CN211713947U - Vertical connection structure of sleeve-type prefabricated underground continuous wall of pre-buried front and back row reinforcing bar - Google Patents

Abstract

The utility model discloses a vertical connection structure of telescopic prefabricated underground continuous wall of row's reinforcing bar around pre-buried aims at providing a joint strength height, wholeness is good, can satisfy wall body bending resistance and shearing requirement, and the leakproofness is good, can satisfy the telescopic prefabricated underground continuous wall of row's reinforcing bar sleeve around pre-buried of prevention of seepage stagnant water requirement vertical connection structure. It includes a lower prefabricated underground continuous wall; prefabricating an underground continuous wall on the upper part; the horizontal joint sealing structure comprises two slurry leakage preventing sealing rubber strips positioned between an upper wall interface and a lower wall interface, a grouting cavity formed between the two slurry leakage preventing sealing rubber strips and high-strength grouting material filled in the grouting cavity; the front-row vertical connecting assemblies comprise a plurality of vertical connecting assemblies which are sequentially distributed along the length direction of the underground continuous wall; the back row vertical connecting assembly comprises a plurality of vertical connecting assemblies which are sequentially distributed along the length direction of the underground diaphragm wall.

Description

Vertical connection structure of sleeve-type prefabricated underground continuous wall of pre-buried front and back row reinforcing bar

Technical Field

The utility model relates to a foundation ditch is with prefabricated underground continuous wall, concretely relates to row's sleeve-type prefabricated underground continuous wall vertical connection structure of reinforcing bar around pre-buried.

Background

In the design and construction of foundation pit enclosure, an underground continuous wall is often used as an enclosure wall, and the traditional cast-in-place underground continuous wall has more quality defects of wall bodies due to factors such as underwater concrete pouring and the like, such as mud clamping, sticky skin, pitted surface, exposed ribs, poor flatness, inaccurate positions of end cavities or honeycombs and prefabricated parts and the like. The process for prefabricating the underground continuous wall can well solve the quality defects, and meanwhile, the prefabricated underground continuous wall has the advantages of high strength, industrial manufacture, high construction speed, environmental friendliness, construction site saving and the like.

The existing prefabricated underground continuous wall is influenced by factors such as traffic transportation control, site turning radius and the like, and the length of a single wall of the prefabricated underground continuous wall is usually limited and generally does not exceed 13-18 m; however, in actual foundation pit engineering, the excavation depth is deep, and the insertion depth of a single wall cannot meet the design requirement, so that two or even a plurality of prefabricated underground continuous walls are often vertically connected, and the wall depth meeting the design requirement is further achieved. Because the prefabricated underground continuous walls need to bear great underground water and soil pressure, the vertical connecting structure between the two prefabricated underground continuous walls needs to have enough strength requirements of bending resistance and shearing resistance, the upper and lower walls form a reliable whole, and bending and shearing damage under the action of the water and soil pressure outside the pit is avoided; meanwhile, a gap between the two prefabricated underground continuous walls is often a key node for the problem of water leakage, so that the vertical connecting structure also needs to meet the requirements of seepage prevention and water stop, and the problem of water leakage at the joint position in the excavation process of the foundation pit is avoided. Therefore, the connection strength, the integrity, the sealing performance and the reliability of the vertical connection structure of the two prefabricated underground continuous walls directly determine the application and the popularization of the prefabricated underground continuous wall technology.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a joint strength is high, the wholeness is good, can satisfy wall body bending resistance and shearing requirement, and the leakproofness is good simultaneously, can satisfy the vertical connection structure of the telescopic prefabricated underground continuous wall of row's of pre-buried front and back reinforcing bar of the requirement of prevention of seepage stagnant water.

The technical scheme of the utility model is that:

a pre-buried front and rear row steel bar sleeve type prefabricated underground continuous wall vertical connection structure comprises a lower prefabricated underground continuous wall; an upper prefabricated underground continuous wall supported on the top surface of the lower prefabricated underground continuous wall; the horizontal joint sealing structure comprises an upper wall interface formed by the bottom surface of an upper prefabricated underground continuous wall, a lower wall interface formed by the top surface of a lower prefabricated underground continuous wall, two anti-leakage sealing rubber strips positioned between the upper wall interface and the lower wall interface, a grouting cavity formed between the two anti-leakage sealing rubber strips and a high-strength grouting material filled in the grouting cavity, wherein the two anti-leakage sealing rubber strips are connected with the upper wall interface and the lower wall interface in a sealing manner, and the high-strength grouting material is connected with the upper wall interface and the lower wall interface in a sealing manner; the front-row vertical connecting assemblies comprise a plurality of vertical connecting assemblies which are sequentially distributed along the length direction of the underground continuous wall; the rear-row vertical connecting assemblies comprise a plurality of vertical connecting assemblies which are sequentially distributed along the length direction of the underground continuous wall; vertical coupling assembling includes pre-buried spliced pole, pre-buried spliced pole and the position sleeve on pre-buried last underground continuous wall in the prefabricated underground continuous wall of upper panel under pre-buried lower top at the top of lower panel, go up pre-buried spliced pole the lower extreme by the position sleeve in the position sleeve's last port inserts the position sleeve, position sleeve's lower port is located the prefabricated underground continuous wall's of upper panel bottom, the upper end of pre-buried spliced pole is inserted in the position sleeve by position sleeve's lower port down, position sleeve's inner chamber adopts the grout that excels in to fill.

In the vertical connecting structure of the pre-embedded front and rear rows of steel bar sleeve type prefabricated underground continuous walls, the front row of vertical connecting assemblies and the rear row of vertical connecting assemblies are adopted to connect the lower prefabricated underground continuous walls and the upper prefabricated underground continuous walls, compared with the connecting mode of a single row of vertical connecting assemblies, the front and rear rows of vertical connecting assemblies are more reliable in connection, higher in strength and better in stress performance, can meet the action of larger shearing force and bending moment, and enables the application range of prefabricated underground continuous walls to be wider; specifically, the vertical connecting assembly adopts an upper embedded connecting column to stretch into the positioning sleeve to position the positioning sleeve, and the lower embedded connecting column stretches into the positioning sleeve and the inner cavity of the positioning sleeve is filled with high-strength grouting material to connect the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall into a whole;

the horizontal seam sealing structure in the vertical connecting structure of the pre-buried front and rear row reinforced sleeve type prefabricated underground continuous wall adopts two anti-leakage sealing rubber strips and a high-strength grouting material to connect the upper wall interface and the lower wall interface, and the anti-leakage sealing rubber strips are compact under the action of gravity of the upper underground continuous wall, and the high-strength grouting material is compact, so that the sealing performance of the upper wall interface and the lower wall interface is good, the water stop is reliable and high, and the requirements of seepage prevention and water stop can be met.

More importantly, due to the limitation of the manufacturing precision of the prefabricated underground continuous wall, the inner diameter of the positioning sleeve is at least 30mm larger than the diameter of the lower embedded connecting column, thus, when the installation is ensured, each lower embedded connecting column can be smoothly inserted into the corresponding positioning sleeve, but in this way, a gap exists between the positioning sleeve and the lower embedded connecting column, in the process of excavating the foundation pit, the water and soil pressure outside the foundation pit acts on the prefabricated underground continuous wall, and because a gap exists between the positioning sleeve and the lower embedded connecting column, so that the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall are easy to generate horizontal dislocation until the lower embedded connecting column is abutted against the side wall of the positioning sleeve, therefore, the sealing structure of the horizontal seam is damaged, so that the sealing structure between the interface of the upper wall and the interface of the lower wall is damaged, and the problem of water leakage is caused; therefore, the scheme fills the high-strength grouting material in the gap between the positioning sleeve and the lower embedded connecting column to eliminate the gap between the positioning sleeve and the lower embedded connecting column, so that the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall are stably and reliably connected into a whole, and the problem of water leakage caused by the fact that the sealing structure between the upper prefabricated underground continuous wall interface and the lower prefabricated underground continuous wall interface is damaged due to the fact that the gap exists between the positioning sleeve and the lower embedded connecting column and horizontal dislocation is easily caused between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall is avoided.

On the other hand, the prefabricated component is convenient to factory-made customization of components by adopting pre-buried upper and lower pre-buried connecting columns, positioning sleeves and other reservation measures, the prefabricated component is high in prefabrication degree, and the site construction is convenient and fast. The upper and lower embedded connecting columns and the positioning sleeve are matched to play a role in positioning, so that accurate positioning and smooth wall surface of the upper and lower underground continuous walls are ensured.

Preferably, the front row of vertical connecting assemblies are close to the outer side of the foundation pit, and the rear row of vertical connecting assemblies are close to the inner side of the foundation pit. Adopt front-seat vertical coupling assembling and back row vertical coupling assembling to connect prefabricated underground continuous wall of next breadth and prefabricated underground continuous wall of last breadth, compare single vertical coupling assembling's connected mode, front and back double vertical coupling assembling's connection is more reliable, and intensity is higher, and the atress performance is better, can satisfy bigger shear force and moment of flexure effect, makes the continuous application scope in prefabricated underground wider.

Preferably, the thickness of the lower prefabricated underground continuous wall is the same as that of the upper prefabricated underground continuous wall, and the distance between the front row of vertical connecting assemblies and the rear row of vertical connecting assemblies is less than half of the thickness of the lower prefabricated underground continuous wall.

Preferably, the vertical connecting assemblies of the front row of vertical connecting assemblies and the vertical connecting assemblies of the rear row of vertical connecting assemblies are distributed in parallel or in a staggered manner.

Preferably, the prefabricated underground continuous wall grouting structure further comprises a grouting structure, a grouting opening and a grout outlet are formed in the side wall of the positioning sleeve, the grouting opening is located below the grout outlet, the grouting structure comprises a grouting hole and a grout outlet, the grouting hole and the grout outlet are formed in the side face of the upper prefabricated underground continuous wall, the grouting hole is communicated with the grouting opening, the grout outlet is communicated with the grout outlet, the grouting hole, the grouting opening, the inner cavity of the positioning sleeve, the grout outlet and the grout outlet form a grouting channel together, the grouting hole is used for injecting high-strength grouting material, and the inner cavity of the positioning sleeve is filled with the high-strength grouting material. The grouting hole is located below the grout outlet, and high-strength grouting material is injected through the grouting hole, so that the high-strength grouting material is favorable for filling a grouting channel, the gap between the positioning sleeve and the lower embedded connecting column and the gap between the positioning sleeve and the upper embedded connecting column are guaranteed to be filled by the high-strength grouting material, the phenomenon that the gap between the positioning sleeve and the lower embedded connecting column is filled with a cavity to influence the connection strength, horizontal dislocation is easily generated between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall, and the sealing structure between the upper wall interface and the lower wall interface is damaged is avoided.

Preferably, a bottom head tank is further arranged on the bottom surface of the upper prefabricated underground continuous wall, and the lower end of the positioning sleeve is communicated with the bottom head tank. Therefore, after the upper prefabricated underground continuous wall is supported on the top surface of the lower prefabricated underground continuous wall, one part of the high-strength grouting material in the grouting cavity between the two anti-leakage sealing rubber strips is pressed into the bottom pulp flowing groove, and after the high-strength grouting material is cured, the sealing performance between the upper wall interface and the lower wall interface can be further improved, and the structural strength between the upper wall interface and the lower wall interface can be improved.

Preferably, a sealant is further disposed at a gap of an edge between the upper wall interface and the lower wall interface to seal the gap of the edge between the upper wall interface and the lower wall interface. Thus, the sealing reliability between the upper panel wall interface and the lower panel wall interface can be further improved.

Preferably, the top surface that the prefabricated underground continuous wall of lower panel buries is equipped with two mounting grooves, and the mounting groove extends along underground continuous wall's length direction, two leak protection thick liquid joint strip and mounting groove one-to-one, leak protection thick liquid joint strip inlays to be established in the mounting groove that corresponds. So in the actual construction of being convenient for, installation leak protection thick liquid joint strip.

Preferably, the strength grade of the high-strength grouting material is more than 60 MPa.

Preferably, the lower prefabricated underground continuous wall comprises lower wall concrete, and lower wall vertical ribs and lower wall horizontal distribution ribs which are pre-embedded in the lower wall concrete.

Preferably, the upper prefabricated underground continuous wall comprises upper wall concrete and horizontal distribution ribs which are embedded in vertical ribs and horizontal distribution ribs of the upper wall.

Preferably, the lower wall interface is roughened, and the interface agent is brushed after the roughening.

Preferably, the interface of the upper wall is roughened, and the interface agent is brushed after the roughening.

The utility model has the advantages that: the wall has the advantages of high connection strength, good integrity, good sealing performance and capability of meeting the requirements of bending resistance and shearing resistance of the wall body and meeting the requirements of seepage prevention and water stop.

Drawings

Fig. 1 is a schematic view of a local structure of a certain position of the vertical connection structure of the prefabricated underground continuous wall with the front and rear embedded steel bar sleeves according to the first embodiment of the present invention.

Fig. 2 is a schematic view of a partial structure at a-a in fig. 1.

Fig. 3 is another partial structure view at a-a in fig. 1.

Fig. 4 is a schematic view of a local structure of another part of the vertical connection structure of the prefabricated underground continuous wall with the embedded front and rear rows of steel bars.

Fig. 5 is a partial structural schematic view of a lower prefabricated underground continuous wall according to a first embodiment of the present invention.

Fig. 6 is a partial structural schematic view of an upper prefabricated underground continuous wall according to a first embodiment of the present invention.

Fig. 7 is a partial structural schematic view of an upper prefabricated underground continuous wall according to a second embodiment of the present invention.

Fig. 8 is a partial structural view of a prefabricated underground diaphragm wall of a lower panel according to a third embodiment of the present invention.

Fig. 9 is a schematic view of a local structure of the vertical connection structure of the sleeve-type prefabricated underground continuous wall with the embedded front and rear rows of steel bars according to the third embodiment of the present invention.

In the figure:

prefabricating an underground continuous wall 1 on the lower part;

prefabricating an underground continuous wall 2 on the upper part;

the device comprises a front row of vertical connecting assemblies 3a, a rear row of vertical connecting assemblies 3b, vertical connecting assemblies 3, a lower embedded connecting column 3.1, a positioning sleeve 3.2 and an upper embedded connecting column 3.3;

a horizontal seam sealing structure 4, a lower wall interface 4.1, an upper wall interface 4.2, a leak-proof sealing rubber strip 4.3, a grouting cavity 4.4, a sealant 4.5 and a mounting groove 4.6;

a grouting opening 5.1, a grout outlet 5.2, a grouting hole 5.3, a grout outlet 5.4, a plug 5.5 and a grout outlet through hole 5.6;

high-strength grouting material 6;

a bottom headbox 7;

the grouting device comprises a preset grouting device 8, a vertical grout storage tank 8.1, a grouting block 8.2 and a supporting piece 8.3.

Detailed Description

To make the objects, technical solutions and advantages of embodiments of the present invention clearer, the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, not all embodiments. Based on the embodiments in the embodiment, other embodiments obtained by those skilled in the art without any creative work belong to the protection scope of the present invention.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present solution, and are not construed as limiting the present solution.

These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "a plurality" means one or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as fixed or removable connections or integral parts, either mechanically or electrically, or in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The first embodiment is as follows: as shown in fig. 1, 2 and 3, the vertical connection structure of the sleeve-type prefabricated underground continuous wall with the pre-embedded front and rear rows of steel bars comprises a lower prefabricated underground continuous wall 1, an upper prefabricated underground continuous wall 2, a front row of vertical connection assemblies 3a, a rear row of vertical connection assemblies 3b and a horizontal seam sealing structure 4. The upper prefabricated underground continuous wall is supported on the top surface of the lower prefabricated underground continuous wall.

The front row of vertical connecting assemblies 3a comprise a plurality of vertical connecting assemblies 3 which are sequentially distributed along the length direction of the underground diaphragm wall at equal intervals. The back row of vertical connecting components 3b include a plurality of vertical connecting components 3 that distribute along underground continuous wall length direction equidistance in proper order. In this embodiment, the front row of vertical coupling assembling is close to the foundation ditch outside, and back row of vertical coupling assembling is close to the foundation ditch inboard. The vertical connecting assembly 3 is used for connecting the lower prefabricated underground continuous wall with the upper prefabricated underground continuous wall. Adopt front-seat vertical coupling assembling and back row vertical coupling assembling to connect prefabricated underground continuous wall of next breadth and prefabricated underground continuous wall of last breadth, compare single vertical coupling assembling's connected mode, front and back double vertical coupling assembling's connection is more reliable, and intensity is higher, and the atress performance is better, can satisfy bigger shear force and moment of flexure effect, makes the continuous application scope in prefabricated underground wider.

As shown in fig. 1, 5 and 6, the vertical connection assembly 3 comprises a lower embedded connection column 3.1 embedded at the top of the lower prefabricated underground continuous wall, an upper embedded connection column 3.3 embedded in the upper prefabricated underground continuous wall and a positioning sleeve 3.2. In this embodiment, the axes of the lower pre-buried connecting column, the upper pre-buried connecting column and the positioning sleeve are vertically distributed. The upper end of the upper embedded connecting column is positioned above the positioning sleeve. The lower end of the upper embedded connecting column is inserted into the positioning sleeve through the upper port of the positioning sleeve. The lower port of the positioning sleeve is positioned at the bottom of the upper prefabricated underground continuous wall, and an insertion hole for inserting the lower embedded connecting column is formed at the bottom of the upper prefabricated underground continuous wall. The upper end of the lower embedded connecting column is inserted into the positioning sleeve through the lower port of the positioning sleeve. In this embodiment, the internal diameter of positioning sleeve is greater than the external diameter of pre-buried spliced pole down, and specifically, positioning sleeve's internal diameter is 30 millimeters bigger than the external diameter of pre-buried spliced pole down. The inner cavity of the positioning sleeve is filled with high-strength grouting material, namely, the gap between the inner side surface of the positioning sleeve and the lower embedded connecting column and the gap between the inner side surface of the positioning sleeve and the upper embedded connecting column are filled with high-strength grouting material. In this embodiment, lower pre-buried spliced pole is the reinforcing bar post with last pre-buried spliced pole, and the position sleeve is the reinforcing bar sleeve.

The vertical coupling assembling of this embodiment adopts vertical coupling assembling, in the embedded spliced pole stretches into the position sleeve on adopting, fix a position the position sleeve, and stretch into the position sleeve and adopt the grout that excels in to fill at the inner chamber of position sleeve through embedded spliced pole down, it is as an organic whole to realize being connected prefabricated underground continuous wall of lower panel and prefabricated underground continuous wall of upper panel, compare with the blind hole type connection of reserve reinforcing bar, its joint strength is high, the atress performance is better, wholeness, the reliability is better, can satisfy wall body bending resistance and shearing requirement.

As shown in fig. 1 and 4, the horizontal joint sealing structure 4 includes an upper wall interface 4.2 formed by the bottom surface of the upper prefabricated underground continuous wall (i.e., the upper wall interface formed by the bottom surface of the upper prefabricated underground continuous wall), a lower wall interface 4.1 formed by the top surface of the lower prefabricated underground continuous wall (i.e., the lower wall interface formed by the top surface of the lower prefabricated underground continuous wall), two grout leakage preventing sealant strips 4.3 located between the upper wall interface and the lower wall interface, a grouting cavity 4.4 formed between the two grout leakage preventing sealant strips, and a high-strength grouting material filled in the grouting cavity. In this embodiment, the strength grade of the high-strength grouting material is greater than 60 MPa. Two slurry leakage prevention sealing rubber strips are connected with an upper wall interface and a lower wall interface in a sealing mode, and high-strength grouting material is connected with the upper wall interface and the lower wall interface in a sealing mode. The horizontal joint sealing structure of the embodiment adopts two slurry leakage prevention sealing rubber strips and high-strength grouting material to connect the upper wall interface and the lower wall interface in a sealing manner, and the slurry leakage prevention sealing rubber strips are compact under the action of gravity of the upper underground diaphragm wall, so that the high-strength grouting material is compact, the sealing performance of the upper wall interface and the lower wall interface is good, the water stopping is reliable and high, and the requirements of water leakage prevention and water stopping can be met.

More importantly, as shown in fig. 1, due to the limitation of the manufacturing precision of the prefabricated underground continuous wall, the inner diameter of the positioning sleeve is at least 30mm larger than the diameter of the lower embedded connecting column, so that when the installation is ensured, each lower embedded connecting column can be smoothly inserted into the corresponding positioning sleeve, but in this way, a gap exists between the positioning sleeve and the lower embedded connecting column, the soil and water pressure outside the foundation pit acts on the prefabricated underground continuous wall in the excavation process of the foundation pit, and because the gap exists between the positioning sleeve and the lower embedded connecting column, horizontal dislocation is easily generated between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall until the lower embedded connecting column abuts against the side wall of the positioning sleeve, so that the horizontal seam sealing structure is damaged, and the sealing structure between the interface of the upper wall and the interface of the lower wall is damaged, and the problem of water leakage occurs; therefore, the scheme fills the high-strength grouting material in the gap between the positioning sleeve and the lower embedded connecting column to eliminate the gap between the positioning sleeve and the lower embedded connecting column, so that the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall are stably and reliably connected into a whole, and the problem of water leakage caused by the fact that the sealing structure between the upper prefabricated underground continuous wall interface and the lower prefabricated underground continuous wall interface is damaged due to the fact that the gap exists between the positioning sleeve and the lower embedded connecting column and horizontal dislocation is easily caused between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall is avoided.

In the embodiment, the diameter of the upper embedded connecting column is more than 20mm, and the grade of the steel bar is higher than HRB 400; the diameter of the lower embedded connecting column is larger than 20mm, and the grade of the steel bar is higher than HRB 400.

Further, as shown in fig. 1, 2 and 3, the thickness of the lower prefabricated underground continuous wall is the same as that of the upper prefabricated underground continuous wall. The interval between the vertical coupling assembling of front stall and the vertical coupling assembling of back is less than half of the thickness of prefabricated underground continuous wall of lower panel, and in this embodiment, the thickness of prefabricated underground continuous wall of lower panel and the prefabricated underground continuous wall of upper panel is 1200 millimeters, and the interval between vertical coupling assembling of front stall and the vertical coupling assembling of back is 400 millimeters.

Further, as shown in fig. 2, the vertical connecting assemblies of the front row of vertical connecting assemblies 3a and the vertical connecting assemblies of the rear row of vertical connecting assemblies 3b are distributed in parallel; alternatively, as shown in fig. 3, the vertical connecting assemblies of the front row of vertical connecting assemblies 3a and the vertical connecting assemblies of the rear row of vertical connecting assemblies 3b are distributed in a staggered manner.

Further, as shown in fig. 1 and 6, the vertical connection structure of the sleeve-type prefabricated underground continuous wall with the pre-embedded front and rear rows of steel bars further comprises a grouting structure. The side wall of each positioning sleeve 3.2 is provided with a grouting opening 5.1 and a grout outlet 5.2, and the grouting opening is positioned below the grout outlet. The grouting structure corresponds to the vertical connecting assemblies one by one. The grouting structure comprises grouting holes 5.3 and grout outlet holes 5.4 which are arranged on the side surfaces of the upper prefabricated underground continuous wall, the grouting holes are communicated with the corresponding grouting ports, and the grout outlet holes are communicated with the corresponding grout outlet ports. The grouting hole, the grouting opening, the inner cavity of the positioning sleeve, the grout outlet and the grout outlet form a grouting channel together. The grouting hole is used for injecting high-strength grouting material, and the high-strength grouting material is filled in the inner cavity of the positioning sleeve. The grouting hole is located below the grout outlet, and high-strength grouting material is injected through the grouting hole, so that the high-strength grouting material is favorable for filling a grouting channel, the gap between the positioning sleeve and the lower embedded connecting column and the gap between the positioning sleeve and the upper embedded connecting column are guaranteed to be filled by the high-strength grouting material, the phenomenon that the gap between the positioning sleeve and the lower embedded connecting column is filled with a cavity to influence the connection strength, horizontal dislocation is easily generated between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall, and the sealing structure between the upper wall interface and the lower wall interface is damaged is avoided.

In this embodiment, the grout holes and the grout outlet holes of each grouting structure are all arranged on the same side surface of the upper prefabricated underground continuous wall.

Further, as shown in fig. 1 and 4, a sealant 4.5 is further provided at the gap of the edge between the interface of the upper panel wall and the interface of the lower panel wall to seal the gap of the edge between the interface of the upper panel wall and the interface of the lower panel wall. In this embodiment, the thickness of the sealant is greater than 10 mm. Thus, the sealing reliability between the upper panel wall interface and the lower panel wall interface can be further improved.

Further, as shown in fig. 1, 5 and 6, the lower prefabricated underground continuous wall includes lower wall concrete, and lower wall vertical ribs and lower wall horizontal distribution ribs embedded in the lower wall concrete. In this embodiment, the lower prefabricated underground continuous wall is a factory prefabricated component. The upper prefabricated underground continuous wall comprises upper wall concrete and horizontal distribution ribs which are embedded in the vertical ribs of the upper wall and the upper wall. In this embodiment, the prefabricated underground continuous wall of upper panel is the prefabricated component of batch production.

Further, as shown in fig. 1 and 5, two mounting grooves 4.6 are formed in the top surface of the lower prefabricated underground continuous wall, the mounting grooves extend along the length direction of the underground continuous wall, two slurry leakage prevention sealing rubber strips are in one-to-one correspondence with the mounting grooves, and the slurry leakage prevention sealing rubber strips are embedded in the corresponding mounting grooves. So in the actual construction of being convenient for, installation leak protection thick liquid joint strip.

Further, as shown in fig. 1 and 3, a bottom head tank 7 is further arranged on the bottom surface of the upper prefabricated underground continuous wall, and the lower end of the positioning sleeve is communicated with the bottom head tank. Therefore, after the upper prefabricated underground continuous wall is supported on the top surface of the lower prefabricated underground continuous wall, one part of the high-strength grouting material in the grouting cavity between the two anti-leakage sealing rubber strips is pressed into the bottom pulp flowing groove, and after the high-strength grouting material is cured, the sealing performance between the upper wall interface and the lower wall interface can be further improved, and the structural strength between the upper wall interface and the lower wall interface can be improved.

The concrete construction steps of the vertical connection structure of the sleeve-type prefabricated underground continuous wall with the pre-buried front and rear rows of steel bars in the embodiment are as follows: after the lower prefabricated underground continuous wall is buried in a soil layer, the buried top surface of the lower prefabricated underground continuous wall is positioned above the ground surface, roughening treatment is carried out on the interface of the lower prefabricated underground continuous wall, and an interface agent is brushed after roughening treatment; secondly, embedding the two anti-leakage sealing rubber strips in the corresponding mounting grooves, and then filling high-strength grouting material in a grouting cavity formed between the two anti-leakage sealing rubber strips; thirdly, roughening the interface of the upper prefabricated underground continuous wall, namely roughening, brushing an interface agent after roughening, then positioning the upper prefabricated underground continuous wall in place to align the positioning sleeve with the lower embedded connecting column, supporting the upper prefabricated underground continuous wall on the top surface of the lower prefabricated underground continuous wall, and inserting the lower embedded connecting column into the corresponding positioning sleeve; filling high-strength grouting material in the positioning sleeve through the grouting hole, so that the gap between the inner side surface of the positioning sleeve and the lower embedded connecting column and the gap between the inner side surface of the positioning sleeve and the upper embedded connecting column are filled with the high-strength grouting material; and fifthly, constructing sealant at the gap of the edge between the interface of the upper wall and the interface of the lower wall, and connecting the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall into a whole.

In a second embodiment, the remaining structure of the present embodiment refers to the first embodiment, and the difference therebetween is that:

as shown in fig. 7, the grouting hole 5.3 extends obliquely upwards from the grouting opening 5.1. In this embodiment, through the grout hole pouring into high strength grouting material, the concrete construction step of filling high strength grouting material in the space between the position sleeve and the lower pre-buried spliced pole includes: firstly, filling a plurality of steel balls into a grouting hole; secondly, high-strength grouting material is poured into the grouting hole, so that the high-strength grouting material and the steel balls in the grouting hole are filled into the inner cavity of the positioning sleeve together; the steel balls are used for filling gaps between the inner side face of the positioning sleeve and the lower embedded connecting column and gaps between the inner side face of the positioning sleeve and the upper embedded connecting column, so that water and soil pressure acting on the bottom of the upper prefabricated underground continuous wall can act on the lower embedded connecting column through the steel balls.

In the embodiment, the grouting hole is obliquely extended upwards from the positioning sleeve, so that steel balls can be conveniently filled into the grouting hole, the steel balls fall into the positioning sleeve along the grouting hole to pre-fill gaps existing in the positioning sleeve below the grouting opening, air in the gaps is discharged as much as possible, and after high-strength grouting material is pressed in from the grouting hole, the inner cavity of the positioning sleeve below the grouting opening can be favorably filled, and the structural strength is improved; more importantly, the high-strength grouting material and the steel balls in the grouting holes are filled into the positioning sleeve together, so that the steel balls are used for filling a gap between the inner side surface of the positioning sleeve and the lower embedded connecting column and a gap between the inner side surface of the positioning sleeve and the upper embedded connecting column, and water and soil pressure acting on the bottom of the upper prefabricated underground continuous wall can act on the lower embedded connecting column through the steel balls, so that the structural strength between the upper prefabricated underground continuous wall and the lower embedded connecting column is further effectively improved, horizontal dislocation between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall is avoided, and the sealing structure between the interface of the upper prefabricated underground continuous wall and the interface of the lower prefabricated underground continuous wall is damaged.

Further, as shown in fig. 7, a plug 5.5 is arranged in the grout outlet 5.4, and a plurality of grout outlet through holes 5.6 are arranged on the plug. The inner diameter of the grout outlet is smaller than the diameter of the steel ball, so that the high-strength grouting material can overflow from the grout outlet, and the steel ball is left in the grouting channel. Therefore, after the high-strength grouting material is pressed in through the grouting hole, the high-strength grouting material can overflow from the grouting through hole, the steel balls are left in the grouting channel, so that the gaps between the positioning sleeve and the lower embedded connecting column and the gaps between the positioning sleeve and the upper embedded connecting column are filled with the steel balls, and the gaps between the steel balls are filled with the high-strength grouting material, so that the structural strength between the upper prefabricated underground continuous wall and the lower embedded connecting column is further effectively improved, horizontal dislocation between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall is avoided, and the sealing structure between the upper wall interface and the lower wall interface is damaged.

In the concrete construction process, if the steel balls filled into the grouting holes at one time cannot fill the gaps in the inner cavities of the positioning sleeves, the high-strength grouting material can be injected through the grouting holes, and the first step and the second step in the construction step of filling the high-strength grouting material in the gaps between the positioning sleeves and the lower embedded connecting columns are repeated until the gaps in the inner cavities of the positioning sleeves are filled with the high-strength grouting material, so that the gaps between the positioning sleeves and the lower embedded connecting columns and the gaps between the positioning sleeves and the upper embedded connecting columns are filled with the steel balls, and the gaps between the steel balls are filled with the high-strength grouting material.

In a third embodiment, the remaining structure of the present embodiment refers to the first embodiment, and the difference therebetween is that:

as shown in fig. 8 and 9, the vertical connection structure of the sleeve-type prefabricated underground continuous wall with the pre-embedded front and rear rows of steel bars further comprises a pre-arranged grouting device 8. The preset grouting device comprises a vertical grout storage tank 8.1 preset on the top surface of the lower prefabricated underground continuous wall 1, a grouting block 8.2 matched with the vertical grout storage tank and a support member 8.3 arranged on the side surface of the grouting block. The vertical grout storage groove is filled with high-strength grouting material, the grouting block is supported on the top surface of the lower prefabricated underground continuous wall through the supporting piece, the lower end of the grouting block extends into the vertical grout storage groove, a gap is formed between the side surface of the grouting block and the side wall of the vertical grout storage groove, and a grout outlet channel is formed in the gap. In this embodiment, the supporting member is a plastic member, and the pressing block is a metal block. After the upper prefabricated underground continuous wall is supported on the top surface of the lower prefabricated underground continuous wall, the bottom surface of the upper prefabricated underground continuous wall breaks the supporting piece, and presses the grouting block into the vertical grout storage groove, so that the high-strength grouting material in the vertical grout storage groove overflows to the grouting cavity from the grout outlet channel and is filled into the bottom head flow groove, and all or part of inner cavities in the bottom head flow groove are filled. Therefore, in the process that the high-strength grouting material in the vertical grout storage groove overflows from the grout outlet channel to the grouting cavity and is filled into the bottom flow pulp groove, the high-strength grouting material in the grouting cavity can be stirred to break air bubbles in the high-strength grouting material in the grouting cavity, so that the high-strength grouting material in the grouting cavity is compactly filled in the grouting cavity, and the sealing performance between the upper wall interface and the lower wall interface is improved; meanwhile, after the high-strength grouting material is cured, the cured high-strength grouting material can be formed in the bottom slurry flow groove, so that the sealing performance between the upper wall interface and the lower wall interface and the structural strength between the upper wall interface and the lower wall interface are further improved.

Furthermore, the number of the preset grouting devices is multiple, and the preset grouting devices are sequentially distributed at equal intervals along the length direction of the underground continuous wall.

The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and equivalent transformation of doing above embodiment the utility model discloses technical scheme's protection scope.

Claims (8)

1. The utility model provides a vertical connection structure of telescopic prefabricated underground continuous wall of row's reinforcing bar around pre-buried, includes prefabricated underground continuous wall of lower panel and supports the prefabricated underground continuous wall of upper panel on the top surface of prefabricated underground continuous wall of lower panel, characterized by still includes:

the horizontal joint sealing structure comprises an upper wall interface formed by the bottom surface of an upper prefabricated underground continuous wall, a lower wall interface formed by the top surface of a lower prefabricated underground continuous wall, two anti-leakage sealing rubber strips positioned between the upper wall interface and the lower wall interface, a grouting cavity formed between the two anti-leakage sealing rubber strips and a high-strength grouting material filled in the grouting cavity, wherein the two anti-leakage sealing rubber strips are connected with the upper wall interface and the lower wall interface in a sealing manner, and the high-strength grouting material is connected with the upper wall interface and the lower wall interface in a sealing manner;

the front-row vertical connecting assemblies comprise a plurality of vertical connecting assemblies which are sequentially distributed along the length direction of the underground continuous wall;

the rear-row vertical connecting assemblies comprise a plurality of vertical connecting assemblies which are sequentially distributed along the length direction of the underground continuous wall;

vertical coupling assembling is used for connecting prefabricated underground continuous wall of lower panel and prefabricated underground continuous wall of upper panel, and vertical coupling assembling includes pre-buried spliced pole, pre-buried spliced pole and the position sleeve on pre-buried in the prefabricated underground continuous wall of upper panel under pre-buried lower panel's top of pre-buried spliced pole, goes up the upper end of pre-buried spliced pole and is located position sleeve's top, goes up in pre-buried spliced pole's lower extreme is inserted position sleeve by position sleeve's last port, and position sleeve's lower port is located the bottom of prefabricated underground continuous wall of upper panel, in the upper end of pre-buried spliced pole is inserted position sleeve by position sleeve's lower port down, position sleeve's inner chamber adopts the grout that excels in.

2. The vertical connecting structure of the pre-buried front and rear steel bar sleeve type prefabricated underground continuous wall as claimed in claim 1, wherein the front row of vertical connecting components are close to the outer side of the foundation pit, and the rear row of vertical connecting components are close to the inner side of the foundation pit.

3. The vertical connecting structure of the pre-buried front and rear steel bar sleeve type prefabricated underground continuous wall as claimed in claim 1, wherein the vertical connecting assemblies of the front row of vertical connecting assemblies and the vertical connecting assemblies of the rear row of vertical connecting assemblies are distributed in parallel or in a staggered manner.

4. The vertical connection structure of the pre-buried front and rear steel bar sleeve type prefabricated underground continuous wall as claimed in claim 1, 2 or 3, wherein the thickness of the lower prefabricated underground continuous wall is the same as that of the upper prefabricated underground continuous wall, and the distance between the front row vertical connection assembly and the rear row vertical connection assembly is less than half of the thickness of the lower prefabricated underground continuous wall.

5. The vertical connection structure of the pre-buried front and rear row steel bar sleeve type prefabricated underground continuous wall as claimed in claim 1, 2 or 3, and is characterized by further comprising a grouting structure, wherein a grouting opening and a grout outlet are formed in the side wall of the positioning sleeve, the grouting opening is located below the grout outlet, the grouting structure comprises a grouting hole and a grout outlet, the grouting hole is formed in the side face of the upper prefabricated underground continuous wall and communicated with the grouting opening, the grout outlet is communicated with the grout outlet, the grouting hole, the grouting opening, the inner cavity of the positioning sleeve, the grout outlet and the grout outlet form a grouting channel together, the grouting hole is used for injecting high-strength grouting material, and the high-strength grouting material is filled in the inner cavity of the positioning sleeve.

6. The vertical connecting structure of the pre-buried front and rear steel bar sleeve type prefabricated underground continuous wall as claimed in claim 1, 2 or 3, wherein a bottom head flowing groove is further arranged on the bottom surface of the upper prefabricated underground continuous wall, and the lower port of the positioning sleeve is communicated with the bottom head flowing groove.

7. The vertical connection structure of the pre-buried sleeve-type prefabricated underground continuous wall with the front and rear rows of steel bars as claimed in claim 1, 2 or 3, wherein a sealant is further arranged at a gap of an edge between an interface of the upper wall and an interface of the lower wall to seal the gap of the edge between the interface of the upper wall and the interface of the lower wall.

8. The vertical connection structure of the sleeve type prefabricated underground continuous wall with the embedded front and rear rows of steel bars as claimed in claim 1, 2 or 3, wherein the strength grade of the high-strength grouting material is more than 60 MPa.

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