Method for pouring oblique grid special-shaped cross steel pipe concrete structure

Abstract

The application discloses a pouring method for a skew grid special-shaped cross steel pipe concrete structure, and adopts a jacking method to pour concrete from bottom to top in layers synchronously into a bottom layer and a reserved flow hole above a top layer horizontal partition plate in a twisted waist-shaped steel pipe, so that the filling effect of the concrete compactness of the lower surface of each layer horizontal partition plate and the elevation control of the layer-by-layer pouring can be ensured; whether a cavity exists at the junction of the bottom layer and the intermediate layer horizontal partition plate, a vertical partition plate and the upper surface of the wall of the twisted waist-shaped steel pipe is observed through an endoscope grouting pipe, so that whether the concrete pouring compactness meets the requirements is judged; when the concrete pouring compactness is insufficient, a high-pressure grouting pump is connected through the endoscope grouting pipe to supplement grouting to the cavity, so that the concrete compactness of the upper surface of the bottom layer and the intermediate layer horizontal partition plate meets the pouring requirements, and the concrete pouring quality of the twisted waist-shaped steel pipe with the horizontal partition plate and the vertical partition plate is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a method for pouring a steel pipe concrete structure with a skew grid and a special cross. BACKGROUND

[0002] The steel pipe concrete structure with a skew grid and a special cross, also known as a skew grid structure with steel pipe concrete, is formed by crossing two-way inclined steel pipe concrete columns to form a skew grid outer cylinder, replacing traditional vertical columns to form an efficient lateral force resisting unit; combined with a concrete core cylinder or a frame inner cylinder to form a double lateral force resisting system. The skew grid forms Y-shaped nodes and X-shaped nodes at the intersection, and the X-shaped node is in the form of a twisted waist cylinder as a transition node for smooth transition. When constructing the X-shaped twisted waist cylinder node, high throwing method is used to pour concrete in the X-shaped twisted waist steel pipe. Due to the influence of the vertical partition and multiple horizontal partitions arranged in the X-shaped twisted waist steel pipe, there is a problem of not being dense when pouring concrete in the X-shaped twisted waist steel pipe. The gas in the X-shaped twisted waist steel pipe cannot be discharged in time, the concrete is difficult to vibrate, or it cannot spread or flow to a deeper position due to its own fluidity, resulting in gas cavities below the horizontal partition and at the junction of the horizontal partition and the pipe wall in the X-shaped twisted waist steel pipe, thereby affecting the structural strength of the X-shaped twisted waist cylinder. The vertical partition and multiple horizontal partitions arranged in the X-shaped twisted waist steel pipe are necessary components, and their purpose is to ensure the stiffness of the steel pipe concrete column at the intersection. The number of horizontal partitions in the X-shaped twisted waist steel pipe can be increased or decreased as needed. The high throwing method is a high-position pouring and non-vibrating method for pouring concrete by pumping, that is, using the principle of free fall to pour self-compacting concrete from the top to the bottom of the skew grid steel pipe to complete the pouring of concrete and form a skew grid.

[0003] In addition, due to the use of the layered pouring method in the steel pipe concrete structure with a skew grid and a special cross, the concrete aggregate floats in the cement paste under the action of buoyancy in the static state. When a certain vibration frequency and amplitude act on it, when the particle size of the aggregate is less than the limit value, the small particle size part will not sink to fill the concrete skeleton body, but will move relatively to the surface of the concrete; especially for pumped concrete and high fluidity concrete, a layer of foam-like paste often appears on the surface after pouring and vibrating, which is usually a mixture of components such as cement, fly ash, mineral powder, fine aggregate, and water, gas bubbles, commonly known as "floating slurry". Since the floating slurry layer basically has no coarse aggregate and has a relatively large water-cement ratio, the existence of the floating slurry layer will seriously affect the interlayer bonding quality of the concrete, and if a layer of concrete is directly poured on the floating slurry layer, the integrity of the upper and lower layers of concrete will be poor. Therefore, the floating slurry on the surface of the lower layer of concrete needs to be removed before pouring the upper layer of concrete, and how to clean the floating slurry of the concrete at the intersection of the skew grid becomes a difficult point. SUMMARY

[0004] The application aims to provide a skew grid special-shaped cross steel pipe concrete structure pouring method to solve the problem of poor pouring quality caused by the insufficient compaction of concrete at the cross section of the skew grid and the failure to clean the floating slurry layer.

[0005] To solve the above technical problems, the application provides a skew grid special-shaped cross steel pipe concrete structure pouring method, which comprises the following steps:

[0006] Step S1, two first pre-buried pump pipes with downward opening direction are symmetrically pre-buried on the lower skew steel pipe close to the twisted waist-shaped steel pipe; two second pre-buried pump pipes with downward opening direction are symmetrically pre-buried on the two limb pipes between the bottom layer of the twisted waist-shaped steel pipe and the horizontal partition plate above the same; a second endoscope grouting pipe is pre-buried in the two limb pipes of the twisted waist-shaped steel pipe, and the second endoscope grouting pipe is aligned at the intersection of each intermediate layer horizontal partition plate and the upper surface of the vertical partition plate;

[0007] Step S2, the two first pre-buried pump pipes are connected to the three-way pumping pipe through the stop valve, the stop valve is opened, the concrete is synchronously poured from bottom to top to the flow hole reserved above the bottom layer horizontal partition plate of the twisted waist-shaped steel pipe by using the lifting method through the connection of the three-way pumping pipe and the concrete pumping device, the pouring is stopped, the stop valve is closed, the three-way pumping pipe is removed, and the first pouring hole is plugged;

[0008] Step S3, after the initial setting of the poured concrete, a long handle tool is inserted into the twisted waist-shaped steel pipe through the open top of the same to clean the floating slurry layer on the bottom layer horizontal partition plate, and then the floating slurry residue in the pipe is discharged and cleaned through water flushing through the flow hole;

[0009] Step S4, the first endoscope grouting pipe is inserted into the flow hole to observe whether there is a cavity at the intersection of the bottom layer horizontal partition plate and the vertical partition plate in the twisted waist-shaped steel pipe, when there is a cavity, the cavity is supplemented by grouting through the connection of the first endoscope grouting pipe and the high-pressure grouting pump, and when there is no cavity, the flow hole is plugged;

[0010] Step S5, the two second pre-buried pump pipes are connected to the three-way pumping pipe through the stop valve, the stop valve is opened, the concrete is continuously synchronously poured to the flow hole reserved above the top layer horizontal partition plate by using the lifting method through the connection of the three-way pumping pipe and the concrete pumping device, the pouring is stopped, the stop valve is closed, the three-way pumping pipe is removed, and the second pouring hole is plugged;

[0011] Step S6, after the initial setting of the poured concrete, the floating slurry layer on the top layer horizontal partition plate is cleaned by the method of step S3;

[0012] Step S7, insert the first endoscope grouting pipe into the top layer horizontal partition through the reserved flow hole on the top layer horizontal partition to observe whether there is cavity at the junction of the top layer horizontal partition and the vertical partition in the twisted waist-shaped steel pipe, if there is cavity, connect the high-pressure grouting pump to the first endoscope grouting pipe to supplement grouting, if there is no cavity, block the flow hole;

[0013] Step S8, insert the first endoscope grouting pipe into the twisted waist-shaped steel pipe through the observation hole on the outer wall of the twisted waist-shaped steel pipe above the intermediate layer horizontal partition to observe whether there is cavity at the junction of the intermediate layer horizontal partition and the pipe wall of the twisted waist-shaped steel pipe, if there is cavity, supplement grouting through the first endoscope grouting pipe, if there is no cavity, block the observation hole, observe whether there is cavity at the junction of the intermediate layer horizontal partition and the vertical partition through the second endoscope grouting pipe, if there is cavity, supplement grouting through the second endoscope grouting pipe, if there is no cavity, do not perform supplementary grouting.

[0014] Further, the diagonal grid special-shaped cross steel pipe concrete structure pouring method provided by the present application further comprises:

[0015] Step S9, install upper diagonal steel pipes above the two limbs of the twisted waist-shaped steel pipe respectively, insert the three-way pump pipe connecting elbow pipe into the upper diagonal steel pipes and connect the concrete pumping equipment, and start the concrete pumping equipment to synchronously pour concrete into the upper two diagonal steel pipes by high-throwing method.

[0016] Further, the diagonal grid special-shaped cross steel pipe concrete structure pouring method provided by the present application further comprises that in step S3, the first endoscope grouting pipe is used to extend into the twisted waist-shaped steel pipe from the flow hole to observe whether the floating layer is cleaned; if not, repeat step S3; if yes, execute step S4.

[0017] Further, the diagonal grid special-shaped cross steel pipe concrete structure pouring method provided by the present application further comprises that before pouring concrete into the twisted waist-shaped steel pipe, a plurality of air holes are arranged around the center hole of each layer horizontal partition.

[0018] Further, the diagonal grid special-shaped cross steel pipe concrete structure pouring method provided by the present application further comprises that a dredging hole is arranged on the vertical partition.

[0019] Further, the diagonal grid special-shaped cross steel pipe concrete structure pouring method provided by the present application further comprises that the first endoscope grouting pipe and the second endoscope grouting pipe are the same in structure, and each comprises a double-layer sleeve pipe with a cavity and a camera arranged at the top end of the double-layer sleeve pipe, the cavity of the double-layer sleeve pipe is a grouting channel, and a grouting outlet is arranged on the outer pipe of the double-layer sleeve pipe close to the camera and connected with the grouting channel.

[0020] Further, the oblique grid special-shaped cross steel pipe concrete structure pouring method provided by the application further comprises the following steps:

[0021] Further, the oblique grid special-shaped cross steel pipe concrete structure pouring method provided by the application further comprises the following steps:

[0022] The grouting pipe piece is used to replace the second endoscope grouting pipe, and the grouting pipe piece comprises grouting hard pipes vertically arranged in the limb conduits of the twisted waist-shaped steel pipe, a plurality of grouting soft pipes connected in a radial manner below the grouting hard pipes, and the grouting soft pipes are attached to the lowermost intermediate layer horizontal partition plate and extend to the inner walls of the limb conduits, and extend upwards to above the top layer horizontal partition plate through the inner walls of the limb conduits;

[0023] The grouting hard pipes of the grouting pipe piece are connected with the high-pressure grouting pump, the high-pressure grouting pump is started to pour high-pressure high-strength grouting material into the grouting hard pipes and the grouting soft pipes connected with the grouting hard pipes, when the grouting material flows out from the upper ends of the grouting soft pipes, the high-pressure grouting pump is stopped, the upper ends of the grouting soft pipes are closed, and the high-pressure grouting pump is restored to continue grouting the grouting pipe piece, the grouting material in the grouting soft pipes is broken and flows out under the high-pressure impact to fill the junctions of the lowermost intermediate layer horizontal partition plate, the pipe wall of the twisted waist-shaped steel pipe and the vertical partition plate, and the grouting is stopped.

[0024] Further, the oblique grid special-shaped cross steel pipe concrete structure pouring method provided by the application further comprises the following steps:

[0025] Further, the oblique grid special-shaped cross steel pipe concrete structure pouring method provided by the application further comprises the following steps:

[0026] Compared with the prior art, the application has the following beneficial effects:

[0027] The present invention provides a method for pouring concrete into an obliquely intersecting grid-shaped steel pipe concrete structure. This method connects to a concrete pumping device via a first and second pre-embedded pump pipe, employing a jacking method to simultaneously pour concrete layer by layer from bottom to top into the pre-reserved flow holes above the bottom and top horizontal partitions within the twisted waist-shaped steel pipe. This ensures the filling effect of the concrete density on the lower surface of each layer of horizontal partitions and controls the elevation of each layer of pouring. The method also allows for observation of the bottom and top horizontal partitions, vertical partitions, and twisted waist-shaped steel pipes via a first endoscopic grouting pipe. The presence of cavities at the junction of the upper surface of the pipe wall and the junction of the horizontal and vertical partitions in the middle layer is observed through the second endoscopic grouting pipe to determine whether the concrete pouring density meets the requirements. If the concrete pouring density is insufficient, the cavity is supplemented by grouting through the high-pressure grouting pump connected to the first and second endoscopic grouting pipes, so that the concrete density on the upper surface of each layer of horizontal partitions meets the pouring requirements, thereby improving the concrete pouring quality of the twisted waist-shaped steel pipe with horizontal and vertical partitions.

[0028] The present invention provides a method for pouring concrete for oblique grid irregular cross steel pipes. By using a long-handled tool to remove the laitance layer on the bottom and top horizontal partitions through the opening above the twisted waist-shaped steel pipe, and by cleaning the laitance residue on the bottom and top horizontal partitions with water, the laitance layer inside the twisted waist-shaped steel pipe is cleaned during layered pouring. This overcomes the problem that the high-throw method cannot clean the laitance when pouring concrete for twisted waist-shaped steel pipes.

[0029] The present invention provides a method for pouring concrete for oblique grid irregular cross steel pipe structures. By simultaneously pouring the two limb pipes of the oblique grid irregular cross steel pipe, the reliability, stability and quality of concrete pouring for oblique grid irregular cross steel pipe structures can be improved.

[0030] The present invention provides a method for pouring concrete structures using obliquely intersecting grid-shaped steel pipes. The flow holes on the twisted waist-shaped steel pipes can, on the one hand, control the elevation of the concrete pouring in layers, on the other hand, be used to insert an endoscope grouting pipe to observe the concrete density at the junction of the bottom horizontal partition, and on the other hand, be used to supplement the grouting of the cavity at the junction of the bottom and middle horizontal partitions, so as to avoid the problem of insufficient concrete density. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of an obliquely intersecting grid of irregularly shaped intersecting steel-concrete composite structures.

[0032] Figure 2 This is a schematic diagram of the three-dimensional structure of a twisted waist-shaped steel pipe;

[0033] Figure 3 It is a three-dimensional perspective structural diagram of a twisted waist-shaped steel pipe;

[0034] Figure 4 is a structural schematic diagram of symmetrically pre-burying a first pre-burying pump pipe in the lower diagonal steel pipe of the twisted waist-shaped steel pipe in Example 1;

[0035] Figure 5 is a structural schematic diagram of synchronously pouring concrete into the lower diagonal steel pipe from bottom to top by the jacking method in Example 1;

[0036] Figure 6 is a structural schematic diagram of synchronously pouring concrete into the twisted waist-shaped steel pipe above the bottom layer horizontal partition by the jacking method along the lower diagonal steel pipe from bottom to top in Example 1;

[0037] Figure 7 is a structural schematic diagram of observing the concrete pouring compactness at the junction of the bottom layer horizontal partition and the upper surface of the vertical partition by the endoscope grouting pipe after cleaning the concrete floating layer above the bottom layer horizontal partition in Example 1;

[0038] Figure 8 is a structural schematic diagram of pre-burying the endoscope grouting pipe in the twisted waist-shaped steel pipe in Example 1;

[0039] Figure 9 is a structural schematic diagram of pouring the upper layer concrete into the twisted waist-shaped steel pipe above the top layer horizontal partition by the jacking method in Example 1;

[0040] Figure 10 is a structural schematic diagram of observing the concrete pouring compactness on the upper surface of the middle layer horizontal partition by the endoscope grouting pipe in Example 1;

[0041] Figure 11 is a structural schematic diagram of installing the upper diagonal steel pipe on the twisted waist-shaped steel pipe and pouring concrete into the upper diagonal steel pipe by the high throwing method in Example 1;

[0042] Figure 12 is a structural schematic diagram of opening a gas permeation hole on the horizontal partition from the top view;

[0043] Figure 13 is a structural schematic diagram of opening a dredging hole on the vertical partition;

[0044] Figure 14 is a structural schematic diagram of an endoscope;

[0045] Figure 15 is a structural schematic diagram of symmetrically pre-burying a third pre-burying pump pipe and a fourth pre-burying pump pipe in the lower diagonal steel pipe of the twisted waist-shaped steel pipe in Example 2;

[0046] Figure 16is a structural schematic diagram of pouring concrete into the twisted waist-shaped steel pipe from bottom to top by jacking method along the lower diagonal steel pipe in Example 2;

[0047] Figure 17 is a structural schematic diagram of observing the concrete pouring density at the intersection between the bottom layer horizontal partition plate and the upper surface of the vertical partition plate by the endoscope grouting pipe in Example 2;

[0048] Figure 18 is a structural schematic diagram of embedding the endoscope grouting pipe in the twisted waist-shaped steel pipe in Example 2;

[0049] Figure 19 is a structural schematic diagram of pouring concrete into the twisted waist-shaped steel pipe from bottom to top by jacking method in Example 2;

[0050] Figure 20 is a structural schematic diagram of observing the concrete pouring density at the intersection between the bottom layer horizontal partition plate and the upper surface of the vertical partition plate by the endoscope grouting pipe in Example 2;

[0051] Figure 21 is a structural schematic diagram of pouring concrete into the twisted waist-shaped steel pipe from bottom to top by jacking method in Example 2;

[0052] Figure 22 is a structural schematic diagram of embedding the endoscope grouting pipe in the twisted waist-shaped steel pipe in Example 2;

[0053] Figure 23 is a structural schematic diagram of embedding the endoscope grouting pipe in the twisted waist-shaped steel pipe in Example 2;

[0054] Figure 24 is a structural schematic diagram of embedding the endoscope grouting pipe in the twisted waist-shaped steel pipe in Example 2;

[0055] The figure shows:

[0056] 1, diagonal grid special-shaped cross steel pipe concrete structure, 2, twisted waist-shaped steel pipe, 3, lower diagonal steel pipe, 4, upper diagonal steel pipe;

[0057] 101, first pouring hole, 102, first pre-embedded pump pipe, 103, stop valve, 104, three-way pumping pipe, 105, concrete, 106, bottom layer horizontal partition, 107, flowing hole, 108, floating slurry layer, 109, first endoscopic grouting pipe, 110, vertical partition, 111, second endoscopic grouting pipe, 112, intermediate layer horizontal partition, 113, second pouring hole, 114, top layer horizontal partition, 115, observation hole, 116, air vent, 117, dredging hole, 118, third pre-embedded pump pipe, 119, fourth pre-embedded pump pipe, 120, double-layer sleeve pipe, 121, camera, 122, grouting channel, 123, grout outlet, 124, second pre-embedded pump pipe, 125, elbow pipe, 126, grouting pipe fitting, 127, grouting hard pipe, 128, grouting hose, 129, central through hole. DETAILED DESCRIPTION

[0058] The present application will be described in detail below with reference to the drawings. The advantages and features of the present application will be more apparent from the following description. It should be noted that the drawings are very simplified and use non-precise proportions, only for the purpose of facilitating and clarifying the purpose of assisting the description of the embodiments of the present application.

[0059] Embodiment one

[0060] Please refer to Figure 24 , the embodiment of the present application provides a skew grid special-shaped cross steel pipe concrete structure pouring method, comprising:

[0061] Step S1, the first and second pre-embedded pump pipes and the second endoscopic grouting pipe are pre-embedded. Specifically:

[0062] Two first pouring holes 101 are opened on the lower skew steel pipe 3 near the twisted waist-shaped steel pipe 2 at the intersection part, two first pre-embedded pump pipes 102 are symmetrically pre-embedded in the lower skew steel pipe 3 through the first pouring holes 101, and the opening direction of the first pre-embedded pump pipes 102 is arranged downward; two second pouring holes 113 are opened on the two limb pipes of the twisted waist-shaped steel pipe 2 between the bottom layer and the upper layer horizontal partition, two second pre-embedded pump pipes 124 are symmetrically pre-embedded in the twisted waist-shaped steel pipe 2 through the second pouring holes 113, and the opening direction of the second pre-embedded pump pipes 124 is arranged downward; the second endoscopic grouting pipe 111 is pre-embedded in the two limb pipes of the twisted waist-shaped steel pipe 2, so that the second endoscopic grouting pipe 111 is aligned at the intersection of each intermediate layer horizontal partition 112 and the upper surface of the vertical partition 110, as shown in Figure 4 and Figure 8 .

[0063] Step S2, the concrete is poured to the bottom layer horizontal partition by the jacking method. Specifically:

[0064] Two first pre-embedded pump pipes 102 are connected to the three-way pumping pipe 104 through the stop valve 103. After opening the stop valve 103, the lower oblique steel pipe 3 is synchronously poured with concrete 105 from bottom to top to the reserved flow hole 107 above the bottom layer horizontal partition plate 106 of the twisted waist-shaped steel pipe 2 by using the jacking method through connecting the concrete pumping equipment to the three-way pumping pipe 104, the pouring is stopped, the stop valve 103 is closed, the three-way pumping pipe 104 is removed, and the first pouring hole 101 is blocked, as shown in Figures 4 to 6 . The stop valve 103 is arranged outside the twisted waist-shaped steel pipe 2, and after the stop valve 103 is removed, the first pouring hole 101 is exposed and can be blocked by welding a metal plate to cover the first pouring hole 101. The stop valve 103 can determine the pumping amount of concrete after pouring, and the three-way pumping pipe 104 can be removed in advance. The twisted waist-shaped steel pipe 2 is located at the intersection of the oblique grid special-shaped intersection steel pipe concrete structure 1, as shown in Figure 1 . The number of horizontal partition plates in the twisted waist-shaped steel pipe 2 can be increased or decreased according to requirements, as shown in Figures 2 to 4 .

[0065] Step S3, cleaning of the floating slurry at the bottom layer horizontal partition plate. Specifically,

[0066] After the initial setting of the concrete to be poured, a long-handled tool such as a shovel, chisel or brush is inserted into the twisted waist-shaped steel pipe 2 through the open top of the twisted waist-shaped steel pipe 2 to clean the floating slurry layer 108 on the bottom layer horizontal partition plate 106, and then the floating slurry residue in the twisted waist-shaped steel pipe 2 is washed out through the flow hole 107, as shown in Figures 6 to 7 . In step S3, a first endoscopic grouting pipe 109 is also inserted into the twisted waist-shaped steel pipe 2 from the flow hole 107 to observe whether the floating slurry layer 108 in the twisted waist-shaped steel pipe 2 is clean; if not, step S3 is repeated; if yes, step S4 is performed.

[0067] Step S4, cavity monitoring and processing at the intersection of the bottom layer horizontal partition plate and the vertical partition plate. Specifically,

[0068] The first endoscopic grouting pipe 109 is inserted into the flow hole 107 reserved above the bottom layer horizontal partition plate 106 to observe whether there is a cavity at the intersection of the bottom layer horizontal partition plate 106 and the vertical partition plate 110 in the twisted waist-shaped steel pipe 2. If there is a cavity, it is determined that the concrete compactness is insufficient, otherwise it is determined that the concrete compactness meets the requirements. When there is a cavity, a high-pressure grouting pump is connected to the first endoscopic grouting pipe 109 to supplement grouting to ensure the concrete compactness at the intersection of the bottom layer horizontal partition plate 106 and the vertical partition plate 110; when there is no cavity, the flow hole 107 is blocked, as shown in Figure 7The first endoscope grouting pipe 109 includes a double-layer sleeve 120 with a cavity, which is a grouting channel 122, and a camera 121 arranged at the top end of the double-layer sleeve 120. An outflow port 123 is arranged on the outer tube of the double-layer sleeve 120 near the camera 121 and is in communication with the grouting channel 122. The outflow port 123 is connected to a high-pressure grouting pump 125. The high-pressure grouting pump 125 is connected to a second pre-embedded pump pipe 124 through a three-way pump pipe 104. The three-way pump pipe 104 is connected to the first endoscope grouting pipe 109 through a stop valve 103. The three-way pump pipe 104 is connected to a concrete pumping device through a second pre-embedded pump pipe 124. The concrete pumping device is used to continue to synchronously pour concrete to the top layer horizontal partition plate 114 through the two limbs of the twisted waist-shaped steel pipe 2 by the lifting method. The pouring is stopped, the stop valve 103 is closed, the three-way pump pipe 104 is removed, and the second pouring hole 113 is plugged, as shown in Figure 14 . .

[0069] Step S5: Pouring concrete to the top layer horizontal partition plate by the lifting method. Specifically,

[0070] The two second pre-embedded pump pipes 124 are connected to the three-way pump pipe 104 through the stop valve 103. The stop valve 103 is opened. The concrete pumping device is connected to the three-way pump pipe 104. The twisted waist-shaped steel pipe 2 is continuously synchronously poured with concrete to the top layer horizontal partition plate 114 through the two limbs by the lifting method. The pouring is stopped. The stop valve 103 is closed. The three-way pump pipe 104 is removed. The second pouring hole 113 is plugged, as shown in Figure 9 . The installation of the stop valve 103 can be referred to the first pre-embedded pump pipe 102.

[0071] Step S6: Cleaning the floating slurry layer on the top layer horizontal partition plate. Specifically,

[0072] After the initial setting of the poured concrete, the floating slurry layer 108 on the top layer horizontal partition plate 114 is cleaned by the method of step S3. The top layer horizontal partition plate 114 is shown in the case after the floating slurry layer 108 is cleaned. Figure 9

[0073] Step S7: Cavity monitoring and processing at the intersection of the top layer horizontal partition plate and the vertical partition plate. Specifically,

[0074] The first endoscope grouting pipe 109 is inserted through the flow hole 107 reserved above the top layer horizontal partition plate 114 to observe whether there is a cavity at the intersection of the top layer horizontal partition plate 114 and the vertical partition plate 110 in the twisted waist-shaped steel pipe 2. If there is a cavity, it is judged that the concrete compactness pouring is insufficient. Otherwise, it is judged that the concrete compactness pouring meets the requirements. When there is a cavity, the cavity is supplemented by grouting through the first endoscope grouting pipe 109 connected to the high-pressure grouting pump to ensure the concrete pouring compactness at the intersection of the top layer horizontal partition plate 114 and the vertical partition plate 110. When there is no cavity, the flow hole 107 is plugged. The graphical relationship at the bottom layer horizontal partition plate 106 can be referred to.

[0075] Step S8: Cavity monitoring and processing at the intersection of the middle layer horizontal partition plate, the pipe wall, and the vertical partition plate. Specifically,

[0076] The first endoscopic grouting pipe 109 is inserted through the observation hole 115 opened on the outer wall of the twisted waist-shaped steel pipe 2 above each intermediate layer horizontal partition plate 112 to observe whether there is a cavity at the junction of the intermediate layer horizontal partition plate 112 and the pipe wall of the twisted waist-shaped steel pipe 2, and when there is a cavity, a high-pressure grouting pump connected through the first endoscopic grouting pipe 109 is used to supplement grouting to the cavity to ensure the concrete pouring compactness at the junction of the intermediate layer horizontal partition plate 112 and the vertical partition plate 110, and when there is no cavity, the observation hole 115 is blocked. Figure 10 When there is a cavity, it is judged that the concrete pouring compactness at the corresponding junction is insufficient, otherwise it is judged that the concrete pouring compactness meets the requirements. The second endoscopic grouting pipe 111 has the same structure as the first endoscopic grouting pipe 109.

[0077] Through steps S1 to S8, the concrete pouring quality in the twisted waist-shaped steel pipe 2 at the intersection node can be realized, and the problem of insufficient concrete pouring compactness caused by the influence of the horizontal partition plate and the vertical partition plate 110 on the twisted waist-shaped steel pipe 2 is avoided.

[0078] In order to quickly pour the upper diagonal steel pipe 4 of the twisted waist-shaped steel pipe 2 node, the method can further include:

[0079] Step S9, pouring concrete into the upper diagonal steel pipe by high throwing method. Specifically:

[0080] The upper diagonal steel pipe 4 is installed above the two limbs of the twisted waist-shaped steel pipe 2, the three-way pump pipe 104 is connected to the elbow pipe 125, which is inserted into the upper diagonal steel pipe 4 installed on the twisted waist-shaped steel pipe 2 and connected to the concrete pumping equipment, and the concrete pumping equipment is started to synchronously pour concrete into the two upper diagonal steel pipes 4 by high throwing method, that is, the concrete is poured by high throwing method to cover the twisted waist-shaped steel pipe 2 and the upper diagonal steel pipe 4, as shown in Figure 11 The elbow pipe 125 can be a 90-degree elbow pipe.

[0081] In order to improve the pouring quality of the concrete in the twisted waist-shaped steel pipe 2 and avoid the problem of insufficient concrete compactness, the diagonal grid special-shaped intersection steel pipe concrete structure pouring method provided by the embodiment of the application can be used before pouring the concrete in the twisted waist-shaped steel pipe 2, a plurality of air vents 116 are opened around the center hole of each layer of horizontal partition plate, as shown in Figure 12As shown in the figure. When pouring concrete into the twisted waist-shaped steel pipe 2 by the lifting method through the air vent 116, the concrete slurry can penetrate or exhaust through the air vent 116, thereby improving the concrete pouring quality at the node of each layer of horizontal partition plate, and avoiding the problem of insufficient concrete density caused by the cavity.

[0082] In order to improve the pouring quality in the two-limb pipeline in the twisted waist-shaped steel pipe 2, the oblique grid special-shaped cross steel pipe concrete structure pouring method provided by the embodiment of the application is provided with a dredging hole 117 on the vertical partition plate 110, as shown in the figure. Figure 13 Through the dredging hole 117, the poured concrete slurry in the two-limb pipeline in the twisted waist-shaped steel pipe 2 can penetrate each other or exhaust, thereby avoiding the problem of insufficient concrete density caused by the cavity in the two-limb pipeline.

[0083] In order to achieve the purpose of supplementing the grouting of the cavity, in the step S4, the step S7 and the step S8, the endoscope without grouting function can be used to replace the first endoscope grouting pipe 109, that is, a simple or conventional endoscope is used to observe whether there is a cavity, and when there is a cavity, the endoscope without grouting function is pulled out, and the grouting pipe is inserted to supplement the grouting of the cavity.

[0084] The oblique grid special-shaped cross steel pipe concrete structure pouring method provided by the embodiment of the application connects the concrete pumping equipment through the first pre-buried pump pipe 102 and the three-way pumping pipe 104, and pours the concrete into the bottom layer of the twisted waist-shaped steel pipe 2 and the reserved flow hole 107 above the top layer of the horizontal partition plate by the lifting method from bottom to top and in layers, thereby ensuring the filling effect of the concrete density of the lower surface of each layer of horizontal partition plate and the elevation control of the layered pouring; the first endoscope grouting pipe 109 is used to observe whether there is a cavity at the junction of the bottom layer and the top layer of the horizontal partition plate and the upper surface of the pipe wall of the vertical partition plate 110 and the twisted waist-shaped steel pipe 2, and the second endoscope grouting pipe 111 is used to observe whether there is a cavity at the junction of the intermediate layer of the horizontal partition plate 112 and the vertical partition plate 110, thereby judging whether the concrete pouring density of the corresponding junction meets the requirements; when the concrete pouring density is insufficient, the corresponding first endoscope grouting pipe 109 or the second endoscope grouting pipe 111 is connected to the high-pressure grouting pump to supplement the grouting of the cavity, thereby making the concrete density of the upper surface of each layer of horizontal partition plate such as the bottom layer, the intermediate layer and the top layer meet the pouring requirements, and improving the concrete pouring quality in the twisted waist-shaped steel pipe 2 with horizontal partition plates and vertical partition plates.

[0085] The pouring method of the skew grid special-shaped cross steel pipe concrete structure provided by the embodiment of the application removes the floating layer 108 on the bottom layer and the top layer horizontal partition plate above the open end of the twisted waist-shaped steel pipe 2 by using a long handle tool, and the floating layer residue on the bottom layer and the top layer horizontal partition plate is cleaned by water flushing, so that the cleaning of the floating layer 108 in the twisted waist-shaped steel pipe 2 is realized when the concrete is poured in layers, and the problem that the floating layer cannot be cleaned when the concrete is poured into the twisted waist-shaped steel pipe 2 by the high throwing method is overcome.

[0086] The pouring method of the skew grid special-shaped cross steel pipe concrete structure provided by the embodiment of the application can improve the reliability, stability and quality of the concrete pouring of the skew grid special-shaped cross steel pipe concrete structure by synchronously pouring the two limb pipes of the skew grid special-shaped cross steel pipe.

[0087] The pouring method of the skew grid special-shaped cross steel pipe concrete structure provided by the embodiment of the application, wherein the flowing hole 107 on the twisted waist-shaped steel pipe 2 can realize the elevation control of the concrete pouring in layers, can be used for inserting the endoscope grouting pipe 109 to observe the concrete compactness pouring condition of the bottom layer horizontal partition plate 106 at the junction, and can be used for supplementing grouting at the cavity at the junction of the bottom layer and the intermediate layer horizontal partition plate 112, thereby avoiding the problem of insufficient concrete pouring compactness.

[0088] Embodiment two

[0089] Please refer to Figures 15 to 21 The pouring method of the skew grid special-shaped cross steel pipe concrete structure provided by the embodiment of the application is an improvement on the basis of the embodiment one, and the difference lies in that:

[0090] The third pre-buried pump pipe 118 is symmetrically pre-buried in the lower skew steel pipe 3 through the first pouring hole 101, and the third pre-buried pump pipe 118 is arranged in the opening direction upwards, so that the third pre-buried pump pipe 118 passes through the center through hole 129 of the bottom layer horizontal partition plate 106 in the two limb pipes of the twisted waist-shaped steel pipe 2 and is located above the bottom layer horizontal partition plate 106, thereby replacing the first pre-buried pump pipe 102, as shown in Figure 12 and Figure 15 .

[0091] In step S2, the stop valve 103 is opened, the concrete pumping equipment is started, the three-way pumping pipe 104 and the third pre-buried pump pipe 118 are used to synchronously pour the concrete 105 from bottom to top in the lower skew steel pipe 3 to the reserved flowing hole 107 above the bottom layer horizontal partition plate 106 of the twisted waist-shaped steel pipe 2, the pouring is stopped, the stop valve 103 is closed, the three-way pumping pipe 104 is removed, and the first pouring hole 101 is plugged, as shown in Figures 15 to 16 . The third pre-buried pump pipe 118 can reduce the resistance of the concrete pouring from bottom to top, thereby improving the pouring speed.

[0092] Wherein steps S2 to S4 are the same as in example one, as shown in Figures 17 to 18 .

[0093] Two fourth pre-embedded pump pipes 119 are symmetrically pre-embedded in the two limbs of the twisted waist-shaped steel pipe 2 through the second pouring hole 113, so that the vertical delivery pump pipe passes through the central through hole 129 of the top horizontal partition plate 114 and is located above the top horizontal partition plate 114, replacing the second pre-embedded pump pipe 124 as shown in Figures 15 to 19 .

[0094] In step S5, the three-way pumping pipe 104 is connected to the fourth pre-embedded pump pipe 119, and the concrete pumping equipment is started to continue to synchronously pour concrete into the two limbs of the twisted waist-shaped steel pipe 2 through the fourth pre-embedded pump pipe 119 to the reserved flow hole 107 above the top horizontal partition plate 114 by the jacking method, the pouring is stopped, the three-way pumping pipe 104 is removed, and the second pouring hole 113 is blocked, as shown in Figure 19 . Wherein the fourth pre-embedded pump pipe 119 can extend out of the second pouring hole 113. Wherein the third pre-embedded pump pipe 118 and the fourth pre-embedded pump pipe 119 can also be pre-embedded separately. Through the fourth pre-embedded pump pipe 119, the resistance of pouring concrete from bottom to top can be reduced, and the pouring speed is improved.

[0095] Wherein steps S6 to S7 and step S8 are the same as in example one, as shown in Figures 20 to 21 .

[0096] Wherein the pumping pressure of the jacking method for pumping concrete is:

[0097] P>P1+P2+P3 (1);

[0098] Wherein, P is the pumping pressure of the jacking method for pumping concrete, P1 is the along-the-way pressure loss of concrete flowing in the delivery pipe, P2 is the local pressure loss of concrete passing through the bend pipe and the taper pipe of the delivery pipe, and P3 is the pressure generated by gravity in the vertical height direction.

[0099] Example three

[0100] Please refer to Figures 22 to 23 , the present application provides a skew grid special-shaped cross steel pipe concrete structure pouring method, which is improved on the basis of example one or example two, and the difference lies in:

[0101] The grouting pipe 126 is used to replace the second endoscope grouting pipe 111, and the replacement relationship mainly exists in steps S1 and S7. The grouting pipe 126 comprises a grouting hard pipe 127 vertically arranged in each limb channel of the twisted waist-shaped steel pipe 2, a plurality of grouting soft pipes 128 connected below the grouting hard pipe 127 and distributed in a radial manner, each grouting soft pipe 128 is attached to the lowermost intermediate layer horizontal partition plate 112 and extends to the inner wall of each limb channel, and is attached to the upper end of each limb channel and extends to the upper end of the top layer horizontal partition plate 114. The grouting hard pipe 127 can be located on the axis of each limb channel, and the grouting hard pipe 127 can be a metal pipe.

[0102] The grouting pipe 126 is used for supplementary grouting, the grouting hard pipe 127 of the grouting pipe 126 is connected with the high-pressure grouting pump, the high-pressure grouting pump is started to pour high-pressure high-strength grouting material into the grouting hard pipe 127 and each grouting soft pipe 128 connected therewith, when the grouting material flows out of the upper end of each grouting soft pipe 128, the high-pressure grouting pump is stopped, the upper end of each grouting soft pipe 128 is closed, and the high-pressure grouting pump is restored to continue grouting the grouting pipe 126, the grouting material in the grouting soft pipe 128 breaks and flows out under the impact of high pressure to fill the lowermost intermediate layer horizontal partition plate 112 and the junction of the pipe wall of the twisted waist-shaped steel pipe 2 and the vertical partition plate 110, and the grouting is stopped. The grouting soft pipe 128 can be closed by rope binding or other methods. That is, the grouting pipe 126 is used to replace the technical scheme of step S7 in Embodiment 1, that is, the grouting pipe 126 is used to replace the second endoscope grouting pipe 111 to observe whether there is a cavity at the junction of the intermediate layer horizontal partition plate 112 and the vertical partition plate 110, and when there is a cavity, the high-pressure grouting pump is connected through the second endoscope grouting pipe 111 to perform supplementary grouting on the cavity to ensure the concrete pouring compactness at the junction of the intermediate layer horizontal partition plate 112 and the vertical partition plate 110. In short, the grouting pipe 126 is used to replace the second endoscope grouting pipe 111 to observe whether there is a cavity and subsequent processing steps.

[0103] The grouting method of the skew grid special-shaped cross steel pipe concrete structure provided by the embodiment of the application can guarantee that the concrete pouring compactness at the junction of the horizontal partition plate and the pipe wall of the twisted waist-shaped steel pipe 2 and the vertical partition plate 110 in the coverage range meets the requirements, and can avoid the problem of insufficient concrete pouring compactness. The concrete pouring compactness at the pipe wall of the twisted waist-shaped steel pipe 2, the lowermost intermediate layer horizontal partition plate 112 and the vertical partition plate 110 can also meet the requirements, and the problem of insufficient concrete pouring compactness can be avoided, thereby improving the concrete pouring quality of the twisted waist-shaped steel pipe 2 with the horizontal partition plate and the vertical partition plate.

[0104] In order to make the grout in the grouting hose 128 uniformly broken and filled in the gap at the layout path of the grouting hose 128 under the high pressure impact, to improve the concrete pouring density of the twisted waist-shaped steel pipe 2, the wall thickness of the grouting hose 128 from the downstream end to the upstream end is a gradual thickness structure from thin to thick, at this time the strength from the downstream end to the upstream end is a gradual change from weak to strong, the grout in the grouting hose 128 gradually expands from the downstream end to the downstream end under the high pressure impact, thereby comprehensively filling the gap at the layout path of the grouting hose 128, thereby improving the concrete pouring density of the twisted waist-shaped steel pipe 2 at the pipe wall, the lowest intermediate horizontal partition plate 112, the vertical partition plate 110 and the intersection of each layer of horizontal partition plate and the pipe wall, the vertical partition plate 110 of the twisted waist-shaped steel pipe 2 within the coverage range.

[0105] In order to avoid the collision interference of the grouting hose 128 and the air vent 116, the air vent 116 and the grouting hose 128 are staggered, as shown in Figure 23 Figure 23 and Figure 12 The dotted line where the air vent 116 in Figure 23 is located is the distribution shape line of the air vent 116, Figure 12 The distribution position of the air vent 116 in is adjusted along the distribution shape line, so that the grouting hose 128 and the air vent 116 are staggered, and the grouting density of the grouting hose 128 at the intersection of the vertical partition plate 110 and the pipe wall and the pipe wall is ensured.

[0106]

[0106] The present application is not limited to the above specific embodiments, and it is obvious that the above-described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application. Those skilled in the art can make other levels of modifications and changes to the present application. Therefore, if these modifications and changes of the present application belong to the scope of the claims of the present application, the present application also intends to include these modifications and changes.

Claims

1. A method for casting a diagonally intersecting grid of irregularly shaped intersecting steel pipe concrete structure, characterized in that, include: Step S1: Two first pre-embedded pump pipes with their openings facing downwards are symmetrically pre-embedded on the lower oblique steel pipe near the twisted waist-shaped steel pipe; two second pre-embedded pump pipes with their openings facing downwards are symmetrically pre-embedded on the two limb pipes between the bottom layer and the upper layer of the twisted waist-shaped steel pipe and the horizontal partition; a second endoscopic grouting pipe is pre-embedded in the two limb pipes of the twisted waist-shaped steel pipe, so that the second endoscopic grouting pipe is aligned at the junction of the upper surface of the horizontal partition and the vertical partition of each intermediate layer; Step S2: Connect the two first pre-embedded pump pipes to the three-way pumping pipe through the shut-off valve. Open the shut-off valve and use the jacking method to simultaneously pour concrete from bottom to top onto the lower oblique steel pipe by connecting the concrete pumping equipment to the three-way pumping pipe. Pour concrete up to the pre-reserved flow hole above the bottom horizontal partition of the twisted waist-shaped steel pipe. Stop pouring, close the shut-off valve, remove the three-way pumping pipe, and seal the first pouring hole. Step S3: After the concrete has initially set, use a long-handled tool to reach into the top opening of the twisted waist-shaped steel pipe to clean the laitance layer on the bottom horizontal partition. Then, flush with water to remove the laitance residue through the flow hole. Step S4: Insert the first endoscope grouting tube through the flow hole to observe whether there is a cavity at the junction of the bottom horizontal partition and the vertical partition inside the twisted waist-shaped steel pipe. If a cavity exists, connect the high-pressure grouting pump through the first endoscope grouting tube to supplement the cavity with grout. If no cavity exists, seal the flow hole. Step S5: Connect the two second pre-embedded pump pipes to the three-way pumping pipe through the shut-off valve, open the shut-off valve, and continue to pour concrete synchronously into the two limb pipes of the twisted waist-shaped steel pipe by using the jacking method through the concrete pumping equipment connected to the three-way pumping pipe to the pre-reserved flow hole above the top horizontal partition. Stop pouring, close the shut-off valve, remove the three-way pumping pipe, and seal the second pouring hole. Step S6: After the poured concrete has initially set, clean the laitance layer on the top horizontal partition using the method in step S3. Step S7: Insert the first endoscope grouting pipe through the pre-reserved flow hole above the top horizontal partition to observe whether there is a cavity at the junction of the top horizontal partition and the vertical partition inside the twisted waist-shaped steel pipe. If there is a cavity, connect the high-pressure grouting pump through the first endoscope grouting pipe to supplement the cavity with grout. If there is no cavity, seal the flow hole. Step S8: Insert the first endoscopic grouting pipe into the observation hole opened on the outer wall of the twisted waist-shaped steel pipe above each intermediate layer horizontal partition to observe whether there is a cavity at the junction of the intermediate layer horizontal partition and the pipe wall of the twisted waist-shaped steel pipe. If a cavity exists, supplement grouting is performed on the cavity through the first endoscopic grouting pipe; if no cavity exists, the observation hole is blocked. Then, observe whether there is a cavity at the junction of the intermediate layer horizontal partition and the vertical partition through the pre-embedded second endoscopic grouting pipe. If a cavity exists, supplement grouting is performed on the cavity through the second endoscopic grouting pipe; if no cavity exists, supplement grouting is not performed.

2. The method for casting a diagonally intersecting grid irregularly shaped steel pipe concrete structure according to claim 1, characterized in that, Also includes: Step S9: Install upper oblique steel pipes above the two limbs of the twisted waist-shaped steel pipe, insert the tee pumping pipe into the upper oblique steel pipe and connect it to the concrete pumping equipment, start the concrete pumping equipment and pour concrete into the two upper oblique steel pipes simultaneously using the high-throw method.

3. The method for casting a diagonally intersecting grid irregularly shaped steel pipe concrete structure according to claim 1, characterized in that, Step S3 also includes using a first endoscopic grouting tube to extend from the flow hole into the twisted waist-shaped steel pipe to observe whether the laitance layer is clean; if it is not clean, repeat step S3; if it is clean, proceed to step S4.

4. The method for casting a diagonally intersecting grid irregularly shaped steel pipe concrete structure according to claim 1, characterized in that, Before pouring concrete into the twisted waist-shaped steel tube, several ventilation holes are made around the central hole of each layer of horizontal partition.

5. The method for casting a diagonally intersecting grid irregularly shaped steel pipe concrete structure according to claim 4, characterized in that, The vertical partition has drainage holes.

6. The method for casting a diagonally intersecting grid irregularly shaped steel pipe concrete structure according to claim 1, characterized in that, The first and second endoscopic grouting tubes have the same structure, both including a double-layered tube with a cavity and a camera at its top. The cavity of the double-layered tube is a grouting channel, and the outer tube of the double-layered tube near the camera is provided with a grout outlet that is connected to the grouting channel.

7. The method for casting a diagonally intersecting grid irregularly shaped steel pipe concrete structure according to claim 1, characterized in that, In steps S4, S7 and S8, an endoscope without grouting function is used to replace the grouting tube of the first endoscope to observe whether there is a cavity. If there is a cavity, the endoscope without grouting function is pulled out and the grouting tube is inserted to supplement the grouting of the cavity.

8. The method for casting a diagonally intersecting grid irregularly shaped steel pipe concrete structure according to claim 1, characterized in that, Also includes: A grouting fitting is used instead of the second endoscope grouting tube. The grouting fitting includes a grouting rigid tube vertically installed in each limb pipe of the twisted waist-shaped steel pipe, and multiple grouting flexible tubes radially distributed below each grouting rigid tube. Each grouting flexible tube is attached to the lowest middle layer horizontal partition and extends to the inner wall of each limb pipe, and extends upward through the inner wall of each limb pipe to the top of the top horizontal partition. Supplementary grouting is performed using grouting pipe fittings. The rigid grouting pipe of the grouting pipe fittings is connected to a high-pressure grouting pump. The high-pressure grouting pump is started to inject high-pressure, high-strength grout into the rigid grouting pipe and each of the connected grouting hoses. When grout flows out from the upper end of each grouting hose, the high-pressure grouting pump is stopped, and the upper end of each grouting hose is sealed. The high-pressure grouting pump is then restarted to continue grouting the grouting pipe fittings. The grout in the grouting hoses will then rupture under high pressure and flow out to fill the junction of the lowest intermediate layer horizontal partition and the pipe wall and vertical partition of the twisted waist-shaped steel pipe. Grouting is then stopped.

9. The method for casting a diagonally intersecting grid irregularly shaped steel pipe concrete structure according to claim 1, characterized in that, In step S1, two third pre-embedded pump pipes with their openings facing upwards are symmetrically pre-embedded in the lower oblique steel pipe through the first casting hole. The third pre-embedded pump pipes pass through the central through hole of the bottom horizontal partition in the two limb pipes of the twisted waist-shaped steel pipe and are located above the bottom horizontal partition, in place of the first pre-embedded pump pipe.

10. The method for casting a diagonally intersecting grid irregularly shaped steel pipe concrete structure according to claim 9, characterized in that, In step S5, two fourth pre-embedded pump pipes are symmetrically pre-embedded in the two limb pipes of the twisted waist-shaped steel pipe through the second casting hole, so that the vertical conveying pump pipe passes through the central through hole of the top horizontal partition and is located above the top horizontal partition, in place of the second pre-embedded pump pipe.

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