CN101650182B

CN101650182B - Method for measuring cylinder in pile directly

Info

Publication number: CN101650182B
Application number: CN 200810041578
Authority: CN
Inventors: 朱骏; 金毅; 周蓉峰; 王正兴
Original assignee: Shanghai Mechanized Construction Co Ltd
Current assignee: Shanghai Mechanized Construction Group Co Ltd
Priority date: 2008-08-11
Filing date: 2008-08-11
Publication date: 2013-08-07
Anticipated expiration: 2028-08-11
Also published as: CN101650182A

Abstract

The invention relates to a method for measuring the verticality of a cylinder in a pile directly during underground engineering one-cylinder-one-pile construction, which is characterized in that a circular tube of which the bottom is sealed is arranged inside the cylinder; the inside of the center of the bottom of the circular tube is provided with a measuring reference point which is distributive light; and the distributive light is a laser beam. On the ground, a center line of the circular tube is positioned on a center line in a stiff steel cylinder, and the circular tube is relatively fixed with the stiff steel cylinder; a theoretical axis position and a reference point of a corresponding pile foundation are marked on the ground in advanced, and after the stiff steel cylinder is put in the cylinder, the top center of the stiff steel cylinder is adjusted and fixed to the theoretical axis position of the corresponding pile foundation; then a vertical collimator is used so as to enable the center of the vertical collimator to align with the reference point on a ground axis; and if a benchmark axis and the measuring reference point of the stiff steel cylinder are positioned on the same straight line, the stiff steel cylinder lies in a vertical state. The method has the advantage of having direct and quick characteristics, measures objects directly, reflects the verticality of the objects, can be used circularly and has economic and high-saving characteristics.

Description

Method for measuring cylinder in pile directly

Technical field

The present invention relates to an a kind of method of directly measuring stake inner cylinder verticality during for underground works one post one pile driving construction.

Background technology

Reverse construction is earlier along building basement axis or construct on every side diaphram wall or other supporting construction, simultaneously the relevant position construction supporting pile of interior of building and with this as construction period or as permanent structure) support of bearing superstructure deadweight and construction loads.The beam slab floor structure of construction ground one deck is as the very big support of diaphram wall rigidity after it is finished, and earth excavation and build each layer underground structure downwards successively subsequently is until the base plate back cover.Because the floor structure of ground one deck has been constructed and finished, and successively carries out the construction of superstructure so can make progress simultaneously, ground is upper and lower constructs simultaneously thereby form, and finishes until engineering.Construction at reverse construction center pillar (rigid steel pile) and supporting pile (cast-in-situ bored pile) is a part and parcel, it is to hole in place after smooth, put down steel reinforcement cage (becoming stake behind the placing concrete) then in the bottom in hole, subsequently the top of steel reinforcement cage interpolation shaped steel (becoming post behind the placing concrete), carry out the perfusion of monolithic concrete behind the location to be measured, stake be whole buildings the basis, be arranged in the soil layer under the whole buildings.Post is the support frame of building, and its is exposed by the excavation back after deposit concrete forms intensity, therefore for the having relatively high expectations of the verticality of post, generally need reach 1/300 to 1/500.And be rigid steel pile top adjunction pile cover again on pile body for the measuring method of interpolation shaped steel before building concrete of post in common underground works one post one pile driving construction at present, thereby make rigid steel pile prolong (exceeding ground), utilize similar triangle theory then, verticality by control ground above pile cover is to reach the verticality of control below ground rigid steel pile, and its reference point of measuring control is the top that is positioned at rigid steel pile end face and the adjunction pile cover on ground.Because the pile cover length that lengthens is significantly less than the length that is embedded in rigid steel pile in the soil, this kind method is the indirect measurement on the long limit of minor face control, and measuring accuracy is lower, generally only has about 1/100, can't reach the job design requirement of present high level and high-rise building.

Summary of the invention

The objective of the invention is to solve the problem that its verticality can't accurately be measured in the major gene insertion boring in the reverse construction of the prior art, a kind of method for measuring cylinder in pile directly is provided.The present invention designs method for measuring cylinder in pile directly, it is characterized in that: the pipe of putting a base seal in column body, in the built-in datum mark of the bottom centre of pipe, on ground the center line of pipe occupy in the rigid steel pile on the center line, and with the rigid steel pile relative fixed, mark theoretical axis position and the reference point of corresponding pile foundation in advance on ground, rigid steel pile is put into behind the pile body its top center adjusted on the theoretical axis position of corresponding pile foundation and fixing.Use plumb aligner then, the reference point with on the centrally aligned ground axis of plumb aligner forms datum axis thus.After this observe the datum mark that is positioned at pipe bottom centre in the rigid steel pile, if the datum mark of datum axis and rigid steel pile is located along the same line, then represent the rigid steel pile plumbness, otherwise, then should adjust rigid steel pile bottom and position, make the datum axis of datum mark and plumb aligner be in coincidence status, and be fixed.The built-in datum mark of the bottom centre of pipe is a concentrated light upwards.Concentrated light is laser beam.Advantage of the present invention be have directly, characteristics fast.It directly measures object itself, the verticality of reflection object.Need not to obtain corresponding data by conversion or other round-about ways.Use this method, the pipe in the built-in rigid steel pile is recyclable to be recycled again, saves cost, and other ancillary method also can be recycled, and has economic high characteristics of saving.

Description of drawings

Accompanying drawing is structural representation of the present invention,

Below in conjunction with example the present invention is elaborated.

Embodiment

At first in cylinder 3, deploy the pipe 1 of a base seal, in the built-in datum mark of the bottom centre of pipe 1, can select laser pen 2 for use, laser pen 2 is upwards placed, laser beam is penetrated along the center line of pipe 1, on ground the center line of pipe 1 is occupy in the rigid steel pile 3 on the center line, and with rigid steel pile 3 usefulness fixed supports 6 relative fixed, so that construction can be extracted after finishing, treat down that the correction of root post is used.Fixed mount 4 is set on ground in advance, and mark the theoretical axis position of corresponding pile foundation and the reference point of appearing the theoretical axis position of pile foundation at fixed mount 4 subscripts, rigid steel pile 3 put into behind the pile body 5 its top center adjusted on the theoretical axis position of corresponding pile foundation and fixing, use plumb aligner, reference point with on the centrally aligned ground axis (on the fixed mount 4) of plumb aligner forms datum axis thus.After this observe the laser beam of the datum mark ejaculation that is positioned at pipe 1 bottom centre in the rigid steel pile, if datum mark and the laser beam of datum axis and rigid steel pile 3 are located along the same line, represent that then rigid steel pile 3 is in plumbness.Otherwise, then should adjust the position of rigid steel pile 3 bottoms, make the laser beam that penetrates on the datum mark and the datum axis of plumb aligner be in coincidence status, be about to post and adjust to vertical position and be fixed, extract the pipe 1 of relative fixed rigid steel pile 3 in then and treat that the root post is proofreaied and correct use down.Can carry out concrete pouring subsequently.

Claims

1. method for measuring cylinder in pile directly, it is characterized in that: the pipe of putting a base seal in column body, in the built-in datum mark of the bottom centre of pipe, the built-in datum mark of the bottom centre of pipe is a concentrated light upwards, on ground the center line of pipe occupy in the rigid steel pile on the center line, and with the rigid steel pile relative fixed, mark theoretical axis position and the reference point of corresponding pile foundation in advance on ground, rigid steel pile put into behind the pile body its top center adjusted on the theoretical axis position of corresponding pile foundation and fixing, use plumb aligner, with the reference point on the centrally aligned ground axis of plumb aligner, form datum axis thus, after this observe the datum mark that is positioned at pipe bottom centre in the rigid steel pile, if the datum mark of datum axis and rigid steel pile is located along the same line, then represent the rigid steel pile plumbness, otherwise, then should adjust rigid steel pile bottom and position, make the datum axis of datum mark and plumb aligner be in coincidence status, and be fixed.

2. by the described method for measuring cylinder in pile directly of claim 1, it is characterized in that: concentrated light is laser beam.