关于沪杭甬高速公路沽渚至宁波段纵坡调整设计的说明

沪杭甬高速公路沽渚至宁波段拓宽纵坡设计说明根据2005年8月7日沪杭甬高速公路沽渚至宁波段拓宽纵坡设计方案专家咨询会会议纪要精神，我院及时组织测量人员，于8月院18至9月25日对杭甬高速沽渚至宁波段（K59+550K140+370）进行纵横断面外业测量及调查工作，并收集了本路段20032005年路面加铺资料，在对外业基础资料整理完善后，项目组就外业工作情况向院总师办进行了汇报，9月28日，院总师办组织院相关专业总工程师及主要技术人员对沽渚至宁波段拓宽纵坡设计方案专家咨询会意见逐条进行认真探讨研究，并对拓宽纵坡设计提出了明确的设计指导意见。国庆长假期间，设计人员连续加班加点，根据新的实测资料分幅进行纵坡设计，具体情况汇报如下：一、外业工作情况及基础资料分析1平面控制网本次测量对51个GPS控制点，检测精度情况见附表。水平角检测较差在014秒以内，边长检测除GE619GE620较差为0.109米，其它边长较差均小于5cm。通过对GPS点的角度和边长检测表明， GE619GE620的边长误差较大，经分析可能是GE620点位置挪动造成，此点的高程也与原测高程相差0.266米，其余GPS点的平面位置均符合规定要求。边长角度检查统计表点 号检 测 角 度检测边长（ m ）反 算 角 度反算边长( m )角度较差允许 15边长较差允许 70mm备 注GE402- GE4010 00 00431.566431.598-32GE401- GE400182 45 30439.435182 45 21439.452+9-17GE409- GE4080 00 00493.585493.576+9GE408- GE407176 46 19394.654176 46 23394.673-4-19GE419- GE4180 00 00459.691459.724-33GE418- GE417183 22 18429.437183 22 07429.442+11-5GE427- GE4260 00 00434.705434.733-28GE426- GE425176 39 49466.120176 39 35466.163+14-43GE435- GE4340 00 00428.508428.545-37GE434- GE433189 36 46375.869189 36 38375.832+8+37GE454- GE4530 00 00418.198418.204-6GE453- GE452184 18 48476.275184 18 48476.3000-25GE459- GE4580 00 00492.697492.673+24GE458- GE457175 54 44383.245175 54 58383.219-14+26GE469- GE4680 00 00420.233420.253-20GE468- GE467173 46 25473.375173 46 13473.403+12-28GE479- GE4780 00 00457.002456.975+27GE478- GE477184 46 38462.709184 46 26462742+12-33边长角度检查统计表点 号检 测 角 度检测边长（ m ）反 算 角 度反算边长( m )角度较差允许 15边长较差允许 70mm备 注GE495- GE4940 00 00398.393398.404-11GE494- GE493176 11 18403.782176 11 07403.751+11+31GE502- GE5010 00 00492.329492.318+11GE501- GE500183 52 05262.958183 52 11262.940-6+18GE515- GE5140 00 00403.875403.874+1GE514- GE513184 01 29439.481184 01 23439.502+6-21GE526- GE5250 00 00326.860326.854+4GE525- GE524189 05 35381.457189 05 44381.465-9-8GE542- GE5410 00 00519.701519.723-22GE541 -GE540184 27 03331.280184 26 55331.254+8+26GE543- GE5420 00 00331.280331.254+26GE542- GE541182 06 58396.831182 07 03396.824-5+7GE620- GE6190 00 00533.711533.820-0.109超限GE619- GE618185 15 30575.769185 15 18575.795+12-26GE627- GE6260 00 00481.577481.570+7GE626- GE625175 07 05588.992175 07 04589.024+1-322高程控制网横断面测量前，采用水准仪对GPS控制点的高程及水准点的高程稳定情况进行了检测。一般用桥端基架上的点作为固定点，用水准符合路线的方法进行检核。通过检核发现，个别GPS点的高程有下沉现象。本次共检测191个控制点，其中校差在05cm的170个点；510cm 16个点；大于10cm的5个点。校差大于5cm的GPS点，基本布设在路中间隔离带内，由于地基松软，由点位下沉的原因造成。还有5个相差在10cm以上的点，是否为点位挪动，需要落实。详见GPS控制点高程较差对照表（附后）综合检查情况：本次检测结果显示，沿线布设的43个水准点中有11个水准点的校差超过3cm,是否超过规范要求需待与高等级水准点的联测平差后再作评价；K60K90段已补设水准点。本次检测未联测到路下的高等级水准点，下一步工作将进行高等级水准点的联测，再进行一次平差，以建立稳定的高程控制网。GPS控制点高程较差对照表序号点号原高程检测高程差 值备 注1GE40010.24310.2260.0172GE4019.4669.4320.0343GE4029.2339.2090.024水1304GE40311.19611.1680.0285GE40414.90414.8690.0356GE40510.35610.2830.073水1317GE4068.3738.3570.0168GE4078.2118.0990.1129GE4088.9208.8650.05510GE4098.2598.1930.06611GE4108.8638.8180.045水13212GE4117.9687.9490.01913GE4128.3598.3380.02114GE4138.7308.6990.03115GE4147.8387.8110.02716GE4157.9967.9790.017水13317GE4167.4917.4440.04718GE4178.1948.213-0.01919GE4188.2138.1650.04820GE4198.0508.0160.03421GE4209.3299.3000.029水13422GE4219.0629.0440.01823GE4227.9907.9150.07524GE4239.1049.0770.02725GE4248.9538.9390.01426GE4257.1017.0580.04327GE4267.6277.6270.000水13528GE4275.8265.7680.05829GE4285.4835.4770.00630GE4297.3237.2280.09531GE4308.3978.3660.03132GE4316.8486.8290.019水13633GE4328.4228.4000.02234GE4338.4808.4470.03335GE4346.8466.8070.03936GE4357.0486.9620.086水13737GE4367.0787.0510.02738GE4377.2547.2230.03139GE4386.9216.9000.02140GE4396.8286.8110.01741GE4407.7307.7070.023水13842GE4418.6278.6030.02443GE4427.7907.7690.02144GE4436.5826.5490.03345GE4446.6556.6330.02246GE4456.4106.3810.029水13947GE4466.3766.3420.03448GE4476.6156.5970.01849GE4486.8546.8280.02650GE4498.3238.2910.032水14051GE4503.6983.6770.02152GE4513.7823.7490.03353GE4526.6676.6310.03654GE4534.4954.4730.02255GE4545.0565.0420.014水14156GE4557.0557.0190.03657GE4569.0609.0290.03158GE4579.4529.4180.03459GE4587.8427.8190.023水14260GE4599.2359.2090.02661GE4607.6137.5970.01662GE4616.2406.319-0.07963GE4628.4738.477-0.00464GE4636.3606.3370.023水14365GE4647.2537.2190.03466GE4656.9526.9160.03667GE4667.5307.5090.02168GE4678.1748.1580.01669GE4687.0957.0630.032水14470GE4696.9196.9010.01871GE4708.0007.9790.02172GE4718.2318.2130.01873GE47210.21510.1920.023水14574GE4737.3277.3000.02775GE4746.7646.7290.03576GE4756.5986.5770.02177GE4765.6505.6330.01778GE4776.1296.0900.039水14679GE4786.8416.8090.03280GE4796.5286.5070.02181GE4806.3386.3010.03782GE4817.8697.8410.02883GE4829.4599.4270.032水14784GE48311.30411.2870.01785GE4848.2238.2090.01486GE4857.6377.6190.01887GE4866.7736.7490.02488GE4877.2417.2090.032水14889GE4886.7156.6970.01890GE4896.2186.1580.06091GE4905.3855.2940.09192GE4916.7026.6440.05893GE4926.1036.0770.026水14994GE4936.5866.5520.03495GE4947.0897.0610.02896GE4957.2787.2430.03597GE4967.4877.4690.01898GE4976.6426.6180.024水15099GE4986.8686.8390.029100GE4996.7946.7680.026101GE5006.0726.0370.035102GE5016.3566.3320.024103GE5027.5847.617-0.033水151104GE5035.9825.9120.070105GE5045.9005.8310.069106GE5057.1367.142-0.006107GE5069.0359.0170.018水152108GE5078.1398.159-0.020109GE5088.8578.8390.018110GE5097.8977.8680.029111GE5108.7768.7430.033112GE51110.66910.6330.036113GE51212.73612.7080.028水153114GE51311.46411.4320.032115GE5149.1589.1370.021116GE5156.2126.1890.023117GE5166.2256.1690.056118GE5176.2396.2070.032水154119GE5186.2046.1770.027120GE5195.2465.2010.045121GE5205.7595.772-0.013水155122GE5217.1577.160-0.003123GE5225.0024.9780.024124GE5237.3517.352-0.001125GE5249.9599.9580.001126GE5253.4103.3480.062127GE5265.4395.4260.013水156128GE5277.7487.7320.016129GE52810.64110.6090.032130GE52910.10310.0770.026131GE5307.6557.6330.022水157132GE5317.2277.2190.008133GE5328.7628.7440.018134GE5337.1337.1090.024135GE5345.1555.1270.028136GE5356.0736.0660.007水158137GE5369.1839.1630.020138GE5378.2488.2160.032139GE53812.70012.6680.032140GE53912.93512.9080.027141GE5408.9728.980-0.008142GE5416.2566.2270.029水159143GE5426.4286.4130.015144GE5436.0546.0470.007145GE5444.1944.1810.013146GE5456.8456.8360.009水160147GE5466.9766.9660.010148GE6006.1536.1410.012水161149GE6015.3745.3690.005150GE6025.9475.9180.029151GE6036.8506.8300.020152GE6047.0097.0010.008153GE6058.4597.9060.553154GE6066.7636.7550.008155GE6076.7776.779-0.002156GE6087.1137.1050.008157GE6095.6595.6440.015水163158GE6104.4194.3780.041159GE6116.2056.216-0.011160GE6126.1696.1530.016161GE6136.2436.493-0.250162GE6147.6157.6090.006水164163GE6155.3095.2490.060164GE6165.2965.2680.028165GE6176.8496.8350.014水165166GE6185.9165.9070.009167GE6195.3345.3190.015168GE6204.8285.094-0.266169GE6215.2785.2480.030水166170GE6225.4575.4540.003171GE6235.7485.7120.036172GE6245.7706.051-0.281173GE6256.0996.0880.011水167174GE6266.1056.0950.010175GE6276.4636.4480.015176GE6284.1024.0620.040177GE6295.5085.5010.007水168178GE6306.7376.7220.015179GE6316.1156.1070.008180GE6326.5836.5530.030181GE6335.9945.9880.006水169182GE6345.0074.9960.011183GE63512.37412.3420.032184GE63610.37210.3620.010185GE6377.4607.4430.017水170186GE6385.1265.1070.019187GE6395.1815.1530.028188GE6403.4893.4710.018189GE6416.9936.9790.014水171190GE6425.4555.4360.019191GE6433.1753.1660.009水1723、纵断面测量中桩高程采用全站仪测取，经测算，测量误差不大于2cm。经统计，本次测量的路基中桩高程与2003年测量成果比较，除牟山湖大桥K84+550K84+800段外，建构物顶面高程误差不大于3cm，绝大部分路基段的路基中桩高程差值在8cm间，杭甬向大于8cm的路段为20.74km,甬杭向大于8cm的路段为20.56km。由于杭甬高速公路在20032005年间，杭甬向76.334km甬杭向77.882km路段已经过一次或多次路面加铺，加铺厚度在525cm间，路面加铺是造成路基高程测量成果差异的直接原因。4、横断面测量采用全站仪直接测定横断面点的高程及平面位置的方法。原测的横断面每条间距是50米，这次测量的横断面按25米间距要求，桥头两端断面间距加密至510米。部分新测的横断面与原测的横断面重合。测量前，对全站仪指标差进行了检校，施测时严格控制视距不大于300米，经测算，测量误差不大于2cm ；相邻测站所测的横断面点均有重合点检查，高程校差不大于5cm。横断面测量工作基本上在GPS点上进行，支站次数不超过二次。测量时，对测站点和定向点的平面距离和高程进行了检查。检测边长校差小于5cm，高程校差小于5cm。牟山湖大桥K84+550至K84+800的横断面高程比原测高程高0.2米左右，经过水准仪进行二次检核后，确认这次测量成果