CN211713948U - Vertical connection structure of prefabricated underground continuous wall of buried bolt formula in advance - Google Patents

Abstract

The utility model discloses a vertical connection structure of prefabricated underground continuous wall of buried bolt formula in advance aims at providing a joint strength height, wholeness is good, can satisfy wall body bending resistance and the requirement of shearing, and the leakproofness is good simultaneously, can satisfy the prefabricated underground continuous wall of buried bolt formula in advance vertical connection structure of the requirement of prevention of seepage stagnant water. It includes a lower prefabricated underground continuous wall; prefabricating an underground continuous wall on the upper part; the vertical connecting assembly is used for connecting the lower prefabricated underground continuous wall with the upper 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 high-strength grouting materials filled in the grouting cavity.

Description

Vertical connection structure of prefabricated underground continuous wall of buried bolt formula in advance

Technical Field

The utility model relates to a prefabricated underground continuous wall, concretely relates to vertical connection structure of prefabricated underground continuous wall of buried bolt formula in advance.

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 prefabricated underground continuous wall vertical connection structure of buried bolt formula in advance of the requirement of prevention of seepage stagnant water.

The technical scheme of the utility model is that:

a vertical connecting structure of a pre-buried bolt type prefabricated underground continuous wall comprises a lower prefabricated underground continuous wall; the vertical connecting assembly comprises pre-buried connecting studs pre-buried at the top of the lower prefabricated underground continuous wall, nuts in threaded fit with the pre-buried connecting studs, nut mounting openings arranged at the lower part of the side face of the upper prefabricated underground continuous wall and positioning connecting holes arranged on the bottom surface of the upper prefabricated underground continuous wall and communicated with the nut mounting openings, the upper ends of the pre-buried connecting studs penetrate through the positioning connecting holes and extend into the nut mounting openings, the nuts are positioned in the nut mounting openings, and gaps between the positioning connecting holes and the pre-buried connecting studs are filled with high-strength grouting materials; 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 mode, and the high-strength grouting material is connected with the upper wall interface and the lower wall interface in a sealing mode.

The vertical connecting component in the vertical connecting structure of the embedded bolt type prefabricated underground continuous wall adopts the embedded connecting stud to be matched with the positioning connecting hole and locked and fixed through the nut, so that the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall are connected into a whole; the horizontal seam seal structure in the vertical connection structure of the embedded bolt type prefabricated underground continuous wall adopts two sealing rubber strips for preventing slurry leakage and high-strength grouting material to connect the upper wall interface and the lower wall interface, and the sealing rubber strips for preventing slurry leakage 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 higher, and the requirements of preventing seepage and stopping water 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 connecting hole is at least 30mm larger than the diameter of the embedded connecting stud, so that the installation can be ensured, each embedded connecting stud can be smoothly inserted into the corresponding positioning connecting hole, but in this way, a gap exists between the positioning connecting hole and the embedded connecting stud, 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 connecting hole and the embedded connecting stud, horizontal dislocation is easily generated between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall until the embedded connecting stud abuts against the side wall of the positioning connecting hole, 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 connecting hole and the embedded connecting stud to eliminate the gap between the positioning connecting hole and the embedded connecting stud, 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 that water leakage occurs because the gap exists between the positioning connecting hole and the embedded connecting stud and horizontal dislocation is easily caused between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall, and the sealing structure between the interface of the upper wall and the interface of the lower wall is damaged is solved.

On the other hand, measures such as pre-burying a connecting stud and a nut mounting port are convenient for factory customization of components, the prefabrication degree is high, and the field construction is convenient. The connecting bolts and the bolt holes can also be used for positioning, so that the accurate positioning of the upper and lower underground continuous walls and the smooth wall surface are ensured.

Preferably, the prefabricated underground continuous wall further comprises a grouting structure, the grouting structure comprises a grouting hole which is arranged on the side face of the upper prefabricated underground continuous wall and communicated with the positioning connecting hole, the grouting hole is located below the screw cap mounting port, a grouting channel is formed by the grouting hole, a gap between the positioning connecting hole and the embedded connecting stud and the screw cap mounting port, the grouting hole is used for injecting high-strength grouting material, and the high-strength grouting material is filled in the gap between the positioning connecting hole and the embedded connecting stud. The grouting holes are located below the nut mounting openings, and high-strength grouting materials are injected through the grouting holes, so that the high-strength grouting materials can be used for filling the grouting passages, the gaps between the positioning connecting holes and the embedded connecting studs can be guaranteed to be filled with the high-strength grouting materials, the phenomenon that the gaps between the positioning connecting holes and the embedded connecting studs are hollow and the connection strength is affected, horizontal dislocation is easily caused between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall, 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 is avoided.

Preferably, a bottom head pulp groove is further formed in the bottom face of the upper prefabricated underground continuous wall, and the lower end of the positioning connecting hole is communicated with the bottom head pulp groove. 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, the embedded connecting studs are distributed in sequence along the length direction of the underground continuous wall, the distance between every two adjacent embedded connecting studs is smaller than 400 mm, the positioning connecting holes correspond to the embedded connecting studs one to one, and the nut mounting openings correspond to the positioning connecting holes one to one. So, can guarantee joint strength, wholeness and reliability after prefabricated underground continuous wall of lower panel and the prefabricated underground continuous wall of upper panel are connected as an organic whole, satisfy wall body bending resistance and the requirement of shearing.

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, 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 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 prefabricated underground continuous wall of upper panel includes upper panel wall concrete, pre-buries at the vertical muscle of upper panel wall and upper panel wall horizontal distribution muscle, the hidden roof beam is buried underground in advance to the bottom of upper panel wall concrete, and the hidden roof beam includes hidden roof beam owner muscle, encircles the hidden roof beam stirrup outside hidden roof beam owner muscle and distributes at the hidden roof beam horizontal distribution muscle in the hidden roof beam stirrup outside. The hidden beam is additionally arranged at the bottom of the upper wall, and the hidden beam main ribs, the hidden beam stirrups and the hidden beam horizontal distribution ribs are added in the range of the hidden beam, so that the rigidity and the strength of the position of the upper prefabricated underground continuous joint are greatly enhanced, and the concrete is prevented from being crushed.

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

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 vertical connecting component in the vertical connecting structure of the embedded bolt type prefabricated underground continuous wall adopts the embedded connecting stud to be matched with the positioning connecting hole and is locked and fixed through the nut, so that the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall are connected into a whole; the horizontal seam seal structure in the vertical connection structure of the embedded bolt type prefabricated underground continuous wall adopts two slurry leakage prevention sealing rubber strips and a high-strength grouting material to connect an upper wall interface and a lower wall interface, and the slurry leakage prevention sealing rubber strips are compact under the action of gravity of the upper underground continuous wall, the high-strength grouting material is compact, so that the upper wall interface and the lower wall interface have good sealing performance, the water stop is reliable and high, and the requirements of water leakage 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 connecting hole is at least 30mm larger than the diameter of the embedded connecting stud, so that the installation can be ensured, each embedded connecting stud can be smoothly inserted into the corresponding positioning connecting hole, but in this way, a gap exists between the positioning connecting hole and the embedded connecting stud, 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 connecting hole and the embedded connecting stud, horizontal dislocation is easily generated between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall until the embedded connecting stud abuts against the side wall of the positioning connecting hole, 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 connecting hole and the embedded connecting stud to eliminate the gap between the positioning connecting hole and the embedded connecting stud, 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 that water leakage occurs because the gap exists between the positioning connecting hole and the embedded connecting stud and horizontal dislocation is easily caused between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall, and the sealing structure between the interface of the upper wall and the interface of the lower wall is damaged is solved. On the other hand, measures such as pre-burying a connecting stud and a nut mounting port are convenient for factory customization of components, the prefabrication degree is high, and the field construction is convenient. The connecting bolts and the bolt holes can also be used for positioning, so that the accurate positioning of the upper and lower underground continuous walls and the smooth wall surface are ensured.

Drawings

Fig. 1 is a partial structure schematic diagram of a vertical connection structure of a prefabricated underground continuous wall of embedded bolt formula according to a specific embodiment of the present invention.

Fig. 2 is a partial structural schematic view of a lower prefabricated underground continuous wall according to a first embodiment of the present invention.

Fig. 3 is a partial structural schematic view of an upper prefabricated underground continuous wall according to a first embodiment of the present invention.

Fig. 4 is a schematic view of a partial structure of a lower prefabricated underground continuous wall and an upper prefabricated underground continuous wall according to a first embodiment of the present invention before assembly.

Fig. 5 is a partial structural schematic view of an upper prefabricated underground continuous wall according to a second 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 vertical connecting assembly 3, an embedded connecting stud 3.1, a positioning connecting hole 3.2, a nut mounting hole 3.3, a nut 3.4 and a gasket 3.5;

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;

grouting holes 5;

high-strength grouting material 6;

a bottom headbox 7;

the hidden beam comprises a hidden beam 8, hidden beam main ribs 8.1, hidden beam stirrups 8.2 and hidden beam horizontal distribution ribs 8.3;

vertical steel casing 9.

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, 3 and 4, the vertical connection structure of the embedded bolt type prefabricated underground continuous wall comprises a lower prefabricated underground continuous wall 1, an upper prefabricated underground continuous wall 2, a plurality of vertical connection assemblies 3 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 vertical connecting assembly 3 is used for connecting the lower prefabricated underground continuous wall with the upper prefabricated underground continuous wall. Vertical coupling assembling 3 includes pre-buried connecting screw 3.1 at the prefabricated underground continuous wall's of lower panel top, with pre-buried connecting screw thread fit's nut 3.4, set up at the nut installing port 3.3 of the side lower part of the prefabricated underground continuous wall of upper panel and set up on the bottom surface of the prefabricated underground continuous wall of upper panel and the location connecting hole 3.2 that is linked together with the nut installing port. The upper end of pre-buried connecting stud passes the location connecting hole and stretches into in the nut installing port, and the nut is located the nut installing port, and in this embodiment, vertical coupling assembling distributes along underground continuous wall's length direction in proper order, and each vertical coupling assembling's pre-buried connecting stud distributes along underground continuous wall's length direction in proper order, and the interval between two adjacent pre-buried connecting studs is for in 400 millimeters. The positioning connecting holes are in one-to-one correspondence with the embedded connecting studs, and the nut mounting openings are in one-to-one correspondence with the positioning connecting holes. In this embodiment, the inner diameter of the positioning connection hole is greater than the outer diameter of the embedded connection stud, and specifically, the inner diameter of the positioning connection hole is 30mm greater than the outer diameter of the embedded connection stud. And the gap between the positioning connecting hole and the embedded connecting stud is filled with high-strength grouting material 6. The vertical connection assembly of this embodiment adopts pre-buried connecting stud and locating connection hole cooperation to lead to the nut locking and fixing, be connected as an organic whole with prefabricated underground continuous wall of upper panel with the prefabricated underground continuous wall of lower panel in order to realize, compare with the blind hole type connection of reserve reinforcing bar, its joint strength is high, and the atress performance is better, wholeness, reliability are better, can satisfy wall body bending resistance and shearing requirement.

As shown in fig. 1, 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, a lower wall interface 4.1 formed by the top surface of the lower prefabricated underground continuous wall, two grout leakage preventing sealing rubber strips 4.3 positioned between the upper wall interface and the lower wall interface, a grouting cavity 4.4 formed between the two grout leakage preventing sealing rubber strips, and 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 connection hole should be at least 30mm larger than the diameter of the embedded connection studs, so that it can be ensured that each embedded connection stud can be smoothly inserted into the corresponding positioning connection hole when in installation, but in this way, a gap exists between the positioning connection hole and the embedded connection stud, the soil and water pressure outside the foundation pit will act on the prefabricated underground continuous wall during excavation of the foundation pit, and because a gap exists between the positioning connection hole and the embedded connection studs, horizontal dislocation is easily generated between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall until the embedded connection studs abut against the side wall of the positioning connection hole, so that the horizontal seam sealing structure is destroyed, and the sealing structure between the interface of the upper wall and the interface of the lower wall is destroyed, and the problem of water leakage occurs; therefore, the scheme fills the high-strength grouting material in the gap between the positioning connecting hole and the embedded connecting stud to eliminate the gap between the positioning connecting hole and the embedded connecting stud, 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 that water leakage occurs because the gap exists between the positioning connecting hole and the embedded connecting stud and horizontal dislocation is easily caused between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall, and the sealing structure between the interface of the upper wall and the interface of the lower wall is damaged is solved.

In this embodiment, pre-buried connecting stud diameter is greater than 20mm, and the reinforcing bar mark is higher than HRB400, still overlaps on the pre-buried connecting stud to be equipped with gasket 3.5, and the gasket is located the nut mounting hole, and the gasket is located the below of nut, and the gasket is the metal gasket.

Further, as shown in fig. 1, 2 and 3, the vertical connecting structure of the embedded bolt type prefabricated underground continuous wall further comprises a grouting structure. The grouting structure corresponds to the vertical connecting assemblies one by one. The grouting structure comprises grouting holes 5 which are arranged on the side surface of the upper prefabricated underground continuous wall and communicated with the corresponding positioning connecting holes. The grouting hole is positioned below the screw cap mounting opening. And gaps among the grouting holes, the positioning connecting holes and the embedded connecting studs and the nut mounting openings 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 a gap between the positioning connecting hole and the embedded connecting stud. The grouting holes are located below the nut mounting openings, and high-strength grouting materials are injected through the grouting holes, so that the high-strength grouting materials can be used for filling the grouting passages, the gaps between the positioning connecting holes and the embedded connecting studs can be guaranteed to be filled with the high-strength grouting materials, the phenomenon that the gaps between the positioning connecting holes and the embedded connecting studs are hollow and the connection strength is affected, horizontal dislocation is easily caused between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall, 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 is avoided.

Further, as shown in fig. 1, a sealant 4.5 is further provided at the gap of the 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. 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.

Furthermore, 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. 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.

As shown in fig. 1 and 3, the hidden beam 8 is pre-buried at the bottom of the upper wall concrete, and comprises a hidden beam main rib 8.1, a hidden beam stirrup 8.2 surrounding the hidden beam main rib, and a hidden beam horizontal distribution rib 8.3 distributed outside the hidden beam stirrup. The hidden beam main ribs are distributed at four corners of the rectangle and extend along the length direction of the underground continuous wall. The hidden beam stirrups are distributed along the length direction of the underground continuous wall at equal intervals in sequence, and the hidden beam horizontal distribution reinforcements extend along the length direction of the underground continuous wall. The hidden beam is additionally arranged at the bottom of the upper wall, and the hidden beam main ribs, the hidden beam stirrups and the hidden beam horizontal distribution ribs are added in the range of the hidden beam, so that the rigidity and the strength of the position of the upper prefabricated underground continuous joint are greatly enhanced, and the concrete is prevented from being crushed.

Further, as shown in fig. 1 and 2, 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 connecting hole 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.

As shown in fig. 4, the concrete construction steps of the vertical connection structure of the embedded bolt type prefabricated underground continuous wall 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 enable the positioning connecting holes to be aligned with the embedded connecting studs, supporting the upper prefabricated underground continuous wall on the top surface of the lower prefabricated underground continuous wall, and enabling the embedded connecting studs to be inserted into the corresponding positioning connecting holes; (IV) injecting high-strength grouting material through the grouting holes, filling the high-strength grouting material in gaps between the positioning connecting holes and the embedded connecting studs, and (V) connecting the lower prefabricated underground continuous wall with the upper prefabricated underground continuous wall through locking nuts; and (VI), filling and sealing the reserved nut mounting opening by adopting concrete, and constructing a sealant at a gap of the edge between the upper wall interface and the lower wall interface, so as to finish the integration of the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall.

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. 5, the grouting hole 5 is formed by extending the positioning connection hole obliquely upwards, in this embodiment, a plurality of vertical steel bar sleeves 9 are pre-embedded in the upper prefabricated underground diaphragm wall, the vertical steel bar sleeves correspond to the pre-embedded connection studs one by one, inner cavities of the vertical steel bar sleeves form the positioning connection hole, the side wall of each vertical steel bar sleeve is provided with a grouting opening, and the grouting hole is communicated with the grouting opening.

In this embodiment, the concrete construction steps of injecting the high-strength grouting material through the grouting hole and filling the high-strength grouting material in the gap between the positioning connection hole and the embedded connection stud include: firstly, filling a plurality of steel balls into a grouting hole; secondly, high-strength grouting material is poured into the grouting holes, so that the high-strength grouting material and steel balls in the grouting holes are filled into gaps between the positioning connecting holes and the embedded connecting studs together; the steel balls are used for filling gaps between the positioning connecting holes and the embedded connecting studs, so that water and soil pressure acting on the bottom of the upper prefabricated underground continuous wall can act on the embedded connecting studs through the steel balls. In the embodiment, the grouting hole is obliquely extended upwards from the positioning connecting hole, so that the steel ball is conveniently filled into the grouting hole, falls into the positioning connecting hole along the grouting hole to pre-fill the gap in the positioning connecting hole below the grouting hole, and exhausts the air in the gap as much as possible; more importantly, the high-strength grouting material and the steel balls in the grouting holes are filled into the gaps between the positioning connecting holes and the embedded connecting studs together, so that the steel balls are used for filling the gaps between the positioning connecting holes and the embedded connecting studs, and the water-soil pressure acting on the bottom of the upper prefabricated underground continuous wall can act on the embedded connecting studs through the steel balls, so that the structural strength between the upper prefabricated underground continuous wall and the embedded connecting studs is further effectively improved, the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall are prevented from being horizontally staggered, and the sealing structure between the upper wall interface and the lower wall interface is damaged.

Furthermore, before the high-strength grouting material is poured into the grouting hole, namely in the first step, the gasket is supported on the lower surface of the nut mounting opening, the nut is screwed up, so that the gap between the nut and the gasket is smaller than the diameter of the steel ball, the high-strength grouting material can be ejected out of the upper end opening of the positioning connecting hole, the steel ball is kept in the gap between the positioning connecting hole and the embedded connecting stud, and the gap between the positioning connecting hole and the embedded connecting stud is fully filled. Therefore, after the high-strength grouting material is pressed in through the grouting hole, the steel balls can be filled in the gaps between the positioning connecting hole and the embedded connecting stud, 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 embedded connecting stud is further effectively improved, and the phenomenon that the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall are horizontally staggered to destroy the sealing structure between the upper wall interface and the lower wall interface is avoided.

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

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 prefabricated underground continuous wall of buried bolt formula in advance, 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 vertical connecting assembly is used for connecting the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall and comprises pre-buried connecting studs pre-buried at the top of the lower prefabricated underground continuous wall, nuts in threaded fit with the pre-buried connecting studs, nut mounting openings arranged at the lower parts of the side surfaces of the upper prefabricated underground continuous wall and positioning connecting holes which are arranged on the bottom surface of the upper prefabricated underground continuous wall and communicated with the nut mounting openings, the upper ends of the pre-buried connecting studs penetrate through the positioning connecting holes and extend into the nut mounting openings, the nuts are positioned in the nut mounting openings, and gaps between the positioning connecting holes and the pre-buried connecting studs are filled with high-strength grouting materials;

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 mode, and the high-strength grouting material is connected with the upper wall interface and the lower wall interface in a sealing mode.

2. The vertical connecting structure of the embedded bolt type prefabricated underground continuous wall as claimed in claim 1, which is characterized by further comprising a grouting structure, wherein the grouting structure comprises a grouting hole which is arranged on the side surface of the upper prefabricated underground continuous wall and communicated with the positioning connecting hole, the grouting hole is positioned below the nut mounting port, a grouting channel is formed by the grouting hole, a gap between the positioning connecting hole and the embedded connecting stud and the nut mounting port, the grouting hole is used for injecting high-strength grouting material, and the high-strength grouting material is filled in the gap between the positioning connecting hole and the embedded connecting stud.

3. The vertical connecting structure of the embedded bolt type prefabricated underground continuous wall as claimed in claim 1, wherein a bottom head pulp groove is further formed in the bottom surface of the upper prefabricated underground continuous wall, and the lower end of the positioning connecting hole is communicated with the bottom head pulp groove.

4. The vertical connecting structure of the embedded bolt type prefabricated underground continuous wall as claimed in claim 1, 2 or 3, wherein the embedded connecting studs are sequentially distributed along the length direction of the underground continuous wall, the distance between two adjacent embedded connecting studs is less than 400 mm, the positioning connecting holes are in one-to-one correspondence with the embedded connecting studs, and the nut mounting ports are in one-to-one correspondence with the positioning connecting holes.

5. The vertical connecting structure of the embedded bolt type prefabricated underground continuous wall as claimed in claim 1, 2 or 3, wherein the embedded top surface of the lower prefabricated underground continuous wall is provided with two installation grooves, the installation grooves extend along the length direction of the underground continuous wall, the two slurry leakage prevention sealing rubber strips are in one-to-one correspondence with the installation grooves, and the slurry leakage prevention sealing rubber strips are embedded in the corresponding installation grooves.

6. The vertical connection structure of the embedded bolt type prefabricated underground continuous wall as claimed in claim 1, 2 or 3, wherein a sealant is further provided at the gap of the edge between the interface of the upper wall and the 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.

7. The vertical connecting structure of the embedded bolt type prefabricated underground continuous wall as claimed in claim 1, 2 or 3, wherein the lower prefabricated underground continuous wall comprises lower wall concrete, and lower wall vertical ribs and lower wall horizontal distribution ribs which are embedded in the lower wall concrete.

8. The vertical connection structure of the embedded bolt type prefabricated underground continuous wall as claimed in claim 1, 2 or 3, wherein the upper prefabricated underground continuous wall comprises upper wall concrete, embedded vertical ribs of the upper wall and horizontal distribution ribs of the upper wall, the hidden beams are embedded in the bottom of the upper wall concrete in advance and comprise a plurality of hidden beam main ribs, hidden beam stirrups surrounding the hidden beam main ribs and the hidden beam horizontal distribution ribs distributed outside the hidden beam stirrups.

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