CN101725155A

CN101725155A - Multi-direction rotary jetting stirring grouting reinforcement construction method for constructing underground structure and soil body by cover excavation and underground excavation and supporting structure thereof

Info

Publication number: CN101725155A
Application number: CN200910250030A
Authority: CN
Inventors: 李宪奎
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-12-02
Filing date: 2009-12-02
Publication date: 2010-06-09

Abstract

The invention relates to a cover excavation and underground excavation advance multi-direction rotary jetting stirring grouting reinforcement active supporting construction method and a supporting structure thereof. The invention aims to design and invent a multi-direction rotary jetting stirring advance reinforcement and active supporting system in cover excavation and underground excavation construction of underground engineering. The effective supporting reinforcement structure can ensure the safety in the cover excavation and underground excavation construction. The technical structure can control soft soil around an underground structure not to deform and the like, thereby being beneficial to playing a good protecting role in shallow buried underground excavation construction; under the protection of a reinforced hard shell, the problems of water leakage, piping, collapse, soil body deformation and the like cannot be caused in underground soil excavation, and the underground soil excavation and structure construction is under the protection of the reinforced hard shell, therefore, the smooth construction of underground engineering can be ensured.

Description

A kind of lid digs, underground structure, the job practices of soil body multi-direction rotary jetting stirring grouting reinforcement and supporting and protection structure are built in tunneling

Technical field:

Patent of the present invention belongs to underground construction, and the underground structure technical field of construction relates in particular to that a kind of lid digs and tunneling applies.

Background technology:

At present; in the cap excavation method of underground space utilization exploitation extensive use and hidden construction process construction, lack the function of the soil body being reinforced in advance supporting; when underground shoveling; particularly the weak soil layer construction moisture is very difficult; especially at complicated soil layer; as mud; loose sand; saturated flow is moulded soil layer etc. traditional cap excavation method; the hidden construction process technology has significant limitation; be difficult to avoid leaking; piping; accident such as cave in; although taked various measures; but accomplish Ground Control; soft foundation is indeformable; be insurmountable. underground shoveling connects post and connects muscle in the hole; the basis is dug the bundle stake and is run into layer of sand easily; soft mud; because its geological environment is special; be easy to generate geologic Environment Problem In; cause paroxysmal geological disaster etc.; intractability is bigger. particularly vertically; laterally undermine and dig into; thin-skinned soil is supportted in top weak soil and two side weak soil and the place ahead does not have self-stable ability; the landslide phenomenon can't be avoided; lid dig with tunneling in the hole during underground construction pile extension big machinery can't construct; adopt hand excavated pile mostly; but because moisture weak sandy soil are very easy to distortion; the landslide accident often takes place; the conventional method difficulty of construction is big. above-mentioned all construction difficult problems; limited the extensive use of cap excavation method and hidden construction process. in order to overcome above-mentioned defective; the lid that the present invention is primarily aimed at underground construction digs not to be had comprehensive in advance to the technical disadvantages problem of reinforcement of soft soil and advance support with hidden construction process; technological improvement and innovation have been carried out; researched and developed the comprehensive leading reinforcing of putting more energy into of a kind of rotary jet stirring reinforcement; active support; protection protected type excavation construction method; this method part thinking is application in practice on engineering; particularly to the underground store of building large span in the complicated soft soil layer and parking factory tunnel etc.; as the underground structure of building; peripheral surrounding weak soil carries out comprehensive rotary jetting stirring grouting reinforcement; form stirring concrete earth reinforcement " eggshell "; under the protection in advance of eggshell; avoided above-mentioned all accidents to produce; put the axe in the helve. in addition; underground construction pile foundation at large space; big machinery can't be constructed; can only adopt breakneck hand excavated pile. in moisture weak soil; a lot of difficult problems can't solve. at above-mentioned; this patent adopts small-sized rotary jet stirring machinery; earlier foundation soil is applied and enlarge a dish cement-soil rotating spraying mixture pile; put more energy into core and the required muscle of uplift pile in the stake then; solve an above-mentioned difficult problem; thereby changed lid dig technology that job practices and pile extension with the hidden construction process pile foundation connect muscle must Mian Shi so; can guarantee quality again, save cost; accelerate the duration.

Summary of the invention:

The objective of the invention is to; dig when constructing at underground construction lid with tunneling; design has been invented a kind of comprehensive rotary jet stirring and has been reinforced in advance; active support; the lid of protection, protected type digs and tunneling construction technology and underground building structure; so that weak soil is indeformable etc. around the control periphery, underground building; be convenient to when shallow buried covered excavation applies, play a good protection; under the protection of reinforcing duricrust; do not have during underground shoveling leak, problems such as landslide, soil deformation, underground construction can smooth construction under the shielding of reinforcing duricrust.Present technique changes conventional method underground construction hole digging pile, substitutes hole digging pile etc. with the stake of many dish cement-soil strength cores.

The technical scheme of patent of the present invention: a kind of comprehensive rotary jet stirring is reinforced in advance; advance support protected type lid digs method and the reinforcement stiffening element with tunneling construction underground structure; comprise: ground and underground to structure outer on; the soil body all around that reaches both sides down carries out omnibearing rotary jet stirring cement-soil consolidation process and cement-soil reinforcement; the construction of putting more energy into; stir under the protection that forms the weak concrete shell that is added with muscle and strength in the spray of executing that has applied; carrying out the underground structure structure construction, equally also is that cement-soil in the rotary jet stirring that formerly performs (being also referred to as low-grade concrete) is inserted strength when underground construction pile extension and basic pile foundation construction.

The specific embodiment:

Relevant technology contents of the present invention and being described in detail as follows

1, cap excavation method

At first 1, around the underground structure thing of seemingly building, make water-stop curtain retaining support wall, 2, cut the earth to from ground and do the position of upper cover plate, on the work plane that digs, manufacture upper cover plate, on the supporting piling wall top around upper cover plate is pressed in, 3 soil outlets at the native Wall of retaining dig vertical shaft and horizontal tunnel, 4 tunnels enter support wall limit and post limit, that digs wall and post manufactures Wall body and cylinder space, 5 are having the underground structure owner body of construction under the good shielding of leading reinforcing active support, 6 are stirred strength core stake and muscle core machine at tool by underground space construction, manufacture base plate on the stake top.

2, hidden construction process at first 1, to seemingly building underground structure, top and around the Wall soil body carry out omnibearing closed rotary jetting stirring grouting reinforcement and joint bar supporting 2, advance that cut the earth in the hole and structure construction digs identical with lid.

Concrete conjunction with figs. is described as follows:

Fig. 1 cap excavation method plan view

1, rotary jet stirring sealing curtain is reinforced stake 2, vertical shaft

Fig. 2 sectional drawing

1, the reinforcement core is stirred in the spray of vertical edges sidespin, the strength core is reinforced water-seal pile;

2, anchoring pile; 3, enlarge a dish stirring concrete earth strength core stake; 4, basement concrete base plate 5, basement concrete top board 6, ground 7, strength core 8, rotating spraying mixture pile 9, strength core

Fig. 3 hidden construction process sectional drawing

1, ground 2, the double leading reinforcing stake 3 of arch rotary jet stirring interlock, oblique anchor pole 4, side rotary jet stirring are reinforced stake 5, basement column 6, exterior wall 7, basement crossbeam in advance

Fig. 4 vault canopy is reinforced arch shell sectional drawing in advance

1, horizontal mixing jet-grouting interlock stake 2, steel concrete mountain on the other way round arch 3, stirring stiff-core cement soil wall

Fig. 5 basement roof sectional drawing

1, basement roof 2, connect post 3, vertical rotary jet stirring is reinforced stake 4, cob wall

Fig. 6 enlarges a dish and stirs strength core stake top top board pile extension section

1, ground 2, vertical shaft and transverse passage-way 3, top pillar overlap joint reinforcing bar 4, cement-soil

Fig. 7 enlarges a dish and stirs strength core stake bottom pillar pile extension section

1, a dish cement-soil 2, concrete stiff-core stake 3 are propped up in expansion, pillar overlaps reinforcing bar up and down

In the preferred embodiment of patent of invention; high-pressure rotary-spray stirs diameter 500-1200MM by the mutual interlock of pile body; in the stratum, can form the thick plate shell of 400-900mm; slotting strength core and muscle core can form Wall outside the supporting construction in soil cement; carrying out leading high-pressure rotary-spray stirring grouting reinforcement and processing the soil body around up and down is comprehensive, follow-up lid is being dug and good protection and shielding effect are played in tunneling civil engineering etc.

Claims

1. a lid digs, tunneling builds underground structure, the job practices of soil body multi-direction rotary jetting stirring grouting reinforcement and supporting and protection structure, it is characterized in that, this method applies to level, that tilt or the vertical omnibearing consolidation by grouting soil body, form advance support, cement-soil shielding body of wall or the duricrust initiatively reinforced.

2. the described a kind of lid of root a tree name claim 1 digs, underground structure is built in tunneling and supporting and protection structure; the leading multi-direction rotary jetting stirring grouting reinforcement job practices of the soil body; it is characterized in that, to lid dig with the tunneling structure outsides or inboard hole in soil layer advance pre-grouting and reinforce, protection construction peace is closed.

3. the described a kind of lid of root a tree name claim 1 digs, underground structure is built in tunneling and supporting and protection structure; leading multi-direction rotary jetting stirring grouting reinforcement job practices of the soil body and supporting and protection structure; it is characterized in that constructing structure exterior wall, upper cover plate, crossbeam and post and the stake of resistance to compression anti-floating under the cement duricrust protection of grouting and reinforcing is screened in advance.

4. the described a kind of lid of root a tree name claim 1 digs, underground structure is built in tunneling and supporting and protection structure, the leading multi-direction rotary jetting stirring grouting reinforcement job practices of the soil body, it is characterized in that grouting and reinforcing is that high-pressure rotary spraying method, deep mixing method, pressure grout method form cement soil wall, hardboard shell.

5. the described a kind of lid of root a tree name claim 1 digs, underground structure is built in tunneling, leading multi-direction rotary jetting stirring grouting reinforcement job practices of the soil body and supporting and protection structure, it is characterized in that the compressive pile of underground construction, anti-floating stake are that rotary jet stirring muscle core and strength core form.

The described a kind of underground construction lid of root a tree name claim 5 dig, the leading multi-direction rotary jetting stirring grouting reinforcement job practices of tunneling and supporting and protection structure, it is characterized in that, the muscle core is steel pipe, geologic drilling rod, bar reinforcement and steel strand and nonmetal muscle, the strength core is reinforced concrete pile, prefabricated tubular pile, precast concrete square pile and steel pipe, i iron.

The described a kind of underground construction lid of root a tree name claim 4 dig, the leading multi-direction rotary jetting stirring grouting reinforcement job practices of tunneling and supporting and protection structure, it is characterized in that, the underground construction retaining wall structure be insert the muscle core in vertical, horizontal, the oblique cement-soil, the strength core is formed.