Foundation pit support construction technology

Abstract

The invention discloses a foundation pit support construction process which comprises the following steps: step 1, planning an area on the outer edge of a foundation pit on a construction site, and pouring a first concrete layer in the area; secondly, a steel reinforcement framework is arranged on the first concrete layer, two positioning sleeves are vertically fixed to the steel reinforcement framework, and a first positioning layer is poured on the steel reinforcement framework; thirdly, the two positioning sleeves serve as guide holes, drilling is conducted downwards, the two positioning piles are poured, and two fixing arms with the bottoms intersecting are formed; fourthly, a space is dug in the bottom of the foundation pit in the direction of the fixing arms, a fixing base is poured in the space, and the fixing base is connected with one fixing arm; and fifthly, soil is backfilled on the side, close to the foundation pit, of one fixing arm, the side wall of the foundation pit is obliquely arranged, a second concrete layer is poured on the backfilled soil, reinforcing steel bars are laid on the second concrete layer, and a second positioning layer is poured on the reinforcing steel bars. The supporting effect on the foundation pit is good, and the foundation pit is effectively prevented from collapsing.

Description

Technical Field

[0001] The present invention relates to the technical fields related to foundation pit construction, and in particular to a foundation pit enclosure construction process. Background Art

[0002] At present, the foundation pit is usually supported by setting supporting piles inside the foundation pit. Since the outer side of the supporting piles is under pressure from the soil outside the foundation pit, the soil at the fulcrum is prone to collapse inward, which in turn causes the supporting piles and the side walls of the foundation pit to collapse. Therefore, the traditional cantilever beam support structure has poor stability. Inadequate support may cause settlement and tilting of buildings around the foundation pit, and pit collapse caused by rising groundwater, and other safety hazards. Summary of the invention

[0003] In view of this, in order to solve the above problems, the object of the present invention is to provide a foundation pit retaining construction process, which includes:

[0004] Step 1: Plan an area at the outer edge of the foundation pit at the construction site and pour a first concrete layer in the area;

[0005] Step 2: Arrange a steel skeleton on the first concrete layer, vertically fix two positioning sleeves on the steel skeleton, and cast a first positioning layer on the steel skeleton;

[0006] Step 3: using the two positioning sleeves as guide holes, drilling downward and pouring two positioning piles to form two fixed arms intersecting at the bottom;

[0007] Step 4: digging a space at the bottom of the foundation pit in the direction of the fixed arm, casting a fixing seat in the space, wherein the fixing seat is connected to one of the fixed arms;

[0008] Step 5: backfill soil on one side of the fixed arm close to the foundation pit to tilt the side wall of the foundation pit, pour a second concrete layer on the backfill soil, lay steel bars on the second concrete layer, and pour a second positioning layer on the steel bars.

[0009] The above-mentioned foundation pit retaining construction process further includes: a waterproof layer; in the step four, the waterproof layer is poured on the fixed seat toward the bottom of the foundation pit.

[0010] In the above-mentioned foundation pit retaining construction process, the bottom of the waterproof layer is lower than the bottom of one of the fixed arms.

[0011] The above-mentioned foundation pit retaining construction process further includes: supporting piles; in the step four, after pouring the waterproof layer, drilling holes on the fixed seat, and pouring the supporting piles toward the bottom of the foundation pit.

[0012] The above-mentioned foundation pit retaining construction process further includes: a pumping device; drilling a hole downward at an end of the fixing seat away from the fixing arm, and pre-burying the pumping device.

[0013] The above-mentioned foundation pit retaining construction process, wherein the pumping device includes: a pumping pipe and a pumping pump; a plurality of pumping holes are provided at the bottom of the pumping pipe, and the pumping pump is connected to the bottom of the pumping pipe through a water pipe.

[0014] The above-mentioned foundation pit retaining construction process further includes: a filtering device; the filtering device is installed at the bottom of the water pumping pipe, and the water pump is connected to the filtering device through the water pipe.

[0015] In the above-mentioned foundation pit retaining construction process, each of the fixed arms has a first support arm and a second support arm connected to each other, and there is a certain angle between the first support arm and the second support arm.

[0016] In the above-mentioned foundation pit retaining construction process, each of the positioning sleeves passes through the first positioning layer and the first concrete layer and extends into the sand in the area.

[0017] In the above-mentioned foundation pit retaining construction process, the fixing seat is connected to the connection point of the first support arm and the second support arm.

[0018] Compared with the prior art, the above technical solution has the following positive effects:

[0019] Through the application of the present invention, a foundation pit retaining construction process is provided, in which the bottom and side walls of the foundation pit are supported by arranging fixed arms and fixed seats, and a waterproof layer is arranged to prevent water from entering the fixed arms and affecting the supporting effect, and a pumping device is arranged to pump out the water at the bottom of the foundation pit, thereby effectively preventing the foundation pit from collapsing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a foundation pit retaining construction process of the present invention.

[0021] 1. Foundation pit; 2. First concrete layer; 3. Steel bar skeleton; 4. Positioning sleeve; 5. First positioning layer; 6. Fixed arm; 7. Fixed seat; 8. Second concrete layer; 9. Steel bars; 10. Second positioning layer; 11. Second positioning layer; 12. Water-proof layer; 13. Support piles; 14. Pumping device; 15. Pumping pipe; 16. Pumping pump; 17. Filter device; 18. First support arm; 19. Second support arm. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations, but they are not intended to limit the present invention.

[0023] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0024] like Figure 1 As shown, a foundation pit enclosure construction process of a preferred embodiment is shown, which includes:

[0025] Step 1: Plan an area at the outer edge of the foundation pit 1 at the construction site and pour the first concrete layer 2 in the area;

[0026] Step 2: Arrange a steel skeleton 3 on the first concrete layer 2, vertically fix two positioning sleeves 4 on the steel skeleton 3, and cast a first positioning layer 5 on the steel skeleton 3;

[0027] Step 3: Using the two positioning sleeves 4 as guide holes, drill downward and cast two positioning piles to form two fixed arms 6 that intersect at the bottom;

[0028] Step 4: dig a space at the bottom of the foundation pit 1 in the direction of the fixed arm 6, cast a fixed seat 7 in the space, and the fixed seat 7 is connected to a fixed arm 6;

[0029] Step 5: Backfill soil on one side of a fixed arm 6 close to the foundation pit 1 to tilt the side wall of the foundation pit 1 , pour a second concrete layer 8 on the backfill soil, lay steel bars 9 on the second concrete layer 8 , and pour a second positioning layer 10 on the steel bars 9 .

[0030] In actual use, by providing two fixed arms 6 and a fixed seat 7, the side walls and the bottom of the foundation pit 1 can be effectively supported, and the collapse of the foundation pit can be effectively prevented. In addition, the construction method is simple and easy to use.

[0031] The present invention also has the following implementation modes based on the above:

[0032] Furthermore, a foundation pit enclosure construction process further includes: a waterproof layer 12; in step 4, the waterproof layer 12 is poured on the fixing seat 6 toward the bottom of the foundation pit 1. Specifically, by providing the waterproof layer 12, water in the foundation pit 1 can be effectively prevented from entering the fixing arm 6, thereby preventing the foundation pit 1 from collapsing.

[0033] Furthermore, a foundation pit retaining construction process is provided, wherein the bottom of the waterproof layer 12 is lower than the bottom of a fixed arm 6 .

[0034] Furthermore, a foundation pit retaining construction process further includes: support piles 13; in step 4, after pouring the waterproof layer 12, holes are drilled on the fixed seat 7, and the support piles 13 are poured toward the bottom of the foundation pit 1. Specifically, the fixed seat 7 can be supported by the support piles 13 and the waterproof layer 12, thereby improving the stability of the support seat.

[0035] Furthermore, a foundation pit enclosure construction process further includes: a pumping device; a hole is drilled downward at one end of the fixing seat 7 away from a fixing arm 6, and the pumping device is pre-buried. Specifically, the water at the bottom of the foundation pit 1 is pumped out by the pumping device to prevent the bottom of the foundation pit 1 from collapsing due to the influence of water.

[0036] Further, a foundation pit retaining construction process is provided, wherein the pumping device comprises: a pumping pipe 15 and a pumping pump 16; a plurality of pumping holes are provided at the bottom of the pumping pipe 15, and the pumping pump 16 is connected to the bottom of the pumping pipe 15 through a water pipe. Specifically, the water at the bottom of the foundation pit 1 is pumped out by the pumping pump 16.

[0037] Furthermore, a foundation pit retaining construction process further includes: a filter device 17; the filter device 17 is installed at the bottom of the water pump 15, and the water pump 16 is connected to the filter device 17 through the water pipe. Specifically, the filter device 17 can be a filter net, a filter, etc., to filter larger sand and gravel in the water.

[0038] Furthermore, a foundation pit retaining construction process is provided, wherein each fixed arm 6 has a first support arm 18 and a second support arm 19 connected to each other, and a certain angle is formed between the first support arm 18 and the second support arm 19.

[0039] Further, a foundation pit retaining construction process is provided, wherein each positioning sleeve 4 passes through the first positioning layer 5 and the first concrete layer 2 and extends into the sandy soil of the area. Specifically, the positioning sleeve 4 is fixed in the area of ​​the foundation pit outer aid, and then the fixing arm 6 is poured through the positioning sleeve 4.

[0040] Further, a foundation pit enclosure construction process is provided, wherein the fixing seat 7 is connected to the connection point of the first support arm 18 and the second support arm 19. Specifically, the bottom and side walls of the foundation pit 1 are supported by the fixing arm 6 and the fixing seat 7.

[0041] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A foundation pit protection construction process, characterized in that: include: Step 1: Plan an area at the outer edge of the foundation pit at the construction site and pour a first concrete layer in the area; Step 2: Arrange a steel skeleton on the first concrete layer, vertically fix two positioning sleeves on the steel skeleton, and cast a first positioning layer on the steel skeleton; Step 3: using the two positioning sleeves as guide holes, drilling downward and pouring two positioning piles to form two fixed arms intersecting at the bottom; Step 4: digging a space at the bottom of the foundation pit in the direction of the fixed arm, casting a fixing seat in the space, wherein the fixing seat is connected to one of the fixed arms; Step 5: backfill soil on one side of the fixed arm close to the foundation pit to tilt the side wall of the foundation pit, pour a second concrete layer on the backfill soil, lay steel bars on the second concrete layer, and pour a second positioning layer on the steel bars.

2. A foundation pit protection construction process according to claim 1, characterized in that: Also includes: Waterproof layer; In the step 4, a waterproof layer is poured on the fixing seat toward the bottom of the foundation pit.

3. A foundation pit protection construction process according to claim 2, characterized in that: The bottom of the waterproof layer is lower than the bottom of one of the fixed arms.

4. A foundation pit protection construction process according to claim 2, characterized in that: Also includes: Support piles; In the step 4, after pouring the waterproof layer, holes are drilled on the fixed seat, and the supporting piles are poured toward the bottom of the foundation pit.

5. A foundation pit protection construction process according to claim 1, characterized in that: Also includes: A pumping device; a hole is drilled downward at one end of the fixing seat away from the fixing arm, and the pumping device is pre-buried.

6. A foundation pit protection construction process according to claim 5, characterized in that: The water pumping device comprises: a water pumping pipe and a water pump; a plurality of water pumping holes are arranged at the bottom of the water pumping pipe, and the water pump is connected with the bottom of the water pumping pipe through a water pipe.

7. A foundation pit protection construction process according to claim 6, characterized in that: Also includes: Filter device; the filter device is installed at the bottom of the water pump, and the water pump is connected to the filter device through the water pipe.

8. A foundation pit protection construction process according to claim 1, characterized in that: Each of the fixed arms comprises a first arm and a second arm connected to each other, and a certain angle is formed between the first arm and the second arm.

9. A foundation pit protection construction process according to claim 1, characterized in that: Each of the positioning sleeves passes through the first positioning layer and the first concrete layer and extends into the sand in the area.

10. A foundation pit protection construction process according to claim 8, characterized in that: The fixing seat is connected to the connection point of the first supporting arm and the second supporting arm.

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