Concrete support structure for cast-in-place slab, haunching and method and matching mold thereof

Abstract

The application discloses a concrete support support structure for cast-in-place slabs and haunches, comprising a concrete support and a support system; the concrete support comprises a support body structure and a vertical rod butt joint structure at the upper end of the support body; the support body structure is formed by pouring concrete, the surface of the support body structure is rough, and the height of the support body structure is equal to the thickness of the cast-in-place slab; the support system comprises vertical rods, sweeping rods, horizontal rods, top supports, horizontal rods, support blocks and formworks; the lower end of each vertical rod is inserted into the vertical rod butt joint structure of the concrete support, the bottom of each vertical rod is fixedly connected with a sweeping rod, and a T-shaped top support is arranged at the upper portion of each vertical rod; the upper end surface of each horizontal rod is provided with a plurality of support blocks; the application further discloses a corresponding mold and a construction method, reduces the risk of water leakage, solves the stability and safety of the support system when a plurality of concrete components are poured at the same time, increases the construction efficiency, and reduces the construction cost.

Description

[0001] Concrete support structure for cast-in-place slab and haunch and its matching mold and method TECHNICAL FIELD

[0002] The present application belongs to the field of building construction, and particularly relates to a concrete support for cast-in-place slab and haunch and its matching mold and method. BACKGROUND

[0003] In building engineering, a common high-rise residential project generally includes a garage and a main building, and the garage roof often needs to be backfilled to bury the comprehensive pipe network and green planting, so the structural elevation of the first floor of the main building is higher than that of the garage roof. A retaining wall is designed at the height difference to reduce the risk of water leakage. Garage roof, retaining wall, and external additional cantilever components (balconies, balconies, air conditioning plates, etc.) are required to be cast in one time by the specification and design personnel to avoid construction joints and potential water leakage after backfilling.

[0004] In some building engineering, due to the particularity of the design, the lower cast-in-place slab, the upper cantilever cast-in-place slab, and the reinforced concrete wall between them are required to be cast at the same time, and cannot be cast in multiple times to avoid construction joints.

[0005] According to field investigation, in order to achieve the purpose of simultaneous casting of multiple components, the most commonly used construction method in the field at present is to install a "earth" shaped steel reinforcement frame on the lower cast-in-place slab that has been bound, insert a steel pipe into the steel reinforcement frame, and thus form a steel pipe support system. However, this method has the following defects: 1. Since the "earth" shaped steel reinforcement frame directly contacts the formwork surface, after the concrete is poured and the formwork is removed, the reinforcement may be leaked and rusted, resulting in poor visual quality; 2. Since the "earth" shaped steel reinforcement frame is very simple in structure, it is only composed of three steel bars welded together, and the stress is unstable, which is easy to twist or fall, thus cannot guarantee the safety of the upper support system; 4. After the formwork support system is removed, the exposed steel reinforcement heads on the upper surface of the lower cast-in-place slab need to be cut off again, which consumes a lot of labor; 5. After the pouring of the above-mentioned concrete components is completed and before the strength reaches the fully shaped strength, the disturbance of the external construction load to the steel pipe support system will cause gaps between the "earth" shaped steel reinforcement and the poured concrete, which is easy to seep along the gaps.

[0006] According to field investigation, another construction method is to directly insert the steel pipe of the support system into the lower cast-in-place slab that has been bound, and the steel pipe contacts the bottom formwork of the lower cast-in-place slab. Since the cross-sectional area of the steel pipe is small, the weight of the upper component and the self-weight will cause damage to the bottom formwork of the lower cast-in-place slab, and the steel pipe cannot be poured with concrete, which seriously violates the "Concrete Engineering Quality Acceptance Specification" and "Uniform Standard for Safety Technology of Construction Scaffolding".

[0007] Some prior art concrete pads solve the need for steel binding to some extent, but face problems such as lack of versatility, inability to serve as support system supports, difficulty in installation, design limitations due to steel spacing, poor results in combination with newly poured concrete, and insufficient strength of fixing elements. In actual construction, there are defects such as low efficiency, high cost, poor stability, and potential leakage risks, which limit their potential in more widespread applications. SUMMARY

[0008] In view of the defects in the prior art, such as construction safety and quality risks, the present application provides a concrete support, a concrete support matching mold, and a construction method for the support and the mold, which can quickly complete the overall pouring of the lower cast-in-place slab, the upper cast-in-place slab, the middle reinforced concrete, and the haunch component while ensuring quality and safety.

[0009] To solve the above problems, the technical scheme adopted by the present application is as follows: a concrete support structure for cast-in-place slabs and haunches, comprising a concrete support and a support system fixedly arranged on the concrete support;

[0010] The concrete support comprises a support body structure and a vertical rod butt joint structure located at the upper end of the support body; the support body structure is made of concrete pouring, has a rough surface, and has a height equal to the thickness of the cast-in-place slab (2); the upper surface of the concrete body has the same strength grade as the concrete strength grade of the cast-in-place slab (2).

[0011] The support system comprises vertical rods, a sweeping rod, a second horizontal rod, a top support, a first horizontal rod, support blocks, and a formwork; the vertical rods are multiple, each vertical rod has a lower end inserted into the vertical rod butt joint structure of the concrete support, each vertical rod has a bottom fixedly connected with the sweeping rod, and each vertical rod has a T-shaped top support at the upper part, the T-shaped top support is connected with the second horizontal rod and serves as a lifting for the second horizontal rod; the upper end surface of the horizontal rod is provided with multiple support blocks, such as block structures made of wood, and the formwork is arranged at the upper end of the multiple support blocks.

[0012] Further, the support body structure is in the shape of a cylinder, a circular table, or a cuboid.

[0013] Further, the vertical rod butt joint structure is a tubular circular groove arranged on the upper end surface of the support body structure and recessed downward, and the tubular circular groove is embedded with the lower part of the vertical rod.

[0014] Further, it further comprises a leg structure located at the lower end of the support body, the leg structure is a plurality of second support legs arranged circumferentially and uniformly on the lower end surface of the support body structure, and the plurality of second support legs form a gap for the steel to pass through; the vertical rod butt joint structure is a tubular circular groove arranged on the upper end surface of the support body structure and recessed downward, and the tubular circular groove is embedded with the lower part of the vertical rod.

[0015] Further, it also includes a support leg structure at the lower end of the support body, the support leg structure is a plurality of No. 3 support legs arranged uniformly around the lower end surface of the support body structure, and a gap for the steel bar to pass through is formed between the plurality of No. 3 support legs; the stand rod butt joint structure is a hollow cube or cuboid arranged on the upper end surface of the support body structure and protruding upward.

[0016] Further, it also includes a haunch support system arranged at the internal corner;

[0017] The haunch support system is composed of a formwork, a support block, a No. 2 horizontal rod, a jacking support, a stand rod, a steel pipe tray, a tray sleeve, and a connecting rod. The support system composed of the above components falls as a whole on the No. 1 concrete support.

[0018] A connecting rod is inserted into the center position of the upper surface of the No. 1 concrete support, and the insertion depth is at least 5 cm. The total height of the connecting rod is the insertion depth plus the exposed height. Before the haunch reinforcement is tied and the haunch formwork is installed, the concrete support with the connecting rod is installed at the lower part of the haunch component, then the haunch formwork is installed, and a hole is opened at the corresponding position of the haunch formwork at the exposed part of the connecting rod. The stand rod is seated on the steel pipe tray, and the steel pipe tray is attached with a tray sleeve at the lower part. The tray sleeve is a hollow cylinder and is sleeved on the connecting rod. Further, it includes a No. 1 mold barrel body with a hollow shell structure and open at both ends, a ring of No. 1 mold barrel ears protruding outward at the lower edge of the No. 1 mold barrel body, and a No. 1 mold bottom plate detachably connected with the No. 1 mold barrel ears. The No. 1 mold bottom plate can cover and close the open end of the No. 1 mold barrel body.

[0019] Further, it includes a No. 2 mold barrel body with a hollow shell structure and open at both ends, a ring of No. 2 mold barrel ears protruding outward at the lower edge of the No. 2 mold barrel body, and a No. 2 mold bottom plate detachably connected with the No. 2 mold barrel ears. The No. 2 mold bottom plate can cover and close the open end of the No. 2 mold barrel body. The lower part of the No. 2 mold bottom plate is attached with a plurality of No. 2 mold legs with a hollow shell structure and open at the upper end. To allow the lower layer of reinforcement to pass through smoothly, the No. 2 mold legs are symmetrically arranged along the periphery of the No. 2 mold bottom plate, and a gap is formed between each leg. The gap can satisfy the requirement of the steel bar passing through. A plurality of holes are opened on the No. 2 mold bottom plate. The shape of the holes matches the shape of the upper end opening of the No. 2 mold leg and can embed the upper end of the No. 2 mold leg.

[0020] Further, the third mold barrel body includes a hollow shell structure and is open at the lower end, a ring of third mold barrel ears protruding outward from the lower edge of the mold barrel body, and a third mold bottom plate detachably connected with the third mold barrel ears, the third mold bottom plate covering and closing the open lower end of the third mold barrel body; the lower part of the third mold bottom plate is attached with a plurality of hollow shell structure third mold legs open at the upper end, the third mold legs are symmetrically arranged along the periphery of the second mold bottom plate to allow the lower layer of steel bars to pass through, and gaps are formed between the third mold legs to allow the steel bars to pass through; a plurality of holes are formed in the third mold bottom plate, the holes are shaped to match the shape of the upper end openings of the third mold legs and can embed the upper ends of the third mold legs; and the top surface of the third mold barrel body is upwardly convex to form a hollow square vertical rod butt joint structure open at the upper end.

[0021] As another aspect of the present application, it also relates to a construction method of a concrete support bearing structure, characterized in that it comprises the following steps:

[0022] Step 1: mold assembly: according to different mold conditions, all mold components such as mold barrel body, mold barrel ear, mold bottom plate, etc. are fixed by bolt connection.

[0023] Step 2: pouring concrete: pour the same strength grade concrete as the cast-in-place slab into the mold, compact the poured concrete by vibrating, and use a pressure groove steel pipe to press a circular groove on the surface of the poured concrete, and when there are haunch components, insert the connecting rods.

[0024] Step 3: mold removal: after the concrete reaches a certain strength, remove the bolts and remove all molds to obtain the formed concrete support bearing.

[0025] Step 4: support installation: according to the spacing and distribution of the upper layer of steel bars and the lower layer of steel bars on the slab or when there are haunch components, install the formed support bearing in the cast-in-place slab.

[0026] Step 5: installation of support system: install and place the support system composed of formwork, support block, horizontal rod, top support, horizontal rod, vertical rod, and sweeping rod below the upper structure slab on the support bearing; when there are haunch components, a small electric drill is used to drill holes at the intersection where the connecting rods pass through the haunch formwork, then a steel pipe tray with a tray sleeve is installed, and finally the other support system components described in this step are installed.

[0027] Step 6: overall pouring: after the concealed engineering is accepted, the cast-in-place slab, retaining wall, upper structure slab, and haunch component are poured and vibrated to compact the overall concrete.

[0028] Step 7: removal and turnover of support system: after the concrete strength grade reaches 100% of the design strength grade, the support system is removed and turned over for use with the precast concrete support bearing in other similar parts.

[0029] The beneficial effects and features of the present application are:

[0030] (1) The concrete support for cast-in-place slab and haunch of the present application solves the stability and safety of the support system when multiple concrete components are cast simultaneously through the prefabricated concrete support and the matching mold, ensuring construction safety.

[0031] (2) The concrete support for cast-in-place slab and haunch of the present application can effectively combine with the later cast concrete by using an inner surface embossed steel plate, the outer surface of the prefabricated concrete support is rough, which solves the problem of construction joints, reduces the risk of water leakage, and ensures the construction quality.

[0032] (3) The concrete support for cast-in-place slab and haunch of the present application can directly and stably place the upper steel pipe on the support by grooving the upper surface of the concrete support, which facilitates installation and removal, simplifies the construction process, and reduces construction costs.

[0033] (4) The concrete support for cast-in-place slab and haunch of the present application has a flat and smooth bottom surface, which is consistent with the appearance of the later cast concrete, ensuring the appearance quality after casting.

[0034] (5) The concrete support for cast-in-place slab and haunch of the present application can be reused after being used or removed once, which not only reduces construction costs but also increases construction efficiency, effectively ensuring construction progress. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 For the preferred embodiment of the present application, the upper and lower layer steel bars on the slab are located on the same vertical line.

[0036] Figure 2 For the preferred embodiment of the present application, the bottom elevation view of the No. 1 concrete support matching mold.

[0037] Figure 3 For the preferred embodiment of the present application, the grooved steel pipe elevation view of the No. 1 concrete support matching mold.

[0038] Figure 4 For the preferred embodiment of the present application, the No. 1 concrete support forming elevation view.

[0039] Figure 5 For the preferred embodiment of the present application, the No. 1 concrete support and slab bar position view.

[0040] Figure 6 For the preferred embodiment of the present application, the No. 2 concrete support and slab bar position elevation view.

[0041] Figure 7Figure 2 is a top view of the mold for the second concrete support of the preferred embodiment of the present application;

[0042] Figure 8 Figure 3 is a front view of the mold for the second concrete support of the preferred embodiment of the present application;

[0043] Figure 9 Figure 4 is a bottom front view of the mold for the second concrete support of the preferred embodiment of the present application;

[0044] Figure 10 Figure 5 is a side view of the second concrete support of the preferred embodiment of the present application;

[0045] Figure 11 Figure 6 is a bottom side view of the second concrete support of the preferred embodiment of the present application;

[0046] Figure 12 Figure 7 is a diagram of the position of the steel bars and the second concrete support of the preferred embodiment of the present application;

[0047] Figure 13 Figure 8 is a front view of the second concrete support with the upper steel bars of the preferred embodiment of the present application;

[0048] Figure 14 Figure 9 is a top view of the mold for the third concrete support of the preferred embodiment of the present application;

[0049] Figure 15 Figure 10 is a front view of the mold for the third concrete support of the preferred embodiment of the present application;

[0050] Figure 16 Figure 11 is a bottom front view of the mold for the third concrete support of the preferred embodiment of the present application;

[0051] Figure 17 Figure 12 is a side view of the third concrete support of the preferred embodiment of the present application;

[0052] Figure 18 Figure 13 is a bottom side view of the third concrete support of the preferred embodiment of the present application;

[0053] Figure 19 Figure 14 is a diagram of the position of the steel bars and the third concrete support of the preferred embodiment of the present application;

[0054] Figure 20 Figure 15 is a front view of the third concrete support with the upper steel bars of the preferred embodiment of the present application;

[0055] Figure 21 Figure 16 is a front view of the tray and sleeve of the preferred embodiment of the present application;

[0056] Figure 22 Figure 17 is a front view of the assembled components of the preferred embodiment of the present application;

[0057] Figure 23Fig. 1 is a perspective view of a concrete support according to a preferred embodiment of the present application;

[0058] Wherein, 1: a first concrete support, 1-1: a tubular round groove, 1-2: a first mold barrel body, 1-3: a first mold barrel ear, 1-4: a first mold bottom plate, 1-5: a first bolt, 1-6: a pressed groove steel pipe, 2: a cast-in-place slab, 2-1: a lower slab bar, 2-2: an upper slab bar, 2-3: a retaining wall, 2-4: a formwork, 3: a vertical rod, 3-1: a sweeping rod, 3-2: a T-shaped top support, 3-3: a first horizontal rod, 4: a second horizontal rod, 4-1: a support block (for example, a square wood is used), 4-3: an upper structure slab, 6: a second concrete support, 6-1: a second mold barrel body, 6-2: a second mold barrel ear, 6-3: a second mold bottom plate ear, 6-4: a second bolt, 6-5: a second mold bottom plate, 6-6: a second mold support leg, 6-7: a second support support leg, 7: a third concrete support, 7-1: a third mold barrel top, 7-2: a third mold barrel body, 7-3: a third mold barrel ear, 7-4: a third bolt, 7-5: a third mold bottom plate, 7-6: a third mold bottom plate ear, 7-7: a third mold support leg, 7-8: a top seat, 7-9: a third support support leg, 8: a concrete support, 8-1: a steel pipe tray, 8-2: a tray sleeve, 8-3: a connecting rod, 9: a haunched member, 9-1: a haunched bar, 9-2: a haunched formwork, 10: a concrete pouring surface. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0060] Embodiment 1 (when the upper bar and the lower bar of the slab are located on the same vertical line)

[0061] Please refer to Figure 1 Because the cast-in-place slab 2 and the upper structure slab 4-3 need to be backfilled with planting soil and the like within the height range thereof, the cast-in-place slab 2, the retaining wall 2-3 and the upper structure slab 4-3 need to be poured at the same time to avoid construction joints at the joint of the new and old concrete caused by pouring in multiple times, and the construction joints have the risk of water leakage.

[0062] Figure 1In the example, the upper reinforcement 2-2 and the lower reinforcement 2-1 of the cast-in-place slab 2 are both bidirectionally arranged, and the upper reinforcement and the lower reinforcement are located on the same vertical line. The vertical pole 3, the sweeping pole 3-1, the No. 1 horizontal pole 3-3, the top support 3-2, the No. 2 horizontal pole 4, the support block 4-1, and the formwork 2-4 are the support system of the upper structure slab 4-3. The No. 1 concrete support 1 is the lower support of the support system. Before the construction of the upper structure slab 4-3, the matching mold is used to prefabricate the concrete support 1, and then the support system of the upper structure slab 4-3 is erected. The specific method is:

[0063] First, the material used for the No. 1 mold barrel 1-2 is preferably embossed steel plate, the inner wall of which has a pattern of protruding surface, so that the surface of the formed concrete support 1 is rough, so that it can be fully combined with the concrete of the cast-in-place slab 2 poured for the second time without producing construction joints; the vertical height of the No. 1 mold barrel 1-2 is equivalent to the thickness of the cast-in-place slab 2.

[0064] Then, fix the No. 1 mold bucket ear 1-3 attached to the bottom of the No. 1 mold barrel 1-2 to the No. 1 mold bottom plate 1-4 through bolts 1-5, and then pour concrete with the same strength grade as the cast-in-place plate 2 into the No. 1 mold barrel 1-2; before the concrete is finally set and still has plasticity, use Figure 3 The grooved steel pipe 1-6 shown is pressed into a circular groove on the upper surface of the No. 1 concrete support 1. The wall thickness of the grooved steel pipe 1-6 is slightly larger than the vertical rod 3. Similarly, the width of the circular groove formed by it is also slightly larger than the wall thickness of the vertical rod 3, so that it can be smoothly inserted even when the vertical rod 3 is slightly deformed. The circular groove is pressed into a depth of about 5mm, and the pressed position is basically concentric with the upper surface of the No. 1 concrete support 1. After the concrete reaches a certain strength level, the No. 1 bolt 1-5 is removed to separate the No. 1 mold barrel ear 1-3 and the No. 1 mold bottom plate 1-4, and then the No. 1 concrete support 1 is taken out. The effect after molding is shown in FIG. Figure 4 As shown, it is then installed in the cast-in-place slab 2. The positional relationship between the No. 1 concrete support 1 and the upper reinforcement 2-2 and lower reinforcement 2-1 of the slab is shown in FIG. Figure 5 As shown, the longitudinal and transverse spacing of the No. 1 concrete support 1 is installed at the same as the design spacing of the vertical pole 3.

[0065] Secondly, insert all the vertical poles 3 into the circular groove 1-1 on the upper surface of the No. 1 concrete support 1, and then install the support system consisting of the sweeping pole 3-1, No. 1 horizontal pole 3-3, top support 3-2, No. 2 horizontal pole 4, support block 4-1, and formwork 2-4 in sequence according to the support system design requirements. The support system is now completed.

[0066] Again, tie the steel bars of the upper structure plate 4-3, and after the acceptance of the hidden project is completed, pour the concrete of the cast-in-place plate 2, retaining wall 2-3, and upper structure plate 4-3 and vibrate them to make them dense. The concrete pouring surface 10 formed after the pouring of the cast-in-place plate 2 is flush with the upper surface of the No. 1 concrete support 1.

[0067] Finally, according to the specification requirements, when the upper structure plate 4-3 concrete strength grade reaches the design strength grade 100%, the support system composed of the second horizontal rod 4, the top support 3-2, the first horizontal rod 3-3, the sweeping rod 3-1, the support block 4-1, the formwork 2-4 and the vertical rod 3 is removed. The depth of the circular groove 1-1 formed on the upper surface of the first concrete support 1 after removal is 5mm, which meets the flatness requirement of the concrete surface in the Concrete Structure Engineering Construction Quality Acceptance Specification, so it can be treated without treatment. The components of the removed support system can be recycled and reused for the prefabrication of the first concrete support 1.

[0068] Example 2 (when the upper layer of the plate and the lower layer of the plate are not located on the same vertical line)

[0069] Please refer to Figure 6 , which is different from example 1, due to the influence of the construction process, when the upper layer of the plate and the lower layer of the plate are not located on the same vertical line, the concrete support and its matching mold are changed, specifically:

[0070] The matching mold is shown in detail in Figure 7 , Figure 8 , Figure 9 , the second mold barrel ear 6-2 attached to the lower part of the second mold barrel 6-1 is connected and fixed with the second mold bottom plate ear 6-3 attached to the periphery of the second mold bottom plate 6-5 through the second bolt 6-4, and the lower part of the second mold bottom plate 6-5 is attached with four second mold legs 6-6. In order to make the lower layer of the plate pass through smoothly, the second mold legs 6-6 are symmetrically arranged along the periphery of the second mold bottom plate 6-5, and a "cross" gap is formed between each leg, which can meet the requirement of passing through the steel bar.

[0071] After the matching mold is removed, the formed second concrete support 6 is installed in the cast-in-place plate 2 as shown in Figure 10 , Figure 11 , the position relationship between the second concrete support 6 and the upper layer of the plate and the lower layer of the plate is shown in Figure 12 , and the other construction methods are similar to example 1.

[0072] Example 3 (upper layer of reinforcement densification):

[0073] Please refer to Figure 13 , which is different from example 1 and example 2, due to the consideration of the designer for stress and other factors, the upper layer of reinforcement 2-2 of the cast-in-place plate 2 is densified, and the longitudinal and transverse double-direction interval is smaller than that of the lower layer of reinforcement 2-1. In order to make the upper layer of reinforcement 2-2 pass through smoothly after densification, the concrete support and its matching mold are changed, specifically:

[0074] The matching mold is shown in detail in Figure 14 ,Figure 15 、 Figure 16 As shown in FIG. 7, the top of the third mold bucket 7-1 is a hollow cube, which is connected with the third mold bucket body 7-2. After pouring concrete into the third mold bucket top 7-1 and the third mold bucket body 7-2, the components of the mold are removed, and the shaped concrete support is as shown in FIG. 8. Figure 17 、 18 As shown in FIG. 9, after being installed in the cast-in-place slab 2, the position relationship between the third concrete support 7 and the upper layer of the slab 2-2 and the lower layer of the slab 2-1 is as shown in FIG. 10. Figure 19 As shown in FIG. 11, other construction methods are similar to those in Example 1 and Example 2.

[0075] Example 4 (the case of adding a haunch to the reinforced concrete component of the wall and the slab)

[0076] Please refer to FIG. 12. Figure 20 Different from Example 1, Example 2 and Example 3, in order to increase the shear resistance of the retaining wall 2-3 and the cast-in-place slab 2, the designer usually adds a haunch component 9 at the reentrant angle formed by the two, which requires being poured at the same time as the cast-in-place slab 2, the retaining wall 2-3 and the upper structure slab 4-3. In order to successfully install the support system at the haunch, the relevant components are changed, which are as follows.

[0077] The support system at the haunch is composed of the formwork 2-4, the support block 4-1, the second horizontal rod 4, the top support 3-2, the vertical rod 3, the steel pipe tray 8-1, the tray sleeve 8-2 and the connecting rod 8-3. The support system composed of the above components falls on the concrete support 1 as a whole.

[0078] According to the method of combining the mold described in Example 1, the combination is completed and is vibrated and compacted after being filled with concrete. The connecting rod 8-3 is inserted at the center position of the upper surface of the concrete support 1. In order to ensure stability, the insertion depth is at least 5 cm. The total height of the connecting rod 8-3 is the insertion depth plus the exposed height. The exposed height can be calculated according to the design drawing or measured on site. After the concrete reaches a certain condition, the mold is removed.

[0079] After the haunch reinforcement 9-1 is bound and before the haunch formwork 9-2 is installed, the concrete support 1 with the connecting rod 8-3 is installed at the lower part of the haunch component 9, and then the haunch formwork 9-2 is installed. A small electric drill is used to drill holes at the corresponding positions of the haunch formwork 9-2 at the exposed part of the connecting rod 8-3.

[0080] Please refer to FIG. 13. Figure 20 、 Figure 21 、 Figure 22, the steel pipe tray 8-1 is attached with a tray sleeve 8-2, the tray sleeve 8-2 is a hollow cylinder, and the tray sleeve 8-2 is sleeved on the connecting rod 8-3. Thus, the lower components of the upper structure plate 4-3 support system are combined, and other accessories of the support system are installed according to the above method.

[0081] The position relationship of the lower components of the support system after being combined and formed with the haunch 9-1, the upper layer of the plate 2-2 and the lower layer of the plate 2-1 is shown in Figure 23 The construction method of the support at the non-haunch position is selected according to the spacing distribution of the upper layer of the plate 2-2 and the lower layer of the plate 2-1 in the embodiments 1, 2 and 3.

[0082] After the strength grade of the concrete reaches 100% of the design strength grade, the above-mentioned support system components and the steel pipe tray 8-1 with the tray 8-2 are removed, and then the connecting rod 8-3 exposed on the surface of the haunch component 9 is cut off by using a small handheld cutting machine.

[0083] 3.2 Work flow

[0084] Step 1, mold assembly: according to different embodiments, all mold components such as mold (barrel body), mold (barrel ear), mold (bottom plate) are fixed by bolt connection.

[0085] Step 2, pouring concrete: pour the same strength grade of concrete as the cast-in-place slab 2 into the mold, and vibrate and compact the poured concrete, and use a pressure groove steel pipe 1-6 to press a circular groove 1-1 on the surface of the poured concrete, and insert the connecting rod 8-3 when there is a haunch component 9.

[0086] Step 3, mold removal: after the concrete reaches a certain strength, remove the bolts and remove all molds to obtain the formed concrete support.

[0087] Step 4, support installation: according to the spacing and distribution of the upper layer of the plate 2-2 and the lower layer of the plate 2-1 or when there is a haunch component, install the formed support in the cast-in-place slab 2.

[0088] Step 5, support system installation: install and place the support system composed of the formwork 2-4 below the upper structure plate 4-3, the support block 4-1, the second horizontal rod 4, the top support 3-2, the first horizontal rod 3-3, the vertical rod 3 and the sweeping rod 3-1 on the support; when there is a haunch component 9, a small electric drill is used to drill a hole at the intersection where the connecting rod 8-3 passes through the haunch formwork 9-2, then the steel pipe tray 8-1 with the tray sleeve 8-2 is installed, and finally the other support system components described in this step are installed.

[0089] Step 6, integral pouring: after the concealed work is accepted, the cast-in-place slab 2, the retaining wall 2-3, the upper structure slab 4-3 and the haunched member 9 (if any) are integrally poured with concrete and vibrated and compacted.

[0090] Step 7, removal of the support system and turnover: after the concrete strength grade reaches 100% of the design strength grade, the support system is removed and is turned over for use in other identical parts in cooperation with the prefabricated concrete support.

[0091] The above shows and describes the basic principles and main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the structural relationship and principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A method of constructing a concrete abutment support structure, characterised in that, The method comprises the following steps: Step 1, mold assembly: all mold components including mold barrel, mold barrel ear, mold bottom plate are fixed by bolt connection; Step 2, pouring concrete: pour the same strength grade concrete as the cast-in-place slab (2) into the mold, and vibrate the poured concrete to compact it, and use the pressure groove steel pipe (1-6) to press the circular groove (1-1) on the surface of the poured concrete, and when there is a haunch component (9), insert the connecting rod (8-3); Step 3, mold removal: after the concrete reaches a certain strength, remove the bolts and remove all molds to obtain the shaped concrete support; Step 4, support installation: according to the spacing and distribution of the upper layer reinforcement (2-2) and the lower layer reinforcement (2-1) of the slab or when there is a haunch component, install the shaped support in the cast-in-place slab (2); Step 5, support system installation: install the support system composed of the formwork (2-4), support block (4-1), No. 2 horizontal rod (4), top support (3-2), No. 1 horizontal rod (3-3), vertical rod (3), and floor sweeping rod (3-1) below the upper structure slab (4-3) on the support; when there is a haunch component (9), a small electric drill is needed to drill a hole at the intersection of the connecting rod (8-3) passing through the haunch formwork (9-2), then install the steel pipe tray (8-1) with the tray sleeve (8-2), and finally install other support system components of this step; Step 6, overall pouring: after the concealed engineering is accepted, the cast-in-place slab (2), retaining wall (2-3), upper structure slab (4-3), and haunch component (9) are poured with concrete and vibrated to compact it; Step 7, support system removal and turnover: after the concrete strength grade reaches 100% of the design strength grade, the support system is removed and turned over for use with the precast concrete support in other similar parts; The concrete support structure for cast-in-place slab and haunch used in the above construction method comprises a concrete support and a support system fixed on the concrete support; The concrete support comprises a support body structure and a vertical rod butt joint structure at the upper end of the support body; the support body structure is made of concrete pouring, and its surface is rough and its height is equal to the thickness of the cast-in-place slab (2); The support system comprises vertical rods (3), floor sweeping rods (3-1), No. 1 horizontal rods (3-3), top supports (3-2), No. 2 horizontal rods (4), support blocks (4-1), and formworks (2-4); the vertical rods (3) are multiple, each vertical rod (3) is inserted into the vertical rod butt joint structure of the concrete support, the bottom of each vertical rod (3) is fixedly connected with the floor sweeping rod (3-1), and the upper part of each vertical rod (3) is provided with a T-shaped top support (3-2), which is connected with the No. 2 horizontal rod (4) and serves as a lifting for the No. 2 horizontal rod (4); the upper end surface of the No. 2 horizontal rod (4) is provided with multiple support blocks (4-1), and the formwork (2-4) is arranged at the upper end of the multiple support blocks (4-1).

2. The construction method of a concrete support support structure according to claim 1, characterized by: The support body structure is in the shape of a cylinder, a circular truncated cone, or a cuboid.

3. The construction method of a concrete support support structure according to claim 1, characterized by: The stand rod butt joint structure is a tubular circular groove (1-1) arranged on the upper end surface of the support body structure and recessed downward, and the tubular circular groove (1-1) is embedded with the lower part of the stand rod (3).

4. The construction method of a concrete support support structure according to claim 1, characterized by: The support leg structure is a plurality of No. 2 support legs (6-7) arranged on the lower end surface of the support body structure in a circumferential direction, and the plurality of No. 2 support legs (6-7) form gaps for the steel bars to pass through.

5. The construction method of a concrete support support structure according to claim 1, characterized by: The support leg structure is a plurality of No. 3 support legs (7-9) arranged on the lower end surface of the support body structure in a circumferential direction, and the plurality of No. 3 support legs (7-9) form gaps for the steel bars to pass through.

6. The construction method of a concrete support support structure according to claim 1, characterized by: The support system at the haunch is arranged at the internal corner; The support system at the haunch is composed of a formwork (2-4), a support block (4-1), a No. 2 horizontal rod (4), a jacking support (3-2), a stand rod (3), a steel pipe tray (8-1), a tray sleeve (8-2), and a connecting rod (8-3), and the support system is integrally arranged on the No. 1 concrete support (1). The connecting rod (8-3) is inserted into the center position of the upper surface of the No. 1 concrete support (1) to a depth of at least 5 cm, and the total height of the connecting rod (8-3) is the insertion depth plus the exposed height. Before the haunch bar (9-1) is bound and the haunch formwork (9-2) is installed, the concrete support (1) with the connecting rod (8-3) is installed at the lower part of the haunch component (9), and then the haunch formwork (9-2) is installed, and a hole is opened in the corresponding position of the haunch formwork (9-2) at the exposed position of the connecting rod (8-3). The stand rod (3) is seated on the steel pipe tray (8-1), and the steel pipe tray (8-1) is attached with a tray sleeve (8-2) at the lower part, and the tray sleeve (8-2) is a hollow cylinder which is sleeved on the connecting rod (8-3).

7. The construction method of a concrete support support structure according to claim 2, characterized by: The one-mold barrel body (1-2) is a hollow shell structure with both ends open, a one-mold barrel ear (1-3) protruding outward from the lower edge of the one-mold barrel body (1-2), and a one-mold bottom plate (1-4) detachably connected with the one-mold barrel ear, which can cover and close the lower end opening of the one-mold barrel body (1-2).

8. The construction method of the concrete support structure according to claim 3, characterized in that: The second mold barrel body (6-1) includes a hollow shell structure and is open at both upper and lower ends, a second mold barrel lug (6-2) protruding outward from the lower edge of the second mold barrel body, and a second mold bottom plate (6-5) detachably connected with the second mold barrel lug (6-2), wherein the second mold bottom plate (6-5) can cover and close the open lower end of the second mold barrel body; the second mold bottom plate (6-5) is attached with a plurality of second mold supporting legs (6-6) having a hollow shell structure and being open at the upper end, the second mold supporting legs (6-6) are symmetrically arranged along the periphery of the second mold bottom plate (6-5) to form gaps between the supporting legs, and the gaps can satisfy the requirement of passing through the reinforcing bars; a plurality of holes are formed in the second mold bottom plate (6-5), the shape of the holes is consistent with the shape of the upper end opening of the second mold supporting legs (6-6), and the upper end of the second mold supporting legs (6-6) can be embedded into the holes.

9. The construction method of the concrete support support structure according to claim 4, characterized in that: The third mold barrel body (7-2) includes a hollow shell structure and is open at the lower end, a third mold barrel lug (7-3) protruding outward from the lower edge of the mold barrel body, and a third mold bottom plate (7-5) detachably connected with the third mold barrel lug, wherein the third mold bottom plate (7-5) can cover and close the open lower end of the third mold barrel body (7-2); the third mold bottom plate (7-5) is attached with a plurality of third mold supporting legs (7-7) having a hollow shell structure and being open at the upper end, the third mold supporting legs (7-7) are symmetrically arranged along the periphery of the second mold bottom plate (6-5) to form gaps between the supporting legs, and the gaps can satisfy the requirement of passing through the reinforcing bars; a plurality of holes are formed in the third mold bottom plate (7-5), the shape of the holes is consistent with the shape of the upper end opening of the third mold supporting legs (7-7), and the upper end of the third mold supporting legs (7-7) can be embedded into the holes; and the top surface of the third mold barrel body (7-2) is upwardly protruded to form a hollow square vertical rod butt joint structure open at the upper end.

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