RU34952U1 - Reinforced concrete drill string - Google Patents

Reinforced concrete drill string Download PDF

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Publication number
RU34952U1
RU34952U1 RU2003123296U RU2003123296U RU34952U1 RU 34952 U1 RU34952 U1 RU 34952U1 RU 2003123296 U RU2003123296 U RU 2003123296U RU 2003123296 U RU2003123296 U RU 2003123296U RU 34952 U1 RU34952 U1 RU 34952U1
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Prior art keywords
column
diameter
reinforcing cage
foundation
supporting
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RU2003123296U
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Russian (ru)
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П.Б. Юркевич
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ООО "Инженерное бюро Юркевича"
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5 10 15 20
I / III IIMI iirii fiiii n ". DRILLING REINFORCED CONCRETE COLUMN 1. Technical field The utility model relates to construction, especially in cramped conditions, in particular to monolithic erection of elements of buildings and structures, namely supporting reinforced concrete elements. 2. The level of technology. A device is known for transmitting pressure to underlying dense layers of soil, formed by filling concrete with drilled wells. / Brief Polytechnical Dictionary.-M: State Publishing House of Technical and Theoretical Literature, 1956, p. 830, ref .. A device in the form of a vertical support is known to support the elements of the building floors / Brief Polytechnical Dictionary.-M: State Publishing House technical literature, 1956, p. 429, ref.column. Known columns with mating elements in the levels of overlap, made with the formation of the shell, as well as columns not only of circular cross section, but also square. (Pat. RF No. 2197578, IPC (7) Е04В 1 / 18,2000). For columns of arbitrary cross section, the equivalent diameter can serve as a distinguishing feature - the maximum distance from the geometric center of the cross section of the column to the second-order curve (circle, ellipse, etc.) described around the points of the contour of the section of the column (Semendyaev Mathematics Manual.-M .: -M .: Publishing house Fiz.-mat Literature, 1962, p. 167,219,428) A reinforced concrete support containing a core filled with concrete mix including reinforcement and MPC (7) Е 04C 5/01 5 Ч 10 15 20 is also known accepted by the applicant for the closest analogue known devices - the impossibility of combining work of the zero cycle with the construction of elements of a building or structure above the zero mark. 3. The essence of the utility model 3.1. The result of solving a technical problem. EFFECT: simultaneous erection of supporting foundations and structural elements of a building or structure, increasing the accuracy of their erection, the possibility of erecting a building, structure simultaneously up and down below the zero mark. 3.2. List of figures of drawings. Figure 1 shows an example of a construction of a reinforced concrete drill string with the placement of non-removable formwork in the upper supporting part of the column, in Fig. 2, section 1-1 in Fig. 1 at the level of communication nodes with ceilings by means of embedded parts with radial ribs, in Fig. 3 - section 2-2 in FIG. 1 at the level of the communication node with the foundation plate by means of a embedded part with radial ribs, in FIG. 4, the communication node with overlap at the stage of insertion into the drill string, in FIG. 3 - the communication node with overlap at the stage of completing additional stiffeners and jaws elitelnyh plates, FIG. 6 - communication node with overlap at the stage of fixing the working reinforcement of the overlap, FIG. 7 - communication node with the foundation plate at the stage of insertion into the drill string, in FIG. 8 - a communication unit with a foundation plate at the stage of performing additional stiffening ribs and distribution plates, FIG. 9 communication center with the base plate at the stage of fixing the working reinforcement of the base plate, where 1 is the upper supporting part of the column, 2 is the non-removable 2 5 10 15 20 (upper part), 6 is the reinforcing cage (lower part), 7 is the embedded part with radial ribs for communication with non-closure, 8 - embedded part with radial ribs for communication with the foundation plate, 9 - insertion zone of the communication node with overlap, 10 - additional stiffeners for communication with overlap, 11 - distribution plates for communication with overlap, 12 - working floor reinforcement, 13 - zone ki communication unit with the base plate, 14 - additional stiffening ribs for connection with the foundation slab 15 - Distribution plate for connection with the foundation slab, 16- working armature base plate. 3.3. Features. A reinforced concrete column, in contrast to the known one, is made with the possibility of installing it in a borehole, consists of an upper supporting and lower foundation parts, the core is made in the form of structures of a reinforcing cage of a column placed in an indelible formwork with an equivalent maximum outer diameter of the column by a (2sr + 2L + 2t), where DK is the equivalent outer diameter of the column, DC is the diameter of the borehole, and vg is the eccentricity of the projection of the geometric axis and the projection of the axis of the center of mass of the column in the plane of suspension (top) of the column, L from lonenie axis of the borehole from vertical, t - axis offset borehole in the plan; communication nodes are located in the upper supporting part of the column at the level marks of floor slabs and the base plate in the form of embedded parts from closed loops with stiffeners. Reinforced concrete column can be made of steel, non-recoverable formwork - from a pipe of round or square section, in a particular case, non-recoverable formwork is placed in the upper supporting part of the column; a part of the reinforcing cage located in the lower part of the foundation part of the column, 3 5 10 15 20 the upper supporting part with sealing elements of the reinforcing cage, while the equivalent outer diameter of the part of the reinforcing cage located in the upper supporting part of the column is equal to or less than the inner diameter of the non-removable formwork, equivalent the inner diameter of the part of the reinforcing cage located in the lower foundation of the column is equal to or greater than the outer diameter of the non-removable formwork. Communication nodes located in the upper part of the column at the elevation levels of the floor slabs and the base plate are arranged by inserting into the drill string, which allows the most reliable keyway support of floor slabs and the base plate on the drill string according to the principle of concrete on concrete without taking into account the work of the formwork pipe in order to ensure the necessary fire resistance of the supporting structures for underground structures. The insertion of floor slabs and foundation slabs in communication centers is carried out to embedded parts in the form of closed loops with stiffeners and with additional stiffening ribs and distribution plates to fix the working reinforcement of the floor slabs and foundation slabs. The column is arranged as follows. The reinforced concrete column (Fig. 1) is made with the possibility of installing it in a borehole, contains a core monolithic with concrete mix, including reinforcement in the form of a reinforcing cage (5, 6) and communication units with ceilings and a foundation plate made in the form of embedded parts (7, 8) columns having a closed loop with stiffeners. The column is divided into the upper part (1) (supporting) and the lower part (3) (foundation) with an equivalent diameter DC, the reinforcing cage is placed in a non-removable formwork (2), and in a particular case 4
5 10 15 20 in the case of the upper and lower parts of the reinforcing cage are overlapped with the seal (4) to ensure tight connection and unity of the frame of the upper and lower parts. The column is made with a maximum outer diameter of the column by a value (28g + 2D + 2 t) to compensate for the eccentricity of the column and compensate for drilling defects during the construction of the well, which provides increased accuracy in the installation of the column in the design position. The upper part of the column reinforcing cage (5) is assembled from working longitudinal and distribution annular or spiral rods and practically does not differ from the reinforcing cage of a traditional bzfonabile pile. To de-energize the connection between the drill string and the floor slabs of the underground floors and the foundation slab, embedded parts (7, 8) are installed in the reinforcing cage of the upper part (5) in the form of pipes of smaller diameter with radially welded stiffeners. The diameter of the embedded pipes is less than the diameter of the non-removable pipe formwork (2) by twice the width of the support annular mortise console, which allows the floors and foundation plate to be supported on the drill string according to the principle of concrete on concrete without taking into account the work of the formwork pipe (2), which ensures the fire resistance necessary for underground structures bearing constructions. The length of the embedded parts (7, 8) is taken to be at least equal to the sum of the thickness of the non-overlapping (foundation plate) in the nodes of communication with the drill string and the triple value of the mounting tolerance but the height of the core of the column (3x100 mm). The stiffening ribs radially welded to the embedded pipe compensate for the weakening of the bearing capacity of the column during concrete cutting when performing support mortise consoles of communication nodes with ceilings and foundation slab. Stiffening ribs also serve for coaxial joining of longitudinal working rods of the upper 5 5 10 15 20 Mortise nodes of the drill string with floor slabs are welded by welding to embedded parts with radially welded stiffeners (7) of additional stiffening ribs (10) and distribution plates ( 11) for fixing the working reinforcement of the floors (12). Mortise nodes of the drill string and foundation plate are welded by welding to embedded parts with radially welded stiffeners (8) of additional stiffeners (14) and distribution plates (15) to secure the working reinforcement of the base plate (16). The upper part of the reinforcing cage of the column (5) at the bottom of the embedment (4) in the lower part of the reinforcing casing of the column (6) is rigidly fixed in the non-removable formwork pipe (2) by welding to the inner retaining ring. The lower part of the reinforcing cage of the column (6) is assembled from working longitudinal and distribution annular or spiral rods and is rigidly connected by lap welded joints to an unremovable formwork pipe (2) in the sealing zone (4). The design of the drill string communication nodes with the floors of the underground floors and the foundation slab determines the tolerance for the height position of the column head after erection of ± 100 mm. An appropriate tolerance is also given for the depth of the borehole. Since the mentioned tolerance in the process of drilling a well is difficult to provide, it is envisaged to perform leveling filling with granular material (crushed stone or gravel of a fraction of 40-70 mm) to its bottom if the calculated well depth is exceeded by more than 100 mm and after cleaning the bottom of the well from 5 10 15 20 The amount of granular material needed for adding is determined by calculation after measuring the depth of the drilled well. Tamping of granular bedding material is done using standard mounted drilling equipment. Then a repeated measurement of the depth of the well is carried out and, if necessary, re-adding granular material to the bottom and tamping it. The whole reinforcing cage (2, 5, 6) is immersed in the well by a truck crane with the necessary characteristics for these purposes. A submerged reinforcing cage (2, 5, 6) rests on the bottom of a borehole, covered with tamped granular material. Then, an inventory centering conductor equipped with a system of horizontal and vertical hydraulic jacks is installed above the head of the upper part of the reinforcing cage (2.5) of the column. The support frame of the centering jig is temporarily fixed to the fore shaft. The centering of the whole reinforcing cage (2, 5, 6) is preceded by the lifting of the casing by the vertical hydraulic jacks of the conductor by an amount of Шс relative to the top of the leveling bed at the bottom of the well. In this case, the integral reinforcing cage (2, 5, 6) is torn off from the bottom of the well by the same amount and the cage freezes in the well, occupying a vertical position under the influence of its own gravity (plumb condition). Compensation of the eccentricity of the projection of the geometric axis and the projection of the axis of the center of mass is achieved by the design of the reinforcing cage (5.6). The centering of the reinforcing cage in the plan is performed by a system of horizontal hydraulic jacks. The final centering operation is to check the verticality of the solid reinforcement cage (2, 5, 6) using 7 5 10 15 20
Then verified in the plan and occupying the position of the plumb line, the frame of the column by means of the vertical hydraulic jacks of the conductor synchronously plunges to the bottom of the well. Monolithic casing is carried out continuously by the method of vertically moving inside a solid reinforcing cage (2, 5, 6) of a concrete pipe with parallel grouting (filling) with granular material (crushed stone or gravel of a fraction of 40-70 mm) of the gap between the non-removable formwork pipe (2) and the borehole walls . The grouting begins after completion of the mono-filling of the lower part of the reinforcing cage (6) and in parallel with the mono-filling of the upper part of the reinforcing cage (5). The upper part of the reinforcing cage (2, 5) is previously rigidly fixed on the fore shaft and the inventory centering conductor is removed. The device of the reinforced concrete drill string allows you to combine the operations of its manufacture and installation in the design position, to center its skeleton with compensation for the eccentricity of the projection of the geometric axis and the projection of the axis of the center of mass, and also ensures its accuracy with a deviation of the axis of the column from the vertical of not more than 1: 500 and ± 5 mm - in the plan. 4. The ability to implement a utility model. Combining in a single design the functions of the foundation element and the vertical load-bearing element of the building or structure and the method of erecting the column increase the accuracy of installation, as well as provide versatility and allow you to simultaneously (in parallel) and / or sequentially (in any sequence) perform work above and below the zero ground mark . 8 5 10 15 20 During the construction of the Tsarev Sad Garden Multifunctional Complex, as well as the five-level underground parking lot of the Moscow City Arbat Center in Moscow, the proposed reinforced concrete drilling columns were erected. The implementation of such a large-scale project as Tsarev Garden would not have been possible without the use of a new design. In order to emphasize the fundamental differences between the applied solution and drilling piles, the term drill string has been introduced. The ongoing project did not provide for any restrictions on the anticipatory construction of aboveground parts of buildings over underground. It was taken into account that the faster the aboveground floors grow, the greater the pit load and the lower the deformations of the surrounding soil mass and constructed structures. 225 drill strings 26.5 m long were erected from the surface of the construction site with high accuracy as permanent load-bearing structures that do not require any further reinforcement or refinement. The accuracy of the execution of the columns (deviation from the vertical no more than 1: 500) was achieved by using the intrinsic gravity of solid reinforcing cages with a diameter of 720/980 mm when they were centered in wells with a diameter of 1.2 m, drilled under the protection of a bentonite solution. Taking into account the design of the nodes of the interface between the drill strings and the floors of the underground floors and the foundation slab, the design established a tolerance for the deviation of the axis of the columns from the vertical of not more than 1: 500, and a tolerance for the height deviation of the heads of the columns of ± 100 mm. The upper part of each reinforcing cage consisted of a non-removable steel formwork pipe with a diameter of 720 mm. The lower part was assembled from reinforcing bars based on steel rings with a diameter of 920 mm. 9

Claims (5)

1. Reinforced concrete column containing monolithic concrete mixture of the core, including reinforcement and communication nodes, characterized in that the column is made with the possibility of installing it in the borehole, consists of an upper supporting and lower foundation parts, the core is made in the form of structures of the reinforcing casing of the column, placed in non-removable formwork with equivalent maximum outer diameter of the column Dк <Dс by α = (2εr + 2Δ + 2τ), where Dк - equivalent outer diameter of the column, Dс - diameter of the borehole, εr - projection eccentricity the geometric axis and the projection of the axis of the center of mass of the column in the plane of the suspension (top) of the column, Δ is the deviation of the axis of the borehole from the vertical, τ is the deviation of the axis of the borehole in the plan, communication nodes are located in the upper supporting part of the column at the level marks of floor slabs and foundation slabs in the form of embedded parts from closed loops with stiffeners.
2. The device according to claim 1, characterized in that the skeleton is made of steel, non-removable formwork is made of a pipe of round or square cross-section.
3. The device according to claim 1, characterized in that the non-removable formwork is placed in the upper supporting part of the column, the part of the reinforcing cage located in the lower foundation part of the column is connected by overlapping with the part of the reinforcing cage located in the upper supporting part with termination of the elements reinforcing cage.
4. The device according to claim 1, characterized in that the communication nodes located in the upper supporting part of the column at the level marks of floor slabs and the base plate are arranged by cutting into the drill string to embedded parts in the form of closed loops with stiffeners and with additional ribs rigidity and distribution plates for fixing the working reinforcement of the floors and the base plate.
5. The device according to claim 3, characterized in that the equivalent outer diameter of the portion of the reinforcing cage located in the lower foundation of the column is equal to or greater than the outer diameter of the non-removable formwork.
Figure 00000001
RU2003123296U 2003-07-31 2003-07-31 Reinforced concrete drill string RU34952U1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2577780C1 (en) * 2015-02-24 2016-03-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Петербургский государственный университет путей сообщения Императора Александра I" Method for construction of pile foundation
RU2643231C1 (en) * 2017-03-01 2018-01-31 Федеральное государственное бюджетное образовательное учреждение высшего образования Новосибирский государственный архитектурно-строительный университет (Сибстрин) Method of connecting auger pile with solid floor of underground structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2577780C1 (en) * 2015-02-24 2016-03-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Петербургский государственный университет путей сообщения Императора Александра I" Method for construction of pile foundation
RU2643231C1 (en) * 2017-03-01 2018-01-31 Федеральное государственное бюджетное образовательное учреждение высшего образования Новосибирский государственный архитектурно-строительный университет (Сибстрин) Method of connecting auger pile with solid floor of underground structure

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MM1K Utility model has become invalid (non-payment of fees)

Effective date: 20080801