Construction method of double-hole common-wall inclined pipe gallery

Abstract

The present application relates to pipe gallery construction technical field, especially double hole common wall inclined pipe gallery construction method, the double hole common wall inclined pipe gallery includes side by side setting first gallery and second gallery, the side wall of the first gallery and the second gallery is common, the first gallery and the second gallery are all inclined setting along the same direction, the lower end of the first gallery is lower than the lower end of the second gallery, the upper end of the first gallery is flush with the upper end of the second gallery, including the following steps: construction the lower half of the first gallery lower half; construction the upper half of the first gallery lower half; construction the upper half of the first gallery upper half; construction the upper half of the first gallery upper half; construction the lower half of the second gallery lower half; construction the lower half of the second gallery upper half; construction the whole upper half of the second gallery. The present application reduces the number of construction joints in the common side wall in the up-down direction, and ensures the pipe gallery structure quality.

Description

Technical Field

[0001] This invention relates to the field of pipe gallery construction technology, and in particular to a construction method for a double-hole, shared-wall inclined pipe gallery. Background Technology

[0002] In the circulating water outlet corridor of a nuclear power plant, there are two corridors with varying heights in most areas. However, in a certain section, the two corridors are at the same height, gradually transitioning from vertical misalignment to complete overlap. Furthermore, in this section, the two corridors share a single sidewall. Compared to independent corridors, constructing a double-hole, shared-wall corridor presents significant challenges, further complicated by the inclined extension of the corridor. Moreover, the shared sidewall requires meticulous attention to construction quality; excessive or excessively long vertical construction joints should be avoided, as these joints can lead to leaks and compromise the structural integrity of the corridor. Summary of the Invention

[0003] The purpose of this invention is to provide a construction method for a double-hole shared-wall inclined pipe gallery, which reduces the number of construction joints in the vertical direction of the shared sidewall and ensures the structural quality of the double-hole shared-wall inclined pipe gallery.

[0004] To achieve the above objectives, a construction method for a double-hole shared-wall inclined pipe gallery is provided. The double-hole shared-wall inclined pipe gallery includes a first gallery and a second gallery arranged side-by-side. The adjacent sidewalls of the first gallery and the second gallery are shared. Both the first gallery and the second gallery are inclined in the same direction. The lower end of the first gallery is lower than the lower end of the second gallery, and the upper end of the first gallery is flush with the upper end of the second gallery. The method includes the following steps:

[0005] Construction is underway on the lower half of the lower section of the first corridor.

[0006] Construction of the upper half of the lower half of the first corridor;

[0007] Construction of the upper half of the upper section of the first corridor;

[0008] Construction of the upper half of the upper section of the first corridor;

[0009] Construction is underway on the lower half of the lower section of the second corridor.

[0010] Construction is underway on the lower half of the upper section of the second corridor;

[0011] Construction is underway on the entire upper section of the second corridor.

[0012] In some embodiments, the construction of the upper half of the lower half of the first corridor and the construction of the lower half of the second corridor are carried out simultaneously.

[0013] In some embodiments, the construction of the lower half of the upper section of the first corridor and the construction of the lower half of the upper section of the second corridor are carried out simultaneously.

[0014] In some embodiments, the construction of the upper half of the first corridor and the construction of the entire upper half of the second corridor are carried out simultaneously.

[0015] In some embodiments, the construction includes the following steps:

[0016] Determine the model outline of the construction area;

[0017] Erect scaffolding according to the shape of the model;

[0018] Based on the shape of the model, a steel reinforcement frame is formed.

[0019] Based on the shape of the model, a template is installed on the steel reinforcement frame, and the template forms a mold cavity that matches the shape of the model;

[0020] Concrete is poured into the mold cavity.

[0021] In some embodiments, the reinforcing steel frame includes a first reinforcing steel bar and a second reinforcing steel bar, the first reinforcing steel bar being located at the top and / or bottom of the model, the second reinforcing steel bar being located on the side of the model, and the second reinforcing steel bar being fixedly connected to the scaffolding via a connecting rod.

[0022] In some embodiments, when the template is disposed in the inner region of the upper half of the first corridor or the second corridor, the following steps are further included:

[0023] A support frame is installed on the lower half of the first or second corridor that has been completed. The support frame includes at least two support units. The support units are arranged at an inclination along the inclination direction of the first or second corridor. A reinforcing rod is installed between at least two adjacent support units. A first pad and a second pad are respectively installed at the lower and upper ends of the support units. The upper surface of the first pad is a horizontal plane, and the lower surface of the second pad is a horizontal plane. The upper and lower ends of the support units are respectively connected to the lower surface of the second pad and the upper surface of the first pad.

[0024] The template is placed above the second pad.

[0025] In some embodiments, pouring concrete into the mold cavity includes the following steps:

[0026] A wire mesh is provided at the bottom and / or top of the mold cavity, wherein the mesh size of the wire mesh does not exceed 15mm × 15mm;

[0027] A steel mesh is provided on the side of the mold cavity;

[0028] Concrete is poured in layers according to the preset thickness, from low to high.

[0029] Compared with existing technologies, the advantages of this invention are as follows: Since the lower half of the first corridor is located below the lower half of the second corridor, and the first and second corridors share only a very small portion of the sidewall in the lower half, constructing the lower half of the first corridor first will not affect the construction of the second corridor, ensuring that the subsequent construction of both corridors can proceed normally and reducing construction difficulty. When constructing the upper half of the first and second corridors, the entire upper half of the second corridor is constructed simultaneously, ensuring that the upper half of the shared sidewall on the side facing the second corridor has no vertically extending construction joints, preventing leakage and ensuring the structural quality of the utility tunnel. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a double-hole, shared-wall inclined tube gallery provided in an embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of the lower half of the first construction corridor provided in an embodiment of the present invention.

[0032] Figure 3 This is a schematic diagram illustrating the simultaneous construction of the upper half of the lower half of the first corridor and the lower half of the second corridor, as provided in an embodiment of the present invention.

[0033] Figure 4 This is a schematic diagram illustrating the simultaneous construction of the lower half of the upper section of the first corridor and the lower half of the upper section of the second corridor, as provided in an embodiment of the present invention.

[0034] Figure 5 This is a schematic diagram illustrating the simultaneous construction of the upper half of the first corridor and the entire upper half of the second corridor, as provided in an embodiment of the present invention.

[0035] Figure 6 This is a schematic diagram of the construction joint of a double-hole, shared-wall inclined pipe gallery provided in an embodiment of the present invention.

[0036] Figure 7 This is a schematic diagram of scaffolding erection provided in an embodiment of the present invention.

[0037] Figure 8 for Figure 7 Cross-sectional view at point AA.

[0038] Figure 9 This is a schematic diagram of a steel reinforcement cage provided in an embodiment of the present invention.

[0039] Figure 10 for Figure 9 Cross-sectional view at point BB.

[0040] Figure 11 This is a schematic diagram of the lower half of the mold cavity of the lower half of the first corridor formed by the template, provided in an embodiment of the present invention.

[0041] Figure 12 This is a schematic diagram of the upper half of the mold cavity of the lower half of the first corridor formed by the template, provided in an embodiment of the present invention.

[0042] Figure 13 This is a schematic diagram of a support frame provided in an embodiment of the present invention.

[0043] Figure 14 for Figure 13 A magnified view of a section at point C.

[0044] Figure 15 This is a schematic diagram illustrating the thickness distribution of each layer of concrete during layered concrete pouring, as provided in an embodiment of the present invention.

[0045] In the diagram: 1. First corridor; 2. Second corridor; a. First dashed line; b. Second dashed line; c. Third dashed line; 31. First area; 32. Second area; 33. Third area; 34. Fourth area; 4. Scaffolding; 41. Upright; 42. Horizontal bar; 43. Connecting rod; 51. First reinforcing bar; 52. Second reinforcing bar; 53. First scissor brace; 61. First internal formwork; 611. First steel pipe; 62. First external formwork; 621. First tie rod; 63. Second internal formwork; 631. Second steel pipe; 64. Second external formwork; 641. Second tie rod; 7. Support frame; 71. Upright; 72. Horizontal bar; 73. First pad; 74. Second pad; 75. Reinforcing rod; 76. Second scissor brace; 81. Lower concrete; 82. Middle concrete; 83. Upper concrete. Detailed Implementation

[0046] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings, not all of them.

[0047] This invention defines certain directional terms. Unless otherwise stated, the directional terms used, such as "up," "down," "left," "right," "inner," and "outer," are used for ease of understanding and therefore do not constitute a limitation on the scope of protection of this invention.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] Figure 1 This is a schematic diagram of a double-hole, shared-wall inclined tube gallery (hereinafter referred to as the tube gallery) provided in an embodiment of the present invention. Please refer to... Figure 1 The utility tunnel includes a first corridor 1 and a second corridor 2 arranged side by side. Both corridors 1 and 2 slope in the same direction; in this embodiment, the left side is lower than the right. Along the length of the utility tunnel ( Figure 1 (in the left and right directions), the left ends of the first corridor 1 and the left ends of the second corridor 2 are aligned with each other, and the right ends of the first corridor 1 and the right ends of the second corridor 2 are aligned with each other; in the height direction of the utility tunnel ( Figure 1 (In the vertical direction), the left end of the first corridor 1 is lower than the left end of the second corridor 2, and the right end of the first corridor 1 is at the same height as the right end of the second corridor 2. Therefore, the angle between the first corridor 1 and the horizontal direction is greater than the angle between the second corridor 2 and the horizontal direction, and the adjacent side walls of the first corridor 1 and the second corridor 2 are at least partially shared.

[0051] Figure 1 The image also shows the first dashed line a, the second dashed line b, and the third dashed line c. Figure 1 The first dashed line a in the figure is the center line of the length direction of the first corridor 1 and the second corridor 2. In this embodiment, the parts of the first corridor 1 and the second corridor 2 to the left of the center line are defined as the lower half of the first corridor 1 and the lower half of the second corridor 2, respectively. The parts of the first corridor 1 and the second corridor 2 to the right of the center line are defined as the upper half of the first corridor 1 and the upper half of the second corridor 2, respectively. Figure 1The second dashed line b is the line connecting the midpoints in the height direction of each longitudinal section of the first corridor 1. In this embodiment, the parts of the first corridor 1 located above and below the second dashed line b are defined as the upper half and lower half of the first corridor 1, respectively. Figure 1 The third dashed line c is the line connecting the centerlines in the height direction in each longitudinal section of the second corridor 2. In this embodiment, the parts of the second corridor 2 located above and below the third dashed line c are defined as the upper half of the second corridor 2 and the lower half of the second corridor 2, respectively.

[0052] It should be noted that in other embodiments, the first dashed line a can also be at other positions along the length of the utility tunnel, such as one-third, two-fifths, or four-sevenths of the length. The second dashed line b can also be a line connecting other positions along the height direction in each longitudinal section of the first tunnel 1, such as one-third, two-fifths, or four-sevenths of the height direction. The third dashed line can also be a line connecting other positions along the height direction in each longitudinal section of the second tunnel 2, such as one-third, two-fifths, or four-sevenths of the height direction.

[0053] Since the first corridor 1 and the second corridor 2 are initially superimposed vertically from the left end and gradually overlap completely in the height direction at the right end, in order to avoid too many vertical construction joints on the side wall shared by the first corridor 1 and the second corridor 2, which could lead to water leakage and affect the water flow quality of the corridor, the entire pipe gallery is constructed in four stages in this embodiment. The purpose is to minimize the number of construction joints on the shared side wall and ensure the structural quality of the corridor.

[0054] Figures 2 to 5 The diagrams illustrate the four stages in sequence. First, as shown... Figure 2 As shown, the lower half of the lower section of the first utility tunnel 1 is under construction; then, as... Figure 3 As shown, simultaneously construct the upper half of the lower section of the first corridor 1 and the lower half of the lower section of the second corridor 2; then, as... Figure 4 As shown, the lower half of the upper section of the first corridor 1 and the lower half of the upper section of the second corridor 2 are constructed simultaneously; finally, as... Figure 5 As shown, the upper half of the upper section of the first corridor 1 and the entire upper half of the second corridor 2 are being constructed simultaneously.

[0055] Therefore, the final construction joint on the shared side wall of the utility tunnel is as follows: Figure 6 As shown, the construction joints on the shared sidewall are mainly formed by four major areas. Among them, the first area 31, located in the lower left corner, is formed by the first stage of construction, corresponding to... Figure 2 The second area 32, located in the middle of the left side, was formed during the second phase of construction, corresponding to... Figure 3 The third area 33, located on the lower right side, was formed during the third phase of construction, corresponding to... Figure 4The fourth area 34 located above was formed during the fourth stage of construction, corresponding to... Figure 5 .observe Figure 6 The construction joints can be observed to extend generally in the left-right direction between the first region 31 and the second region 32, between the third region 33 and the fourth region 34, and between the second region 32 and the fourth region 34. Only in the middle of the pipe gallery, namely between the first region 31 and the third region 33 and between the second region 32 and the third region 33, do the construction joints extend in the vertical direction. It can be seen that the division of the above four construction stages minimizes the formation of vertical construction joints, which is conducive to ensuring the quality of the pipe gallery.

[0056] It should be noted that in other embodiments, Figure 3 In the process, the upper half of the lower half of the first corridor 1 and the lower half of the lower half of the second corridor 2 can be constructed separately. Figure 4 In the process, the lower half of the upper section of the first corridor 1 and the lower half of the upper section of the second corridor 2 can be constructed separately. Figure 5 In this process, the upper half of the first corridor 1 and the entire upper half of the second corridor 2 can be constructed separately. However, to improve construction efficiency, the above construction processes are best carried out simultaneously.

[0057] Before the first phase of construction, it is necessary to carry out surveying and setting out, pouring of the subbase, and erection of scaffolding.

[0058] Surveying and setting out refers to surveying and setting out the ground where the utility tunnel is located. Specifically, it involves taking detailed measurements of the dimensions and elevation of the entire foundation, determining the outer boundary line of the utility tunnel based on the design drawings, and marking it with steel reinforcement piles.

[0059] Subbase pouring refers to the pouring of a subbase of concrete within a defined outer boundary line. The purpose of the subbase is to level the uneven ground where the utility tunnel is located, facilitating subsequent construction. The subbase can be poured in sections or all at once, depending on site conditions. Sectional pouring is preferred. During pouring, a concrete pump truck is used to gradually advance the concrete from one end of the utility tunnel to the other. To allow for free expansion and contraction of the utility tunnel concrete, the surface of the subbase concrete must be smooth and polished, and water curing should be carried out after pouring.

[0060] Erecting scaffolding refers to setting up scaffolding outside the outer boundary line of the first corridor 1 or the second corridor 2 to facilitate subsequent formwork installation. The scaffolding can be a modular, clip-on type. For example... Figure 7As shown, scaffolding 4 includes two or more uprights 41 and two or more horizontal bars 42. The lower ends of the uprights 41 are fixedly placed on the base layer, and the lateral spacing between the uprights 41 is no more than 1.2m. The horizontal bars 42 are fixedly placed on the uprights 41, and the longitudinal spacing between the horizontal bars 42 is 1.8m. In addition, planks are laid in the areas where people need to walk. To facilitate the subsequent installation of formwork, the distance between the upright 41 closest to the first corridor 1 or the second corridor 2 and the outer boundary line of the corresponding corridor is no less than 400mm.

[0061] It should be noted that, apart from the different shapes of the target area models, the construction processes for the four stages described above are almost identical, all including at least: forming a steel reinforcement framework, installing formwork on the steel reinforcement framework, and pouring concrete. Therefore, in this embodiment, each stage will not be described in detail, but mainly the construction process of the first stage will be described. The other stages can be implemented with reference to the first stage.

[0062] like Figure 7 As shown, when constructing the steel reinforcement frame, it is necessary to install a first steel bar 51 and a second steel bar 52. The first steel bar 51 is located at the bottom of the lower half of the first corridor 1, and the second steel bar 52 is located on both sides of the first corridor 1. The first steel bars 51 and the second steel bars 52 can be fixed together by binding. In addition, to prevent the second steel bar 52 from shifting under external forces, the second steel bar 52 can be fixedly connected to the scaffolding 4. Specifically, as shown... Figure 7 and Figure 8 As shown, a connecting rod 43 extends from the scaffold 4 toward the second reinforcing bar 52, and the inner end of the connecting rod 43 is tied and fixed to the second reinforcing bar 52.

[0063] Figure 9 A schematic diagram of the final steel reinforcement cage is shown. Figure 10 for Figure 9 Cross-sectional view at point BB, as shown Figure 10 As shown, the second reinforcing bar 52 can also be fixed by a first scissor brace 53 made of reinforcing bar. The first scissor brace 53 is tied to the reinforcing bar, and two adjacent first scissor braces 53 form a triangle, thereby enhancing stability.

[0064] Figure 11 This diagram illustrates the lower half of the mold cavity of the lower section of the first corridor 1 formed by a template, according to an embodiment of the present invention. Please refer to... Figure 11A first internal formwork 61 is installed on the inner side of the lower half of the lower section of the first corridor 1. The first internal formwork 61 is fixedly installed on the steel reinforcement frame. Two opposing first internal formworks 61 in the left-right direction are connected top to top by a first steel pipe 611. A first external formwork 62 is installed on the outer side of the lower half of the lower section of the first corridor 1. Two opposing first external formworks 62 in the left-right direction are fixedly connected by a first tie rod 621.

[0065] Figure 12 This is a schematic diagram of the upper half of the mold cavity of the lower half of the first corridor 1 formed by the template, provided in an embodiment of the present invention. Please refer to... Figure 12 A second internal formwork 63 is installed on the inner side of the upper half of the lower section of the first corridor 1. The second internal formwork 63 is fixedly installed on the steel reinforcement frame, and the two opposing second internal formworks 63 are connected top to top by a second steel pipe 631. The second internal formwork 63 located at the top of the inner area is fixed by a support frame 7, and the lower end of the support frame 7 is fixedly installed on the lower half of the lower section of the first corridor 1, which has already been constructed. A second external formwork 64 is installed on the outer side of the upper half of the lower section of the first corridor 1, and the two opposing second external formworks 64 are fixedly connected by a second tie rod 641.

[0066] Figure 13 A schematic diagram of the support frame 7 installed within the first corridor 1 is shown. Please refer to [link / reference needed]. Figure 13 The support frame 7 is used to support the template located at the top inner side of the first corridor 1. The support frame 7 includes at least two support units, which are arranged obliquely along the inclined direction of the first corridor 1. The lower end of the support unit is fixedly set on the lower half of the first corridor 1 that has been constructed. Since the upper and lower surfaces of the first corridor 1 are inclined, and conventional support frames 7 can only be installed on a horizontal surface, the support frame 7 in this embodiment has been improved.

[0067] First, because the first corridor 1 extends at an angle, it is impossible to connect all the support units together with a single horizontally extending rod, as is the case with a conventional support frame. Therefore, in this embodiment, multiple horizontally extending reinforcing rods 75 are provided. Each reinforcing rod 75 connects at least two adjacent support units, with a span's distance between adjacent vertical reinforcing rods 75. Furthermore, second scissor braces 76 are provided on both sides of the support frame 7. These second scissor braces 76 increase the longitudinal stability of the support frame 7, and the angle between the scissor braces and the horizontal direction is between 45° and 60°. This maximizes the stability and safety of the connections between the support units.

[0068] Secondly, because the first corridor 1 extends at an angle, the lower and upper ends of the support unit cannot be directly connected to the inclined surface. Therefore, as Figure 14As shown, the support unit includes two longitudinally arranged columns 71 and a horizontal bar 72 connecting the two columns 71. A first pad 73 is provided at the lower end of each column 71. The lower surface of the first pad 73 is at the same angle as the inclination of the first corridor 1. The lower surface of the first pad 73 is fixedly placed on the inner surface of the already constructed first corridor 1. The upper surface of the first pad 73 is horizontal. The lower end of the column 71 is fixedly placed on the upper surface of the first pad 73. A second pad 74 is provided at the upper end of each column 71. The lower surface of the second pad 74 is horizontal. The upper end of the column 71 is fixedly placed on the lower surface of the second pad 74. The upper surface of the second pad 74 is at the same angle as the inclination of the first corridor 1, facilitating the installation of the formwork. The columns 71 are placed on the first pad 73 and the second pad 74, solving the problem that the columns 71 cannot rest on the inclined surface.

[0069] It should be noted that the first pad 73 and the second pad 74 can be made of angle iron (angle steel), and the angle iron is fixedly welded to the I-beam used for installing the template at the corresponding position.

[0070] When pouring concrete for the slope section, a layered pouring method is used, and the thickness of each layer is controlled as follows: Figure 15 As shown. Specifically, the lower concrete 81 is poured in layers of 300mm thickness, the middle concrete 82 is poured in layers of 500mm thickness, and the upper concrete 83 is poured in layers of 300mm thickness. This thickness effectively ensures sufficient vibration of the concrete, which is beneficial to ensuring the quality of the concrete.

[0071] When pouring concrete, start from the lowest elevation and gradually work upwards. The concrete slump should be controlled to a low value that does not affect the pouring process. The pouring speed should be adjusted accordingly based on the concrete slump and should not be too fast. The time interval between pouring two adjacent layers of concrete should not exceed the initial setting time of the concrete. When vibrating the concrete, the spacing between the vibrators should generally be around 500mm, and the vibration time should generally be 20-30 seconds. A second vibration should be performed, inserting the vibrator 5-10cm into the lower layer. Each vibration point must be fully vibrated, following the "quick insertion, slow withdrawal" principle, especially at the expansion joints at both ends. Careful vibration is required, and the formwork and reinforcing steel frame must not be vibrated.

[0072] The most important aspect of pouring concrete on a slope is to eliminate the construction safety and quality risks caused by the tendency of the poured concrete to slide down the slope under gravity.

[0073] To prevent the concrete at the bottom and top of the utility tunnel from sliding down during the pouring process, a wire mesh with a mesh size of no more than 15cm x 15cm is laid on the reinforcing steel surface at the bottom and top. The small mesh size of the wire mesh will block the concrete and effectively prevent it from sliding and accumulating. The wire mesh is tied to the corresponding structural steel reinforcement with tie wire. Pouring holes and vibration holes need to be made in the wire mesh to ensure the flatness of the structural surface and the safety of concrete pouring, thereby reducing the risk of sliding and collapse.

[0074] To prevent the concrete on the side of the utility tunnel from sliding down, a steel mesh is installed on the side wall of the tunnel. The spacing of the steel mesh can be adjusted according to the site conditions. The steel mesh is tied to the structural steel bars at the corresponding positions, and the thickness of the concrete cover layer is ensured to meet the requirements.

[0075] This invention solves the construction problem of double-hole inclined pipe gallery with shared wall, and ensures the construction safety and quality of large-size, high-slope double-hole stacked pipe gallery.

[0076] The foregoing description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A construction method for a double-hole, shared-wall inclined pipe gallery, characterized in that, The double-hole shared-wall inclined tube gallery includes a first gallery (1) and a second gallery (2) arranged side by side. The adjacent side walls of the first gallery (1) and the second gallery (2) are shared. The first gallery (1) and the second gallery (2) are both inclined in the same direction. The lower end of the first gallery (1) is lower than the lower end of the second gallery (2), and the upper end of the first gallery (1) is flush with the upper end of the second gallery (2). The gallery includes the following steps: Construction of the lower half of the lower section of the first corridor (1); Simultaneously construct the upper half of the lower half of the first corridor (1) and the lower half of the lower half of the second corridor (2); Simultaneously construct the lower half of the upper section of the first corridor (1) and the lower half of the upper section of the second corridor (2); as well as Simultaneously construct the upper half of the upper section of the first corridor (1) and the entire upper half of the second corridor (2).

2. The construction method for a double-hole shared-wall inclined pipe gallery according to claim 1, characterized in that, The construction process includes the following steps: Determine the model outline of the construction area; Based on the shape of the model, scaffolding is erected (4). Based on the shape of the model, a steel reinforcement frame is formed. Based on the shape of the model, a template is installed on the steel reinforcement frame, and the template forms a mold cavity that matches the shape of the model; Concrete is poured into the mold cavity.

3. The construction method for a double-hole shared-wall inclined pipe gallery according to claim 2, characterized in that, The steel reinforcement frame includes a first steel bar (51) and a second steel bar (52). The first steel bar (51) is located at the top and / or bottom of the model, and the second steel bar (52) is located on the side of the model. The second steel bar (52) is fixedly connected to the scaffold (4) by a connecting rod (43).

4. The construction method for a double-hole shared-wall inclined pipe gallery according to claim 2, characterized in that, When the template is set in the inner area of ​​the upper half of the first corridor (1) or the second corridor (2), the following steps are also included: A support frame (7) is installed on the lower half of the first corridor (1) or the second corridor (2) that has been completed. The support frame (7) includes at least two support units. The support units are arranged at an inclination along the inclination direction of the first corridor (1) or the second corridor (2). A reinforcing rod (75) is installed between at least two adjacent support units. A first pad (73) and a second pad (74) are respectively installed at the lower end and the upper end of the support unit. The upper surface of the first pad (73) is a horizontal plane, and the lower surface of the second pad (74) is a horizontal plane. The upper end and the lower end of the support unit are respectively connected to the lower surface of the second pad (74) and the upper surface of the first pad (73). The template is placed above the second pad (74).

5. The construction method for a double-hole shared-wall inclined pipe gallery according to claim 2, characterized in that, The process of pouring concrete into the mold cavity includes the following steps: A wire mesh is provided at the bottom and / or top of the mold cavity, wherein the mesh size of the wire mesh does not exceed 15mm × 15mm; A steel mesh is provided on the side of the mold cavity; Concrete is poured in layers according to the preset thickness, from low to high.

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