An assembled concrete foundation structure

Abstract

The present invention discloses an assembled concrete foundation structure, comprising a precast concrete base plate and a concrete cushion layer, wherein the precast concrete base plate is assembled side by side on the top of the concrete cushion layer; the upper surface of the concrete cushion layer is divided into a plurality of rectangular areas according to the range covered by the precast concrete base plate, each rectangular area comprises three rectangular leveling areas located at both ends and in the middle and two rectangular grouting areas sandwiched between the rectangular leveling areas; there are fine-leveling strips on the rectangular leveling areas, a first dividing strip is fixed on the periphery of the rectangular grouting area, a plurality of second dividing strips are fixed in the rectangular grouting area, and the rectangular grouting area is divided into a labyrinth grouting channel by the second dividing strips; grouting holes and grouting outlet holes are respectively arranged at both ends of the first dividing strip located outside the rectangular grouting area, and the grouting holes and grouting outlet holes are respectively connected to the labyrinth grouting channel. The grouting areas are divided by hollow rubber strips, and the flatness is controlled by the fine-leveling strips, so as to effectively improve the quality of subsequent grouting.

Description

Technical Field

[0001] The invention belongs to the technical field of assembled subway station floor construction, and in particular relates to an assembled concrete foundation structure. Background Art

[0002] Grouting technology is widely used in the fields of construction, bridges, underground engineering, etc. Its main function is to seal and reinforce. For the gap sealing construction of large components, due to the large range of the grouting area and the hidden and difficult to observe, the grouting area is often not dense, which affects the integrity and stability of the structure. Summary of the invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides a prefabricated concrete foundation structure. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0004] A prefabricated concrete foundation structure comprises a precast concrete base plate and a concrete cushion layer, wherein the precast concrete base plates are assembled side by side above the concrete cushion layer; the upper surface of the concrete cushion layer is divided into a plurality of rectangular areas according to the range covered by the precast concrete base plate, each rectangular area comprises three rectangular leveling areas located at two ends and in the middle and two rectangular grouting areas sandwiched between the rectangular leveling areas; a fine leveling strip is arranged on the rectangular leveling area, a first dividing strip is fixed on the periphery of the rectangular grouting area, a plurality of second dividing strips are fixed in the rectangular grouting area, and the rectangular grouting area is divided into a labyrinth grouting channel by the second dividing strips; grouting holes and grouting outlet holes are respectively arranged at the two ends of the first dividing strip located outside the rectangular grouting area, and the grouting holes and grouting outlet holes are respectively connected to the labyrinth grouting channel, slurry is injected into the labyrinth grouting channel through the grouting holes, and the precast concrete base plate and the concrete cushion layer are fixed as a whole.

[0005] Furthermore, the cross-sections of the precast concrete base plate and the concrete cushion layer are circular arc structures that fit each other, the rectangular area includes horizontal areas at both ends and an arc area between the horizontal areas, the three rectangular leveling areas are respectively arranged on the outside of the horizontal area and in the middle of the arc area, the rectangular grouting area includes a first rectangular grouting area and a second rectangular grouting area, the first rectangular grouting area is arranged inside the horizontal area, and the second rectangular grouting area is arranged in the arc area.

[0006] Furthermore, the second dividing strips are arranged transversely, and both ends of two adjacent second dividing strips are alternately connected to the first dividing strips, so that the grouting channel is approximately "Z"-shaped.

[0007] Furthermore, the first separator strip and the second separator strip are both hollow rubber strips.

[0008] Beneficial effects of the present invention:

[0009] 1. The grouting area between the precast concrete bottom plate and the concrete cushion layer of the present invention is divided into four grouting areas by hollow rubber strips, and each grouting area is divided into a Z-shaped channel by a plurality of hollow rubber strips. The grouting holes and the grouting holes are monitored by pressure gauges and transparent observation tubes, which can effectively ensure the smooth progress of the grouting process and the quality of the grouting;

[0010] 2. The concrete foundation structure is simple, and the flatness of the grouting is controlled by fine-leveling strips, which facilitates the construction of the subsequent prefabricated concrete base plate.

[0011] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the top view structure of the present invention;

[0014] Figure 3 It is a side structural schematic diagram of the present invention.

[0015] Description of reference numerals:

[0016] 1- precast concrete base plate; 2- concrete cushion layer; 3- fine leveling strip; 4- first dividing strip; 5- second dividing strip; 6- grouting hole; 7- grouting hole. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0018] See also Figure 1 to Figure 3The embodiment of the present invention provides an assembled concrete foundation structure, including a precast concrete base plate 1 and a concrete cushion layer 2, wherein the precast concrete base plates 1 are assembled side by side on top of the concrete cushion layer 2; the upper surface of the concrete cushion layer 2 is divided into a plurality of rectangular areas according to the range covered by the precast concrete base plate 1, and each rectangular area includes three rectangular leveling areas located at both ends and in the middle and two rectangular grouting areas sandwiched between the rectangular leveling areas; a fine leveling strip 3 is provided on the rectangular leveling area, and the surface flatness of the precast concrete base plate 1 is controlled by controlling the surface flatness of the fine leveling strip 3 degree; the fine-leveling strip 3 is a cast concrete thin plate; a first dividing strip 4 is fixed on the periphery of the rectangular grouting area, and a plurality of second dividing strips 5 are fixed in the rectangular grouting area, and the rectangular grouting area is divided into a labyrinth grouting channel by the second dividing strips 5; grouting holes 6 and grouting holes 7 are respectively arranged at both ends of the first dividing strip 4 located on the right side of any one of the rectangular grouting areas, and the grouting holes 6 and grouting holes 7 are respectively connected to the corresponding labyrinth grouting channels, and the grouting holes 6 inject slurry into the labyrinth grouting channel to fix the precast concrete base plate 1 and the concrete cushion layer 2 as a whole.

[0019] Furthermore, the cross-sections of the precast concrete base plate 1 and the concrete cushion layer 2 are circular arc structures that fit each other, and this structure can make the concrete foundation structure bear better force. The rectangular area includes horizontal areas at both ends and an arc area between the horizontal areas. The three rectangular leveling areas are respectively arranged on the outside of the horizontal area and in the middle of the arc area. The rectangular grouting area includes a first rectangular grouting area and a second rectangular grouting area. There are two first rectangular grouting areas, which are respectively arranged on the inner sides of the two horizontal areas. There are also two second rectangular grouting areas, which are both arranged in the arc area and respectively arranged between the first grouting area and the rectangular leveling area in the middle of the arc area. The two first grouting areas and the two second grouting areas are both provided with grouting holes 6 and grouting holes 7.

[0020] Specifically, the positions of the grouting holes 6 and the slurry outlet holes 7 of the two rectangular grouting areas inside the horizontal area can be arbitrarily swapped, and the grouting holes 6 of the two second rectangular grouting areas in the arc-shaped area are located at the inner end of the arc-shaped area, while the slurry outlet holes 7 are located at the outer end of the arc-shaped area, so that the grouting liquid can fill the second grouting area densely under the action of resistance when flowing.

[0021] Preferably, the second dividing strips 5 are arranged horizontally, and the two ends of two adjacent second dividing strips 5 are alternately connected to the first dividing strips 4, so that the grouting channel is approximately "Z"-shaped. The "Z"-shaped grouting channel is composed of a plurality of adjacent two connected channels. When the slurry enters the grouting area along the grouting hole 6, it flows along the grouting channel in the grouting area. The slurry in each channel will enter another channel under the action of pressure only after it is densely filled, thereby ensuring that the grouting in the grouting area is dense, so that the precast concrete base plate 1 is evenly stressed, and the precast concrete base plate 1 is prevented from being subjected to stress concentration due to uneven local stress, thereby causing local crushing.

[0022] Preferably, the first dividing strip 4 and the second dividing strip 5 are both hollow rubber strips and are bonded to the concrete cushion layer 1. The hollow rubber strips are light in weight, easy to cut and convenient to transport.

[0023] Furthermore, the height of the fine-leveling strip 3 is 50 mm, the height of the first dividing strip 4 and the second dividing strip 5 is 60 mm, and the height of the first dividing strip 4 and the second dividing strip 5 is greater than the height of the fine-leveling strip 3, thereby ensuring that the grouting area formed between the precast concrete base plate 1 and the concrete cushion layer 2 is a closed space.

[0024] The grouting process of the prefabricated concrete foundation structure is as follows:

[0025] First, fine-leveling strips 3 are respectively set at the two ends and the middle of the concrete cushion layer 2 in the area to be grouting, and then the concrete cushion layer 2 in the area is divided into four grouting areas by hollow rubber strips, and each grouting area is divided into an approximately "Z"-shaped channel by the hollow rubber strips; then the precast concrete base plate 1 is installed; after the installation is completed, grouting is started for each grouting area through the corresponding grouting hole 6, and the changes in the pressure gauge set on the grouting pipe are observed. If the pressure display is stable, it means that the grouting state is good; at the same time, the transparent observation tube of the slurry outlet hole 7 is observed. If slurry flows out of the slurry outlet hole 7, it means that the slurry has been densely filled in the grouting area, and the grouting of the cabin is completed.

[0026] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An assembled concrete foundation structure, characterized in that: It comprises a precast concrete base plate and a concrete cushion layer, wherein the precast concrete base plates are assembled side by side on top of the concrete cushion layer; the upper surface of the concrete cushion layer is divided into a plurality of rectangular areas according to the range covered by the precast concrete base plates, and each rectangular area comprises three rectangular leveling areas at both ends and in the middle and two rectangular grouting areas sandwiched between the rectangular leveling areas; a fine leveling strip is provided on the rectangular leveling area, a first dividing strip is fixed on the periphery of the rectangular grouting area, and a plurality of second dividing strips are fixed in the rectangular grouting area, and the second dividing strips are arranged transversely and mutually The two ends of the adjacent second dividing strips are alternately connected to the first dividing strips, so that the grouting channel is approximately "Z"-shaped; the rectangular grouting area is divided into a labyrinth grouting channel by the second dividing strips; grouting holes and slurry discharge holes are respectively provided at both ends of the first dividing strip located outside the rectangular grouting area, and the grouting holes and slurry discharge holes are respectively connected to the labyrinth grouting channel, and slurry is injected into the labyrinth grouting channel through the grouting holes to fix the precast concrete base plate and the concrete cushion layer into a whole; pressure gauges and transparent observation tubes are provided on the grouting holes and the slurry discharge holes.

2. The assembled concrete foundation structure according to claim 1, characterized in that: The cross-sections of the precast concrete base plate and the concrete cushion layer are circular arc structures that adapt to each other. The rectangular area includes horizontal areas at both ends and an arc area between the horizontal areas. The three rectangular leveling areas are respectively arranged on the outside of the horizontal area and in the middle of the arc area. The rectangular grouting area includes a first rectangular grouting area and a second rectangular grouting area. The first rectangular grouting area is arranged inside the horizontal area, and the second rectangular grouting area is arranged in the arc area.

3. The assembled concrete foundation structure according to claim 2, characterized in that: The first and second partition strips are both hollow rubber strips.

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