice column. When there is no batten plate at the horizontal steel bars of the floor slab, wall and roof slab of the linear accelerator, the horizontal steel bars of the floor slab, wall and roof slab blocked by the angle irons at the four corners of the lattice column pass through by bending, and the bending ratio is not greater than 1:6. When there is a batten plate at the horizontal steel bars of the floor slab, wall and roof slab, the horizontal steel bars of the floor slab, wall and roof slab blocked by the batten plate pass through by bending 15d and are double-sided welded to the batten plate, and the welding length is 6d.

[0027] The embodiment of the present invention has the following beneficial effects:

[0028] The present invention solves a new shape and position for setting the construction joint of a linear accelerator, and solves technical problems such as the earthwork excavation sequence and method during the construction of the linear accelerator and the main structure (sharing piles, columns, and walls with the main structure), the demolition sequence of the concrete internal support for the foundation pit support, the conflict between the linear accelerator and the lattice column of the internal support, and the concrete pouring sequence during the construction of the linear accelerator and the main structure.

[0029] In the solution of the present invention, the reserved soil platform is retained, saving the amount of earthwork excavation and backfilling, and having a small construction difficulty.

[0030] The present invention realizes the risk of avoiding ray leakage at a low cost and ensures the safety of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the reserved soil platform under the floor slab of the linear accelerator in the embodiment of the present invention;

[0032] Figure 2 Schematic diagram of the construction joint setting of the basement -3F outer wall in the embodiment of the present invention;

[0033] Figure 3 Schematic diagram of the replacement support concrete in the embodiment of the present invention;

[0034] Figure 4 Schematic diagram of the backfill of the foundation of the linear accelerator floor in the embodiment of the present invention;

[0035] Figure 5 Schematic diagram of the construction of the linear accelerator floor and the basement - 2F in the embodiment of the present invention;

[0036] Figure 6 Schematic diagram of the construction of the outer wall of the linear accelerator and the basement - 1F in the embodiment of the present invention;

[0037] Figure 7 Schematic diagram of the construction of the remaining roof slab of the linear accelerator in the embodiment of the present invention;

[0038] Figure 8 Schematic diagram of the horizontal construction sequence of the linear accelerator floor and the basement - 2F in the embodiment of the present invention;

[0039] Figure 9 Schematic diagram of the horizontal construction sequence of the outer wall of the linear accelerator and the basement - 1F in the embodiment of the present invention;

[0040] Figure 10 Schematic diagram of the installation of steel bars and formwork when the lattice column is inside the linear accelerator in the embodiment of the present invention;

[0041] Figure 11 For Figure 10 Section 1 - 1 in (Schematic diagram of the installation when there are gusset plates at the horizontal steel bars of the linear accelerator floor, wall, and roof slab);

[0042] Figure 12 For Figure 10 Section 2 - 2 in (Schematic diagram of the installation when there are no gusset plates at the horizontal steel bars of the linear accelerator floor, wall, and roof slab). Detailed implementation manners

[0043] The following further introduces the present application in combination with embodiments.

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, in the following description, different "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Different embodiments can be replaced or combined. For those of ordinary skill in the art, without creative efforts, other implementation manners can also be obtained based on these embodiments.

[0045] At present, the main construction of linear accelerators usually adopts the three-stage casting method. Two horizontal tongue-and-groove construction joints are left along the circumference of the linear accelerator at 500mm above the bottom plate and 500mm below the top plate. Since the radiation emitted by the radioactive source in the linear accelerator is radial, the thickness of the concrete will be locally weakened at the tongue-and-groove joints. After subsequent radiation detection, the radiation leakage at the tongue-and-groove joints will exceed the standard equivalent. Therefore, it is necessary to use lead plates to locally reinforce the upper and lower tongue-and-groove joints of the exterior wall. Although this method is convenient for construction, it increases the cost very much. At the same time, the radiation at the tongue-and-groove joints needs to be monitored for a long time to prevent radiation leakage from causing serious consequences such as casualties.

[0046] On the other hand, at present, linear accelerators are all independent buildings, designed and constructed separately from the main structure of the hospital. However, since most hospitals are located in the city center, especially in large cities, in order to alleviate the land shortage, the main structure of the basement and the linear accelerator are gradually designed as one. Due to the special requirements of the linear accelerator, the construction sequence of the basement main body and the linear accelerator is quite different, which further increases the difficulty of linear accelerator construction.

[0047] The present invention solves the above problems through the following technical solutions:

[0048] Combine Figures 1-12 A method for constructing a medical linear accelerator connected to a basement body comprises the following steps:

[0049] The vertical construction sequence of the basement main structure and linear accelerator is as follows:

[0050] Excavate the linear accelerator area to the bottom elevation of the fourth support beam 34, then leave a reserved soil platform 4 at the outer edge of the basement floor 5; and construct the basement floor 5;

[0051] Remove the inner support beams from bottom to top and construct the main structure of the corresponding height, and at the same time construct the lower structure of the linear accelerator base plate 9 or the linear accelerator structure;

[0052] Construction of the remaining basement roof slab 15 of the linear accelerator;

[0053] The construction sequence of the main structure of the basement and the linear accelerator level is as follows:

[0054] The main structure 111 of the first construction section at the underground -2F level is constructed, followed by the main structure 112 of the second construction section at the underground -2F level, and finally the main structure 113 of the third construction section at the underground -2F level is constructed simultaneously with the linear accelerator base plate 9;

[0055] Construct the main structure 131 of the first construction section at the underground -1F level, then construct the main structure 132 of the second construction section at the underground -1F level, and finally construct the main structure 133 of the third construction section at the underground -1F level and the outer wall 12 of the linear accelerator simultaneously (the attached figure mark 1 is the retaining pile).

[0056] The vertical construction sequence of the basement main structure and the linear accelerator is as follows:

[0057] Excavate the soil in the linear accelerator area to the bottom elevation of the fourth support beam 34, and then reserve a soil platform 4 with a slope of 1:1 at a distance of 1000 mm from the outer edge of the basement floor 5, saving the amount of soil excavation and backfilling and ensuring the safety of the foundation pit support on one side of the linear accelerator.

[0058] Construct the basement floor 5, demolish the fourth support beam 34 and construct the main structure of the underground -3F 6. The usual method is to make a 500 - mm - high sill on the underground exterior wall, while in this invention patent, the underground exterior wall is constructed to the bottom elevation of the linear accelerator floor 9.

[0059] After the main structure of the underground -3F 6 reaches 75% of the design strength, construct the waterproofing of the underground exterior wall and backfill the cement stone powder 7 to a position 500 mm below the floor elevation of the underground -3F 6.

[0060] Construct the 500 - mm - thick replacement support concrete 8. The replacement support concrete 8 must be connected to the third - level waist beam 2. Here, the replacement support concrete 8 needs to be internally equipped with double - layer and double - way C22@200 steel bars to ensure that the second support beam 32 can be in a condition where it can be demolished after being poured in one go due to the too high floor height of the linear accelerator and without the replacement support concrete.

[0061] Demolish the third - level internal support beam 33 and construct the main structure of the underground -2F 11, the linear accelerator floor and the local outer wall of the linear accelerator. The outer wall must be provided with a V - shaped construction joint 10, and the top elevation of the V - shaped construction joint 10 is kept consistent with the floor elevation of the underground -2F 11.

[0062] Demolish the second - level internal support beam 32 and construct the main structure of the underground -1F 13, the outer wall of the linear accelerator, the local top plate of the linear accelerator and the 400*400 replacement support short column 14. One 400*400 replacement support short column 14 must be set for each cast - in - place pile. The top elevation of the horizontal construction joint of the linear accelerator top plate is kept consistent with the floor elevation of the underground -1F 13.

[0063] Demolish the first - level internal support beam 31 and construct the remaining basement top plate 15 of the linear accelerator.

[0064] The horizontal construction sequence of the basement main structure and the linear accelerator is as follows:

[0065] Construct the main structure 111 of the first construction section at the underground -2F level, then construct the main structure 112 of the second construction section at the underground -2F level, and finally construct the main structure 113 of the third construction section at the underground -2F level and the linear accelerator floor slab 9 simultaneously. The construction joint 181 between the main structure 111 of the first construction section, the main structure 112 of the second construction section at the underground -2F level and the linear accelerator floor slab 9 must be set at 1 / 3 of the main span near the linear accelerator side.

[0066] Construct the main structure 131 of the first construction section at the underground -1F level, then construct the main structure 132 of the second construction section at the underground -1F level, and finally construct the main structure 133 of the third construction section at the underground -1F level and the linear accelerator outer wall 12 simultaneously. The construction joint 181 between the main structure 131 of the first construction section at the underground -1F level, the main structure 132 of the second construction section at the underground -1F level and the linear accelerator outer wall 12 must be set at 1 / 3 of the main span near the linear accelerator side.

[0067] Treatment method when the lattice column is within the scope of the linear accelerator

[0068] When the lattice column is within the scope of the linear accelerator, since the linear accelerator floor slab, wall and roof need to be poured in one go, it is not possible to use the usual method of leaving holes around the lattice column and then plugging them after the lattice column is removed. Since the steel structure is denser than concrete, cleaning the lattice column and directly pouring it into the linear accelerator concrete will not cause ray leakage. Therefore, in this invention patent, a steel formwork 16 is supported inside the lattice column, and the steel formwork 16 is welded and fixed to the angle irons 17 at the four corners of the lattice column. The horizontal steel bars 19 of the linear accelerator floor slab, wall and roof pass through and around the lattice column. When there is no batten plate 18 at the horizontal steel bars 19 of the linear accelerator floor slab, wall and roof, the horizontal steel bars 19 of the floor slab, wall and roof blocked by the angle irons 17 at the four corners of the lattice column pass through by bending, and the bending ratio is not greater than 1:6. When there is a batten plate 18 at the horizontal steel bars 19 of the floor slab, wall and roof, the horizontal steel bars 19 of the floor slab, wall and roof blocked by the batten plate 18 pass through by bending 15d and are double-sided welded to the batten plate 18, and the welding length is 6d.

[0069] It should be noted that the above embodiments can be freely combined as needed. The above introduction is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A construction method for a medical linear accelerator connected to a basement body, characterized in that: It includes the following steps: Vertical construction sequence of the basement main structure and the linear accelerator: Excavate the soil in the linear accelerator area to the bottom elevation of the fourth support beam (34), and then reserve a soil platform (4) at the outer edge of the basement floor slab (5); construct the basement floor slab (5); Remove the internal support beams sequentially from bottom to top and construct the main structure at the corresponding height, and at the same time construct the lower structure of the linear accelerator floor slab (9) or construct the linear accelerator structure; the specific steps are as follows: Construct the basement floor slab (5), remove the fourth support beam (34) and construct the main structure of the -3F (6) underground, and construct the exterior wall of the basement to the bottom elevation of the linear accelerator floor slab (9); After the main structure of the -3F (6) underground reaches 75% of the designed strength, construct the waterproofing of the exterior wall of the basement and backfill the cement stone powder (7) to 500 mm below the floor elevation of the -3F (6) underground; Construct the 500-mm-thick replacement support concrete (8), and the replacement support concrete (8) is connected to the third waist beam (2); Remove the third internal support beam (33) and construct the main structure of the -2F (11) underground, the linear accelerator floor slab and the partial exterior wall of the linear accelerator; Remove the second internal support beam (32) and construct the main structure of the -1F (13) underground, the exterior wall of the linear accelerator, the partial top slab of the linear accelerator and the replacement support short column (14). The top elevation of the horizontal construction joint of the linear accelerator top slab is the same as the floor elevation of the -1F (13) underground; Remove the first internal support beam (31) and construct the remaining basement top slab (15) of the linear accelerator; Construct the remaining basement top slab (15) of the linear accelerator; Horizontal construction sequence of the basement main structure and the linear accelerator: Construct the main structure (111) of the first construction section of the -2F underground horizontally, then construct the main structure (112) of the second construction section of the -2F underground horizontally, and finally construct the main structure (113) of the third construction section of the -2F underground horizontally and the linear accelerator floor slab (9) simultaneously; Construct the main structure (131) of the first construction section of the -1F underground horizontally, then construct the main structure (132) of the second construction section of the -1F underground horizontally, and finally construct the main structure (133) of the third construction section of the -1F underground horizontally and the exterior wall (12) of the linear accelerator simultaneously.

2. The construction method of the medical linear accelerator connected to the basement main body according to claim 1, characterized in that, The specific method of reserving the soil platform (4) at the outer edge of the basement floor slab (5) is as follows: reserve a soil platform (4) with a slope of 1:1 at 1000 mm away from the outer edge of the basement floor slab (5).

3. The construction method of the medical linear accelerator connected to the basement main body according to claim 2, characterized in that, A V-shaped construction joint (10) is set on the exterior wall of the linear accelerator, and the top elevation of the V-shaped construction joint (10) is the same as the floor elevation of the -2F (11) underground.

4. The construction method of the medical linear accelerator connected to the basement main body according to claim 1, characterized in that, The construction joint (181) between the main structure (111) of the first construction section, the main structure (112) of the second construction section of the -2F underground horizontally and the linear accelerator floor slab (9) is set at 1 / 3 of the main span near the linear accelerator side.

5. The construction method of the medical linear accelerator connected to the basement main body according to claim 1, characterized in that, The construction joint (181) between the main structure (131) of the first construction section, the main structure (132) of the second construction section of the -1F underground horizontally and the exterior wall (12) of the linear accelerator is set at 1 / 3 of the main span near the linear accelerator side.

6. The construction method of the medical linear accelerator connected to the basement main body according to claim 1, characterized in that When the lattice column is located within the range of the linear accelerator, the lattice column is cleaned and directly cast into the concrete of the linear accelerator.

7. The construction method of the medical linear accelerator connected to the basement main body according to claim 6, characterized in that, A steel template (16) is supported in the lattice column. The steel template (16) is welded and fixed to the angle irons (17) at the four corners of the lattice column. The horizontal steel bars (19) of the bottom plate, wall and top plate of the linear accelerator pass through and around the lattice column. When there is no gusset plate (18) at the horizontal steel bars (19) of the bottom plate, wall and top plate of the linear accelerator, the horizontal steel bars (19) of the bottom plate, wall and top plate blocked by the angle irons (17) at the four corners of the lattice column pass through by bending, and the bending ratio is not greater than 1:

6. When there is a gusset plate (18) at the horizontal steel bars (19) of the bottom plate, wall and top plate, the horizontal steel bars (19) of the bottom plate, wall and top plate blocked by the gusset plate (18) are bent by 15d and welded to the gusset plate (18) on both sides, and the welding length is 6d.

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