Foundation pit external pipeline protection structure

Abstract

The utility model relates to a foundation pit external pipeline protection structure. The method is used for protecting a pipeline outside a pit, the pipeline outside the pit is located on the outer side of a foundation pit supporting pile, and a pipeline position control groove is dug in a soil body outside the pit; comprising a supporting inclined pipe obliquely inserted into the bottom of a pipeline position control groove, and the periphery of the supporting inclined pipe is grouted to form a pipe periphery slurry solid; a supporting side plate and a pile side supporting pier are arranged on the outer side face of the foundation pit supporting pile, and a position correcting bolt is arranged between the supporting side plate and the pipeline outside the pit. Reinforcing supporting columns are arranged in the pipeline position control grooves in a driving mode, and suspension cross beams are arranged on the tops of the reinforcing supporting columns and the pile side supporting piers. A suspension pull rod is further arranged on the pipeline outside the pit, and the top end of the suspension pull rod penetrates through a hole reserved in the suspension cross beam. According to the utility model, the supporting inclined pipe and the slurry solid around the pipe are arranged, so that the bearing capacity of the soil outside the pit is improved. And by arranging the suspension pull rod, a vertical hoisting and pulling effect can be provided for the pipeline outside the pit. And by arranging the inclined position correcting bolts, inclined upward supporting force can be provided for the pipeline outside the pit, and the deformation control precision of the pipeline outside the pit is improved.

Description

Technical Field

[0001] The utility model relates to a foundation pit external pipeline protection structure, specifically a pipeline deformation control structure adjacent to the foundation pit support piles, which can reduce pipeline deformation and reduce the impact of foundation pit construction on the pipeline. It belongs to the field of foundation pit engineering and is suitable for foundation pit external pipeline protection projects in soft soil areas. Background Art

[0002] During the excavation of foundation pits, the protection of external pipelines is often encountered; the current pipeline protection technology usually corrects and controls the position of external pipelines based on on-site monitoring data, or uses position-control piles and pipe reinforcement to reinforce the pipeline. Although the above technical measures are helpful in controlling the deformation of pipelines, there is still room for further improvement in terms of multi-angle control of pipeline position and improving the accuracy of pipeline deformation control. Utility Model Content

[0003] The utility model aims to provide a foundation pit external pipeline protection structure which can enhance the pipeline deformation prevention and control effect.

[0004] The purpose of the utility model is achieved in this way: the foundation pit external pipeline protection structure is used to protect the pipeline outside the pit, the pipeline outside the pit is located outside the foundation pit support pile, and pipeline control grooves are dug in the soil outside the pit at uniform intervals along the longitudinal direction of the pipeline outside the pit;

[0005] It includes a supporting inclined pipe obliquely inserted from the bottom of the pipeline position control groove to the bottom of the pipeline outside the pit, and the outer periphery of the supporting inclined pipe is grouting to form a slurry solid around the pipe;

[0006] Support side plates and pile side support piers are respectively arranged on the outer side surfaces of the foundation pit support piles from bottom to top, and alignment bolts are arranged between the support side plates and the pipeline outside the pit;

[0007] Reinforcement support columns are installed inside the pipeline control groove and on the outside of the pipeline outside the pit, and suspension beams are installed on the top of the reinforcement support columns and the pile side support piers;

[0008] A U-shaped suspension rod is also provided on the pipe outside the pit, and the pipe outside the pit is placed at the bottom of the suspension rod; the top of the suspension rod passes through the hole reserved on the suspension beam, and is fixed and adjusted by a nut.

[0009] The advantages of the utility model are:

[0010] (1) A supporting inclined pipe and slurry around the pipe are installed below the pipe outside the pit to improve the bearing capacity of the soil outside the pit.

[0011] (2) A suspension rod is arranged between the pipeline outside the pit and the suspension beam, which can provide vertical suspension for the pipeline outside the pit.

[0012] (3) An oblique alignment bolt is set between the outside-pit pipeline and the foundation pit support piles, which can provide an oblique upward support force for the outside-pit pipeline and improve the deformation control accuracy of the outside-pit pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] In the figure: 1- foundation pit supporting piles; 2- pipelines outside the pit; 3- pipeline position control grooves; 4- supporting inclined pipes; 41- slurry solids around the pipes; 42- slurry pressure holes; 51- supporting side plates, 52- positioning bolts; 521- screw rods; 522- nuts; 53- bolt end hinges; 54- anchor bolts; 61- pile side support piers; 62- reinforcement support columns; 63- suspension beams; 7- suspension pull rods; 21- pipe side pressure plates; 8- soil outside the pit. DETAILED DESCRIPTION

[0015] The present invention is described in detail below in conjunction with the accompanying drawings:

[0016] The technical requirements for the construction of foundation pit support piles, the technical requirements for the driving and grouting of supporting inclined pipes, the technical requirements for the rolling and welding of steel plates, etc. will not be repeated in this implementation mode, and the implementation mode of the structure involved in this utility model will be explained in detail.

[0017] like Figure 1 As shown: the foundation pit external pipeline protection structure is characterized by: being used to protect the outside-pit pipeline 2, the outside-pit pipeline 2 is located outside the foundation pit support pile 1, and pipeline position control grooves 3 are dug in the outside-pit soil 8 at uniform intervals along the longitudinal direction of the outside-pit pipeline 2;

[0018] It includes a supporting inclined pipe 4 obliquely inserted from the bottom of the pipeline position control groove 3 to the bottom of the pipeline outside the pit 2, and the outer periphery of the supporting inclined pipe 4 is grouting to form a pipe periphery slurry solid 41;

[0019] A supporting side plate 51 and a pile side support pier 61 are respectively arranged on the outer side surface of the foundation pit support pile 1 from bottom to top, and a positioning bolt 52 is arranged between the supporting side plate 51 and the outer pipeline 2 of the pit;

[0020] A reinforcement support column 62 is provided inside the pipeline position control groove 3 and outside the pipeline 2 outside the pit, and a suspension beam 63 is provided on the top of the reinforcement support column 62 and the pile side support pier 61;

[0021] A U-shaped suspension rod 7 is also provided on the outside-pit pipeline 2, and the outside-pit pipeline 2 is placed at the bottom of the suspension rod 7; the top end of the suspension rod 7 passes through the hole reserved on the suspension beam 63, and the position of the suspension rod 7 is fixed and adjusted by an adjusting nut.

[0022] According to current construction requirements, the foundation pit support piles 1 are reinforced concrete cast-in-place piles with a diameter of 800 mm. The outer pit pipe 2 is a plastic threaded pipe with a diameter of 1000 mm.

[0023] During construction, pipeline control grooves 3 are usually dug in the soil 8 outside the pit at uniform intervals along the longitudinal direction of the pipeline 2 outside the pit; the soil 8 outside the pit is silty soil; the pipeline control grooves 3 are 1m deep and 3m wide.

[0024] The supporting inclined pipe 4 is formed by rolling a steel pipe with a diameter of 300 mm. Cement mortar with a strength mark of M20 is provided on the outer periphery of the supporting inclined pipe 4 to form a pipe periphery slurry solid 41 .

[0025] The side wall of the supporting inclined tube 4 is provided with a slurry pressure slurry hole 42 communicating with the inside and outside, and the angle between the supporting inclined tube 4 and the horizontal plane is 15-30°.

[0026] The supporting side plate 51 and the pile side support pier 61 are both made of rolled steel plates, wherein the supporting side plate 51 is 30 cm wide and 30 cm high; the pile side support pier 61 has a right-angled trapezoidal cross section, with a height of 20 cm, a top width of 50 cm, and a bottom width of 20 cm.

[0027] The reinforcing support column 62 is made of H-shaped steel with a specification of 200×200×8×12 and the suspension beam 63 is made of H-shaped steel with a specification of 200×200×8×12 and rolled.

[0028] The suspension rod 7 is rolled from a screw with a diameter of 20 mm, is "U"-shaped, and has a width of 800 mm; the bottom end of the suspension rod 7 passes through the lower surface of the pipe outside the pit 2, and the top end passes through the hole reserved on the suspension beam 63, and the position of the suspension rod 7 and the pipe outside the pit 2 is adjusted by a nut.

[0029] The side wall of the supporting inclined pipe 4 is provided with a slurry slurry hole 42 which is communicated with the inside and outside. The slurry slurry hole 42 is a hole with a diameter of 60 mm.

[0030] The alignment bolt 52 includes two screw rods 521 and a nut 522. The nut 522 is provided with two sections of threads with opposite thread directions. The two screw rods 521 are respectively threadedly connected to the corresponding threads, so that when the nut 522 is rotated, the two screw rods 521 move towards or in opposite directions.

[0031] The utility model further comprises an anchor bolt 54, through which the supporting side plate 51 is fixedly connected to the foundation pit support pile 1. The anchor bolt 54 is made of steel bars with a diameter of 20 mm.

[0032] Since the tightening directions of the screw rods on both sides of the nut are opposite, the two ends of the alignment bolt are respectively connected to the supporting side plate and the pipe side pressure plate through bolt end hinges; the supporting side plate is firmly connected to the foundation pit supporting piles through anchor bolts.

[0033] Bolt end hinges 53 are provided on the screw rods 521 at both ends of the calibration bolt 52, and the outer wall of the pipeline 2 outside the pit is provided with a pipe side pressure plate 21. The two bolt end hinges 53 are respectively connected to the supporting side plate 51 and the pipe side pressure plate 21.

[0034] The bolt end hinge 53 adopts a ball hinge with a diameter of 20 mm; the angle between the calibration bolt 52 and the horizontal plane is 15 to 30 degrees. During actual construction, the angle between the calibration bolt 52 and the horizontal plane is 20 degrees.

[0035] The pipe side pressure plate 21 connection is made of rolled steel plate with a thickness of 10 mm, the inner diameter is the same as the outer diameter of the pipe 2 outside the pit, and the width is 20 cm.

[0036] The utility model improves the bearing capacity of the soil outside the pit by setting a supporting inclined pipe and a slurry solid around the pipe below the outside pit pipe. A suspension pull rod is set between the outside pit pipe and the suspension beam to provide a vertical suspension effect on the outside pit pipe. In addition, an oblique alignment bolt is set between the outside pit pipe and the foundation pit support pile, which can provide an oblique upward support force for the outside pit pipe and improve the deformation control accuracy of the outside pit pipe. Finally, it is achieved to reduce the deformation of the pipe and reduce the impact of the foundation pit construction on the pipe.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The external pipeline protection structure of the foundation pit is characterized by: Used to protect the pipeline outside the pit (2), the pipeline outside the pit (2) is located outside the foundation pit support pile (1), and pipeline control grooves (3) are dug at uniform intervals in the soil outside the pit (8) along the longitudinal direction of the pipeline outside the pit (2); It comprises a supporting inclined pipe (4) obliquely inserted from the bottom of the pipeline position control groove (3) to the bottom of the pipeline outside the pit (2), and the outer periphery of the supporting inclined pipe (4) is grouting to form a pipe periphery slurry solid (41); A supporting side plate (51) and a pile side support pier (61) are respectively arranged from bottom to top on the outer side surface of the foundation pit supporting pile (1), and a positioning bolt (52) is arranged between the supporting side plate (51) and the pipeline (2) outside the pit; A reinforcement support column (62) is provided inside the pipeline position control groove (3) and on the outer side of the pipeline (2) outside the pit, and a suspension beam (63) is provided on the top of the reinforcement support column (62) and the pile side support pier (61); A U-shaped suspension rod (7) is also provided on the outside-pit pipeline (2), and the outside-pit pipeline (2) is placed at the bottom of the suspension rod (7); the top end of the suspension rod (7) passes through a hole reserved on the suspension beam (63), and the position of the suspension rod (7) is fixed and adjusted by an adjusting nut.

2. The foundation pit external pipeline protection structure according to claim 1 is characterized in that: The side wall of the supporting inclined tube (4) is provided with a slurry pressure slurry hole (42) which is communicated with the inside and outside, and the angle between the supporting inclined tube (4) and the horizontal plane is 15-30°.

3. The foundation pit external pipeline protection structure according to claim 1 is characterized in that: The alignment bolt (52) comprises two screw rods (521) and a nut (522). The nut (522) is provided with two sections of threads with opposite thread directions. The two screw rods (521) are respectively threadedly connected to the corresponding threads, so that when the nut (522) is rotated, the two screw rods (521) move towards or in opposite directions.

4. The foundation pit external pipeline protection structure according to claim 3 is characterized in that: Bolt end hinges (53) are provided on the screw rods (521) at both ends of the alignment bolt (52), and a pipe side pressure plate (21) is provided on the outer side wall of the pipeline outside the pit (2), and the two bolt end hinges (53) are respectively connected to the supporting side plate (51) and the pipe side pressure plate (21).

5. The foundation pit external pipeline protection structure according to claim 1 is characterized in that: The angle between the alignment bolt (52) and the horizontal plane is 15-30°.

6. The foundation pit external pipeline protection structure according to claim 1 is characterized in that: It also comprises anchor bolts (54), and the supporting side plate (51) is fixedly connected to the foundation pit supporting pile (1) via the anchor bolts (54).

Images