CN115387326A - Bending bolt connection type prefabricated underground continuous wall - Google Patents
Bending bolt connection type prefabricated underground continuous wall Download PDFInfo
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- CN115387326A CN115387326A CN202210938944.8A CN202210938944A CN115387326A CN 115387326 A CN115387326 A CN 115387326A CN 202210938944 A CN202210938944 A CN 202210938944A CN 115387326 A CN115387326 A CN 115387326A
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- 238000005452 bending Methods 0.000 title claims abstract description 31
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- 238000007789 sealing Methods 0.000 claims description 19
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- 230000002787 reinforcement Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 238000010276 construction Methods 0.000 abstract description 17
- 238000010008 shearing Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 14
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- 239000002689 soil Substances 0.000 description 3
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/20—Bulkheads or similar walls made of prefabricated parts and concrete, including reinforced concrete, in situ
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
- E02D19/185—Joints between sheets constituting the sealing aprons
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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Abstract
The invention discloses a bent bolt connection type prefabricated underground continuous wall, and aims to provide a bent bolt connection type prefabricated underground continuous wall which is high in connection strength, good in integrity, convenient and fast to construct, capable of improving construction efficiency and capable of meeting requirements of bending resistance and shearing resistance of a wall body. The connecting device comprises a bent bolt connecting device used for connecting the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall, the bent bolt connecting device comprises a bent bolt, a bent bolt lower channel arranged on the upper portion of the lower prefabricated underground continuous wall and a bent bolt upper channel arranged on the lower portion of the upper prefabricated underground continuous wall, and the bent bolt penetrates through the bent bolt lower channel and the bent bolt upper channel and connects the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall into a whole.
Description
Technical Field
The invention relates to an underground continuous wall, in particular to a bent bolt connection type prefabricated underground continuous wall.
Background
The underground continuous wall is widely applied to soft soil foundation pit enclosure engineering due to the advantages of large integral rigidity, good water stopping effect and the like. The traditional cast-in-place underground continuous wall has the defects of long construction time, underwater concrete pouring and other factors, is easy to have the problems of difficult control of underwater concrete mud clamping, concrete pipe blocking and wall breaking, joint mud clamping, leakage, embedded rib positions and the like, and has adverse influence on engineering. The process for prefabricating the underground diaphragm wall can better solve the problems, and simultaneously has the advantages of high strength, industrial manufacture, high construction efficiency, construction site saving, environmental protection and the like.
The prefabricated underground continuous wall is influenced by traffic transportation control, the single-width length of the prefabricated underground continuous wall is often limited, the actual excavation depth is deep, and the single-width wall is difficult to meet the design requirement. Therefore, a plurality of continuous walls need to be vertically connected from top to bottom so as to meet the design requirement of wall depth. In the process of installing the underground continuous walls, the strength and the impermeability of the connecting nodes between the underground continuous walls are key factors to be controlled. At present, the vertical connecting structures between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall are connected through concrete pouring, welding and other modes. The method has the problems of complex construction process, low construction efficiency, site environment pollution easily caused by concrete pouring, incapability of ensuring the bending resistance of the connecting joint and the like.
Disclosure of Invention
The invention aims to provide a bending bolt connection type prefabricated underground continuous wall which is high in connection strength, good in integrity and convenient and fast to construct, can improve construction efficiency and can meet the requirements of bending resistance and shearing resistance of a wall body.
The technical scheme of the invention is as follows:
the vertical connecting system comprises a bending bolt connecting device for connecting the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall, the bending bolt connecting device comprises a bending bolt, a bending bolt lower channel arranged on the upper portion of the lower prefabricated underground continuous wall and a bending bolt upper channel arranged on the lower portion of the upper prefabricated underground continuous wall, the upper end of the bending bolt lower channel is communicated with the upper end face of the lower prefabricated underground continuous wall, the lower end of the bending bolt lower channel is communicated with the outer side face of the lower prefabricated underground continuous wall, the lower end of the bending bolt upper channel is communicated with the lower end face of the upper prefabricated underground continuous wall, the upper end of the bending bolt upper channel is communicated with the outer side face of the upper prefabricated underground continuous wall, and the bending bolt penetrates through the bending bolt lower channel and the bending bolt upper channel and connects the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall into a whole.
With the vertical connection structure between the prefabricated underground continuous wall of upper and lower breadth among the prior art through concrete placement, modes such as welding realize connecting and compare, the prefabricated underground continuous wall of lower breadth and the prefabricated underground continuous wall of upper breadth of this scheme are connected through curved bolt connecting device, it is concrete, after the prefabricated underground continuous wall of upper breadth hoists lower breadth prefabricated underground continuous wall upper end, pass curved bolt lower passage and curved bolt upper channel through the curved bolt, it is even as an organic whole with prefabricated underground continuous wall of upper breadth with the prefabricated underground continuous wall of lower breadth, its joint strength is high, good wholeness, it is convenient to be under construction, can improve the efficiency of construction, can satisfy the wall body bending resistance again and the requirement of shearing.
Preferably, the middle part of the upper end face of the lower prefabricated underground continuous wall is provided with a lower wall tenon, the middle part of the lower end face of the upper prefabricated underground continuous wall is provided with an upper wall mortise, and the lower wall tenon is arranged in the upper wall mortise. The tenon of the upper wall and the tenon of the lower wall can be connected in an occlusion way, so that the capability of resisting horizontal relative displacement of the underground diaphragm wall is effectively improved.
Preferably, the number of the bent bolt connecting devices is a plurality, each bent bolt connecting device is distributed in two rows, and the two rows of bent bolt connecting devices are distributed on two opposite sides of the tenon of the lower wall. Therefore, the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall can be effectively connected into a whole through the bent bolt connecting device under the condition that the layout of the tenon of the lower wall, the mortise of the upper wall and the bent bolt connecting device is not influenced.
Preferably, the vertical connecting system further comprises a screw locking device, the screw locking device comprises a pre-embedded lower screw locking assembly and a pre-embedded upper screw locking assembly,
the embedded upper screw lock assembly is pre-embedded in the inner top surface of the mortise of the upper wall and comprises an inserting rod, the inserting rod is positioned in the mortise of the upper wall, and the lower end of the inserting rod is provided with a clamping joint;
the embedded lower screw lock component comprises a lower fixed cylinder embedded on the top surface of a lower wall tenon in advance, a limiting cylinder fixedly arranged in the lower fixed cylinder, and a snap ring and a lower spring arranged in the lower fixed cylinder, wherein the lower end of the lower fixed cylinder is sealed, the upper end of the lower fixed cylinder is opened, an inner hole of the limiting cylinder is formed into a limiting insertion hole matched with the insertion rod, the lower end of the limiting insertion hole is a snap ring guide cavity with the inner diameter gradually increased from top to bottom, the snap ring supports against the inner wall of the snap ring guide cavity under the action of the lower spring, the insertion rod is inserted into the limiting insertion hole, and the snap ring blocks the snap joint to prevent the insertion rod from moving upwards.
The screw locking device can be matched with a bent bolt connecting device to connect the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall into a whole, specifically, the lower prefabricated underground continuous wall is well installed, and when the upper prefabricated underground continuous wall is hoisted, the inserting rod of the pre-embedded upper screw locking assembly pre-embedded in the upper prefabricated underground continuous wall is inserted into the limiting inserting hole in the limiting cylinder pre-embedded in the lower prefabricated underground continuous wall, so that the requirements of bending resistance and shearing resistance of the wall body are further improved; meanwhile, the clamping joint is clamped through the clamping ring to prevent the insertion rod from moving upwards, so that the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall are preliminarily connected into a whole; and then, the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall are connected into a whole through the bent bolts, so that the connection strength of the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall is high, the integrity is good, and meanwhile, the construction is convenient and fast, the construction efficiency can be improved, and the requirements of bending resistance and shearing resistance of the wall body can be met. In addition, the screw locking device and the bent bolt connecting device are matched in two connecting modes, so that the defects of the two modes can be effectively overcome, the connecting strength and reliability are obviously improved, and the problem that the connecting part of the underground diaphragm wall is broken due to the failure of one connecting mode, and the engineering is adversely affected can be avoided.
Preferably, the pre-buried upper screw lock assembly further comprises an upper guide cylinder pre-buried on the inner top surface of the mortise of the upper wall, a sliding column sliding along the upper guide cylinder and an upper spring located above the sliding column, the upper end and the lower end of the upper guide cylinder are sealed, the lower end of the upper guide cylinder is provided with a plug rod through hole, the sliding column abuts against the lower end of the upper guide cylinder under the action of the upper spring, and the plug rod is fixedly arranged at the lower end of the sliding column. Because the weight of the prefabricated underground continuous wall of the upper panel is big, the inserted link is located the wall tongue-and-groove of the upper panel, and at the in-process of hoist prefabricated underground continuous wall of the upper panel, the operator is difficult to the embedded inserted link of the screw lock subassembly of going up of effectual observation for the embedded inserted link of going up the screw lock subassembly is adjusted well the operation degree of difficulty with the embedded spacing spliced eye of screw lock subassembly down and is great. Appear easily in the actual operation in-process because of spliced pole and spacing spliced eye not adjusting well for the spliced pole of screw lock subassembly supports on the top surface of lower wall tenon in the embedding, and leads to embedded screw lock subassembly to be destroyed. In order to solve this problem, this scheme improves the spiral shell lock subassembly on pre-buried, and the in-process of prefabricated underground continuous wall on the hoist and mount upper panel if not adjusting well with spacing spliced eye according to the inserted bar for the inserted bar of spiral shell lock subassembly is supported when the top surface of lower panel wall tenon in pre-buried, and the effort of going up the spring will be overcome to the slip post, makes inserted bar and slip post up move to the guide cylinder in, thereby avoids pre-buried spiral shell lock subassembly destroyed problem.
Preferably, the lower channel of the bent bolt and the upper channel of the bent bolt are both counter bores, the lower end of the lower channel of the bent bolt is provided with a stepped hole for accommodating a head or a nut of the bent bolt, the upper end of the upper channel of the bent bolt is provided with a stepped hole for accommodating a head or a nut of the bent bolt, the head of the bent bolt is accommodated in the stepped hole at the upper end of the upper channel of the bent bolt or the stepped hole at the lower end of the lower channel of the bent bolt, and the nut of the bent bolt is accommodated in the stepped hole at the lower end of the lower channel of the bent bolt or the stepped hole at the upper end of the upper channel of the bent bolt. So, guarantee that the head and the nut of curved bolt all hold in the shoulder hole, be favorable to the prefabricated underground continuous wall cartridge of upper panel to arrive in the underground soil layer.
Preferably, the upper curved bolt channel is arc-shaped, and the lower curved bolt channel is arc-shaped.
Preferably, an annular sealing rubber strip is arranged between the lower end face of the upper prefabricated underground continuous wall and the upper end face of the lower prefabricated underground continuous wall, the annular sealing rubber strip extends along the edge of the upper end face of the lower prefabricated underground continuous wall, the upper end of the lower channel of the bent bolt and the lower end of the upper channel of the bent bolt are both positioned on the inner side of the annular sealing rubber strip, a grouting channel is further arranged on the lower portion of the outer wall of the upper prefabricated underground continuous wall, the lower end of the grouting channel is communicated with the lower end face of the upper prefabricated underground continuous wall, the lower end of the grouting channel is positioned on the inner side of the annular sealing rubber strip, and the grouting channel is used for injecting high-strength grouting material into a gap between the lower end face of the upper prefabricated underground continuous wall and the upper end face of the lower prefabricated underground continuous wall.
Thus, after the upper prefabricated underground continuous wall is hoisted to the lower prefabricated underground continuous wall, high-strength grouting material can be injected between the lower end surface of the upper prefabricated underground continuous wall and the upper end surface of the lower prefabricated underground continuous wall through the grouting channel, and the arrangement of the annular sealing rubber strip can avoid seepage of the high-strength grouting material, so that a gap between the lower end surface of the upper prefabricated underground continuous wall and the upper end surface of the lower prefabricated underground continuous wall is filled with the high-strength grouting material; therefore, the integrity of the prefabricated underground continuous wall and the strength of the connecting part of the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall can be improved. Meanwhile, the water stopping performance of the connecting part between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall is improved, and the requirements of seepage prevention and water stopping are met.
Preferably, the gap between the lower end face of the upper prefabricated underground continuous wall and the upper end face of the lower prefabricated underground continuous wall is filled with high-strength grouting material.
Preferably, steel reinforcement cages are arranged in the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall and comprise vertical reinforcements and horizontal reinforcements. The reinforcement cage includes vertical muscle and horizontal muscle to improve the intensity of prefabricated underground continuous wall of upper panel and prefabricated underground continuous wall of lower panel.
The invention has the beneficial effects that: the wall body anti-bending and anti-shearing device has the characteristics of high connection strength, good integrity and convenience in construction, and can improve the construction efficiency and meet the requirements of bending resistance and shearing resistance of the wall body.
Drawings
Fig. 1 is a schematic view of a partial structure of the bending bolt connection type prefabricated underground continuous wall of the invention after the prefabricated underground continuous wall of upper and lower panels is assembled.
Fig. 2 is a partial structural view of the bending bolt connection type prefabricated underground continuous wall of the present invention before the assembly of the prefabricated underground continuous wall of the upper and lower panels.
Fig. 3 is a partial structural schematic view of the pre-buried lower screw lock assembly and the pre-buried upper screw lock assembly of the screw lock device of the bending bolt connection type prefabricated underground continuous wall of the present invention before assembly.
Fig. 4 is a partial enlarged view of a portion a of fig. 1.
In the figure:
the lower wall is prefabricated with an underground continuous wall 1 and a lower wall tenon 1.1;
the upper wall is prefabricated with an underground continuous wall 2 and an upper wall mortise 2.1;
the device comprises a bent bolt connecting device 3, a bent bolt 3.1, a bent bolt lower channel 3.2 and a bent bolt upper channel 3.3;
the device comprises a screw locking device 4, an embedded upper screw locking assembly 4.0a, an embedded lower screw locking assembly 4.0b, an upper guide cylinder 4.1, an insertion rod 4.2, a clamping joint 4.3, a lower fixing cylinder 4.4, a lower spring 4.5, a limiting cylinder 4.6, a clamping ring 4.7, an annular pressing sheet 4.8, an upper prestressed anchor rib 4.9, a lower prestressed anchor rib 4.10, an annular clamping groove 4.11, a sliding column 4.12, an upper spring 4.13, a limiting insertion hole 4.14, a clamping ring guide cavity 4.15 and an embedded pipe 4.16;
an annular sealing rubber strip 5.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings:
the first embodiment is as follows: as shown in fig. 1 and 2, the bending bolt connection type prefabricated underground continuous wall comprises a lower prefabricated underground continuous wall 1, an upper prefabricated underground continuous wall 2 and a vertical connection system. The upper prefabricated underground continuous wall is a solid prefabricated underground continuous wall or a hollow prefabricated underground continuous wall. The lower prefabricated underground continuous wall is a solid prefabricated underground continuous wall or a hollow prefabricated underground continuous wall. And the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall are internally provided with steel reinforcement cages which comprise vertical reinforcements and horizontal reinforcements. The vertical connecting system comprises a bent bolt connecting device 3 for connecting the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall. The bent bolt connecting device 3 comprises a bent bolt 3.1, a bent bolt lower channel 3.2 arranged at the upper part of the lower prefabricated underground continuous wall and a bent bolt upper channel 3.3 arranged at the lower part of the upper prefabricated underground continuous wall. The upper channel of the bent bolt is arc-shaped, and the lower channel of the bent bolt is arc-shaped. The upper end of the lower channel of the bent bolt is communicated with the upper end face of the lower prefabricated underground continuous wall, and the lower end of the lower channel of the bent bolt is communicated with the outer side face of the lower prefabricated underground continuous wall. The lower end of the upper channel of the bent bolt is communicated with the lower end face of the upper prefabricated underground continuous wall, and the upper end of the upper channel of the bent bolt is communicated with the outer side face of the upper prefabricated underground continuous wall. And the bent bolt penetrates through the lower channel of the bent bolt and the upper channel of the bent bolt and connects the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall into a whole.
With the vertical connection structure between the prefabricated underground continuous wall of upper and lower breadth among the prior art through concrete placement, modes such as welding realize connecting and compare, the prefabricated underground continuous wall of lower breadth and the prefabricated underground continuous wall of upper breadth of this scheme are connected through curved bolt connecting device, it is concrete, after the prefabricated underground continuous wall of upper breadth hoists lower breadth prefabricated underground continuous wall upper end, pass curved bolt lower passage and curved bolt upper channel through the curved bolt, it is even as an organic whole with prefabricated underground continuous wall of upper breadth with the prefabricated underground continuous wall of lower breadth, its joint strength is high, good wholeness, it is convenient to be under construction, can improve the efficiency of construction, can satisfy the wall body bending resistance again and the requirement of shearing.
Further, as shown in fig. 1 and 2, the lower channel 3.2 of the bent bolt and the upper channel of the bent bolt are both countersunk, and the lower end of the lower channel of the bent bolt is provided with a stepped hole for accommodating the head or the nut of the bent bolt. The upper end of the elbow bolt upper channel 3.3 has a stepped bore for receiving the head or nut of the elbow bolt. The head of the bent bolt is received in a stepped hole in the upper end of the upper channel of the bent bolt or in a stepped hole in the lower end of the lower channel of the bent bolt. The nut on the elbow bolt is received in a stepped hole in the lower end of the elbow bolt lower passage or in a stepped hole in the upper end of the elbow bolt upper passage, and in this embodiment, the nut on the elbow bolt is received in a stepped hole in the lower end of the elbow bolt lower passage. So, guarantee that the head and the nut of curved bolt all hold in the shoulder hole, be favorable to the prefabricated underground continuous wall cartridge of upper panel to arrive in the underground soil layer.
Further, as shown in fig. 1 and fig. 2, a lower wall rabbet 1.1 is arranged in the middle of the upper end face of the lower prefabricated underground continuous wall, an upper wall mortise 1.2 is arranged in the middle of the lower end face of the upper prefabricated underground continuous wall, and the lower wall rabbet is arranged in the upper wall mortise. The tenon of the upper wall and the tenon of the lower wall can be connected in an occlusion way, so that the capability of resisting horizontal relative displacement of the underground diaphragm wall is effectively improved. In this embodiment, the cross section of the lower wall tenon is rectangular or trapezoidal, and the cross section of the upper wall mortise is also correspondingly rectangular or trapezoidal.
Further, as shown in fig. 1 and 2, a plurality of the bent bolt connecting devices 3 are provided, each bent bolt connecting device is distributed in two rows, and the two rows of bent bolt connecting devices are distributed on two opposite sides of the tenon of the lower wall. Therefore, the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall can be effectively connected into a whole through the bent bolt connecting device under the condition that the layout of the tenon of the lower wall, the mortise of the upper wall and the bent bolt connecting device is not influenced.
Further, as shown in fig. 1 and 2, an annular sealing rubber strip 5 is arranged between the lower end face of the upper prefabricated underground continuous wall and the upper end face of the lower prefabricated underground continuous wall, and the annular sealing rubber strip extends along the edge of the upper end face of the lower prefabricated underground continuous wall. The upper end of the lower channel of the bent bolt and the lower end of the upper channel of the bent bolt are both positioned on the inner side of the annular sealing rubber strip. And the lower part of the outer wall of the upper prefabricated underground continuous wall is also provided with a grouting channel, the lower end of the grouting channel is communicated with the lower end surface of the upper prefabricated underground continuous wall, and the lower end of the grouting channel is positioned on the inner side of the annular sealing rubber strip. The lower wall tenon is positioned on the inner side of the annular sealing rubber strip. The grouting channel is used for injecting high-strength grouting materials into a gap between the lower end face of the upper prefabricated underground continuous wall and the upper end face of the lower prefabricated underground continuous wall. And a gap between the lower end face of the upper prefabricated underground continuous wall and the upper end face of the lower prefabricated underground continuous wall is filled with high-strength grouting material. Thus, after the upper prefabricated underground continuous wall is hoisted to the lower prefabricated underground continuous wall, high-strength grouting material can be injected between the lower end surface of the upper prefabricated underground continuous wall and the upper end surface of the lower prefabricated underground continuous wall through the grouting channel, and the arrangement of the annular sealing rubber strip can avoid seepage of the high-strength grouting material, so that a gap between the lower end surface of the upper prefabricated underground continuous wall and the upper end surface of the lower prefabricated underground continuous wall is filled with the high-strength grouting material; therefore, the integrity of the prefabricated underground continuous wall and the strength of the connecting part of the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall can be improved. Meanwhile, the water stopping performance of the connecting part between the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall is improved, and the requirements of seepage prevention and water stopping are met.
The second concrete embodiment: the remaining structure of this embodiment is described with reference to the first embodiment, but it is different therefrom,
as shown in fig. 1, 2, 3 and 4, the vertical connection system further comprises a screw locking device 4. The screw locking device 4 comprises a lower pre-embedded screw locking component 4.0b and an upper pre-embedded screw locking component 4.0a. The pre-embedded upper screw lock assembly is pre-embedded in the inner top surface of the mortise of the upper wall. The pre-buried screw lock subassembly of going up includes spliced pole 4.2, and in this embodiment, the spliced pole is vertical distribution. The inserted link is located the wall tongue-and-groove of upper panel, and the lower extreme of inserted link is equipped with joint 4.3. The pre-embedded lower screw lock component comprises a lower fixed cylinder 4.4 pre-embedded on the top surface of the lower wall tenon, a limiting cylinder 4.6 fixedly arranged in the lower fixed cylinder, a snap ring 4.7 arranged in the lower fixed cylinder and a lower spring 4.5. In this embodiment, the lower fixed cylinder is vertical distribution. The lower end of the lower fixed cylinder is closed, and the upper end of the lower fixed cylinder is opened. The inner hole of the limiting cylinder forms a limiting plug hole 4.14 matched with the plug rod, and the limiting plug hole is vertically distributed. The lower end of the limiting inserting hole is a clamping ring guide cavity 4.15 with the inner diameter gradually increasing from top to bottom. The snap ring moves upwards under the action of the lower spring and abuts against the inner wall of the snap ring guide cavity. The plug-in rod is inserted in the limit plug-in hole. The snap ring clamps the snap joint to prevent the plug rod from moving upwards.
The screw locking device can be matched with a bent bolt connecting device to connect the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall into a whole, specifically, the lower prefabricated underground continuous wall is well installed, and when the upper prefabricated underground continuous wall is hoisted, the inserting rod of the pre-embedded upper screw locking assembly pre-embedded in the upper prefabricated underground continuous wall is inserted into the limiting inserting hole in the limiting cylinder pre-embedded in the lower prefabricated underground continuous wall, so that the requirements of bending resistance and shearing resistance of the wall body are further improved; meanwhile, the clamping joint is clamped through the clamping ring to prevent the insertion rod from moving upwards, so that the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall are preliminarily connected into a whole; and then, the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall are connected into a whole through the bent bolts, so that the high connection strength and the good integrity of the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall are further ensured, and meanwhile, the construction is convenient and fast, the construction efficiency can be improved, and the requirements of bending resistance and shearing resistance of the wall body can be met. In addition, the screw locking device and the bent bolt connecting device are matched, so that the defects of the two modes can be effectively overcome, the connecting strength and reliability are obviously improved, and the problem that the connecting part of the underground diaphragm wall is broken due to the failure of one connecting mode, and the engineering is adversely affected is avoided.
Specifically, the snap ring 4.7 comprises a plurality of clamping blocks with the same shape and size, and the clamping blocks are uniformly distributed and enclosed along the circumferential direction of the axis of the limiting cylinder to form the snap ring. The number of the clamping blocks is 2 blocks, 3 blocks, 4 blocks, 5 blocks or more, in the embodiment, the number of the clamping blocks is 3 blocks. The outer wall of the clamping block is matched with the inner wall of the clamping ring guide cavity. The inner wall of the clamping block is provided with clamping teeth for improving the friction force between the clamping block and the clamping head. In this embodiment, pre-buried spiral shell lock subassembly still includes annular preforming 4.8, and the annular preforming is located between lower spring and the snap ring. The lower end of the lower spring is propped against the lower end of the lower fixed cylinder, and the upper end of the lower spring is propped against the annular pressure plate. The annular pressing sheet upwards supports the clamping ring to press on the inner wall of the clamping ring guide cavity under the action of the lower spring.
The bayonet joint can pass spacing spliced eye. The outer diameter of the clamping head is increased from bottom to top and then reduced. The lower extreme of inserted bar forms with joint head junction and is used for 4.11 with snap ring complex annular joint grooves. The inner wall of the annular clamping groove is conical, and the outer diameter of the inner wall of the annular clamping groove is gradually reduced from bottom to top. So, at the in-process of hoist and mount prefabricated underground continuous wall of upper panel, be favorable to the peg graft pole to insert spacing spliced eye to make the snap ring block joint, in order to prevent the peg graft pole upwards to move.
In the process of hoisting the upper prefabricated underground continuous wall, the insertion rods are downwards inserted into the limiting insertion holes. When the clamping ring is matched with the annular clamping groove, each clamping block of the clamping ring moves upwards along the inner wall of the clamping ring guide cavity under the action of the lower spring, and each clamping block of the clamping ring abuts against the inner wall of the annular clamping groove; thereby the clamping joint is clamped by the clamping ring to prevent the plug rod from moving upwards.
In this embodiment, there are a plurality of screw locking devices. The screw locking devices are arranged in 2 rows. Each row of screw locking devices comprises a plurality of screw locking devices which are distributed at equal intervals along the length direction of the lower wall tenon.
Further, as shown in fig. 4, the upper end of the upper guide cylinder is provided with an upper prestressed anchor bar 4.9. So, can improve pre-buried stability of burying spiral shell lock subassembly in prefabricated underground continuous wall of upper panel in advance. The lower end of the lower fixed cylinder is provided with a lower prestressed anchor bar 4.10. So, can improve pre-buried stability of screw lock subassembly is buried underground in upper panel prefabricated underground continuous wall under pre-buried.
Be equipped with the internal thread on the inner wall of lower solid fixed cylinder, the outer wall of a spacing section of thick bamboo is equipped with the external screw thread, and a spacing section of thick bamboo passes through threaded connection with lower solid fixed cylinder. So, be convenient for spacing section of thick bamboo installation and dismantlement, simultaneously, still be convenient for adjust the mounting height of spacing section of thick bamboo fixed cylinder under.
Further, as shown in fig. 1, 2, 3 and 4, each pre-buried upper screw lock assembly further comprises an upper guide cylinder 4.1 pre-buried on the lower end surface of the upper prefabricated underground continuous wall, a sliding column 4.12 sliding along the upper guide cylinder, and an upper spring 4.13 positioned above the sliding column. The upper and lower both ends of going up the guide cylinder are sealed, and go up the guide cylinder lower extreme and be provided with the inserted bar via hole. The sliding column is propped against the lower end of the upper guide cylinder under the action of the upper spring. The insertion rod 4.2 is fixedly arranged at the lower end of the sliding column. In this embodiment, the downward pressure of the upper spring on the sliding column is greater than the upward pressure of the lower spring on the annular pressing sheet. Because the weight of the prefabricated underground continuous wall of upper panel is big, the inserted link is located the wall tongue-and-groove of upper panel, and at the in-process of hoist prefabricated underground continuous wall of upper panel, the operator is difficult to the effectual inserted link of observing the screw lock subassembly in advance for the inserted link of screw lock subassembly in advance is adjusted well the operation degree of difficulty great with the spacing spliced eye of screw lock subassembly under the embedding with in advance. Appear easily in the actual operation in-process because of inserted bar and spacing spliced eye are not adjusted well for the inserted bar of screw lock subassembly supports on the top surface of wall tenon down in advance in the embedding, and leads to the embedded screw lock subassembly of going up to be destroyed. In order to solve this problem, this scheme is improved the screw lock subassembly on to pre-buried, the in-process of prefabricated underground continuous wall of width of cloth in the hoist and mount, if do not adjust well with spacing spliced eye according to the inserted link, when making the inserted link of screw lock subassembly support the top surface of wall tenon under in the pre-buried, the effort of spring will be overcome to the slip post, make inserted link and slip post up move to in the guide cylinder, thereby avoid pre-buried screw lock subassembly destroyed problem of going up.
Further, as shown in fig. 1 and 4, an embedded pipe 4.16 is arranged on an upper guide cylinder in an embedded upper screw locking assembly of one or two screw locking devices in each screw locking device, the upper guide cylinder is connected with the sliding column in a sliding and sealing manner, and a cavity above the sliding column in the upper guide cylinder is filled with liquid. One end of the embedded pipe is communicated with the upper part of the inner cavity of the upper guide cylinder, and the other end of the embedded pipe is communicated with the outer side surface of the upper prefabricated underground continuous wall. The other end of the embedded pipe is internally provided with a rubber sealing plug which can be pulled out. Although the embedded upper screw lock assembly can effectively solve the problem that the embedded upper screw lock assembly is damaged because the insertion rod is not aligned with the limiting insertion hole in the process of hoisting the upper prefabricated underground continuous wall; however, after the upper prefabricated underground continuous wall is hung on the upper end face of the lower prefabricated underground continuous wall, the screw locking device is completely shielded, an operator often difficultly judges whether the insertion rod is inserted into the limiting insertion hole, if the insertion rod is not inserted into the limiting insertion hole, the lower prefabricated underground continuous wall and the upper prefabricated underground continuous wall fail to leave the bank by the margin, in order to solve the problem, the scheme is improved, one screw locking device is improved, in the process of hoisting the upper prefabricated underground continuous wall, if the insertion rod of the screw locking device is not aligned with the limiting insertion hole, the insertion rod of the screw locking device is abutted against the upper end face of the lower prefabricated underground continuous wall, the insertion rod and the sliding column move upwards into the upper guide cylinder, so that the liquid in the upper guide cylinder is extruded through the embedded pipe (the liquid automatically jacks the rubber sealing plug), and the operator can judge whether the insertion rod of the screw locking device is aligned with the insertion hole in the limiting pipe or not through whether the liquid in the embedded pipe flows out, and then the inserted rod of the screw locking device is indicated that the limiting hole is aligned with the embedded pipe; if liquid flows out of the embedded pipes, the plug-in rod of the screw locking device is not aligned with the limiting plug-in hole; at the moment, the operator needs to hoist the upper prefabricated underground continuous wall again so as to align the insertion rod of the screw locking device with the limiting insertion hole.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a prefabricated underground continuous wall of curved bolt connection formula, includes prefabricated underground continuous wall of lower panel, prefabricated underground continuous wall of upper panel and vertical connected system, characterized by, vertical connected system is including being used for connecting the prefabricated underground continuous wall of lower panel and the prefabricated underground continuous wall of upper panel's curved bolt connecting device, and curved bolt connecting device includes the curved bolt, sets up at the lower passageway of the curved bolt on prefabricated underground continuous wall upper portion of lower panel and sets up the curved bolt upper channel in the prefabricated underground continuous wall lower part of upper panel, the upper end of curved bolt lower channel communicates with the up end of prefabricated underground continuous wall of lower panel, and the lower extreme of curved bolt lower channel communicates with the lateral surface of prefabricated underground continuous wall of lower panel, the lower extreme of curved bolt upper channel communicates with the lower extreme of prefabricated underground continuous wall of upper panel, and the upper end of curved bolt upper channel communicates with the lateral surface of prefabricated underground continuous wall of upper panel, the curved bolt passes curved bolt lower channel and curved bolt upper channel and links prefabricated underground continuous wall of lower panel and prefabricated underground continuous wall of upper panel as an organic whole.
2. The elbow bolt connection type prefabricated underground continuous wall as claimed in claim 1, wherein the middle part of the upper end surface of the lower prefabricated underground continuous wall is provided with a lower wall tenon, the middle part of the lower end surface of the upper prefabricated underground continuous wall is provided with an upper wall mortise, and the lower wall tenon is arranged in the upper wall mortise.
3. The curved bolt connection type prefabricated underground continuous wall as claimed in claim 2, wherein the number of the curved bolt connection devices is several, each curved bolt connection device is distributed in two rows, and the two rows of the curved bolt connection devices are distributed at opposite sides of the tenon of the lower wall.
4. The bent bolt connection type prefabricated underground continuous wall as claimed in claim 2 or 3, wherein the vertical connection system further comprises a screw locking device, the screw locking device comprises a pre-embedded lower screw locking component and a pre-embedded upper screw locking component,
the embedded upper screw lock assembly is pre-embedded in the inner top surface of the mortise of the upper wall and comprises an inserting rod, the inserting rod is positioned in the mortise of the upper wall, and the lower end of the inserting rod is provided with a clamping joint;
the embedded lower screw lock component comprises a lower fixing cylinder embedded in advance on the top surface of a lower wall tenon, a limiting cylinder fixedly arranged in the lower fixing cylinder, and a clamping ring and a lower spring which are arranged in the lower fixing cylinder, wherein the lower end of the lower fixing cylinder is sealed, the upper end of the lower fixing cylinder is opened, an inner hole of the limiting cylinder is formed into a limiting insertion hole matched with the insertion rod, the lower end of the limiting insertion hole is a clamping ring guide cavity with the inner diameter gradually increased from top to bottom, the clamping ring supports against the inner wall of the clamping ring guide cavity under the action of the lower spring, the insertion rod is inserted into the limiting insertion hole, and the clamping ring blocks the clamping head to prevent the insertion rod from moving upwards.
5. The curved bolt connection type prefabricated underground continuous wall as claimed in claim 4, wherein the pre-embedded upper screw lock assembly further comprises an upper guide cylinder pre-embedded on the inner top surface of the mortise of the upper wall, a sliding column sliding along the upper guide cylinder and an upper spring positioned above the sliding column, the upper end and the lower end of the upper guide cylinder are closed, the lower end of the upper guide cylinder is provided with a through hole of an insertion rod, the sliding column abuts against the lower end of the upper guide cylinder under the action of the upper spring, and the insertion rod is fixedly arranged at the lower end of the sliding column.
6. The curved bolt connection type prefabricated underground continuous wall as claimed in claim 1, 2 or 3, wherein the curved bolt lower channel and the curved bolt upper channel are both counter bored, the lower end of the curved bolt lower channel is provided with a stepped hole for receiving a head portion of a curved bolt or a nut, the upper end of the curved bolt upper channel is provided with a stepped hole for receiving a head portion of a curved bolt or a nut, the head portion of the curved bolt is received in the stepped hole of the upper end of the curved bolt upper channel or the stepped hole of the lower end of the curved bolt lower channel, and the nut of the curved bolt is received in the stepped hole of the lower end of the curved bolt lower channel or the stepped hole of the upper end of the curved bolt upper channel.
7. The curved bolt connection type prefabricated underground continuous wall as claimed in claim 1, 2 or 3, wherein the curved bolt upper channel is arc-shaped, and the curved bolt lower channel is arc-shaped.
8. The bent bolt connection type prefabricated underground continuous wall as claimed in claim 1, 2 or 3, wherein an annular sealing rubber strip is arranged between the lower end surface of the upper prefabricated underground continuous wall and the upper end surface of the lower prefabricated underground continuous wall, the annular sealing rubber strip extends along the edge of the upper end surface of the lower prefabricated underground continuous wall, the upper end of the lower channel of the bent bolt and the lower end of the upper channel of the bent bolt are both positioned inside the annular sealing rubber strip, a grouting channel is further arranged at the lower part of the outer wall of the upper prefabricated underground continuous wall, the lower end of the grouting channel is communicated with the lower end surface of the upper prefabricated underground continuous wall, the lower end of the grouting channel is positioned inside the annular sealing rubber strip, and the grouting channel is used for injecting high-strength grouting material into a gap between the lower end surface of the upper prefabricated underground continuous wall and the upper end surface of the lower prefabricated underground continuous wall.
9. The curved bolt connection type prefabricated underground continuous wall as claimed in claim 8, wherein a gap between the lower end surface of the upper prefabricated underground continuous wall and the upper end surface of the lower prefabricated underground continuous wall is filled with a high-strength grouting material.
10. The bending bolt connection type prefabricated underground continuous wall as claimed in claim 1, 2 or 3, wherein reinforcement cages are arranged in both the upper prefabricated underground continuous wall and the lower prefabricated underground continuous wall, and each reinforcement cage comprises vertical ribs and horizontal ribs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210938944.8A CN115387326A (en) | 2022-08-05 | 2022-08-05 | Bending bolt connection type prefabricated underground continuous wall |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210938944.8A CN115387326A (en) | 2022-08-05 | 2022-08-05 | Bending bolt connection type prefabricated underground continuous wall |
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| CN115387326A true CN115387326A (en) | 2022-11-25 |
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| CN202210938944.8A Pending CN115387326A (en) | 2022-08-05 | 2022-08-05 | Bending bolt connection type prefabricated underground continuous wall |
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| CN208849580U (en) * | 2018-08-28 | 2019-05-10 | 安徽宏远机械制造有限公司 | A kind of fixed structure of electric motor end cap and motor |
| CN213741595U (en) * | 2020-11-25 | 2021-07-20 | 郑州城市职业学院 | Building steel connection structure |
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| CN101979778A (en) * | 2010-10-07 | 2011-02-23 | 周兆弟 | Method for butting concrete prefabricated member consisting of prefabricated member connector |
| KR101799398B1 (en) * | 2016-08-29 | 2017-11-20 | 동아이엔지(주) | Precast self-supported wall structure using pile and perforated connection pipe and the construction method therefor |
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