Pipe jacking oblique crossing construction structure for oblique crossing of pipe jacking construction channel and station
By introducing grouting reinforcement areas and pipe curtain support structures in the top pipe construction, combined with the rear cast ring beam and backfill concrete layer, the problems of uneven pressure of the soil silo and poor waterproofing effect in the top pipe oblique construction are solved, and a wide range of applications, low cost and good waterproofing effect are achieved.
Patent Information
- Application Number
- CN202421483300.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The existing pipe top construction technology has limitations when dealing with pipe top diagonal conditions. Especially under the restrictions of road planning and surrounding buildings, it is difficult to ensure uniform pressure of the soil warehouse and soil stability. The traditional method is costly and has poor waterproofing effect.
A oblique construction structure for pipe top is proposed, including the overhead construction section, concealed excavation construction section and station. By setting up grouting reinforcement areas and pipe curtain support structures, a water stop curtain layer is formed, combined with the rear pouring ring beam and the backfilling concrete layer, the oblique construction between the overhead passage and the station is realized.
This structure is suitable for various oblique angles, reducing the risk of water leakage and sand surge when the pipe header is out of the hole, improving waterproofing effect, reducing construction costs, and effectively controlling ground settlement.
Smart Images
Figure CN222835760U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of civil engineering construction, in particular to a pipe jacking construction structure. Background Art
[0002] At present, there are more and more cases of pipe jacking construction in the construction methods of entrance and exit passages of subway stations across my country, and the pipe jacking construction technology is becoming more and more mature. In order to ensure uniform pressure in the soil bins on the left and right sides of the pipe jacking machine and the stability of the soil, the starting wall and the receiving wall are designed to be perpendicular to the axis direction of the pipe jacking passage. When it is necessary to design it in a form oblique to the starting wall or the receiving wall due to road planning restrictions or restrictions on existing buildings and underground pipelines in the surrounding area, the current pipe jacking construction technology has certain limitations.
[0003] There are two existing technologies for dealing with the situation of oblique intersection of jacking pipes: First, the concrete pipe segments of the jacking pipe that extend beyond the end wall at the oblique intersection receiving end are cut, but this method of cutting the pipe segments can only be used for the situation where the jacking pipe and the channel intersect at a small angle, and the last section of the pipe segment partially intrudes into the end wall. Second, the jacking machine shell is discarded, the steel shell of the jacking machine is partially cut, and the steel shell of the jacking machine is used as the permanent structure of the channel. This method is expensive, and waterproofing the channel becomes a problem. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the shortcomings and defects mentioned in the above background technology and provide a jacking pipe oblique intersection construction structure which is suitable for various oblique intersection angles, has low cost and good waterproof effect, and is obliquely crossed with the station by the jacking pipe construction channel.
[0005] In order to solve the above technical problems, the technical solution proposed by the utility model is:
[0006] A pipe jacking oblique intersection construction structure in which a pipe jacking construction channel obliquely intersects with a station comprises a pipe jacking construction section, a dark excavation construction section and a station, wherein the pipe jacking construction section and the dark excavation construction section are on the same straight line, the pipe jacking construction section and the station obliquely intersect, and the dark excavation construction section is located between the pipe jacking construction section and the station.
[0007] The above-mentioned jacking pipe construction section and the above-mentioned dark excavation construction section are on the same straight line, which means that the dark excavation construction section is on the extension line of the jacking pipe channel of the jacking pipe construction section; the above-mentioned jacking pipe construction section and the station section are obliquely intersecting, which means that the direction of the axis of the jacking pipe channel of the jacking pipe construction section is not perpendicular orthogonal to the wall of the station receiving end.
[0008] In the above-mentioned oblique pipe jacking construction structure, preferably, the pipe jacking construction section is provided with a grouting reinforcement area at one end adjacent to the dark excavation construction section, and the grouting reinforcement area is arranged around the pipe jacking channel in the pipe jacking construction section.
[0009] In the above-mentioned oblique pipe jacking construction structure, preferably, a pipe curtain support structure is provided at the dark excavation construction section, and the pipe curtain support structure includes a pipe curtain driven into the dark excavation construction section by the station and a water-stop curtain layer formed by grouting outwards from the pipe curtain, the outlet end of the pipe curtain extends into the grouting reinforcement area, and the water-stop curtain layer is connected to the grouting reinforcement area.
[0010] In the utility model, by setting up the grouting reinforcement area, it can be combined with the water-stop curtain layer of the dark excavation construction section to better improve the waterproof effect and greatly reduce the risk of water leakage and sand gushing when the pipe jacking machine exits the hole. The above-mentioned grouting reinforcement area can be obtained by horizontal grouting in the hole, and the water-stop curtain layer can be obtained by pipe curtain grouting.
[0011] In the above-mentioned jacking pipe oblique construction structure, preferably, an internal support structure is also provided in the pipe curtain support structure, and the internal support structure includes a secondary lining structure layer and a mesh shotcrete structure layer from the inside to the outside, and a grid steel frame is provided in the mesh shotcrete structure layer, and the secondary lining structure layer and the mesh shotcrete structure layer are provided in a circle around the inner cavity of the dark excavation construction section, and the mesh shotcrete structure layer is connected to the pipe curtain support structure.
[0012] In the above-mentioned oblique pipe jacking construction structure, preferably, a backfill concrete layer is provided on the bottom surface of the inner cavity of the dark excavation construction section.
[0013] In the above-mentioned jacking pipe oblique construction structure, preferably, a post-cast ring beam is provided at the adjacent part of the jacking pipe construction section and the dark excavation construction section. By providing the post-cast ring beam, the jacking pipe segment and the concrete structure of the dark excavation construction section can be integrated, and can also play a waterproof role. The position of the post-cast ring beam is set at the concrete structure of the jacking pipe section at the exit and the dark excavation construction section.
[0014] The construction method of the top pipe oblique construction structure of the utility model may include the following steps: 1) drilling and grouting the grouting reinforcement area by means of horizontal grouting in the hole, and if it does not affect the ground traffic, the ground vertical grouting method may be adopted; 2) following up the Φ299 pipe curtain by horizontal drilling from the station, the pipe curtain is overlapped by locking buckles, and grouting is performed in the pipe at the same time, and the stratum around the pipe curtain is reinforced through the plum blossom-shaped holes in the steel pipe wall to form a water-stop curtain layer, and the pipe curtain may also be constructed at the bottom when necessary to form a closed section; the length of the steel pipe of the pipe curtain is greater than the channel length of the dark excavation construction section but does not pass through the grouting reinforcement area to play a role in water stopping; 3) Excavate the tunnel of the dark excavation construction section, support it as you go, and promptly erect steel grids and mesh sprayed concrete structural layers to form a closed support section; 4) Construct waterproofing and secondary lining structural layers for the tunnel of the dark excavation construction section, and perform secondary grouting reinforcement on the heading face when necessary; 5) Adjust the excavation parameters and posture of the pipe jacking machine, and control the excavation speed at 1-2mm / min after entering the grouting reinforcement area; 6) Stop and position the pipe jacking machine after it exits the tunnel, and promptly grout and seal the tunnel in the portal area; 7) Move the pipe jacking machine horizontally out of the dark excavation construction section and hoist it out from the reserved hole in the main body of the station; 8) Cast the ring beam after construction and backfill the bottom with concrete.
[0015] The utility model of the oblique pipe jacking construction structure, for the situation where the pipe jacking construction section and the station are obliquely intersected, before the pipe jacking machine enters the station, an additional dark excavation construction section is set up, and the pipe jacking machine enters the station through the dark excavation construction section. This receiving method solves the problem of uneven force on the left and right sides, water leakage and sand gushing, ground subsidence, and direction deviation caused by the oblique receiving of the pipe jacking machine. It is suitable for various oblique angles and has a wide range of applications. It does not need to cut the pipe segments or discard the outer shell of the pipe jacking machine like the traditional oblique receiving method, so the cost is relatively lower and the waterproof effect is better. In addition, the utility model of the oblique pipe jacking construction structure adopts a pipe curtain support structure as an advance support measure for the dark excavation construction section, which can not only increase the support stiffness of the dark excavation section and strictly control the ground settlement, but also the combination of the water-stop curtain layer formed by grouting and the grouting reinforcement area can greatly reduce the risk of water leakage and sand gushing when the pipe jacking machine exits the hole.
[0016] Compared with the prior art, the advantages of the utility model are:
[0017] 1. The oblique pipe jacking construction structure of the utility model solves the problem that the left and right sides are subjected to uneven force when the pipe jacking machine is receiving obliquely, resulting in water leakage, sand gushing, ground subsidence, direction deviation, etc.
[0018] 2. The oblique intersection construction structure of the jacking pipe of the utility model can be applied to the situations where the jacking pipe channel of the jacking pipe construction section and the station section are obliquely intersected at small angles or large angles, and has a wider scope of application.
[0019] 3. The oblique construction structure of the jacking pipe of the utility model does not need to cut the pipe segments, nor does it need to discard the outer shell of the jacking machine. The cost is relatively low and the water-stopping effect is better. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 It is an elevation view of the jacking pipe oblique construction structure in which the jacking pipe construction channel in the embodiment obliquely intersects with the station (the arrow in the figure indicates the excavation direction).
[0022] Figure 2 It is a longitudinal section view of the jacking pipe oblique construction structure in which the jacking pipe construction channel in the embodiment obliquely intersects with the station (the arrow in the figure indicates the excavation direction).
[0023] Figure 3 for Figure 1 Cross-section view of the middle aa plane.
[0024] Figure 4 for Figure 1 Cross-section of the middle bb surface.
[0025] Legend
[0026] 1. Pipe jacking construction section; 2. Underground excavation construction section; 3. Grouting reinforcement area; 4. Station; 5. Pipe curtain; 7. Mesh shotcrete structure layer; 8. Secondary lining structure layer; 9. Pipe jacking section; 10. Post-cast ring beam; 11. Backfill concrete. DETAILED DESCRIPTION
[0027] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and carefully below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.
[0028] It should be noted that when an element is described as being "fixed, fixed, connected or connected to" another element, it can be directly fixed, fixed, connected or connected to the other element, or it can be indirectly fixed, fixed, connected or connected to the other element through other intermediate connectors.
[0029] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present utility model.
[0030] Example:
[0031] like Figure 1 and Figure 2 As shown, the jacking pipe construction structure in which the jacking pipe construction channel of this embodiment obliquely intersects with the station includes a jacking pipe construction section 1, a dark excavation construction section 2 and a station 4. The jacking pipe construction section 1 and the dark excavation construction section 2 are on the same straight line, the jacking pipe construction section 1 and the station 4 are obliquely intersected, and the dark excavation construction section 2 is located between the jacking pipe construction section 1 and the station 4.
[0032] In this embodiment, a grouting reinforcement area 3 is provided at one end of the jacking pipe construction section 1 adjacent to the dark excavation construction section 2 , and the grouting reinforcement area 3 is arranged around the jacking pipe channel in the jacking pipe construction section 1 .
[0033] like Figure 3 , Figure 4 As shown, in this embodiment, a pipe curtain support structure is provided at the dark excavation construction section 2, and the pipe curtain support structure includes a pipe curtain 5 driven into the dark excavation construction section 2 by the station 4 and a water-stop curtain layer formed by grouting outwards through the pipe curtain 5, and the outlet end of the pipe curtain 5 extends into the grouting reinforcement area 3, and the water-stop curtain layer is connected to the grouting reinforcement area 3.
[0034] In this embodiment, an internal support structure is also provided in the pipe-curtain support structure, and the internal support structure includes a secondary lining structure layer 8 and a mesh shotcrete structure layer 7 from the inside to the outside. A grid steel frame is provided in the mesh shotcrete structure layer 7. The secondary lining structure layer 8 and the mesh shotcrete structure layer 7 are provided in a circle around the inner cavity of the dark excavation construction section 2, and the mesh shotcrete structure layer 7 is connected to the pipe-curtain support structure.
[0035] In this embodiment, a backfill concrete layer 11 is provided on the bottom surface of the inner cavity of the dark excavation construction section 2 .
[0036] In this embodiment, a post-cast ring beam 10 is provided adjacent to the jacking pipe construction section 1 and the dark excavation construction section 2. The post-cast ring beam 10 is provided at the concrete structure of the jacking pipe section 9 at the exit and the dark excavation construction section 2.
[0037] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A pipe jacking oblique intersection construction structure in which a pipe jacking construction channel obliquely intersects with a station, characterized in that: It comprises a pipe jacking construction section (1), a dark excavation construction section (2) and a station (4), wherein the pipe jacking construction section (1) and the dark excavation construction section (2) are on the same straight line, the pipe jacking construction section (1) and the station (4) are obliquely intersected, and the dark excavation construction section (2) is located between the pipe jacking construction section (1) and the station (4); The jacking pipe construction section (1) is provided with a grouting reinforcement area (3) at one end adjacent to the dark excavation construction section (2), and the grouting reinforcement area (3) is arranged around the jacking pipe channel in the jacking pipe construction section (1); A pipe curtain support structure is provided at the dark excavation construction section (2), the pipe curtain support structure comprising a pipe curtain (5) driven into the dark excavation construction section (2) by the station (4) and a water-stop curtain layer formed by grouting outwards through the pipe curtain (5), the outlet end of the pipe curtain (5) extends into the grouting reinforcement area (3), and the water-stop curtain layer is connected to the grouting reinforcement area (3).
2. The pipe jacking oblique construction structure according to claim 1 is characterized in that: An inner supporting structure is also provided inside the pipe-roof supporting structure. The inner supporting structure comprises, from the inside to the outside, a secondary lining structure layer (8) and a mesh shotcrete structure layer (7). A grid steel frame is provided in the mesh shotcrete structure layer (7). The secondary lining structure layer (8) and the mesh shotcrete structure layer (7) are provided in a circle around the inner cavity of the dark excavation construction section (2). The mesh shotcrete structure layer (7) is connected to the pipe-roof supporting structure.
3. The pipe jacking oblique construction structure according to claim 1 or 2, characterized in that: A backfill concrete layer (11) is provided on the bottom surface of the inner cavity of the dark excavation construction section (2).
4. The jacking pipe oblique construction structure according to claim 1 or 2, characterized in that: A post-cast ring beam (10) is provided adjacent to the pipe jacking construction section (1) and the dark excavation construction section (2).