CN209067097U - Catenary mast foundation pit water drilling excavating device - Google Patents

Abstract

The utility model discloses a water drill excavation device for a catenary pillar foundation pit, which comprises a support frame supported above the excavated catenary pillar foundation pit, a mounting base arranged on the inner bottom of the support frame, and a top-to-bottom vertical The rhinestone is installed on the rhinestone bracket, and the rhinestone bracket is located above the excavated catenary pillar foundation pit; the support frame, the installation base and the excavated catenary pillar foundation pit are all located on the same side of the catenary; support A lifting device is provided on the rack. The utility model has the advantages of simple structure, reasonable design, convenient construction and good use effect. The water drill is used to excavate the catenary pillar foundation pit, and the lifting device is used to take out the stones in the excavated foundation pit, so that the disturbance to the surrounding rock formation is small, and the It can effectively reduce environmental pollution, and at the same time, it has high construction efficiency and is economical and practical.

Description

Catenary pillar foundation pit rhinestone excavation device

technical field

The utility model belongs to the technical field of catenary construction, in particular to a water drilling and excavation device for a catenary pillar foundation pit.

Background technique

The catenary is a high-voltage transmission line erected in a "zigzag" shape above the rail in an electrified railway for the pantograph to draw current. The catenary is the main frame of the railway electrification project. It is a special form of transmission line erected along the railway line to supply power to the electric locomotive. It is composed of contact suspension, support device, positioning device, pillar and foundation. Among them, the strut (also called catenary strut) is the support equipment of the catenary, and the strut is the catenary equipment used to bear the load of the contact suspension and the support device and fix the contact suspension at a specified height. When the catenary is constructed in the stone section, the construction of the catenary pillar foundation pit (that is, the foundation pit for the bottom of the catenary pillar) is difficult to construct and the construction efficiency is low, especially when the catenary line is long and the catenary pillar foundation pit is When the number is larger, the required construction time is longer. For example, when constructing a railway line passing through a rocky section, especially when the mileage of the catenary is long, a large number of catenary pillar foundation pits and cable-pulling pits need to be excavated, and hundreds or even thousands of stone pits need to be constructed. foundation pit.

At present, when excavating stone foundation pits without blasting, it is usually an excavation method that combines air compressors and air picks manually. When excavating a 3.0m cube foundation pit, 2 people are required to cooperate to excavate and it takes about 15 days to complete the excavation. The labor cost and fuel cost are high, especially when the number of excavated foundation pits is large, the investment cost higher. In addition, most of the excavation methods in the stone section nowadays rely on blasting, crushing, expansion, etc., generally using large-scale machinery and equipment, requiring many workers, inconvenient handling, high equipment investment cost, low construction efficiency, and the need for the surrounding area. Side environmental pollution is more serious. Therefore, it is necessary to design a non-blasting method excavation device for stone foundation pit with simple structure, reasonable design and good use effect, which can easily and quickly complete the excavation process of catenary foundation pit in the stone section. Among them, the stony section refers to the section where the stratum is rock, the stratum is rock, and the stony foundation pit is a foundation pit excavated in the rock.

Utility model content

The technical problem to be solved by the present utility model is to provide a catenary pillar foundation pit water drilling excavation device, which is simple in structure, reasonable in design, simple in construction and good in use effect, aiming at the deficiencies in the above-mentioned prior art. The pillar foundation pit is excavated and the lifting device is used to take out the stones in the foundation pit after excavation, which has little disturbance to the surrounding rock formation, and can effectively reduce environmental pollution. At the same time, the construction efficiency is high, economical and practical.

In order to solve the above-mentioned technical problems, the technical scheme adopted by the present utility model is: a catenary pillar foundation pit water drilling excavation device, which is characterized in that: it comprises a support frame supported above the excavated catenary pillar foundation pit, a support frame arranged on the catenary pillar foundation pit, The mounting base at the inner bottom of the support frame and the water drill for vertical drilling from top to bottom, the water drill is installed on the water drill bracket, the water drill bracket is a bracket for the water drill to be installed, and the water drill bracket is located at the Excavate above the catenary pillar foundation pit; the excavated catenary pillar foundation pit is a vertical foundation pit for the catenary pillar installation and located on one side of the catenary pillar erected by the catenary pillar, and the bottom of the support frame is supported on the catenary pillar. Excavate the ground on the peripheral side of the catenary pillar foundation pit; the support frame, the installation base and the excavated catenary pillar foundation pit are all located on the same side of the catenary; the installation base includes the installation of a water drill support The horizontal mounting seat and the front bracket and the rear bracket respectively arranged on the front and rear sides of the excavated catenary pillar foundation pit, the front bracket and the rear bracket are symmetrically arranged and both are vertical brackets, so The vertical bracket is a height-adjustable bracket, and the front bracket and the rear bracket form an adjustment frame for adjusting the vertical height of the horizontal mounting seat up and down; the water drill bracket is installed at the bottom of the horizontal mounting seat, and the horizontal installation The front and rear sides of the seat are respectively supported on the front side bracket and the rear side bracket; a lifting device is arranged on the support frame.

The above-mentioned catenary pillar foundation pit water drilling excavation device is characterized in that: the excavated catenary pillar foundation pit is a cube pit, the front side support and the rear side support are arranged in parallel and both are along the width of the cube pit Orientation layout.

The above-mentioned catenary support foundation pit excavation device is characterized in that: the front support and the rear support are arranged perpendicular to the catenary.

The above-mentioned catenary pillar foundation pit rhinestone excavation device is characterized in that: the support frame includes a front support and a rear support arranged symmetrically with the front support, the front support and the rear support are arranged in parallel and both They are respectively arranged on the front and rear sides of the excavated catenary pillar foundation pit.

The above-mentioned catenary support foundation pit excavation device is characterized in that: the front support and the rear support are located between the front support and the rear support, and the excavated catenary support foundation pit is located on the front support and the rear bracket.

The above-mentioned catenary support foundation pit excavation device is characterized in that: the front support and the rear support are arranged perpendicular to the catenary.

The above-mentioned catenary pillar foundation pit rhinestone excavation device is characterized in that: the support frame further comprises an upper transverse support rod connected between the top of the front support and the top of the rear support, and the upper transverse support rod is horizontal Arrangement; the front bracket and the rear bracket are arranged vertically and both are herringbone brackets, and the herringbone bracket is composed of an outer support rod and an inner support rod, and the outer support rod and the inner support rod are respectively It is arranged on both sides of the inner side of the excavated catenary support pillar foundation pit, the inner support rod in the herringbone bracket is located on the side close to the contact net, and the upper parts of the outer support rod and the inner support rod are fixed on the The upper lateral support rod and the bottom of both are supported on the ground on the peripheral side of the excavated catenary pillar foundation pit.

The above-mentioned catenary support foundation pit water drilling device is characterized in that: the support frame further comprises a front connecting rod connected between the bottom of the outer support rod and the bottom of the inner support rod of the front support, connected to the rear support The rear connecting rod between the bottom of the middle and outer struts and the bottom of the inner strut and the outer connecting rod connected between the bottom of the outer strut of the front bracket and the bottom of the outer strut of the rear bracket; the front bracket and The rear bracket is fastened and connected as a whole through the upper lateral support rod, the front connecting rod, the rear connecting rod and the outer connecting rod.

The above-mentioned catenary pillar foundation pit rhinestone excavation device is characterized in that: the lifting device is a hoist, the outer end of the hoist is equipped with a hook, and the hook is suspended on a horizontal level after passing through an upper lateral support rod. above the mount.

The above-mentioned catenary support foundation pit rhinestone excavation device is characterized in that: the front side bracket and the rear side bracket are both door-shaped brackets, and the door-shaped bracket is composed of two left and right vertical poles and is connected to the two described The horizontal support rods between the vertical vertical rods are formed; the front and rear ends of the horizontal mounting seat are respectively supported on the horizontal support rods of the front side bracket and the rear side bracket.

Compared with the prior art, the utility model has the following advantages:

1. The structure is simple, the design is reasonable and the construction cost is low. After the support frame is erected, it is only necessary to install the water drill support on the mounting base arranged at the inner bottom of the support frame to start drilling and excavation. After completion, use the lifting equipment on the support frame to lift the stone out.

2. The construction is simple, the excavation is carried out with water drills, the construction speed is fast, the construction safety is guaranteed, and the excavation quality can be effectively guaranteed. First, a plurality of tangential boreholes are drilled along the outline of the excavated catenary pillar foundation pit by using water drills to separate the rock in the excavated catenary pillar foundation pit from the rock on the outer periphery of the pit; for the convenience of For later crushing, a plurality of tangential holes can be drilled in the middle of the excavated catenary pillar foundation pit, so as to divide the rock in the excavated catenary pillar foundation pit into multiple stones, and then use the excavated contact net pillar foundation pit The rock in the foundation pit of the net pillar is crushed, and then the crushed stones are lifted out of the foundation pit by the lifting device. At this time, since the rock in the foundation pit is divided into multiple independent stones, the crushing process is very simple, the operation is simple, Low cost input, high efficiency, safety and reliability.

3. The construction efficiency is high and the construction period is short. Compared with the traditional excavation method that uses a combination of air compressors and air picks for excavation, the cubic foundation pit with a size of 0.9m in length, 1.0mm in width and 3.0m in depth is required. When excavating, 2 people are required to cooperate to excavate and it only takes about 5 days to complete the excavation. The labor cost is greatly reduced, and the labor intensity is reduced. It is easy to understand and can effectively improve the operation efficiency, thereby greatly speeding up the excavation progress of the stone foundation pit, making full use and exertion of various resources, and shortening the construction time, greatly improving the construction efficiency and saving the cost input. . Especially when the number of excavated foundation pits is large, the effect is more obvious. Remove the drill core after each drill down. After drilling around and in the middle of the foundation pit, a gully is formed along the outline of the foundation pit and a gully is formed in the middle of the foundation pit, and then the wedge is used for expansion and crushing, and the stones can be taken out after the expansion and crushing. The excavation device is simple, the transportation is convenient, the number of personnel required is simple, the construction process is simple, the erection of the support frame is simple, the process of drilling down the water drill and taking out the stone after crushing is simple and easy, the operation process is simple and easy to control, and the support frame adopts The commonly used scaffolding method has the characteristics of simple construction process, high construction efficiency, saving labor and materials, and high efficiency. During the drilling process, after drilling and during the crushing process, water can be used to flush the foundation pit. On the one hand, dust pollution can be reduced, and on the other hand, the quality of the excavated and formed foundation pit can be effectively guaranteed. The flushing water can be used repeatedly.

4. The use effect is good, and a new excavation device for small foundation pits for stone catenary pillars is provided. The use of water drills for excavation can effectively reduce the environmental pollution caused by blasting and excavation, and can reduce the impact of air picks. The dust, noise and soil and water pollution in the excavation process of other excavation methods such as chisel and cutting machine cutting can also be recycled. At the same time, the water can also be recycled during the excavation process of the rhinestone. , and further achieve the purpose of reducing environmental pollution.

5. During the excavation process, the disturbance to the surrounding rock formation is small, which can meet the excavation requirements of the catenary pillar foundation pit of the existing railway line in the rocky section of the mountain, and is very beneficial to the protection, requirements and geological disturbance of the existing catenary equipment. It can avoid the damage caused by other excavation methods, especially in the construction of bridge pile foundations in stone sections, power line tower foundations and railway catenary pillar foundation pit construction, and has great promotion value.

6. It is suitable for the foundation excavation construction of non-blasting excavation in the stone section. It can be used in the foundation construction of high-speed railway, ordinary speed railway, special line catenary, bridge pile foundation and other foundation construction of non-blasting excavation in stone section. To achieve the purpose of double promotion of benefit and efficiency.

The technical solutions of the present utility model will be described in further detail below through the accompanying drawings and embodiments.

Description of drawings

FIG. 1 is a reference schematic diagram of the use state of the present invention.

Fig. 2 is a schematic diagram showing the location of drilling holes in the catenary pillar foundation pit excavated by the utility model.

Explanation of reference numbers:

1—the excavated catenary pillar foundation pit; 2—the rhinestone support; 3—the front support;

4—rear side bracket; 5—horizontal mounting seat; 6—upper lateral support rod;

7—Outer support rod; 8—Inside support rod; 9—Front connecting rod;

10—rear connecting rod; 11—external connecting rod; 12—hoist;

13—Hook; 14—Reinforced connecting rod; 15—Drilled hole;

16—Rock; 17—Guide pulley.

Detailed ways

As shown in FIG. 1 , the present invention includes a support frame standing above the excavated catenary pillar foundation pit 1, a mounting base arranged at the bottom of the inner side of the support frame, and a water drill for vertical drilling from top to bottom , the water drill is installed on the water drill support 2, the water drill support 2 is a support for the water drill to be installed, and the water drill support 2 is located above the excavated catenary pillar foundation pit 1; the excavated catenary pillar foundation pit 1 is a vertical foundation pit for the catenary pillar to be installed and located on one side of the catenary pillar erected by the catenary pillar, and the bottom of the support frame is supported on the ground on the perimeter of the excavated catenary pillar foundation pit 1; the described The support frame, the installation base and the excavated catenary pillar foundation pit 1 are all located on the same side of the catenary; the installation base includes the horizontal installation base 5 installed by the water drill bracket 2 and the The front side brackets 3 and the rear side brackets 4 on the front and rear sides of the mesh pillar foundation pit 1, the front side brackets 3 and the rear side brackets 4 are symmetrically arranged and both are vertical brackets, and the vertical brackets are adjustable in height. Adjusting bracket, the front bracket 3 and the rear bracket 4 form an adjustment bracket for adjusting the vertical height of the horizontal mounting seat 5 up and down; the water drill bracket 2 is installed at the bottom of the horizontal mounting seat 5, and the horizontal mounting seat 5 The front and rear sides of the frame are respectively supported on the front side bracket 3 and the rear side bracket 4; the support frame is provided with a lifting device.

Wherein, the ground is the upper surface of the rock 2 where the excavated catenary pillar foundation pit 1 is located. The water drill support 2 is a drill stand of the water drill, and the drill stand is a conventional drill stand of the water drill.

As shown in FIG. 2 , the excavated catenary pillar foundation pit 1 is a cube pit, the front support 3 and the rear support 4 are arranged in parallel and both are arranged along the width direction of the cube pit.

In this embodiment, both the front side bracket 3 and the rear side bracket 4 are arranged perpendicular to the contact net.

Wherein, the width direction of the cubic pit refers to the direction in which the catenary is arranged vertically, also referred to as the vertical line direction, that is, the direction perpendicular to the catenary line; the length direction of the cube pit refers to the The catenary is arranged in a parallel direction, also known as the line direction, that is, the direction parallel to the catenary line.

As shown in FIG. 1 , the support frame includes a front support and a rear support arranged symmetrically with the front support. The front support and the rear support are arranged in parallel and are respectively arranged on the excavated catenary pillars. The front and rear sides of the foundation pit 1.

In this embodiment, the front support 3 and the rear support 4 are both located between the front support and the rear support, and the excavated catenary pillar foundation pit 1 is located between the front support 3 and the rear support 4 between.

In addition, the front support and the rear support are arranged perpendicular to the contact net.

In this embodiment, the support frame further includes an upper lateral support rod 6 connected between the top of the front support and the top of the rear support, and the upper lateral support rod 6 is arranged horizontally; the front support and the The rear supports are arranged vertically and both are herringbone supports, and the herringbone supports are composed of outer support rods 7 and inner support rods 8, and the outer support rods 7 and the inner support rods 8 are respectively arranged in the opening. Dig both sides of the inner side of the catenary pillar foundation pit 1, the inner support rod 8 in the herringbone bracket is located on the side close to the contact net, and the upper parts of the outer support rod 7 and the inner support rod 8 are fixed on the The upper lateral support rod 6 and the bottom of both are supported on the ground on the perimeter of the excavated catenary pillar foundation pit.

In this embodiment, the included angle between the outer support rod 7 and the horizontal plane is smaller than the included angle between the inner support rod 8 and the horizontal plane.

For stable support, the support frame also includes a front connecting rod 9 connected between the bottom of the outer support rod 7 and the bottom of the inner support rod 8 in the front support, and connected to the bottom of the outer support rod 7 and the inner side of the rear support. The rear connecting rod 10 between the bottom of the strut 8 and the outer connecting rod 11 connected between the bottom of the outer strut 7 of the front bracket and the bottom of the outer strut 7 of the rear bracket; the front bracket and the The rear bracket is fastened and connected as a whole through the upper lateral support rod 6 , the front connecting rod 9 , the rear connecting rod 10 and the outer connecting rod 11 .

In this embodiment, the hoist 12 is installed on the outer connecting rod 11 .

In order to further improve the stability of the outer side of the support frame, and at the same time to improve the installation stability of the hoist 12, the support frame also includes a plurality of reinforced connecting rods 14 arranged from top to bottom. 14 are connected between the outer support rod 7 of the front support and the outer support rod 7 of the rear support, and the front end of each reinforcement connecting rod 14 is connected with the outer support rod 7 of the front support. The rear ends of each of the reinforcing connecting rods 14 are connected to the outer support rods 7 of the rear bracket.

In this embodiment, the plurality of reinforcing connecting rods 14 are all straight steel pipes.

The reinforcing connecting rod 14 and the outer support rod 7 are fastened and connected integrally by steel pipe fasteners.

In this embodiment, the plurality of reinforcing connecting rods 14 are arranged in parallel. The front connecting rod 9, the rear connecting rod 10 and the outer connecting rod 11 are all arranged horizontally.

Moreover, the upper lateral support rod 6 , the outer support rod 7 , the inner support rod 8 , the front connecting rod 9 , the rear connecting rod 10 and the outer connecting rod 11 are all straight steel pipes.

In order to facilitate disassembly and assembly, between the upper lateral support rod 6 and the outer support rod 7 and the inner support rod 8, between the outer connecting rod 11 and the outer support rod 7, the front connecting rod 9 and the outer support rod 7 and the inner support rod 8 and between the rear connecting rod 10 and the outer support rod 7 and the inner support rod 8 are fastened and connected together by steel pipe fasteners.

When the support frame is erected with a straight steel pipe, the straight steel pipe is light in weight, easy to move, and easy to erect in practice, and at the same time can meet the stable support requirements of the hoist.

In this embodiment, the front bracket 3 and the rear bracket 4 are both door-shaped brackets, and the door-shaped bracket is composed of two left and right vertical poles and a horizontal vertical pole connected between the two vertical poles. The front and rear ends of the horizontal mounting seat 5 are respectively supported on the horizontal support rods of the front side bracket 3 and the rear side bracket 4 .

In order to facilitate installation and later dismantling, the vertical vertical rod and the horizontal support rod are both straight steel pipes, and the vertical vertical rod and the horizontal support rod are fastened and connected as a whole through steel pipe fasteners.

When the front side bracket 3 and the rear side bracket 4 are erected with straight steel pipes, the straight steel pipes are light in weight, easy to move, easy to erect, and can meet the stable support requirements of the rhinestone. In addition, the vertical vertical rod and the horizontal support rod are connected by steel pipe fasteners, so that the horizontal support rod can be easily adjusted up and down, and the vertical vertical rod and the horizontal support rod are firmly fixed.

In this embodiment, the horizontal mounting base 5 is a square wood. The outer surface of the square wood is rough. Because the square wood itself has an anti-slip effect, the support is stable and only needs to be placed on the front side bracket 3 and the rear side bracket 4, so that the position of the horizontal mounting seat 5 can be easily carried out in the horizontal direction. Horizontal movement left and right and front and rear horizontal movement, so as to easily adjust the drilling position of the rhinestone.

As shown in FIG. 1 , the hoisting device is a hoist 12 , the outer end of the hoisting rope of the hoisting machine 12 is provided with a hook 13 , and the hook 13 is suspended above the horizontal mounting seat 5 after passing through the upper lateral support rod 6 .

In this embodiment, the suspending rope is a steel wire rope, and the hoist 12 is an electric hoist. The upper lateral support rod 6 is provided with a guide pulley 17 for guiding the suspending rope.

In actual construction, the excavated catenary pillar foundation pit 1 is a small foundation pit with a length of 0.8m-1m, a width of 0.9m-1.1m and a depth of 2.8m-3.2m.

In this embodiment, the length of the excavated catenary pillar foundation pit 1 is 0.9 m, the width is 1.0 m, and the depth thereof is 3.0 m.

During actual construction, the size of the excavated catenary pillar foundation pit 1 can be adjusted accordingly according to specific needs.

In this embodiment, the lengths of the outer support rods 7 and the inner support rods 8 are both 4m, and the length of the upper lateral support rods 6 is 1.5m. 1. The horizontal distance between the outer side walls is 0.5m-0.6m, and the horizontal distance between the inner support rod 8 and the inner side wall of the excavated catenary support pillar foundation pit 1 is 0.5m-0.6m. The length of the front connecting rod 9 and the rear connecting rod 10 are both 2m, the length of the outer connecting rod 11 is 1.5m, the height of the vertical pole is 1.5m, and the length of the horizontal support rod is 1m .

During actual processing, according to specific needs, the outer upper lateral support rod 6, the outer support rod 7, the inner support rod 8, the front connecting rod 9, the rear connecting rod 10, the outer connecting rod 11, the vertical pole and the The lengths of the horizontal support rods are adjusted accordingly.

The clear distance between the front side support 3 and the rear side support 4 and the excavated catenary pillar foundation pit 1 is not less than 0.2m. The bottom of the vertical pole is installed in the installation hole opened on the ground on the 1 circumference side of the excavated catenary pillar foundation pit, and the installation hole is a vertical drill hole opened on the rock 16 .

In actual use, a plurality of drill holes 15 are drilled from top to bottom on the rock 16 where the excavated catenary pillar foundation pit 1 is located by using the water drill, and the excavated catenary pillar foundation pit 1 is vertical. Cube pits arranged in the vertical direction; a plurality of the boreholes 15 are arranged vertically and have the same structure and size, and the plurality of the boreholes 3 are all cylindrical holes and their depths are the same as those of the excavated catenary pillars. The depth of foundation pit 1 is the same, see Figure 2 for details;

The drilled holes 15 are front side drilled holes, rear side drilled holes, external drilled holes, internal drilled holes or middle drilled holes. The number of holes is multiple; a plurality of the front side holes are arranged on the same vertical surface from left to right along the excavation contour line of the front side wall of the excavated catenary pillar foundation pit 1, and they form the front side. Drilling group, a plurality of the front drilling holes are evenly arranged, and the distance between two adjacent front drilling holes is smaller than the hole diameter of the front drilling holes; a plurality of the rear drilling holes are arranged along the The excavation contour lines of the rear side wall of the excavated catenary pillar foundation pit 1 are arranged on the same vertical plane from left to right and form a rear drilling group; a plurality of the outer drilling holes are along the excavated catenary pillars. The excavation contour lines of the outer side wall of the foundation pit 1 are arranged on the same vertical surface from left to right and form an outer drilling group. The excavation contour lines are arranged on the same vertical surface from left to right and form an inner drilling group, and a plurality of the middle drilling holes are arranged in the same vertical along the length direction of the excavated catenary pillar foundation pit 1 from front to back. On the straight surface and it forms a middle drilling group, the middle drilling group is arranged between the front drilling group and the rear drilling group; the hole between the adjacent two rear drilling holes is The spacing, the spacing between two adjacent outer drill holes, the spacing between two adjacent inner drill holes, and the spacing between two adjacent middle drill holes are all the same as those of the two adjacent ones. The spacing between the front holes is the same; the inner side wall of the excavated catenary pillar foundation pit 1 is the side wall on the side close to the catenary. In Fig. 2, L represents the line center line of the catenary.

After the drilling is completed, a gully is formed along the outline of the foundation pit and a gully is formed in the middle of the foundation pit, and then the wedge can be used to easily expand and crush. After the expansion and crushing, the lifting device can be used to take out the stones.

The above are only preferred embodiments of the present utility model, and do not limit the present utility model. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present utility model still belong to the scope of the present utility model. within the protection scope of the technical solution of the present invention.

Claims (10)

1. A catenary prop foundation pit water drilling excavation device is characterized in that: comprising a support frame supported on the top of the excavated catenary prop foundation pit (1), a mounting base arranged at the bottom of the inner side of the support frame and A rhinestone for vertical drilling from top to bottom, the rhinestone is installed on a rhinestone bracket (2), the rhinestone bracket (2) is a bracket for the rhinestone to be installed, and the rhinestone bracket (2) is located at the opening Excavate above the catenary pillar foundation pit (1); the excavated catenary pillar foundation pit (1) is a vertical foundation pit for installation of the catenary pillar and located on one side of the catenary where the catenary pillar is erected, and the support The bottom of the frame is supported on the ground on the peripheral side of the excavated catenary pillar foundation pit (1); the support frame, the mounting base and the excavated catenary pillar foundation pit (1) are all located in the same area of the catenary. side; the mounting base includes a horizontal mounting seat (5) mounted on a water drill support (2), and a front side support (3) and a rear side support respectively arranged on the front and rear sides of the excavated catenary pillar foundation pit (1). (4), the front bracket (3) and the rear bracket (4) are symmetrically arranged and both are vertical brackets, the vertical bracket is a height adjustable bracket, and the front bracket (3) and the rear side bracket (4) to form an adjustment frame for adjusting the vertical height of the horizontal mounting seat (5) up and down; the water drill bracket (2) is mounted on the bottom of the horizontal mounting seat (5), and the horizontal mounting seat (5) The front and rear sides of the ) are respectively supported on the front bracket (3) and the rear bracket (4); a lifting device is provided on the support frame. 2. The catenary prop foundation pit water drilling device according to claim 1, wherein the excavated catenary prop foundation pit (1) is a cube pit, and the front support (3) and the rear support (4) They are arranged in parallel and both are arranged along the width direction of the cube pits. 3. The catenary support foundation pit excavation device according to claim 1 or 2, characterized in that both the front support (3) and the rear support (4) are arranged perpendicular to the catenary. 4. The catenary pillar foundation pit water drilling device according to claim 1 or 2, wherein the support frame comprises a front support and a rear support arranged symmetrically with the front support, the front support and The rear supports are arranged in parallel, and the two are respectively arranged on the front and rear sides of the excavated catenary pillar foundation pit (1). 5. The catenary pillar foundation pit hydraulic excavation device according to claim 4, wherein the front support (3) and the rear support (4) are located between the front support and the rear support During the period, the excavated catenary pillar foundation pit (1) is located between the front side support (3) and the rear side support (4). 6 . The catenary support foundation pit hydraulic excavation device according to claim 4 , wherein the front support and the rear support are arranged perpendicular to the catenary. 7 . 7. The catenary pillar foundation pit water drilling excavation device according to claim 4, characterized in that: the support frame further comprises an upper lateral support rod ( 6), the upper lateral support rod (6) is arranged horizontally; the front support and the rear support are arranged vertically and both are herringbone support, and the herringbone support is formed by the outer support rod (7). ) and an inner support rod (8), the outer support rod (7) and the inner support rod (8) are respectively arranged on both sides of the inner side of the excavated catenary support pillar foundation pit (1). The inner support rod (8) is located on the side close to the contact net, and the upper parts of the outer support rod (7) and the inner support rod (8) are fixed to the upper lateral support rod (6) and the bottoms of the two are both fixed. It is supported on the ground on the peripheral side of the excavated catenary pillar foundation pit (1). 8. The catenary support foundation pit water drilling device according to claim 7, wherein the support frame further comprises a bottom and an inner support rod (8) connected to the middle and outer support rods (7) of the front support. A front connecting rod (9) between the bottoms, a rear connecting rod (10) connected between the bottom of the outer support rod (7) and the bottom of the inner support rod (8) in the rear bracket, and a rear connecting rod (10) connected to the front support An outer connecting rod (11) between the bottom of the outer support rod (7) and the bottom of the outer support rod (7) of the rear support; the front support and the rear support are connected through the upper lateral support rod (6), the front support The rod (9), the rear connecting rod (10) and the outer connecting rod (11) are fastened and connected as a whole. 9. The catenary pillar foundation pit water drilling excavation device according to claim 7, wherein the lifting device is a hoist (12), and the outer end of the hoisting rope of the hoist (12) is provided with a hook (13), the hook (13) is suspended above the horizontal mounting seat (5) after passing through the upper lateral support rod (6). 10. The catenary prop foundation pit water drilling excavation device according to claim 1 or 2, characterized in that: the front side support (3) and the rear side support (4) are both door-shaped supports, and the door-shaped support The bracket is composed of two left and right vertical poles and a horizontal support pole connected between the two vertical poles; the front and rear ends of the horizontal mounting seat (5) are respectively supported on the front side brackets (3) and on the horizontal support rod of the rear side bracket (4).