The construction method of barrel type underground garage
The present invention relates to the underground building technology, more specifically say so and build the Building technology in cartridge type underground stereo garage.Described underground building technology also is applicable to the construction as the underground vertical shaft of cartridge type storehouses such as underground warehouse, oil cellar, underground cold storages.
Along with the propelling and the The development in society and economy of Urbanization in China, the owning amount of automobile increases gradually, and the problem of " parking difficulty " highlights.For addressing this problem better, building underground garage under city high rise building has been general way, but still can not fundamentally solve the problem of parking difficulty.Some relevant units have developed multi-storied garage on the ground subsequently, promptly build sky parking more than ground, the problem of coming stopping at release.Surface parking lots do not solve the problem of parking difficulty up hill and dale because of relating to city integrated planning, the influence of view and the rising of soil land price etc. being advanced slowly.Patent of invention ZL03116973.2 has proposed the notion in underground stereo garage, and announced a kind of construction method of underground garage, mainly introduced the building course in underground stereo garage, but its shaft construction method mainly is based on drop shaft sinking and builds, this method is subjected to the formation condition restriction bigger, and construction quality is difficult to control, and the influence to surrounding enviroment during construction also is difficult to avoid, and is difficult to successfully finish the construction in underground stereo garage.
The pit shaft construction is the first step of underground stereo garage exploitation, also is a most important step.Therefore, the key whether the underground stereo garage is succeeded in developing is whether pit shaft can build up smoothly, especially the construction in underground stereo garage generally is that the routine techniques means are difficult to solve the Construction Problems of underground stereo garage pit shaft at exploitation residential quarter or the more zone of resident population early.Therefore, need improve the routine techniques means in conjunction with existing machinery equipment, the development tool of the required pit shaft in research and development underground stereo garage.
The deficiency that art methods construction underground stereo garage pit shaft exists mainly contains:
(1), adopts open caisson method to carry out dividing into of underground stereo garage cylindrical shell and have following problem with installation
● it is high that pit shaft adopts the cast-in-site curing condition to require, and the overall construction period is longer;
● pit shaft sinks establishes easily run-off the straight in the process, and the correction difficulty is big, and the control of cylindrical shell verticality is relatively poor;
● must taking dewatering measure just can make back cover before the pit shaft back cover, everything goes well with your work carries out, and cost increases;
● open caisson efficient when meeting gravel layer, hard viscosity layer is lower, the difficulty of sinking;
● open caisson construction to around the soil body can produce destruction, surrounding enviroment and building are impacted.
(2), adopt construction method of underground continuous wall to carry out the cylindrical shell construction of underground stereo garage and have following problem
● the easy seepage of diaphragm wall framing seam crossing;
● diaphragm wall body of wall verticality is not enough, does not satisfy the requirement of post facility installation accuracy;
● cylindrical shell back cover technical requirements height, effect is difficult for reaching requirement;
● corresponding auxiliary working measure is more, deep-well precipitation etc.
Summary of the invention
At the defective that exists in the above-mentioned prior art, consider characteristics such as construction regional population in underground stereo garage is many, the space is little, building is intensive, it is low that technical problem to be solved by this invention provides a kind of construction costs, construction period is short, difficulty of construction is little, applied widely, construction is to the construction method of the little barrel type underground garage of surrounding enviroment influence.
For solving the problems of the technologies described above, the construction method of a kind of barrel type underground garage provided by the present invention is characterized in that, the technological process of construction method:
1) preparation: comprise that soil stabilization, well head collar tie beam and drilling well Ping Tai make in the well head periphery certain limit, equipment is in place and leveling;
2) creep into: bore the construction of underground vertical shaft hole;
3) mud displacement: creep into reach projected depth and diameter after, carry out the mud displacement; Mud index after the displacement wants to guarantee that the follow-up steel concrete borehole wall transfers that everything goes well with your work carries out;
4) the steel concrete borehole wall is installed: adopt " suspension method " sinking steel concrete borehole wall;
5) borehole wall support with backfilling: after the borehole wall sinks to the precalculated position, proofread and correct the verticality of the borehole wall, carry out support with backfilling then;
6) drain ballast water in the pit shaft;
7) equipment and ground ancillary facility are installed in the well.
Further, described step 2) in, the mode pore-forming of " once creep in advance, classification reaming " is adopted in construction.
Further, described step 2) in, use slag-drip opening to be laid in the drill bit of drill bit periphery, strengthening well washing effect, its effect is to reduce in the classification reaming process the more number of times of bit change, improves deslagging in drilling efficiency and the drilling process.
Further, in the described step 4), adopt the site prefabrication mode at the bottom of (a bottom joint) borehole wall, all the other boreholes wall adopt " tile " borehole wall scene to connect, and segmentation connects then.
Further, in the described step 4), in transferring process, constantly in the steel concrete pit shaft, annotate ballast water; Sink smoothly to guarantee the reinforced concrete well wall energy.
Further, in the described step 4), according to the installation requirement of plant equipment in the pit shaft, diverse location place embedded iron parts in the steel concrete borehole wall is so that be connected with the garage plant equipment.
Further, in the described step 5), filler adopts cement paste and stone.
Further, in the described step 7), the mud in the boring procedure is handled, reached environmental requirement.
Further, in the described step 7), between the facility of building in installation ground ancillary service.
Utilize the drilling well construction method of barrel type underground garage provided by the invention, compared following advantage with conventional method:
1) construction method construction costs of the present invention is low,
When adopting construction method of the present invention to construct pit shaft, prefabricated pit shaft thickness of shaft wall can be controlled in about 450mm.
1. under the equal conditions drop shaft sinking thickness of shaft wall greater than construction method thickness of shaft wall of the present invention, the resistance that mainly relies on the borehole wall to conduct oneself with dignity to overcome the soil body because of drop shaft sinking sinks, it must have certain thickness (its concrete thickness need calculate), and therefore, drop shaft sinking borehole wall cost increases;
2. adopt the construction of diaphragm wall method, general thickness of wall body is divided into 800mm, 1000mm, 1200mm.Greater than construction method thickness of shaft wall of the present invention, and required ancillary method is more than construction method of the present invention, and cost increases;
3. with above two kinds of method ratios, construction method work progress of the present invention is simple and direct relatively, because of its ancillary method is few, so its construction costs is low.
2) construction method construction period weak point of the present invention,
1. the drop shaft sinking construction is adopted High-Pressure Water to wash away, empty the wellbore bottom soil body and is made well-sinking, and broken soil body speed is slower than rate of penetration, and the construction period is long; Cylindrical shell is generally cast-in-place at the scene, and curing time is long, and total duration of engineering increases.
2. curing time is longer after the diaphragm wall concrete casting, and needs the excavation body of wall to enclose the soil body in the cylindrical shell, and total duration of engineering is longer than construction method of the present invention.
Bit cutting soil body speed was fast when construction method 3. of the present invention crept into, and aided process is less, and the duration is shorter relatively.
3) construction method difficulty of construction of the present invention is little,
1. drop shaft sinking construction well-sinking is met the difficulty of sinking when more coarse than hard formation or borehole wall outer wall; Easily produce crookedly when meeting hard-soft heterogeneous ground, correction is difficult, and verticality is difficult to control, and it is unfavorable that plant equipment is installed;
Excavate difficulty when 2. the construction of diaphragm wall method is met than hard formation, sometimes must be by creeping into the method auxiliary construction; Construction of diaphragm wall becomes the difficult one-tenth regular circular of continuous body of wall, the later stage plant equipment is installed exert an influence.
3. construction method construction drill moment of torsion of the present invention is big, and drill bit creeps into and influenced not quite by soil mass property, creeps into to be easier to, and becomes the well verticality better; Pore-forming is rule, and is favourable to the installation of the later stage borehole wall and plant equipment.
4) construction method of the present invention is applied widely,
1. adopt construction method construction pit shaft of the present invention, not only can in the Quaternary system covering layer, carry out, and can in than hard formation, creep into, so the scope of application is wider.
2. adopt open caisson method to be only applicable to soft soil layer.Adopting the diaphragm wall method to need drilling method to cooperate just when meeting than hard formation can finish.
5) construction method construction of the present invention is little to the surrounding enviroment influence,
1. drop shaft sinking construction is washed away, is emptied the shaft bottom soil body with High-Pressure Water and makes well-sinking, is easy to generate piping and quicksand phenomenon in the chiltern soil layer, causes the surrounding ground sedimentation.
2. the easy seepage of diaphragm wall framing seam crossing, the wall outer side silt particle generation hole that easily runs off, sedimentation appears in ground, and body of wall collapses when serious.
3. construction method construction of the present invention is reinforced in advance to the well head periphery soil body, and drilling construction is minimum to the influence of well head surrounding enviroment; The pit shaft joint is done waterproofing work in the pit shaft installation process, and the reason joint does not leak and the piping phenomenon occurs, and surrounding enviroment and building are unaffected.
Description of drawings
Fig. 1 is the process flow diagram of the construction method of embodiment of the invention barrel type underground garage;
Fig. 2 is the structural representation of drill bit in the embodiment of the invention:
Fig. 3 is the structural representation of the cartridge type well of the embodiment of the invention;
Fig. 4 is the vehicle parking schematic diagram of the embodiment of the invention.
The specific embodiment
Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing similarity method of the present invention and similar variation thereof all should be listed protection scope of the present invention in.
By shown in Figure 1, the construction method of the described barrel type underground garage of the embodiment of the invention is as follows:
1) well head periphery soil stabilization: adopt SMW worker's method that the peripheral soil body of well head is reinforced, reinforcing scope calculates the back according to well head periphery formation condition and surrounding enviroment to be determined, and makes fore shaft in the vertical certain depth scope in edge in well head;
2) well head collar tie beam, terrace are made: according to size, the arrangement of reinforcement of borer chassis size, rig and drilling tool weight, well head place formation condition design well head collar tie beam and drilling well Ping Tai, make and maintenance;
3) in place, the leveling of equipment: according to the diameter and the degree of depth of well, in conjunction with well head place formation condition, select suitable one-tenth well equipment, equipment is in place, leveling are so that it becomes the well perpendicularity deviation to meet the requirements;
4) boring: equipment is in place, can begin to bore the vertical shaft hole after the leveling, drilling process is used earlier than the minor diameter drill bit and is once crept into the shaft bottom design elevation, and then carry out the classification reaming in conjunction with formation condition, note in the boring procedure according to strata condition and drilling depth and in time adjust every drilling parameter and mud balance, prevent the hole that collapses;
5) mud displacement: after projected depth and diameter reach, the displacement of beginning mud, the mud index after the displacement wants to guarantee that the follow-up steel concrete borehole wall transfers that everything goes well with your work carries out;
6) the steel concrete borehole wall sinks: the mud displacement promptly begins the steel concrete borehole wall and transfers work after reaching suitable index.The steel concrete borehole wall is transferred employing " suspension method ", adopt the site prefabrication mode at the bottom of the borehole wall, all the other boreholes wall adopt the on-the-spot connection of " tile " borehole wall, and segmentation connects then, in transferring process, constantly in pit shaft, annotate ballast water, sink smoothly to guarantee the reinforced concrete well wall energy; According to the installation requirement of plant equipment in the pit shaft, diverse location place embedded iron parts in the steel concrete borehole wall is so that be connected with the garage plant equipment; By shown in Figure 3, the structure of cartridge type well comprises steel concrete pit shaft 1 and drilling shaft lining 2;
7) borehole wall support with backfilling: the borehole wall sinks to after the end is fixed on well head, carry out filling immediately, and filler adopts cement paste and stone;
8) water is drained in the tube: after borehole wall maintenance reaches certain intensity, the water in the tube is drained;
9) equipment is installed in the well: machinery and electronic equipment that the underground stereo garage parking is installed in pit shaft;
10) the ground ancillary facility is installed: build on the ground between facility, between facility in the installation relevant device.The vehicle parking of barrel type underground garage as shown in Figure 4.
The drilling well construction method of the described barrel type underground garage of the embodiment of the invention has following characteristics:
1), adopts the construction method of the present invention underground pit shaft of constructing.Adopt the all-hydraulic power head rig to carry out full section underground hole-forming.Its advantage has:
1. drilling efficiency height;
2. become the hole perpendicularity height to can be controlled in 2～5 ‰, pit shaft is installed the back verticality and is can be controlled in 0.3 ‰;
2), the steel concrete cylindrical shell adopts prefabricated lining, prefabricated at the scene at the bottom of the borehole wall, the borehole wall adopts " tile " borehole wall, burst is prefabricated in producer, the scene of being transported to utilizes special mechanical connection, the hole inner suspension is transferred installation, the construction technical schemes that plant equipment is installed.Its advantage has:
1., the prefabricated place of the excessive borehole wall needn't be prepared in the scene;
2., borehole wall convenient transportation;
3., prefabricated at the scene at the bottom of the borehole wall, do not adopt connected mode at the bottom of " tile " borehole wall, can guarantee its integrality.
3), take the measure of well head perimeter reinforcement according to Different Strata condition and surrounding enviroment.
Its effect has: the safety that becomes protection well head periphery building in the well process.
4) creep into the mode pore-forming of employing " once creep in advance, classification reaming ", adopt the reaming bit of particular design, as shown in Figure 2, described reaming bit comprises bit sub 4, the guide pipe 5 that is connected with bit sub 4 axial (downwards); Reclinate umbrella tool arm 6 between bit sub 4 and guide pipe 5; Be located at the slag-drip opening 7 of umbrella tool arm 6 outermosts (circle) end, to strengthen well washing effect, its effect is to improve deslagging in drilling efficiency and the drilling process.
5), equipment is installed in the well.
Roughly step is as follows for it:
1., parking plant equipment in the mounting shaft;
2., parking electronic equipment in the mounting shaft;
3., fire fighting equipment in the mounting shaft;
4., ventilation equipment in the mounting shaft
6), the mud in the drilling process is handled, reach environmental requirement.
Mud in the drilling process contains a large amount of native slags, can adopt the mode that gravitational settling is handled and two kinds of methods of mechanical treatment combine to its processing, its concrete grammar is: the scene is provided with sedimentation basin (if field condition permission) → mud in sedimentation basin precipitation → cross the mud that vibrosieve → mud crossed after cyclone → interpolation chemical agent made the slurry curing → curing of cyclone through the mud of post precipitation to transport.