Cross-shaped pipe pulling device for node pile

Abstract

The cross-shaped pipe pulling device comprises a hydraulic device and a pipe pulling frame, the hydraulic device is used for providing pulling force, the pipe pulling frame is provided with four through holes or opening grooves used for detachably and fixedly installing a mold, and the center connecting lines of every two opposite through holes or opening grooves are distributed in a cross shape. By means of the distributed cross-shaped mold layout, compared with an existing barrel-shaped steel mold, the self weight of a single mold and the bonding force between the single mold and initial set concrete are obviously reduced, the needed pulling force is obviously reduced, and a smaller hydraulic device can be adopted for pulling; the probability that the mold cannot be pulled out or even is damaged due to the fact that the adhesive force between the mold and the node pile initial set concrete is too large in the pulling-out process is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to geological treatment construction technical field especially relates to the anti -infiltration curtain wall geology construction, and particularly relates to the network format deep stratum anti -infiltration curtain wall construction technical field, and specifically relates to a cross pipe pulling device for node pile. BACKGROUND

[0002] The node pile is one of the most critical construction links in the anti -infiltration curtain wall construction, and is also the core component in the geological anti -infiltration curtain wall construction, refers to the vertical pile body formed by pouring concrete after forming regular hole in stratum through rotary drilling, impact hole forming etc., and its function includes reinforcing soft stratum, forming anti -infiltration barrier. In construction, steel casing is often used as temporary mold to fix hole wall and constrain concrete forming, and after demolding, it is connected with adjacent slot section concrete structure to bite, and forms continuous integrated anti -infiltration wall or supporting system, and has the dual functions of structure bearing and water interception anti -infiltration.

[0003] The existing node pile pouring can be divided into steel mold pouring and moldless pouring according to whether the mold is used, and the two adopt different construction ideas. Among them, the mode of steel mold pouring is to use the barrel-shaped structure of steel to protect the side wall of the hole, then batch pouring concrete into the mold, when the concrete in the lowermost layer is initial setting, the steel mold is pulled upward by the hydraulic mechanism on the ground until the lowermost end of the steel mold is near the uppermost end of the initial setting concrete in the lowermost layer, but cannot exceed the highest position of the initial setting concrete, otherwise, the concrete that has not formed initial setting state will leak, which may cause node pile loss, water gushing and other causes to produce structural defects after node pile solidification. The biggest advantage of this way is that it can adapt to any geological environment, and the worse the geological environment, the construction effect will not be affected; the disadvantage is that the structural strength of the steel mold is high, and the timing of pipe pulling is accurate, otherwise, the steel mold may be damaged, and even cannot be pulled out from the bottom. Once the problem occurs, the node pile structure has defects, which may cause leakage or gap; the steel mold is scrapped, and can only be permanently buried underground, which can also ensure the integrity of the anti -infiltration curtain wall structure.

[0004] The formworkless casting method uses mud slurry for wall protection, directly pouring concrete into the drilled hole in one go, which naturally forms the node pile structure after solidification. This method is the simplest to construct, fundamentally eliminating the formwork removal process, as well as the processes of formwork manufacturing, hoisting, and formwork removal, resulting in very high construction efficiency. However, because there are no formwork restrictions, this method has advantages for hard rock strata throughout the entire process. It can ensure the structural quality of the node piles and achieve the lowest cost construction, as construction can be completed without the need for formwork on site. However, since the actual construction strata are generally 100-200 meters deep, and the actual strata involved are often multiple complex strata interspersed, the node pile structures obtained by casting without formwork in complex strata environments are often unsatisfactory, or even completely unqualified. This is mainly reflected in the fact that the node pile structure cannot guarantee good integrity, the surface flatness of the node pile is poor, and a large amount of sand and gravel will be mixed in when subsequently pouring and joining the trench, making it difficult for the entire anti-seepage curtain wall to form a unified waterproof structure. Furthermore, irregular nodal pile surfaces in leaking strata can exhibit significant convex concrete structures, which greatly hinders subsequent cleaning and connection of the cutoff wall and causes substantial wear on equipment such as dual-wheel milling machines used for trenching. Therefore, formworkless casting is only suitable for specific construction scenarios, has a narrow application range, and lacks widespread applicability.

[0005] In view of the shortcomings of the existing technology, there is an urgent need for a node pile construction device that has good forming effect, facilitates the subsequent joint pouring of the anti-seepage wall, and has good construction feasibility. Utility Model Content

[0006] To address the problems of high damage and scrap rates of steel molds and difficulty in guaranteeing the quality of moldless casting of node piles in existing technologies, this application provides a cross-shaped tube extraction device for node piles. This device not only improves the structural and surface quality of the node pile after molding, based on existing steel mold casting construction, but also greatly reduces the difficulty of extraction, significantly increases the reusability and service life of the mold, and significantly reduces or even eliminates the extraction failure rate.

[0007] This utility model can achieve at least one of the following technical effects:

[0008] 1. By adopting a distributed cross-shaped mold layout, the self-weight of a single mold and the bonding force from the initial set concrete are significantly reduced compared to the existing barrel-shaped steel mold. The required lifting force is significantly reduced, and a smaller hydraulic device can be used for lifting. This greatly reduces the probability that the mold will be unable to be lifted or even damaged due to excessive adhesion between the mold and the initial set concrete of the node pile during the lifting process.

[0009] 2. The cross-shaped die layout can meet the construction requirements of cross nodes, T-shaped nodes and linear nodes; the steel reinforcement cage used for the node pile does not need to be welded with a steel plate for blocking the leakage of concrete, so that the subsequent anti-seepage concrete can be better combined with the node pile into an integrated structure, the butt joint caused by different materials is avoided, and the anti-seepage capacity of the anti-seepage curtain wall is reduced.

[0010] 3. The die cross section provided by the utility model adopts the design of concave trapezoidal cross section, which can be beneficial to the slot washing and the combination of the secondary pouring anti-seepage wall and the node pile to form an integrated anti-seepage wall structure, improve the anti-seepage efficiency of the anti-seepage wall, and avoid the formation of butt joints caused by the intermediate mixed metal material partition.

[0011] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is:

[0012] A cross-shaped pipe pulling device for a node pile, comprising a hydraulic device for providing pulling force and a pipe pulling frame, the pipe pulling frame has four through holes or open grooves for detachably and fixedly installing a die, and the center lines of the two through holes or open grooves are distributed in a cross shape.

[0013] In order to better adapt to the construction of anti-seepage walls with different layouts, preferably, the pipe pulling frame is arranged in a rectangular, circular or square shape, and the through holes or open grooves are arranged in a circumferential array around the center of the pipe pulling frame. The above structure is adopted, so that the upper, lower, left and right of the formed node pile will form a structure recessed into the node pile, forming a similar mortise and tenon structure with the main body of the secondary pouring curtain wall, which can effectively improve the connection ability between the node pile and the surrounding anti-seepage wall main body. Furthermore, the upper, lower, left and right have reserved connecting grooves for the anti-seepage wall, so that the node pile can meet the possible linear connection, T-shaped connection and cross-shaped connection, and has strong construction compatibility.

[0014] In order to facilitate the butt joint installation and disassembly of the mold, preferably, the mold comprises a mold body which is integrally formed and hollow, a mold joint which is detachably and fixedly connected at both ends of the mold body for connecting adjacent molds, a plurality of positioning holes are arranged on the mold body along the length direction, and a sleeve is fixedly connected between the positioning holes.

[0015] In order to further improve the combination degree between the node pile and the secondary pouring anti-seepage curtain wall, and avoid the reduction of the anti-seepage effect caused by the butt joint, preferably, the cross section of the mold is in a closed and symmetrical shape composed of a bottom edge, an inclined edge distributed on the bottom edge and outwardly deflected, and an arc-shaped edge connecting the inclined edges. The purpose of the above structure is to strengthen the structural combination degree between the node pile and the anti-seepage curtain wall body, form a mortise and tenon structure or a clamping structure, so that the entire stratum can form an integrated structure of mutual engagement and mutual adhesion between all node piles and the anti-seepage curtain wall body, has better structural strength and integrity, and can better provide anti-seepage and stress resistance, so that the treated stratum area has stronger resistance to geological disasters.

[0016] In order to balance the strength of the node pile itself and the adhesion strength and effective adhesion area between the node pile and the adjacent anti-seepage wall body, preferably, the length of the midpoint connecting line H of the bottom edge and the arc-shaped edge is %-% of the radius of the node pile.

[0017] In order to facilitate the pulling of the mold, preferably, the pulling frame comprises a plurality of parallelly arranged connecting columns, and an upper frame and a lower frame fixedly connected at both ends of any connecting column, respectively, a plurality of clamping mechanisms are arranged on the connecting columns and matched with a hydraulic device for providing pulling force.

[0018] In order to facilitate the fixing of the mold in the state of being under the mold and after being pulled out, preferably, four positioning and fixing structures for clamping the mold are arranged on the upper frame.

[0019] Beneficial effects:

[0020] 1. The distributed cross-shaped mold layout is adopted, the self-weight of a single mold and the adhesion force from the initial setting concrete are significantly reduced compared with the existing barrel-shaped steel mold, the pulling force required is obviously reduced, a smaller hydraulic device can be used for pulling, and the probability of the mold being unable to be pulled out or even being damaged due to the excessive adhesion force between the mold and the initial setting concrete of the node pile during the pulling process is greatly reduced.

[0021] 2. The cross-shaped mold layout provided by the utility model can meet the construction requirements of cross nodes, T-shaped nodes and linear nodes; the steel reinforcement cage used in the node pile does not need to be welded with a steel plate for blocking the leakage of concrete, so that the subsequent anti-seepage concrete can be better combined with the node pile to form an integrated structure, the butt joint caused by different materials is avoided, and the anti-seepage capacity of the anti-seepage curtain wall is reduced.

[0022] 3. The concave trapezoidal cross section of the mold can facilitate the slotting and hole washing, and can help the secondary pouring anti-seepage wall to be combined with the node pile to form an integrated anti-seepage wall structure, improve the anti-seepage efficiency of the anti-seepage wall, and avoid the formation of the butt joint caused by the intermediate mixed metal material. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram showing the usage state of this utility model.

[0025] Figure 2 yes Figure 1 The main view.

[0026] Figure 3 yes Figure 2 A sectional view with the section symbol AA along the center line.

[0027] Figure 4 The structural front view of this utility model.

[0028] Figure 5 yes Figure 4 A sectional view of the section symbol BB.

[0029] Figure 6 This is the structural isometric drawing of this utility model.

[0030] Figure 7 yes Figure 6 Enlarged view of the structure in the C region.

[0031] Figure 8 yes Figure 6 Another visual axonometric drawing.

[0032] Figure 9 This is a schematic diagram of the cross-sectional shape of the mold.

[0033] In the diagram: 1-stratum; 2-pipe puller; 21-upper frame; 22-lower frame; 23-connecting column; 24-positioning and fixing mechanism; 3-mold; 31-mold body; 32-mold joint; 33-positioning hole; 301-bottom edge; 302-sloping edge; 303-arc edge; 4-concrete; 5-reinforcing cage. Detailed Implementation

[0034] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0036] It should be noted that similar reference numerals and letters in the following drawings represent similar items, and therefore, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

[0037] In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second" and the like appear in the description of the present application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0038] In addition, if the terms "horizontal", "vertical" and the like appear in the description of the present application, they do not mean that the component must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0039] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] Embodiment 1:

[0041] Referring to the drawings Figures 1-5 As shown in the drawings, the embodiment provides a cross pipe pulling device for a node pile, which comprises a hydraulic device for providing pulling force and a pipe pulling frame 2, and the pipe pulling frame 2 is provided with four through holes or open grooves for detachably and fixedly mounting molds 3, and the center lines of the opposite two through holes or open grooves are distributed in the shape of a cross. The biggest difference between the embodiment and the prior art is that the existing steel barrel-shaped retaining wall mold is changed into a split mold 3 distributed in the shape of a cross, that is, four vertically and parallel arranged molds 3 are distributed in the shape of a diamond, and each mold 3 is located at a corner of the diamond. When the node pile is poured, the existing steel barrel-shaped retaining wall mold bears the pressure of the concrete poured in the steel barrel-shaped retaining wall mold, and the hole wall of the stratum 1 is not subjected to the pressure of the concrete, so no matter what stratum 1 is, it will not affect the quality of the node pile, which is the biggest advantage of the barrel-shaped retaining wall mold. However, because the structure is in full contact with the node pile, a very large pulling force is needed when demolding. Generally, a rotating force is applied to the barrel-shaped mold during demolding to loosen the node pile and the barrel-shaped retaining wall mold in advance, so that the subsequent pulling is easier. However, in the actual construction process, the depth of single pouring is often too large, or the demolding is difficult due to the delay of the expected initial setting time, and even the mold is scrapped and cannot be pulled out. In view of the existing defects, the embodiment compared with the prior art adopts a dispersed arrangement to effectively solve the problem that the adhesion area of the concrete is too large and the adhesion force is not enough to break and cause the problem of being unable to pull out. The beneficial effects of such an arrangement are that:

[0042] Firstly, the bonding surface between the single mold 3 and the poured concrete is significantly reduced, requiring less pulling force during demolding and pipe pulling, thus reducing the possibility of damaging the mold 3. The hydraulic device for demolding is also smaller, resulting in lower overall costs and better economic efficiency. Secondly, the weight of a single mold 3 of the same length is significantly reduced compared to existing steel sleeve molds, greatly reducing the probability of mold damage leading to extraction failure during pulling. Thirdly, since the mold 3 is installed at the top, bottom, left, and right positions of the pipe pulling frame 2, bonding positions for connecting to the seepage barrier wall are reserved in all four directions, enabling "+", "T", and "I" shaped joint pouring, meeting the pouring requirements of various seepage barrier wall structures. Fourthly, this invention is also an innovative improvement over existing node piles with multi-groove structures. Existing node piles have steel plates welded to the joint between the reinforcing cage and the seepage barrier wall to prevent concrete from seeping into the node pile hole when retarding soil is poured into the reinforcing cage, thus failing to achieve high surface quality of the node pile. Existing reinforcing cages prevent concrete seepage by welding steel plates to the surface at the joint with the cutoff wall, making the steel plate the corresponding surface after solidification. While this structure ensures the structural quality of the node piles, it also introduces another drawback: the steel plate surface is prone to forming joints with the cutoff wall concrete. Because the steel plate surface is relatively smooth and flat, when the stratum is under pressure and the cutoff wall is subjected to horizontal forces, the bond between the steel plate and the cutoff wall is the thinnest part of the entire cutoff wall, making it extremely easy for joints to form. This results in the entire cutoff wall no longer being a unified structure, creating leakage points. The mold 3 in this embodiment can act as a barrier for the steel plate. See [link to relevant documentation]. Figure 5 As shown, the reinforcing cage 5 only needs to provide skeleton support. The mold 3 can prevent concrete from entering the mold body 31. After the concrete of the node pile is poured solidifies, the entire area where the reinforcing cage 5 is located forms an integrated concrete structure. After demolding, the place where the mold 3 was originally installed is hollow. When the anti-seepage wall is poured, after the anti-seepage wall trench is excavated, the original position of the node pile where the mold 3 was installed is concave and relatively smooth, which is very easy to clean. It can bond with the concrete of the anti-seepage wall to form an integrated structure. In addition, the concave structure on the node pile side can form a snap or mortise and tenon structure with the anti-seepage wall concrete. Even if the anti-seepage wall is subjected to horizontal geological stress, it will not undergo relative displacement. It will not cause the problems described above, such as the inconsistency between the steel plate and the anti-seepage wall material, and the easy formation of joints due to the flat plane, which leads to the formation of new leakage points.

[0043] Example 2:

[0044] To better adapt to the construction of seepage-proof walls with different layouts, this embodiment further incorporates the above-described embodiment 1 with reference to the appendix to the instruction manual. Figures 1-8The utility model discloses structure optimization improvement, specifically includes: the pull tube frame 2 is rectangular, round or square setting, the through -hole or the open slot is with the center of pull tube frame 2 Perimeter array distribution.Using the structure setting described above, make in the node stake of forming, left, right all can form the structure recessed to the node stake interior, with the similar mortise and tenon structure of secondary pouring curtain wall main part, can effectively improve the cohesion ability between node stake and surrounding anti -infiltration wall main body.Further, there is the slot of reserving the connection anti -infiltration wall in up and down left and right, like this make node stake can satisfy possible a character connection, T type connection and cross connection, have very strong construction compatibility.

[0045] In order to facilitate the butt joint installation and the disassembly of the pulling in the mold 3 below, in the embodiment, the mold 3 includes a mold body 31 which is integrally formed and hollowly arranged, a mold joint 32 which is detachably fixedly connected at both ends of the mold 3 and used for connecting adjacent molds 3, a plurality of positioning holes 33 are arranged on the mold body 31 along the length direction, and a sleeve pipe is fixedly connected between the sidewalls of any one positioning hole 33. The mold joint 32 is used for connecting two adjacent mold bodies 31, and one mold body 31 is connected below one mold body 31, so that the hoisting weight can be greatly reduced; conversely, after the mold is pulled out, one is pulled out and one is disassembled, that is, the part of the mold body 31 which is out of the pull tube frame 2 can be disassembled, so that the construction of node stakes with different depths can be met, and the length of the single mold body 31 and the total length of the mold 3 required by the construction stratum are not limited.

[0046] In order to further improve the combination degree between the node stake and the secondary pouring anti -infiltration curtain wall, and avoid that the anti -infiltration effect is reduced due to the butt joint; in the embodiment, the cross section of the mold 3 is composed of a bottom edge 301, an inclined edge 302 which is distributed on the bottom edge 301 and is outwardly deflected, and an arc edge 303 which connects the inclined edge 302, and is a closed and symmetrical shape. The purpose of the above structure is to strengthen the structural combination degree between the node stake and the anti -infiltration curtain wall body, form a mortise and tenon structure or a clamping structure, so that all the node stakes arranged in the whole stratum and the anti -infiltration curtain wall body can form an integrated structure of mutual buckling and mutual adhesion, have better structural strength and integrity, can better provide anti -infiltration and stress resistance, and make the treated stratum area have stronger anti -geological disaster ability.

[0047] In order to balance the strength of the node pile itself and the bonding strength and effective bonding area of the node pile and the adjacent main body of the anti-seepage wall, in the embodiment, the length of the midpoint connecting line H of the bottom edge 301 and the arc-shaped edge 303 is 20%-35% of the radius of the node pile. Among them, the larger the radius of the node pile is, the smaller the ratio of the midpoint connecting line H can be, and vice versa. The purpose of setting is to meet the reliability of the node pile and the anti-seepage wall clamping, and also to ensure the reliability of the structural strength of the node pile itself.

[0048] In order to pull out the mold, preferably, the pull-out frame 2 comprises a plurality of parallel connection columns 23, and an upper frame 21 and a lower frame 22 fixedly connected at both ends of any connection column 23, respectively. A plurality of clamping mechanisms for matching with a hydraulic device for providing pulling force are arranged on the connection column 23. The hydraulic device adopts the prior art, which functions to apply an upward force to the pull-out frame 2 to pull up the mold 3 clamped or fixedly connected with the pull-out frame 2.

[0049] In order to facilitate the fixation of the mold under the state and after pulling out, in the embodiment, the upper frame 21 is provided with four positioning and fixing structures 24 for clamping the mold 3, respectively. The fixing structure 24 adopts a shaft pin type insertion fixation, which clamps the mold 3 on the pull-out frame 2 by means of a shaft pin, so as to fix the relative position of the mold 3 and the pull-out frame 2, and also facilitate disassembly.

[0050] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cross-shaped pipe-pulling device for node piles, comprising a hydraulic device for providing pulling force and a pipe-pulling frame (2), characterized in that: The tube puller (2) has four through holes or opening slots for detachable and fixed installation of the mold (3), and the center lines of two of the through holes or opening slots are arranged in a cross shape.

2. The cross-shaped pipe-pulling device for node piles according to claim 1, characterized in that: The tube puller (2) is rectangular, circular or square, and the through holes or opening slots are arranged in a circular array around the center of the tube puller (2).

3. A cross-shaped pipe-pulling device for node piles according to claim 1 or 2, characterized in that: The mold (3) includes an integrally formed and hollow mold body (31) and a mold connector (32) detachably and fixedly connected to both ends of the mold (3) for connecting adjacent molds (3). The mold body (31) has multiple positioning holes (33) along its length, and a sleeve is fixedly connected between the two side walls of any positioning hole (33).

4. A cross-shaped pipe-pulling device for node piles according to claim 3, characterized in that: The cross-section of the mold (3) is a closed and symmetrical shape consisting of a bottom edge (301), a hypotenuse (302) distributed on the bottom edge (301) and deflected outward, and an arc-shaped edge (303) connecting the hypotenuse (302).

5. A cross-shaped pipe-pulling device for node piles according to claim 4, characterized in that: The length of the line H connecting the midpoints of the bottom edge (301) and the arc edge (303) is 20%-35% of the radius of the node pile.

6. A cross-shaped pipe-pulling device for node piles according to any one of claims 1-2 and 4-5, characterized in that: The tube pulling frame (2) includes multiple parallel connecting columns (23), and an upper frame (21) and a lower frame (22) respectively fixedly connected to both ends of any of the connecting columns (23). The connecting columns (23) are provided with multiple locking mechanisms for matching with the hydraulic device used to provide pulling force.

7. A cross-shaped pipe-pulling device for node piles according to claim 6, characterized in that: The upper frame (21) is provided with four positioning and fixing structures (24) for respectively engaging the mold (3).

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