CN102943488A - Soft soil area large area greening non-excavation implementing underground space construction method - Google Patents
Soft soil area large area greening non-excavation implementing underground space construction method Download PDFInfo
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- CN102943488A CN102943488A CN2012104962711A CN201210496271A CN102943488A CN 102943488 A CN102943488 A CN 102943488A CN 2012104962711 A CN2012104962711 A CN 2012104962711A CN 201210496271 A CN201210496271 A CN 201210496271A CN 102943488 A CN102943488 A CN 102943488A
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Abstract
The invention discloses a soft soil area large area greening non-excavation implementing underground space construction method. The method comprises the following steps: steps one, constructing a door type pipe roof; step two, performing earth excavation and top plate pouring in the pipe roof in layered and sectioned mode, and forming a ground floor reinforced concrete structure with sealed top face, lateral faces and bottom face; step three, after the ground floor structure reaches designed strength, finishing a next-layer earth excavation, performing concrete layer pouring on two lateral walls of excavated exposed pipe roof and a bottom plate of a second floor underground structure, and completing construction of the second floor underground structure; besides, the method can further comprises a step four and circulate step three, and accordingly construction of multi-layer underground space structures is completed. The construction method greatly reduces ground deformation quantity, has the advantages of being good in ground control during construction process and having zero damage on city green land and zero influence on greening growth environment, and is particularly suitable for being used in underground space construction under built city large area greening.
Description
Technical field
The present invention relates to the Construction Technique of Underground Works field, relate in particular to the job practices that the lower non-excavation of a kind of soft clay area large tracts of land greening is implemented the underground space.
Background technology
The important embodiment that rationally utilizes urban underground space resource, adapts to urban modernization and Sustainable Development Construction with underground space common programme, the comprehensive development of large tracts of land Urban Landscape Greening and its below.But owing to reasons such as lacking planning of science activities and overall arrangement has caused the Underground Space Resource in large-scale greenery patches, built city, each metropolis of China not make the best use of everything.
Trenchless technology is a kind of important thinking that realizes underground space development under the existing large-scale greening.The typical trenchless technology of soft clay area, such as push pipe, shield structure etc. because cross dimensions restriction, multiplex in engineerings such as underground passage or cross-river tunnels, can not satisfy the requirement of urban underground space large cross section excavation, and the tunneling engineering methods such as Mining Method can't be promoted in soft clay area by the constraint of the conditions such as engineering, hydrogeology.
Pipe curtain method is large as a kind of excavated section, control is out of shape, job practices applied widely is applied in the construction of domestic and international non-excavation underground construction more and more; traditional pipe curtain method job practices mainly contains: (1) pipe curtain namely forms underground structure after the jacking perforation with the prefabricated box culvert structure forward by special installation in conjunction with the box culvert jacking under the protection of sealed tube curtain.The method requires pipe curtain complete closed, large-scale active well need be set simultaneously satisfy the needs that box culvert is prefabricated and advance, and therefore uses to be very limited; (2) pipe curtain is in conjunction with the tunneling bottom of inner support, namely under the pipe curtain protection of end face and both sides from top to bottom, with digging with the support construction to cheating the end, finishing returning of underground structure and build along building at last.The method is mainly used in the areas that geological conditions is good, groundwater table is dark such as the mountain ridge owing to vertically not establishing in addition supporting.
Therefore, those skilled in the art is devoted to develop the job practices that the lower non-excavation of a kind of soft clay area large tracts of land greening is implemented the underground space, overcomes above deficiency.
Summary of the invention
Because the above-mentioned deficiency of prior art, the present invention is that a kind of ground deformation of proposition is little, and the pipe curtain does not need complete closed, and the job practices of the lower non-excavation enforcement underground space of soft clay area large tracts of land greening of large-scale active well need be set.
For achieving the above object, the invention provides the job practices that the lower non-excavation of a kind of soft clay area large tracts of land greening is implemented the underground space, may further comprise the steps:
2.1, vertically finish forward the soil excavation of the first construction section along pipe curtain steel pipe in the inboard bight of described pipe curtain;
2.2, at described the first construction section platform place static pressure steel pipe pile as the first stand column pile;
2.3, take described the first stand column pile as supporting, form top board structure excavating the inboard sprayed mortar of the upper square tube curtain that exposes, described the first stand column pile be connected top board structure and connect jointly vertical support as upper square tube curtain;
2.4, after top board structure reaches design strength, finish the soil excavation of the second construction section, described the second construction section communicates side by side with described the first construction section;
2.5, at described the second construction section platform place static pressure steel pipe pile as the second stand column pile;
2.6, take described the second stand column pile as supporting, continue completing steps 2.3 described top board structures and excavated inboard extension of the upper square tube curtain that exposes to the second construction section and build;
2.7, loop step 2.4-2.6 successively, implement soil excavation and the top board structure of next construction section and build, until finish whole top board structures in the described pipe curtain and the excavation of the B1 structure earthwork;
2.8, the base plate of pipe curtain two side that excavation is exposed and B1 structure carries out layer of concrete and builds, and forms the B1 reinforced concrete structure of end face, side and bottom surface sealing;
Better, also comprise step 4: loop step 3, finish the construction of multi-layer underground space structures.
Better, for fore shaft connects, in described fore shaft, inject water-stop slurry between the steel pipe of described pipe curtain.
Better, described step 2 is carrying out adopting concrete to spray the groove of filling between the steel pipe at the pipe curtain inside top end face that excavation exposes before the top board structure concrete sprays, and then levelling is hung and is built one deck as the waterproof roll of described top board structure basal plane.
Better, described the first stand column pile or the second stand column pile are the steel pipe post stake that many rows vertically arrange.
Better, the soil excavation of the second construction section of described step 2.4 is the horizontal expansion earth excavation by described the first construction section.
Better, the soil excavation of described the first construction section is vertical soil excavation, described the second construction section is continued along laterally putting forward the slope excavation by described the first construction section.
Beneficial effect of the present invention is as follows:
1) the present invention adopts and adopt layer and section excavation, construction structure top board in the B1 structure, utilize simultaneously static pressure steel pipe post pile construction technique, it is creationary so that corresponding stand column pile forms ingenious the cooperation with top board structure, vertical support as the pipe curtain, greatly reduced the deflection on ground, have that the work progress ground deformation is little, not sedimentation, do not affect the ground greening, the characteristics that urban green space zero is destroyed; The present invention adopts non-enclosed gate-shape pipe curtain, and excavated section and longitudinal length are all unrestricted, and wide accommodation can finish according to functional requirement that the number of plies is not limit, the underground space development of arbitrary area;
2) underground space construction method of the present invention is applicable to construct the underground space of various structure typess for now digging cast in place process;
3) except constructing required small-sized active well of when curtain pipe, do not take any ground construction place, more need not to arrange other large-scale active wells.
In sum; when implementing the underground space, the below that this job practices is particluarly suitable for the greening of built city large tracts of land uses; under the protection that realizes existing large tracts of land greenery patches, finish the reasonable utilization of urban underground space resource, to satisfy the requirement of urban modernization and Sustainable Development Construction.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand fully purpose of the present invention, feature and effect.
Description of drawings
Fig. 1 is the job practices flow chart that the lower non-excavation of embodiment one soft clay area large tracts of land greening is implemented the underground space.
Fig. 2 is the Specific construction flow chart of steps of the step S2 among Fig. 1.
Fig. 3 is gate-shape pipe curtain schematic diagram constructed when finishing construction sequence S1.
Fig. 4 is the underground space schematic diagram when finishing construction sequence S2.2.
Fig. 5 is the underground space schematic diagram when finishing construction sequence S2.3.
Fig. 6 is the underground space schematic diagram when finishing construction sequence S2.7.
Fig. 7 is the underground space schematic diagram when finishing construction sequence S2.8.
Fig. 8 is the underground space schematic diagram when finishing construction sequence S3.
Fig. 9 is the steel pipe fore shaft syndeton schematic diagram of the present embodiment gate-shape pipe curtain.
Figure 10 is the present embodiment gate-shape pipe curtain end face partial structurtes enlarged diagrams.
The specific embodiment
As depicted in figs. 1 and 2, the lower non-excavation of a kind of soft clay area large tracts of land greening of the present embodiment is implemented the job practices of the underground space, is applied in the underground space of constructing place double-layer structure as shown in Figure 8, may further comprise the steps:
Step S1, the horizontal static pressure steel pipe of employing are constructed gate-shape pipe curtain 1 as shown in Figure 3.Supplementary notes, the engineering method that horizontal static pressure steel pipe is constructed the gate-shape pipe curtain is known by persons skilled in the art, as build starting well and received well, according to its Mechanical Builds, adopt the modes such as pipe jacking method, boring method to advance steel pipe and utilize that fore shaft overlaps between steel pipe, form curtain, form at last the gate-shape pipe curtain, therefore the present embodiment is specifically constructed no longer further and given unnecessary details constructing the gate-shape pipe curtain.
Step S2, more by reference to the accompanying drawings shown in the 4-accompanying drawing 7, carry out soil excavation on pipe curtain 1 interior layer and section ground and top board structure is built, pipe curtain 1 an interior B1 structure 6 is constructed as shown in Figure 2, and is specific as follows:
S2.1, in pipe curtain 1 an inboard bight, the soil excavation of the first construction section 2 is vertically finished forward in as shown in Figure 4 the top end face in the inboard upper left corner of pipe curtain and the junction of sidewall along the pipe curtain steel pipe in described bight; Certainly, also can or select from the upper right corner in other embodiments of the invention other position excavations;
S2.2, at the downward static pressure steel pipe pile in the platform place of the first construction section 2 as the first stand column pile 3;
S2.3, take the first stand column pile 3 as supporting, form top board structure 4 excavating the inboard sprayed mortar of the upper square tube curtain that exposes; As shown in Figure 5, the first stand column pile 3 is connected with top board structure and is connected jointly vertical support as upper square tube curtain, the first stand column pile 3 and top board structure 4 are as the vertical supporting of pipe curtain, effectively prevented the distortion of the first construction section place top structure of excavating out, thereby guaranteed that pipe curtain is indeformable, realized that finally ground deformation is little even without the purpose of distortion;
S2.4, after top board structure reaches design strength, finish the soil excavation of the second construction section (not marking among the figure), described the second construction section communicates side by side with the first construction section 2;
S2.5, at described the second construction section platform place static pressure steel pipe pile as the second stand column pile 5;
S2.6, take the second stand column pile 5 as supporting, construction completing steps S2.3 top board structure 4 has excavated inboard extension of the upper square tube curtain that exposes to the second construction section and has built;
S2.7, loop step S2.4-S2.6 successively, implement the soil excavation of next construction section and building of top board structure, until the earthwork of B1 structure all complete, the top board structure of excavation build and finish; Exemplary, being two sections constructions in the present embodiment---the first construction section and the second construction section therefore behind completing steps S2.6, realized that namely the B1 soil excavation is complete, top board structure is built and finished, directly enter step S2.8; Certainly, in the B1 structure, can a plurality of construction sections be set according to the construction needs in other embodiments of the invention, as wider at section or other need to be divided in the B1 structure of more construction sections, can loop successively step S2.4-S2.6 according to foregoing, until the end face of described pipe curtain inside top is all excavated complete getting final product fully by the geotechnique in top board structure covering and the B1 structure;
The base plate 8 of S2.8, the pipe curtain two side 7 that excavation is exposed and B1 structure carries out concreting (being illustrated in figure 6 as the B1 structure 6 before building), the B1 structure 6 after the B1 reinforced concrete structure 6(that forms end face, side and bottom surface sealing builds as shown in Figure 7);
Step S3, after B1 structure 6 reaches design strength, continue downward excavation construction (as shown in Figure 7), finish the soil excavation of lower one deck, the pipe curtain two side that excavation is exposed and the base plate 10 of underground two-layer structure 9 carry out concreting, finish the construction (as shown in Figure 8) of underground two-layer structure 9.Exemplary, as shown in Figure 7, because the excavation of this layer can not affect ground deformation substantially, except the B1 structure, other layers structure can adopt various ways such as comprising B1 structural excavation mode to excavate.The present embodiment is from improving the angle of excavation efficient, and the mode that adopts full section to excavate is simultaneously downwards constructed.
So far, finish the construction of the underground space of double-layer structure as shown in Figure 8.
Further embodiment as the present embodiment, as shown in Figure 9, connect for fore shaft between the steel pipe of pipe curtain 1, in fore shaft 11 interior injection water-stop slurry (not shown)s, exemplary, in starting well by small-bore push-bench merogenesis jacking steel pipe, rely on steel pipe side fore shaft to link to each other between each single tube and shape all-in-one-piece pipe row, be coated with in advance lubricated water-stop slurry in the fore shaft joint, these slurries can play the effect that reduces single tube jacking frictional resistance at first, can meet the infiltration path between the fixed sealing single tube of water after jacking finishes.As shown in figure 10, described step S2 adopts concrete to spray the groove of filling between the steel pipe at the pipe curtain inside top end face that excavation exposes first before constructing top board structure, and then levelling is hung and built last layer as the waterproof roll 12 of top board structure 4 basal planes.Shown in accompanying drawing 4-8, the first stand column pile 3 or the second stand column pile 5 are respectively the steel pipe post stake (comprising single setting) that many rows vertically arrange, exemplary, in the present embodiment, the first stand column pile 3 is the steel pipe post stake that two rows vertically arrange, the second stand column pile 5 is the steel pipe post stake that three rows vertically arrange, and is certain, can adjust setting (comprising single setting) according to actual conditions in other embodiments.
As the further embodiment of the present embodiment, as shown in Figure 4 and Figure 5, the soil excavation mode of the second construction section of described step S2.4 is by the first construction section 2 horizontal expansion earth excavations.Concrete, the soil excavation of the first construction section 2 is vertical soil excavation, described the second construction section is continued along laterally putting forward the slope excavation by the first construction section 2.Exemplary, the first construction section 2 is set to slope 13 with a side of pipe curtain sidewall opposition, and described the second construction section is laterally put forward sloping excavation construction by the slope 13 of the first construction section 2, and the efficiency of construction that further improves has lowered the excavation difficulty.
The present embodiment does not use engineering mud in the work progress of step S1, growing environment zero impact on greening, except pipe curtain active well, do not take the ground construction place, urban green space zero is destroyed, especially be fit to be applied in constructing of the various underground spaces under the greening of soft clay area large tracts of land.
In other specific embodiments of the present invention, behind step S3, can also comprise step 4: loop step S3, finish the construction of underground sandwich construction according to designing requirement.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art need not creative work and just can design according to the present invention make many modifications and variations.Therefore, all in the art technician all should be in the determined protection domain by claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (7)
1. the job practices of the lower non-excavation enforcement underground space of soft clay area large tracts of land greening is characterized in that, may further comprise the steps:
Step 1, horizontal static pressure steel pipe form the gate-shape pipe curtain;
Step 2, layer and section ground carries out soil excavation and top board structure is built in described pipe curtain, and the B1 structure construction is specific as follows in the described pipe curtain:
2.1, vertically finish forward the soil excavation of the first construction section along pipe curtain steel pipe in the inboard bight of described pipe curtain;
2.2, at described the first construction section platform place static pressure steel pipe pile as the first stand column pile;
2.3, take described the first stand column pile as supporting, form top board structure excavating the inboard sprayed mortar of the upper square tube curtain that exposes, described the first stand column pile be connected top board structure and connect jointly vertical support as upper square tube curtain;
2.4, after top board structure reaches design strength, finish the soil excavation of the second construction section, described the second construction section communicates side by side with described the first construction section;
2.5, at described the second construction section platform place static pressure steel pipe pile as the second stand column pile;
2.6, take described the second stand column pile as supporting, continue completing steps 2.3 described top board structures and excavated inboard extension of the upper square tube curtain that exposes to the second construction section and build;
2.7, loop step 2.4-2.6 successively, implement soil excavation and the top board structure of next construction section and build, until finish whole top board structures in the described pipe curtain and the excavation of the B1 structure earthwork;
2.8, the base plate of pipe curtain two side that excavation is exposed and B1 structure carries out layer of concrete and builds, and forms the B1 reinforced concrete structure of end face, side and bottom surface sealing;
Step 3, after described B1 structure reaches design strength, continue downward excavation construction, finish the soil excavation of lower one deck, the pipe curtain two side that excavation is exposed and the base plate of underground two-layer structure carry out layer of concrete builds, and finishes the construction of underground two-layer structure.
2. the lower non-excavation of soft clay area large tracts of land greening as claimed in claim 1 is implemented the job practices of the underground space, it is characterized in that, also comprises step 4: loop step 3, finish the construction of multi-layer underground space structures.
3. the lower non-excavation of soft clay area large tracts of land greening as claimed in claim 1 is implemented the job practices of the underground space, it is characterized in that, for fore shaft connects, injects water-stop slurry in described fore shaft between the steel pipe of described pipe curtain.
4. the lower non-excavation of soft clay area large tracts of land greening as claimed in claim 1 is implemented the job practices of the underground space, it is characterized in that, described step 2 is carrying out adopting concrete to spray the groove of filling between the steel pipe at the pipe curtain inside top end face that excavation exposes before the top board structure concrete sprays, then levelling is hung and is built one deck as the waterproof roll of described top board structure basal plane.
5. the lower non-excavation of soft clay area large tracts of land greening as claimed in claim 1 is implemented the job practices of the underground space, it is characterized in that, described the first stand column pile or the second stand column pile are the steel pipe post stake that many rows vertically arrange.
6. the lower non-excavation of soft clay area large tracts of land greening as claimed in claim 1 is implemented the job practices of the underground space, it is characterized in that, the soil excavation of the second construction section of described step 2.4 is the horizontal expansion earth excavation by described the first construction section.
7. the lower non-excavation of soft clay area large tracts of land greening as claimed in claim 6 is implemented the job practices of the underground space, it is characterized in that, the soil excavation of described the first construction section is vertical soil excavation, and described the second construction section is continued along laterally putting forward the slope excavation by described the first construction section.
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| CN103775110A (en) * | 2014-01-22 | 2014-05-07 | 上海市城市建设设计研究总院 | Underground excavation construction method for multilayer underground space of soft soil area |
| CN103967052A (en) * | 2014-05-26 | 2014-08-06 | 沈阳铁道勘察设计院有限公司 | Method for protecting height difference soil bodies of bases of new frame structure bridge and old frame structure bridge |
| CN106245677A (en) * | 2016-08-01 | 2016-12-21 | 中国建筑第八工程局有限公司 | The construction method of the Group Buildings underground space |
| CN106759465A (en) * | 2017-01-25 | 2017-05-31 | 上海建工二建集团有限公司 | Explosion vention sets up the flat push type contrary sequence method and structure of basement |
| CN107060845A (en) * | 2017-05-04 | 2017-08-18 | 湖南城市学院 | Underground space structure builds construction method and application |
| CN110593308A (en) * | 2019-08-16 | 2019-12-20 | 浙江交工集团股份有限公司 | Open excavation back pressure construction method for foundation pit of overhead operation subway underground comprehensive pipe gallery |
| CN111485575A (en) * | 2019-12-26 | 2020-08-04 | 上海申通地铁集团有限公司 | Steel frame support construction method for pipe curtain channel with oversized cross section in saturated soft soil area |
| CN112144571A (en) * | 2020-09-24 | 2020-12-29 | 深圳市建工建设集团有限公司 | Excavation-free construction process for green urban underground structure |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103775110A (en) * | 2014-01-22 | 2014-05-07 | 上海市城市建设设计研究总院 | Underground excavation construction method for multilayer underground space of soft soil area |
| CN103967052A (en) * | 2014-05-26 | 2014-08-06 | 沈阳铁道勘察设计院有限公司 | Method for protecting height difference soil bodies of bases of new frame structure bridge and old frame structure bridge |
| CN103967052B (en) * | 2014-05-26 | 2016-01-06 | 沈阳铁道勘察设计院有限公司 | A kind of method of protecting the new and old frame core-tube system substrate discrepancy in elevation soil body |
| CN106245677B (en) * | 2016-08-01 | 2018-06-26 | 中国建筑第八工程局有限公司 | The construction method of the Group Buildings underground space |
| CN106245677A (en) * | 2016-08-01 | 2016-12-21 | 中国建筑第八工程局有限公司 | The construction method of the Group Buildings underground space |
| CN106759465A (en) * | 2017-01-25 | 2017-05-31 | 上海建工二建集团有限公司 | Explosion vention sets up the flat push type contrary sequence method and structure of basement |
| CN106759465B (en) * | 2017-01-25 | 2022-03-22 | 上海建工二建集团有限公司 | Horizontal pushing type reverse construction method and structure for adding basement to super-long building |
| CN107060845A (en) * | 2017-05-04 | 2017-08-18 | 湖南城市学院 | Underground space structure builds construction method and application |
| CN107060845B (en) * | 2017-05-04 | 2019-01-15 | 湖南城市学院 | Underground space structure builds construction method and application |
| CN110593308A (en) * | 2019-08-16 | 2019-12-20 | 浙江交工集团股份有限公司 | Open excavation back pressure construction method for foundation pit of overhead operation subway underground comprehensive pipe gallery |
| CN110593308B (en) * | 2019-08-16 | 2021-05-18 | 浙江交工集团股份有限公司 | Open excavation back pressure construction method for foundation pit of overhead operation subway underground comprehensive pipe gallery |
| CN111485575A (en) * | 2019-12-26 | 2020-08-04 | 上海申通地铁集团有限公司 | Steel frame support construction method for pipe curtain channel with oversized cross section in saturated soft soil area |
| CN112144571A (en) * | 2020-09-24 | 2020-12-29 | 深圳市建工建设集团有限公司 | Excavation-free construction process for green urban underground structure |
| CN112144571B (en) * | 2020-09-24 | 2022-01-04 | 深圳市建工建设集团有限公司 | Excavation-free construction process for green urban underground structure |
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Application publication date: 20130227 |