CN109736842A - The construction method in foundation-free residential house area is passed through in a kind of slurry shield reduction disturbance - Google Patents

The construction method in foundation-free residential house area is passed through in a kind of slurry shield reduction disturbance Download PDF

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CN109736842A
CN109736842A CN201910019280.3A CN201910019280A CN109736842A CN 109736842 A CN109736842 A CN 109736842A CN 201910019280 A CN201910019280 A CN 201910019280A CN 109736842 A CN109736842 A CN 109736842A
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building
grouting
slurry
shield
mud
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CN109736842B (en
Inventor
许维青
翟志国
李义华
陈强
唐伟
王乐明
苏清贵
古艳旗
李强
刘柳
何博
王康乐
李萍
张华�
高佳
邓业华
杨振朋
莫松
李斌
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China Railway Tunnel Group Erchu Co Ltd
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China Railway Tunnel Group Erchu Co Ltd
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Abstract

The construction method in foundation-free residential house area is passed through in a kind of slurry shield reduction disturbance, the construction method includes that building detection assessment, badly damaged room carry out Deep space tracking grouting and reinforcing, pass through that preceding preparation, the setting of parameters in crossing process, grouting and reinforcing and monitoring measurement control six steps in hole, disturbance when passing through foundation-free residential house area present invention reduces slurry shield according to above-mentioned six steps to building, both the normal construction of slurry shield had been ensure that, the installation security in turn ensuring foundation-free residential house area has extensive directive significance to this field construction.

Description

The construction method in foundation-free residential house area is passed through in a kind of slurry shield reduction disturbance
Technical field
The invention belongs to tunneling shield technical field of construction, especially a kind of slurry shield reduces disturbance and passes through the foundation-free people The construction method in room area.
Background technique
In slurry shield work progress, some foundation differences that can not be migrated of shield crossing can be often faced even without base The residential house area of plinth, conventional shield driving mode can have the following problems:
1, the house damage situations, house quantity in foundation-free residential house area are not verified in advance, blindly pass through that there may be very big Security risk;
2, corresponding reinforcement measure is not done for the badly damaged room on ground surface, increases and passes through risk;
3, shield is not ready work before passing through, and is possible to stop caused by because of the problems such as personnel, equipment in crossing process Machine extends crossing time, increases construction risk coefficient;
4, shield is in crossing process, mud hydraulic pressure, mud parameter, and the setting of boring parameter is unreasonable, so that cutterhead pair The cutting of development end, mud make earth's surface generation biggish differential settlement the erosion damage soil stabilization structure of development end It generates crack at footless residential house even to cause to collapse, there is very big security risk, especially diameter is more than 10 meters big Shield is even more the risk for having aggravated to pass through;
5, conventional synchronous grouting mode can only accomplish to fill gap of the section of jurisdiction behind between soil layer, unavoidable earth's surface There is biggish sedimentation, is not able to satisfy requirement of the foundation-free residential house for ground settlement;
6, to the deficiency of the monitoring measurement in ground room area, lead to that its situation of change cannot be grasped in time, increase and pass through wind Danger.
So far, the construction method that foundation-free residential house area is passed through in slurry shield reduction disturbance yet there are no relevant report.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of slurry shields to reduce the construction party that foundation-free residential house area is passed through in disturbance Method, the construction method can reduce disturbance when slurry shield passes through foundation-free residential house area to building, both ensure that slurry shield Normal construction, in turn ensure the installation security in foundation-free residential house area.
For achieving the above object, the present invention adopts the following technical scheme:
The construction method in foundation-free residential house area is passed through in a kind of slurry shield reduction disturbance, which includes building detection Assessment, badly damaged room carry out Deep space tracking grouting and reinforcing, pass through preceding preparation, the setting of parameters in crossing process, Grouting and reinforcing and monitoring measurement control six steps in hole, it is characterized in that:
I, building detection is assessed: to avoid shadow caused by the normal use and safety of the building construction of tunnel top and structures Ring or damage, entrust professional building safety evaluation department to along slurry shield tunnel construction ground building building safety, draw The ground building damage risen and deformation carry out testing and evaluation, and testing and evaluation mainly includes house field research, house Structural plan arrangement is drawn, building damage detects, house status perpendicularity deviation detection, Evaluating Building Fine-demage Grades, house knot Structure allows relative settlement limit value to carry out calculating analysis again;
It is reported according to above-mentioned testing and evaluation, according to same standard, same project and same assessment method, and according to house Structure, the intact or damaged condition for fitting up each project of component part divide house damage grade, and house is damaged to be divided into four etc. Grade is i.e. serious, general, basic and intact, sets up difference settlement control standard, badly damaged room difference respectively according to four grades The relative settlement value of settlement Control standard is limited to 0mm, and the general relative settlement value for damaging room difference settlement control standard limits Relative settlement value for 3~5mm, basic or intact room difference settlement control standard is limited to 6~10mm;
II, badly damaged room carry out Deep space tracking grouting and reinforcing: badly damaged premises face tracing compensation and grouting is using pre-buried Mini-valve tube delamination pour slurry reinforces engineering method, first digs exploratory trench when reinforcing engineering method using pre-buried mini-valve tube delamination pour slurry and verifies underground utilities position It sets, geological drilling rig pore-forming, installation mini-valve tube, finally tunnels and monitor situation according to slurry shield and divide sequence slip casting;Wherein dig exploratory trench Mode is visited using excavated by manual work when verifying underground utilities position, the basis in the badly damaged room of excavation length tale quale is moved towards to excavate, be visited The control of slot excavation width is controlled in 2.0m, exploratory trench cutting depth in 2.5m;Geological drilling rig pore-forming is using double drilling and along tunnel Sideline arrangement is tunneled, the array pitch control of double drilling is in 0.5m, and in 1.0m, double drilling is in for the spacing control of the adjacent drilling of every row Be staggered distribution, and each outer limb of drilling is controlled at 60~65 °, and each drilling is also injected hole;It is when installation mini-valve tube such as badly damaged Then mini-valve tube length should be deep at tunnel upper 5m when room is in tunnel upper, when such as badly damaged room is in tunnel side Then mini-valve tube should be deep at tunnel subsidence curve or less 2m, and each injected hole is each equipped with corresponding mini-valve tube;Divide sequence slip casting When, cement slurry and waterglass are injected the slip casting aperture in 1: 1 ratio and by tee tube, waterglass using 10~ 20 ° of B é, the proportion of the cement slurry is: water: cement=1: 1, dual slurry is formed in mini-valve tube, at this time when the initial set of dual slurry Between be adjusted according to mini-valve tube length, geological condition, grouting pressure should control within 1.0MPa;
III, it passes through preceding preparation: first working out special construction plan before slurry shield passes through foundation-free residential house area, And management and owner are reported after being expounded through peer review, then tell somebody what one's real intentions are book according to the above-mentioned special construction plan establishment technique of examination & approval, and It organizes all project manager and construction personnel to confide a technological secret and professional training, coordinated monitoring is additionally answered to measure people Member, committee, village cooperation personnel, emergency rescue personnel shift to an earlier date in place, it is ensured that construction personnel and technical guarantee personnel are sufficient during passing through; A shield is carried out before slurry shield reaches foundation-free residential house area to shut down, and carries out the inspection of warehouse entry cutter or replacement, shield with pressure Machine and corollary equipment maintenance, Slurry treatment system overhaul, it is ensured that shield machine is in good shape when passing through foundation-free residential house area State is to avoid shutting down halfway;
The setting of parameters in IV, crossing process:
(1) mud hydraulic pressure control: shield machine tunnel when notch mud hydraulic pressure should between calculated value bound, The calculated value is the sum of shield machine present position Water And Earth Pressures, and makes corresponding tune according to the geological conditions in badly damaged room It is whole, correspond to the fluctuation that development end mud hydraulic pressure should be minimized when adjustment;In tunneling process slurry shield excavation contour line with Packing material is filled between shield shell, packing material includes gram mud effect and permanent shield mud, keeps slurry shield driving steady and ground disturbance It controls minimum;To reduce disturbance of the pressure oscillation to development end soil layer, when shield machine promotes, recoils and bypasses three condition switching Mud hydraulic pressure deviation control in ± 0.05bar;
(2) shield machine boring parameter controls: in every normal tunneling process of ring, driving speed value should keep homeostasis as far as possible, subtract Few fluctuation should be adjusted gradually when adjusting driving speed to guarantee mud hydraulic pressure stabilization and into the unimpeded of discharge pipe, avoid tunneling Velocity jump causes shock vibration to stratum and causes mud hydraulic pressure swing excessive, and the speed of driving speed must satisfy every ring pick Into the requirement of synchronous grouting amount, guarantee that synchronous grouting system is in good working state always, driving speed must be infused when choosing Meaning is matched with geological conditions, avoids speed selection is improper from causing improper damage and tunnel perimeter to cutter head of shield machine and cutter Soil disturbance is excessive, and to reduce disturbance of the cutterhead to stratum, cutterhead revolving speed is controlled in 1.0~1.1r/min;
(3) mud parameter controls: according to the different soil bodys, mud adjusts specific gravity, viscosity, sand factor, bleed as needed Amount and pH value, become a kind of plastic fluid, according to the buried depth in tunnel and ground monitoring situation adjust in time mud pressure and Mud balance and viscosity make mud index be constantly in optimum state, while guaranteeing that excavation face is stablized, can be formed good Mud film;
V, grouting and reinforcing in hole:
(1) synchronous grouting control: implement synchronous grouting in time, accomplish that not slip casting is not tunneled, driving must slip casting, selection filling The cement mortar of better performances sufficiently backfills gap after the wall of section of jurisdiction, reduces surface subsidence, will be empty after polyurethane injection pipe piece ring wall Gap blocks and fixes the cement mortar on the outside of section of jurisdiction, and stratum is made larger sink will not to occur because the front and back of cement mortar is flowed Drop;
(2) secondary reinforcement slip casting: timely according to ground monitoring information during slurry shield passes through foundation-free residential house area Secondary reinforcement slip casting operation is carried out, secondary reinforcement grouting pressure should control within 0.5MPa, and grouting amount is monitored according to earth's surface to be believed It ceases with grouting pressure and determines, secondary reinforcement slip casting uses above-mentioned dual slurry;
(3) secondary deep hole grouting: according to ground monitoring situation, implement in time in the position apart from 5~10 section of jurisdiction ring of shield tail Secondary deep hole grouting process, embedment is not less than the Grouting Pipe of 3m long in advance in each injected hole in secondary deep hole grouting process, infuses Pressure control is starched within 1.0MPa, grouting amount should determine that secondary deep hole grouting is still according to earth's surface monitoring information and grouting pressure Using above-mentioned dual slurry;
VI, monitoring measurement control: pass through foundation-free residential house area main monitoring project be building settlement, relative settlement, Building inclination and building tear, wherein building settlement, relative settlement are required test item, and building inclination and building are split Seam is selective-test item, and selective-test item is subject to badly damaged room;
Building's Subsidence Survey point is laid on external wall of house or load-bearing pillar and is located at the main zone of influence, between external wall of house Away from one Building's Subsidence Survey point of setting, load-bearing pillar at 10~15m every 2 settings one Building's Subsidence Survey point, room Building's Subsidence Survey point is arranged at the greatly different building of height, is new and old for setting Building's Subsidence Survey point in room exterior wall corner Building's Subsidence Survey point, different structure are set at building junction setting Building's Subsidence Survey point, building deformation seam Building's Subsidence Survey point, different basis reasons depths are set at boundary setting Building's Subsidence Survey point, foundation Building's Subsidence Survey point is set, Building's Subsidence Survey point is set at chimney, Building's Subsidence Survey point, height are set at water tower Building's Subsidence Survey point is set at piezoelectricity tower, and each Building's Subsidence Survey point is no less than three;
Relative settlement monitoring point is poor in the monitoring data of same place different times according to above-mentioned Building's Subsidence Survey point Depending on value;
Building inclination monitoring point should be corresponded at the top of housing structure, above and below bottom by group setting and in main house body Middle part increases building inclination monitoring point, and every solitary building inclination monitoring quantity is no less than two groups, and every group of monitoring point is no less than Two;
Building tear monitoring point should respectively be split according to the distributing position of building cracks, trend, length, width, faulting of slab ends analysis Property, producing cause and the development trend of seam, choosing stress or the larger position of stress variation is building tear monitoring point, is respectively built Object Crack Monitoring point is built at least to be arranged two and be separately positioned on crack two sides and its line should be perpendicular to fracture strike.
Due to using technical solution as described above, the present invention generates following good effect:
1, the present invention can solve the problems, such as that background technique is proposed, foundation-free residential house area is smoothly passed through for slurry shield and is provided Technology guarantee, is especially reduction of the disturbance to badly damaged room, and the present invention has extensive directive significance to this field.
2, building detection assessment and monitoring measurement can provide reliable data for shield-tunneling construction personnel and support.
3, passing through preliminary preparation ensure that shield function smoothly passes through foundation-free residential house in terms of personnel, machinery two Area avoids to shut down to bring because of midway and passes through risk.
4, badly damaged room carries out that Deep space tracking grouting and reinforcing, grouting and reinforcing reduces the disturbance on stratum in hole, ensure that The stability on stratum in shield machine crossing process.
5, mud hydraulic pressure control, the control of shield machine boring parameter, mud parameter control are that slurry shield is suitable in crossing process Benefit passes through foundation-free residential house area and provides technical support.
Specific embodiment
The present invention is the construction method that a kind of slurry shield reduces that foundation-free residential house area is passed through in disturbance, is that slurry shield is smooth It passes through foundation-free residential house area and provides technology guarantee, there is extensive directive significance to this field construction.
Construction method of the invention is referring to the technical solution, other not described parts routinely slurry shield construction technology mark Standard execute, do not repeat separately, although present invention is generally directed to be badly damaged room, be also applicable to general, basic, intact room 's.
Below with reference to the technical solution, the invention will be further described.
First before slurry shield passes through foundation-free residential house area, professional building safety evaluation department to be asked to do residential house area Building detection assessment carries out grade classification according to same standard to all houses according to assessment result, can be divided according to damage situations Seriously, generally, substantially, intact four grades.
Secondly Deep space tracking grouting and reinforcing is carried out to badly damaged room, first hand excavation verifies underground utilities and carries out mark Note, the method then reinforced using pre-buried mini-valve tube delamination pour slurry, pressure injection cement-sodium silicate double liquid.
Furthermore foundation-free residential house area preparation is passed through, including technical staff, construction personnel prepare, shield machine shuts down inspection It repairs preparation and muddy water overhaul of the equipments prepares, guarantee personnel, equipment normal operation in crossing process.
Then slurry shield controls boring parameter, mud index and mud hydraulic pressure in crossing process.
Finally in crossing process, synchronous progress stratum consolidation measure in hole, including synchronous grouting, secondary grouting are secondary Deep hole grouting strengthening stratum reduces surface subsidence.
During slurry shield passes through foundation-free residential house area, monitoring measurement is synchronous to be carried out, and monitoring data real-time update is mud Water quality structure, which safe and smooth can pass through, provides accurate data support.

Claims (1)

1. a kind of slurry shield reduces the construction method that foundation-free residential house area is passed through in disturbance, which comments comprising building detection Estimate, badly damaged room carries out Deep space tracking grouting and reinforcing, passes through preceding preparation, the setting of parameters, hole in crossing process Interior grouting and reinforcing and monitoring measurement control six steps, it is characterized in that:
I, building detection is assessed: for avoid caused by the normal use and safety of the building construction of tunnel top and structures influence or Damage entrusts professional building safety evaluation department to the ground building building safety, caused along slurry shield tunnel construction Ground building damage and deformation carry out testing and evaluation, and testing and evaluation mainly includes house field research, building structure Horizontal layout drafting, building damage detection, house status perpendicularity deviation detection, Evaluating Building Fine-demage Grades, building structure Relative settlement limit value is allowed to carry out calculating analysis again;
It is reported according to above-mentioned testing and evaluation, according to same standard, same project and same assessment method, and according to house knot Structure, the intact or damaged condition for fitting up each project of component part divide house damage grade, and house is damaged to be divided into four grades It is i.e. serious, general, basic and intact, difference settlement control standard is set up respectively according to four grades, and badly damaged room difference is heavy The relative settlement value of drop control standard is limited to 0mm, and the general relative settlement value for damaging room difference settlement control standard is limited to 3 The relative settlement value of~5mm, basic or intact room difference settlement control standard are limited to 6~10mm;
II, badly damaged room carry out Deep space tracking grouting and reinforcing: badly damaged premises face tracing compensation and grouting uses pre-buried sleeve valve Pipe delamination pour slurry reinforce engineering method, using pre-buried mini-valve tube delamination pour slurry reinforce engineering method when first dig exploratory trench verify underground utilities position, Geological drilling rig pore-forming, installation mini-valve tube, production sleeve shell material and concrete only starch disk, finally tunnel and monitor feelings according to slurry shield Condition divides sequence slip casting;It wherein digs and mode is visited using excavated by manual work when exploratory trench verifies underground utilities position, excavation length tale quale seriously damages The basis in bad room is moved towards to excavate, and the control of exploratory trench excavation width is controlled in 2.0m, exploratory trench cutting depth in 2.5m;Geological drilling rig pore-forming It arranges using double drilling and along tunnel piercing sideline, the control of the array pitch of double drilling is in 0.5m, the spacing of the adjacent drilling of every row Control is controlled in the distribution that is staggered, each outer limb of drilling at 60~65 ° in 1.0m, double drilling, and each drilling is also injected hole;Peace Mini-valve tube length should be deep at tunnel upper 5m if when badly damaged room is in tunnel upper when filling mini-valve tube, such as serious Then mini-valve tube should be deep at tunnel subsidence curve or less 2m when being in tunnel side in damage room, and each injected hole is each equipped with pair The mini-valve tube answered;When production sleeve shell material and concrete only starch disk, sleeve shell material is according to the diameter of mini-valve tube and by the iron sheet side of being fabricated to Sleeve shell material is inserted in mini-valve tube upper end by shape, and in the upper end of sleeve shell material, connection concrete only starches disk, and concrete Zhi Jiang disk center is reserved Slip casting aperture;When dividing sequence slip casting, cement slurry and waterglass in 1: 1 ratio and are injected into the slip casting aperture by tee tube Interior, waterglass uses 10~20 ° of B é, and the proportion of the cement slurry is: water: cement=1: 1, dual slurry is formed in mini-valve tube, The presetting period of dual slurry is adjusted according to mini-valve tube length, geological condition at this time, grouting pressure should control 1.0MPa with It is interior;
III, it passes through preceding preparation: first working out special construction plan before slurry shield passes through foundation-free residential house area, and pass through Management and owner are reported after being expounded through peer review, and are then told somebody what one's real intentions are book according to the above-mentioned special construction plan establishment technique of examination & approval, and organize All project managers and construction personnel confide a technological secret and professional training, additionally answer coordinated monitoring measure personnel, Committee, village cooperation personnel, emergency rescue personnel shift to an earlier date in place, it is ensured that construction personnel and technical guarantee personnel are sufficient during passing through;In mud Shield is carried out before water arrival foundation-free residential house area to shut down, carry out the inspection of warehouse entry cutter or replacement with pressure, shield machine and Corollary equipment maintenance, Slurry treatment system overhaul, it is ensured that when passing through foundation-free residential house area shield machine it is in shape with Midway is avoided to shut down;
The setting of parameters in IV, crossing process:
(1) mud hydraulic pressure controls: notch mud hydraulic pressure when shield machine tunnels should be between calculated value bound, the reason It is the sum of shield machine present position Water And Earth Pressures by calculated value, and corresponding adjustment is made according to the geological conditions in badly damaged room, The fluctuation of development end mud hydraulic pressure should be minimized when corresponding adjustment;Slurry shield excavation contour line and shield shell in tunneling process Between fill packing material, packing material includes gram mud effect and permanent shield mud, makes that slurry shield driving is steady and ground disturbance controls To minimum;To reduce disturbance of the pressure oscillation to development end soil layer, shield machine promotes, recoils and bypasses mud when three condition switching Water pressure deviation is controlled in ± 0.05bar;
(2) shield machine boring parameter controls: in every normal tunneling process of ring, driving speed value should keep homeostasis as far as possible, reduce wave It is dynamic, to guarantee mud hydraulic pressure stabilization and into the unimpeded of discharge pipe, it should gradually be adjusted when adjusting driving speed, avoid driving speed Mutation causes shock vibration to stratum and causes mud hydraulic pressure swing excessive, and it is same that the speed of driving speed must satisfy every ring driving Walk the requirement of grouting amount, guarantee that synchronous grouting system is in good working state always, driving speed must be noted that when choosing with Geological conditions matching avoids speed selection is improper from causing improper damage and the tunnel perimeter soil body to cutter head of shield machine and cutter Excessive disturbance for reduction cutterhead to stratum is disturbed, cutterhead revolving speed is controlled in 1.0~1.1r/min;
(3) mud parameter control: according to the different soil bodys, mud adjust as needed specific gravity, viscosity, sand factor, condensate rate and PH value, becomes a kind of plastic fluid, adjusts mud pressure and mud in time according to the buried depth in tunnel and ground monitoring situation Specific gravity and viscosity make mud index be constantly in optimum state, while guaranteeing that excavation face is stablized, can form good mud Film;
V, grouting and reinforcing in hole:
(1) synchronous grouting control: implement synchronous grouting in time, accomplish that not slip casting is not tunneled, driving must slip casting, select filling capacity Preferable cement mortar sufficiently backfills gap after the wall of section of jurisdiction, reduces surface subsidence, gap after polyurethane injection pipe piece ring wall is sealed The cement mortar on the outside of section of jurisdiction is blocked up and fixed, stratum is made larger sedimentation will not to occur because the front and back of cement mortar is flowed;
(2) it secondary reinforcement slip casting: during slurry shield passes through foundation-free residential house area, is carried out in time according to ground monitoring information Secondary reinforcement slip casting operation, secondary reinforcement grouting pressure should control within 0.5MPa, grouting amount according to earth's surface monitoring information and Grouting pressure determines that secondary reinforcement slip casting uses above-mentioned dual slurry;
(3) secondary deep hole grouting: according to ground monitoring situation, implement in time in the position apart from 5~10 section of jurisdiction ring of shield tail secondary Deep hole grouting process, embedment is not less than the Grouting Pipe of 3m long, slip casting pressure in advance in each injected hole in secondary deep hole grouting process Power controls within 1.0MPa, and grouting amount should determine that secondary deep hole grouting is still used according to earth's surface monitoring information and grouting pressure Above-mentioned dual slurry;
VI, monitoring measurement control: the main monitoring project for passing through foundation-free residential house area is building settlement, relative settlement, building Object inclination and building tear, wherein building settlement, relative settlement are required test item, and building inclination and building tear are Selective-test item, selective-test item are subject to badly damaged room;
Building's Subsidence Survey point is laid on external wall of house or load-bearing pillar and is located at the main zone of influence, along external wall of house spacing 10 One Building's Subsidence Survey point, load-bearing pillar are set at~15m every outside 2 settings, one Building's Subsidence Survey point, house Wall corner is arranged Building's Subsidence Survey point, Building's Subsidence Survey point, new and old building is arranged at the greatly different building of height Building's Subsidence Survey point, different structure boundary are set at object junction setting Building's Subsidence Survey point, building deformation seam Building's Subsidence Survey point, the depths setting of different basis reasons are set at place's setting Building's Subsidence Survey point, foundation Building's Subsidence Survey point is set at Building's Subsidence Survey point, chimney, Building's Subsidence Survey point, high-voltage electricity are set at water tower Building's Subsidence Survey point is set at tower, and each Building's Subsidence Survey point is no less than three;
Relative settlement monitoring point according to above-mentioned Building's Subsidence Survey point in the monitoring data difference of same place different times and It is fixed;
Building inclination monitoring point should be corresponded at the top of housing structure, above and below bottom by group setting and in the middle part of main house body Increase building inclination monitoring point, every solitary building inclination monitoring quantity is no less than two groups, and every group of monitoring point is no less than two;
Building tear monitoring point should analyze each crack according to the distributing position of building cracks, trend, length, width, faulting of slab ends Property, producing cause and development trend, choose stress or the larger position of stress variation is building tear monitoring point, each building Crack Monitoring point is at least arranged two and is separately positioned on crack two sides and its line should be perpendicular to fracture strike.
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CN110130936A (en) * 2019-06-06 2019-08-16 中铁十一局集团城市轨道工程有限公司 It dashes forward in a kind of shield tunneling process and meets the construction method of untreated solution cavity or crack
CN110529147A (en) * 2019-06-28 2019-12-03 中铁四局集团第五工程有限公司 It is a kind of to utilize the Subway Tunnel construction method that pedestrian passage is worn under cantilever excavator
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CN113373901A (en) * 2021-05-27 2021-09-10 中建一局集团建设发展有限公司 Overlapping shield tunnel house foundation reinforcing structure next to house and construction method

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CN110130936A (en) * 2019-06-06 2019-08-16 中铁十一局集团城市轨道工程有限公司 It dashes forward in a kind of shield tunneling process and meets the construction method of untreated solution cavity or crack
CN110529147A (en) * 2019-06-28 2019-12-03 中铁四局集团第五工程有限公司 It is a kind of to utilize the Subway Tunnel construction method that pedestrian passage is worn under cantilever excavator
CN111878084A (en) * 2020-07-15 2020-11-03 中铁十八局集团有限公司 Rapid treatment method for controlling surface subsidence by using large-diameter shield construction in case of meeting stratum funnel
CN112576265A (en) * 2020-11-30 2021-03-30 中建八局轨道交通建设有限公司 Sedimentation control method for old villages penetrated by shield
CN113373901A (en) * 2021-05-27 2021-09-10 中建一局集团建设发展有限公司 Overlapping shield tunnel house foundation reinforcing structure next to house and construction method

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