CN113981990A - Concrete supporting structure with profile steel inserted therein and construction method thereof - Google Patents

Abstract

The invention discloses a concrete supporting structure with profile steel inserted therein and a construction method thereof, wherein the concrete supporting structure comprises a profile steel core column and concrete wrapped around the profile steel core column; the section steel core column is inserted before the initial setting of the concrete and is pulled out when being recovered; the section steel core column is coated with a spacer before being inserted into concrete; the concrete supporting structure with the inserted profile steel comprises supporting piles, or double rows of piles, or continuous walls; the shaped steel stem includes: a section steel member extending along and inserted into the pile hole; the hoisting piece is arranged on the profile steel piece and used for hoisting the profile steel core column; the reinforcing piece is arranged perpendicular to the surface of the section steel piece and fixed on the section steel piece; the reinforcing member has a certain length and is fully wrapped with concrete before being recycled so as to enhance the bearing capacity on lateral soil pressure; the reinforcing member is broken when an external force is applied, so that the section steel core column can be pulled out of the concrete during recycling.

Description

Concrete supporting structure with profile steel inserted therein and construction method thereof

Technical Field

Embodiments of the present disclosure relate generally to the field of construction foundation pit support, and more particularly, to a concrete support structure with profile steel inserted therein and a construction method thereof.

Background

With the continuous development of urban construction and the large-scale development of underground spaces, pile anchoring technology in foundation pits is widely applied, and in the field of foundation pit support, the most common method in a building enclosure system is cast-in-place pile technology, for example, a mode of inserting a reinforcement cage in concrete is used for forming a support structure (the inner core of which is the reinforcement cage) such as a slope protection pile or a continuous wall. However, the cast-in-place pile is used as a temporary retaining wall structure of the foundation pit, once the foundation is finished, the mission of the cast-in-place pile is ended, a large amount of reinforcing steel bars buried in the cast-in-place pile cannot be recycled at the moment, the problems of environmental pollution, water and soil pollution, metal loss and the like can be caused, and the concept of resource conservation and environmental friendliness under the background of double carbon at present is not met. In addition, because for example the preparation of steel reinforcement cage and cost of transportation are higher, the steel reinforcement cage needs the position calibration at transferring the in-process, and can appear steel reinforcement cage deformation scheduling problem, consequently strut the effect and can receive great influence in actual construction.

The existing SMW (Soil Mixing Wall, called SMW for short) construction method is a method for inserting section steel into a cement Mixing pile, and is characterized in that H-shaped steel or other section steel is inserted into the cement Mixing pile to combine load bearing and seepage prevention and water retaining to form a supporting structure with two functions of stress and seepage prevention. In the existing SMW construction method, a layer of antifriction agent is coated on the surface of the section steel, so that the section steel can be recycled after the foundation construction is finished. However, in the SMW method, the profile steel is used as the built-in steel skeleton to bear the lateral soil pressure, and the surface of the profile steel needs to be coated with a layer of friction reducer so as to be recycled after the foundation construction is completed, so that the interface bonding force between the profile steel and the cement soil in the cement soil and the overall bond stress are low, so that the profile steel cannot bear strong lateral soil pressure on the whole, and the SMW method cannot be applied to scenes such as deep foundation pits and the like which need to bear strong lateral soil pressure.

The main structure of the building field has a combined structure of section steel concrete, namely, the section steel is embedded in the reinforced concrete, and the structure adds the section steel in the reinforced concrete, and the section steel has inherent strength and ductility, so compared with the traditional reinforced concrete structure and the existing SMW construction method, the section steel, the reinforcing steel and the concrete work in a three-in-one manner, and the section steel concrete structure has the advantages of large bearing capacity, large rigidity, good earthquake resistance, and good local and overall stability of the structure. However, the process is only used for main structures (such as stiff columns) in the field of buildings, cannot realize the recovery of steel bars and section steel, is high in cost, and is not used as an underground supporting structure at present.

Therefore, a supporting technology which can recover section steel and is suitable for scenes needing to bear stronger lateral soil pressure, such as deep foundation pits, is needed.

Disclosure of Invention

The invention mainly aims to provide a concrete supporting structure with profile steel inserted therein and a construction method thereof, so as to solve the above problems and other potential problems in the prior art.

In order to achieve the purpose, the invention provides a concrete supporting structure with profile steel inserted inside, which comprises a profile steel core column and concrete wrapped around the profile steel core column; the section steel core column is inserted before the initial setting of the concrete and is pulled out when being recovered; the section steel core column is coated with a spacer before being inserted into the concrete; the concrete supporting structure with the inserted profile steel comprises supporting piles, or double rows of piles, or continuous walls; the concrete supporting structure with the inserted profile steel comprises supporting piles, or double-row piles, or continuous walls; the shaped steel stem column comprises a shaped steel part, a hoisting part and a reinforcing part: the steel section extends along the pile hole and is inserted into the pile hole; the hoisting piece is arranged on the section steel piece and used for hoisting the section steel core column; the reinforcing part is arranged perpendicular to the surface of the section steel part and is fixed on the section steel part; wherein the reinforcement has a length and is sufficiently wrapped with concrete prior to recovery to enhance resistance to lateral soil pressure; the reinforcing member is broken when an external force is applied, so that the steel section core column can be pulled out of the concrete during recycling.

According to an embodiment of the invention, said sling comprises at least one of: lifting eye, lug, hoist.

According to the embodiment of the invention, the lifting holes are symmetrically arranged on two sides of the section steel piece; the lifting lugs are symmetrically arranged on two sides of the section steel piece.

According to an embodiment of the invention, the reinforcement comprises at least one of: a plastic screw; the plastic bolt and the nut are matched with each other; a plastic screw; a plastic stud; a plastic pin; plastic rivets.

According to an embodiment of the invention, the reinforcement is evenly arranged on the surface of the steel profile.

According to an embodiment of the invention, the steel profile comprises at least one of: h-shaped steel, angle steel, channel steel, steel pipes, I-shaped steel and steel sheet piles.

According to an embodiment of the present invention, the H-section steel includes first and second flanges disposed parallel to each other, and a web disposed vertically between the first and second flanges.

According to an embodiment of the invention, said sling comprises a first lifting eye provided on said first flange, and/or a second lifting eye provided on said second flange; the first lifting hole and the second lifting hole are symmetrically arranged.

According to an embodiment of the invention, the reinforcement comprises at least one of: the first plastic bolt is arranged on the first flange, the second plastic bolt is arranged on the second flange, and the third plastic bolt is arranged on the web.

According to the embodiment of the invention, the first flange is provided with a first screw hole corresponding to the first plastic bolt, the second flange is provided with a second screw hole corresponding to the second plastic bolt, and the web is provided with a third screw hole corresponding to the third plastic bolt.

According to the embodiment of the invention, the first plastic bolt is further provided with a matched first nut, the second plastic bolt is further provided with a matched second nut, and the third plastic bolt is further provided with a matched third nut.

According to an embodiment of the invention, the concrete forms columns of concrete, which are connected to each other by top crown beams, the extension direction of which is perpendicular to the columns of concrete.

According to an embodiment of the invention, the spacer comprises at least one of: antifriction agent, release agent, lubricating oil, wax and heat shrinkable tube.

A second aspect of the present invention provides a method of constructing a concrete supporting structure with a section steel inserted therein, characterized in that the method is capable of forming the concrete supporting structure with a section steel inserted therein according to the first aspect of the present invention.

According to an embodiment of the present invention, the construction method includes: manufacturing the section steel core column, and coating the separator on the section steel core column; and inserting the steel section core column coated with the spacers into the concrete before initial setting so as to form the concrete supporting structure with the steel sections inserted inside.

According to an embodiment of the present invention, the method for constructing a concrete supporting structure with steel sections inserted therein further includes: and during recovery, applying external force to the steel core column to reach the limit bearing capacity of the reinforcing piece, so that the reinforcing piece is broken to pull out the steel core column.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural view of a steel section stem (without reinforcing members mounted) according to an exemplary embodiment of the present invention.

Fig. 2 is a schematic structural view of a section steel core limb (with reinforcing members mounted) according to an exemplary embodiment of the present invention.

Fig. 3 is a schematic cross-sectional structure of fig. 2 in one direction.

Fig. 4 is a schematic cross-sectional structure view of fig. 2 in another direction.

Fig. 5 is a schematic structural diagram of a section steel core column in a concrete column according to an embodiment of the invention.

Fig. 6 is a schematic structural view of a section steel core column, a crown beam and the like according to an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.

In practice, the inventor of the present invention finds that the steel sections are embedded in the concrete to form an independent structural form, and the structural form is added in the concrete, and the steel sections have inherent strength and ductility, so that compared with the traditional reinforced concrete structure, the steel sections and the concrete work integrally, and the steel reinforced concrete structure has the advantages of large bearing capacity, large rigidity, good earthquake resistance, and good local and overall stability of the structure. Particularly, in order to realize the recycling of the section steel, the section steel is further coated with a spacer in the embodiment of the invention. In order to enhance the bearing capacity of lateral soil pressure, the embodiment of the invention also creatively designs the structure of the section steel, and specially designs the structure of the reinforcing part 3, so that the section steel can be suitable for a scene with higher requirement on the bearing capacity of the lateral soil pressure, such as a deep foundation pit.

As shown in fig. 1 to 6, an embodiment of the present invention provides a concrete supporting structure with a section steel inserted therein, including a section steel core column 100 and concrete 200 wrapped around the section steel core column 100. The section steel core column 100 is inserted before the initial setting of the concrete 200 and is pulled out when it is recovered. The section steel core column 100 is coated with a spacer (not shown) before being inserted into the concrete 200.

Compared with the traditional reinforced concrete structure, the structural steel and the concrete can work integrally and stress calculation is included, so that the structural steel concrete structure has the advantages of large bearing capacity, high rigidity, good anti-seismic performance, and good local and overall stability.

According to an embodiment of the present invention, the section steel inserted concrete supporting structure includes a fender pile, or a double row pile, or a continuous wall. By way of example, a fender pile is a pile that primarily bears lateral thrust, and is generally used for foundation pit support, slope support, and landslide control, and bears horizontal soil pressure or landslide thrust. By way of example, the double-row piles are supporting and retaining structures which are arranged along the side wall of the foundation pit and are composed of rigid frames and crown beams formed by connecting front and rear rows of supporting piles and beams. As an example, a continuous wall is also called an underground continuous wall, which is a continuous concrete wall built underground in foundation engineering and used as a structure for intercepting water, preventing seepage, bearing and retaining water.

According to an embodiment of the invention, the profiled steel core limb comprises: shaped steel 1, hoisting accessory 2, and reinforcement 3. Wherein the steel section 1 extends along and is inserted into the pile hole. And the hoisting piece 2 is arranged on the section steel piece 1 and used for hoisting the section steel core column. The reinforcing element 3 is arranged perpendicular to the surface of the section steel part 1 and is fixed on the section steel part 1.

Wherein the reinforcement 3 has a length and is in sufficient contact with the concrete (e.g. sufficiently wrapped or gripped) prior to recovery to enhance the ability to withstand lateral earth pressure; the reinforcing member 3 is broken when an external force is applied (for example, when the external force reaches the ultimate bearing capacity of the reinforcing member 3, the reinforcing member 3 is caused to reach the ultimate stressed state, so that the reinforcing member 3 is broken), so that the steel core column can be pulled out of the concrete during recovery. That is, the reinforcing member 3 of the present invention can achieve the technical effect of "relaxation", can enhance the bearing capacity to the lateral soil pressure before recovery (i.e., "tension effect"), and can be broken when recovery is required so as to facilitate the extraction and recovery of the section steel core column (i.e., "relaxation effect").

It should be understood that, in the embodiment of the present invention, since the structure of the reinforcing member 3 (which is disposed perpendicular to the surface of the section steel member 1 and has a certain length) is specially designed in the section steel core column, the bearing capacity to the lateral soil pressure (for example, in the direction perpendicular to the pile hole) can be enhanced, and at this time, the interface bonding force between the section steel and the concrete in the concrete and the overall bond stress can be enhanced, so that the overall supporting structure can bear stronger lateral soil pressure, and thus, the supporting structure can be suitable for a deep foundation pit and other scenes needing to bear stronger lateral soil pressure. In addition, the section steel core column with the structure of the reinforcing part 3 is adopted in the embodiment of the invention, so that the section steel core column is different from the traditional technology and a supporting structure, and can be suitable for a section steel concrete structure needing stronger bearing capacity (at the moment, the concrete and the section steel can act together, the interface bonding force and the bond stress between the section steel and the concrete can be improved, and the requirement on the stronger bearing capacity of the section steel core column is met).

According to an embodiment of the invention, said sling 2 comprises at least one of the following: lifting eye, lug, hoist. As an example, the hanging hole may be a hole portion provided on the steel profile 1, such as a round hole or a square hole. The lifting lug can be a lifting lug welded on the section steel part 1 (or integrally formed). The lifting appliance is an independent or auxiliary lifting tool, and can clamp the section steel piece 1 to realize the function of lifting the section steel core column. In the hoisting process, a separate crane and other equipment are needed to realize hoisting, so that the section steel core column is inserted into the pile hole below the ground along the pile hole.

According to the embodiment of the invention, the hanging holes are symmetrically arranged on two sides of the steel section 1; the lifting lugs are symmetrically arranged on two sides of the section steel part 1. As an example, lifting holes or lifting lugs may be symmetrically arranged on both sides of the steel profile 1 to facilitate lifting from both side positions (e.g. inserting a lifting hook).

According to an embodiment of the invention, said reinforcement 3 comprises at least one of the following: a plastic screw; the plastic bolt and the nut are matched with each other; a plastic screw; a plastic stud; a plastic pin; plastic rivets.

It should be understood that the material of the reinforcing member 3 in the present invention is preferably plastic, such as nylon, which is an original design made by the inventor in consideration of the design requirement of the supporting structure in the field of construction, and the above-mentioned purpose and effect of "relaxation" can be achieved. That is, the plastic reinforcing member 3 can be conveniently mounted on the steel profile 1, so that the bearing capacity to lateral soil pressure is enhanced; also can break off under certain external force (for example, external force when reaching the ultimate bearing capacity of reinforcement 3, can make reinforcement 3 reach ultimate atress state to break off), thereby make things convenient for the shaped steel stem to extract and retrieve.

By way of example, plastic screws are a type of fastener that progressively tightens using the physics and mathematical principles of the object's beveled circular rotation and friction. Plastic screws, which may also be referred to as plastic screws, are generally cylindrical in shape and grooves with indentations in the surface are referred to as threads. In this case, for example, the structure of the section steel member 1 that cooperates with the plastic screws may be a screw thread (in this case, the section steel member 1 may be perforated and then threaded).

By way of example, a plastic bolt is a nut-on-nut cylindrical threaded fastener of the type consisting of a head and a shank (externally threaded cylinder) that are to be mated with a nut, and this type of connection is known as a bolted connection. The nut can be unscrewed from the bolt, so the bolt connection is a detachable connection. The plastic bolts and nuts that cooperate with each other are simpler and more practical than plastic screws, and it is not necessary to form holes with threads on section steel member 1, and therefore they are simpler to process and less costly (for example, only punch holes on section steel member 1, then insert plastic bolts, and then screw plastic nuts or metal nuts).

By way of example, a plastic screw is a cylinder with a spiral groove cut in the outer surface or a cone with a conical spiral groove cut in the outer surface. The plastic screws may have different heads, including, for example, outer hex screws, large flat screws, etc. By way of example, a plastic stud is a cylindrical fastener that is threaded on both ends. By way of example, plastic pins refer to a class of fasteners used primarily for assembly positioning, and are of the type cylindrical pins, conical pins, apertured pins, split pins, and the like. By way of example, a plastic rivet is a nail-shaped article, a type of fastener that is riveted in a clinching process using a self-deforming or interference connection.

According to an embodiment of the invention, the reinforcement 3 is uniformly arranged on the surface of the steel profile 1. It will be appreciated that the stiffeners 3, which are uniformly distributed on the surface of the section steel 1, facilitate the calculation of the stresses, the machining and the fabrication thereof. For example, plastic screws can be arranged on the surface of the H-shaped steel at equal intervals of 100mm, so that the bond stress between the H-shaped steel 1 and concrete is increased in a service stage (working stage), and the reinforcing element 3 can be brittle and loses an acting force instantly after being provided with a certain tensile force (for example, the reinforcing element 3 made of plastic is determined by the property of the material and can be broken under a certain external force), so that the steel core column is easy to pull out in a recovery stage.

According to an embodiment of the invention, said profiled steel element 1 comprises at least one of the following: h-shaped steel, angle steel, channel steel, steel pipes, I-shaped steel and steel sheet piles. By way of example, the profile 1 according to the invention can be an H-profile, an angle, a channel, a steel pipe, an i-steel, a steel sheet pile. For example, angle iron is a long steel bar whose two sides are perpendicular to each other to form an angle. The channel steel is a long steel material having a groove-shaped cross section, and is a structural carbon steel material having a complicated cross section, which is used for construction and machinery. As an example, an i-steel, also called a steel beam, is a long steel material having an i-shaped cross section. By way of example, steel sheet piles are steel structures with linkages at their edges and which can be freely combined to form a continuous tight retaining or retaining wall, including for example larsen steel sheet piles (also called U-shaped steel sheet piles, which are used primarily as retaining, sand retaining walls in bridge and cofferdams, large pipe laying, temporary trench excavation, retaining walls in docks, unloading yards, retaining walls, embankment revetments, etc.).

According to an embodiment of the present invention, the H-section steel includes a first flange 11 and a second flange 12 disposed parallel to each other, and a web 13 disposed vertically between the first flange and the second flange. By way of example, the H-section steel is mainly composed of two flanges parallel to each other and a web located therebetween. The H-shaped steel is an economic section efficient section with more optimized section area distribution and more reasonable strength-to-weight ratio. Because each part of the H-shaped steel is arranged at a right angle, the H-shaped steel has the advantages of strong bending resistance, simple construction, cost saving, light structure weight and the like in each direction.

According to an embodiment of the invention, said sling 2 comprises a first lifting hole 21 provided on said first flange 11 and/or a second lifting hole 22 provided on said second flange 12; the first hanging hole 21 and the second hanging hole 22 are symmetrically arranged. As an example, the steel core column can be conveniently hoisted through the design of the hoisting holes which are symmetrically arranged with each other.

According to an embodiment of the invention, said reinforcement 3 comprises at least one of the following: a first plastic bolt 31 provided on the first flange 11, a second plastic bolt 32 provided on the second flange 12, and a third plastic bolt 33 provided on the web 13. As an example, the plastic bolts may be arranged on the flanges and webs of the H-section steel, for example, in an evenly distributed manner, so as to enhance the bearing capacity against lateral soil pressure in the direction perpendicular to the pile hole.

According to the embodiment of the present invention, the first flange 11 is provided with a first screw hole 34 corresponding to the first plastic bolt 31, the second flange 12 is provided with a second screw hole 35 corresponding to the second plastic bolt 32, and the web 13 is provided with a third screw hole 36 corresponding to the third plastic bolt 33. For example, the first screw hole 34, the second screw hole 35 and the third screw hole 36 may be directly formed on the H-beam through a punching process.

According to the embodiment of the present invention, a first nut 37 is further disposed on the first plastic bolt 31, a second nut 38 is further disposed on the second plastic bolt 32, and a third nut 39 is further disposed on the third plastic bolt 33. For example, the first nut 37, the second nut 38 and the third nut 39 may be plastic nuts or metal nuts.

As shown in fig. 5 to 6, according to the embodiment of the present invention, the concrete 200 forms a concrete column, and the concrete columns are connected to each other by a top crown beam 300, and the extension direction of the crown beam 300 is perpendicular to the concrete column. The design of the crown beam 300 may make the overall structure more stable and stable.

According to an embodiment of the invention, the spacer comprises at least one of: antifriction agent, release agent, lubricating oil, wax and heat shrinkable tube. For example, the friction reducing agent is a material applied to the surface of the inserted steel section before the insertion of the steel section in order to reduce the frictional resistance at the time of removal when the steel section needs to be recovered. By way of example, the release agent is an interfacial coating that provides easy release, smoothness and cleanliness of the object surface. As an example, the lubricating oil is interposed between two objects, and has a function of reducing friction generated by the contact between the two objects. By way of example, the heat shrinkable tube is a special polyolefin heat shrinkable sleeve, which can play a role of isolation and can be coated on the surface of the section steel under the condition of heating.

An exemplary embodiment of a construction method of a concrete supporting structure in which section steel is inserted.

The invention also provides a construction method of the concrete supporting structure with the inserted section steel, and the construction method can form the concrete supporting structure with the inserted section steel. Specifically, the construction method of the embodiment of the present invention may include the following steps.

Step S1000: the section steel core column 100 is manufactured, and the separator is coated on the section steel core column 100. For example, when the section steel core column 100 is manufactured, the section steel to be drilled can be placed on a relatively flat ground (the drilled place can be marked and positioned); then, clockwise punching and cutting are carried out (the rotating speed can be controlled at the moment to prevent over-speed) aiming at the position where the marking line is positioned, and clear water can be prepared to radiate the heat of the drill bit during punching; after the hole is punched, the burr around the hole can be removed by using a grinder blade.

Step S2000: inserting the steel core column 100 coated with the spacers into the concrete 200 before initial setting so as to form a concrete supporting structure of the inserted steel. Preferably, the steel core column 100 coated with the spacers may be inserted into the concrete 200 before initial setting and aligned to form a concrete supporting structure of the inserted steel.

By way of example, the structure of the steel core column of the present invention can be applied to a concrete environment, and in this case, the construction method of the present invention can be used in a concrete environment. It will be appreciated that the steel section core coated with the friction reducing agent is inserted into the pile hole and contacted with the concrete, so that the concrete is wrapped around the steel section core, and then the integral structure of the supporting structure mentioned in the above embodiment of the invention can be formed.

According to an embodiment of the present invention, the method for constructing a concrete supporting structure with a section steel inserted therein further includes the step S3000: at the time of recovery, an external force is applied to the steel core limb 100 to reach the ultimate bearing capacity of the reinforcing member 3, so that the reinforcing member 3 is broken to pull out the steel core limb 100. As an example, before the concrete is initially set, a steel section core column should be inserted. And when retrieving (in the recovery process promptly, foundation ditch basic construction finishes this moment, and backfill earthwork reaches ground elevation moreover, when needing to retrieve the shaped steel stem), should extract the shaped steel stem to realize retrieving the purpose. During recovery, a jack and a jacking reaction frame can be installed, so that the section steel can be pulled out.

Taking the construction of engineering slope protection piles by adopting a rear-inserted section steel pouring construction process as an example, the construction of a supporting structure can be carried out according to the following construction process, and the construction method mainly comprises the following steps: pile position paying-off → section steel processing → drilling machine positioning → hole forming → concrete pouring → section steel lowering → crown beam manufacturing → section steel recovery.

1) And (3) paying off the pile position: firstly, the pile position is strictly measured and placed according to a foundation pit supporting plane graph, firstly, a transverse control axis and a longitudinal control axis are placed, the central axis of the pile is placed according to the control axis, the standard pile position of each side is determined, and other pile positions are sequentially measured and placed according to the standard pile positions. And secondly, vertically punching the pile position by using a thick reinforcing steel bar, wherein the hole depth is not less than 0.50m, pouring lime into the hole, and inserting a thin reinforcing steel bar head as a mark. And thirdly, after the pile position is set, please measure and check the first party, the supervision party, the general packaging party and the related units, and the pile can be driven after the pile position is confirmed to be correct.

2) Processing the section steel: and manufacturing the section steel according to a design drawing. Requiring the welder to maintain the certification for post work. Before the slope protection pile is started, 3 section steels are manufactured in advance, and large-scale centralized processing is performed after a construction site engineer and a supervision engineer are required to check the section steels to be qualified. Before the cast-in-place pile is formed into a hole, at least 10 section steels are processed. 20-30 section steel are used as an acceptance lot, and are transported to a designated place for stacking after being checked by a supervision engineer, so that the maximum stacking layer number is less than or equal to 3 for preventing deformation.

3) Drilling in place: the drilling machine adopts a long spiral drilling machine. Under the command of ground personnel, a driller aligns the center point of a drill bit of the drilling machine to a pre-placed pile point position, and adjusts the drill rod and the drill supporting leg to ensure that the drill rod is vertical.

4) Forming holes: before the cast-in-place pile is completely constructed, on-site trial drilling is preferably carried out to observe the hole forming effect and determine a hole forming drill and a hole forming process, and a site engineer and a supervision engineer need to be informed in advance of the trial drilling. Before each drilling, the drill can be drilled under the condition that concrete is prepared. During drilling, guidance is paid attention, and when deflection and obstacle are met, reasons are analyzed and measures are taken for treatment. The hole-forming recorder should make the measurement every time. The records must be carefully filled in time according to the requirements of the form, the recorded data is required to be complete and real and cannot be changed, and the drilling condition and the matters to be noticed in the next shift are required to be changed when the shift is changed.

5) Pouring concrete: the technology of 'long spiral drilling machine hole forming and central concrete pressure pouring' is adopted. And (3) the drilling machine drills to the designed hole depth, the concrete is injected by pressure, and the concrete is injected to the position which is 30-50 cm higher than the designed elevation of the pile top along with the lifting of the drilling tool. For this construction method, the procedures of hanging the section steel and pouring concrete should be exchanged, i.e. the section steel is inserted after the concrete is poured. The section steel is hung in the truck crane to enter the hole, and a special vibrator can be adopted to vibrate the concrete so as to facilitate the section steel to sink into the designed depth. The concrete is commercial concrete. The pile after hole forming should be poured as soon as possible.

6) And (3) lowering section steel: after the pile is formed into a hole, the drilling machine is quickly moved away, and the time for finishing the hole and pouring concrete is shortened as much as possible. And immediately organizing personnel and a truck crane to carry out the section steel hoisting process. The section steel must be inspected qualified and the rear can be used, and the section steel is transferred and hung down by a crane.

7) Manufacturing a crown beam: before the construction of the crown beam, the pile top is measured according to the elevation required by design, and the pile head drilling work is required for the cast-in-place pile with the elevation exceeding the requirement of 10 cm. The pile drilling head adopts a pneumatic air pick, and the pile drilling is required to be smooth. And after the pile drilling operation is finished, the construction of the crown beam is started. The construction of the crown beam is carried out in sections, and a groove is directly dug in soil to be used as a mold. During construction, accurate paying-off, consistent mould depth, straight mould wall and collapsed soil are required, and the mould can be leveled by using lime soil or supported by using a template. And (5) paying attention to maintenance after the crown beam is poured.

8) And (3) recovering section steel: during recovery, a jack and a jacking reaction frame can be installed, so that the section steel can be pulled out.

From the above description of the embodiments, it will be clear to those skilled in the art that the present invention may be implemented by other structures, and the features of the present invention are not limited to the above preferred embodiments. Any changes or modifications that can be easily conceived by those skilled in the art are also intended to be covered by the scope of the present invention.

Claims (16)

1. The concrete supporting structure with the inserted section steel is characterized by comprising a section steel core column (100) and concrete (200) wrapped around the section steel core column (100); the section steel core column (100) is inserted before the initial setting of the concrete (200) and is pulled out during recovery; the section steel core column (100) is coated with a spacer before being inserted into the concrete (200);

the concrete supporting structure with the inserted profile steel comprises supporting piles, or double rows of piles, or continuous walls; the profile steel core column comprises a profile steel part (1), a hoisting part (2) and a reinforcing part (3):

the section steel piece (1) extends along a pile hole and is inserted into the pile hole; the hoisting piece (2) is arranged on the section steel piece (1) and used for hoisting the section steel core column; the reinforcing part (3) is arranged perpendicular to the surface of the section steel part (1) and is fixed on the section steel part (1);

wherein the reinforcement (3) has a certain length and is sufficiently wrapped with concrete before being recycled to enhance the bearing capacity to lateral soil pressure;

the reinforcing element (3) is broken when an external force is applied, so that the steel core column can be pulled out of the concrete during recovery.

2. The concrete supporting structure with inserted section steel according to claim 1, wherein said sling (2) comprises at least one of the following: lifting eye, lug, hoist.

3. The concrete supporting structure with the inserted section steel according to claim 2, wherein the hanging holes are symmetrically arranged at both sides of the section steel member (1); the lifting lugs are symmetrically arranged on two sides of the section steel piece (1).

4. The concrete supporting structure of the inserted steel sections according to claim 1, wherein the reinforcing member (3) includes at least one of: a plastic screw; the plastic bolt and the nut are matched with each other; a plastic screw; a plastic stud; a plastic pin; plastic rivets.

5. The concrete supporting structure with the section steel inserted thereinto according to claim 1, wherein the reinforcing members (3) are uniformly provided on the surface of the section steel member (1).

6. The concrete supporting structure with steel profiles inserted therein according to any one of claims 1 to 5, characterized in that the steel profiles (1) comprise at least one of the following: h-shaped steel, angle steel, channel steel, steel pipes, I-shaped steel and steel sheet piles.

7. The concrete supporting structure of the inserted section steel as claimed in claim 6, wherein the H-section steel includes a first flange (11) and a second flange (12) which are disposed parallel to each other, and a web (13) which is disposed between the first flange and the second flange and is disposed vertically.

8. The concrete supporting structure with inserted section steel according to claim 7, wherein the sling (2) comprises a first sling hole (21) provided on the first flange (11) and/or a second sling hole (22) provided on the second flange (12); the first hanging hole (21) and the second hanging hole (22) are symmetrically arranged.

9. The concrete supporting structure of the inserted steel sections according to claim 7 or 8, characterized in that the reinforcement (3) comprises at least one of the following: the first plastic bolt (31) is arranged on the first flange (11), the second plastic bolt (32) is arranged on the second flange (12), and the third plastic bolt (33) is arranged on the web (13).

10. The concrete supporting structure with the inserted section steel according to claim 9, wherein the first flange (11) is provided with a first screw hole (34) corresponding to the first plastic bolt (31), the second flange (12) is provided with a second screw hole (35) corresponding to the second plastic bolt (32), and the web (13) is provided with a third screw hole (36) corresponding to the third plastic bolt (33).

11. The concrete supporting structure with the inserted steel bars as claimed in claim 9, characterized in that the first plastic bolt (31) is further provided with a first matching nut (37), the second plastic bolt (32) is further provided with a second matching nut (38), and the third plastic bolt (33) is further provided with a third matching nut (39).

12. The profile-steel-inserted concrete supporting structure according to any one of claims 1 to 5, wherein the concrete (200) forms concrete columns which are connected to each other by a top crown beam (300), and the extension direction of the crown beam (300) is perpendicular to the concrete columns.

13. The concrete supporting structure with steel sections inserted thereinto according to any one of claims 1 to 5, wherein the spacers include at least one of: antifriction agent, release agent, lubricating oil, wax and heat shrinkable tube.

14. A method of constructing a concrete supporting structure with a section steel inserted therein, wherein the method is capable of forming the concrete supporting structure with a section steel inserted therein according to any one of claims 1 to 13.

15. The construction method of a section steel-inserted concrete supporting structure according to claim 14, comprising:

manufacturing the section steel core column (100), and coating the partition on the section steel core column (100);

inserting the steel section core column (100) coated with the spacers into the concrete (200) before initial setting so as to form the concrete supporting structure of the inserted steel section.

16. The method of constructing a concrete supporting structure with a section steel inserted thereinto according to claim 15, further comprising:

and during recovery, applying external force to the steel core column (100) to reach the limit bearing capacity of the reinforcing piece (3), so that the reinforcing piece (3) is broken to pull out the steel core column (100).

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