CN108663271A - The horizontal load test system and method for shape of a hoof shield duct piece structural bearing capacity performance - Google Patents
The horizontal load test system and method for shape of a hoof shield duct piece structural bearing capacity performance Download PDFInfo
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- CN108663271A CN108663271A CN201810440898.2A CN201810440898A CN108663271A CN 108663271 A CN108663271 A CN 108663271A CN 201810440898 A CN201810440898 A CN 201810440898A CN 108663271 A CN108663271 A CN 108663271A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
Abstract
A kind of horizontal load test system of shape of a hoof shield duct piece structural bearing capacity performance, including section of jurisdiction bearing, load longeron, armored concrete counter force wall, shaped steel counter-force column, jack, anchorage, actively by drawing steel stranded wire and passively by drawing steel stranded wire, the section of jurisdiction of assembled cyclization is provided on the section of jurisdiction bearing；Load ring beam is equipped on the outside of the section of jurisdiction ring, and the load ring beam is on the outside around arrangement；The load longeron setting is on the outside of load ring beam；The jack setting is on the outside of load longeron；The active that the jack is anchored by the anchorage is attached by drawing steel stranded wire and armored concrete counter force wall；The armored concrete counter force wall is arranged inside the ring of section of jurisdiction, is fixed by the shaped steel counter-force column；Outside is arranged in armored concrete counter force wall in the shaped steel counter-force column, and is connect by drawing steel stranded wire by the active that anchorage anchors with the jack；Outside is arranged in armored concrete counter force wall in the shaped steel counter-force column.
Description
Technical field
The present invention relates to shield duct piece strength performances to test field, and in particular to a kind of shape of a hoof shield duct piece structure is held
Carry the horizontal load test system and method for power performance.
Background technology
Shield duct piece is the main mounting structure of shield-tunneling construction, is the innermost layer barrier in tunnel, carries and resists soil layer pressure
The effect of power, groundwater pressure and some special loads.Shield duct piece is the permanent lining, secondary lining structure of shield tunnel, shield pipe
Tablet quality is directly related to the total quality and safety in tunnel, influences the water resistance and endurance quality in tunnel.
The detail characteristic that structure is built to section of jurisdiction can be more really realized for the experiment of shield tunnel prototype segment liner structure
And the test of the mechanical characteristics such as structural-load-carrying capacity, unstability, destructive characteristics.Therefore, preferably carry out prototype tube in the case of conditions permit
Piece builds experiment, to verify the mechanical property of domain prototype segment liner structure.As a whole, very due to prototype structure experiment cost
Greatly, the test period is long, and is easily interfered by external environment, and the difficulty of experiment is big, therefore shield tunnel segment lining knot both at home and abroad
The prototype test development of structure is simultaneously few, and the prototype test and research for big cross section shape of a hoof shield tunnel is even more for the first time.
It is horizontal that previous shield duct piece prototype load testing machine has vertical also the having of use to use, and many is round tube
Piece does not set counter force wall, is carried out according to symmetry to drawing, and almost without out-of-balance force, most of counter force wall is located on the outside of structure, is used
Steel construction presses under jack effect, but the mode that counter force wall acts on the outside, since structure size is big, stress and
Material utilization amount is also big, and economy is bad.Therefore, there is an urgent need to invent one kind minimizing counter-force wall size, cost saves, load system
It is convenient that construction in a systematic way is made, and material utilization amount is few, simple installation, repeats and utilizes, section of jurisdiction uniform force, and being capable of more true simulation reality
The loading system of the tunnel segment structure strength performance experiment of border load.
Invention content
In view of the deficiencies of the prior art, the present invention proposes a kind of shape of a hoof shield duct piece structural bearing capacity performance test is horizontal
Load test system and method, wherein the horizontal load test system of shape of a hoof shield duct piece structural bearing capacity performance test is specific
Technical solution is as follows：A kind of horizontal load test system of shape of a hoof shield duct piece structural bearing capacity performance, including section of jurisdiction bearing
(10), load longeron (7), load ring beam (8), armored concrete counter force wall (1), shaped steel counter-force column (4), jack (5), anchorage
(6), actively by drawing steel stranded wire (2) and passively by drawing steel stranded wire (3), it is characterised in that：It is provided on the section of jurisdiction bearing (10)
The section of jurisdiction (9) of assembled cyclization；
Load ring beam (8) is distributed on the outer circumference surface of the section of jurisdiction (9)；
Load longeron (7) setting is on the outside of load ring beam (8)；
Jack (5) setting is on the outside of load longeron (7)；
The active that the jack (5) is anchored by the anchorage (6) is by drawing steel stranded wire (2) and armored concrete counter force wall
(1) it is attached；
The armored concrete counter force wall (1) is arranged in the section of jurisdiction (9) of annular, solid by the shaped steel counter-force column (4)
It is fixed；
Described to be passively threaded through on armored concrete counter force wall (1) by drawing steel stranded wire (3), this is passively by drawing steel stranded wire (3)
The outer circumference surface of armored concrete counter force wall (1) is stretched out at both ends respectively, is anchored by anchorage (6), to armored concrete counter force wall
(1) it is constrained.
Wherein, the concrete scheme of the horizontal load test method of shape of a hoof shield duct piece structural bearing capacity performance test is as follows：
Using following steps,
Step 1：The horizontal assembly of section of jurisdiction (9) is carried out first on section of jurisdiction bearing (10), and is adjusted, and ensures load
Point preformed hole corresponding to armored concrete counter force wall (1) is aligned, and ensures that both sides of the face are smooth up and down, and tip side face paste is closed,
Without faulting of slab ends；
Step 2：Arrangement load ring beam (8) is wrapped around in cricoid section of jurisdiction (9), is divided to two rings up and down, away from section of jurisdiction (9)
The distance of lower edge is 1/4 section of jurisdiction (9) breadth, ensures that load ring beam (8) is fitted closely with section of jurisdiction (9)；
Step 3：The arrangement load longeron (7) on the outside of load ring beam (8)；
Step 4：It wears actively by drawing steel stranded wire (2), first, in armored concrete counter force wall (1), preformed hole wears active tension
Steel strand wires (2), and being anchored with anchorage (6) in the armored concrete counter force wall (1), then sequentially pass through load longeron (7),
Jack (5), and anchored on the outside of jack (5)；It penetrates passively by drawing steel stranded wire (3), and in armored concrete counter-force
It is anchored on the outside of wall (1), and carries out tensioning；
Step 5：It arranges, paste corresponding sensor；
Step 6：Apply corresponding power using each group jack (5), i.e., section of jurisdiction (9) is loaded, then to each index
It is tested, is recorded, until being loaded into tunnel segment structure destruction；So far the test to tunnel segment structure strength performance is just completed.
The invention is realized in this way the horizontal assembly of section of jurisdiction (9) is carried out on section of jurisdiction bearing (10), and by section of jurisdiction (9)
Assembled cyclization, is adjusted, and ensures that load(ing) point preformed hole corresponding to armored concrete counter force wall (1) is aligned, and ensure up and down
Both sides of the face are smooth, and tip side face paste is closed, no faulting of slab ends；Load ring beam (8), the loaded ring are disposed on the outside of cricoid section of jurisdiction (9)
Beam (8) wraps around arrangement in section of jurisdiction (9), is divided to two rings up and down, and the distance away from section of jurisdiction (9) lower edges is 1/4 section of jurisdiction breadth,
Ensure that load ring beam (8) is fitted closely with section of jurisdiction (9)；Load arrangement load longeron (7) on the outside of ring beam (8)；Wearing active tension
When steel strand wires (2), first, worn actively by drawing steel stranded wire in armored concrete counter force wall (1) preformed hole, and anti-in armored concrete
It is anchored with anchorage (6) in power wall (1), thousand for then sequentially passing through load longeron (7) and being arranged on the outside of load longeron (7)
Jin top (5), and anchored on the outside of jack (5)；It is penetrated again passively by drawing steel stranded wire (3), and in armored concrete counter-force
It is anchored on the outside of wall (1), and carries out a degree of tensioning；Then corresponding sensor is arranged or pasted, each group thousand is utilized
Jin top (5) applies corresponding power, i.e., loads to section of jurisdiction (9), then test each index, records, until being loaded into
Tunnel segment structure destroys；So far the test to tunnel segment structure strength performance is just completed.
To better implement the present invention, it may further be：The step 4：Active is mixed in reinforcing bar by drawing steel stranded wire (2)
Part in solidifying soil counter force wall (1) is anchored with anchorage (6), and the active of rest part is by drawing steel stranded wire (2) to through reinforcing bar
On the outside of concrete counter force wall (1), anchorage (6) is used in combination to be anchored.The load test is surveyed using superior technique scheme
Examination.
The active is anchored by part of the drawing steel stranded wire (2) on the inside of armored concrete counter force wall (1), rest part
To being anchored through armored concrete counter force wall (1) outside.The pulling force that armored concrete counter force wall (1) is born is as far as possible
It is converted into pressure, has given full play to the mechanical property of concrete material, improves the bearing capacity of armored concrete counter force wall (1).
The load ring beam (8) is uniformly distributed on the outside of section of jurisdiction (9), and is fitted closely with section of jurisdiction (9).Keep the load vertical
Beam (7) delivers load to the load ring beam (8), and the load ring beam (8) delivers load to section of jurisdiction (9) structure, makes again
It obtains section of jurisdiction (9) structure stress to be more uniformly distributed, and the layout density of load longeron (7) can be reduced, reduce load longeron (7)
Number ensures that section of jurisdiction (9) in the case that structure is reasonable, reduce material utilization amount and cost.
The present invention provides a kind of simple and efficient loading scheme in the test of tunnel segment structure strength performance, and existing
Section of jurisdiction strength performance experimental test technology is compared, and the advantage is that：Simple in structure, construction is more quick；The knot of counter-force is provided
Structure is small, and material utilization amount is few, and the repeatable utilization of loading system, reduces experimentation cost；Built in counter force wall so that required examination
Space is tested to greatly reduce；Passively counter force wall is constrained by drawing steel stranded wire so that in the case where ensureing that counter force wall is firm, further
Material utilization amount is reduced, cost is reduced；Steel strand wires pass through on the outside of section of jurisdiction, are not required to drill to section of jurisdiction, avoid and weaken section of jurisdiction
Intensity；Different distributions load, and section of jurisdiction uniform force, more closing to reality force-bearing situation can be simulated.
Description of the drawings
Fig. 1 is that integral planar of the present invention arranges the first specific implementation mode structure chart.
Fig. 2 is that integral planar of the present invention arranges another specific implementation mode structure chart.
Fig. 3 is the schematic cross-section of the first specific embodiment of loading system of the present invention.
Fig. 4 is the schematic cross-section of loading system another kind specific embodiment of the present invention.
Fig. 5 is the structural schematic diagram of present invention load longeron.
Fig. 6 is the structural schematic diagram of present invention load ring beam.
Specific implementation mode
The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
As shown in Figures 1 to 6：A kind of horizontal load test system of shape of a hoof shield duct piece structural bearing capacity performance, including pipe
Piece bearing 10, load longeron 7, load ring beam 8, armored concrete counter force wall 1, shaped steel counter-force column 4, jack 5, anchorage 6, active
By drawing steel stranded wire 2 and passively by drawing steel stranded wire 3, it is characterised in that：The section of jurisdiction of assembled cyclization is provided on the section of jurisdiction bearing 10
9；Load ring beam 8 is distributed on the outer circumference surface of the section of jurisdiction 9；The setting of load longeron 7 is in 8 outside of load ring beam；It is described
The setting of jack 5 is in 7 outside of load longeron；The active that the jack 5 is anchored by the anchorage 6 is by drawing steel stranded wire 2 and steel
Reinforced concrete counter force wall 1 is attached；The armored concrete counter force wall 1 is arranged inside the section of jurisdiction 9 of annular, passes through the type
Steel counter-force column 4 is fixed；The setting of shaped steel counter-force column 4 outside in armored concrete counter force wall 1；It is described passively by drawing steel stranded wire
3 are threaded through on armored concrete counter force wall 1, this is passively stretched out the outer of armored concrete counter force wall 1 respectively by 3 both ends of drawing steel stranded wire
Periphery is anchored by anchorage 6, is constrained armored concrete counter force wall 1；The step 4：By active by drawing steel stranded wire 2
Part in armored concrete counter force wall 1 is anchored with anchorage 6, and the active of rest part is by drawing steel stranded wire 2 to through steel
1 outside of reinforced concrete counter force wall, is used in combination anchorage 6 to be anchored, is tested the load test using superior technique scheme；
The active is anchored by drawing steel stranded wire 2 in the part of 1 inside of armored concrete counter force wall, and rest part is to mixed through reinforcing bar
Solidifying 1 outside of soil counter force wall is anchored, and converts the pulling force that armored concrete counter force wall 1 is born to pressure as far as possible, fully
The mechanical property for having played concrete material improves the bearing capacity of armored concrete counter force wall 1；The load ring beam 8 is along pipe
9 outside of piece is uniformly distributed, and is fitted closely with section of jurisdiction 9, and the load longeron 7 is made to deliver load to the load ring beam 8, institute
It states load ring beam 8 and delivers load to 9 structure of section of jurisdiction again so that 9 structure stress of section of jurisdiction is more uniformly distributed, and can reduce load
The layout density of longeron 7 reduces the number of load longeron 7, ensures section of jurisdiction 9 in the case that structure is reasonable, reduces material and uses
Amount and cost.
A kind of horizontal load test system of shape of a hoof shield duct piece structural bearing capacity performance is tension and compression self-balancing.
A kind of horizontal load test method of shape of a hoof shield duct piece structural bearing capacity performance, it is characterised in that：Using following
Step,
Step 1：The horizontal assembly that section of jurisdiction 9 is carried out first on section of jurisdiction bearing 10, and is adjusted, ensure load(ing) point with
1 corresponding preformed hole of armored concrete counter force wall is aligned, and ensures that both sides of the face are smooth up and down, and tip side face paste is closed, no faulting of slab ends；
Step 2：Arrangement load ring beam 8 is wrapped around in cricoid section of jurisdiction 9, is divided to two rings up and down, away from 9 lower edges of section of jurisdiction
Distance be 1/4 section of jurisdiction, 9 breadth, ensure load ring beam 8 fitted closely with section of jurisdiction 9；
Step 3：In 8 outside arrangement load longeron 7 of load ring beam；
Step 4：It wears actively by drawing steel stranded wire 2, first, wears active tension steel in 1 preformed hole of armored concrete counter force wall and twist
Line 2, and anchored with anchorage 6 in armored concrete counter force wall 1, it then sequentially passes through and loads longeron 7, jack 5, and
5 outside of jack is anchored；It penetrates passively by drawing steel stranded wire 3, and is anchored in 1 outside of armored concrete counter force wall, and
Carry out tensioning；
Step 5：It arranges, paste corresponding sensor；
Step 6：Using load, corresponding power is applied to each group jack 5, i.e., section of jurisdiction 9 is loaded, then to each
Index is tested, record；So far the test to tunnel segment structure strength performance is just completed.
The horizontal assembly of section of jurisdiction 9 is carried out on section of jurisdiction bearing 10, and by the assembled cyclization in section of jurisdiction 9, is adjusted, is ensured load
Point preformed hole corresponding to armored concrete counter force wall 1 is aligned, and ensures that both sides of the face are smooth up and down, and tip side face paste is closed, nothing
Faulting of slab ends；9 outside of cricoid section of jurisdiction is disposed with load ring beam 8, which wraps around arrangement in section of jurisdiction 9, is divided to upper and lower two
Ring, the distance away from 9 lower edges of section of jurisdiction are 1/4 section of jurisdiction breadth, ensure that load ring beam 8 is fitted closely with section of jurisdiction 9；Load ring beam
8 outside arrangement load longerons 7；When wearing actively by drawing steel stranded wire 2, scheme one：First, reserved in armored concrete counter force wall 1
Hole is worn actively by drawing steel stranded wire, and is anchored with anchorage 6 in armored concrete counter force wall 1, and it is vertical then to sequentially pass through load
Beam 7 and the jack 5 for being arranged in 7 outside of load longeron, and anchored in 5 outside of jack；Passive tension steel is penetrated again to twist
Line 3, and anchored in 1 outside of armored concrete counter force wall, and carry out a degree of tensioning；Scheme two：In reinforced concrete
1 preformed hole of native counter force wall is worn actively by drawing steel stranded wire 2, and by design scheme, part is actively anti-in armored concrete by drawing steel stranded wire 2
The inside of power wall 1 is anchored, the active of rest part by drawing steel stranded wire 2 to through 1 outside of armored concrete counter force wall, then into
Row anchors and then arranges or paste corresponding sensor, applies corresponding power using each group jack 5, i.e., adds to section of jurisdiction 9
It carries, then each index is tested, record, until being loaded into tunnel segment structure destruction；So far it just completes and tunnel segment structure is held
Carry the test of power performance.
Claims (7)
1. a kind of horizontal load test system of shape of a hoof shield duct piece structural bearing capacity performance, including section of jurisdiction bearing (10), load
Longeron (7), load ring beam (8), armored concrete counter force wall (1), shaped steel counter-force column (4), jack (5), anchorage (6), active
By drawing steel stranded wire (2) and passively by drawing steel stranded wire (3), it is characterised in that：Assembled cyclization is provided on the section of jurisdiction bearing (10)
Section of jurisdiction (9)；
Load ring beam (8) is distributed on the outer circumference surface of the section of jurisdiction (9)；
Load longeron (7) setting is on the outside of load ring beam (8)；
Jack (5) setting is on the outside of load longeron (7)；
The active that the jack (5) is anchored by the anchorage (6) is by drawing steel stranded wire (2) and armored concrete counter force wall (1)
It is attached；
The armored concrete counter force wall (1) is arranged in the section of jurisdiction (9) of annular, fixed by the shaped steel counter-force column (4)；
Described to be passively threaded through on armored concrete counter force wall (1) by drawing steel stranded wire (3), this is passively by drawing steel stranded wire (3) both ends
Respectively stretch out armored concrete counter force wall (1) outer circumference surface, by anchorage (6) anchor, to armored concrete counter force wall (1) into
Row constraint.
2. the horizontal load test system of shape of a hoof shield duct piece structural bearing capacity performance, feature exist according to claim 1
In：The active is anchored by drawing steel stranded wire (2) on the inside of the armored concrete counter force wall (1), and rest part is to through reinforcing bar
It is anchored on the outside of concrete counter force wall (1).
3. the horizontal load test system of shape of a hoof shield duct piece structural bearing capacity performance, feature exist according to claim 1
In：The load ring beam (8) is uniformly distributed on the outside of section of jurisdiction (9), and is fitted closely with section of jurisdiction (9).
4. a kind of horizontal load test method of shape of a hoof shield duct piece structural bearing capacity performance, it is characterised in that：Using following step
Suddenly,
Step 1：The horizontal assembly that section of jurisdiction (9) are carried out first on section of jurisdiction bearing (10), and is adjusted, ensure load(ing) point with
The corresponding preformed hole alignment of armored concrete counter force wall (1), and ensure that both sides of the face are smooth up and down, tip side face paste is closed, error-free
Platform；
Step 2：Arrangement load ring beam (8) is wrapped around in cricoid section of jurisdiction (9), is divided to two rings up and down, away from following on section of jurisdiction (9)
The distance of edge is 1/4 section of jurisdiction (9) breadth, ensures that load ring beam (8) is fitted closely with section of jurisdiction (9)；
Step 3：The arrangement load longeron (7) on the outside of load ring beam (8)；
Step 4：It wears actively by drawing steel stranded wire (2), first, wears active tension steel in armored concrete counter force wall (1) preformed hole and twist
Line (2), and being anchored with anchorage (6) in the armored concrete counter force wall (1) then sequentially passes through and loads longeron (7), very heavy
It pushes up (5), and is anchored on the outside of jack (5)；It penetrates passively by drawing steel stranded wire (3), and in armored concrete counter force wall (1)
Outside is anchored, and carries out tensioning；
Step 5：It arranges, paste corresponding sensor；
Step 6：Apply corresponding power using each group jack (5), i.e., section of jurisdiction (9) are loaded, then each index is carried out
Test, record, until being loaded into tunnel segment structure destruction；So far the test to tunnel segment structure strength performance is just completed.
5. a kind of horizontal load test method of shape of a hoof shield duct piece structural bearing capacity performance according to claim 4, special
Sign is：The step 4：By active by part of the drawing steel stranded wire (2) in armored concrete counter force wall (1) with anchorage (6) into
Row anchoring, the active of rest part by drawing steel stranded wire (2) to through on the outside of armored concrete counter force wall (1), be used in combination anchorage (6) into
Row anchoring.
6. a kind of horizontal load test method of shape of a hoof shield duct piece structural bearing capacity performance according to claim 4, special
Sign is：The active is anchored by part of the drawing steel stranded wire (2) on the inside of armored concrete counter force wall (1), rest part
To being anchored through armored concrete counter force wall (1) outside.
7. a kind of horizontal load test method of shape of a hoof shield duct piece structural bearing capacity performance according to claim 4, special
Sign is：The load ring beam (8) is uniformly distributed on the outside of section of jurisdiction (9), and is fitted closely with section of jurisdiction (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810440898.2A CN108663271B (en) | 2018-05-10 | 2018-05-10 | Horizontally-loaded test system and method for bearing capacity performance of horseshoe-shaped shield segment structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810440898.2A CN108663271B (en) | 2018-05-10 | 2018-05-10 | Horizontally-loaded test system and method for bearing capacity performance of horseshoe-shaped shield segment structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108663271A true CN108663271A (en) | 2018-10-16 |
| CN108663271B CN108663271B (en) | 2020-02-18 |
Family
ID=63779059
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810440898.2A Expired - Fee Related CN108663271B (en) | 2018-05-10 | 2018-05-10 | Horizontally-loaded test system and method for bearing capacity performance of horseshoe-shaped shield segment structure |
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Cited By (6)
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| CN110006641A (en) * | 2019-04-16 | 2019-07-12 | 宁波用躬科技有限公司 | Class rectangle shield duct piece horizontal pulling test loading device and loading method |
| CN110132718A (en) * | 2019-04-19 | 2019-08-16 | 同济大学 | Structure residual bearing capacity measuring method and system based on Tunnel Lining Deformation feature |
| CN110426284A (en) * | 2019-09-02 | 2019-11-08 | 西南交通大学 | A kind of large-tonnage cantilevered self-balancing plate test loading system and its implementation method |
| CN111103195A (en) * | 2019-12-24 | 2020-05-05 | 中铁高新工业股份有限公司 | Large-section horseshoe-shaped duct piece stress characteristic and structure bearing capacity test device |
| CN112129620A (en) * | 2020-09-29 | 2020-12-25 | 中铁工程装备集团有限公司 | Pipe joint loading test distribution beam, test device and test method |
| CN113378284A (en) * | 2021-08-04 | 2021-09-10 | 华东交通大学 | Design method of horseshoe-shaped shield tunnel in soil-rock composite stratum |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110006641A (en) * | 2019-04-16 | 2019-07-12 | 宁波用躬科技有限公司 | Class rectangle shield duct piece horizontal pulling test loading device and loading method |
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| CN110426284A (en) * | 2019-09-02 | 2019-11-08 | 西南交通大学 | A kind of large-tonnage cantilevered self-balancing plate test loading system and its implementation method |
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| CN112129620A (en) * | 2020-09-29 | 2020-12-25 | 中铁工程装备集团有限公司 | Pipe joint loading test distribution beam, test device and test method |
| CN113378284A (en) * | 2021-08-04 | 2021-09-10 | 华东交通大学 | Design method of horseshoe-shaped shield tunnel in soil-rock composite stratum |
| CN113378284B (en) * | 2021-08-04 | 2022-05-13 | 华东交通大学 | Design method of horseshoe-shaped shield tunnel in soil-rock composite stratum |
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| CN108663271B (en) | 2020-02-18 |
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