CN216664087U

CN216664087U - Chain prefabricated underground continuous wall

Info

Publication number: CN216664087U
Application number: CN202123436309.XU
Authority: CN
Inventors: 舒佳明; 张芳芳; 明维; 张日红; 邱风雷
Original assignee: Ningbo Zcone High Tech Co ltd
Current assignee: Ningbo Zcone High Tech Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-06-03
Anticipated expiration: 2031-12-28

Abstract

The utility model relates to a chain prefabricated underground continuous wall, which comprises a pile body, wherein the pile body comprises a steel bar assembly for supporting the rigidity of the whole pile body, and the steel bar assembly is embedded in the pile body; grouting grooves for connecting two adjacent pile bodies are buried in the side edges of the pile bodies, the grouting grooves are connected with anchoring steel bars buried in the pile bodies, the grouting grooves are distributed along the axial direction of the pile bodies, and the notches face the outer sides of the pile bodies; the utility model has the beneficial effects that: through set up the slip casting groove at the pile body side, thereby and connect through the slip casting groove between the adjacent pile body and constitute underground diaphragm wall, realize underground diaphragm wall's construction through the mounting method of assembled, have that underground diaphragm wall site operation process is simple, the advantage that the efficiency of construction is high, avoid exposing the emergence of the circumstances such as muscle, swell and can promote the whole security performance of different geological conditions after to underground diaphragm wall construction.

Description

Chain prefabricated underground continuous wall

Technical Field

The utility model belongs to the technical field of underground continuous walls, and particularly relates to a chain prefabricated underground continuous wall.

Background

The underground continuous wall is a foundation engineering, and adopts a trenching machine on the ground, and under the condition of slurry wall protection, a long and narrow deep groove is excavated along the peripheral axis of the deep excavation engineering, after the groove is cleaned, a steel reinforcement cage is hung in the groove, then underwater concrete is poured by using a conduit method to construct a unit groove section, and the steps are carried out section by section, so that a continuous reinforced concrete wall is constructed underground to be used as a structure for intercepting water, preventing seepage, bearing and retaining water. The traditional cast-in-place method has the following defects: 1. the construction quality of the underground continuous wall is difficult to ensure by cast-in-place, and the situations of exposed ribs, bulges and the like are often encountered; 2. the cast-in-place construction is troublesome and labor-consuming, the steel reinforcement cage needs to be hung first, and then concrete is poured, so that the working procedure is complex; 3. when the geological condition is poor, water is easy to leak at the joint of the diaphragm wall, and the overall safety of the foundation pit is affected.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide the chain prefabricated underground continuous wall, so that the underground continuous wall has the advantages of simple field construction process and high construction efficiency.

The utility model aims to solve the technical scheme that the interlocking prefabricated underground continuous wall comprises a pile body, wherein a steel bar assembly for supporting the rigidity of the whole pile body is arranged in the pile body, and the steel bar assembly is buried in the pile body; the side of the pile body is buried underground with the grouting groove used for connecting two adjacent pile bodies, the grouting groove is connected with the anchoring steel bar buried underground in the pile body, and the grouting groove is distributed along the axial direction of the pile body and the notch of the grouting groove faces to the outer side of the pile body.

The utility model has the beneficial effects that: adopt above-mentioned scheme, compare with prior art, through setting up the slip casting groove at the pile body side, thereby connect through the slip casting groove between the adjacent pile body and constitute underground diaphragm wall, realize underground diaphragm wall's construction through the installation of assembled, have that underground diaphragm wall site operation process is simple, the advantage that the efficiency of construction is high, avoid exposing the emergence of the circumstances such as muscle, swell and can promote the whole security performance of different geological conditions after to underground diaphragm wall construction.

Preferably, grouting grooves are respectively embedded in opposite side edges of the pile body, and at least two grouting grooves are embedded in each side edge; the number of grout grooves can be increased according to the side length, the water stopping requirement and the integrity requirement of the pile bodies, so that the stability of the adjacent pile bodies after connection is ensured.

Preferably, the grouting grooves between the adjacent pile bodies realize the connection of the adjacent pile bodies through grouting or through the matching of grouting and inserted connecting pieces; through the grouting connection mode, the water-stopping performance and the structural performance are better, and the use and appearance effects of pile-wall integration can be achieved.

Preferably, the cross section of the grouting groove is in a dovetail groove shape, an I shape or a C shape; through the cross section shape, the adjacent pile bodies are restrained in the front-back direction and the left-right direction and can only move freely in the axial direction.

Preferably, the connecting piece is a reinforcement cage or profile steel matched with the two grouting grooves; so that the connection between the adjacent pile bodies is more stable.

Preferably, the pile body is formed in a centrifugal forming mode, and the cross section of the pile body is externally square and internally circular; not only is the processing and the forming of the pile bodies convenient, but also the connection and the arrangement among the pile bodies are convenient.

Preferably, the end angle of the pile body is in a chamfer shape; the demoulding of the mould is convenient when the pile body is produced.

Preferably, the anchoring steel bar is fixedly bound and connected with the steel bar assembly, one end of the anchoring steel bar is fixedly welded with the wall of the grouting groove, and the other end of the anchoring steel bar extends into the pile body; this makes the grouting groove more stable in the pile body.

Preferably, the steel bar assembly comprises a main bar and a stirrup, the main bar is distributed around the pile body in a surrounding manner along the axial direction of the pile body, and the stirrup is fixedly bound with the main bar along the radial direction of the pile body; the integral rigidity of the pile body is greatly improved.

Preferably, the wall of the grouting groove is connected with a supporting piece for supporting the surrounding purlin through chiseling pile body surface concrete; the connection between the enclosing purlin and the wall body after the underground continuous wall is assembled can be facilitated.

Drawings

Fig. 1 is a schematic view showing a plan structure of an interlocking prefabricated underground diaphragm wall with a dovetail groove type grouting groove according to the present invention.

Fig. 2 is a schematic plan view of the interlocking prefabricated underground continuous wall with an i-shaped grouting groove according to the present invention.

Fig. 3 is a schematic view showing an enlarged plan view of the connection between the interlocked prefabricated underground diaphragm walls of the present invention.

Fig. 4 is a schematic view showing an enlarged plan structure of the connection between the interlocked prefabricated underground continuous walls of the present invention.

Fig. 5 is a schematic plan view showing the construction of the connection between the interlocked prefabricated underground continuous walls of the present invention.

Fig. 6 is a front view structural schematic view of the connection between the interlocked prefabricated underground diaphragm walls of the present invention.

Fig. 7 is a schematic view of the structure of the interlocked prefabricated underground diaphragm walls with supporting members of the present invention.

The reference numbers in the drawings are respectively: 1. a pile body; 2. a reinforcement assembly; 3. anchoring the reinforcing steel bars; 4. a connecting member; 5. a support member; 11. grouting grooves; 12. an end corner; 21. a main rib; 22. hooping; 11-1 and notches.

Detailed Description

The utility model will be described in detail below with reference to the following drawings: as shown in the attached drawings 1 to 6, the pile comprises a pile body 1, wherein a steel bar component 2 for supporting the rigidity of the whole pile body is arranged in the pile body 1, and the steel bar component 2 is embedded in the pile body 1; grouting grooves 11 for connecting two adjacent pile bodies 1 are buried in the side edges of the pile bodies 1, the grouting grooves 11 are connected with anchoring steel bars 3 buried in the pile bodies 1, the grouting grooves 11 are distributed along the axial direction of the pile bodies 1, and the groove openings 11-1 face the outer sides of the pile bodies 1; the grouting groove mainly has the following functions: connect two adjacent chain prefabricated underground continuous walls, also can form a restraint passageway simultaneously and guarantee that two adjacent chain prefabricated underground continuous walls are from side to side, the front and back hug closely each other, guarantee that the plane is neat, the gap is homogeneous, and the slip casting can form an organic whole and guarantee the effect of wholeness and stagnant water after the construction is accomplished.

Grouting grooves 11 are buried in opposite sides of the pile body 1, for example: the cross section of the pile body 1 is of a rectangular structure, the chain prefabricated underground continuous walls only need to be attached to each other from left to right, and the grouting grooves 11 in the pile body 1 only need to be arranged on the two opposite sides from left to right, and if the chain prefabricated underground continuous walls are attached to each other from left to right and from front to back, each side of the grouting grooves 11 in the pile body 1 needs to be arranged; and each side edge is at least embedded with two grouting grooves 11, so that the number of the grouting grooves can be increased according to the side length, the water stop requirement and the integrity requirement of the chain prefabricated underground continuous wall.

The construction method for forming the whole underground continuous wall by the chain prefabricated underground continuous wall comprises the following steps: the chain prefabricated underground continuous wall construction can adopt the construction methods of hammering, static pressure, middle digging, static drilling root planting, TRD and the like for construction, the main functions of the chain prefabricated underground continuous wall are used for replacing the prior cast-in-place underground continuous wall, the flatness and the continuity between the chain prefabricated underground continuous walls are required to be ensured in the construction process of the chain prefabricated underground continuous wall, after one pile is constructed, the shape of the chain prefabricated underground continuous wall is consistent with the shape of a grouting groove, the section steel with slightly smaller size is inserted into the grouting groove of the chain prefabricated underground continuous wall to be constructed, meanwhile, the other side of the section steel is inserted into the grouting groove of the chain prefabricated underground continuous wall which is constructed, the restraint is established between the chain prefabricated underground continuous wall which is not constructed and the chain prefabricated underground continuous wall which is constructed, the position relation of the chain prefabricated underground continuous wall after construction is ensured, and the section steel which is mutually linked is also slowly inserted along with the pile sinking of the chain prefabricated underground continuous wall, the restraint of the chain prefabricated underground continuous walls from top to bottom is guaranteed, the restraint is uniform in the front direction, the rear direction, the left direction and the right direction, the freedom degree of vertical movement only exists in the axial direction, and the flatness of the planes of the chain prefabricated underground continuous walls and the uniformity of gaps among the chain prefabricated underground continuous walls are guaranteed after the construction of the chain prefabricated underground continuous walls is completed. After the construction is finished, the section steel can be pulled out, and the section steel can be pulled out at intervals after a plurality of piles are constructed according to the soil condition of a construction site and then put into the next construction for use, if the section steel is sufficient and the site is small, the section steel for guiding and positioning can be pulled out after the construction is finished. The profile steel has the main functions of guiding and positioning to form restraint in the chain prefabricated underground continuous walls, and the flatness of the chain prefabricated underground continuous walls in construction, the uniformity and the continuity of gaps among the chain prefabricated underground continuous walls and the like are guaranteed.

The grouting grooves 11 between the adjacent pile bodies 1 realize the connection of the adjacent pile bodies 1 through grouting or through the matching of grouting and the inserted connecting piece 4; the connecting piece 4 is a reinforcement cage or profile steel matched with the two grouting grooves 11; the grouting material is any one of cement paste, cement mortar, UPHC, epoxy resin, fine aggregate concrete, fiber mortar, fiber concrete and the like; the grouting material has the requirements of better shearing resistance, water stopping performance, fluidity, compactness, cohesiveness, strength, durability, oxidation resistance, no dry shrinkage and the like.

Grouting in a grouting groove after the construction of the pile materials of the chain prefabricated underground continuous wall is finished, so that the mutual connection between piles is ensured, and the integrity between piles, the water stopping performance between piles and the like are ensured; under the condition of extremely high integrity requirement, a reinforcement cage or profile steel with a corresponding shape can be inserted into the grouting groove first, and then grouting materials are injected; the grouting material and the inserting material can be set in length according to actual stress and water stop requirements, can be fully filled in the whole pile length, and can also be partially filled in the pile length according to requirements; meanwhile, partial hole sites can be selected for grouting according to actual needs by each connecting surface grouting groove. After the construction is completed, the outer surface is smooth, the gap between the piles is uniform, dense grouting materials are arranged, and the use and appearance effects of pile-wall integration can be achieved by better water stopping performance and better structural performance.

The cross section of the grouting groove 11 is in a dovetail groove shape, an I shape or a C shape; through the cross section shape, the adjacent pile bodies are restrained in the front-back direction and the left-right direction and can only move freely in the axial direction, and the material of the grouting groove 11 can be any one of steel, prefabricated UHPC, rigid plastic, aluminum profiles and the like.

The pile body 1 is formed in a centrifugal forming mode, the cross section of the pile body 1 is square outside and circular inside, and the shape of the pile body can be square, rectangular, hexagonal with a slightly raised middle part and the like.

The end angle 12 of the pile body 1 is in a chamfer shape; for example, four end corners of the pile body 1 with the square or rectangular cross section are chamfered, and the chamfer can be an inclined chamfer or an arc chamfer, so that the mould is conveniently demoulded during the production of the pile body.

The anchoring steel bar 3 is fixedly bound and connected with the steel bar component 2, one end of the anchoring steel bar 3 is fixedly welded with the wall of the grouting groove 11, and the other end of the anchoring steel bar extends into the pile body 1; the anchoring steel bars are used for connecting the grouting grooves with the pile body structure, and the integrity of the grouting grooves and the pile body is guaranteed.

The steel bar component 2 comprises a main bar 21 and a stirrup 22, the main bar 21 is distributed around the pile body 1 in a surrounding manner along the axial direction of the pile body 1, and the stirrup 22 is fixedly bound and connected with the main bar 21 along the radial direction of the pile body 1; the main reinforcement 21 adopts uneven reinforcement to configure a plurality of reinforcements on the main stressed part, and configures prestressed main reinforcements according to the actual stress requirements, and also can configure non-prestressed main reinforcements to form composite reinforcement so as to meet the actual stress requirements; the part with smaller stress only needs to meet the requirement of structural reinforcement;

the connection problems of the prefabricated continuous wall, the support, the enclosing purlin and the like can occur in the excavation process after the construction of the chain prefabricated underground continuous wall is completed. When the chain prefabricated underground continuous wall is manufactured, connectors or embedded connecting steel plates can be embedded in pile bodies, but the problems of embedding positions and the like can be solved, and large-area embedding or customization and the like are needed. The wall of the grouting groove 11 can be connected with a supporting piece 5 for supporting the purlin by chiseling pile body surface concrete, as shown in fig. 7, the pile body surface concrete is chiseled, namely the grouting groove part is close to the edge of the chamfer, the supporting piece 5 is a connecting steel bar, when connection is needed, only thin concrete on the surface needs to be chiselled, the steel bar of the grouting groove can be found, and the connecting steel bar can be directly welded on the steel bar of the grouting groove; for the support parts and the positions near the bottom of the foundation pit, larger bending moment and shearing force exist, reinforcing steel bar configuration and appropriate hoop reinforcement can be added locally near the support parts and the bottom of the foundation pit, and the bending resistance and the shearing resistance of the pile body are improved.

The present invention is not limited to the above embodiments, and any changes in the shape or material composition, or any changes in the structural design provided by the present invention, are all modifications of the present invention, and should be considered to be within the scope of the present invention.

Claims

1. The utility model provides an interlocking prefabricated underground continuous wall, includes pile body (1), its characterized in that: the pile body (1) comprises a steel bar assembly (2) for supporting the rigidity of the whole pile body, and the steel bar assembly (2) is embedded in the pile body (1); the side of the pile body (1) is buried with grouting grooves (11) used for connecting two adjacent pile bodies (1), the grouting grooves (11) are connected with anchoring steel bars (3) buried in the pile body (1), and the grouting grooves (11) are distributed along the axial direction of the pile body (1) and the notches (11-1) face the outer side of the pile body (1).

2. The interlocking prefabricated underground diaphragm wall according to claim 1, wherein: grouting grooves (11) are respectively embedded in opposite side edges of the pile body (1), and at least two grouting grooves (11) are embedded in each side edge.

3. The interlocking prefabricated underground continuous wall according to claim 1 or 2, wherein: and the grouting grooves (11) between the adjacent pile bodies (1) realize the connection of the adjacent pile bodies (1) through grouting or through the matching of grouting and the inserted connecting piece (4).

4. The interlocking prefabricated underground diaphragm wall according to claim 3, wherein: the cross section of the grouting groove (11) is in a dovetail groove shape, an I shape or a C shape.

5. The interlocking prefabricated underground diaphragm wall according to claim 3, wherein: the connecting piece (4) is a reinforcement cage or profile steel matched with the two grouting grooves (11).

6. The interlocking prefabricated underground diaphragm wall according to claim 1, wherein: the pile body (1) is formed in a centrifugal forming mode, and the cross section of the pile body (1) is circular in the outer side.

7. The interlocking prefabricated underground diaphragm wall according to claim 1, wherein: the end angle (12) of the pile body (1) is in a chamfer shape.

8. The interlocking prefabricated underground diaphragm wall according to claim 1, wherein: the anchoring reinforcing steel bars (3) are fixedly bound and connected with the reinforcing steel bar assembly (2), one ends of the anchoring reinforcing steel bars (3) are fixedly welded with the wall of the grouting groove (11), and the other ends of the anchoring reinforcing steel bars extend into the pile body (1).

9. The interlocking prefabricated underground continuous wall according to claim 1, wherein: the reinforcing steel bar component (2) comprises a main bar (21) and stirrups (22), the main bar (21) is followed the axial of the pile body (1) is distributed in a surrounding manner around the pile body (1), the stirrups (22) are followed the radial of the pile body (1) is fixedly connected with the main bar (21) in a binding manner.

10. The interlocking prefabricated underground diaphragm wall according to claim 1, wherein: and the wall of the grouting groove (11) is connected with a supporting piece (5) for supporting the surrounding purlin through chiseling pile body surface concrete.