A double-column structure based on prefabricated cup-mouth foundation and its construction method

Abstract

The present invention is a double-column structure based on a prefabricated cup-mouth foundation and a construction method thereof. A partition is provided in the channel of the prefabricated cup-mouth foundation, a temporary support is provided on the side of the first prefabricated column, and a distance-adjusting pad is installed on the side of the second prefabricated column. By optimizing the subsequent construction method, the problem that the prefabricated columns at the joints in the super-long prefabricated assembled building body cannot be used with the prefabricated cup-mouth foundation is solved. The purpose of sharing a prefabricated cup-mouth foundation with the double prefabricated columns is achieved under the premise of ensuring that the distance between the double prefabricated columns is controllable, so that the prefabricated assembled design with the prefabricated cup-mouth foundation can be fully applicable to super-long buildings.

Description

Technical Field

[0001] The invention relates to the field of assembled buildings, in particular to a double-column structure based on a prefabricated cup-mouth foundation and a construction method thereof. Background Art

[0002] At present, in order to realize the installation of prefabricated columns in prefabricated buildings, it is considered to set a prefabricated cup-mouth foundation at the bottom of the prefabricated columns on the first floor. The prefabricated cup-mouth foundation is a square reinforced concrete block with an upper and lower through-channel in the middle, and its bottom may be provided with steel bars extending downward. The prefabricated cup-mouth foundation is poured on the foundation body through cast-in-place concrete and after the cast-in-place concrete solidifies, the prefabricated column is placed in the prefabricated cup-mouth foundation. After adjusting the verticality and offset position of the prefabricated column by the wedge block, the high-strength grouting material is injected into the gap between the prefabricated column and the prefabricated cup-mouth foundation. After the high-strength grouting material solidifies, the installation of the prefabricated column is completed. It should be noted that in order to ensure that the prefabricated cup-mouth foundation can fix the prefabricated column, the side wall of the prefabricated cup-mouth foundation needs to ensure sufficient thickness (the wall thickness of the prefabricated cup-mouth foundation is about 20cm).

[0003] When constructing an extra-long prefabricated building, the building structure needs to be segmented, and a structural joint is set between two adjacent building structures. The structural joint also serves as an earthquake-resistant joint or a temperature joint. Therefore, there will be two frame columns with a small horizontal distance on both sides of the structural joint. According to the current specifications, the minimum distance between two adjacent frame columns should be no less than 7cm, and generally 10cm. If both frame columns are prefabricated columns and are combined with conventional prefabricated cup-shaped foundations, only the following three solutions can be used to achieve this:

[0004] Solution 1: Thin the wall thickness of the prefabricated cup base while ensuring strength;

[0005] Solution 2: Without changing the prefabricated cup mouth foundation structure, increase the distance between the two prefabricated columns;

[0006] Option 3: Make a prefabricated cup foundation that can accommodate two prefabricated columns;

[0007] Among the above schemes, Scheme 1 is not feasible based on the current performance of concrete materials. If Scheme 2 uses the existing prefabricated cup-mouth foundation, even if the two prefabricated cup-mouth foundations fit each other, considering that the wall thickness of the prefabricated cup-mouth foundation is about 20cm and the installation adjustment gap required for each of the two cup-mouth foundations (usually 7.5cm), the net distance between the two prefabricated columns will need to be greater than 55cm, which will have a greater impact on the building function. In Scheme 3, if the prefabricated cup-mouth foundation is set with two channels, there must be at least a 20cm thick isolation structure between the two channels and the installation adjustment gap required for each of the two frame columns (usually 7.5cm), which will cause the net distance between the two prefabricated columns to be greater than 35cm, which will also affect the building function. If only one channel is set, it will be difficult to adjust the verticality and position of the prefabricated columns during the hoisting process of the two prefabricated columns.

[0008] Therefore, how to design a double-column structure based on a prefabricated cup-shaped foundation that can meet the requirements of ultra-long prefabricated building structure joints is a technical difficulty that needs to be solved at present. Summary of the invention

[0009] The purpose of the present invention is to provide a double-column structure based on a prefabricated cup-mouth foundation and a construction method thereof, which optimizes the structure and construction method of the prefabricated cup-mouth foundation, the first prefabricated column and the second prefabricated column, and solves the problem that the prefabricated columns at the joints in an ultra-long prefabricated assembled building cannot be used in conjunction with the prefabricated cup-mouth foundation.

[0010] The present invention is realized by the following technical scheme: a double-column structure based on a prefabricated cup mouth foundation, comprising

[0011] The prefabricated cup-mouth foundation is a prefabricated foundation formed by pouring in one piece, having four reinforced concrete side walls and an upper and lower through channel in the middle, and the bottom of the reinforced concrete side walls is provided with extended steel bars extending downward; a partition is provided in the channel to divide the channel into a first channel and a second channel, and the horizontal height of the edge of the partition is lower than the horizontal height of the edge of the prefabricated cup-mouth foundation;

[0012] A first prefabricated column is installed in the first channel. A temporary support is provided on the side of the first prefabricated column. The main body of the temporary support is a horizontal support frame. The inner side of the horizontal support frame is connected to the side wall of the first prefabricated column. The outer side of the horizontal support frame is provided with an outwardly extending overlap portion. A slot hole adjacent to the overlap portion is also opened on the horizontal support frame, and a force transmission plate is installed on the inner edge of the slot hole;

[0013] A second prefabricated column is installed in the second channel, and a distance-adjusting pad is installed on the side of the second prefabricated column;

[0014] The prefabricated cup-mouth foundation is fixed on the foundation body by pouring the first cast-in-place concrete; wherein the first cast-in-place concrete in the channel has a height difference, the surface of the first cast-in-place concrete in the second channel is flush with the upper edge of the partition, and the surface of the first cast-in-place concrete in the first channel is flush with the lower edge of the partition;

[0015] The first precast column is hoisted and placed in the first channel, and the lower end of the first precast column is located in the space enclosed by the partition and the reinforced concrete side wall, the temporary support member faces the second channel direction, and the overlapping portion of the temporary support member overlaps the top surface of the reinforced concrete side wall. After the verticality and offset position of the first precast column are adjusted by the wedge block in the slot between the reinforced concrete side wall and the force transmission plate and the gap between the reinforced concrete side wall and the first precast column, the first high-strength grouting material is poured between the first precast column and the partition and between the first precast column and the reinforced concrete side wall. After the first high-strength grouting material is solidified, the wedge block and the temporary support member are removed;

[0016] The second precast column is hoisted and placed in the second channel, the lower end of the second precast column is located in the space enclosed by the reinforced concrete side wall and the first precast column, and the distance adjustment pad is abutted against the first precast column. After the verticality and offset position of the second precast column are adjusted by wedge blocks between the reinforced concrete side wall and the second precast column and between the reinforced concrete side wall and the first precast column, the second high-strength grouting material is poured in the gap between the first precast column and the reinforced concrete side wall and the gap between the second precast column and the reinforced concrete side wall, and the second high-strength grouting material covers the distance adjustment pad and is flush with the top surface of the reinforced concrete side wall; the wedge blocks are removed after the second high-strength grouting material solidifies.

[0017] A construction method of a double-column structure based on a prefabricated cup-mouth foundation comprises the following steps:

[0018] S1, installation of the prefabricated cup-shaped foundation, placing the prefabricated cup-shaped foundation at the designated position of the foundation body, and pouring the first cast-in-place concrete until the first cast-in-place concrete solidifies, wherein the surface of the first cast-in-place concrete in the second channel is flush with the upper edge of the partition, and the surface of the first cast-in-place concrete in the first channel is flush with the lower edge of the partition;

[0019] S2, hoisting the first precast column, placing the first precast column hoist in the first channel and positioning the lower end of the first precast column in the space enclosed by the partition and the reinforced concrete side wall, with the temporary support member facing the second channel and the overlapping portion of the temporary support member overlapping the top surface of the reinforced concrete side wall, adjusting the verticality and offset position of the first precast column through the slot between the reinforced concrete side wall and the force transfer plate and the gap between the reinforced concrete side wall and the first precast column by means of a wedge block, then pouring the first high-strength grouting material between the first precast column and the partition and between the first precast column and the reinforced concrete side wall, and removing the wedge block and the temporary support member after the first high-strength grouting material solidifies;

[0020] S3, hoist the second precast column, place the second precast column hoist in the second channel, the lower end of the second precast column is located in the space enclosed by the reinforced concrete side wall and the first precast column, and the distance adjustment pad is in contact with the first precast column; after adjusting the verticality and offset position of the second precast column between the reinforced concrete side wall and the second precast column and between the reinforced concrete side wall and the first precast column by means of wedge blocks, pour the second high-strength grouting material in the gap between the first precast column and the reinforced concrete side wall and the gap between the second precast column and the reinforced concrete side wall, and the second high-strength grouting material covers the distance adjustment pad and is flush with the top surface of the reinforced concrete side wall; remove the wedge blocks after the second high-strength grouting material solidifies.

[0021] Compared with the previous technology, the beneficial effects of the present invention are:

[0022] 1. The present invention optimizes the design of the prefabricated cup-shaped foundation, the first prefabricated column and the corresponding accessories of the second prefabricated column and the construction method, so as to achieve the purpose of sharing one prefabricated cup-shaped foundation by the two prefabricated columns while ensuring that the distance between the two prefabricated columns is controllable, so that the prefabricated assembly design with the prefabricated cup-shaped foundation can be fully applicable to super-long buildings.

[0023] 2. The present invention arranges a partition in the prefabricated cup-mouth foundation, and subsequently forms a height difference of concrete on both sides of the partition after the initial cast-in-place concrete is cast. The low-position concrete area provides an operating space for fixing the first prefabricated column, and the fixing of the first prefabricated column forms an operating space for the subsequent fixing of the second prefabricated column, thereby ultimately achieving the purpose of two prefabricated columns sharing one prefabricated cup-mouth foundation, and at the same time solving the problem of the interval between the first prefabricated column and the second prefabricated column not being too large.

[0024] 3. The present invention sets a temporary support on the first prefabricated column, so that during the hoisting process of the first prefabricated column, the temporary support can be used to adjust the horizontal displacement and verticality of the first prefabricated column under the action of the wedge block and the prefabricated cup foundation, thereby ensuring the installation accuracy of the first prefabricated column.

[0025] 4. By installing a distance-adjusting pad with customizable thickness on the second prefabricated column, it is ensured that during the installation of the second prefabricated column, the distance between adjacent prefabricated columns is controlled by overlapping the distance-adjusting pad with the first prefabricated column. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the prefabricated cup mouth foundation;

[0027] Figure 2 is a structural schematic diagram of the first prefabricated column;

[0028] Figure 3 is a schematic diagram of the structure of a temporary support;

[0029] Figure 4 is a structural schematic diagram of the second prefabricated column;

[0030] Figure 5 This is a structural schematic diagram of the prefabricated cup-shaped foundation after the first cast-in-place concrete pouring and connection with the foundation body;

[0031] Figure 6 for Figure 5 lateral cross-sectional view;

[0032] Figure 7 For Figure 5 A schematic diagram of the structure in which the first prefabricated column is placed on the foundation;

[0033] Figure 8 for Figure 7 lateral cross-sectional view;

[0034] Fig. 9 For Figure 7 Schematic diagram of the structure where a wedge is inserted into the foundation and the first high-strength grouting material is poured;

[0035] Fig.10 for Fig. 9 lateral cross-sectional view;

[0036] Fig.11 For Fig. 9 Structural diagram of removing temporary supports from the foundation;

[0037] Fig.12 for Fig.11 lateral cross-sectional view;

[0038] Fig.13 For Fig.11 Structural diagram of placing the second prefabricated column on the foundation;

[0039] Fig.14 for Fig.13 lateral cross-sectional view;

[0040] Fig.15 For Fig.13 Schematic diagram of the structure of inserting wedge blocks into the foundation;

[0041] Fig.16 for Fig.15 lateral cross-sectional view;

[0042] Fig.17 For Fig.15 Structural schematic diagram of the second high-strength grouting material pouring on the foundation;

[0043] Fig.18 for Fig.17 lateral cross-sectional view;

[0044] Fig.19 For Fig.17 Schematic diagram of the structure of removing the wedge-shaped blocks from the foundation;

[0045] Fig. 20 for Fig.19 lateral cross-sectional view;

[0046] Fig.21 It is a structural schematic diagram of the second embodiment of the prefabricated cup mouth foundation.

[0047] Explanation of reference numbers: 1 prefabricated cup-shaped foundation, 11 reinforced concrete side wall, 12 extended steel bar, 13 partition, 131 folded plate, 132 plate body, 133 bolt, 14 first channel, 15 second channel, 2 first prefabricated column, 3 temporary support, 31 horizontal support frame, 32 lap joint, 33 slot, 34 force transmission plate, 35 mounting plate, 36 horizontal support plate, 37 connecting plate, 38 supporting reinforcement rib, 4 second prefabricated column, 5 distance adjustment pad, 6 wedge block, 71 first cast-in-place concrete, 72 first high-strength grouting material, 73 second high-strength grouting material. DETAILED DESCRIPTION

[0048] The present invention is described in detail below in conjunction with the accompanying drawings:

[0049] like Figure 1-20 Shown: Double column structure based on prefabricated cup mouth foundation, including

[0050] The prefabricated cup-mouth foundation 1 is a prefabricated foundation having four reinforced concrete side walls 11 and a vertical through-channel in the middle, which is integrally cast. The bottom of the reinforced concrete side wall 11 is provided with an extended steel bar 12 extending downward. A partition 13 is provided in the channel to divide the channel into a first channel 14 and a second channel 15. The horizontal height of the upper edge of the partition 13 is lower than the horizontal height of the upper edge of the prefabricated cup-mouth foundation 1.

[0051] like Figure 2 , 3As shown: the first prefabricated column 2 is installed in the first channel 14, and a temporary support member 3 is provided on the side of the first prefabricated column 2. The main body of the temporary support member 3 is a horizontal support frame 31. The inner side of the horizontal support frame is connected to the side wall of the first prefabricated column 2. The outer side of the horizontal support frame 31 is provided with an outwardly extending overlap portion 32. A slot hole 33 adjacent to the overlap portion 32 is also opened on the horizontal support frame 31, and a force transmission plate 34 is installed on the inner edge of the slot hole 33;

[0052] like Figure 4 As shown: the second prefabricated column 4 is installed in the second channel 15, and a distance-adjusting spacer 5 is installed on the side of the second prefabricated column 4;

[0053] The prefabricated cup-shaped foundation 1 is fixed on the foundation body by pouring the first cast-in-place concrete 71; wherein the first cast-in-place concrete 71 in the channel has a height difference, the surface of the first cast-in-place concrete 71 in the second channel 15 is flush with the upper edge of the partition 13, and the surface of the first cast-in-place concrete 71 in the first channel 14 is flush with the lower edge of the partition 13;

[0054] The first precast column 2 is hoisted and placed in the first channel 14, and the lower end of the first precast column 2 is located in the space enclosed by the partition 13 and the reinforced concrete side wall 11, the temporary support member 3 faces the second channel 15, and the overlapping portion 32 of the temporary support member 3 overlaps the top surface of the reinforced concrete side wall 11. After the slot 33 between the reinforced concrete side wall 11 and the force transmission plate 34 and the gap between the reinforced concrete side wall 11 and the first precast column 2 are adjusted by the wedge block 6 to adjust the verticality and offset position of the first precast column 2, the first high-strength grouting material 72 is poured between the first precast column 2 and the partition 13 and between the first precast column 2 and the reinforced concrete side wall 11. After the first high-strength grouting material 72 is solidified, the wedge block 6 and the temporary support member 3 are removed;

[0055] The second precast column 4 is hoisted and placed in the second channel 15, the lower end of the second precast column 4 is located in the space enclosed by the reinforced concrete side wall 11 and the first precast column 2, and the distance adjustment pad 5 is in contact with the first precast column 2. After the verticality and offset position of the second precast column 4 are adjusted by the wedge block 6 between the reinforced concrete side wall 11 and the second precast column 4 and between the reinforced concrete side wall 11 and the first precast column 2, the second high-strength grouting material 73 is poured in the gap between the first precast column 2 and the reinforced concrete side wall 11 and the gap between the second precast column 4 and the reinforced concrete side wall 11, and the second high-strength grouting material 73 covers the distance adjustment pad 5 and is flush with the top surface of the reinforced concrete side wall 11; the wedge block 6 is removed after the second high-strength grouting material 73 solidifies.

[0056] The thickness of the reinforced concrete side wall of the prefabricated cup-mouth foundation here is comparable to the thickness of the existing prefabricated cup-mouth foundation side wall, which is about 20 cm. The design point of the prefabricated cup-mouth foundation is the addition of a partition 13. This partition has two main characteristics. First, its thickness is relatively thin, which mainly realizes spatial division, dividing the channel into a first channel 14 and a second channel 15; the second characteristic is mainly that the horizontal height of the upper edge of the partition 13 is lower than the horizontal height of the upper edge of the prefabricated cup-mouth foundation 1. The partition here is not essentially used to support the precast column, but mainly to separate the first cast-in-place concrete 71; after the first cast-in-place concrete 71 is poured, the surface of the first cast-in-place concrete 71 located in the second channel 15 is flush with the upper edge of the partition 13, and the surface of the first cast-in-place concrete 71 located in the first channel 14 is flush with the lower edge of the partition 13; in this way, a concrete side wall of the same height as the partition is formed in the second channel 15. This side wall formed by cast-in-place has sufficient thickness. After the first precast column is poured and solidified by the first high-strength grouting material, when the temporary support 3 and the wedge block 6 are removed, the cast-in-place side wall can cooperate with the reinforced concrete side wall 11 to fix the first precast column and prevent the first precast column from tipping over. After the first precast column is fixed, the second precast column can be installed at this time. The second precast column itself adopts the traditional installation method. The only difference is that the side of the second precast column has an additional distance adjustment pad 5. The distance adjustment pad 5 is overlapped with the first precast column to confirm the distance between the first precast column and the second precast column. In addition, a wedge block 6 needs to be inserted between the first precast column and the reinforced concrete side wall. Generally speaking, the wedge block 6 adopted here is a wedge block 6 made of steel.

[0057] The horizontal support frame 31 includes a mounting plate 35, a horizontal support plate 36, a connecting piece 37 and a supporting reinforcement rib 38. The mounting plate 35 is mounted on the side wall of the first prefabricated column 2. The two horizontal support plates 36 are arranged in parallel and the inner ends are connected to the mounting plate 35. A plurality of connecting pieces 37 are sequentially connected between the two horizontal support plates 36 from the outside to the inside. The supporting reinforcement rib 38 is mounted on the bottom of the horizontal support plate 36 and the inner end of the supporting reinforcement rib 38 is connected to the mounting plate 35. The outer end of the supporting reinforcement rib 38 does not extend to the outer end of the horizontal support plate 36, so that a section of the outer end of the horizontal support plate 36 forms the overlapping portion 32. The outermost connecting piece 37 is close to the overlapping portion 32, so that the slot 33 is formed between the outermost connecting piece 37 and the overlapping portion 32. The upper edge of the force transmission plate 34 is connected to the outer side of the connecting piece 37 and the two ends are connected to the supporting reinforcement rib 38.

[0058] Here, a specific structure of a temporary support member 3 is given. The outer end of the support reinforcement rib 38 does not extend to the outer end of the horizontal support plate 36, so that a section of the outer end of the horizontal support plate 36 is left to form a lap joint 32; the outermost connecting piece 37 is close to the lap joint 32, so that the slot 33 is formed between the outermost connecting piece 37 and the lap joint 32; the slot 33 is mainly considered for the insertion of the wedge block 6. Specifically, when the lap joint 32 is placed on the top surface of the corresponding reinforced concrete side wall, there is a certain gap, i.e., the slot, between the outermost connecting piece 37 and the reinforced concrete side wall. By inserting the wedge block 6 in the gap, the force transmitted by the wedge block 6 can act on the first prefabricated column, thereby adjusting the verticality and horizontal displacement of the first prefabricated column. The added force transmission plate 34 is to ensure that the force of the wedge block 6 can be better transmitted. It should be noted that the mounting plate 35 of the temporary support member 3 is provided with an opening, and the temporary support member 3 can be installed on the first prefabricated column or removed from the first prefabricated column by bolts.

[0059] According to the needs, the partition 13 here is derived into the following two embodiments according to different installation methods:

[0060] Example 1

[0061] The partition 13 is a plate-like structure integrally cast with the prefabricated cup mouth base 1 .

[0062] Example 2

[0063] like Fig.21 As shown, the partition 13 is mainly a plate body 132, and folding plates 131 are provided on both sides of the plate body 132, wherein the through holes on the folding plates 131 are matched with bolts 133 to be fixed in the channel.

[0064] like Figure 5-20 As shown: The construction method of the double-column structure based on the prefabricated cup-mouth foundation described in the present invention is as follows:

[0065] The steps include:

[0066] S1, installation of the prefabricated cup-mouth foundation 1, placing the prefabricated cup-mouth foundation 1 at the designated position of the foundation body, and pouring the first cast-in-place concrete 71 until the first cast-in-place concrete 71 solidifies, wherein the surface of the first cast-in-place concrete 71 in the second channel 15 is flush with the upper edge of the partition 13, and the surface of the first cast-in-place concrete 71 in the first channel 14 is flush with the lower edge of the partition 13 (such as Figure 5 , 6 shown);

[0067] S2, hoist the first precast column 2, place the first precast column 2 hoist in the first channel 14 and the lower end of the first precast column 2 is located in the space enclosed by the partition 13 and the reinforced concrete side wall 11, the temporary support member 3 faces the second channel 15 and the overlapping portion 32 of the temporary support member 3 overlaps the top surface of the reinforced concrete side wall 11, and the slot 33 between the reinforced concrete side wall 11 and the force transmission plate 34 and the gap between the reinforced concrete side wall 11 and the first precast column 2 are adjusted by the wedge block 6 to adjust the verticality and offset position of the first precast column 2, and then pour the first high-strength grouting material 72 between the first precast column 2 and the partition 13 and between the first precast column 2 and the reinforced concrete side wall 11. After the first high-strength grouting material 72 solidifies, remove the wedge block 6 and the temporary support member 3 (such as Figure 7-10 shown);

[0068] S3, hoist the second precast column 4, and place the second precast column 4 hoisting device in the second channel 15, so that the lower end of the second precast column 4 is located in the space enclosed by the reinforced concrete side wall 11 and the first precast column 2, and the distance adjustment pad 5 is in contact with the first precast column 2; after adjusting the verticality and offset position of the second precast column 4 between the reinforced concrete side wall 11 and the second precast column 4 and between the reinforced concrete side wall 11 and the first precast column 2 by the wedge block 6, pour the second high-strength grouting material 73 in the gap between the first precast column 2 and the reinforced concrete side wall 11 and the gap between the second precast column 4 and the reinforced concrete side wall 11, and the second high-strength grouting material 73 covers the distance adjustment pad 5 and is flush with the top surface of the reinforced concrete side wall 11; after the second high-strength grouting material 73 solidifies, remove the wedge block 6 (such as Figure 11-20 as shown).

[0069] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Double column structure based on prefabricated cup mouth foundation, characterized by: include The prefabricated cup-mouth foundation (1) is a prefabricated foundation having four reinforced concrete side walls (11) formed in one piece by pouring and having an upper and lower through-channel in the middle, wherein the bottom of the reinforced concrete side walls (11) is provided with an extended steel bar (12) extending downward; a partition (13) is provided in the channel to divide the channel into a first channel (14) and a second channel (15), and the horizontal height of the upper edge of the partition (13) is lower than the horizontal height of the upper edge of the prefabricated cup-mouth foundation (1); A first prefabricated column (2) is installed in the first channel (14), and a temporary support member (3) is provided on the side of the first prefabricated column (2), wherein the main body of the temporary support member (3) is a horizontal support frame (31), the inner side of the horizontal support frame is connected to the side wall of the first prefabricated column (2), and the outer side of the horizontal support frame (31) is provided with an outwardly extending overlap portion (32), and a slot hole (33) adjacent to the overlap portion (32) is also provided on the horizontal support frame (31), and a force transmission plate (34) is installed on the inner edge of the slot hole (33); A second prefabricated column (4) is installed in the second channel (15), and a distance-adjusting pad (5) is installed on the side of the second prefabricated column (4); The prefabricated cup-shaped foundation (1) is cast and fixed on the foundation body by first cast-in-place concrete (71); wherein the first cast-in-place concrete (71) in the channel has a height difference, the surface of the first cast-in-place concrete (71) in the second channel (15) is flush with the upper edge of the partition (13), and the surface of the first cast-in-place concrete (71) in the first channel (14) is flush with the lower edge of the partition (13); The first precast column (2) is hoisted and placed in the first channel (14), and the lower end of the first precast column (2) is located in the space enclosed by the partition (13) and the reinforced concrete side wall (11), the temporary support member (3) faces the direction of the second channel (15), and the overlapping portion (32) of the temporary support member (3) overlaps the top surface of the reinforced concrete side wall (11), and the slot hole (33) between the reinforced concrete side wall (11) and the force transmission plate (34) and the gap between the reinforced concrete side wall (11) and the first precast column (2) are adjusted by the wedge block (6) to adjust the verticality and offset position of the first precast column (2), and then the first high-strength grouting material (72) is poured between the first precast column (2) and the partition (13) and between the first precast column (2) and the reinforced concrete side wall (11), and after the first high-strength grouting material (72) solidifies, the wedge block (6) and the temporary support member (3) are removed; The second precast column (4) is hoisted and placed in the second passage (15), the lower end of the second precast column (4) is located in the space enclosed by the reinforced concrete side wall (11) and the first precast column (2), and the distance adjustment pad (5) is in contact with the first precast column (2). After the verticality and offset position of the second precast column (4) are adjusted between the reinforced concrete side wall (11) and the second precast column (4) and between the reinforced concrete side wall (11) and the first precast column (2) by means of a wedge block (6), a second high-strength grouting material (73) is poured in the gap between the first precast column (2) and the reinforced concrete side wall (11) and the gap between the second precast column (4) and the reinforced concrete side wall (11), and the second high-strength grouting material (73) covers the distance adjustment pad (5) and is flush with the top surface of the reinforced concrete side wall (11); and the wedge block (6) is removed after the second high-strength grouting material (73) solidifies.

2. The double-column structure based on the prefabricated cup mouth foundation according to claim 1 is characterized in that: The horizontal support frame (31) comprises a mounting plate (35), a horizontal support plate (36), a connecting piece (37) and a supporting reinforcement rib (38); the mounting plate (35) is mounted on the side wall surface of the first prefabricated column (2); two horizontal support plates (36) are arranged in parallel and the inner ends are connected to the mounting plate (35); a plurality of connecting pieces (37) are sequentially connected between the two horizontal support plates (36) from the outside to the inside; the supporting reinforcement rib (38) is mounted on the bottom of the horizontal support plate (36) and the inner ends of the supporting reinforcement rib (38) are connected to the mounting plate (35); connected to the mounting plate (35); wherein the outer end of the support reinforcement rib (38) does not extend to the outer end of the horizontal support plate (36), so that a section of the outer end of the horizontal support plate (36) forms the overlapping portion (32), and the outermost connecting piece (37) is close to the overlapping portion (32), so that the slot (33) is formed between the outermost connecting piece (37) and the overlapping portion (32), and the upper edge of the force transmission plate (34) is connected to the outer side of the connecting piece (37) and the two ends are connected to the support reinforcement rib (38).

3. The double-column structure based on the prefabricated cup mouth foundation according to claim 1, characterized in that: The partition (13) is a plate-like structure integrally cast with the prefabricated cup mouth base (1).

4. The double-column structure based on the prefabricated cup mouth foundation according to claim 1, characterized in that: The partition (13) is mainly a plate body (132), and folding plates (131) are provided on both sides of the plate body (132), wherein through holes on the folding plates (131) are matched with bolts (133) to be fixed in the channel.

5. A construction method for a double-column structure based on a prefabricated cup-shaped foundation according to any one of claims 1 to 4, characterized in that: The steps include: S1, installation of the prefabricated cup-shaped foundation (1), placing the prefabricated cup-shaped foundation (1) at a designated position of the foundation body, and pouring the first cast-in-place concrete (71) until the first cast-in-place concrete (71) solidifies, wherein the surface of the first cast-in-place concrete (71) in the second channel (15) is flush with the upper edge of the partition (13), and the surface of the first cast-in-place concrete (71) in the first channel (14) is flush with the lower edge of the partition (13); S2, hoisting the first precast column (2), placing the first precast column (2) hoisting device in the first channel (14) and positioning the lower end of the first precast column (2) in the space enclosed by the partition (13) and the reinforced concrete side wall (11), with the temporary support member (3) facing the second channel (15) and the overlapping portion (32) of the temporary support member (3) overlapping the top surface of the reinforced concrete side wall (11), adjusting the verticality and offset position of the first precast column (2) by means of a wedge block (6) in the slot (33) between the reinforced concrete side wall (11) and the force transmission plate (34) and in the gap between the reinforced concrete side wall (11) and the first precast column (2), then pouring the first high-strength grouting material (72) between the first precast column (2) and the partition (13) and between the first precast column (2) and the reinforced concrete side wall (11), and after the first high-strength grouting material (72) solidifies, removing the wedge block (6) and the temporary support member (3); S3, hoisting the second prefabricated column (4), placing the second prefabricated column (4) hoisting device in the second channel (15), with the lower end of the second prefabricated column (4) located in the space enclosed by the reinforced concrete side wall (11) and the first prefabricated column (2), and the distance adjustment pad (5) abutting against the first prefabricated column (2); After the verticality and offset position of the second precast column (4) are adjusted by means of a wedge block (6) between the reinforced concrete side wall (11) and the second precast column (4) and between the reinforced concrete side wall (11) and the first precast column (2), a second high-strength grouting material (73) is poured in the gap between the first precast column (2) and the reinforced concrete side wall (11) and in the gap between the second precast column (4) and the reinforced concrete side wall (11), and the second high-strength grouting material (73) covers the spacing pad (5) and is flush with the top surface of the reinforced concrete side wall (11); and the wedge block (6) is removed after the second high-strength grouting material (73) solidifies.

Images