35 results about "Tremie" patented technology

To provide a construction method of a cast-in-place concrete pile allowing good quality concrete to be constructed by making the concrete flow outside of a steel cage through gaps between steel bars of the steel cage so as to reach a cover part.SOLUTION: A construction method of a cast-in-place concrete pile excavating a pile hole in the ground, placing a steel cage in the excavated pile hole and installing concrete in a pile hole in which the steel cage is placed using a tremie pipe provided with an excitation device, promotes fluidity of the concrete by applying vibration on concrete in a pile head part such that the concrete flow outside of the steel cage though gaps between steel bars of the steel cage through excitation of the tremie pipe by operating the excitation device, when installing concrete in an area of dense reinforcement in the pile head part.SELECTED DRAWING: Figure 10

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.

Systems and methods for using a continuous, thermoplastic tubing as a casing in a wellbore are provided. A continuous, thermoplastic tubing can be a high density polyethylene (HDPE) material that is stored in a coiled manner on a spindle. A screen can be attached to an end of the casing, and a tremie line can be selectively connected to the screen to inject gravel and cement downhole to pack the screen in place and grout the casing in place in the wellbore. The use of a continuous, thermoplastic tubing removes joints from the casing to improve performance, and such tubing is more readily available and cheaper than alternatives among other benefits described herein.

The present invention discloses a monitoring method for the casting of cast-in-place pile concrete, including an upper pressure monitoring device, a lower pressure monitoring device, an alarm device, and a central processor; the lower pressure monitoring device is arranged at a position 2 m away from the concrete outlet of the concrete conduit, and the lower pressure monitoring device is used to monitor the pressure value P1 at a position 2 m away from the concrete outlet of the concrete conduit; the upper pressure monitoring device is arranged at a position 6 m away from the concrete outlet of the concrete conduit, and the upper pressure monitoring device is used to monitor the pressure value P2 at a position 6 m away from the concrete outlet of the concrete conduit; the alarm device is communicatively connected to the central processor, and the alarm device is controlled by the central processor to emit alarm signal I or alarm signal II or alarm signal III, and can monitor the embedded depth of the conduit inserted into the concrete, so as to control the quality of the underwater cast-in-place pile body and the over-pouring depth.

The invention discloses an underground engineering pile foundation rotary excavating and bottom expanding construction method suitable for complex geology, which comprises the following steps: reasonably adjusting parameters such as water quantity and slurry concentration for a hard interlayer in a drilling process to clean a soil body, placing a pile casing after reaching the position of a bottom expanding hole, and expanding the bottom for the second time; and the bottom expanding quality is guaranteed through the scale marks, the spiral steel sheets and accurate control over the expanding angle and depth of the pile casing. Then wall protection slurry injection, casing outer grouting, casing recovery and secondary hole cleaning are sequentially carried out, then a steel sheath is put in, secondary pipe sinking grouting is carried out, then a concrete guide pipe is put in for hole cleaning, finally high-pressure grouting is carried out, and concrete pouring and pile head treatment are completed; and meanwhile, according to the scheme, the steel sheath is made of a degradable polymer composite material, the construction quality and environmental protection requirements are considered, and a systematic and effective solution is provided for pile foundation construction in a complex geological environment.

This invention relates to a flexible tremie pipe for preventing segregation in concrete pouring, comprising at least two vertically connected tremie pipe units. Each tremie pipe unit includes a pipe body and a flange. The pipe body is a funnel-shaped structure made of flexible rubber material, with a circular upper cross-section and a flattened lower section. The inner walls on opposite sides are fitted together. The top opening has an outwardly folded annular flange of a certain width. The flange includes an upper flange and a lower flange. The upper flange presses against the top surface of the flange on the pipe body, and the lower flange fits onto the pipe body and is close to the bottom surface of the flange. The upper and lower flanges are connected by bolts, clamping and fixing the flange. The flanges of the upper and lower tremie pipe units are connected by rigging or a lifting rod. This invention allows concrete to flow in a constrained state, preventing segregation.

The utility model discloses a pile foundation concrete guide pipe positioning platform which comprises two main frameworks, the two main frameworks are parallel to each other, two positioning structures are arranged between the two main frameworks, and two main supporting structures are arranged at the positions, below the two positioning structures, between the two main frameworks. The positioning semicircular openings in the two positioning structures form the positioning hole, and the positioning hole is formed in the center position over the reinforcement cage during construction and after building, so that the guide pipe is lowered along the positioning hole when the guide pipe is lowered, and the guide pipe can be lowered into the center position of the reinforcement cage and is more centered; impact is generated on the guide pipe during later pile foundation concrete pouring, the guide pipe is limited through the positioning holes, the guide pipe is not prone to deviation, mud is prevented from being clamped by concrete on a pile body, and the pile breaking consequence is avoided; the device is mainly made of channel steel, reinforcing steel bars and angle steel, materials are easy to obtain, and manufacturing is easy.

The present invention relates to the field of foundation pit excavation, and discloses a post-installation method of a hanging barrel type anchor structure for reducing the foundation pit excavation volume. By installing a space inside the pile body and setting the anchor inside the pile body, the raised structure formed by the traditional external anchor head is solved, thereby avoiding problems such as the increased foundation pit excavation volume, increased investment, longer construction period, and safety risks of implementing the fat groove caused by the fat groove filling; at the same time, by using the post-installation method, it effectively avoids the close contact between the concrete pouring conduit of the pile body and the hanging barrel type anchor under the extrusion of liquid concrete, resulting in the concrete conduit connection flange being stuck by this device and unable to be pulled out, delaying the concrete pouring, and further avoiding the risk of pile body scrapping; it can also avoid that when pouring the pile body concrete, the flowing concrete will form a large buoyancy on the hanging barrel type anchor buried in the pile body. If it cannot be firmly fixed, it is extremely easy to cause problems such as deviation and floating of the hanging barrel type anchor.

The utility model provides a reinforcing device for a concrete guide pipe, which comprises a supporting unit lapped above a cast-in-place pile casing, the upper surface of the supporting unit is adjustably connected with a positioning unit through a locking piece I, a retaining ring is arranged on the guide pipe, the guide pipe penetrates through the positioning unit, and the retaining ring is arranged on the guide pipe. And the stop ring is clamped above the positioning unit. The utility model solves the problems that the guide pipe is easy to deviate and is not firm in the concrete pouring process in the actual operation, the operation of workers is inconvenient, and the efficiency is low; the positioning unit can move on the supporting unit, the position can be adjusted according to different requirements, application is flexible, and the application range is wide.

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 construction device and method for replacing and filling concrete in a foundation of an open sea area. The construction device comprises a floating crane and a stirring ship which are cooperatively positioned through a positioning anchor cable; at least four sets of vertical guide frames are arranged on the broadside of the floating crane ship at equal intervals in the horizontal direction, the guide frames are connected with concrete guide pipes through guide chain mechanisms, the bottoms of the concrete guide pipes are connected with triangular supporting frames, the bottom ends of the triangular supporting frames are supported on a seabed base, and a center collecting hopper is arranged in the middle of the floating crane. The central aggregate bin is communicated with the top end of the concrete guide pipe through a chute, and the stirring ship is provided with a material distributing machine for conveying concrete to the central aggregate bin. According to open sea area deepwater foundation construction, a fixed operation platform cannot be set up, a floating crane and a guide frame are used in cooperation with a stirring ship, and replacement concrete pouring is conducted through a bottom sitting method.

The invention relates to a continuous pouring method for underwater bottom sealing concrete. The continuous pouring method comprises the following steps that S1, construction preparation and guide pipe arrangement are conducted; s2, first-batch concrete is synchronously poured; s3, continuous alternate type circulating pouring is carried out; s4, integrally and synchronously lifting and finally capping; and S5, later maintenance. According to the method, an integral foundation bed is formed through synchronous pouring of multiple guide pipes, and a continuous alternative circulating embedded type pouring process is adopted, so that continuous supply of concrete and uniform control of elevation are realized, and the problems of construction cold joints, leakage risks, complicated working procedures and the like caused by traditional separated bin pouring are effectively avoided; and the integrity, compactness and impermeability of the bottom sealing structure are remarkably improved.

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.

The utility model discloses a light and shade combined gravity type variable-angle concrete chute which is characterized in that a vertical tumbling barrel is erected at an air shaft opening or an elevator shaft opening of an existing structure to reduce the vertical pouring height, and a fastener type steel pipe scaffold is adopted to erect an inclined concrete pouring channel; therefore, large-volume concrete can be rapidly poured through the tumbling barrel and the chute under the action of gravity by reasonably utilizing the structural height difference. The first section of the chute scaffold is arranged on a floor slab and receives concrete falling from the tumbling barrel. The out-of-floor chute scaffold falls on the raft lower iron reinforcing steel bar, and the scaffold steel pipe and the raft lower iron reinforcing steel bar are fixed through a reinforcing steel bar support. The chute concrete channel adopts a structure of a template and a galvanized iron sheet or a corrugated pipe and a galvanized iron sheet, so that the gliding resistance of the chute channel is reduced, meanwhile, variable-angle erection of the chute channel is realized, and the requirements of a raft concrete pouring part are met.

The automatic cleaning system for the concrete guide pipe of the cast-in-place pile has the following beneficial technical effects that conventional steel pipes and steel plates are easy to machine, manufacture and form on site, and the manufacturing process is simple and convenient; and in addition, the cleaning wastewater automatic recovery and cyclic utilization functions are provided, the situation that a construction site is muddy is avoided, and no clear related requirements for the segment length and weight of the guide pipe exist. 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. The cleaning wastewater automatic recovery and cyclic utilization functions are provided, so that the muddy construction site is avoided, and the site construction order is not 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 guide pipe for underwater concrete pouring, and relates to the technical field of concrete guide pipe pouring, the guide pipe comprises a first pipe body and a second pipe body, and the ends, close to each other, of the first pipe body and the second pipe body are fixedly sleeved with a first mounting box and a second mounting box correspondingly; and a mounting mechanism for connecting and fixing the first pipe body and the second pipe body is arranged in the first mounting box. Under the cooperation effect of a connecting plate and the like, a rotary knob is rotated to drive a rotating column and a screw rod to rotate, the screw rod rotates to drive two threaded blocks and two mounting plates to get close to each other, and the two mounting plates get close to each other so that the connecting plate can be clamped and fixed; and the first pipe body and the second pipe body can be further installed and fixed, the first pipe body or the second pipe body does not need to be rotated, manual labor force is reduced, the first pipe body or the second pipe body can be conveniently and rapidly disassembled, and the progress of concrete guide pipe pouring is accelerated.

To provide a tremie pipe which has achieved a quick flow-down of an input material, and to provide an input method of sediment using the tremie pipe.SOLUTION: In a tremie pipe (100) in which a material flows down in a pipe (1), at the upper part of the pipe (1), a discharge pipe (2) is arranged whose inner diameter is smaller than the pipe (1). The tremie pipe can be provided which has achieved a quick flow-down of an input material. Thereby, the separation of the agglomeration of materials can be prevented. Also, increase on the surface area of the agglomeration accompanying the separation can be suppressed, and generation of turbidity in the water can be suppressed.SELECTED DRAWING: Figure 1

The utility model discloses an upside-down hanging well wall concrete pouring device which comprises a profile steel framework, a chute assembly, a material collecting hopper and a flow guide buffering assembly, the profile steel framework is erected in the center of a well wall, and the material collecting hopper and the flow guide buffering assembly can be erected on the profile steel framework; the chute assembly comprises an upper chute and a lower chute, and the upper chute is arranged on the top side of the material collecting hopper; the flow guide buffering assembly comprises a concrete flow guide buffer, a concrete guide pipe, a concrete collecting groove, a rotating device and a groove profile sliding rail, the concrete flow guide buffer is connected to the lower end of the material collecting hopper, the concrete guide pipe is arranged on the lower side of the concrete flow guide buffer, the length of the concrete guide pipe is matched with the depth of the well wall, and the concrete collecting groove is formed below the concrete guide pipe. The pouring device disclosed by the utility model is simple in structure, and can ensure the construction quality of the concrete well wall, save the construction cost and accelerate the progress under the condition that the construction environment is limited.

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.

To provide a construction method of a cast-in-site concrete pile capable of suppressing deterioration of a concrete state upon construction of the cast-in-site concrete pile.SOLUTION: A construction method of a cast-in-site concrete pile comprises: a first tremie pipe pulling-up process stopping supply of concrete in the first tremie pipe 20 and pulling up a first tremie pipe 20 to separate an upper end side of the first tremie pipe 20 as filling concrete into a pile hole 10 through a second tremie pipe 30; and a second tremie pipe pulling-up process stopping supply of concrete in the second tremie pipe 30 and pulling up the second tremie pipe 30 to separate an upper end side of the second tremie pipe 30 as filling concrete into a pile hole 10 through the first tremie pipe 20, in which concrete is filled into the pile hole 10 through the first tremie pipe 20 and the second tremie pipe 30 inserted in the pile hole 10.SELECTED DRAWING: Figure 3

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 utility model relates to the field of building construction, and particularly discloses an engineering pile concrete guide pipe lifting device. The device comprises a mounting frame, a concrete guide pipe used for discharging concrete, a first winding mechanism used for lifting the concrete guide pipe, a concrete vibrating mechanism used for vibrating the concrete and a second winding mechanism used for lifting the concrete vibrating mechanism, and the first winding mechanism is mounted on the mounting frame; the concrete guide pipe is connected with the movable end of the first winding mechanism, the second winding mechanism is installed on the installation frame, the concrete vibrating mechanism is connected with the movable end of the second winding mechanism, and concrete can be vibrated while pouring is conducted by pulling up the concrete guide pipe and the concrete vibrating mechanism. The vibrating device has the advantages of being labor-saving, simple and convenient to operate, good in vibrating quality and wide in operation range.

The invention discloses a semicircular secant pile construction method. The semicircular secant pile construction method comprises the steps that 1, a semicircular steel mold is manufactured; 2, drilling holes are formed in the positions where the secant piles need to be poured through drilling equipment; (3) the local semicircular reinforcement cage is lowered into the drill hole formed in the step (2) through hoisting equipment; 4, the semicircular steel mold manufactured in the step 1 is put down into the drill hole formed in the step 2, and the semicircular steel mold is spliced with the upper part section of the local semicircular reinforcement cage; 5, a concrete guide pipe is inserted into the drill hole, and concrete pouring is conducted; and 6, the semicircular steel mold is pulled out through hoisting equipment, so that the semicircular steel mold is separated from the drilled hole. Compared with a whole pile pouring and half concrete chiseling method, the semicircular secant pile construction method has the characteristics of simplicity, convenience, rapidness and good pile forming quality. And the semicircular mold can be repeatedly used. The construction method can reduce the consumption of concrete and the chiseling of concrete in the later period, and meets the requirement of green construction.