CN108425375A - A kind of basis prefabricated post and its connection structure and its construction method - Google Patents

Abstract

The invention discloses a foundation prefabricated column. The key points of the technical scheme include a column body and anchor bolts. The anchor bolts are vertically poured in the column body. The support foot integrally formed by the rod part, the upper part of the rod part protrudes from the cylinder and is placed above the cylinder; the invention also discloses a method for installing the foundation prefabricated column, and the main points of the technical solution include the following installation steps: step a, Dig a foundation pit, pour a concrete cushion at the bottom of the foundation pit and arrange steel mesh on the cushion; step b, place the foundation prefabricated column vertically in the foundation pit; step c, adjust the position of the foundation prefabricated column so that the rod of the anchor bolt The bottom of the foundation pit is kept vertical; step d, concrete is poured at the bottom of the foundation pit, so that the concrete covers the lower part of the main body; step e, the foundation pit is backfilled after the concrete at the bottom of the foundation pit is solidified; the deviation of the position of the anchor bolts during the foundation pouring process is avoided Purpose.

Description

A foundation prefabricated column and its connecting structure and construction method

technical field

The invention relates to a building foundation, in particular to a foundation prefabricated column and its connecting structure and construction method.

Background technique

The foundation is the structural component that transfers the various actions the structure bears to the foundation. When the top of the foundation is connected to the steel structure column, it is necessary to pre-embed the anchor bolts in the foundation. In the common foundation construction process, it is necessary to vertically fix the anchor bolts in the foundation pit first, then bind the foundation steel bars, install the formwork, and finally pour concrete. When the concrete is poured, the anchor bolts are easy to shift and tilt under the interference of external force, which leads to the position deviation of the exposed screw on the top exceeding the specification requirements, which makes the installation of the steel structure column difficult and seriously affects the connection with the steel structure column. Connection quality. Even if adjustments are made in the later stage, the bearing capacity requirements of the original design cannot be met, and the adjustment is laborious and time-consuming, which will also affect the construction period.

Contents of the invention

The purpose of the present invention is to provide a foundation prefabricated column, which can reduce the deviation of the position of the anchor bolts during the foundation pouring process.

The above-mentioned technical purpose of the present invention is achieved through the following technical solutions: a prefabricated foundation column, comprising a column body and anchor bolts, the anchor bolts are vertically poured in the column body, and the anchor bolts include rods and The support feet are perpendicular to the rod, and the upper part of the rod protrudes from the cylinder and is placed above the cylinder.

The second object of the present invention is to provide a connection structure of foundation prefabricated columns, the position of anchor bolts of this structure is more accurate, and the installation quality is high.

The above-mentioned technical purpose of the present invention is achieved through the following technical solutions: a prefabricated foundation column, comprising a column body and anchor bolts, the anchor bolts are vertically poured in the column body, and the anchor bolts include rods and The support feet are perpendicular to the pole part, the upper part of the pole protrudes from the cylinder and is placed above the cylinder, and the bottom of the cylinder is buried in the cast-in-place foundation concrete.

By adopting the above technical scheme, the anchor bolts will not be shifted and tilted during the concrete pouring process, and deviations will be avoided.

The third object of the present invention is to provide a construction method of the foundation structure, which has simple installation steps and high construction efficiency.

Above-mentioned technical purpose of the present invention is achieved through the following technical solutions:

A method for installing a foundation prefabricated column, comprising the following installation steps:

Step a, digging a foundation pit, and pouring a concrete cushion at the bottom of the foundation pit;

Step b, placing the foundation prefabricated column vertically in the foundation pit;

Step c. Adjust the position of the foundation prefabricated column so that the rods of the anchor bolts are kept vertical;

Step d, pouring concrete at the bottom of the foundation pit, so that the concrete covers the lower part of the main body;

In step e, the foundation pit is backfilled after the concrete at the bottom of the foundation pit is solidified.

By adopting the above technical scheme, the anchor bolts will not be shifted and tilted during the concrete pouring process, avoiding deviations, and no side forms need to be installed, so the construction is fast and efficient.

In summary, the present invention has the following technical effects:

1. Precast the foundation bolts in the foundation prefabricated column. When carrying out foundation construction, place the foundation prefabricated column vertically in the foundation pit and pour concrete at the bottom of the foundation pit. Since the foundation bolts are fixed in the column, the concrete pouring below It can avoid the offset and inclination deviation of the anchor bolts, and at the same time, it is easy to construct the foundation through the foundation prefabricated column, which can save the construction period;

2. The lower part of the anchor bolts is poured into the column to meet the stress requirements of the anchor bolts, and at the same time reduce the amount of anchor bolts and save costs; the supporting steel bars at the bottom of the column can be used as support for the pillars, which is easy to adjust. At the same time, the supporting steel bars after pouring concrete in the foundation pit can strengthen the force bearing capacity of the foundation. At the same time, due to the high cost of anchor bolts, this method can save the amount of anchor bolts and save costs;

3. The foundation structure is connected with the prefabricated ground beam/precast concrete column as a whole, which has better mechanical and seismic performance;

4. Using this method, there is no need to install formwork, the construction is fast and efficient, and the construction period is saved.

Description of drawings

Figure 1 is a schematic diagram of the foundation prefabricated column structure;

Figure 2 is a schematic diagram of the installation of the foundation prefabricated column;

Figure 3 is a schematic cross-sectional view of the foundation prefabricated column;

Figure 4 is a schematic diagram of the structure of the foundation prefabricated column anchor bolt feet located in the column;

Fig. 5 is a schematic diagram of a foundation prefabricated column provided with internal reinforcement;

Fig. 6 is a schematic diagram of the foundation prefabricated column with the legs outside the column;

Fig. 7 is a schematic diagram of the installation of the foundation prefabricated column provided with positioning holes;

Fig. 8 is a structural schematic diagram of a prefabricated foundation column provided with positioning holes;

Fig. 9 is a structural schematic diagram of the foundation prefabricated column in which the positioning hole is a through hole;

Fig. 10 is a structural schematic diagram of pouring concrete for the first time in the through hole;

Fig. 11 is a structural schematic diagram of pouring concrete for the second time in the through hole and wrapping the bolts;

Fig. 12 is a schematic diagram of the foundation prefabricated column structure with column connecting ribs arranged on the side;

Fig. 13 is a schematic diagram of the connection between the foundation prefabricated column and the prefabricated ground beam with the column connecting bars arranged on the side;

Fig. 14 is a schematic structural view of the prefabricated column in which the connecting rib of the column is provided with an enlarged head;

Fig. 15 is a schematic diagram of the connection between the column connecting rib with the enlarged head and the prefabricated ground beam sleeve;

Fig. 16 is a schematic diagram of the prefabricated foundation column structure with piercing holes arranged on the side;

Fig. 17 is a structural schematic diagram of connecting the ground beams on both sides after the perforated bars pass through the piercing holes;

Fig. 18 is a schematic structural view of connecting with a sleeve after the perforated rib is provided with an expanding head;

Fig. 19 is a schematic structural view of directly connecting the connecting bars of the ground beams with the expansion head with a sleeve;

Fig. 20 is a schematic diagram of the interconnection structure of high prefabricated ground beams on both sides;

Fig. 21 is the construction step 1 of interconnecting high prefabricated ground beams on both sides;

Figure 22 is the second construction step of interconnecting high prefabricated ground beams on both sides;

Figure 23 is the third construction step of interconnecting high prefabricated ground beams on both sides;

Fig. 24 is the fourth construction step of interconnecting high prefabricated ground beams on both sides;

Fig. 25 is a schematic diagram of the structure of a prefabricated foundation column that becomes an enlarged head after the screw on the rod is screwed with the nut;

Fig. 26 is a schematic diagram of the connection structure between the nut expansion head and the connecting rib sleeve at the bottom of the precast concrete column;

Fig. 27 is a structural schematic diagram of a prefabricated foundation column with an enlarged head arranged at the end of the rod;

Fig. 28 is a schematic diagram of the connection structure between the expansion head and the connecting rib sleeve at the bottom of the precast concrete column;

Fig. 29 is a schematic diagram of a prefabricated foundation column arranged adjacent to the bottom of the foundation;

Fig. 30 is a schematic diagram of the connection structure between the prefabricated foundation column and the precast concrete column sleeve;

Fig. 31 is a structural schematic diagram of installing vertical reinforcement in the through hole of the prefabricated foundation column;

Fig. 32 is a schematic diagram of the connection structure between the prefabricated foundation column and the hollow precast concrete column;

Fig. 33 is a schematic diagram of the connection structure between prefabricated foundation columns, hollow precast concrete columns and prefabricated ground beams;

Fig. 34 is a schematic structural view of the cylinder body in the necked type steel bar connecting sleeve;

Figure 35 is a schematic view of the end face of the necking;

Figure 36 is a schematic diagram of the cooperation of the sleeve and the connecting steel bar;

Fig. 37 is a schematic diagram of the connection relationship between the necked steel bar connection sleeve and the prefabricated column;

Figure 38 is a schematic structural view of a split cylinder;

Fig. 39 is a schematic diagram of the connection relationship between the split cylinder body and the prefabricated column;

Fig. 40 is the structural representation that sleeve is connected with two reinforcing bars of vertical state;

Fig. 41 is a schematic structural view of a clip-type sleeve extending outward;

Fig. 42 is a schematic diagram of the assembly of the clamp-type sleeve extending outward and the connecting steel bar.

Reference signs: 1, column; 11, column connecting rib; 12, piercing hole; 13, perforated rib; 14, post-cast filling belt; 2, anchor bolt; 21, rod; 22, support foot; 3 , supporting steel bar; 4, positioning hole; 41, reinforcing steel bar; 42, through hole; 5, foundation pit; 51, concrete cushion; 52, first pouring area; 53, second pouring area; 6, cylinder; 61 , necking; 611, transitional conical surface; 62, grouting hole; 63, connecting plate; 631, connecting hole; 64, blocking element; 65, clamping block; 651, clamping hole; 66, shrapnel; 7, H-shaped steel; 71, steel plate; 72, shear pile; 8, prefabricated ground beam; 81, ground beam connecting bar; 9, precast concrete column; 91, bottom connecting bar; 92, hollow; 101, sleeve; steel bar; 103, expanding head.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings. Wherein the same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper", "lower", "bottom" and "top" used in the following description refer to the Directions, the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.

When constructing the building foundation, it is first necessary to vertically fix the anchor bolts 2 in the foundation pit 5, and then carry out formwork and pour concrete to form the foundation. The position of the bolt 2 deviates, which cannot meet the requirements of the building. The adjustment in the later stage is time-consuming and laborious, and it is easy to cause the anchor bolt 2 to be unstable. In order to solve the above problems, a foundation prefabrication that can avoid the inclination and offset of the anchor bolt 2 is designed. Column, its specific structure is as follows:

Embodiment one:

A basic prefabricated column, as shown in Figure 1, includes a column body 1 and anchor bolts 2, and the anchor bolts 2 are poured inside the column body 1, including a vertically arranged rod portion 21 and a foot 22 perpendicular to the rod portion 21 , The rod part 21 and the leg 22 are integrally formed, the upper end of the rod part 21 protrudes from the cylinder 1 and is placed above the cylinder 1, and the top part of the rod part 21 may be a bolt head. The rod portion 21 of the anchor bolt 2 protrudes downwards from the bottom surface of the column body 1 , and the leg 22 is located outside the column body 1 .

As shown in Figure 2, during installation, a cushion layer is poured at the bottom of the foundation pit 5 and a reinforcement mesh is arranged, then the foundation prefabricated column is hoisted into the foundation pit 5, after the position and height are adjusted, the support feet 22 are connected and fixed with the reinforcement mesh, and finally Concrete pouring is performed at the bottom of the foundation pit 5, so that the poured concrete covers the bottom of the column 1, and the foundation pit 5 is backfilled after the concrete is solidified to complete the construction of the foundation.

Since the anchor bolts 2 are pre-buried inside the column body 1 in advance, the relative positions of the rod portion 21 and the bolt head have been fixed during prefabrication. Compared with binding the anchor bolts 2 on site, the position accuracy is higher. Moreover, after the foundation prefabricated column is installed and fixed, the structure is stable, and the external force in the pouring process is difficult to affect its position. Therefore, after the entire foundation construction is completed, the position deviation of the anchor bolt 2 is well controlled and the precision is high, thereby improving The quality of the basic construction.

In addition, during the construction of the original foundation, it was necessary to install formwork to pour concrete, and because the shape and structure of the foundation is that the lower part is large and the upper part is small, the formwork installation is complicated and time-consuming. And use this method, do not need to install formwork, as long as pour concrete into foundation pit 5 bottoms, make it wrap the bottom of column body 1 and get final product. Therefore, this method also has the advantages of fast and efficient construction and can save construction period.

As shown in FIG. 3 , the cylinder 1 can be in the form of a prism or a cylinder, and there are multiple anchor bolts 2 arranged around the axis of the cylinder 1 as the center.

When the designed base height is relatively large, the height of the column 1 needs to be increased accordingly, but because the material of the anchor bolt 2 is more expensive than ordinary steel bars, the setting of the legs 22 outside the column 1 will cause waste of materials. Therefore, as shown in FIG. 4 , the lower portion of the rod portion 21 and the legs 22 are both disposed inside the column body 1 . Preferably, the leg 22 is set inwards. The lower end of the column body 1 is fixedly provided with a number of support bars 3, the support bars 3 are vertically arranged, and the upper ends thereof are poured in the column body 1, and the lower ends of each support bar 3 are kept flush. The supporting steel bar 3 can be a straight bar, or as shown in FIG. 4 , the bottom of the supporting steel bar 3 can be turned outward or inward, so as to facilitate support and fixation.

The supporting reinforcement 3 can also be used as the internal vertical stress reinforcement of the column 1 . As shown in Figure 5, the column body 1 is a reinforced concrete structure, and vertically stressed steel bars and stirrups are arranged inside. There are two types of stirrups. , a kind of anchor bolt 2 hoops.

As shown in Figure 6, when the feet 22 of the anchor bolts 2 are located outside the column 1, the anchor bolts 2 can be used as the vertical stress reinforcement of the column 1, and the stirrups can be arranged around the anchor bolts 2 .

When the feet 22 of the anchor bolts 2 are located outside the column body 1, they can be turned up or down. When it is turned out, the force-bearing structure is better, and it is more convenient to process and transport the foundation prefabricated column when it is turned inside.

Embodiment two:

Referring back to FIG. 2 , the top of the foundation is threadedly connected with the steel plate 71 fixed at the bottom of the H-shaped steel 7 through the anchor bolts 2 to achieve the purpose of fixing the H-shaped steel 7 . Since the anchor bolts 2 are prone to breakage when subjected to a relatively large shear stress, as shown in Figure 7, a shear pile 72 is welded to the lower end of the steel plate 71 fixed with the H-shaped steel 7, and the shear pile 72 Set perpendicular to the steel plate 71. In the prior art, when the foundation is poured, a mold will be placed at the center of the upper end to pour out the positioning holes 4 corresponding to the shear piles 72. When the H-shaped steel 7 is installed, the shear piles 72 will be inserted into the positioning holes 4, and finally the steel plate Concrete is poured in the gap between 71 and the foundation and in the positioning hole 4 to achieve the purpose of bearing shear stress.

As shown in Fig. 8 and Fig. 9, in order to cooperate with the shear pile 72 conveniently, the central position of the upper end of the column 1 in the present invention is preset with a positioning hole 4, and the positioning hole 4 can be provided with two forms of counterbore and through hole 42 , wherein the counterbore can be directly used to cooperate with the shear pile 72, and the through hole 42 can also be used for pouring concrete when pouring the bottom of the foundation pit 5 except that it can cooperate with the shear pile 72.

As shown in Fig. 10, after pouring concrete in the through hole 42, it is integrated with the foundation concrete at the bottom, which strengthens the connection between the foundation prefabricated column and the cast-in-place concrete structure at the bottom, and enhances the mechanical performance of the foundation. Vertical reinforcement bars 41 may also be arranged in the through holes 42 . In addition, it should be pointed out that the concrete in the through hole 42 is divided into two pourings. During the first pouring, a part that matches the shear pile 72 is reserved; after the H-shaped steel 7 is installed, the steel plate 71 and the column 1 A post-pouring filling belt 14 is set between the tops for secondary pouring.

As shown in FIG. 11 , when pouring concrete for the second time, the steel plate 71 and fixing bolts can be wrapped into the concrete to prevent it from rusting.

Embodiment three:

The difference from the first embodiment is that, as shown in Fig. 12 and Fig. 13 , it also includes a prefabricated ground beam 8 arranged on the side of the column body 1, and the prefabricated ground beam 8 connects two adjacent prefabricated foundation columns. The prefabricated ground beams 8 are pre-embedded with ground beam connecting ribs 81 in the horizontal direction, and the ground beam connecting ribs 81 are connected with the foundation prefabricated columns. A foundation post-cast belt is set between the end of the prefabricated ground beam 8 and the column body 1, and after the concrete is poured, the prefabricated ground beam 8 is connected to the foundation as a whole.

The ground beam connecting bars 81 and the column connecting bars 11 can be connected by conventional fixed connection methods such as binding connection, welding, straight thread sleeve 101 connection and the like.

As shown in Figure 14, the end of the ground beam connecting rib 81 of the prefabricated ground beam 8 is set as an enlarged head 103, as shown in Figure 15, the end of the column connecting rib 11 is an expanding head 103, and the ground beam connecting rib 81 is connected to the column The connecting ribs 11 are connected by a sleeve 101 (the structure of the sleeve 101 and its connection method are described in the last paragraph).

Embodiment four:

As shown in FIG. 16 , the difference from the third embodiment is that a number of penetration holes 12 are opened on the upper side wall of the column body 1 , and the penetration holes 12 are through holes or blind holes arranged horizontally. As shown in FIG. 17 , the basic structure also includes perforated ribs 13 passing through the piercing holes 12 , and the two ends of the perforated ribs 13 are fixedly connected to the ground beam connecting ribs 81 on both sides thereof.

When the prefabricated ground beam 8 is arranged in a T shape, the piercing hole 12 on one side may be a blind hole.

The provision of the piercing hole 12 not only facilitates the transportation and installation of the foundation prefabricated columns, but also facilitates the connection of the ground beams, and at the same time makes the connection of the ground beams more flexible and convenient for adjustment.

As shown in Figure 17, the two ends of perforated rib 13 are set as enlarged head 103, and as shown in Figure 18, the ends of ground beam connecting rib 81 are enlarged head 103, and perforated rib 13 is connected with ground beam connecting rib 81 with sleeve 101.

Embodiment five:

The difference from the third embodiment is that, as shown in Figure 19, a post-cast filling belt 14 is provided between the steel plate 71 and the top of the column body 1, and the ground beam connecting ribs 81 of two adjacent prefabricated ground beams 8 are placed in the post-cast filling belt. 14 internal connections. After the concrete is poured in the post-pouring filling belt 14, the prefabricated ground beam 8 and the foundation are connected into a whole.

Further, both ends of the ground beam connecting bars 81 of the prefabricated ground beams 8 are provided with enlarged heads 103 , and the ground beam connecting bars 81 of two adjacent prefabricated ground beams 8 are connected by sleeves 101 .

The foundation structure does not need to make any improvement on the side of the foundation prefabricated column body 1, and can also realize the integration of the prefabricated ground beam 8 and the foundation.

Embodiment six:

The difference from Embodiment 5 is that, as shown in Figure 20, the height of the prefabricated ground beam 8 is greater than that of the column 1, and the concrete at the bottom of the column 1 is divided into two pours, and the bottom is the first pouring area 52, which is located at The top is the second pouring area 53 ; part of the ground beam connecting bars 81 of two adjacent prefabricated ground beams 8 are connected in the second pouring area 53 .

The construction steps are as follows:

As shown in Figure 21, the foundation prefabricated column is first installed on the inner cushion of the foundation pit 5, and the steel bars are bound to fix the foundation prefabricated column;

As shown in Figure 22, the first pouring area 52 concrete is poured;

As shown in Figure 23, after the concrete in the first pouring area 52 is solidified, the prefabricated ground beams 8 are installed on the top of the concrete in the first pouring area 52, and the two adjacent prefabricated ground beams 8 are positioned on the top and bottom of the column body 1. Beam connecting rib 81 is welded or sleeve 101 is connected;

24 and 20, pour the concrete in the second pouring area 53 and the concrete between the two adjacent prefabricated ground beams 8, and stop pouring when the concrete top surface is poured to the bottom of the shear pile 72;

Finally, as shown in Figure 20, the H-shaped steel 7 is installed, and the concrete of the post-pouring filling belt 14 is poured.

Embodiment seven:

The difference from Embodiment 1 is that, as shown in Figure 25, the part of the rod 21 exposed on the upper surface of the cylinder 1 is provided with a threaded thread, and the end of the rod 21 becomes an enlarged head after the nut is screwed into the threaded thread 103. As shown in Figure 26, the basic structure also includes a precast concrete column 9, the bottom of the precast concrete column 9 is pre-embedded with a bottom connecting bar 91 protruding downward, and the lower end of the bottom connecting bar 91 is set as an enlarged head 103; the bottom connecting bar 91 and The enlarged head 103 of the anchor bolt 2 is connected with a sleeve 101; a post-cast belt is set between the bottom surface of the precast concrete column 9 and the top surface of the precast foundation column.

As shown in FIG. 27 , the end of the rod portion 21 of the anchor bolt 2 exposed on the upper surface of the cylinder 1 is set as an enlarged head 103 . As shown in FIG. 28 , the connecting rib 91 at the bottom of the precast concrete column 9 is connected to the enlarged head 103 of the anchor bolt 2 with a sleeve 101 .

Embodiment eight:

The difference from Embodiment 1 is that, as shown in FIG. 29 , the foot 22 of the prefabricated foundation column is located inside the column body 1 , and the bottom surface of the prefabricated foundation column is in contact with the bottom of the foundation pit 5 . Compared with the above-mentioned prefabricated foundation column, the foundation prefabricated column here has a larger cross-sectional size. The bottom of the column body 1 does not need to be embedded in the post-cast concrete, but is directly placed in the foundation pit 5, using its own Gravity Advantage is used as a base.

As shown in FIG. 30 , the top of the basic prefabricated column is connected to the precast concrete column 9 with a sleeve 101 .

Further, in combination with Figures 31 and 32, the precast concrete column 9 is provided with a hollow 92 that penetrates up and down; the hollow 92 is filled with concrete and connected with the post-cast concrete; the column 1 is provided with a through hole 42 that penetrates up and down, and the through hole 42 is filled Concrete and connected with post-cast strip concrete.

Preferably, a long vertical steel bar is arranged in the through hole 42 and the hollow 92 of the prefabricated concrete column 9, and multiple vertical steel bars are connected with stirrups. Thereby, the connection between the foundation prefabricated column and the precast concrete column 9 is further strengthened.

As shown in FIG. 33 , the foundation structure may also include prefabricated ground beams 8 , and the ground beam connecting ribs 81 of the prefabricated ground beams 8 are connected by sleeves 101 .

Embodiment nine,

A construction method for a foundation structure, comprising the following installation steps:

Step a, look back at Figure 2, dig foundation pit 5, pour concrete cushion 51 at the bottom of foundation pit 5 and arrange reinforcing mesh on the cushion;

Step b, lifting the foundation prefabricated column and vertically placing it in the foundation pit 5;

Step c, adjust the position of the foundation prefabricated column, keep the rod portion 21 of the anchor bolt 2 vertical, support it through the supporting steel bar 3 or the anchor bolt 2, and set temporary positioning if necessary;

Step d, pouring concrete at the bottom of the foundation pit 5, so that the concrete covers the lower part of the column body 1. When the shape of the foundation pit 5 is irregular, the formwork can be poured. When the limit hole is in the form of upper and lower through holes, it can directly pass through the limit hole injecting concrete for pouring;

Step e, connect the ground beam connecting ribs 81 of the prefabricated ground beam 8 with each other, or connect the ground beam connecting ribs 81 of the prefabricated ground beam 8 with the column connecting ribs 11, or connect the ground beam connecting ribs 81 of the prefabricated ground beam 8 with the The perforated ribs 13 are connected, and the post-casting belt between two adjacent prefabricated ground beams 8 is poured;

In step f, the foundation pit 5 is backfilled after the concrete at the bottom of the foundation pit 5 is solidified.

Embodiment ten,

A construction method for a basic structure, as shown in Figure 29-Figure 33, includes the following installation steps:

Step a, digging a foundation pit 5, placing the foundation prefabricated columns vertically in the foundation pit 5;

Step b, installing vertical reinforcement in the through hole 42 of the foundation prefabricated column, and binding the stirrup;

Step c, install the precast concrete column 9 above the foundation precast column, and penetrate the vertical reinforcement into the hollow 92; the precast concrete column 9 can be temporarily supported by support blocks such as I-beams;

Step d, connecting the expansion head 103 on the top of the foundation prefabricated column with the expansion head 103 on the bottom of the precast concrete column 9 with a sleeve 101;

Step e, install the prefabricated ground beams 8 on both sides, and connect the ground beam connecting ribs 81 of the prefabricated ground beams 8 with the sleeve 101;

Step f: Concrete is poured in the post-cast strip between the top of the foundation prefabricated column and the bottom of the precast concrete column 9 .

Sleeve structure and connection method introduction:

Sleeve 101 can adopt shrink-fit type steel bar sleeve and outwardly protruding into clip type sleeve.

(Because above ground beam connecting bar 11, perforated bar 13, bar portion 21 of anchor bolt 2, and connecting steel bar 81 of prefabricated ground beam 8, and the bottom connecting bar 91 of precast concrete column 9 are all provided with enlarged head 103 , so the connecting steel bars 102 below represent all the above steel bars for description. The components on both sides of the sleeve 101 are described with the prefabricated ground beam 8 as an example)

Necked steel sleeve:

As shown in Figure 34, the necked steel bar sleeve includes a cylinder 6 and a neck 61 integrally connected to both ends of the cylinder 6. Several evenly distributed grouting holes 62 are opened on the cylinder 6 to facilitate the flow of cement slurry into the cylinder. Inside the body 6; in combination with Figure 35, the necking 61 is a round mouth, the inner wall of the necking 61 is conical, and the larger end of the conical surface faces the inside of the cylinder 6; in combination with Figure 36, the connection structure of the necking type steel bar sleeve It is composed of connecting steel bar 102 and cylinder body 6. One end of connecting steel bar 102 is pre-embedded and fixedly connected inside the prefabricated ground beam 8, and the other end is exposed outside the prefabricated ground beam 8 and is integrally connected with an expanding head at the end far away from the prefabricated ground beam 8. 103 , the radial dimension of the outer wall of the expanding head 103 is greater than the radial dimension of the outer wall of the connecting steel bar 102 and smaller than the radial dimension of the inner wall of the constriction 61 , and the expanding head 103 can extend into the cylinder body 6 from the constriction 61 .

As shown in Figure 37, after the cement slurry flows into the cylinder body 6 from the grouting hole 62 and solidifies to form concrete, the expanding head 103 can be fixed inside the cylinder body 6, and the connecting steel bars 102 at both ends of the cylinder body 6 can be restricted from moving away from each other. Pull out the cylinder body 6 by moving in the direction, so as to connect the prefabricated ground beams 8 at both ends (the schematic diagram of the rectangular block structure connecting the steel bars 102 away from the end of the cylinder body 6 in Figure 37 is the prefabricated ground beam 8), and improve the two prefabricated ground beams. The connection strength between 8. The end of the enlarged head 103 close to the connecting steel bar 102 is in the shape of a conical table, and the end of the enlarged head 103 close to the prefabricated ground beam 8 is smaller than the other end; for ease of description, the conical surface of the constriction 61 is defined as a transitional conical surface 611, and the conical surface of the constriction 61 and the tube The ends of the body 6 are integrally connected by a transitional conical surface 611. After the connecting steel bar 102 is subjected to the force in the direction of pulling out the cylinder body 6, the concrete is extruded on the circular platform, and the concrete will be extruded by the force (as indicated by the F arrow in Figure 37). The direction is the schematic diagram of the force direction) to the transition conical surface 611, and the reaction force generated by the transition conical surface 611 has a radial component force on the enlarging head 103, compressing the enlarging head 103 in the radial direction, therefore, the transition conical surface 611 can make the cylinder body 6 and the concrete inside bear a larger load, and improve the connection strength between the connecting steel bar 102 and the expanding head 103 and the cylinder body 6 .

Compared with the existing grouting sleeve, this sleeve does not require a separate grouting operation, but when pouring concrete, the concrete grout enters the cylinder 6 to complete the connection of the connecting steel bar 102, which is more convenient to operate and does not require special grouting materials ,save costs. In addition, since the scheme relies on pressure transmission, the connection is more reliable than the grouting sleeve relying on the bonding between the grouting material and the steel bar.

The shape of the constriction 61 can be circular, and can also be various shapes such as square, strip and ellipse, and the cross section of the enlarging head 103 is adapted to the shape of the constriction 61 . In order to effectively transmit the pressure of the expanding head 103 to the cylinder body 6 through the concrete, the size of the constriction 61 is larger than that of the expanding head 103 by 1-5 mm, preferably 2-3 mm.

As shown in Fig. 38 and Fig. 39, the cylinder body 6 has a split structure and can be split into two halves along the axial direction. The outer surfaces of one end of the two half cylinders 6 that are close to each other are fixedly connected with a connecting plate 63, and the connecting plate 63 is provided with a connecting hole 631. After the two half cylinders 6 are butted together, the connecting holes 631 on the connecting plate 63 can be connected to each other. Alignment, by inserting pins or bolts and other plugs into two mutually aligned connecting holes 631 at the same time, the two connecting plates 63 are pinned, and the two half cylinders 6 are limited to separate from each other in a direction away from each other.

When the distance between the two prefabricated ground beams 8 is relatively small, the distance between the ends of the connecting steel bars 102 embedded in the prefabricated ground beams 8 is also relatively small, so the cylinder body 6 can be split into two halves , one half of the cylinder body 6 is first inserted into one of the connecting steel bars 102, and then the other half of the cylinder body 6 is sleeved on the connecting steel bar 102, and finally the two half cylinder bodies 6 are inserted along the axial direction of the connecting steel bar 102 and toward the Sliding in the direction of approaching each other, the connecting holes 631 on the connecting plate 63 are aligned with each other, and the two halves of the cylindrical body 6 are put together by inserting the plug into the connecting holes 631 .

As shown in Fig. 40, when connecting two steel bars in a vertical state, in order to temporarily fix the sleeve 101 at the docking position of the two connecting steel bars 102 more conveniently before pouring concrete, it will not slip. Therefore, a blocking element 64 that prevents the enlarging head 103 from penetrating through the sleeve 101 is fixedly connected to the middle of the inner wall of the cylinder body 6 . The blocking element 64 may be a disc plate located in the middle of the cylinder body 6 . Further, in order to allow the cement slurry to flow freely in the barrel 6 , the blocking element 64 is arranged in a hollow ring shape, and the inner diameter of the ring is smaller than the diameter of the expanding head 103 . Alternatively, the blocking element 64 can also be a rod arranged along the radial direction of the cylinder body 6 .

Overhanging snap-in sleeve:

As shown in Fig. 41 and Fig. 42, the clamp-type sleeve extending outward includes a cylinder body 6, a clamping block 65, and a shrapnel 66, and both ends of the cylinder body 6 are provided with clamping holes for the clamping block 65 to be inserted into. 651 , a grouting hole 62 is opened on the cylinder body 6 . One end of the elastic piece 66 is fixedly connected to the outer surface of the cylinder body 6 , and the other end of the elastic piece 66 is fixedly connected to one end of the clamping block 65 located outside the cylinder body 6 .

One end of the connecting steel bar 102 is fixedly connected with an expanding head 103 , the radial dimension of the expanding head 103 is larger than that of the connecting steel bar 102 , and the expanding head 103 can be inserted into the cylinder body 6 from the port of the cylinder body 6 . During the insertion process, when the expansion head 103 pushes the clamping block 65 to move away from the central axis of the cylinder body 6, the spring piece 66 is elastically deformed. Reset to restrict the enlarging head 103 from pulling out of the barrel 6 .

When the post-casting belt around the cylinder body 6 is pouring concrete, the cement slurry can flow into the cylinder body 6 from the two ports of the cylinder body 6 and the grouting hole 62, and solid concrete is formed after the cement slurry is solidified, so that the connecting steel bar 102 is fixed on the cylinder body 6, so as to realize the connection of two connecting steel bars 102.

In addition, it should be pointed out that the four sleeve-related invention patents submitted by the applicant on April 8, 2018, the application numbers are 201810306670.4, 201810307419.X, 201810307420.2 and 201810307967.2.

This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications to this embodiment without creative contribution as required after reading this specification, but as long as they are within the rights of the present invention All claims are protected by patent law.

Claims (39)

1. a kind of basis prefabricated post, which is characterized in that including cylinder（1）And foundation bolt（2）, the foundation bolt（2）Vertically It pours in cylinder（1）It is interior, the foundation bolt（2）Including bar portion（21）With perpendicular to bar portion（21）Stabilizer blade（22）, the bar Portion（21）Cylinder is stretched out in upper part（1）It is placed in cylinder（1）Top.

2. basis prefabricated post according to claim 1, which is characterized in that the foundation bolt（2）Bar portion（21）Downwards Stretch out cylinder（1）Bottom surface, stabilizer blade（22）Positioned at cylinder（1）It is external.

3. basis prefabricated post according to claim 1, which is characterized in that the foundation bolt（2）Stabilizer blade（22）It is located at Cylinder（1）Inside, the cylinder（1）Bottom is provided with several vertical spacer bars（3）, the spacer bar（3）It pours upper end It builds in the cylinder（1）It is internal.

4. basis prefabricated post according to claim 1, which is characterized in that cylinder（1）For reinforced concrete structure, inside is set It is equipped with reinforcing bar.

5. basis prefabricated post according to claim 1, which is characterized in that the stabilizer blade（22）Towards cylinder（1）Outside Or inside.

6. basis prefabricated post according to claim 1, which is characterized in that the cylinder（1）Upper end center position offers Location hole（4）.

7. basis prefabricated post according to claim 6, which is characterized in that the location hole（4）For the counterbore of upper end opening Structure.

8. basis prefabricated post according to claim 6, which is characterized in that the location hole（4）To run through cylinder（1）It is logical Pore structure.

9. basis prefabricated post according to claim 8, which is characterized in that be provided with vertical stiffener in through-hole (41)。

10. basis prefabricated post according to claim 1, which is characterized in that the cylinder（1）Upper side horizontal direction is pre- It is embedded with cylinder dowel（11）.

11. basis prefabricated post according to claim 10, which is characterized in that the cylinder dowel（11）Exposed end It is set as enlarged footing（103）.

12. basis prefabricated post according to claim 1, which is characterized in that the cylinder（1）If being offered in upper portion side wall Dry jack hole（12）, the jack hole（12）For horizontally disposed through-hole or blind hole.

13. basis prefabricated post according to claim 1, which is characterized in that the bar portion（21）Expose to cylinder（1）Upper table The part in face offers screw thread, and nut is screwed into after screw thread becomes enlarged footing by bar portion end（103）.

14. basis prefabricated post according to claim 1, which is characterized in that the bar portion（21）Expose to cylinder（1）Upper table The end in face is set as enlarged footing（103）.

15. a kind of foundation structure, which is characterized in that include the basic prefabricated post as described in any one of claim 1-14, Cylinder（1）Bottom is embedded in cast-in-place base concrete.

16. foundation structure according to claim 15, which is characterized in that cylinder（1）Top is connect with steel column.

17. foundation structure according to claim 16, which is characterized in that steel column bottom surface is equipped with junction steel plate（71）, steel plate （71）With cylinder（1）Top bolt connects.

18. foundation structure according to claim 17, which is characterized in that steel plate（71）Plane perpendicular is connected with shear pile （72）, shear pile（72）Stretch into location hole（4）In.

19. foundation structure according to claim 18, which is characterized in that steel plate（71）With cylinder（1）It is arranged between top After pour filling tape (14).

20. foundation structure according to claim 19, which is characterized in that steel plate（71）And coagulation is poured around fixing bolt Soil wraps up connecting portion, prevents from getting rusty.

21. foundation structure according to claim 15, which is characterized in that location hole（4）In vertically arranged stiffener And casting concrete (41),.

22. foundation structure according to claim 15, which is characterized in that further include being set to cylinder（1）Side it is prefabricated Ground beam (8), prefabricated ground beam (8) connect adjacent two basic prefabricated posts.

23. foundation structure according to claim 22, which is characterized in that prefabricated ground beam（8）Horizontal direction is embedded with ground beam Dowel（81）, ground beam dowel（81）(81) it is connect with basis prefabricated post.

24. foundation structure according to claim 23, which is characterized in that ground beam dowel（81）It is solid with cylinder dowel It connects.

25. foundation structure according to claim 24, which is characterized in that cylinder dowel end is enlarged footing（103）, ground Beam dowel（81）Enlarged footing is arranged in end（103）, ground beam dowel（81）With cylinder dowel sleeve（101）Connection.

26. foundation structure according to claim 23, which is characterized in that further include the perforation muscle across jack hole（13）, Perforation muscle (13) and ground beam dowel（81）It is affixed.

27. foundation structure according to claim 26, which is characterized in that the perforation muscle（13）Both ends are set as enlarged footing （103）, ground beam dowel（81）End is enlarged footing（103）, muscle of perforating（13）With ground beam dowel（81）Use sleeve（101）Even It connects.

28. foundation structure according to claim 27, which is characterized in that further include precast concrete column (9), concrete Earth pillar bottom surface setting bottom connects muscle (91), and end is enlarged footing（103）, the enlarged footing of precast concrete column（103）With cylinder（1） The enlarged footing at top（103）Use sleeve（101）Connection.

29. foundation structure according to claim 23, which is characterized in that poured after being arranged between 1 top of steel plate 71 and cylinder Filling tape（14）, two neighboring prefabricated ground beam（8）Ground beam dowel（81）Filling tape is poured after（14）Inside connection.

30. foundation structure according to claim 29, which is characterized in that prefabricated ground beam（8）Ground beam dowel（81）Two End is set as enlarged footing（103）, two neighboring prefabricated ground beam（8）Ground beam dowel（81）Use sleeve（101）Connection.

31. foundation structure according to claim 23, which is characterized in that prefabricated ground beam（8）Height be more than cylinder（1）'s Highly, cylinder（1）Lower concrete is divided into two-step pouring, and what it is positioned at bottom is the first pouring area (52), and what it is positioned at top is Two pouring areas (53)；Two neighboring prefabricated ground beam（8）Part ground beam dowel（81）Connected in the second pouring area (63) It connects.

32. a kind of foundation structure, which is characterized in that include the basic prefabricated post as described in any one of claim 13-14, It further include precast concrete column（9）, precast concrete column（9）Bottom is embedded with the bottom extended downwardly and connects muscle（91）, bottom connects Muscle（91）Lower end be set as enlarged footing（103）；Bottom connects muscle（91）With foundation bolt（2）Enlarged footing（103）Use sleeve （101）Connection；Precast concrete column（9）Post-cast strip is set between bottom surface and basic prefabricated post top surface.

33. a kind of foundation structure, which is characterized in that include the basic prefabricated post as described in any one of claim 13-14, It is characterized in that, stabilizer blade（22）Positioned at cylinder（1）Inside, basic prefabricated post bottom surface are affixed with bottom of foundation ditch.

34. foundation structure according to claim 33, which is characterized in that precast concrete column（9）It is provided with and runs through up and down Hollow (92)；Hollow (92) interior concrete perfusion is simultaneously connect with post-cast strip concrete.

35. foundation structure according to claim 34, which is characterized in that cylinder（1）Perforative through-hole (42) above and below setting, The interior concrete perfusion of through-hole (42) is simultaneously connect with post-cast strip concrete.

36. foundation structure according to claim 35, which is characterized in that cylinder（1）Through-hole (42) and precast concrete Column（9）Hollow (92) in the elongated vertical reinforcement of setting.

37. a kind of construction method of foundation structure, it is characterised in that：Including following installation steps：

Step a, foundation pit is dug（5）, foundation pit（5）Bottom pours concrete bed course（51）；

Step b, basic prefabricated post is vertically placed on foundation pit（5）It is interior；

Step c, it adjusts basic prefabricated post position and reinforces, make foundation bolt（2）Bar portion（21）Keep vertical；

Step d, foundation pit（5）Bottom casting concrete makes concrete coat cylinder（1）Lower part；

Step e, foundation pit（5）Foundation pit is carried out after lower concrete solidification（5）Backfill.

38. according to a kind of construction method of foundation structure described in claim 37, which is characterized in that further include step d-1, incite somebody to action Prefabricated ground beam（8）Ground beam dowel（81）It is connected with each other, or by prefabricated ground beam（8）Ground beam dowel（81）With prefabricated ground beam （8）The connection of cylinder dowel, or by prefabricated ground beam（8）Ground beam dowel（81）With perforation muscle（13）Connection, and pour phase Adjacent two prefabricated ground beams（8）Between post-cast strip.

39. a kind of construction method of foundation structure, it is characterised in that：Including following installation steps：

Step a, foundation pit is dug（5）, basic prefabricated post is vertically placed on foundation pit（5）It is interior；

Step b, precast concrete column is installed above basic prefabricated post（9）；

Step c, by the enlarged footing at the top of basic prefabricated post（103）With precast concrete column（9）The enlarged footing of lower part（103）With set Cylinder（101）Connection；

Step d, by basic prefabricated post top and precast concrete column（9）Post-cast strip casting concrete between bottom.