A reinforcing structure for a shield segment in construction near an existing line
By installing support and grouting mechanisms in the new tunnel, and using hydraulic cylinders and grouting machines to form reinforced concrete, the problems of abnormal operation of the existing line and ground settlement were solved, the stability of the existing line and ground settlement were achieved, and the stability of the new tunnel and the ground were ensured.
Patent Information
- Application Number
- CN202423188880.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-24
AI Technical Summary
When constructing new lines, existing lines cannot operate normally and are prone to ground subsidence problems in the later stages of construction.
A shield tunnel segment reinforcement structure is adopted for construction near an existing railway line, including a support mechanism and a grouting mechanism. The mounting plate is installed on the new tunnel by mounting bolts. The segment body is supported by hydraulic cylinders and support blocks. Concrete is delivered into the unexcavated soil through a grouting machine and hollow anchor rods to form reinforcement concrete. After the support mechanism is removed, the segment body is limited by the reinforcement concrete and hollow anchor rods.
The new tunnel ensured the normal operation of the existing line and prevented ground subsidence. Through the synergistic effect of the support and reinforcement structures, the stability of the new tunnel and the ground were ensured.
Smart Images
Figure CN223608549U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to tunnel construction technical field, concretely is a kind of near existing line construction shield segment reinforcing structure. BACKGROUND
[0002] When the construction of new line is carried out near the subway line that has been built, the situation of coinciding with existing line will be faced. In this case, the construction needs to ensure the normal operation of existing line and the overall stability of new line. Due to the small minimum distance between tunnel and existing line, the difficulty of controlling settlement in the construction process is increased, especially when the existing line is under-passed, the ground surface condition often does not have the ability of reinforcement, so in order to ensure the normal operation of existing line and avoid the problem of ground settlement in the later stage of construction, a near existing line construction shield segment reinforcing structure is designed to solve the above problems. SUMMARY
[0003] The utility model aims at providing a kind of near existing line construction shield segment reinforcing structure to solve the problem of tunnel construction in the above background technique, and the normal operation of existing line cannot be ensured, and the ground settlement problem in the later stage of construction.
[0004] To achieve the above object, the utility model provides the following technical scheme, a kind of near existing line construction shield segment reinforcing structure, including existing tunnel and new tunnel, and the unexcavated soil body on existing tunnel and new tunnel, the pipe piece body is provided on the new tunnel, the pipe piece body is arranged at the bottom of unexcavated soil body, the surface of unexcavated soil body is provided with the support mechanism and grouting mechanism on the new tunnel, the support mechanism includes mounting plate, the surface of new tunnel is provided, mounting bolt is provided on the surface of mounting plate, support frame is fixedly connected on the surface of mounting plate, top plate is fixedly connected on the surface of support frame, hydraulic cylinder is fixedly connected on the surface of top plate, support block is fixedly connected on the piston rod of hydraulic cylinder, the grouting mechanism includes concrete mixing tank, the concrete mixing tank is arranged on the surface of new tunnel, grouting machine body is provided on the output end of concrete mixing tank, grouting pipe is connected to the output end of grouting machine body, grouting head is fixedly connected to the end away from grouting machine body of grouting pipe, threaded pipe is fixedly connected to the surface of grouting head, hollow anchor rod is screw-connected to the surface of threaded pipe, hollow anchor rod is connected to pipe piece body by perforation, limit bolt is screw-connected to the surface of hollow anchor rod, and the grouting mechanism is built with reinforced concrete inside unexcavated soil body.
[0005] Preferably, a plurality of groups of grouting holes are formed on the surface of the pipe piece body, and the grouting holes of the pipe piece body and the support mechanism are distributed in a staggered manner.
[0006] Preferably, the hollow anchor rod is connected to the grouting hole of the segment body, and the hollow anchor rod is inserted into the bottom of the unexcavated soil body through the segment body.
[0007] Preferably, the mounting plate is mounted on the new tunnel through mounting bolts, the mounting plate supports the top plate, the top plate has an arc shape, and the hydraulic cylinder is arranged on the top plate and has multiple groups.
[0008] Preferably, the hydraulic cylinder drives the support block to ascend and descend through the piston rod, the support block is connected to the bottom of the segment body, and the top plate supports the segment body through the hydraulic cylinder and the support block.
[0009] Preferably, the concrete mixer tank transports concrete to the grouting pipe through the grouting machine body, the grouting pipe transports the concrete to the inside of the unexcavated soil body through the grouting head and the hollow anchor rod, and the concrete forms reinforced concrete in the inside of the unexcavated soil body.
[0010] Preferably, the bottom of the hollow anchor rod is provided with an internal thread, the grouting head is threadedly connected to the bottom of the hollow anchor rod through the threaded pipe, and the limiting bolt is threadedly connected to the bottom of the hollow anchor rod after the reinforced concrete is formed.
[0011] Compared with the prior art, the utility model has the beneficial effects that:
[0012] 1、The reinforcing structure installs the mounting plate on the new tunnel through mounting bolts, the mounting plate supports the support frame through the mounting bolts, the support frame supports the hydraulic cylinder through the top plate, the support block is connected to the surface of the segment body through the piston rod, the hydraulic cylinder supports the segment body through the support block, the safety of the grouting mechanism is ensured, the threaded pipe is threadedly connected to the bottom of the hollow anchor rod at this time, the grouting pipe is connected to the bottom of the hollow anchor rod through the grouting head, the concrete mixer tank transports concrete to the inside of the unexcavated soil body through the grouting pipe and the hollow anchor rod, thereby forming reinforced concrete, the limiting bolt is threadedly connected to the bottom of the hollow anchor rod after the grouting head is removed from the bottom of the hollow anchor rod, the concrete is prevented from flowing back from the bottom of the hollow anchor rod, the grouting mechanism and the supporting mechanism are removed at this time, the segment body is limited by the reinforced concrete and the concrete in the hollow anchor rod when the reinforced concrete and the concrete in the hollow anchor rod solidify, thereby realizing the reinforcement of the segment body, the reinforcing mechanism ensures the normal operation of the existing line, and ground subsidence is avoided in the later construction period. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a front view and a sectional view schematic diagram of the utility model structure.
[0014] Figure 2 It is a front view and a sectional view schematic diagram of the supporting mechanism of the utility model.
[0015] Figure 3 It is a front view section view schematic diagram of the grouting mechanism of the utility model;
[0016] Figure 4 It is a front view section view solid schematic diagram of the connecting structure of the grouting head of the utility model;
[0017] Figure 5 It is a front view section view solid explosion schematic diagram of the bottom structure of the hollow anchor rod of the utility model.
[0018] In the figure: 1, not excavated soil body; 11, segment body; 12, reinforced concrete; 2, mounting plate; 21, mounting bolt; 22, support frame; 23, top plate; 24, hydraulic cylinder; 25, support block; 3, concrete mixing tank; 31, grouting machine body; 32, grouting pipe; 33, grouting head; 34, threaded pipe; 35, hollow anchor rod; 36, limit bolt. DETAILED DESCRIPTION
[0019] Please refer to Figures 1-5 The utility model provides an embodiment:
[0020] The utility model provides a kind of near existing line construction shield segment reinforcing structure: including existing tunnel and new tunnel, and the existing tunnel and the unexcavated soil body 1 on new tunnel, new tunnel is provided with segment body 11, segment body 11 is arranged in the bottom of unexcavated soil body 1, and the surface of unexcavated soil body 1 is provided with new tunnel and is provided with support mechanism and grouting mechanism, support mechanism includes mounting plate 2, is arranged on the surface of new tunnel, mounting plate 2 is provided with mounting bolt 21 on the surface, and mounting plate 2 is fixedly connected with support frame 22 on the surface, support frame 22 is fixedly connected with top plate 23 on the surface, and top plate 23 is fixedly connected with hydraulic cylinder 24 on the surface, and the piston rod of hydraulic cylinder 24 is fixedly connected with support block 25, grouting mechanism includes concrete mixer 3, and concrete mixer 3 is arranged on the surface of new tunnel, and the output of concrete mixer 3 is provided with grouting machine body 31, and the output of grouting machine body 31 is connected with grouting pipe 32, and the end away from grouting machine body 31 of grouting pipe 32 is fixedly connected with grouting head 33, and grouting head 33 is fixedly connected with threaded pipe 34 on the surface, and threaded pipe 34 is screw-connected with hollow anchor rod 35 on the surface, and hollow anchor rod 35 is connected on segment body 11 by perforation, and hollow anchor rod 35 is screw-connected with limit bolt 36 on the surface, and grouting mechanism constructs reinforcing concrete 12 inside unexcavated soil body 1, the reinforcing mechanism is started before grouting mechanism, and segment body 11 is supported by support mechanism, and grouting mechanism is grouted inside unexcavated soil body 1, so that concrete forms reinforcing concrete 12 inside unexcavated soil body 1, and reinforcing concrete 12 supports segment body 11 by hollow anchor rod 35, to realize the reinforcement of unexcavated soil body 1, and support mechanism can be removed after grouting mechanism is used, to avoid shielding new tunnel, the reinforcing mechanism guarantees the normal operation of existing line, while also avoiding ground subsidence in later period of construction.
[0021] Further, a plurality of grouting holes are formed on the surface of the segment body 11, and the grouting holes of the segment body 11 and the support mechanism are distributed in a staggered manner, so that the support block 25 of the support mechanism does not block the grouting holes, and the support mechanism can be operated when in use.
[0022] Further, the hollow anchor rod 35 is connected to the grouting hole of the segment body 11 by perforation, and the hollow anchor rod 35 is inserted into the bottom of the unexcavated soil body 1 through the segment body 11, so that the grouting position in the unexcavated soil body 1 is changed by the grouting hole of the segment body 11 through the hollow anchor rod 35.
[0023] Further, the mounting plate 2 is installed on the new tunnel by the mounting bolt 21, the mounting plate 2 supports the top plate 23 by the mounting bolt 21, the top plate 23 has an arc shape, and a plurality of hydraulic cylinders 24 are arranged on the top plate 23 to ensure the stability of the support for the unexcavated soil body 1.
[0024] Further, the hydraulic cylinder 24 drives the support block 25 to ascend and descend through the piston rod, the support block 25 is connected to the bottom of the segment body 11, and the top plate 23 supports the segment body 11 through the hydraulic cylinder 24 and the support block 25, thereby ensuring the stability of the position of the segment body 11 and avoiding the settlement phenomenon.
[0025] Further, the concrete mixer 3 delivers the concrete to the grouting pipe 32 through the grouting machine body 31, the grouting pipe 32 delivers the concrete to the inside of the unexcavated soil body 1 through the grouting head 33 and the hollow anchor rod 35, the concrete forms the reinforced concrete 12 in the inside of the unexcavated soil body 1, and the hollow anchor rod 35 also retains the concrete in the inside, thereby ensuring the structural strength of the hollow anchor rod 35 in the unexcavated soil body 1.
[0026] Further, the bottom of the hollow anchor rod 35 is provided with an internal thread, the grouting head 33 is threadedly connected to the bottom of the hollow anchor rod 35 through the threaded pipe 34, used for abutting the grouting pipe 32 and the hollow anchor rod 35, and the limiting bolt 36 is threadedly connected to the bottom of the hollow anchor rod 35 after the formation of the reinforced concrete 12, and the limiting bolt 36 can block the concrete in the inside of the hollow anchor rod 35, thereby avoiding the backflow of the concrete in the inside of the hollow anchor rod 35.
[0027] Working principle: the mounting plate 2 is mounted on the new tunnel through the mounting bolt 21, the mounting plate 2 supports the support frame 22 through the mounting bolt 21, the support frame 22 supports the hydraulic cylinder 24 through the top plate 23, the support block 25 is connected to the surface of the segment body 11 through the piston rod of the support block 25, the hydraulic cylinder 24 supports the segment body 11 through the support block 25, thereby ensuring the safety of the use of the grouting mechanism, at this time, the threaded pipe 34 is threadedly connected to the bottom of the hollow anchor rod 35, the threaded pipe 34 connects the grouting pipe 32 to the bottom of the hollow anchor rod 35 through the grouting head 33, the grouting machine body 31 delivers the concrete to the inside of the unexcavated soil body 1 through the grouting pipe 32 and the hollow anchor rod 35 by the concrete mixer 3, thereby forming the reinforced concrete 12, after the grouting head 33 is removed from the bottom of the hollow anchor rod 35, the limiting bolt 36 is lowered and threadedly connected to the bottom of the hollow anchor rod 35, thereby avoiding the backflow of the concrete from the bottom of the hollow anchor rod 35, at this time, the grouting mechanism and the supporting mechanism are removed, when the reinforced concrete 12 and the concrete in the inside of the hollow anchor rod 35 solidify, the segment body 11 is limited by the hollow anchor rod 35 and the limiting bolt 36, thereby realizing the reinforcement of the segment body 11, the reinforcement mechanism ensures the normal operation of the existing line, and also avoids the ground settlement in the later construction period.
Claims
1. A construction of a shield segment reinforcing structure near an existing line, comprising an existing tunnel and a new tunnel, and unexcavated soil bodies on the existing tunnel and the new tunnel, characterized in that: The new tunnel is provided with a segment body, which is arranged at the bottom of the unexcavated soil body, and a support mechanism and a grouting mechanism are arranged on the surface of the new tunnel, the support mechanism comprises a mounting plate arranged on the surface of the new tunnel, mounting bolts are arranged on the surface of the mounting plate, a support frame is fixedly connected to the surface of the mounting plate, a top plate is fixedly connected to the surface of the support frame, a hydraulic cylinder is fixedly connected to the surface of the top plate, a support block is fixedly connected to the piston rod of the hydraulic cylinder, the grouting mechanism comprises a concrete mixing tank arranged on the surface of the new tunnel, a grouting machine body is arranged on the output end of the concrete mixing tank, a grouting pipe is connected to the output end of the grouting machine body, a grouting head is fixedly connected to the end of the grouting pipe away from the grouting machine body, a threaded pipe is fixedly connected to the surface of the grouting head, a hollow anchor rod is threadedly connected to the surface of the threaded pipe, the hollow anchor rod is connected to the segment body through perforation, and a limiting bolt is threadedly connected to the surface of the hollow anchor rod, and the grouting mechanism constructs reinforced concrete inside the unexcavated soil body.
2. The reinforced shield segment structure for construction adjacent to an existing line according to claim 1, characterized in that: A plurality of groups of grouting holes are formed in the surface of the segment body, and the grouting holes of the segment body and the support mechanism are distributed in a staggered manner.
3. The reinforced shield segment for construction adjacent to an existing line according to claim 1, characterized in that: The hollow anchor rod is connected to the grouting hole of the segment body through perforation, and the hollow anchor rod is inserted into the bottom of the unexcavated soil body through the segment body.
4. The reinforced structure of a shield segment for construction near an existing line according to claim 3, characterized in that: The mounting plate is mounted on the new tunnel through the mounting bolts, the mounting plate supports the top plate through the mounting bolts, the top plate has an arc shape, and a plurality of hydraulic cylinders are arranged on the top plate.
5. The reinforced structure of a shield segment for construction near an existing line according to claim 4, characterized in that: The hydraulic cylinder drives the support block to rise and fall through the piston rod, the support block is connected to the bottom of the segment body in a contact manner, and the top plate supports the segment body through the hydraulic cylinder and the support block.
6. The reinforced structure of a shield segment for construction near an existing line according to claim 1, characterized in that: The concrete mixing tank delivers concrete to the grouting pipe through the grouting machine body, the grouting pipe delivers concrete to the inside of the unexcavated soil body through the grouting head and the hollow anchor rod, and the concrete forms reinforced concrete inside the unexcavated soil body.
7. The reinforced shield segment for construction adjacent to an existing line according to claim 1, characterized in that: The bottom of the hollow anchor rod is provided with an internal thread, the grouting head is threadedly connected to the bottom of the hollow anchor rod through the threaded pipe, and the limiting bolt is threadedly connected to the bottom of the hollow anchor rod after the reinforced concrete is formed.