Forward and reverse combined construction earthwork underground excavation and transportation method for reinforced concrete frame structure

Abstract

The invention relates to the technical field of earthwork subsurface excavation and transportation, in particular to a reinforced concrete frame structure forward and reverse construction combined earthwork subsurface excavation and transportation method which comprises the steps of field leveling, hard terrace construction, underground diaphragm wall construction, cast-in-place pile hole forming, supporting column placing, fender post construction, waterproof curtain construction and temporary stand column construction. Then the piles are poured to the designed elevation; the construction method has the beneficial effects that the construction efficiency can be effectively improved, the construction period can be effectively shortened, the engineering cost can be effectively reduced, the construction safety and the quality stability can be ensured, meanwhile, the influence on the surrounding environment can be effectively reduced, and the construction period is shortened. And the social benefit and the environmental protection benefit of engineering are improved.

Description

Technical Field

[0001] The invention relates to the technical field of earthwork dark excavation and transportation, and in particular to a method for dark excavation and transportation of earthwork in a reinforced concrete frame structure in combination with forward and reverse operations. Background Art

[0002] Deep foundation pit engineering is a major challenge in the process of urbanization. The complex and changeable engineering geological and hydrogeological conditions bring many uncertainties to the construction of deep foundation pit engineering. For example, factors such as the bearing capacity of the soil, the height of the groundwater level, and the properties of rock and soil will affect the stability of the foundation pit. In addition, with the improvement of environmental protection awareness, the impact of foundation pit construction on the surrounding environment has also attracted much attention. In addition, the restrictions of development conditions such as construction schedule and resource conservation also make foundation pit engineering face greater challenges.

[0003] Considering all the above factors, underground structures are generally constructed in reverse construction, but reverse construction makes it difficult to transport earthwork. Since the earthwork is excavated secretly, the earthwork transportation route is long and needs to pass through vertical or inclined channels to reach the ground, which will have a certain impact on the transportation and excavation efficiency of the earthwork. At the same time, earthwork excavation and transportation have high safety risks. Since excavation and transportation need to be carried out under the completed floor during construction, special attention should be paid to safety issues to prevent safety accidents such as floor collapse or earthwork landslides, resulting in relatively high construction costs. Summary of the invention

[0004] The purpose of the present invention is to provide a method for underground excavation and transportation of earthwork in a reinforced concrete frame structure combined with forward and reverse construction, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a method for underground excavation and transportation of reinforced concrete frame structure combined with forward and reverse construction, comprising:

[0006] Step 1: Level the site, construct the hard floor, carry out underground continuous wall construction, then drill holes for cast-in-place piles, place support columns, construct retaining piles, water-stop curtains and temporary columns, and then cast piles to the designed elevation;

[0007] Step 2: Prepare for the first step of earthwork excavation, reduce water levels before excavation, and after excavation to the target elevation and vertical retaining structure construction is completed, construct the B0-layer beam and slab in the reverse area, and construct the first support, purlin, and trestle in the forward area;

[0008] Step 3: After the beams and slabs of the B0 layer in the reverse construction area and the first support and purlins in the forward construction area reach the design strength, the second layer of soil is excavated to the design elevation after precipitation, and then the beams and slabs of the B1 layer in the reverse construction area are constructed by pouring a concrete cushion layer (basin-type excavation), and the second support and purlins in the forward construction area are constructed. At the same time, the upper structure of the reverse construction area is constructed upwards;

[0009] Step 4: After the beams and slabs of the B1 layer in the reverse construction area and the second support and purlins in the forward construction area reach the designed strength, the third layer of soil is excavated (the first underground layer and the ramp on the west side are not excavated for the time being), the bottom plate is constructed in sections, and the upper structure is constructed upwards in the reverse construction area at the same time;

[0010] Step 5: After the bottom plate strength reaches the designed strength, the underground structure of the forward working area is constructed and the supports are removed and replaced. The underground structure of the middle hole area is constructed upwards in sequence. At the same time, the upper structure of the reverse working area is constructed upwards, and the earthwork excavation of the first underground floor area on the west side is carried out;

[0011] Step 6: Complete the overall structural construction of the underground first and second floors, excavate the ramp and carry out ramp construction.

[0012] Preferably, a pile tip is provided at the bottom of the immersed tube outside the cast-in-place pile, an extension frame is fixed to the surface of the immersed tube, a through groove is provided on the surface of the immersed tube, a plug-in groove is provided on the surface of the extension frame, a groove is provided on the surface of the plug-in groove, a first slide groove and a second slide groove are provided on the surface of the extension frame, the second slide groove is inclined, and sliders are provided in the first slide groove and the second slide groove.

[0013] Preferably, the slider can move in the first slide groove and the second slide groove, the two groups of sliders are connected to each other, the surface of the slider is provided with a connecting rod, the end of the connecting rod is connected to a cross bar, and the surface of the cross bar is connected to the first lifting rope.

[0014] Preferably, a second lifting rope is provided at the bottom of the immersed tube, and multiple groups of second lifting ropes are provided. The ends of the multiple groups of second lifting ropes are connected to connecting columns, and a lifting column is inserted at the top of the connecting column. A second lifting ring is provided on the surface of the lifting column.

[0015] Preferably, a lifting groove is provided on the surface of the connecting column, a lifting plate is provided in the lifting groove, the lifting plate can be lifted and lowered inside the lifting groove, the end of the lifting plate is connected to the end of the lifting column, and the lifting plate is lifted and lowered along with the lifting column.

[0016] Preferably, the end of the first lifting rope is connected to the surface of the lifting plate, and the surface of the connecting column is provided with a first lifting ring.

[0017] Preferably, a reinforcing block is provided at the end of the extension frame, a plug-in board is fixed to the end of the reinforcing block, both sides of the plug-in board are plugged into the plug-in slots on the surface of the extension frame, and a protrusion is provided on the surface of the plug-in board, which is stuck in the groove on the surface of the plug-in slot.

[0018] Preferably, a telescopic block is plugged into the surface of the plug board, and the telescopic block can be telescoped inside the plug board. A spring is provided inside the plug board, and one end of the spring is connected to the end of the telescopic block. The spring has a thrust on the telescopic block, so that the telescopic block is located outside the plug board, and a slot is provided on the surface of the telescopic block.

[0019] Preferably, a reinforcing rod is placed inside the immersed tube, and both ends of the reinforcing rod are located in the grooves on the surface of the telescopic block.

[0020] Preferably, the pile tip is inserted into the bottom of the immersed tube, and concrete is poured inside the immersed tube.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention proposes a method of excavating earth by combining forward and reverse construction and reserved openings with trestles, which can effectively improve construction efficiency, shorten construction period, reduce project costs, and ensure construction safety and stable quality. At the same time, the method can also effectively reduce the impact on the surrounding environment and improve the social and environmental benefits of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the reinforcing block structure of the present invention.

[0025] Figure 3 It is a schematic diagram of the immersed tube structure of the present invention.

[0026] Figure 4 It is a schematic diagram of the partially enlarged structure of the immersed tube of the present invention.

[0027] Figure 5 for Figure 3 A schematic diagram of the enlarged structure in the middle.

[0028] Figure 6 It is a schematic diagram of the connecting column structure of the present invention.

[0029] In the figure: immersed tube 1, reinforcement rod 2, reinforcement block 3, pile tip 4, protrusion 5, telescopic block 6, slot 7, plug-in plate 8, first lifting rope 9, second lifting rope 10, extension frame 11, cross bar 12, connecting rod 13, first slide groove 14, slider 15, second slide groove 16, through groove 17, plug-in groove 18, groove 19, lifting plate 20, lifting groove 21, first lifting ring 22, second lifting ring 23, lifting column 24, connecting column 25. DETAILED DESCRIPTION

[0030] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 6 , the present invention provides a technical solution:

[0032] Embodiment 1: A pile tip 4 is arranged at the bottom of the sinking tube 1 outside the cast-in-place pile, an extension frame 11 is fixed to the surface of the sinking tube 1, a through groove 17 is provided on the surface of the sinking tube 1, a plug-in groove 18 is provided on the surface of the extension frame 11, a groove 19 is provided on the surface of the plug-in groove 18, a first slide groove 14 and a second slide groove 16 are provided on the surface of the extension frame 11, the second slide groove 16 is inclined, and a slider 15 is provided in each of the first slide groove 14 and the second slide groove 16, the slider 15 can move in the first slide groove 14 and the second slide groove 16, the two groups of sliders 15 are connected to each other, a connecting rod 13 is provided on the surface of the slider 15, the end of the connecting rod 13 is connected to the cross bar 12, and the surface of the cross bar 12 is connected to the There is a first lifting rope 9, and a second lifting rope 10 is arranged at the bottom of the immersed tube 1. The second lifting rope 10 is arranged in multiple groups. The ends of the multiple groups of second lifting ropes 10 are connected with connecting columns 25. The top of the connecting column 25 is plugged with a lifting column 24. The surface of the lifting column 24 is provided with a second lifting ring 23. The second lifting ring 23 drives the lifting column 24 to rise, and the lifting column 24 drives the lifting plate 20 to rise in the lifting groove 21. The lifting plate 20 pulls up the first lifting rope 9, so that the cross bar 12 drives the slider 15 to rise in the second slide groove 16 through the connecting rod 13. Since the second slide groove 16 is inclined, another group of sliders 15 rise in the first slide groove 14, so that the distance of the plug-in groove 18 increases.

[0033] Embodiment 2: On the basis of embodiment 1, a lifting groove 21 is provided on the surface of the connecting column 25, and a lifting plate 20 is provided in the lifting groove 21. The lifting plate 20 can be lifted and lowered inside the lifting groove 21. The end of the lifting plate 20 is connected to the end of the lifting column 24. The lifting plate 20 is lifted and lowered along with the lifting column 24. The end of the first lifting rope 9 is connected to the surface of the lifting plate 20. The surface of the connecting column 25 is provided with a first lifting ring 22. A reinforcing block 3 is provided at the end of the extension frame 11. A plug-in plate 8 is fixed at the end of the reinforcing block 3. Both sides of the plug-in plate 8 are plugged into the plug-in groove 18 on the surface of the extension frame 11. The surface of the plug-in plate 8 is provided with a protrusion 5. The protrusion 5 is stuck in the groove 19 on the surface of the plug-in groove 18. The surface of the plug-in plate 8 A telescopic block 6 is plugged in, and the telescopic block 6 can be telescoped inside the plug-in board 8. A spring is arranged inside the plug-in board 8, and one end of the spring is connected to the end of the telescopic block 6. The spring has a thrust on the telescopic block 6, so that the telescopic block 6 is located outside the plug-in board 8. A card slot 7 is provided on the surface of the telescopic block 6. A reinforcing rod 2 is placed inside the immersed tube 1, and both ends of the reinforcing rod 2 are located in the card slot 7 on the surface of the telescopic block 6. The pile tip 4 is plugged in the bottom of the immersed tube 1, and the interior of the immersed tube 1 is poured with concrete. The reinforcing rod 2 is put into the interior of the immersed tube 1, and the end of the reinforcing rod 2 is stuck in the card slot 7. The immersed tube 1 is lifted on the surface of the first lifting ring 22, and the immersed tube 1 is lowered into the pouring hole. Due to the support of the reinforcing block 3 and the reinforcing rod 2, the immersed tube 1 will not be deformed.

[0034] Insert the plug-in board 8 into the plug-in slot 18 on the surface of the extension frame 11, and the protrusion 5 on the surface of the plug-in board 8 is stuck in the groove 19 on the surface of the plug-in slot 18, so that the reinforcement block 3 is stabilized at the end of the extension frame 11, and the telescopic block 6 is inserted into the inside of the through slot 17, and the reinforcement rod 2 is placed in the inside of the immersed tube 1, and the end of the reinforcement rod 2 is stuck in the card slot 7. The immersed tube 1 is lifted on the surface of the first lifting ring 22, and the immersed tube 1 is lowered into the pouring hole. Due to the support of the reinforcement block 3 and the reinforcement rod 2, the immersed tube 1 will not be deformed. The reinforcement rod 2 and the reinforcement block 3 play a supporting role. When pulling up the immersed tube 1, the lifting equipment is connected to the second lifting ring 23. On the surface, the second lifting ring 23 drives the lifting column 24 to rise, and the lifting column 24 drives the lifting plate 20 to rise in the lifting groove 21. The lifting plate 20 pulls up the first lifting rope 9, so that the cross bar 12 drives the slider 15 to rise in the second slide groove 16 through the connecting rod 13. Since the second slide groove 16 is inclined, another group of sliders 15 rise in the first slide groove 14, so that the distance of the plug-in groove 18 increases. When the extension frame 11 rises with the immersed tube 1, the reinforcement rod 2 is located inside the concrete and prevents the reinforcement block 3 from being stuck inside the casting groove. The plug-in plate 8 is detached from the plug-in groove 18, so that the reinforcement block 3 is detached from the end of the extension frame 11.

[0035] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A method for underground excavation and transportation of reinforced concrete frame structure combined with forward and reverse construction, characterized in that: include: Step 1: Level the site, construct the hard floor, carry out underground continuous wall construction, then drill holes for cast-in-place piles, place support columns, construct retaining piles, water-stop curtains and temporary columns, and then cast piles to the designed elevation; Step 2: Prepare for the first step of earthwork excavation, reduce water levels before excavation, and after excavation to the target elevation and vertical retaining structure construction is completed, construct the B0-layer beam and slab in the reverse area, and construct the first support, purlin, and trestle in the forward area; Step 3: After the beams and slabs of the B0 layer in the reverse construction area and the first support and purlins in the forward construction area reach the design strength, the second layer of soil is excavated to the design elevation after precipitation, and then the beams and slabs of the B1 layer in the reverse construction area are constructed by pouring a concrete cushion layer (basin-type excavation), and the second support and purlins in the forward construction area are constructed. At the same time, the upper structure of the reverse construction area is constructed upwards; Step 4: After the beams and slabs of the B1 layer in the reverse construction area and the second support and purlins in the forward construction area reach the designed strength, the third layer of soil is excavated (the first underground layer and the ramp on the west side are not excavated for the time being), the bottom plate is constructed in sections, and the upper structure is constructed upwards in the reverse construction area at the same time; Step 5: After the bottom plate strength reaches the designed strength, the underground structure of the forward working area is constructed and the supports are removed and replaced. The underground structure of the middle hole area is constructed upwards in sequence. At the same time, the upper structure of the reverse working area is constructed upwards, and the earthwork excavation of the first underground floor area on the west side is carried out; Step 6: Complete the overall structural construction of the underground first and second floors, excavate the ramp and carry out ramp construction.

2. A method for underground excavation and transportation of reinforced concrete frame structure combined with forward and reverse construction according to claim 1, characterized in that: A pile tip (4) is arranged at the bottom of the sinking tube (1) outside the cast-in-place pile, an extension frame (11) is fixed on the surface of the sinking tube (1), a through groove (17) is provided on the surface of the sinking tube (1), a plug-in groove (18) is provided on the surface of the extension frame (11), a groove (19) is provided on the surface of the plug-in groove (18), a first slide groove (14) and a second slide groove (16) are provided on the surface of the extension frame (11), the second slide groove (16) is inclined, and sliders (15) are provided in the first slide groove (14) and the second slide groove (16).

3. A method for earthwork concealed excavation and transportation for combined forward and reverse construction of reinforced concrete frame structure according to claim 2, characterized in that: The slider (15) can move in the first slide groove (14) and the second slide groove (16), the two groups of sliders (15) are connected to each other, the surface of the slider (15) is provided with a connecting rod (13), the end of the connecting rod (13) is connected to a cross bar (12), and the surface of the cross bar (12) is connected to a first lifting rope (9).

4. A method for underground excavation and transportation of reinforced concrete frame structure combined with forward and reverse construction according to claim 3, characterized in that: A second lifting rope (10) is arranged at the bottom of the immersed tube (1), and a plurality of second lifting ropes (10) are arranged. The ends of the plurality of second lifting ropes (10) are connected to connecting columns (25), and a lifting column (24) is inserted at the top of the connecting column (25), and a second lifting ring (23) is arranged on the surface of the lifting column (24).

5. A method for underground excavation and transportation of reinforced concrete frame structure combined with forward and reverse construction according to claim 4, characterized in that: A lifting groove (21) is provided on the surface of the connecting column (25), and a lifting plate (20) is arranged in the lifting groove (21). The lifting plate (20) can be lifted and lowered inside the lifting groove (21), and the end of the lifting plate (20) is connected to the end of the lifting column (24), and the lifting plate (20) is lifted and lowered along with the lifting column (24).

6. A method for earthwork concealed excavation and transportation for combined forward and reverse construction of reinforced concrete frame structure according to claim 5, characterized in that: The end of the first lifting rope (9) is connected to the surface of the lifting plate (20), and the surface of the connecting column (25) is provided with a first lifting ring (22).

7. A method for underground excavation and transportation of reinforced concrete frame structure combined with forward and reverse construction according to claim 6, characterized in that: The end of the extension frame (11) is provided with a reinforcement block (3), the end of the reinforcement block (3) is fixed with a plug-in board (8), both sides of the plug-in board (8) are plugged into plug-in slots (18) on the surface of the extension frame (11), and the surface of the plug-in board (8) is provided with a protrusion (5), which is stuck in a groove (19) on the surface of the plug-in slot (18).

8. The method for underground excavation and transportation of reinforced concrete frame structure combined with forward and reverse construction according to claim 7, characterized in that: A telescopic block (6) is plugged into the surface of the plug board (8), and the telescopic block (6) can be telescoped inside the plug board (8). A spring is arranged inside the plug board (8), and one end of the spring is connected to the end of the telescopic block (6). The spring has a thrust on the telescopic block (6), so that the telescopic block (6) is located outside the plug board (8). A card slot (7) is provided on the surface of the telescopic block (6).

9. A method for earthwork concealed excavation and transportation for combined forward and reverse construction of reinforced concrete frame structure according to claim 8, characterized in that: A reinforcing rod (2) is placed inside the immersed tube (1), and both ends of the reinforcing rod (2) are located in the clamping grooves (7) on the surface of the telescopic block (6).

10. A method for underground excavation and transportation of reinforced concrete frame structure combined with forward and reverse construction according to claim 9, characterized in that: The pile tip (4) is inserted into the bottom of the immersed tube (1), and concrete is poured inside the immersed tube (1).

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