14 results about "Tremie" patented technology

The invention belongs to the technical field of cast-in-place pile hole collapse prevention, and particularly relates to a silt layer self-balancing hole collapse prevention cast-in-place pile structure which comprises a reinforcement cage and a pile casing, the pile casing is detachably installed at an opening of a cast-in-place pile hole, and the reinforcement cage penetrates through an inner cavity of the pile casing and makes contact with the bottom of the inner cavity of the cast-in-place pile hole. The fixing part is detachably mounted at the top of the reinforcement cage, and the top of the reinforcement cage mounted closest to an opening of a cast-in-place pile hole can be continuously pressed through the fixing part; the adjusting part is arranged outside the fixing part, and the position of the reinforcement cage can be adjusted in time through the adjusting part, so that the central axis of the reinforcement cage coincides with the central axis of the cast-in-place pile hole all the time. According to the concrete foundation pile, through mutual cooperation of the parts, stirrup deformation and main reinforcement bending of the reinforcement cage caused by collapse of a silt layer during concrete pouring can be avoided, the bearing capacity of the built concrete foundation pile is guaranteed, and meanwhile the influence on lifting of the guide pipe and normal construction of a cast-in-place pile hole is avoided.

This invention belongs to the field of cofferdam construction technology, specifically relating to a control method for the rapid closure of a cofferdam with interlocking steel pipe piles. It includes the following steps: S1: Construction preparation: Determine the location of the cofferdam site and pre-fabricate the interlocking steel pipe piles, walers, and internal supports; obtain foundation components; S2: Positioning guide frame construction: Based on the edge location of the cofferdam site; S3: Driving steel pipe piles: Using the guide frame, drive steel pipe piles from the upstream side, then drive steel pipe piles on both sides; S4: Cofferdam closure and water sealing at the interlocking point; S5: Dewatering and sand removal within the cofferdam: Dewatering sand using a negative pressure agitation system with an air compressor, symmetrically excavating to form a basin bottom and maintaining water pressure balance to ensure the bottom sealing thickness; S6: Installing internal supports; S7: Concrete sealing at the bottom; The bottom sealing concrete uses an underwater tremie pipe method, supplementing the lower parts to the design elevation, and lifting the tremie pipe before final pouring to ensure a smooth surface; S8: Construction of the pier cap and pier body; S9: Cofferdam demolition; The cofferdam can only be demolished after the pier body and continuous beam blocks are constructed.

A method for constructing an encapsulation barrier includes: positioning a tremie pipe over a surface of a substrate material at first pile point; attaching a capping element to a lower end of the tremie pipe; lowering the capping element and a portion of the tremie pipe into the substrate material at the first pile point; applying an encapsulation material into an upper end of the tremie pipe until an upper surface of the encapsulation material reaches a particular level relative to the surface of the substrate material; raising the tremie pipe while maintaining the upper surface of the encapsulation material at the particular level relative to the surface of the substrate material; inserting a mixing tool into the tremie pipe, the mixing tool pushing the encapsulation mixture downward within the tremie pipe; and applying an additional volume of encapsulation material into the tremie pipe to form an encapsulation barrier.

A method for constructing a field-hardened pile using a drilling machine is disclosed. The method for constructing a field-hardened pile using a drilling machine according to an embodiment of the present invention comprises a ground drilling step of drilling the ground by a drilling machine to excavate to a target depth, an insertion step of inserting a tremie pipe and a vibratory compaction device into the drilled ground, a mortar manufacturing step of manufacturing mortar on-site, a mortar injection step of injecting the manufactured mortar into the drilled ground through a tremie pipe so as to form a pile body inside the drilled ground, and a withdrawal step of withdrawing the tremie pipe and the vibratory compaction device while operating the vibratory compaction device.

To easily insert a tremie pipe into a pile hole in which an underground piled column has been inserted.SOLUTION: An underground piled column, which is used in the top-down construction method and has its lower end buried in a cast-in-place concrete pile, comprises a main body that is inserted into a pile hole, and a short bracket that is attached to a side of the main body, has a beam connected to it, and is horizontally eccentric with respect to a center of the side width.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of constructional engineering construction, and discloses a limited-inner-diameter cast-in-place pile concrete guide pipe anti-clamping auxiliary device which comprises a plurality of device outer frames attached to the interior of an inner row reinforcement cage and detachably connected with one another, and guide pipes located in the device outer frames. The bottom end of the guide pipe extends out of the lowermost device outer frame by a certain distance. The guide pipe is formed by connecting a plurality of sections of hollow pipes, and the plurality of sections of hollow pipes are connected through clamping rings; a vertically-arranged fixing rib is fixed to the inner wall face of the device outer frame, and a groove matched with the fixing rib and used for containing the fixing rib is formed in the periphery of the clamping ring. The anti-blocking auxiliary device for the concrete guide pipe of the cast-in-place pile with the limited inner diameter is favorable for saving concrete pouring time, and solves the problem that the guide pipe is blocked due to the small inner diameter of a reinforcement cage while ensuring concrete pouring, so that the pouring quality of the cast-in-place pile is ensured, and meanwhile, the on-site construction progress is promoted.

The invention discloses a road and bridge pile foundation construction technology, and belongs to the field of road and bridge pile foundation construction. S2, pile position lofting is carried out; a round pit is dug in the pile position, the pit bottom is filled with clay, the center of a drilled hole is marked, and the pile casing is hoisted into the pit to be buried; s4, drilling after a drilling machine is in place; s5, hole forming inspection and hole cleaning are carried out; s6, manufacturing and placing a reinforcement cage: manufacturing the reinforcement cage in sections, connecting joints of the reinforcement cage by adopting a sleeve, and vertically hoisting the manufactured reinforcement cage into the drill hole by adopting two-point hoisting; s7, underwater concrete is poured through a guide pipe method; and S8, the pile casing is pulled out, and pile forming detection is conducted. By the adoption of the road and bridge pile foundation construction technology, the problems that in the existing road and bridge pile foundation construction process, the pile casing embedding precision is low, the drilling adaptability is weak, the reinforcement cage installation is unstable, the pile forming treatment is simple, and the technology adaptability is poor can be solved.

This invention discloses a construction method for an interlocking double-pile-wall-anchor foundation pit retaining structure. The structure includes deep mixing piles, H-shaped steel piles, a composite slab with truss ribs, and a cement-soil retaining wall. H-shaped steel piles are driven across adjacent deep mixing piles to form an interlocking pile body. The cement-soil retaining wall is located on the outside of the interlocking pile body, with the soil layer outside the foundation pit between them. Anchors are driven through the web of the H-shaped steel piles and into the soil layer outside the foundation pit and the cement-soil retaining wall. The composite slab with truss ribs is fixed to the deep mixing piles with high-strength bolts, and the enclosing cavity is filled with high-strength grout. The overall construction is carried out in layers and sections in a cyclical manner, including cement-soil retaining wall construction, deep mixing pile construction, H-beam steel pile driving and first-layer earthwork excavation, anchor bolt drilling and installation, high-strength bolt rebar installation and composite slab hoisting, high-strength grouting material tremie pipe construction and lower-layer earthwork excavation. It has the advantages of excellent water-stopping effect, strong synergistic bearing capacity, high assembly efficiency and good overall stability, and is suitable for various foundation pit retaining projects.

The application discloses a pile foundation casing and a construction method of a cast-in-place pile, and comprises a first casing wall and a second casing wall used for surrounding the pile foundation casing, a slot is formed in the first casing wall, the slot penetrates through the first casing wall along the axial direction of the first casing wall, the second casing wall is embedded in the slot and can slide along the slot, and a positioning structure for fixing a concrete guide pipe is arranged on the top end of the second casing wall, so that the height position of the second casing wall and the concrete guide pipe is unchanged when the first casing wall is lifted in the pile foundation construction, the concrete shrinkage can be timely supplemented, the operation is convenient, the construction difficulty is small, the time and labor cost can be saved, and the construction efficiency is obviously improved.

To provide a structure of a tremie pipe for sediment / rock muck input.SOLUTION: In a structure (1) of a tremie pipe for sediment / rock muck input, a tremie pipe (10) and a hopper (20) are connected to each other, the tremie pipe (10) has a first part (10A) whose inside and outside do not communicate with each other, and a second part (10B) having openings (16), the end on a water bottom side of the first part (10A) is deeper than a water depth of 2 m, and the openings (16) extend in a slit shape in a pipe axis direction in at least two parts in a circumferential direction of the tremie pipe.SELECTED DRAWING: Figure 1

This invention relates to the field of pier construction, providing a method and apparatus for one-time casting and forming of irregularly shaped high piers. The forming method is as follows: 1. Constructing a casting mold, which includes a pier body mold, two sets of arch molds, and a cap beam mold arranged sequentially from bottom to top. The two sets of arch molds are supported above the pier body mold and form a Y-shaped structure with it. 2. Grouting is injected into the pier body mold through a skylight located at the upper end of the pier body mold between the two sets of arch molds until the pier body is cast. 3. Grouting is injected into the two sets of arch molds through openings at their upper ends, completing the casting of the arches and cap beam sequentially from bottom to top. The forming method and apparatus of this invention first casts the pier body mold, which is vertical and has a skylight reserved at the top to facilitate grouting and vibration operations inside the pier body mold, as well as the insertion and lifting of the tremie pipe, avoiding concrete segregation. The two sets of arches and the cap beam are cast in one go, saving construction time and reducing construction difficulty.

The present invention relates to the technical field of cast-in-place pile construction, and provides a reinforcement cage anti-deviation device for pile foundation pouring under complex conditions. The technical solution is as follows: the reinforcement cage anti-deviation device for pile foundation pouring under complex conditions comprises vertical connecting rods, wherein one side of the outer side surface of each vertical connecting rod is separately provided with an upper movable lifting‑rebar ring and a lower movable lifting‑rebar ring that are coaxial, the other side of the outer side surface of the vertical connecting rod is separately provided with an upper lateral limit and a lower lateral limit that are used in cooperation with the inner side wall of a casing, and the side of the upper lateral limit away from the vertical connecting rod is provided with a casing end locking structure. The present invention has the following beneficial effects: the technical problem of the deviation of a reinforcement cage during concrete pouring can be solved; during construction, each lifting rebar of the reinforcement cage is limited in an enclosed space formed by a vertical limiting clamp, a vertical connecting rod and a movable lifting-rebar ring, and the displacement of a steel grating and the deviation of the lifting rebars may not be caused by vibrator compaction and repeated withdrawal of a tremie pipe during concrete pouring.

The automatic cleaning system for the concrete guide pipe of the cast-in-place pile has the advantages that conventional steel pipes and steel plates are easy to machine, manufacture and form on site, and the manufacturing process is simple and convenient; in addition, the utility model provides the function of automatically recovering and recycling the cleaning waste water, thereby avoiding the muddy construction site and having no clear relevant requirements on the section length and weight of the guide pipe. The automatic pipe coiling device is used for driving the rotary spray head, the spray head penetrates into the guide pipe to conduct rotary water spraying, and therefore the cleaning effect is achieved, and the guide pipe cleaning speed is effectively increased under the condition that the construction period is dense or the number of cast-in-place piles is large and the piles are long. In addition, the cleaning waste water automatic recovery and cyclic utilization functions are provided, the muddy construction site is avoided, and the site construction order cannot be influenced; there is no clear related requirements for the segment length and weight of the catheter, and no potential safety hazard exists in the cleaning process.

The utility model discloses a special tool for hoisting a concrete conduit. The special tool for hoisting the concrete guide pipe comprises a hoisting body, the hoisting body is composed of two hoop pieces which are detachably connected, and the hoop pieces are assembled to form an annular opening matched with the concrete guide pipe; the hoop piece is provided with a bearing face abutting against the bottom wall of the annular boss at the end of the concrete guide pipe and a hoisting part arranged outside the bearing face. The special tool for hoisting the concrete guide pipe is scientific and simple in structural design and convenient to use, the stability of the concrete guide pipe in the hoisting process is guaranteed, abrasion to the side wall of the concrete guide pipe caused by an existing hoisting mode is reduced, and follow-up construction is facilitated.