Tube push bench receiving well structure transformed from existing narrow inspection well

Abstract

The utility model discloses a pipe push bench receiving well structure transformed by utilizing an existing narrow inspection well, which comprises the existing inspection well and a receiving transverse hole, the well diameter of the existing inspection well is not greater than the length of a machine body of a pipe push bench, the receiving transverse hole is arranged at a hole outlet position of the pipe push bench, and the receiving transverse hole is arranged along the axis of a newly-built sewer line. The hole opening of the receiving transverse hole is communicated with the existing inspection well, and the height of a cavity of the receiving transverse hole is larger than the diameter of a machine body of the pipe jacking machine. The receiving device is simple in structure and ingenious in conception, the receiving transverse hole is excavated in the bottom of the existing inspection well, secondary construction is conducted on the internal structure of the existing receiving well, the internal space of the receiving well is optimized, the receiving work of the pipe jacking machine is completed, the construction period is effectively shortened, the construction cost is effectively reduced, and the construction efficiency is improved. And the purposes of reducing cost and increasing efficiency are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe jacking construction, in particular to a pipe jacking machine receiving well structure reconstructed by using an existing narrow inspection well. Background Technique

[0002] Pipe jacking construction is a trenchless construction method, which is a pipeline laying construction technology with little or no excavation. The pipe jacking method is to generate thrust in the launching shaft by means of the jacking equipment, overcome the friction between the pipeline and the surrounding soil, jack the pipeline into the soil according to the designed gradient, and transport the soil away. After one section of the pipeline is jacked into the soil layer, the next section of the pipeline is jacked in continuously. Its principle is to push the pipe jacking machine from the launching shaft through the soil layer to the receiving well by means of the thrust of the main jacking oil cylinders and between the pipelines and the relay chambers, etc. The pipeline follows the pipe jacking machine, and gradually completes the pipeline laying operation between the launching shaft and the receiving well.

[0003] Due to the convenient and fast pipe jacking construction and the characteristic of less open excavation, it is often used in the relocation projects of urban rainwater and sewage pipelines. In the relocation projects of urban rainwater and sewage pipelines, in order to save construction costs and reduce the traffic relocation workload, existing inspection wells are often used as receiving wells. However, the diameter of the existing inspection wells in the downtown area is small. According to the current construction method, the narrow existing receiving wells cannot meet the construction space requirements. Therefore, it is necessary to temporarily construct a temporary receiving well with a larger diameter near it. After the receiving is completed, the temporary receiving well is backfilled and the traffic is restored. The construction of the temporary receiving well is only for receiving the pipe jacking machine. After the pipe jacking machine is received, it needs to be backfilled, which belongs to additional workload, wastes costs and delays the construction period. Moreover, the temporary receiving well needs to vacate the construction site and traffic diversion is required, increasing the workload again.

[0004] Therefore, how to complete the reception of the pipe jacking machine through a narrow existing inspection well without excavating a temporary receiving well has become an urgent technical problem to be solved. Content of the Utility Model

[0005] The purpose of the utility model is to provide a pipe jacking machine receiving well structure reconstructed by using an existing narrow inspection well to solve the technical problems described in the background technique.

[0006] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0007] A pipe jacking machine receiving well structure reconstructed by using an existing narrow inspection well includes an existing inspection well and a receiving cross tunnel. The diameter of the existing inspection well is not greater than the body length of the pipe jacking machine. The receiving cross tunnel is opened at the position where the pipe jacking machine exits the hole. The receiving cross tunnel is opened along the axis of the newly built sewer pipe. The entrance of the receiving cross tunnel is connected to the existing inspection well, and the chamber height of the receiving cross tunnel is greater than the body diameter of the pipe jacking machine.

[0008] Preferably, a support structure is provided inside the receiving cross tunnel.

[0009] Preferably, the support structure includes pipe roofs, support cross beams and support columns. The pipe roofs are fixedly arranged at the ceiling position of the receiving cross tunnel. The support cross beams are arranged below the pipe roofs for supporting and strengthening the pipe roofs. The support columns are vertically arranged at the side wall position of the receiving cross tunnel, and the top ends thereof abut against the ends of the support cross beams.

[0010] Preferably, the pipe roofs are made of steel pipes filled with concrete slurry, and the support cross beams and support columns are both made of square steel.

[0011] Preferably, the height of the chamber of the receiving cross tunnel is not less than three times the diameter of the body of the pipe jacking machine, the depth of the chamber of the receiving cross tunnel is not less than the body length of the pipe jacking machine, and the width of the chamber of the receiving cross tunnel is not less than twice the diameter of the body of the pipe jacking machine.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The structure of the present utility model is simple and ingenious. By excavating a receiving cross tunnel at the bottom of an existing inspection well, secondary construction is carried out on the internal structure of the existing receiving well without additional construction and additional traffic diversion, optimizing its internal space, completing the receiving work of the pipe jacking machine, effectively saving the construction period and construction cost, and achieving the purpose of cost reduction and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Through the following detailed description in conjunction with the accompanying drawings, the above and / or other aspects and advantages of the present utility model will become clearer and easier to understand. These drawings are only schematic and do not limit the present utility model, wherein:

[0014] Figure 1 is a schematic cross-sectional structure diagram after the installation of the pipe roofs of the present utility model;

[0015] Figure 2 is a schematic longitudinal-sectional structure diagram along the length direction of the pipe roofs after the installation of the pipe roofs of the present utility model;

[0016] Figure 3 is a schematic longitudinal-sectional structure diagram perpendicular to the length direction of the pipe roofs after the installation of the pipe roofs of the present utility model;

[0017] Figure 4 is a schematic cross-sectional structure diagram after the installation of the support cross beams and support columns of the present utility model;

[0018] Figure 5 is a schematic longitudinal-sectional structure diagram after the installation of the support cross beams and support columns of the present utility model;

[0019] Figure 6 is a schematic cross-sectional structure diagram during the hoisting stage of the pipe jacking machine of the present utility model;

[0020] Figure 7 This is a schematic vertical cross-sectional structure diagram of the pipe jacking machine during the hoisting stage of the present utility model;

[0021] Figure 8 This is a schematic vertical cross-sectional structure diagram of the pipe jacking machine during the flipping stage of the present utility model;

[0022] Figure 9 This is a schematic vertical cross-sectional structure diagram of the pipe jacking machine during the vertical lifting-off stage of the present utility model.

[0023] Reference numerals: 1, existing inspection well; 2, existing sewer pipe; 3, newly built sewer pipe; 4, receiving cross tunnel; 5, pipe jacking machine; 6, pipe shed; 7, support cross beam; 8, support column; 9, hoisting assembly. Detailed implementation manners

[0024] In the following, an embodiment of the receiving well structure of the pipe jacking machine modified by using an existing narrow inspection well of the present utility model will be described with reference to the drawings. The embodiments described herein are specific specific implementation manners of the present utility model and are used to illustrate the concept of the present utility model. They are all explanatory and exemplary and should not be construed as a limitation on the implementation manners of the present utility model and the scope of the present utility model. Except for the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the content disclosed in the claims and the specification of this application. These technical solutions include technical solutions that make any obvious substitutions and modifications to the embodiments described herein.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "top", "bottom", "upper", "lower", "inner", "outer", "horizontal", "vertical", "upright", "oblique", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0026] The drawings in this specification are schematic diagrams to assist in explaining the concept of the present utility model and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structures of the various components of the embodiments of the present utility model, the drawings are not drawn according to the same scale. The same reference numerals are used to represent the same parts.

[0027] The principles and features of the present utility model will be described below with reference to the drawings. The embodiments given are only used to explain the present utility model and are not used to limit the scope of the present utility model. The following combination ofFigures 1-9 , a further detailed description of the preferred embodiments of the present utility model will be given:

[0028] As Figures 1-5 shown, a structure of a receiving well for a pipe jacking machine modified from an existing narrow inspection well preferably used in the present utility model includes an existing inspection well 1 and a receiving cross tunnel 4. The well diameter of the existing inspection well 1 is not greater than the body length of the pipe jacking machine 5. The receiving cross tunnel 4 is opened at the position where the pipe jacking machine 5 exits the tunnel. The receiving cross tunnel 4 is opened along the axis of the newly built sewer pipe 3. The entrance of the receiving cross tunnel 4 is connected to the existing inspection well 1, and the chamber height of the receiving cross tunnel 4 is greater than the body diameter of the pipe jacking machine 5 to ensure that the pipe jacking machine 5 can gradually complete the state transformation from the lying state - the inclined state - the upright state, so that it can be lifted out of the relatively narrow existing inspection well 1 in the upright state. Of course, the prerequisite for the present utility model to function is that the well diameter of the existing inspection well 1 needs to be greater than the body diameter of the pipe jacking machine 1. Considering that the receiving cross tunnel 4 needs to meet the requirement that the pipe jacking machine 5 has sufficient turning space, and the on-site construction personnel have suitable additional standing and construction space, the chamber height of the receiving cross tunnel 4 is not less than three times the body diameter of the pipe jacking machine 5, the chamber depth of the receiving cross tunnel 4 is not less than the body length of the pipe jacking machine 5, and the chamber width of the receiving cross tunnel 4 is not less than twice the body diameter of the pipe jacking machine 5;

[0029] To ensure the stability of the chamber structure of the receiving cross tunnel 4 and prevent it from collapsing and caving in during the excavation and use stages, a support structure is provided inside the receiving cross tunnel 4. Considering that the geological conditions under the existing road surface are relatively good, the support structure is preferably set in a structural form including a pipe shed 6, a support cross beam 7, and a support column 8. The pipe shed 6 is fixedly arranged at the ceiling position of the receiving cross tunnel 4. The support cross beam 7 is arranged below the pipe shed 6 to support and reinforce the pipe shed 6. The support column 8 is vertically arranged at the side wall position of the receiving cross tunnel 4, and its top abuts against the end of the support cross beam 7. Of course, when the water content and the permeability coefficient of the formation are relatively high, drainage and waterproof measures can be supplemented to ensure the smooth progress of the receiving construction. In order to ensure the self-strength of the support structure and at the same time make it have the characteristics convenient for construction, the pipe shed 6 is preferably made of a steel pipe filled with concrete slurry, and the support cross beam 7 and the support column 8 are both preferably made of square steel.

[0030] In addition, the present utility model also provides a construction method for receiving a pipe jacking machine in an existing narrow inspection well by using the above-mentioned structure of a receiving well for a pipe jacking machine modified from an existing narrow inspection well, which specifically includes the following steps:

[0031] Step S1, construction preparation, close the lane around the wellhead of the existing inspection well 1, and remove the obstacles (structural objects such as manhole covers and roof plates) covering the wellhead of the existing inspection well 1;

[0032] Step S2: Excavate the receiving cross tunnel 4. Excavate the receiving cross tunnel 4 along the axis of the newly built sewer pipe 3 at the bottom of the existing inspection well 1, and carry out necessary support for the receiving cross tunnel 4 synchronously with the excavation progress. The receiving cross tunnel 4 can be excavated in advance or after the pipe jacking machine 5 advances to the bottom position of the receiving cross tunnel 4. The excavation timing is determined according to the on-site construction conditions. The specific excavation steps are as follows:

[0033] Step S21: Determine the excavation position of the receiving cross tunnel 4 on the well wall at the bottom of the existing inspection well 1 and pop out the excavation reference line.

[0034] Step S22: As shown in Figures 1-3 , construct the pipe shed 6 at the ceiling position of the receiving cross tunnel 4, which specifically includes:

[0035] Step S221: Drill holes at the ceiling position of the receiving cross tunnel 4 with a core drill.

[0036] Step S222: Install the ceiling steel pipes in the drilled holes. The steel pipes match the diameter of the drilled holes, and the internal space of their pipe cavities is filled and compacted with concrete slurry (grouting is carried out through a grouting device after the ceiling steel pipes are inserted). Their axes are set along the depth direction of the receiving cross tunnel 4, and their set length is not less than the depth of the chamber of the receiving cross tunnel 4.

[0037] Step S23: Demolish the well wall concrete at the portal position of the receiving cross tunnel 4, which specifically includes:

[0038] Step S231: Cut the well wall concrete at the portal position of the receiving cross tunnel 4 into pieces by drilling holes in the well wall concrete at the portal position of the receiving cross tunnel 4 with a core drill.

[0039] Step S232: Chop off the cut well wall concrete.

[0040] Step S24: As shown in Figures 4-5 , excavate the receiving cross tunnel 4 along the axis of the newly built sewer pipe 3 and install the support cross beam 7 and support column 8 to support the pipe shed 6 with the excavation progress until the excavation depth is reached.

[0041] Step S3: Pipe jacking tunneling. The pipe jacking machine 5 continuously tunnels into the receiving cross tunnel 4 and enters the existing inspection well 1 along the receiving cross tunnel 4 until the cutter head of the pipe jacking machine 5 enters.

[0042] Step S4: Hoist and flip. As shown in Figures 6-8 , connect and fix the hoisting assembly 9 at the cutter head position of the pipe jacking machine 5, and hoist the pipe jacking machine 5 out of the receiving cross tunnel 4 while pulling it out, so that it gradually flips from the lying state to the upright state.

[0043] Step S5: Lift the pipe jacking machine 5 off. As shown in Figure 9 , hoist the upright pipe jacking machine 5 out of the existing inspection well 1 through the hoisting assembly 9.

[0044] Step S6, construct the new sewage pipe 3, and complete the construction operation of the last section of the new sewage pipe 3.

[0045] Step S7, receive the backfill of the cross tunnel 4, backfill the cross tunnel 4, close the portal and construct waterproof measures.

[0046] Step S8, the construction is completed, reconstruct the shielding object at the wellhead of the existing inspection well 1, and resume the road traffic.

[0047] Embodiment 1

[0048] Next, take a certain actual engineering application example to introduce the above structure and method of the present application. In this example, the diameter of the existing inspection well 1 is 1.0 m, which is located in the middle of the existing lane. The new sewage pipe 3 intersects with the existing inspection well 1 at a 90° angle. The model of the pipe jacking machine 5 is RASA DHFs450, its length is 2.3 m, and its diameter is 50 mm. The size of the excavated receiving cross tunnel 4 is 2.5 m (length / depth) × 1.0 m (width) × 1.5 m (height). The ceiling steel pipe uses a steel pipe with a diameter of 100 mm, and its set length is 2.5 m. The ceiling steel pipes are densely arranged, and the gap between the ceiling steel pipes is not greater than 10 mm. Square steel pipes with a size of 50 mm × 100 mm are arranged at intervals of 500 mm at the bottom as the support cross beam 7 and the support column 8. After the head of the pipe jacking machine 5 enters the existing inspection well 1 by at least 0.5 m, a lifting point is welded at its cutter head and a lifting assembly 9 is connected for lifting.

[0049] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pipe jacking machine receiving well structure transformed from an existing narrow inspection well, characterized in that: It comprises an existing inspection well (1) and a receiving transverse hole (4), wherein the well diameter of the existing inspection well (1) is not greater than the body length of the pipe jacking machine (5), the receiving transverse hole (4) is opened at the exit position of the pipe jacking machine (5), the receiving transverse hole (4) is opened along the axis of the newly built sewer pipe (3), the hole opening of the receiving transverse hole (4) is connected to the existing inspection well (1), and the hole chamber height of the receiving transverse hole (4) is greater than the body diameter of the pipe jacking machine (5).

2. According to claim 1, a pipe jacking machine receiving well structure transformed from an existing narrow inspection well is characterized in that: A supporting structure is arranged inside the receiving transverse hole (4).

3. According to claim 2, a pipe jacking machine receiving well structure transformed from an existing narrow inspection well is characterized in that: The supporting structure comprises a pipe shed (6), a supporting crossbeam (7) and a supporting column (8); the pipe shed (6) is fixedly arranged at the ceiling position of the receiving transverse hole (4); the supporting crossbeam (7) is arranged below the pipe shed (6) for supporting and reinforcing the pipe shed (6); and the supporting column (8) is vertically arranged at the side wall position of the receiving transverse hole (4), and its top end abuts against the end of the supporting crossbeam (7).

4. According to claim 3, a pipe jacking machine receiving well structure transformed from an existing narrow inspection well is characterized in that: The pipe shed (6) is made of steel pipes filled with concrete slurry, and the supporting cross beams (7) and supporting columns (8) are both made of square steel.

5. According to claim 1, a pipe jacking machine receiving well structure transformed from an existing narrow inspection well is characterized in that: The height of the chamber of the receiving transverse hole (4) is not less than three times the diameter of the body of the pipe jacking machine (5), the depth of the chamber of the receiving transverse hole (4) is not less than the length of the body of the pipe jacking machine (5), and the width of the chamber of the receiving transverse hole (4) is not less than two times the diameter of the body of the pipe jacking machine (5).

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