Vertical shaft primary lining close to underground building without forcible entry of building side wall
By designing the U-shaped cross-section and inserting the vertical shaft initial lining method of the air-facing side wall, the demolition problem caused by the interference of the vertical shaft lining and the underground building side wall is solved, and the lining ring without decomposition is achieved, reducing costs and increasing the efficiency.
Patent Information
- Application Number
- CN202420603118.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-27
AI Technical Summary
For vertical shafts adjacent to underground buildings, because their linings interfere with the side walls of underground buildings, in order to make the linings form a ring, it is necessary to break down the side walls of underground buildings.
By designing that the cross-section of the initial lining of the shaft is U-shaped, the U-shaped two feet are inserted into the air-side wall and fixedly connected to the air-side wall. The entire underground building is used as one side of the shaft to lining the wall, so that there is no need to interfere with the The side walls of the building were demolished.
The vertical shaft lining can be completed without breaking down the side walls of the underground building, reducing construction costs and improving construction efficiency.
Smart Images
Figure CN222457431U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shaft lining, in particular to a primary lining of a vertical shaft which is adjacent to an underground building but does not require demolition of a side wall of the building. Background Art
[0002] In underground construction, whether it is a tunnel or a shaft, lining is required to resist the ground pressure. Lining can be understood as a reinforced concrete cylinder extending along the excavation direction, which is divided into two layers. The two layers of lining are respectively recorded as primary lining (abbreviated as primary lining or primary lining) and secondary lining (abbreviated as secondary lining).
[0003] To ensure that the lining can effectively resist the ground pressure, the lining is required to be "ringed", that is, the arch frame and the concrete sprayed on the hanging net must be connected to form a complete ring in the cross section (circular ring, square ring, or irregular ring). For the shaft adjacent to the underground building, since its lining interferes with the side wall of the underground building, it is necessary to demolish the side wall of the underground building to make the lining into a ring.
[0004] The inventor calculated that for the side wall of an underground building, if the wall surface of the side wall facing away from the stratum is an air-facing surface (i.e., a surface in contact with the air rather than the stratum), then the side of the shaft lining adjacent to the underground building is not subject to stratum pressure. In this case, even if the lining is not in a ring, but the lining wall interfering with the side wall of the building is omitted, it can effectively resist stratum pressure. This point is applied to the D1 exit shaft of Beitaipingzhuang Station on Beijing Metro Line 19, avoiding the demolition of the side wall of the basement of the adjacent Jingning Guoda Building, reducing construction costs and improving construction efficiency. Utility Model Content
[0005] The utility model provides a primary lining of a vertical shaft which is adjacent to an underground building but does not require demolition of a side wall of the building.
[0006] The technical problem to be solved is: for a vertical shaft adjacent to an underground building, since its lining interferes with the side wall of the underground building, in order to make the lining into a ring, it is necessary to demolish the side wall of the underground building.
[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions: a primary lining of a shaft adjacent to an underground building but without demolishing the side walls of the building, wherein the side wall of the underground building adjacent to the shaft is the wall surface facing away from the shaft as the air-facing surface and is recorded as the air-facing side wall, and the cross-section of the primary lining is U-shaped, and the two legs of the U-shaped are inserted into the air-facing side wall and fixedly connected to the air-facing side wall.
[0008] Furthermore, the primary lining is the primary lining of multiple vertical shafts arranged side by side along the air-facing side wall, the cross-section of each vertical shaft is rectangular, and in the primary lining of the vertical shafts, the primary linings of each vertical shaft are connected as one, and in the integrated primary lining, the primary lining located between two vertical shafts is recorded as a middle primary lining, and the remaining primary linings are recorded as peripheral primary linings.
[0009] Furthermore, the peripheral primary lining is a lining with a grid as an arch frame, and the arch frame of the peripheral primary lining is connected end to end as a whole; the intermediate primary lining is a lining with an I-beam as an arch frame, and one end of the I-beam is supported on the arch frame of the peripheral primary lining and connected thereto as a whole.
[0010] Furthermore, the arches of the peripheral primary lining are connected by means of angle steels, and the angle steels are arranged in pairs at the joints of the arches of the peripheral primary lining. Each pair of angle steels is welded to the main reinforcements of the arches on both sides of the joint, and the two angle steels in each pair are bolted together after being fitted together. An end plate perpendicular to the arch is welded to the end of the arch of the intermediate primary lining, and the end plate is bolted and welded to the arch of the peripheral primary lining.
[0011] The webs of the arch frames of the primary lining of the intermediate septum are arranged horizontally.
[0012] Furthermore, the bending positions of the arch frames of the primary lining of each shaft are respectively provided with corner reinforcement steels, wherein the corner reinforcement steels are I-beams with the webs arranged horizontally, and the two ends of the I-beams are respectively fixedly connected to the two arms at the bending positions.
[0013] Furthermore, the end of the arch frame of the primary lining close to the air-facing side wall is inserted into the blind hole on the air-facing side wall, and the gap between the arch frame and the hole wall is filled with sprayed concrete.
[0014] Compared with the prior art, the utility model of the primary lining of a shaft adjacent to an underground building without demolishing the side wall of the building has the following beneficial effects:
[0015] In the utility model, the primary lining of the shaft is inserted into the side wall of the underground building and connected therewith as a whole, and the entire underground building is used as a lining wall on one side of the shaft, thereby eliminating the need to demolish the interfering side wall of the building. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the structure of a primary lining of a vertical shaft adjacent to an underground building but without demolishing the side wall of the building, and the perspective in the figure is a top view;
[0017] Figure 2 It is a schematic diagram of the connection method of the arch frame of the primary lining of the outer perimeter;
[0018] In the figure, 1 is the side wall facing the air, 21 is the primary lining of the outer periphery, 22 is the primary lining of the middle partition, and 3 is the corner reinforcement steel. DETAILED DESCRIPTION
[0019] Take the D1 exit shaft of Beitaipingzhuang Station on Line 19 of Beijing Subway to which the utility model is applied as an example. Figure 1-2 As shown, a primary lining of a shaft adjacent to an underground building but without demolishing the side wall of the building, among the side walls of the underground building, the side wall adjacent to the shaft facing away from the shaft is the air-facing side, and is recorded as the air-facing side wall 1.
[0020] Note that the utility model has a strict scope of application. The side wall of the underground building adjacent to the shaft must be the air-facing side wall 1. If not, the non-looped lining in the utility model cannot remain stable, which will cause the side wall of the underground building adjacent to the shaft to collapse, and then the entire lining will begin to collapse. The air-facing side wall 1 here does not function as a part of the lining wall, and it does not bear the stratum pressure at all. The side walls at other locations of the underground building bear the stratum pressure.
[0021] The cross section of the primary lining is U-shaped, and the two legs of the U-shaped lining are inserted into the air side wall 1 and fixedly connected to the air side wall 1. This is done to ensure that the lining wall perpendicular to the air side wall 1 and in contact with the stratum does not collapse, to allow the lining wall perpendicular to the air side wall 1 to help the lining wall parallel to the air side wall 1 resist the stratum pressure and not be compressed, and to facilitate the installation of the arch frame.
[0022] The primary lining is the primary lining of multiple vertical shafts arranged side by side along the air-facing side wall 1. The cross-section of each vertical shaft is rectangular. In the primary lining of the vertical shafts, the primary linings of each vertical shaft are connected as one. In the integrated primary lining, the primary lining located between two vertical shafts is recorded as the middle primary lining 22, and the remaining primary linings are recorded as the peripheral primary lining 21.
[0023] Although the intermediate primary lining 22 does not directly contact the stratum, it can help the lining wall parallel to the air-facing side wall 1 to resist the stratum pressure.
[0024] The outer primary lining 21 is a lining with a grid as an arch frame, and the arch frames of the outer primary lining 21 are connected end to end as a whole; the intermediate primary lining 22 is a lining with an I-beam as an arch frame, and one end of the I-beam is supported on the arch frame of the outer primary lining 21 and connected thereto as a whole.
[0025] The grille can be understood as a truss column made of steel bars tied together. It is not only easy to adjust the size, but also allows concrete to enter inside, so it can better integrate with the concrete and the side wall 1 facing the air to resist the ground pressure, so it is set on the periphery. The I-beam has a better effect in resisting axial force, so it is set inside.
[0026] like Figure 2As shown, the arches of the peripheral primary lining 21 are connected by means of angle steels, which are arranged in pairs at the joints of the arches of the peripheral primary lining 21, and each pair of angle steels are welded to the main reinforcements of the arches on both sides of the joints, and the two angle steels in each pair are bolted together after being fitted together; the end of the arch of the intermediate primary lining 22 is welded with an end plate perpendicular to the arch, and the end plate is bolted and welded to the arch of the peripheral primary lining 21.
[0027] Since the primary lining is not looped and there are many connection requirements, a series of connection structures are specially set up for this situation to quickly connect. It is not easy to weld between grids, so angle steel is used for bolting. I-beams are easy to weld but difficult to fix, so they are bolted in place and then welded for reinforcement, which is bolt-welding connection.
[0028] The web of the arch frame of the primary lining 22 is arranged horizontally to facilitate the combination with the steel mesh and concrete.
[0029] Corner reinforcement steel is respectively arranged at the bending position of the arch frame of the primary lining of each shaft. The corner reinforcement steel is an I-beam with the web plate horizontally arranged, and the two ends of the I-beam are respectively fixedly connected to the two arms at the bending position.
[0030] The end of the arch frame of the primary lining close to the air side wall 1 is inserted into the blind hole on the air side wall 1, and the gap between the arch frame and the hole wall is filled with shotcrete. The blind hole is to ensure that the arch frame can withstand the axial force.
[0031] The utility model discloses a primary lining of a shaft adjacent to an underground building but without demolishing the side wall of the building, and the construction method thereof comprises the following steps:
[0032] Step 1: excavate the first vertical shaft along the airside wall 1 and construct its primary lining;
[0033] Step 2: excavate the next shaft and construct its primary lining so that its primary lining is connected with the primary lining of the previous shaft;
[0034] Step 3: Repeat step 2 until all shafts are constructed.
[0035] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.
Claims
1. A primary lining of a shaft adjacent to an underground building without demolishing the side wall of the building, characterized in that: Among the side walls of the underground building, the side wall adjacent to the shaft facing away from the shaft is the free side, and is recorded as the free side wall (1). The cross section of the primary lining is U-shaped, and the two legs of the U-shaped are inserted into the free side wall (1) and fixedly connected to the free side wall (1).
2. A primary lining for a vertical shaft adjacent to an underground building but without demolishing the side wall of the building according to claim 1, characterized in that: The primary lining is the primary lining of a plurality of vertical shafts arranged side by side along the air-facing side wall (1), the cross-section of each vertical shaft is rectangular, and in the primary lining of the vertical shafts, the primary linings of each vertical shaft are connected as one body, and in the integrated primary lining, the primary lining located between two vertical shafts is marked as the middle primary lining (22), and the remaining primary linings are marked as the peripheral primary lining (21).
3. A primary lining of a vertical shaft adjacent to an underground building without demolishing the side wall of the building according to claim 2, characterized in that: The outer primary lining (21) is a lining with a grid as an arch frame, and the arch frames of the outer primary lining (21) are connected end to end to form a whole; the intermediate primary lining (22) is a lining with an I-beam as an arch frame, and one end of the I-beam is supported on the arch frame of the outer primary lining (21) and connected thereto as a whole.
4. A primary lining for a vertical shaft adjacent to an underground building without demolishing the side wall of the building according to claim 3, characterized in that: The arches of the peripheral primary lining (21) are connected by means of angle steels, which are arranged in pairs at the joints of the arches of the peripheral primary lining (21), and each pair of angle steels is respectively welded to the main reinforcements of the arches on both sides of the joint, and the two angle steels in each pair are bolted together after being fitted together; an end plate perpendicular to the arch is welded to the end of the arch of the intermediate primary lining (22), and the end plate is bolted and welded to the arch of the peripheral primary lining (21); The web of the arch frame of the intermediate septum primary lining (22) is arranged horizontally.
5. A primary lining of a vertical shaft adjacent to an underground building without demolishing the side wall of the building according to claim 2, characterized in that: The bending positions of the arch frames of the primary lining of each shaft are respectively provided with corner reinforcement steels, which are I-beams with the web plate horizontally arranged, and the two ends of the I-beams are respectively fixedly connected to the two arms at the bending positions.
6. A primary lining for a vertical shaft adjacent to an underground building without demolishing the side wall of the building according to claim 1, characterized in that: The end of the arch frame of the primary lining close to the air-facing side wall (1) is inserted into the blind hole on the air-facing side wall (1), and the gap between the arch frame and the hole wall is filled with sprayed concrete.